WO2023040652A1 - 一种显示组件及折叠式电子设备 - Google Patents

一种显示组件及折叠式电子设备 Download PDF

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Publication number
WO2023040652A1
WO2023040652A1 PCT/CN2022/115794 CN2022115794W WO2023040652A1 WO 2023040652 A1 WO2023040652 A1 WO 2023040652A1 CN 2022115794 W CN2022115794 W CN 2022115794W WO 2023040652 A1 WO2023040652 A1 WO 2023040652A1
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WIPO (PCT)
Prior art keywords
region
bending
area
flexible screen
display assembly
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2022/115794
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English (en)
French (fr)
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WO2023040652A9 (zh
Inventor
严斌
刘昆
王枝泽
张翼鹤
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Honor Device Co Ltd
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Honor Device Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Honor Device Co Ltd filed Critical Honor Device Co Ltd
Priority to EP22869024.4A priority Critical patent/EP4293995B1/en
Priority to US18/549,396 priority patent/US12510937B2/en
Publication of WO2023040652A1 publication Critical patent/WO2023040652A1/zh
Publication of WO2023040652A9 publication Critical patent/WO2023040652A9/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
    • H04M1/026—Details of the structure or mounting of specific components
    • H04M1/0266—Details of the structure or mounting of specific components for a display module assembly
    • H04M1/0268—Details of the structure or mounting of specific components for a display module assembly including a flexible display panel
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16—Constructional details or arrangements
    • G06F1/1613—Constructional details or arrangements for portable computers
    • G06F1/1633—Constructional details or arrangements of portable computers not specific to the type of enclosures covered by groups G06F1/1615 - G06F1/1626
    • G06F1/1675—Miscellaneous details related to the relative movement between the different enclosures or enclosure parts
    • G06F1/1681—Details related solely to hinges
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16—Constructional details or arrangements
    • G06F1/1613—Constructional details or arrangements for portable computers
    • G06F1/1615—Constructional details or arrangements for portable computers with several enclosures having relative motions, each enclosure supporting at least one I/O or computing function
    • G06F1/1616—Constructional details or arrangements for portable computers with several enclosures having relative motions, each enclosure supporting at least one I/O or computing function with folding flat displays, e.g. laptop computers or notebooks having a clamshell configuration, with body parts pivoting to an open position around an axis parallel to the plane they define in closed position
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16—Constructional details or arrangements
    • G06F1/1613—Constructional details or arrangements for portable computers
    • G06F1/1633—Constructional details or arrangements of portable computers not specific to the type of enclosures covered by groups G06F1/1615 - G06F1/1626
    • G06F1/1637—Details related to the display arrangement, including those related to the mounting of the display in the housing
    • G06F1/1652—Details related to the display arrangement, including those related to the mounting of the display in the housing the display being flexible, e.g. mimicking a sheet of paper, or rollable
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
    • H04M1/0206—Portable telephones comprising a plurality of mechanically joined movable body parts, e.g. hinged housings
    • H04M1/0208—Portable telephones comprising a plurality of mechanically joined movable body parts, e.g. hinged housings characterized by the relative motions of the body parts
    • H04M1/0214—Foldable telephones, i.e. with body parts pivoting to an open position around an axis parallel to the plane they define in closed position
    • H04M1/0216—Foldable in one direction, i.e. using a one degree of freedom hinge

Definitions

  • the present application relates to the technical field of electronic equipment, in particular to a display component and a foldable electronic equipment.
  • the foldable electronic device includes a casing, a folding device and a flexible screen, wherein the casing includes a left casing and a right casing which are arranged in separate parts, the folding assembly is located between the left casing and the right casing, and the flexible screen is installed on the Left case and right case.
  • the bending area of the flexible screen can be driven to fold, so that the electronic device is in a folded state.
  • the volume of the electronic device is small and easy to store Storage;
  • the left casing and the right casing are unfolded under the drive of the folding device, the bending area of the flexible screen is driven to unfold, so that the electronic device is in an unfolded state.
  • the display screen of the electronic device is larger and can Improve user experience.
  • the reliability and service life of the flexible screen affect the performance and service life of the entire electronic device.
  • the back of the flexible screen is usually provided with a protective component, and the flexible screen is protected by the protective component.
  • the bending area of the protective component is bent to form a screen-capacity space for accommodating the flexible screen.
  • the bending stiffness of the bending area of the protective part is too large, the deformation of the protective part during the bending process is too small, and the radius of the screen space after bending is too small, which cannot provide enough space for the flexible screen.
  • the folding position will cause pulling or squeezing of the flexible screen, resulting in undesirable phenomena such as creases or even breakage of the flexible screen.
  • the present application provides a display component and a foldable electronic device.
  • the display component can reduce the risk of delamination and breakage of the screen in the bending area.
  • the first aspect of the present application provides a display assembly for a foldable electronic device, the display assembly includes: a flexible screen; a protection component, the protection component is connected to the flexible screen along a first direction; wherein, the protection The bending area of the component includes a first area and a second area, and along the second direction, the second area is located on both sides of the first area; when the display component is bent, along the second direction, the first area The average amount of deformation of a region is smaller than the average amount of deformation of the second region.
  • the deformation amount of the first region is smaller than that of the second region, thereby reducing the risk of too small radius of the screen space formed due to the excessive deformation of the first region during the folding process, and increasing the The bending radius after the deformation of the large bending area reduces the extrusion of the protective part on the flexible screen, reduces the risk of lamination, delamination and fracture of the flexible screen, and improves the service life and reliability of the display components.
  • the bending stiffness of the first region is greater than the bending stiffness of the second region.
  • the bending stiffness of the protective component is specifically the bending stiffness along the second direction, and the bending stiffness is proportional to the radius of the protective component after bending.
  • the amount of deformation of the first area is smaller than that of the second area, thereby reducing the risk that the radius of the screen space formed by the first area due to excessive deformation during the folding process is too small, and increasing the deformation of the bending area.
  • the bending radius can further reduce the extrusion effect of the protective parts on the flexible screen, reduce the risk of layering, delamination and fracture of the flexible screen, and improve the service life and reliability of the display components.
  • the bending region is provided with a plurality of recessed portions recessed along the first direction, and the plurality of recessed portions are distributed at intervals along the second direction and the third direction.
  • the setting of the concave part reduces the cross-sectional area of the protective part that bears stress during the bending process, thereby reducing the bending stiffness of the bending area, so that the bending area of the protective part can undergo a large deformation during the folding process, thus forming a It is used to accommodate the screen space of the folded part of the flexible screen, thereby helping to realize the folding of the electronic device, and each concave part can reduce the extrusion of the protective part on the folded part of the flexible screen, and reduce the occurrence of lamination, delamination and fracture of the flexible screen. risks of.
  • the area of the first region is S1
  • the total area of the recesses located in the first region is S2, 1/4 ⁇ S2/S1 ⁇ 2/3.
  • S2/S1 is too small
  • the area of the concave portion provided in the first area is too small, resulting in a large bending stiffness of the first area, and the deformation of the first area after being bent is small when the display component is folded, protecting the The components cannot provide enough screen space for the flexible screen, and there is a risk of squeezing the folded part of the flexible screen.
  • S2/S1 is too large, the area of the recessed portion in the first region is too large, resulting in reduced strength of the protection component, prone to breakage during the folding process, and reduced service life of the display component.
  • the area of the second region is S3, the total area of the recesses located in the second region is S4, 1/3 ⁇ S4/S3 ⁇ 2/3.
  • S4/S3 is too small, the area of the recessed part provided in the second area is too small, resulting in a relatively large bending stiffness of the second area, and when the display component is folded, the deformation amount of the second area after bending is small, protecting the The components cannot provide enough screen space for the flexible screen, and there is a risk of squeezing the folded part of the flexible screen.
  • S4/S3 is too large, the area of the recessed portion in the second area is too large, resulting in reduced strength of the protection component, prone to breakage during the folding process, and reduced service life of the display component.
  • the total area of the depressions located in the first region is S2, and the total area of the depressions located in the second region is For S4, 3/4 ⁇ S2/S4 ⁇ 1.
  • S2/S4 is too large, the total area of the depressions in the first region is larger than the total area of the depressions in the second region, so that the bending stiffness of the first region is smaller than that of the second region, resulting in The bending shape tends to be elliptical, the bending radius of the first area is too small, and there is a risk of squeezing the folded part of the flexible screen;
  • S2/S4 is too small, the total area of the depressions in the first area is smaller than that of the second area
  • the total area of the depressions, and the difference between the total areas of the depressions of the two is relatively large, resulting in the bending stiffness of the first region being much greater than that of the second region, resulting in excessive deformation of the first region during
  • the risk of squeezing the flexible screen during the bending process of the protection component can be effectively reduced.
  • the length of the depression in the first region is the same as the length of the depression in the second region, and the width of the depression in the first region is the same as the width of the depression in the second region
  • the The depth t1 of the depression in the first region is smaller than the depth t2 of the depression in the second region. The smaller the depth of the depression, the greater the thickness of the bottom wall of the depression, and the bottom wall of the depression can be used to bear the stress during the bending process of the protection component.
  • the greater the thickness of the bottom wall of the depression the greater the protection
  • the bending stiffness of the first region of the protection component is greater than the bending stiffness of the second region of the protection component.
  • the recessed part located in the first area is a groove
  • the recessed part located in the second area is a through hole penetrating the protection component along a first direction.
  • the depth of the recess reaches the maximum, and the bending stiffness of the second area can be further reduced compared with the first area, so that the difference between the bending stiffness of the first area and the bending stiffness of the second area is larger , during the folding process of the display component, it not only ensures that the protective part has a large degree of deformation when it is bent, so as to form enough space for the screen, but also makes the bending shape of the bending area tend to be circular, reducing the bending area Squeeze to the folded part of the flexible screen.
  • 1 ⁇ A1/A2 ⁇ 1.5 If A1/A2 is too small, the bending stiffness of the first area is smaller than the bending stiffness of the second area, resulting in the bending shape of the bending area tending to be elliptical, and the bending radius of the first area is too small, causing the folding of the flexible screen to be squeezed Partial risk; if A1/A2 is too large, the bending stiffness difference between the first area and the second area is relatively large, resulting in too little deformation of the first area during the bending process, and there is also the possibility of squeezing the folded part of the flexible screen risk.
  • the dimension of the concave portion of the first region along the second direction is B1
  • the dimension of the concave portion of the second region along the second direction is B2, and B1 ⁇ B2.
  • the larger the width of the depression the less material there is in the area without the depression, and since the area without the depression is mainly used to bear the stress during the bending process of the protection component, when no depression is provided
  • the cross-sectional area of the region where no recess is provided is smaller, and the bending rigidity of the protective part in the corresponding region is smaller. Since B1 ⁇ B2, the bending stiffness of the first region is greater than that of the second region.
  • 1 ⁇ B2/B1 ⁇ 1.5 If B2/B1 is too small, the bending stiffness of the first area is smaller than the bending stiffness of the second area, resulting in the bending shape of the bending area tending to be elliptical, and the bending radius of the first area is too small, causing the folding of the flexible screen to be squeezed part of the risk; if B2/B1 is too large, the bending stiffness difference between the first area and the second area is relatively large, resulting in too little deformation of the first area during the bending process, and there is also the possibility of squeezing the folded part of the flexible screen risk.
  • the dimension of the recessed portion of the first region along the third direction is C1
  • the dimension of the recessed portion of the second region along the third direction is C2, and C1 ⁇ C2.
  • the larger the length dimension of the recessed portion is, the less material is not provided with the recessed portion in this area, and the lower the bending stiffness of the protective component in the corresponding area. Since C1 ⁇ C2, the bending stiffness of the first region is greater than that of the second region.
  • 1 ⁇ A3/A4 ⁇ 1.5 If A3/A4 is too small, the bending stiffness of the first area is smaller than the bending stiffness of the second area, causing the bending shape of the bending area to tend to be elliptical, and the bending radius of the first area is too small, causing the folding of the flexible screen to be squeezed Partial risk; if A3/A4 is too large, the difference in bending stiffness between the first area and the second area is relatively large, resulting in too little deformation of the first area during the bending process, and there is also the possibility of squeezing the folded part of the flexible screen risk.
  • the second region includes at least a first layer and a second layer stacked on each other along the first direction, the first region includes a third layer, and the thickness of the third layer is the same as that of the The sum of the thicknesses of the first layer and the second layer is the same; the elastic modulus of the material of the first layer and the third layer is greater than the elastic modulus of the material of the second layer. That is, the overall elastic modulus of the first region is greater than the overall elastic modulus of the second region.
  • the cross-sectional area is the same, the greater the elastic modulus, the greater the bending stiffness, and the smaller the degree of deformation. Therefore, the bending stiffness of the first area is greater than that of the second area, thereby reducing the excessive deformation of the first area during the folding process. This leads to the risk that the radius of the formed screen space is too small.
  • the width of the first region is D1
  • the width of the bending region of the protective component is D2, 1/2 ⁇ D1/D2 ⁇ 2/3.
  • D1/D2 the size of the first region along the second direction is too large, and the bending stiffness of the first region is greater than that of the second region, that is, the region with a larger bending stiffness in the bending zone If the proportion is too large, the overall deformation of the bending area during the folding process is too small, resulting in that the bending area cannot provide enough screen space for the folding part of the flexible screen, and increases the bending difficulty of the display component;
  • D1/ If the value of D2 is too small, the size of the first region along the second direction is too small, and the bending stiffness of the first region is greater than that of the second region, that is, the proportion of the first region with higher bending stiffness in the bending zone is If it is too small, the first area cannot provide effective support during the folding process, so that the bending radius of the bending area
  • the thickness of at least part of the second region is smaller than the thickness of the first region, that is, the second region has a thinned region. Due to the setting of the thinned area, the second area has less material than the first area for bearing the stress during the bending process of the protective component, so that the bending stiffness of the second area is smaller than that of the first area.
  • the second aspect of the present application provides a foldable electronic device, which includes: a casing; a display component, the display component is the display component described in any one of the above; wherein, the display component is installed in the housing.
  • the case includes a first case and a second case.
  • the first casing and the second casing are roughly located on the same plane, so that the flexible screen is roughly flat.
  • the flexible screen is exposed, and the user can operate the flexible screen, and the flexible screen can display information such as images or videos.
  • the flexible screen In order to realize a large-screen display and improve the user's viewing experience.
  • the flexible screen In this folded state, the flexible screen is located in the space enclosed by the folded first casing and the second casing. At this time, the flexible screen is not exposed, and the user cannot operate the flexible screen.
  • the electronic device is easy to store and carry.
  • FIG. 1 is a partial structural schematic diagram of a foldable electronic device in the prior art
  • FIG. 2 is a schematic structural diagram of the display assembly in FIG. 1 in an unfolded state
  • FIG. 3 is an effect diagram showing the stretching of the display component in FIG. 2 in an unfolded state
  • FIG. 4 is a schematic structural view of the display assembly in FIG. 2 in a bent state
  • Fig. 5 is a schematic structural diagram of a specific embodiment of the display assembly provided by the present application, wherein the display assembly is in an unfolded state;
  • Fig. 6 is the bottom view of Fig. 5;
  • Fig. 7 is a structural schematic diagram of the bending area of the protective component in Fig. 5;
  • FIG. 8 is a schematic structural view of the display assembly in FIG. 5 in a bent state
  • Fig. 9 is a schematic structural diagram of a display assembly provided in the present application in a second specific embodiment, wherein the display assembly is in an unfolded state;
  • Figure 10 is a bottom view of Figure 9;
  • Fig. 11 is a schematic structural view of the bending area of the protective component in Fig. 9;
  • FIG. 12 is a schematic structural view of the display assembly of FIG. 9 in a bent state
  • Fig. 13 is a schematic structural diagram of a display assembly provided in the present application in a third specific embodiment, wherein the display assembly is in an unfolded state;
  • Figure 14 is a bottom view of Figure 13;
  • Fig. 15 is a structural schematic diagram of the bending area of the protective component in Fig. 13;
  • Fig. 16 is a schematic structural view of the fourth and fifth specific embodiments of the display assembly provided by the present application, wherein the display assembly is in an unfolded state;
  • FIG. 17 is a schematic structural view of the bending area of the display assembly shown in FIG. 16;
  • Fig. 18 is a schematic structural diagram of a sixth specific embodiment of a display assembly provided by the present application, wherein the display assembly is in an unfolded state;
  • Fig. 19 is a schematic structural diagram of the seventh specific embodiment of the display assembly provided by the present application, wherein the display assembly is in an unfolded state;
  • Figure 20 is a bottom view of Figure 19;
  • Fig. 21 is a schematic structural view of the display assembly provided in the present application in a bent state, wherein the display assembly is in the shape of a bat;
  • Fig. 22 is a partially enlarged view of the first area of the display assembly provided by the present application in the unfolded state, in which the two ends of the concave part on the protective part are circular;
  • Fig. 23 is a partially enlarged view of the first area of the display assembly provided in the present application in an unfolded state, wherein the concave portion on the protective component is irregular in shape.
  • Figure 1 is a partial structural schematic diagram of a foldable electronic device, which includes a display assembly, a drive chip 13a (drive IC), a mounting part 14a, a circuit board 15a, etc., wherein the display assembly includes a
  • the folded flexible screen 2a and the protective part 1a used to protect the flexible screen 2a, the mounting part 14a can install the flexible screen 2a on the protective part 1a through a plastic-chip package (chip on plastic, COP) or other packaging methods, and the driving chip 13a is electrically connected to the circuit board 15a and the flexible screen 2a, and is used to drive the display of the flexible screen 2a.
  • the circuit board 15a can be a flexible printed circuit board (flexible printed circuit board, FPC).
  • FIG. 2 the structure of the display assembly in FIG. 1 in the unfolded state is shown in FIG. 2.
  • both the protective part 1a and the flexible screen 2a are folded, and the bending area of the protective part 1a is folded to form a
  • the concave part 11a is usually etched and processed in the bending area of the protective part 1a, thereby reducing
  • the bending rigidity of the small bending area makes the protective component 1a deform greatly during the bending process, thereby increasing the screen space to a certain extent, and reducing the pulling and pulling of the flexible screen 2a by the bending area of the protective component 1a. extrusion.
  • Figure 3 is the effect diagram of the display assembly in Figure 1 being stretched in the unfolded state, stretching the protective part 1a along the width direction, the concave part 11a is deformed and the volume increases, correspondingly when the protective part 1a bends When folded, the volume of the recessed portion 11a also increases accordingly, providing a space for the bent flexible screen 2a, and reducing the pulling and squeezing of the flexible screen 2a by the bending area of the protective component 1a.
  • the bending area of the flexible screen 2a and the bending area of the protective part 1a are usually bent into an arc-shaped structure, and the smaller the radius of the arc-shaped structure formed after the bending area of the protective part 1a is bent, the greater the capacity of the screen.
  • FIG. 4 is a schematic structural diagram of the display assembly in FIG. 1 in a bent state, where the dotted line shows the ideal state of the first region 12a of the bending area of the protective component 1a during the bending process .
  • the first region 12a of the bending region of the protection component 1a has the largest amount of deformation in the folded state, and when the deformation amount of the first region 12a is too large (bending too large), the arc-shaped structure formed will be deformed.
  • the radius is too small, that is, the actual bending radius of the first region 12a is smaller than the ideal radius shown by the dotted line, and the shape after bending is often elliptical (different from the circular arc shape after bending in the ideal state), resulting in The extrusion of the flexible screen 2a is too large, and the flexible screen 2a may be delaminated or broken.
  • an embodiment of the present application provides a foldable electronic device
  • the foldable electronic device includes, for example, a mobile phone, a tablet computer, a personal digital assistant (personal digital assistant, PDA), a notebook computer, a vehicle computer, a foldable display devices, foldable displays, wearables, anything with a foldable screen.
  • PDA personal digital assistant
  • the embodiment of the present application does not impose special restrictions on the specific form of the above-mentioned foldable electronic device.
  • the following description takes the foldable electronic device as a mobile phone as an example.
  • a foldable electronic device includes a foldable device, a first casing, a second casing and a display assembly, wherein the display assembly includes a flexible screen for displaying images, videos and the like.
  • the flexible screen can be an active matrix organic light-emitting diode or an active-matrix organic light-emitting diode (active-matrix organic light-emitting diode, AMOLED) display
  • AMOLED display is a self-luminous display without setting a backlight module (BLM). Therefore, when the base substrate in the AMOLED display is made of a flexible resin material, such as polyethylene terephthalate (PET), the AMOLED display can have a bendable property.
  • the flexible screen 2 can also be an organic light-emitting diode (organic light-emitting diode, OLED) display, a mini organic light-emitting diode (mini organic light-emitting diode) display, a micro-light-emitting diode (micro organic light-emitting diode) display , Micro organic light-emitting diode (micro organic light-emitting diode) display, quantum dot light-emitting diodes (quantum dot light emitting diodes, QLED) display, etc.
  • OLED organic light-emitting diode
  • mini organic light-emitting diode mini organic light-emitting diode
  • micro-light-emitting diode micro-light-emitting diode
  • Micro organic light-emitting diode micro organic light-emitting diode
  • QLED quantum dot light-emitting diodes
  • the first casing (not shown in the figure) and the second casing (not shown in the figure) are distributed at intervals, and the first casing and the second casing can also be the middle frame structure of the foldable electronic device , the first shell and the second shell are used to install components such as batteries, circuit boards, cameras, earphones, earpieces, buttons, batteries, etc. of electronic equipment, and the first shell and the second shell are also used to carry flexible
  • the screen that is, the flexible screen is fixedly connected (for example, pasted) to the first housing and the second housing, so that the flexible screen is kept flat as much as possible during use, and the non-display surface of the flexible screen is protected.
  • the folding device (not shown in the figure) is located between the first casing and the second casing, and is connected with the first casing and the second casing.
  • the display assembly at least includes the unfolded state shown in FIG. 6 and the folded state shown in FIG.
  • the screen 2 is roughly flat.
  • the flexible screen 2 is exposed, and the user can operate the flexible screen 2, and the flexible screen 2 can display information such as images or videos, so as to realize large-screen display and improve the user's viewing experience.
  • the first casing and the second casing can rotate toward each other (that is, the relative rotation of the first casing and the second casing close to each other), thereby driving the display assembly to fold, so that the display assembly is in The folded state shown in FIG. 8 , and the display assembly in this embodiment has a flexible screen 2 folded inward structure.
  • the flexible screen 2 In this folded state, the flexible screen 2 is located in the space enclosed by the folded first casing and the second casing. At this time, the flexible screen 2 is not exposed, and the user cannot operate the flexible screen 2.
  • the electronic device is easy to store and carry. And when the display assembly is in the folded state, the first casing and the second casing can rotate (the rotation direction is opposite to that during folding), so that the display assembly is in the unfolded state shown in FIG. 6 .
  • the flexible screen 2 may include a first part 21, a second part 22 and a folding part 23 between them, wherein the first part 21 Corresponding to and connected to the first housing, the second part 22 is corresponding to and connected to the second housing, and the folding part 23 corresponds to the folding device. During the folding process of the folding device, the folding part 23 is folded to form a The folding part 23 of the flexible screen 2.
  • the first direction Z is the thickness direction of the protection component 1
  • the second direction X is the width direction of the protection component 1
  • the third direction Y is the length direction of the protection component 1 as an example.
  • the display assembly also includes a protective component 1, which is located on the side of the flexible screen 2 away from the display surface and is used to protect the flexible screen 2.
  • a protective component 1 which is located on the side of the flexible screen 2 away from the display surface and is used to protect the flexible screen 2.
  • the bending area of the protection component 1 includes a first area 12 and a second area 13 , and along the second direction X, the second area 13 is located at the side of the first area 12 Both sides: when the display component is bent, along the second direction X, the average deformation of the first region 12 is smaller than the average deformation of the second region 13 .
  • the average deformation amount of the first region 12 described in the embodiment of the present application is defined as: the deformation amount of the first region 12 per unit length along the second direction X of the protective component 1 after the display assembly is bent;
  • the average deformation of the second region 13 is defined as: the deformation of the second region 13 per unit length along the second direction X of the protection component 1 after the display assembly is bent.
  • the bending area of the protection component 1 forms a screen space for accommodating the folding part 23 of the flexible screen 2 when the display assembly is in the folded state.
  • the average deformation of the first area 12 The amount is smaller than the average deformation amount of the second region 13, thereby reducing the risk of the radius of the screen space formed by the first region 12 being too small due to the excessive average deformation amount during the folding process, and increasing the bend after deformation of the bending region.
  • the folding radius can further reduce the extrusion effect of the protective component 1 on the flexible screen 2, reduce the risk of lamination, delamination and fracture of the flexible screen 2, and improve the service life and reliability of the display components.
  • the bending stiffness of the first region 12 is greater than the bending stiffness of the second region 13 .
  • the bending stiffness described herein is specifically the bending stiffness along the second direction X, and the bending stiffness is proportional to the radius of the protective component 1 after bending, specifically:
  • ⁇ is the radius of the bending zone of the protection component 1 after bending
  • M is the maximum bending moment on the protection component 1
  • EI is the section bending stiffness of the protection component 1 .
  • the deformation amount and the bending stiffness of the protective component 1 during bending have an opposite relationship, that is, under the same bending moment, for the same material, the greater the deformation amount, the smaller the bending stiffness.
  • the arrangement direction of the first part 21, the folded part 23 and the second part 22 of the flexible screen 2 is defined as the second direction X (shown as left and right direction); in the plane where the flexible screen 2 (expanded state) is located, the direction perpendicular to the arrangement direction of the first part 21, the folded part 23 and the second part 22 is defined as the third direction Y (shown as the up and down direction in FIG. 6 ); the direction perpendicular to the second direction X and the third direction Y is defined as the first direction Z (shown as the up-down direction in FIG. 5 ).
  • the bending area of the protective component 1 forms a screen space for accommodating the folding portion 23 of the flexible screen 2 when the display assembly is in the folded state, and because the first area 12 of the bending area of the protective component 1 The amount of deformation is the largest when the display assembly is in the folded state.
  • the amount of deformation of the first region 12 is smaller than that of the second region 13, so as to reduce the risk that the radius of the screen space formed by the first region 12 is too small due to excessive deformation during the folding process, and increase the bending radius of the deformed bending area, Furthermore, under the extrusion effect of the protective component 1 on the flexible screen 2, the risk of lamination, delamination and fracture of the flexible screen 2 is reduced, and the service life and reliability of the display components are improved.
  • the protective component 1 can be specifically a metal sheet, and the protective component 1 can be pasted on the side of the flexible screen 2 facing away from the display end along the first direction Z, so that the flexible screen 2 can be protected by the protective component 1 .
  • the first region 12 and the second region 13 with different bending stiffness in the bending region of the protective component 1 can be realized in various ways, and the first region 12 and the second region with different bending stiffness will be described in detail below 13 different implementations.
  • Fig. 9, Fig. 13 and Fig. 18 are all structural schematic diagrams of different specific embodiments of the display assembly provided by the present application.
  • the folding area is provided with a plurality of recessed portions 11 recessed along the first direction Z, and the plurality of recessed portions 11 are distributed at intervals along the second direction X and the third direction Y.
  • the setting of the recessed part 11 reduces the cross-sectional area of the protection component 1 that bears stress during the bending process, thereby reducing the bending stiffness of the bending area, so that the bending area of the protection component 1 can be greatly deformed during the folding process, Thereby forming a screen-holding space for accommodating the folded portion 23 of the flexible screen 2, thereby facilitating the realization of the folding of the electronic device, and each recess 11 can reduce the extrusion of the protective component 1 to the folded portion 23 of the flexible screen 2, The risk of delamination and breakage of the flexible screen 2 is reduced.
  • the protective part 1 is provided with the recessed part 11, it is also convenient to realize the first region 12 and the second region 13 with different bending stiffness by changing the size of the recessed part 11.
  • the area of the first region 12 is S1
  • the total area of the recessed portion 11 located in the first region 12 is S2, 1/4 ⁇ S2/ S1 ⁇ 2/3.
  • S2/S1 can specifically be 1/4, 3/8, 1/2, 2/3, etc.
  • the ratio of the total area S2 of the recessed portion 11 located in the first region 12 to the area S1 of the first region 12 should not be too large or too small. If S2/S1 is too small (for example, less than 1/4), the area of the recessed portion 11 provided in the first region 12 is too small, resulting in a large bending stiffness of the first region 12, and the first region 12 bends when the display assembly is folded. The amount of deformation after folding is small, and the protective component 1 cannot provide enough space for the flexible screen 2 , and there is a risk of squeezing the folded portion 23 of the flexible screen 2 .
  • S2/S1 is too large (for example, greater than 2/3)
  • the area of the recessed portion 11 provided in the first region 12 is too large, resulting in a reduction in the strength of the protection component 1, which is prone to breakage during the folding process, and reduces the strength of the display assembly. service life.
  • the area of the second region 13 is S3
  • the total area of the recessed portion 11 located in the second region 13 is S4, 1/3 ⁇ S4/ S3 ⁇ 2/3.
  • S4/S3 can specifically be 1/3, 3/8, 1/2, 2/3, etc.
  • the ratio of the total area S4 of the recessed portion 11 located in the second region 13 to the area S3 of the second region 13 should not be too large or too small. If S4/S3 is too small (for example, less than 1/3), the area of the recessed portion 11 provided in the second region 13 is too small, resulting in a large bending stiffness of the second region 13, and the second region 13 bends when the display assembly is folded. The amount of deformation after folding is small, and the protective component 1 cannot provide enough space for the flexible screen 2 , and there is a risk of squeezing the folded portion 23 of the flexible screen 2 .
  • S4/S3 is too large (for example, greater than 2/3), the area of the recessed portion 11 provided in the second region 13 is too large, resulting in a reduction in the strength of the protective component 1, which is prone to breakage during the folding process, and reduces the strength of the display assembly. service life.
  • S2/S4 can specifically be 3/4, 1/2, 5/8, etc.
  • the depth of the depressed portion 11 in the first region 12 is the same as the depth of the depressed portion 11 in the second region 13 .
  • the total area S2 of the recessed portion 11 located in the first region 12 is related to the bending stiffness of the first region 12
  • the total area S4 of the recessed portion 11 located in the second region 13 is related to the bending stiffness of the first region 12
  • S2 The larger S2 is, the smaller the bending stiffness of the first region 12 is, and the larger S4 is, the greater the bending stiffness of the second region 13 is. Therefore, the size of S2/S4 can represent the bending stiffness of the first region 12 and the bending stiffness of the second region 13. The size of the stiffness.
  • S2/S4 is too large (for example greater than 1), then the total area of the recessed portion 11 of the first region 12 is greater than the total area of the recessed portion 11 of the second region 13, so that the bending stiffness of the first region 12 is smaller than that of the second region 13
  • the bending stiffness of the bending area causes the bending shape of the bending area to tend to be elliptical, and the bending radius of the first area 12 is too small, so there is a risk of squeezing the folding part 23 of the flexible screen 2;
  • S2/S4 is too small (for example, less than 3 /4)
  • the total area of the depressions 11 in the first region 12 is less than the total area of the depressions 11 in the second region 13, and the difference between the total areas of the depressions 11 of the two is larger, resulting in the first region 12
  • the bending stiffness of the second region 13 is much greater than that of the second region 13, resulting in too little deformation of the first region 12 during the bending process, and there is also
  • FIG. 7 is a schematic structural view of the bending area of the protective component 1 in FIG.
  • the depth t1 of the depressed portion 11 in the first region 12 is smaller than that of the depressed portion 11 in the second region 13. The depth t2.
  • the bending stiffness of the first region 12 of the protection component 1 is greater than the bending stiffness of the second region 13 of the protection component 1 , so that when the protective component 1 receives the same external force, the deformation amount of the first region 12 is smaller than the deformation amount of the second region 13 .
  • the first region 12 and the second region 13 with different bending rigidities can be conveniently realized, and the structure of the protection component 1 can be simplified.
  • the change from the depth t1 of the depressed portion 11 in the first region 12 to the depth t2 of the depressed portion 11 in the second region 13 can be set in a gradual manner, that is, along the second direction X, the depth of the depressed portion 11 changes from the first
  • the center of the area 12 gradually increases toward the second area 13 away from the two sides of the first area 12, so that the bending stiffness of the protective component 1 changes more smoothly, and the bending radius of the first area 12 and the second area 13 is reduced when bending.
  • the stress concentration caused by the sudden change increases the service life of the protection component 1 .
  • the recessed portion 11 located in the first area 12 is a groove 112
  • the recessed portion 11 located in the second area 13 is a through hole 111, that is, the recessed portion located in the second area 13 11 penetrates the protection component 1 along the first direction Z, and the recess 11 located in the first region 12 does not penetrate the protection component 1 .
  • the recessed portion 11 of the second region 13 when the recessed portion 11 of the second region 13 is a through hole 111, the depth of the recessed portion 11 reaches the maximum, and compared with the first region 12, the bending stiffness of the second region 13 can be further reduced, so that The difference between the bending stiffness of the first region 12 and the bending stiffness of the second region 13 is larger.
  • the protective component 1 has a large degree of deformation when it is bent, so that it can form a sufficient
  • the space for the screen is widened, and the bending shape of the bending area tends to be circular, so as to reduce the extrusion of the folding portion 23 of the flexible screen 2 by the bending area.
  • the processing of the protection component 1 when the recessed portion 11 of the second region 13 is a through hole 111 , the processing of the protection component 1 can be simplified and the processing accuracy can be reduced.
  • Figure 9 is a schematic structural view of the display assembly in the second specific embodiment
  • Figure 10 is a bottom view of Figure 9
  • Figure 11 is a protective component 1 Schematic diagram of the structure of the bending area, there is a first distance A1 between adjacent concave parts 11 of the first region 12 along the second direction X, and there is a first distance A1 between adjacent concave parts 11 of the second region 13 along the second direction X.
  • A1 and A2 are the minimum distances between adjacent recesses 11 on the protection component 1 along the second direction X of the protection component 1 .
  • the bending stiffness is greater in the corresponding region. Because the first distance A1 is greater than the second distance A2 , the bending stiffness of the first region 12 is greater than that of the second region 13 .
  • the bending stiffness of the first region 12 is greater than the bending stiffness of the second region 13 by changing the distance between the first region 12 and the second region 13 of the protective component 1 along the distance between the recesses 11 along the second direction X.
  • Rigidity simplify the structure of the protection part 1.
  • A1/A2 can specifically be 1.2, 1.3, 1.4, 1.5, etc.
  • the ratio of the first distance A1 to the second distance A2 should not be too large or too small, if A1/A2 is too small (for example, less than 1), the bending stiffness of the first region 12 is smaller than the bending stiffness of the second region 13 , causing the bending shape of the bending area to tend to be elliptical, the bending radius of the first area 12 is too small, and there is a risk of squeezing the folding part 23 of the flexible screen 2; if A1/A2 is too large (for example, greater than 1.5), the second The difference in bending stiffness between the first region 12 and the second region 13 is relatively large, resulting in too little deformation of the first region 12 during the bending process, and there is also a risk of crushing the folded portion 23 of the flexible screen 2 .
  • A1/A2 is too small (for example, less than 1)
  • the bending stiffness of the first region 12 is smaller than the bending stiffness of the second region 13 , causing the bending shape of the bending area to
  • Figure 13 is a schematic structural view of the display assembly in the third specific embodiment
  • Figure 14 is a bottom view of Figure 13
  • Figure 15 is the Schematic diagram of the structure of the bending area of the protective component 1
  • the dimension of the concave portion 11 of the first region 12 along the second direction X is B1
  • the dimension of the concave portion 11 of the second region 13 along the second direction X is B2, B1 ⁇ B2 .
  • B1 and B2 are the maximum distance along the second direction X of the recessed portion 11 on the protective component 1 .
  • B2/B1 can specifically be 1.2, 1.3, 1.4, 1.5 and so on.
  • the value of the width dimension B2/B1 of the concave portion 11 should not be too large or too small, if B2/B1 is too small (for example, less than 1), the bending stiffness of the first region 12 is smaller than that of the first region 12.
  • the bending stiffness of the second region 13 causes the bending shape of the bending region to tend to be elliptical, and the bending radius of the first region 12 is too small, which may cause the risk of squeezing the folding part 23 of the flexible screen 2; if B2/B1 is too large ( For example, greater than 1.5), the difference in bending stiffness between the first region 12 and the second region 13 is relatively large, resulting in too little deformation of the first region 12 during the bending process, and there is also a risk of squeezing the folded portion 23 of the flexible screen 2 .
  • the bending radius of the first region 12 after bending can be increased, thereby reducing the bending area of the protective component 1 Squeezing of the folded portion 23 of the flexible screen 2 .
  • Figure 16 is a schematic structural view of the display assembly in this embodiment
  • Figure 17 is a structural schematic view of the bending area of the display assembly in Figure 16, wherein , the display assembly is in the unfolded state.
  • the dimension of the recessed portion 11 of the first area 12 along the third direction Y is C1
  • the dimension of the recessed portion 11 of the second area 13 along the third direction Y is C2, C1 ⁇ C2.
  • C1 and C2 are the maximum distance along the third direction Y of the recessed portion 11 on the protective component 1 .
  • C2/C1 can specifically be 1.2, 1.3, 1.4, 1.5, etc.
  • the value of the length dimension C2/C1 of the concave portion 11 should not be too large or too small, when the value of C2/C1 is too small (for example, less than 1), the bending stiffness of the second region 13 will be greater than the bending stiffness of the first region 12, causing the bending shape of the bending region to tend to be elliptical, and the bending radius of the first region 12 is too small, and there is a risk of squeezing the folding part 23 of the flexible screen 2; when C2/ When the value of C1 is too large (for example, greater than 1.5), the bending stiffness difference between the second region 13 and the first region 12 is relatively large, resulting in the deformation of the first region 12 being too small during the bending process, and there is also the possibility of extrusion of the flexible screen.
  • Figure 16 is a schematic structural view of the display assembly in this specific embodiment
  • Figure 17 is a structural schematic view of the bending area of the display assembly in Figure 16
  • A3 and A4 are the minimum distances along the third direction Y between adjacent recessed parts 11 on the protective component 1 .
  • the cross-sectional area of the area without the concave portion 11 is larger, so that the bending stiffness of the protective component 1 in the corresponding area is greater.
  • the third distance A3 is greater than the fourth distance A4
  • the bending stiffness of the first region 12 is greater than that of the second region 13 .
  • the bending stiffness of the first region 12 is greater than that of the second region 13 by changing the distance between the recesses 11 in the first region 12 and the second region 13 of the protective component 1 along the third direction Y. Rigidity, simplify the structure of the protection part 1.
  • A3/A4 can specifically be 1.2, 1.3, 1.4, 1.5, etc.
  • the ratio of the third distance A3 to the fourth distance A4 should not be too large or too small, if A3/A4 is too small (for example, less than 1), the bending stiffness of the first region 12 is smaller than the bending stiffness of the second region 13 , the bending shape of the bending area tends to be elliptical, the bending radius of the first area 12 is too small, and there is a risk of squeezing the folding part 23 of the flexible screen 2; if A3/A4 is too large (for example, greater than 1.5), the second The difference in bending stiffness between the first region 12 and the second region 13 is relatively large, resulting in too little deformation of the first region 12 during the bending process, and there is also a risk of crushing the folded portion 23 of the flexible screen 2 .
  • the bending radius of the first region 12 after bending can be increased, thereby reducing the bending area of the protective component 1 Squeezing of the folded portion 23 of the flexible screen 2 .
  • FIG. 18 is a schematic structural diagram of the display assembly in this specific embodiment, wherein, the display assembly is in an unfolded state, and the second area 13 along the first direction Z includes at least The first layer 15 and the second layer 16 stacked on each other, the first region 12 includes a third layer 17, along the first direction Z, the thickness of the third layer 17 is equal to the thickness of the first layer 15 and the thickness of the second layer 16 And the same, the third layer 17 and the first layer 15 can be an integral structure, also can be a split structure, and the elastic modulus of the material of the first layer 15 and the third layer 17 is greater than the elasticity of the material of the second layer 16 modulus.
  • the first region 12 includes a third layer 17 with a larger elastic modulus
  • the second region 13 includes a first layer 15 with a larger elastic modulus and a second layer 16 with a smaller elastic modulus
  • the thickness of the third layer 17 is the same as the sum of the thickness of the first layer 15 and the thickness of the second layer 16 , that is, the overall elastic modulus of the first region 12 is greater than the overall elastic modulus of the second region 13 .
  • the cross-sectional area is the same, the greater the elastic modulus, the greater the bending stiffness, and the smaller the deformation during bending. Therefore, the bending stiffness of the first region 12 is greater than that of the second region 13, thereby reducing the bending stiffness of the first region 12.
  • the first layer 15 and the second layer 16 may be adhered to each other.
  • Figure 19 is a schematic structural view of the display assembly in the seventh specific embodiment, and Figure 20 is a bottom view of Figure 19, along the first direction Z , the thickness of at least part of the second region 13 is smaller than the thickness of the first region 12, that is, the second region 13 has a thinned region 18, the thickness of the thinned region 18 is smaller than the thickness of the first region 12, and the second region 13 is entirely thinned region 18 or partially thinned region 18 .
  • the second region 13 since the second region 13 is provided with a thinned region 18, the second region 13 has less material for bearing the stress during the bending process of the protective component 1 than the first region 12, thereby realizing the thickness of the second region 13.
  • the bending stiffness is less than the bending stiffness of the first region 12 .
  • the width of the first region 12 is D1
  • the width of the bending area of the protective component 1 is D2, 1/2 ⁇ D1/D2 ⁇ 2/3.
  • D1/D2 can specifically be 0.5, 0.55, 0.6, etc.
  • D1/D2 can represent the proportion of the part with higher bending stiffness in the bending zone in the whole bending zone Proportion.
  • the value of D1/D2 should not be too large or too small.
  • the size of the first region 12 along the second direction X is too large, and the bending stiffness is the bending stiffness in the bending area.
  • the proportion of the larger area is too large, resulting in the overall deformation of the bending area being too small during the folding process, resulting in that the bending area cannot provide enough screen space for the folding part 23 of the flexible screen 2, and increases the bending of the display component.
  • the folding portion 23 of the flexible screen 2 is folded into a baseball bat shape. It can be seen from the figure that the folding portion 23 of the flexible screen 2 Only one folding is performed, that is, the bending area of the protective component 1 is folded once, and at this time, the first area 12 and the second area 13 of the bending area correspond to the folding portion 23 of the flexible screen 2 .
  • the folding part 23 of the flexible screen 2 is folded into a drop shape. It can be seen from the figure that the folding part 23 of the flexible screen 2 23 is folded on both sides, that is, the bending area of the protective component 1 is folded twice.
  • the folded portion 23 includes a first folded portion 231 and a second folded portion 232, wherein the first folded portion 231 is arc-shaped, and accordingly, the bending area of the protective component 1 includes the first area 12 and the second In addition to the second area 13, it also includes two outer areas 14, the two outer areas 14 are located on the side of the two second areas 13 away from the first area 12 along the second direction X, and when the display component is in the folded state, the two outer areas 14 The outer region 14 corresponds to the second folded portion 232 of the flexible screen 2 .
  • the concave portion 11 can be a regular shape such as a rectangular structure, or other shapes, for example, as shown in Figure 22 and Figure 23,
  • Figure 22 and Figure 23 are the display components provided by the application in the unfolded state
  • the two ends of the recessed part 11 of the protective component 1 may also include circular arc segments or shapes with uneven dimensions along the second direction X, thereby reducing the stress concentration of the recessed part 11 and improving Protects the structural strength of the component 1 and display assembly.
  • the first distance A1 in the figure is the minimum distance between adjacent depressions 11 on the same cross section
  • the fifth distance A5 is the distance between adjacent depressions 11 along the second direction X. the minimum distance between.
  • the shape of the concave portion 11 of the second region 13 can be consistent with that of the first region 12 , or it can be inconsistent, and the bending stiffness of the first region 12 is greater than that of the second region 13 .

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Abstract

本申请涉及一种显示组件及折叠式电子设备，该显示组件包括：柔性屏；保护部件，该保护部件沿第一方向与柔性屏连接；其中，保护部件的弯折区包括第一区域和第二区域，沿第二方向，第二区域位于第一区域的两侧；显示组件弯折时，沿第二方向，第一区域的平均变形量小于第二区域的平均变形量。该保护部件的弯折区在显示组件处于折叠状态时形成用于容纳柔性屏的折叠部分的容屏空间。在相同的外力下，第一区域的变形量小于第二区域的变形量，从而降低第一区域在折叠过程中因变形量过大而导致形成的容屏空间的半径过小的风险，进而降低保护部件对柔性屏的挤压，减小柔性屏发生层叠分层、断裂的风险，提高显示组件的使用寿命和可靠性。

Description

一种显示组件及折叠式电子设备
本申请要求于2021年09月18日提交中国专利局、申请号为202111097307.4、发明名称为“一种显示组件及折叠式电子设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及电子设备技术领域，尤其涉及一种显示组件及折叠式电子设备。
背景技术
折叠式电子设备包括壳体、折叠装置和柔性屏，其中，壳体包括分体设置的左壳体和右壳体，折叠组件位于左壳体和右壳体之间，同时，柔性屏安装于左壳体和右壳体。当左壳体和右壳体在折叠装置的驱动下折叠时，能够带动柔性屏的弯折区折叠，以使该电子设备处于折叠状态，在该折叠状态，电子设备的体积较小，便于收纳存储；左壳体和右壳体在折叠装置的驱动下展开时，带动柔性屏的弯折区展开，以使该电子设备处于展开状态，在该展开状态，电子设备的显示屏较大，能够提高用户的使用体验。在该折叠式电子设备中，柔性屏的可靠性和使用寿命影响整个电子设备的性能和使用寿命。
该柔性屏的背面通常设置有保护部件，通过该保护部件保护柔性屏，电子设备折叠时，保护部件的弯折区弯折形成用于容纳柔性屏的容屏空间。当保护部件的弯折区弯曲刚度过大时，导致保护部件弯折过程中的变形量过小，弯折后的容屏空间半径过小，无法为柔性屏提供足够的容屏空间，且在折叠位置处会对柔性屏造成拉扯或挤压，导致柔性屏产生折痕甚至断裂等不良现象。
申请内容
本申请提供了一种显示组件及折叠式电子设备，该显示组件可以减少弯折区屏幕层叠分层、断裂的风险。
本申请第一方面提供一种显示组件，用于折叠式电子设备，所述显示组件包括：柔性屏；保护部件，所述保护部件沿第一方向与所述柔性屏连接；其中，所述保护部件的弯折区包括第一区域和第二区域，沿第二方向，所述第二区域位于所述第一区域的两侧；所述显示组件弯折时，沿第二方向，所述第一区域的平均变形量小于所述第二区域的平均变形量。在相同的外力作用下，第一区域的变形量小于第二区域的变形量，从而降低第一区域在折叠过程中因变形量过大而导致形成的容屏空间的半径过小的风险，增大弯折区变形后的弯折半径，进而降低保护部件对柔性屏的挤压，减小柔 性屏发生层叠分层、断裂的风险，提高显示组件的使用寿命和可靠性。
在一种可能的设计中，所述显示组件弯折时，所述第一区域的弯曲刚度大于所述第二区域的弯曲刚度。其中，保护部件的弯曲刚度具体为沿第二方向的弯曲刚度，弯曲刚度和弯折后保护部件的半径成正比例关系。此外，保护部件弯折时的变形量和弯曲刚度有相反的变化关系，即相同的弯矩作用下，对于同一材料，变形量越大，弯曲刚度越小。由于保护部件的弯折区的第一区域在显示组件处于折叠状态时的变形量最大，当沿第二方向第一区域的弯曲刚度大于第二区域的弯曲刚度时，在相同的外力作用下，第一区域的变形量小于第二区域的变形量，从而降低第一区域在折叠过程中因变形量过大而导致形成的容屏空间的半径过小的风险，增大弯折区变形后的弯折半径，进而降低保护部件对柔性屏的挤压作用下，减小柔性屏发生层叠分层、断裂的风险，提高显示组件的使用寿命和可靠性。
在一种可能的设计中，所述弯折区设置有多个沿第一方向凹陷的凹陷部，且多个所述凹陷部沿第二方向和第三方向间隔分布。凹陷部的设置减小了保护部件在弯折过程中承受应力的截面积，从而减小弯折区的弯曲刚度，使得保护部件的弯折区在折叠过程中能够产生较大变形，从而形成用于容纳柔性屏的折叠部分的容屏空间，从而有助于实现电子设备的折叠，且各凹陷部能够减小保护部件对柔性屏的折叠部分的挤压，降低柔性屏发生层叠分层、断裂的风险。
在一种可能的设计中，在第三方向和第二方向所在平面，所述第一区域的面积为S1，位于所述第一区域的所述凹陷部的总面积为S2，1/4≤S2/S1≤2/3。其中，若S2/S1过小，则第一区域内设置的凹陷部的面积过小，导致第一区域的弯曲刚度较大，显示组件折叠时第一区域弯折后的变形量较小，保护部件不能为柔性屏提供足够的容屏空间，存在挤压柔性屏的折叠部分的风险。若S2/S1过大，则第一区域内设置的凹陷部的面积过大，导致保护部件的强度降低，在折叠过程中容易发生断裂，降低显示组件的使用寿命。
在一种可能的设计中，在第三方向和第二方向所在平面，所述第二区域的面积为S3，位于所述第二区域的所述凹陷部的总面积为S4，1/3≤S4/S3≤2/3。其中，若S4/S3过小，则第二区域内设置的凹陷部的面积过小，导致第二区域的弯曲刚度较大，显示组件折叠时第二区域弯折后的变形量较小，保护部件不能为柔性屏提供足够的容屏空间，存在挤压柔性屏的折叠部分的风险。若S4/S3过大，则第二区域内设置的凹陷部的面积过大，导致保护部件的强度降低，在折叠过程中容易发生断裂，降低显示组件的使用寿命。
在一种可能的设计中，在第三方向和第二方向所在平面，位于所述第一区域的所述凹陷部的总面积为S2，位于所述第二区域的所述凹陷部的总面积为S4，3/4≤S2/S4＜1。其中，若S2/S4过大，则第一区域的凹陷部的总面积大于第二区域的凹陷部的总面积，使得第一区域的弯曲刚度小于第二区域的弯曲刚度，导致弯折区的弯折形状趋向椭圆形，第一区域的弯折半径过小，存在挤压柔性屏的折叠部分的风险；若S2/S4过小，则第一区域的凹陷部的总面积小于第二区域的凹陷部的总面积，且二者的凹陷部的总面积的差值较大，导致第一区域的弯曲刚度远大于第二区域的弯曲刚度，导致第一区域在弯折过程中的变形量过小，同样存在挤压柔性屏的折叠部分的风险。因此， 当3/4≤S2/S4＜1时，能够有效降低保护部件弯折过程中挤压柔性屏的风险。在一种可能的设计中，当第一区域的凹陷部的长度与第二区域的凹陷部的长度相同、第一区域的凹陷部的宽度与第二区域的凹陷部的宽度相同时，所述第一区域的所述凹陷部的深度t1小于所述第二区域的所述凹陷部的深度t2。凹陷部的深度越小，凹陷部的底壁的厚度越大，且该凹陷部的底壁能够用于承受保护部件弯折过程中的应力，因此，凹陷部的底壁的厚度越大，保护部件承受应力的截面积越大，保护部件在相应区域的弯曲刚度越大，弯折时变形量越小。当t1＜t2时，使得保护部件的第一区域的弯曲刚度大于保护部件的第二区域的弯曲刚度。
在一种可能的设计中，位于所述第一区域的所述凹陷部为凹槽，位于所述第二区域的所述凹陷部为沿第一方向贯穿所述保护部件的通孔。此时，凹陷部的深度达到最大，与第一区域相比，能够进一步减小第二区域的弯曲刚度，从而使得第一区域的弯曲刚度与第二区域的弯曲刚度之间的差值更大，显示组件折叠过程中，既保证了保护部件在弯折时有较大的变形程度，从而能够形成足够的容屏空间，又使弯折区的弯折形状趋向圆形，减小弯折区对柔性屏的折叠部分的挤压。
在一种可能的设计中，所述第一区域的相邻所述凹陷部之间沿第二方向具有第一距离A1，所述第二区域的相邻所述凹陷部之间沿第二方向具有第二距离A2，A1＞A2。沿第二方向，相邻凹陷部之间的距离越大，表示该区域内凹陷部的间隔越大，即该区域内未设置凹陷部的材料越多，且由于未设置凹陷部的区域主要用于承受保护部件弯折过程中的应力，当未设置凹陷部的材料越多时，未设置凹陷部的区域的截面积越大，保护部件在相应区域的弯曲刚度越大。因为A1＞A2，所以第一区域的弯曲刚度大于第二区域的弯曲刚度。
在一种可能的设计中，1＜A1/A2≤1.5。若A1/A2过小，第一区域的弯曲刚度小于第二区域的弯曲刚度，导致弯折区的弯折形状趋向椭圆形，第一区域的弯折半径过小，存在挤压柔性屏的折叠部分的风险；若A1/A2过大，第一区域和第二区域的弯曲刚度差较大，导致第一区域在弯折过程中的变形量过小，同样存在挤压柔性屏的折叠部分的风险。因此，1＜A1/A2≤1.5时，在第一区域具有较大的变形量的同时，能够增大第一区域弯折后的弯折半径，从而减小保护部件的弯折区对柔性屏的折叠部分的挤压。
在一种可能的设计中，所述第一区域的所述凹陷部沿第二方向的尺寸为B1，所述第二区域的所述凹陷部沿第二方向的尺寸为B2，B1＜B2。沿第二方向，凹陷部的宽度尺寸越大，该区域内未设置凹陷部的材料越少，且由于未设置凹陷部的区域主要用于承受保护部件弯折过程中的应力，当未设置凹陷部的材料越少时，未设置凹陷部的区域的截面积越小，保护部件在相应区域的弯曲刚度越小。因为B1＜B2，所以第一区域的弯曲刚度大于第二区域的弯曲刚度。
在一种可能的设计中，1＜B2/B1≤1.5。若B2/B1过小，第一区域的弯曲刚度小于第二区域的弯曲刚度，导致弯折区的弯折形状趋向椭圆形，第一区域的弯折半径过小，存在挤压柔性屏的折叠部分的风险；若B2/B1过大，第一区域和第二区域的弯曲刚度差较大，导致第一区域在弯折过程中的变形量过小，同样存在挤压柔性屏的折叠部分的风险。因此，1＜B2/B1≤1.5时，在第一区域具有较大的变形量的同时，能够 增大第一区域弯折后的弯折半径，从而减小保护部件的弯折区对柔性屏的折叠部分的挤压。
在一种可能的设计中，所述第一区域的所述凹陷部沿第三方向的尺寸为C1，所述第二区域的所述凹陷部沿第三方向的尺寸为C2，C1＜C2。沿第三方向，凹陷部的长度尺寸越大，该区域内未设置凹陷部的材料越少，保护部件在相应区域的弯曲刚度越小。因为C1＜C2，所以第一区域的弯曲刚度大于第二区域的弯曲刚度。
在一种可能的设计中，1＜C2/C1≤1.5。当C2/C1的数值过小时，第二区域的弯曲刚度会大于第一区域的弯曲刚度，导致弯折区的弯折形状会趋向椭圆形，第一区域的弯折半径过小，存在挤压柔性屏的折叠部分的风险；当C2/C1的数值过大时，第二区域与第一区域的弯曲刚度差较大，导致第一区域在弯折过程中的变形量过小，同样存在挤压柔性屏的折叠部分的风险。因此，1＜C2/C1≤1.5时，在第一区域具有较大的变形量的同时，能够增大第一区域弯折后的弯折半径，从而减小保护部件的弯折区对柔性屏的折叠部分的挤压。
在一种可能的设计中，所述第一区域的相邻所述凹陷部之间沿第三方向具有第三距离A3，所述第二区域的相邻所述凹陷部之间沿第三方向具有第四距离A4，A3＞A4。沿第三方向，相邻凹陷部之间的距离越大，该区域内未设置凹陷部的材料越多，保护部件在相应区域的弯曲刚度越大。因为A3＞A4，所以第一区域的弯曲刚度大于第二区域的弯曲刚度。
在一种可能的设计中，1＜A3/A4≤1.5。若A3/A4过小，第一区域的弯曲刚度小于第二区域的弯曲刚度，导致弯折区的弯折形状趋向椭圆形，第一区域的弯折半径过小，存在挤压柔性屏的折叠部分的风险；若A3/A4过大，第一区域和第二区域的弯曲刚度差较大，导致第一区域在弯折过程中的变形量过小，同样存在挤压柔性屏的折叠部分的风险。因此，1＜A3/A4≤1.5时，在第一区域具有较大的变形量的同时，能够增大第一区域弯折后的弯折半径，从而减小保护部件的弯折区对柔性屏的折叠部分的挤压。
在一种可能的设计中，所述第二区域沿第一方向至少包括相互堆叠的第一层和第二层，所述第一区域包括第三层，且所述第三层的厚度与所述第一层和所述第二层的厚度之和相同；所述第一层和所述第三层的材料的弹性模量大于所述第二层的材料的弹性模量。即第一区域的整体弹性模量大于第二区域整体的弹性模量。截面积相同时，弹性模量越大，弯曲刚度越大，形变程度越小，因此第一区域的弯曲刚度大于第二区域的弯曲刚度，从而降低第一区域在折叠过程中因变形量过大而导致形成的容屏空间的半径过小的风险。
在一种可能的设计中，所述第一区域的宽度为D1，所述保护部件的弯折区的宽度为D2，1/2≤D1/D2≤2/3。当D1/D2的数值过大时，第一区域沿第二方向的尺寸过大，而第一区域的弯曲刚度大于第二区域的弯曲刚度，即该弯折区中，弯曲刚度较大的区域占比过大，导致弯折区在折叠过程中整体变形量过小，从而导致弯折区不能为柔性屏的折叠部分提供足够的容屏空间，并增加显示组件的弯折难度；当D1/D2的数值过小时，第一区域沿第二方向的尺寸过小，而第一区域的弯曲刚度大于第二区域的弯曲刚度，即该弯折区中，弯曲刚度较大的第一区域占比过小，导致该第一区域在折 叠过程中无法提供有效支撑，从而无法有效增大弯折区的弯折半径，对柔性屏造成挤压。
在一种可能的设计中，沿第一方向，所述第二区域的至少部分的厚度小于所述第一区域的厚度，即第二区域具有减薄区。由于减薄区的设置，第二区域用于承受保护部件弯折过程中的应力的材料少于第一区域，从而实现第二区域的弯曲刚度小于第一区域的弯曲刚度。
本申请第二方面提供了一种折叠式电子设备，所述折叠式电子设备包括：壳体；显示组件，所述显示组件为上述任一项所述的显示组件；其中，所述显示组件安装于所述壳体。壳体包括第一壳体和第二壳体。在展开状态，第一壳体和第二壳体大致位于同一平面，从而使得柔性屏大致为平面，此时，柔性屏裸露，用户能够操作柔性屏，且柔性屏能够显示图像或视频等信息，以实现大屏显示，提高用户的观看体验。在该折叠状态，柔性屏位于第一壳体和第二壳体折叠后围成的空间内，此时，柔性屏不裸露，用户无法操作柔性屏，电子设备便于收纳和携带。
应当理解的是，以上的一般描述和后文的细节描述仅是示例性的，并不能限制本申请。
附图说明
图1为现有技术中折叠式电子设备的部分结构示意图；
图2为图1中的显示组件在展开状态下的结构示意图；
图3为图2的显示组件在展开状态下拉伸的效果图；
图4为图2的显示组件在弯折状态下的结构示意图；
图5为本申请所提供显示组件在一种具体实施例中的结构示意图，其中，显示组件处于展开状态；
图6为图5的仰视图；
图7为图5中保护部件的弯折区的结构示意图；
图8为图5的显示组件在弯折状态下的结构示意图；
图9为本申请所提供显示组件在第二种具体实施例中的结构示意图，其中，显示组件处于展开状态；
图10为图9的仰视图；
图11为图9中保护部件的弯折区的结构示意图；
图12为图9的显示组件在弯折状态下的结构示意图；
图13为本申请所提供显示组件在第三种具体实施例中的结构示意图，其中，显示组件处于展开状态；
图14为图13的仰视图；
图15为图13中保护部件的弯折区的结构示意图；
图16为本申请所提供显示组件在第四、五种具体实施例中的结构示意图，其中，显示组件处于展开状态；
图17为图16的显示组件的弯折区的结构示意图；
图18为本申请所提供显示组件在第六种具体实施例中的结构示意图，其中，显示组件处于展开状态；
图19为本申请所提供显示组件在第七种具体实施例中的结构示意图，其中，显示组件处于展开状态；
图20为图19的仰视图；
图21为本申请所提供显示组件在弯折状态下的结构示意图，其中显示组件呈球棒状；
图22为本申请所提供显示组件在展开状态下第一区域的局部放大图，其中保护部件上的凹陷部两端为圆形；
图23为本申请所提供显示组件在展开状态下第一区域的局部放大图，其中保护部件上的凹陷部为不规则形状。
附图标记：
1a-保护部件；
11a-凹陷部；
12a-第一区域；
13a-驱动部件；
14a-安装部件；
15a-电路板；
2a-柔性屏；
1-保护部件；
11-凹陷部；
111-通孔；
112-凹槽；
12-第一区域；
13-第二区域；
14-外侧区；
15-第一层；
16-第二层；
17-第三层；
18-减薄区；
2-柔性屏；
21-第一部分；
22-第二部分；
23-折叠部分；
231-第一折叠部分；
232-第二折叠部分。
此处的附图被并入说明书中并构成本说明书的一部分，示出了符合本申请的实施例，并与说明书一起用于解释本申请的原理。
具体实施方式
为了更好的理解本申请的技术方案，下面结合附图对本申请实施例进行详细描述。
如图1所示，图1为折叠式电子设备的部分结构示意图，该折叠式电子设备包括显示组件、驱动芯片13a(drive IC)、安装部件14a、电路板15a等，其中，显示组件包括可折叠的柔性屏2a和用于保护柔性屏2a的保护部件1a，安装部件14a可以通过塑料-芯片封装(chip on plastic，COP)或其他封装方式将柔性屏2a安装于保护部件1a上，驱动芯片13a与电路板15a、柔性屏2a电连接，用于驱动柔性屏2a显示，电路板15a可以为柔性印刷电路板(flexible printed circuit board，FPC)。
其中，图1中的显示组件在展开状态下的结构如图2所示，折叠式电子设备折叠过程中，保护部件1a与柔性屏2a均折叠，且保护部件1a的弯折区折叠后形成用于容纳柔性屏2a的折叠区的容屏空间，为了增加保护部件1a的弯折区的变形量以增大容屏空间，通常在保护部件1a的弯折区刻蚀加工凹陷部11a，从而减小弯折区的弯曲刚度，使得保护部件1a在弯折过程中发生较大的变形，进而在一定程度上增大容屏空间，减小保护部件1a的弯折区对柔性屏2a的拉扯和挤压。
如图3所示，图3为图1的显示组件在展开状态下拉伸的效果图，沿宽度方向拉伸保护部件1a，凹陷部11a发生变形、体积增大，相应的当保护部件1a弯折时，凹陷部11a的体积也随之增大，为弯折的柔性屏2a提供容屏空间，减小保护部件1a的弯折区对柔性屏2a的拉扯和挤压。
其中，柔性屏2a的弯折区和保护部件1a的弯折区通常弯折成圆弧形结构，且保护部件1a的弯折区弯折后形成的圆弧形结构的半径越小，容屏空间越小，对柔性屏2a的挤压越大，因此，为了减小保护部件1a对柔性屏2a的挤压，应使得保护部件1a弯折后的圆弧形结构的半径较大。
如图4所示，图4为图1的显示组件在弯折状态下的结构示意图，其中，虚线示出的是保护部件1a的弯折区的第一区域12a在弯折过程中的理想状态。该保护部件1a的弯折区的第一区域12a在折叠状态时的变形量最大，且当第一区域12a的变形量过大时(弯折过大)时，导致形成的圆弧形结构的半径过小，即第一区域12a实际弯折后的半径小于虚线所示的理想半径，弯折后的形状往往呈椭圆形(与理想状态弯折后的形状呈圆弧形不同)，导致对柔性屏2a的挤压过大，柔性屏2a存在层叠分层、断裂的风险。
为了解决该技术问题，本申请实施例提供一种折叠式电子设备，该折叠式电子设备包括例如手机、平板电脑、个人数字助理(personal digital assistant，PDA)、笔记本电脑、车载电脑、可折叠显示设备、可折叠显示屏、可穿戴设备等任何具有可折叠屏幕功能的设备。本申请实施例对上述折叠式电子设备的具体形式不做特殊限制，以下为了方便说明，是以折叠式电子设备为手机为例进行的说明，下面以具体实施例介绍本申请的折叠式电子设备。
折叠式电子设备包括折叠装置、第一壳体、第二壳体和显示组件，其中，该显示组件包括柔性屏，该柔性屏用于显示图像、视频等。本申请的柔性屏的具体类型不做限制，示例性的，柔性屏可以是有源矩阵有机发光二极体或主动矩阵有机发光二极体 (active-matrix organic light-emitting diode，AMOLED)显示屏，AMOLED显示屏作为一种自发光显示屏，无需设置背光模组(back light module，BLM)。因此，当AMOLED显示屏中的衬底基板采用柔性树脂材料，例如聚对苯二甲酸乙二醇酯(polyethylene terephthalate，PET)构成时，AMOLED显示屏能够具有可弯折的特性。示例性的，柔性屏2还可以是有机发光二极管(organic light-emitting diode，OLED)显示屏，迷你发光二极管(mini organic lightemitting diode)显示屏、微型发光二极管(micro organic light-emitting diode)显示屏、微型有机发光二极管(micro organic light-emitting diode)显示屏、量子点发光二极管(quantum dot light emitting diodes，QLED)显示屏等。
其中，第一壳体(图中未示出)和第二壳体(图中未示出)间隔分布，且该第一壳体和第二壳体还可以为折叠式电子设备的中框结构，该第一壳体和第二壳体用于安装电子设备的电池、电路板、摄像头、耳机、听筒、按键、电池等部件，且该第一壳体和第二壳体还用于承载柔性屏，即柔性屏固定连接(例如粘贴)于该第一壳体和第二壳体，使得柔性屏在使用过程中尽量保持平整，并对柔性屏的非显示面进行保护。折叠装置(图中未示出)位于第一壳体与第二壳体之间，并与第一壳体和第二壳体连接。
折叠式电子设备使用过程中，显示组件至少包括图6所示的展开状态和图8所示的折叠状态，在该展开状态，第一壳体和第二壳体大致位于同一平面，从而使得柔性屏2大致为平面，此时，柔性屏2裸露，用户能够操作柔性屏2，且柔性屏2能够显示图像或视频等信息，以实现大屏显示，提高用户的观看体验。且当显示组件处于展开状态时，该第一壳体和第二壳体能够相向转动(即第一壳体与第二壳体相互靠近的相对转动)，从而带动显示组件折叠，使得显示组件处于图8所示的折叠状态，且该实施例中的显示组件为柔性屏2内折结构。在该折叠状态，柔性屏2位于第一壳体和第二壳体折叠后围成的空间内，此时，柔性屏2不裸露，用户无法操作柔性屏2，电子设备便于收纳和携带。且当该显示组件处于折叠状态时，第一壳体和第二壳体能够转动(转动方向与折叠时的转动方向相反)，从而使得显示组件处于图6所示的展开状态。
如图5所示，图5为本实施例所提供显示组件的结构示意图，该柔性屏2可以包括第一部分21、第二部分22和位于二者之间的折叠部分23，其中，第一部分21与第一壳体对应并连接，第二部分22与第二壳体对应并连接，该折叠部分23与折叠装置对应，折叠装置折叠过程中，该折叠部分23被折叠，形成如图8所示的柔性屏2的折叠部分23。其中，本申请实施例中，以第一方向Z为保护部件1的厚度方向、第二方向X为保护部件1的宽度方向、第三方向Y为保护部件1的长度方向为例描述。
如图5所示，该显示组件还包括保护部件1，该保护部件1位于柔性屏2远离显示面的一侧，用于保护柔性屏2，当显示组件弯折时，保护部件1与柔性屏2均弯折，且保护部件1的弯折区与柔性屏2的折叠部分23相对应，且保护部件1的弯折区弯折后形成用于容纳柔性屏2的折叠部分23的容屏空间。
如图6所示，图6为图5的仰视图，该保护部件1的弯折区包括第一区域12和第二区域13，沿第二方向X，第二区域13位于第一区域12的两侧；显示组件弯折时，沿第二方向X，第一区域12的平均变形量小于第二区域13的平均变形量。其中，本 申请实施例所述的第一区域12的平均变形量定义为：显示组件弯折后，第一区域12沿保护部件1的第二方向X的单位长度的变形量；本申请实施例所述的第二区域13的平均变形量定义为：显示组件弯折后，第二区域13沿保护部件1的第二方向X的单位长度的变形量。
本实施例中，该保护部件1的弯折区在显示组件处于折叠状态时形成用于容纳柔性屏2的折叠部分23的容屏空间，在相同的外力作用下，第一区域12的平均变形量小于第二区域13的平均变形量，从而降低第一区域12在折叠过程中因平均变形量过大而导致形成的容屏空间的半径过小的风险，增大弯折区变形后的弯折半径，进而降低保护部件1对柔性屏2的挤压作用下，减小柔性屏2发生层叠分层、断裂的风险，提高显示组件的使用寿命和可靠性。
在一种具体实施例中，显示组件弯折时，第一区域12的弯曲刚度大于第二区域13的弯曲刚度。其中，本文中所述的弯曲刚度具体为沿第二方向X的弯曲刚度，弯曲刚度和弯折后保护部件1的半径成正比例关系，具体为：
1/ρ＝M/(EI)
其中，ρ为弯折后保护部件1的弯折区的半径，M为保护部件1受到的最大弯矩，EI为保护部件1的截面弯曲刚度。此外，保护部件1弯折时的变形量和弯曲刚度有相反的变化关系，即相同的弯矩作用下，对于同一材料，变形量越大，弯曲刚度越小。当显示组件处于如图5和图6所示的展开状态时，柔性屏2的第一部分21、折叠部分23和第二部分22的布置方向定义为第二方向X(图5、6中呈现为左右方向)；在柔性屏2(展开状态)所在的平面内，与第一部分21、折叠部分23和第二部分22的布置方向垂直的方向定义为第三方向Y(图6中呈现为上下方向)；与上述第二方向X和第三方向Y均垂直的方向定义为第一方向Z(图5中呈现为上下方向)。
本实施例中，该保护部件1的弯折区在显示组件处于折叠状态时形成用于容纳柔性屏2的折叠部分23的容屏空间，且由于保护部件1的弯折区的第一区域12在显示组件处于折叠状态时的变形量最大，当沿第二方向X，第一区域12的弯曲刚度大于第二区域13的弯曲刚度时，在相同的外力作用下，第一区域12的变形量小于第二区域13的变形量，从而降低第一区域12在折叠过程中因变形量过大而导致形成的容屏空间的半径过小的风险，增大弯折区变形后的弯折半径，进而降低保护部件1对柔性屏2的挤压作用下，减小柔性屏2发生层叠分层、断裂的风险，提高显示组件的使用寿命和可靠性。
其中，保护部件1具体可以为金属片，且该保护部件1可以粘贴于柔性屏2沿第一方向Z背离显示端的一侧，从而通过该保护部件1保护柔性屏2。
以上各实施例中，保护部件1的弯折区中弯曲刚度不同的第一区域12和第二区域13具体可以通过多种方式实现，以下具体描述弯曲刚度不同的第一区域12和第二区域13的不同实现方式。
具体地，如图5、图9、图13和图18所示，图9、图13、图18均为本申请所提供显示组件在不同的具体实施例中的结构示意图，保护部件1的弯折区设置有多个沿第一方向Z凹陷的凹陷部11，且多个凹陷部11沿第二方向X和第三方向Y间隔分布。凹陷部11的设置减小了保护部件1在弯折过程中承受应力的截面积，从而减小弯折 区的弯曲刚度，使得保护部件1的弯折区在折叠过程中能够产生较大变形，从而形成用于容纳柔性屏2的折叠部分23的容屏空间，从而有助于实现电子设备的折叠，且各凹陷部11能够减小保护部件1对柔性屏2的折叠部分23的挤压，降低柔性屏2发生层叠分层、断裂的风险，同时，在保护部件1设置凹陷部11时，还能够便于通过改变凹陷部11的尺寸实现弯曲刚度不同的第一区域12和第二区域13。
在具体的实施例中，在第三方向Y和第二方向X所在平面，第一区域12的面积为S1，位于第一区域12的凹陷部11的总面积为S2，1/4≤S2/S1≤2/3。例如，S2/S1具体可以为1/4，3/8，1/2，2/3等。
其中，位于第一区域12的凹陷部11的总面积S2和第一区域12的面积S1的比值不应过大也不应过小。若S2/S1过小(例如小于1/4)，则第一区域12内设置的凹陷部11的面积过小，导致第一区域12的弯曲刚度较大，显示组件折叠时第一区域12弯折后的变形量较小，保护部件1不能为柔性屏2提供足够的容屏空间，存在挤压柔性屏2的折叠部分23的风险。若S2/S1过大(例如大于2/3)，则第一区域12内设置的凹陷部11的面积过大，导致保护部件1的强度降低，在折叠过程中容易发生断裂，降低显示组件的使用寿命。
在具体的实施例中，在第三方向Y和第二方向X所在平面，第二区域13的面积为S3，位于第二区域13的凹陷部11的总面积为S4，1/3≤S4/S3≤2/3。例如，S4/S3具体可以为1/3、3/8、1/2，2/3等。
其中，位于第二区域13的凹陷部11的总面积S4和第二区域13的面积S3的比值不应过大也不应过小。若S4/S3过小(例如小于1/3)，则第二区域13内设置的凹陷部11的面积过小，导致第二区域13的弯曲刚度较大，显示组件折叠时第二区域13弯折后的变形量较小，保护部件1不能为柔性屏2提供足够的容屏空间，存在挤压柔性屏2的折叠部分23的风险。若S4/S3过大(例如大于2/3)，则第二区域13内设置的凹陷部11的面积过大，导致保护部件1的强度降低，在折叠过程中容易发生断裂，降低显示组件的使用寿命。
同时，3/4≤S2/S4＜1。例如，S2/S4具体可以为3/4、1/2、5/8等。其中，沿第一方向，第一区域12的凹陷部11的深度与第二区域13的凹陷部11的深度相同。
其中，位于第一区域12的凹陷部11的总面积S2与第一区域12的弯曲刚度有关，位于第二区域13的凹陷部11的总面积S4与第一区域12的弯曲刚度有关，且S2越大，第一区域12的弯曲刚度越小，S4越大，第二区域13的弯曲刚度越大，因此，S2/S4的大小能够表示第一区域12的弯曲刚度与第二区域13的弯曲刚度的大小。若S2/S4过大(例如大于1)，则第一区域12的凹陷部11的总面积大于第二区域13的凹陷部11的总面积，使得第一区域12的弯曲刚度小于第二区域13的弯曲刚度，导致弯折区的弯折形状趋向椭圆形，第一区域12的弯折半径过小，存在挤压柔性屏2的折叠部分23的风险；若S2/S4过小(例如小于3/4)，则第一区域12的凹陷部11的总面积小于第二区域13的凹陷部11的总面积，且二者的凹陷部11的总面积的差值较大，导致第一区域12的弯曲刚度远大于第二区域13的弯曲刚度，导致第一区域12在弯折过程中的变形量过小，同样存在挤压柔性屏2的折叠部分23的风险。因此，当3/4≤S2/S4＜1时，能够有效降低保护部件1弯折过程中挤压柔性屏2的风险。
在一种具体的实施例中，如图7所示，图7为图5中保护部件1的弯折区的结构示意图，当第一区域12的凹陷部11的长度与第二区域13的凹陷部11的长度相同、第一区域12的凹陷部11的宽度与第二区域13的凹陷部11的宽度相同时，第一区域12的凹陷部11的深度t1小于第二区域13的凹陷部11的深度t2。
本实施例中，凹陷部11的深度越小，凹陷部11的底壁的厚度越大，且该凹陷部11的底壁能够用于承受保护部件1弯折过程中的应力，因此，凹陷部11的底壁的厚度越大，保护部件1承受应力的截面积越大，保护部件1在相应区域的弯曲刚度越大，弯折时的变形量越小。当第一区域12的凹陷部11的深度t1小于第二区域13的凹陷部11的深度t2时，使得保护部件1的第一区域12的弯曲刚度大于保护部件1的第二区域13的弯曲刚度，从而在保护部件1受到的外力相同时，第一区域12的变形量小于第二区域13的变形量。本实施例中，通过改变不同区域的凹陷部11的深度，能够方便地实现弯曲刚度不同的第一区域12和第二区域13，简化保护部件1的结构。
可选地，第一区域12的凹陷部11的深度t1向第二区域13的凹陷部11的深度t2的变化可以设置为渐变形式，即沿第二方向X，凹陷部11的深度从第一区域12的中心向第二区域13远离第一区域12的两侧逐渐增加，从而使保护部件1的弯曲刚度变化较为平缓，减小弯折时第一区域12和第二区域13因弯折半径突变引起的应力集中，从而增加保护部件1的使用寿命。
具体地，如图7所示的实施例中，位于第一区域12的凹陷部11为凹槽112，位于第二区域13的凹陷部11为通孔111，即位于第二区域13的凹陷部11沿第一方向Z贯穿保护部件1，位于第一区域12的凹陷部11未贯穿保护部件1。
本实施例中，当第二区域13的凹陷部11为通孔111时，凹陷部11的深度达到最大，与第一区域12相比，能够进一步减小第二区域13的弯曲刚度，从而使得第一区域12的弯曲刚度与第二区域13的弯曲刚度之间的差值更大，显示组件折叠过程中，既保证了保护部件1在弯折时有较大的变形程度，从而能够形成足够的容屏空间，又使弯折区的弯折形状趋向圆形，减小弯折区对柔性屏2的折叠部分23的挤压。另外，当第二区域13的凹陷部11为通孔111时，还能够简化保护部件1的加工，降低加工精度。
在第二种具体的实施例中，如图9～11所示，图9为显示组件在第二种具体实施例中的结构示意图，图10为图9的仰视图，图11为保护部件1的弯折区的结构示意图，第一区域12的相邻凹陷部11之间沿第二方向X具有第一距离A1，第二区域13的相邻凹陷部11之间沿第二方向X具有第二距离A2，A1＞A2。其中，A1、A2为保护部件1上相邻凹陷部11之间沿保护部件1的第二方向X的最小距离。
在本实施例中，沿第二方向X，相邻凹陷部11之间的距离越大，表示该区域内凹陷部11的间隔越大，即该区域内未设置凹陷部11的材料越多，且由于未设置凹陷部11的区域主要用于承受保护部件1弯折过程中的应力，当未设置凹陷部11的材料越多时，未设置凹陷部11的区域的截面积越大，保护部件1在相应区域的弯曲刚度越大。因为第一距离A1大于第二距离A2，所以第一区域12的弯曲刚度大于第二区域13的弯曲刚度。本实施例中，通过改变保护部件1的第一区域12和第二区域13中凹陷部11沿第二方向X的间距，能够方便地实现第一区域12的弯曲刚度大于第二 区域13的弯曲刚度，简化保护部件1的结构。
具体地，1＜A1/A2≤1.5。例如，A1/A2具体可以为1.2、1.3、1.4、1.5等。
其中，第一距离A1和第二距离A2的比值不应过大也不应过小，若A1/A2过小(例如小于1)，第一区域12的弯曲刚度小于第二区域13的弯曲刚度，导致弯折区的弯折形状趋向椭圆形，第一区域12的弯折半径过小，存在挤压柔性屏2的折叠部分23的风险；若A1/A2过大(例如大于1.5)，第一区域12和第二区域13的弯曲刚度差较大，导致第一区域12在弯折过程中的变形量过小，同样存在挤压柔性屏2的折叠部分23的风险。因此，1＜A1/A2≤1.5时，在第一区域12具有较大的变形量的同时，能够增大第一区域12弯折后的弯折半径，从而减小保护部件1的弯折区对柔性屏2的折叠部分23的挤压。在第三种具体的实施例中，如图13～15所示，图13为显示组件在第三种具体实施例中的结构示意图，图14为图13的仰视图，图15为图13中保护部件1的弯折区的结构示意图，第一区域12的凹陷部11沿第二方向X的尺寸为B1，第二区域13的凹陷部11沿第二方向X的尺寸为B2，B1＜B2。其中，B1、B2为保护部件1上的凹陷部11沿第二方向X的最大距离。
在本实施例中，沿第二方向X，凹陷部11的宽度尺寸越大，该区域内未设置凹陷部11的材料越少，且由于未设置凹陷部11的区域主要用于承受保护部件1弯折过程中的应力，当未设置凹陷部11的材料越少时，未设置凹陷部11的区域的截面积越小，保护部件1在相应区域的弯曲刚度越小。因为沿保护部件1的第二方向X第一区域12凹陷部11的宽度尺寸B1小于第二区域13凹陷部11的宽度尺寸B2，所以第一区域12的弯曲刚度大于第二区域13的弯曲刚度。本实施例中，通过改变保护部件1的第一区域12和第二区域13中凹陷部11沿第二方向X的尺寸，能够方便地实现第一区域12的弯曲刚度大于第二区域13的弯曲刚度，简化保护部件1的结构，并能够直观地表示两个区域的弯曲刚度的大小。
具体地，1＜B2/B1≤1.5。例如，B2/B1具体可以为1.2、1.3、1.4、1.5等。
其中，沿第二方向X，凹陷部11的宽度尺寸B2/B1的数值不应过大也不应过小，若B2/B1过小(例如小于1)，第一区域12的弯曲刚度小于第二区域13的弯曲刚度，导致弯折区的弯折形状趋向椭圆形，第一区域12的弯折半径过小，存在挤压柔性屏2的折叠部分23的风险；若B2/B1过大(例如大于1.5)，第一区域12和第二区域13的弯曲刚度差较大，导致第一区域12在弯折过程中的变形量过小，同样存在挤压柔性屏2的折叠部分23的风险。因此，1＜B2/B1≤1.5时，在第一区域12具有较大的变形量的同时，能够增大第一区域12弯折后的弯折半径，从而减小保护部件1的弯折区对柔性屏2的折叠部分23的挤压。
在第四种具体的实施例中，如图16和图17所示，图16为显示组件在该实施例中的结构示意图，图17为图16的显示组件的弯折区的结构示意图，其中，显示组件处于展开状态第一区域12的凹陷部11沿第三方向Y的尺寸为C1，第二区域13的凹陷部11沿第三方向Y的尺寸为C2，C1＜C2。其中，C1、C2为保护部件1上的凹陷部11沿第三方向Y的最大距离。
在本实施例中，沿第三方向Y，凹陷部11的长度尺寸越大，该区域内未设置凹陷部11的材料越少，且由于未设置凹陷部11的区域主要用于承受保护部件1弯折过 程中的应力，当未设置凹陷部11的材料越少时，未设置凹陷部11的区域的截面积越小，使得保护部件1在相应区域的弯曲刚度越小。因为沿第三方向Y第一区域12凹陷部11的长度尺寸C1小于第二区域13凹陷部11的长度尺寸C2，所以第一区域12的弯曲刚度大于第二区域13的弯曲刚度。
具体地，1＜C2/C1≤1.5。例如，C2/C1具体可以为1.2、1.3、1.4、1.5等。
其中，沿第三方向Y，凹陷部11的长度尺寸C2/C1的数值不应过大也不应过小，当C2/C1的数值过小时(例如小于1)，第二区域13的弯曲刚度会大于第一区域12的弯曲刚度，导致弯折区的弯折形状会趋向椭圆形，第一区域12的弯折半径过小，存在挤压柔性屏2的折叠部分23的风险；当C2/C1的数值过大时(例如大于1.5)，第二区域13与第一区域12的弯曲刚度差较大，导致第一区域12在弯折过程中的变形量过小，同样存在挤压柔性屏2的折叠部分23的风险。因此，1＜C2/C1≤1.5时，在第一区域12具有较大的变形量的同时，能够增大第一区域12弯折后的弯折半径，从而减小保护部件1的弯折区对柔性屏2的折叠部分23的挤压。
在第五种具体的实施例中，如图16和图17所示，图16为显示组件在本具体实施例中的结构示意图，图17为图16的显示组件的弯折区的结构示意图，第一区域12的相邻凹陷部11之间沿第三方向Y具有第三距离A3，第二区域13的相邻凹陷部11之间沿第三方向Y具有第四距离A4，A3＞A4。其中，A3、A4为保护部件1上相邻凹陷部11之间沿第三方向Y的最小距离。
在本实施例中，沿第三方向Y，相邻凹陷部11之间的距离越大，该区域内未设置凹陷部11的材料越多，且由于未设置凹陷部11的区域主要用于承受保护部件1弯折过程中的应力，当未设置凹陷部11的材料越多时，未设置凹陷部11的区域的截面积越大，使得保护部件1在相应区域的弯曲刚度越大。因为第三距离A3大于第四距离A4，所以第一区域12的弯曲刚度大于第二区域13的弯曲刚度。本实施例中，通过改变保护部件1的第一区域12和第二区域13中凹陷部11沿第三方向Y的间距，能够方便地实现第一区域12的弯曲刚度大于第二区域13的弯曲刚度，简化保护部件1的结构。
具体地，1＜A3/A4≤1.5。例如，A3/A4具体可以为1.2、1.3、1.4、1.5等。
其中，第三距离A3和第四距离A4的比值不应过大也不应过小，若A3/A4过小(例如小于1)，第一区域12的弯曲刚度小于第二区域13的弯曲刚度，导致弯折区的弯折形状趋向椭圆形，第一区域12的弯折半径过小，存在挤压柔性屏2的折叠部分23的风险；若A3/A4过大(例如大于1.5)，第一区域12和第二区域13的弯曲刚度差较大，导致第一区域12在弯折过程中的变形量过小，同样存在挤压柔性屏2的折叠部分23的风险。因此，1＜A3/A4≤1.5时，在第一区域12具有较大的变形量的同时，能够增大第一区域12弯折后的弯折半径，从而减小保护部件1的弯折区对柔性屏2的折叠部分23的挤压。
在第六种具体的实施例中，如图18所示，图18为显示组件在该具体实施例中的结构示意图，其中，显示组件处于展开状态，第二区域13沿第一方向Z至少包括相互堆叠的第一层15和第二层16，第一区域12包括第三层17，沿第一方向Z，第三层17的厚度与第一层15的厚度和第二层16的厚度之和相同，第三层17与第一层15可 以为一体式结构，也可以为分体式结构，且第一层15和第三层17的材料的弹性模量大于第二层16的材料的弹性模量。
在本实施例中，第一区域12包括弹性模量较大的第三层17，第二区域13包括弹性模量较大的第一层15和弹性模量小的第二层16，且沿第一方向Z，第三层17的厚度与第一层15的厚度和第二层16的厚度之和相同，即第一区域12的整体弹性模量大于第二区域13整体的弹性模量。截面积相同时，弹性模量越大，弯曲刚度越大，弯折时的变形量越小，因此第一区域12的弯曲刚度大于第二区域13的弯曲刚度，从而降低第一区域12在折叠过程中因变形量过大而导致形成的容屏空间的半径过小的风险。
其中，本实施例中，该第二区域13中，第一层15和第二层16之间可以粘连。
在第七种具体的实施例中，如图19和图20所示，图19为显示组件在第七种具体实施例中的结构示意图，图20为图19的仰视图，沿第一方向Z，第二区域13的至少部分的厚度小于第一区域12的厚度，即该第二区域13具有减薄区18，该减薄区18的厚度小于第一区域12的厚度，且该第二区域13全部为减薄区18或者部分为减薄区18。
在本实施例中，由于第二区域13设置了减薄区18，第二区域13用于承受保护部件1弯折过程中的应力的材料少于第一区域12，从而实现第二区域13的弯曲刚度小于第一区域12的弯曲刚度。
以上各实施例中，如图6、图10、图14和图16所示，第一区域12的宽度为D1，保护部件1的弯折区的宽度为D2，1/2≤D1/D2≤2/3。例如，D1/D2具体可以为0.5、0.55、0.6等。
其中，如上所述，第一区域12为该弯折区中弯曲刚度较大的部分，因此，D1/D2可以表示该弯折区中弯曲刚度较大的部分在整个弯折区中所占的比例。D1/D2的数值不应过大也不应过小，当D1/D2的数值过大时，第一区域12沿第二方向X的尺寸过大，弯曲刚度即该弯折区中，弯曲刚度较大的区域占比过大，导致弯折区在折叠过程中整体变形量过小，从而导致弯折区不能为柔性屏2的折叠部分23提供足够的容屏空间，并增加显示组件的弯折难度；当D1/D2的数值过小时，第一区域12沿第二方向X的尺寸过小，弯曲刚度即该弯折区中，弯曲刚度较大的第一区域12占比过小，导致该第一区域12在折叠过程中无法有效增大弯折区的弯折半径，对柔性屏2造成挤压。
在一种具体实施例中，如图21所示，该显示组件在折叠后，柔性屏2的折叠部分23被折叠为棒球棒形，从图中可以得知，该柔性屏2的折叠部分23仅通过一次折叠，即保护部件1的弯折区经过一次折叠，此时，弯折区的第一区域12和第二区域13与柔性屏2的折叠部分23对应。
在另一种具体实施例中，如图8和图12所示，该显示组件在折叠后，柔性屏2的折叠部分23被折叠为水滴形，从图中可知，该柔性屏2的折叠部分23通过两侧折叠，即保护部件1的弯折区经过两次折叠。因此，该折叠部分23包括第一折叠部分231和第二折叠部分232，其中，该第一折叠部分231为圆弧形，相应地，保护部件1的弯折区除了包括第一区域12和第二区域13之外，还包括两个外侧区14，两个外侧 区14沿第二方向X位于两个第二区域13远离第一区域12的一侧，且显示组件处于折叠状态时，两个外侧区14与柔性屏2的第二折叠部分232对应。
以上各实施例中，凹陷部11可以为矩形结构等规则形状，也可以为其他形状，例如，如图22和图23所示，图22和图23均为本申请所提供显示组件在展开状态下第一区域12的局部放大图，保护部件1的凹陷部11的两端还可以包括圆弧段或沿第二方向X的尺寸不均匀的形状，从而减小凹陷部11的应力集中，提高保护部件1和显示组件的结构强度。此时，沿第二方向X，图中的第一距离A1为在同一横截面上的相邻凹陷部11之间的最小距离，第五距离A5为沿第二方向X相邻凹陷部11之间的最小距离。
同时，第二区域13的凹陷部11的形状可与第一区域12的凹陷部11的形状保持一致，或者也可以不一致，并使第一区域12的弯曲刚度大于第二区域13的弯曲刚度。
需要指出的是，本专利申请文件的一部分包含受著作权保护的内容。除了对专利局的专利文件或记录的专利文档内容制作副本以外，著作权人保留著作权。

Claims (16)

  1. 一种显示组件，用于折叠式电子设备，其特征在于，所述显示组件包括：
    柔性屏；
    保护部件，沿所述保护部件的第一方向，所述保护部件与所述柔性屏连接；
    其中，所述保护部件的弯折区包括第一区域和第二区域，沿所述保护部件的第二方向，所述第二区域位于所述第一区域的两侧；
    所述显示组件弯折时，沿所述保护部件的第二方向，所述第一区域的平均变形量小于所述第二区域的平均变形量。
  2. 根据权利要求1所述的显示组件，其特征在于，所述弯折区设置有多个沿所述保护部件的第一方向凹陷的凹陷部，且多个所述凹陷部沿所述保护部件的第二方向和所述保护部件的第三方向间隔分布。
  3. 根据权利要求2所述的显示组件，其特征在于，所述第一区域的所述凹陷部的深度t1小于所述第二区域的所述凹陷部的深度t2。
  4. 根据权利要求2所述的显示组件，其特征在于，位于所述第一区域的所述凹陷部为凹槽，位于所述第二区域的所述凹陷部为沿所述保护部件的第一方向贯穿所述保护部件的通孔。
  5. 根据权利要求2所述的显示组件，其特征在于，所述第一区域的相邻所述凹陷部之间沿所述保护部件的第二方向具有第一距离A1，所述第二区域的相邻所述凹陷部之间沿所述保护部件的第二方向具有第二距离A2，A1＞A2。
  6. 根据权利要求5所述的显示组件，其特征在于，1＜A1/A2≤1.5。
  7. 根据权利要求2所述的显示组件，其特征在于，所述第一区域的所述凹陷部沿所述保护部件的第二方向的尺寸为B1，所述第二区域的所述凹陷部沿所述保护部件的第二方向的尺寸为B2，B1＜B2。
  8. 根据权利要求7所述的显示组件，其特征在于，1＜B2/B1≤1.5。
  9. 根据权利要求2所述的显示组件，其特征在于，所述第一区域的所述凹陷部沿所述保护部件的第三方向的尺寸为C1，所述第二区域的所述凹陷部沿所述保护部件的第三方向的尺寸为C2，C1＜C2。
  10. 根据权利要求9所述的显示组件，其特征在于，1＜C2/C1≤1.5。
  11. 根据权利要求2所述的显示组件，其特征在于，所述第一区域的相邻所述凹陷部之间沿所述保护部件的第三方向具有第三距离A3，所述第二区域的相邻所述凹陷部之间沿所述保护部件的第三方向具有第四距离A4，A3＞A4。
  12. 根据权利要求11所述的显示组件，其特征在于，1＜A3/A4≤1.5。
  13. 根据权利要求1所述的显示组件，其特征在于，所述第二区域沿所述保护部件的第一方向至少包括相互堆叠的第一层和第二层，所述第一区域包括第三层，且所述第三层的厚度与所述第一层和所述第二层的厚度之和相同；
    所述第一层和所述第三层的材料的弹性模量大于所述第二层的材料的弹性模量。
  14. 根据权利要求1所述的显示组件，其特征在于，沿所述保护部件的第一方向，所述第二区域的至少部分的厚度小于所述第一区域的厚度。
  15. 根据权利要求1至14中任一项所述的显示组件，其特征在于，所述第一区域的宽度为D1，所述保护部件的弯折区的宽度为D2，1/2≤D1/D2≤2/3。
  16. 一种折叠式电子设备，其特征在于，所述折叠式电子设备包括：
    壳体；
    显示组件，所述显示组件为权利要求1至15中任一项所述的显示组件；
    其中，所述显示组件安装于所述壳体。
PCT/CN2022/115794 2021-09-18 2022-08-30 一种显示组件及折叠式电子设备 Ceased WO2023040652A1 (zh)

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