WO2008018232A1 - Dispositif d'affichage à cristaux liquides et appareil électronique pourvu de celui-ci - Google Patents

Dispositif d'affichage à cristaux liquides et appareil électronique pourvu de celui-ci Download PDF

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Publication number
WO2008018232A1
WO2008018232A1 PCT/JP2007/061982 JP2007061982W WO2008018232A1 WO 2008018232 A1 WO2008018232 A1 WO 2008018232A1 JP 2007061982 W JP2007061982 W JP 2007061982W WO 2008018232 A1 WO2008018232 A1 WO 2008018232A1
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WIPO (PCT)
Prior art keywords
liquid crystal
crystal display
display device
display panel
metal plate
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/JP2007/061982
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English (en)
Japanese (ja)
Inventor
Hideki Ichioka
Tomohiko Yamamoto
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Sharp Corp
Original Assignee
Sharp Corp
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Publication date
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Publication of WO2008018232A1 publication Critical patent/WO2008018232A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/50—Protective arrangements
    • G02F2201/503—Arrangements improving the resistance to shock

Definitions

  • Liquid crystal display device and electronic device equipped with the same
  • the present invention relates to a liquid crystal display device suitable as a display unit of a portable electronic device or a stationary electronic device, and an electronic device including the same, and more specifically, for example, for a thin liquid crystal display device It relates to strength enhancement. Furthermore, the present invention relates to strength enhancement during transportation or handling in a stationary electronic device including a large liquid crystal display device such as a liquid crystal TV (television) as an example.
  • liquid crystal display devices are often used as displays (display units) for portable electronic devices (hereinafter referred to as “mopile devices”).
  • the liquid crystal display device includes a liquid crystal display panel.
  • the liquid crystal display panel includes a liquid crystal layer that is narrowed between a pair of transparent substrates that are also made of glass and the like. Since liquid crystal display devices have excellent portability and low power consumption, they are widely used in mobile computer devices such as notebook personal computer displays, personal digital assistants (PDAs) and mobile phones.
  • PDAs personal digital assistants
  • the above mono equipment is required to be thin, light and durable from the viewpoint of portability and convenience.
  • liquid crystal display devices have been commercialized as installation-type large-sized devices such as flat-screen TVs, and their spread is increasing. In recent years, there has been an increasing demand for thinner and lighter products for these installed products. For this reason, a large-sized liquid crystal display device is also required to be thin and lightweight that can sufficiently withstand external pressure applied during transportation, handling, or normal use.
  • the liquid crystal display device employs a structure in which a chassis 107 is formed around the light guide plate 102b as a support member of the light guide plate 102b.
  • the light guide plate 102b has become thinner with the thin and light LCD modules.
  • the casing of the liquid crystal display device is formed of a resin such as PMMA (PolyMethyl Meth Acrylate), and thus is not rigid. Therefore, if there is a step 107a caused by the chassis 107 etc. on the back surface of the light guide plate 102b, the liquid crystal display panel 101 may be locally distorted as shown in FIGS. 15 (a) and 15 (b). Had a structure to be destroyed.
  • liquid crystal modules and mopile devices including the same often have a configuration in which a liquid crystal display panel, a driving circuit for driving a z or other system, a battery, and the like are arranged on the back surface in terms of layout.
  • Various chip parts mounted on the drive circuit have irregularities, and the cover spacer for protecting the external pressure on the various chip parts also has irregularities.
  • the liquid crystal module and the mopile device including the same have a structure in which the liquid crystal display panel is likely to be locally distorted when a load is applied between the irregularities.
  • a structure with a protective plate is designed in order to make it difficult for external force such as impact to be applied to the liquid crystal display panel. Many are used.
  • the protective plate is required to have sufficient rigidity, and a certain gap is formed between the liquid crystal display panel and the protective plate, so that the liquid crystal display panel can be strengthened.
  • the structure is difficult to communicate.
  • measures such as increasing the thickness of the protective plate and Z or gap are necessary. This is not preferable because it goes against the thin and light weight of the final product.
  • a flat information display means is used.
  • An information display device including an upper case and a lower case (not shown) that accommodates the liquid crystal display panel 201, the metal plate 203, and the drive circuit board 204 together with the upper case is proposed.
  • Patent Document 1 Japanese Published Patent Publication “JP 2001-142404 (Publication Date: May 25, 2001)”
  • the metal plate 203 is distorted by the load from above the liquid crystal display panel 201, and the liquid crystal display panel 201 and the light guide plate 202b are also distorted accordingly. Therefore, the liquid crystal display panel 201 is destroyed.
  • the cause for example, it is easy to squeeze even if the metal plate 203 is thin, and there is a step 204a between the metal plate 203 and the drive circuit board 204, so that the liquid crystal display panel 201 or the like is formed at the step 204a. It has the problem of bending.
  • the present invention has been made in view of the above-mentioned conventional problems, and its purpose is to reduce the possibility of damage to the load on the display surface of the liquid crystal display panel and the impact when dropped.
  • An object of the present invention is to provide a liquid crystal display device and an electronic device including the same.
  • a liquid crystal display device of the present invention is a liquid crystal display device including a liquid crystal display panel, a backlight, and a drive circuit board for driving the liquid crystal display panel and the backlight.
  • a rigid plate serving as a rigid material force plate having a plane that is wider than the backlight and has a region is provided between the backlight and the drive circuit board, and at least a pair of the rigid plates is provided.
  • a falling portion protruding toward the substrate side is formed along the end portion.
  • trapezoid and a polygon may be sufficient other than a rectangle and a square.
  • the rigid plate having a plane in a wider area than the backlight is provided between the backlight and the drive circuit board. Therefore, since the entire knock light is supported by the surface of the rigid plate, even if a load is applied from the upper side of the liquid crystal display panel, if the backlight is bent by the corners of the rigid plate, there is no problem. ! /
  • the rigid plate can be a fixed-end supported beam by the presence of the falling portion along this end.
  • the rigid plate has a shape with the above-described falling portion, the moment of inertia of the cross section of the rigid plate is also increased, so that stagnation is reduced. This effect suffices as long as at least a pair of opposing end portions of the rigid plate are provided with falling portions along the end portions.
  • At least a pair of opposite end portions of the rigid plate has a rising portion that protrudes on the opposite side to the drive circuit board side along the end portion. It is preferred to be formed.
  • At least a pair of mutually opposing end portions of the rigid plate is formed with a rising portion protruding along the end portion that protrudes on the side opposite to the drive circuit board side.
  • the moment of inertia of the cross section is increased, itching is reduced.
  • the rigid plate is formed in a rectangular shape.
  • the rectangle means a rectangle or square, or a shape close to a rectangle or square.
  • the liquid crystal display device when the shape of the liquid crystal display device is a general rectangular shape, the liquid crystal display device can reduce the possibility of breakage due to the load on the display surface of the liquid crystal display panel and the impact when dropped. Can be provided.
  • the rigid plate is formed in a rectangular shape! It is preferable that both end portions and rising portions along the end portions are formed at each end portion of the four sides of the rigid plate.
  • the rigid plate is formed in a rectangular shape !, and at each end portion of the four sides of the rigid plate, the falling portion and the falling portion are provided along the end portion. Both rising and protruding parts are formed in the opposite direction! Speak.
  • the rigid plate can be a fixed-end support beam in both the left-right direction and the front-rear direction.
  • the moment of inertia of the cross section also increases. Accordingly, itching is further reduced.
  • the rigid plate is a metal plate.
  • a general metal plate can be easily used as the rigid plate, and the metal plate can easily process the falling portion, so that the cost is low.
  • the metal plate can be used for grounding the liquid crystal display device, and the heat dissipation effect can be added to the heat generated from the drive circuit board and the backlight.
  • the metal plate is made of an aluminum alloy or a magnesium alloy! /.
  • a housing for housing the liquid crystal display panel, the backlight, the rigid plate, and the drive circuit board is provided, and an upper end and a rising edge of the rising portion of the rigid plate are provided. It is preferable that at least one of the lower ends of the descending portions is in contact with the casing.
  • the rigid plate functions as a fixed end support beam, thereby reducing stagnation. be able to.
  • the impact from the front or back surface of the liquid crystal display device can be distributed from the housing to the rigid and rigid plate, which may damage the liquid crystal display device. Is reduced.
  • the liquid crystal display panel, the backlight, and a frame member that integrally supports the rigid plate, the liquid crystal display panel, the backlight, the rigid plate, the drive circuit board, and A housing that houses the frame member, and at least one of an upper end of the rising portion and a lower end of the falling portion of the rigid plate is in contact with at least one of the frame member and the housing. , Prefer to be.
  • the liquid crystal display panel, the knock light, and the rigid plate are integrated as a liquid crystal module. Can be handled in units.
  • the rigid plate functions as a fixed-end support beam. Can be reduced.
  • the impact from the front surface or the back surface of the liquid crystal display device can be distributed from the housing to the highly rigid plate through the frame member, the possibility of damage to the liquid crystal display device is reduced.
  • the backlight has a light guide plate! /.
  • the knocklight can be made thinner.
  • a portable electronic device of the present invention includes the above-described liquid crystal display device.
  • a portable electronic device including a liquid crystal display device that can reduce the possibility of breakage due to a load on the display surface of the liquid crystal display panel and an impact at the time of dropping can be provided.
  • FIG. 1 is a cross-sectional view showing an embodiment of a liquid crystal display device according to the present invention.
  • FIG. 2 is a perspective view showing a portable electronic device equipped with the liquid crystal display device.
  • FIG. 4 is a cross-sectional view showing the state of the liquid crystal display device when the upper side force of the liquid crystal display panel is also heavy.
  • FIG. 5 is a perspective view showing a modification of the metal plate of the liquid crystal display device.
  • FIG. 6 is a perspective view showing another modification of the metal plate of the liquid crystal display device.
  • FIG. 7 (a) is a cross-sectional view showing a configuration when the metal plate, the bezel and the casing of the liquid crystal display device are attached with fixing screws, and (b) is the metal plate and the bezel of the liquid crystal display device. It is a side view which shows the structure in the case of attaching to a housing
  • FIG. 8a] is a cross-sectional view showing another configuration when the metal plate, the bezel, and the housing of the liquid crystal display device are attached with fixing screws.
  • FIG. 8b is a cross-sectional view showing still another configuration when the metal plate, the bezel, and the housing of the liquid crystal display device are attached with fixing screws.
  • FIG. 9 (a) is a cross-sectional view showing a configuration when the metal plate, the bezel, and the casing of the liquid crystal display device are attached with claws, and (b) is a diagram showing the metal plate, the bezel, and the liquid crystal display device. It is a side view which shows the structure in the case of attaching a housing
  • FIG. 10 is a cross-sectional view showing another configuration when the metal plate, the bezel, and the housing of the liquid crystal display device are attached with claws.
  • FIG. 11 (a) is a cross-sectional view showing a configuration in which the metal plate, the bezel and the casing of the liquid crystal display device are attached with an adhesive, and (b) is the metal plate and the bezel of the liquid crystal display device. It is a side view which shows the structure in the case of attaching to a housing
  • FIG. 12A is a cross-sectional view showing a configuration when the metal plate, the bezel, and the housing of the liquid crystal display device are attached using a fixing screw, a claw, and an adhesive.
  • FIG. 12B is a cross-sectional view showing another configuration when the metal plate, the bezel, and the housing of the liquid crystal display device are attached using fixing screws, claws, and an adhesive.
  • FIG. 12c is a cross-sectional view showing still another configuration when the metal plate, the bezel, and the housing of the liquid crystal display device are attached using a fixing screw, a claw, and an adhesive.
  • FIG. 13 is a diagram showing the difference in cross-sectional second moment between a flat plate and an H-structure plate.
  • FIG. 14 is a cross-sectional view showing a configuration of a conventional liquid crystal display device.
  • FIG. 15a is a cross-sectional view showing the liquid crystal display device when a load is also applied to the upper side force of the liquid crystal display panel.
  • FIG. 15b is a cross-sectional view showing the liquid crystal display device damaged by the load.
  • FIG. 16a is a cross-sectional view showing a liquid crystal display device of another configuration when the upper side force load of the liquid crystal display panel is large.
  • FIG. 16b is a cross-sectional view showing the liquid crystal display device damaged by the load.
  • the liquid crystal display device 10 of the present embodiment is provided in a portable electronic device such as a tablet computer.
  • the portable electronic device may be, for example, a notebook personal computer display, a personal digital assistant (PDA) or a mobile phone.
  • the liquid crystal display device 10 may be provided in a stationary electronic device including a large liquid crystal display device such as a liquid crystal TV.
  • FIG. 1 is a cross-sectional view showing the configuration of the liquid crystal display device 10.
  • the liquid crystal display device 10 includes a liquid crystal display panel 1, a knocklight system 2, a metal plate 3, and a drive circuit board 4, which are stacked in order of upper force.
  • a casing 11 is arranged on the outermost side.
  • the liquid crystal display panel 1 has a structure in which two transparent substrates having glass power having electrodes (not shown) are bonded together via liquid crystal, and polarizing plates la'la are bonded to both surfaces thereof. .
  • this liquid crystal display panel 1 by controlling the voltage, the orientation of the liquid crystal is controlled, and the amount of light emitted from the light source 2a disposed on the back surface is controlled to perform display. /!
  • a backlight system 2 as a backlight disposed on the back surface of the liquid crystal display panel 1 includes a light source 2a that is a light emitter such as a fluorescent tube or an LED, and the light of the light source 2a is transmitted to the liquid crystal display panel 1 And a light guide plate 2b for spreading over the entire surface.
  • the light guide plate 2b is not necessarily provided.
  • an optical sheet (not shown) is disposed between the liquid crystal display panel 1 and the light guide plate 2b to uniformly disperse the light from the light guide plate 2b or to increase the light use efficiency. May be.
  • the metal plate 3 is made of a metal material such as an aluminum alloy, a magnesium alloy, a titanium alloy, or SUS (stainless steel), and is formed in a rectangular shape or a substantially rectangular shape. Since metal is a relatively rigid material, it is suitable for metal plate 3. Note that the rectangle includes a square as a concept. In the present invention, not only the metal plate 3 but also other rigid material force such as carbon resin and other hard ceramic material force. May be.
  • the drive circuit board 4 is disposed on the back surface of the metal plate 3 via an insulating sheet (not shown), and includes an integrated circuit, a battery, and the like that drive the liquid crystal display panel 1 and the backlight system 2. It is out.
  • the drive circuit board 4 is mounted on one side, and the flat surface is placed in contact with the back surface of the metal plate 3. In this case, it is preferable to increase the rigidity by screwing the drive circuit board 4 to the metal plate 3 (not shown) and to connect the GND of the drive circuit board 4 to the metal plate 3.
  • the casing 11 may be divided into two, a front casing 11a and a rear casing l ib.
  • a laminate of the liquid crystal display panel 1, knock light system 2, metal plate 3, and drive circuit board 4 is attached to the rear case.
  • the front case 11a and the back case l ib are configured to be openable and closable.
  • an opening for exposing the display unit of the liquid crystal display panel 1 is formed in the front case 11a.
  • the front casing 11a, the metal plate 3, and the rear casing l ib are connected with, for example, screws in a state including an inverter (not shown), a control circuit, and the like.
  • the metal plate 3 is fixed to the front surface case 11a and the back surface case l ib, and the liquid crystal display panel 1, the knocklight system 2, the metal plate 3, the drive circuit in a highly rigid state.
  • the substrate 4, the front case 1 la, and the back case 1 lb are stacked.
  • the liquid crystal display panel 1 since the liquid crystal display panel 1 also has a glass power that is a brittle material, the pressurizing portion thereof is locally distorted and bending stress exceeding an allowable value is applied. When it makes a profit, it leads to destruction.
  • the pressure on the display surface of the liquid crystal display panel 1 is pushed up and pushed up from the drive circuit board 4 when falling by its own weight.
  • the distortion of the liquid crystal module at the time can be reduced with a thin and light weight.
  • the liquid crystal display device 10 is thin and light while eliminating the step on the back surface.
  • the rigidity of the back surface of the liquid crystal display device 10 is increased, and the liquid crystal display panel 1 located on the upper surface of the liquid crystal display device 10 is less likely to be distorted and enables the structure.
  • step 107a is eliminated by eliminating the conventional chassis 107 shown in FIG.
  • the metal plate 3 arranged on the back surface of the liquid crystal display device 10 has a rectangular plate force including a rigid material force having a plane in a wider area than the light guide plate 2b, and a backlight system including the light source 2a. 2 is supported on the flat surface of the metal plate 3. Furthermore, both the falling part 3a and the rising part 3b are formed at the end of the metal plate 3. The rising portion 3b protrudes above the display surface of the liquid crystal display panel 1. Further, the falling part 3 a protrudes below the back surface of the drive circuit board 4. With this structure, it is possible to provide the drive circuit board 4 without forming a step under the light guide plate 2b.
  • the falling part 3a and the rising part 3b may be formed of GFRP (Glass Fiber Reinforced Plastics) or the like as required.
  • the falling portion 3a and the rising portion 3b are arranged along the end portions of the metal plate 3 at opposite ends of the rectangle as shown in FIG. Is provided. Note that there are two pairs of ends as opposed ends. However, the present invention is not limited to this. For example, as shown in FIG. 5, at least a pair of opposite ends of the metal plate 3 have at least falling portions 3a′3a along the ends. It is enough if it is formed.
  • the falling portion 3a and the rising portion 3b are forces formed on the end edge portion of the metal plate 3.
  • the present invention is not necessarily limited to this, as shown in FIG.
  • the metal plate 3 is provided at a position slightly inside from the end edge portion.
  • the falling part 3a and the rising part 3b may be formed along the end part. In other words, it is not always necessary to be completely continuous, but it is almost continuous but partly discontinuous. If you have a minute, you can be in a state.
  • the liquid crystal display panel 1 when the falling portion 3a and the rising portion 3b are arranged at the edge of the metal plate 3, as shown in FIG. 1, the lower end of the falling portion 3a and the rising portion The upper end of the part 3 b is in contact with the casing 11 of the liquid crystal display device 10. For this reason, since the metal plate 3 is supported in a state of being fixed by the casing 11, the driving circuit when the liquid crystal display panel 1 is pressed against the display surface, the liquid crystal display panel 1 is pressed against the back surface, and the weight falls. A structure that is strong against pushing up by the substrate 4 or the like, that is, the liquid crystal display panel 1 is not easily distorted.
  • the arrangement of the falling portion 3a and the rising portion 3b enables the rigidity of the entire bending and twisting to be increased, so that distortion of the liquid crystal display device 10 due to a drop impact can be suppressed. This means that the liquid crystal display panel 1 is difficult to be distorted and broken when the liquid crystal display device 10 falls by its own weight.
  • the falling part 3 a and the rising part 3 b are in contact with each inner part of the housing 11.
  • the impact force is dispersed and propagated from the housing 11 to the metal plate 3 when falling with the display surface facing down or with the back surface facing down.
  • the impact to is suppressed, and further strength improvement is possible.
  • the lower end of the falling portion 3a is brought into contact with the inner portion of the back surface housing ib, while the upper end of the rising portion 3b is brought into contact with the inner portion of the front surface housing 11a.
  • FIGS. 7 (a) and 7 (b) even if a bezel (frame member) 12 is interposed between the casing 11 and the metal plate 3, they are not There is no problem as long as the structure is laminated.
  • the bezel 12 integrally supports the liquid crystal display panel 1, the knocklight system 2, the metal plate 3, and the drive circuit board 4.
  • the bezel 12 supports at least the liquid crystal display panel 1, the knock light system 2, and the metal plate 3 as a unit. At this time, the upper end of the rising portion 3b and the lower end of the falling portion 3a are in contact with at least one of the bezel 12 and the casing 11.
  • the bezel 12 surrounds the outer wall surfaces of the falling part 3a and the rising part 3b, the lower end of the falling part 3a, and the upper end of the rising part 3b. Further, it has a shape circumscribing the falling part 3a and the rising part 3b.
  • the vertical cross section of the outer wall is parallel to the direction in which the liquid crystal display panel 1, the knock light system 2, the metal plate 3, and the drive circuit board 4 are laminated.
  • the metal plate 3 is provided with a bent portion 3c that bends from the lower end of the falling portion 3a along the bottom inner surface of the rear surface housing l ib.
  • the shape of the bezel 12 may be changed according to the shape of the metal plate 3. That is, when the bent portion 3c is formed so as to extend toward the outer side wall of the rear surface housing l ib of the lower end force of the falling portion 3a, the bezel 12 has a bent portion having the same shape as the bent portion 3c. And a shape circumscribing the outer wall surfaces of the falling portion 3a and the rising portion 3b, the upper surface of the bent portion 3c, and the upper end of the rising portion 3b.
  • the rising portion 3b is replaced with a part of the bezel 12, and the thickness of the upper portion of the bezel 12 is increased.
  • the metal plate 3 can also be deformed so that the rising portion 3b is omitted and only the falling portion 3a is provided.
  • the falling portion 3a is omitted and only the rising portion 3b is provided. This can be done by deforming the metal plate 3.
  • the bezel 12 is interposed between at least one of the falling portion 3a and the rising portion 3b and the housing 11, in other words, the upper end of the falling portion 3a and the rising portion 3b. It is configured as a frame member that supports at least the liquid crystal display panel 1 and the backlight system 2 integrally with the metal plate 3 by being sandwiched between at least one of the lower ends of the housing 11 and the inner surface of the housing 11. [0073]
  • the rigidity of the falling portion 3a or the rising portion 3b of the metal plate 3 can be increased, so that the load or impact applied to the liquid crystal display device 10 can be further alleviated. it can.
  • the impact from the front surface or the back surface of the liquid crystal display device 10 can be distributed from the housing 11 to the rigid three plates via the bezel 12, damage to the liquid crystal display device 10 is reduced.
  • the rigidity of the liquid crystal display device 10 can be increased, and the resistance to pressing and falling by its own weight can be improved.
  • the fixing screw 21 is screwed vertically into the outer surface of the casing 11, and the casing 11, the bezel 12, and the metal plate 3 are integrated. Can be screwed on.
  • the fixing screw 21 is not necessarily limited to the outer surface of the housing 11 and, for example, as shown in FIG. 8 (a), the fixing screw 21 is screwed vertically into the upper surface of the front housing 11a, and the housing 11 and the bezel 12 While the plate 3 and the plate 3 can be screwed together, as shown in FIG.
  • the fixing screw 21 is screwed vertically into the lower surface of the rear housing l ib so that the bent portion 3c and the bezel 12 are The casing 11, the bezel 12 and the metal plate 3 can be screwed together through the bent part.
  • a claw 22 can be used as a second fixing method.
  • the claw 22 for example, a configuration in which a protruding claw 22 is formed on the side of the horizontal portion of the metal plate 3 and the claw 22 is engaged with a hole 22 a provided in the housing 11 can be employed.
  • the bezel 12 can be further formed with a claw 23 to be inserted into the recess of the metal plate 3.
  • the claw 22, the concave portion of the bezel 12, the claw 23, and the concave portion of the metal plate 3 are formed coaxially.
  • an adhesive 24 can be used as a third fixing method.
  • FIGS. 11 (a) and (b) for example, between the metal plate 3 and the bezel 12, between the bezel 12 and the front case 11a, and between the bezel 12 and the rear case l ib.
  • Each adhesive 24 Is fixed by bonding.
  • the fixing screw 21, the claw 22, and the adhesive 24 can be used in combination.
  • the method of providing the claw 22 may be the method shown in FIGS. 9 (a) and 9 (b). Thereby, the metal plate 3, the bezel 12, and the housing 11 can be firmly fixed.
  • Patent Document 1 also proposes a structure in which a metal plate 203 without an end rising portion is disposed on the back surface as shown in Fig. 16 (a). However, at the end of the metal plate 203, that is, the portion where the rising portion is not formed, as shown in FIG. 16 (b), the metal plate 203 is distorted by the load from the upper side, and accordingly the liquid crystal display panel 201 In addition, since the light guide plate 202b is also distorted, the liquid crystal display panel 201 is destroyed. There is also a description of increased rigidity by providing a recess (not shown) in the metal plate 203.
  • the step shape is formed on the back surface of the light guide plate 202b by forming the depression, it is contrary to the ideal configuration of eliminating the step on the back surface of the light guide plate 202b. Furthermore, when a load is applied from the display surface side of the liquid crystal display panel 201, the liquid crystal display panel 201 is distorted and rather easily broken.
  • the amount of deflection greatly varies depending on the amount of deflection of the same plate when there is no support member at the end, when supporting the free end, and when supporting the fixed end. Therefore, the amount of deflection can be set to 1Z16 by arranging the support member, and the amount of deflection can be set to 1Z4 by using the free end support as the fixed end support.
  • the metal plate 203 can be regarded as a case where there is no support member or a case where a free end is supported.
  • the configuration of the present embodiment has a smaller amount of deflection ( ⁇ max) than the configuration of Patent Document 1.
  • the LCD panel 1 is thin and light, and the distortion amount of the liquid crystal display panel 1 is suppressed. External forces such as a load that can occur during use, a falling of its own weight, and a falling object on the display surface. The strength of the liquid crystal display device 10 can be increased.
  • the liquid crystal display panel 1 is not suitable for taking measures to reduce the display performance due to the arrangement of a protective plate on the display surface side of the liquid crystal display panel 1 or the like.
  • the metal plate 3 is devised to improve the shape of the back and surroundings. As a result, the pressure from the display surface of the liquid crystal display panel 1 and the push-up from the drive circuit board 4 when falling due to its own weight, and further the destruction of the liquid crystal display panel 1 due to the distortion of the liquid crystal module when falling due to its own weight are reduced. Is possible. As a result, it is possible to provide a liquid crystal display device 10 that can suppress the bending stress applied to the liquid crystal display panel 1 and can ensure strength with a thin and light weight.
  • the liquid crystal display device 10 is made of a rigid material having a plane in a wider area than the backlight system 2 between the knock light system 2 and the drive circuit board 4.
  • a plate hereinafter abbreviated as a rigid plate
  • the backlight system 2 is bent by the corners of the rigid plate even if the upper force load of the liquid crystal display panel 1 is applied. There is nothing.
  • the rigid plate becomes a fixed-end support beam and the moment of inertia of the cross section also increases, so that stagnation is reduced. This effect can be obtained if at least a pair of mutually opposing end portions of the rigid plate are provided with falling portions 3a along the end portions.
  • the liquid crystal display device 10 that can reduce the damage to the load on the display surface of the liquid crystal display panel 1 and the impact when dropped.
  • At least a pair of opposite end portions of the rigid plate has a rising portion 3b that protrudes on the opposite side to the drive circuit board 4 at the end portion. It is preferable to form along. This further increases the moment of inertia of the cross section, reducing stagnation.
  • the rigid plate is preferably formed in a rectangular shape!
  • the rectangle conceptually includes a square.
  • the liquid crystal display device that can reduce damage to the load on the display surface of the liquid crystal display panel 1 and the impact when dropped. 10 can be offered.
  • the rigid plate is formed in a rectangular shape !, and at each end of the four sides of the rigid plate, there is a falling portion along the end. Both 3a and rising part 3b are formed. For this reason, the rigid plate becomes a fixed-end support beam in both the left-right direction and the front-rear direction, and the moment of inertia of the cross section also increases. Therefore, itching is further reduced.
  • the rigid plate is the metal plate 3. Accordingly, a general metal plate 3 can be easily used as a rigid plate, and the metal plate 3 can easily process the falling portion 3a, so that the cost is low. In addition, the metal plate 3 can be used for grounding the liquid crystal display device 10, and a heat dissipation effect can be added to the heat generated from the drive circuit board 4 and the backlight system 2.
  • the metal plate 3 also has an aluminum alloy or magnesium alloy force. As a result, the metal plate 3 can be made lighter and more rigid, and has good heat conductivity. It is possible.
  • the rigid plate is fixed by bringing at least one of the upper end of the rising portion 3b and the lower end of the falling portion 3a into contact with the casing 11. Since it functions as a support beam, itching can be reduced. In addition, since the impact from the front surface or the back surface of the liquid crystal display device 10 can be dispersed from the housing 11 to the rigid plate, damage to the liquid crystal display device 10 is reduced.
  • the liquid crystal display panel 1, the knock light system 2, and the bezel 12 that integrally supports the rigid plate can be used.
  • the display panel 1, the knock light system 2, and the rigid plate 3 can be handled as an integrated unit as a liquid crystal module.
  • the rigid plate functions as a fixed-end support beam by bringing at least one of the upper end of the rising portion 3b and the lower end of the falling portion 3a into contact with at least one of the bezel 12 and the casing 11. Therefore, itching can be reduced. Further, since the impact from the front or back surface of the liquid crystal display device 10 can be dispersed from the housing 11 to the rigid plate having high rigidity via the bezel 12, damage to the liquid crystal display device 10 is reduced. .
  • the backlight system 2 includes the light guide plate 2b. Thereby, the knocklight system 2 can be thinned.
  • the tablet-type personal computer as the portable electronic device of the present embodiment includes the liquid crystal display device 10 described above.
  • a portable electronic device including the liquid crystal display device 10 that can reduce damage to the load on the display surface of the liquid crystal display panel 1 and the impact when dropped can be provided.
  • the present invention relates to a liquid crystal display device including a liquid crystal display panel, a knock light, and a drive circuit board for driving the liquid crystal display panel and the backlight, and a portable electronic device including the same.
  • a liquid crystal display device including a liquid crystal display panel, a knock light, and a drive circuit board for driving the liquid crystal display panel and the backlight
  • a portable electronic device including the same. Applicable to vessels.
  • the portable electronic device can be applied to, for example, a tablet personal computer, a notebook computer display, a personal digital assistant (PDA) and a mobile phone.
  • PDA personal digital assistant
  • the present invention is not limited to the above-described portable electronic devices (tablet personal computer, notebook personal computer display, portable information terminal, and mobile phone).
  • liquid crystal display devices such as V and information displays are also effective in securing strength when external loads that may occur during transportation or handling are applied.
  • the configuration of the present invention can be applied to all thin liquid crystal display devices including large TVs.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Liquid Crystal (AREA)

Abstract

Dispositif d'affichage à cristaux liquides pourvu d'un panneau d'affichage à cristaux liquides (1), d'un système de rétro-éclairage (2) et d'une carte de circuit de commande (4) pour commander le panneau d'affichage à cristaux liquides (1) et le système de rétro-éclairage (2). Une plaque métallique (3) ayant une surface plate de taille plus importante que celle du système de rétro-éclairage (2) est disposée entre le système de rétro-éclairage (2) et la carte de circuit de commande (4). Sur au moins une paire de parties d'extrémité opposées de la plaque métallique (3), des sections faisant saillie en direction du bas (3a) du côté de la carte de circuit de commande (4) sont formées le long de ces parties d'extrémité. Ainsi, le dispositif d'affichage à cristaux liquides permet de réduire les risques de rupture dus à une charge sur la surface d'affichage du panneau d'affichage à cristaux liquides (1) et à un choc en cas de chute. L'invention concerne également un appareil électronique pourvu de ce dispositif d'affichage à cristaux liquides.
PCT/JP2007/061982 2006-08-11 2007-06-14 Dispositif d'affichage à cristaux liquides et appareil électronique pourvu de celui-ci Ceased WO2008018232A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2006220564 2006-08-11
JP2006-220564 2006-08-11

Publications (1)

Publication Number Publication Date
WO2008018232A1 true WO2008018232A1 (fr) 2008-02-14

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Application Number Title Priority Date Filing Date
PCT/JP2007/061982 Ceased WO2008018232A1 (fr) 2006-08-11 2007-06-14 Dispositif d'affichage à cristaux liquides et appareil électronique pourvu de celui-ci

Country Status (1)

Country Link
WO (1) WO2008018232A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7944520B2 (en) 2006-08-11 2011-05-17 Sharp Kabushiki Kaisha Liquid crystal display device and electronic apparatus provided with same
US7944521B2 (en) 2006-08-11 2011-05-17 Sharp Kabushiki Kaisha Display apparatus and electronic apparatus with the same
JP2012215682A (ja) * 2011-03-31 2012-11-08 Toshiba Corp 電子機器
JP2016161625A (ja) * 2015-02-27 2016-09-05 富士通株式会社 表示機器
JP2021536029A (ja) * 2018-09-18 2021-12-23 京東方科技集團股▲ふん▼有限公司Boe Technology Group Co., Ltd. バックライトモジュールフレーム、バックライトモジュール、表示モジュール、および表示装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0347584U (fr) * 1989-09-18 1991-05-02
JPH08179289A (ja) * 1994-12-27 1996-07-12 Nec Eng Ltd ディジタイザ及びバックライト付きｌｃｄユニット
JP2000181370A (ja) * 1998-12-18 2000-06-30 Fujitsu Ltd フラットディスプレイ装置及びその製造方法
JP2004163462A (ja) * 2002-11-08 2004-06-10 Sharp Corp 液晶表示装置およびそれを備えた携帯用電子機器

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0347584U (fr) * 1989-09-18 1991-05-02
JPH08179289A (ja) * 1994-12-27 1996-07-12 Nec Eng Ltd ディジタイザ及びバックライト付きｌｃｄユニット
JP2000181370A (ja) * 1998-12-18 2000-06-30 Fujitsu Ltd フラットディスプレイ装置及びその製造方法
JP2004163462A (ja) * 2002-11-08 2004-06-10 Sharp Corp 液晶表示装置およびそれを備えた携帯用電子機器

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7944520B2 (en) 2006-08-11 2011-05-17 Sharp Kabushiki Kaisha Liquid crystal display device and electronic apparatus provided with same
US7944521B2 (en) 2006-08-11 2011-05-17 Sharp Kabushiki Kaisha Display apparatus and electronic apparatus with the same
JP2012215682A (ja) * 2011-03-31 2012-11-08 Toshiba Corp 電子機器
US8797749B2 (en) 2011-03-31 2014-08-05 Kabushiki Kaisha Toshiba Electronic apparatus including bumper portion protecting housing
JP2016161625A (ja) * 2015-02-27 2016-09-05 富士通株式会社 表示機器
JP2021536029A (ja) * 2018-09-18 2021-12-23 京東方科技集團股▲ふん▼有限公司Boe Technology Group Co., Ltd. バックライトモジュールフレーム、バックライトモジュール、表示モジュール、および表示装置
JP7581054B2 (ja) 2018-09-18 2024-11-12 京東方科技集團股▲ふん▼有限公司 バックライトモジュールフレーム、バックライトモジュール、表示モジュール、および表示装置

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