WO2015172461A1 - 一种背光模组及显示装置 - Google Patents

一种背光模组及显示装置 Download PDF

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Publication number
WO2015172461A1
WO2015172461A1 PCT/CN2014/085534 CN2014085534W WO2015172461A1 WO 2015172461 A1 WO2015172461 A1 WO 2015172461A1 CN 2014085534 W CN2014085534 W CN 2014085534W WO 2015172461 A1 WO2015172461 A1 WO 2015172461A1
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WO
WIPO (PCT)
Prior art keywords
light source
light
backlight module
display device
layer
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/CN2014/085534
Other languages
English (en)
French (fr)
Inventor
冯兰
王峥
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BOE Technology Group Co Ltd
Beijing BOE Display Technology Co Ltd
Original Assignee
BOE Technology Group Co Ltd
Beijing BOE Display Technology 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.)
Filing date
Publication date
Application filed by BOE Technology Group Co Ltd, Beijing BOE Display Technology Co Ltd filed Critical BOE Technology Group Co Ltd
Priority to US14/653,952 priority Critical patent/US9739445B2/en
Priority to EP14870642.7A priority patent/EP3144581B1/en
Publication of WO2015172461A1 publication Critical patent/WO2015172461A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • F21V5/02—Refractors for light sources of prismatic shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • F21V5/04—Refractors for light sources of lens shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/0025—Combination of two or more reflectors for a single light source
    • F21V7/0033—Combination of two or more reflectors for a single light source with successive reflections from one reflector to the next or following
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/04—Optical design
    • F21V7/05—Optical design plane
    • 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
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133603—Direct backlight with LEDs
    • 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
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • 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
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses

Definitions

  • the present invention relates to the technical field of display, and in particular to a backlight module and a display device. Background technique
  • the light emitted by the display device during use is provided by a backlight.
  • the backlights in the prior art mainly include a side-entry backlight and a direct-lit backlight, and the principles are all provided on the backplane disposed in the backlight.
  • the light source member illuminates to provide illumination to the display device.
  • a disadvantage of the prior art is that the display device in the prior art is realized by adjusting the current of the light source member in the entire backlight when adjusting the brightness, the adjustment range is small, and even if the brightness requirement of the display device is relatively In the low case, all the light source parts are also in working state, which affects the service life of the backlight.
  • the invention provides a backlight module and a display device for improving the adjustment range of the brightness of the display device and improving the display effect of the display device.
  • the invention provides a backlight module, which comprises:
  • the first light source layer located on a light emitting side surface of the backlight module, the first light source layer includes a plurality of spaced apart first light source members;
  • a second light source layer located on a side surface opposite to the light exiting side of the backlight module, wherein the second light source layer includes a second light source member corresponding to a gap position between the adjacent first light source members ;
  • An optical member disposed between the first light source layer and the second light source layer and changing a propagation path of the light illuminating the first light source member onto the first light source member to pass through the gap.
  • the display device can be provided with light by using the first light source layer alone, the second light source layer alone or the first light source layer and the second light source layer, thereby improving the display brightness adjustable range of the display device.
  • the display device in the case that the display device is low in brightness, one of the first light source layer and the second light source layer is turned off, which reduces the use time of the light source member, thereby improving the service life of the light source member, and further, a light source
  • the other light source layer can still provide light to the display device, ensuring that the display device can be used normally, improving the emergency response capability of the display device, and improving the use of optical components. Light utilization.
  • the optical component includes a lens corresponding to each of the second light source members, correspondingly disposed and changing a propagation path of the light illuminating the first light source member to the first light source member to exit through the gap.
  • the light emitted from the second light source member is refracted by the lens, and the propagation path of the light irradiated onto the first light source member is changed to be irradiated onto the display panel.
  • the lens is a triangular prism or a convex lens. Different lenses can be chosen to change the propagation path of the light.
  • the diameter of the convex lens is 1 to 2 times the width of the second light source member. It is ensured that the light emitted from the second light source member can be changed in the direction of propagation by the convex lens.
  • the diameter of the convex lens is twice the width of the second light source member. It is further ensured that the light emitted from the second light source member can be changed by the convex lens, and the convex lens is facilitated.
  • the triangular prism is a positive triangular prism.
  • the light emitted from the second light source member by the positive triangular prism can be changed by the convex lens.
  • the optical component comprises a first reflective layer disposed on a side of the first light source member facing the second light source member, and a second reflective layer disposed between the adjacent second light source members.
  • the light that is incident on the first light source member is changed by the reflection sheet to be irradiated onto the display panel.
  • the width of the second light source member is not greater than the width of the gap between the adjacent first light source members. Avoid excessive light being blocked by the first source.
  • the first light source member and the second light source member are both organic light emitting diode light strips. Has a good luminescent effect.
  • the present invention also provides a display device and an electronic device including the same, the display device comprising a display panel and the backlight module of any one of the above-mentioned items disposed on a light entrance side of the display panel.
  • the display device can be provided with light by using the first light source layer alone, the second light source layer alone or the first light source layer and the second light source layer, thereby improving the display brightness adjustable range of the display device.
  • the display device in the case that the display device is low in brightness, one of the first light source layer and the second light source layer is turned off, which reduces the use time of the light source member, thereby improving the service life of the light source member, and further, a light source
  • the other light source layer can still provide light to the display device, ensuring that the display device can be used normally, improving the emergency response capability of the display device, and improving the use of optical components. Light utilization. DRAWINGS
  • FIG. 1 is a schematic structural diagram of a backlight module according to an embodiment of the present invention.
  • FIG. 2 is another schematic structural diagram of a backlight module according to an embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of a backlight module according to an embodiment of the present invention.
  • an embodiment of the present invention provides a display device.
  • the embodiment of the present invention by providing two layers of light source members, the light adjustment range of the backlight is increased, thereby improving the display effect of the display device.
  • FIG. 1 shows a structure of a backlight module according to an embodiment of the present invention
  • FIG. 2 shows another structure of a backlight module according to an embodiment of the present invention.
  • the embodiment of the invention provides a backlight module, and the backlight module comprises:
  • the first light source layer 20 includes a plurality of spaced-apart first light source members 21;
  • a second light source layer 30 located on a side surface opposite to the light-emitting side of the backlight module, wherein the second light source layer 30 includes a first-in-one correspondence with a gap position between adjacent first light source members 21 Two light source members 31;
  • the backlight module provided by the above embodiment requires darkness when the display device is in use.
  • the display device can be powered separately by the first light source layer 20 or the second light source layer 30.
  • the second light source layer 30 is used alone to supply power to the display device, a portion of the light emitted from the second light source member 31 of the second light source layer 30 passes through the gap between the first light source members 21 in the first light source layer 20 and is directly irradiated.
  • another portion of the light originally irradiated onto the first light source member 21 is irradiated to the display panel 10 through the gap between the first light source members 21 after changing the propagation path through the optical member 40.
  • the light that is originally blocked by the first light source member 21 can be irradiated onto the display panel 10 through the gap, thereby improving the light utilization efficiency of the display device, and the display device displays a brighter picture, thereby improving the display effect of the display device. .
  • the display device can be provided with light by using the first light source layer 20 alone, the second light source layer 30 alone or the first light source layer 20 and the second light source layer 30, thereby improving the display brightness of the display device. Adjustable range. Meanwhile, in the case where the display device is low in brightness, one of the first light source layer 20 and the second light source layer 30 may be turned off, which reduces the use time of the closed light source member, thereby improving the life of the light source member. In addition, when one of the first light source layer 20 or the second light source layer 30 fails, the other light source layer can still provide light to the display device, ensuring that the display device can be used normally, and improving the emergency response capability of the display device. In addition, the use of optical components also increases the utilization of light.
  • the width of the second light source member 31 is not greater than the width of the gap between the adjacent first light source members 21. Thereby, it is ensured that the light emitted from the second light source member 31 can pass through the gap between the first light source members 21 more, and the light emitted from the second light source member 31 is blocked by the first light source member 21.
  • the optical component 40 may be an optical component 40 of a different structure.
  • the structure of the optical component 40 of the display device provided by the embodiment of the present invention will be described in detail below with reference to FIG. 1, FIG. 2 and FIG.
  • Figure 1 shows a structure of an optical component.
  • the optical component 40 may include a first reflective layer 42 disposed on the first light source member 21 facing the second light source member 31, and a second reflective layer 41 disposed between the adjacent second light source members 31.
  • the first reflective layer 42 and the second reflective layer 41 may be high reflectivity metal layers.
  • the display device provided in this embodiment is in use, as shown in FIG. 1, part of the light emitted from the second light source member 31 is irradiated onto the first light source member 21. At this time, the light passes through The first reflective layer 42 disposed on the first light source member 21 is reflected, and then reflected and irradiated to the second reflective layer 41 disposed between the second light source members 31, reflected again by the second reflective layer 41, and passed through A gap between the light source members 21 is irradiated onto the display panel 10.
  • Both the first reflective layer 42 and the second reflective layer 41 can be made of high reflectivity metal, thereby improving the reflection effect of light and avoiding the loss of light.
  • the optical component 40 includes a propagation path of the light that is disposed corresponding to each of the second light source members 31 and changes the light of the second light source member 31 to the first light source member 21 to pass through the gap and then illuminate the display panel 10 .
  • Lens 43 The structure of the lens 43 can adopt a different structure, which will be described below by way of specific embodiments.
  • Fig. 2 shows another structure of the optical component.
  • the lens 43 provided in this embodiment is a convex lens 431, and each convex lens 431 corresponds to a second light source member 31.
  • the light emitted from the second light source member 31 enters the convex lens 431.
  • the convex lens 431 has a function of condensing light.
  • the light originally irradiated onto the first light source member 21 is refracted by the convex lens 431 to change the propagation direction, and is irradiated onto the display panel 10 through the gap between the first light source members 21, thereby enhancing the light.
  • the brightness of the display panel 10 improves the display effect of the display device.
  • each convex lens 431 corresponds to each of the second light source members 31, and the second light source member 31 is located at a focal plane of the convex lens 431, so that the light scattered by the second light source member 31 can be concentrated by the convex lens 431. More light can be incident on the display panel 10.
  • the diameter of the convex lens 431 is 1 to 2 times the width of the second light source member 31, thereby ensuring that the light emitted from the second light source member 31 can all be concentrated by the convex lens 431, thereby improving the utilization rate of the light. More preferably, the diameter of the convex lens 431 may be twice the width of the second light source member 31, facilitating the fabrication of the convex lens 431 and concentrating light.
  • a preliminary exposure unit is formed by photolithography on the substrate, a micro-rectangular array structure is first formed, and the substrate is heated, and the photoresist is formed by the surface tension after the photoresist is melted, and the heat is solidified.
  • Apply a flat layer to the microlens structure The layer (the flat layer can be made of organic material and has a thickness of up to the order of millimeters to ensure the flatness of the surface, facilitating the fabrication of the first light source layer 20).
  • the microstructure of the convex lens 431 is made of a polyester organic material, and its refractive index is greater than the refractive index of the base material (for example, polycarbonate, refractive index of 1.58).
  • Fig. 3 shows another structure of the optical component.
  • the lens 43 provided in this embodiment is a triangular mirror 432, and each of the triangular prisms 432 corresponds to a second light source member 31.
  • the light emitted from the second light source member 31 enters the triangular prism 432, and the triangular prism 432 has a function of condensing light: the light originally irradiated onto the first light source member 21 passes through the triangular prism 432. After the refraction, the direction of propagation is changed, and the light is applied to the display panel 10 through the gap between the first light source members 21, thereby enhancing the brightness of the display panel 10 and improving the display effect of the display device.
  • each of the triangular prisms 432 corresponds to a second light source member 31.
  • the triangular prisms 432 can refract light of the first light source to the first light source member 21 by different structures.
  • the optical component 40 includes a substrate and a triangular prism 432 disposed on the substrate, the triangular prism 432 having a refractive index higher than a refractive index of the substrate.
  • the placement direction shown in FIG. 3 is referred to as the reference direction.
  • one face of the triangular prism 432 is the incident surface, and the other two faces are the exit faces, and the incident faces are placed in parallel on the second light source member 31.
  • the light emitted from the second light source member 31 is refracted on the exit surface of the triangular prism 432.
  • the light is concentrated into the gap between the first light source members 21, so that the light can be irradiated onto the display panel 10 through the gap, thereby improving the light utilization efficiency of the display device, and the brightness of the display screen of the display device is enhanced, and the improvement is improved. Display the display effect of the device.
  • the width of the triangular prism 432 is 1 to 2 times the width of the second light source member 31, thereby ensuring that the light emitted from the second light source member 31 can all pass through the convergence of the triangular prism 432. Increase the use of light. More preferably, the width of the triangular prism 432 is twice the width of the second light source member 31, facilitating the fabrication of the triangular prism 432 and concentrating light.
  • a preliminary exposure unit is formed by photolithography on the substrate, a micro-rectangular array structure is first formed, and the substrate is further heated. After the photoresist is melted, the triangular prism 432 microstructure is formed due to surface tension, and after heating and solidification A flat layer is coated on the microlens structure (the flat layer can be made of an organic material and has a thickness of up to the order of millimeters to ensure the flatness of the surface, facilitating the fabrication of the first light source layer 20).
  • the triangular prism 432 structure is adopted Made of polyester organic material, its refractive index is greater than the refractive index of the flat layer material (eg polycarbonate, refractive index 1.58).
  • the optical component 40 in the embodiment of the present invention can adopt different structures to change the light propagation path and improve the display effect of the display device.
  • the optical component 40 provided by the embodiment of the present invention is not limited to the specific structure enumerated in the above specific embodiments, and any other path that can change the light illuminating the first light source component 21 on the first light source component 21 can be realized.
  • the structure of the optical member 40 that is irradiated onto the display panel 10 through the gap can be applied to the embodiment of the present invention.
  • the first light source member 21 and the second light source member 31 may be the same or different light source members.
  • the first light source member 21 and the second light source member 31 are both organic light emitting diode light strips, and have good illumination effects. .
  • the embodiment of the present invention further provides a display device and an electronic device including the display device, the display device comprising a display panel 10 and a backlight module according to any of the above embodiments disposed on a light entrance side of the display panel.
  • the display device provided in the embodiment of the present invention may be: a liquid crystal panel, an electronic paper, a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, etc., any product or component having a display function.
  • the display device can be provided with light by using the first light source layer alone, the second light source layer alone or the first light source layer and the second light source layer, thereby improving the display brightness adjustable range of the display device.
  • the display device in the case that the display device is low in brightness, one of the first light source layer and the second light source layer is turned off, which reduces the use time of the light source member, thereby improving the service life of the light source member;
  • the other light source layer can still provide light to the display device, ensuring that the display device can be used normally, and improving the emergency response capability of the display device; Increased light utilization. It is within the spirit and scope of the invention.
  • the present invention cover the modifications and the modifications

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  • Nonlinear Science (AREA)
  • Engineering & Computer Science (AREA)
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Abstract

一种背光模组及显示装置，该背光模组包括：位于背光模组出光侧的第一光源层（20），第一光源层（20）包括多个间隔设置的第一光源件（21）；位于与背光模组出光侧相对的一侧的第二光源层（30），其中，第二光源层（30）包括与相邻的第一光源件（21）之间间隙位置一一对应设置的第二光源件（31）；设置在第一光源层（20）和第二光源层（30）之间并使第二光源件（31）照射到第一光源件（21）上的光线通过间隙出射的光学部件（40）。能够通过采用单独一层或者两层光源层给显示装置提供光线，提高了显示装置的显示亮度可调整的范围；同时，在显示装置为低亮度的情况下，能够通过单独光源层提供光线，减少了部分光源件的使用时间，从而提高了光源件的使用寿命；此外，通过采用光学部件（40）还提高了光线的利用率。

Description

一种背光模组及显示装置 技术领域
本发明涉及显示的技术领域， 尤其涉及到一种背光模组及显示装 置。 背景技术
显示装置在使用时出射的光线是通过背光源提供的， 现有技术中 的背光源主要有侧入式背光源和直下式背光源， 其原理均是通过设置 在背光源中的背板上的光源件发光来给显示装置提供光亮。
现有技术的缺陷在于， 现有技术中的显示装置在调整亮度时， 是 通过调整整个背光源中的光源件的通电电流来实现的， 调整范围较小， 并且即使在显示装置的亮度要求较低的情况下， 所有的光源件也均处 于工作状态， 影响背光源的使用寿命。 发明内容
本发明提供了一种背光模组及显示装置， 用以提高显示装置的亮 度的调整范围， 改善了显示装置的显示效果。
本发明提供了一种背光模组， 该背光模组包括：
位于所述背光模组出光侧表面的第一光源层， 所述第一光源层包 括多个间隔设置的第一光源件；
位于与所述背光模组出光侧相对的一侧表面的第二光源层， 其中， 所述第二光源层包括与相邻的第一光源件之间间隙位置——对应设置 的第二光源件；
设置在所述第一光源层和第二光源层之间并改变所述第二光源件 照射到所述第一光源件上的光线的传播路径使其通过所述间隙出射的 光学部件。
在上述实施例中， 能够通过单独采用第一光源层、 单独采用第二 光源层或者同时使用第一光源层和第二光源层为显示装置提供光线， 提高了显示装置的显示亮度可调整的范围， 同时， 在显示装置为低亮 度的情况下， 第一光源层和第二光源层中有一个是关闭的， 减少了光 源件的使用时间， 从而提高了光源件的使用寿命， 此外， 在第一光源 层或第二光源层中有一个出现故障时， 另一个光源层依然可以为显示 装置提供光线， 保证了显示装置能够正常使用， 提高了显示装置的应 急能力， 此外， 通过采用光学部件还提高了光线的利用率。
优选的， 所述光学部件包括与每个第二光源件——对应设置并改 变所述第二光源件照射到所述第一光源件的光线的传播路径使其通过 所述间隙出射的透镜。 通过透镜对从第二光源件出射的光线进行折射， 改变照射到第一光源件上的光线的传播路径使其照射到显示面板上。
优选的， 所述透镜为三棱镜或凸透镜。 可以选择不同的透镜改变 光线的传播路径。
优选的， 所述凸透镜的直径为第二光源件宽度的 1〜2 倍。 保证了 从第二光源件出射的光线能够被凸透镜改变传播方向。
优选的， 所述凸透镜的直径为第二光源件宽度的两倍。 进一步保 证了从第二光源件出射的光线能够被凸透镜改变传播方向， 同时方便 了凸透镜的制作。
优选的， 所述三棱镜为正三棱镜。 通过正三棱镜改变从第二光源 件出射的光线能够被凸透镜改变传播方向。
优选的， 所述光学部件包括设置在所述第一光源件朝向第二光源 件一面的第一反射层， 以及设置在相邻的第二光源件之间的第二反射 层。 通过反射片改变照射到第一光源件上的光线， 使其照射到显示面 板上。
优选的， 所述第二光源件的宽度不大于所述相邻第一光源件之间 间隙的宽度。 避免过多的光线被第一光源件挡住。
优选的， 所述第一光源件和第二光源件均为有机发光二极管灯条。 具有良好的发光效果。
本发明还提供了一种显示装置以及包括该显示装置的电子设备， 该显示装置包括显示面板以及设置在显示面板入光侧的上述任一项所 述的背光模组。
在上述实施例中， 能够通过单独采用第一光源层、 单独采用第二 光源层或者同时使用第一光源层和第二光源层为显示装置提供光线， 提高了显示装置的显示亮度可调整的范围， 同时， 在显示装置为低亮 度的情况下， 第一光源层和第二光源层中有一个是关闭的， 减少了光 源件的使用时间， 从而提高了光源件的使用寿命， 此外， 在第一光源 层或第二光源层中有一个出现故障时， 另一个光源层依然可以为显示 装置提供光线， 保证了显示装置能够正常使用， 提高了显示装置的应 急能力， 此外， 通过采用光学部件还提高了光线的利用率。 附图说明
图 1为本发明实施例提供的背光模组的一种结构示意图；
图 2为本发明实施例提供的背光模组的另一种结构示意图
图 3为本发明实施例提供的背光模组的又 -种结构示意图。
附图标记：
10-显示面板 20-第一光源层 21-第一光源件
30-第二光源层 31-笫二光源件 40-光学部件
41-第二反射层 42-笫一反射层 43-透镜
431-凸透镜 432-三棱镜 具体实施方式
为了用以提高显示装置的亮度的调整范围， 改善显示装置的显示 效果， 本发明实施例提供了一种显示装置。 在本发明的实施例中， 通 过设置两层光源件， 从而增大了背光源的光线调整范围， 进而改善了 显示装置的显示效果。 为使本发明的目的、 技术方案和优点更加清楚， 以下以非限制性的实施例为例对本发明作进一步详细说明。
如图 1和图 2所示， 图 1 示出了本发明实施例提供的背光模组的 一种结构， 图 2示出了本发明实施例提供的背光模组的另一种结构。
本发明实施例提供了一种背光模组， 该背光模组包括：
位于所述背光模组出光侧表面的第一光源层 20 , 所述第一光源层 20包括多个间隔设置的第一光源件 21 ;
位于与所述背光模组出光侧相对的一侧表面的第二光源层 30 , 其 中， 所述第二光源层 30 包括与相邻的第一光源件 21之间间隙位置一 一对应设置的第二光源件 31 ;
设置在所述第一光源层 20和第二光源层 30之间并改变所述第二 光源件 31 照射到所述第一光源件 21 上的光线的传播路径使其通过所 述间隙出射的光学部件 40。
上述实施例提供的背光模组在使用时， 当显示装置需要亮度较暗 时， 可以通过第一光源层 20或者第二光源层 30单独给显示装置供电。 在单独采用第二光源层 30给显示装置供电时， 从第二光源层 30的第 二光源件 31 出射的光线一部分通过第一光源层 20中的第一光源件 21 之间的间隙后直接照射到显示面板 10上； 另一部分原来照射到第一光 源件 21 上的光线经过光学部件 40改变传播路径后， 也通过第一光源 件 21之间的间隙后照射到显示面板 10。 这使得原来被第一光源件 21 遮挡的光线能够通过间隙后照射到显示面板 10上， 从而提高了显示装 置的光线利用率， 使得显示装置显示的画面更加明亮， 进而改善了显 示装置的显示效果。
在上述实施例中， 能够通过单独采用第一光源层 20、 单独采用第 二光源层 30或者同时使用第一光源层 20和第二光源层 30为显示装置 提供光线， 提高了显示装置的显示亮度可调整的范围。 同时， 在显示 装置为低亮度的情况下， 第一光源层 20和第二光源层 30 中有一个可 以是关闭的， 减少了关闭的光源件的使用时间， 从而提高了光源件的 使用寿命。 此外， 在第一光源层 20或第二光源层 30 中有一个出现故 障时， 另一个光源层依然可以为显示装置提供光线， 保证了显示装置 能够正常使用， 提高了显示装置的应急能力。 此外， 通过采用光学部 件还提高了光线的利用率。
其中的第二光源件 31 的宽度不大于所述相邻第一光源件 21之间 间隙的宽度。 从而保证从第二光源件 31 出射的光线能够更多的穿过第 一光源件 21之间的间隙， 改善了从第二光源件 31 出射的光线被第一 光源件 21遮挡住的情况。
其中的光学部件 40可以为不同结构的光学部件 40 ,下面结合图 1、 图 2和图 3对本发明实施例提供的显示装置的光学部件 40的结构进行 详细说明。
实施例 1
图 1示出了光学部件的一种结构。 具体的， 光学部件 40可以包括 设置在第一光源件 21朝向第二光源件 31—面的第一反射层 42 , 以及 设置在相邻的第二光源件 31之间的第二反射层 41。
具体的， 该第一反射层 42和第二反射层 41可以为高反射率金属 层。 本实施例提供的显示装置在使用时， 如图 1 所示， 从第二光源件 31 出射的光线中有部分光线照射到第一光源件 21上。 此时， 该光线通 过设置在第一光源件 21上的第一反射层 42反射， 反射后照射到设置 在第二光源件 31之间的第二反射层 41 , 经过第二反射层 41的再次反 射， 并通过第一光源件 21之间的间隙照射到显示面板 10上。 这使得 原来照射到第一光源件 21 上并被第一光源件 21 遮挡的光线能够照射 到显示面板 10上， 提高了显示装置的光线利用率， 使得显示装置显示 的画面更加明亮， 进而改善了显示装置的显示效果。 第一反射层 42和 第二反射层 41均可以采用高反射率的金属制作而成， 从而提高光线的 反射效果， 避免光线的损耗。
除上述通过反射的方式实现光线传播路径的改变的结构外， 还可 以采用其他的方式 （如折射） 使得光线的传播路径改变。 此时， 该光 学部件 40 包括与每个第二光源件 31—一对应设置并改变第二光源件 31照射到第一光源件 21上的光线的传播路径使其通过间隙后照射到显 示面板 10的透镜 43。 该透镜 43的结构可以采用不同的结构， 下面以 具体实施例进行说明。
实施例 2
图 2示出了光学部件的另外一种结构， 本实施例提供的透镜 43为 凸透镜 431 , 每个凸透镜 431对应一个第二光源件 31。 在显示装置使 用时，如图 2所示，从第二光源件 31 出射的光线进入到凸透镜 431 中。 凸透镜 431具有会聚光线的作用：原来照射到第一光源件 21上的光线 , 经过凸透镜 431的折射后改变传播方向， 通过第一光源件 21之间的间 隙后照射到显示面板 10上， 增强了显示面板 10的亮度， 改善了显示 装置的显示效果。
具体的， 每个凸透镜 431与每个第二光源件 31—一对应， 且第二 光源件 31位于凸透镜 431 的焦平面上， 从而使得第二光源件 31发散 射出的光线能够被凸透镜 431 会聚， 使得更多的光线能够射入到显示 面板 10上。 较佳的， 凸透镜 431 的直径为第二光源件 31 宽度的 1〜2 倍， 从而保证了从第二光源件 31 出射的光线能够全部经过凸透镜 431 的会聚， 提高光线的使用率。 更佳的， 凸透镜 431 的直径可以为第二 光源件 31宽度的两倍， 便于凸透镜 431的制作以及会聚光线。
在生产时， 通过在基板上通过光刻的方法制成初步的曝光单元， 先形成微矩形阵列结构， 再加热基板， 光刻胶热熔后由于表面张力作 用形成凸透镜 431 微结构， 加热固化后在微透镜结构上涂覆一层平坦 层 （平坦层可采用有机材料制作而成， 厚度可达毫米级， 以保证表面 的平整度， 便于第一光源层 20的制作） 。 其中该凸透镜 431微结构采 用聚酯有机材料制作， 其折射率大于基底材料折射率即可 （如： 聚碳 酸酯， 折射率 1.58 ) 。
实施例 3
图 3示出了光学部件的另一结构。 本实施例提供的透镜 43为三棱 镜 432 , 每个三棱镜 432对应一个第二光源件 31。 在显示装置使用时， 如图 3所示， 从第二光源件 31 出射的光线进入到三棱镜 432中， 三棱 镜 432具有会聚光线的作用： 原来照射到第一光源件 21上的光线， 经 过三棱镜 432的折射后改变传播方向， 通过第一光源件 21之间的间隙 后照射到显示面板 10上， 增强了显示面板 10的亮度， 改善了显示装 置的显示效果。
具体的， 每个三棱镜 432与一个第二光源件 31——对应， 在三棱 镜 432放置时， 可以通过不同的结构来实现三棱镜 432将第一光源照 射到第一光源件 21 上的光线折射到显示面板 10的目的， 具体的， 如 图 3所示， 光学部件 40包括基材以及设置在基材上的三棱镜 432 , 该 三棱镜 432的折射率高于基材的折射率。 继续参考图 3 , 以图 3所示的 放置方向为参考方向， 此时， 三棱镜 432 的一个面为入射面， 另外两 个面为出射面， 且入射面平行放置在第二光源件 31上。 第二光源件 31 射出的光线在三棱镜 432 的出射面上发生折射。 将光线会聚到第一光 源件 21之间的间隙内，使所述光线能够通过间隙后照射到显示面板 10 上， 提高了显示装置的光线利用率， 使得显示装置显示的画面亮度增 强， 改善了显示装置的显示效果。 较佳的， 三棱镜 432 的宽度为第二 光源件 31 宽度的 1〜2倍， 从而保证了从第二光源件 31 出射的光线能 够全部经过三棱镜 432 的会聚。 提高光线的使用率。 更佳的， 三棱镜 432的宽度为第二光源件 31宽度的两倍， 便于三棱镜 432的制作以及 会聚光线。
在生产时， 通过在基板上通过光刻的方法制成初步的曝光单元， 先形成微矩形阵列结构， 再加热基板， 光刻胶热熔后由于表面张力作 用形成三棱镜 432 微结构， 加热固化后在微透镜结构上涂覆一层平坦 层 （平坦层可采用有机材料制作而成， 厚度可达毫米级， 以保证表面 的平整度， 便于第一光源层 20的制作） 。 其中该三棱镜 432结构采用 聚酯有机材料制作， 其折射率大于平坦层材料的折射率即可 （如： 聚 碳酸酯， 折射率 1.58 ) 。
从上述具体实施例 1、 实施例 2和实施例 3可以看出， 本发明实施 例中的光学部件 40可以采用不同的结构来实现改变光线传播路径， 改 善显示装置的显示效果。 应当理解的是， 本发明实施例提供的光学部 件 40不仅限于上述具体实施例列举的具体结构， 其他任意可实现改变 第二光源件 31 照射到第一光源件 21 上的光线的传播路径使其通过间 隙后照射到显示面板 10上的光学部件 40的结构均可应用到本发明实 施例中。
其中的第一光源件 21 和第二光源件 31 可以选用相同或不同的光 源件， 较佳的， 第一光源件 21 和第二光源件 31 均为有机发光二极管 灯条， 具有良好的照射效果。
本发明实施例还提供了一种显示装置以及包括该显示装置的电子 设备， 该显示装置包括显示面板 10以及设置在显示面板入光侧的上述 任一实施例所述的背光模组。
本发明实施例中提供的显示装置可以为： 液晶面板、 电子纸、 手 机、 平板电脑、 电视机、 显示器、 笔记本电脑、 数码相框、 导航仪等 任何具有显示功能的产品或部件。
在上述实施例中， 能够通过单独采用第一光源层、 单独采用第二 光源层或者同时使用第一光源层和第二光源层为显示装置提供光线， 提高了显示装置的显示亮度可调整的范围； 同时， 在显示装置为低亮 度的情况下， 第一光源层和第二光源层中有一个是关闭的， 减少了光 源件的使用时间， 从而提高了光源件的使用寿命； 此外， 在第一光源 层或第二光源层中有一个出现故障时， 另一个光源层依然可以为显示 装置提供光线， 保证了显示装置能够正常使用， 提高了显示装置的应 急能力； 此外， 通过采用光学部件还提高了光线的利用率。 脱离本发明的精神和范围。 这样， 倘若本发明的这些修改和变型属于 本发明权利要求及其等同技术的范围之内， 则本发明也意图包含这些 改动和变型在内。

Claims

权 利 要 求
1. 一种背光模组， 其特征在于， 包括：
位于所述背光模组出光侧表面的第一光源层， 所述第一光源层包 括多个间隔设置的第一光源件；
位于与所述背光模组出光侧相对的一侧表面的第二光源层， 其中， 所述第二光源层包括与相邻的第一光源件之间间隙位置——对应设置 的第二光源件；
设置在所述第一光源层和第二光源层之间并改变所述第二光源件 照射到所述第一光源件上的光线的传播路径使其通过所述间隙出射的 光学部件。
2. 如权利要求 1所述的背光模组， 其特征在于， 所述光学部件包 括与每个第二光源件一一对应设置并改变所述第二光源件照射到所述 第一光源件的光线的传播路径使其通过所述间隙出射的透镜。
3. 如权利要求 2所述的背光模组， 其特征在于， 所述透镜为三棱 镜或凸透镜。
4. 如权利要求 3所述的背光模组， 其特征在于， 所述凸透镜的直 径为第二光源件宽度的 1〜2倍。
5. 如权利要求 4所述的背光模组， 其特征在于， 所述凸透镜的直 径为第二光源件宽度的两倍。
6. 如权利要求 2所述的背光模组， 其特征在于， 所述三棱镜为正 三棱镜。
7. 如权利要求 1所述的背光模组， 其特征在于， 所述光学部件包 括设置在所述第一光源件朝向第二光源件一面的第一反射层， 以及设 置在相邻的第二光源件之间的第二反射层。
8. 如权利要求 1所述的背光模组， 其特征在于， 所述第二光源件 的宽度不大于所述相邻第一光源件之间间隙的宽度。
9. 如权利要求 1〜8任一项所述的背光模组， 其特征在于， 所述第 一光源件和第二光源件均为有机发光二极管灯条。
10. 一种显示装置， 其特征在于， 包括显示面板以及设置在显示面 板入光侧的如权利要求 1〜9任一项所述的背光模组。
11. 一种电子设备，其特征在于， 包括如权利要求 10所述的显示装置。
PCT/CN2014/085534 2014-05-16 2014-08-29 一种背光模组及显示装置 Ceased WO2015172461A1 (zh)

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EP3144581A4 (en) 2018-01-03
US20160265737A1 (en) 2016-09-15

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