WO2020237972A1 - 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
WO2020237972A1
WO2020237972A1 PCT/CN2019/111244 CN2019111244W WO2020237972A1 WO 2020237972 A1 WO2020237972 A1 WO 2020237972A1 CN 2019111244 W CN2019111244 W CN 2019111244W WO 2020237972 A1 WO2020237972 A1 WO 2020237972A1
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WIPO (PCT)
Prior art keywords
diffusion
backlight module
light
flat layer
led chip
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PCT/CN2019/111244
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English (en)
French (fr)
Inventor
张桂洋
杨勇
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武汉华星光电技术有限公司
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Publication of WO2020237972A1 publication Critical patent/WO2020237972A1/zh

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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
    • G02F1/1335—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
    • G02F1/133611—Direct backlight including means for improving the brightness uniformity

Definitions

  • the invention relates to the field of display, in particular to a backlight module and a display device.
  • the current display technology is divided into two types: side-type display and direct-type display.
  • the traditional LCD technology uses side-entry light-emitting technology, using a light guide plate to convert the line light source into a surface light source, and color filter film and liquid crystal surface for light modulation to achieve color display.
  • the typical direct display is an OLED display, which uses organic light-emitting materials to form display pixels and electrically excites the organic materials to form a color display.
  • the OLED display method has a series of advantages such as fast response speed, high transmittance (long battery life), high contrast, wide color gamut, and light weight.
  • due to the high current of organic light-emitting materials they will age seriously, and It is easily affected by water and oxygen, resulting in low brightness and short life.
  • the direct backlight structure is used to divide the LED light source into several areas, and each area can be individually controlled. During the display process, the corresponding LED light source can be selectively turned off and on according to the characteristics of the display screen. This partition lights up the backlight.
  • the LED light source corresponding to black or low grayscale images can be turned off; second, the contrast is high, there is no light leakage problem in the black areas, and the electric power saved by these black areas can be superimposed on the high grayscale
  • the area is used to make the bright area brighter.
  • the present invention provides a backlight module and a display device to solve the problem that the difference in brightness or chromaticity of adjacent areas in the backlight when different areas in the backlight is lit in the prior art will be more obvious.
  • the problem of border effects is not limited to:
  • the present invention provides a backlight module, including a substrate; a reflective layer arranged on the substrate; a plurality of LED chips arranged on the reflective layer; a diffusion structure arranged on the substrate; On the LED chip; a first diffusion film is provided on the diffusion structure; a brightness enhancement film is provided on the first diffusion film.
  • the diffusion structure includes a flat layer covering the LED chip; a second diffusion film arranged on the flat layer; and a first light-emitting layer arranged on the second diffusion film.
  • the diffusion structure includes a flat layer covering the LED chip; a first light-emitting layer disposed on the flat layer; wherein the first light-emitting layer is provided with a first diffusion layer on the side close to the flat layer unit.
  • the diffusion structure includes a flat layer covering the LED chip; a first light-emitting layer disposed on the flat layer; wherein the flat layer is provided with a second diffusion layer on the side close to the first light-emitting layer unit.
  • the diffusion structure includes a plurality of diffusion units, and any one of the diffusion units correspondingly encapsulates an LED chip.
  • the diffusion unit is doped with scattering particles, and the size of the scattering particles is 1um-5um.
  • the material of the second diffusion film is at least one of acrylic, polyethylene terephthalate, and polymethyl methacrylate.
  • the material of the flat layer is transparent silica gel or epoxy resin.
  • the diffusion structure is a luminescent material, including at least one of fluoride phosphor, yttrium aluminum garnet, or quantum dot material.
  • the present invention also provides a display device including the backlight module.
  • the backlight module and the display device of the present invention fill the gaps of the LED chips with transparent materials, so that the LED chips are leveled as a whole; a diffusion film is arranged between the light-emitting layer and the flat layer, which is optimized for the partitioned lighting technology in the display area of the display device.
  • the boundary brightness and uniform chromaticity between different areas are optimized from the hardware aspect to ensure that the light path from the light source emitted by the LED chip to the light-emitting layer is consistent, which significantly reduces the cost, the manufacturing process is simple, and it can be mass-produced.
  • the scattering part is prepared on the light-emitting layer or the flat layer by means of electron beam or ion beam or chemical etching. The adoption of this structure can reduce the thickness of the backlight module and reduce the cost.
  • FIG. 1 is a schematic diagram of a backlight module in the background art.
  • FIG. 2 is a schematic diagram of the backlight module in Embodiment 1.
  • FIG. 2 is a schematic diagram of the backlight module in Embodiment 1.
  • FIG 3 is a schematic diagram of a backlight module in the second embodiment.
  • FIG. 4 is a schematic diagram of a backlight module in the second embodiment.
  • FIG. 5 is a schematic diagram of the backlight module in the third embodiment.
  • FIG. 6 is a schematic diagram of the diffusion unit in Embodiment 3.
  • FIG. 6 is a schematic diagram of the diffusion unit in Embodiment 3.
  • FIG. 7 is a schematic diagram of the display device in Embodiment 1.
  • FIG. 7 is a schematic diagram of the display device in Embodiment 1.
  • the display device 1 of the present invention includes a backlight module 10, which includes a substrate 110, a reflective layer 120, an LED chip 130, a diffusion structure 140, and a first Diffusion film 150 and brightness enhancement film 160.
  • the substrate 110 is a driving substrate, and a plurality of driving circuits are distributed on the substrate 110 to connect to the LED chip 130 and provide power.
  • the reflective layer 120 is provided on the substrate 110 to reflect the light emitted by the LED chip 130, so that all or most of the light emitted by the LED chip 130 can be used as the light source of the backlight module 10.
  • the luminous efficiency of the LED chip 130 is improved.
  • the LED chips 130 are evenly arranged on the substrate 110.
  • the LED chips 130 are blue LED chips, which serve as the light source of the backlight module 10, and the LED chips 130 are provided with light emitting
  • the structure can convert electrical energy into light energy.
  • the diffusion structure 140 includes a flat layer 141, a first light-emitting layer 142, and a second diffusion film 143.
  • the flat layer 141 is made of a transparent material so that the light generated by the LED chip 130 can pass through the flat layer 141.
  • the material can be transparent silica gel or epoxy resin.
  • the flat layer 141 covers the LED chips 130. This is because the LED chips 130 are evenly spaced on the substrate 110, and there are inevitably gaps between the adjacent LED chips 130. In order to improve this In the structure, the flat layer 141 is used to fill the gaps between the LED chips 130. At the same time, in order to avoid the difference in height caused by the manufacturing process and the tolerance of the LED chip 130 during the manufacturing process, the flat layer 141 covers all the LED chips 130 at the same time, the height of which is higher than that of any one of the LED chips 130.
  • the first light-emitting layer 142 is disposed on the flat layer 141 and is made of fluoride phosphor, yttrium aluminum garnet or quantum dot material, and is used to enhance the luminous intensity of the LED chip 130.
  • the light source of the backlight module 10 is a plurality of uniformly arranged LED chips 130, and each LED chip 130 can be individually controlled, and the display In the process, the LED chip 130 can be selectively turned off and on according to the characteristics and requirements of the display screen, thereby saving energy and power.
  • the LED chip 130 corresponding to the low-gray image in the display screen can be turned off, and the LED chip in the black shaded part 130 can be turned off, which not only solves the light leakage problem of the display device 1, but also can superimpose the electric power saved in the black shading part on the high gray scale area to improve the contrast.
  • the second diffusion film 143 of the present invention is provided between the first light-emitting layer 142 and the flat layer 141 to solve the problem that when the LED chip 130 is lit in different areas, adjacent areas
  • the difference between the brightness or chromaticity will have obvious border effects, such as poor color transition between bright and dark areas, yellow edges, blurred border colors, insufficient sharpness when displaying text, etc., which affect the display quality.
  • the second diffusion film 143 improves the propagation path of the light emitted by the LED chip 130 through the uneven surface structure, so that the light reaching the first light-emitting layer 142 is uniform excitation light in all directions, thereby avoiding excitation Different light propagation paths result in uneven brightness and chromaticity between different areas.
  • the first diffusion film 150 is provided on the first light-emitting layer 142, and its material is the same as that of the second diffusion film 143, and its function is to make the light emitted from the first light-emitting layer 142 uniform in all directions Excitation light, so as to avoid the phenomenon of uneven brightness and chromaticity between different regions due to different propagation paths of excitation light.
  • the brightness enhancement film 160 is provided on the first diffusion film 150, which is a prism film or a reflective polarized brightness enhancement film. Its working principle is mainly to use two different high and low refractive index materials to form a multilayer film. The brightness enhancement film 160 performs multiple reflections to achieve a brightness enhancement effect.
  • the display device 1 includes a backlight module 10, and the backlight module 10 includes a substrate 110, a reflective layer 120, an LED chip 130, a diffusion structure 1401, a first diffusion film 150 and a brightness enhancement film 160.
  • the structure of this embodiment is substantially similar to that of Embodiment 1.
  • the diffusion structure 1401 in this embodiment includes a flat layer 1411 and a first light-emitting layer 1421.
  • the side of the layer 1421 close to the flat layer 1411 is provided with a first diffusion portion 14210.
  • the first diffusion portion 14110 is formed by using electron beam, ion beam or chemical etching on the surface of the first light-emitting layer 1421, and the first light-emitting layer 1421 is directly formed on the surface of the The first diffuser 14110 can reduce the thickness of the backlight module 10 and can also save costs.
  • a second diffusion portion 14110 may also be provided on the side of the flat layer 1411 close to the first light-emitting layer 1421.
  • the second diffusion portion 14110 is formed by preparing a light scattering structure on the flat layer 1411 by hot pressing or electron beam, ion beam combined with a mask, etc., and can also reduce the backlight module 10 Thickness and reduce costs.
  • the first diffusing portion 14210 and the second diffusing portion 14110 can exist at the same time or separately in this embodiment, and their function is to improve the spread of light emitted by the LED chip 130 through the uneven surface structure
  • the path makes the light reaching the first light-emitting layer 142 uniform excitation light in all directions, thereby avoiding the phenomenon of uneven brightness and chromaticity between different regions due to different propagation paths of the excitation light.
  • the display device 1 includes a backlight module 10, which includes a substrate 110, a reflective layer 120, an LED chip 130, a diffusion structure 1402, a first diffusion film 150, and a Brightening film 160.
  • the substrate 110 is a driving substrate, and a plurality of driving circuits are distributed on the substrate 110 to connect to the LED chip 130 and provide power.
  • the reflective layer 120 is provided on the substrate 110 to reflect the light emitted by the LED chip 130, so that all or most of the light emitted by the LED chip 130 can be used as the light source of the backlight module 10.
  • the luminous efficiency of the LED chip 130 is improved.
  • the LED chips 130 are evenly arranged on the substrate 110.
  • the LED chips 130 are blue LED chips, which serve as the light source of the backlight module 10, and the LED chips 130 are provided with light emitting
  • the structure can convert electrical energy into light energy.
  • the diffusion structure 1402 is a luminescent material, and its material can be fluoride phosphor, yttrium aluminum garnet or quantum dot material and other commonly used luminescent film materials.
  • the diffusion structure 1402 includes a plurality of diffusion units 14020, any of the diffusion units Each 14020 corresponds to packaging one LED chip 130.
  • the single package of the LED chip 130 can effectively design the light output angle and light type of the LED chip 130 by changing the shape of the diffusion unit 14020.
  • the light type emitted from the LED chip 130 is a Lambertian type.
  • the diffusion structure 1402 is doped with scattering particles 14021, and the size of the scattering particles 14021 is between 1 um and 5 um, so that the light emitted by the LED chip 130 is more uniform and soft.
  • the first diffusion film 150 is disposed on the diffusion structure 1402, and the light emitted by the LED chip 130 forms a surface light source with uniform brightness through the first diffusion film 150. On the one hand, it effectively avoids regional lighting. The problem of uneven brightness at the boundary, on the other hand, can significantly reduce the amount of luminescent material used and reduce the production cost.
  • the brightness enhancement film 160 is provided on the first diffusion film 150, which is a prism film or a reflective polarized brightness enhancement film. Its working principle is mainly to use two different high and low refractive index materials to form a multilayer film. The brightness enhancement film 160 performs multiple reflections to achieve a brightness enhancement effect.

Abstract

本发明公开了一种背光模组及显示装置，背光模组包括基板；反射层，设于所述基板上；若干LED芯片，排布于所述反射层上；扩散结构，设于所述LED芯片上；第一扩散膜，设于所述扩散结构上；增亮膜，设于所述第一扩散膜上。本发明的有益效果在于本发明的背光模组及显示装置通过透明材料填充LED芯片的间隙，使LED芯片整体平整。

Description

一种背光模组及显示装置 技术领域
本发明涉及显示领域，特别涉及一种背光模组及显示装置。
 背景技术
目前的显示技术分为侧入式显示和直下式显示两类。传统的LCD技术采用侧入式发光技术，利用导光板将线光源转换为面光源，搭配彩色滤光膜和液晶面进行光调制，实现彩色显示。而直下式显示的典型则是OLED显示，它是将有机发光材料制作成显示像素，电激发有机材料形成彩色显示。二者相比，OLED显示方式具有响应速度快、透过率高（续航时间长）、对比度高、色域广、质量轻等一系列优势，但是由于有机发光材料高电流下会老化严重，且易受水、氧影响，致使其亮度较低、寿命短。
为了优化LCD显示效果，提高其对比度，降低背光驱动功耗，基于直下式结构的LCD显示技术应运而生，其背光结构如图1所示。采用直下式背光结构将LED发光源分成若干个区域，对每个区域都能单独控制，在显示过程中根据显示画面的特征可以选择性的关闭和打开对应的LED光源，这种分区点亮背光有两方面优势：一是节能省电，黑色或者低灰度画面对应的LED光源可以关闭；二是对比度高，黑色区域不存在漏光问题，且这些黑色区域节省下来的电功率可以叠加在灰度高的区域使用，使亮的区域更亮。
但是新的问题出现了，背光中不同分区在点亮时，相邻区域的亮度或者色度的差异会产生比较明显的边界效应，如亮暗区域间的颜色过渡不好、出现黄边、边界色彩模糊、显示文字时锐利度不够等，会严重影响显示画质。这些问题是随着器件结构与生俱来无法克服的。
 技术问题
为了解决上述技术问题：本发明提供了一种背光模组及显示装置，以解决现有技术中在背光中不同分区在点亮时，相邻区域的亮度或者色度的差异会产生比较明显的边界效应的问题。
 技术解决方案
解决上述问题的技术方案是：本发明提供了一种背光模组，包括基板；反射层，设于所述基板上；若干LED芯片，排布于所述反射层上；扩散结构，设于所述LED芯片上；第一扩散膜，设于所述扩散结构上；增亮膜，设于所述第一扩散膜上。
进一步的，所述扩散结构包括平坦层，覆盖所述LED芯片；第二扩散膜，设于所述平坦层上；第一发光层，设于所述第二扩散膜上。
进一步的，所述扩散结构包括平坦层，覆盖所述LED芯片；第一发光层，设于所述平坦层上；其中，所述第一发光层靠近所述平坦层一侧设有第一扩散部。
进一步的，所述扩散结构包括平坦层，覆盖所述LED芯片；第一发光层，设于所述平坦层上；其中，所述平坦层靠近所述第一发光层一侧设有第二扩散部。
进一步的，所述扩散结构包括若干扩散单元，任一所述扩散单元对应封装一LED芯片。
进一步的，所述扩散单元中掺杂有散射粒子，所述散射粒子尺寸为1um-5um。
进一步的，所述第二扩散膜的材料为亚克力、聚对苯二甲酸乙二醇酯、聚甲基丙烯酸甲酯中的至少一种。
进一步的，其中所述平坦层的材质为透明硅胶或环氧树脂。
进一步的，所述扩散结构为发光材料，包括氟化物荧光粉、钇铝石榴石或者量子点材料中的至少一种。
本发明还提供了一种显示装置，包括所述背光模组。
 有益效果
本发明的背光模组及显示装置通过透明材料填充LED芯片的间隙，使LED芯片整体平整；在发光层和平坦层之间设置扩散膜，针对在显示装置的显示区分区点亮技术中，优化不同区域间的边界亮度和均匀色度，从硬件方面进行优化，保证LED芯片发出的光源到发光层上的光程一致，显著的降低成本，制作工艺简单，能够大规模生产，同时也可以单独在发光层或平坦层上通过电子束或离子束或者化学刻蚀等方式制备散射部，采用这种结构能够减少背光模组的厚度且成本会有降低。
 附图说明
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是背景技术中的背光模组示意图。
图2是实施例1中的背光模组示意图。
图3是实施例2中的一种背光模组示意图。
图4是实施例2中的一种背光模组示意图。
图5是实施例3中的背光模组示意图。
图6是实施例3中的扩散单元示意图。
图7是实施例1中的显示装置示意图。
图中
10 背光模组；                    110 基板；
120 反射层；                     130 LED芯片；
140 扩散结构；                   150第一扩散膜；
160 增亮膜；                     141、1411 平坦层；
142、1421 第一发光层；           143 第二扩散膜；
14210 第一扩散部；               14110 第二扩散部；
14020 扩散单元；                 14021 散射粒子；
 本发明的实施方式
以下实施例的说明是参考附加的图式，用以例示本发明可用以实施的特定实施例。本发明所提到的方向用语，例如「上」、「下」、「前」、「后」、「左」、「右」、「顶」、「底」等，仅是参考附加图式的方向。因此，使用的方向用语是用以说明及理解本发明，而非用以限制本发明。
实施例1
如图2和图7所示，本实施例中，本发明的显示装置1包括背光模组10，所述背光模组10包括基板110、反射层120、LED芯片130、扩散结构140、第一扩散膜150和增亮膜160。
所述基板110为驱动基板，其上分布有若干驱动电路，用以连接所述LED芯片130并提供电能。
所述反射层120设于所述基板110上，用以对所述LED芯片130发出的光线进行反射，从而使LED芯片130发出的光线能够全部或绝大多数作为背光模组10的光源使用，提高LED芯片130发光有效率。
所述LED芯片130均匀排布于所述基板110上，本实施例中，所述LED芯片130为蓝光LED芯片，其作为所述背光模组10的光源，所述LED芯片130内部设有发光结构，能够将电能转换为光能。
本实施例中，所述扩散结构140包括平坦层141、第一发光层142和第二扩散膜143。
所述平坦层141为透明材料，以便所述LED芯片130产生的光线从平坦层141中穿过，其材料可以为透明硅胶或环氧树脂。所述平坦层141覆盖所述LED芯片130，这是因为所述LED芯片130间隔均匀排布于所述基板110上，相邻所述LED芯片130之间不可避免的存在空隙，为了改善这种结构，采用所述平坦层141填充所述LED芯片130之间的空隙，同时为了避免所述LED芯片130在制造过程中由于制程和本身的公差带来的高度不一的现象，所述平坦层141同时覆盖所有LED芯片130，其高度高于任一所述LED芯片130的高度。
所述第一发光层142设于所述平坦层141上，其为氟化物荧光粉、钇铝石榴石或者量子点材料，用于增强所述LED芯片130的发光强度。
由于本实施例中的所述背光模组10采用直下式结构，其中，所述背光模组10的发光源为若干个均匀排列的LED芯片130，每一LED芯片130都能单独控制，在显示过程中可以根据显示画面的特征和要求选择性的关闭和打开LED芯片130，从而可以节能省电，显示画面中的低灰度画面对应的所述LED芯片130可以关闭，黑色遮光部分的LED芯片130可以关闭，既解决了显示装置1的漏光问题，也可以将在黑色遮光部分节省下来的电功率叠加在灰度高的区域使用，提高对比度。
本实施例中，本发明的第二扩散膜143设于所述第一发光层142和所述平坦层141之间，用以解决当所述LED芯片130在不同区域点亮时，相邻区域的亮度或者色度之间的差异会出现比较明显的边界效应，如亮暗区域间的颜色过渡不好，出现黄边、边界色彩模糊、显示文字时锐度不够等影响显示画质的问题，所述第二扩散膜143通过表面凹凸不平的结构，改善所述LED芯片130 发出的光线的传播路径，使到达所述第一发光层142的光线为各个方向均匀的激发光，从而避免因激发光的传播路径不同形成不同区域间的亮色度不均匀的现象。
所述第一扩散膜150设于所述第一发光层142上，其材质与所述第二扩散膜143相同，作用是为了使从所述第一发光层142发出的光线为各个方向均匀的激发光，从而避免因激发光的传播路径不同形成不同区域间的亮色度不均匀的现象。
所述增亮膜160设于所述第一扩散膜150上，其为棱镜膜或反射型偏光增亮膜，其工作原理主要是利用两种不同高低折射率的材料组成多层膜，光线经过所述增亮膜160进行多次反射从而实现增亮的效果。
实施例2
本实施例中，所述显示装置1包括背光模组10，所述背光模组10包括基板110、反射层120、LED芯片130、扩散结构1401、第一扩散膜150和增亮膜160。
如图3所示，其中，本实施例与实施例1结构大体相似，不同点在于，本实施例中的扩散结构1401包括平坦层1411和第一发光层1421，其中，在所述第一发光层1421靠近所述平坦层1411一侧设有第一扩散部14210。
所述第一扩散部14110是通过在所述第一发光层1421的表面采用电子束或离子束或化学刻蚀的方式制备形成的，采用直接在所述第一发光层1421的表面形成所述第一扩散部14110，可以减少所述背光模组10的厚度同时也可以节约成本。
同样的，如图4所示，也可以在所述平坦层1411靠近所述第一发光层1421一侧设置第二扩散部14110。
所述第二扩散部14110是通过在所述平坦层1411通过热压或者电子束、离子束结合掩膜板等方式制备一层光散射结构从而制备形成的，也可以减少所述背光模组10的厚度并降低成本。
所述第一扩散部14210和所述第二扩散部14110在本实施例中可以同时存在也可以单独存在，其作用都是通过表面凹凸不平的结构，改善所述LED芯片130 发出的光线的传播路径，使到达所述第一发光层142的光线为各个方向均匀的激发光，从而避免因激发光的传播路径不同形成不同区域间的亮色度不均匀的现象。
实施例3
如图5所示，本实施例中，所述显示装置1包括背光模组10，所述背光模组10包括基板110、反射层120、LED芯片130、扩散结构1402、第一扩散膜150和增亮膜160。
所述基板110为驱动基板，其上分布有若干驱动电路，用以连接所述LED芯片130并提供电能。
所述反射层120设于所述基板110上，用以对所述LED芯片130发出的光线进行反射，从而使LED芯片130发出的光线能够全部或绝大多数作为背光模组10的光源使用，提高LED芯片130发光有效率。
所述LED芯片130均匀排布于所述基板110上，本实施例中，所述LED芯片130为蓝光LED芯片，其作为所述背光模组10的光源，所述LED芯片130内部设有发光结构，能够将电能转换为光能。
所述扩散结构1402为发光材料，其材料可以为氟化物荧光粉、钇铝石榴石或者量子点材料等常用的发光膜材料，所述扩散结构1402包括若干扩散单元14020，任一所述扩散单元14020均对应封装一颗所述LED芯片130，采用对所述LED芯片130进行单颗封装的方式可以通过改变所述扩散单元14020的外形有效设计所述LED芯片130的出光角度和出光光型，使所述LED芯片130射出的光型为朗伯型。
如图6所示，所述扩散结构1402掺杂有散射粒子14021，所述散射粒子14021的尺寸在1um至5um之间，使所述LED芯片130发出得光线更加均匀，柔和。
所述第一扩散膜150设于所述扩散结构1402上，所述LED芯片130射出的光通过所述第一扩散膜150形成亮度均匀的面光源，一方面有效避免了区域性点亮产生的边界亮度不均的问题，另一方面能够显著减少发光材料的使用量，降低制作成本。
所述增亮膜160设于所述第一扩散膜150上，其为棱镜膜或反射型偏光增亮膜，其工作原理主要是利用两种不同高低折射率的材料组成多层膜，光线经过所述增亮膜160进行多次反射从而实现增亮的效果。
以上仅为本发明的较佳实施例而已，并不用以限制本发明，凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本发明的保护范围之内。

Claims (11)

  1. 一种背光模组，其中，包括
    基板；
    反射层，设于所述基板上；
    若干LED芯片，排布于所述反射层上；
    扩散结构，设于所述LED芯片上；
    第一扩散膜，设于所述扩散结构上；
    增亮膜，设于所述第一扩散膜上。
  2. 根据权利要求1所述的背光模组，其中，
    所述扩散结构包括
    平坦层，覆盖所述LED芯片；
    第二扩散膜，设于所述平坦层上；
    第一发光层，设于所述第二扩散膜上。
  3. 根据权利要求1所述的背光模组，其中，
    所述扩散结构包括
    平坦层，覆盖所述LED芯片；
    第一发光层，设于所述平坦层上；其中，所述第一发光层靠近所述平坦层一侧设有第一扩散部。
  4. 根据权利要求1所述的背光模组，其中，
    所述扩散结构包括
    平坦层，覆盖所述LED芯片；
    第一发光层，设于所述平坦层上；其中，所述平坦层靠近所述第一发光层一侧设有第二扩散部。
  5. 根据权利要求1所述的背光模组，其中，
    所述扩散结构包括若干扩散单元，任一所述扩散单元对应封装一LED芯片。
  6. 根据权利要求5所述的背光模组，其中，
    所述扩散单元中掺杂有散射粒子，所述散射粒子尺寸为1um-5um。
  7. 根据权利要求2所述的背光模组，其中，
    所述第二扩散膜的材料为亚克力、聚对苯二甲酸乙二醇酯、聚甲基丙烯酸甲酯中的至少一种。
  8. 根据权利要求2所述的背光模组，其中
    所述平坦层的材质为透明硅胶或环氧树脂。
  9. 根据权利要求3所述的背光模组，其中
    所述平坦层的材质为透明硅胶或环氧树脂。
  10. 根据权利要求5所述的背光模组，其中，
    所述扩散结构为发光材料，包括氟化物荧光粉、钇铝石榴石或者量子点材料中的至少一种。
  11. 一种显示装置，其中，包括如权利要求1所述的背光模组。
PCT/CN2019/111244 2019-05-28 2019-10-15 一种背光模组及显示装置 WO2020237972A1 (zh)

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Families Citing this family (4)

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Publication number Priority date Publication date Assignee Title
CN110161752A (zh) * 2019-05-28 2019-08-23 武汉华星光电技术有限公司 一种背光模组及显示装置
CN111599909B (zh) * 2020-05-21 2023-07-11 东莞市中麒光电技术有限公司 一种led显示屏模块及其制备方法
CN112164743A (zh) * 2020-09-27 2021-01-01 深圳Tcl新技术有限公司 一种背光模组以及显示装置
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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2896325Y (zh) * 2006-03-21 2007-05-02 比乐达国际有限公司 显示器的发光二极管背光模组
US20090194774A1 (en) * 2008-02-04 2009-08-06 Kismart Corporation Light source module with wavelength converting structure and the method of forming the same
CN201439904U (zh) * 2009-04-24 2010-04-21 奕东电子（湖北）有限公司 一种液晶显示器背光源
CN107861291A (zh) * 2017-10-24 2018-03-30 华为技术有限公司 背光模组、显示屏及终端
CN108732817A (zh) * 2018-05-28 2018-11-02 武汉华星光电技术有限公司 背光模组及显示装置
CN208421467U (zh) * 2018-06-08 2019-01-22 深圳市瑞丰光电子股份有限公司 一种背光模组、显示装置及其电子设备
CN109285469A (zh) * 2018-10-31 2019-01-29 武汉华星光电技术有限公司 一种面光源显示模组
CN109581737A (zh) * 2017-09-28 2019-04-05 乐金显示有限公司 背光单元以及包括该背光单元的液晶显示装置
CN110161752A (zh) * 2019-05-28 2019-08-23 武汉华星光电技术有限公司 一种背光模组及显示装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101771557B1 (ko) * 2011-01-05 2017-08-25 엘지전자 주식회사 디스플레이 장치
CN108732818A (zh) * 2018-05-29 2018-11-02 武汉华星光电技术有限公司 背光模组、显示装置及背光模组的制作方法

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2896325Y (zh) * 2006-03-21 2007-05-02 比乐达国际有限公司 显示器的发光二极管背光模组
US20090194774A1 (en) * 2008-02-04 2009-08-06 Kismart Corporation Light source module with wavelength converting structure and the method of forming the same
CN201439904U (zh) * 2009-04-24 2010-04-21 奕东电子（湖北）有限公司 一种液晶显示器背光源
CN109581737A (zh) * 2017-09-28 2019-04-05 乐金显示有限公司 背光单元以及包括该背光单元的液晶显示装置
CN107861291A (zh) * 2017-10-24 2018-03-30 华为技术有限公司 背光模组、显示屏及终端
CN108732817A (zh) * 2018-05-28 2018-11-02 武汉华星光电技术有限公司 背光模组及显示装置
CN208421467U (zh) * 2018-06-08 2019-01-22 深圳市瑞丰光电子股份有限公司 一种背光模组、显示装置及其电子设备
CN109285469A (zh) * 2018-10-31 2019-01-29 武汉华星光电技术有限公司 一种面光源显示模组
CN110161752A (zh) * 2019-05-28 2019-08-23 武汉华星光电技术有限公司 一种背光模组及显示装置

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