WO2023103051A1 - 背光模组和显示装置 - Google Patents

背光模组和显示装置 Download PDF

Info

Publication number
WO2023103051A1
WO2023103051A1 PCT/CN2021/139290 CN2021139290W WO2023103051A1 WO 2023103051 A1 WO2023103051 A1 WO 2023103051A1 CN 2021139290 W CN2021139290 W CN 2021139290W WO 2023103051 A1 WO2023103051 A1 WO 2023103051A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
backlight module
protruding structures
different
protruding
Prior art date
Application number
PCT/CN2021/139290
Other languages
English (en)
French (fr)
Inventor
杨伟恒
刘刚
王维
Original Assignee
Tcl华星光电技术有限公司
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 Tcl华星光电技术有限公司 filed Critical Tcl华星光电技术有限公司
Priority to US17/622,774 priority Critical patent/US20240036397A1/en
Publication of WO2023103051A1 publication Critical patent/WO2023103051A1/zh

Links

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
    • G02F1/133606—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
    • 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
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • 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
    • G02F1/133605—Direct backlight including specially adapted reflectors

Definitions

  • the present application relates to the field of display technology, in particular to a backlight module and a display device.
  • Mini LED is used as a new technology in mobile phones, cars, notebooks, etc.
  • the direct backlight of Mini LED technology has thousands, tens of thousands, or even more Mini LED lamp beads, and its brightness has been greatly improved.
  • each Mini LED can be individually controlled by the PCB board.
  • the HDR resolution of the display has reached an unprecedented level.
  • the embodiment of the present application provides a backlight module, including:
  • a plurality of light-emitting units arranged at intervals, and two adjacent light-emitting units have gaps;
  • the optical film is arranged on one side of the light emitting unit
  • a light concentrating structure the light concentrating structure is arranged on the side of the optical film close to the light emitting unit, and the light concentrating structure is located in the area opposite to the slit, the light concentrating structure includes a plurality of different protruding structure.
  • the embodiment of the present application also provides a display device, including:
  • the light concentrating structure is arranged in the gap between adjacent light emitting units, so that after the light emitted by the light emitting unit is emitted to the light concentrating structure, the protruding structure in the light concentrating structure can make the light Refraction occurs, which can expand the direction of the light to the optical film, so that the area corresponding to the gap on the optical film emits light evenly, and because the light-gathering structure is a plurality of different protruding structures, the light can not be emitted in this area. Moiré due to coherent interference occurs.
  • FIG. 1 is a schematic diagram of the first structure of the backlight module provided by the embodiment of the present application.
  • FIG. 2 is a first structural schematic diagram of the light-condensing structure in the backlight module shown in FIG. 1;
  • FIG. 3 is a second structural schematic diagram of the light-condensing structure in the backlight module shown in FIG. 1;
  • FIG. 4 is a schematic diagram of a third structure of the light-condensing structure in the backlight module shown in FIG. 1;
  • FIG. 5 is a schematic diagram of a fourth structure of the light concentrating structure in the backlight module shown in FIG. 1;
  • FIG. 6 is a schematic diagram of a fifth structure of the light-condensing structure in the backlight module shown in FIG. 1;
  • FIG. 7 is a schematic diagram of the second structure of the backlight module provided by the embodiment of the present application.
  • first and second are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features.
  • a feature defined as “first” or “second” may explicitly or implicitly include one or more of said features.
  • “plurality” means two or more, unless otherwise specifically defined.
  • Splicing screen technology has been widely used in the production of large-size display screens.
  • the splicing screen market has a wide range of applications and can be applied to commercial displays, outdoors, and security monitoring.
  • Most of the existing splicing screens are spliced with multiple sub-display panels, and two adjacent sub-display panels always have areas that cannot be displayed in the splicing area, which is the so-called gap, or splicing seam for short.
  • the light at the seam is weaker than the light at other positions, so that there is a clear contrast between light and dark at the seam and other places, resulting in shadows; in addition, there will be splicing tolerances between different circuit boards, so that the LEDs cannot be completely one-to-one. Light mixing occurs, making the light emitted by the display screen uneven.
  • the present application proposes a backlight module and a display device.
  • the present application will be further described below in conjunction with the accompanying drawings and embodiments.
  • FIG. 1 is a schematic structural diagram of a backlight module provided by an embodiment of the present application.
  • the embodiment of the present application provides a backlight module 100 , the backlight module 100 includes a plurality of light emitting units 10 , an optical film 30 and a light concentrating structure 20 arranged at intervals.
  • the light concentrating structure 20 Located in a region opposite to the slit 40 , the light concentrating structure 20 includes a plurality of different protruding structures 210 , wherein the protruding structures 210 are used to uniformly emit light from the light emitting unit 10 from the optical film 30 .
  • the light concentrating structure 20 is arranged at the gap 40 between adjacent light emitting units 10, so that after the light emitted by the light emitting unit 10 is emitted to the light concentrating structure 20, the protruding structure 210 in the light concentrating structure 20 The light can be refracted, and then the direction of the light to the optical film 30 can be enlarged, so that the area corresponding to the slit 40 on the optical film 30 emits light evenly, and since the light concentrating structure 20 is a plurality of different protruding structures 210, It can prevent the light from moiré due to coherent interference in this area.
  • the area on the optical film 30 facing the slit 40 is defined as the light-gathering area 50 .
  • FIG. 2 is a first structural schematic diagram of the light-condensing structure in the backlight module shown in FIG. 1 .
  • the light concentrating structure 20 includes a first protruding structure 211 and a plurality of second protruding structures 212, wherein the shape of the first protruding structure 211 and the shape of the second protruding structure 212 are the same, and the first protruding structure 211 is optically
  • the length of the orthographic projection on the film 30 is different from the length of the orthographic projection of the second protruding structure 212 on the optical film 30 .
  • the light concentrating structure 20 includes a plurality of first protruding structures 211 and a plurality of second protruding structures 212, wherein the shapes of the first protruding structures 211 and the shapes of the second protruding structures 212 are the same,
  • the length of the orthographic projection of the first protruding structure 211 on the optical film 30 is different from the length of the orthographic projection of the second protruding structure 212 on the optical film 30 .
  • the light concentrating structure 20 includes a plurality of protruding structures 210 of different sizes, wherein the shape of the first protruding structure 211 and the shape of the second protruding structure 212 are the same, and each protruding structure 210 The lengths of the orthographic projections on the optical film 30 are different.
  • the direction of the light path can be enlarged through irregular structure distribution, so that the distribution of light in the light concentrating area 50 is more uniform.
  • due to The light concentrating structure 20 is distributed in an irregular structure, and the moiré pattern caused by coherent interference will not occur in the light here.
  • FIG. 3 is a second structural schematic diagram of the light concentrating structure 20 in the backlight module 100 shown in FIG. 1 .
  • the light concentrating structure 20 includes a first protruding structure 211 and a plurality of second protruding structures 212, wherein the length of the orthographic projection of the first protruding structure 211 on the optical film 30 is the same as that of the second protruding structure 212
  • the length of the orthographic projection on the optical film 30 is the same, the shape of the first protruding structure 211 and the shape of the second protruding structure 212 are different, for example, the shape of the first protruding structure is a triangle, and the shape of the second protruding structure is triangular.
  • the shape is trapezoidal.
  • the shape of the first protruding structure is a right triangle, and the shape of the second protruding structure is an equilateral triangle.
  • the shape of the first protruding structure is a triangle
  • the shape of the second protruding structure is a frustum of a circle, and so on.
  • the light concentrating structure 20 includes a plurality of protruding structures 210 with different shapes.
  • the shape of the protruding structure 210 can be any type of triangle, trapezoid, circular truncated or any type of protrusion, and there is no specific limitation here, as long as at least one of the protruding structures 210 is satisfied. It only needs to be different in shape from the shape of the rest of the protruding structures 210 .
  • the plurality of different protruding structures 210 can be that the size of at least one protruding structure 210 is different from the size of the remaining protruding structures 210 and the shape of at least one protruding structure 210 is different from that of the remaining protruding structures 210. of different shapes.
  • FIG. 4 is a schematic diagram of a third structure of the light concentrating structure 20 in the backlight module 100 shown in FIG. 1 .
  • the protruding structure 210 includes a first protruding structure 211, a second protruding structure 212 and a third protruding structure 213.
  • the shape of the first protruding structure and the shape of the second protruding structure are different and the size of the first protruding structure is different from the size of the second protruding structure.
  • the shape of the first protruding structure is the same as that of the second protruding structure, but the size of the first protruding structure is different from that of the second protruding structure, and the shape of the third protruding structure is the same as that of the second protruding structure.
  • the shapes of the two protruding structures are different, but the size of the first protruding structure is the same as that of the second protruding structure.
  • the shape of the first protruding structure, the shape of the second protruding structure and the shape of the third protruding structure are different, and the size of the first protruding structure, the size of the second protruding structure and the size of the third protruding structure are different.
  • the three protruding structures differ in size.
  • FIG. 5 is a schematic diagram of a fourth structure of the light-condensing structure in the backlight module shown in FIG. 1 .
  • the protruding structure 210 includes a first protruding structure, a second protruding structure, a third protruding structure and a fourth protruding structure adjacently arranged, and the first protruding structure and the second protruding structure The distance between them is the first distance D1, the distance between the second protruding structure and the third protruding structure is the second distance D2, and the distance between the third protruding structure and the fourth protruding structure is the third distance D3 .
  • the first distance is not equal to the second distance
  • the third distance is equal to the first distance or the second distance.
  • the first distance, the second distance and the third distance are not equal.
  • FIG. 6 is a schematic diagram of a fifth structure of the light-condensing structure in the backlight module shown in FIG. 1 .
  • the light concentrating structure 20 also includes a substrate 220, a side of the substrate 220 close to the light-emitting unit 10 is provided with a plurality of protruding structures 210, and a plurality of particles 230 are provided on the substrate 220, and the particles 230 are used to convert the protruding structures
  • the light emitted from 210 is diffusely reflected and then emitted to the optical film 30 .
  • At least one particle 230 of the plurality of particles 230 has a different size than the remaining particles 230 .
  • the particles 230 of different sizes can better improve the diffuse reflection of the light emitted by the light emitting unit 10 , so as to improve the uniformity of the light emitted by the area corresponding to the slit 40 on the optical film 30 .
  • the number of particles 230 distributed per unit area on the substrate 220 is not all the same.
  • the distribution density of the particles 230 on the substrate 220 is different, the diffuse reflection effect of the light on the particles 230 can be improved, so as to improve the uniformity of light emission in the area corresponding to the slit 40 on the optical film 30 .
  • the particles 230 may be particles 230 having a light-scattering effect, such as silicon dioxide particles and the like.
  • the light emitted by the light-emitting unit 10 in the embodiment of the present application is directed to the light-concentrating structure 20, and a part of the light is refracted by a plurality of different protruding structures 210 in the light-concentrating structure 20, which expands the direction of the light in the light-concentrating area 50, A part of the light enters the light-gathering area 50 from the joints between different protruding structures 210 .
  • the light enters into the particles 230 diffuse reflection will further occur, increasing the light output angle, and further expanding the uniformity effect of the light.
  • the light-emitting unit 10 includes a substrate 120 and a light source 110.
  • the light source 110 is arranged on the side of the substrate 120 away from the optical film 30.
  • the light source 110 that emits light can be considered as a point light source 110.
  • the light source 110 can also be one or more than one illuminant, such as Light-emitting diodes, light bulbs, etc., the light source 110 emits the light source 110 required by the display panel.
  • the optical film 30 can scatter the light emitted by the light source 110, so that the light emitted by the light source 110 can be uniform. emit, and provide a surface light source 110 with uniform light for the display panel.
  • the backlight module 100 can be a Mini LED backlight module 100
  • the substrate 120 can be a PCB board, a plurality of PCB boards are spliced to form a Mini LED board
  • the light source 110 is a Mini LED
  • a plurality of Mini LEDs are arranged on the Mini LED board.
  • a prism structure in order to reduce the light at the slit 40 that is weaker than other positions, forming an obvious contrast between light and dark, and producing dark shadows, a prism structure will be provided on the side of the light source 110 close to the slit 40 , that is, at a distance from the slit 40
  • a prism structure 130 is provided on the nearest Mini LED.
  • the Mini LED includes a first side and a second side, wherein the first side is the side close to the slit 40, and the second side is the side away from the slit 40, which can be Part or all of the first side is provided with a prism structure 130 for concentrating the light from the light source 110 on the light concentrating structure 20 .
  • the number of prism structures 130 is at least two, and the prism structures 130 are arranged side by side outside the light source 110, and the plurality of prism structures 130 can increase the light intensity of the light source 110 in the light-gathering area 50, so that in the optical film 30
  • the light intensity of the upper light-concentrating area 50 is consistent with the light intensity of other positions on the optical film 30 , so that the light is uniformly emitted from the optical film 30 .
  • a plurality of prism structures 130 are connected to each other, and at this time, the prism structures 130 outside the light source 110 are arranged in a zigzag shape, which enhances the light concentrating effect.
  • the prism structure 130 may be V-shaped, and the tip of the prism structure 130 faces away from the light source 110 and points to the light collecting area 50 .
  • the effect of locally increasing the light of the light source 110 can be better, thereby improving the shadow problem.
  • the different protruding structures 210 in the light concentrating structure 20 can scatter the concentrated light generated by the prism structure 130 to make the light intensity of the light concentrating area 50 uniform and avoid the light concentrating effect caused by the prism structure 130
  • the concentration of light intensity in the light-focusing area 50 is caused, and through the light-condensing structure 20 and the prism structure 130, the light in the light-condensing area 50 can be made uniform, and the light intensity of the light source 110 in the light-focusing area 50 can also be increased, so that The light intensity of the light-gathering area 50 on the optical film 30 is consistent with that of other positions on the optical film 30 , so that the light is uniformly emitted from the optical film 30 .
  • the backlight module 100 also includes a reflective layer 60 . Both ends of the reflective layer 60 are respectively connected to two adjacent substrates 120 .
  • the reflective layer 60 has the function of reflecting light, thereby preventing the light at the splicing gap 40 from being too dark. Specifically, white colloid can be sprayed at the position of the splicing gap 40 to fill the gap 40, and then the light irradiated on the splicing gap 40 will not be directly emitted from the splicing gap 40, but will be reflected by the white colloid and reflected to on the optical film 30. Wherein, the surface of the reflective layer 60 close to the diffuser is smooth, which is beneficial to light reflection.
  • the optical film 30 includes a prism sheet 320 and a diffusion sheet 310 .
  • the substrate of the diffusion sheet 310 needs to be made of a material with high light transmittance.
  • the diffusion sheet 310 is used to scatter the light emitted by the light source 110 .
  • the prism sheet 320 has the function of concentrating light, which can increase the directionality of the outgoing light source 110 and the intensity of the light emitted by the light source 110 , thereby increasing the brightness of the display panel.
  • the embodiment of the present application also provides a display device, which includes the backlight module 100 described in any one of the above and a display panel, and the display panel and the backlight module 100 are arranged opposite to each other.

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Planar Illumination Modules (AREA)

Abstract

一种背光模组（100）和显示装置。其中，背光模组（100）包括：多个相互间隔设置的发光单元（10），相邻的两个发光单元（10）具有缝隙（40）；光学膜片（30），光学膜片（30）设置在发光单元（10）的一侧；聚光结构（20），聚光结构（20）设置在光学膜片（30）靠近发光单元（10）的一侧，且聚光结构（20）位于与缝隙（40）相对的区域，聚光结构（20）包括多个不同的凸出结构（210）。

Description

背光模组和显示装置 技术领域
本申请涉及显示技术领域，尤其涉及一种背光模组和显示装置。
 背景技术
随着LED技术的不断发展，Mini LED作为一种新型技术应用于手机、车载、笔记本等上面。Mini LED技术的直下背光源的有数千颗、数万颗，甚至更多的Mini LED灯珠，其亮度得到了很大的提升，同时每颗Mini LED都可以由PCB板单独控制亮和暗，显示屏的HDR精细度达到前所未有水平。
 技术问题
然而，因为制作工艺难度及良率问题，Mini LED无法将数千颗或数万颗都做在一块电路板上，只能通过将LED做在多块电路板上，通过拼接的方式将几块电路板拼接在一起。然而拼接的位置无法完全重合在一起，会存在微小的缝隙，而拼接缝隙存在发光不均匀的问题。
 技术解决方案
本申请实施例提供一种背光模组，包括:
多个相互间隔设置的发光单元，相邻的两个所述发光单元具有缝隙；
光学膜片，所述光学膜片设置在所述发光单元的一侧；
聚光结构，所述聚光结构设置在所述光学膜片靠近所述发光单元的一侧，且所述聚光结构位于与所述缝隙相对的区域，所述聚光结构包括多个不同的凸出结构。
本申请实施例还提供一种显示装置，包括：
显示面板和如上述任一项所述的背光模组，所述显示面板与所述背光模组相对设置。
 有益效果
本申请实施例的背光模组通过设置在相邻的发光单元之间的缝隙处的聚光结构，使得发光单元发出的光线发射到聚光结构后，聚光结构中的凸出结构可以使光线发生折射，进而可以扩大光线射向光学膜片的走向，使得光学膜片上对应缝隙处的区域发光均匀，并且由于聚光结构为多个不同的凸出结构，可以使光线在该区域不会发生由于相干干涉导致的摩尔纹。
 附图说明
图1为本申请实施例提供的背光模组的第一种结构示意图；
图2为图1所示的背光模组中聚光结构的第一种结构示意图；
图3为图1所示的背光模组中聚光结构的第二种结构示意图；
图4为图1所示的背光模组中聚光结构的第三种结构示意图；
图5为图1所示的背光模组中聚光结构的第四种结构示意图；
图6为图1所示的背光模组中聚光结构的第五种结构示意图；
图7为本申请实施例提供的背光模组的第二种结构示意图。
 本发明的实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述。显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
在本申请的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”、“顺时针”、“逆时针”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个所述特征。在本申请的描述中，“多个”的含义是两个或两个以上，除非另有明确具体的限定。
拼接屏技术目前已经普遍应用于大尺寸显示屏制作中，拼接屏市场应用面广，可应用于商显、户外、安全监控等。现有的拼接屏多以多个子显示面板进行拼接，而相邻两个子显示面板在拼接区总是会出现不能显示的区域，即所谓的缝隙，简称拼缝。拼缝处的光线较其它位置的光线较弱，从而在缝隙处与其它地方形成明显的亮暗对比，产生暗影；此外，不同电路板间还会产生拼接公差，使LED无法完全一一对应，产生混光现象，使得显示屏发出的光线不均匀。
因此，为了解决上述问题，本申请提出了一种背光模组和显示装置。下面结合附图和实施方式对本申请作进一步说明。
请参阅图1，图1为本申请实施例提供的背光模组的结构示意图。本申请实施例提供一种背光模组100，该背光模组100包括多个相互间隔设置的发光单元10、光学膜片30和聚光结构20。其中，相邻的两个发光单元10具有缝隙40，光学膜片30设置在发光单元10的一侧，聚光结构20设置在光学膜片30靠近发光单元10的一侧，且聚光结构20位于与缝隙40相对的区域，聚光结构20包括多个不同的凸出结构210，其中，凸出结构210用于将发光单元10的光线从光学膜片30均匀射出。本申请实施例通过设置在相邻的发光单元10之间的缝隙40处的聚光结构20，使得发光单元10发出的光线发射到聚光结构20后，聚光结构20中的凸出结构210可以使光线发生折射，进而可以扩大光线射向光学膜片30的走向，使得光学膜片30上对应缝隙40处的区域发光均匀，并且由于聚光结构20为多个不同的凸出结构210，可以使光线在该区域不会发生由于相干干涉导致的摩尔纹。
其中，为了方便叙述，将光学膜片30上与缝隙40正对的区域定义为聚光区域50。
可以理解的是，多个不同的凸出结构210可以为至少一个凸出结构210的大小与其余的凸出结构210的大小不同。示例性的，如图2所示，图2为图1所示的背光模组中聚光结构的第一种结构示意图。聚光结构20包括第一凸出结构211和多个第二凸出结构212，其中，第一凸出结构211的形状和第二凸出结构212的形状相同，第一凸出结构211在光学膜片30上的正投影长度与第二凸出结构212在光学膜片30上的正投影长度不同。在一些实施例中，聚光结构20包括多个第一凸出结构211和多个第二凸出结构212，其中，第一凸出结构211的形状和第二凸出结构212的形状相同，第一凸出结构211在光学膜片30上的正投影长度与第二凸出结构212在光学膜片30上的正投影长度不同。在其他一些实施例中，聚光结构20包括多个大小不一样的凸出结构210，其中，第一凸出结构211的形状和第二凸出结构212的形状相同，每个凸出结构210在光学膜片30上的正投影长度不相同。本申请实施例通过将聚光结构20设置成包括多个不同的凸出结构210，通过不规则的结构分布，可以扩大光路的走向，使得光线在聚光区域50的分布更加均匀，另外，由于聚光结构20为不规则的结构分布，光线在该处不会发生由于相干干涉导致的摩尔纹。
在一些实施例中，多个不同的凸出结构210可以为至少一个凸出结构210的形状与其余的凸出结构210的形状不同。如图3所示，图3为图1所示的背光模组100中聚光结构20的第二种结构示意图。示例性的，聚光结构20包括第一凸出结构211和多个第二凸出结构212，其中，第一凸出结构211在光学膜片30上的正投影长度与第二凸出结构212在光学膜片30上的正投影长度相同，第一凸出结构211的形状和第二凸出结构212的形状不相同，例如，第一凸出结构的形状为三角形，第二凸出结构的形状为梯形。或者第一凸出结构的形状为直角三角形，第二凸出结构的形状为等边三角形。又或者第一凸出结构的形状为三角形，第二凸出结构的形状为圆台等等。在一些实施例中，聚光结构20包括多个形状不相同的凸出结构210。需要说明的是，凸出结构210的形状可以是任意类型的三角形、梯形、圆台或者任意形状的凸起中的一种，在此不做具体的限制，只需满足至少一个凸出结构210的形状与其余的凸出结构210的形状不同即可。
在一些实施例中，多个不同的凸出结构210可以为至少一个凸出结构210的大小与其余的凸出结构210的大小不同且至少一个凸出结构210的形状与其余的凸出结构210的形状不同。如图4所示，图4为图1所示的背光模组100中聚光结构20的第三种结构示意图。示例性的，凸出结构210包括第一凸出结构211、第二凸出结构212和第三凸出结构213，在一些实施例中，第一凸出结构的形状和第二凸出结构的形状不同且第一凸出结构的大小和第二凸出结构的大小不同。在一些实施例中，第一凸出结构的形状和第二凸出结构的形状相同，但第一凸出结构的大小和第二凸出结构的大小不同，第三凸出结构的形状和第二凸出结构的形状不相同，但第一凸出结构的大小和第二凸出结构的大小相同。在一些实施例中，第一凸出结构的形状、第二凸出结构的形状和第三凸出结构的形状不相同，且第一凸出结构的大小、第二凸出结构的大小和第三凸出结构的大小不同。通过设置不同大小和形状的凸出结构210可以使发光单元10发出的光线在凸出结构210上不会发生由于相干干涉导致的摩尔纹，并且可以使得在聚光区域50内的光线更加均匀。
需要说明的是，相邻的两个凸出结构210之间的距离不全相等。请参阅图5，图5为图1所示的背光模组中聚光结构的第四种结构示意图。示例性的，凸出结构210包括相邻设置的第一凸出结构、第二凸出结构、第三凸出结构和第四凸出结构，且第一凸出结构和第二凸出结构之间的距离为第一距离D1，第二凸出结构和第三凸出结构之间的距离为第二距离D2，第三凸出结构和第四凸出结构之间的距离为第三距离D3。在一些实施例中，第一距离和第二距离不相等，第三距离和第一距离或第二距离相等。在一些实施例中，第一距离、第二距离和第三距离均不相等。通过将相邻的两个凸出结构210之间的距离设置不全相等，可以调节不同凸出结构210在光学膜片30上的排列，进而可以减小摩尔纹的产生。
请继续参阅图6，图6为图1所示的背光模组中聚光结构的第五种结构示意图。聚光结构20上还包括衬底220，衬底220靠近发光单元10的一侧设置有多个凸出结构210，衬底220上设置有多个颗粒230，颗粒230用于将从凸出结构210射出的光线产生漫反射后射出至光学膜片30。
在一些实施例中，多个颗粒230中至少一个颗粒230的大小与其余的颗粒230的大小不同。大小不一样的颗粒230可以更好的提高发光单元10发出光线的漫反射，以提高光学膜片30上对应缝隙40处的区域发光的均匀度。
在一些实施例中，颗粒230在衬底220上单位面积内分布的数量不全相同。通过将颗粒230在衬底220上分布的密度设置不一样，可以使光线在颗粒230上的漫反射效果更好，以提高光学膜片30上对应缝隙40处的区域发光的均匀度。
颗粒230可以是具有散色光作用的颗粒230，例如二氧化硅粒子等等。
本申请实施例中的发光单元10发出的光线射向至聚光结构20，一部分光线通过聚光结构20中多个不同的凸出结构210发生折射，扩大了光线在聚光区域50的走向，一部分光线从不同的凸出结构210之间的连接处射入聚光区域50。当光线射入后遇到颗粒230，会进一步的发生漫反射，增大出光角度，进而扩大光线的均匀性效果。
请继续参阅图7，图7为本申请实施例提供的背光模组的第二种结构示意图。发光单元10包括基板120和光源110，光源110设置在基板120远离光学膜片30的一侧，发光的光源110可以认为是点光源110，光源110也可以是一个或一个以上的发光体，如发光二极管、灯泡等，由该光源110发出显示面板所需要的光源110，光源110通过光学膜片30后，光学膜片30能够将光源110发出的光进行散射，使得光源110发出的光能够均匀射出，为显示面板提供一光线均匀的面光源110。
其中，背光模组100可以为Mini LED背光模组100，而基板120可以为PCB板，多个PCB板拼接形成Mini LED板，光源110为Mini LED，Mini LED板上设置有多个Mini LED。
在一些实施例中，为了减缓缝隙40处光线较其它位置较弱，形成明显的亮暗对比，产生暗影的情况，会在光源110靠近缝隙40的一侧设置有棱镜结构，即在距离缝隙40最近的Mini LED上设置棱镜结构130，示例性的，Mini LED包括第一侧和第二侧，其中第一侧为靠近缝隙40的一侧，第二侧为背离缝隙40的一侧，可以在第一侧的部分或全部设置棱镜结构130，棱镜结构130用于将光源110的光线聚集于聚光结构20上。
可以理解的是，棱镜结构130的数量至少为两个，棱镜结构130并列设置于光源110的外部，多个棱镜结构130可以增加光源110在聚光区域50的光照强度，使得在光学膜片30上聚光区域50的光线强度与光学膜片30上其他位置的光线强度一致，以使得光线从光学膜片30均匀射出。在一些实施例中，多个棱镜结构130彼此相连接，此时，光源110外部的棱镜结构130排列形成锯齿形，增强了聚光效果。
棱镜结构130可以呈V型，且棱镜结构130的尖端背离光源110，并指向聚光区域50。可以更好的将光源110的光线局部增量的效果，从而改善暗影问题。
本申请实施例提供的聚光结构20中不同的凸出结构210可以将棱镜结构130产生的聚光进行散射，使聚光区域50的光线强度均匀化，避免因为棱镜结构130产生的聚光效果导致聚光区域50的光线强度集中的情况，且通过聚光结构20和棱镜结构130，既可以使得聚光区域50的光线均匀化，也可以增加光源110在聚光区域50的光照强度，使得在光学膜片30上聚光区域50的光线强度与光学膜片30上其他位置的光线强度一致，以使得光线从光学膜片30均匀射出。
背光模组100还包括反射层60，反射层60的两端分别连接于相邻的两个基板120，反射层60具有反射光线的作用，进而能够避免拼接缝隙40处的光线过暗。具体地，可以在拼接缝隙40的位置喷涂白色胶体，用来填充缝隙40，进而照射在拼接缝隙40处的光线不会从拼接缝隙40处直接射出，而是会经过白色胶体的反射，反射到光学膜片30上。其中，反射层60靠近扩散片的一侧表面光滑，有利于光线的反射。
光学膜片30包括棱镜片320和扩散片310，扩散片310的基材需选择光透过率高的材料，扩散片310用于将光源110发出的光进行散射。棱镜片320具有聚光的作用，能够增加出射光源110的方向性及将该光源110射出的光线的光强增加，增加显示面板的亮度。
本申请实施例还提供一种显示装置，该显示装置包括上述任一项所述的背光模组100以及显示面板，显示面板和背光模组100相对设置。
以上对本申请实施例提供的一种背光模组和显示装置进行了详细介绍。本文中应用了具体条例对本申请的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本申请。同时，对于本领域的技术人员，依据本申请的思想，在具体实施方式及应用范围上均会有改变之处，综上，本说明书内容不应理解为对本申请的限制。

Claims (20)

  1. 一种背光模组，其中，包括:
    多个相互间隔设置的发光单元，相邻的两个所述发光单元具有缝隙；
    光学膜片，所述光学膜片设置在所述发光单元的一侧；
    聚光结构，所述聚光结构设置在所述光学膜片靠近所述发光单元的一侧，且所述聚光结构位于与所述缝隙相对的区域，所述聚光结构包括多个不同的凸出结构。
  2. 根据权利要求1所述的背光模组，其中，至少一个所述凸出结构的大小与其余的所述凸出结构的大小不同。
  3. 根据权利要求1所述的背光模组，其中，至少一个所述凸出结构的形状与其余的所述凸出结构的形状不同。
  4. 根据权利要求1所述的背光模组，其中，至少一个所述凸出结构的大小与其余的所述凸出结构的大小不同，且至少一个所述凸出结构的形状与其余的所述凸出结构的形状不同。
  5. 根据权利要求1所述的背光模组，其中，相邻的两个所述凸出结构之间的距离不全相等。
  6. 根据权利要求1所述的背光模组，其中，所述聚光结构上还包括衬底，所述衬底靠近所述发光单元的一侧设置有多个所述凸出结构，所述衬底上设置有多个颗粒，所述颗粒用于将从所述凸出结构射出的光线产生漫反射后射出至所述光学膜片。
  7. 根据权利要求6所述的背光模组，其中，至少一个所述颗粒的大小与其余的所述颗粒的大小不同。
  8. 根据权利要求6所述的背光模组，其中，所述颗粒在所述衬底上单位面积内分布的数量不全相同。
  9. 根据权利要求1所述的背光模组，其中，所述发光单元包括基板和光源，所述光源设置在所述基板远离所述光学膜片的一侧，所述光源靠近所述缝隙的一侧设置有棱镜结构，所述棱镜结构用于将所述光源的光线聚集于所述聚光结构上。
  10. 根据权利要求9所述的背光模组，其中，所述棱镜结构呈V型，且所述棱镜结构的尖端背离所述光源。
  11. 根据权利要求9所述的背光模组，其中，所述缝隙处设置有反射层，所述反射层的两端分别连接于相邻的两个所述基板。
  12. 根据权利要求1所述的背光模组，其中，所述光学膜片包括棱镜片和扩散片，所述扩散片上设置有所述聚光结构，所述棱镜片设置在所述扩散片远离所述聚光结构的一侧。
  13. 一种显示装置，其中，包括：
    显示面板和背光模组，所述显示面板与所述背光模组相对设置，其中，所述背光模组包括：
    多个相互间隔设置的发光单元，相邻的两个所述发光单元具有缝隙；
    光学膜片，所述光学膜片设置在所述发光单元的一侧；
    聚光结构，所述聚光结构设置在所述光学膜片靠近所述发光单元的一侧，且所述聚光结构位于与所述缝隙相对的区域，所述聚光结构包括多个不同的凸出结构。
  14. 根据权利要求13所述的显示装置，其中，至少一个所述凸出结构的大小与其余的所述凸出结构的大小不同。
  15. 根据权利要求13所述的显示装置，其中，至少一个所述凸出结构的形状与其余的所述凸出结构的形状不同。
  16. 根据权利要求13所述的显示装置，其中，至少一个所述凸出结构的大小与其余的所述凸出结构的大小不同，且至少一个所述凸出结构的形状与其余的所述凸出结构的形状不同。
  17. 根据权利要求13所述的显示装置，其中，相邻的两个所述凸出结构之间的距离不全相等。
  18. 根据权利要求13所述的显示装置，其中，所述聚光结构上还包括衬底，所述衬底靠近所述发光单元的一侧设置有多个所述凸出结构，所述衬底上设置有多个颗粒，所述颗粒用于将从所述凸出结构射出的光线产生漫反射后射出至所述光学膜片。
  19. 根据权利要求18所述的显示装置，其中，至少一个所述颗粒的大小与其余的所述颗粒的大小不同。
  20. 根据权利要求18所述的显示装置，其中，所述颗粒在所述衬底上单位面积内分布的数量不全相同。
PCT/CN2021/139290 2021-12-10 2021-12-17 背光模组和显示装置 WO2023103051A1 (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US17/622,774 US20240036397A1 (en) 2021-12-10 2021-12-17 Backlight module and display device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202111509965.X 2021-12-10
CN202111509965.XA CN114187835A (zh) 2021-12-10 2021-12-10 背光模组和显示装置

Publications (1)

Publication Number Publication Date
WO2023103051A1 true WO2023103051A1 (zh) 2023-06-15

Family

ID=80543219

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2021/139290 WO2023103051A1 (zh) 2021-12-10 2021-12-17 背光模组和显示装置

Country Status (3)

Country Link
US (1) US20240036397A1 (zh)
CN (1) CN114187835A (zh)
WO (1) WO2023103051A1 (zh)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115472095B (zh) * 2022-08-25 2024-02-09 惠科股份有限公司 显示装置及其制备方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010217660A (ja) * 2009-03-18 2010-09-30 Victor Co Of Japan Ltd 光学ユニット、バックライト装置、液晶モジュール、及び液晶ディスプレイ
CN209591361U (zh) * 2019-04-24 2019-11-05 京东方科技集团股份有限公司 一种背光结构及显示模组
CN110703495A (zh) * 2019-09-17 2020-01-17 武汉华星光电技术有限公司 背光模组和显示装置
CN111445789A (zh) * 2020-04-27 2020-07-24 Tcl华星光电技术有限公司 显示装置及拼接装置
CN112002217A (zh) * 2020-09-10 2020-11-27 上海中航光电子有限公司 拼接式背光模组和显示装置
CN113327515A (zh) * 2021-05-26 2021-08-31 Tcl华星光电技术有限公司 Mini-LED背光模组及显示装置
CN114267261A (zh) * 2021-12-22 2022-04-01 绵阳惠科光电科技有限公司 拼接式背光模组及其组装方法和拼接显示装置

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104375236B (zh) * 2014-11-26 2017-10-24 深圳市华星光电技术有限公司 导光板、背光模组及显示器
CN106842701B (zh) * 2017-01-11 2020-05-19 深圳市华星光电技术有限公司 一种背光模组和液晶显示器
CN109061945B (zh) * 2018-08-23 2021-09-17 厦门天马微电子有限公司 背光模组和显示装置
CN109283745B (zh) * 2018-11-29 2022-03-01 厦门天马微电子有限公司 一种直下式背光模组及显示装置
CN109709720B (zh) * 2019-02-25 2022-06-03 京东方科技集团股份有限公司 背光模组和显示装置
CN110456564A (zh) * 2019-07-30 2019-11-15 武汉华星光电技术有限公司 背光模组及显示装置
CN111487708B (zh) * 2020-04-24 2022-07-05 京东方科技集团股份有限公司 一种侧入式背光模组、液晶显示装置
CN214954432U (zh) * 2021-02-25 2021-11-30 台湾扬昕股份有限公司 光学复合膜及光源模块
CN113721385B (zh) * 2021-08-18 2024-07-09 安徽芯瑞达科技股份有限公司 一种均匀出光的Mini LED芯片背光模组

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010217660A (ja) * 2009-03-18 2010-09-30 Victor Co Of Japan Ltd 光学ユニット、バックライト装置、液晶モジュール、及び液晶ディスプレイ
CN209591361U (zh) * 2019-04-24 2019-11-05 京东方科技集团股份有限公司 一种背光结构及显示模组
CN110703495A (zh) * 2019-09-17 2020-01-17 武汉华星光电技术有限公司 背光模组和显示装置
CN111445789A (zh) * 2020-04-27 2020-07-24 Tcl华星光电技术有限公司 显示装置及拼接装置
CN112002217A (zh) * 2020-09-10 2020-11-27 上海中航光电子有限公司 拼接式背光模组和显示装置
CN113327515A (zh) * 2021-05-26 2021-08-31 Tcl华星光电技术有限公司 Mini-LED背光模组及显示装置
CN114267261A (zh) * 2021-12-22 2022-04-01 绵阳惠科光电科技有限公司 拼接式背光模组及其组装方法和拼接显示装置

Also Published As

Publication number Publication date
US20240036397A1 (en) 2024-02-01
CN114187835A (zh) 2022-03-15

Similar Documents

Publication Publication Date Title
CN106773315B (zh) 背光模组及液晶显示器
CN101097349B (zh) 背光组件及采用其的液晶显示器件
US6805468B2 (en) Surface light source device and liquid crystal display device using it
KR101396658B1 (ko) 광원 큐브 및 이를 이용한 평면 광원 장치 및 액정 표시장치
US9341766B2 (en) Lighting device, display device and television device
CN106842701B (zh) 一种背光模组和液晶显示器
US20120013811A1 (en) Lighting device, display device and television receiver
JP5127851B2 (ja) 面状照明装置およびこれを備えた液晶表示装置
JP2005142128A (ja) 面光源装置及び当該装置を用いた機器
KR102266737B1 (ko) 렌즈, 렌즈를 포함하는 발광 장치, 및 발광 장치를 포함하는 백 라이트 유닛
WO2023184582A1 (zh) 背光模组及显示装置
WO2012012988A1 (zh) 导光板及背光模组
CN103968300A (zh) 一种背光源和显示装置
CN109164638B (zh) 发光模组及其制造方法、直下式背光源
WO2020147213A1 (zh) 支撑结构、背光单元和显示面板
CN110221479A (zh) 一种背光模组及显示装置
WO2023103051A1 (zh) 背光模组和显示装置
KR101186868B1 (ko) 백라이트 및 이를 구비한 액정표시소자
JP2012204025A (ja) Ｌｅｄ光源装置および液晶表示装置
TWI808652B (zh) 背光模組及顯示器
TWI776581B (zh) 直下式背光模組及其顯示器
US9086592B2 (en) Direct illumination type backlight module, bottom reflector and liquid crystal display
JP2007059146A (ja) バックライト装置及び液晶表示装置
JP2013037783A (ja) 照明装置および表示装置
CN110032003B (zh) 一种发光二极管、背光模组及显示装置

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 17622774

Country of ref document: US

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 21966964

Country of ref document: EP

Kind code of ref document: A1