WO2018120305A1 - 背光模组和液晶显示器 - Google Patents

背光模组和液晶显示器 Download PDF

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Publication number
WO2018120305A1
WO2018120305A1 PCT/CN2017/071158 CN2017071158W WO2018120305A1 WO 2018120305 A1 WO2018120305 A1 WO 2018120305A1 CN 2017071158 W CN2017071158 W CN 2017071158W WO 2018120305 A1 WO2018120305 A1 WO 2018120305A1
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WIPO (PCT)
Prior art keywords
light
light guide
fixing bracket
plate
backlight module
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/CN2017/071158
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English (en)
French (fr)
Inventor
阙成文
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TCL China Star Optoelectronics Technology Co Ltd
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Shenzhen China Star Optoelectronics Technology Co Ltd
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Publication of WO2018120305A1 publication Critical patent/WO2018120305A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0086—Positioning aspects
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0086—Positioning aspects
    • G02B6/0091—Positioning aspects of the light source relative to the light guide
    • 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
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side

Definitions

  • the present application relates to the field of liquid crystal manufacturing technologies, and in particular, to a backlight module and a liquid crystal display having the same.
  • the side-entry backlight module is provided with a light source on the periphery of the liquid crystal panel, and then is combined with the light guide plate to transmit the light emitted from the edge of the panel to the central area of the panel through the light guide plate.
  • the side-in backlight module diffuses the backlight through a light guide plate, and the conduction of light in the light guide plate is not controllable, and the local brightness control of the screen cannot be realized, and the multi-partition function design cannot be achieved.
  • the present application provides a backlight module and a liquid crystal display having the same, which can realize partial brightness control of the screen, and make the product thinner and improve the appearance quality.
  • the light guide plate array includes a back plate and a back plate disposed on the back plate; the light guide plate array includes at least two light guide plates disposed side by side, and two opposite sides of each of the light guide plates are light incident surfaces, and each of the two light guide plates a first light-emitting component is disposed between the light-incident surfaces of the adjacent light-guiding plates; the first light-emitting component includes a circuit board, a light source disposed on the circuit board, and a first fixing bracket, The first fixing bracket is fixedly connected to two adjacent light guiding plates on both sides thereof; the outer side of the light guiding plate array is provided with a second lighting component, and the second lighting component is the outermost side of the light guiding plate array The light guide plate provides incident light.
  • the light emitting directions of the plurality of the light sources in the first light emitting component are all uniform, and one of the first light emitting components provides incident light one-to-one with one of the light guide plates adjacent thereto.
  • the light-emitting directions of the plurality of the light sources in the first light-emitting component are disposed to intersect each other such that the first light-emitting component provides incident light to two adjacent light guide plates on both sides thereof.
  • the second illuminating assembly includes a circuit board and a light source and a second fixing bracket disposed on the circuit board, and the second fixing bracket is fixedly connected to the outermost light guiding plate of the optical ray array.
  • the first fixing bracket and the second fixing bracket respectively include a top board and a side board protruding from the top board; the first top board has a first surface, and the first one of the first fixing brackets The surface is adhered to one of the two adjacent light guide plates, and the first surface of the second fixing bracket is adhered to the outermost light guide plate of the light guide plate array; the side plate is away from the side plate One end of the top plate is connected to the circuit board, the first side plate has a second surface, and the second surface is constricted within an edge of the first surface; the first surface and the first surface The two surfaces are connected at an angle to form a first fastening portion; the first fastening portion of the first fixing bracket is engaged with one of the two adjacent light guiding plates, and the second fixing bracket is The first fastening portion is engaged with the outermost light guide plate of the light guide plate array.
  • An elastic arm is disposed on the top plate, and a second fastening portion is disposed at an end of the elastic arm away from the top plate, and the second fastening portion and the first fastening portion are respectively located on the top plate.
  • the second fastening portion of the first fixing bracket is engaged with the other of the two adjacent light guiding plates on opposite sides.
  • first fixing bracket and the second fixing bracket are made of a transparent material.
  • the top plate is provided with a support portion, and the support portion and the side plate are respectively located on opposite sides of the top plate; the diffusion portion and the optical film are sequentially supported on the support portion.
  • a reflective sheet is disposed between each of the light guide plates and the back plate.
  • a liquid crystal display comprising the above backlight module.
  • the light sources on one side of each light guide plate can be separately controlled, and the brightness of the light source on one side of each light guide plate can be finely adjusted, thereby performing local brightness adjustment on the entire screen, thereby realizing multi-partition function design and dynamic intelligence.
  • Backlighting The liquid crystal display using the backlight module has a high contrast image display effect, and the product grade is improved. Since the light guide plate is light-introduced on the side surface, the light source is disposed on the side of the light guide plate, and does not occupy the structural space above the light guide plate, so that the backlight module and the liquid crystal display can be thinned and the appearance quality of the product can be improved.
  • the fixing bracket can be used for splicing and fixing the light guide plate to ensure the splicing structure of the light guide plate is stable, and the stable light is ensured.
  • FIG. 1 is a schematic exploded view of a backlight module according to a first embodiment of the present application
  • FIG. 2 is a schematic view showing the assembled structure of a part of the light guide plate, the light source, and the circuit board assembly of FIG. 1 through a fixing bracket;
  • Figure 3 is a partial enlarged structural view of I in Figure 2;
  • FIG. 4 is a schematic view showing the assembled structure of the light source, the circuit board assembly and the fixing bracket on the right side of the outermost light guide plate of FIG. 2;
  • Figure 5 is a schematic view showing the structure of the fixing bracket of Figure 4 in one direction;
  • Figure 6 is a structural schematic view of the fixing bracket of Figure 4 in another direction;
  • FIG. 7 is a schematic view showing the assembled structure of a backlight module according to a second embodiment of the present application.
  • the following embodiments of the present application provide a backlight module and a liquid crystal display having the same.
  • the backlight module 10 of the first embodiment of the present application includes a back plate 15 and a light guide plate array 13 disposed on the back plate 15 .
  • the light guide plate array 13 includes at least two light guide plates arranged side by side. The two opposite sides of each of the light guide plates are light incident surfaces, and a first light emitting assembly is disposed between the light incident surfaces of each of the two adjacent light guide plates.
  • the first light emitting component includes a circuit board and a light source and the first fixing bracket disposed on the circuit board. The first fixing bracket is fixedly connected to two adjacent light guiding plates on both sides thereof.
  • the outer side of the light guide plate array is provided with a second light emitting component, and the second light emitting component provides incident light to the outermost light guide plate 133 of the light guide plate array 13.
  • FIG. 1 only five light guide plates arranged in the array of the light guide plate array 13 are shown in FIG. 1, and only four of the right side of each light guide plate are shown in FIG.
  • the first fixed bracket or the second fixed bracket, and a plurality of light sources are appropriately designed, and the light source and the second fixing bracket are disposed on the left side of the light guide plate array.
  • FIGS. 1 and 2 only the light guide plates 131 to 133, the light sources 171 and 172, and the first fixing bracket 161 and the second fixing bracket 162 are indicated for illustrative purposes.
  • the side surface 1321 of the light guide plate 132 and the side surfaces 1331 and 1332 of the light guide plate 133 are all light incident surfaces, that is, the light incident surface direction is perpendicular to the thickness direction of the light guide plate.
  • the definition of the illuminating surface is also applicable to other unmarked light guides.
  • a first light-emitting component (not shown) is disposed between the light-incident surface of the light guide plate 132 (ie, the side surface 1321) and the light-incident surface of the light guide plate 133 (ie, the side surface 1331).
  • the first light emitting assembly includes a circuit board 181, a light source 171 disposed on the circuit board 181, and a first fixing bracket 161.
  • the first fixing bracket 161 is fixedly connected to the adjacent light guide plate 132 and the light guide plate 133 for splicing the light guide plates 132 and 133, and integrally fixes the light guide plates 132 and 133 with the circuit board 181.
  • a second light-emitting component (not shown) is disposed on the right side of the light guide plate 133.
  • the second light emitting component provides incident light to the light guide plate 133, that is, the overall light emitting direction of the second light emitting component faces the side surface 1332 of the light guide plate 133.
  • the second light-emitting component and the component of the first light-emitting component and the structure of each of the corresponding components are completely identical.
  • the second light emitting assembly includes a circuit board 182, a light source 172 disposed on the circuit board 182, and a second fixing bracket 162, wherein the circuit board 182 is identical in structure to the circuit board 181; the light source 172 is identical in structure to the light source 171;
  • the fixing bracket 162 has the same structure as the first fixing bracket 161, and the second fixing bracket 162 is used for fixing the light guiding plate 133 and the circuit board 182 integrally.
  • the second light-emitting component and the first light-emitting component having the same structure are disposed to facilitate simplification of product design.
  • the second lighting component may be different from the structural form of the first lighting component.
  • the second lighting assembly may not include a second fixing bracket, and the light source in the second lighting assembly may be different from that in the first lighting assembly.
  • the second light emitting component is a one-way light.
  • the light source 172 and the light source in the same row as the light source 172 emit light to the left, and the incident light enters the light guide plate 133 from the side surface 1332 of the light guide plate 133.
  • the first light emitting component may be a one-way light.
  • the second light-emitting component emits light to the left
  • the light-emitting directions of the respective light sources in the first light-emitting component are Consistent, and all outgoing to the left.
  • one of the first light-emitting components can provide incident light one-to-one for one of the light guide plates adjacent thereto.
  • the light source 171 in the first light-emitting assembly and the light source in the same row as the light source 171 are all emitted to the left, and the incident light enters the light guide plate 132 from the side surface 1321 of the light guide plate 132.
  • each of the light guide plates and the light source on the right side thereof form a light guiding unit with light rays, and each of the light guiding units cooperate to generate a backlight.
  • the first light emitting component may be bidirectional light.
  • the light-emitting directions of the plurality of light sources in the first light-emitting component are arranged to be intersected, that is, a part of the light sources in the first light-emitting component emit light toward the left, and another part of the light source emits light toward the right, so that the first light-emitting component can be two Two adjacent light guide plates on the side provide incident light.
  • the light source 171 in the first light-emitting component emits light toward the left, and the incident light rays enter the light guide plate 132 from the side surface 1321 of the light guide plate 132; and some other light sources in the same column as the light source 171 emit light toward the right, and the incident light rays are incident from the light source 171.
  • the side surface 1331 of the light guide plate 133 is incident on the light guide plate 133.
  • the light source that emits light toward the left and the light source that emits light toward the right are alternately spaced to provide uniform incident light to the two adjacent light guide plates.
  • the light sources on the side of each light guide plate in the light guide plate array 13 can be separately controlled, and the brightness of each column light source can be finely adjusted, so that the local brightness adjustment can be performed on the entire screen to realize multi-partition function design and dynamic intelligence.
  • Backlighting The liquid crystal display using the backlight module 10 has a high contrast image display effect, and the product grade is improved. Since the light guide plate is light-introduced on the side surface, the light source is disposed on the side of the light guide plate, and does not occupy the structural space above the light guide plate, so that the backlight module and the liquid crystal display can be thinned and the appearance quality of the product can be improved.
  • the circuit boards between two adjacent light guide plates are located under the two light guide plates at the same time.
  • the circuit board 181 is located under the light guide plates 132, 133 at the same time.
  • the circuit board 182 on the right side of the light guide plate 133 is only under the light guide plate 133.
  • a reflective sheet is disposed between each of the light guide plates and the back plate 15 .
  • reflective sheets 141 to 143 are provided between the light guide plates 131 to 133 and the back plate 15, respectively.
  • the reflective sheet is located above the circuit board and below the light guide plate. The function of the reflective sheet is to reflect the light escaping from the light guide plate to improve the utilization of light.
  • the light source is an LED (Light Emitting Diode), which has stable performance, short response time and high cost performance.
  • LED Light Emitting Diode
  • other electroluminescent devices such as CCFLs (Cold Cathode Fluorescent Tubes), may be used.
  • the first fixing bracket and the second fixing bracket are used for splicing and fixing the light guiding plate to ensure stable structure of the light guiding plate array 13 and ensure stable light emission. Since the first fixing bracket is used to fix the two side light guide plates, and the second fixing bracket only fixes the one side light guide plate, the structure of the first fixing bracket and the second fixing bracket may be different. Of course, the first fixing bracket and the second fixing bracket may be disposed in the same structure for the convenience of structural design and manufacturing.
  • the first fixing bracket is consistent with the structure of the second fixing bracket.
  • the following embodiment will take the first fixing bracket 161 as an example, and the preferred structure of the fixing bracket will be described in detail.
  • the first fixing bracket 161 includes a top plate 1611 and side plates 1612, 1613 protruding from the top plate 1611.
  • the side plates 1612 and 1613 extend downward, and one ends of the side plates 1612 and 1613 facing away from the top plate 1611 are connected to the circuit board 181.
  • the side panels 1612, 1613 can be secured to the circuit board 181 by screw or glue bonding.
  • the top plate 1611 has a first surface A, and the first surface A is attached to the light guide plate 132.
  • the side plates 1612, 1613 respectively have second surfaces B2, B1 opposite the side faces 1332 of the light guide plate 132.
  • the second surface B2, B1 are all constricted within the edge of the top plate 1611, that is, within the edge of the first surface A, and the first surface A and the second surface B2, B1 are both connected at an angle to form two The first fastening portion and the two first fastening portions are both engaged with the light guide plate 132.
  • the first fixing bracket may be provided with only one side panel; or, the shape of the side panel is not limited to that shown in FIG. 3-7, as long as the first buckle portion can be formed with the top panel. Just fine.
  • the top plate 1611 is provided with a resilient arm 1611a.
  • the elastic arm 1611a is curved to facilitate the provision of elastic force.
  • the end of the top plate 1611 is provided with a second latching portion 1611d.
  • the second fastening portion 1611d and the first fastening portion are respectively located on opposite sides of the top plate 1611, and the second fastening portion 1611d is engaged with the light guide plate 133. That is, the first fixing bracket 161 located between the two adjacent light guiding plates 132 and 133 is respectively engaged with the light guiding plates 132 and 133 through the first fastening portion and the second fastening portion 1611d at both ends thereof.
  • the elastic arm can be shaped as needed, and need not be provided in a curved shape as long as it has an elastic force.
  • both ends of the first fixing bracket may be rigid buckles, each of which may be an elastic buckle, or one end is a rigid buckle and the other end is an elastic buckle.
  • a light source 171 is disposed under the first fixing bracket 161. To avoid blocking the light from the light source 171, the corresponding position on the first fixing bracket 161 is to be structurally avoided.
  • the first fixing bracket 161 may be made of a transparent material to avoid blocking light.
  • the top plate 1611 is provided with support portions 1611b and 1611c, and the support portions 1611b, 1611c and the side plates 1612 are respectively located on opposite sides of the top plate 1611.
  • the diffusion plate 12 and the optical film 11 are sequentially supported on the support portions 1611b and 1611c.
  • the shapes of the support portions 1611b and 1611c shown in FIG. 6 are merely illustrative, and the solution of the present application is not limited thereto.
  • the shape, number and distribution position of the support portion can be rationally designed as needed.
  • the support portions 1611b, 1611c have a height that provides sufficient diffusing height for the diffuser panel 12. Since the backlight module 10 adopts a light guiding structure with light entering, the light mixing height of the backlight module 10 is lower than that of the conventional direct type backlight module. Therefore, the backlight module 10 of the embodiment is also thinner than the conventional direct type backlight module.
  • the structure of the first fixing bracket 161 is described in detail above.
  • the second fixing bracket 162 has the same structure as the first fixing bracket 161, but the mounting position is different.
  • the first fastening portion of the second fixing bracket 162 is clamped with the light guide plate 133 to firmly hold the guide.
  • the light plate 133 is vacant with the second fastening portion of the second fixing bracket 162.
  • the structure of the second fixing bracket and the first fixing bracket may be different.
  • the second fixing bracket may only be provided with the first fastening portion, and the second fastening portion may not be provided.
  • Two different fixing brackets are designed to differently hold the light guide plates at different positions; or the structure of the second fixing bracket and the position where the first fixing bracket and the light guide plate are held is not limited to the present
  • the buckle form described in the embodiment can be set as needed; alternatively, the second fixing bracket can be omitted, and only the first fixing bracket is provided at this time.
  • the second light-emitting components are disposed on both outer sides of the light guide plate array of the backlight module 20 .
  • the second light-emitting component is disposed on the left side of the light guide plate 231, and the second light-emitting component emits light toward the right, and the incident light is incident on the light-incident surface on the left side of the light guide plate 231.
  • the second lighting assembly includes a second fixing bracket 261; the second lighting assembly is also disposed on the right side of the light guiding plate 231, and the second lighting assembly includes a second fixing bracket 262.
  • each light guide plate By providing a light source on both sides of each light guide plate, the amount of incident light can be increased, and each guide can be increased.
  • the uniformity of the amount of light entering the light plate; and the fixing brackets are distributed on both sides of each light guide plate, which can further ensure that the splicing structure of the light guide plate array is stable, further ensuring stable light output.

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

Abstract

一种背光模组(10)，包括背板(15)和平铺于所述背板(15)上的导光板阵列(13)；导光板阵列(13)包括至少两个并排设置的导光板(131,132,133)，每个导光板(131,132,133)的两个相对侧面(1321,1331,1332)均为入光面，每两个相邻导光板(132,133)的入光面(1321,1331)之间均设有第一发光组件；第一发光组件包括电路板(181)及设于电路板(181)上的光源(171)与第一固定支架(161)，第一固定支架(161)与其两侧的两个相邻导光板(132,133)均固定连接；导光板阵列(13)的外侧设有第二发光组件，第二发光组件为导光板阵列(13)中最外侧的导光板(133)提供入射光。还公开了具有背光模组(10)的液晶显示器，能够实现屏幕的局部亮度控制，并且使产品更薄，提升外观品质。

Description

背光模组和液晶显示器
本申请要求于2016年12月30日提交中国专利局、申请号为201611257756X、发明名称为“背光模组和液晶显示器”的中国专利申请的优先权，上述在先申请的内容以引入的方式并入本文本中。
技术领域
本申请涉及液晶制造技术领域，尤其涉及一种背光模组及具有所述背光模组的液晶显示器。
背景技术
侧入式的背光模组，在液晶面板的周缘设置光源，再搭配导光板，把从面板边缘发射的光透过导光板传送到面板的中央区域。但是，侧入式背光模组是通过一块导光板将背光扩散开，光线在导光板内的传导并不可控，无法实现屏幕的局部亮度控制，无法做到多分区功能设计。
发明内容
有鉴于此，本申请提供了一种背光模组及具有所述背光模组的液晶显示器，能够实现屏幕的局部亮度控制，并且使产品更薄，提升外观品质。
包括背板和平铺于所述背板上的导光板阵列；所述导光板阵列包括至少两个并排设置的导光板，每个所述导光板的两个相对侧面均为入光面，每两个相邻所述导光板的所述入光面之间均设有第一发光组件；所述第一发光组件包括电路板及设于所述电路板上的光源与第一固定支架，所述第一固定支架与其两侧的两个相邻所述导光板均固定连接；所述导光板阵列的外侧设有第二发光组件，所述第二发光组件为所述导光板阵列中最外侧的所述导光板提供入射光。
其中，所述第一发光组件中的多个所述光源的出光方向均一致，且一个所述第一发光组件为与其相邻的一个所述导光板一对一地提供入射光。
其中，所述第一发光组件中的多个所述光源的出光方向交叉设置，以使所述第一发光组件为其两侧的两个相邻所述导光板提供入射光。
其中，所述第二发光组件包括电路板及设于所述电路板上的光源与第二固定支架，所述第二固定支架与所述导光板阵列中最外侧的所述导光板固定连接。
其中，所述第一固定支架与所述第二固定支架均包括顶板及凸设在所述顶板上的侧板；所述第一顶板具有第一表面，所述第一固定支架中的第一表面与两个相邻所述导光板中的一个贴合，所述第二固定支架中的第一表面与所述导光板阵列中最外侧的所述导光板贴合；所述侧板上远离所述顶板的一端与所述电路板相连，所述第一侧板具有第二表面，所述第二表面内缩在所述第一表面的边线之内；所述第一表面与所述第二表面呈夹角相连以形成第一卡扣部；所述第一固定支架中的第一卡扣部与两个相邻所述导光板中的一个卡持，所述第二固定支架中的第一卡扣部与所述导光板阵列中最外侧的所述导光板卡持。
其中，所述顶板上设有弹性臂，所述弹性臂远离所述顶板的一端设有第二卡扣部，所述第二卡扣部与所述第一卡扣部分别位于所述顶板的相对两侧，所述第一固定支架中的所述第二卡扣部与两个相邻所述导光板中的另一个卡持。
其中，所述第一固定支架与所述第二固定支架由透明材料制成。
其中，所述顶板上设有支撑部，所述支撑部与所述侧板分别位于所述顶板的相对两面；所述支撑部上依次支撑有扩散板和光学膜片。
其中，每个所述导光板与所述背板之间设有反射片。
一种液晶显示器，包括上述的背光模组。
本申请的方案，各个导光板一侧的光源可分别单独控制，可以做到精细化调节每个导光板一侧的光源亮度，从而对整个屏幕进行局部亮度调整，实现多分区功能设计和动态智能背光。使用本背光模组的液晶显示器具有高对比度的图像显示效果，产品档次得到提升。由于导光板是侧面入光，光源设于导光板的侧面，不会占用导光板上方的结构空间，因此可以做到背光模组与液晶显示器的薄型化，提升产品外观品质。另外，使用固定支架能够对导光板进行拼接和固定，保证导光板的拼接结构稳固，确保稳定出光。
附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例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申请的一些实施例，对于本领域普通技术人员来讲，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是本申请第一实施例的背光模组的分解结构示意图；
图2是图1中部分导光板与光源、电路板组件通过固定支架拼接的组装结构示意图；
图3是图2中I处的局部放大结构示意图；
图4是图2中最外侧的导光板右侧的光源、电路板组件与固定支架的组装结构示意图；
图5是图4中的固定支架一个方向的结构示意图；
图6是图4中的固定支架另一个方向的结构示意图；
图7是本申请第二实施例的背光模组的组装结构示意图。
具体实施方式
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，本领域普通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。
本申请以下实施例提供了一种背光模组及具有所述背光模组的液晶显示器。
如图1和图2所示，本申请第一实施例的背光模组10包括背板15和平铺于背板15上的导光板阵列13。
其中，导光板阵列13包括至少两个并排设置的导光板。每个所述导光板的两个相对侧面均为入光面，每两个相邻所述导光板的所述入光面之间均设有第一发光组件。所述第一发光组件包括电路板及设于所述电路板上的光源与第一固定支架。所述第一固定支架与其两侧的两个相邻所述导光板均固定连接。所述导光板阵列的外侧设有第二发光组件，所述第二发光组件为导光板阵列13中最外侧的导光板133提供入射光。
本实施例中，为了简洁描述以突出重点，图1中仅示出了导光板阵列13中的5个阵列排布的导光板，图2中仅示出了各个导光板右侧设有4个第一固定支架或第二固定支架，以及若干光源。应理解，这只是一种示意，实际上可以根 据需要合理设计导光板、第一或第二固定支架与光源的数量，以及将光源和第二固定支架设在所述导光板阵列的左侧。并且图1和图2中仅标出了导光板131～133、光源171和172，以及第一固定支架161和第二固定支架162，以作示意性说明。
具体的，如图2和图3所示，导光板132的侧面1321、导光板133侧面1331和1332均为入光面，即入光面方向与导光板的厚度方向垂直。入光面的定义对于其他未标出的导光板也适用。
如图3所示，导光板132的入光面(即侧面1321)与导光板133的入光面(即侧面1331)之间设有第一发光组件(图未标)。所述第一发光组件包括电路板181、设于电路板181上的光源171以及第一固定支架161。第一固定支架161与相邻的导光板132和导光板133均固定相连，用于拼接导光板132和133，并将导光板132和133与电路板181固连为一体。
如图3所示，导光板133的右侧设有第二发光组件(图未标)。所述第二发光组件为导光板133提供入射光，即所述第二发光组件的整体出光方向朝导光板133的侧面1332。
优选的，所述第二发光组件与所述第一发光组件的部件组成及其中各对应部件的结构完全一致。例如，所述第二发光组件包括电路板182、设于电路板182上的光源172和第二固定支架162，其中电路板182与电路板181结构相同；光源172与光源171结构相同；第二固定支架162与第一固定支架161结构相同，第二固定支架162用于将导光板133与电路板182固连为一体。设置结构相同的所述第二发光组件与所述第一发光组件，便于简化产品设计。当然，在其他实施例中，所述第二发光组件可以与所述第一发光组件的结构形式不同。例如，所述第二发光组件可以不包括第二固定支架，所述第二发光组件中的光源可以与所述第一发光组件中的不同。
本实施例中，所述第二发光组件是单向出光。所述第二发光组件中光源172及与光源172同一列的光源均向左出光，其入射光线从导光板133的侧面1332进入导光板133。
本实施例的一种实施方式中，所述第一发光组件可以是单向出光。考虑到所述第二发光组件是向左出光，所述第一发光组件中的各个光源的出光方向均 一致，且均向左出光。并且，一个所述第一发光组件能为与其相邻的一个所述导光板一对一地提供入射光。例如，所述第一发光组件中的光源171及与光源171同一列的光源均向左出光，其入射光线从导光板132的侧面1321进入导光板132。此方式中，每个导光板及其右侧的光源形成一个光线侧入的导光单元，各个所述导光单元共同作用产生背光。
本实施例的另一种实施方式中，所述第一发光组件可以是双向出光。所述第一发光组件中多个光源的出光方向交叉设置，即所述第一发光组件中的部分光源朝左出光，另一部分光源朝右出光，以使所述第一发光组件能为其两侧的两个相邻所述导光板提供入射光。例如，所述第一发光组件中的光源171朝左出光，其入射光线从导光板132的侧面1321射入导光板132；与光源171同一列的部分其他光源则朝右出光，其入射光线从导光板133的侧面1331射入导光板133。进一步的，同一列光源中，朝左出光的光源与朝右出光的光源交替间隔设置，以此为相邻两个所述导光板提供均匀的入射光。
本实施例中，导光板阵列13中各个导光板一侧的光源可分别单独控制，每一列光源的亮度可以精细化调节，从而可以对整个屏幕进行局部亮度调整，实现多分区功能设计和动态智能背光。使用本背光模组10的液晶显示器，其具有高对比度的图像显示效果，产品档次得到提升。由于导光板是侧面入光，光源设于导光板的侧面，不会占用导光板上方的结构空间，因此可以做到背光模组与液晶显示器的薄型化，提升产品外观品质。
如图2和图3所示，本实施例中，两个相邻所述导光板之间的电路板同时位于此两个导光板之下。例如，电路板181同时位于导光板132、133之下。导光板133右侧的电路板182则只在导光板133之下。
如图1所示，进一步的，每个所述导光板与背板15之间设有反射片。例如，导光板131～133与背板15之间分别设有反射片141～143。具体的，所述反射片位于所述电路板之上、所述导光板之下。所述反射片的作用是把从所述导光板中逃逸出的光线反射回去，提高光的利用率。
优选的，光源为LED(发光二级管)，其性能稳定、响应时间短、性价比高。当然，在其他实施例中，可以使用其他电致发光的器件，例如CCFL(冷阴极荧光灯管)。
本实施例中，所述第一固定支架与所述第二固定支架用于拼接、固定导光板，保证导光板阵列13结构稳固，确保稳定出光。由于所述第一固定支架用于固定双侧的导光板，而所述第二固定支架仅固定一侧的导光板，因此所述第一固定支架与所述第二固定支架的结构可以不同。当然，出于结构设计与生产制造的简便，可以将所述第一固定支架与所述第二固定支架设置为相同的结构。
优选的，所述第一固定支架与所述第二固定支架的结构一致。以下实施例将以第一固定支架161为例，详细描述固定支架的优选结构。
如图4所示，第一固定支架161包括顶板1611，及凸设在顶板1611上的侧板1612、1613。其中，侧板1612、1613向下延伸，侧板1612、1613背离顶板1611的一端与电路板181连接。例如，侧板1612、1613可以通过螺丝锁附或者胶体粘接固定在电路板181上。
如图3和图5所示，顶板1611具有第一表面A，第一表面A与导光板132贴合。侧板1612、1613分别具有与导光板132的侧面1332相对的第二表面B2、B1。其中，第二表面B2、B1均内缩在顶板1611的边缘之内，即均在第一表面A的边线之内，第一表面A与第二表面B2、B1均呈夹角相连，形成两个第一卡扣部，两个第一卡扣部均与导光板132卡持。
在其他实施例中，第一固定支架可以是仅设有一个所述侧板；或者，侧板的形状不限于为图3-图7中所示，只要是能与顶板形成第一卡扣部即可。
进一步的，如图3、图5和图6所示，顶板1611上设有弹性臂1611a，弹性臂1611a呈弯曲状，便于提供弹力，其远离顶板1611的一端设有第二卡扣部1611d。第二卡扣部1611d与所述第一卡扣部分别位于顶板1611的相对两侧，第二卡扣部1611d与导光板133相卡持。即位于两个相邻导光板132、133之间的第一固定支架161，通过其两端的所述第一卡扣部与第二卡扣部1611d，分别与导光板132和133相卡持。在其他实施例中，所述弹性臂可以根据需要设计形状，无需设置成弯曲状，只要具有弹力即可。
采用刚性的所述第一卡扣部，能够将导光板稳定固持；而设计弹性的第二卡扣部1611d，则能够在导光板膨胀或收缩时提供弹性缓冲，以对导光板进行弹性卡持。在其他实施例中，所述第一固定支架两端均可以为刚性卡扣、均可以为弹性卡扣，或一端为刚性卡扣另一端为弹性卡扣。
如图4所示，第一固定支架161下方设置有光源171，为了避免阻挡光源171出光，第一固定支架161上的相应位置要做结构避空。另外，第一固定支架161可以采用透明材料制成，以避免阻挡光线。
进一步的，如图1和图6所示，顶板1611上设有支撑部1611b与1611c，支撑部1611b、1611c与侧板1612分别位于顶板1611的相对两面。支撑部1611b、1611c上依次支撑有扩散板12和光学膜片11。本实施例中，图6所示的支撑部1611b、1611c的形状，仅仅是一种示意，实际上本申请的方案并不限于此。可以根据需要合理设计支撑部的形状、数量及分布位置。
支撑部1611b、1611c具有一定高度，其可以为扩散板12提供足够的混光高度。由于背光模组10采用了光线侧入的导光结构，因此本背光模组10的混光高度要低于常规直下式背光模组的混光高度。从而本实施例的背光模组10也比常规的直下式背光模组更薄。
上文详细描述了第一固定支架161的结构。第二固定支架162与第一固定支架161结构相同，但安装位置不同。本实施例中，由于第二固定支架162仅需要与一个导光板133固持，因此在组装时，将第二固定支架162的所述第一卡扣部与导光板133卡持以稳固地固持导光板133，而将第二固定支架162的所述第二卡扣部空置。
在其他实施例中，所述第二固定支架与所述第一固定支架的结构可以不同。所述第二固定支架可以仅设所述第一卡扣部，而不设所述第二卡扣部。设计两种不同的固定支架，以对不同位置的导光板有区别地进行固持；或者，所述第二固定支架、所述第一固定支架与导光板相固持的位置的结构，不限于为本实施例中所述的卡扣形式，而是可以根据需要予以设置；或者，所述第二固定支架可以省去，此时仅设有所述第一固定支架。
如图7所示，在本申请第二实施例中，与上述实施例不同的是，背光模组20的导光板阵列的两个外侧均设有所述第二发光组件。例如，导光板231的左侧设有一个所述第二发光组件，所述第二发光组件朝右出光，入射光线射入导光板231左侧的入光面。所述第二发光组件包括第二固定支架261；导光板231的右侧也设有一个所述第二发光组件，所述第二发光组件包括第二固定支架262。通过在每个导光板的两侧都设置光源，能够增加入射光量，提升各个导 光板入光量的均匀性；而在每个导光板的两侧都分布固定支架，能进一步保证所述导光板阵列的拼接结构稳固，进一步确保稳定出光。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易的想到各种等效的修改或替换，这些修改或替换都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以权利要求的保护范围为准。

Claims (16)

  1. 一种背光模组，其中，
    包括背板和平铺于所述背板上的导光板阵列；所述导光板阵列包括至少两个并排设置的导光板，每个所述导光板的两个相对侧面均为入光面，每两个相邻所述导光板的所述入光面之间均设有第一发光组件；所述第一发光组件包括电路板及设于所述电路板上的光源与第一固定支架，所述第一固定支架与其两侧的两个相邻所述导光板均固定连接；所述导光板阵列的外侧设有第二发光组件，所述第二发光组件为所述导光板阵列中最外侧的所述导光板提供入射光。
  2. 根据权利要求1所述的背光模组，其中，
    所述第一发光组件中的多个所述光源的出光方向均一致，且一个所述第一发光组件为与其相邻的一个所述导光板一对一地提供入射光。
  3. 根据权利要求1所述的背光模组，其中，
    所述第一发光组件中的多个所述光源的出光方向交叉设置，以使所述第一发光组件为其两侧的两个相邻所述导光板提供入射光。
  4. 根据权利要求1所述的背光模组，其中，
    所述第二发光组件包括电路板及设于所述电路板上的光源与第二固定支架，所述第二固定支架与所述导光板阵列中最外侧的所述导光板固定连接。
  5. 根据权利要求2所述的背光模组，其中，
    所述第二发光组件包括电路板及设于所述电路板上的光源与第二固定支架，所述第二固定支架与所述导光板阵列中最外侧的所述导光板固定连接。
  6. 根据权利要求3所述的背光模组，其中，
    所述第二发光组件包括电路板及设于所述电路板上的光源与第二固定支架，所述第二固定支架与所述导光板阵列中最外侧的所述导光板固定连接。
  7. 根据权利要求4所述的背光模组，其中，
    所述第一固定支架与所述第二固定支架均包括顶板及凸设在所述顶板上的侧板；所述第一顶板具有第一表面，所述第一固定支架中的第一表面与两个相邻所述导光板中的一个贴合，所述第二固定支架中的第一表面与所述导光板阵列中最外侧的所述导光板贴合；所述侧板上远离所述顶板的一端与所述电路 板相连，所述第一侧板具有第二表面，所述第二表面内缩在所述第一表面的边线之内；所述第一表面与所述第二表面呈夹角相连以形成第一卡扣部；所述第一固定支架中的第一卡扣部与两个相邻所述导光板中的一个卡持，所述第二固定支架中的第一卡扣部与所述导光板阵列中最外侧的所述导光板卡持。
  8. 根据权利要求5所述的背光模组，其中，
    所述第一固定支架与所述第二固定支架均包括顶板及凸设在所述顶板上的侧板；所述第一顶板具有第一表面，所述第一固定支架中的第一表面与两个相邻所述导光板中的一个贴合，所述第二固定支架中的第一表面与所述导光板阵列中最外侧的所述导光板贴合；所述侧板上远离所述顶板的一端与所述电路板相连，所述第一侧板具有第二表面，所述第二表面内缩在所述第一表面的边线之内；所述第一表面与所述第二表面呈夹角相连以形成第一卡扣部；所述第一固定支架中的第一卡扣部与两个相邻所述导光板中的一个卡持，所述第二固定支架中的第一卡扣部与所述导光板阵列中最外侧的所述导光板卡持。
  9. 根据权利要求6所述的背光模组，其中，
    所述第一固定支架与所述第二固定支架均包括顶板及凸设在所述顶板上的侧板；所述第一顶板具有第一表面，所述第一固定支架中的第一表面与两个相邻所述导光板中的一个贴合，所述第二固定支架中的第一表面与所述导光板阵列中最外侧的所述导光板贴合；所述侧板上远离所述顶板的一端与所述电路板相连，所述第一侧板具有第二表面，所述第二表面内缩在所述第一表面的边线之内；所述第一表面与所述第二表面呈夹角相连以形成第一卡扣部；所述第一固定支架中的第一卡扣部与两个相邻所述导光板中的一个卡持，所述第二固定支架中的第一卡扣部与所述导光板阵列中最外侧的所述导光板卡持。
  10. 根据权利要求7所述的背光模组，其中，
    所述顶板上设有弹性臂，所述弹性臂远离所述顶板的一端设有第二卡扣部，所述第二卡扣部与所述第一卡扣部分别位于所述顶板的相对两侧，所述第一固定支架中的所述第二卡扣部与两个相邻所述导光板中的另一个卡持。
  11. 根据权利要求8所述的背光模组，其中，
    所述顶板上设有弹性臂，所述弹性臂远离所述顶板的一端设有第二卡扣部，所述第二卡扣部与所述第一卡扣部分别位于所述顶板的相对两侧，所述第一固 定支架中的所述第二卡扣部与两个相邻所述导光板中的另一个卡持。
  12. 根据权利要求9所述的背光模组，其中，
    所述顶板上设有弹性臂，所述弹性臂远离所述顶板的一端设有第二卡扣部，所述第二卡扣部与所述第一卡扣部分别位于所述顶板的相对两侧，所述第一固定支架中的所述第二卡扣部与两个相邻所述导光板中的另一个卡持。
  13. 根据权利要求4所述的背光模组，其中，所述第一固定支架与所述第二固定支架由透明材料制成。
  14. 根据权利要求7所述的背光模组，其中，
    所述顶板上设有支撑部，所述支撑部与所述侧板分别位于所述顶板的相对两面；所述支撑部上依次支撑有扩散板和光学膜片。
  15. 根据权利要求14所述的背光模组，其中，每个所述导光板与所述背板之间设有反射片。
  16. 一种液晶显示器，其中，包括权利要求1所述的背光模组。
PCT/CN2017/071158 2016-12-30 2017-01-13 背光模组和液晶显示器 Ceased WO2018120305A1 (zh)

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