WO2019000561A1 - 液晶显示器及其背光模组 - Google Patents

液晶显示器及其背光模组 Download PDF

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Publication number
WO2019000561A1
WO2019000561A1 PCT/CN2017/095886 CN2017095886W WO2019000561A1 WO 2019000561 A1 WO2019000561 A1 WO 2019000561A1 CN 2017095886 W CN2017095886 W CN 2017095886W WO 2019000561 A1 WO2019000561 A1 WO 2019000561A1
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WO
WIPO (PCT)
Prior art keywords
light guiding
light
backlight module
guiding portion
disposed
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PCT/CN2017/095886
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English (en)
French (fr)
Inventor
陈倩
刘中杰
韩梅
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武汉华星光电技术有限公司
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Application filed by 武汉华星光电技术有限公司 filed Critical 武汉华星光电技术有限公司
Priority to US15/572,542 priority Critical patent/US10634838B2/en
Publication of WO2019000561A1 publication Critical patent/WO2019000561A1/zh

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    • 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
    • G02F1/133608—Direct backlight including particular frames or supporting means
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses

Definitions

  • the present invention relates to the field of liquid crystal display technologies, and in particular, to a liquid crystal display and a backlight module thereof.
  • the liquid crystal display has the advantages of thin body, low power consumption, no radiation, and the like, and has been widely used.
  • Liquid crystal displays are passive light-emitting displays that require a backlight module to provide a light source.
  • the existing backlight module usually includes a plastic frame, and the plastic frame is used to support the display module and the fixed backlight module.
  • setting the plastic frame on the one hand increases the manufacturing cost and weight of the liquid crystal display, and on the other hand increases the assembly time of the backlight module.
  • the present invention provides a liquid crystal display and a backlight module thereof, which can reduce the weight of the backlight module, reduce the cost, and shorten the assembly time of the backlight module.
  • the specific technical solution provided by the present invention is to provide a backlight module, the backlight module includes a reflective sheet, a light guide plate disposed on the reflective sheet, an optical film set, and a light source assembly, and the light guide plate includes a light guide. And a support portion disposed around the light guiding portion, the optical film group is located at a top of the light guiding portion; the light source assembly includes a plurality of LEDs, and the plurality of LEDs are disposed at the supporting portion and the The light guiding portions are disposed opposite to the light incident surface of the light guiding portion.
  • a plurality of baffles are disposed on the light incident surface of the light guiding portion, and the plurality of baffles are enclosed with the supporting portion to form a plurality of placement slots, and the plurality of LEDs are received in the Multiple placement slots.
  • the light source assembly further includes a substrate disposed on a top of the plurality of LEDs, the substrate completely covering the plurality of placement slots.
  • the substrate extends to the top of the support and conforms to the top of the support.
  • the substrate extends to the top of the light guiding portion and is in contact with the top of the light guiding portion.
  • a plurality of protrusions are disposed on a surface of the light guiding portion that is in contact with the supporting portion, and the supporting portion is provided with a plurality of grooves corresponding to the plurality of protrusions.
  • the support portion is made of a material that is opaque.
  • the support portion is integrally formed with the light guiding portion.
  • the present invention also provides a liquid crystal display comprising a display module and a backlight module as described above, the display module being disposed on the backlight module.
  • the backlight module of the present invention includes a reflective sheet, a light guide plate disposed on the reflective sheet, an optical film set, and a light source assembly, the light guide plate includes a light guiding portion and a support portion disposed around the light guiding portion.
  • the support portion is used for supporting the display module and the fixed backlight module, thereby eliminating the plastic frame, reducing the weight of the backlight module, reducing the cost of the backlight module, and shortening the assembly time of the backlight module.
  • FIG. 1 is a schematic structural view of a liquid crystal display
  • FIG. 2 is a schematic structural view of a light guide plate.
  • the liquid crystal display provided by the embodiment includes a display module 1 and a backlight module 2 .
  • the display module 1 is disposed on the backlight module 2
  • the backlight module 2 is configured to provide a light source for the display module 1 .
  • the backlight module 2 includes a reflective sheet 21, a light guide plate 22 disposed on the reflective sheet 21, an optical film group 23, and a light source. Component 24.
  • the light guide plate 22 is located at the top of the reflective sheet 21 and includes a light guiding portion 220 and a supporting portion 221 disposed around the light guiding portion 220.
  • the optical film group 23 is located at the top of the light guiding portion 220.
  • the light source assembly 24 includes a plurality of LEDs 240 disposed between the support portion 221 and the light guiding portion 220 and disposed opposite to the light incident surface of the light guiding portion 220.
  • the backlight module 2 in this embodiment is a side-lit backlight module.
  • the side surface of the light guiding portion 220 is a light incident surface, and the light emitted by the LED 240 enters the light guiding portion 220 from the light incident surface and is inside the light guiding portion 220. After multiple reflections, it is emitted from the top of the light guiding portion 220, passes through the optical film group 23, and enters the display module 1.
  • the reflective sheet 21 is used to reflect the light incident on the bottom of the light guiding portion 220 to prevent reflection. Light is emitted from the bottom of the light guiding portion 220.
  • the support portion 221 is a frame-like structure which is disposed on the reflection sheet 21 and surrounds the edge of the reflection sheet 21, and the support portion 221 and the reflection sheet 21 are bonded by a double-sided tape.
  • the plurality of LEDs 240 and the light guiding portion 220 are both located in a frame-like structure formed by the support portion 221.
  • the support portion 221 is made of a material that is opaque, and the support portion 221 and the light guide portion 220 are integrally formed and form an opaque support portion 221 and a light-transmitting light guide portion 220 by a two-color injection molding process.
  • the support portion 221 in this embodiment can function to support the display module 1 on the one hand, and can prevent light leakage at the edge of the backlight module 2 on the other hand.
  • the surface of the light guiding portion 220 that is in contact with the supporting portion 221 is provided with a plurality of protrusions 100.
  • the supporting portion 221 is provided with a plurality of grooves 101 corresponding to the plurality of protrusions 100.
  • the shape of the protrusions 100 may be prisms. Shape or semi-cylindrical shape, the shape of the groove 101 matches the shape of the protrusion 100 so that the light guiding portion 220 and the supporting portion 221 are in seamless contact, thereby avoiding the opaque supporting portion 221 and transmitting light.
  • the light guiding portions 220 are combined to cause a defect in the bright line.
  • a plurality of baffles 223 are disposed on the light incident surface of the light guiding portion 220, and the plurality of baffles 223 and the supporting portion 221 are enclosed to form a plurality of placing grooves 102.
  • the plurality of LEDs 240 are received in the plurality of placing grooves 102.
  • the placement slot 102 has a one-to-one correspondence with the LEDs 240.
  • the plurality of baffles 223 are equally spaced apart from the light incident surface of the light guiding portion 220.
  • the light source assembly in this embodiment further includes a substrate 241 disposed on the top of the plurality of LEDs 240.
  • the substrate 241 completely covers the plurality of placement slots 102, the substrate 241, the reflection sheet 21, the support portion 221, the light guide portion 220, and the shutter 223.
  • a closed space is formed, and the LEDs 240 are located in the enclosed space, so that the light emitted from the LEDs 240 can be prevented from leaking out of the placement slots 102.
  • the substrate 241 is a flexible circuit board (FPC).
  • one end of the substrate 241 extends to the top of the support portion 221, and a top portion of the support portion 221 is provided with a step including a first stepped surface 103 and a second stepped surface 104, one end of the substrate 241 resting on the first stepped surface
  • the upper surface 103 is bonded to the first step 103 by a light-shielding glue.
  • the distance from the upper surface of the substrate 241 to the first stepped surface 103 is smaller than the distance between the first stepped surface 103 and the second stepped surface 104.
  • the other end of the substrate 241 also extends to the top of the light guiding portion 220 and is in contact with the top of the light guiding portion 220.
  • the display module 1 in this embodiment includes an upper polarizer 11 , a lower polarizer 12 , and a display assembly 13 disposed between the upper polarizer 11 and the lower polarizer 12 .
  • the lower polarizer 12 is located above the optical film group 23.
  • the liquid crystal display of the embodiment further includes a light shielding layer 3 disposed between the display module 1 and the backlight module 2, and one end of the light shielding layer 3 is adhered to the second step surface 104, and the other end of the light shielding layer 3 is Bonding to the upper surface of the optical film group 23 can further prevent the backlight module 2 from leaking light through the light shielding layer 3.
  • the liquid crystal display further includes a glue layer 4 disposed between the light shielding layer 3 and the display assembly 13.
  • the light guide plate 22 of the embodiment includes a light guiding portion 220 and a supporting portion 221 disposed around the light guiding portion 220.
  • the display module 1 and the fixed backlight module 2 are supported by the supporting portion 221, thereby eliminating the plastic frame and reducing the
  • the weight of the backlight module 2 reduces the cost of the backlight module 2 and shortens the assembly time of the backlight module 2.

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

Abstract

一种液晶显示器及其背光模组（2），该背光模组（2）包括反射片（21）、设于该反射片（21）上的导光板（22）、光学膜片组（23）及光源组件（24），该导光板（22）包括导光部（220）及环绕该导光部（220）设置的支撑部（221），该光学膜片组（23）位于该导光部（220）的顶部；该光源组件（24）包括多个LED（240），该多个LED（240）设于该支撑部（221）与该导光部（220）之间并与该导光部（220）的入光面相对设置。该导光板（22）包括导光部(220)及环绕该导光部（220）设置的支撑部（221），该支撑部（221）用于支撑显示模组（1）以及固定背光模组（2），从而省去胶框，减轻了背光模组（2）的重量、降低了背光模组（2）的成本、缩短了背光模组（2）的组装时间。

Description

液晶显示器及其背光模组 技术领域
本发明涉及液晶显示技术领域，尤其涉及一种液晶显示器及其背光模组。
背景技术
液晶显示器具有机身薄、功耗低、无辐射等优点，得到了越来越广泛的应用。液晶显示器属于被动式发光显示器，需要背光模组来为其提供光源。现有的背光模组中通常包含胶框，胶框用于支撑显示模组以及固定背光模组。但是，设置胶框一方面增加了液晶显示器的制造成本和重量，另一方面增加了背光模组的组装时间。
发明内容
为了解决上述问题，本发明提出一种液晶显示器及其背光模组，能够减轻背光模组的重量、降低成本、缩短背光模组的组装时间。
本发明提出的具体技术方案为：提供一种背光模组，所述背光模组包括反射片、设于所述反射片上的导光板、光学膜片组及光源组件，所述导光板包括导光部及环绕所述导光部设置的支撑部，所述光学膜片组位于所述导光部的顶部；所述光源组件包括多个LED，所述多个LED设于所述支撑部与所述导光部之间并与所述导光部的入光面相对设置。
可选地，所述导光部的入光面上间隔设置有多个挡板，所述多个挡板与所述支撑部围合形成多个放置槽，所述多个LED收容于所述多个放置槽中。
可选地，所述光源组件还包括设于所述多个LED顶部的基板，所述基板完全覆盖所述多个放置槽。
可选地，所述基板延伸至所述支撑部的顶部并与所述支撑部的顶部贴合。
可选地，所述基板延伸至所述导光部的顶部并与所述导光部的顶部贴合。
可选地，所述导光部与所述支撑部接触的面上设置有多个凸起，所述支撑部上设有与所述多个凸起一一对应的多个凹槽。
可选地，所述支撑部是由不透光的材质制成。
可选地，所述支撑部与所述导光部一体成型。
本发明还提供了一种液晶显示器，所述液晶显示器包括显示模组及如上所述的背光模组，所述显示模组设于所述背光模组上。
本发明提供的背光模组包括反射片、设于所述反射片上的导光板、光学膜片组及光源组件，所述导光板包括导光部及环绕所述导光部设置的支撑部，所述支撑部用于支撑显示模组以及固定背光模组，从而省去胶框，减轻了背光模组的重量、降低了背光模组的成本、缩短了背光模组的组装时间。
附图说明
图1为液晶显示器的结构示意图；
图2为导光板的结构示意图。
具体实施方式
以下，将参照附图来详细描述本发明的实施例。然而，可以以许多不同的形式来实施本发明，并且本发明不应该被解释为局限于这里阐述的具体实施例。相反，提供这些实施例是为了解释本发明的原理及其实际应用，从而使本领域的其他技术人员能够理解本发明的各种实施例和适合于特定预期应用的各种修改。
参照图1、图2，本实施例提供的液晶显示器包括显示模组1和背光模组2，显示模组1设置于背光模组2上，背光模组2用于为显示模组1提供光源。背光模组2包括反射片21、设于反射片21上的导光板22、光学膜片组23及光源 组件24。导光板22位于反射片21的顶部，其包括导光部220及环绕导光部220设置的支撑部221，光学膜片组23位于导光部220的顶部。光源组件24包括多个LED 240，多个LED 240设于支撑部221与导光部220之间并与导光部220的入光面相对设置。
本实施例中的背光模组2为侧入式背光模组，导光部220的侧面为入光面，LED 240发射的光线从入光面进入导光部220中并在导光部220内经过多次反射后从导光部220的顶部出射，经过光学膜片组23后进入显示模组1中，其中，反射片21用于将入射到导光部220的底部的光线进行反射，防止光线从导光部220的底部出射。
支撑部221为框状结构，其位于反射片21上并环绕反射片21的边缘设置，支撑部221与反射片21之间通过双面胶进行粘合。多个LED 240和导光部220均位于支撑部221形成的框状结构内。其中，支撑部221是由不透光的材料制成，支撑部221和导光部220一体成型并通过双色注塑工艺形成不透光的支撑部221和透光的导光部220。本实施例中的支撑部221一方面可以起到支撑显示模组1的作用，另一方面可以防止背光模组2的边缘漏光。
导光部220与支撑部221接触的面上设置有多个凸起100，支撑部221上设有与多个凸起100一一对应的多个凹槽101，凸起100的形状可以为棱柱形或者半圆柱形，凹槽101的形状与凸起100的形状相匹配，以使得都导光部220与支撑部221之间无缝接触，从而避免了不透光的支撑部221与透光的导光部220结合而导致亮线不良的情况。
导光部220的入光面上间隔设置有多个挡板223，多个挡板223与支撑部221围合形成多个放置槽102，其中，多个LED 240收容于多个放置槽102中，放置槽102与LED 240一一对应。优选的，多个挡板223等间隔设置于导光部220的入光面上。
本实施例中的光源组件还包括设于多个LED 240顶部的基板241，基板241完全覆盖多个放置槽102，基板241、反射片21、支撑部221、导光部220和挡板223围合成一个封闭的空间，LED 240位于该封闭的空间内，从而可以防止LED 240发出的光线从放置槽102中泄露出去。其中，基板241为柔性电路板(FPC)。
为了增加散热效果，基板241的一端延伸至支撑部221的顶部，支撑部221的顶部设置有一台阶，其包括第一台阶面103和第二台阶面104，基板241的一端搁置于第一台阶面103上并通过遮光胶与第一台阶面103进行粘合。基板241的上表面到第一台阶面103的距离小于第一台阶面103和第二台阶面104之间的距离。此外，基板241的另一端还延伸至导光部220的顶部并与导光部220的顶部贴合。
本实施例中的显示模组1包括上偏光片11、下偏光片12及设置于上偏光片11与下偏光片12之间的显示组件13。下偏光片12位于光学膜片组23的上方。本实施例中的液晶显示器还包括设于显示模组1与背光模组2之间的遮光胶层3，遮光胶层3的一端与第二台阶面104贴合，遮光胶层3的另一端与光学膜片组23的上表面贴合，通过遮光胶层3可以进一步的防止背光模组2漏光。液晶显示器还包括设于遮光胶层3与显示组件13之间的胶层4。
本实施例中的导光板22包括导光部220及环绕导光部220设置的支撑部221，通过支撑部221支撑显示模组1以及固定背光模组2，从而省去了胶框，减轻了背光模组2的重量、降低了背光模组2的成本、缩短了背光模组2的组装时间。
以上所述仅是本申请的具体实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本申请原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本申请的保护范围。

Claims (16)

  1. 一种背光模组，其中，包括反射片、设于所述反射片上的导光板、光学膜片组及光源组件，所述导光板包括导光部及环绕所述导光部设置的支撑部，所述光学膜片组位于所述导光部的顶部；所述光源组件包括多个LED，所述多个LED设于所述支撑部与所述导光部之间并与所述导光部的入光面相对设置。
  2. 根据权利要求1所述的背光模组，其中，所述导光部的入光面上间隔设置有多个挡板，所述多个挡板与所述支撑部围合形成多个放置槽，所述多个LED收容于所述多个放置槽中。
  3. 根据权利要求2所述的背光模组，其中，所述光源组件还包括设于所述多个LED顶部的基板，所述基板完全覆盖所述多个放置槽。
  4. 根据权利要求3所述的背光模组，其中，所述基板延伸至所述支撑部的顶部并与所述支撑部的顶部贴合。
  5. 根据权利要求4所述的背光模组，其中，所述基板延伸至所述导光部的顶部并与所述导光部的顶部贴合。
  6. 根据权利要求1所述的背光模组，其中，所述导光部与所述支撑部接触的面上设置有多个凸起，所述支撑部上设有与所述多个凸起一一对应的多个凹槽。
  7. 根据权利要求1所述的背光模组，其中，所述支撑部是由不透光的材质制成。
  8. 根据权利要求7所述的背光模组，其中，所述支撑部与所述导光部一体成型。
  9. 一种液晶显示器，其中，包括显示模组及背光模组，所述背光模组包括反射片、设于所述反射片上的导光板、光学膜片组及光源组件，所述导光板包括导光部及环绕所述导光部设置的支撑部，所述光学膜片组位于所述导光部的顶部；所述光源组件包括多个LED，所述多个LED设于所述支撑部与所述导 光部之间并与所述导光部的入光面相对设置，所述显示模组设于所述背光模组上。
  10. 根据权利要求9所述的液晶显示器，其中，所述导光部的入光面上间隔设置有多个挡板，所述多个挡板与所述支撑部围合形成多个放置槽，所述多个LED收容于所述多个放置槽中。
  11. 根据权利要求10所述的液晶显示器，其中，所述光源组件还包括设于所述多个LED顶部的基板，所述基板完全覆盖所述多个放置槽。
  12. 根据权利要求11所述的液晶显示器，其中，所述基板延伸至所述支撑部的顶部并与所述支撑部的顶部贴合。
  13. 根据权利要求12所述的液晶显示器，其中，所述基板延伸至所述导光部的顶部并与所述导光部的顶部贴合。
  14. 根据权利要求9所述的液晶显示器，其中，所述导光部与所述支撑部接触的面上设置有多个凸起，所述支撑部上设有与所述多个凸起一一对应的多个凹槽。
  15. 根据权利要求9所述的液晶显示器，其中，所述支撑部是由不透光的材质制成。
  16. 根据权利要求15所述的液晶显示器，其中，所述支撑部与所述导光部一体成型。
PCT/CN2017/095886 2017-06-30 2017-08-03 液晶显示器及其背光模组 WO2019000561A1 (zh)

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