WO2016150009A1 - 背光模块及具有该背光模块的液晶显示器 - Google Patents

背光模块及具有该背光模块的液晶显示器 Download PDF

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Publication number
WO2016150009A1
WO2016150009A1 PCT/CN2015/080684 CN2015080684W WO2016150009A1 WO 2016150009 A1 WO2016150009 A1 WO 2016150009A1 CN 2015080684 W CN2015080684 W CN 2015080684W WO 2016150009 A1 WO2016150009 A1 WO 2016150009A1
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Prior art keywords
backlight module
liquid crystal
crystal display
light source
bottom plate
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PCT/CN2015/080684
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English (en)
French (fr)
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樊勇
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深圳市华星光电技术有限公司
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Publication of WO2016150009A1 publication Critical patent/WO2016150009A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/10—Construction
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2101/00—Point-like light sources

Definitions

  • the present invention relates to the field of liquid crystal display technology, and in particular to a backlight module and a liquid crystal display having the same.
  • LCD liquid crystal display
  • the LCD mainly includes a liquid crystal display panel for displaying an image and a backlight module for providing a display light source to the liquid crystal display panel.
  • the light-emitting diode since the light-emitting diode (LED) has the advantages of small volume, fast response time, long life, non-breaking, high color gamut, and many types of packages, it has become the mainstream of the light source in the backlight module.
  • the LED backlight module it is mainly divided into a side-input LED backlight module and a direct-lit LED backlight module.
  • the side-lit LED backlight module has the advantages of low power consumption and thin thickness, but it requires heavy light guide plates and a large number of LEDs, resulting in heavy weight and high cost.
  • the direct-lit LED backlight module has a lower cost because it uses fewer LEDs and does not use a light guide plate; however, the LED used in the direct-lit LED backlight module has a secondary lens due to the cost of the LED with the secondary lens. Expensive, which leads to a significant increase in production costs.
  • a backlight module includes: a back frame including a bottom plate and side plates respectively located at two sides of the bottom plate; a plurality of light sources arranged in an array on the bottom plate; and a plurality of top reflective elements Each top reflective element is fixed on a corresponding light source; a transparent plate is disposed on the side plate Upper to enclose the light source and the top reflective element between the transparent plate and the back frame.
  • the cross-sectional shape of the top reflective element has a triangular shape.
  • the top reflective element includes a base body and a reflective element disposed on a surface of the base body.
  • the cross-sectional shape of the base body has a triangular shape.
  • top reflective element is inverted and fixed on the corresponding light source.
  • the side panel is a side panel having a reflective force.
  • the inner surface of the side panel is provided with a reflective element.
  • the surface of the transparent plate facing the bottom plate has a plurality of dots.
  • the light source is a light emitting diode.
  • a liquid crystal display including a liquid crystal display panel and a backlight module disposed oppositely, the backlight module providing a display light source to the liquid crystal display panel to cause the liquid crystal display panel to display an image
  • the backlight module is the backlight module described above.
  • the LED used in the backlight module of the present invention does not need to have a secondary lens, and the number is smaller, which saves production cost.
  • FIG. 1 shows a schematic structural view of a liquid crystal display according to an embodiment of the present invention
  • FIG. 2 is a schematic structural view of a backlight module according to an embodiment of the invention.
  • FIG. 3 is a schematic structural view of a backlight module according to another embodiment of the present invention.
  • FIG. 4 shows a schematic structural view of a backlight module according to still another embodiment of the present invention.
  • FIG. 1 shows a schematic structural view of a liquid crystal display according to an embodiment of the present invention.
  • a liquid crystal display according to an embodiment of the present invention includes a liquid crystal display panel 200 and a backlight module 100 disposed opposite to the liquid crystal display panel 200 , wherein the backlight module 100 provides a display light source to the liquid crystal display panel 200 to enable the liquid crystal display panel 200 displays the image.
  • the liquid crystal display panel 200 includes a Thin Film Transistor (TFT) array substrate 210, a color filter (CF) substrate 220 disposed on the TFT array substrate 210, and a clip.
  • the liquid crystal layer 230 between the TFT array substrate 210 and the CF substrate 220 includes a plurality of liquid crystal molecules in the liquid crystal layer 230.
  • TFT Thin Film Transistor
  • CF color filter
  • the specific structure of the liquid crystal display panel 200 of the present embodiment is substantially the same as that of the prior art liquid crystal display panel, those skilled in the art can refer to the specific structure of the liquid crystal display panel described in the related art. No longer described in detail.
  • FIG. 2 is a schematic structural view of a backlight module according to an embodiment of the invention.
  • a backlight module 100 includes a back frame 110, a plurality of light sources 120, a plurality of top reflective elements 130, a transparent plate 140, a brightness enhancement film 150, and a diffusion film 160.
  • the back frame 110 includes at least a bottom plate 112 and two side plates 114 extending from the edge of the bottom plate 112 to the same side, that is, the two side plates 114 are respectively located at two sides of the bottom plate 112. Further, the angle between each side plate 114 and the bottom plate 112 is an obtuse angle.
  • the side panel 114 itself has a reflective capability, the function of which will be described below.
  • the side plate 114 itself has no reflection capability, and a first reflecting member (for example, a reflective film) 170 is provided on the inner surface of the side plate 114 so that the side plate 114 is provided. Reflective ability.
  • a plurality of light source 120 arrays are arranged on the bottom plate 112 of the back frame 110.
  • the light source 120 is a light emitting diode (LED), but the invention is not limited thereto.
  • each top reflective element 130 is secured to its corresponding light source 120.
  • each of the top reflective elements 130 can be fixed to its corresponding light source 120 by any suitable type of fixing, which is not specifically limited herein.
  • the top reflective element 130 itself has a reflective capability as a whole.
  • the top reflective element 130 includes a base 132 and a second reflective element (eg, a reflective film) 134 disposed on an outer surface of the base 132, that is, the base 132.
  • the self-reflecting ability is such that the base 132 is provided with a reflective capability by providing a second reflective element 134 on the outer surface of the base 132.
  • the cross-sectional shape of the top reflective member 130 is triangular, but the present invention is not limited thereto. Further, each of the top reflective elements 130 having a triangular shape in cross-sectional shape is inverted and fixed on its corresponding light source 120.
  • the transparent plate 140 is disposed on the two side plates 114 of the back frame 110 to enclose the plurality of light sources 120 and the plurality of top reflective elements 130 between the transparent plate 140 and the back frame 110.
  • the transparent plate 140 may be a transparent glass substrate or a transparent plastic substrate.
  • a plurality of dots 144 are disposed on the surface 142 of the transparent plate 140 facing the bottom plate 112 of the back frame 110.
  • the brightness enhancement film 150 and the diffusion film 160 are sequentially disposed on the transparent plate 140. It should be noted that the backlight module 100 according to an embodiment of the present invention further includes other suitable types of components such as a plastic frame, a reflective sheet, and the like.
  • the light emitted by the light source 120 illuminates the corresponding top reflective element 130 thereon, the light is reflected onto a reflective sheet (not shown) disposed on the bottom plate 112 of the back frame 110, and then reflected by the reflective sheet to the surface 142.
  • a reflective sheet (not shown) disposed on the bottom plate 112 of the back frame 110
  • the dots 144 continue to propagate and diffuse the light; when the light reflected by the reflective sheet directly illuminates the transparent plate 140
  • Light can be directly transmitted from the transparent plate 140.
  • the brightness uniformity of the light emitted from the backlight module 100 can be achieved by changing the distribution of the dots 144.
  • the LED used in the backlight module of the embodiment of the present invention does not need to have a secondary lens, compared to the secondary lens-equipped LED used in the backlight module of the related art. Less quantity and saving production costs.

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

Abstract

一种背光模块(100)和具有该背光模块(100)的液晶显示器。背光模块(100)包括：背框(110)，包括底板(112)及分别位于底板(112)两侧的侧板(114)；若干光源(120)，阵列排布于底板(112)上；若干顶反射元件(130)，每个顶反射元件(130)固定于对应的光源(120)之上；透明板(140)，设置于侧板(114)之上，以将光源(120)和顶反射元件(130)封闭于透明板(140)与背框(110)之间。背光模块(100)中采用的LED无需带二次透镜，并且数量更少，节约生产成本。

Description

背光模块及具有该背光模块的液晶显示器 技术领域
本发明属于液晶显示技术领域，具体地讲，涉及一种背光模块及具有该背光模块的液晶显示器。
背景技术
随着信息社会的发展，人们对平板显示器的需求得到了快速的增长。液晶显示器(Liquid Crystal Display，简称LCD)具有体积小、功耗低、无辐射等特点，在当前的平板显示器市场占据了主导地位。LCD主要包括用于显示图像的液晶显示面板以及向液晶显示面板提供显示光源的背光模块。
在背光模块中，由于发光二极管(LED)具有体积小、响应时间快、寿命长、不易碎、色域高、封装体种类多等优点，目前已成为背光模块中光源的主流。
在LED背光模块中，目前主要分为侧入光式LED背光模块和直下式LED背光模块。侧入光式LED背光模块具有功耗小、厚度薄等优点，但由于其需要使用导光板以及较多数量的LED，从而导致重量重且成本较高。而直下式LED背光模块由于使用的LED数量较少，并且不使用导光板，所以其成本较低；但是直下式LED背光模块中使用的LED带有二次透镜，由于带二次透镜的LED造价昂贵，这会导致生产成本大幅增加。
发明内容
为了解决上述现有技术的问题，本发明的目的在于提供一种能够降低生产成本的背光模块及具有该背光模块的液晶显示器。
根据本发明的一方面，提供了一种背光模块，其包括：背框，包括底板及分别位于所述底板两侧的侧板；若干光源，阵列排布于所述底板上；若干顶反射元件，每个顶反射元件固定于对应的光源之上；透明板，设置于所述侧板之 上，以将所述光源和所述顶反射元件封闭于所述透明板与所述背框之间。
进一步地，所述顶反射元件的截面形状呈三角形形状。
进一步地，所述顶反射元件包括基体及设置于所述基体表面的反射元件。
进一步地，所述基体的截面形状呈三角形形状。
进一步地，所述顶反射元件倒置固定于对应的光源之上。
进一步地，所述侧板为具有反射力的侧板。
进一步地，所述侧板的内表面设置有反射元件。
进一步地，所述透明板的朝向所述底板的表面具有若干网点。
进一步地，所述光源为发光二极管。
根据本发明的另一方面，提供了一种液晶显示器，包括相对设置的液晶显示面板和背光模块，所述背光模块提供显示光源给所述液晶显示面板，以使所述液晶显示面板显示图像，其中，所述背光模块为上述的背光模块。
本发明的有益效果：相比较于现有技术的背光模块中采用的带二次透镜的LED，本发明的背光模块中采用的LED无需带二次透镜，并且数量更少，节约生产成本。
附图说明
通过结合附图进行的以下描述，本发明的实施例的上述和其它方面、特点和优点将变得更加清楚，附图中：
图1示出了根据本发明的实施例的液晶显示器的结构示意图；
图2示出了根据本发明的一实施例的背光模块的结构示意图；
图3示出了根据本发明的另一实施例的背光模块的结构示意图；
图4示出了根据本发明的又一实施例的背光模块的结构示意图。
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限制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。在附图中，为了清楚器件，夸大了层和区域的厚度，相同的标号在整个说明书和附图中可用来表示相同的元件。
图1示出了根据本发明的实施例的液晶显示器的结构示意图。
参照图1，根据本发明的实施例的液晶显示器包括液晶显示面板200及与液晶显示面板200相对设置的背光模块100，其中，背光模块100提供显示光源给液晶显示面板200，以使液晶显示面板200显示图像。
在本实施例中，液晶显示面板200包括薄膜晶体管(Thin Film Transistor，简称TFT)阵列基板210、与TFT阵列基板210对盒设置的彩色滤光片(Color Filter，简称CF)基板220以及夹设于TFT阵列基板210与CF基板220之间的液晶层230，其中，液晶层230中包括若干液晶分子。这里，由于本实施例的液晶显示面板200的具体结构与现有技术的液晶显示面板的结构大体相同，本领域的技术人员可参照相关的现有技术描述的液晶显示面板的具体结构，在此不再详细描述。
以下将主要针对背光模块100进行详细地描述。图2示出了根据本发明的一实施例的背光模块的结构示意图。
参照图2，根据本发明的一实施例的背光模块100包括：背框110、若干光源120、若干顶反射元件130、透明板140、增亮膜150以及扩散膜160。
背框110至少包括底板112以及两个从该底板112边缘向同一侧延伸的侧板114，也就是说，这两个侧板114分别位于该底板112的两侧。进一步地，每个侧板114与底板112的夹角为钝角。在本实施例中，优选地，侧板114自身具有反射能力，其作用将在下面描述。作为本发明的另一实施方式，如图3所示，侧板114自身无反射能力，通过在侧板114的内表面上设置第一反射元件(例如反射膜)170，以使侧板114具备反射能力。
若干光源120阵列排布在背框110的底板112上。在本实施例中，优选地，光源120为发光二极管(LED)，但本发明并不限制于此。
每个顶反射元件130固定于其对应的光源120之上。在本实施例中，每个顶反射元件130可通过任何合适类型的固定方式固定于其对应的光源120之上，这里并不做具体限定。所述顶反射元件130自身整体具有反射能力。作为本发明的另一实施方式，如图4所示，所述顶反射元件130包括基体132以及设置于基体132外表面上的第二反射元件(例如反射膜)134，也就是说，基体132自身无反射能力，通过在基体132的外表面上设置第二反射元件134，以使基体132具备反射能力。
此外，在本实施例中，优选地，所述顶反射元件130的截面形状呈三角形状，但本发明并不限制于此。进一步地，截面形状呈三角形状的每个顶反射元件130倒置固定于其对应的光源120之上。
透明板140设置于背框110的两个侧板114上，以将若干光源120和若干顶反射元件130封闭于透明板140和背框110之间。在本实施例中，透明板140可是透明的玻璃基板或者透明的塑料基板。进一步地，透明板140的朝向背框110的底板112的表面142上设置有若干网点144。
增亮膜150和扩散膜160依次设置于透明板140上。应当说明的是，根据本发明的一实施例的背光模块100还包括其他合适类型的元件，例如胶框、反射片等。
当光源120发出的光照射到其上对应的顶反射元件130时，光反射到设置在背框110的底板112上的反射片(未示出)上，而后经过反射片将光反射到表面142上具有若干网点144的透明板140上，当经过反射片反射的光照射到这些网点144上时，这些网点144继续将光进行传播扩散；当经过反射片反射的光直接照射到透明板140上时，光可以直接从透明板140透出。这里，可通过改变这些网点144的分布来实现背光模块100出射光的亮度均匀化。
综上所述，根据本发明的实施例，相比较于现有技术的背光模块中采用的带二次透镜的LED，本发明的实施例的背光模块中采用的LED无需带二次透镜，并且数量更少，节约生产成本。
虽然已经参照特定实施例示出并描述了本发明，但是本领域的技术人员将理解：在不脱离由权利要求及其等同物限定的本发明的精神和范围的情况下，可在此进行形式和细节上的各种变化。

Claims (18)

  1. 一种背光模块，其中，包括：
    背框，包括底板及分别位于所述底板两侧的侧板；
    若干光源，阵列排布于所述底板上；
    若干顶反射元件，每个顶反射元件固定于对应的光源之上；
    透明板，设置于所述侧板之上，以将所述光源和所述顶反射元件封闭于所述透明板与所述背框之间。
  2. 根据权利要求1所述的背光模块，其中，所述顶反射元件的截面形状呈三角形形状。
  3. 根据权利要求1所述的背光模块，其中，所述顶反射元件包括基体及设置于所述基体表面的第二反射元件。
  4. 根据权利要求3所述的背光模块，其中，所述基体的截面形状呈三角形形状。
  5. 根据权利要求1所述的背光模块，其中，所述顶反射元件倒置固定于对应的光源之上。
  6. 根据权利要求1所述的背光模块，其中，所述侧板为具有反射能力的侧板。
  7. 根据权利要求1所述的背光模块，其中，所述侧板的内表面设置有第一反射元件。
  8. 根据权利要求1所述的背光模块，其中，所述透明板的朝向所述底板的表面具有若干网点。
  9. 根据权利要求1所述的背光模块，其中，所述光源为发光二极管。
  10. 一种液晶显示器，包括相对设置的液晶显示面板和背光模块，所述背光模块提供显示光源给所述液晶显示面板，以使所述液晶显示面板显示图像，其中，所述背光模块包括：
    背框，包括底板及分别位于所述底板两侧的侧板；
    若干光源，阵列排布于所述底板上；
    若干顶反射元件，每个顶反射元件固定于对应的光源之上；
    透明板，设置于所述侧板之上，以将所述光源和所述顶反射元件封闭于所述透明板与所述背框之间。
  11. 根据权利要求10所述的液晶显示器，其中，所述顶反射元件的截面形状呈三角形形状。
  12. 根据权利要求10所述的液晶显示器，其中，所述顶反射元件包括基体及设置于所述基体表面的第二反射元件。
  13. 根据权利要求12所述的液晶显示器，其中，所述基体的截面形状呈三角形形状。
  14. 根据权利要求10所述的液晶显示器，其中，所述顶反射元件倒置固定于对应的光源之上。
  15. 根据权利要求10所述的液晶显示器，其中，所述侧板为具有反射能力的侧板。
  16. 根据权利要求10所述的液晶显示器，其中，所述侧板的内表面设置有第一反射元件。
  17. 根据权利要求10所述的液晶显示器，其中，所述透明板的朝向所述底板的表面具有若干网点。
  18. 根据权利要求10所述的液晶显示器，其中，所述光源为发光二极管。
PCT/CN2015/080684 2015-03-24 2015-06-03 背光模块及具有该背光模块的液晶显示器 WO2016150009A1 (zh)

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