WO2013143225A1 - 侧光式背光模组及其液晶显示器 - Google Patents

侧光式背光模组及其液晶显示器 Download PDF

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Publication number
WO2013143225A1
WO2013143225A1 PCT/CN2012/076131 CN2012076131W WO2013143225A1 WO 2013143225 A1 WO2013143225 A1 WO 2013143225A1 CN 2012076131 W CN2012076131 W CN 2012076131W WO 2013143225 A1 WO2013143225 A1 WO 2013143225A1
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WO
WIPO (PCT)
Prior art keywords
disposed
light emitting
light
reflective sheet
edge
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/CN2012/076131
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English (en)
French (fr)
Inventor
唐国富
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TCL China Star Optoelectronics Technology Co Ltd
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Shenzhen China Star Optoelectronics Technology Co Ltd
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Application filed by Shenzhen China Star Optoelectronics Technology Co Ltd filed Critical Shenzhen China Star Optoelectronics Technology Co Ltd
Priority to US13/574,081 priority Critical patent/US9019444B2/en
Publication of WO2013143225A1 publication Critical patent/WO2013143225A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • G02B6/0031—Reflecting element, sheet or layer
    • 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
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • 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
    • G02B6/0083—Details of electrical connections of light sources to drivers, circuit boards, or the like

Definitions

  • Edge-lit backlight module and liquid crystal display thereof are Edge-lit backlight module and liquid crystal display thereof
  • the present invention relates to an edge-lit backlight module and a liquid crystal display using the same, and more particularly to an edge-lit backlight module having a dark surface and using the same Liquid crystal display of the backlight module. Background technique
  • the backlight module can be said to be a key component of a liquid crystal display (LCD) panel, and its main function is to supply a light source with sufficient brightness and uniform distribution to make the LCD panel normal. Display images.
  • LCD panels have been widely used in many electronic products with growth potential, such as monitors, notebook computers, digital cameras, projectors, etc., the demand for backlight modules and related components continues to grow. .
  • the backlight module can be divided into a direct-type and an edge-type design, wherein the direct-type design is to set a backlight, such as a fluorescent tube, directly under the backlight module.
  • a backlight such as a fluorescent tube
  • Two or more lamps can be used to increase the intensity of the light source, so it is suitable for display panels of higher brightness or larger size, such as LCD monitors or LCD TVs.
  • the edge light type backlight module is disposed on the side of the display panel, the light of the light source generator is uniformly introduced into the display panel by using a light guide plate (LGP), thereby reducing the liquid crystal.
  • LGP light guide plate
  • FIG. 1 is a partial schematic view of a prior art edge-lit backlight module.
  • the prior art edge-lit backlight module 9 includes a printed circuit board 910, a light-emitting diode 920, a reflective sheet 940, a light guide plate 950, and a reflective surface 930.
  • the light emitting diode 920 is disposed on the left side of the printed circuit board 910 and the reflective sheet 940 is disposed on the right side of the printed circuit board 910.
  • the light guide plate 950 is disposed above the reflective sheet 940 such that the reflective sheet 940 is located between the light guide plate 950 and the printed circuit board 910.
  • the reflective surface 930 is disposed on one side of the light guide plate 950 and has a distance from the light emitting diode 920 for reflecting the light emitted by the light emitting diode 920.
  • the reflection sheet 940 has cutting tolerances, assembly tolerances, and assembly deviation of the LED 920, the length of the reflection sheet 940 is shorter than the length of the light guide plate 950.
  • FIG. 2 is a schematic diagram of a prior art edge-lit backlight module and a light path.
  • the light emitting diode 920 emits a light 960
  • the light 960 is reflected to the printed circuit board 910 via the reflective sheet 930, and the light 960 enters the light guide plate 950 via the reflection of the printed circuit board 910. Since the light 960 entering the light guide plate 950 does not satisfy the total reflection angle, the light 960 is immediately emitted from the exit surface of the light guide plate 950, causing a bright spot to be generated, which seriously affects the quality of the picture.
  • the object of the present invention is to overcome the defects of the existing edge-lit backlight module and provide a novel structure of the edge-lit backlight module, and a technical problem to be solved is that it can be solved because the total reflection is not satisfied.
  • the light of the corner enters the light guide plate, thus causing the occurrence of bright spots, which seriously affects the quality of the picture.
  • Another object of the present invention is to overcome the shortcomings of the prior art liquid crystal display and to provide a liquid crystal display using a novel structure of an edge-lit backlight module, and a technical problem to be solved is that it can be solved because it is not satisfied.
  • the light of the reflection angle enters the light guide plate, thus causing the occurrence of bright spots, which seriously affects the quality of the picture.
  • the edge-lit backlight module of the present invention comprises: a printed circuit board comprising a bearing surface; a plurality of light emitting diodes are disposed on the left side of the bearing surface, each The light emitting diode comprises an exit surface, the light emitted by the light emitting diode is emitted from the exit surface; a reflective sheet is disposed on the right side of the carrying surface; a light guide plate is disposed above the reflective sheet, so that the reflective sheet is located thereon a light guide plate and the bearing surface; a reflective surface disposed on one side of the light guide plate and having a distance from the light emitting diode, the reflective surface for reflecting the light emitted by the exit surface; and an absorption surface disposed at The bearing surface is located on one side of the LED to absorb the light reflected by the reflecting surface.
  • the absorption surface is disposed on the bearing surface and between each two adjacent light-emitting diodes.
  • the material of the absorption surface is black pigment.
  • the material of the absorbing surface is a gel or a soft object tape, wherein the gel and the soft object tape are black or gray in color.
  • the absorption surface is disposed on the bearing surface and between the light-emitting diode and the reflective sheet, and the material of the dark surface is gray heat-dissipating tape, and the thickness of the heat-dissipating tape is equal to or greater than this.
  • a reflective sheet is disposed on the bearing surface and between the light-emitting diode and the reflective sheet, and the material of the dark surface is gray heat-dissipating tape, and the thickness of the heat-dissipating tape is equal to or greater than this.
  • the aforementioned edge-lit backlight module further includes a lock attachment that extends through the right side of the printed circuit board and is located below the reflective sheet, and the lock attachment is used to fix the printed circuit board.
  • the absorbing surface further includes: a first adhesive tape disposed between the bearing surface and the reflective sheet and located on a side of the light-emitting diode, wherein the width of the first adhesive tape is equal to or less than the light-emitting The distance from the diode to the edge of the right side of the carrying surface, and the first tape includes a hole for avoiding the lock attachment between the printed circuit board and the reflective sheet; and a second tape disposed therein Between the light guide plate and the first adhesive tape, the width of the second adhesive tape is equal to or smaller than the distance between the light-emitting diode and the reflective sheet, and the thickness is equal to or larger than the reflective sheet.
  • the color of the second adhesive tape is gray.
  • the liquid crystal display of the present invention comprises: a liquid crystal panel; and a side light backlight module for providing a light source to the liquid crystal panel, the edge light backlight module comprising: a printed circuit
  • the board includes a bearing surface; a plurality of light emitting diodes are disposed on the left side of the carrying surface, each of the light emitting diodes includes an emitting surface, and the light emitted by the light emitting diode is emitted from the exit surface; a reflective sheet is disposed at The right side of this bearing surface;
  • the light plate is disposed above the reflective sheet such that the reflective sheet is located between the light guide plate and the bearing surface; a reflective surface is disposed on one side of the light guide plate and has a distance from the light emitting diode.
  • the light emitted from the exit surface is reflected; and an absorption surface is disposed on the bearing surface and located on one side of the light emitting diode for absorbing light reflected by the reflective surface.
  • the edge-lit backlight module of the present invention and the liquid crystal display using the same have the effect that the absorption surface disposed on the bearing surface is used to absorb the reflection from the reflective surface.
  • the light is used to reduce the light that does not satisfy the total reflection angle to enter the light guide plate, thereby causing a bright spot on the bottom liquid crystal panel to improve the quality of the display image.
  • FIG. 1 is a partial schematic view of a prior art edge-lit backlight module
  • FIG. 2 is a schematic diagram of a prior art edge-lit backlight module and a light path
  • FIG. 3 is a cross-sectional view of a light emitting module according to a first embodiment of the present invention.
  • FIG. 4 is a partial schematic view of a light emitting module according to a first embodiment of the present invention.
  • FIG. 5 is a partial schematic view of a light emitting module according to a second embodiment of the present invention.
  • FIG. 6 is a partial schematic view of a light emitting module according to a third embodiment of the present invention.
  • FIG. 7 is a cross-sectional view of a light emitting module according to a fourth embodiment of the present invention.
  • FIG. 8 is a partial schematic view of a light emitting module according to a fourth embodiment of the present invention.
  • FIG. 9 is a schematic diagram of a liquid crystal display according to a preferred embodiment of the present invention. detailed description
  • the backlight module is an edge-lit backlight module 1 including a printed circuit board (Printed
  • PCB 110 Circuit Board 110
  • LEDs light-emitting diodes
  • LGP light guide plate
  • the printed circuit board 110 includes a carrying surface 111.
  • the LED 130 includes an exit surface 131.
  • the light emitting diode 130 is disposed on the left portion of the printed circuit board 110 and the reflective sheet 150 is disposed on the right portion of the printed circuit board 110.
  • the absorbing surface 120 is disposed on the carrying surface 111 and located between the LED 130 and the reflective sheet 150, and is located on the side of the LED 130 for absorbing the light reflected by the reflecting surface 140.
  • the absorbing surface 120 may also extend in the direction of the reflective sheet 150 such that a portion of the absorbing surface 120 is positioned between the reflective sheet 150 and the light guide plate 160.
  • the light guide plate 160 is disposed above the reflective sheet 150 such that the reflective sheet 150 is positioned on the light guide plate 160. And between the bearing surfaces 111.
  • the reflecting surface 140 is disposed on one side of the light guide plate 160 and has a distance from the light emitting diode 130.
  • the reflecting surface 160 is for reflecting the light emitted by the exit surface 131 of the LED 130.
  • the reflective surface 140 can be formed by a plastic frame, a back plate, or a reflective sheet 150, but is not limited thereto.
  • the material of the absorbing surface 120 may be a pigment, a gel, a soft object tape or a heat dissipating tape; the color of the absorbing surface 120 may be black or gray, but not limited thereto.
  • the absorbing surface 120 is a gray heat dissipating tape, and the heat dissipating tape has a thickness equal to or larger than the reflecting sheet.
  • FIG. 5 is a partial schematic view of a light emitting module according to a second embodiment of the present invention.
  • the structure of the backlight module 2 is similar to that of the first embodiment, and will not be described herein. However, the difference from the first embodiment lies in the position and material of the absorbing surface 230.
  • the absorbing surface 230 is disposed on the carrying surface of the printed circuit board 210 and between each two adjacent light emitting diodes 220 adjacent to the light emitting diode 220.
  • the length of the absorption surface 230 is equal to or smaller than the width of the printed circuit board 210.
  • the material of the absorbing surface 230 may be a pigment, a gel, a soft object tape or a heat dissipating tape; the color of the absorbing surface 230 may be black or gray, but not limited thereto.
  • the absorbing surface 230 is a black pigment.
  • FIG. 6 is a partial schematic view of a light emitting module according to a third embodiment of the present invention.
  • the structure of the backlight module 3 is similar to that of the first embodiment, and will not be described herein. However, the difference from the first embodiment lies in the position and material of the absorption surface 330.
  • the absorbing surface 330 is disposed on the bearing surface of the printed circuit board 310 and between each two adjacent LEDs 320 adjacent to the LEDs 320.
  • the length of the absorbing surface 320 is equal to or less than the maximum length of the LED 320 projected onto the printed circuit board 310.
  • the material of the absorbing surface 330 may be a pigment, a gel, a soft object tape or a heat dissipating tape; the color of the dark surface may be black or gray, but not limited thereto.
  • the absorbent surface 320 is a black or gray gel or soft object tape.
  • FIG. 8 is a partial schematic view of a light emitting module according to a fourth embodiment of the present invention.
  • the backlight module 4 includes a printed circuit board 410, a plurality of light emitting diodes 440, a reflective sheet 460, a light guide plate 470, a reflective surface 450, a lock attachment, and a absorbing surface.
  • the printed circuit board 410 described therein includes a carrying surface 411.
  • the lock attachment is a screw 480 comprising a screw cap 481.
  • the absorption surface includes a first tape 420 and a second tape 430.
  • a light emitting diode 440 is disposed on the left portion of the printed circuit board 410 and a reflective sheet 460 is disposed on the right portion of the printed circuit board 410.
  • the first tape 420 is disposed between the bearing surface 411 and the reflective sheet and on the side of the light emitting diode 440.
  • the first tape 420 has a width equal to or smaller than the distance from the LED 440 to the edge of the right side of the bearing surface 411, and the first tape 420 includes a hole for avoiding the position on the printed circuit board 410 and the reflection.
  • Screw 480 between pieces 460. The screw 480 extends through the first tape 420 and the right side of the printed circuit board 410 and is located below the reflective sheet 460.
  • the screw 480 is used to fix the printed circuit board 410.
  • the light guide plate 470 is disposed above the reflective sheet 460, and the reflective sheet 460 is disposed between the light guide plate 470 and the screw cap 481.
  • the second adhesive tape 430 is disposed between the light guide plate 470 and the first adhesive tape 420, and has a thickness equal to or Larger than the reflective sheet 460.
  • This The reflective surface 450 is disposed on one side of the light guide plate 470 and has a distance from the light emitting diode 440. The reflective surface 450 reflects the light emitted from the exit surface of the light emitting diode 440.
  • the first tape 420 and the second tape 430 are gray in color.
  • FIG. 9 is a schematic diagram of a liquid crystal display according to a preferred embodiment of the present invention.
  • the liquid crystal display includes a liquid crystal panel 600 and an edge light backlight module 500.
  • the edge-lit backlight module 500 is configured to provide a light source to the liquid crystal panel 600 to display an image.
  • the edge-lit backlight module 500 is the edge-lit backlight module 500 disclosed in the first embodiment, the second embodiment, the third embodiment, or the fourth embodiment.
  • the liquid crystal display further includes components such as a plastic frame, a front frame, a back plate, a heat sink and an optical film.
  • the above components and related structures are prior art, and are not described herein.
  • the edge-lit backlight module of the present invention and the liquid crystal display using the same are provided in that the dark surface disposed on the bearing surface is used to absorb the reflection from the reflective surface. Light, to reduce the light that does not meet the total reflection angle into the light guide plate, thus producing a bright spot on the bottom liquid crystal panel, improving the quality of the display picture.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Planar Illumination Modules (AREA)
  • Liquid Crystal (AREA)

Abstract

一种侧光式背光模组（1）及其液晶显示器，此侧光式背光模组（1）包括：一印刷电路板（110），包括一承载面（111）；多数个发光二极管（130），设置在此承载面（111）的左部，每一此发光二极管（130）包括一出射面（131），此发光二极管（130）所发出的光由此出射面（131）射出；一反射片（150），设置在此承载面（111）的右部；一导光板（160），设置在此反射片（150）的上方，使此反射片（150）位于此导光板（160）以及此承载面（111）之间；一反射面（140），设置在此导光板（160）的一侧，并与此发光二极管（130）有一距离，此反射面（140）用以反射此出射面（131）所射出的光；以及一吸收面（120），设置在此承载面（111）上，并位于此发光二极管（130）一侧，用以吸收由此反射面（140）所反射的光，因而降低液晶面板上产生的亮点，提高显示画面的质量。

Description

侧光式背光模组及其液晶显示器
技术领域
本发明是有关于一种侧光式背光模组及其使用此侧光式背光模组的液晶显示器，特别 是有关于一种具有暗面的侧光式背光模组及其使用此侧光式背光模组的液晶显示器。 背景技术
由于液晶本身并不会发光， 因此背光模组可谓为液晶显示（l iquid crystal display, LCD)面板的关键零组件，其主要功能便在供应亮度充分及分布均匀的光源， 以使 LCD面板能够正常显示影像。 而随着 LCD面板已广泛应用于众多具成长潜力的电子产品， 如监视器 (monitor)、 笔记型计算机、 数字相机、 投影机等等， 背光模组及其相关零组件 的需求也持续成长中。
一般而言， 背光模组可分为直下式（direct— type)与侧光式（edge— type)两种设计， 其中直下式设计系将背光源，例如荧光灯管设置于背光模组的正下方，并可使用两支以上 的灯管来增加光源强度， 因此适用于较高亮度需求或较大尺寸的显示面板，例如 LCD监视 器或 LCD电视。此外， 由于侧光式背光模组系将光源产生器设于显示面板的侧边， 再利用 导光板（l ight guide plate, LGP)将光源产生器的光线均匀导入显示面板中， 因此可縮小 液晶显示器的体积与制造成本， 而应用于小型的电器产品。
图 1为先前技术侧光式背光模组部份示意图。先前技术侧光式背光模组 9包括一印刷 电路板 910、 发光二极管 920、 一反射片 940、 一导光板 950以及一反射面 930。
在印刷电路板 910上的左侧设置此发光二极管 920以及在印刷电路板 910上的右侧设 置此反射片 940。此导光板 950设置在反射片 940的上方， 使此反射片 940位于此导光板 950以及此印刷电路板 910之间。此反射面 930设置在此导光板 950的一侧， 并与发光二 极管 920有一距离， 此反射面 930用以反射发光二极管 920所射出的光。 在实际组装中， 由于反射片 940存在裁切公差、组装公差以及发光二极管 920组装偏差等因素， 因此反射 片 940的长度会短于导光板 950的长度。
图 2为先前技术侧光式背光模组以及光线路径示意图。当发光二极管 920发出一光线 960时， 经由反射片 930反射到此印刷电路板 910， 此光线 960再经由印刷电路板 910的 反射进入此导光板 950。因为进入此导光板 950的光线 960不满足全反射角，因此光线 960 立刻从导光板 950的出射面射出， 造成亮点的产生， 严重影响画面的质量。
因此，便需要提供一种减少不满足全反射角的光线进入导光板的背光模组及其使用所 述的背光模组的液晶显示器， 以解决前述的问题。 发明内容
本发明的目的在于，克服现有的侧光式背光模组所存在的缺陷，而提供一种新型结构 的侧光式背光模组，所要解决一技术问题是使其可以解决因为不满足全反射角的光线进入 导光板， 因而造成亮点的产生， 严重影响画面的质量。
本发明的另一目的在于，克服现有的液晶显示器存在的缺陷，而提供一种使用新型结 构的侧光式背光模组的液晶显示器，所要解决一技术问题是使其可以解决因为不满足全反 射角的光线进入导光板， 因而造成亮点的产生， 严重影响画面的质量。
为达成上述提供侧光式背光模组目的， 本发明提出的侧光式背光模组， 其包括： 一印 刷电路板包括一承载面；多数个发光二极管设置在此承载面的左部，每一此发光二极管包 括一出射面，此发光二极管所发出的光由此出射面射出；一反射片设置在此承载面的右部; 一导光板设置在此反射片的上方，使此反射片位于此导光板以及此承载面之间；一反射面， 设置在此导光板的一侧，并与此发光二极管有一距离，此反射面用以反射此出射面所射出 的光； 以及一吸收面设置在此承载面上， 并位于此发光二极管一侧， 用以吸收由此反射面 所反射的光。
前述的侧光式背光模组， 此吸收面设置在此承载面上并在每两相邻此发光二极管之 间。
前述的侧光式背光模组， 此吸收面的材料为黑色颜料。
前述的侧光式背光模组，此吸收面的材料为一胶状物或一软性物体胶带，其中此胶状 物以及此软性物体胶带的颜色为黑色或灰色。
前述的侧光式背光模组，此吸收面设置在此承载面上并在此发光二极管与此反射片之 间且暗面的材料为灰色的散热胶带， 此散热胶带的厚度为等于或大于此反射片。
前述的侧光式背光模组还包括一锁附件，此锁附件贯穿此印刷电路板的右侧，且位在 此反射片的下方， 此锁附件用以固定此印刷电路板。
前述的侧光式背光模组， 此吸收面还包括： 一第一胶带， 设置在此承载面与反射片之 间并位于此发光二极管一侧，此第一胶带的宽度为等于或小于此发光二极管到此承载面右 部的边缘的距离，且此第一胶带包括一孔洞，用以避开位在此印刷电路板及此反射片之间 的锁附件； 以及一第二胶带， 设置在此导光板以及此第一胶带之间， 此第二胶带的宽度为 等于或小于此发光二极管到此反射片之间的距离，厚度为等于或大于此反射片，此第二胶 带的颜色为灰色。
为达成上述提供的目的， 本发明提出的液晶显示器， 其包括： 一液晶面板； 以及一侧 光式背光模组， 用以提供光源至此液晶面板， 此侧光式背光模组包括： 一印刷电路板， 包 括一承载面； 多数个发光二极管， 设置在此承载面的左部， 每一此发光二极管包括一出射 面， 此发光二极管所发出的光由此出射面射出； 一反射片， 设置在此承载面的右部； 一导 光板， 设置在此反射片的上方， 使此反射片位于此导光板以及此承载面之间； 一反射面， 设置在此导光板的一侧，并与此发光二极管有一距离，此反射面用以反射此出射面所射出 的光； 以及一吸收面， 设置在此承载面上， 并位于此发光二极管一侧， 用以吸收由此反射 面所反射的光。
综上所述，本发明的侧光式背光模组及其使用此侧光式背光模组的液晶显示器其效果 在于， 利用设置在承载面上的吸收面， 用以吸收由此反射面所反射的光， 以减少不满足全 反射角的光线进入导光板， 因而降底液晶面板上的产生亮点， 提高显示画面的质量。
上述说明仅是本发明技术方案的概述， 为了能够更清楚了解本发明的技术手段， 并可 依照说明书的内容予以实施， 以下以本发明的较佳实施例并配合附图详细说明如后。 附图说明
图 1为先前技术侧光式背光模组部份示意图；
图 2为先前技术侧光式背光模组以及光线路径示意图；
图 3为本发明第一实施例发光模组的剖面图；
图 4为本发明第一实施例发光模组的部份示意图；
图 5为本发明第二实施例发光模组的部份示意图；
图 6为本发明第三实施例发光模组的部份示意图；
图 7为本发明第四实施例发光模组的剖面图；
图 8为本发明第四实施例发光模组的部份示意图； 以及
图 9为本发明较佳实施例的液晶显示器示意图。 具体实施方式
以下结合附图所示的较佳实施例作进一步详述。
图 3为本发明第一实施例发光模组的剖面图。同时请参阅图 4为本发明第一实施例发 光模组的部份示意图。 此背光模组为侧光式背光模组 1包括一印刷电路板 (Printed
Circuit Board, PCB) 110、 多数个发光二极管（Light-Emitting Diode, LED) 130、 一反射 片 150、 一导光板（Light Guide Plate, LGP) 160、 一反射面 140以及一吸收面 120。 其中 此印刷电路板 110包括一承载面 111。 其中此发光二极管 130包括一出射面 131。
在印刷电路板 110上的左部设置此发光二极管 130以及在印刷电路板 110上的右部设 置此反射片 150。此吸收面 120设置在此承载面 111上并位在此发光二极管 130与此反射 片 150之间， 且位于所述的发光二极管 130—侧， 用以吸收由此反射面 140所反射的光， 此吸收面 120也可以向反射片 150的方向延伸，使部份的吸收面 120位在反射片 150与导 光板 160之间。 此导光板 160设置在反射片 150的上方， 使反射片 150位在导光板 160 以及承载面 111之间。 此反射面 140设置在导光板 160的一侧， 并与此发光二极管 130 有一距离。此反射面 160用以反射由发光二极管 130的出射面 131所射出的光。此反射面 140可由胶框、 背板、 或反射片 150所折弯成型， 但不以此为限。 此吸收面 120的材料可 为颜料、胶状物、 软性物体胶带或散热胶带； 此吸收面 120的颜色可为黑色或灰色， 但不 以此为限。 由于黑色吸光性能好， 画面可能表现为黑带； 而白色反光性能好， 画面可能表 现为亮带， 因此所述吸收面 120的颜色更优选为灰色。在本发明第一实施例中， 所述的吸 收面 120为灰色的散热胶带， 此散热胶带的厚度为等于或大于此反射片。
图 5为本发明第二实施例发光模组的部份示意图。此背光模组 2的结构与第一实施例 相似， 在此不于赘述。但与第一实施例不同的地方在于， 吸收面 230的位置与材料。此吸 收面 230设置在此印刷电路板 210的承载面上，并位于每两个相邻的发光二极管 220之间， 且临近所述的发光二极管 220。 此吸收面 230的长度等于或小于印刷电路板 210的宽度。 此吸收面 230的材料可为颜料、胶状物、软性物体胶带或散热胶带； 此吸收面 230的颜色 可为黑色或灰色， 但不以此为限。 在本发明第二实施例中， 此吸收面 230为黑色的颜料。
图 6为本发明第三实施例发光模组的部份示意图。此背光模组 3的结构与第一实施例 相似， 在此不于赘述。但与第一实施例不同的地方在于， 吸收面 330的位置以及材料。此 吸收面 330设置在此印刷电路板 310的承载面上， 并位于每两个相邻的发光二极管 320 之间， 且临近所述的发光二极管 320。此吸收面 320的长度等于或小于发光二极管 320投 影在印刷电路板 310上的最大长度。此吸收面 330的材料可为颜料、胶状物、软性物体胶 带或散热胶带； 此暗面的颜色可为黑色或灰色， 但不以此为限。 在本发明第三实施例中， 此吸收面 320为黑色或灰色的胶状物或软性物体胶带。
图 7为本发明第四实施例发光模组的剖面图。 同时请参阅图 8， 图 8为本发明第四实 施例发光模组的部份示意图。 此背光模组 4为侧光式背光模组 4包括一印刷电路板 410、 多数个发光二极管 440、 一反射片 460、 一导光板 470、一反射面 450、 一锁附件以及一吸 收面。其中所述的印刷电路板 410包括一承载面 411。其中此鎖附件为一螺丝 480包括一 螺丝帽 481。 其中此吸收面包括一第一胶带 420以及一第二胶带 430。
在印刷电路板 410上的左部设置发光二极管 440以及在印刷电路板 410上的右部设置 反射片 460。 此第一胶带 420， 设置在所述的承载面 411与所述的反射片之间并位于发光 二极管 440—侧。 此第一胶带 420宽度为等于或小于此发光二极管 440到此承载面 411 右部的边缘的距离，且此第一胶带 420包括一孔洞，用以避开位在此印刷电路板 410及此 反射片 460之间的螺丝 480。此螺丝 480贯穿此第一胶带 420以及此印刷电路板 410的右 侧， 且位于此反射片 460的下方， 此螺丝 480用以固定此印刷电路板 410。 此导光板 470 设置在反射片 460的上方，使反射片 460位于导光板 470以及螺丝帽 481之间此第二胶带 430设置在此导光板 470以及此第一胶带 420之间， 厚度为等于或大于此反射片 460。 此 反射面 450设置在此导光板 470的一侧， 并与此发光二极管 440有一距离， 反射面 450 用以反射由此发光二极管 440的出射面所射出的光。 在本发明第四实施例中此第一胶带 420以及此第二胶带 430颜色为灰色。
图 9为本发明较佳实施例的液晶显示器示意图。液晶显示器包括一液晶面板 600及一 侧光式背光模组 500。 此侧光式背光模组 500用以提供光源至此液晶面板 600， 以显示一 影像。 在本发明实施例中， 此侧光式背光模组 500为前述中的施实例 1、 施实例 2、 施实 例 3或施实例 4的其中之一所揭露的侧光式背光模组 500。其中此液晶显示器还包括胶框、 前框、背板、 散热片以及光学膜片等组件， 但上述的组件以及相关结构为先前的技术， 在 此则不于赘述。
由上述可知，本发明的侧光式背光模组及其使用此侧光式背光模组的液晶显示器其效 果在于， 利用设置在承载面上的暗面， 用以吸收由此反射面所反射的光， 以减少不满足全 反射角的光线进入导光板， 因而降底液晶面板上的产生亮点， 提高显示画面的质量。
以上， 仅为本发明的较佳实施例， 意在进一步说明本发明， 而非对其进行限定。 凡根 据上述的文字和附图所公开的内容进行的简单的替换， 都在本专利的权利保护范围之列。

Claims

权利要求
一种侧光式背光模组， 包括：
一印刷电路板， 包括一承载面；
多数个发光二极管， 设置在所述的承载面的左部， 每一所述的发光二极管包括一 出射面， 所述的发光二极管所发出的光由所述的出射面射出；
一反射片， 设置在所述的承载面的右部；
一导光板， 设置在所述的反射片的上方， 使所述的反射片位于所述的导光板以及 所述的承载面之间；
一反射面， 设置在所述的导光板的一侧， 并与所述的发光二极管有一距离， 所述 的反射面用以反射所述的出射面所射出的光；
一吸收面， 设置在所述的承载面上， 并位于所述的发光二极管一侧， 用以吸收由 所述的反射面所反射的光，所述的吸收面设置在所述的承载面上并在每两相邻所述的 发光二极管之间， 所述的吸收面的材料为一胶状物或一软性物体胶带， 其中所述的胶 状物以及所述的软性物体胶带的颜色为黑色或灰色，所述的吸收面设置在所述的承载 面上并在所述的发光二极管与所述的反射片之间，所述的散热胶带的厚度为等于或大 于所述的反射片， 所述的吸收面还包括：
一第一胶带， 设置在所述的承载面与所述的反射片之间并临近所述的发光二 极管， 所述的第一胶带的宽度为等于或小于所述的发光二极管到所述的承载面右 部的边缘的距离， 且所述的第一胶带包括一孔洞， 用以避开位于所述的印刷电路 板及所述的反射片之间的所述的锁附件； 以及
一第二胶带， 设置在所述的导光板以及所述的第一胶带之间， 所述的第二胶 带的宽度为等于或小于所述的发光二极管到所述的反射片之间的距离， 厚度为等 于或大于所述的反射片， 所述的第二胶带的颜色为灰色； 以及
一锁附件， 所述的锁附件贯穿所述的印刷电路板的右侧， 且位于所述的反射片的 下方， 所述的锁附件用以固定所述的印刷电路板。
一种侧光式背光模组， 包括：
一印刷电路板， 包括一承载面；
多数个发光二极管， 设置在所述的承载面的左部， 每一所述的发光二极管包括一 出射面， 所述的发光二极管所发出的光由所述的出射面射出；
一反射片， 设置在所述的承载面的右部；
一导光板， 设置在所述的反射片的上方， 使所述的反射片位于所述的导光板以及 所述的承载面之间；
一反射面， 设置在所述的导光板的一侧， 并与所述的发光二极管有一距离， 所述 的反射面用以反射所述的出射面所射出的光； 以及
一吸收面， 设置在所述的承载面上， 并位于所述的发光二极管一侧， 用以吸收由 所述的反射面所反射的光。
3、 如权利要求 2所述的侧光式背光模组， 其中， 所述的吸收面设置在所述的承载面上并 在每两相邻所述的发光二极管之间。
4、 如权利要求 3所述的侧光式背光模组， 其中， 所述的吸收面的材料为黑色颜料。
5、 如权利要求 3所述的侧光式背光模组， 其中， 所述的吸收面的材料为一胶状物或一软 性物体胶带， 其中所述的胶状物以及所述的软性物体胶带的颜色为黑色或灰色。
6、 如权利要求 2所述的侧光式背光模组， 其中， 所述的吸收面设置在所述的承载面上并 在所述的发光二极管与所述的反射片之间。
7、如权利要求 6所述的侧光式背光模组， 其中， 所述的吸收面的材料为灰色的散热胶带， 所述的散热胶带的厚度为等于或大于所述的反射片。
8、 如权利要求 2所述的侧光式背光模组， 其中， 还包括一锁附件， 所述的锁附件贯穿所 述的印刷电路板的右侧， 且位于所述的反射片的下方， 所述的锁附件用以固定所述的 印刷电路板。
9、 如权利要求 8所述的侧光式背光模组， 其中， 所述的吸收面还包括：
一第一胶带， 设置在所述的承载面与所述的反射片之间并临近所述的发光二极 管，所述的第一胶带的宽度为等于或小于所述的发光二极管到所述的承载面右部的边 缘的距离， 且所述的第一胶带包括一孔洞， 用以避开位于所述的印刷电路板及所述的 反射片之间的所述的锁附件； 以及
一第二胶带， 设置在所述的导光板以及所述的第一胶带之间， 所述的第二胶带的 宽度为等于或小于所述的发光二极管到所述的反射片之间的距离，厚度为等于或大于 所述的反射片。
10、 如权利要求 9所述的侧光式背光模组， 其中， 所述的第二胶带的颜色为灰色。
11、 一种液晶显示器， 包括：
一液晶面板； 以及
一侧光式背光模组， 用以提供光源至所述的液晶面板， 所述的侧光式背光模组包 括：
一印刷电路板， 包括一承载面；
多数个发光二极管， 设置在所述的承载面的左部， 每一所述的发光二极管包括一 出射面， 所述的发光二极管所发出的光由所述的出射面射出；
一反射片， 设置在所述的承载面的右部；
一导光板， 设置在所述的反射片的上方， 使所述的反射片位于所述的导光板以及 所述的承载面之间；
一反射面， 设置在所述的导光板的一侧， 并与所述的发光二极管有一距离， 所述 的反射面用以反射所述的出射面所射出的光； 以及
一吸收面， 设置在所述的承载面上， 并位于所述的发光二极管一侧， 用以吸收由 所述的反射面所反射的光。
PCT/CN2012/076131 2012-03-27 2012-05-26 侧光式背光模组及其液晶显示器 Ceased WO2013143225A1 (zh)

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