WO2014056264A1 - 背光模组 - Google Patents

背光模组 Download PDF

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Publication number
WO2014056264A1
WO2014056264A1 PCT/CN2012/083526 CN2012083526W WO2014056264A1 WO 2014056264 A1 WO2014056264 A1 WO 2014056264A1 CN 2012083526 W CN2012083526 W CN 2012083526W WO 2014056264 A1 WO2014056264 A1 WO 2014056264A1
Authority
WO
WIPO (PCT)
Prior art keywords
back frame
engaging groove
backlight module
convex portion
side plate
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/CN2012/083526
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English (en)
French (fr)
Inventor
俞刚
顾毓波
杨流洋
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
Original Assignee
Shenzhen China Star Optoelectronics Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Shenzhen China Star Optoelectronics Technology Co Ltd filed Critical Shenzhen China Star Optoelectronics Technology Co Ltd
Priority to US13/704,004 priority Critical patent/US9004739B2/en
Publication of WO2014056264A1 publication Critical patent/WO2014056264A1/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
    • G02B6/0081—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
    • 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
    • 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

Definitions

  • the present invention relates to the field of liquid crystal display, and in particular to a backlight module. Background technique
  • Liquid crystal display has many advantages such as thin body, power saving, and no radiation, and has been widely used.
  • Most of the liquid crystal display devices on the market are backlight type liquid crystal display devices, which include a liquid crystal panel and a backlight module.
  • the working principle of the liquid crystal panel is to place liquid crystal molecules in two parallel glass substrates. There are many vertical and horizontal small wires between the two glass substrates, and the liquid crystal molecules are controlled to change direction by energization or not, and the light of the backlight module is refracted. Come out to produce the picture. Since the liquid crystal panel itself does not emit light, the light source provided by the backlight module needs to be used to display the image normally. Therefore, the backlight module becomes one of the key components of the liquid crystal display device.
  • the backlight module is divided into a side-in backlight module and a direct-lit backlight module according to different incident positions of the light source.
  • a light source such as a CCFL (Cold Cathode Fluorescent Lamp) or an LED (Light Emitting Diode) is disposed behind the liquid crystal panel to directly form a surface light source for the liquid crystal panel.
  • the side-lit backlight module has a backlight LED strip (Light bar) disposed on the edge of the back panel behind the liquid crystal panel, and the light emitted by the LED strip is incident on the light guide plate (LGP, Light Guide Plate) side. The surface enters the light guide plate, is reflected and diffused, and is emitted from the light exit surface of the light guide plate, and then passes through the optical film group to form a surface light source to be supplied to the liquid crystal panel.
  • LGP Light Guide Plate
  • the existing edge-lit backlight module includes: a back frame, a backlight disposed in the back frame, a reflective sheet disposed in the back frame, a light guide plate disposed on the reflective sheet, and an optical film set disposed on the light guide plate.
  • the object of the present invention is to provide a backlight module, in which the back frame and the plastic frame are assembled and fixed by means of interference fit, and the structure is simple and convenient to install.
  • the present invention provides a backlight module, including: a back frame, a backlight disposed in the back frame, a reflective sheet disposed in the back frame, a light guide plate disposed on the reflective sheet, and a back frame a plastic frame on the upper frame, wherein the plastic frame is provided with a convex portion, and the back frame is provided with a corresponding convex portion
  • the groove has an interference fit with the engaging groove, and the plastic frame is fixedly connected to the back frame by an interference fit connection between the protruding portion and the engaging groove.
  • the convex portion has a trapezoidal cross section.
  • the shape of the engaging groove is set corresponding to the shape of the convex portion, and the size of the engaging groove is smaller than the size of the protruding portion.
  • the back frame includes a bottom plate and a first side plate.
  • the engaging groove is disposed on the first side plate.
  • the plastic frame includes a top plate and a second side plate.
  • the protrusion is disposed on an end surface of the free end of the second side plate.
  • the heat sink disposed under the reflective sheet, a diffusion sheet disposed on the light guide plate, and a prism sheet disposed on the diffusion sheet.
  • the backlight is a linear light source.
  • the present invention further provides a backlight module, including: a back frame, a backlight disposed in the back frame, a reflective sheet disposed in the back frame, a light guide plate disposed on the reflective sheet, and a plastic frame disposed on the back frame
  • the plastic frame is provided with a convex portion
  • the convex portion of the back frame is provided with an engaging groove
  • the convex portion is interference-fitted with the engaging groove, and the convex portion and the engaging groove are
  • the interference fit connection is fixedly connected to the back frame;
  • the convex portion has a trapezoidal cross section
  • the shape of the engaging groove is set corresponding to the shape of the convex portion, and the size of the engaging groove is smaller than the size of the convex portion;
  • the back frame includes a bottom plate and a first side plate
  • the engaging groove is disposed on the first side plate
  • the plastic frame includes a top plate and a second side plate
  • the protrusion is disposed on an end surface of the free end of the second side plate
  • the invention further includes a heat sink disposed under the reflective sheet, a diffusion sheet disposed on the light guide plate, and a prism sheet disposed on the diffusion sheet;
  • the backlight is a linear light source.
  • the backlight module provided by the present invention is provided with a convex portion on the plastic frame, and an engaging groove which is connected with the convex portion in an interference fit is arranged on the back frame, and the interference fit is used.
  • the plastic frame is fixedly mounted on the back frame, and has a simple structure and convenient installation, which can effectively save time and control costs.
  • FIG. 1 is a schematic structural view of a backlight module of the present invention. detailed description
  • a backlight module includes: a back frame 10 , a backlight 20 disposed in the back frame 10 , a reflective sheet 30 disposed in the back frame 10 , and a light guide plate disposed on the reflective sheet 30 . 40.
  • the plastic frame 50 is disposed on the back frame 10.
  • a protrusion 502 is disposed on the frame 50, and the corresponding protrusion 502 is disposed on the back frame 10, and the protrusion 502 is interference-fitted with the engagement groove 102. The interference fit between the portion 502 and the engaging groove 102 securely connects the plastic frame 50 to the back frame 10.
  • the convex portion 502 has a trapezoidal cross section, and the shape of the engaging groove 102 is corresponding to the shape of the convex portion 502, and the size of the engaging groove 102 is slightly smaller than the size of the convex portion 502.
  • the plastic frame 50 is directly pressed against the back frame 10, and the convex portion 502 is pressed into the engaging groove 102, and the convex portion 502 and the engaging groove 102 form an interference fit connection, and the plastic frame 50 is further assembled. It is fixedly mounted on the back frame 10, and the installation method is simple and saves time.
  • the back frame 10 includes a bottom plate 12 and a first side plate 14.
  • the engaging groove 102 is disposed on the first side plate 14.
  • the plastic frame 50 includes a top plate 52 and a second side plate.
  • the raised portion 502 is disposed on an end surface of the free end of the second side plate 54.
  • the backlight module of the present invention further includes a heat sink 60 disposed under the reflective sheet 30, a diffusion sheet 70 disposed on the light guide plate 40, and a prism sheet 80 disposed on the diffusion sheet 70.
  • the backlight 20 is a linear light source, and a part of the light emitted directly enters the light guide plate 40 through the light incident surface of the light guide plate 40, and the other portion is reflected by the reflective sheet 30 and enters the light guide plate 40.
  • the light is in the light guide plate 40. Propagation, simultaneous total reflection, refraction, etc., is further scattered by the diffusion sheet 70 and the prism sheet 80 to provide a uniformly distributed surface light source.
  • the backlight module provided by the present invention is provided with a convex portion on the plastic frame, and an engaging groove which is connected with the convex portion in an interference fit is arranged on the back frame, and the interference fit connection is adopted.
  • the plastic frame is fixedly mounted on the back frame, and has a simple structure and convenient installation, which can effectively save time and control costs.

Landscapes

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

Description

背光模组 技术领域
本发明涉及液晶显示领域， 尤其涉及一种背光模组。 背景技术
液晶显示装置 （LCD , Liquid Crystal Display )具有机身薄、 省电、 无 辐射等众多优点， 得到了广泛的应用。 现有市场上的液晶显示装置大部分 为背光型液晶显示装置， 其包括液晶面板及背光模组 （ backlight module ) 。 液晶面板的工作原理是在两片平行的玻璃基板当中放置液晶分 子， 两片玻璃基板中间有许多垂直和水平的细小电线， 通过通电与否来控 制液晶分子改变方向， 将背光模组的光线折射出来产生画面。 由于液晶面 板本身不发光， 需要借由背光模组提供的光源来正常显示影像， 因此， 背 光模组成为液晶显示装置的关键组件之一。 背光模组依照光源入射位置的 不同分成侧入式背光模组与直下式背光模组两种。 直下式背光模组是将发 光光源例如 CCFL(Cold Cathode Fluorescent Lamp , 阴极萤光灯管）或 LED(Light Emitting Diode发光二极管)设置在液晶面板后方， 直接形成面 光源提供给液晶面板。 而侧入式背光模组是将背光源 LED 灯条（Light bar )设于液晶面板侧后方的背板边缘， LED 灯条发出的光线从导光板 ( LGP , Light Guide Plate )一侧的入光面进入导光板， 经反射和扩散后 从导光板出光面射出， 再经由光学膜片组， 以形成面光源提供给液晶面 板。
现有侧入式背光模组包括： 背框、 设于背框内的背光源、 设于背框内 的反射片、 设于反射片上的导光板、 设于导光板上的光学膜片组、 设于背 框上的胶框。 背框与胶框通常采用螺丝锁合的方式固定， 该组装方式需要 使用其它工具， 安装及拆卸都不太方便， 耗费工时。 发明内容
本发明的目的在于提供一种背光模组， 其背框与胶框采用过盈配合连 接的方式组装固定， 结构简单， 安装方便。
为实现上述目的， 本发明提供一种背光模组， 包括： 背框、 设于背框 内的背光源、 设于背框内的反射片、 设于反射片上的导光板、 及设于背框 上的胶框， 所述胶框上设有凸起部， 所述背框上对应该凸起部设有卡合 槽， 该凸起部与该卡合槽过盈配合， 通过凸起部与卡合槽之间的过盈配合 连接将胶框固定连接于背框上。
所述凸起部的截面呈梯形。
所述卡合槽的形状对应所述凸起部的形状设置且卡合槽的大小小于凸 起部的大小。
所述背框包括底板和第一侧板。
所述卡合槽设于所述第一侧板上。
所述胶框包括顶板和第二侧板。
所述凸起部设于所述第二侧板自由端的端面上。
还包括设于反射片下的散热片、 设于导光板上的扩散片及设于扩散片 上的棱镜片。
所述背光源为线性光源。
本发明还提供一种背光模组， 包括： 背框、 设于背框内的背光源、 设 于背框内的反射片、 设于反射片上的导光板、 及设于背框上的胶框， 所述 胶框上设有凸起部， 所述背框上对应该凸起部设有卡合槽， 该凸起部与该 卡合槽过盈配合， 通过凸起部与卡合槽之间的过盈配合连接将胶框固定连 接于背框上；
其中， 所述凸起部的截面呈梯形；
其中， 所述卡合槽的形状对应所述凸起部的形状设置且卡合槽的大小 小于凸起部的大小；
其中， 所述背框包括底板和第一侧板；
其中， 所述卡合槽设于所述第一侧板上；
其中， 所述胶框包括顶板和第二侧板；
其中， 所述凸起部设于所述第二侧板自由端的端面上；
还包括设于反射片下的散热片、 设于导光板上的扩散片及设于扩散片 上的棱镜片；
其中， 所述背光源为线性光源。
本发明的有益效果： 本发明提供的背光模组， 其通过在胶框上设置凸 起部， 在背框上设置与凸起部过盈配合连接的卡合槽， 采用过盈配合连接 的方式将胶框固定安装于背框上， 其结构简单， 安装方便， 可有效节约时 间， 进而控制成本。
为了能更进一步了解本发明的特征以及技术内容， 请参阅以下有关本 发明的详细说明与附图， 然而附图仅提供参考与说明用， 并非用来对本发 明加以限制。 附图说明
下面结合附图， 通过对本发明的具体实施方式详细描述， 将使本发明 的技术方案及其它有益效果显而易见。
附图中，
图 1为本发明背光模组的结构示意图。 具体实施方式
为更进一步阐述本发明所采取的技术手段及其效果， 以下结合本发明 的优选实施例及其附图进行详细描述。
参阅图 1 , 本发明提供一种背光模组， 包括： 背框 10、 设于背框 10 内的背光源 20、 设于背框 10 内的反射片 30、 设于反射片 30上的导光板 40、 及设于背框 10上的胶框 50。 所述胶框 50上设有凸起部 502, 所述背 框 10上对应该凸起部 502设有卡合槽 102, 该凸起部 502与该卡合槽 102 过盈配合， 通过凸起部 502 与卡合槽 102之间的过盈配合连接将胶框 50 固定连接于背框 10上。
本实施例中， 所述凸起部 502的截面呈梯形， 所述卡合槽 102的形状 对应所述凸起部 502的形状设置且卡合槽 102的大小略小于凸起部 502的 大小。 组装时， 胶框 50直接往背框 10上压下， 将凸起部 502压入卡合槽 102内， 凸起部 502与卡合槽 102之间形成过盈配合连接， 进而将胶框 50 固定安装于背框 10上， 安装方法简单， 节约时间。
所述背框 10包括底板 12和第一侧板 14, 所述卡合槽 102设于该第一 侧板 14上。 所述胶框 50包括顶板 52和第二侧板 54, 所述凸起部 502设 于该第二侧板 54自由端的端面上。
本发明背光模组还包括设于反射片 30下的散热片 60、 设于导光板 40 上的扩散片 70及设于扩散片 70上的棱镜片 80。 所述背光源 20为线性光 源， 其发出的光线， 一部分直接通过导光板 40 的入光面进入导光板 40 内， 另一部分通过反射片 30反射后进入导光板 40 内， 光线在导光板 40 内传播， 同时发生全反射、 折射等， 再经扩散片 70和棱镜片 80的进一步 散射， 进而提供分布均匀的面光源。
综上所述， 本发明提供的背光模组， 其通过在胶框上设置凸起部， 在 背框上设置与凸起部过盈配合连接的卡合槽， 采用过盈配合连接的方式将 胶框固定安装于背框上， 其结构简单， 安装方便， 可有效节约时间， 进而 控制成本。 以上所述， 对于本领域的普通技术人员来说， 可以根据本发明的技术 方案和技术构思作出其他各种相应的改变和变形， 而所有这些改变和变形 都应属于本发明权利要求的保护范围。

Claims

权 利 要 求
1、 一种背光模组， 包括： 背框、 设于背框内的背光源、 设于背框内 的反射片、 设于反射片上的导光板、 及设于背框上的胶框， 所述胶框上设 有凸起部， 所述背框上对应该凸起部设有卡合槽， 该凸起部与该卡合槽过 盈配合， 通过凸起部与卡合槽之间的过盈配合连接将胶框固定连接于背框 上。
2、 如权利要求 1 所述的背光模组， 其中， 所述凸起部的截面呈梯 形。
3、 如权利要求 1 所述的背光模组， 其中， 所述卡合槽的形状对应所 述凸起部的形状设置且卡合槽的大小小于凸起部的大小。
4、 如权利要求 1 所述的背光模组， 其中， 所述背框包括底板和第一 侧板。
5、 如权利要求 4 所述的背光模组， 其中， 所述卡合槽设于所述第一 侧板上。
6、 如权利要求 1 所述的背光模组， 其中， 所述胶框包括顶板和第二 侧板。
7、 如权利要求 6 所述的背光模组， 其中， 所述凸起部设于所述第二 侧板自由端的端面上。
8、 如权利要求 1 所述的背光模组， 还包括设于反射片下的散热片、 设于导光板上的扩散片及设于扩散片上的棱镜片。
9、 如权利要求 1所述的背光模组， 其中， 所述背光源为线性光源。
10、 一种背光模组， 包括： 背框、 设于背框内的背光源、 设于背框内 的反射片、 设于反射片上的导光板、 及设于背框上的胶框， 所述胶框上设 有凸起部， 所述背框上对应该凸起部设有卡合槽， 该凸起部与该卡合槽过 盈配合， 通过凸起部与卡合槽之间的过盈配合连接将胶框固定连接于背框 上；
其中， 所述凸起部的截面呈梯形；
其中， 所述卡合槽的形状对应所述凸起部的形状设置且卡合槽的大小 小于凸起部的大小；
其中， 所述背框包括底板和第一侧板；
其中， 所述卡合槽设于所述第一侧板上；
其中， 所述胶框包括顶板和第二侧板； 其中， 所述凸起部设于所述第二侧板自由端的端面上； 还包括设于反射片下的散热片、 设于导光板上的扩散片及设于扩散片 上的棱镜片；
其中， 所述背光源为线性光源。
PCT/CN2012/083526 2012-10-12 2012-10-26 背光模组 Ceased WO2014056264A1 (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US13/704,004 US9004739B2 (en) 2012-10-12 2012-10-26 Backlight module

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Application Number Priority Date Filing Date Title
CN2012103872845A CN102865522A (zh) 2012-10-12 2012-10-12 背光模组
CN201210387284.5 2012-10-12

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WO2014056264A1 true WO2014056264A1 (zh) 2014-04-17

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