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WO2014000369A1 - 背光模块以及液晶显示器 - Google Patents

背光模块以及液晶显示器 Download PDF

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Publication number
WO2014000369A1
WO2014000369A1 PCT/CN2012/084739 CN2012084739W WO2014000369A1 WO 2014000369 A1 WO2014000369 A1 WO 2014000369A1 CN 2012084739 W CN2012084739 W CN 2012084739W WO 2014000369 A1 WO2014000369 A1 WO 2014000369A1
Authority
WO
WIPO (PCT)
Prior art keywords
unit
notch
lateral
back plate
backplane
Prior art date
Application number
PCT/CN2012/084739
Other languages
English (en)
French (fr)
Inventor
周革革
李德华
Original Assignee
深圳市华星光电技术有限公司
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.)
Filing date
Publication date
Application filed by 深圳市华星光电技术有限公司 filed Critical 深圳市华星光电技术有限公司
Priority to US13/812,071 priority Critical patent/US9052429B2/en
Publication of WO2014000369A1 publication Critical patent/WO2014000369A1/zh

Links

Classifications

    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011Light 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
    • G02B6/0081Mechanical 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
    • G02B6/0086Positioning aspects
    • G02B6/0088Positioning aspects of the light guide or other optical sheets in the package
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011Light 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
    • G02B6/0081Mechanical 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
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/133308Support structures for LCD panels, e.g. frames or bezels
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/133308Support structures for LCD panels, e.g. frames or bezels
    • G02F1/133314Back frames
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336Illuminating devices
    • G02F1/133615Edge-illuminating devices, i.e. illuminating from the side
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F2201/00Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/46Fixing elements

Definitions

  • the present invention relates to a backlight module and a liquid crystal display, and more particularly to a backlight module and a liquid crystal display in which the back plate structure can be extended as the light guide plate expands.
  • the use of a side-lit backlight module is preferred.
  • the number of light source modules and the driving power are bound to increase, so that the total power of the light source module rises, and more heat energy is generated. Since the side-lighting type backlight module is disposed on the side of the backing plate, the heat energy is excessively concentrated, and the components in the backlight module are thermally expanded to be pressed against each other, thereby damaging the components.
  • FIG. 1 is a schematic view of the current backlight module 1
  • FIG. 2 is a cross-sectional view of the current backlight module 1 along the A-A cut line. Please refer to FIG. 1 and FIG. 2 at the same time.
  • the backlight module 1 includes: a backplane unit 11, two light source units 12, two positioning heat dissipation units 13, a reflection unit 14, a light guiding unit 15, and an optical film unit 16.
  • the two light source units 12 are respectively disposed on the side walls of the two positioning heat dissipating units 13, each of the positioning heat dissipating units 13 is disposed on the side of the back panel unit 11, and the reflecting unit 14 is disposed above the two positioning heat dissipating units 13, the light guiding unit 15 is disposed between the reflection unit 14 and the optical film unit 16.
  • Each of the light source units 12 has a light emitting surface 121, and the light guiding unit 15 includes a light incident surface 151.
  • the number of light incident surfaces 151 is the same as that of the light source unit 12, such as each light emitting surface 121 and a corresponding light incident surface 151. Between the two, the light-receiving surface 151 of the light-guiding unit 15 can be set to the same level as the light-emitting surface 121 of the light source unit 12.
  • FIG. 3 is a schematic view of the current backlight module 1 after being thermally deformed.
  • each unit is heated and expanded. Since the coefficient of thermal expansion of each unit is different, and the coefficient of thermal expansion of the light guiding unit 15 is greater than the coefficient of thermal expansion of the backing unit 11, the thermal expansion width of the light guiding unit 15 will be larger than the thermal expansion width of the backing unit 11.
  • the light guiding unit 15 is heated and expanded, the light source unit 12 will be crushed by the light guiding unit 15 to be damaged, and the light guiding unit 15 will be warped and deformed, so that the illumination uniformity of the backlight module 1 is lowered.
  • An object of the present invention is to overcome the problem that a light guide unit can squeeze a light source unit after the thermal expansion of the existing light guide unit is thermally expanded, resulting in damage of the light source unit. Therefore, the present invention provides a backlight module in which the back plate structure can be extended as the light guiding unit expands, so that the light source unit is not squeezed by the light guiding unit.
  • a secondary object of the present invention is to overcome the problem that the light guiding unit will squeeze the light source unit after the thermal expansion of the existing light guiding unit is heated, resulting in damage of the light source unit. Therefore, the present invention provides a liquid crystal display in which the back plate structure of the backlight module can be extended as the light guiding unit expands, so that the light source unit is not squeezed by the light guiding unit.
  • the present invention provides a backlight module, which comprises: a backboard assembly and a light guiding unit.
  • the backplane assembly includes a first backplane unit and a second backplane unit.
  • the first backplane unit includes: a first backplane body and a plurality of first lateral convex teeth.
  • the periphery of the first backplane body sequentially includes three first backboard sides and a first gap.
  • a plurality of first lateral convex teeth are formed on the first notch.
  • the second backplane unit includes: a second backplane body and a plurality of first lateral groove portions.
  • the periphery of the second backplane body sequentially includes three second backplane sides and a second gap.
  • a plurality of first lateral groove portions are formed on the second notch, and the plurality of first lateral groove portions correspond to the number and positions of the plurality of first lateral convex tooth portions, and the plurality of first lateral grooves are The portion is interlocked with a plurality of first lateral convex teeth portions to form a complete back plate assembly.
  • the first backplane unit further includes: a plurality of second lateral convex teeth portions.
  • a plurality of second lateral convex teeth are formed on the first notch and are engaged with the second back plate body.
  • the first backplane unit further includes: a plurality of third lateral groove portions formed on the first notch; the second back plate unit further includes a plurality of first lateral concave teeth portions formed on In the second notch, the third lateral groove portion corresponds to the number and position of the first lateral concave tooth portion, and the third lateral groove portion is engaged with the first lateral concave tooth portion.
  • the width of the first notch is slightly larger than the width of the second notch.
  • the first backing plate unit and the second backing plate unit are separated by the amount of expansion of the light guiding unit.
  • the invention provides a liquid crystal display comprising: a liquid crystal module and a backlight module.
  • the backlight module comprises: a backboard assembly and a light guiding unit.
  • the backplane assembly includes a first backplane unit and a second backplane unit.
  • the first backplane unit includes: a first backplane body and a plurality of first lateral convex teeth.
  • the periphery of the first backplane body sequentially includes three first backplane sides and a first gap.
  • a plurality of first lateral convex teeth are formed on the first notch.
  • the second backplane unit includes: a second backplane body and a plurality of first lateral groove portions.
  • Second back plate body The periphery includes three second back plate sides and a second gap.
  • a plurality of first lateral groove portions are formed on the second notch, and the plurality of first lateral groove portions correspond to the number and positions of the plurality of first lateral convex tooth portions, and the plurality of first lateral grooves are The portion is interlocked with a plurality of first lateral convex teeth portions to form a complete back plate assembly.
  • the first backplane unit further includes: a plurality of second lateral convex tooth portions, wherein the plurality of second lateral convex tooth portions are formed on the first notch and are engaged with the second back plate body.
  • the first backplane unit further includes: a plurality of third lateral groove portions formed on the first notch; the second back plate unit further includes a plurality of first lateral concave teeth portions formed on In the second notch, the third lateral groove portion corresponds to the number and position of the first lateral concave tooth portion, and the third lateral groove portion is engaged with the first lateral concave tooth portion.
  • the width of the first notch is slightly larger than the width of the second notch.
  • the first backing unit and the second backing unit are separated by the amount of expansion of the light guiding unit.
  • the backlight module and the liquid crystal display of the present invention have the effect of designing the backplane assembly into a separable first backplane unit and a second backplane unit, with different joint structures, and the backplane assembly. It can be extended as the light guiding unit expands, thereby solving the problem that the light guiding unit is squeezed by the expanded light guiding unit and damaged.
  • FIG. 1 is a schematic view of a current backlight module
  • Figure 3 is a cross-sectional view of the current backlight module along the A-A cut line after being thermally deformed
  • FIG. 4 is an exploded perspective view of a first embodiment of a backlight module of the present invention.
  • FIG. 5 is a partial enlarged view of a second embodiment of a backlight module of the present invention.
  • FIG. 6 is a partial enlarged view of a third embodiment of a backlight module of the present invention.
  • FIG. 7 is a schematic view of a liquid crystal display of the present invention. detailed description
  • the backlight module 2 package A backing plate assembly 20, a light source assembly 23, a reflecting unit 24, a light guiding unit 25 and an optical film unit 26 are included.
  • the light source component 23 includes a light source unit 231 and a positioning heat dissipation unit 232.
  • the reflection unit 24 is disposed above the back plate assembly 20 and below the light guiding unit 25
  • the optical film unit 26 is disposed above the light guiding unit 25 .
  • the reflection unit 24 includes a reflection sheet 241 and a plurality of reflection sheet positioning portions 242.
  • the light guiding unit 25 includes a light guide plate 251, a plurality of light guide plate positioning portions 252 and a light incident surface 253.
  • the optical film unit 26 includes an optical film 261 and a plurality of optical film positioning portions 262.
  • the light source unit 231 has a light emitting surface 2311 corresponding to the light incident surface 253.
  • the optical film unit 26 includes: a plurality of diffusion sheets and a plurality of prism sheets, the diffusion sheet can homogenize the light refracted from the light guiding unit 25, and the prism sheet can concentrate the high-angle light on both sides to the vertical direction. .
  • the backplane assembly 20 includes a first backplane unit 21 and a second backplane unit 22.
  • the first backplane unit 21 includes: a first backplane body 211, a plurality of first backplane positioning posts 212, three first backplane side edges 213, a first notch 2131, and a plurality of first lateral convex teeth. Part 214.
  • a plurality of first backplane positioning posts 212 are embedded in the first backplane body 211, and each of the first backplane positioning posts 212 is disposed in a corresponding one of the reflective sheet positioning portions 242 and one of the light guide plate positioning portions. 252 and one of the optical film positioning portions 262 for fixing the reflecting unit 24, the light guiding unit 25 and the optical film unit 26 to the backing plate assembly 20.
  • the first backing plate side 213 is formed on three sides of the first backing plate body 211.
  • the first notch 2131 is formed on the other side of the first backboard body 211.
  • a plurality of first lateral convex teeth portions 214 are formed on the first notch 2131.
  • the second backplane unit 22 includes: a second backplane body 221, a plurality of second backplane positioning posts 222, a second backplane side 223, a second notch 2231, and a plurality of first lateral recesses 224.
  • Each of the second backplane positioning posts 222 is embedded in the second backplane body 221, and each of the second backplane positioning posts 222 is disposed at a corresponding one of the reflective sheet positioning portions 242 and one of the light guide plate positioning portions. 252 and one of the optical film positioning portions 262 for fixing the reflecting unit 24, the light guiding unit 25 and the optical film unit 26 to the backing plate assembly 20.
  • the second backing plate side 223 is formed on three sides of the second backing plate body 221 .
  • the second notch 2231 is formed on the other side of the second back plate body 221.
  • a plurality of first lateral groove portions 224 are formed on the second notch 2231, and the number and position of the plurality of first lateral groove portions 224 and the plurality of first lateral convex tooth portions 214 correspond to a plurality of When the one side groove portion 224 and the plurality of first side protruding tooth portions 214 are engaged with each other, the first back plate unit 21 will be engaged with the second back plate unit 22 to form a complete back plate assembly 20.
  • the backlight module 2 can further have two light source components 23, and the two light source components 23 are respectively disposed on the first backplane side 213 of the first backboard unit 21 and the second backplane of the second backplane unit 22. Side 223.
  • Each of the light source assemblies 23 has a positioning heat dissipating unit 232 that can position the light incident surface 253 of the light guiding unit 25 to the same level as the light emitting surface 2311.
  • FIG. 5 is a partial enlarged view of a second embodiment of the backlight module 2 of the present invention.
  • the first backplane unit 21 of the backlight module 2 further includes: a plurality of second lateral groove portions 215 and a plurality of second lateral convex teeth portions 216.
  • the distance between the second lateral convex tooth portion 216 and the first notch 2131 is greater than the distance between the first lateral convex tooth portion 214 and the first notch 2131.
  • Fig. 6 is a partially enlarged view showing a third embodiment of the backlight module 2 of the present invention.
  • the first backplane unit 21 of the backlight module 2 further includes a plurality of third lateral groove portions 217 formed on the first notch 2131.
  • the second back plate unit 22 further includes a plurality of first lateral concave tooth portions 225 formed on the second notch 2231, and the third lateral groove portion 217 corresponds to the number and position of the first lateral concave tooth portions 225.
  • the third lateral groove portion 217 will be engaged with the first lateral concave tooth portions 225.
  • the width of the first notch 2131 is slightly larger than the width of the second notch 2231.
  • the first notch 2131 is disposed on the outer edge of the second cutout 2231, so that the first backplane unit 21 and the second backplane unit 22 can be laterally Sliding.
  • the heat energy generated by the light source unit 23 causes the light guiding unit 25, the reflecting unit 24, and the optical film unit 26 to be thermally expanded.
  • the plurality of light guide plate positioning portions 252 are caused to move in a horizontal direction, and the plurality of first back plate positioning posts 212 and the plurality of second back plate positioning posts 222 are pushed, and further The first backboard unit 21 and the second backboard unit 22 are separated by the amount of expansion of the light guiding unit 25.
  • FIG. 7 is a schematic view of a liquid crystal display 4 of the present invention.
  • the liquid crystal display 4 includes a liquid crystal module 3 and a backlight module 2.
  • the liquid crystal module 3 is mounted on the backlight module 2, wherein the backlight module 2 can be the structure of the above embodiments, and therefore will not be described again.
  • the backlight module 2 and the liquid crystal display 4 of the present invention are effective in that the backplane assembly 20 is designed as a detachable first backplane unit 21 and a second backplane unit 22, with different joint structures.
  • the backing plate assembly 20 can be extended with the expansion of the light guiding unit 251, thereby solving the problem that the light source unit 231 is crushed by the expanded light guiding unit 25 to be damaged.

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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)
  • Liquid Crystal (AREA)

Abstract

提供了一种背光模块(2)及液晶显示器(4),背光模块(2)包括:一背板组件(20)与一导光单元(25)。背板组件(20)包括一第一背板单元(21)与一第二背板单元(22)。第一背板单元(21)包括:一第一背板本体(211)与多数个第一侧向凸齿部(214)。第一背板本体(211)的周边有一第一缺口(2131)。多数个第一侧向凸齿部(214)形成于第一缺口(2131)上。第二背板单元(22)包括:一第二背板本体(22)与多数个第一侧向凹槽部(224)。第二背板本体(221)的周边有一第二缺口(2231)。多数个第一侧向凹槽部(224)形成于第二缺口(2231)上。多数个第一侧向凸齿部(214)将与多数个第一侧向凹槽部(224)扣合,形成完整的背板组件(20)。当导光单元(25)受热往水平方向膨胀时,会使第一背板单元(21)与第二背板单元(22)依导光单元(25)的膨胀量而分离,从而解决光源单元(231)被膨胀后的导光单元(25)挤压而受损的问题。

Description

背光模块以及液晶显示器
技术领域
本发明是有关于一种背光模块以及液晶显示器, 特别是有关于一种背板结构可随导光 板膨胀而伸展的背光模块以及液晶显示器。 背景技术
在液晶显示器的背光模块领域中, 随着液晶显示屏的尺寸不断加大, 且产品外观亦被 要求要达到薄形化, 因此使用侧向入光式的背光模块即是首选。 为了达到屏幕亮度的规 格, 势必增加光源模块的数量与驱动电力, 因此光源模块的总功率上升后, 亦会产生更多 的热能。 由于侧向入光式的背光模块是将光源模块设置在背板的侧边, 这将会导致热能过 于集中, 并导致背光模块中的组件受热膨胀而相互挤压, 因而使组件毁损。
图 1为现行背光模块 1的示意图, 图 2为现行背光模块 1沿 A-A割面线的剖面图, 请 同时参考图 1与图 2。
背光模块 1包括: 一背板单元 11、 二光源单元 12、 二定位散热单元 13、 一反射单元 14、 一导光单元 15与一光学膜单元 16。 二光源单元 12分别设置于二定位散热单元 13的 侧壁上, 每一定位散热单元 13装设于背板单元 11的侧边, 反射单元 14装设在二定位散 热单元 13上方, 导光单元 15装设在反射单元 14与光学膜单元 16之间。 其中每一光源单 元 12具有一发光表面 121, 且导光单元 15包含二入光表面 151, 入光表面 151的数量与 光源单元 12—致每一发光表面 121与一对应的入光表面 151之间,保持一光耦合距离 do 二定位散热单元 13可将导光单元 15的入光表面 151设定至与光源单元 12的发光表面 121 在相同的水平高度。
图 3为现行背光模块 1受热变形后的示意图。 如上述可知, 当二光源单元 12产生的 热能传导到反射单元 14、 导光单元 15与光学膜单元 16后, 每一单元皆会受热而膨胀。 由 于每一单元的热膨胀率皆不同, 且导光单元 15的热膨胀率大于背板单元 11的热膨胀率, 因此导光单元 15的热膨胀宽度将会大于背板单元 11的热膨胀宽度。 当导光单元 15在受 热膨胀后, 光源单元 12将会受到导光单元 15的挤压而毁损, 且导光单元 15会产生翘曲 变形, 使背光模块 1的发光均匀度下降。
由于导光单元 15的热膨胀宽度大于背板单元 11的热膨胀宽度, 导光单元 15受热膨 胀后, 会挤压光源单元 12。 因此如何避免光源单元被受热膨胀的导光单元挤压而毁损, 则 是极需解决的问题。 发明内容
本发明的目的在于, 克服现有导光单元受热膨胀后, 导光单元会挤压光源单元, 导致 光源单元毁损的问题。 因此本发明提出一种背光模块, 其背板结构可随导光单元膨胀而伸 展, 使光源单元不会受到导光单元的挤压。
本发明的次要目的在于, 克服现有导光单元受热膨胀后, 导光单元会挤压光源单元, 导致光源单元毁损的问题。 因此本发明提出一种液晶显示器, 其背光模块的背板结构可随 导光单元膨胀而伸展, 使光源单元不会受到导光单元的挤压。
为了解决上述导光单元受热膨胀所造成的问题, 本发明提出一种背光模块, 其包括: 一背板组件与一导光单元。
背板组件包括一第一背板单元与一第二背板单元。 第一背板单元包括: 一第一背板本 体以及多数个第一侧向凸齿部。 第一背板本体的周边依序包括三個第一背板侧边与一第一 缺口。 多数个第一侧向凸齿部形成于第一缺口上。
第二背板单元包括: 一第二背板本体以及多数个第一侧向凹槽部。 第二背板本体的周 边依序包括三個第二背板侧边与一第二缺口。 多数个第一侧向凹槽部形成于第二缺口上, 多数个第一侧向凹槽部与多数个第一侧向凸齿部的数量与位置相对应, 多数个第一侧向凹 槽部与多数个第一侧向凸齿部相互扣合, 形成完整的背板组件。
前述的背光模块中, 第一背板单元更包括: 多数个第二侧向凸齿部。 多数个第二侧向 凸齿部形成于第一缺口上, 与第二背板本体扣合。
前述的背光模块中, 第一背板单元更包括: 多数个第三侧向凹槽部, 形成于第一缺口 上; 第二背板单元更包括多数个第一侧向凹齿部, 形成于第二缺口上, 第三侧向凹槽部与 第一侧向凹齿部的数量与位置相对应, 第三侧向凹槽部与第一侧向凹齿部扣合。
前述的背光模块中, 第一缺口的宽度略大于第二缺口的宽度。 当第一背板单元与第二 背板单元扣合时, 第一缺口设置在第二缺口的外缘, 使第一背板单元与第二背板单元可进 行侧向的滑动。
前述的背光模块, 当导光单元受热往水平方向膨胀时, 会使第一背板单元与第二背板 单元依导光单元的膨胀量而分离。
本发明提出一种液晶显示器, 其包括: 一液晶模块与一背光模块。 背光模块包括: 一 背板组件与一导光单元。 背板组件包括一第一背板单元与一第二背板单元。 第一背板单元 包括: 一第一背板本体与多数个第一侧向凸齿部。 其中, 第一背板本体的周边依序包括三 個第一背板侧边与一第一缺口。 多数个第一侧向凸齿部形成于第一缺口处上。
第二背板单元, 包括: 一第二背板本体以及多数个第一侧向凹槽部。 第二背板本体的 周边依序包括三個第二背板侧边与一第二缺口。 多数个第一侧向凹槽部形成于第二缺口 上, 多数个第一侧向凹槽部与多数个第一侧向凸齿部的数量与位置相对应, 多数个第一侧 向凹槽部与多数个第一侧向凸齿部相互扣合, 形成完整的背板组件。
前述的液晶显示器中, 第一背板单元更包括: 多数个第二侧向凸齿部, 多数个第二侧 向凸齿部形成于第一缺口上与第二背板本体扣合。
前述的液晶显示器中, 第一背板单元更包括: 多数个第三侧向凹槽部, 形成于第一缺 口上; 第二背板单元更包括多数个第一侧向凹齿部, 形成于第二缺口上, 第三侧向凹槽部 与第一侧向凹齿部的数量与位置相对应, 第三侧向凹槽部与第一侧向凹齿部扣合。
前述的液晶显示器中, 第一缺口的宽度略大于第二缺口的宽度。 当第一背板单元与第 二背板单元扣合时, 第一缺口设置在第二缺口的外缘, 使第一背板单元与第二背板单元可 进行侧向的滑动。
前述的液晶显示器, 当导光单元受热往水平方向膨胀时, 会使第一背板单元与第二背 板单元依导光单元的膨胀量而分离。
综上所述, 本发明的背光模块以及液晶显示器效果在于, 透过将背板组件设计成可分 离的第一背板单元与一第二背板单元, 搭配不同的接合结构, 使背板组件可随导光单元膨 胀而伸展, 进而解决光源单元被膨胀后的导光单元挤压而受损的问题。
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为现行背光模块的示意图;
图 2为现行背光模块沿 A-A割面线的剖面图;
图 3为现行背光模块受热变形后, 沿 A-A割面线的剖面图;
图 4为本发明背光模块第一实施例的立体分解图;
图 5为本发明背光模块第二实施例的局部放大图;
图 6为本发明背光模块第三实施例的局部放大图; 以及
图 7为本发明液晶显示器的示意图。 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 4为本发明背光模块 2第一实施例的立体分解图。 在第一实施例中, 背光模块 2包 括: 一背板组件 20、 一光源组件 23、 一反射单元 24、 一导光单元 25与一光学膜片单元 26。 其中, 光源组件 23包括一光源单元 231与一定位散热单元 232。 反射单元 24设置于 背板组件 20的上方与导光单元 25的的下方,光学膜片单元 26设置于导光单元 25的上方。 反射单元 24包括一反射片 241与多数个反射片定位部 242。导光单元 25包括一导光板 251、 多数个导光板定位部 252与一入光表面 253。光学膜片单元 26包括一光学膜 261与多数个 光学膜定位部 262。 光源单元 231具有一发光表面 2311, 发光表面 2311与入光表面 253 相对应。
光学膜片单元 26包括: 多数个扩散片与多数个棱镜片, 扩散片可将从导光单元 25折 射出来的光予以均匀化, 棱镜片则可将两侧大角度的光, 往垂直方向集中。
背板组件 20包括一第一背板单元 21与一第二背板单元 22。 第一背板单元 21包括: 一第一背板本体 211、 多数个第一背板定位柱 212、 三個第一背板侧边 213、 一第一缺口 2131以及多数个第一侧向凸齿部 214。多数个第一背板定位柱 212嵌设于第一背板本体 211 上, 每一第一背板定位柱 212穿设于对应其位置的其中一反射片定位部 242、 其中一导光 板定位部 252与其中一光学膜定位部 262, 用以将反射单元 24、 导光单元 25与光学膜片 单元 26固定于背板组件 20上。
第一背板侧边 213成形于第一背板本体 211的三侧边。 第一缺口 2131形成于第一背 板本体 211的另一侧边。 多数个第一侧向凸齿部 214形成于第一缺口 2131上。
第二背板单元 22包括: 一第二背板本体 221、 多数个第二背板定位柱 222、 一第二背 板侧边 223、一第二缺口 2231以及多数个第一侧向凹槽部 224。多数个第二背板定位柱 222 嵌设于第二背板本体 221上, 每一第二背板定位柱 222穿设于对应其位置的其中一反射片 定位部 242、 其中一导光板定位部 252与其中一光学膜定位部 262, 用以将反射单元 24、 导光单元 25与光学膜片单元 26固定于背板组件 20上。
第二背板侧边 223成形于第二背板本体 221的三侧边。 第二缺口 2231形成于第二背 板本体 221的另一侧边。 多数个第一侧向凹槽部 224形成于第二缺口 2231上, 多数个第 一侧向凹槽部 224与多数个第一侧向凸齿部 214的数量与位置相对应, 当多数个第一侧向 凹槽部 224与多数个第一侧向凸齿部 214相互扣合时, 第一背板单元 21将与第二背板单 元 22扣合而形成完整的背板组件 20。
在本实施例中, 背光模块 2更可具有二光源组件 23, 二光源组件 23分别设置在第一 背板单元 21的第一背板侧边 213以及第二背板单元 22的第二背板侧边 223。 其中每一光 源组件 23具有一定位散热单元 232, 定位散热单元 232可将导光单元 25的入光表面 253 定位至与发光表面 2311同一水平高度的位置。 图 5为本发明背光模块 2第二实施例的局部放大图。 在第二实施例中, 背光模块 2的 第一背板单元 21更包括: 多数个第二侧向凹槽部 215与多数个第二侧向凸齿部 216。其中 第二侧向凸齿部 216至第一缺口 2131的距离大于第一侧向凸齿部 214至第一缺口 2131的 距离。 当多数个第一侧向凹槽部 224与多数个第一侧向凸齿部 214相互扣合时, 第二侧向 凸齿部 216将与第二缺口 2231处的第二背板本体 221扣合。 第二侧向凹槽部 215形成于 第二侧向凸齿部 216与第一缺口 2131之间, 且第二侧向凹槽部 215的数量与第二侧向凸 齿部 216—致。
图 6为本发明背光模块 2第三实施例的局部放大图。 在第三实施例中, 背光模块 2的 第一背板单元 21更包括多数个第三侧向凹槽部 217, 形成于第一缺口 2131上。 第二背板 单元 22更包括多数个第一侧向凹齿部 225,形成于第二缺口 2231上,第三侧向凹槽部 217 与第一侧向凹齿部 225的数量与位置相对应, 当多数个第一侧向凹槽部 224与多数个第一 侧向凸齿部 214相互扣合时, 第三侧向凹槽部 217将与第一侧向凹齿部 225扣合。
前述的背光模块 2的各实施例中,第一缺口 2131的宽度略大于第二缺口 2231的宽度。 当第一背板单元 21与第二背板单元 22扣合时, 第一缺口 2131设置在第二缺口 2231的外 缘, 使第一背板单元 21与第二背板单元 22可进行侧向的滑动。
前述的背光模块 2中, 光源组件 23产生的热能, 会导致导光单元 25、 反射单元 24与 光学膜片单元 26受热膨胀。 当导光单元 25受热往水平方向膨胀时, 会带动多数个导光板 定位部 252产生水平方向的移动, 并推动多数个第一背板定位柱 212与多数个第二背板定 位柱 222, 进而使第一背板单元 21与第二背板单元 22依导光单元 25的膨胀量而分离。
图 7为本发明液晶显示器 4的示意图。 如图 7所示, 液晶显示器 4包括一液晶模块 3 与一背光模块 2。 液晶模块 3装设于背光模块 2上方, 其中背光模块 2可以是上述各实施 例的结构, 因此不再赘述。
由上述可知, 本发明的背光模块 2 以及液晶显示器 4效果在于, 透过将背板组件 20 设计成可分离的第一背板单元 21与一第二背板单元 22, 搭配不同的接合结构, 使背板组 件 20可随导光单元 251的膨胀而伸展, 进而解决光源单元 231被膨胀后的导光单元 25挤 压而受损的问题。
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
1.一种背光模块, 其包括一背板组件与一导光单元, 所述背板组件包括:
一第一背板单元, 包括:
一第一背板本体, 其周边依序包括三個第一背板侧边与一第一缺口;
多数个第一侧向凸齿部, 形成于所述第一缺口上;
多数个第二侧向凸齿部, 形成于所述第一缺口上, 与所述第二背板本体扣合; 以 及
多数个第三侧向凹槽部, 形成于所述第一缺口上, 所述第二背板单元更包括多数 个第一侧向凹齿部, 形成于所述第二缺口上, 所述多数个第三侧向凹槽部与所述多数 个第一侧向凹齿部的数量与位置相对应, 所述多数个第三侧向凹槽部与所述多数个第 一侧向凹齿部扣合; 以及
一第二背板单元, 包括:
一第二背板本体, 其周边依序包括三個第二背板侧边与一第二缺口; 以及 多数个第一侧向凹槽部, 形成于所述第二缺口上, 且与所述多数个第一侧向凸齿 部的数量与位置相对应, 所述多数个第一侧向凹槽部与所述多数个第一侧向凸齿部相 互扣合, 形成完整的所述背板组件,
其中, 所述第一缺口的宽度略大于所述第二缺口的宽度, 当所述第一背板单元与所述 第二背板单元扣合时, 所述第一缺口设置在所述第二缺口的外缘, 使所述第一背板单元与 所述第二背板单元可进行侧向的滑动, 当所述导光单元受热往水平方向膨胀时, 会使所述 第一背板单元与所述第二背板单元依所述导光单元的膨胀量而分离。
2.一种背光模块, 其包括一背板组件与一导光单元, 所述背板组件包括:
一第一背板单元, 包括:
一第一背板本体, 其周边依序包括三個第一背板侧边与一第一缺口; 以及 多数个第一侧向凸齿部, 形成于所述第一缺口上; 以及
一第二背板单元, 包括:
一第二背板本体, 其周边依序包括三個第二背板侧边与一第二缺口; 以及 多数个第一侧向凹槽部, 形成于所述第二缺口上, 且与所述多数个第一侧向凸齿 部的数量与位置相对应, 所述多数个第一侧向凹槽部与所述多数个第一侧向凸齿部相 互扣合, 形成完整的所述背板组件。
3.如权利要求 2所述的背光模块, 其中, 所述第一背板单元更包括:
多数个第二侧向凸齿部, 形成于所述第一缺口上, 与所述第二背板本体扣合。
4.如权利要求 2所述的背光模块, 其中, 所述第一背板单元更包括多数个第三侧向凹 槽部, 形成于所述第一缺口上, 所述第二背板单元更包括多数个第一侧向凹齿部, 形成于 所述第二缺口上, 所述多数个第三侧向凹槽部与所述多数个第一侧向凹齿部的数量与位置 相对应, 所述多数个第三侧向凹槽部与所述多数个第一侧向凹齿部扣合。
5.如权利要求 2所述的背光模块, 其中, 所述第一缺口的宽度略大于所述第二缺口的 宽度, 当所述第一背板单元与所述第二背板单元扣合时, 所述第一缺口设置在所述第二缺 口的外缘, 使所述第一背板单元与所述第二背板单元可进行侧向的滑动。
6.如权利要求 2所述的背光模块, 其中, 当所述导光单元受热往水平方向膨胀时, 会 使所述第一背板单元与所述第二背板单元依所述导光单元的膨胀量而分离。
7.—种液晶显示器, 包括一液晶模块与一背光模块, 所述背光模块包括: 一背板组件 与一导光单元, 所述背板组件包括:
一第一背板单元, 包括:
一第一背板本体, 其周边依序包括三個第一背板侧边与一第一缺口; 以及 多数个第一侧向凸齿部, 形成于所述第一缺口上; 以及
一第二背板单元, 包括:
一第二背板本体, 其周边依序包括三個第二背板侧边与一第二缺口; 以及 多数个第一侧向凹槽部, 形成于所述第二缺口上, 且与所述多数个第一侧向凸齿 部的数量与位置相对应, 所述多数个第一侧向凹槽部与所述多数个第一侧向凸齿部相 互扣合, 形成完整的所述背板组件。
8.如权利要求 7所述的液晶显示器, 其中, 所述第一背板单元更包括:
多数个第二侧向凸齿部, 形成于所述第一缺口上, 与所述第二背板本体扣合。
9.如权利要求 7所述的液晶显示器, 其中, 所述第一背板单元更包括多数个第三侧向 凹槽部, 形成于所述第一缺口上, 所述第二背板单元更包括多数个第一侧向凹齿部, 形成 于所述第二缺口上, 所述多数个第三侧向凹槽部与所述多数个第一侧向凹齿部的数量与位 置相对应, 所述多数个第三侧向凹槽部与所述多数个第一侧向凹齿部扣合。
10.如权利要求 7所述的液晶显示器, 其中, 所述第一缺口的宽度略大于所述第二缺 口的宽度, 当所述第一背板单元与所述第二背板单元扣合时, 所述第一缺口设置在所述第 二缺口的外缘, 使所述第一背板单元与所述第二背板单元可进行侧向的滑动。
11.如权利要求 7所述的液晶显示器, 其中, 当所述导光单元受热往水平方向膨胀时, 会使所述第一背板单元与所述第二背板单元依所述导光单元的膨胀量而分离。
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