WO2014169529A1 - 背光模组及液晶显示器 - Google Patents

背光模组及液晶显示器 Download PDF

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Publication number
WO2014169529A1
WO2014169529A1 PCT/CN2013/078181 CN2013078181W WO2014169529A1 WO 2014169529 A1 WO2014169529 A1 WO 2014169529A1 CN 2013078181 W CN2013078181 W CN 2013078181W WO 2014169529 A1 WO2014169529 A1 WO 2014169529A1
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WO
WIPO (PCT)
Prior art keywords
backlight module
light source
disposed
light
guide plate
Prior art date
Application number
PCT/CN2013/078181
Other languages
English (en)
French (fr)
Inventor
李全
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 US13/980,044 priority Critical patent/US9297949B2/en
Publication of WO2014169529A1 publication Critical patent/WO2014169529A1/zh

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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
    • G02B6/0086—Positioning aspects
    • G02B6/0091—Positioning aspects of the light source relative to the light guide
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133603—Direct backlight with LEDs
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G02F1/133314—Back frames
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses

Definitions

  • a liquid crystal display generally includes a liquid crystal display panel and a backlight module disposed opposite to the liquid crystal display panel.
  • the liquid crystal display panel itself does not emit light, and the backlight module is required to provide a light source for displaying images.
  • a light emitting diode (LED) is applied to a backlight module as a typical point source.
  • a plurality of LEDs are used as a point source array disposed on a surface of a light source circuit board (typically a printed circuit board (PCB)) to form a Light Bar.
  • a plurality of LEDs emit a line light source under the driving of the light source circuit board, and then change the light outgoing direction through the light guide plate of the backlight module to obtain a uniform surface light source.
  • a light-coupled distance is left between the light-emitting surface of the plurality of LEDs and the light guide plate, and the light-coupled distance is used to ensure the display quality of the liquid crystal display and the utilization of light emitted by the plurality of LEDs.
  • the coupling distance is likely to be zero, that is, the light guide plate is in contact with the plurality of LEDs. After the light guide plate is in contact with a plurality of LEDs, light leakage is likely to occur.
  • the present invention provides a backlight module, including a light guide plate, a back plate, and a light source, wherein the light guide plate is disposed on the back plate, and the light source is adjacent to the The light-emitting surface of the light guide plate is disposed, the backlight module further includes at least one limiting member, the limiting member is fixedly connected to the back plate, and the limiting member abuts the light source to define the light source and the The spacing of the smooth surface
  • the limiting member includes a connecting portion and an abutting portion disposed on the connecting portion, the connecting portion is disposed between the light guide plate and the back plate, and the connecting portion is fixedly connected to the back plate And supporting the light guide plate, and the connecting portion abuts the light source to make the abutting portion be adjacent to the light source.
  • the backlight module further includes a heat dissipating member disposed between the connecting portion and the back plate, the heat dissipating member includes a groove, a groove table and a groove edge, and the connecting portion includes the connecting portion a back portion, a carrier portion extending from a side of the back portion, and a slanting portion connected between the back portion and the carrier portion, wherein
  • the connecting back is disposed in the groove, and the fixing member passes the connecting back, the groove and the through hole through the connecting back, the groove and the back plate
  • the backing plate is fixed, the carrying portion is disposed on the slot to support the light guide plate, and the bearing portion abuts the light source, and the oblique portion is disposed along the side of the slot.
  • the fixing element may be a screw, and the through hole may be a threaded hole.
  • the light source includes a plurality of point light sources and a light source circuit board electrically connected to the plurality of point light sources
  • the abutting portion includes a supporting portion and at least one protruding portion connecting the supporting portions
  • the heat sink further includes a side a wall, wherein the light source circuit board is fixed on the side wall, and the support portion is disposed on the carrying portion to limit movement of a reflective sheet disposed between the light guide plate and the carrying portion, the protruding The portion is adjacent to and between the plurality of point light sources, and the size of the protrusion in the coupling light distance direction is larger than the size of the point source in the coupling light distance direction.
  • a thermal conductive paste or a thermal conductive paste may be disposed between the light source circuit board and the sidewall.
  • the limiting member can be integrally formed.
  • the material of the limiting member may be metal.
  • the backlight module and the liquid crystal display of the present invention effectively define the coupling distance between the light source and the light incident surface of the light guide plate by the set limiting member abutting the light source, thereby avoiding thermal expansion and moisture absorption expansion of the light guide plate and The phenomenon that the coupling distance is zero is caused by the problem of positioning accuracy, and the phenomenon of light leakage of the backlight module is avoided.
  • the limiting member is convenient to manufacture and can be shared as a standard component in liquid crystal displays of different sizes, thereby reducing development cost.
  • FIG. 1 is a schematic view showing the structure of a stopper according to an embodiment of the present invention.
  • FIG. 2 is a partial perspective view of a limiting member applied to a backlight module according to an embodiment of the invention.
  • FIG. 3 illustrates a partial cutaway view of a backlight module in accordance with an embodiment of the present invention.
  • FIG. 4 shows a schematic diagram of a liquid crystal display according to an embodiment of the present invention.
  • FIG. 1 shows a schematic structural view of a stopper according to an embodiment of the present invention.
  • FIG. 2 is a partial perspective view of a limiting member applied to a backlight module according to an embodiment of the invention.
  • FIG. 3 illustrates a partial cutaway view of a backlight module in accordance with an embodiment of the present invention.
  • a backlight module 10 according to an embodiment of the invention includes a light guide plate 100 , a back plate 200 , a light source 300 , and a limiting member 400 .
  • the light guide plate 100 is disposed on the back plate 200, and the light guide plate 100 includes a light incident surface 110.
  • the light source 300 is disposed adjacent to the light incident surface 110.
  • the limiting member 400 is fixedly connected to the back plate 200 and abuts the light source 300. The distance between the light source 300 and the light incident surface 110 is defined.
  • the number of the limiting members 400 is not limited to that shown in FIG. 2, and two or more limiting members 400 may be disposed according to actual needs.
  • the limiting member 400 includes a connecting portion 410 and an abutting portion 420 disposed on the connecting portion 410.
  • the connecting portion 410 is disposed between the light guide plate 100 and the back plate 200, and the connecting portion 410 is fixedly connected to the back portion.
  • the board 200 carries the light guide plate 100, and the connecting portion 410 abuts the light source 300 such that the abutting portion 420 is adjacent to the light source 300.
  • the light source 300 includes a plurality of point light sources 310 (eg, a plurality of light emitting diodes) and a light source circuit board 320 (eg, a printed circuit board) electrically connected to the plurality of point light sources 310.
  • the abutting portion 420 includes a support portion 421 and a connection support portion. The two protrusions 422 of the 421 are respectively adjacent to and between the plurality of point light sources 310.
  • the light incident surface 110 of the light guide plate 100 approaches the light source 300, and the coupling distance is reduced.
  • the limiting member 400 is disposed at Between the light source 300 and the light incident surface 110, the two protrusions 422 of the abutting portion 420 block the approach of the light incident surface 110 to the light source 300 to ensure an appropriate coupling distance.
  • the size of the protruding portion 422 in the coupling light distance direction is larger than the size of the point light source 310 in the coupling light distance direction.
  • the connecting portion 410 includes a connecting back portion 411, a carrying portion 412 extending from one side of the connecting back portion 411, and a connecting portion 413 connected between the connecting back portion 411 and the carrying portion 412. It should be understood that the plane and the carrying portion where the back portion 411 is located The plane where 412 is located is not the same plane.
  • the carrying portion 412 is used to carry the light guide plate 100, and the back portion 411 is fixedly coupled to the back plate 200. The manner in which the back portion 411 and the back plate 200 are fixed and the function of the oblique portion 413 will be hereinafter described.
  • the backlight module 10 in order to make the backlight module 10 have better heat dissipation, the backlight module 10 further includes a heat sink 500 disposed between the connecting portion 410 and the back plate 200, wherein the heat dissipation is performed.
  • the member includes a groove 510, a groove table 520, 530, and a groove edge 540.
  • the height of the groove table 530 is slightly higher than the height of the groove table 520, and the action of the groove table 520 and the groove table 530 will be described below.
  • the back portion 411 is placed in the recess 510, and the screw 610 is locked and fixed by the connecting back 411, the groove 510, and the threaded hole 620 provided in the back plate 200 to connect the back portion 411, the groove 510 and the back plate 200.
  • the carrying portion 412 is disposed on the slot 520 to carry the reflective sheet 700 and the light guide plate 100, and the carrying portion 412 directly abuts the light source circuit board 320 such that the two protruding portions 422 are adjacent to and adjacent to the plurality of point light sources 310.
  • the groove table 530 directly contacts and carries the reflection sheet 700 and the light guide plate 100.
  • the sum of the height of the groove table 520 and the thickness of the bearing portion 412 is equal to the height of the groove table 530, so that the reflection sheet 700 and the light guide plate 100 can be horizontal. .
  • the oblique portion 413 is placed in cooperation with the groove edge 540.
  • the screw 610 can also be replaced by other fixing members such as rivets, and the threaded hole 620 can also be a through hole.
  • an adhesive may be provided between the back portion 411 and the groove 510, and between the groove 510 and the back sheet 200, and the back portion 411, the groove 510, and the back sheet 200 may be bonded and fixed.
  • the heat sink 500 may further include a sidewall 550, such that the light source circuit board 320 may be fixed on the sidewall 550, when the light source circuit board 320 drives the plurality of point light sources 310 to emit light.
  • the generated heat can be conducted to the backing plate 200 through the heat sink 500 and radiated to the surrounding environment by the backing plate 200, thereby effectively improving heat dissipation of the plurality of point light sources 310 and the light source circuit board 320.
  • the heat sink 500 may not include the sidewall 550.
  • a light source bracket may be disposed at a position where the light source 300 is placed in the backlight module 10. The light source bracket is used to support the light source 300, and the light source bracket can be fixed by the prior art.
  • the light source circuit board 320 and the side wall 550 can be adhered and fixed between the light source circuit board 320 and the side wall 550 by heat conduction paste or thermal conductive paste 800, and the heat generated by the plurality of point light sources 310 and the light source circuit board 320 can be generated. Better to dissipate.
  • the light source circuit board 320 can also pass screws, etc.
  • the fixing member is fixedly connected to the side wall 550, and the invention is not limited thereto. It should be noted that, in the embodiment of the present invention, the limiting member 400 can be integrally molded by casting by a mold.
  • the limiting member 400 can also be connected by using various components in an existing fixed connection manner, and the invention is not limited thereto.
  • the material of the limiting member 400 may be a metal material, such as an electrogalvanized steel sheet ( SECC), hot dip galvanized steel sheet (SGCC) or AL5052 aluminum alloy.
  • SECC electrogalvanized steel sheet
  • SGCC hot dip galvanized steel sheet
  • AL5052 aluminum alloy aluminum alloy
  • the material of the limiting member 400 may also be white or transparent polycarbonate (polycarbonate, PC for short) or plastic such as polymethyl methacrylate (PMMA). Material.
  • the liquid crystal display 1 according to the embodiment of the present invention includes the backlight module 10 and a liquid crystal display panel 20 disposed opposite the backlight module 10.
  • the backlight module 10 provides a display light source to the liquid crystal display panel. 20, so that the liquid crystal display panel 20 displays an image.
  • the backlight module 10 of the embodiment of the present invention abuts the light source 300 through the disposed limiting member 400, effectively defining the coupling distance between the light source 300 and the light incident surface 110 of the light guide plate 100, thereby avoiding The phenomenon that the coupling distance is zero due to the thermal expansion, the hygroscopic expansion of the light guide plate 100 and the positioning accuracy of the light guide plate 100, and the phenomenon that the backlight module 10 leaks light is avoided.
  • the limiting member 400 of the embodiment of the present invention is convenient to manufacture, and can be shared as a standard component in liquid crystal displays of different sizes, thereby reducing development cost.

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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)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Liquid Crystal (AREA)

Abstract

一种背光模组（10）包括导光板（100）、背板（200）、光源（300）以及至少一个限位件（400）。导光板（100）设于背板（200）之上，光源（300）邻近于导光板（100）的入光面（110）设置，限位件（400）固定连接于背板（200），并且限位件（400）抵接所述光源（300）以限定光源（300）与导光板（100）的入光面（110）的间隔距离。还披露了一种包含所述背光模组（10）的液晶显示器（1）。通过设置的限位件（400）抵接光源（300）而有效地限定了光源（300）与导光板（100）的入光面（110）之间的耦光距离，避免了由于导光板（100）的热膨胀、吸湿膨胀以及本身定位精度的问题而出现的耦光距离为0的现象以及避免了背光模组（10）漏光的现象。

Description

说 明 书
背光模组及液晶显示器 技术领域
本发明涉及液晶显示领域。更具体地讲，涉及一种背光模组及液晶显示器。 背景技术 液晶显示器通常包括液晶显示面板以及与液晶显示面板相对设置的背光 模组， 液晶显示面板本身不发光， 需要背光模组向其提供显示影像的光源。发 光二极管（LED)作为典型的点光源而应用于背光模组。通常是采用多个 LED 作为点光源阵列设置于光源电路板 （通常为印刷电路板 （PCB ) ) 表面组成发 光二极管灯条 （Light Bar)。 多个 LED在光源电路板的驱动下发出线光源， 而 后通过背光模组的导光板（Light Guide Plate)改变光的出射方向， 得到均匀的 面光源。
多个 LED的发光面与导光板之间留有耦光距离， 该耦光距离是保证液晶显示 器的显示品质和多个 LED发出光的利用率。 在实际工作中， 由于导光板的热 膨胀、 吸湿膨胀以及本身定位精度的问题， 容易出现耦光距离为 0， 即导光板 与多个 LED接触。 在导光板与多个 LED接触后， 容易出现漏光现象。 发明内容 为了解决上述现有技术存在的问题， 本发明提供了一种背光模组， 包括导 光板、 背板和光源， 所述导光板设于所述背板之上， 所述光源邻近于所述导光 板的入光面设置， 所述背光模组还包括至少一个限位件， 所述限位件固定连接 背板， 并且所述限位件抵接所述光源以限定所述光源与所述入光面的间隔距
此外， 所述限位件包括连接部以及设于连接部上的抵接部， 所述连接部设 于所述导光板与所述背板之间， 所述连接部固定连接于所述背板并承载所述导 光板， 并且所述连接部抵接于所述光源以使所述抵接部邻近于所述光源。 此外， 所述背光模组还包括散热件， 所述散热件设于所述连接部与所述背 板之间， 所述散热件包括凹槽、 槽台以及槽边， 所述连接部包括连背部、 由连 背部一侧延伸形成的承载部以及连接于连背部和承载部之间的斜连部， 其中， 所述连背部置于所述凹槽内， 固定元件通过所述连背部、 所述凹槽及所述背板 上各设有的通孔而将所述连背部、 所述凹槽和所述背板固定， 所述承载部设于 所述槽台之上以承载所述导光板， 并且所述承载部抵接所述光源， 所述斜连部 配合所述槽边放置。 此外， 所述固定元件可为螺钉， 所述通孔可为螺紋孔。 此外， 所述光源包括若干点光源以及与所述若干点光源电性连接的光源电 路板， 所述抵接部包括支撑部以及连接支撑部的至少一个凸出部， 所述散热件 还包括侧壁， 其中， 所述光源电路板固定于所述侧壁上， 所述支撑部设于所述 承载部上以限制导光板与所述承载部之间设置的反射片的移动， 所述凸出部邻 近并处于若干点光源之间， 并且所述凸出部在耦光距离方向的尺寸大于所述点 光源在耦光距离方向的尺寸。 此外， 所述光源电路板与所述侧壁之间可设置有导热膏或导热胶。 此外， 所述限位件可一体成型。 此外， 所述限位件的材质可为金属。 此外， 所述限位件的材质还可为塑料。 本发明的另一目的还在于提供一种液晶显示器， 包括背光模组及与背光模 组相对设置的液晶显示面板， 背光模组提供显示光源给液晶显示面板， 所述背 光模组为上述的背光模组。
本发明的背光模组及液晶显示器，通过设置的限位件抵接光源而有效地限 定了光源与导光板的入光面之间的耦光距离， 避免了由于导光板的热膨胀、吸 湿膨胀以及本身定位精度的问题而出现的耦光距离为 0的现象， 同时避免了背 光模组漏光的现象。 另外， 所述限位件制作方便， 可作为标准件在不同尺寸的 液晶显示器中进行共用， 降低了开发成本。
附图说明 图 1示出了根据本发明的实施例的限位件的结构示意图。 图 2示出了根据本发明实施例的限位件应用于背光模组的局部立体示意 图。 图 3示出了根据本发明的实施例的背光模组的局部剖切示意图。 图 4示出了根据本发明的实施例的液晶显示器的示意图。 具体实施方式 在对本发明的实施例进行详细的描述， 其示例表示在附图中， 其中， 相同 的标号始终表示相同部件。 下面通过参照附图对实施例进行描述以解释本发 明。在下面的描述中，为了避免公知结构和 /或功能的不必要的详细描述所导致 的本发明构思的混淆， 可省略公知结构和 /或功能的不必要的详细描述。 图 1示出了根据本发明的实施例的限位件的结构示意图。 图 2示出了根据 本发明实施例的限位件应用于背光模组的局部立体示意图。 图 3示出了根据本 发明的实施例的背光模组的局部剖切示意图。 参照图 1、图 2和图 3，根据本发明的实施例的背光模组 10包括导光板 100、 背板 200、 光源 300和限位件 400。 其中， 导光板 100设置于背板 200之上， 并且导光板 100包括入光面 110， 光源 300邻近于入光面 110设置， 限位件 400固定连接于背板 200并抵接于光 源 300以限定光源 300与入光面 110的间隔距离。 在本发明中， 限位件 400的 数量并不以图 2所示为限， 可根据实际需要设置两个或者更多个限位件 400。 具体而言， 限位件 400包括连接部 410以及设置于连接部 410上的抵接部 420， 其中， 连接部 410设置于导光板 100与背板 200之间， 该连接部 410固 定连接于背板 200并承载导光板 100， 并且连接部 410抵接光源 300以使抵接 部 420邻近于光源 300。 光源 300包括多个点光源 310 (例如多个发光二极管） 以及与该多个点光 源 310电性连接的光源电路板 320 (例如印刷电路板），抵接部 420包括支撑部 421以及连接支撑部 421的两个凸出部 422， 两个凸出部 422分别邻近并处于 多个点光源 310之间。 如此， 当导光板 100出现热膨胀、 吸湿膨胀或者本身定 位精度的问题时， 导光板 100的入光面 110会向光源 300靠近， 会使耦光距离 减小， 然而， 由于限位件 400设置于光源 300与入光面 110之间， 抵接部 420 的两个凸出部 422会阻挡入光面 110向光源 300的靠近以保证适当的耦光距离。 为了更加确保多个点光源 310与入光面 110之间的耦光距离， 优选地， 凸出部 422在耦光距离方向的尺寸大于点光源 310在耦光距离方向的尺寸。支撑部 421 的作用将在下文描述。 连接部 410包括连背部 411、 由连背部 411一侧延伸形成的承载部 412以 及连接于连背部 411和承载部 412之间的斜连部 413， 应该理解， 连背部 411 所在的平面与承载部 412所在的平面不为同一平面。承载部 412用于承载导光 板 100， 连背部 411固定连接于背板 200， 连背部 411与背板 200的固定方式 以及斜连部 413的作用将在下文体现。抵接部 420的支撑部 421设置于承载部 412上以限制导光板 100与承载部 412之间设置的反射片 700在水平面的左右 移动。 在本发明的实施例中， 为了使得背光模组 10具备更好的散热性， 背光模 组 10还包括散热件 500，该散热件 500设于连接部 410与背板 200之间，其中， 散热件包括凹槽 510、 槽台 520、 530以及槽边 540， 槽台 530的高度略高于槽 台 520的高度， 槽台 520和槽台 530的作用将于下文描述。 连背部 411放置于凹槽 510内， 螺丝钉 610通过连背部 411、 凹槽 510及 背板 200上设有的螺紋孔 620而将连背部 411、凹槽 510和背板 200锁附固定。 承载部 412设于槽台 520之上以承载反射片 700及导光板 100，并且承载部 412 直接抵接于光源电路板 320以使两个凸出部 422分别邻近并处于多个点光源 310之间， 槽台 530直接接触并承载反射片 700及导光板 100， 槽台 520的高 度与承载部 412的厚度之和等于槽台 530的高度，以使反射片 700和导光板 100 能够处于水平状态。 斜连部 413配合槽边 540放置。 应当理解， 螺丝钉 610也可用铆钉等其它固定元件代替， 与之相对应， 螺 紋孔 620也可为通孔。此外，也可在连背部 411与凹槽 510之间， 以及凹槽 510 与背板 200之间设置粘结剂， 而将连背部 411、凹槽 510和背板 200粘结固定。 进一歩地， 在本发明的实施例中， 散热件 500还可包括侧壁 550， 这样， 光源电路板 320可固定于该侧壁 550上，在光源电路板 320驱动多个点光源 310 发光时产生的热量可通过散热件 500传导至背板 200， 并由背板 200辐射至周 围的环境， 有效地提高多个点光源 310和光源电路板 320的散热。 当然， 散热 件 500也可不包括侧壁 550，可在背光模组 10中放置光源 300的位置设置一光 源支架， 该光源支架用于支撑光源 300， 并且该光源支架可通过现有技术的固 定方式固定于背板 200上， 本发明并不以此为限。 在光源电路板 320与侧壁 550之间可通过设置导热膏或导热胶 800， 将光 源电路板 320与侧壁 550粘附固定， 同时能够将多个点光源 310以及光源电路 板 320产生的热量更好地散发出去。 当然， 光源电路板 320也可通过螺丝钉等 固定元件与侧壁 550固定连接， 本发明并不以此为限。 需要说明的是， 在本发明的实施例中， 限位件 400可通过模具进行浇筑而 一体成型。 当然， 限位件 400也可通过各个部件以现有的固定连接方式连接而 成， 本发明并不以此为限。 此外， 在本发明的实施例中， 为了进一歩地将光源电路板 320与多个点光 源 310产生的热量传递到散热件 500， 限位件 400的材质可以是金属材料， 例 如电镀锌钢板 （SECC )、 热浸锌钢板 （SGCC ) 或 AL5052铝合金等。 当然， 本发明并不以此为限， 限位件 400的材质也可以是白色或者透明的聚碳酸酯 ( Polycarbonate， 简称 PC )， 或者聚甲基丙烯酸甲酯（ Polymethyl Methacrylate， 简称 PMMA) 等塑料材质。 图 4示出了根据本发明的实施例的液晶显示器的示意图。 如图 4所示，根据本发明的实施例的液晶显示器 1包括上述的背光模组 10 以及与该背光模组 10相对设置的液晶显示面板 20，该背光模组 10提供显示光 源给液晶显示面板 20， 以使液晶显示面板 20显示影像。 综上所述， 本发明的实施例的背光模组 10通过设置的限位件 400抵接光 源 300， 有效地限定了光源 300与导光板 100的入光面 110之间的耦光距离， 避免了由于导光板 100的热膨胀、吸湿膨胀以及本身定位精度的问题而出现的 耦光距离为 0的现象， 同时避免了背光模组 10漏光的现象。 另外， 本发明的 实施例的限位件 400制作方便， 可作为标准件在不同尺寸的液晶显示器中进行 共用， 降低了开发成本。
尽管已经参照其示例性实施例具体显示和描述了本发明， 但是本领域的技 术人员应该理解， 在不脱离权利要求所限定的本发明的精神和范围的情况下， 可以对其进行形式和细节上的各种改变。

Claims

权利要求书
1、 一种背光模组， 包括导光板、 背板和光源， 所述导光板设于所述背板 之上， 所述光源邻近于所述导光板的入光面设置， 其中， 所述背光模组还包括 至少一个限位件， 所述限位件固定连接于背板， 并且所述限位件抵接所述光源 以限定所述光源与所述入光面的间隔距离。
2、 根据权利要求 1所述的背光模组， 其中， 所述限位件包括连接部以及 设于连接部上的抵接部， 所述连接部设于所述导光板与所述背板之间， 所述连 接部固定连接于所述背板并承载所述导光板， 并且所述连接部抵接于所述光源 以使所述抵接部邻近于所述光源。
3、 根据权利要求 2所述的背光模组， 其中， 所述背光模组还包括散热件， 所述散热件设于所述连接部与所述背板之间， 所述散热件包括凹槽、 槽台以及 槽边， 所述连接部包括连背部、 由连背部一侧延伸形成的承载部以及连接于连 背部和承载部之间的斜连部， 其中， 所述连背部置于所述凹槽内， 固定元件通过所述连背部、 所述凹槽 及所述背板上各设有的通孔而将所述连背部、 所述凹槽和所述背板固定， 所述 承载部设于所述槽台之上以承载所述导光板， 并且所述承载部抵接所述光源， 所述斜连部配合所述槽边放置。
4、 根据权利要求 3所述的背光模组， 其中， 所述固定元件为螺钉， 所述 通孔为螺紋孔。
5、 根据权利要求 3所述的背光模组， 其中， 所述光源包括若干点光源以 及与所述若干点光源电性连接的光源电路板，所述抵接部包括支撑部以及连接 支撑部的至少一个凸出部， 所述散热件还包括侧壁， 其中， 所述光源电路板固定于所述侧壁上， 所述支撑部设于所述承载部上 以限制导光板与所述承载部之间设置的反射片的移动， 所述凸出部邻近并处于 若干点光源之间， 并且所述凸出部在耦光距离方向的尺寸大于所述点光源在耦 光距离方向的尺寸。
6、 根据权利要求 5所述的背光模组， 其中， 所述光源电路板与所述侧壁 之间设置有导热膏。
7、 根据权利要求 5所述的背光模组， 其中， 所述光源电路板与所述侧壁 之间设置有导热胶。
8、 根据权利要求 1所述的背光模组， 其中， 所述限位件一体成型。
9、 根据权利要求 1所述的背光模组， 其中， 所述限位件的材质为金属。
10、 根据权利要求 1所述的背光模组， 其中， 所述限位件的材质为塑料。
11、 一种液晶显示器， 包括背光模组及与背光模组相对设置的液晶显示面 板， 背光模组提供显示光源给液晶显示面板， 其中， 所述背光模组为权利要求
1所述的背光模组。
12、 根据权利要求 11所述的背光模组， 其中， 所述限位件包括连接部以 及设于连接部上的抵接部， 所述连接部设于所述导光板与所述背板之间， 所述 连接部固定连接于所述背板并承载所述导光板， 并且所述连接部抵接于所述光 源以使所述抵接部邻近于所述光源。
13、 根据权利要求 12所述的背光模组， 其中， 所述背光模组还包括散热 件， 所述散热件设于所述连接部与所述背板之间， 所述散热件包括凹槽、 槽台 以及槽边， 所述连接部包括连背部、 由连背部一侧延伸形成的承载部以及连接 于连背部和承载部之间的斜连部； 其中， 所述连背部置于所述凹槽内， 固定元件通过所述连背部、 所述凹槽 及所述背板上各设有的通孔而将所述连背部、 所述凹槽和所述背板固定， 所述 承载部设于所述槽台之上以承载所述导光板， 并且所述承载部抵接所述光源， 所述斜连部配合所述槽边放置。
14、 根据权利要求 13所述的背光模组， 其中， 所述固定元件为螺钉， 所 述通孔为螺紋孔。
15、 根据权利要求 13所述的背光模组， 其中， 所述光源包括若干点光源 以及与所述若干点光源电性连接的光源电路板，所述抵接部包括支撑部以及连 接支撑部的至少一个凸出部， 所述散热件还包括侧壁， 其中， 所述光源电路板固定于所述侧壁上， 所述支撑部设于所述承载部上 以限制导光板与所述承载部之间设置的反射片的移动， 所述凸出部邻近并处于 若干点光源之间， 并且所述凸出部在耦光距离方向的尺寸大于所述点光源在耦 光距离方向的尺寸。
16、 根据权利要求 15所述的背光模组， 其中， 所述光源电路板与所述侧 壁之间设置有导热膏。
17、 根据权利要求 15所述的背光模组， 其中， 所述光源电路板与所述侧 壁之间设置有导热胶。
18、 根据权利要求 11所述的背光模组， 其中， 所述限位件一体成型。
19、 根据权利要求 11所述的背光模组， 其中， 所述限位件的材质为金属。
20、 根据权利要求 11所述的背光模组， 其中， 所述限位件的材质为塑料。
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