WO2014005326A1 - 液晶显示装置及其背光模组 - Google Patents

液晶显示装置及其背光模组 Download PDF

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Publication number
WO2014005326A1
WO2014005326A1 PCT/CN2012/078303 CN2012078303W WO2014005326A1 WO 2014005326 A1 WO2014005326 A1 WO 2014005326A1 CN 2012078303 W CN2012078303 W CN 2012078303W WO 2014005326 A1 WO2014005326 A1 WO 2014005326A1
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WO
WIPO (PCT)
Prior art keywords
circuit board
board portion
light guide
guide plate
disposed
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PCT/CN2012/078303
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English (en)
French (fr)
Inventor
黄冲
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深圳市华星光电技术有限公司
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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 US13/578,255 priority Critical patent/US20140009722A1/en
Publication of WO2014005326A1 publication Critical patent/WO2014005326A1/zh

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    • 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
    • G02F1/133608—Direct backlight including particular frames or supporting means
    • 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

Definitions

  • the present invention relates to the field of liquid crystal display technology, and in particular to a display device and a backlight module thereof.
  • FIG. 1 is a schematic structural diagram of a backlight module in the prior art.
  • the backlight module 100 adopts a side-entry light-in method, which includes a light guide plate 110, an LED light source 120, and a printed circuit board 130.
  • the LED light source 120 is disposed on the printed circuit board 130 adjacent to one side of the light guide plate 110.
  • the emitted light of the LED light source 120 is emitted in various directions before entering the light guide plate 110, some of the emitted light does not enter the light guide plate 110 due to reflection or refraction, thereby causing the light coupling plate 110 to have a light coupling efficiency that does not reach the maximum. good.
  • the solution adopted is to increase the size of the reflective sheet, that is, to extend the reflective sheet below the LED to improve the coupling efficiency, but because of the existence of the backplane dimensional tolerance factor and the size of the reflective sheet The thermal expansion factor exists, which leads to the unstable coupling light efficiency.
  • the light coupling plate coupling efficiency has not reached the optimal problem and still cannot be solved well.
  • the present invention provides a liquid crystal display device and a backlight module thereof, which can improve the optical coupling efficiency between the semiconductor light source and the light guide plate.
  • a technical solution adopted by the present invention is to provide a backlight module, including: a light guide plate; a reflection sheet disposed under the light guide plate; and a back frame including a bottom plate and a side plate located at a side of the bottom plate.
  • the reflective sheet is disposed on the upper surface of the bottom plate, the light guide plate is disposed on the reflective sheet, and one side thereof is opposite to the back frame side plate; and the printed circuit board is disposed on a side of the side plate adjacent to the light guide plate, including the vertical direction a circuit board portion and a second circuit board portion extending horizontally from the upper or lower end of the first circuit board portion; the semiconductor light source is disposed on a side of the first circuit board portion adjacent to the light guide plate; wherein the first circuit board portion and a surface of the second circuit board portion facing the side of the semiconductor light source is a reflective surface; a second circuit board portion extends below the reflective sheet; the printed circuit board further includes a third circuit board portion, and the third circuit board portion is from the first circuit board portion
  • the upper guide light plate extends horizontally.
  • the second circuit board portion is disposed at a lower end of the first circuit board portion, and the bottom plate of the back frame is recessed corresponding to a portion of the second circuit board portion to accommodate the second circuit board portion.
  • the reflective surface of the first circuit board portion and the second circuit board portion is a polished surface or is provided with a reflective material.
  • the third circuit board portion extends above the light guide plate, and the surface adjacent to the light guide plate is a reflective surface.
  • a backlight module including: a light guide plate; a reflection sheet disposed under the light guide plate; and a back frame including a bottom plate and a side plate located at a side of the bottom plate
  • the reflective sheet is disposed on the upper surface of the bottom plate
  • the light guide plate is disposed on the reflective sheet, and one side thereof is opposite to the back frame side plate
  • the printed circuit board is disposed on a side of the side plate of the back frame adjacent to the light guide plate, including a vertical direction a first circuit board portion and a second circuit board portion extending horizontally from the upper or lower end of the first circuit board portion
  • the semiconductor light source is disposed on a side of the first circuit board portion adjacent to the light guide plate; wherein the first circuit board portion And a surface of the second circuit board portion facing the side of the semiconductor light source is a reflective surface.
  • the second circuit board portion is disposed at a lower end of the first circuit board portion, and the bottom plate of the back frame is recessed corresponding to a portion of the second circuit board portion to accommodate the second circuit board portion.
  • the second circuit board portion extends below the reflective sheet.
  • the reflective surface of the first circuit board portion and the second circuit board portion is a polished surface or is provided with a reflective material.
  • the printed circuit board further comprises a third circuit board portion, and the third circuit board portion extends horizontally from the upper end of the first circuit board portion to the light guide plate.
  • the third circuit board portion extends above the light guide plate, and the surface adjacent to the light guide plate is a reflective surface.
  • a liquid crystal display device including: a display panel; a backlight module including a light guide plate disposed under the display panel; and a reflective sheet disposed on the light guide plate
  • the back frame comprises a bottom plate and a side plate on the side of the bottom plate, the reflective sheet is disposed on the upper surface of the bottom plate, the light guide plate is disposed on the reflective sheet, and one side thereof is opposite to the back frame side plate;
  • the printed circuit board is disposed on the back frame a side of the side panel adjacent to the light guide plate, including a first circuit board portion in a vertical direction and a second circuit board portion horizontally extending from the upper or lower end of the first circuit board portion;
  • the semiconductor light source is disposed on the first circuit board a portion of the side adjacent to the light guide plate; wherein the surface of the first circuit board portion and the second circuit board portion facing the side of the semiconductor light source is a reflective surface.
  • the second circuit board portion is disposed at a lower end of the first circuit board portion, and the bottom plate of the back frame is recessed corresponding to a portion of the second circuit board portion to accommodate the second circuit board portion.
  • the printed circuit board further comprises a third circuit board portion, and the third circuit board portion extends horizontally from the upper end of the first circuit board portion to the light guide plate.
  • the third circuit board portion extends above the light guide plate, and the surface adjacent to the light guide plate is a reflective surface.
  • the invention has the beneficial effects that the printed circuit board of the fixed semiconductor light source is designed to include the first circuit board portion in the vertical direction and the light guide plate level from the upper end or the lower end portion of the first circuit board portion, different from the prior art.
  • the extended second circuit board portion that is, the surrounding light and the reflective structure of the printed circuit board, the portion of the light emitted from the semiconductor light source in various directions is not reflected or refracted into the light guide plate, and passes through the first circuit.
  • the reflection of the reflective surface of the plate portion and the second circuit board portion enters the light guide plate, thereby improving the optical coupling efficiency between the semiconductor light source and the light guide plate.
  • FIG. 1 is a schematic structural view of a backlight module of the prior art
  • FIG. 2 is a schematic structural view of a first embodiment of a backlight module of the present invention
  • FIG 3 is a schematic structural view of a second embodiment of a backlight module of the present invention.
  • FIG. 2 is a schematic structural diagram of a backlight module according to a first embodiment of the present invention.
  • the backlight module 200 includes a light guide plate 210, a reflection sheet 220, a back frame 230, printed circuit boards (240, 250), and a semiconductor light source 260.
  • the back frame 230 includes a bottom plate (231, 232, 233) and a side plate 234.
  • the reflective sheet 220 is disposed under the light guide plate 210, and a portion of the reflective sheet 220 is disposed on the upper surface of the carrying portion 231 of the bottom plate (231, 232, 234), and another portion of the reflective sheet 220 is exposed to the adjacent side plate 234 of the carrying portion 231. Outside one side.
  • the light guide plate 210 is further disposed on the reflective sheet 220, and one side thereof is opposite to the side plate 234.
  • the printed circuit board (240, 250) includes a first circuit board portion 240 in a vertical direction and a second circuit board portion 250 extending horizontally from the lower end of the first circuit board portion 240 to the light guide plate 210, which is disposed adjacent to the side plate 234.
  • the first circuit board portion 240 is disposed on a side of the side 234 adjacent to the light guide plate 210.
  • the second circuit board portion 250 may also be disposed to extend horizontally from the upper end of the first circuit board portion 240 to the light guide plate 210.
  • the printed circuit board is MCPCB (Metal Core Printed Circuit Board, in other embodiments, the printed circuit board can also be selected as a circuit board of other materials, and is not limited herein.
  • the second circuit board portion 250 is disposed at a lower end of the first circuit board portion 240.
  • the bottom plate (231, 232, 233) of the back frame 230 is recessed corresponding to the area of the second circuit board portion 250 to form a recess.
  • the portion 233 is adapted to receive the second circuit board portion 250, and the carrying portion 231 of the bottom plate (231, 232, 233) and the recess portion 233 are connected by a bent portion 232.
  • the semiconductor light source 260 is disposed on a side of the first circuit board portion 240 adjacent to the light guide plate 210, wherein the surfaces of the first circuit board portion 240 and the second circuit board portion 250 facing the side of the semiconductor light source 260 are all reflective surfaces.
  • the semiconductor light source 260 can be an LED light source or other semiconductor light source.
  • the second circuit board portion 250 extends below the reflective sheet 220. In the outgoing light of the semiconductor light source 260 in various directions, the portion of the light that fails to enter the light guide plate 210 due to reflection or refraction may enter the light guide plate through the reflection of the reflective surface of the first circuit board portion 240 and the second circuit board portion 250. 210.
  • the reflective surface of the first circuit board portion 240 and the second circuit board portion 250 may be a polished surface that has been subjected to a polishing process or a high-reflection material that is vapor-deposited on the surface, and is not limited thereto.
  • FIG. 3 is a schematic structural diagram of a backlight module according to a second embodiment of the present invention.
  • the backlight module 300 of the second embodiment of the present invention includes a light guide plate 310, a reflection sheet 320, a back frame 330, printed circuit boards (340, 350, 360), and a semiconductor light source 370.
  • the back frame 330 includes a bottom plate (331, 332, 333) and a side plate 334.
  • the reflective sheet 320 is disposed under the light guide plate 310, and a portion of the reflective sheet 320 is disposed on the upper surface of the carrying portion 331 of the bottom plate (331, 332, 333), and another portion of the reflective sheet 320 is exposed to the adjacent side plate 334 of the carrying portion 331. Outside the side.
  • the light guide plate 310 is further disposed on the reflective sheet 320 with one side opposite to the side 334.
  • a printed circuit board (340, 350, 360) is disposed on a side of the side plate 334 adjacent to the light guide plate 310, including a first circuit board portion 340 in a vertical direction, and a second circuit extending horizontally from a lower end of the first circuit board portion 340.
  • the board portion 350 and a third circuit board portion 360 extending horizontally from the upper end of the first circuit board portion 340.
  • the second circuit board portion 350 is disposed at a lower end of the first circuit board portion 340.
  • the bottom plate (331, 332, 333) of the back frame 330 is recessed corresponding to the area of the second circuit board portion 350 to form a recess.
  • the portion 333 is configured to receive the second circuit board portion 350, and the bearing portion 331 and the recess portion 333 are connected by a bent portion 332.
  • the third circuit board portion 360 is disposed at an upper end of the first circuit board portion 340, and the third circuit board portion 360 extends above the light guide plate 310, wherein a surface adjacent to the light guide plate 310 is a reflective surface.
  • the semiconductor light source 370 is disposed on a side of the first circuit board portion 340 adjacent to the light guide plate 310; wherein the surfaces of the first circuit board portion 340 and the second circuit board portion 350 facing the semiconductor light source 370 are also reflective surfaces. And the second circuit board portion 350 extends below the reflective sheet 320.
  • the portion of the light that fails to enter the light guide plate 310 due to reflection or refraction can be reflected by the first circuit board portion 340, the second circuit board portion 350, and the third circuit board portion 360.
  • the reflection of the face enters the light guide plate 310.
  • the reflective surface of the first circuit board portion 340, the second circuit board portion 350, and the third circuit board portion 360 may be a polished surface that has been subjected to a polishing process or a surface that is vapor-deposited with a highly reflective material, etc., which is not limited thereto.
  • the present invention further discloses a liquid crystal display device, which can be further referred to FIG. 3, which includes a display panel 380 and a backlight module 300 for providing a backlight for the display panel 380.
  • the backlight module 300 includes a light guide plate 310, a reflective sheet 320, a back frame 330, printed circuit boards (340, 350, 360), and a semiconductor light source 370.
  • the reflective sheet 320 is disposed under the light guide plate 310.
  • the back frame 330 includes a bottom plate (331, 332, 333) and a side plate 334 located at a side of the bottom plate (331, 332, 333).
  • the reflective sheet 320 is disposed on the bottom plate (331, 332, 333) upper surface, the light guide plate 310 is disposed on the reflective sheet 320, one side of which is opposite to the side plate 334 of the back frame 330; and the printed circuit board (340, 350, 360) is disposed on the side plate 334 of the back frame 330.
  • One side of the adjacent light guide plate 310 includes a first circuit board portion 340 in a vertical direction and a second circuit board portion 350 horizontally extending from the upper or lower end of the first circuit board portion 340 to the light guide plate 310; the semiconductor light source 370 is disposed at the A side of the circuit board portion 340 adjacent to the light guide plate 310; wherein the surface of the first circuit board portion 340 and the second circuit board portion 350 facing the semiconductor light source 370 is a reflective surface.
  • the second circuit board portion 350 is disposed at a lower end of the first circuit board portion 340, and the bottom plate (331, 332, 333) of the back frame 330 is recessed corresponding to the area of the second circuit board portion 350 to accommodate the second circuit board. Part 350.
  • the printed circuit board (340, 350, 360) further includes a third circuit board portion 360 that extends horizontally from the upper end of the first circuit board portion 340 to the light guide plate 310.
  • the third circuit board portion 360 extends above the light guide plate 310, and the surface adjacent to the light guide plate 310 is a reflective surface.
  • the liquid crystal display device may be a TFT-LCD liquid crystal module or other types of liquid crystal display devices, and is not limited herein.
  • the liquid crystal display device of the present invention and the backlight module thereof are designed to fix the printed circuit board (340, 350, 360) of the semiconductor light source 370 to include the first circuit board portion 340 in the vertical direction.
  • a second circuit board portion 350 extending horizontally from the lower end of the first circuit board portion 340 to the light guide plate 310 and a third circuit board portion 360 extending horizontally from the upper end of the first circuit board portion 340 to the light guide plate 310, that is, the printed circuit board is skillfully utilized
  • the surrounding, reflective structure of (340, 350, 360) passes the portion of the light exiting the semiconductor light source 370 toward the light guide plate 310 into the light guide plate 310 through the first circuit board portion 340 and the second circuit.
  • the reflection of the reflective surface of the plate portion 350 and the third circuit board portion 360 enters the light guide plate 310, thereby improving the optical coupling efficiency between the semiconductor light source 370 and the light guide plate 310.
  • the second circuit board portion 350 and the third circuit board portion 360 of the upper or lower end of the printed circuit board (340, 350, 360) may also be designed in a circular arc shape.
  • the corner structure is respectively disposed on the first circuit board portion 340 of the printed circuit board (340, 350, 360), and the semiconductor and the reflective structure of the printed circuit board (340, 350, 360) can also be used to improve the semiconductor.

Abstract

一种背光模组（200）及液晶显示装置，包括导光板（210）；反射片（220），设置于导光板（210）下方；背框（230），包括底板（231-233）和位于底板（231-233）侧边的侧板（234），反射片（220）设置于底板（231）上表面，导光板（210）设置于反射片（220）上，其一侧边与背框（230）侧板（234）相对；印刷电路板（240、250），设置于背框（230）的侧板（234）的邻近导光板（210）一侧，包括竖直方向的第一电路板部分（240）以及自第一电路板部分（240）上端或下端向导光板（210）水平延伸的第二电路板部分（250）；半导体光源（260），设置于第一电路板部分（240）的邻近导光板（210）一侧；其中，第一电路板部分（240）和第二电路板部分（250）的朝向半导体光源（260）一侧的表面为反光面。通过上述方式，半导体光源（260）与导光板（210）之间的光学耦合效率能够得到很好地提升。

Description

液晶显示装置及其背光模组
【技术领域】
本发明涉及液晶显示技术领域，特别是涉及显示装置及其背光模组。
【背景技术】
在侧入式LED（Light Emitting Diode，发光二极管）背光模组中，LED的出射光耦合入导光板内，再通过导光板内部的全反射而从导光板上表面出射，进而将LED点光源转换成面光源。请参阅图1，图1为现有技术一种背光模组的结构示意图。背光模组100采用侧入式入光方式，其包括导光板110、LED光源120以及印刷电路板130。LED光源120邻近导光板110的一侧设置在印刷电路板130上。由于LED光源120的出射光在进入导光板110之前是朝各个方向进行射出，故有部分出射光因反射或者折射而并未进入导光板110内，从而导致导光板110耦光效率并未达到最佳。
现有技术中，为了解决上述的问题，所采用的解决设计为增加反射片的尺寸，即将反射片伸入LED下方以提升耦光效率，但因为有背板尺寸公差因素的存在以及反射片尺寸受热膨胀的因素存在，从而导致所提升的耦光效率不稳定的现象，导光板耦光效率并未达到最佳的问题仍未能得到很好的解决。
【发明内容】
为了至少部分解决以上问题，本发明提出了一种液晶显示装置及其背光模组，能够很好地提升半导体光源与导光板之间的光学耦合效率。
为解决上述技术问题，本发明采用的一个技术方案是：提供一种背光模组，包括：导光板；反射片，设置于导光板下方；背框，包括底板和位于底板侧边的侧板，反射片设置于底板上表面，导光板设置于反射片上，其一侧边与背框侧板相对；印刷电路板，设置于背框的侧板的邻近导光板一侧，包括竖直方向的第一电路板部分以及自第一电路板部分上端或下端向导光板水平延伸的第二电路板部分；半导体光源，设置于第一电路板部分的邻近导光板一侧；其中，第一电路板部分和第二电路板部分的朝向半导体光源一侧的表面为反光面；第二电路板部分延伸至反射片下方；印刷电路板进一步包括第三电路板部分，第三电路板部分自第一电路板部分上端向导光板水平延伸。
其中，第二电路板部分设置于第一电路板部分的下端，背框的底板对应第二电路板部分的区域下凹，以容纳第二电路板部分。
其中，第一电路板部分和第二电路板部分的反光面是抛光面或设置有反光材料。
其中，第三电路板部分延伸至导光板上方，且邻近导光板的表面是反光面。
为解决上述技术问题，本发明采用的另一个技术方案是：提供一种背光模组，包括：导光板；反射片，设置于导光板下方；背框，包括底板和位于底板侧边的侧板，反射片设置于底板上表面，导光板设置于反射片上，其一侧边与背框侧板相对；印刷电路板，设置于背框的侧板的邻近导光板一侧，包括竖直方向的第一电路板部分以及自第一电路板部分上端或下端向导光板水平延伸的第二电路板部分；半导体光源，设置于第一电路板部分的邻近导光板一侧；其中，第一电路板部分和第二电路板部分的朝向半导体光源一侧的表面为反光面。
其中，第二电路板部分设置于第一电路板部分的下端，背框的底板对应第二电路板部分的区域下凹，以容纳第二电路板部分。
其中，第二电路板部分延伸至反射片下方。
其中，第一电路板部分和第二电路板部分的反光面是抛光面或设置有反光材料。
其中，印刷电路板进一步包括第三电路板部分，第三电路板部分自第一电路板部分上端向导光板水平延伸。
其中，第三电路板部分延伸至导光板上方，且邻近导光板的表面是反光面。
为解决上述技术问题，本发明采用的又一个技术方案是：提供一种液晶显示装置，包括：显示面板；背光模组，包括导光板，设置于显示面板的下方；反射片，设置于导光板下方；背框，包括底板和位于底板侧边的侧板，反射片设置于底板上表面，导光板设置于反射片上，其一侧边与背框侧板相对；印刷电路板，设置于背框的侧板的邻近导光板一侧，包括竖直方向的第一电路板部分以及自第一电路板部分上端或下端向导光板水平延伸的第二电路板部分；半导体光源，设置于第一电路板部分的邻近导光板一侧；其中，第一电路板部分和第二电路板部分的朝向半导体光源一侧的表面为反光面。
其中，第二电路板部分设置于第一电路板部分的下端，背框的底板对应第二电路板部分的区域下凹，以容纳第二电路板部分。
其中，印刷电路板进一步包括第三电路板部分，第三电路板部分自第一电路板部分上端向导光板水平延伸。
其中，第三电路板部分延伸至导光板上方，且邻近导光板的表面是反光面。
本发明的有益效果是：区别于现有技术的情况，本发明将固定半导体光源的印刷电路板设计为包括竖直方向的第一电路板部分以及自第一电路板部分上端或下端向导光板水平延伸的第二电路板部分，即巧妙地利用印刷电路板的包围式、反射结构将半导体光源朝各个方向的出射光中的因反射或折射未能进入导光板的这一部分光线，通过第一电路板部分和第二电路板部分的反光面的反射作用进入导光板中，从而很好地提升半导体光源与导光板之间的光学耦合效率。
【附图说明】
图1是现有技术一种背光模组的结构示意图；
图2是本发明背光模组第一实施方式的结构示意图；
图3是本发明背光模组第二实施方式的结构示意图。
【具体实施方式】
下面将结合本发明实施方式中的附图，对本发明实施方式中的技术方案进行清楚、完整地描述，显然，所描述的实施方式仅仅是本发明一部分实施方式，而不是全部的实施方式。基于本发明中的实施方式，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施方式，均属于本发明保护的范围。
请参阅图2，图2是本发明第一实施方式的背光模组的结构示意图。
本发明第一实施方式的背光模组200包括导光板210、反射片220、背框230、印刷电路板（240、250）以及半导体光源260。
背框230包括底板（231、232、233）以及侧板234。反射片220设置于导光板210的下方，并且反射片220的一部分设置于底板（231、232、234）的承载部231上表面，反射片220的另一部分暴露于承载部231的邻近侧板234一侧之外。导光板210进一步设置于反射片220上，其一侧边与侧板234相对。
印刷电路板（240、250）包括竖直方向的第一电路板部分240以及自第一电路板部分240下端向导光板210水平延伸的第二电路板部分250，其设置于侧板234的邻近导光板210的一侧。具体为第一电路板部分240设置于侧边234的邻近导光板210的一侧。值得注意的是，第二电路板部分250也可设置于自第一电路板部分240上端向导光板210水平延伸。在本实施方式中，印刷电路板为MCPCB（Metal Core Printed Circuit Board，金属基印刷电路板），在其他实施方式中，印刷电路板也可选取为其它材料的电路板，此处不作过多限制。
第二电路板部分250设置于第一电路板部分240的下端，从图2可以看出，背框230的底板（231、232、233）对应第二电路板部分250的区域下凹，形成凹陷部233以便容纳第二电路板部分250，底板（231、232、233）的承载部231以及凹陷部233之间通过一弯折部232连接。
半导体光源260设置于第一电路板部分240的邻近导光板210的一侧，其中第一电路板部分240和第二电路板部分250的朝向半导体光源260一侧的表面均为反光面。半导体光源260可以是LED光源或其他半导体发光光源。值得注意的是，第二电路板部分250延伸至反射片220下方。在半导体光源260朝各个方向的出射光中，因反射或折射未能进入导光板210的这一部分光线可通过第一电路板部分240和第二电路板部分250的反光面的反射作用进入导光板210中。上述第一电路板部分240和第二电路板部分250的反光面可以是进行过抛光处理的抛光面或者表面蒸镀有高反射材料等，此处不作过多限制。
请参阅图3，图3是本发明第二实施方式的背光模组的结构示意图。
本发明第二实施方式的背光模组300包括导光板310、反射片320、背框330、印刷电路板（340、350、360）以及半导体光源370。
背框330包括底板（331、332、333）以及侧板334。反射片320设置于导光板310下方，并且反射片320的一部分设置于底板（331、332、333）的承载部331上表面，反射片320的另一部分暴露于承载部331的邻近侧板334一侧之外。导光板310进一步设置于反射片320上，其一侧边与侧边334相对。
印刷电路板（340、350、360）设置于侧板334的邻近导光板310的一侧，包括竖直方向的第一电路板部分340、自第一电路板部分340下端水平延伸的第二电路板部分350以及自第一电路板部分340上端水平延伸的第三电路板部分360。
第二电路板部分350设置于第一电路板部分340的下端，从图3可以看出，背框330的底板（331、332、333）对应第二电路板部分350的区域下凹，形成凹陷部333以便容纳第二电路板部分350，承载部331以及凹陷部333之间通过一弯折部332连接。
第三电路板部分360设置于第一电路板部分340的上端，且第三电路板部分360延伸至导光板310上方，其中，邻近导光板310的表面为反光面。半导体光源370设置于第一电路板部分340的邻近导光板310的一侧；其中，第一电路板部分340和第二电路板部分350的朝向半导体光源370一侧的表面也均为反光面，且第二电路板部分350延伸至反射片320下方。在半导体光源370朝各个方向的出射光中，因反射或折射未能进入导光板310的这一部分光线可通过第一电路板部分340、第二电路板部分350以及第三电路板部分360的反光面的反射作用进入导光板310中。上述第一电路板部分340、第二电路板部分350以及第三电路板部分360的反光面可以是进行过抛光处理的抛光面或者表面蒸镀有高反射材料等，此处不作过多限制。
本发明进一步公开了一种液晶显示装置，可再参阅图3，其包括显示面板380以及用于为显示面板380提供背光源的背光模组300。背光模组300包括导光板310、反射片320、背框330、印刷电路板（340、350、360）以及半导体光源370。其中，反射片320设置于导光板310下方；背框330包括底板（331、332、333）和位于底板（331、332、333）侧边的侧板334，反射片320设置于底板（331、332、333）上表面，导光板310设置于反射片320上，其一侧边与背框330的侧板334相对；印刷电路板（340、350、360）设置于背框330的侧板334的邻近导光板310的一侧，包括竖直方向的第一电路板部分340以及自第一电路板部分340上端或下端向导光板310水平延伸的第二电路板部分350；半导体光源370设置于第一电路板部分340的邻近导光板310的一侧；其中第一电路板部分340和第二电路板部分350的朝向半导体光源370一侧的表面为反光面。
其中，上述第二电路板部分350设置于第一电路板部分340的下端，背框330的底板（331、332、333）对应第二电路板部分350的区域下凹，以便容纳第二电路板部分350。上述印刷电路板（340、350、360）进一步包括第三电路板部分360，其自第一电路板部分340上端向导光板310水平延伸。第三电路板部分360延伸至导光板310上方，且邻近导光板310的表面是反光面。液晶显示装置可以为TFT-LCD液晶模组，也可为其它类型的液晶显示装置，此处不作过多限制。
区别于现有技术，本发明的液晶显示装置及其背光模组通过上述方式，将固定半导体光源370的印刷电路板（340、350、360）设计为包括竖直方向的第一电路板部分340、自第一电路板部分340下端向导光板310水平延伸的第二电路板部分350以及自第一电路板部分340上端向导光板310水平延伸的第三电路板部分360，即巧妙地利用印刷电路板（340、350、360）的包围式、反射结构将半导体光源370朝各个方向的出射光中的因反射或折射未能进入导光板310的这一部分光线通过第一电路板部分340和第二电路板部分350以及第三电路板部分360的反光面的反射作用进入导光板310中，从而很好地提升半导体光源370与导光板310之间的光学耦合效率。
值得说明的是，在本发明更多的实施方式中，印刷电路板（340、350、360）的上端或下端的第二电路板部分350、第三电路板部分360也可设计为圆弧形转角结构，分别与印刷电路板（340、350、360）的第一电路板部分340相接设置，亦可利用印刷电路板（340、350、360）的包围式、反射结构很好地提升半导体光源370与导光板310之间的光学耦合效率。
以上所述仅为本发明的实施例，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。

Claims (14)

  1. 一种背光模组，其中，包括：
    导光板；
    反射片，设置于所述导光板下方；
    背框，包括底板和位于底板侧边的侧板，所述反射片设置于底板上表面，所述导光板设置于反射片上，其一侧边与背框侧板相对；
    印刷电路板，设置于所述背框的侧板的邻近导光板一侧，包括竖直方向的第一电路板部分以及自第一电路板部分上端或下端向导光板水平延伸的第二电路板部分；
    半导体光源，设置于所述第一电路板部分的邻近导光板一侧；
    其中，所述第一电路板部分和第二电路板部分的朝向半导体光源一侧的表面为反光面；
    所述第二电路板部分延伸至反射片下方；
    所述印刷电路板进一步包括第三电路板部分，所述第三电路板部分自第一电路板部分上端向导光板水平延伸。
  2. 根据权利要求1所述的背光模组，其中，
    所述第二电路板部分设置于第一电路板部分的下端，所述背框的底板对应第二电路板部分的区域下凹，以容纳所述第二电路板部分。
  3. 根据权利要求1所述的背光模组 ，其中，
    所述第一电路板部分和第二电路板部分的反光面是抛光面或设置有反光材料。
  4. 根据权利要求1所述的背光模组 ，其中，
    所述第三电路板部分延伸至导光板上方，且邻近所述导光板的表面是反光面。
  5. 一种背光模组，其中，包括：
    导光板；
    反射片，设置于所述导光板下方；
    背框，包括底板和位于底板侧边的侧板，所述反射片设置于底板上表面，所述导光板设置于反射片上，其一侧边与背框侧板相对；
    印刷电路板，设置于所述背框的侧板的邻近导光板一侧，包括竖直方向的第一电路板部分以及自第一电路板部分上端或下端向导光板水平延伸的第二电路板部分；
    半导体光源，设置于所述第一电路板部分的邻近导光板一侧；
    其中，所述第一电路板部分和第二电路板部分的朝向半导体光源一侧的表面为反光面 。
  6. 根据权利要求5所述的背光模组，其中，
    所述第二电路板部分设置于第一电路板部分的下端，所述背框的底板对应第二电路板部分的区域下凹，以容纳所述第二电路板部分。
  7. 根据权利要求6所述的背光模组，其中，
    所述第二电路板部分延伸至反射片下方。
  8. 根据权利要求7所述的背光模组，其中，
    所述第一电路板部分和第二电路板部分的反光面是抛光面或设置有反光材料。
  9. 根据权利要求6所述的背光模组，其中，
    所述印刷电路板进一步包括第三电路板部分，所述第三电路板部分自第一电路板部分上端向导光板水平延伸。
  10. 根据权利要求9所述的背光模组，其中，
    所述第三电路板部分延伸至导光板上方，且邻近所述导光板的表面是反光面。
  11. 一种液晶显示装置，其中，包括：
    显示面板；
    背光模组，包括：
    导光板，设置于所述显示面板的下方；
    反射片，设置于所述导光板下方；
    背框，包括底板和位于底板侧边的侧板，所述反射片设置于底板上表面，所述导光板设置于反射片上，其一侧边与背框侧板相对；
    印刷电路板，设置于所述背框的侧板的邻近导光板一侧，包括竖直方向的第一电路板部分以及自第一电路板部分上端或下端向导光板水平延伸的第二电路板部分；
    半导体光源，设置于所述第一电路板部分的邻近导光板一侧；
    其中，所述第一电路板部分和第二电路板部分的朝向半导体光源一侧的表面为反光面。
  12. 根据权利要求11所述的液晶显示装置，其中，
    所述第二电路板部分设置于第一电路板部分的下端，所述背框的底板对应第二电路板部分的区域下凹，以容纳所述第二电路板部分。
  13. 根据权利要求12所述的液晶显示装置，其中，
    所述印刷电路板进一步包括第三电路板部分，所述第三电路板部分自第一电路板部分上端向导光板水平延伸。
  14. 根据权利要求13所述的背光模组，其中，
    所述第三电路板部分延伸至导光板上方，且邻近所述导光板的表面是反光面。
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