WO2015066974A1 - 背光源模组 - Google Patents

背光源模组 Download PDF

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Publication number
WO2015066974A1
WO2015066974A1 PCT/CN2014/070847 CN2014070847W WO2015066974A1 WO 2015066974 A1 WO2015066974 A1 WO 2015066974A1 CN 2014070847 W CN2014070847 W CN 2014070847W WO 2015066974 A1 WO2015066974 A1 WO 2015066974A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
guide plate
emitting element
light guide
backlight
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/CN2014/070847
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English (en)
French (fr)
Inventor
张彦学
萧宇均
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.)
Filing date
Publication date
Application filed by Shenzhen China Star Optoelectronics Technology Co Ltd filed Critical Shenzhen China Star Optoelectronics Technology Co Ltd
Priority to US14/240,353 priority Critical patent/US9417374B2/en
Publication of WO2015066974A1 publication Critical patent/WO2015066974A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • G02B6/0031—Reflecting element, sheet or layer
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—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
    • G02B6/0088—Positioning aspects of the light guide or other optical sheets in the package
    • 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
    • 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
    • G02B6/0085—Means for removing heat created by the light source from the package

Definitions

  • the present invention relates to the field of liquid crystal display technologies, and in particular, to a backlight module. Background technique
  • TFT-LCD Thin Film Traistor-Liquid Crystai Display
  • BL backlight
  • the light source module uses a side-entry backlight.
  • the light-emitting element is disposed on the inner side of the back side wall of the light source frame; then, the light is transmitted to the display area by a Ught Guide Plate (LGP) mounted on the backlight frame.
  • LGP Ught Guide Plate
  • the LGP is disposed along the vertical bottom (the vertical direction between the LGP and the bottom of the backlight frame is vertical).
  • the reflection sheet is horizontal (the direction perpendicular to the vertical direction, that is, the horizontal direction, which includes the longitudinal direction and the lateral direction) is the same as that of the LGP, that is, the reflection sheet is flush with the LGP.
  • a backlight module provided by the present invention, comprising a backlight frame and a light guide plate disposed inside the backlight frame, wherein a light emitting element is disposed at an inner side of a sidewall of the backlight frame,
  • the light guide plate is provided with a first reflection sheet at a lower side of the vertical direction
  • the light-emitting element is provided with a second reflection sheet at a lower side thereof
  • the second reflection sheet extends to the inside of the backlight frame to the inside.
  • the light guide plate is vertically below.
  • the second reflection sheet is located vertically below the first reflection sheet.
  • the first reflection sheet extends toward a side wall of the backlight frame to a lower side of the light-emitting element.
  • the light guide plate is vertically downward and the bottom of the backlight frame is vertically upward.
  • An elastic support member for cushioning is provided, and the elastic support member is formed along the vertical top portion with a placement groove in which the second reflection sheet is placed.
  • the second reflection i is engaged in the placement groove.
  • the second reflection sheet is adhered to the placement groove.
  • the heat emitting sheet is further disposed between the light element and the backlight frame.
  • the light guide plate is fastened to the inside of the backlight frame by a gusset.
  • the light-emitting element is an LED light source.
  • the backlight module provided by the present invention provides a second reflection sheet extending below the light guide plate under the light-emitting element, and the light scattered under the light-emitting element is guided into the light guide plate, thereby The light-in efficiency of the light-emitting element introduced into the light guide plate can be effectively improved.
  • the second reflective sheet is disposed under the first reflective sheet for facilitating the second The installation of the reflective sheet; at the same time, the portion of the second reflective sheet extending below the light guide plate forms an overlapping area with the first reflective sheet, so that there is no contact gap between the first reflective sheet and the second reflective sheet, thereby further ensuring that the light is to be emitted
  • the light scattered under the element is introduced into the light guide plate, so that the light-input efficiency of the light-emitting element into the light guide plate can be effectively improved.
  • the first reflective sheet is extended below the light-emitting element, so that the light under the light-emitting element is directly introduced into the light guide plate by the first reflective sheet, and passes through the first reflective sheet and the second reflective sheet. Forming an overlap region such that there is no interface gap between the first reflection sheet and the second reflection sheet, thereby further ensuring that light scattered under the light-emitting element is introduced into the light guide plate, thereby effectively improving the introduction of the light-emitting element into the light guide plate. Light efficiency.
  • a resilient support member for buffering is disposed between the light guide plate and the backlight frame to protect the light guide plate, and a placement groove is disposed at the top of the elastic support member for placing the second reflective sheet.
  • the position of the second reflection sheet is defined by the placement groove, and the second reflection sheet is ensured to be positioned below the light-emitting element and extends below the light guide plate, thereby further ensuring that the light scattered under the light-emitting element is guided into the light guide plate.
  • the bundle can effectively improve the light-in efficiency of the light-emitting element introduced into the light guide plate.
  • the second reflective sheet is snapped into the placement slot, and the latching of the slot is used to limit the second reflective sheet.
  • the second reflective sheet is adhered to the placement groove, and the second reflective sheet is restrained by the bonding.
  • a heat sink is disposed between the light emitting element and the backlight frame to provide heat dissipation.
  • the light guide plate is fastened by the gusset plate in the backlight frame for easy installation.
  • FIG. 1 is a schematic partial structural diagram of a backlight module according to an embodiment of the present disclosure
  • Figure 2 is a partial enlarged view of A in Figure 1.
  • the directional nouns appearing in the present invention are first defined as follows:
  • the vertical direction of the bottom of the light guide plate 2 and the backlight frame 1 is set.
  • the vertical V, and the side toward the bottom of the backlight frame 1 is defined as the lower side and the bottom side, and the side facing away from the bottom of the backlight frame 1 is defined as the upper side and the top side; the side wall of the backlight frame 1 faces the mounting light guide plate.
  • One side of 2 is the inner side.
  • the backlight module provided in this embodiment includes a backlight frame i and a light guide plate 2 placed inside the backlight frame i, wherein the inner side of the side wall of the backlight frame 1 A light-emitting element 3 is disposed, the light guide plate 2 is provided with a first reflection j ⁇ 4 at a lower side thereof, a second reflection sheet 5 is disposed at a lower side of the light-emitting element 3, and the second reflection sheet 5 is directed to the backlight.
  • the inside of the frame 1 extends to the T side of the light guide plate 2 in the vertical direction.
  • the light reflection element 3 is introduced into the light guide plate 2 by introducing a second reflection under the light-emitting element 3 to the lower portion of the light guide plate 2; t5, and the light scattered under the light-emitting element 3 is introduced into the light guide plate 2, thereby effectively improving the light-emitting element 3 to be introduced into the light guide plate.
  • the light-emitting element 3 may be disposed on the inner side of any one of the side walls of the backlight frame 1; or may be disposed on the inner side of the opposite side walls of the backlight frame 1 at the same time;
  • the frame 1 surrounds the inner side of the four side walls of the light guide plate 2; therefore, the arrangement of the light-emitting elements 3 is not unique, but should fall within the scope of the present invention.
  • it is necessary to ensure that each of the light-emitting elements 3 provided is provided with a second emission sheet along the vertical direction and a second reflection.
  • the ⁇ 5 extends to the inside of the backlight frame 1 to the lower side of the light guide plate 2 in the vertical direction.
  • the first reflective sheet 4 is disposed on the lower side of the light guide plate 2 in the vertical direction
  • the second The reflection sheet 5 extends again to the lower side of the light guide plate 2 in the vertical direction.
  • the second reflection sheet 5 can be made to dry below the reflection sheet 4 in the vertical direction.
  • the second reflective sheet 5 is disposed under the first reflective sheet 4 to facilitate the mounting of the second reflective sheet 5; at the same time, the portion of the second reflective sheet 5 extending below the light guide plate 2 forms an overlapping area with the first reflective surface ⁇ 4 Therefore, there is no interface gap between the first reflection sheet 4 and the second reflection sheet 5, thereby further ensuring that the light scattered under the light-emitting element 3 is guided into the light guide plate 2, thereby effectively improving the introduction of the light-emitting element 3 into the light guide plate.
  • the first reflection sheet 4 when the first reflection sheet 4 is disposed, the first reflection sheet 4 can be horizontally (the direction perpendicular to the vertical direction is the horizontal direction, which includes the longitudinal direction and the lateral direction) and the size of the light guide plate 2. The same, that is, the first reflection sheet 4 and the light guide plate 2 are flush in the horizontal direction.
  • the second reflecting sheet 5 is fixedly disposed under the light-emitting element 3 along the vertical direction, the light-emitting element 3 is not introduced into the light-guiding element 2 to enter the light-receiving efficiency.
  • the second reflection sheet 5 may be ejected from the lower side of the light-emitting element 3 in the vertical direction, thereby failing to improve the light-in efficiency.
  • the first reflection sheet 4 may be extended toward the side wall of the backlight frame 1 to the lower side of the light-emitting element 3 in the vertical direction.
  • the first reflective sheet 4 is extended below the light-emitting element 3, so that the light of the light-emitting element 3 T can be directly introduced into the light guide plate 2 by the first reflective sheet 4, and passed through the first reflective sheet 4 and the second reflective sheet.
  • the sheet 5 forms an overlapping region such that there is no interface gap between the first reflection sheet 4 and the second reflection sheet 5, thereby further ensuring that light scattered under the light-emitting element 3 is guided into the light guide plate 2, thereby effectively improving illumination.
  • the light entering efficiency of the element 3 into the light guide plate 2 is introduced.
  • the light guide plate 2 since the light guide plate 2 is placed in the backlight frame 1, in order to improve the safety of the light guide plate 2, the light guide plate 1 is prevented from colliding with the bottom of the backlight frame to cause damage of the light guide plate 1; 2 A resilient support member 6 for cushioning is disposed between the vertically lower portion and the bottom of the backlight frame 1 in a vertical direction, and a second reflection sheet 5 is formed on the vertical top of the elastic support member 6 for placing the second reflection sheet 5 Place the slot 7.
  • the light guide plate 2 can be protected by the buffering of the elastic support member 6.
  • the second reflective sheet 5 is disposed on the top of the elastic support member 6 with the placement groove 7 and the second reflection sheet 5 is defined by the placement groove 7.
  • the second reflection sheet 5 can be effectively prevented from being along the light-emitting element 3
  • the vertical downward exit is performed to ensure that the second reflection i ⁇ 5 is always located below the illuminating element 3 and extends to the T side of the light guide plate 2, thereby further ensuring that the light scattered under the illuminating element 3 is guided into the light guide plate 2 Therefore, the light-in efficiency of the light-emitting element 3 introduced into the light guide plate 2 can be effectively improved.
  • the elastic support member 6 is a rubber support member.
  • the second reflection sheet 5 is engaged in the placement groove 7, and the clamping action of the placement groove 7 is used. To the limit of the second reflection sheet 5, it is prevented from exiting from the lower side of the light-emitting element 3, and is more convenient to install and produce.
  • the second reflection sheet 5 since the size of the second reflection sheet 5 is smaller than that of the first reflection sheet, the amount of expansion and contraction caused by the influence of temperature and humidity itself is naturally small. Therefore, in order to ensure the stability of the mounting of the second reflection sheet 5, the second reflection sheet 5 is adhered to the placement groove 7, which acts to limit the second reflection sheet 5 by adhesion, preventing it from being emitted from the light-emitting element 3. Exit below the vertical direction.
  • the second reflection sheet 5 can also be placed in the free position in the placement groove 7 ⁇ .
  • a heat sink 8 may be further disposed between the light-emitting element 3 and the backlight frame 1.
  • the light guide plate 2 is fastened and fastened to the inside of the backlight frame 1 by the gusset 9 . Further, the gusset 9 is bolted to the backlight frame 1.
  • the light-emitting element 3 is a light-emitting diode (LED) light source.

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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)
  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)

Abstract

一种背光源模组，包括：背光源框架（1）以及放置在背光源框架（1）的内部的导光板（2）；背光源框架（1）的侧壁的内侧处设置有发光元件（3），导光板（2）沿垂向的下方处设置有第一反射片（4）；发光元件（3）沿垂向的下方处设置有第二反射片（5），并且第二反射片（5）向背光源框架（1）的内部延伸至导光板（2）沿垂向的下方。通过在发光元件（3）下方设置一延伸至导光板（2）下方的第二反射片（5），将发光元件（3）的下方散射出的光导入导光板（2）内，从而可有效地提高发光元件（3）导入导光板（2）中的入光效率。

Description

背光源模组 技术领域
本发明涉及液晶显示器技术领域， 特别涉及 ·种背光源模组。 背景技术
众所周知， 薄膜晶体管液晶显示器 （Thin Film Tra istor-Liquid Crystai Display, 简称 TFT- LCD) 是当前主要的平板显示产品之一。 已经成为了现代信 息技术、 视讯产品中重要的显示平台。 ώ于液晶本体并不发光， 为了实现其显示 功能， 需要配置背光源 （back light, 简称 BL) 模组。
现下较为主流的背:光源模组采用侧入式背光源。 其先是将发光元件设置于背 ：光源框架的侧壁的内侧上； 然后利用安装在背光源框架上的导光板 （Ught Guide Plate, 简称 LGP) 将光传导至显示区范围。 为了保证发光元件同 LGP的耦光效 率 （即发光元件导入 LGP中的入光效率） ， 在 LGP沿垂向的底部 （LGP与背光 源框架的底部之间的垂线方向即为垂向） 设置有反射片。 通常反射片沿水平方向 (与垂向相垂直的方向即为水平方向， 其包括纵向和横向） 与 LGP的尺寸相同， 即反射片与 LGP平齐。
实际使用^人们发现， 当反射片沿水平方向延伸至发光元件沿垂向的下方 曰寸， 发光元件导入 LGP中的入光效率较反射片与 LGP平齐时提高了至少 3% (实 际测量， 亮度由 4735nit提高至 4890nit) 。 因此， 在设置反射片时， 应尽量将其 延伸至发光元件沿垂向的底部。
目前， 在设置反射片时通常的做法有两种。 其一， 是将反射片粘结于 LGP 的底部， 并将其延伸至发光元件沿垂向的下方， 但采用这种设置方式， 反射片受 温度和湿度的影响而产生的涨缩量无法展开， 从而会导致背光源模组画面产生亮 暗不均的现象（即出现波浪状条紋） 。 其二， 是将反射片以自由状态放置于 LGP 与背光源框架之间，并将其延伸至发光元件沿垂向的下方，但采 ]¾这种设置方式， 安装好的背光源模组中的反射片有可能会.从发光元件沿垂向的下方退出， 从而无 法起到提高入光效率的目的。 发明内容
针对上述现有技术中的不足， 本发明的目的在于提供一种背光源框架， 其可 有效地提高发光元件导入导光板中的入光效率。
1 ) 本发明提供的一种背光源模组， 包括背光源框架以及放置在所述背光源 框架的内部的导光板， 其中所述背光源框架的侧壁的内侧处设置有发光元件， 所 述导光板沿垂向的下方处设置有第一反射片， 所述发光元件沿垂向的下方处设置 有第二反射片， 并 所述第二反射片向所述背光源框架的内部延伸至所述导光板 沿垂向的下方。
2)在本发明的第 1 )项的一个优选实施方式中， 所述第二反射片沿垂向位于 所述第一反射片的下方。
3 ) 在本发明的第 1 ) 或第 2) 项的一个优选实施方式中， 所述第一反射片向 所述背光源框架的侧壁延伸至所述发光元件沿垂向的下方。
4) 在本发明的第 1 ) 项到第 3 ) 项中任一项的一个优选实施方式中， 所述导 光板沿垂向的下方与所述背光源框架的底部沿垂向的上方之间设置有用于缓冲 的弹性支撑构件， 所述弹性支撑构件沿垂向的顶部形成有 ¾于放置所述第二反射 片的放置槽。
5 )在本发明的第 4)项的一个优选实施方式中， 所述第二反射 i†卡接于所述 放置槽内。
6)在本发明的第 4)项的一个优选实施方式中， 所述第二反射片粘接于所述 放置槽内。
7) 在本发明的第 1 ) 项到第 6) 项中任一项的一个优选实施方式中， 所述发 ：光元件与所述背光源框架之间还设置有散热片。
8) 在本发明的第 1 ) 项到第 7) 项中任一项的一个优选实施方式中， 所述导 光板通过扣板扣接固定于所述背光源框架的内部。
9) 在本发明的第 1 ) 项到第 8) 项中任一项的一个优选实施方式中， 所述发 光元件为 LED光源。
与现有技术相比， 本发明提供的背光源模组， 其通过在发光元件下方设置一 延伸至导光板下方的第二反射片， 将发光元件的下方散射出的光导入导光板内， 从而可有效地提高发光元件导入导光板中的入光效率。
在进一步的技术方案中， 将第二反射片设置于第一反射片的下方， 便于第二 反射片的安装； 同时通过第二反射片延伸至导光板下方的部分与第一反射片形成 重叠区域， 使得第一反射片与第二反射片之间不存在接□缝隙， 从而进一步确保 将发光元件的下方散射出的光导入导光板内， 从而可有效地提高发光元件导入导 光板中的入光效率。
在进一歩的技术方案中， 将第一反射片延伸至发光元件的下方， 从而利用第 一反射片直接将发光元件下方的光直接导入导光板中， 并且通过第一反射片与第 二反射片形成重叠区域， 使得第一反射片与第二反射片之间不存在接口缝隙， 从 而进一步确保将发光元件的下方散射出的光导入导光板内， 从而可有效地提高发 光元件导入导光板中的入光效率。
在进一步的技术方案中， 导光板与背光源框架之间设置缓冲用的弹性支撑构 件， 可起到保护导光板的作用， 同时在弹性支撑构件的顶部设置有放置槽用于放 置第二反射片， 通过放置槽限定第二反射片的位置， 而保证第二反射片一直位 干发光元件的下方并延伸至导光板的下方， .从而进一步确保将发光元件的下方散 射出的光导入导光板内， 丛而可有效地提高发光元件导入导光板中的入光效率。
在进一步的技术方案中， 第二反射片卡接于放置槽内， 通过放置槽的卡接作 起到对第二反射片的限位作用。
在进一步的技术方案中， 第二反射片粘接于放置槽内， 通过粘接起到对第二 反射片的限位作用。
在进一步的技术方案中， 发光元件与背光源框架之间设置有散热片， 起到散 热诈用。
在进一步的技术方案中， 导光板通过扣板扣接固定于背光源框架内， 便于安 装。
上述技术特征可以各种适合的方式组合或由等效的技术特征来替代， 只要能 够达到本发明的目的。 附图说明
在下文中将基于仅为非限定性的实施例并参考附图来对本发明进行更详细 的描述。 其中：
图 i为本发明实施例提供的背光源模组的局部结构示意图；
图 2为图 1中的 A处的局部放大图。 】 -背光源框架， 2-导光板， 3-发光元件， 4-第一反射片， 5-第二反射片， 6-弹 性支撑构件， 7-放置槽， 8-散热片， 9-扣板。 具体实施方式
为使本发明的目的、 技术方案和优点更加清楚， 下面将对本发明的技术方案 进行清楚、 完整的描述， 基于本发明中的具体实施方式， 本领域普通技术人员在 没有做出创造性劳动的前提下所得到的所有其它实施方式， 都属于本发明所保沪 的范围。
在描述具体实施方式前， 先对本发明中出现的方向性名词做如下限定： 在背:光源模组中， 如图 1所示， 导光板 2与背光源框架 1的底部的垂线方向 设定为垂向 V， 并旦朝向背光源框架 1的底部的一侧定义为下方、 底部， 背离背 光源框架 1的底部的一侧定义为上方、 顶部； 背光源框架 1的侧壁朝向安装导光 板 2的一侧为内侧。
如图 1和图 2所示， 本实施例中提供的背光源模组， 包括背光源框架 i以及 放置在背光源框架 i的内部的导光板 2， 其中背光源框架 1的侧壁的內侧处设置 有发光元件 3， 导光板 2沿垂向的下方处设置有第一反射 j† 4， 发光元件 3沿垂 向的下方处设置有第二反射片 5 , 并且第二反射片 5向背光源框架 1的内部延伸 至导光板 2沿垂向的 T方。
其通过在发光元件 3下方设置一延伸至导光板 2下方的第二反射； t 5， 将发 光元件 3的下方散射出的光导入导光板 2内， 而可有效地提高发光元件 3导入 导光板 2中的入光效率。
需要说明的是， 发光元件 3可设置在背光源框架 1上的任一个侧壁的内侧； 也可同时设置在背光源框架 1上相对的两个侧壁的内侧； 还可同时设置在背光源 框架 1围绕导光板 2的四个侧壁的内侧； 因此发光元件 3的设置情况不唯一， 但 都应落入本发明的保护范围。 同时不论发光元件 3设置在哪个侧壁的内侧以及发 光元件 3设置的数量， 但需保证设置的每个发光元件 3沿垂向的下方均设置有一 个第二发射片， 并 ϋ第二反射 j† 5向背光源框架 1的内部延伸至导光板 2沿垂向 的下方。
本实施倒中， ώ于导光板 2沿垂向的下方处已设置有第一反射片 4， 而第二 反射片 5又延伸至导光板 2沿垂向的下方。 为了便于设置， 可使得第二反射片 5 沿垂向位干第 ·反射片 4的下方。 将第二反射片 5设置于第一反射片 4的下方， 便于第二反射片 5的安装； 同时通过第二反射片 5延伸至导光板 2下方的部分与 第一反射 i† 4形成重叠区域， 使得第一反射片 4与第二反射片 5之间不存在接口 缝隙， 从而进一步确保将发光元件 3的下方散射出的光导入导光板 2内 , 从而可 有效地提高发光元件 3导入导光板 2中的入光效率。
本实施例中， 在设置第一反射片 4时， -可将第一反射片 4沿水平方向 （与垂 向相垂直的方向即为水平方向， 其包括纵向和横向） 与导光板 2的尺寸相同， 即 第一反射片 4与导光板 2在水平方向上平齐。 采 ]¾该种设置方式时， 如果第二反 射片 5是固定安置在发:光元件 3沿垂 ^的下方时， 剣不会对发光元件 3导入导光 板 2中的入光效率。 但如果第二反射片 5以自由状态放置在发光元件 3沿垂向的 下方^， 第二反射片 5有可能从发光元件 3沿垂向的下方退出， 从而无法起到提 高入光效率的目的。 为此， 可将第一反射片 4向背光源框架 1的侧壁延伸至发光 元件 3沿垂向的下方。 将第一反射片 4延伸至发光元件 3的下方， 从而可利用第 一反射片 4直接将发光元件 3 T方的光直接导入导光板 2中， 并 ϋ通过第一反射 片 4与第二反射片 5形成重叠区域， 使得第一反射片 4与第二反射片 5之间不存 在接口缝隙， 从而进一步确保将发光元件 3的下方散射出的光导入导光板 2内， 从而可有效地提高发光元件 3导入导光板 2中的入光效率。
本实施倒中， 由于导光板 2放置于背光源框架 1内， 为了提高导光板 2的安 全性， 防止导光板 1与背光源框架〗的底部磕碰从而造成导光板 1的损坏； 可在 导光板 2沿垂向的下方与背光源框架 1的底部沿垂向的上方之间设置有用于缓冲 的弹性支撑构件 6, 并且在弹性支撑构件 6沿垂向的顶部形成有用于放置第二反 射片 5的放置槽 7。 其通过弹性支撑构件 6的缓冲诈用， 可对导光板 2起到保护 作用。 同^在弹性支撑构件 6的顶部设置有放置槽 7用干放置第二反射片 5 , 通 过放置槽 7限定第二反射片 5的位置， 可有效地防止第二反射片 5从发光元件 3 沿垂向的下方退出， 从而保证第二反射 i† 5一直位于发光元件 3的下方并延伸至 导光板 2的 T方， 从而进一歩确保将发光元件 3的下方散射出的光导入导光板 2 内， 从而可有效地提高发光元件 3导入导光板 2中的入光效率。
迸一步优选的， 弹性支撑构件 6为橡胶支撑构件。
本实施倒中， 第二反射片 5卡接于放置槽 7内， 通过放置槽 7的卡接作用起 到对第二反射片 5的限位诈用， 防止其从发光元件 3沿垂^的下方退出， 同时更 加便于安装、 生产。
本实施倒中， 由于第二反射片 5的尺寸相较于第一反射板较小， 其自身受温 度和湿度的影响而产生的涨缩量也自然较小。 因此， 为了保证第二反射片 5安装 的稳定性， 第二反射片 5粘接于放置槽 7内， 其通过粘接起到对第二反射片 5的 限位作用， 防止其从发光元件 3沿垂向的下方退出。
迸一步需要说明的是， 第二反射片 5还可直以自由状态放置在放置槽 7 ή。 本实施倒中， 为了便于发光元件 3散热， 还可在发光元件 3与背光源框架 1 之间还设置有散热片 8。
本实施倒中， 为了便于背光源模组的组装， 导光板 2通过扣板 9扣接固定于 背光源框架 1的内部。 进一步的， 扣板 9与背光源框架 1栓接固定。
本实施倒中， 发光元件 3采用发光二极管（Light- Emitting Diode, 简称 LED) 光源。
最后应说明的是： 以上实施方式及实施例仅用以说明本发明的技术方案， 而 非对其限制； 尽管参照前述实施方式及实施例对本发明进行了详细的说明， 本领 域的普通技术人员应当理解： 其依然可以对前述实施方式或实施例所记载的技术 方案进行修改， 或者对其中部分技术特征进行等同替换； 而这些修改或者替换， 并不使相应技术方案的本质脱离本发明实施方式或实施例技术方案的精神和范 围。

Claims

权利要求书
1 . 一种背光源模组，包括背光源框架以及放置在所述背光源框架的内部的导 光板， 其中所述背光源框架的侧壁的内侧处设置有发光元件， 所述导光板沿垂向 的下方处设置有第一反射片，
其中， 所述发光元件沿垂向的下方处设置有第二反射 i†， 并且所述第二反射 片向所述背光源框架的內部延伸至所述导光板沿垂向的下方。
2. 根据权利要求 1所述的背光源模组， 其中， 所述第二反射片沿垂向位于所 述第一反射片的 T方。
3. 根据权利要求 1所述的背光源模组， 其中， 所述第一反射片向所述背光源 框架的侧壁延伸至所述发光元件沿垂向的下方。
4. 根据权利要求 2所述的背光源模组， 其中， 所述第一反射片向所述背光源 框架的侧壁延伸至所述发光元件沿垂向的下方。
5. 根据权利要求 1所述的背光源模组， 其中， 所述导光板沿垂向的下方与所 述背光源框架的底部沿垂向的上方之间设置有用于缓冲的弹性支撑构件， 所述弹 性支撑构件沿垂向的顶部形成有 ^于放置所述第二反射片的放置槽。
6. 根据权利要求 2所述的背光源模组， 其中， 所述导光板沿垂向的下方与所 述背光源框架的底部沿垂向的上方之间设置有用于缓冲的弹性支撑构件， 所述弹 性支撑构件沿垂向的顶部形成有 ffl于放置所述第二反射片的放置槽。
7, 根据权利要求 5所述的背光源模组， 其中， 所述第二反射片卡接于所述放 置槽内。
8. 根据权利要求 6所述的背光源模组， 其中， 所述第二反射片卡接于所述放 置槽内。
9. 根据权利要求 5所述的背光源模组， 其中， 所述第二反射片粘接于所述放 置槽内。
10. 根据权利要求 6所述的背光源模组， 其中， 所述第二反射片粘接于所述 放置槽内。
11. 根据权利要求 : 所述的背光源模组， 其中， 所述发光元件与所述背光源 框架之间还设置有散热片。
12. 根据权利要求 2所述的背光源模组， 其中， 所述发光元件与所述背光源 框架之间还设置有散热片。
13. 根据权利要求〗 所述的背光源模组， 其中 所述导光板通过扣板扣接固 定于所述背光源框架的内部。
14. 根据权利要求 2所述的背光源模组， 其中 所述导光板通过扣板扣接固 定于所述背光源框架的内部。
15. 根据权利要求 1所述的背光源模组， 其中, 所述发光元件为 LED光源。
16. 根据权利要求 2所述的背光源模组， 其中， 所述发光元件为 LED光源。
PCT/CN2014/070847 2013-11-08 2014-01-17 背光源模组 Ceased WO2015066974A1 (zh)

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