WO2012142791A1 - 侧光式背光源装置及液晶显示器 - Google Patents

侧光式背光源装置及液晶显示器 Download PDF

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Publication number
WO2012142791A1
WO2012142791A1 PCT/CN2011/076152 CN2011076152W WO2012142791A1 WO 2012142791 A1 WO2012142791 A1 WO 2012142791A1 CN 2011076152 W CN2011076152 W CN 2011076152W WO 2012142791 A1 WO2012142791 A1 WO 2012142791A1
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WO
WIPO (PCT)
Prior art keywords
edge
plate body
backlight device
wedge
heat dissipating
Prior art date
Application number
PCT/CN2011/076152
Other languages
English (en)
French (fr)
Inventor
郭仪正
周革革
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 US13/318,357 priority Critical patent/US8545081B2/en
Publication of WO2012142791A1 publication Critical patent/WO2012142791A1/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
    • G02B6/0085—Means for removing heat created by the light source from 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
    • 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
    • G02F1/133628—Illuminating devices with cooling means

Definitions

  • the present invention relates to the field of liquid crystal displays, and more particularly to an edge-lit backlight device and a liquid crystal display for a liquid crystal display.
  • the liquid crystal display is a flat panel display device that uses liquid crystal display images, and has advantages such as thinness, low driving voltage, and low power consumption compared with other display devices, and is widely used throughout the industry.
  • the liquid crystal display panel in the liquid crystal display cannot be autonomously illuminated, and therefore it is required to provide a light source device such as a backlight device.
  • the temperature rise near the light source is significant.
  • the temperature rise not only reduces the luminous efficiency of the light source, but also causes the temperature of the liquid crystal display provided by the light source to be uneven, and the temperature of the liquid crystal display panel near the light source is high and reddish, which affects the liquid crystal display panel. Imaging quality.
  • the temperature rise of the light source will greatly reduce the service life of the light source itself.
  • the technical problem to be solved by the present invention is to provide an edge-lit backlight device and a liquid crystal display, which can solve the problem caused by the temperature rise of the light source.
  • an edge-lit backlight device comprising a light guide plate, a light source and a back plate
  • the light guide plate comprising two wedge plates and a rectangular plate body
  • two The wedge plates are respectively disposed on two sides of the rectangular plate body, and the wedge plate body and the rectangular plate body respectively include a light incident surface and a bottom surface
  • the light source is respectively disposed adjacent to the light incident surface of the wedge plate body and the rectangular plate body
  • the back plate includes The inner surface and the outer surface, the bottom of the back plate is up-cut at a position corresponding to the wedge-shaped plate body to form two spaced protrusions, and a recessed area is defined below each convex portion, and is formed on the inner side of the back plate
  • Two wedge-shaped grooves and one rectangular groove, two wedge-shaped grooves are respectively disposed on two sides of the rectangular groove, and the wedge-shaped plate body and the rectangular plate body are respectively disposed on the two wedges In the slot and the rectangular slot,
  • the heat dissipating component is a heat dissipating fin, and the heat dissipating fin is spaced apart from the outer surface of the backing plate adjacent to the recessed area, the outer surface is an inclined plane, and the heat dissipating fin extends downward from the outer surface to the rectangular plate body. The bottom of the floor is flush.
  • an edge-lit backlight device including a light guide plate, a light source and a back plate.
  • the light guide plate includes two wedge plates and a rectangular plate body. Two wedge-shaped plates are respectively disposed on two sides of the rectangular plate body, and the wedge-shaped plate body and the rectangular plate body respectively include a light-incident surface and a bottom surface; the light source is respectively disposed adjacent to the light-incident surface of the wedge-shaped plate body and the rectangular plate body;
  • the light-emitting backlight device further includes a heat dissipating component, and the heat dissipating component and the light guide plate are respectively located on opposite sides of the backboard.
  • the bottom of the backing plate is alternately formed at the position corresponding to the wedge-shaped plate body to form two spaced projections, and a recessed area is defined below each of the projections.
  • the heat dissipating component is a heat dissipating fin, and the heat dissipating fin is spaced apart from the outer surface of the backing plate adjacent to the recessed area, the outer surface is an inclined plane, and the heat dissipating fin extends downward from the outer surface to the rectangular plate body. The bottom of the floor is flush.
  • the heat dissipating fins are integrally formed on the convex portion of the back plate, and are folded in a vertical shape.
  • the heat dissipating component is a heat dissipating layer, and the heat dissipating layer is filled in the recessed region, and the thickness thereof decreases as the distance from the light incident surface of the rectangular plate body increases.
  • the heat dissipating component is a fan disposed adjacent to the outer surface of the backing plate and adjacent to the light incident surface of the rectangular plate body.
  • the heat dissipating component is a heat pipe disposed adjacent to the outer surface of the backing plate and adjacent to the light incident surface of the rectangular plate body.
  • a liquid crystal display including an edge-lit backlight device, the edge-lit backlight
  • the source device comprises a light guide plate, a light source and a back plate.
  • the light guide plate comprises two wedge plates and a rectangular plate body.
  • the bottom of the backing plate is alternately formed at the position corresponding to the wedge-shaped plate body to form two spaced projections, and a recessed area is defined below each of the projections.
  • the heat dissipating component is a heat dissipating fin, and the heat dissipating fin is spaced apart from the outer surface of the backing plate adjacent to the recessed area, the outer surface is an inclined plane, and the heat dissipating fin extends downward from the outer surface to the rectangular plate body. The bottom of the floor is flush.
  • the arrangement of the heat dissipating fins is parallel to the direction of illumination of the light source.
  • the heat dissipating fins are integrally formed on the convex portion of the back plate, and are folded in a vertical shape.
  • the heat dissipating component is a heat dissipating layer, and the heat dissipating layer is filled in the recessed region, and the thickness thereof decreases as the distance from the light incident surface of the rectangular plate body increases.
  • the heat dissipation layer is wedge shaped.
  • the heat dissipating component is a fan disposed adjacent to the outer surface of the backing plate and adjacent to the light incident surface of the rectangular plate body.
  • the heat dissipating component is a heat pipe disposed adjacent to the outer surface of the backing plate and adjacent to the light incident surface of the rectangular plate body.
  • the light source comprises a plurality of light emitting diodes.
  • the edge-lit backlight device and the liquid crystal display of the present invention have a simple structure, and can realize the regional control function, and can dissipate the heat generated by the light source in time and efficiently, which is not only extended.
  • the service life of the light source, and the problem of impaired imaging quality of the liquid crystal display due to the temperature rise of the light source is avoided.
  • FIG. 1 is a schematic structural view of a first embodiment of an edge-lit backlight device of the present invention
  • FIG. 2 is a schematic structural view of a second embodiment of an edge-lit backlight device of the present invention
  • FIG. 3 is a side-lit backlight of the present invention
  • FIG. 4 is a schematic structural view of a fourth embodiment of the edge-lit backlight device of the present invention.
  • the light guide plate 10 includes two wedge-shaped plate bodies 11 and a rectangular plate body 12, and two wedge-shaped plate bodies 11 are respectively disposed on two sides of the rectangular plate body 12.
  • the side of the wedge-shaped plate body 11 away from the rectangular plate body 12 is thick.
  • the wedge plate body 11 and the rectangular plate body 12 respectively include a light incident surface 13 and a bottom surface 14.
  • the light source 20 is disposed adjacent to the light-incident surface 13 of the wedge-shaped plate body 11 and the rectangular plate body 12, respectively.
  • the light source 20 can employ a plurality of light emitting diodes (LEDs) or a cold cathode fluorescent lamp (CCFL).
  • LEDs light emitting diodes
  • CCFL cold cathode fluorescent lamp
  • the back plate 30 is disposed at the periphery of the light guide plate 10, and the back plate 30 surrounds the light incident surface 13 and the bottom surface 14 of the light guide plate 10.
  • the back plate 30 includes an inner surface 31 and an outer surface 32.
  • the inner surface 31 of the back plate 30 is disposed adjacent to the light-incident surface 13 and the bottom surface 14 of the wedge plate body 11 and the rectangular plate body 12, respectively, for supporting the wedge plate.
  • the body 11 and the rectangular plate body 12, the inner surface 31 of the back plate 30 is further provided with a reflective coating or a reflective sheet to enhance the reflection effect of light.
  • the bottom of the back plate 30 is up-cut at a position corresponding to the wedge-shaped plate body 11 to form two spaced protrusions, thereby defining a cross-section substantially right-angled triangle below each convex portion.
  • the recessed area 35 at the same time, two wedge-shaped grooves 33 and a rectangular groove 34 are formed on the inner side of the back plate 30, and two wedge-shaped grooves 33 are respectively disposed on both sides of the rectangular groove 34, and the wedge The side of the groove 33 away from the rectangular groove 34 is thicker.
  • the dimensions of the wedge-shaped groove 33 and the rectangular groove 34 are slightly larger than the dimensions of the wedge-shaped plate body 11 and the rectangular plate body 12, respectively.
  • the two wedge-shaped plates 11 and the rectangular plate body 12 are respectively disposed in the two wedge-shaped grooves 33 and the rectangular grooves 34.
  • the light sources 20 are correspondingly disposed at positions of the two wedge-shaped grooves 33 adjacent to the two wedge-shaped plate bodies 11 and the light-incident surface 13 of the rectangular plate body 12, respectively.
  • the arrangement direction of the heat dissipation fins is perpendicular to the light emission direction of the light source 20.
  • the arrangement direction of the heat dissipation fins may be parallel to the light source direction of the light source 20 or inclined at a certain angle.
  • the heat dissipation fins may be integrally formed on the back plate 30 by a bending process, that is, the back plate 30 located in the recessed portion 35 is bent up and down to form a heat dissipation fin structure similar to a folded shape.
  • the heat dissipating fins increase the heat dissipating area of the backing plate 30, and the heat generated by the light source 20 is dissipated to the outside in time, thereby improving the service life of the light source 20, and also avoiding the liquid crystal display panel close to the light source 20 due to the temperature rise of the light source 20. (not shown) The reddish phenomenon appears, which improves the display quality.
  • the heat sink fins further increase the mechanical strength of the back plate 30, protecting the light guide plate 10 and the light source 20.
  • FIG. 2 is a schematic structural view of a second embodiment of the edge-lit backlight device of the present invention.
  • the edge-lit backlight device 200 is substantially the same as the edge-lit backlight device 100 of the first embodiment.
  • the main difference is that the heat-dissipating component 42 of the edge-lit backlight device 200 is a heat-dissipating layer material and is filled into the recess.
  • the heat dissipation layer is affixed to the outer surface 32 of the back plate 30, and the thickness of the heat dissipation layer is reduced as the distance from the light incident surface 13 of the rectangular plate body 12 is increased, thereby being wedge-shaped.
  • FIG. 3 is a schematic structural view of a third embodiment of the edge-lit backlight device of the present invention.
  • the edge-lit backlight device 300 is substantially the same as the edge-lit backlight device 100 of the first embodiment.
  • the main difference is that the heat-dissipating component 43 of the edge-lit backlight device 300 is a fan, and the fan is adjacent to the backplane 30.
  • the outer surface 32 is disposed adjacent to the rectangular plate body 12 Light into the surface 13.
  • FIG. 4 is a schematic structural view of a third embodiment of the edge-lit backlight device of the present invention.
  • the edge-lit backlight device 400 is substantially the same as the edge-lit backlight device 100 of the first embodiment.
  • the main difference is that the heat-dissipating component 44 of the edge-lit backlight device 400 is a heat pipe, and the heat pipe is adjacent to the back.
  • the outer surface 32 of the panel 30 is disposed adjacent to the human light surface 13 of the rectangular panel 12.
  • the present invention further provides a liquid crystal display comprising the edge-lit backlight device of the above embodiment.
  • the edge-lit backlight device of the present invention has a simple structure and can dissipate heat generated by the light source in a timely and efficient manner while realizing the regional control function, thereby prolonging the use of the light source. Lifetime, and avoids the problem of impaired imaging quality of the liquid crystal display due to temperature rise of the light source.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Liquid Crystal (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Planar Illumination Modules (AREA)

Description

侧光式背光源装置及液晶显示器
【技术领域】
本发明涉及液晶显示器领域， 特别是涉及一种用于液晶显示器的侧 光式背光源装置及液晶显示器。
【背景技术】
液晶显示器是利用液晶显示图像的平板显示装置， 比其他显示装置 具有轻薄、 低驱动电压及低功耗等优点， 在整个产业上得到广泛使用。 然而， 液晶显示器中的液晶显示面板不能自主发光， 因此需要为其提供 一光源装置， 例如一背光源装置。
目前应用的背光源装置在使用时， 靠近光源处的温升很明显。 温升 不仅降低了光源的发光效率， 也使得由光源提供背光的液晶显示器的温 度不均， 以及在靠近光源附近处的液晶显示面板的温度较高而出现泛红 现象， 影响了液晶显示面板的成像质量。 此外， 光源温升会大大降低光 源本身的使用寿命。
【发明内容】
本发明主要解决的技术问题是提供一种侧光式背光源装置及液晶 显示器， 其能解决光源温升带来的问题。
为解决上述技术问题， 本发明釆用的一个技术方案是： 提供一种侧 光式背光源装置， 包括导光板、 光源和背板， 导光板包括两个楔形板体 及一矩形板体， 两个楔形板体分别设置于矩形板体的两侧， 楔形板体及 矩形板体皆分别包括入光面及底面； 光源分别相邻楔形板体和矩形板体 的入光面设置； 背板包括内表面和外表面， 背板的底部在对应楔形板体 的位置处向上换起形成两个间隔的凸起部， 在各凸起部的下方定义出一 个凹陷区， 同时在背板的内侧形成两个楔形槽及一矩形槽， 两个楔形槽 分别设置于矩形槽的两侧， 楔形板体以及矩形板体被分别设置在两个楔 形槽及矩形槽中； 侧光式背光源装置进一步包括散热元件， 散热元件设 置在凹陷区中， 散热元件与导光板分别位于背板的相对两侧。
根据本发明一优选实施例， 散热元件为散热鰭片， 散热鰭片间隔设 置在背板邻近凹陷区的外表面， 外表面为倾斜的平面， 散热鰭片从外表 面向下延伸至与矩形板体的底面齐平。
根据本发明一优选实施例， 散热元件为导热管， 导热管相邻背板的 外表面设置， 且邻近于矩形板体的入光面。
为解决上述技术问题， 本发明釆用的另一个技术方案是： 提供一种 侧光式背光源装置， 包括导光板、 光源和背板， 导光板包括两个楔形板 体及一矩形板体， 两个楔形板体分别设置于矩形板体的两侧， 楔形板体 及矩形板体皆分别包括入光面及底面； 光源分别相邻楔形板体和矩形板 体的入光面设置； 背板设置在导光板的***， 包括内表面和外表面； 侧 光式背光源装置进一步包括散热元件， 散热元件与导光板分别位于背板 的相对两侧。
根据本发明一优选实施例， 背板的底部在对应楔形板体的位置处向 上换起形成两个间隔的凸起部， 在各凸起部的下方定义出一个凹陷区。
根据本发明一优选实施例， 散热元件为散热鰭片， 散热鰭片间隔设 置在背板邻近凹陷区的外表面， 外表面为倾斜的平面， 散热鰭片从外表 面向下延伸至与矩形板体的底面齐平。
根据本发明一优选实施例， 散热鰭片一体形成在背板的凸起部， 呈 上下弯曲的折叠状。
根据本发明一优选实施例， 散热元件为散热层， 散热层填充于凹陷 区， 且其厚度随着其与矩形板体的入光面的距离的增大而减少。
根据本发明一优选实施例， 散热元件为风扇， 风扇相邻背板的外表 面设置， 且邻近于矩形板体的入光面。
根据本发明一优选实施例， 散热元件为导热管， 导热管相邻背板的 外表面设置， 且邻近于矩形板体的入光面。
为解决上述技术问题， 本发明釆用的另一个技术方案是： 提供一种 液晶显示器， 该液晶显示器包括一种侧光式背光源装置， 该侧光式背光 源装置包括导光板、 光源和背板， 导光板包括两个楔形板体及一矩形板 体， 两个楔形板体分别设置于矩形板体的两侧， 楔形板体及矩形板体皆 分别包括入光面及底面； 光源分别相邻楔形板体和矩形板体的入光面设 置； 背板设置在导光板的***， 包括内表面和外表面； 侧光式背光源装 置进一步包括散热元件， 散热元件与导光板分别位于背板的相对两侧。
根据本发明一优选实施例， 背板的底部在对应楔形板体的位置处向 上换起形成两个间隔的凸起部， 在各凸起部的下方定义出一个凹陷区。
根据本发明一优选实施例， 散热元件为散热鰭片， 散热鰭片间隔设 置在背板邻近凹陷区的外表面， 外表面为倾斜的平面， 散热鰭片从外表 面向下延伸至与矩形板体的底面齐平。
根据本发明一优选实施例， 散热鰭片的排列方向与光源的发光方向 平行。
根据本发明一优选实施例， 散热鰭片一体形成在背板的凸起部， 呈 上下弯曲的折叠状。
根据本发明一优选实施例， 散热元件为散热层， 散热层填充于凹陷 区， 且其厚度随着其与矩形板体的入光面的距离的增大而减少。
根据本发明一优选实施例， 散热层呈楔形。
根据本发明一优选实施例， 散热元件为风扇， 风扇相邻背板的外表 面设置， 且邻近于矩形板体的入光面。
根据本发明一优选实施例， 散热元件为导热管， 导热管相邻背板的 外表面设置， 且邻近于矩形板体的入光面。
根据本发明一优选实施例， 光源包括多个发光二极体。
本发明的有益效果是： 区别于现有技术， 本发明的侧光式背光源装 置及液晶显示器结构简单， 且在实现区域控制功能的同时能够及时高效 地散去光源产生的热量， 不但延长了光源的使用寿命， 而且避免了因光 源温升而导致的液晶显示器成像质量受损的问题。
【附图说明】
为了更清楚地说明本发明实施例中的技术方案， 下面将对实施例描 述中所需要使用的附图作简单地介绍， 显而易见地， 下面描述中的附图 仅仅是本发明的一些实施例， 对于本领域普通技术人员来讲， 在不付出 创造性劳动的前提下， 还可以根据这些附图获得其他的附图。 其中： 图 1是本发明侧光式背光源装置第一实施例的结构示意图； 图 2是本发明侧光式背光源装置第二实施例的结构示意图； 图 3是本发明侧光式背光源装置第三实施例的结构示意图； 图 4是本发明侧光式背光源装置第四实施例的结构示意图。
【具体实施方式】
下面结合附图和实施例对本发明进行详细说明。
请参阅图 1 , 图 1是本发明侧光式背光源装置第一实施例的结构示 意图。 该侧光式背光源装置 100包括导光板 10、 光源 20、 背板 30以及 散热元件 41。
其中， 导光板 10包括两个楔形板体 11及一矩形板体 12, 两个楔形 板体 11分别设置于矩形板体 12的两侧。 楔形板体 11远离矩形板体 12 的一侧厚度较大。 楔形板体 11及矩形板体 12皆分别包括入光面 13及 底面 14。
光源 20分别相邻楔形板体 11和矩形板体 12的入光面 13设置。 在 本实施例中， 光源 20可以釆用多个发光二极体 ( LED )或者是冷阴极荧 光灯（ CCFL )。
背板 30设置在导光板 10的***， 背板 30包围导光板 10的入光面 13和底面 14。 背板 30包括内表面 31和外表面 32, 背板 30的内表面 31分别相邻楔形板体 11和矩形板体 12的入光面 13、 底面 14以及其他 ***侧面设置， 用于支撑楔形板体 11和矩形板体 12, 背板 30的内表面 31进一步设置反射涂层或者反射片， 以提高光线的反射效果。
在本实施例中， 背板 30的底部在对应楔形板体 11的位置处向上换 起形成两个间隔的凸起部， 从而在各凸起部的下方定义出一个横截面大 致为直角三角形的凹陷区 35 , 同时在背板 30的内侧形成了两个楔形槽 33及一矩形槽 34 , 两个楔形槽 33分别设置于矩形槽 34的两侧， 且楔 形槽 33远离矩形槽 34的一侧厚度较大。 楔形槽 33及矩形槽 34的尺寸 分别略大于楔形板体 11及矩形板体 12的尺寸。两个楔形板体 11以及矩 形板体 12被分别对应设置在两个楔形槽 33及矩形槽 34中。 光源 20相 应地被分别设置在两个楔形槽 33中的邻近两个楔形板体 11与矩形板体 12之入光面 13的位置处。
散热元件 41设置在各凸起部下方的凹陷区 35中， 与导光板 10分 别位于背板 30的相对两侧。 在本实施例中， 散热元件 41包括多个散热 鰭片， 散热鰭片均匀地间隔设置在背板 30邻近凹陷区 35的外表面 32 上， 该外表面 32为倾斜的平面， 散热鰭片从外表面 32向下延伸至与矩 形板体 12的底面 14齐平，且邻近矩形板体 12的入光面 13设置。其中， 散热鰭片的排列方向与光源 20 的发光方向垂直。 当然， 根据产品的设 计需要， 散热鰭片的排列方向还可以与光源 20 的发光方向平行或者倾 斜设置成一定的角度。 进一步地， 散热鰭片可通过折弯工艺一体形成在 背板 30上， 即将位于凹陷区 35的背板 30上下弯折形成类似于折叠状 的散热鰭片结构。 这些散热鰭片增加了背板 30 的散热面积， 有利于将 光源 20产生的热量及时向外部散发， 从而提高光源 20的使用寿命， 也 可以避免因为光源 20温升导致靠近光源 20的液晶显示面板（图未示） 出现的泛红现象， 对应提高了显示质量。 此外， 散热鰭片还进一步增加 了背板 30的机械强度， 保护了导光板 10及光源 20。
请参阅图 2, 图 2是本发明侧光式背光源装置第二实施例的结构示 意图。 该侧光式背光源装置 200与第一实施例的侧光式背光源装置 100 大致相同， 其主要区别在于： 该侧光式背光源装置 200 的散热元件 42 为散热层材料， 被填充至凹陷区 35中。 散热层平铺贴附于背板 30的外 表面 32,且散热层的厚度随着其与矩形板体 12的入光面 13的距离的增 大而减少， 从而呈楔形。
请参阅图 3 , 图 3是本发明侧光式背光源装置第三实施例的结构示 意图。 该侧光式背光源装置 300与第一实施例的侧光式背光源装置 100 大致相同， 其主要区别在于： 该侧光式背光源装置 300 的散热元件 43 为风扇， 风扇相邻背板 30的外表面 32设置， 且邻近于矩形板体 12的 入光面 13。
请参阅图 4, 图 4是本发明侧光式背光源装置第三实施例的结构示 意图。 该侧光式背光源装置 400与第一实施例的侧光式背光源装置 100 大致相同， 其主要区别在于： 该侧光式背光源装置 400 的散热元件 44 为导热管， 导热管相邻背板 30的外表面 32设置， 且邻近于矩形板体 12 的人光面 13。
本发明进一步提供了一种液晶显示器， 该液晶显示器包括上述实施 例中的侧光式背光源装置。
本发明的有益效果是： 区别于现有技术， 本发明的侧光式背光源装 置结构简单， 且在实现区域控制功能的同时能够及时高效地散去光源产 生的热量， 不但延长了光源的使用寿命， 而且避免了因光源温升而导致 的液晶显示器成像质量受损的问题。
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

权 利 要求
1.一种侧光式背光源装置， 包括导光板、 光源和背板， 其特征在于： 所述导光板包括两个楔形板体及一矩形板体， 所述两个楔形板体分 别设置于所述矩形板体的两侧， 所述楔形板体及所述矩形板体皆分别包 括人光面及底面；
所述光源分别相邻所述楔形板体和所述矩形板体的入光面设置； 所述背板包括内表面和外表面， 所述背板的底部在对应所述楔形板 体的位置处向上换起形成两个间隔的凸起部， 在各所述凸起部的下方定 义出一个凹陷区， 同时在所述背板的内侧形成两个楔形槽及一矩形槽， 所述两个楔形槽分别设置于所述矩形槽的两侧， 所述楔形板体以及所述 矩形板体被分别设置在所述两个楔形槽及所述矩形槽中；
所述侧光式背光源装置进一步包括散热元件， 所述散热元件设置在 所述凹陷区中， 所述散热元件与所述导光板分别位于所述背板的相对两 侧。
2.根据权利要求 1所述的侧光式背光源装置， 其特征在于： 所述散 热元件为散热鰭片， 所述散热鰭片间隔设置在所述背板邻近凹陷区的外 表面， 所述外表面为倾斜的平面， 所述散热鰭片从所述外表面向下延伸 至与所述矩形板体的底面齐平。
3.根据权利要求 1所述的侧光式背光源装置， 其特征在于： 所述散 热元件为导热管， 所述导热管相邻所述背板的外表面设置， 且邻近于所 述矩形板体的入光面。
4.一种侧光式背光源装置， 包括导光板、 光源和背板， 其特征在于： 所述导光板包括两个楔形板体及一矩形板体， 所述两个楔形板体分 别设置于所述矩形板体的两侧， 所述楔形板体及所述矩形板体皆分别包 括人光面及底面；
所述光源分别相邻所述楔形板体和所述矩形板体的入光面设置； 所述背板设置在所述导光板的***， 包括内表面和外表面； 所述侧光式背光源装置进一步包括散热元件， 所述散热元件与所述 导光板分别位于所述背板的相对两侧。
5.根据权利要求 1所述的侧光式背光源装置， 其特征在于： 所述背 板的底部在对应楔形板体的位置处向上换起形成两个间隔的凸起部， 在 各凸起部的下方定义出一个凹陷区。
6.根据权利要求 5所述的侧光式背光源装置， 其特征在于： 所述散 热元件为散热鰭片， 所述散热鰭片间隔设置在所述背板邻近凹陷区的外 表面， 所述外表面为倾斜的平面， 所述散热鰭片从所述外表面向下延伸 至与所述矩形板体的底面齐平。
7.根据权利要求 6所述的侧光式背光源装置， 其特征在于： 所述散 热鰭片一体形成在所述背板的凸起部， 呈上下弯曲的折叠状。
8.根据权利要求 5所述的侧光式背光源装置， 其特征在于： 所述散 热元件为散热层， 所述散热层填充于所述凹陷区， 且其厚度随着其与所 述矩形板体的入光面的距离的增大而减少。
9.根据权利要求 4所述的侧光式背光源装置， 其特征在于： 所述散 热元件为风扇， 所述风扇相邻所述背板的外表面设置， 且邻近于所述矩 形板体的入光面。
10.根据权利要求 4所述的侧光式背光源装置， 其特征在于： 所述散 热元件为导热管， 所述导热管相邻所述背板的外表面设置， 且邻近于所 述矩形板体的入光面。
11.一种液晶显示器， 其特征在于， 所述液晶显示器包括一种侧光式 背光源装置， 所述侧光式背光源装置包括导光板、 光源和背板，
所述导光板包括两个楔形板体及一矩形板体， 所述两个楔形板体分 别设置于所述矩形板体的两侧， 所述楔形板体及所述矩形板体皆分别包 括人光面及底面；
所述光源分别相邻所述楔形板体和所述矩形板体的入光面设置； 所述背板设置在所述导光板的***， 包括内表面和外表面； 所述侧光式背光源装置进一步包括散热元件， 所述散热元件与所述 导光板分别位于所述背板的相对两侧。
12.根据权利要求 11所述的侧光式背光源装置， 其特征在于： 所述 背板的底部在对应楔形板体的位置处向上换起形成两个间隔的凸起部， 在各凸起部的下方定义出一个凹陷区。
13.根据权利要求 12所述的侧光式背光源装置， 其特征在于： 所述 散热元件为散热鰭片， 所述散热鰭片间隔设置在所述背板邻近凹陷区的 外表面， 所述外表面为倾斜的平面， 所述散热鰭片从所述外表面向下延 伸至与所述矩形板体的底面齐平。
14.根据权利要求 13所述的侧光式背光源装置， 其特征在于： 所述
15.根据权利要求 13所述的侧光式背光源装置， 其特征在于： 所述 散热鰭片一体形成在所述背板的凸起部， 呈上下弯曲的折叠状。
16.根据权利要求 12所述的侧光式背光源装置， 其特征在于： 所述 散热元件为散热层， 所述散热层填充于所述凹陷区， 且其厚度随着其与 所述矩形板体的入光面的距离的增大而减少。
17.根据权利要求 16所述的侧光式背光源装置， 其特征在于： 所述 散热层呈楔形。
18.根据权利要求 11所述的侧光式背光源装置， 其特征在于： 所述 散热元件为风扇， 所述风扇相邻所述背板的外表面设置， 且邻近于所述 矩形板体的入光面。
19.根据权利要求 11所述的侧光式背光源装置， 其特征在于： 所述 散热元件为导热管， 所述导热管相邻所述背板的外表面设置， 且邻近于 所述矩形板体的入光面。
20.根据权利要求 11所述的侧光式背光源装置， 其特征在于： 所述 光源包括多个发光二极体。
PCT/CN2011/076152 2011-04-21 2011-06-22 侧光式背光源装置及液晶显示器 WO2012142791A1 (zh)

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