WO2014056273A1 - 一种背板及使用其的背光模组和液晶显示装置 - Google Patents

一种背板及使用其的背光模组和液晶显示装置 Download PDF

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Publication number
WO2014056273A1
WO2014056273A1 PCT/CN2012/084762 CN2012084762W WO2014056273A1 WO 2014056273 A1 WO2014056273 A1 WO 2014056273A1 CN 2012084762 W CN2012084762 W CN 2012084762W WO 2014056273 A1 WO2014056273 A1 WO 2014056273A1
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Prior art keywords
metal member
sheet metal
heat dissipation
light source
heat
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PCT/CN2012/084762
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English (en)
French (fr)
Inventor
郭仪正
陈伟丰
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深圳市华星光电技术有限公司
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Priority to US13/703,034 priority Critical patent/US8854571B2/en
Publication of WO2014056273A1 publication Critical patent/WO2014056273A1/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
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • 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

Definitions

  • the invention belongs to the technical field of liquid crystal display and relates to a backboard having a hollow structure design. More specifically, the present invention relates to the above-described back sheet having improved heat dissipation effect, and a backlight module and a liquid crystal display device having the same.
  • a conventional liquid crystal display device includes structural components such as a front frame, a liquid crystal display panel, a plastic frame, an optical film, a light guide plate, a light source, and a back plate.
  • the back plate adopts a hollow structure design (Fig. 1), which helps to reduce the weight and cost of the whole module.
  • the back plate of the hollow design can also dissipate the heat generated by the light source in time.
  • the hollowing out design can improve the heat dissipation effect, the temperature distribution of the light source under the hollow backing plate is uneven, and the intermediate temperature of the light source is higher than the temperature at both ends, which causes the liquid crystal panel to be excessively concentrated in the corner stress, which is disadvantageous for the long-term of the liquid crystal panel. use.
  • the technical problem to be solved by the present invention is to provide a kind of reinforced corner heat dissipation for the defects that the liquid crystal panel is too concentrated in the corner portion due to uneven temperature distribution of the hollow back light source in the prior art and thus affects the life of the liquid crystal panel.
  • the effect is thereby alleviating stress concentration and thus protecting the back sheet of the liquid crystal panel and the liquid crystal display device using the same.
  • a back sheet comprising a sheet metal member having a hollow structure and a heat dissipating aluminum extrusion connected to an end of the sheet metal member, the heat dissipating aluminum extrusion comprising installation a lateral light source connecting portion having a light source and a sheet metal member connecting portion connected to the lateral light source connecting portion, the sheet metal member connecting portion being in contact with a surface of the sheet metal member;
  • the heat dissipating aluminum extrusion further includes two heat dissipating extension portions provided at both ends of the sheet metal member connecting portion and extending in the longitudinal direction of the sheet metal member.
  • the heat dissipation extension extends along a surface thereof in the longitudinal direction of the sheet metal member.
  • the heat dissipation extension portion extends in the longitudinal direction of the sheet metal member by no more than 1/6 of the length of the sheet metal member.
  • the heat dissipation extension portion also extends to the hollow portion of the sheet metal member in the width direction of the sheet metal member.
  • the heat dissipation extension portion does not extend in the width direction of the sheet metal member by more than 1/4 of the width of the sheet metal member.
  • the heat dissipation extension portion is detachably coupled to the sheet metal member connection portion.
  • the heat dissipation portion has a thermal conductivity greater than a thermal conductivity of the sheet metal member connection portion.
  • the heat dissipation extension portion is integrally formed with the sheet metal member connection portion.
  • a liquid crystal display device is provided.
  • the invention can obtain the following beneficial effects: the heat dissipation extensions at both ends of the heat dissipation aluminum extrusion can extend along the length direction of the sheet metal member, so that the surface area of the heat dissipation aluminum extrusion portion is increased, and the heat dissipation effect of the corner portion is enhanced, thereby Improve the uniformity of heat dissipation of the light source mounted on the heat-dissipating aluminum; when applied to a liquid crystal display device, the heat dissipation is more uniform, which can reduce the stress concentration of the liquid crystal panel in the corner region, and is advantageous for extending the use of the liquid crystal panel. life.
  • the back plate of the invention has a simple structure and is convenient to assemble when applied to a liquid crystal module, and has remarkable practical value.
  • FIG. 1 is a schematic view of a backing plate having a hollow structure design in the prior art
  • FIG. 2a is a schematic structural view of a backboard according to Embodiment 1 of the present invention.
  • Figure 2b is a separate view of the heat dissipating aluminum extrusion contained in the backing plate of Figure 2a;
  • 3a is another schematic structural view of a backboard according to Embodiment 2 of the present invention.
  • Figure 3b is a separate view of the heat dissipating aluminum extrusion contained in the backing plate of Figure 3a;
  • FIG. 4 is a schematic view of a backlight module according to Embodiment 2 of the present invention.
  • FIG. 5 is a schematic diagram of a liquid crystal display device including the backlight module of FIG. 4.
  • FIG. 5 is a schematic diagram of a liquid crystal display device including the backlight module of FIG. 4.
  • the orientation of the present invention is defined as follows: the orientation of the backplane is followed by the orientation of the liquid crystal display panel.
  • the invention provides a backboard which can realize more uniform heat dissipation, and the heat dissipation aluminum extrusion of the backboard has a heat dissipation extension extending along the length direction of the sheet metal member, which can more effectively generate the existing light source.
  • the heat concentrated in the corner region is well dissipated, thereby alleviating the excessive concentration of the liquid crystal panel at the corner.
  • the back sheet of the present invention will be described in detail below.
  • the back sheet 1 includes a sheet metal member 11 having a hollow configuration and a heat dissipating aluminum extrusion 12 connected to one end of the sheet metal member 11.
  • the sheet metal member 11 has a "II" shape, and the heat dissipating aluminum extrusion 12 is attached to the end regions of the two long sides of the sheet metal member 11.
  • the hollow structure is designed such that the heat generated by the light source 2 corresponding to the hollow portion is quickly dissipated.
  • the sheet metal member 11 is connected to the heat dissipating aluminum extrusion 12 (if assembled in a liquid crystal display device, the corresponding The heat in the corner region of the liquid crystal display device is less dissipated.
  • the following is solved by the structural design of the heat-dissipating aluminum extrusion.
  • the heat dissipation aluminum extrusion 12 of the present embodiment includes a side light source connection portion 121 to which the light source 2 is mounted, and a sheet metal member connection portion 122 connected to the side light source connection portion 121.
  • the sheet metal member connecting portion 122 is connected to the end regions of the two long sides of the sheet metal member 11 and is in contact with the surface of the sheet metal member 11.
  • the sheet metal member connecting portion 122 has an elongated shape and is perpendicular to the long side (or the longitudinal direction) of the sheet metal member 11.
  • the heat dissipation aluminum extrusion 12 further includes two heat dissipation extension portions 123a provided at both ends of the sheet metal member connection portion 122 and extending in the longitudinal direction of the sheet metal member 11.
  • the heat dissipation extending portion 123a extends along the surface of the sheet metal member 11 in the longitudinal direction of the sheet metal member 11 and is in contact with the surface.
  • the heat dissipation extension portion 123a increases the effective heat dissipation area for heat dissipation at the junction of the sheet metal member 11 and the heat dissipation aluminum extrusion 12, so that the heat in the region can be dissipated more quickly, so that the back plate of the entire hollow design has a more uniform heat dissipation effect. .
  • the distance extending from the heat dissipation extension portion 123a in the above-described longitudinal direction should not exceed 1/6 of the length of the sheet metal member.
  • the heat dissipation extension portion 123a and the sheet metal member connection portion 122 of the embodiment are separate components, and the two are detachably connected.
  • the specific connection manner includes, but is not limited to, a connection manner such as snapping, screwing or glue bonding.
  • the thermal conductivity of the heat dissipation extension portion 123a is greater than the thermal conductivity of the sheet metal member connection portion 122, so that the heat generated by the light source can be transmitted faster through the heat dissipation extension portion 123a; as shown in FIG. 2b, along the crucible
  • the heat dissipating extension portion 123a derived from the surface of the gold member 11 can contact more hollow portions, thereby effectively dissipating heat.
  • the back sheet 1 includes a sheet metal member 11 having a hollow structure and a heat dissipating aluminum extrusion 12 connected to both ends of the sheet metal member 11.
  • the connection between the sheet metal member 11 and the heat-dissipating aluminum extrusion 12 is the same as that of the first embodiment, that is, the heat-dissipating aluminum extrusion 12 is connected to the end portions of the two long sides of the sheet metal member 11, but is provided by the heat-dissipating aluminum on both ends.
  • Light source so this embodiment is double-sided light.
  • the main difference between this embodiment and the embodiment 1 is embodied in the structural design of the heat dissipation aluminum extrusion 12.
  • the heat dissipation aluminum extrusion 12 includes a side light source connection portion 121 to which the light source 2 is mounted, and a sheet metal member connection portion 122 connected to the side light source connection portion 121.
  • the sheet metal member connecting portion 122 is connected to the end portions of the two long sides of the sheet metal member 11 and is in contact with the surface of the sheet metal member 11.
  • the sheet metal member connecting portion 122 is also elongated and perpendicular to the long side of the sheet metal member 11 and perpendicular to the side light source connecting portion 121.
  • the heat dissipation aluminum extrusion 12 further includes a heat dissipation extension portion 123b provided at an end region of the sheet metal member connection portion 122.
  • the heat dissipation extending portion 123b extends not only in the longitudinal direction of the sheet metal member 11, but also in the width direction of the sheet metal member 11 to the hollow portion of the sheet metal member 11, and covers a hollow portion of a part of the sheet metal member 11 (Fig. 3b) ).
  • the heat dissipation extension portion 123b of this embodiment is integrally formed with the sheet metal member connection portion 122, and thus has the same thermal conductivity.
  • the heat dissipation extension portion 123b is advantageous not only for the heat dissipation area for heat dissipation at the junction of the sheet metal member 11 and the heat dissipation aluminum extrusion 12, but also for the heat dissipation, and the heat dissipation extension portion 123b covering the hollow portion is in direct contact with the air.
  • the heat dissipation process is easier to implement, and the heat dissipation effect in the area can be greatly improved, so that the heat dissipation of the back plate of the entire hollow design is more uniform.
  • the heat dissipation extending portion 123b does not easily cover the hollow portion of the sheet metal member 11 excessively.
  • the present invention limits the distance that the heat dissipation extension portion 123b extends in the width direction of the sheet metal member 11 to not more than 1/4 of the width of the sheet metal member 11, in order to simultaneously utilize the original hollow design and the heat dissipation extension design of the present invention.
  • the heat dissipation extensions 123b can have a variety of different shape designs, such as the trapezoidal shape shown in Figure 3b.
  • the shape may also be rectangular (Fig. 3d), semi-circular or other geometric shape. It should be noted, however, that the heat dissipation extension should not extend beyond the edge defined by the sheet metal member 11 for ease of assembly.
  • FIG. 4 it is a schematic diagram of a backlight module including the backplane of Embodiment 2 of the present invention.
  • the backlight module 400 includes a back plate 1 and an optical film 3, a light guide plate 4 and a reflection sheet 5 which are disposed on the back plate 1 in order from top to bottom.
  • the light guide plate 4 has a light-emitting top surface 41 and a light-emitting top surface.
  • the face 41 is adjacent to the light incident side 42.
  • the back plate 1 is the structure described in detail in Embodiment 2, and includes a sheet metal member 11 and a heat dissipating aluminum extrusion 12, and the light source mounted on the heat dissipating aluminum extrusion 12 is located at the lateral light source connecting portion 121 of the heat dissipating aluminum extrusion 12 and the light entering the light. Between the sides 41.
  • the specific structure of the backing plate 1, in particular the structure of the heat-dissipating aluminum extrusion 12, will not be described in detail here.
  • the present invention also provides a liquid crystal display device (FIG. 5) comprising a liquid crystal display panel and a backlight module located behind the liquid crystal display panel, wherein the backlight module has the structure shown in FIG. Since the heat-dissipating aluminum extrusion having the above-mentioned structural design can enhance the heat dissipation effect in the corner region and improve the heat dissipation uniformity of the entire back plate, it can ensure that it provides a good illumination effect for the liquid crystal display panel, and finally improves the display effect of the liquid crystal display device.

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

Abstract

属于液晶显示技术领域，并公开了一种背板（1），其包含具有镂空构造的钣金构件（11）和与钣金构件（11）的端部连接的散热铝挤（12）；散热铝挤（12）包含安装有光源（2）的侧向光源连接部（121）和连接至侧向光源连接部（121）的钣金构件连接部（122），钣金构件连接部（122）与钣金构件（11）的表面相接触；其中，散热铝挤（12）还包含分别设于钣金构件连接部（122）的两端、且在钣金构件（11）的长度方向上延伸的两个散热延伸部（123a，123b）。散热铝挤（12）的两端所具有的散热延伸部（123a，123b）可以沿钣金构件（11）的长度方向延伸，使得角部区域散热效果增强，因而可改善散热铝挤（12）上安装的光源（2）散热的均匀性；当将其应用于液晶显示装置时，其可减轻液晶面板在角部区域的应力集中程度，有利于延长液晶面板的使用寿命。

Description

一种背板及使用其的背光模组和液晶显示装置 技术领域
本发明属于液晶显示技术领域，并涉及一种具有镂空结构设计的背板。更具体地，本发明涉及一种散热效果改善的上述背板及具有该背板的背光模组和液晶显示装置。
背景技术
现有的液晶显示装置包含前框、液晶显示面板、胶框、光学膜片、导光板、光源和背板等结构部件。其中背板采用镂空结构设计（图1），有助于减轻整个模组的重量、节约成本；同时这种镂空设计的背板也可使光源发光所产生的热量及时散失。然而，虽然镂空设计可以改善散热效果，但镂空背板下光源温度分布不均，光源中间温度比两端温度高，导致液晶面板在角部应力出现过于集中的情况，这不利于液晶面板的长期使用。
发明内容
本发明要解决的技术问题在于，针对现有技术中镂空背板光源温度分布不均而导致的液晶面板在角部应力过于集中并因此影响液晶面板寿命的缺陷，提供一种可增强角部散热效果从而缓解应力集中并因此保护液晶面板的背板及使用其的液晶显示装置。
本发明要解决的技术问题通过以下技术方案得以实现：一种背板，包含具有镂空构造的钣金构件和与所述钣金构件的端部连接的散热铝挤，所述散热铝挤包含安装有光源的侧向光源连接部和连接至所述侧向光源连接部的钣金构件连接部，所述钣金构件连接部与所述钣金构件的表面相接触；
所述散热铝挤还包含设于所述钣金构件连接部的两端、且在所述钣金构件的长度方向上延伸的两个散热延伸部。
在上述背板中，所述散热延伸部在所述钣金构件的长度方向上沿其表面延伸。
在上述背板中，所述散热延伸部在所述钣金构件的长度方向上延伸的距离不超过所述钣金构件的长度的1/6。
在上述背板中，所述散热延伸部还在所述钣金构件的宽度方向上延伸到所述钣金构件的镂空部分。
在上述背板中，所述散热延伸部在所述钣金构件的宽度方向上延伸的距离不超过所述钣金构件的宽度的1/4。
在上述背板中，所述散热延伸部与所述钣金构件连接部可拆卸连接。
在上述背板中，所述散热延伸部的热导率大于所述钣金构件连接部的热导率。
在上述背板中，所述散热延伸部与所述钣金构件连接部一体成型。
根据本发明的另一方面，提供一种液晶显示装置。
实施本发明可以获得以下有益效果：散热铝挤的两端所具有的散热延伸部可以沿钣金构件的长度方向延伸，使得散热铝挤角部散热的表面积增加，角部散热效果增强，因而可改善散热铝挤上安装的光源散热的均匀性；当将其应用于液晶显示装置时，由于散热更为均匀，其可减轻液晶面板在角部区域的应力集中程度，有利于延长液晶面板的使用寿命。本发明的背板结构简单且应用于液晶模组时装配方便，实用价值显著。
附图说明
以下将结合附图和具体实施例对本发明做进一步详细说明。附图中：
图1是现有技术中具有镂空结构设计的背板的示意图；
图2a是根据本发明实施例1的背板的结构示意图；
图2b是图2a中背板所包含的散热铝挤的单独视图；
图3a是根据本发明实施例2的背板的另一结构示意图；
图3b是图3a中背板所包含的散热铝挤的单独视图；
图4是采用根据本发明实施例2的背光模组的示意图；以及
图5是包含图4的背光模组的液晶显示装置的示意图。
具体实施方式
为使本发明的目的、技术方案和效果更清楚明白，以下将结合附图和具体实施例对本发明做进一步详细说明。应该理解的是，以下实施例仅用以解释本发明，而不对本发明做任何限制。
在进行详细说明之前，对本发明的方位进行如下定义：以背板所在方位为后，而以液晶显示面板所在方位为前。
本发明提供了一种可实现更为均匀的散热的背板，该背板的散热铝挤具有沿钣金构件的长度方向延伸的散热延伸部，可更加有效地使光源所产生的、现有技术中汇聚在角部区域的热量得以良好散失，从而减轻液晶面板在角部应力过于集中的状况。以下对本发明的背板进行详细说明。
实施例1：
参考图2a-2b，其所示为本发明所提供的一种类型的背板1及具体的散热铝挤12。该背板1包含具有镂空构造的钣金构件11和与钣金构件11的其中一个端部连接的散热铝挤12。由图可知，钣金构件11呈“Ⅱ”字型，散热铝挤12则连接在钣金构件11两条长边的端部区域上。镂空构造的设计可使得与镂空对应部分的光源2所产生的热量迅速散失，相比之下，钣金构件11与散热铝挤12连接处（若组装在液晶显示装置中，则对应为上述提及的液晶显示装置的角部区域）的热量则散失较慢。以下通过散热铝挤的结构设计解决这一问题。
本实施例的散热铝挤12包含安装有光源2的侧向光源连接部121和连接至侧向光源连接部121的钣金构件连接部122。该实施例因为仅在一侧的散热铝挤12上设置光源，因此为单侧入光。钣金构件连接部122连接在钣金构件11两条长边的端部区域上，并与钣金构件11的表面相接触。此处的钣金构件连接部122呈长条形，且与钣金构件11的长边（或长度方向）垂直。为增强角部区域的散热，散热铝挤12还包含设于钣金构件连接部122的两端、且沿钣金构件11的长度方向延伸的两个散热延伸部123a。该实施例中，散热延伸部123a在钣金构件11的长度方向上沿钣金构件11的表面延伸，并与该表面相接触。散热延伸部123a使得钣金构件11与散热铝挤12连接处用于散热的有效散热面积增加，可使该区域内的热量更快散失，从而使整个镂空设计的背板具有更均匀的散热效果。考虑到散热的有效性，散热延伸部123a在上述长度方向上延伸的距离应不超过钣金构件的长度的1/6。
优选地，该实施例的散热延伸部123a与钣金构件连接部122为单独的组件，两者呈可拆卸连接，具体连接方式包含但不限于卡接、螺接或胶接等连接方式。更加有利的是，散热延伸部123a的热导率大于钣金构件连接部122的热导率，这样光源所产生的热量可更快通过散热延伸部123a传递出来；如图2b所示，沿钣金构件11的表面衍生的该散热延伸部123a可接触更多的镂空部分，进而有效使热量散失。
实施例2：
参考图3a-3b，其所示为本发明所提供的另一类型的背板1及具体的散热铝挤12。该背板1包含具有镂空构造的钣金构件11和与钣金构件11的两端连接的散热铝挤12。钣金构件11和散热铝挤12的连接设置与实施例1相同，即散热铝挤12连接在钣金构件11两条长边的端部区域上，但由于在两端的散热铝挤上均设置光源，因此本实施例为双侧入光。本实施例与实施例1的主要区别体现在散热铝挤12的结构设计上。
散热铝挤12包含安装有光源2的侧向光源连接部121和连接至侧向光源连接部121的钣金构件连接部122。其中，钣金构件连接部122连接在钣金构件11两条长边的端部区域上，并与钣金构件11的表面相接触。此处的钣金构件连接部122同样呈长条形，且与钣金构件11的长边垂直、与侧向光源连接部121垂直。此处，散热铝挤12还包含设于钣金构件连接部122的端部区域的散热延伸部123b。该散热延伸部123b不仅在钣金构件11的长度方向上延伸，而且在钣金构件11的宽度方向上延伸到钣金构件11的镂空部分，并覆盖一部分钣金构件11的镂空部分（图3b）。该实施例的散热延伸部123b与钣金构件连接部122一体成型，因此具有相同的热导率。此时，散热延伸部123b不仅因其使得钣金构件11与散热铝挤12连接处用于散热的有效散热面积增加而有利于散热，而且覆盖了镂空部分的散热延伸部123b由于与空气直接接触而使得散热过程更易实施，同样可极大程度地改善该区域内的散热效果，从而使整个镂空设计的背板散热更均匀。
为避免影响侧向光源连接部121中间区域内光源的散热效果，散热延伸部123b不易过多覆盖钣金构件11的镂空部分。本发明将散热延伸部123b在钣金构件11的宽度方向上延伸的距离限定为不超过钣金构件11宽度的1/4，,以期同时利用原有镂空设计和本发明的散热延伸设计。
在图3b所示的视图方向上中，散热延伸部123b可具有多种不同的形状设计，例如图3b所示的梯形形状。例如但不限于，其形状也可为矩形（图3d）、半圆形或其他几何形状。但应注意，为便于组装该散热延伸部不应超出钣金构件11所限定的边缘。
如图4所示，其为包含本发明实施例2的背板的背光模组的示意图。该背光模组400包含背板1，以及由上到下依次设置在背板1上的光学膜片3、导光板4和反射片5，该导光板4具有一出光顶面41及与出光顶面41邻接的入光侧面42。背板1为实施例2中所详细描述的结构，包含钣金构件11和散热铝挤12，安装在散热铝挤12上的光源则位于散热铝挤12的侧向光源连接部121与入光侧面41之间。此处不再对背板1的具体结构、尤其散热铝挤的12结构做详细说明。
另外，本发明还提供一种液晶显示装置（图5），其包含液晶显示面板以及位于该液晶显示面板后方的背光模组，此处的背光模组具有图4所示的结构。由于具有上述结构设计的散热铝挤可在角部区域增强散热效果并改善整个背板的散热均匀性，因此可确保其为液晶显示面板提供良好的照明效果，最终提高液晶显示装置的显示效果。

Claims (10)

  1. 一种背板，包含具有镂空构造的钣金构件和与所述钣金构件的端部连接的散热铝挤，所述散热铝挤包含安装有光源的侧向光源连接部和连接至所述侧向光源连接部的钣金构件连接部，所述钣金构件连接部与所述钣金构件的表面相接触；其中，
    所述散热铝挤还包含分别设于所述钣金构件连接部的两端、且在所述钣金构件的长度方向上延伸的两个散热延伸部。
  2. 根据权利要求1所述的背板，其中，所述散热延伸部在所述钣金构件的长度方向上沿其表面延伸。
  3. 根据权利要求2所述的背板，其中，所述散热延伸部在所述钣金构件的长度方向上延伸的距离不超过所述钣金构件（11）的长度的1/6。
  4. 根据权利要求1所述的背板，其中，所述散热延伸部还在所述钣金构件的宽度方向上延伸到所述钣金构件的镂空部分。
  5. 根据权利要求4所述的背板，其中，所述散热延伸部在所述钣金构件的宽度方向上延伸的距离不超过所述钣金构件的宽度的1/4。
  6. 根据权利要求1所述的背板，其中，所述散热延伸部与所述钣金构件连接部可拆卸连接。
  7. 根据权利要求6所述的背板，其中，所述散热延伸部的热导率大于所述钣金构件连接部的热导率。
  8. 根据权利要求1所述的背板（1），其中，所述散热延伸部与所述钣金构件连接部一体成型。
  9. 一种背光模组，包含：背板，以及由上到下依次设置在所述背板上的光学膜片、导光板和反射片，所述导光板具有一出光顶面及与所述出光顶面邻接的入光侧面；
    所述背包含具有镂空构造的钣金构件和与所述钣金构件的端部连接的散热铝挤，所述散热铝挤包含安装有光源的侧向光源连接部和连接至所述侧向光源连接部的钣金构件连接部，所述钣金构件连接部与所述钣金构件的表面相接触；所述光源位于所述侧向光源连接部与所述入光侧面之间；其中，所述散热铝挤还包含分别设于所述钣金构件连接部的两端、且在所述钣金构件的长度方向上延伸的两个散热延伸部。
  10. 一种液晶显示装置，包含包括液晶显示面板，其中，所述液晶显示装置还包含权利要求9的背光模组。
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