WO2017080148A1 - 一种背光模组及液晶显示设备 - Google Patents

一种背光模组及液晶显示设备 Download PDF

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Publication number
WO2017080148A1
WO2017080148A1 PCT/CN2016/081919 CN2016081919W WO2017080148A1 WO 2017080148 A1 WO2017080148 A1 WO 2017080148A1 CN 2016081919 W CN2016081919 W CN 2016081919W WO 2017080148 A1 WO2017080148 A1 WO 2017080148A1
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WIPO (PCT)
Prior art keywords
liquid crystal
backlight module
led lamp
screw
crystal display
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/CN2016/081919
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English (en)
French (fr)
Inventor
付常佳
叶芳岱
张金南
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.)
Le Holdings Beijing Co Ltd
Leshi Zhixin Electronic Technology Tianjin Co Ltd
Original Assignee
Le Holdings Beijing Co Ltd
Leshi Zhixin Electronic Technology Tianjin Co Ltd
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Application filed by Le Holdings Beijing Co Ltd, Leshi Zhixin Electronic Technology Tianjin Co Ltd filed Critical Le Holdings Beijing Co Ltd
Priority to US15/232,394 priority Critical patent/US20170139102A1/en
Publication of WO2017080148A1 publication Critical patent/WO2017080148A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V21/00—Supporting, suspending, or attaching arrangements for lighting devices; Hand grips
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • 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

Definitions

  • the present invention relates to the field of display technologies, and in particular, to a backlight module and a liquid crystal display device.
  • a backlight module of a liquid crystal display device generally uses an LED (light-emitting diode, LED for short) as a light source. According to the distribution position of the light source, the backlight module can be divided into a direct-lighting type and a side-input type. .
  • LED light-emitting diode
  • the main structure of the side-lit backlight module includes: a backing plate 11 having an accommodating space, and a reflective sheet 12 and a guide placed in the accommodating space of the backing plate 11 and sequentially disposed.
  • the light plate 13 and the optical film 14 are located between the side wall of the back plate 11 and the light incident end face of the light guide plate 13 (light-emitting diode), and are located above the optical film 14
  • a plastic frame 16 assembled with the back plate 11.
  • the main structure of the liquid crystal display device further includes a liquid crystal panel 17 and a front frame 18, wherein the liquid crystal panel 17 is assembled on the front side of the backlight module, and the front frame 18 is from the front side of the liquid crystal panel 17 and the backlight module.
  • the assembly is assembled. Specifically, the side wall of the front frame 18 and the side wall of the plastic frame 16 are screwed to the side wall of the back plate 11 by screws 19 .
  • the above prior art has the drawback that when the liquid crystal display device is illuminated, the LED on the LED lamp group 15 generates a large amount of heat, and the temperature rise of the portion of the back plate 11 near the LED lamp group 15 is relatively high, thereby making the back plate
  • the temperature rise of the 11-thread-locked screw 19 is also relatively high. Since such screws are usually exposed on the surface of the liquid crystal display device, if the user accidentally touches it, it may cause discomfort or even burns.
  • the invention provides a backlight module and a liquid crystal display device to reduce the temperature rise of the bare screw on the surface of the liquid crystal display device.
  • the backlight module provided by the invention comprises a backboard, a light guide plate and an LED lamp set, wherein the backboard has An accommodating space, the light guide plate is located in the accommodating space, the LED light group is located between a side wall of the back plate and a light incident end surface of the light guide plate, the back plate and the LED lamp The adjacent side walls of the group have a vacant protrusion, and the escaping protrusion is provided with a screw hole for screwing with the front frame.
  • the escaping protrusion is a trapezoidal escaping protrusion, or the escaping protrusion is disconnected from a portion of the backboard sidewall except the sash protrusion.
  • the cutout has a symmetrical structure with respect to the screw hole.
  • the LED lamp set includes a connected heat sink and an LED light bar, and a bottom wall of the back plate is located at a portion between the heat dissipation plate and the cutout to have a hole.
  • the air vacant hole is located below the screw hole and the opposite area of the LED light group.
  • the size of the cutout hole along the length direction of the LED lamp group is not less than three times the diameter of the screw hole.
  • the heat dissipation plate comprises an L-shaped heat dissipation plate or a flat plate heat dissipation plate.
  • the side wall adjacent to the LED lamp group of the back plate has a vacant protrusion, and the vacant protrusion is provided with a screw hole for screwing with the front frame, and the liquid crystal display including the backlight module After the device is illuminated, since the screw in the screw hole and the LED lamp group have a large space to avoid the air, the heat conduction between the two can be greatly reduced, thereby reducing the temperature rise of the screw, thereby improving the user experience.
  • the present invention further provides a liquid crystal display device, comprising the backlight module according to any one of the preceding aspects, and the liquid crystal panel, the front frame and the screw, wherein the liquid crystal panel is assembled on the front side of the backlight module.
  • the front frame is assembled on the front side of the backlight module and the liquid crystal panel, and the screws are locked through the side walls of the front frame and the screw holes on the cutouts of the back plate.
  • the screw is a countersunk screw
  • the screw hole is a countersunk screw hole
  • the liquid crystal display device comprises a liquid crystal television, a liquid crystal display, and a liquid crystal screen of the mobile terminal.
  • the liquid crystal display device of the present invention After the liquid crystal display device of the present invention is illuminated, since the screws in the screw hole and the LED lamp group have a large space for avoiding air, the heat conduction between the two can be greatly reduced, thereby reducing the temperature rise of the screw, thereby improving the user experience.
  • FIG. 1 is a schematic longitudinal cross-sectional view of a liquid crystal display device of the prior art
  • FIG. 2 is a schematic transverse cross-sectional view showing a combination of a backlight module and a front frame according to a first embodiment of the present invention
  • FIG. 3 is a schematic transverse cross-sectional view showing a combination of a backlight module and a front frame according to a second embodiment of the present invention
  • FIG. 4 is a schematic transverse cross-sectional view showing a combination of a backlight module and a front frame according to a third embodiment of the present invention
  • FIG. 5 is a schematic longitudinal cross-sectional view showing a combination of a backlight module and a front frame according to a third embodiment of the present invention.
  • FIG. 6 is a schematic transverse cross-sectional view showing a combination of a backlight module and a front frame according to a fourth embodiment of the present invention.
  • FIG. 7 is a schematic transverse cross-sectional view showing a combination of a backlight module and a front frame according to a fifth embodiment of the present invention.
  • 11-back plate 12-reflecting sheet; 13-light guide plate; 14-optical diaphragm; 15-LED lamp group; 16-plastic frame;
  • 51-back plate 52-reflecting sheet; 53-light guide plate; 54-optical diaphragm; 55-LED lamp group;
  • 511-avoidance protrusion 551-heat dissipation plate; 552-LED light bar; 512-avoidance hole; 56-plastic frame;
  • the backlight module provided by the embodiment of the present invention includes a back plate 51, a light guide plate (not shown in the drawing, referring to the light guide plate 53 shown in FIG. 5), and an LED lamp group 55.
  • the back plate 51 has The accommodating space is defined by four side walls and a bottom wall of the back plate 51.
  • the light guide plate is located in the accommodating space, and the LED lamp group 55 is located at the side wall of the back plate 51 and the light incident end surface of the light guide plate.
  • the side wall adjacent to the LED lamp group 55 has a cutout protrusion 511, and the cutout protrusion 511 is provided with a screw hole for screwing with the front frame 58 (not shown in the drawing, that is, corresponding Set the position of the screw 59).
  • the backlight module provided by the embodiment of the present invention is a side In the light-in backlight module, the light emitted by the LEDs on the LED lamp group 55 is incident into the light guide plate from the light incident end surface of the light guide plate.
  • the LED lamp group 55 includes a heat sink 551 and an LED strip 552.
  • the specific type of the heat sink 551 is not limited. For example, it may be an L-shaped heat sink or a flat heat sink.
  • the heat sink preferably has better thermal conductivity and lighter weight.
  • Aluminum material, LED light bar 552 is provided with a plurality of LEDs.
  • the structure of the backlight module generally further includes a reflective sheet 52, an optical film 54, a plastic frame 56, and the like, as shown in FIG.
  • the side wall of the back plate 51 adjacent to the LED lamp group 55 has a cutout protrusion 511, and the avoidance protrusion 511 is provided with a screw hole for screwing with the front frame 58.
  • the avoidance protrusion 511 is a trapezoidal avoidance protrusion.
  • the shape is designed to meet the structural strength requirement of the back plate 51, and can be formed by a stamping process of the back plate.
  • the vacant protrusion 511 has a symmetrical structure with respect to the screw hole, so that the heat conduction on both sides of the screw hole can be made substantially equal, so that the above advantageous effects of the present invention are more apparent.
  • the cutout protrusion 511 is disconnected from the other portions of the side wall of the back plate 51, and the effect of lowering the temperature rise of the screw can also be achieved.
  • the bottom wall of the back plate 51 is located at a portion between the heat dissipation plate 551 and the cutout 511, and has a cutout hole 512.
  • the design of the cutout 512 can reduce the heat conduction area between the screw hole and the LED lamp group 55, thereby further reducing the temperature rise of the screw 59.
  • the avoidance hole 512 is located below the area where the screw hole is opposite to the LED lamp group 55. Since the bottom wall of the back plate 51 is located at a portion of the screw hole below the opposite portion of the LED lamp group 55, the heat conduction rate is the shortest, and the heat conduction rate is the highest.
  • the opening of the cutout 512 in this position can greatly reduce the heat conduction between the two, thereby more effectively reducing the temperature rise of the screw 59.
  • the size of the hollow hole 512 along the length direction of the LED lamp group 55 is preferably not less than three times the screw hole diameter to reduce heat conduction to a large extent, but in consideration of the structural strength of the back plate 51, the cutout hole 512 is along the LED lamp group 55.
  • the dimension in the length direction is also not designed to be too large, and can be designed in combination with the overall structural size and strength requirements of the backing plate 51. It is to be noted that the number of the escaping holes 512 is not limited to one, and the structure shown in FIG. 6 may be employed, and a plurality of escaping holes 512 may be provided as long as the structural strength can be satisfied.
  • the screw 59 is threaded through the side wall of the front frame 58 and the side wall of the plastic frame 56 is threadedly engaged with the side wall of the back plate 51.
  • the plastic frame 56 and the back plate 51 After the assembly, the cutout 511 is not blocked by the side wall of the frame, so that the screw 59 is directly threaded through the side wall of the front frame 58 and screwed to the screw hole on the cutout 511.
  • the embodiment of the present invention further provides a liquid crystal display device, including the backlight module according to any of the foregoing technical solutions, and a liquid crystal panel 57, a front frame 58 and a screw 59, wherein: the liquid crystal panel 57 group
  • the front frame 58 is disposed on the front side of the backlight module and the liquid crystal panel 57.
  • the screw 59 passes through the side wall of the front frame 58, the side wall of the plastic frame 56, and the back plate 51. The screw holes on the projection 511 are locked.
  • the specific type of display device is not limited, and may be, for example, a liquid crystal television, a liquid crystal display, and a liquid crystal screen of a mobile terminal, and the like.
  • the screw can also be directly connected to the screw hole on the avoidance protrusion of the back plate through the side wall of the front frame.
  • the non-light-incident side walls of the front and back panels may also be connected by screws, because the non-light-emitting side sidewalls of the back panel are separated from the LED lights.
  • the strip is far away, and the temperature rise caused by the LED is small. Therefore, it is not necessary to adopt a design similar to the foregoing, and a conventional continuous planar structure can be used.
  • the screw hole screw 59 and the LED lamp group 55 have a large space avoidance interval, the heat conduction between the two can be greatly reduced, thereby reducing the temperature rise of the screw 59. To enhance the user experience.
  • the screw 59 is a countersunk screw
  • the screw hole is a countersunk screw hole.
  • the nut of the countersunk screw does not exceed the side wall surface of the front frame 58, so that it is not easy to see from the appearance of the liquid crystal display device, so that the appearance of the display device is more beautiful, and the nut of the countersunk screw is not suitable for being touched by the user. To, thus further improving the user experience.

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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)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
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Abstract

一种背光模组及液晶显示设备。背光模组包括背板（51）、导光板（53）和LED灯组（55），背板（51）具有容置空间，导光板（53）位于容置空间内，LED灯组（55）位于背板（51）的侧壁和导光板（53）的入光端面之间，背板（51）与LED灯组（55）相邻的侧壁具有避空凸起（511），避空凸起（511）上设置有用于与前框（58）螺纹锁接的螺钉孔。包含背光模组的液晶显示设备被点亮后，由于螺钉孔内螺钉（59）与LED灯组（55）具有较大的避空间隔，因此可以大大减少两者之间的热传导，从而降低螺钉（59）的温升，进而改善用户体验。

Description

一种背光模组及液晶显示设备
本申请要求在2015年11月13日提交中国专利局、申请号为201510779856.8、发明名称为“一种背光模组及液晶显示设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及显示技术领域，特别是涉及一种背光模组及液晶显示设备。
背景技术
目前，液晶显示设备的背光模组普遍采用LED(light-emitting diode，发光二极管，简称LED)作为光源，根据光源的分布位置，背光模组可分为直下入光式和侧入光式两种。
如图1所示，液晶显示设备中，侧入光式背光模组的主要结构包括：具有容置空间的背板11，位于背板11的容置空间内并顺序放置的反射片12、导光板13和光学膜片14，位于背板11的侧壁与导光板13的入光端面之间的LED(light-emitting diode，发光二极管，简称LED)灯组15，以及位于光学膜片14上方且与背板11组配的胶框16。
除背光模组外，液晶显示设备的主要结构还包括液晶面板17和前框18，其中，液晶面板17组配于背光模组的前侧，前框18从液晶面板17的前侧与背光模组组配，具体的，采用螺钉19穿过前框18的侧壁、胶框16的侧壁与背板11的侧壁螺纹锁接。
上述现有技术存在的缺陷在于，液晶显示设备被点亮时，LED灯组15上的LED发热量较大，背板11靠近LED灯组15的部分温升也比较高，从而使得与背板11螺纹锁接的螺钉19的温升也比较高，由于这类螺钉通常裸露在液晶显示设备表面，如果用户不小心触碰到，可能会引起不适，甚至被烫伤。
发明内容
本发明提供了一种背光模组及液晶显示设备，以降低液晶显示设备表面裸露螺钉的温升。
本发明提供的背光模组，包括背板、导光板和LED灯组，所述背板具有 容置空间，所述导光板位于所述容置空间内，所述LED灯组位于所述背板的侧壁和所述导光板的入光端面之间，所述背板与所述LED灯组相邻的侧壁具有避空凸起，所述避空凸起上设置有用于与前框螺纹锁接的螺钉孔。
优选的，所述避空凸起为梯形避空凸起，或者所述避空凸起与所述背板侧壁除避空凸起之外的部分相断开。
优选的，所述避空凸起相对所述螺钉孔呈对称结构。
更优的，所述LED灯组包括相连接的散热板和LED灯条，所述背板的底壁位于散热板和避空凸起之间的部分具有避空孔。
进一步，所述避空孔位于螺钉孔与LED灯组相对区域的下方。
更优的，所述避空孔沿LED灯组长度方向的尺寸不小于三倍的螺钉孔直径。
可选的，所述散热板包括L形散热板或平板散热板。
在本发明技术方案中，背板与LED灯组相邻的侧壁具有避空凸起，避空凸起上设置有用于与前框螺纹锁接的螺钉孔，包含该背光模组的液晶显示设备被点亮后，由于螺钉孔内螺钉与LED灯组具有较大的避空间隔，因此可以大大减少两者之间的热传导，从而降低螺钉的温升，进而改善用户体验。
本发明还提供了一种液晶显示设备，包括根据前述任一技术方案所述的背光模组，以及液晶面板、前框和螺钉，其中：所述液晶面板组配于背光模组的前侧，所述前框组配于背光模组和液晶面板的前侧，所述螺钉穿过前框的侧壁与背板的避空凸起上的螺钉孔锁接。
优选的，所述螺钉为沉头螺钉，所述螺钉孔为沉头螺钉孔。
可选的，所述液晶显示设备包括液晶电视机、液晶显示器和移动终端的液晶屏。
本发明液晶显示设备被点亮后，由于螺钉孔内螺钉与LED灯组具有较大的避空间隔，因此可以大大减少两者之间的热传导，从而降低螺钉的温升，进而提升用户体验。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作一简单地介绍，显而易见地，下 面描述中的附图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。
图1为现有技术一液晶显示设备的纵向截面示意图；
图2为本发明第一实施例背光模组与前框组配的横向截面示意图；
图3为本发明第二实施例背光模组与前框组配的横向截面示意图；
图4为本发明第三实施例背光模组与前框组配的横向截面示意图；
图5为本发明第三实施例背光模组与前框组配的纵向截面示意图；
图6为本发明第四实施例背光模组与前框组配的横向截面示意图；
图7为本发明第五实施例背光模组与前框组配的横向截面示意图。
附图标记：
现有技术部分：
11-背板；12-反射片；13-导光板；14-光学膜片；15-LED灯组；16-胶框；
17-液晶面板；18-前框；19-螺钉。
本发明实施例部分：
51-背板；52-反射片；53-导光板；54-光学膜片；55-LED灯组；
511-避空凸起；551-散热板；552-LED灯条；512-避空孔；56-胶框；
57-液晶面板；58-前框；59-螺钉。
具体实施方式
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
如图2所示，本发明实施例提供的背光模组，包括背板51、导光板(图中未示出，可参考图5所示导光板53)和LED灯组55，背板51具有容置空间，该容置空间由背板51的四个侧壁和底壁围成，导光板位于容置空间内，LED灯组55位于背板51的侧壁和导光板的入光端面之间，背板51与LED灯组55相邻的侧壁具有避空凸起511，避空凸起511上设置有用于与前框58螺纹锁接的螺钉孔(图中未示出，即对应设置螺钉59的位置)。
根据LED灯组55的设置位置可知，本发明实施例提供的背光模组为侧 入光式背光模组，LED灯组55上LED发出的光从导光板的入光端面射入导光板内。LED灯组55包括相连接的散热板551和LED灯条552，散热板551的具体类型不限，例如可以为L形散热板或平板散热板，散热板优选采用导热性能较佳且质量较轻的铝材质，LED灯条552上设置有多颗LED。除上述结构件外，背光模组的结构通常还包括反射片52、光学膜片54、胶框56等等，可参考图5所示。
在本发明实施例的技术方案中，背板51与LED灯组55相邻的侧壁具有避空凸起511，避空凸起511上设置有用于与前框58螺纹锁接的螺钉孔，包含该背光模组的液晶显示设备被点亮后，由于螺钉孔内螺钉59与LED灯组55具有较大的避空间隔，因此可以大大减少两者之间的热传导，从而降低螺钉59的温升，减少用户误碰螺钉59时的不适感，改善用户体验。
请继续参照图2所示，避空凸起511为梯形避空凸起，该形状设计有利于满足背板51的结构强度需求，可以通过背板的冲压工艺成型。此外，避空凸起511相对螺钉孔呈对称结构，可以使得螺钉孔两侧的热传导基本相当，从而使得本发明的上述有益效果更加明显。如图3所示，在本发明的另一实施例中，避空凸起511与背板51侧壁的其它部分相断开，也可以起到较好的降低螺钉温升的效果。
请参照图4和图5所示实施例，背板51的底壁位于散热板551和避空凸起511之间的部分具有避空孔512。设计避空孔512可以减少螺钉孔处与LED灯组55之间的热传导面积，从而进一步降低螺钉59的温升。较佳的，避空孔512位于螺钉孔与LED灯组55相对区域的下方，由于背板51的底壁位于螺钉孔与LED灯组55相对区域下方的部分导热路径最短，导热速率最高，将避空孔512开设在此位置可以大大减少两者之间的热传导，从而更加有效的降低螺钉59的温升。避空孔512沿LED灯组55长度方向的尺寸优选不小于三倍的螺钉孔直径，以较大限度的减少热传导，但考虑到背板51的结构强度，避空孔512沿LED灯组55长度方向的尺寸也不宜设计的过大，可结合背板51的整体结构尺寸和强度要求来设计。值得一提的是，避空孔512的数量不限于一个，也可以采用图6所示的结构，设置多个避空孔512，只要能够满足结构强度即可。
图4和图5所示的实施例中，螺钉59穿过前框58的侧壁、胶框56的侧壁与背板51的侧壁螺纹锁接。在本发明的其它实施例中，胶框56与背板51 组配后，避空凸起511未被胶框的侧壁遮挡，因此，螺钉59穿过前框58的侧壁直接与避空凸起511上的螺钉孔螺纹锁接。
可参考图5所示，本发明实施例还提供了一种液晶显示设备，包括根据前述任一技术方案的背光模组，以及液晶面板57、前框58和螺钉59，其中：液晶面板57组配于背光模组的前侧，前框58组配于背光模组和液晶面板57的前侧，螺钉59穿过前框58的侧壁、胶框56的侧壁与背板51的避空凸起511上的螺钉孔锁接。
显示设备的具体类型不限，例如可以为液晶电视机、液晶显示器和移动终端的液晶屏，等等。如前所述，根据背光模组胶框的设计结构，螺钉也可穿过前框的侧壁直接与背板的避空凸起上的螺钉孔锁接。
在此值得一提的是，为实现前框与背板的可靠连接，前框与背板的非入光侧侧壁也可能通过螺钉连接，由于背板的非入光侧侧壁距离LED灯条较远，受LED影响导致的温升较小，因此，不必要采用类似前述的设计，采用常规的连续平面结构即可。
本发明实施例的液晶显示设备被点亮后，由于螺钉孔内螺钉59与LED灯组55具有较大的避空间隔，因此可以大大减少两者之间的热传导，从而降低螺钉59的温升，进而提升用户体验。
优选的，如图7所示，螺钉59采用沉头螺钉，，所述螺钉孔为沉头螺钉孔。沉头螺钉的螺帽不超出前框58的侧壁表面，这样从液晶显示设备的外观上不易看到，使得显示设备的外观更加美观，此外，沉头螺钉的螺帽也不宜被用户触碰到，从而进一步改善了用户体验。
最后应说明的是：以上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：其依然可以对前述各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各实施例技术方案的精神和范围。

Claims (10)

  1. 一种背光模组，包括背板、导光板和LED灯组，所述背板具有容置空间，所述导光板位于所述容置空间内，所述LED灯组位于所述背板的侧壁和所述导光板的入光端面之间，其特征在于：
    所述背板与所述LED灯组相邻的侧壁具有避空凸起，所述避空凸起上设置有用于与前框螺纹锁接的螺钉孔。
  2. 根据权利要求1所述的背光模组，其特征在于，所述避空凸起为梯形避空凸起，或者所述避空凸起与所述背板侧壁除避空凸起之外的部分相断开。
  3. 根据权利要求1所述的背光模组，其特征在于，所述避空凸起相对所述螺钉孔呈对称结构。
  4. 根据权利要求1～3任一项所述的背光模组，其特征在于，所述LED灯组包括相连接的散热板和LED灯条，所述背板的底壁位于散热板和避空凸起之间的部分具有避空孔。
  5. 根据权利要求4所述的背光模组，其特征在于，所述避空孔位于螺钉孔与LED灯组相对区域的下方。
  6. 根据权利要求5所述的背光模组，其特征在于，所述避空孔沿LED灯组长度方向的尺寸不小于三倍的螺钉孔直径。
  7. 根据权利要求4所述的背光模组，其特征在于，所述散热板包括L形散热板或平板散热板。
  8. 一种液晶显示设备，其特征在于，包括根据权利要求1～7任一项所述的背光模组，以及液晶面板、前框和螺钉，其中：
    所述液晶面板组配于背光模组的前侧，所述前框组配于背光模组和液晶面板的前侧，所述螺钉穿过前框的侧壁与背板的避空凸起上的螺钉孔锁接。
  9. 根据权利要求8所述的液晶显示设备，其特征在于，所述螺钉为沉头螺钉，所述螺钉孔为沉头螺钉孔。
  10. 根据权利要求8或9所述的液晶显示设备，其特征在于，所述液晶显示设备包括液晶电视机、液晶显示器和移动终端的液晶屏。
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