WO2016127453A1 - 一种背光模组 - Google Patents

一种背光模组 Download PDF

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Publication number
WO2016127453A1
WO2016127453A1 PCT/CN2015/073612 CN2015073612W WO2016127453A1 WO 2016127453 A1 WO2016127453 A1 WO 2016127453A1 CN 2015073612 W CN2015073612 W CN 2015073612W WO 2016127453 A1 WO2016127453 A1 WO 2016127453A1
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WIPO (PCT)
Prior art keywords
vertical portion
backlight module
hole
plastic frame
vertical
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Ceased
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PCT/CN2015/073612
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English (en)
French (fr)
Inventor
阙成文
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TCL China Star Optoelectronics Technology Co Ltd
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Shenzhen China Star Optoelectronics Technology Co Ltd
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Priority to US14/443,392 priority Critical patent/US9383507B1/en
Publication of WO2016127453A1 publication Critical patent/WO2016127453A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • 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
    • F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
    • F21V17/10—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening
    • F21V17/16—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening by deformation of parts; Snap action mounting
    • F21V17/164—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening by deformation of parts; Snap action mounting the parts being subjected to bending, e.g. snap joints
    • 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
    • G02F1/133602—Direct backlight
    • G02F1/133603—Direct backlight with LEDs

Definitions

  • the present invention relates to the field of display technologies, and in particular, to a backlight module.
  • a display device such as a liquid crystal display device, generally includes a display panel and a backlight module that provides backlighting for the display panel.
  • a backlight module that provides backlighting for the display panel.
  • the designer in order to reduce the width of the frame, the designer usually installs the plastic middle frame on the light-incident side directly on the heat sink, but since the heat sink is usually an aluminum extruded profile, other auxiliary fixed structures need to be added. The process is more complicated and costly.
  • one of the common fixing methods of the plastic middle frame 1 is: artificially downward (in the -Z direction) during assembly, an external force is applied to the plastic middle frame 1 to insert the heat sink 2 into the plastic middle frame 1 In the groove 1a, the plastic middle frame 1 is directly locked to the side wall of the heat sink 2 by a plurality of screws (not shown) to achieve the purpose of fixing the plastic middle frame 1.
  • the present invention provides a backlight module having a simple structure and good optical performance.
  • a backlight module includes a plastic frame, a heat dissipation plate, an LED light bar, a light guide plate and an optical film
  • the plastic frame includes a first horizontal portion and a first vertical portion
  • the heat dissipation plate includes a second level a portion and a second vertical portion
  • the plastic frame is provided with a first through hole penetrating the horizontal portion and the first vertical portion
  • the second vertical portion end is provided with an inwardly extending hook The second vertical portion abuts the first vertical portion, and the hook portion is engaged with the first horizontal portion.
  • the plastic frame further includes at least one second through hole opened in the first vertical portion, and the heat dissipation plate further includes a convex portion protruding from the outer wall of the second vertical portion, the convex portion Embedded in the second through hole.
  • the plastic frame further includes at least one notch groove opened in the first vertical portion, and the notch groove is disposed adjacent to the first through hole in a length direction of the first vertical portion.
  • Each of the first through holes is provided with one of the notch grooves on each side of the first through hole.
  • the upper surface of the second horizontal portion is provided with a heat conducting plate.
  • the one end of the first horizontal portion adjacent to the first through hole is a guiding slope.
  • the one end of the first horizontal portion adjacent to the first through hole is provided with a raised rib, and the hook portion is erected on the upper surface of the rib through the guiding inclined surface.
  • the backlight module further includes a fastener, and the fastener sequentially fixes the plastic frame and the heat dissipation plate through the first vertical portion and the second vertical portion.
  • the backlight module of the present invention has a first through hole penetrating the horizontal portion and the first vertical portion on the plastic frame, and an inwardly extending hook portion at the end of the second vertical portion of the plastic frame, the second The vertical portion is in close contact with the first vertical portion, and the hook portion is engaged with the first horizontal portion, and the plastic frame is well fixed on the heat dissipation plate, and the structure is simple and compact, thereby effectively preventing the occurrence of light leakage.
  • FIG. 1 is a schematic structural view of a conventional backlight module
  • FIG. 2 is a schematic structural view of a backlight module according to an embodiment of the present invention.
  • FIG. 3 is a schematic diagram of a plastic frame mounting structure according to an embodiment of the present invention.
  • the backlight module of the embodiment of the present invention includes: a plastic frame 10, a heat dissipation plate 20, an LED light bar 30, a light guide plate 40, and an optical film 50.
  • the plastic frame 10 includes a first horizontal portion 11 connected thereto.
  • the heat dissipation plate 20 includes a second horizontal portion 21 and a second vertical portion 22, and the plastic frame 10 is provided with a first through hole 13 penetrating the horizontal portion 11 and the first vertical portion 12, Two vertical sections 22 The end is provided with a hook portion 23 extending toward the inside of the backlight module, the second vertical portion 22 abuts the first vertical portion 12, and the hook portion 23 is engaged with the first horizontal portion 11.
  • the plastic frame 10 of the backlight module of the embodiment has a first through hole 13
  • the heat dissipation plate 20 has a hook portion 23 extending into the first through hole 13 , and the hook portion 23 is engaged with the first horizontal portion 11 . And overlapping the upper surface of the first horizontal portion 11.
  • the plastic frame 10 is pressed downwards, and the hook portion 23 of the heat dissipation plate 20 is inserted into the first through hole 13 of the plastic frame 10.
  • the plastic frame 10 is continuously pressed, and the hook portion 23 is overlapped.
  • the LED light bar 30, the light guide plate 40, and the optical film 50 are disposed in a space surrounded by the plastic frame 10 and the heat dissipation plate 20.
  • the first vertical portion 12 of the plastic frame 10 is further provided with at least one second through hole 14.
  • the outer wall of the second vertical portion 22 of the heat dissipation plate 20 is convexly provided with a convex portion 24, and the convex portion 24 is embedded in the first portion Inside the two through holes 14.
  • the plastic frame 10 and the heat dissipation plate 20 pass through the first through hole 13 through the hook portion 23 and overlap the upper surface of the first horizontal portion 11 on the one hand, and the convex portion 24 and the plastic frame of the side wall of the heat dissipation plate 20 on the other hand.
  • the protrusion 24 is engaged in the second through hole 14 of the first vertical portion 12 of the plastic frame 10 .
  • the combination of the bezel 10 and the heat sink 20 is more compact.
  • the first vertical portion 12 of the plastic frame 10 is provided with at least one notch groove 15 .
  • the notch groove 15 is disposed adjacent to the first through hole 13 in the longitudinal direction of the first vertical portion 12 to improve the glue.
  • the elasticity of the first vertical portion 12 of the frame 10 makes it easier to assemble the plastic frame 10 with the heat dissipation plate 20.
  • each of the first through holes 13 on the first vertical portion 12 is provided with a notch groove 15 on each side.
  • the reflective sheet 70 is attached to the lower surface of the light guide plate 40.
  • the upper surface of the second horizontal portion 21 is provided with a heat conducting plate 60 for better heat conduction from the light guide plate 40.
  • one end of the first horizontal portion 11 close to the first through hole 13 is an inclined guide slope 11S.
  • One end of the first horizontal portion 11 near the first through hole 13 is provided with a raised rib 16 , and the hook portion 23 is erected on the upper surface of the rib 16 through the guiding slope 11S, and the presence of the rib 16 improves the hook portion 23 Installation reliability.
  • the fastener 100 sequentially fixes the plastic frame 10 and the heat dissipation plate 20 through the first vertical portion 12 and the second vertical portion 22, so that the secondary positioning of the plastic frame 10 and the heat dissipation plate 20 is ensured.
  • the person can still be reliably fixed under the action of appropriate external force. Due to the presence of the hook portion 23 and the boss portion 24, when the fastener 100 is fixed by a screw, the frame 10 is not excessively deformed by the pressing of the fastener 100, and the frame is effectively suppressed.
  • the shape variable of 10 reduces the size variation of the opening of the plastic frame 10 relative to the heat dissipation plate 20, and reduces the probability of occurrence of light leakage problems.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (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)

Abstract

一种背光模组，包括胶框（10）、散热板（20）、LED灯条（30）、导光板（40）及光学膜片（50），胶框（10）包括相连的第一水平部分（11）和第一竖直部分（12），散热板（20）包括第二水平部分（21）和第二竖直部分（22），胶框（10）上设有贯穿第一水平部分（11）和第一竖直部分（12）的第一通孔（13），第二竖直部分（22）末端设有朝内延伸的卡勾部（23），第二竖直部分（22）紧贴第一竖直部分（12），且卡勾部（23）卡合于第一水平部分（11）。因此，背光模组的胶框（10）被很好地固定在散热板（20）上，所以结构简单而紧凑，有效地避免了漏光现象的产生。

Description

一种背光模组 技术领域
本发明涉及显示技术领域，尤其涉及一种背光模组。
背景技术
显示装置，如液晶显示装置，通常包括显示面板、为该显示面板提供背光的背光模组。现有的窄边框背光模块架构，为了减少其边框宽度，设计者通常将入光侧的塑胶中框直接安装在散热片上，但因为散热片常用为铝挤出型材，需要增加其他辅助的固定结构，其工艺较为复杂且成本较高。
如图1所示，目前该塑胶中框1常见的固定方式之一是：组装时人为的向下(图中-Z方向)对塑胶中框1施加外力，使散热片2插入塑胶中框1的凹槽1a中，然后通过多处的螺丝(图未示)直接将塑胶中框1锁附在散热片2侧壁上，以达成固定塑胶中框1的目的。但是，在人为操作时，其外力的施力力度很难实现均匀的控制，所以很容易导致塑胶中框1开口处安装尺寸偏差较大；并且，在锁入螺丝的过程中，因为零件加工尺寸精度的问题，塑胶中框1局部会出现或多或少的压迫变形，人为操作无法对塑胶中框1的变形现象进行抑制，使得塑胶中框1局部的开口尺寸变得更为难以控制，以至于该背光模块出现局部漏光的现象，从而影响背光性能。
发明内容
鉴于现有技术存在的不足，本发明提供了一种结构简单、光学性能好的背光模组。
为了实现上述的目的，本发明采用了如下的技术方案：
一种背光模组，包括胶框、散热板、LED灯条、导光板及光学膜片，所述胶框包括相连的第一水平部分和第一竖直部分，所述散热板包括第二水平部分和第二竖直部分，所述胶框上设有贯穿所述水平部分和所述第一竖直部分的第一通孔，所述第二竖直部分末端设有朝内延伸的卡勾部，所述第二竖直部分紧贴所述第一竖直部分，且所述卡勾部卡合于所述第一水平部分。
其中，所述胶框还包括第一竖直部分上开设的至少一个第二通孔，所述散热板还包括所述第二竖直部分的外壁凸设的凸起部，所述凸起部嵌设于所述第二通孔内。
其中，所述胶框还包括第一竖直部分上开设的至少一个缺口槽，所述缺口槽在所述第一竖直部分长度方向上与所述第一通孔相邻设置。
其中，每个所述第一通孔的两侧各设有一个所述缺口槽。
其中，所述第二水平部分上表面设有导热板。
其中，所述第一水平部分靠近所述第一通孔的一端为导向斜面。
其中，所述第一水平部分靠近所述第一通孔的一端设有凸起的筋条，所述卡勾部通过所述导向斜面搭设于所述筋条上表面。
其中，背光模组还包括紧固件，所述紧固件依次穿过所述第一竖直部分和所述第二竖直部分将所述胶框与所述散热板相对固定。
本发明的背光模组，在胶框上设有贯穿水平部分和第一竖直部分的第一通孔，在胶框的第二竖直部分末端设有朝内延伸的卡勾部，第二竖直部分紧贴第一竖直部分，且卡勾部卡合于第一水平部分，胶框被很好地固定在散热板上，结构简单而紧凑，有效地避免了漏光现象的产生。
附图说明
图1为现有背光模组的结构示意图
图2为本发明实施例的背光模组结构示意图。
图3为本发明实施例的胶框安装结构示意图。
具体实施方式
为了使本发明的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本发明进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。
参阅图2和图3，本发明实施例的背光模组包括：胶框10、散热板20、LED灯条30、导光板40及光学膜片50，胶框10包括相连的第一水平部分11和第一竖直部分12，散热板20包括第二水平部分21和第二竖直部分22，胶框10上设有贯穿水平部分11和第一竖直部分12的第一通孔13，第二竖直部分22末 端设有朝背光模组内延伸的卡勾部23，第二竖直部分22紧贴第一竖直部分12，且卡勾部23卡合于第一水平部分11。
本实施例的背光模组的胶框10具有第一通孔13，散热板20上具有伸入该第一通孔13的卡勾部23，该卡勾部23卡合于第一水平部分11并搭接在第一水平部分11的上表面。安装时，只需将胶框10朝下按压，使散热板20上的卡勾部23伸入胶框10的第一通孔13内，继续按压胶框10，卡勾部23即搭接在胶框10的第一水平部分11的上表面。
LED灯条30、导光板40及光学膜片50设于胶框10和散热板20围成的空间内。胶框10的第一竖直部分12上还开设有至少一个第二通孔14，散热板20的第二竖直部分22的外壁凸设有凸起部24，凸起部24嵌设于第二通孔14内。胶框10与散热板20一方面通过卡勾部23穿过第一通孔13并搭接在第一水平部分11上表面，另一方面，散热板20侧壁的凸起部24与胶框10的第二通孔14的配合，凸起部24卡设于胶框10的第一竖直部分12的第二通孔14内。胶框10与散热板20的结合方式更加紧凑。
进一步地，胶框10的第一竖直部分12上开设有至少一个缺口槽15，这里，缺口槽15在第一竖直部分12长度方向上与第一通孔13相邻设置，可以提高胶框10的第一竖直部分12的弹性，胶框10与散热板20组装更加容易。这里，第一竖直部分12上的每个第一通孔13的两侧各设有一个缺口槽15。
反射片70贴合于导光板40的下表面，同时，第二水平部分21上表面设有导热板60，可以更好地传导导光板40散发的热量。为了使卡勾部23更加精确、更加方便地与散热板20实现搭接，第一水平部分11靠近第一通孔13的一端为倾斜的导向斜面11S。第一水平部分11靠近第一通孔13的一端设有凸起的筋条16，卡勾部23通过导向斜面11S搭设于筋条16上表面，筋条16的存在提高了卡勾部23的安装可靠性。
同时，紧固件100依次穿过第一竖直部分12和第二竖直部分22将胶框10与散热板20相对固定，做到了胶框10与散热板20的二次定位，保证了二者在适当的外力作用下仍能可靠固定。由于卡勾部23与凸起部24的存在，当利用紧固件100如螺丝进行固定时，胶框10不会由于紧固件100的挤压而产生过大的形变，有效抑制了胶框10的形变量，降低了胶框10开口处相对散热板20的尺寸变异程度，降低了漏光问题发生的几率。
以上所述仅是本申请的具体实施方式，应当指出，对于本技术领域的普通 技术人员来说，在不脱离本申请原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本申请的保护范围。

Claims (18)

  1. 一种背光模组，其中，包括胶框、散热板、LED灯条、导光板及光学膜片，所述胶框包括相连的第一水平部分和第一竖直部分，所述散热板包括第二水平部分和第二竖直部分，所述胶框上设有贯穿所述水平部分和所述第一竖直部分的第一通孔，所述第二竖直部分末端设有朝内延伸的卡勾部，所述第二竖直部分紧贴所述第一竖直部分，且所述卡勾部卡合于所述第一水平部分。
  2. 根据权利要求1所述的背光模组，其中，所述胶框还包括第一竖直部分上开设的至少一个第二通孔，所述散热板还包括所述第二竖直部分的外壁凸设的凸起部，所述凸起部嵌设于所述第二通孔内。
  3. 根据权利要求1所述的背光模组，其中，所述胶框还包括第一竖直部分上开设的至少一个缺口槽，所述缺口槽在所述第一竖直部分长度方向上与所述第一通孔相邻设置。
  4. 根据权利要求3所述的背光模组，其中，每个所述第一通孔的两侧各设有一个所述缺口槽。
  5. 根据权利要求1所述的背光模组，其中，所述第二水平部分上表面设有导热板。
  6. 根据权利要求1所述的背光模组，其中，所述第一水平部分靠近所述第一通孔的一端为导向斜面。
  7. 根据权利要求6所述的背光模组，其中，所述第一水平部分靠近所述第一通孔的一端设有凸起的筋条，所述卡勾部通过所述导向斜面搭设于所述筋条上表面。
  8. 根据权利要求1所述的背光模组，其中，还包括紧固件，所述紧固件依次穿过所述第一竖直部分和所述第二竖直部分将所述胶框与所述散热板相对固定。
  9. 根据权利要求2所述的背光模组，其中，所述第一水平部分靠近所述第一通孔的一端为导向斜面。
  10. 根据权利要求9所述的背光模组，其中，所述第一水平部分靠近所述第一通孔的一端设有凸起的筋条，所述卡勾部通过所述导向斜面搭设于所述筋条上表面。
  11. 根据权利要求3所述的背光模组，其中，所述第一水平部分靠近所述第一通孔的一端为导向斜面。
  12. 根据权利要求11所述的背光模组，其中，所述第一水平部分靠近所述第一通孔的一端设有凸起的筋条，所述卡勾部通过所述导向斜面搭设于所述筋条上表面。
  13. 根据权利要求4所述的背光模组，其中，所述第一水平部分靠近所述第一通孔的一端为导向斜面。
  14. 根据权利要求13所述的背光模组，其中，所述第一水平部分靠近所述第一通孔的一端设有凸起的筋条，所述卡勾部通过所述导向斜面搭设于所述筋条上表面。
  15. 根据权利要求2所述的背光模组，其中，还包括紧固件，所述紧固件依次穿过所述第一竖直部分和所述第二竖直部分将所述胶框与所述散热板相对固定。
  16. 根据权利要求3所述的背光模组，其中，还包括紧固件，所述紧固件依次穿过所述第一竖直部分和所述第二竖直部分将所述胶框与所述散热板相对固定。
  17. 根据权利要求4所述的背光模组，其中，还包括紧固件，所述紧固件依次穿过所述第一竖直部分和所述第二竖直部分将所述胶框与所述散热板相对固定。
  18. 根据权利要求5所述的背光模组，其中，还包括紧固件，所述紧固件依次穿过所述第一竖直部分和所述第二竖直部分将所述胶框与所述散热板相对固定。
PCT/CN2015/073612 2015-02-10 2015-03-04 一种背光模组 Ceased WO2016127453A1 (zh)

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CN108008575B (zh) * 2018-01-02 2021-04-27 京东方科技集团股份有限公司 一种背光模组及显示器
CN111192521B (zh) * 2020-02-27 2022-01-21 合肥京东方视讯科技有限公司 背光模组和具有其的显示面板

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