WO2013152512A1 - 背光模组及液晶显示装置 - Google Patents

背光模组及液晶显示装置 Download PDF

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Publication number
WO2013152512A1
WO2013152512A1 PCT/CN2012/074075 CN2012074075W WO2013152512A1 WO 2013152512 A1 WO2013152512 A1 WO 2013152512A1 CN 2012074075 W CN2012074075 W CN 2012074075W WO 2013152512 A1 WO2013152512 A1 WO 2013152512A1
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WO
WIPO (PCT)
Prior art keywords
cavity
disposed
backlight module
wall
air
Prior art date
Application number
PCT/CN2012/074075
Other languages
English (en)
French (fr)
Inventor
余亚军
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 US13/509,727 priority Critical patent/US20130271691A1/en
Publication of WO2013152512A1 publication Critical patent/WO2013152512A1/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
    • G02B6/0086—Positioning aspects
    • G02B6/0091—Positioning aspects of the light source relative to the light guide
    • 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
    • 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
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/36—Airflow channels, e.g. constructional arrangements facilitating the flow of air

Definitions

  • the present invention relates to the field of liquid crystal display, and more particularly to a backlight module and a liquid crystal display device.
  • the backlight module is one of the key components of the liquid crystal display device, and is mainly used for providing sufficient light source with uniform brightness and distribution to enable the liquid crystal panel to display images normally.
  • a backlight module of a liquid crystal display device includes: a back plate 100 , an LED light bar 140 fixed on a sidewall of the back plate 100 , and a reflective plate 110 disposed on the back plate 100 .
  • a light guide plate 120 disposed on the reflective plate 110 opposite to the LED light bar 140
  • a plastic frame 150 disposed outside the back plate 100 and pressing the light guide plate 120
  • an outer frame 200 disposed on the light guide plate 120
  • the liquid crystal panel 300 is fixed above the backlight module by components such as the plastic frame 150 and the outer frame 200.
  • the LED light bar 140 of the structure is fixed on the back plate 100.
  • the heat emitted by the LED light bar 140 passes through the side wall of the back plate 100 to the surface of the back plate 100.
  • Conducting and then dissipating heat through air convection, however, the heat conduction path is long, so that heat accumulates in the internal cavity of the backlight module for a long time, causing the temperature of the internal cavity to be at a high value for a long time, in the backlight module
  • the component causes a certain hazard, and the components in the backlight module, such as the reflector 110 and the light guide plate 120, operate in a region where the heat is concentrated for a long period of time, and the display effect of the liquid crystal display device is lowered.
  • FIG. 2 another backlight module is disclosed in US Patent Publication No. 2010/0002418 A1, which includes: a backplane 100, a heat-conducting board 190 closely attached to the backplane 100, and an LED strip attached to the sidewall of the backplane 100.
  • the light guide plate 120 opposite to the LED 142 on the LED light bar 140, the reflective plate 110 disposed under the light guide plate 120, and the outer frame 200 disposed outside the back plate 100.
  • the optical film 130 is disposed on the light guide plate 120.
  • the liquid crystal panel 300 is disposed above the backlight module.
  • the backlight module is further provided with a supporting member 170 for padding the reflective sheet 110 and the light guide plate 120 thereon, and further A gap 180 is formed between the heat conducting plate 190 and the reflection sheet 110 to provide heat insulation.
  • the heat conduction path is still transmitted to the back plate 100 through the heat conduction plate 190, and the heat is dissipated through the back plate 100 in contact with the air, and the heat dissipation is performed.
  • the long path allows the heat to accumulate in the internal cavity of the backlight module for a long time, which causes the temperature inside the backlight module to be at a high value for a long time, thereby affecting the safety of the components inside the backlight module.
  • the technical problem to be solved by the present invention is to provide a backlight module and a liquid crystal display device which are excellent in heat dissipation.
  • a backlight module includes: a back plate, a plastic frame, a light source, and a light guide plate optically coupled with the light source, wherein the back plate, the plastic frame, and the light guide plate are in a backlight mode
  • the inner light entrance side of the group forms an elongated cavity, and the light source is disposed in the cavity;
  • the elongated cavity wall of the cavity defines one or more rows of vent holes, and each row of vent holes is along The extending direction of the cavity is disposed on the cavity wall;
  • the cavity is further provided with a partition for separating the cavity into a heat conduction zone and an illumination zone, and the partition is provided with an opening
  • the light source is an LED light bar, the LED on the LED light bar is disposed in the opening, the PCB board of the LED light bar is located in the heat conduction zone, and the ventilation hole is disposed in the cavity The wall of the heat transfer zone.
  • a backlight module including a back plate, a plastic frame, a light source, and a light guide plate optically coupled with the light source, wherein the back plate, the plastic frame, and the light guide plate are
  • the light-incident side of the backlight module forms an elongated cavity, and the light source is disposed in the cavity; the narrow cavity wall of the cavity is formed with air in the cavity and air outside the cavity. Convection vents.
  • the cavity is further provided with a partition for separating the cavity into a heat conducting area and an illumination area
  • the partition is provided with an opening
  • the light source is an LED light strip
  • the LED light The LED on the strip is disposed in the opening
  • the PCB board of the LED strip is located in the heat conducting area
  • the vent is disposed on the wall of the heat conducting area of the cavity.
  • the partition is a plastic structure. The partition of the plastic structure has better insulation performance.
  • the partition is a metal structure.
  • the partition of the metal structure has better reflective performance.
  • the vent hole comprises one or more rows of vent holes disposed on a cavity wall of the cavity, and each row of vent holes is disposed on the cavity wall along an extending direction of the cavity.
  • the bottom-up air is circulated in the cavity to improve heat dissipation efficiency.
  • the vent hole comprises one or more rows of rear vent holes disposed on the bottom plate of the back plate, and each of the rear vent holes is disposed on the cavity wall along an extending direction of the cavity. Vent holes are provided on the bottom plate of the back plate, and the back panel of the liquid crystal display device is protected by a rear frame to prevent external dust from entering.
  • the backlight module includes an outer frame
  • the vent hole includes one or more rows of side vent holes disposed on the outer frame, and the vent holes of each row along the extending direction of the cavity Provided on the wall of the cavity, the side wall of the plastic frame and the side wall of the back plate corresponding to the side vent hole for corresponding opening or avoidance design, the side vent hole and the empty The cavity is connected.
  • Improve heat dissipation efficiency while avoiding excessive heat transfer to the LCD panel through the frame and frame.
  • the vent hole comprises an air inlet hole disposed at a lower position of the cavity wall and an air outlet hole disposed at a high position of the cavity wall.
  • the air inlet and the air outlet are provided only in the upper part and the lower part of the cavity, thereby reducing the drilling process on the backlight module, and at the same time improving the strength of components such as the back plate and the outer frame.
  • the backlight module includes an outer frame, and a plurality of air outlet holes arranged side by side are disposed at a high position of the cavity, and the air outlet holes are disposed on the outer frame; An air inlet hole is arranged side by side, and the air inlet hole is disposed on a bottom plate of the backboard.
  • the air inlet and outlet are respectively placed on different components to avoid reducing the strength of the assembly.
  • a liquid crystal display device includes the above backlight module.
  • the back plate, the plastic frame and the light guide plate in the backlight module are provided with a vent hole leading to the outside of the backlight module on the cavity wall formed around the light bar, and the vent hole makes the temperature in the cavity higher.
  • the air can convect with the air with lower external temperature, so that the air in the backlight module can bring heat out of the cavity in time, and the air with lower external temperature enters the cavity through the vent hole, on the cavity wall of
  • the heat is exchanged for heat, and then discharged through the vent hole, so that the heat in the cavity of the backlight module is dissipated through the convective air in time, thereby reducing the temperature in the cavity of the backlight module and the wall of the cavity.
  • the cavity wall is an assembly that encloses a cavity, and includes a back plate, a plastic frame, a light guide plate, a PCB board in the cavity, and the like.
  • 1 is a structural tube diagram of a conventional backlight module
  • FIG. 2 is a structural tube diagram of another conventional backlight module.
  • FIG. 3 is a structural view of a liquid crystal display module according to Embodiment 1 of the present invention.
  • FIG. 4 is a structural view of a liquid crystal backlight module according to Embodiment 1 of the present invention.
  • FIG. 5 is a structural view of another form of a liquid crystal backlight module according to Embodiment 1 of the present invention.
  • FIG. 6 is a structural view of a liquid crystal backlight module according to Embodiment 2 of the present invention.
  • Figure 7 is a structural view of a partition member in Embodiment 1 and Embodiment 2 of the present invention.
  • Figure 8 is a first structural view of the plastic frame in the first embodiment of the present invention.
  • Figure 9 is a second structural view of the plastic frame in the first embodiment of the present invention.
  • Figure 10 is a third structural view of the plastic frame in the first embodiment of the present invention.
  • the backlight module of the liquid crystal display device of the present invention includes: a backplane 100, a reflector 110 disposed on the backplane 100, and a sidewall disposed on the sidewall of the backplane 100.
  • the liquid crystal panel 300 is fixed on the backlight module by components such as the plastic frame 150 and the outer frame 200.
  • the LED light bar 140 is formed by the light guide plate 120, the plastic frame 150 and the back plate 100 on the light-inside side of the backlight module.
  • a narrow cavity, and an LED light bar 140 as a light source is disposed in the cavity, and a narrow vent wall of the cavity is provided with a vent hole leading to the outside of the backlight module, and the vent hole is along
  • the extending direction of the cavity is disposed on the cavity wall such that air in the cavity can convect air outside the cavity; the cavity wall is an assembly enclosing a narrow cavity, including a back plate and a glue
  • the backlight module is provided with two rows of channels on the cavity wall of the backlight module, which is formed by the light guide plate 120, the plastic frame 150 and the back plate 100 in the backlight module.
  • the vent can also be one or more rows of vents.
  • the vent holes are two rows of vent holes from the bottom to the top of the back plate 100 and the outer frame 200 : a side vent 810 and a rear vent 820 .
  • the rear vent 820 disposed on the bottom plate on the back plate 100 directly leads into the cavity, and the side vent 810 disposed on the outer frame 200 needs to be opened on the side wall of the plastic frame 150 and on the back.
  • the side walls of the panel 100 are apertured or evasive to allow the side vents 810 to communicate with the interior of the cavity.
  • the side vent 810 and the rear vent 820 are arranged on the liquid crystal display device from bottom to top, that is, along the lower end of the cavity.
  • the LED 141 on the LED light bar 140 is heated to increase the temperature of the air in the cavity and the cavity wall of the cavity (including the back plate, the PCB board, the plastic frame, the light guide plate, etc.), and the air is thermally expanded.
  • the air in the lower portion of the cavity is heated and is discharged by the upper side vent 810 or the rear vent 820, and the cavity
  • the lower portion needs to replenish air from the lower side vent 810 or the rear vent 820 due to the pressure difference, thus forming air circulation in the cavity; thereby reducing the temperature of the air in the cavity while circulating the air against the air Components such as the board 100, the PCB board 142, and the bezel 150 are heat exchanged to reduce the temperature of these components.
  • the side vent 810 and the rear vent 820 form a heat insulating tape on the plastic frame 150 and the outer frame 200, the heat on the back plate 100 is transmitted to the liquid crystal panel 300 through the plastic frame and the outer frame as little as possible. ,and then Avoid temperature rise affecting the LCD panel.
  • the 8-10 shows the outer frame 200 and the side vents 810 disposed thereon.
  • the side vents 810 may be arranged in one row or two rows or three rows or more. Or cross-arranged, the shape can be any other shape such as direction, circle or polygon.
  • the rear vent 820 can also be constructed similarly.
  • the side vent 810 and the rear vent 820 can also directly be two elongated slots provided on the outer frame and the back plate, and each slot is equivalent. A row of side vents or a row of rear vents for easy processing.
  • a plurality of vent holes are disposed in a cavity wall of the cavity formed by the light guide plate, the plastic frame, and the back plate 100 in the backlight module of the backlight module, and the vent holes are respectively located at
  • the air inlet 840 at the lower portion of the cavity wall and the air outlet 830 at the upper portion of the cavity wall are disposed on the side wall of the back plate 100 in the cavity.
  • the LED 141 on the LED strip 140 is heated to cause the temperature of the air in the cavity and the cavity wall of the cavity (including the back plate, the PCB board, the plastic frame, the light guide plate, etc.) to rise, and the air is thermally expanded.
  • the air outlet 830 is discharged.
  • the lower air enters the cavity from the air inlet hole to form a circulation, thereby forming a flowing air in the cavity, thereby reducing the temperature of the air in the cavity, and simultaneously utilizing
  • the air circulation flows heat exchange of components such as the back plate 100, the PCB board 142, and the bezel 150 to lower the temperature of these components.
  • the air intake hole 840 at the lower position is disposed on the bottom plate of the back plate 100, and the air outlet hole 830 at the upper position is disposed on the side wall of the outer frame 150, and the air outlet hole 810 passes through the back plate 100.
  • the plastic frame 150 and the outer frame 200 are formed with openings at corresponding positions.
  • the air inlet hole 840 and the air outlet hole 830 may be a plurality of smaller vent holes arranged to prevent dust from entering the cavity; or a larger vent hole, and the vent hole is disposed on the larger vent hole A layer of air filter to prevent dust from entering the cavity.
  • a light guide plate 120, a plastic frame 150, and a back plate 100 are further disposed in a cavity formed in the backlight module. Will be empty
  • the partition 270 is divided into a heat conducting area and an illumination area. As shown in FIG. 7, the partition 270 is provided with an opening 271, and an LED on the LED strip is disposed in the opening 271, and the PCB of the LED strip 140 A plate 142 is located in the thermally conductive region and a vent is disposed in the wall of the thermally conductive region of the cavity.
  • the partition member 270 may be a plastic material with good heat insulation properties or a metal material with good reflective property, or a composite material, and may not leak light.
  • the side of the spacer 270 is fixedly contacted with the plastic frame 150, and the other side is fixedly contacted with the bottom surface of the back plate 100.
  • the fixing method can adopt the common method such as gluing, which can prevent the dust from entering the illumination area and contaminating the light guide plate and the LED, affecting the display quality, and avoiding the problem of light leakage.
  • the light source used in the backlight module is an LED light bar.
  • the technical solution of the present invention is also applicable to other heat generating sources such as a cold cathode tube.
  • vent hole can be disposed on the cavity wall or the cavity bottom of the cavity, but it can be arranged on the cavity top to facilitate the dust to enter the cavity through the vent hole.
  • the cavity itself is not large, and the number of vent holes can be set at the top of the cavity or at the bottom of the cavity, so that the speed of air circulation is not high and the volume of air flowing is small, so the heat dissipation effect is not good.

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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)
  • Planar Illumination Modules (AREA)

Abstract

一种背光模组及液晶显示装置，包括背板（100）、胶框（150）、光源（140）以及与光源光耦合的导光板（120）。背板（100）、胶框（150）以及导光板（120）在背光模组内部入光侧形成一个狭长的空腔，光源（140）设置在空腔内；空腔的狭长的腔壁上开设有使空腔内的空气与空腔外的空气形成对流的通气孔（810、820）。由于在背光模组内的背板、胶框以及导光板在灯条周围形成的空腔腔壁上设置了通向背光模组外部的通气孔，通气孔使得空腔内的温度较高的空气能够与外部温度较低的空气形成对流，使得背光模组空腔内的热量及时与外部空气进行热交换，降低背光模组空腔内以及腔壁的温度。

Description

背光模组及液晶显示装置
【技术领域】
本发明涉及液晶显示领域， 更具体的说， 涉及一种背光模组及液晶显示装 置。
【背景技术】
背光模组为液晶显示装置的关键组件之一， 其主要用于提供足够的亮度与 分布均匀的光源， 使液晶面板能正常显示影像。
如图 1所示为一种液晶显示装置的背光模组， 包括： 背板 100、 固定于背 板 100侧壁上的 LED灯条 140、 置于背板 100之上的反射板 110、 置于反射板 110之上并与 LED灯条 140对置的导光板 120、设置在背板 100之外并压合导光 板 120的胶框 150以及外框 200, 光学膜片 130设置在导光板 120的出光面上， 液晶面板 300由胶框 150、 外框 200等组件固定在背光模组的上方。 该种结构的 LED灯条 140是固定在背板 100上的，在背光模组的内部空腔中， LED灯条 140 所发出的热通过背板 100的侧壁往背板 100的板面上导去， 然后通过空气对流 进行散热， 然而其热传导路径较长， 使得热量长时间积累在背光模组的内部空 腔中， 造成内部空腔的温度长时间处于高值， 对背光模组内的组件造成一定的 危害， 使背光模组内的组件如反射板 110 以及导光板 120等在长期热量集中的 区域内工作而发生变化造成液晶显示装置的显示效果的降低。
如图 2所示， 美国专利文件 US2010/0002418A1公开了另一种背光模组， 包括： 背板 100、 与背板 100紧密贴合的导热板 190固定于背板 100侧壁上的 LED灯条 140、 与 LED灯条 140上的 LED142对置的导光板 120、 置于导光板 120之下的反射板 110、 设置在背板 100之外的外框 200, 光学膜片 130设置在 导光板 120的出光面上， 液晶面板 300设置在背光模组的上方， 此外， 该种背 光模组还设置有支持件 170,用于将反射片 110及其上的导光板 120等组件垫起， 进而在导热板 190及反射片 110之间形成间隙 180, 起到隔热作用。 然而该种设 置下虽然在热量传递中尽量避免热量对反射片 110等组件的影响， 但是其热传 导路径依然是通过导热板 190将热量传至背板 100,并通过背板 100与空气接触 实现散热， 其散热路径较长， 使得热量依然长时间积聚在背光模组内部空腔中， 进而造成背光模组内部的温度长时间处于高值， 从而影响到背光模组内部的组 件的安全性。
【发明内容】
本发明所要解决的技术问题是提供一种散热性良好的背光模组及液晶显示 装置。
本发明的目的是通过以下技术方案来实现的： 一种背光模组， 包括： 背板、 胶框、 光源以及与光源光耦合的导光板， 所述背板、 胶框以及导光板在背光模 组内部入光侧形成一个狭长的空腔， 所述光源设置在所述空腔内； 所述空腔的 狭长的腔壁上开设有一排或多排通气孔， 所述每排通气孔沿着所述空腔的延伸 方向设置在所述腔壁上； 所述空腔内还设置有一个用于将空腔分隔成导热区及 照明区的分隔件， 所述分隔件上设置有开孔， 所述光源为 LED灯条， 所述 LED 灯条上的 LED设置在所述开孔内，所述 LED灯条的 PCB板位于所述导热区内 , 所述通气孔设置在所述空腔的导热区腔壁上。
本发明的目的还可以通过另一技术方案来实现： 一种背光模组， 包括背板、 胶框、 光源以及与光源光耦合的导光板， 其中， 所述背板、 胶框以及导光板在 背光模组内部入光侧形成一个狭长的空腔， 所述光源设置在所述空腔内； 所述 空腔的狭长的腔壁上开设有使空腔内的空气与空腔外的空气形成对流的通气 孔。
优选的， 所述空腔内还设置有一个用于将空腔分隔成导热区及照明区的分 隔件， 所述分隔件上设置有开孔， 所述光源为 LED灯条， 所述 LED灯条上的 LED设置在所述开孔内， 所述 LED灯条的 PCB板位于所述导热区内， 所述通 气孔设置在所述空腔的导热区腔壁上。 优选的， 所述分隔件为塑胶结构。 塑胶结构的分隔件隔热性能较好。
优选的， 所述分隔件为金属结构。 金属结构的分隔件反光性能较好。
优选的， 所述通气孔包括设置在空腔的腔壁上的一排或多排通气孔， 所述 每排通气孔沿着所述空腔的延伸方向设置在所述腔壁上。 使空腔内产生自下而 上的空气循环流动， 提高散热效率。
优选的， 所述通气孔包括设置在背板的底板上的一排或多排后边通气孔， 所述每排后边通气孔沿着所述空腔的延伸方向设置在所述腔壁上。 在背板的底 板上设置通气孔， 液晶显示装置的背板后还有后框的保护， 可尽量避免外部粉 尘进入。
优选的， 所述背光模组包括有外框， 所述通气孔包括设置在外框上的一排 或多排侧边通气孔， 所述每排侧边通气孔沿着所述空腔的延伸方向设置在所述 腔壁上， 所述胶框的侧壁以及所述背板的侧壁对应于所述侧边通气孔作相应的 开孔或避让设计使所述侧边通气孔与所述空腔连通。 提高散热效率的同时能够 避免过多的热量通过胶框以及外框传导至液晶面板上。
优选的， 所述通气孔包括设置在空腔腔壁低位处的进气孔以及设置在空腔 腔壁高位处的出气孔。 仅在空腔上部以及下部设置进气孔以及出气孔， 减少在 背光模组上的开孔加工， 同时可以提高背板以及外框等组件的强度。
优选的， 所述背光模组包括有外框， 所述空腔高位处设置有多个并排设置 的出气孔， 所述出气孔设置在所述外框上； 所述空腔低位处设置有多个并排设 置的进气孔， 所述进气孔设置在所述背板的底板上。 进气孔和出气孔分别设置 在不同的组件上， 可避免降低组件的强度。
一种液晶显示装置， 包括上述的背光模组。
本发明由于在背光模组内的背板、 胶框以及导光板在灯条周围形成的空腔 腔壁上设置了通向背光模组外部的通气孔， 通气孔使得空腔内的温度较高的空 气能够与外部温度较低的空气形成对流， 使得背光模组内的空气及时将热量带 出空腔外， 同时外部温度较低的空气通过通气孔进入空腔内， 对空腔腔壁上的 热量进行热交换， 之后再通过通气孔排出， 使得背光模组的空腔内的热量及时 通过对流的空气散发出去， 降低背光模组空腔内以及腔壁的的温度。 所述腔壁 即为围成空腔的组件， 其包括背板、胶框、导光板以及处于空腔内的 PCB板等。
【附图说明】
图 1是现有一种背光模组的结构筒图，
图 2是现有另一种背光模组的结构筒图，
图 3是本发明实施例 1的液晶显示模组的结构筒图，
图 4是本发明实施例 1的液晶背光模组的结构筒图，
图 5是本发明实施例 1的液晶背光模组的另一形式的结构筒图，
图 6是本发明实施例 2的液晶背光模组的结构筒图，
图 7是本发明实施例 1及实施例 2中的分隔件的结构筒图，
图 8是本发明实施例 1中胶框的第一种结构筒图，
图 9是本发明实施例 1中胶框的第二种结构筒图，
图 10是本发明实施例 1中胶框的第三种结构筒图。
其中： 100、 背板， 110、 反射板， 120、 导光板， 130、 光学膜片， 140、 LED 灯条， 150、 胶框， 170、 支持件， 180、 间隔， 190、 导热板， 141、 LED, 142、 PCB, 270、 分隔件， 810、 侧边通气孔， 820、 后边通气孔， 830、 出气孔， 840、 进气孔。
【具体实施方式】
下面结合附图和较佳的实施例对本发明作进一步说明。
如图 3-6所示为本发明所述的液晶显示装置的背光模组，其包括：背板 100、 置于背板 100之上的反射板 110、设置在背板 100的侧壁上的 LED灯条 140、置 于反射板 110之上并与 LED灯条 140对置的导光板 120、 设置在背板 100之外 并压合导光板 120的胶框 150以及外框 200,光学膜片 130设置在导光板 120的 出光面上， 液晶面板 300由胶框 150、 外框 200等组件固定在背光模组的上方； LED灯条 140由导光板 120、 胶框 150以及背板 100在背光模组内部入光侧形 成了一个狭长空腔， 而作为光源的 LED灯条 140则设置在所述空腔内， 所述空 腔的狭长腔壁上开设有通向背光模组外的通气孔， 所述通气孔沿着所述空腔的 延伸方向设置在所述腔壁上使得空腔内的空气能与空腔外的空气形成对流； 所 述腔壁即为围成狭长空腔的组件， 其包括背板、 胶框、 导光板、 处于空腔内的 PCB板以及外框等。
实施例一
如图 3及 4所示， 在背光模组在背光模组的由导光板 120、胶框 150以及背 板 100在背光模组内部所形成的狭长空腔的腔壁上， 设置有两排通气孔， 当然， 也可以为一排或多排通气孔。 如图 4所示， 所述通气孔分别为设置在背板 100 以及外框 200上的由下而上的两排通气孔：侧边通气孔 810以及后边通气孔 820。 设置在背板 100上的底板上的后边通气孔 820直接通向所述空腔内， 而设置在 外框 200上的侧边通气孔 810则需要在胶框 150的侧壁上开孔以及在背板 100 的侧壁上开孔或作避让设计以使侧边通气孔 810与所述空腔内连通。 由图 4可 知， 侧边通气孔 810以及后边通气孔 820在液晶显示装置上沿着自下而上排列， 也就是沿着空腔的下端向上端排列。 这样， 当液晶显示装置工作时， LED灯条 140上的 LED141发热使得空腔内的空气与空腔的腔壁（包括背板、 PCB板、 胶 框以及导光板等）温度上升， 空气受热膨胀因而从侧边通气孔 810或后边通气 孔 820, 此时由于空腔内压力降^ 空腔下部的空气受热而上升并由处于上方的 侧边通气孔 810或后边通气孔 820排出， 而空腔下部由于压差需要从处于下方 的侧边通气孔 810或后边通气孔 820补充空气， 这样就形成了空气在空腔内循 环对流； 进而降低空腔内的空气温度， 同时利用空气循环流动对背板 100、 PCB 板 142以及胶框 150等组件进行换热， 降低这些组件的温度。 另外， 由于侧边 通气孔 810以及后边通气孔 820在胶框 150以及外框 200上形成一条隔热带， 使得背板 100上的热量尽可能少的通过胶框以及外框传导至液晶面板 300,进而 避免温度升高影响到液晶面板。
如图 8-10所示为本实施例所述外框 200及设置在其上的侧边通气孔 810, 侧边通气孔 810可以是是一排或者二排或者三排甚至更多的孔排列或交叉排列 而成， 其形状可以是方向、 圓形或是多边形等其他任意形状。 当然， 后边通气 孔 820也可以作类似的结构。
另外， 如图 5所示， 在本实施例一中， 侧边通气孔 810以及后边通气孔 820 还可以直接是两条细长的设置在外框以及背板上的开槽， 每个开槽相当于一排 侧边通气孔或一排后边通气孔， 这样便于加工。
实施例二
如图 6所示， 在背光模组的由导光板、 胶框以及背板 100在背光模组内部 所形成的空腔的腔壁上， 设置有多个通气孔， 所述通气孔分别为处于空腔腔壁 低位处的进气孔 840以及处于空腔腔壁高位处的出气孔 830, LED灯条 140的 PCB板 142设置在空腔内的背板 100的侧壁上。 当液晶显示装置工作时， LED 灯条 140上的 LED141发热使得空腔内的空气与空腔的腔壁 （包括背板、 PCB 板、 胶框以及导光板等）温度上升， 空气受热膨胀因而从出气孔 830排出， 此 时由于空腔内压力降低， 下部的空气从进气孔进入空腔内， 形成循环， 这样在 空腔内形成流动的空气， 进而降低空腔内的空气温度， 同时利用空气循环流动 对背板 100、 PCB板 142以及胶框 150等组件进行换热， 降低这些组件的温度。
在本发明实施例二中， 处于低位的进气孔 840设置在背板 100的底板上， 而处于高位的出气孔 830则设置在外框 150的侧壁上， 出气孔 810通过在背板 100、 胶框 150以及外框 200对应位置上开孔形成。 进气孔 840以及出气孔 830 可以是多个排列的较小的通气孔， 这样可以避免沙尘进入空腔内； 也可以是一 个较大的通气孔， 并在该较大的通气孔上设置一层防尘网， 以避免沙尘进入空 腔内。
进一步的， 如图 3所示， 在本发明实施例一及实施例二中， 由导光板 120、 胶框 150以及背板 100在背光模组内部所形成的空腔内还设置有一个用于将空 腔分隔成导热区及照明区的分隔件 270, 如图 7所示分隔件 270上设置有开孔 271 , LED灯条上的 LED设置在所述开孔 271内， 而 LED灯条 140的 PCB板 142位于所述导热区内， 而通气孔设置在所述空腔的导热区腔壁上。 分隔件 270 可以为隔热性能好的塑料材质或反光能力好金属材质， 也可以是复合材料， 不 漏光即可。 该分隔件 270的侧边和胶框 150接触固定， 另一侧边和背板 100底 面接触固定。 固定方式可以采用胶粘等常见的方式， 这样可以避免粉尘进入照 明区污染导光板以及 LED, 影响显示质量， 同时也避免出现漏光的问题。
对于本发明两个实施例来说， 背光模组所用的光源为 LED灯条， 当然， 本 发明的技术方案同样适用于其它发热的光源， 如冷阴极管等。
最后， 值得一提的是， 通气孔除了可以设置在空腔的狭长腔壁上外， 也可 以设置在空腔的腔顶或腔底， 但是设置在腔顶容易使落尘通过通气孔进入空腔 内； 另外空腔本身体积不大， 在腔顶或腔底能够设置通气孔的数量不多， 进而 使得空气循环流动的速度不高及流动的空气体积较少， 这样散热效果也不好。
以上内容是结合具体的优选实施方式对本发明所作的进一步详细说明， 不 能认定本发明的具体实施只局限于这些说明。 对于本发明所属技术领域的普通 技术人员来说， 在不脱离本发明构思的前提下， 还可以做出若干筒单推演或替 换， 都应当视为属于本发明的保护范围。

Claims

权利要求
1、 一种背光模组， 包括： 背板、 胶框、 光源以及与光源光耦合的导光板， 所述背板、 胶框以及导光板在背光模组内部入光侧形成一个狭长的空腔， 所述 光源设置在所述空腔内； 所述空腔的狭长的腔壁上开设有一排或多排通气孔， 所述每排通气孔沿着所述空腔的延伸方向设置在所述腔壁上； 所述空腔内还设 置有一个用于将空腔分隔成导热区及照明区的分隔件， 所述分隔件上设置有开 孔， 所述光源为 LED灯条， 所述 LED灯条上的 LED设置在所述开孔内， 所述 LED灯条的 PCB板位于所述导热区内， 所述通气孔设置在所述空腔的导热区腔 壁上。
2、 一种背光模组， 包括背板、 胶框、 光源以及与光源光耦合的导光板， 所 述背板、 胶框以及导光板在背光模组内部入光侧形成一个狭长的空腔， 所述光 源设置在所述空腔内； 所述空腔的狭长的腔壁上开设有使空腔内的空气与空腔 外的空气形成对流的通气孔。
3、 如权利要求 2所述的一种背光模组， 其中， 所述空腔内还设置有一个用 于将空腔分隔成导热区及照明区的分隔件， 所述分隔件上设置有开孔， 所述光 源为 LED灯条， 所述 LED灯条上的 LED设置在所述开孔内， 所述 LED灯条的 PCB板位于所述导热区内， 所述通气孔设置在所述空腔的导热区腔壁上。
4、 如权利要求 3所述的一种背光模组， 其中， 所述分隔件为塑胶结构。
5、 如权利要求 3所述的一种背光模组， 其中， 所述分隔件为金属结构。
6、 如权利要求 2所述的一种背光模组， 其中， 所述通气孔包括设置在空腔 的腔壁上的一排或多排通气孔， 所述每排通气孔沿着所述空腔的延伸方向设置 在所述腔壁上。
7、 如权利要求 6所述的一种背光模组， 其中， 所述通气孔包括设置在背板 的底板上的一排或多排后边通气孔， 所述每排后边通气孔沿着所述空腔的延伸 方向设置在所述腔壁上。
8、 如权利要求 6所述的一种背光模组， 其中， 所述背光模组包括有外框， 所述通气孔包括设置在外框上的一排或多排侧边通气孔， 所述每排侧边通气孔 沿着所述空腔的延伸方向设置在所述腔壁上， 所述胶框的侧壁以及所述背板的 侧壁对应于所述侧边通气孔作相应的开孔或避让设计使所述侧边通气孔与所述 空腔连通。
9、 如权利要求 2所述的一种背光模组， 其中， 所述通气孔包括设置在空腔 腔壁低位处的进气孔以及设置在空腔腔壁高位处的出气孔。
10、 如权利要求 9所述的一种背光模组， 其中， 所述背光模组包括有外框， 所述空腔高位处设置有多个出气孔， 所述出气孔设置在所述外框上； 所述空腔 低位处设置有多个进气孔， 所述进气孔设置在所述背板的底板上。
11、 一种液晶显示装置， 包括： 背板、 胶框、 光源以及与光源光耦合的导 光板， 所述背板、 胶框以及导光板在背光模组内部入光侧形成一个狭长的空腔， 所述光源设置在所述空腔内； 所述空腔的狭长的腔壁上开设有使空腔内的空气 与空腔外的空气形成对流的通气孔。
12、 如权利要求 11所述的一种液晶显示装置， 其中， 所述空腔内还设置有 一个用于将空腔分隔成导热区及照明区的分隔件， 所述分隔件上设置有开孔， 所述光源为 LED灯条， 所述 LED灯条上的 LED设置在所述开孔内， 所述 LED 灯条的 PCB板位于所述导热区内 ,所述通气孔设置在所述空腔的导热区腔壁上。
13、 如权利要求 12所述的一种液晶显示装置， 其中， 所述分隔件为塑胶结 构。
14、 如权利要求 12所述的一种液晶显示装置， 其中， 所述分隔件为金属结 构。
15、 如权利要求 11所述的一种液晶显示装置， 其中， 所述通气孔包括设置 在空腔的腔壁上的一排或多排通气孔， 所述每排通气孔沿着所述空腔的延伸方 向设置在所述腔壁上。
16、 如权利要求 15所述的一种液晶显示装置， 其中， 所述通气孔包括设置 在背板的底板上的一排或多排后边通气孔， 所述每排后边通气孔沿着所述空腔 的延伸方向设置在所述腔壁上。
17、 如权利要求 15所述的一种液晶显示装置， 其中， 所述背光模组包括有 外框， 所述通气孔包括设置在外框上的一排或多排侧边通气孔， 所述每排侧边 通气孔沿着所述空腔的延伸方向设置在所述腔壁上， 所述胶框的侧壁以及所述 背板的侧壁对应于所述侧边通气孔作相应的开孔或避让设计使所述侧边通气孔 与所述空腔连通。
18、 如权利要求 11所述的一种液晶显示装置， 其中， 所述通气孔包括设置 在空腔腔壁低位处的进气孔以及设置在空腔腔壁高位处的出气孔。
19、 如权利要求 18所述的一种液晶显示装置， 其中， 所述背光模组包括有 外框， 所述空腔高位处设置有多个出气孔， 所述出气孔设置在所述外框上； 所 述空腔低位处设置有多个进气孔， 所述进气孔设置在所述背板的底板上。
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3614200A1 (en) * 2018-08-23 2020-02-26 Funai Electric Co., Ltd. Display device

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102943981B (zh) * 2012-11-22 2015-11-25 深圳市华星光电技术有限公司 一种背光模组及液晶显示装置
CN105700238B (zh) * 2013-08-05 2019-03-15 青岛海信电器股份有限公司 侧光式液晶模组、直下式液晶模组及电视机
CN105485579A (zh) * 2016-01-12 2016-04-13 京东方科技集团股份有限公司 背光模组和显示装置
CN107436508A (zh) * 2016-05-25 2017-12-05 鸿富锦精密工业（深圳）有限公司 背光模组及液晶显示装置
CN106168723A (zh) * 2016-07-18 2016-11-30 武汉华星光电技术有限公司 背光模组及液晶显示器
CN108287432A (zh) * 2017-12-28 2018-07-17 重庆市中光电显示技术有限公司 侧光式背光模组
CN110187541B (zh) * 2019-06-14 2024-03-22 上海启钧电子有限公司 显示设备
CN110568667B (zh) * 2019-09-17 2022-06-07 高创(苏州)电子有限公司 背光模组及显示装置
CN113219719B (zh) * 2021-04-23 2023-06-30 成都京东方显示科技有限公司 背光模组、液晶模组及显示装置
CN115113439B (zh) * 2022-08-23 2022-12-23 惠科股份有限公司 背光模组和显示装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008041638A (ja) * 2006-08-07 2008-02-21 Sunonwealth Electric Machine Industry Co Ltd 平面ディスプレイのためのバックライト光源用熱放散デバイス
CN101307894A (zh) * 2008-05-29 2008-11-19 京东方科技集团股份有限公司 侧光式发光二极管背光源
CN101556024A (zh) * 2008-04-09 2009-10-14 荣晋精密科技股份有限公司 侧光式背光模组的灯反射器
KR20110101619A (ko) * 2010-03-09 2011-09-16 엘지이노텍 주식회사 백라이트 유닛 및 이를 이용한 디스플레이 장치
KR101118917B1 (ko) * 2011-11-17 2012-02-27 정기석 엘이디 조명 및 백라이트 유닛용 광원장치

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008020557A (ja) * 2006-07-11 2008-01-31 Epson Imaging Devices Corp 液晶表示モジュール
JP5026798B2 (ja) * 2007-01-04 2012-09-19 株式会社ジャパンディスプレイイースト Ｌｅｄ照明装置及びこれを用いた液晶表示装置
CN201322255Y (zh) * 2008-11-14 2009-10-07 中华映管股份有限公司 液晶显示器装置及背光模块
CN101694552B (zh) * 2009-10-21 2011-04-13 友达光电股份有限公司 液晶显示装置
CN201696950U (zh) * 2010-06-22 2011-01-05 京东方科技集团股份有限公司 背光模组
CN102374449A (zh) * 2010-08-09 2012-03-14 荣晋精密科技股份有限公司 发光单元及具有该发光单元的背光模块

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008041638A (ja) * 2006-08-07 2008-02-21 Sunonwealth Electric Machine Industry Co Ltd 平面ディスプレイのためのバックライト光源用熱放散デバイス
CN101556024A (zh) * 2008-04-09 2009-10-14 荣晋精密科技股份有限公司 侧光式背光模组的灯反射器
CN101307894A (zh) * 2008-05-29 2008-11-19 京东方科技集团股份有限公司 侧光式发光二极管背光源
KR20110101619A (ko) * 2010-03-09 2011-09-16 엘지이노텍 주식회사 백라이트 유닛 및 이를 이용한 디스플레이 장치
KR101118917B1 (ko) * 2011-11-17 2012-02-27 정기석 엘이디 조명 및 백라이트 유닛용 광원장치

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3614200A1 (en) * 2018-08-23 2020-02-26 Funai Electric Co., Ltd. Display device
US20200064543A1 (en) * 2018-08-23 2020-02-27 Funai Electric Co., Ltd. Display device
US10928582B2 (en) 2018-08-23 2021-02-23 Funai Electric Co., Ltd. Display device
EP3865935A1 (en) 2018-08-23 2021-08-18 Funai Electric Co., Ltd. Display device
EP3865934A1 (en) 2018-08-23 2021-08-18 Funai Electric Co., Ltd. Display device

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