WO2013143123A1 - 一种背光模组及液晶显示装置 - Google Patents

一种背光模组及液晶显示装置 Download PDF

Info

Publication number
WO2013143123A1
WO2013143123A1 PCT/CN2012/073323 CN2012073323W WO2013143123A1 WO 2013143123 A1 WO2013143123 A1 WO 2013143123A1 CN 2012073323 W CN2012073323 W CN 2012073323W WO 2013143123 A1 WO2013143123 A1 WO 2013143123A1
Authority
WO
WIPO (PCT)
Prior art keywords
backlight module
plastic frame
disposed
side wall
liquid crystal
Prior art date
Application number
PCT/CN2012/073323
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 US13/503,096 priority Critical patent/US20130257705A1/en
Priority to DE112012005830.5T priority patent/DE112012005830T5/de
Publication of WO2013143123A1 publication Critical patent/WO2013143123A1/zh

Links

Classifications

    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336Illuminating devices
    • G02F1/133602Direct backlight
    • G02F1/133608Direct backlight including particular frames or supporting means
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/133308Support structures for LCD panels, e.g. frames or bezels
    • G02F1/133314Back frames
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/133308Support structures for LCD panels, e.g. frames or bezels
    • G02F1/133317Intermediate frames, e.g. between backlight housing and front frame
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336Illuminating devices
    • G02F1/133615Edge-illuminating devices, i.e. illuminating from the side

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 , a light bar 140 fixed on a sidewall of the back plate 100 , a reflective plate 110 disposed on the back plate 100 , and a reflection plate a light guide plate 120 disposed on the board 110 opposite to the light strip 140, a plastic frame 150 disposed outside the back plate 100 and pressing the light guide plate 120, and an outer frame 200 disposed on the light emitting surface of 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 A value of the backlight module is getting smaller and smaller, and the liquid crystal display device generally uses a point light source such as an LED to provide sufficient brightness, thereby causing other problems such as firefly phenomenon.
  • the value of A is the length of the LED 141 to the display area of the liquid crystal display device (ie, the AA area), that is, the distance from the LED 141 to the end position of the inner edge of the plastic frame 150 as shown in FIG. 1;
  • the problem caused by the reduction is the generation of a hotspot, that is, as shown in FIG.
  • the LED 141 is emitted in the display area of the liquid crystal display device (ie, the AA area) near the edge of the light bar 140.
  • the LED 141 is emitted in the display area of the liquid crystal display device (ie, the AA area) near the edge of the light bar 140.
  • the light is emitted at a certain angle, and a dark band is formed between the plurality of LEDs 141.
  • the phenomenon that the light is alternately arranged from top to bottom is a firefly phenomenon, which seriously affects the backlight module.
  • the US Patent Publication No. 2010/0002418 A1 discloses another backlight module, which includes: a backplane 100, a heat strip 190 closely attached to the backplane 100, and a light bar 140 fixed on the sidewall of the backplane 100. a light guide plate 120 opposite to the LED 142 on the light bar 140, a reflector 110 disposed under the light guide plate 120, and an 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, thereby conducting heat conduction.
  • An air cavity 180 is formed between the plate 190 and the reflection sheet 110 to provide heat insulation.
  • the backlight module of the structure also faces the problem of reducing the A value caused by the narrow frame. If the narrow frame design exceeds the allowable range of the A value, that is, the position of the light guide plate 120 is fixed due to the fixed position of the LED 141. The distance from the LED 141 is reduced, resulting in a decrease in the A value, and a firefly phenomenon is formed in the display region of the liquid crystal display device to affect the optical taste of the backlight module and the display effect of the liquid crystal display device.
  • the technical problem to be solved by the present invention is to provide a backlight module and a liquid crystal display device which have a narrow frame and a good display effect.
  • a backlight module includes a light guide plate, a row of point light sources, and a back plate, and a sidewall of the back plate is disposed with respect to the light guide plate of the light guide plate. a recess extending outside the backlight module, the light source being disposed at the recess.
  • the recess on the sidewall of the backboard is a through hole disposed on the sidewall of the backboard.
  • the through hole is easy to process, and the light source is conveniently positioned.
  • the through hole is used to form a recess on the sidewall of the back plate, so that the light source can be installed in the through hole to increase the A value of the backlight module.
  • the backlight module includes a plastic frame, and a sidewall of the plastic frame corresponding to the through hole is also provided with a recess. A recess is also provided on the plastic frame to further increase the A value of the backlight module.
  • the backlight module includes an outer frame, and the recess on the plastic frame is a through hole disposed on a side wall of the plastic frame, and the light source is disposed on the flat sidewall of the outer frame.
  • the through hole is easy to machine and it is convenient to position the light source.
  • the backlight module includes an outer frame, and the recess on the plastic frame is a through hole disposed on a sidewall of the plastic frame, and a sidewall of the outer frame corresponds to a sidewall of the plastic frame
  • the position of the through hole is provided with a boss extending toward the inside of the backlight module, the depth of the boss is smaller than the sum of the thickness of the side wall of the back plate and the thickness of the side wall of the plastic frame, and the light source is disposed at the Said on the boss.
  • the purpose of setting the boss is to The optical module is easy to position when assembled, improving assembly accuracy and assembly efficiency.
  • the side wall of the backboard is bent on a side wall of the backboard, and the light source is disposed on the bend.
  • the back plate is provided with a bend to form a recess, and the strength of the back plate can be prevented from being lowered relative to the through hole.
  • the backlight module includes a plastic frame, and a sidewall of the plastic frame corresponding to the through hole is also provided with a recess.
  • the A value of the backlight module can be increased.
  • the recess on the side wall of the plastic frame is a through hole disposed on the sidewall of the plastic frame, and the bending on the sidewall of the back plate is not inserted into the through hole on the sidewall of the plastic frame.
  • the light source is disposed on the bend. The bending of the back plate cooperates with the through holes on the plastic frame to form a recess extending toward the outside of the backlight module, thereby increasing the A value of the backlight module.
  • the point light source is an LED light bar.
  • the LED has high brightness and low energy consumption.
  • the backing plate material is a material with good heat dissipation. Since the light source is fixed on the back plate, heat can be dissipated through the back plate, so that the heat dissipation material of the back plate can improve the heat dissipation efficiency of the backlight module.
  • a liquid crystal display device includes the above backlight module.
  • the present invention is provided with a recess extending toward the outside of the backlight module with respect to the light entrance of the light guide plate on the side wall of the backlight of the backlight module, and the light source is disposed in the recess, and the light source is opposite to the plastic frame by the recess
  • the distance of the inner edge is increased, that is, the value of A is increased, thereby effectively eliminating the dark band area between the light sources between the light sources on the point source, and avoiding the occurrence of fireflies in the display area of the liquid crystal display device. (hotspot) phenomenon.
  • the corresponding A value can be selected, that is, the critical value of the firefly phenomenon does not occur between the maximum A value obtained by the recess, thereby making the border of the liquid crystal display device It is narrower, and the display area of the liquid crystal display device is enlarged.
  • 1 is a structural tube diagram of a conventional backlight module.
  • 2 is a structural tube diagram of another conventional backlight module.
  • FIG. 3 is a schematic diagram of the A value of the existing backlight module and the firefly occurrence area
  • FIG. 4 is a structural view of a backlight module according to an embodiment of the present invention.
  • FIG. 5 is a structural diagram of a backlight module according to Embodiment 2 of the present invention.
  • FIG. 6 is a structural diagram of a backlight module of a third embodiment of the present invention.
  • FIG. 7 is a schematic diagram showing the A value of the backlight module and the firefly occurrence area according to the first embodiment, the second embodiment and the third embodiment of the present invention.
  • the backlight module of the liquid crystal display device of the present invention includes: a back plate 100, a reflective plate 110 disposed on the back plate 100, and a reflector plate 110 disposed above the lamp
  • the light guide plate 120 opposite to the strip 140 is disposed outside the back plate 100 and presses the plastic frame 150 of the light guide plate 120 and the outer frame 200.
  • the optical film 130 is disposed on the light emitting surface of the light guide plate 120, and the liquid crystal panel 300 is made of glue.
  • the frame 150, the outer frame 200 and the like are fixed on the backlight module.
  • the side wall of the back plate 100 is provided with a recess extending toward the outside of the backlight module with respect to the light entrance of the light guide plate, and the light source light bar 140 is disposed at The light is internally coupled to the light guide plate 120, and part or all of the light bar 140 is disposed in the recess.
  • the recesses increase the distance between the LEDs 141 on the light bar 140 and the inner edge 151 of the plastic frame 150, that is, It is said that the value of A is increased, so that the dark band area between the LED on the light bar 140 and the LED light can be effectively eliminated, and the firefly is prevented from occurring in the display area of the liquid crystal display device (ie, the AA area, as shown in FIG. 7). (hotspot) is now as follows Several preferred embodiments of the invention.
  • the backlight module of the liquid crystal display device includes: a back plate 100 , a reflective plate 110 disposed on the back plate 100 , and a reflective plate 110 disposed above the light bar 140 .
  • the outer frame 200 and the like are fixed on the backlight module.
  • the back plate 100 and the side wall of the plastic frame 150 are provided with through holes, and the through holes form a backlight module opposite to the light guide plate 120.
  • a light bar 140 as a light source is disposed in the recess and directly disposed on the flat side wall of the outer frame 200 to fit the side wall of the outer frame 200 due to the side wall of the plastic frame 150 and
  • the sidewall of the backplane 100 is provided with a through hole to form a recess, and the light bar 140 is disposed in the recess to increase the distance of the light bar 140 from the inner edge 151 of the plastic frame 150, thereby increasing the A value, thereby improving the backlight.
  • the optical taste of the module, removing the firefly phenomenon of the liquid crystal display device, or A time to meet the demand in value (ie, firefly phenomenon does not occur), is more conducive to narrow frame design.
  • the distance of d3+d4 is increased.
  • the relatively complicated through holes are not used in the side walls of the back plate 100 and the plastic frame 150 instead of the notches, so as to avoid weakening the structural strength of the back plate 100 and the plastic frame 150 as much as possible.
  • the outer frame 200 may use an aluminum structure or other materials with good heat dissipation properties.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • the second embodiment of the present invention is different from the first embodiment.
  • the light bar 140 of the outer frame 200 is mounted at a mounting portion 210 extending toward the interior of the backlight module.
  • the boss 210 corresponds to the recess formed by the back plate 100 and the through hole on the plastic frame 150, and the depth of the boss 210 The degree is smaller than the sum of the thickness of the side wall of the back plate 100 and the thickness of the side wall of the plastic frame 150, that is, the boss 210 does not protrude from the concave surface of the recess and the boss 210
  • the bottom surface is not flush with the concave surface, and the light bar 140 is mounted on the bottom surface of the boss 210.
  • the purpose of the light bar 140 is to facilitate positioning when the backlight module is assembled, thereby improving assembly precision and assembly efficiency.
  • the dark band formed between the LED on the light bar 140 and the LED appears in the display area of the liquid crystal display device (ie, the AA area), thereby improving the backlight mode.
  • the outer frame 200 is made of an aluminum structure or other material having good heat dissipation properties.
  • Embodiment 3 is a diagrammatic representation of Embodiment 3
  • FIG. 6 is a third embodiment of the present invention.
  • the backlight module of the liquid crystal display device includes: a back plate 100, a reflective plate 110 disposed on the back plate 100, and a reflective plate 110.
  • the optical film 130 is disposed on the light emitting surface of the light guide plate 120, and the liquid crystal
  • the panel 300 is fixed on the upper side of the backlight module by components such as the plastic frame 150 and the outer frame 200;
  • a through groove is disposed on a sidewall of the plastic frame 150 corresponding to the light bar 140.
  • the back plate 100 is provided with a bend 101 at the position, and the bend 101 is not inserted into the through groove on the sidewall of the plastic frame 150.
  • the light bar 140 is directly mounted on the bend 101 of the back plate 100, so that a recess extending toward the outside of the backlight module with respect to the light incident surface of the light guide plate 120 is formed at the mounting position of the light bar 140, so that A It is worth increasing to prevent the firefly phenomenon from occurring in the display area (ie, the AA area) of the liquid crystal display device. As shown in FIG.
  • the dark band formed between the LED on the light bar 140 and the LED appears in the display area of the liquid crystal display device (ie, the AA area), thereby improving the backlight mode.
  • the light bar 140 is mounted on the back plate 100, in order to improve the heat dissipation of the backlight module.
  • the back plate 100 can use aluminum or other materials with good heat dissipation performance
  • the outer frame 200 can also use a heat-dissipating material such as aluminum to increase the heat dissipation path of the backlight module, because of the direct contact with the back plate 100. Improve heat dissipation efficiency.

Landscapes

  • 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)

Abstract

一种背光模组及液晶显示装置,包括导光板(120)、光源(140)以及背板(100),所述背板(100)的侧壁上设置有相对于所述导光板(120)入光面向背光模组外部延伸的凹陷,所述光源(140)设置在所述凹陷处。由于在背光模组上固定光源(140)的位置设置有凹陷,通过此凹陷,使得光源(120)相对胶框(150)的内沿(151)的距离增大,也就是说,A值得到增大,进而可以有效的消除光源(140)上的发光源之间的光线之间的暗带区域,避免了在液晶显示装置的显示区域发生萤火虫现象。同时,在扩大A值后,为了使液晶显示装置窄边框化,可以选用相应的A值,即不发生萤火虫现象的临界值到通过凹陷获得的最大A值之间,从而使得液晶显示装置的边框更窄,使得液晶显示装置的显示区域得到加大。

Description

【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。 随着液晶显示装置的 窄边框化, 导致背光模组的 A值越来越小, 并且液晶显示装置一般选用 LED这 样的点光源提供足够亮度, 由此带来另外的一些问题如萤火虫现象。 如图 3 所 示, A值为 LED141到液晶显示装置示区域(即 AA区)的长度, 即如图 1所示 为 LED141到胶框 150的内沿端部位置处的距离; 由于 A值的减小, 带来的问 题是萤火虫(hotspot )的产生, 即如图 3所示, 在液晶显示装置的显示区域(即 AA区)靠近灯条 140的边缘处, 由于 A值较小, LED141发出的光线以一定的 角度射出, 多个 LED141 之间会出现光线照不到的区域形成暗带, 这样一亮一 暗交替的从上往下排布的现象即为萤火虫现象, 严重影响了背光模组的光学品 味以及液晶显示装置的显示效果。
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侧壁上的灯 条 140、 与灯条 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之间形成空气腔 180, 起到隔热作用。 同样的, 该种结构的 背光模组同样面临窄边框化所带来的 A值减小问题, 若进行窄边框化设计超出 A值允许范围, 也就是由于 LED141的位置固定, 导光板 120的位置与 LED141 的距离将减小, 从而导致 A值减小, 在液晶显示装置的显示区域内形成萤火虫 现象进而影响到背光模组的光学品味以及液晶显示装置的显示效果。
【发明内容】
本发明所要解决的技术问题是提供一种边框窄, 显示效果良好的背光模组 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, 包括导光板、 一排点光源以及背板, 所述背板的侧壁上设置有相对于所述导光板入光面向背 光模组外部延伸的凹陷, 所述光源设置在所述凹陷处。
优选的, 所述背板的侧壁上的凹陷为设置在背板侧壁上的通孔。 通孔容易 加工, 并且方便定位光源, 利用通孔在背板上的侧壁上形成凹陷, 使光源能安 装在通孔内, 增大背光模组的 A值。
优选的, 所述背光模组包括有胶框, 所述胶框的侧壁上对应于所述通孔的 位置也设置有凹陷。 胶框上也设置凹陷, 可进一步提背光模组的 A值。
优选的, 所述背光模组包括有外框, 所述胶框上的凹陷为设置在胶框的侧 壁上的通孔, 所述光源设置在所述外框的平整的侧壁上。 通孔容易加工, 并且 方便定位光源。
优选的, 所述背光模组包括有外框, 所述胶框上的凹陷为设置在胶框侧壁 上的通孔, 所述外框的侧壁上对应于所述胶框侧壁上的通孔的位置处设置有向 背光模组内部延伸的凸台, 所述凸台的深度小于所述背板的侧壁的厚度及胶框 的侧壁的厚度之和, 所述光源设置在所述凸台上。 设置凸台的目的是为了在背 光模组组装的时候便于定位, 提高组装的精确性以及组装的效率。
优选的, 所述背板的侧壁上的 陷为背板的侧壁上的弯折, 所述光源设置 在所述弯折上。 在背板上设置弯折形成凹陷, 相对于通孔的方式, 可避免背板 的强度降低。
优选的, 所述背光模组包括有胶框, 所述胶框的侧壁上对应于所述通孔的 位置也设置有凹陷。 可增大背光模组的 A值。
优选的, 所述胶框的侧壁上的凹陷为设置在胶框的侧壁上的通孔, 所述背 板的侧壁上的弯折没入所述胶框的侧壁上的通孔内, 所述光源设置在所述弯折 上。 利用背板上的弯折与胶框上的通孔配合, 形成向背光模组外部延伸的凹陷, 进而提高背光模组的 A值。
优选的, 所述点光源为 LED灯条。 LED发光亮度高, 耗能小。
优选的, 所述背板材质为散热性良好的材质。 由于光源固定在背板上, 通 过背板可以散热, 所以背板选用散热性良好的材质可以提高背光模组的散热效 率。
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的背板的侧壁上设置有相对于导光板入光面向背光 模组外部延伸的凹陷, 并将光源设置在此凹陷内, 通过此凹陷, 使得光源相对 胶框的内沿的距离增大, 也就是说, A值得到增大, 进而可以有效的消除点光 源上的发光源之间的光线之间的暗带区域, 避免了在液晶显示装置的显示区域 发生萤火虫 (hotspot)现象。同时,在扩大 A值后,为了使液晶显示装置窄边框化, 可以选用相应的 A值, 即不发生萤火虫现象的临界值到通过凹陷获得的最大 A 值之间, 从而使得液晶显示装置的边框更窄, 使得液晶显示装置的显示区域得 到加大。
【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是现有背光模组的 A值情况及萤火虫发生区域示意图,
图 4是本发明实施例一背光模组的结构筒图,
图 5是本发明实施例二背光模组的结构筒图,
图 6是本发明实施例三背光模组的结构筒图,
图 7是本发明实施例一、 实施例二及实施例三背光模组的 A值情况及萤火 虫发生区域示意图。
其中: 100、 背板, 101、 弯折, 110、 反射板, 120、 导光板, 130、 光学膜 片, 140、 光源, 150、 胶框, 170、 支持件, 180、 空气腔, 190、 导热板, 141、 LED, 142、 PCB, 151、 内沿, 200、 外框, 210、 凸台, 300、 液晶面板。
【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 4-6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、置于反射板 110之上并与灯条 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; 其中, 背板 100 的侧壁上设置有相对于导光板入 光面向背光模组外部延伸的凹陷, 而点光源灯条 140设置在所述凹陷内并与导 光板 120光耦合, 灯条 140部分或全部结构处于该凹陷内, 通过此凹陷, 使得 灯条 140上的 LED141相对胶框 150的内沿 151的距离增大,也就是说, A值增 大,进而可以有效的消除灯条 140上的 LED与 LED光线之间的暗带区域,避免 了在液晶显示装置的显示区域(即 AA区, 如图 7所示 )发生萤火虫 (hotspot)现 以下为本发明的几个较佳实施例。
实施例一: 如图 4所示为本发明的实施例一,液晶显示装置的背光模组包括:背板 100、 置于背板 100之上的反射板 110、置于反射板 110之上并与灯条 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; 其中, 背板 100以及胶框 150的侧壁上设置有通 孔, 所述通孔形成了相对于导光板 120 的入光面向背光模组外部延伸的凹陷, 作为光源的灯条 140设置在该凹陷内, 并直接设置在了外框 200的平整的侧壁 上, 与外框 200的侧壁贴合, 由于胶框 150的侧壁以及背板 100的侧壁上设置 有通孔形成了凹陷, 而灯条 140设置在该凹陷内使灯条 140距离胶框 150的内 沿 151的距离增大, 从而增大 A值, 进而提高背光模组的光学品味, 去除液晶 显示装置的萤火虫现象, 或者, 在 A值满足需求(即不发生萤火虫现象) 时, 更有利于窄边框化的设计。 假设 LED141的厚度为 dl , PCB142的厚度为 d2, 背板 100的侧壁厚度为 d3, 胶框 150的侧壁厚度为 d4, 则与图 1所示的现有背 光模组相比, 在本实施例中, A值增大的大小约为: A Sl=Sl-S0= d3+d4, 这样, 本实施例中的 A值 S1相对图 1所示的现有别个模组 A值 SO增大了 d3+d4的距 离,这样,由于 A值 S1的增大,使得暗带出现在了液晶显示装置的显示区域(即 AA区外)如图 7所示, 从而提高了背光模组的光学品味以及液晶显示装置的显 示效果。
本实施例中, 背板 100及胶框 150侧壁上之所以选用加工相对复杂的通孔 而非凹口, 目的在于尽量避免削弱背板 100及胶框 150的结构强度。
在本实施例中, 由于灯条 140直接设置在外框 200上, 为了提高背光模组 的散热效率, 外框 200可以使用铝材结构或者其它散热性能良好的材料。
实施例二:
如图 5 所示为本发明的实施例二, 与实施例一不同的是, 在本实例中, 外 框 200的灯条 140安装处, 设置有一向背光模组内部延伸的凸台 210, 该凸台 210与背板 100以及胶框 150上的通孔所形成的凹陷相对应,所述凸台 210的深 度小于所述背板 100的侧壁的厚度及胶框 150的侧壁的厚度之和, 也就是说, 所述凸台 210不凸出于所述凹陷的凹陷面且所述凸台 210的底面不与所述凹陷 面平齐, 而灯条 140则安装在所述凸台 210的底面, 这样做的目的是为了在背 光模组组装的时候便于定位, 提高组装的精确性以及组装的效率。 如图 5 中所 示, 本实施例二中背光模组的 A值 S2相对于图 1所示的现有背光模组的 A值 SO, 约增大了 A S2=S2-S0=dl+d2。 同样的, 在此情况下, 如图 7所示, 灯条 140 上的 LED与 LED之间所形成的暗带出现在了液晶显示装置的显示区域(即 AA 区)夕卜, 从而提高背光模组的光学品味以及液晶显示装置的显示效果。
同样的, 由于灯条 140安装在了外框 200上, 为了提高背光模组的散热效 率, 外框 200使用的是铝材结构或者其它散热性能良好的材料。
实施例三:
如图 6所示为本发明的实施例三, 在本实施例中, 液晶显示装置的背光模 组包括: 背板 100、 置于背板 100之上的反射板 110、 置于反射板 110之上并与 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; 其中,
胶框 150的侧壁上对应于灯条 140的安装位置处设置有通槽, 背板 100在 该位置处设置有弯折 101 , 该弯折 101没入胶框 150的侧壁上的通槽内, 而灯条 140在则直接安装在背板 100的弯折 101上,这样就在灯条 140的安装位置处形 成了相对于导光板 120的入光面向背光模组外部延伸的凹陷, 使得 A值得以增 大, 从而避免萤火虫现象在液晶显示装置的显示区域(即 AA 区) 内发生。 如 图 6中所示,本实施例二中背光模组的 A值 S3相对于图 1所示现有背光模组的 A值 SO, 约增大了 A S3=S3-S0=d3。 同样的, 在此情况下, 如图 7所示, 灯条 140上的 LED与 LED之间所形成的暗带出现在了液晶显示装置的显示区域(即 AA区)夕卜, 从而提高背光模组的光学品味以及液晶显示装置的显示效果。
在本实施例中, 灯条 140安装在了背板 100上, 为了提高背光模组的散热 性能, 背板 100可使用散热性能良好的铝材或其他材料, 而外框 200由于与背 板 100直接接触, 也可以使用散热性能良好的材料如铝材, 增加背光模组的散 热途径, 从而提高散热效率。
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: 外框、 胶框、 导光板、 一排点光源以及背板, 所 述背板的侧壁上设置有弯折, 所述胶框的侧壁上对应于所述弯折的位置设置有 通槽, 所述背板的侧壁上的弯折没入所述胶框的侧壁上的通槽内, 所述光源设 置在所述弯折上。
2、 一种背光模组, 包括: 导光板、 一排点光源以及背板, 所述背板的侧壁 上设置有相对于所述导光板入光面向背光模组外部延伸的凹陷, 所述光源设置 在所述凹陷处。
3、 如权利要求 2所述的一种背光模组, 其中, 所述背板的侧壁上的凹陷为 设置在背板侧壁上的通孔。
4、 如权利要求 3所述的一种背光模组, 其中, 所述背光模组包括有胶框, 所述胶框的侧壁上对应于所述通孔的位置也设置有凹陷。
5、 如权利要求 4所述的一种背光模组, 其中, 所述背光模组包括有外框, 所述胶框上的凹陷为设置在胶框的侧壁上的通孔, 所述光源设置在所述外框的 平整的侧壁上。
6、 如权利要求 4所述的一种背光模组, 其中, 所述背光模组包括有外框, 所述胶框上的凹陷为设置在胶框侧壁上的通孔, 所述外框的侧壁上对应于所述 胶框侧壁上的通孔的位置处设置有向背光模组内部延伸的凸台, 所述凸台的深 度小于所述背板的侧壁的厚度及胶框的侧壁的厚度之和, 所述光源设置在所述 凸台上。
7、 如权利要求 2所述的一种背光模组, 其中, 所述背板的侧壁上的凹陷为 背板的侧壁上的弯折, 所述光源设置在所述弯折上。
8、 如权利要求 7所述的一种背光模组, 其中, 所述背光模组包括有胶框, 所述胶框的侧壁上对应于所述弯折的位置也设置有凹陷。
9、 如权利要求 8所述的一种背光模组, 其中, 所述胶框的侧壁上的凹陷为 设置在胶框的侧壁上的通槽, 所述背板的侧壁上的弯折没入所述胶框的侧壁上 的通槽内, 所述光源设置在所述弯折上, 所述背板材质为散热性能良好的材质。
10、 如权利要求 1所述的一种背光模组, 其中, 所述点光源为 LED灯条。
11、 一种液晶显示装置, 包括背光模组, 所述背光模组包括导光板、 一排 点光源以及背板, 所述背板的侧壁上设置有相对于所述导光板入光面向背光模 组外部延伸的凹陷, 所述光源设置在所述凹陷处。
12、 如权利要求 11所述的一种液晶显示装置, 其中, 所述背板的侧壁上的 凹陷为设置在背板侧壁上的通孔。
13、 如权利要求 12所述的一种液晶显示装置, 其中, 所述背光模组包括有 胶框, 所述胶框的侧壁上对应于所述通孔的位置也设置有凹陷。
14、 如权利要求 13所述的一种液晶显示装置, 其中, 所述背光模组包括有 外框, 所述胶框上的凹陷为设置在胶框的侧壁上的通孔, 所述光源设置在所述 外框的平整的侧壁上。
15、 如权利要求 13所述的一种液晶显示装置, 其中, 所述背光模组包括有 外框, 所述胶框上的凹陷为设置在胶框侧壁上的通孔, 所述外框的侧壁上对应 于所述胶框侧壁上的通孔的位置处设置有向背光模组内部延伸的凸台, 所述凸 台的深度小于所述背板的侧壁的厚度及胶框的侧壁的厚度之和, 所述光源设置 在所述凸台上。
16、 如权利要求 11所述的一种液晶显示装置, 其中, 所述背板的侧壁上的 凹陷为背板的侧壁上的弯折, 所述光源设置在所述弯折上。
17、 如权利要求 16所述的一种液晶显示装置, 其中, 所述背光模组包括有 胶框, 所述胶框的侧壁上对应于所述通孔的位置也设置有凹陷。
18、 如权利要求 17所述的一种液晶显示装置, 其中, 所述胶框的侧壁上的 凹陷为设置在胶框的侧壁上的通槽, 所述背板的侧壁上的弯折没入所述胶框的 侧壁上的通槽内, 所述光源设置在所述弯折上。
19、 如权利要求 18所述的一种液晶显示装置, 其中, 所述背板材质为散热 性能良好的材质。
20、如权利要求 11所述的一种液晶显示装置, 其中, 所述点光源为 LED灯 条。
PCT/CN2012/073323 2012-03-27 2012-03-30 一种背光模组及液晶显示装置 WO2013143123A1 (zh)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US13/503,096 US20130257705A1 (en) 2012-03-27 2012-03-30 Backlight Module and LCD Device
DE112012005830.5T DE112012005830T5 (de) 2012-03-27 2012-03-30 Hintergrundbeleuchtungsmodul und eine Flüssigkristall-Anzeigevorrichtung

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201210082715.7 2012-03-27
CN201210082715.7A CN102620203B (zh) 2012-03-27 2012-03-27 一种背光模组及液晶显示装置

Publications (1)

Publication Number Publication Date
WO2013143123A1 true WO2013143123A1 (zh) 2013-10-03

Family

ID=46560307

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2012/073323 WO2013143123A1 (zh) 2012-03-27 2012-03-30 一种背光模组及液晶显示装置

Country Status (3)

Country Link
CN (1) CN102620203B (zh)
DE (1) DE112012005830T5 (zh)
WO (1) WO2013143123A1 (zh)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202835056U (zh) * 2012-09-29 2013-03-27 深圳市华星光电技术有限公司 背光模组及液晶显示装置
CN102865528A (zh) * 2012-10-18 2013-01-09 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
CN102998844A (zh) * 2012-11-28 2013-03-27 深圳市华星光电技术有限公司 一种液晶模组及液晶显示装置
CN103216790B (zh) * 2013-04-25 2016-03-30 深圳市华星光电技术有限公司 液晶背光模组及其固定组件
CN103439831B (zh) * 2013-08-05 2016-03-30 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
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
KR102156609B1 (ko) * 2013-12-23 2020-09-17 엘지디스플레이 주식회사 디스플레이 장치
CN103838036B (zh) * 2014-03-21 2016-05-04 深圳市华星光电技术有限公司 曲面液晶显示装置
CN103823321B (zh) * 2014-03-21 2016-07-06 深圳市华星光电技术有限公司 曲面液晶显示装置
CN107247364B (zh) * 2017-07-27 2021-01-26 京东方科技集团股份有限公司 一种背光模组及显示装置
CN108319050A (zh) * 2017-07-28 2018-07-24 合肥市惠科精密模具有限公司 一种户外大型tft-lcd显示屏用散热固定装置
CN110109215A (zh) * 2019-05-22 2019-08-09 武汉华星光电技术有限公司 一种背光模组及显示装置
CN110456561A (zh) * 2019-07-29 2019-11-15 武汉华星光电技术有限公司 背光模组和显示模组
CN114690483A (zh) * 2022-04-08 2022-07-01 惠科股份有限公司 背光模组及显示装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007026916A (ja) * 2005-07-19 2007-02-01 Casio Comput Co Ltd 照明装置
JP2007042338A (ja) * 2005-08-01 2007-02-15 Sanyo Epson Imaging Devices Corp 照明装置、電気光学装置及び電子機器
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
CN202158424U (zh) * 2011-04-07 2012-03-07 深圳华映显示科技有限公司 一种背光模块以及液晶显示装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101303479A (zh) * 2007-05-10 2008-11-12 奇美电子股份有限公司 背光模块与液晶显示器
CN101307894B (zh) * 2008-05-29 2010-09-08 京东方科技集团股份有限公司 侧光式发光二极管背光源
KR101274709B1 (ko) * 2008-07-08 2013-06-12 엘지디스플레이 주식회사 액정 표시 장치
CN201983111U (zh) * 2011-02-24 2011-09-21 华映视讯(吴江)有限公司 背光模组

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007026916A (ja) * 2005-07-19 2007-02-01 Casio Comput Co Ltd 照明装置
JP2007042338A (ja) * 2005-08-01 2007-02-15 Sanyo Epson Imaging Devices Corp 照明装置、電気光学装置及び電子機器
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
CN202158424U (zh) * 2011-04-07 2012-03-07 深圳华映显示科技有限公司 一种背光模块以及液晶显示装置

Also Published As

Publication number Publication date
DE112012005830T5 (de) 2014-12-04
CN102620203B (zh) 2014-07-30
CN102620203A (zh) 2012-08-01

Similar Documents

Publication Publication Date Title
WO2013143123A1 (zh) 一种背光模组及液晶显示装置
US7978282B2 (en) Liquid crystal display
WO2011080955A1 (ja) 面状照明装置およびそれを備えた表示装置
US20140176867A1 (en) Edge type backlight module and liquid crystal display for preventing light leakage
WO2012159331A1 (zh) 显示装置及背光模组
WO2013143156A1 (zh) 背光模组、液晶显示装置及背光模组的光源
WO2012151770A1 (zh) 液晶显示装置及其后壳
WO2013143180A1 (zh) 背光模组
US8836894B2 (en) Backlight unit and liquid crystal display device
KR20160111514A (ko) 디스플레이 모듈 구조 및 그 장착방법
JP2012054108A (ja) 表示装置
WO2014019258A1 (zh) 侧入式背光模组
WO2013143128A1 (zh) 背光模组及使用该背光模组的液晶显示装置
WO2014040308A1 (zh) 液晶显示装置
WO2013166747A1 (zh) 背光模组
CN106405913A (zh) 一种液晶显示装置
WO2013143154A1 (zh) 一种显示装置的外框、背光模组及液晶显示装置
WO2013177817A1 (zh) 背光模组
WO2015135239A1 (zh) 背光模组
US8690409B2 (en) Backlight assembly and display apparatus having the same
US10429578B2 (en) Plastic frame assembly, backlight source and display apparatus
CN210835510U (zh) 一种背光模组及显示装置
WO2013037144A1 (zh) 一种一体化液晶显示装置
WO2014075357A1 (zh) 一种采用直下式背光的液晶模组及液晶显示器
TWM343818U (en) Heat dissipation structure of backlight module

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 13503096

Country of ref document: US

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 12872490

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 1120120058305

Country of ref document: DE

Ref document number: 112012005830

Country of ref document: DE

122 Ep: pct application non-entry in european phase

Ref document number: 12872490

Country of ref document: EP

Kind code of ref document: A1