WO2013131313A1 - 一种液晶显示装置 - Google Patents
一种液晶显示装置 Download PDFInfo
- Publication number
- WO2013131313A1 WO2013131313A1 PCT/CN2012/074818 CN2012074818W WO2013131313A1 WO 2013131313 A1 WO2013131313 A1 WO 2013131313A1 CN 2012074818 W CN2012074818 W CN 2012074818W WO 2013131313 A1 WO2013131313 A1 WO 2013131313A1
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- WIPO (PCT)
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- liquid crystal
- crystal display
- display device
- heat dissipation
- light bar
- Prior art date
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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
- G02B6/0085—Means for removing heat created by the light source from the package
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133628—Illuminating devices with cooling means
Definitions
- the present invention relates to the field of liquid crystal display, and more particularly to a liquid crystal display device. ⁇ Background technique ⁇
- the LED adopts a reflective light-injecting mode, and a reflective cavity is formed between the LED surface of the LED and the reflective surface and the LGP.
- the light emitted by the LED is first reflected by the reflective surface into the LGP, as shown in FIG. After the reflection cavity is fully mixed, the phenomenon of light and dark interval (HOT SPOT) can be alleviated.
- the reflective surface can be placed on the middle frame or bent from the back plate. Since the internal structure of the backlight module is tight, the heat dissipation is mainly performed by heat conduction, and the PCB board of the LED light bar is flatly attached to the back plate, thereby expanding the contact surface and guiding the heat away. However, the reflective cavity is tightly structured, and the air heat flow cannot be derived, failing to form an effective convective heat transfer.
- the technical problem to be solved by the present invention is to provide a liquid crystal display device with good heat dissipation effect.
- a liquid crystal display device includes a frame body, a light bar, a light guide plate and a reflecting surface are disposed in the frame body, and a narrow reflecting cavity is formed between the light bar reflecting surface and the light guiding plate, and the frame body is in the reflective cavity The corresponding position of the end is provided with a heat dissipation hole communicating with the outside of the liquid crystal display device.
- the liquid crystal display device comprises a sky side, a ground side, a left side and a right side, and the light bar is disposed on either or both sides of the left side or the right side.
- the liquid crystal display device is placed vertically, so that the left and right sides of the liquid crystal display device are vertically placed, and the light bar is placed at these two positions, and the heat dissipation hole and the reflection cavity can form a natural "chimney", which has better heat dissipation effect. .
- the heat dissipation holes at either end of the reflective cavity are not less than two. Opening a plurality of heat dissipation holes can reduce the aperture of a single heat dissipation hole while ensuring the heat dissipation effect, thereby preventing large particles of dust from entering the inside of the device and improving the protection level of the device.
- the heat dissipation hole is one or more of a circular shape, a polygonal shape, and a trapezoidal shape. This is the shape of the heat dissipation hole, and the shape of the heat dissipation hole can be determined according to the specific processing conditions and the aesthetics of the overall design.
- the frame comprises a front frame, a middle frame and a back plate, and the heat dissipation holes are disposed on any one or more of the front frame, the middle frame or the back plate.
- the heat dissipation holes may be disposed on different frames.
- the frame comprises a backboard
- the light bar is fixed on the backboard
- the backboard is provided with a duct at the bottom of the fixed strip, and at both ends of the strip, and the liquid crystal panel of the liquid crystal display device
- the opposite end positions are provided with heat dissipation holes communicating with the air passages. Since the heat dissipation hole faces the direction of the liquid crystal panel, it is concealed inside the liquid crystal display device, and the protection level is high, especially the liquid crystal display device corresponding to the light bar on the left and right sides, and the foreign matter falls on the top of both sides, and does not fall into the heat dissipation. Hole, enter the inside of the device.
- the frame comprises a front frame and a back plate, and the heat dissipation hole is surrounded by the front frame and the back plate.
- the frame body comprises a middle frame and a back plate, and the heat dissipation holes are surrounded by the middle frame and the back plate.
- the frame body is attached with a waterproof gas permeable membrane at a corresponding position of the heat dissipation hole.
- the waterproof and breathable membrane can prevent moisture and dust from entering the interior of the liquid crystal display device, improve the protection level of the device, and reflect the light in the reflective cavity to prevent light leakage.
- the waterproof gas permeable membrane is white.
- White does not absorb light, which further enhances the reflection effect and improves light utilization.
- the inventors have found that a reflective cavity is formed between the light bar and the reflective surface and the light guide plate (LGP). Taking the LED strip as an example, a large part of the LED chip is radiated from the surface of the LED, so that the temperature of the air in the reflective cavity rises. .
- the backlight module is generally used vertically.
- the present invention opens a heat dissipation hole in the frame at the open end of the reflection cavity, thereby forming a "chimney effect", that is, the hot air rapidly rises and is discharged from the top hole, and The bottom quickly replenishes cold air from the hole to accelerate convective heat transfer and improve heat dissipation.
- FIG. 1 is a schematic view of a reflective cavity of a liquid crystal display device
- Figure 2 is a schematic view of the principle of the present invention
- 3 is a schematic view of the heat dissipation hole of the present invention enclosed by different frames
- FIG. 4 is a schematic view showing a plurality of heat dissipation holes of the present invention.
- Figure 5 is a schematic view showing the heat dissipation hole of the present invention opened on the middle frame
- FIG. 6 is a schematic view showing the heat dissipation hole of the present invention opened on the back plate;
- 100 reflective surface; 200, frame; 210, middle frame; 220, back plate; 300, light bar; 400, reflective cavity; 500, light guide plate; 600, heat dissipation hole.
- a liquid crystal display device includes a frame body 200.
- the light bar 300, the light guide plate 500, and the reflective surface 100 are disposed in the frame 200.
- the reflective surface 400 is formed between the reflective surface 100 of the light bar 300 and the light guide plate 500.
- the frame body 200 is provided with a heat dissipation hole 600 communicating with the outside of the liquid crystal display device at corresponding positions on both ends of the reflection cavity 400.
- the liquid crystal display device includes a sky side, a ground side, a left side, and a right side, and the light bar 300 is disposed on either or both sides of the left side or the right side. Generally, the left and right sides of the liquid crystal display device are vertically placed, thereby dissipating heat.
- the hole 600 and the reflecting cavity 400 can form a natural "chimney" (as shown in FIG. 2), and the heat dissipation effect is better.
- the frame 200 includes a front frame, a middle frame 210, and a back plate 220.
- the heat dissipation holes 600 may be disposed on different frames 200 according to the structure of the liquid crystal display device frame 200.
- the heat dissipation holes 600 may also be enclosed by different frames 200, such as the front frame and the back plate 220, or the middle frame 210 and the back plate 220.
- FIG. 3 is a middle frame 210 and a back plate 220.
- the structure surrounding the heat dissipation hole 600 is disposed on different frames 200 according to the structure of the liquid crystal display device frame 200.
- the heat dissipation holes 600 may also be enclosed by different frames 200, such as the front frame and the back plate 220, or the middle frame 210 and the back plate 220.
- FIG. 3 is a middle frame 210 and a back plate 220. The structure surrounding the heat dissipation hole 600.
- the heat dissipation holes 600 at either end of the reflection cavity 400 are not less than two.
- only one heat dissipation hole 600 is opened at each end. Opening a plurality of heat dissipation holes 600 can reduce the aperture of the single heat dissipation hole 600 while ensuring the heat dissipation effect, thereby preventing large particles of dust from entering the inside of the device and improving the protection level of the device.
- the shape of the heat dissipation hole 600 can also be varied, such as a circle, a polygon, a trapezoid, etc., and the shape of the heat dissipation hole 600 can be determined according to specific processing conditions and the aesthetics of the overall design.
- a white waterproof gas permeable membrane may be attached to the corresponding position of the heat dissipation hole 600 of the frame body 200. On the one hand, it can prevent moisture and dust from entering the inside of the liquid crystal display device, improve the protection level of the device, and reflect the light in the reflective cavity 400 to prevent light leakage.
- the light bar of another heat dissipation hole 600 is fixed on the back plate 220 , and the back plate 220 is provided with a air channel at the bottom of the light bar 300 fixed, and is displayed on both ends of the light bar 300 and the liquid crystal display.
- the opposite end of the liquid crystal panel of the device is provided with a heat dissipation hole 600 communicating with the air channel. Since the heat dissipation hole 600 faces the liquid crystal panel, it is concealed inside the liquid crystal display device, and the protection level is high, especially the corresponding light bar 300.
- the liquid crystal display devices on the left and right sides have foreign objects falling on the tops of both sides, and will not fall into the heat dissipation holes 600 and enter the inside of the device.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Planar Illumination Modules (AREA)
- Liquid Crystal (AREA)
Abstract
一种液晶显示装置,包括框体(200),框体(200)内设有灯条(300)、导光板(500)、反射面(100),所述灯条(300)反射面(100)和导光板(500)之间形成狭长的反射腔(400),所述框体(200)在所述反射腔(400)两端对应位置设有跟液晶显示装置外连通的散热孔(600)。在反射腔(400)的两端开放处的框体(200)上开散热孔(600),从而形成"烟囱效应",即热空气迅速往上升,从顶部孔排出,又可以在底部迅速从孔处补充冷空气,加速对流换热,提升了散热效果。
Description
一种液晶显示装置
【技术领域】
本发明涉及液晶显示领域, 更具体的说, 涉及一种液晶显示装置。 【背景技术】
背光模组中, LED采用反射式入光方式, LED的 PCB表面与反射面、 LGP 之间形成反射腔, LED射出的光先经过反射面反射进入到 LGP, 如图 1示, 光 线经过这种反射腔后得到充分混光,从而可减轻亮暗间隔( HOT SPOT )的现象。 反射面可以放置于中框上, 也可以由背板折弯成型。 由于背光模组内部结构结 构紧密, 散热主要通过热传导方式进行, LED灯条的 PCB板平贴于背板上, 从而可扩大接触面, 把热导走。 而反射腔受至于结构紧密, 空气热流无法导出, 未能形成有效的对流换热。
【发明内容】
本发明所要解决的技术问题是提供一种散热效果好的液晶显示装置。
本发明的目的是通过以下技术方案来实现的:
一种液晶显示装置, 包括框体, 框体内设有灯条、 导光板、 反射面, 所述 灯条反射面和导光板之间形成狭长的反射腔, 所述框体在所述反射腔两端对应 位置设有跟液晶显示装置外连通的散热孔。
优选的, 所述液晶显示装置包括天侧、 地侧、 左侧以及右侧, 所述灯条设 置在左侧或右侧中的任意一侧或两侧。 一般液晶显示装置是竖直放置, 这样液 晶显示装置的左右两侧也就竖直放置, 灯条放置在这两个位置上, 散热孔跟反 射腔可以组成天然的 "烟囱", 散热效果更好。
优选的, 所述反射腔任意一端的散热孔不少于两个。 开多个散热孔可以在 保障散热效果的同时缩小单个散热孔的孔径, 这样就可以防止大颗粒的尘埃进 入装置内部, 提升装置的防护等级。
优选的, 所述散热孔为圓形、 多边形、 梯形中的一种或多种。 此为散热孔 的形状, 可以根据具体加工条件和整体设计的美观性来决定散热孔的形状。
优选的, 所述框体包括前框、 中框和背板, 所述散热孔设置在所述前框、 中框或背板任意一个或多个上。 此为框体的具体形式, 根据液晶显示装置框体 结构的不同, 散热孔可以设置在不同的框体上。
优选的, 所述框体包括背板, 所述灯条固定在背板上, 所述背板在灯条固 定的底部设有风道, 并在灯条两端、 与液晶显示装置的液晶面板相对的端部位 置设有与所述风道相通的散热孔。 由于散热孔面对液晶面板方向, 隐蔽在液晶 显示装置的内侧, 防护等级高, 特别是对应灯条位于左右两侧的液晶显示装置, 位于两侧顶部有异物掉落, 也不会掉入散热孔, 进入装置内部。
优选的, 所述框体包括前框和背板, 所述散热孔由前框和背板围成。
优选的, 所述框体包括中框和背板, 所述散热孔由中框和背板围成。
优选的, 所述框体在散热孔对应位置帖附有防水透气膜。 防水透气膜可以 提升防止水气、 灰尘进入液晶显示装置的内部, 提升了装置的防护等级, 并且 能反射反射腔内的光线, 防止漏光。
优选的, 所述防水透气膜为白色。 白色不易吸收光线, 可进一步增强反射 效果, 提高光线利用率。
发明人研究发现, 灯条与反射面、 导光板(LGP )之间形成反射腔, 以灯条 采用 LED为例, LED的芯片很大一部分由 LED表面辐射出去, 从而反射腔的 空气温度升高。 而背光模组一般要竖直使用, 本发明在反射腔的两端开放处的 框体上开散热孔, 从而形成 "烟囱效应", 即热空气迅速往上升, 从顶部孔排出, 又可以在底部迅速从孔处补充冷空气, 加速对流换热, 提升了散热效果。
【附图说明】
图 1是液晶显示装置反射腔示意图;
图 2是本发明原理示意图;
图 3是本发明散热孔由不同框体围成的示意图;
图 4是本发明开设多个散热孔的示意图;
图 5是本发明散热孔开设在中框上的示意图;
图 6是; 本发明散热孔开设在背板上的示意图;
其中: 100、 反射面; 200、 框体; 210、 中框; 220、 背板; 300、 灯条; 400、 反射腔; 500、 导光板; 600、 散热孔。
【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。
一种液晶显示装置, 包括框体 200, 框体 200内设有灯条 300、 导光板 500、 反射面 100,所述灯条 300反射面 100和导光板 500之间形成狭长的反射腔 400, 所述框体 200在所述反射腔 400两端对应位置设有跟液晶显示装置外连通的散 热孔 600。 液晶显示装置包括天侧、 地侧、 左侧以及右侧, 灯条 300设置在左侧 或右侧中的任意一侧或两侧, 一般液晶显示装置的左右侧是竖直放置的, 这样 散热孔 600跟反射腔 400可以组成天然的 "烟囱" (如图 2所示 ), 散热效果更 好。
框体 200包括前框、 中框 210和背板 220, 根据液晶显示装置框体 200结构 的不同, 散热孔 600可以设置在不同的框体 200上。 散热孔 600也可以由不同 的框体 200围成, 比如前框和背板 220围成, 或者是中框 210和背板 220围成, 图 3即为一种由中框 210和背板 220围成散热孔 600的结构。
进一步的, 如图 4所示, 反射腔 400任意一端的散热孔 600不少于两个, 当然也可以如图 5—样, 每一端只开一个散热孔 600。 开多个散热孔 600可以在 保障散热效果的同时缩小单个散热孔 600 的孔径, 这样就可以防止大颗粒的尘 埃进入装置内部, 提升装置的防护等级。 散热孔 600 的形状也可以多样化, 如 圓形、 多边形、 梯形等, 可以根据具体加工条件和整体设计的美观性来决定散 热孔 600的形状。
进一步的, 可以在框体 200散热孔 600对应位置帖附白色防水透气膜。 一 方面可以防止水气、 灰尘进入液晶显示装置的内部, 提升了装置的防护等级, 并且能反射反射腔 400内的光线, 防止漏光。
如图 6所示为另一种散热孔 600的开设方式灯条固定在背板 220上, 背板 220在灯条 300固定的底部设有风道, 并在灯条 300两端、 与液晶显示装置的液 晶面板相对的端部位置设有与所述风道相通的散热孔 600,由于散热孔 600面对 液晶面板方向, 隐蔽在液晶显示装置的内侧, 防护等级高, 特别是对应灯条 300 位于左右两侧的液晶显示装置, 位于两侧顶部有异物掉落, 也不会掉入散热孔 600, 进入装置内部。
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
1、 一种液晶显示装置, 包括框体, 框体内设有灯条、 导光板、 反射面, 所 述灯条反射面和导光板之间形成狭长的反射腔, 所述框体在所述反射腔两端对 应位置设有跟液晶显示装置外连通的散热孔; 所述液晶显示装置包括天侧、 地 侧、 左侧以及右侧, 所述灯条设置在左侧或右侧中的任意一侧或两侧; 所述反 射腔任意一端的散热孔不少于两个; 所述散热孔为圓形、 多边形、 梯形中的一 种或多种; 所述灯条固定在背板上, 所述背板在灯条固定的底部设有风道, 并 在灯条两端、 与液晶显示装置的液晶面板相对的端部位置设有与所述风道相通 的散热孔; 所述框体在散热孔对应位置帖附有白色防水透气膜。
2、 一种液晶显示装置, 包括框体, 框体内设有灯条、 导光板、 反射面, 所 述灯条反射面和导光板之间形成狭长的反射腔, 所述框体在所述反射腔两端对 应位置设有跟液晶显示装置外连通的散热孔。
3、 如权利要求 2所述的一种液晶显示装置, 其中, 所述液晶显示装置包括 天侧、 地侧、 左侧以及右侧, 所述灯条设置在左侧或右侧中的任意一侧或两侧。
4、 如权利要求 2所述的一种液晶显示装置, 其中, 所述反射腔任意一端的 散热孔不少于两个。
5、 如权利要求 2所述的一种液晶显示装置, 其中, 所述散热孔为圓形、 多 边形、 梯形中的一种或多种。
6、 如权利要求 2所述的一种液晶显示装置, 其中, 所述框体包括前框、 中 框和背板, 所述散热孔设置在所述前框、 中框或背板任意一个或多个上。
7、 如权利要求 2所述的一种液晶显示装置, 其中, 所述框体包括背板, 所 述灯条固定在背板上, 所述背板在灯条固定的底部设有风道, 并在灯条两端、 与液晶显示装置的液晶面板相对的端部位置设有与所述风道相通的散热孔。
8、 如权利要求 2所述的一种液晶显示装置, 其中, 所述框体包括前框和背 板, 所述散热孔由前框和背板围成。
9、 如权利要求 2所述的一种液晶显示装置, 其中, 所述框体包括中框和背 板, 所述散热孔由中框和背板围成。
10、 如权利要求 2所述的一种液晶显示装置, 其中, 所述框体在散热孔对 应位置帖附有防水透气膜。
11、 如权利要求 10所述的一种液晶显示装置, 其中, 所述防水透气膜为白 色。
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WO2018209335A1 (en) | 2017-05-12 | 2018-11-15 | Pure Depth, Inc. | Multi-layered display with interstitial layer air filter |
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KR102264381B1 (ko) * | 2014-12-03 | 2021-06-14 | 엘지디스플레이 주식회사 | 백라이트 유닛 및 이를 구비하는 액정표시장치 |
CN104534359B (zh) * | 2014-12-25 | 2017-10-03 | 武汉天马微电子有限公司 | 一种背光装置 |
CN105717706A (zh) * | 2016-04-28 | 2016-06-29 | 青岛海信电器股份有限公司 | 一种双面背光源及双面显示装置 |
CN107315271A (zh) * | 2017-07-22 | 2017-11-03 | 佛山市正略信息科技有限公司 | 一种可调点间距安全易散热led显示屏 |
CN109270722B (zh) * | 2018-10-26 | 2024-08-27 | 蚌埠国显科技有限公司 | 一种实用型液晶显示模组 |
CN109307953A (zh) * | 2018-10-26 | 2019-02-05 | 蚌埠国显科技有限公司 | 一种含有反光镜的液晶显示模组 |
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