WO2016041286A1 - 背光模组和使用其的液晶显示装置 - Google Patents
背光模组和使用其的液晶显示装置 Download PDFInfo
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- WO2016041286A1 WO2016041286A1 PCT/CN2014/094977 CN2014094977W WO2016041286A1 WO 2016041286 A1 WO2016041286 A1 WO 2016041286A1 CN 2014094977 W CN2014094977 W CN 2014094977W WO 2016041286 A1 WO2016041286 A1 WO 2016041286A1
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- backlight module
- reflector
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- backlight
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- 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
- G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
- G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
- G02B6/0031—Reflecting element, sheet or layer
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V7/00—Reflectors for light sources
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V7/00—Reflectors for light sources
- F21V7/22—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors
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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
- G02F1/133602—Direct backlight
- G02F1/133605—Direct backlight including specially adapted reflectors
Definitions
- the invention relates to a liquid crystal display component, in particular to a backlight module.
- the present invention also relates to a liquid crystal display device using such a backlight module.
- TFT-LCD Thin Film Transistors Display
- the current mainstream backlight module is a side-in type backlight, that is, the backlight lamp is disposed on the side of the backlight, and the light guide plate is used to conduct light to the display area.
- a backlight module may leak light.
- the prior art solution is to attach a light shielding film over the light source lamp.
- Such a light-shielding film has a risk of falling off, and when it is detached, problems such as dark areas of the backlight module may be caused, which may affect the quality of the product.
- the present invention provides a backlight module capable of reducing light leakage without the problem that the light shielding film falls off. Further, the present invention relates to a liquid crystal display device using such a backlight module.
- a backlight module comprising a backlight, the backlight comprising a plate body mounted with a light source lamp, and a reflector disposed at at least one longitudinal edge of the plate body, reflective The inner side wall of the panel forms a reflective surface that is disposed obliquely away from the light source lamp.
- the reflector can prevent the scattered light from being emitted from the backlight module and the light leakage occurs.
- the backlight module also eliminates the light shielding film, so that there is no problem that the light shielding film falls off.
- the reflector can also reflect the scattered light into the light guide plate to improve the light efficiency.
- the inner side wall of the reflector is arranged to be inclined away from the light source lamp.
- the angle of the reflector relative to the normal to the panel is between 25 and 35, preferably 30.
- the length of the horizontal component of the reflector is equal to the sum of the thickness of the source lamp and the coupling distance.
- the term "length of the horizontal component of the reflector” means the length of the component of the reflector perpendicular to the surface of the panel.
- the light-reflecting surface is coated on the light-reflecting surface.
- the reflective layer is used to further increase the reflection efficiency of the scattered light, thereby improving the light efficiency.
- the reflector is integrally formed with the plate. This means that the reflector and the board are integrated, which fundamentally avoids the problem of the reflector falling off, and avoids the problem of the dark area of the backlight module due to the falling off of the reflector.
- the reflector and the plate are made of aluminum.
- the thermal conductivity of aluminum is better to improve the heat dissipation performance of the backlight module.
- the light source lamp is a light emitting diode, and the light emitting diode is completely housed in a space formed by the reflector and the plate body. This design ensures that the LEDs are in the best reflective position.
- a liquid crystal display device including the backlight module according to the above is proposed.
- Such a liquid crystal display device can reduce current while ensuring brightness, thereby achieving energy saving.
- the backlight of the backlight module comprises a plate body on which the light source lamp is mounted, and a reflector plate installed at the longitudinal edge of the plate body.
- the reflector is capable of reflecting scattered light into the light guide plate to avoid light leakage.
- the reflector can also reflect part of the scattered light into the light guide plate to improve the utilization of light.
- the inner side wall of the reflector forms a reflecting surface, and the reflecting surface is inclined away from the light source lamp.
- the angle of the reflector relative to the normal to the plate is between 25 and 35, preferably 30.
- the length of the horizontal component of the reflector is equal to the sum of the thickness of the light source and the coupling distance.
- the liquid crystal display device using the backlight module can also reduce the current while ensuring the brightness. To achieve the purpose of energy saving.
- FIG. 1 is a schematic structural view of a backlight module according to the present invention.
- FIG. 2 is a three-dimensional structural view of a backlight according to the present invention.
- Fig. 3 is a view taken along the line A in Fig. 2;
- Fig. 1 schematically shows the structure of a backlight module 10 in accordance with the present invention.
- the backlight module 10 includes a backlight 40 and a light guide plate 27 disposed directly in front of the backlight 40.
- the backlight 40 includes a board body 21 on which the light source lamps 23 are mounted, and a reflector 24 disposed at one longitudinal edge of the board body 21.
- the light reflecting plate 24 can avoid a light leakage phenomenon which occurs when scattered light is emitted from a gap between the plate body 21 and the light guiding plate 27.
- the reflector 24 can also reflect most of the scattered light into the light guide plate 27 (as indicated by the dotted arrow in FIG. 1), which greatly improves the light efficiency, and the liquid crystal display device using the backlight module 10 is also While maintaining brightness, power consumption is reduced and energy is saved.
- Figure 2 shows the structure of the backlight 40 in a three-dimensional view.
- the light source lamp 23 is mounted in a space formed by the plate body 21 and the light-reflecting plate 24.
- the inner surface of the reflector 24 forms a reflective surface (e.g., indicia 26 in Fig. 3).
- a reflective layer is also coated on the reflective surface 26.
- Both the plate body 21 and the reflector 24 can be made of a material having better thermal conductivity to improve heat dissipation performance.
- the plate body 21 and the light reflecting plate 24 are selected to be aluminum materials, and the aluminum not only has better thermal conductivity but also lower price to reduce production cost.
- the reflector 24 and the plate 21 are integrally formed. This structure fundamentally avoids the possibility that the reflector 24 is detached, and the backlight module 10 caused by the detachment of the reflector 24 is avoided. Dark spot problem.
- the inner side wall of the reflector 24 is also disposed to be obliquely away from the light source lamp 23.
- the reflector 24 is constructed in a parallelepiped shape having a parallelogram in cross section. Viewed from the cross section of the reflector 24 (Fig. 3), the side 26 of the parallelogram is the reflective surface of the reflector 24, which is disposed obliquely away from the light source lamp 23 at an angle a with respect to the normal to the panel 21. in a In the embodiment, the angle ⁇ is between 25° and 35°, preferably 30°.
- the length of the component of the edge 26 on the broken line 25 is equal to the sum of the thickness of the light source lamp 23 and the coupling distance, which means that the length of the horizontal component of the reflector 24 on the broken line 25 is equal to the thickness of the light source lamp 23 and the coupling distance.
- the oblique arrangement of the reflector 24 and the size of the reflector 24 not only ensure that the reflector 24 will completely reflect the scattered light into the light guide plate 27, but also does not affect the display effect of the display using the backlight module 10.
- the cross section of the light reflecting plate 24 is shown as a parallelogram in FIG. 3, the cross section of the reflecting plate 24 may not be limited thereto, and may be any suitable shape, but the shape and size of the side 26 should be ensured. .
- the light source lamp 23 can be selected as a light emitting diode, and for example, can be selected as the square type light emitting diode in FIG.
- the square-shaped LED is more convenient to install and convenient for production.
- the present invention also relates to a liquid crystal display device using such a backlight module 10, such as a liquid crystal display. Since the light reflecting plate 24 can completely introduce the light from the light source lamp 23 into the light guiding plate 27, the power consumption can be reduced and the size of the light source lamp 23 can be reduced while ensuring the brightness of the liquid crystal display device, thereby achieving energy saving and reducing Cost of production.
- the inventors conducted experiments using the backlight module 10, wherein the thickness of the light-emitting diode 23 was selected to be 0.8 mm and the coupling distance was 0.4 mm; the thickness of the reflector 24 was 0.8 mm, and the length of the component in the horizontal direction was 1.38. Mm, angle ⁇ is 30°. The brightness of the liquid crystal display device using such a backlight module 10 was increased by 3%.
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- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Nonlinear Science (AREA)
- Planar Illumination Modules (AREA)
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- Crystallography & Structural Chemistry (AREA)
Abstract
公开了一种背光模组（10）和使用其的液晶显示装置。背光模组（10）包括：背光源（40），背光源（40）含有安装有光源灯（23）的板体（21），和设置在板体（21）的至少一个纵向边缘处的反光板（24）；反光板（24）的内侧壁形成反光面，反光面设置为倾斜地远离光源灯（23）。背光模组（10）能够使光源灯（23）发出的光尽量进入导光板（27）中，避免了漏光和光效率低下的问题，也因此能够在保证亮度的同时，降低电流，达到节能的目的。
Description
相关申请的交叉引用
本申请要求享有于2014年9月17日提交的名称为“背光模组和使用其的液晶显示装置”的中国专利申请CN201410473106.3的优先权，该申请的全部内容通过引用并入本文中。
本发明涉及一种液晶显示部件，特别是一种背光模组。本发明还涉及使用这种背光模组的液晶显示装置。
薄膜晶体管应显示器(即，TFT-LCD)是当前平板显示器的主要类型之一，其在电子设备中得到了广泛的应用。由于液晶本身不发光，为了显示必须要配置背光模组。目前的主流的背光模组为侧入式背光源，即将背光源灯设置于背光侧面，利用导光板将光传导至显示区范围。但是，这种背光模组会出现漏光，为了解决这种漏光问题，现有技术的解决方法是在光源灯的上方贴附遮光膜。这种遮光膜存在脱落风险，而且脱落后会造成背光模组存在暗区等问题，影响产品的品质。
发明内容
针对现有技术中所存在的上述技术问题，本发明提出了一种背光模组，这种背光模组能够使减轻漏光，而且不会存在遮光膜脱落的问题。此外，本发明还涉及使用这种背光模组的液晶显示装置。
1)根据本发明的第一方面，提出了一种背光模组，包括背光源，该背光源含有安装有光源灯的板体，和设置在板体的至少一个纵向边缘处的反光板，反光板的内侧壁形成反光面，所述反光面设置为倾斜地远离光源灯。
根据本发明的背光模组，反光板能够避免散射光射出背光模组而出现漏光现
象，从而减轻了背光模组漏光的问题。这种背光模组也省去了遮光膜，从而也不存在遮光膜脱落的问题。此外，反光板还能够将散射光反射到导光板中，提高光效。
2)在根据本发明的第1)项的一个实施方案中，反光板的内侧壁设置为倾斜远离光源灯。在反光板的横截面中，反光板相对于板体的法线的夹角在25°-35°之间，优选为30°。而且，反光板的水平分量的长度等于光源灯的厚度与耦光距离之和。在本申请中，用语“反光板的水平分量的长度”是指反光板在垂直于板体表面上的分量的长度。这些技术特不但保证了背光模组不会发生漏光，而且不会影响使用这种背光模组的显示器的显示效果。
3)在根据本发明的第1)项或第2)项的一个实施方案中，在反光面上涂覆有反光层。反光层用于进一步提高散射光的反射效率，从而提高光效。
4)在根据本发明的第1)项到第3)项中任一项的一个实施方案中，反光板与板体为一体成型。这意味着，反光板和板体为一个整体，从根本上避免了反光板脱落的问题，也就避免了由于反光板脱落而引起背光模组暗区的问题。
5)在根据本发明的第1)项到第4)项中任一项的一个实施方案中，反光板和板体为铝材。铝的导热性能较好，以提高背光模组的散热性能。
6)在根据本发明的第1)项到第5)项中任一项的一个实施方案中，光源灯为发光二极管，并且发光二极管完全容纳在反光板与板体形成的空间内。这种设计能够保证发光二极管处于最佳反射位置中。
7)根据本发明的第二方面，提出一种包括根据上文所述的背光模组的液晶显示装置。这种液晶显示装置在保证亮度的同时，能够降低电流，达到节能的目的。
与现有技术相比，本发明的优点在于，背光模组的背光源包括安装有光源灯的板体，和安装在板体的纵向边缘处的反光板。反光板能够将散射光反射到导光板中，避免了漏光。反光板还能将部分散射光反射到导光板中，提高光的利用率。反光板的内侧壁形成反光面，并且反光面倾斜地远离光源灯。反光板相对于板体的法线的夹角在25°-35°之间，优选为30°。反光板的水平分量的长度等于光源灯的厚度与耦光距离之和。这些技术特不但保证了背光模组会将散射光完全反射到导光板中而不会发生漏光，而且不会影响使用这种背光模组的显示器的显示效果。使用这种背光模组的液晶显示装置也因此能够在保证亮度的同时，降低电流，
达到节能的目的。
在下文中将基于实施例并参考附图来对本发明进行更详细的描述。其中：
图1是根据本发明的背光模组的结构示意图；
图2是根据本发明的背光源的三维结构图；
图3是图2的A向视图。
在附图中，相同的部件使用相同的附图标记。附图并未按照实际的比例绘制。
下面将结合附图对本发明做进一步说明。
图1示意性地显示了根据本发明的背光模组10的结构。背光模组10包括背光源40和设置在背光源40正前方的导光板27。背光源40包括安装有光源灯23的板体21，和设置在板体21的一个纵向边缘处的反光板24。反光板24能够避免散射光从板体21和导光板27之间的间隙射出而出现的漏光现象。此外，反光板24还能够将大部分的散射光反射到导光板27中(如图1中的虚线箭头所示)，这会大大提高光效率，使用背光模组10的液晶显示装置也会因此而在保持亮度的同时，减小电能消耗、实现节能。
图2以三维视图的方式显示了背光源40的结构。在背光源40的板体21的一个纵向边缘处的反光板24，光源灯23则安装在板体21和反光板24形成的空间内。反光板24的内表面形成反光面(如图3中的标记26)。为了提高光反射率，还在反光面26上涂覆有反光层。板体21、反光板24均可选用导热性较好的材料以提高散热性能。在一个实施例中，板体21、反光板24选择为为铝材，铝不但具有较好的导热性能，价格也较低，以降低生产成本。在另一个实施例中，反光板24和板体21为一体成型，这种结构从根本上避免了反光板24脱落的可能性，也就避免了因反光板24脱落而造成的背光模组10暗斑的问题。
为了进一步提高反光效率，还将反光板24的内侧壁设置为倾斜地远离光源灯23。如图2和3所示，反光板24构造为平行六面体形，其横截面为平行四边形。从反光板24的横截面来看(如图3)，平行四边形的边26是反光板24的反光面，其设置为以相对于板体21的法线的角度α倾斜地远离光源灯23。在一个
实施例中，角度α在25°-35°之间，优选为30°。另外，边26在虚线25上的分量的长度等于光源灯23的厚度与耦光距离之和，这意味着反光板24在虚线25上的水平分量的长度等于光源灯23的厚度与耦光距离之和。这样，反光板24的倾斜设置方式和反光板24的尺寸不但保证了反光板24会将散射光完全反射到导光板27中，而且不会影响使用背光模组10的显示器的显示效果。应注意地是，虽然在图3中显示了反光板24的横截面为平行四边形，但是反光板24的横截面可不限于此，其可为任何适当的形状，但是应保证边26的形状和尺寸。
光源灯23可选择为发光二极管，例如可选择为图2中的正方体型的发光二极管。正方体形发光二极管安装更为方便，方便了生产。
本发明还涉及使用这种背光模组10的液晶显示装置，例如液晶显示屏。由于反光板24能够将来自光源灯23的光完全导入导光板27，从而能够在保证液晶显示装置的亮度的同时，能降低电能消耗和降低光源灯23的大小，因此能够实现节能的目的并降低生产成本。
发明人使用这种背光模组10进行试验，其中发光二极管23的厚度选择为0.8mm，耦光距离为0.4mm；反光板24的厚度取0.8mm，其在水平方向上的分量的长度为1.38mm，角度α为30°。使用这种背光模组10的液晶显示装置的亮度提高了3％。
虽然已经参考优选实施例对本发明进行了描述，但在不脱离本发明的范围的情况下，可以对其进行各种改进并且可以用等效物替换其中的部件。尤其是，只要不存在结构冲突，各个实施例中所提到的各项技术特征均可以任意方式组合起来。本发明并不局限于文中公开的特定实施例，而是包括落入权利要求的范围内的所有技术方案。
Claims (11)
- 一种背光模组，包括背光源，所述背光源含有安装有光源灯的板体，和设置在所述板体的至少一个纵向边缘处的反光板，所述反光板的内侧壁形成反光面，所述反光面设置为倾斜地远离所述光源灯。
- 根据权利要求1所述的背光模组，其中，在所述反光板的横截面中，所述反光板相对于所述板体的法线的夹角在25°-35°之间。
- 根据权利要求2所述的背光模组，其中，所述反光板相对于所述板体的法线的夹角为30°。
- 根据权利要求2所述的背光模组，其中，所述反光板的水平分量的长度等于所述光源灯的厚度与耦光距离之和。
- 根据权利要求4所述的背光模组，其中，所述反光板与所述板体为一体成型。
- 根据权利要求5所述的背光模组，其中，在所述反光面上涂覆有反光层。
- 根据权利要求6所述的背光模组，其中，所述反光板和所述板体为铝材。
- 根据权利要求7所述的背光模组，其中，所述光源灯为发光二极管，并且所述发光二极管完全容纳在所述反光板与所述板体形成的空间内。
- 一种液晶显示装置，其包括背光模组，所述背光模组包括背光源，所述背光源含有安装有光源灯的板体，和设置在所述板体的至少一个纵向边缘处的反光板，所述反光板的内侧壁形成反光面，所述反光面设置为倾斜地远离所述光源灯。
- 根据权利要求9所述的液晶显示装置，其中，在所述反光板的横截面中，所述反光板相对于所述板体的法线的夹角在25°-35°之间。
- 根据权利要求10所述的液晶显示装置，其中，所述反光板的水平分量的长度等于所述光源灯的厚度与耦光距离之和。
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| US14/416,773 US20170184773A1 (en) | 2014-09-17 | 2014-12-25 | Backlight module and liquid crystal display device using the same |
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| CN201410473106.3A CN104296002A (zh) | 2014-09-17 | 2014-09-17 | 背光模组和使用其的液晶显示装置 |
| CN201410473106.3 | 2014-09-17 |
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| CN109782489B (zh) * | 2019-03-28 | 2021-10-22 | 京东方科技集团股份有限公司 | 一种背光模组及显示装置 |
| US20220214489A1 (en) * | 2019-04-29 | 2022-07-07 | Signify Holding B.V. | A light emitting device |
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- 2014-09-17 CN CN201410473106.3A patent/CN104296002A/zh active Pending
- 2014-12-25 WO PCT/CN2014/094977 patent/WO2016041286A1/zh not_active Ceased
- 2014-12-25 US US14/416,773 patent/US20170184773A1/en not_active Abandoned
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| US20170184773A1 (en) | 2017-06-29 |
| CN104296002A (zh) | 2015-01-21 |
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