CN108073000A - Backlight module and liquid crystal display - Google Patents
Backlight module and liquid crystal display Download PDFInfo
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- CN108073000A CN108073000A CN201711463436.4A CN201711463436A CN108073000A CN 108073000 A CN108073000 A CN 108073000A CN 201711463436 A CN201711463436 A CN 201711463436A CN 108073000 A CN108073000 A CN 108073000A
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 22
- 238000009792 diffusion process Methods 0.000 claims abstract description 19
- 230000004308 accommodation Effects 0.000 claims abstract 3
- 238000000034 method Methods 0.000 description 3
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910000484 niobium oxide Inorganic materials 0.000 description 1
- URLJKFSTXLNXLG-UHFFFAOYSA-N niobium(5+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Nb+5].[Nb+5] URLJKFSTXLNXLG-UHFFFAOYSA-N 0.000 description 1
- BPUBBGLMJRNUCC-UHFFFAOYSA-N oxygen(2-);tantalum(5+) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ta+5].[Ta+5] BPUBBGLMJRNUCC-UHFFFAOYSA-N 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 238000005488 sandblasting Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- PBCFLUZVCVVTBY-UHFFFAOYSA-N tantalum pentoxide Inorganic materials O=[Ta](=O)O[Ta](=O)=O PBCFLUZVCVVTBY-UHFFFAOYSA-N 0.000 description 1
Classifications
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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
-
- 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
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
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- 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)
Abstract
本发明提供一种背光模组和液晶显示器，其中背光模组包括光源、扩散板和反射板；所述反射板贴合在所述扩散板的入光面侧；所述反射板包括面向所述扩散板入光面侧的内凹曲面；所述内凹曲面为漫反射面；所述内凹曲面和所述扩散板的入光面之间形成容纳腔；所述光源设置在所述容纳腔内并贴合在所述扩散板的入射光面；所述光源发出的光线投射向所述内凹曲面。采用本实施例提供的背光模组，直接将光源设置在扩散板的背面，利用漫反射层反射光线，实现入射到扩散板光线的均匀性。相比于现有技术的背光模组，无需设置导光板，减小了背光模组的厚度和层结构数量。
The present invention provides a backlight module and a liquid crystal display, wherein the backlight module includes a light source, a diffusion plate and a reflection plate; the reflection plate is attached to the light incident surface side of the diffusion plate; The concave curved surface on the light incident surface side of the diffusion plate; the concave curved surface is a diffuse reflection surface; an accommodation cavity is formed between the concave curved surface and the light incident surface of the diffusion plate; the light source is arranged in the accommodation cavity inside and attached to the incident light surface of the diffusion plate; the light emitted by the light source is projected to the concave curved surface. With the backlight module provided in this embodiment, the light source is directly arranged on the back of the diffuser plate, and the light is reflected by the diffuse reflection layer to achieve the uniformity of the light incident on the diffuser plate. Compared with the backlight module in the prior art, there is no need to arrange a light guide plate, which reduces the thickness and the number of layer structures of the backlight module.
Description
技术领域technical field
本发明涉及液晶显示技术领域，具体涉及一种背光模组以及采用前述背光模组的液晶显示器。The invention relates to the technical field of liquid crystal display, in particular to a backlight module and a liquid crystal display using the aforementioned backlight module.
背景技术Background technique
液晶显示器利用液晶状态的变化控制从背光模组侧入射的光通量，实现显示内容的变化。实际应用中，背光模组各处光强度的一致性影响液晶显示器的质量，特别是影响液晶显示器各处均点亮时同一颜色的颜色一致性，因此对背光模组出射光一直性的改进一直是液晶显示器质量改进的重要方向。The liquid crystal display uses the change of the state of the liquid crystal to control the luminous flux incident from the side of the backlight module to realize the change of the displayed content. In practical applications, the consistency of light intensity at various places in the backlight module affects the quality of the liquid crystal display, especially the color consistency of the same color when all parts of the liquid crystal display are lit. It is an important direction for improving the quality of liquid crystal displays.
基于背光模组出射光一致性的考虑，目前大部分厂商使用的背光模组均为侧光型背光模组。此类背光模组包括光源、导光板、反射板、扩散板和棱镜片；光源设置在导光板的周侧，反射板设置在导光板远离液晶面板的一侧，扩散板和棱镜片设置在导光板靠近导光板的一侧。前述侧光型背光模组虽然能够较好地保证入射至液晶面板的光线一致性，但是因为需要设置尺寸较厚的导光板，所以无法有效地减小背光模组的厚度，使得组装后的液晶显示器尺寸较厚、无法应用在智能手机等对厚度有严格要求的设备中。Based on the consideration of the consistency of the emitted light from the backlight module, the backlight modules currently used by most manufacturers are edge-light backlight modules. This type of backlight module includes a light source, a light guide plate, a reflection plate, a diffusion plate and a prism sheet; the light source is arranged on the peripheral side of the light guide plate, the reflection plate is arranged on the side of the light guide plate away from the liquid crystal panel, and the diffusion plate and the prism sheet are arranged on the side of the light guide plate. The side of the light plate close to the light guide plate. Although the above-mentioned side-light type backlight module can better ensure the consistency of light incident on the liquid crystal panel, it cannot effectively reduce the thickness of the backlight module because of the need to install a thicker light guide plate, so that the assembled liquid crystal The display size is thick and cannot be used in devices that have strict requirements on thickness such as smartphones.
发明内容Contents of the invention
为解决现有的背光模组厚度不能进一步减小的问题，本发明提供一种新的背光模组和采用前述背光模组的液晶显示器。In order to solve the problem that the thickness of the existing backlight module cannot be further reduced, the present invention provides a new backlight module and a liquid crystal display using the aforementioned backlight module.
本发明提供一种背光模组，包括光源、扩散板和反射板；The invention provides a backlight module, including a light source, a diffusion plate and a reflection plate;
所述反射板贴合在所述扩散板的入射光面；The reflecting plate is attached to the light-incident surface of the diffusing plate;
所述反射板包括面向所述扩散板入射光面侧的内凹曲面；所述内凹曲面为漫反射面；The reflective plate includes a concave curved surface facing the incident light side of the diffuser; the concave curved surface is a diffuse reflection surface;
所述内凹曲面和所述扩散板的入光面之间形成容纳腔；An accommodating cavity is formed between the concave curved surface and the light incident surface of the diffusion plate;
所述光源设置在所述容纳腔内并贴合在所述扩散板的入射光面；所述光源发出的光线投射向所述内凹曲面。The light source is arranged in the accommodating cavity and adhered to the incident light surface of the diffusion plate; the light emitted by the light source is projected toward the concave curved surface.
可选的，所述内凹曲面为非球面。Optionally, the concave curved surface is aspherical.
可选的，所述内凹曲面上蒸镀有形成所述漫反射面的漫反射层。Optionally, a diffuse reflection layer forming the diffuse reflection surface is evaporated on the concave curved surface.
可选的，还包括设置在所述扩散板的出射光面侧的棱镜片。Optionally, a prism sheet disposed on the light-emitting surface side of the diffusion plate is also included.
可选的，所述光源为点光源；Optionally, the light source is a point light source;
在所述反射板上设置有按照阵列排布的多个所述内凹曲面和分别与各个所述内凹曲面对应的点光源；A plurality of said concave curved surfaces arranged in an array and a point light source respectively corresponding to each said concave curved surface are arranged on said reflecting plate;
相邻的所述内凹曲面边缘连接，并与所述扩散板的入射光面之间具有间隙。Adjacent edges of the concave curved surfaces are connected, and there is a gap between them and the light-incident surface of the diffusion plate.
可选的，所述光源为线光源；Optionally, the light source is a line light source;
所述内凹面为母线平行于所述线光源的柱状曲面。The inner concave surface is a columnar curved surface whose generatrix is parallel to the line light source.
本发明还提供一种液晶显示器，包括液晶面板和如前所述的背光模组；所述背光模组贴合所述液晶面板设置。The present invention also provides a liquid crystal display, comprising a liquid crystal panel and the above-mentioned backlight module; the backlight module is attached to the liquid crystal panel.
采用本实施例提供的背光模组，直接将光源设置在扩散板的背面，利用漫反射层反射光线，实现入射到扩散板光线的均匀性。相比于现有技术的背光模组，无需设置导光板，减小了背光模组的厚度和层结构数量。With the backlight module provided in this embodiment, the light source is directly arranged on the back of the diffuser plate, and the light is reflected by the diffuse reflection layer to achieve the uniformity of the light incident on the diffuser plate. Compared with the backlight module in the prior art, there is no need to arrange a light guide plate, which reduces the thickness and the number of layer structures of the backlight module.
附图说明Description of drawings
通过参考以下结合附图的说明及权利要求书的内容，并且随着对本发明的更全面理解，本发明的其它目的及结果将更加明白及易于理解。在附图中：By referring to the following description combined with the accompanying drawings and the contents of the claims, and with a more comprehensive understanding of the present invention, other objectives and results of the present invention will be more clear and easy to understand. In the attached picture:
图1是实施例提供的背光模组截面示意图；Fig. 1 is a schematic cross-sectional view of a backlight module provided by an embodiment;
其中：11-光源，12-扩散板，13-反射板，14-漫反射层。Among them: 11-light source, 12-diffusing plate, 13-reflecting plate, 14-diffuse reflection layer.
在所有附图中相同的标号指示相似或相应的特征或功能。The same reference numerals indicate similar or corresponding features or functions throughout the drawings.
具体实施方式Detailed ways
以下将结合附图对本发明的具体实施例进行详细描述。Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.
图1是实施例提供的背光模组截面示意图。如图1所示，本实施例通过的背光模组包括光源11、扩散板12、反射板13和漫反射层14。FIG. 1 is a schematic cross-sectional view of a backlight module provided in an embodiment. As shown in FIG. 1 , the backlight module used in this embodiment includes a light source 11 , a diffusion plate 12 , a reflection plate 13 and a diffuse reflection layer 14 .
其中扩散板12和反射板13层叠二者贴合地设置；反射板13面向扩散板12入射光面侧设置有内凹曲面，内凹曲面的表面为漫反射面。在内凹曲面和扩散板12的入光面之间形成一容纳腔；光源11设置在容纳腔内并贴合在扩散板12的入光面上；光源11发出的光线投射向内凹曲面，并通过内凹曲面漫反射后再反射到扩散板12的入射光面侧。The diffuser plate 12 and the reflector plate 13 are laminated and arranged in close contact; the reflector plate 13 is provided with a concave curved surface facing the light-incident surface of the diffuser plate 12, and the surface of the concave curved surface is a diffuse reflection surface. An accommodating cavity is formed between the concave curved surface and the light-incident surface of the diffuser plate 12; the light source 11 is arranged in the accommodating cavity and attached to the light-incident surface of the diffuser plate 12; the light emitted by the light source 11 is projected toward the concave curved surface, It is diffusely reflected by the concave curved surface and then reflected to the incident light side of the diffuser plate 12 .
如此，从光源11发出的光线被漫发射面漫反射后形成了较为均匀的光线，光线被漫反射面反射后照射在扩散板12的入射光面，并由入射光面侧照射到扩散板12内。此时，照射到光源11周侧的光线经过扩散的光线后被折射后，可以从反射板13中贴合光源11处对应的出射光面侧射出，保证扩散板12的出射光面侧能够达到和周围区域差不多的光强度。In this way, the light emitted from the light source 11 is diffusely reflected by the diffuse reflection surface to form a relatively uniform light, and the light is reflected by the diffuse reflection surface and irradiates the incident light surface of the diffuser plate 12, and irradiates the diffuser plate 12 from the incident light surface side Inside. At this time, the light irradiated to the side of the light source 11 is refracted after passing through the diffused light, and can be emitted from the side of the light emitting surface corresponding to the place where the light source 11 is attached in the reflector 13, so as to ensure that the light emitting surface side of the diffuser plate 12 can reach Similar light intensity to the surrounding area.
本实施例中，漫反射层14采用蒸镀工艺或者溅镀工艺设置在内凹面的漫发射膜层，漫反射层14可以采用银、镁、铂金、氧化铌或者五氧化二钽等具有良好反射特性的材料制成。当然，在其他实施例中，漫反射层14也可以采用磨砂或者喷砂工艺磨蚀内凹面形成。In this embodiment, the diffuse reflection layer 14 adopts the evaporation process or the sputtering process to set the diffuse emission film layer on the inner concave surface, and the diffuse reflection layer 14 can be made of silver, magnesium, platinum, niobium oxide or tantalum pentoxide, etc. Made of characteristic materials. Certainly, in other embodiments, the diffuse reflective layer 14 may also be formed by grinding the inner concave surface by grinding or sandblasting.
采用本实施例提供的背光模组，直接将光源11设置在扩散板12的背面，利用漫反射层14反射光线，实现入射到扩散板12光线的均匀性。相比于现有技术的背光模组，无需设置导光板，减小了背光模组的厚度和层结构数量。With the backlight module provided in this embodiment, the light source 11 is directly arranged on the back of the diffuser plate 12 , and the light is reflected by the diffuse reflection layer 14 to achieve the uniformity of the light incident on the diffuser plate 12 . Compared with the backlight module in the prior art, there is no need to arrange a light guide plate, which reduces the thickness and the number of layer structures of the backlight module.
进一步的，本实施例中的内凹面优选为非球面，使得反射面的尺寸进可能的增大。Further, the inner concave surface in this embodiment is preferably an aspheric surface, so that the size of the reflective surface can be further increased.
本实施例中的光源11优选采用线光源11；与线光源11对应的，前述内凹曲面优选设置成母线平行于线光源11的柱状曲面。The light source 11 in this embodiment is preferably a linear light source 11; corresponding to the linear light source 11, the aforementioned concave curved surface is preferably set so that the generatrix is parallel to the columnar curved surface of the linear light source 11.
在其他实施例中，光源11也可以是点光源11。在光源11为点光源11的情况下，为尽可能的增加背光模组的面积，反射板13上可以设置多个阵列排布的内凹曲面，并且在各个内凹曲面内均设置点光源11。相邻的内凹曲面边缘直接连接，并且与扩散板12的入射光面之间具有间隙。In other embodiments, the light source 11 may also be a point light source 11 . In the case that the light source 11 is a point light source 11, in order to increase the area of the backlight module as much as possible, a plurality of concave curved surfaces arranged in an array can be arranged on the reflecting plate 13, and a point light source 11 is arranged on each concave curved surface . Adjacent edges of the concave curved surfaces are directly connected, and there is a gap between them and the incident light surface of the diffusion plate 12 .
除了就有前述结构外，本实施例提供的背光模组还包括设置在扩散板12的出光面侧的棱镜片。In addition to the aforementioned structure, the backlight module provided in this embodiment further includes a prism sheet disposed on the light-emitting surface side of the diffuser plate 12 .
除了提供前述的背光模组外，本发明实施例还提供一种采用前述背光模组的液晶显示器。液晶显示器还包括与前述背光模组贴合的液晶面板。In addition to providing the aforementioned backlight module, an embodiment of the present invention also provides a liquid crystal display using the aforementioned backlight module. The liquid crystal display also includes a liquid crystal panel attached to the aforementioned backlight module.
以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应所述以权利要求的保护范围为准。The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. Should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.
Claims (7)
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110244492A (en) * | 2019-06-18 | 2019-09-17 | 京东方科技集团股份有限公司 | Translucent display substrate and transparent display |
| CN110967871A (en) * | 2019-12-18 | 2020-04-07 | 京东方科技集团股份有限公司 | Backlight module and display device |
| CN114035379A (en) * | 2021-11-30 | 2022-02-11 | 康佳集团股份有限公司 | Backlight module, display and television |
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| US11537004B2 (en) | 2019-06-18 | 2022-12-27 | Boe Technology Group Co., Ltd. | Transparent display substrate and transparent display device |
| CN110967871A (en) * | 2019-12-18 | 2020-04-07 | 京东方科技集团股份有限公司 | Backlight module and display device |
| CN110967871B (en) * | 2019-12-18 | 2023-08-08 | 京东方科技集团股份有限公司 | Backlight module and display device |
| CN114035379A (en) * | 2021-11-30 | 2022-02-11 | 康佳集团股份有限公司 | Backlight module, display and television |
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Application publication date: 20180525 |