WO2014012277A1 - 背光模块及显示装置 - Google Patents
背光模块及显示装置 Download PDFInfo
- Publication number
- WO2014012277A1 WO2014012277A1 PCT/CN2012/079417 CN2012079417W WO2014012277A1 WO 2014012277 A1 WO2014012277 A1 WO 2014012277A1 CN 2012079417 W CN2012079417 W CN 2012079417W WO 2014012277 A1 WO2014012277 A1 WO 2014012277A1
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- WO
- WIPO (PCT)
- Prior art keywords
- length
- backlight module
- light
- substrate
- light sources
- Prior art date
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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
- G02F1/133611—Direct backlight including means for improving the brightness uniformity
-
- 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
- G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/002—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces
- G02B6/0021—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces for housing at least a part of the light source, e.g. by forming holes or recesses
-
- 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
- G02B6/0066—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 characterised by the light source being coupled to the light guide
- G02B6/0068—Arrangements of plural sources, e.g. multi-colour light sources
-
- 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
Definitions
- the present invention relates to a liquid crystal display technology, and in particular to a backlight module and a display device therefor.
- Liquid crystal display (Liquid Crystal Display, LCD) has been widely used in a variety of electronic products, most of the liquid crystal display is a backlight type liquid crystal display, which is composed of a liquid crystal display panel and a backlight module (backlight Module).
- the backlight module can be divided into a side-light type and a direct-light type according to the incident position of the light source (Direct-light) Type) Two to provide a backlight to the LCD panel.
- Direct-light Direct-light
- a direct-lit backlight module as an example, which can use multiple lamps or light bars (light Bars are used as a light source to provide a backlight to the liquid crystal display panel.
- the back frame of the backlight module needs to reserve space for installing the light source, which is disadvantageous for the narrow frame (Slim Bezel) design.
- the direct-lit light-incident backlight module since a large number of light sources are required to form the surface light source, the cost and energy consumption of the light source are increased.
- the invention provides a backlight module and a display device to solve the problem of forming a surface light source of the backlight module.
- a main object of the present invention is to provide a backlight module, including:
- the light guide sheet includes a plurality of arcuate recesses, and the light source is received in the arcuate recess, and the long axis direction of the arcuate recess It is parallel to the long axis direction of the substrate.
- Another object of the present invention is to provide a backlight module, including:
- the light guide sheet includes a plurality of arcuate recesses, the light source is received in the arcuate recess, and each of the arcuate recesses has a a length and a second length, wherein the first length is greater than the second length, the first length being parallel to a long axis direction of the substrate.
- the backlight module includes:
- the light guide sheet includes a plurality of arcuate recesses, and the light source is received in the arcuate recess, and the long axis direction of the arcuate recess It is parallel to the long axis direction of the substrate.
- each of the circular arc-shaped recesses has a first length and a second length, wherein the first length is greater than the second length, and the first length is parallel to the The long axis direction of the arcuate recess.
- the first length is between 1 mm and 5 cm.
- the second length is between 1 mm and 3 cm.
- the ratio of the first length to the second length is the same as the aspect ratio of the substrate.
- the ratio of the first length to the second length is 4:3 or 16:9.
- a first spacing between each of the two adjacent light sources on the first length is greater than a second spacing between each adjacent one of the light sources on the second length spacing.
- one of the light sources is housed in each of the arcuate recesses.
- a plurality of the light sources are accommodated in each of the arcuate recesses.
- the backlight module and the display device of the present invention can uniformly light the light source through the light guide sheet to form a uniform planar light source. Moreover, the arc-shaped concave portion of the light guide sheet can laterally diffuse the light of the light source according to the aspect ratio or size of the display device, thereby reducing the number of light sources and reducing the cost and energy consumption of the backlight module.
- FIG. 1 is a partial cross-sectional view showing a backlight module and a display panel of a first embodiment of the present invention
- FIGS. 2A and 2B are schematic views showing a light guide sheet and a light source according to an embodiment of the invention.
- 3A and 3B are cross-sectional views showing a circular arc-shaped recess according to an embodiment of the present invention.
- FIG. 4 is a partial cross-sectional view showing a light guide sheet according to another embodiment of the present invention.
- Figure 5 shows a partial cross-sectional view of a light guide sheet in accordance with yet another embodiment of the present invention.
- the word “comprising” is to be understood to include the component, but does not exclude any other component.
- “on” means located above or below the target component, and does not mean that it must be on the top based on the direction of gravity.
- FIG. 1 shows a partial cross-sectional view of a backlight module and a display panel according to an embodiment of the invention.
- the backlight module 100 of the present embodiment can be disposed relative to a display panel 101.
- the display panel 101 can be a liquid crystal display panel to form a display device such as a liquid crystal display device.
- the backlight module 100 can include a back plate 110 , a plurality of light sources 120 , a substrate 130 , a reflective layer 140 , and a light guide sheet 150 .
- the back plate 110 of the present embodiment is made of an opaque material, such as a plasticized material, a metal material, or a combination thereof, for carrying the light source 120 , the substrate 130 , and the light guide sheet 150 .
- the light source 120 is disposed on the substrate 130 for providing light to the display panel 101.
- the light source 120 can be a point source (point Light source), such as Light-Emitting Diode (LED), Organic Light Emitting Diode, OLED) or Electro-Luminescence (EL) components.
- the light source 120 can be a plurality of light emitting diode chips arranged on the substrate 130 and having a predetermined interval between each two adjacent light sources 120.
- the substrate 130 is a rectangular plate body.
- the substrate 130 can be a circuit board, such as a printed substrate (Printed Circuit board, PCB) or flexible printed substrate (Flexible Printed Circuits (FPC) are disposed on the backplane 110 and electrically connected to the light source 120 for controlling the illumination of the light source 120.
- PCB printed substrate
- FPC Flexible Printed Circuits
- the reflective layer 140 of the present embodiment may be disposed on a surface of the substrate 130 and formed between the light sources 120 .
- the reflective layer 140 can be a reflective plate, a reflective sheet or a reflective coating for reflecting the light of the light source 120.
- the reflective layer 140 is made of a high reflectivity material such as silver, aluminum, gold, chromium, copper, indium, antimony, nickel, platinum, rhodium, iridium, tin, antimony, tungsten, manganese, any combination thereof. Alloy or white reflective paint resistant to yellowing and heat.
- the light guide sheet 150 of the embodiment can utilize injection molding (Injection Molding), stamping, cutting, precision casting, casting, machining, die casting or forging.
- the material of the light guiding sheet 150 is, for example, glass, photocurable resin, polymethyl methacrylate (PMMA) or polycarbonate (PC).
- the light guide sheet 150 includes a light-emitting surface 151, a bottom surface 152, and a plurality of circular arc-shaped recesses 153.
- the light-emitting surface 151 is formed on one side of the light guide sheet 150 and faces the liquid crystal display panel 101 for allowing the light of the light source 120 to be emitted to the liquid crystal display panel 101.
- the bottom surface 152 is formed on the other side of the light guide sheet 150 and faces the substrate 130.
- the arcuate recess 153 is formed on the bottom surface 152 for receiving and encapsulating the light source 120.
- the opening width of each of the arcuate recesses 153 is at least greater than the width of each of the light sources 120 such that the light source 120 is received in the arcuate recess 153 of the light guide sheet 150.
- the concave lens shape or size of the arcuate recess 153 can also be adjusted to form an optimal and uniform surface source, depending on the actual needs of the user.
- a light source 120 can be accommodated in each of the circular arc-shaped recesses 153.
- at least a plurality of light sources 120 may be accommodated in each of the circular arc-shaped recesses 153.
- the circular arc-shaped recess 153 may have a circular arc-shaped cross-sectional shape and may serve as a concave lens (concave). Lens) for diffusing light from the light source 120.
- the circular arc-shaped recess 153 may have a circular opening, and the circular opening of each circular arc-shaped recess 153 has a first length L1 and a second length L2, wherein the first length L1 is greater than the second length L2.
- the first length L1 is the maximum length of the arcuate recess 153, for example between 1 mm (mm) and 5 cm (cm), or between 5 Mm and 3 Between cm.
- the first length L1 is parallel to the long axis direction of the circular arc-shaped recess 153, and the long-axis direction of the circular arc-shaped recess 153 is parallel to the long-axis direction of the substrate 130.
- the second length L2 is, for example, perpendicular to the first length L1, for example between 1 Between mm and 3 cm, or between 5 mm and 2 cm.
- the ratio of the first length L1 and the second length L2 may be the same as the aspect ratio of the long rectangular substrate 130, such as 4:3 or 16:9.
- the light of the light source 120 can be diffused and homogenized by the circular arc-shaped concave portion 153 of the light guide sheet 150 to achieve the effect of mixing light to provide a uniform surface light source to the liquid crystal display panel 101.
- the circular arc-shaped concave portion 153 has a long light diffusion length on the first length L1 (long axis direction), it has a preferable lateral diffusion effect. Therefore, by the arcuate recesses 153 having different lengths, the long axis direction of each arcuate recess 153 can be parallel to the long axis direction of the substrate 130, and more light is diffused laterally in the long axis direction of the substrate 130.
- the light of the light source 120 can be more uniformly diffused corresponding to the aspect ratio or size of the display device, and the number of the light sources can be reduced at the same time, thereby reducing the cost and energy consumption of the backlight module 100.
- FIG. 3A and 3B there are shown cross-sectional views of arcuate recesses in accordance with an embodiment of the present invention.
- the curved surface tangent of the circular arc-shaped concave portion 153 and the bottom surface 152 have a first angle ⁇ 1, for example, 110 to 175 degrees.
- the curved surface tangent of the circular arc-shaped recess 153 has a second angle ⁇ 2 with the bottom surface 152, for example, 90 degrees to 165 degrees.
- the first angle ⁇ 1 is greater than the second angle ⁇ 2, so that the circular arc-shaped recesses 153 can have different curved shapes in the directions of the first length L1 and the second length L2, respectively, and can have different lateral diffusion effects.
- the light guide sheet 150 may further include a fluorescent layer 154 formed on an inner surface of each of the circular arc-shaped recesses 153 and excited by the light of the light source 120 to emit visible light. Therefore, by the fluorescent layer 154, the luminous efficiency of the light source 120 can be improved or the color of the light source 120 can be changed.
- the substrate 130 on which the light source 120 is arranged may be first disposed on the back plate 110, and then the light guide sheet 150 may be disposed on the substrate 130.
- the light source 120 is correspondingly housed and packaged in the arcuate concave portion 153 of the light guide sheet 150.
- the display panel 101 is disposed on the light guide sheet 150 to complete the display device.
- the light of the light source 120 of the backlight module 100 can be homogenized to form a uniform planar light source. Since the light of the light source 120 is mixed by the concave lens of the light guide sheet 150 in advance, the light mixing space required for the light can be shortened, and the thickness of the backlight module 100 can be reduced. Furthermore, the arc-shaped recesses 153 of different lengths can more uniformly diffuse the light of the light source 120 corresponding to the aspect ratio or size of the display device, and simultaneously reduce the number of light sources to reduce the cost and energy of the backlight module 100. Cost.
- the light-emitting surface 151 of the light guide sheet 150 may be provided with a plurality of protruding structures 155 to further correct the direction of the light to increase the light collecting effect and improve the front luminance.
- the protruding structures 155 may be, for example, prismatic or semi-circular convex or concave structures or the like.
- the light-emitting surface 151 may have a matte finish or a scattering point design to homogenize the light of the light source 120 and reduce the phenomenon of light unevenness (Mura).
- the backlight module and the display device of the present invention can homogenize the light of the light source through the light guide sheet to form a uniform planar light source. Furthermore, the arc-shaped concave portion of the light guide sheet can laterally diffuse the light of the light source corresponding to the aspect ratio or size of the display device, thereby reducing the number of light sources and reducing the cost and energy consumption of the backlight module.
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Planar Illumination Modules (AREA)
Abstract
Description
Claims (18)
- 一种背光模块,包括:基板;多个光源,设置于所述基板上;以及导光片,设置于所述基板上,其中所述导光片包括多个圆弧形凹部,所述光源是容置于所述圆弧形凹部内,每一所述圆弧形凹部具有第一长度及第二长度,其中所述第一长度是大于所述第二长度,所述第一长度是平行于所述基板的长轴方向。
- 根据权利要求1所述的背光模块,其中所述第一长度介于1毫米与5公分之间。
- 根据权利要求2所述的背光模块,其中所述第二长度介于1毫米与3公分之间。
- 根据权利要求2所述的背光模块,其中所述第一长度及所述第二长度的比例相同于所述基板的长宽比。
- 根据权利要求4所述的背光模块,其中所述第一长度及所述第二长度的比例为4:3或16:9。
- 根据权利要求2所述的背光模块,其中在所述第一长度上每二相邻所述光源之间的第一间距是大于在所述第二长度上每二相邻所述光源之间的第二间距。
- 根据权利要求1所述的背光模块,其中每一所述圆弧形凹部中容置有一个所述光源。
- 根据权利要求1所述的背光模块,其中每一所述圆弧形凹部中容置有多个所述光源。
- 一种背光模块,包括:基板;多个光源,设置于所述基板上;以及导光片,设置于所述基板上,其中所述导光片包括多个圆弧形凹部,所述光源是容置于所述圆弧形凹部内,所述圆弧形凹部的长轴方向是平行于所述基板的长轴方向。
- 根据权利要求9所述的背光模块,其中每一所述圆弧形凹部具有第一长度及第二长度,所述第一长度是大于所述第二长度,所述第一长度是平行于所述圆弧形凹部的长轴方向。
- 根据权利要求10所述的背光模块,其中所述第一长度介于1毫米与5公分之间。
- 根据权利要求10所述的背光模块,其中所述第二长度介于1毫米与3公分之间。
- 根据权利要求10所述的背光模块,其中所述第一长度及所述第二长度的比例相同于所述基板的长宽比。
- 根据权利要求13所述的背光模块,其中所述第一长度及所述第二长度的比例为4:3或16:9。
- 根据权利要求10所述的背光模块,其中在所述第一长度上每二相邻所述光源之间的第一间距是大于在所述第二长度上每二相邻所述光源之间的第二间距。
- 根据权利要求9所述的背光模块,其中每一所述圆弧形凹部中容置有一个所述光源。
- 根据权利要求9所述的背光模块,其中每一所述圆弧形凹部中容置有多个所述光源。
- 一种显示装置,包括:显示面板;以及背光模块,包括:基板;多个光源,设置于所述基板上;以及导光片,设置于所述基板上,其中所述导光片包括多个圆弧形凹部,所述光源是容置于所述圆弧形凹部内,所述圆弧形凹部的长轴方向是平行于所述基板的长轴方向。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US13/636,701 US9557601B2 (en) | 2012-07-19 | 2012-07-31 | Backlight module and display apparatus |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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CN201210250272.8A CN102759052B (zh) | 2012-07-19 | 2012-07-19 | 背光模块及显示装置 |
CN201210250272.8 | 2012-07-19 |
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WO2014012277A1 true WO2014012277A1 (zh) | 2014-01-23 |
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PCT/CN2012/079417 WO2014012277A1 (zh) | 2012-07-19 | 2012-07-31 | 背光模块及显示装置 |
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US (1) | US9557601B2 (zh) |
CN (1) | CN102759052B (zh) |
WO (1) | WO2014012277A1 (zh) |
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CN104501050A (zh) * | 2014-12-31 | 2015-04-08 | 深圳市华星光电技术有限公司 | 光源模块及具有该光源模块的背光模组 |
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CN102943975B (zh) * | 2012-11-05 | 2015-11-25 | 深圳市华星光电技术有限公司 | 背光模块及显示装置 |
US10180229B2 (en) * | 2012-12-17 | 2019-01-15 | Lg Innotek Co., Ltd. | Lighting unit for vehicle |
CN108388047A (zh) * | 2018-02-24 | 2018-08-10 | 惠科股份有限公司 | 一种背光模组及显示装置 |
JP6703312B2 (ja) * | 2018-05-31 | 2020-06-03 | 日亜化学工業株式会社 | 発光モジュールおよび面発光光源 |
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JP7007598B2 (ja) * | 2018-12-14 | 2022-02-10 | 日亜化学工業株式会社 | 発光装置、発光モジュール及び発光装置の製造方法 |
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US20160274415A1 (en) | 2016-09-22 |
CN102759052A (zh) | 2012-10-31 |
US9557601B2 (en) | 2017-01-31 |
CN102759052B (zh) | 2014-12-17 |
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