CN104235761A - Diffusion plate and backlight module - Google Patents
Diffusion plate and backlight module Download PDFInfo
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- CN104235761A CN104235761A CN201310238205.9A CN201310238205A CN104235761A CN 104235761 A CN104235761 A CN 104235761A CN 201310238205 A CN201310238205 A CN 201310238205A CN 104235761 A CN104235761 A CN 104235761A
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- reflective film
- diffuser plate
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- light
- exiting surface
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Abstract
The invention relates to a diffusion plate. The diffusion plate comprises a body. The body is provided with a light incidence face and a light outgoing face which are opposite to each other. An anti-reflection film layer is formed on the light incidence face or the light outgoing face. The anti-reflection film layer comprises multiple anti-reflection films. The thickness of each anti-reflection film is smaller than the wave length of visible light. The invention further relates to a backlight module provided with the diffusion plate.
Description
Technical field
The present invention relates to diffuser plate and backlight module, particularly relate to a kind of diffuser plate for down straight aphototropism mode set and there is the backlight module of this diffuser plate.
Background technology
Backlight module, as a kind of light source module, is often the illumination of the electronic installation such as instrument, display unit.A kind of typical down straight aphototropism mode set comprises multiple light source and the diffuser plate relative with the plurality of light source.Because light source is dispersed arrangement, therefore be vertical incidence at the light entering diffuser plate area just above, and the larger incidence in offset distance zonal ray angle of inclination the more, particularly now for reducing light source usage quantity, space between light sources can be widened and the source light angle of divergence strengthens by diffuser plate of arranging in pairs or groups.The light angle of each position is adjusted to that to disperse light field consistent by diffuser plate.Can make light random scatter containing many granule proliferations in diffuser plate, be a uniform area source after using light guide plate.But, because light diffuser plate not only has the surface reflectivity of material, also have the larger reflectivity of oblique incidence degree higher, light utilization ratio can be caused like this to reduce.
Summary of the invention
In view of this, be necessary to provide a kind of diffuser plate and the backlight module that can overcome the problems referred to above.
A kind of diffuser plate, it comprises a body, and described body has relative incidence surface and exiting surface, and described exiting surface or described exiting surface are formed with anti-reflective film layer, described anti-reflective film layer comprises multi-layer anti-reflective film, and the thickness of every layer of described anti-reflective film is less than the wavelength of visible ray.A kind of backlight module, it comprises described diffuser plate and multiple light source, and described light source is relative with the incidence surface of described diffuser plate.
Relative to prior art, during the light transmission diffuser plate that the light source in the technical program sends, the anti-reflecting layer being arranged at diffuser surface can produce constructive or destructive interference to the light of different wave length or different incidence angles, thus make to reduce light in the reflection produced through the incidence surface of diffuser plate and exiting surface, thus the light extraction efficiency of backlight module can be improved, and improve the utilization ratio of the light of light source outgoing.
Accompanying drawing explanation
Fig. 1 is the backlight module generalized section that the embodiment of the present invention provides.
Fig. 2 is the close-up schematic view along II line in Fig. 1.
Main element symbol description
Following detailed description of the invention will further illustrate the present invention in conjunction with above-mentioned accompanying drawing.
Detailed description of the invention
Refer to Fig. 1 and Fig. 2, the backlight module 100 that first embodiment of the invention provides comprises a diffuser plate 10, multiple light source 20, light source substrate 30, prismatic lens 40 and a diffusion sheet 50.
This diffuser plate 10 is located at the top of described multiple light source 20, and that is, this diffuser plate 10 is relative with the plurality of light source 20.Light source substrate 30 for encapsulating multiple light source 20, to provide electric energy to light source 20.Described light source substrate 30 is located at the below of described multiple light source 20, described light source substrate 30 be also used as reflector plate, for by the light reflection from light source 20 to diffuser plate 10, to improve the light utilization of light source 20.
Described diffuser plate 10 comprises body 11 and is formed at the first anti-reflective film layer 12 of body 11 side and is formed at the second anti-reflective film layer 13 of the relative opposite side of body 11.
Described body 11 is made up of light transmissive material, and it has relative incidence surface 110 and exiting surface 112.The material of described body 11 can for two kinds or more of the formed mixture in Merlon (PC), polymethyl methacrylate (PMMA), methyl methacrylate, styrene copolymerized compound (MS), PET (PETG), polystyrene (PS) or above-mentioned material.Multiple smooth diffusion particle is dispersed with in described body 11.The plurality of smooth diffusion particle is for spreading the light entering body 11 from incidence surface 110.The material of the plurality of smooth diffusion particle can for two kinds in silicon, silica, titanium dioxide, methyl-propyl acid methyl esters, polymethyl methacrylate (PMMA), styrene copolymerized compound (MS), polystyrene (PS) or above-mentioned material or more in the mixture that forms.
Described first anti-reflective film layer 12 is formed at the side of diffuser plate 10 towards light source 20.Described first anti-reflective film layer 12 adopts the mode of plated film to be formed at the incidence surface 110 of diffuser plate 10.Described first anti-reflective film layer 12 comprises multi-layer anti-reflective film.The thickness of every layer of described anti-reflective film is all less than visible wavelength.Adjacent two layers anti-reflective film adopts the different material of refractive index to make, and the number of plies of described multi-layer anti-reflective film is 10 layers to 100 layers.Thus, when light to the first anti-reflective film layer 12 of light source 20 outgoing, constructive or destructive interference can be produced between each anti-reflecting layer, the reflection of light can be reduced, thus make the light of different wave length and different incidence angles increase transmissivity, thus the light increasing light source 20 outgoing enters the light inlet efficiency of diffuser plate 10.
Described second anti-reflective film layer 13 is formed at the exiting surface 112 of diffuser plate 10.Described second anti-reflective film layer 13 adopts the mode of plated film to be formed at the exiting surface 112 of diffuser plate 10.Described second anti-reflective film layer 13 comprises multi-layer anti-reflective film.The thickness of every layer of described anti-reflective film is all less than visible wavelength.Adjacent two layers anti-reflective film adopts the different material of refractive index to make, and the number of plies of described multi-layer anti-reflective film is 10 layers to 100 layers.Thus, when light to the second anti-reflective film layer 13 of body 11 outgoing, constructive or destructive interference can be produced between each anti-reflecting layer, the reflection of light can be reduced, thus make the light of different wave length and different incidence angles increase transmissivity, thus increase the light from diffuser plate 10 outgoing.
Described prismatic lens 40 is arranged at the side of the exiting surface 112 of diffuser plate 10, for adjusting the angle of the light of exiting surface 112 side outgoing.Described diffusion sheet 50 is arranged at the side of prismatic lens 40 away from diffuser plate 10, for spreading the light of prismatic lens 40 outgoing.
Be understandable that, described diffuser plate 10 also only can be provided with antireflection film plating layer in exiting surface 112 or incidence surface 110 side.Namely described diffuser plate 10 only can comprise one of them of the first anti-reflective film layer 12 and the second anti-reflective film layer 13.
During the light transmission diffuser plate 10 that the light source 20 in the technical program sends, the anti-reflecting layer being arranged at diffuser plate 10 surface can produce constructive or destructive interference to the light of different wave length or different incidence angles, thus make to reduce light in the reflection produced through the incidence surface of diffuser plate 10 and exiting surface, thus the light extraction efficiency of backlight module can be improved, and improve the utilization ratio of the light of light source outgoing.
Be understandable that, those skilled in the art also can do other change in spirit of the present invention, all should be included within the present invention's scope required for protection.
Claims (10)
1. a diffuser plate, it comprises a body, described body has relative incidence surface and exiting surface, it is characterized in that, described exiting surface or described exiting surface are formed with anti-reflective film layer, described anti-reflective film layer comprises multi-layer anti-reflective film, and the thickness of every layer of described anti-reflective film is less than the wavelength of visible ray.
2. diffuser plate as claimed in claim 1, it is characterized in that, the number of plies of described anti-reflective film is 10 layers to 100 layers.
3. diffuser plate as claimed in claim 1, is characterized in that, in multi-layer anti-reflective film, the refractive index of adjacent two layers anti-reflective film is different.
4. diffuser plate as claimed in claim 1, is characterized in that, be provided with multiple smooth diffusion particle in described body.
5. a diffuser plate, it comprises a body, described body has relative incidence surface and exiting surface, it is characterized in that, described exiting surface and described exiting surface are all formed with anti-reflective film layer, described anti-reflective film layer comprises multi-layer anti-reflective film, and the thickness of every layer of described anti-reflective film is less than the wavelength of visible ray.
6. diffuser plate as claimed in claim 5, it is characterized in that, the number of plies of described anti-reflective film is 10 layers to 100 layers.
7. diffuser plate as claimed in claim 5, is characterized in that, in multi-layer anti-reflective film, the refractive index of adjacent two layers anti-reflective film is different.
8. diffuser plate as claimed in claim 5, is characterized in that, be provided with multiple smooth diffusion particle in described body.
9. a backlight module, it comprises as the diffuser plate as described in arbitrary in claim 1 to 8 and multiple light source, and described light source is relative with the incidence surface of described diffuser plate.
10. backlight module as claimed in claim 9, it is characterized in that, described backlight module also comprises prismatic lens, and described prismatic lens is arranged at the side of the exiting surface of described diffuser plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310238205.9A CN104235761A (en) | 2013-06-17 | 2013-06-17 | Diffusion plate and backlight module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310238205.9A CN104235761A (en) | 2013-06-17 | 2013-06-17 | Diffusion plate and backlight module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104235761A true CN104235761A (en) | 2014-12-24 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310238205.9A Pending CN104235761A (en) | 2013-06-17 | 2013-06-17 | Diffusion plate and backlight module |
Country Status (1)
| Country | Link |
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| CN (1) | CN104235761A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109655949A (en) * | 2019-02-22 | 2019-04-19 | 海迪科（南通）光电科技有限公司 | It is a kind of uniformly to go out light diffusing sheet structure and its manufacturing method |
| CN110162199A (en) * | 2018-02-13 | 2019-08-23 | 宸美（厦门）光电有限公司 | Touch panel and preparation method thereof |
| CN114203034A (en) * | 2021-11-24 | 2022-03-18 | 武汉华星光电半导体显示技术有限公司 | Flexible display module |
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| JP2002318305A (en) * | 2001-04-24 | 2002-10-31 | Mitsui Chemicals Inc | Reflecting sheet and side light type surface light source device using the same |
| US20040051950A1 (en) * | 2002-09-13 | 2004-03-18 | Fuji Photo Film Co., Ltd. | Anti-reflection film, organic EL device, and display medium using the anti-reflection film and the organic EL device |
| US20070110386A1 (en) * | 2005-11-12 | 2007-05-17 | Tien-Hon Chiang | Device having combined diffusing, collimating, and color mixing light control function |
| CN101196573A (en) * | 2006-12-06 | 2008-06-11 | 鸿富锦精密工业（深圳）有限公司 | Optical plate |
| CN101435884A (en) * | 2007-11-15 | 2009-05-20 | 鸿富锦精密工业（深圳）有限公司 | Diffusing plate and backlight module unit using the same |
| CN102537767A (en) * | 2010-12-31 | 2012-07-04 | 宏腾光电股份有限公司 | Display backlight module with multiple multilayer film reflectors and manufacturing method for same |
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2013
- 2013-06-17 CN CN201310238205.9A patent/CN104235761A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002318305A (en) * | 2001-04-24 | 2002-10-31 | Mitsui Chemicals Inc | Reflecting sheet and side light type surface light source device using the same |
| US20040051950A1 (en) * | 2002-09-13 | 2004-03-18 | Fuji Photo Film Co., Ltd. | Anti-reflection film, organic EL device, and display medium using the anti-reflection film and the organic EL device |
| US20070110386A1 (en) * | 2005-11-12 | 2007-05-17 | Tien-Hon Chiang | Device having combined diffusing, collimating, and color mixing light control function |
| CN101196573A (en) * | 2006-12-06 | 2008-06-11 | 鸿富锦精密工业（深圳）有限公司 | Optical plate |
| CN101435884A (en) * | 2007-11-15 | 2009-05-20 | 鸿富锦精密工业（深圳）有限公司 | Diffusing plate and backlight module unit using the same |
| CN102537767A (en) * | 2010-12-31 | 2012-07-04 | 宏腾光电股份有限公司 | Display backlight module with multiple multilayer film reflectors and manufacturing method for same |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110162199A (en) * | 2018-02-13 | 2019-08-23 | 宸美（厦门）光电有限公司 | Touch panel and preparation method thereof |
| CN109655949A (en) * | 2019-02-22 | 2019-04-19 | 海迪科（南通）光电科技有限公司 | It is a kind of uniformly to go out light diffusing sheet structure and its manufacturing method |
| CN114203034A (en) * | 2021-11-24 | 2022-03-18 | 武汉华星光电半导体显示技术有限公司 | Flexible display module |
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Application publication date: 20141224 |