CN102287715B - Large-area uniform surface light source device - Google Patents
Large-area uniform surface light source device Download PDFInfo
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- CN102287715B CN102287715B CN201110243141.2A CN201110243141A CN102287715B CN 102287715 B CN102287715 B CN 102287715B CN 201110243141 A CN201110243141 A CN 201110243141A CN 102287715 B CN102287715 B CN 102287715B
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Abstract
The invention discloses a large-area uniform surface light source device which comprises four or two LED linear array light sources, a large-area diffusion-scattering plate and a large-area body diffusion plate. The large-area diffusion-scattering plate is mutually parallel to the large-area body diffusion plate, and an air interval layer is arranged between the parallel large-area diffusion-scattering plate and large-area body diffusion plate; when the LED linear array light sources are four, the four LED linear array light sources are, in parallel, respectively arranged on four side surfaces of the large-area body diffusion-scattering plate vertical to the large-area diffusion-scattering plate; when the LED linear array light source is two, the two LED linear array light sources are, in parallel, respectively arranged on two side surfaces of the large-area body diffusion-scattering plate vertical to the large-area diffusion-scattering plate. The LED linear array light sources illuminate the large-area diffusion-scattering plate from the side surface of the air interval layer in a grazing incidence manner to form large-area light source radiation, and the surface light source radiation is outputted through the large-area body diffusion plate in a scattering/diffusion manner again, thus an output surface light source is homogenized, and the high-uniformity large-area surface light source output can be obtained.
Description
Technical field
The present invention relates to area source and specifically refer to a kind of planar light source device with high radiance, high uniformity, overlarge area.
Background technology
Uniform area light source, because having application extremely widely, is the heat subject of light source technology research always.Existing a lot of relevant article is reported at present, even patent and product.
The formation of area source, the simplest method is integrating sphere method, applies one or more light source input integral balls, after spheroid inside surface multiple reflections, from aperture or the small size opening output light on integrating sphere surface.The most typical representative is Lan Fei Optical Co., Ltd (Lab sphere) under the bold and generous group of Britain manufacturing, it is famous to produce integrating sphere, researched and developed multiple integrating sphere uniform source of light product.Because integrating sphere output window size is subject to the restriction of sphere diameter, can not manufacture Large-Area-Uniform output face light source; Because the light loss of integrating sphere is very large, its output light intensity is subject to great restriction simultaneously.
The most practical area source is the backlight that application all kinds optical plates (LGP) marginal ray technology (Side Light) are manufactured at present, has been widely used in LCDs (LCD), as LCD TV, computing machine LCDs, mobile phone etc.But back light source technique can only be applied to display device.
Also by patent report application LED module and several optical element, form single little area source optical system in recent years, then these single optical systems are assembled into larger area source.The complicacy of its structure and technique, the limitation of technology, can not realize the area source with high radiance, high uniformity, overlarge area equally.
Summary of the invention
The defect existing based on above-mentioned prior art, the object of the invention is to propose a kind of have high radiance, overlarge area uniform surface light source device.
Large-Area-Uniform planar light source device of the present invention, comprising: LED array light source, large area diffuse scattering plate and large area body diffuser plate.Large area diffuse scattering plate and large area body diffuser plate are parallel to each other, and the spacing for Ceng， airspace, airspace layer between parallel plane is the height of light-focusing type LED linear array device.LED array light source is four or two, and when LED array light source is four, opposing parallel is positioned at perpendicular to large area unrestrained respectively. on four sides of scatter plate, large area body diffuser plate, be also on four sides of airspace layer; When LED array light source is two, opposing parallel is positioned on two sides perpendicular to large area diffuse scattering plate, large area body diffuser plate respectively, is also on two sides that airspace layer is relative.The linear array orientation of LED array light source is parallel to airspace layer.
Described large area diffuse scattering plate forms by spray teflon (F4) coating on large-area substrates.
Described large area body diffuser plate is to be base material by high permeability polycarbonate/poly methyl methacrylate plastic (PC/PMMA), before base material polymerization forming, mixes that scattering particle that size is equal to or greater than visible wavelength forms.
Described LED array light source is a cylindrical lens to be installed before each LED device in LED array light source form, the bus of cylindrical lens perpendicular to the optical axis of LED output beam, be parallel to large area diffuse scattering board plane, the distance of cylindrical lens and LED device remains on LED output beam is collimated along optical axis direction.
LED output beam, along cylindrical lens generatrix direction compression, is transformed to the light beam of flat ellipse light distribution, and this light beam glancing incidence illumination large area from being positioned at four sides of airspace layer or on two sides is dispersed board plane; By fine setting grazing angle, the whole large area diffuse scattering board plane that throws light on, forms the large area area source radiation with diffuse scattering characteristic.This is that a kind of smooth glancing incidence forms the physical process of area source in diffuse surface.This area source radiation sees through large area body diffuser plate, again because of scattering/diffusion output, because of and further make again output face light source homogenising, thereby acquisition has the large area area source of high uniformity, export.
Advantage of the present invention is:
1. structure of optical means is simple, and manufacturing process is easy, and application the present invention manufactures principle and method, can manufacture the area source of practical large area, the output of high luminous power, the output of high uniformity lambert's radiation characteristic.
2. according to manufacture principle of the present invention and method, application has the light-focusing type LED linear array of different spectral radiance as input light source, can obtain the large area light output of required spectral distribution, can manufacture solar simulator and polytype area source of novel overlarge area, be applied to test, the calibration of optical device, instrument, product, also can manufacture the backlight of super brightness output.
accompanying drawing explanation
Fig. 1 is the structural representation of Large-Area-Uniform planar light source device;
Fig. 2 is that to make LED optical beam transformation be the action diagram of flat ellipse light distribution light beam to cylindrical lens;
Fig. 3 is linear array LED flat ellipse light beam schematic diagram.
embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail:
Fig. 1 is the structural representation of Large-Area-Uniform planar light source device of the present invention, and this device consists of LED array light source 1, large area diffuse scattering plate 5 and large area body diffuser plate 3 parts.Large area diffuse scattering plate and large area body diffuser plate are parallel to each other, and are airspace layer 4 between parallel plane, and the spacing of airspace layer is the height of LED linear array device.LED array light source can be four, or two, if two, be arranged on two relative sides of airspace layer 4, the irradiation zone of two side LED light beams on large area diffuse scattering board plane superposeed mutually, improve greatly the homogenising degree of LED irradiance in scatter plate plane.For strengthening the radiance light output of uniform surface light source device, 4 LED array light sources can be installed, be arranged on respectively four sides of airspace layer 4, install symmetrically.
Large area diffuse scattering plate 5 forms by spray teflon (F4) coating on large-area substrates, substrate requires good rigidly, surface is optical flat, and spraying rear surface requires the scattering surface for desirable lambert's diffusive property of high scattering efficiency, low scattering loss.
Large area body diffuser plate 3 be application to have high permeability PC/PMMA be optical element, before base material polymerization forming, participate in that scattering particle makes.This diffuser plate is the scatter plate with whole scattering mechanism, in the surface of diffuser plate and body, all plays scattering process, and wherein the efficient light scattering coefficient of scattering particle can reach more than 78%.Volume scattering type scatter plate has overcome the weakness of area scattering, has high light scattering, has both the good transparency simultaneously, and scatter plate has mist degree more than more than 80% light transmission rate and 90%, makes light output realize soft, even.
LED array light source 1 forms by a cylindrical lens 2 being installed before each LED device of LED array light source 1, and make the bus of cylindrical lens perpendicular to LED output beam optical axis, be parallel to large area diffuse scattering board plane.
The forming process of the Large-Area-Uniform light beam of apparatus of the present invention:
The distance of adjusting cylindrical lens 2 and LED device 1, makes LED output beam collimate along optical axis direction.Fig. 2 illustrates that it is the effect that cross section is flat ellipse light distribution light beam that cylindrical lens makes light-focusing type LED optical beam transformation.The light that LED light source 1 sends, through cylindrical lens 2, makes the light beam that LED orientation is dispersed in the optical axial plane vertical with cylindrical lens bus, assemble collimation; Asymmetry due to cylindrical lens, the focusing rate of LED transmitting light beam in the cross section parallel with cylindrical lens bus is zero, the angle of divergence of LED transmitting light beam does not change, so the light beam A of LED output circular symmetry in Fig. 2, light beam A is transformed to flat ellipse light beam B through secondary optics cylindrical lens 2; A1 represents the half-power region of light distribution in LED output beam; B1 represents the half-power region of flat ellipse light beam B light distribution.
Fig. 3 is the flat elliptical beam diagrammatic cross-section of linear array LED.Adjust the spacing of adjacent devices in linear array LED, make the outer peripheral areas of half-power output area B1 of each adjacent LED illuminating bundle light intensity on large area diffuse scattering board plane overlapped, improve the even voltinism of LED irradiance in scatter plate plane.
LED array light source is dispersed board plane through cylindrical lens 2 transmission output light from two side glancing incidence illumination large area of large area diffuse scattering plate, fine setting grazing angle, make the bright whole large area diffuse scattering board plane of output illumination, form the large area area source radiation with diffuse scattering characteristic.This is that a kind of smooth glancing incidence forms the physical process of area source in diffuse surface.Control the forward current of each device of LED linear array simultaneously, make the irradiance further homogenising of LED in large area scatter plate plane.This area source radiation sees through large area body diffuser plate, again because of scattering/diffusion output, because of and further make again output face light source homogenising, thereby acquisition has the large area area source of high uniformity, export.
Claims (3)
1. a Large-Area-Uniform planar light source device, comprising: LED array light source (1), large area diffuse scattering plate (5) and large area body diffuser plate (3); Large area diffuse scattering plate and large area body diffuser plate are parallel to each other, and are airspace layer (4) between parallel plane, and the spacing of airspace layer is the height of light-focusing type LED linear array device; LED array light source is four or two; When LED array light source is four, opposing parallel is positioned on four sides perpendicular to large area diffuse scattering plate, large area body diffuser plate respectively, is also on four sides of airspace layer; When LED array light source is two, opposing parallel is positioned on two sides perpendicular to large area diffuse scattering plate, large area body diffuser plate respectively, is also on two sides that airspace layer is relative; The linear array orientation of LED array light source is parallel to airspace layer; It is characterized in that:
Described LED array light source is a cylindrical lens to be installed before each LED device in LED array light source form, the bus of cylindrical lens perpendicular to the optical axis of LED output beam, be parallel to large area diffuse scattering board plane, the distance of cylindrical lens and LED device remains on LED output beam is collimated along optical axis direction;
LED output beam compresses along cylindrical lens generatrix direction, be transformed to the light beam of flat ellipse light distribution, this light beam glancing incidence from being positioned at four sides of airspace layer or on two sides whole large area diffuse scattering board plane that throws light on, formation has the large area area source radiation of diffuse scattering characteristic, this area source radiation sees through large area body diffuser plate, again because of scattering/diffusion output, because of and further make again output face light source homogenising, thereby obtain the large area area source output with high uniformity.
2. according to a kind of Large-Area-Uniform planar light source device of claim 1, it is characterized in that: described large area diffuse scattering plate forms by spray teflon coating on large-area substrates.
3. according to a kind of Large-Area-Uniform planar light source device of claim 1, it is characterized in that: described large area body diffuser plate is to be base material by high permeability PC/PMMA, before base material polymerization forming, mix that scattering particle that size is equal to or greater than visible wavelength forms.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110243141.2A CN102287715B (en) | 2011-08-23 | 2011-08-23 | Large-area uniform surface light source device |
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| CN201110243141.2A CN102287715B (en) | 2011-08-23 | 2011-08-23 | Large-area uniform surface light source device |
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| CN102287715A CN102287715A (en) | 2011-12-21 |
| CN102287715B true CN102287715B (en) | 2014-02-19 |
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| CN201110243141.2A Expired - Fee Related CN102287715B (en) | 2011-08-23 | 2011-08-23 | Large-area uniform surface light source device |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103278448B (en) * | 2013-05-10 | 2015-04-29 | 浙江大学 | Illumination device for improving fruit line scanning spectral imaging |
| CN103336387B (en) * | 2013-07-05 | 2015-12-02 | 深圳市华星光电技术有限公司 | Side-light type back light and there is the liquid crystal display of this backlight |
| US9322975B2 (en) | 2013-07-05 | 2016-04-26 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | Side-lighting backlight and liquid crystal display comprising the same |
| CN105090780A (en) * | 2015-07-12 | 2015-11-25 | 李�远 | Large-area collimated light source |
| CN106641867A (en) * | 2016-10-31 | 2017-05-10 | 华侨大学 | Natural light type LED panel lamp |
| CN108709497B (en) * | 2018-04-11 | 2024-04-12 | 中国铁道科学研究院集团有限公司 | Contact net geometric parameters detection device |
| CN110030505B (en) * | 2019-03-22 | 2021-03-23 | 厦门立达信照明有限公司 | A light guide lens and a mask lamp with uniform brightness of the lampshade |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1683974A (en) * | 2004-04-16 | 2005-10-19 | 大日本印刷株式会社 | Diffusion plate, surface light source device and transmission type display device |
| CN101561521A (en) * | 2008-04-15 | 2009-10-21 | 索尼株式会社 | Lens array sheet, light source and liquid crystal display device |
| CN101681056A (en) * | 2007-05-20 | 2010-03-24 | 3M创新有限公司 | Hollow light torus escope backlight |
| CN101681053A (en) * | 2007-05-20 | 2010-03-24 | 3M创新有限公司 | recycling backlights with semi-specular components |
| TW201027192A (en) * | 2008-10-27 | 2010-07-16 | 3M Innovative Properties Co | Semispecular hollow backlight with gradient extraction |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101210657A (en) * | 2006-12-28 | 2008-07-02 | 宏塑工业股份有限公司 | Linear Lighting |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1683974A (en) * | 2004-04-16 | 2005-10-19 | 大日本印刷株式会社 | Diffusion plate, surface light source device and transmission type display device |
| CN101681056A (en) * | 2007-05-20 | 2010-03-24 | 3M创新有限公司 | Hollow light torus escope backlight |
| CN101681053A (en) * | 2007-05-20 | 2010-03-24 | 3M创新有限公司 | recycling backlights with semi-specular components |
| CN101561521A (en) * | 2008-04-15 | 2009-10-21 | 索尼株式会社 | Lens array sheet, light source and liquid crystal display device |
| TW201027192A (en) * | 2008-10-27 | 2010-07-16 | 3M Innovative Properties Co | Semispecular hollow backlight with gradient extraction |
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