CN201622390U - Laser projection display system - Google Patents
Laser projection display system Download PDFInfo
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- CN201622390U CN201622390U CN2010200625486U CN201020062548U CN201622390U CN 201622390 U CN201622390 U CN 201622390U CN 2010200625486 U CN2010200625486 U CN 2010200625486U CN 201020062548 U CN201020062548 U CN 201020062548U CN 201622390 U CN201622390 U CN 201622390U
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Abstract
The utility model relates to a laser projection display system. The principle is that: the light beam of the laser light source is expanded by a beam expansion system; the light beam is transformed by a shaping and homogenizing device to irradiate a spatial light modulator for loading an image source; and the light beam is projected to an input end face of an optical fibre display screen from a projection lens. The input end of the optical fibre display screen consists of array multi-mode optical fibre bundles which are arranged closely; the end face of one optical fibre is a pixel point; and the output end thereof is fixed on one side of a transparent substrate according to the display scale. A multi-mode optical fibre array partitions the laser beam projected on the input end face; and the optical fibre of each pixel point is transmitted to the output end face by different multi-mode optical fibres to reduce the coherence of the laser. The system integrates the optical fibre transmission and the optical fibre display, so the system can reduce the speckle effect of laser, improve the definition of the image, realize large-screen display and have the advantages of simple structure, long life, vivid display colour, high brightness, high contrast and the like.
Description
[technical field]
The utility model belongs to the laser display technology field, is specifically related to a kind of laser light projection display system that has optical fibre display screen.
[background technology]
What the tradition projection display apparatus generally used is light sources such as metal halid lamp, UHE bulb, UHP bulb.These light sources are owing to its intrinsic luminescence mechanism, and its life-span has only several thousand hours usually, contains UV and infrared IR light in the radiation spectrum, therefore need ultraviolet and infrared fileter, increase the complicacy of light path system design.Adopt led light source replace traditional bulbs light source in recent years, be used for projection display system, have long service life, volume is little, response speed is fast, advantages such as no ultraviolet or infrared radiation.Yet,,, influenced the application space of LED on projection display technique greatly seeming not enough aspect high brightness, the large screen display because it belongs to lambert's illuminating source.
Adopt laser to have a lot of advantages as the light source of optical projection system with respect to other light sources: laser monochromaticity is good, be line spectrum, has very high saturation degree, its colour gamut coverage rate can reach human eye can discern more than 90% of color space, be more than 2 times of NTSC standard, break through the deficiency of existing display technique color gamut space, realize real more color rendition.Because the wavelength of laser beam is fixed, thereby looks more comfortable, does not have the dazzling uncomfortable sensation of the sort of bulb.The more important thing is there is not the ultraviolet ray of conventional light source, make and loosen very much when eyes are seen picture.The electro-optical efficiency height of while laser, good directionality is easy to realize that high-brightness projection shows.The laser emitting light beam is generally linearly polarized light, for the optical projection system based on LOCS or LCD photomodulator, polarized light source will reduce the use of polaroid quantity, increase light transmission rate, reduce the complicacy of light path system design, improve the brightness of laser display.In addition, laser display technology also has contrast height, life-span length, environmental protection, advantage such as energy-conservation, and will become of future generation the demonstration is one of the main flow display technique in panchromatic demonstration epoch.
Because the coherence of laser makes when beam of laser shines on the rough surface with diffusive property, spot has appearred in the screen display, i.e. laser speckle, and this has influenced the sharpness that activity video reproduces greatly, address this problem, make optics and screen system become complicated.Want eliminate laser speckle, its essence is the room and time coherence who reduces laser.Method commonly used at present is the coherence who adopts space bit phase modulation technique to reduce laser, by components and parts or the display screen in the periodic vibration Laser Transmission path, utilize temporal average effect, reduce laser speckle effect, improve the sharpness of image.Application number is 200510115472.2, the Chinese patent that name is called " illuminator of eliminate laser speckle and the optical projection system of using this illuminator " adopts diffraction optical element, be used for to be divided into a plurality of beamlets from the laser beam that lasing light emitter sends, and periodically motion is with the speckle time average with laser beam.Application number is 200820108219.3, the Chinese patent that name is called " a kind of eliminating coherence device " vibrates by vibrating device drive laser projection device, make the image that is produced on the projection screen change fast, utilize vision to stop and reach the purpose that reduces speckle.Application number is 200910110896.8, the Chinese patent that name is called " a kind of optical texture of eliminate laser speckle " adopts voltage modulation signal control PZT modulator element, variation by the PZT element comes the fast moving lenticule, the incident angle of the optical fiber by entering multimode optical fiber behind the lenticule is changed fast, thereby make shoot laser produce the unordered of polarization and position phase, reduce the coherence of light source, reach the purpose of less speckle.Coherence's the technology that available technology adopting expanded laser light frequency spectrum reduces laser is comparatively complicated, more is a coherence who utilizes position phase modulator element to reduce laser, reliability and serviceable life that this has just reduced system, has increased system noise.
The demand to large screen display increases day by day on the market now, and the large scale display screen that adopts LED to be spliced as pixel has been widely used in all kinds of indoor outer public places, as square, market, sports ground etc.But it is further perfect that existing LED class display screen is still waiting on structural design,, maintenance difficulty big as production cost height, energy consumption etc.In addition, the big screen LED display screen still can't fully truly reduce the color of place on color gamut space.Optical fibre display screen provides image as a kind of Large Screen Display Technology with projector, and image is projected the incident end face of optical fiber, and to large-area outgoing end face, the end face of each root optical fiber is equivalent to a pixel via fiber optic conduction.The brightness of projector is depended in the brightness of this class display, do not exist and to cause aging as LED display use for a long time, producing brightness reduces or uneven problem, and the optical fibre display screen use-pattern is flexible, be used in combination with Color Laser Projection Technology, increase brightness, saturation degree, contrast and the color restoration capability of display screen, have more wide application prospect.
[utility model content]
The purpose of this utility model provides a kind of laser light projection display system, can reduce the coherence of laser preferably, reduces the speckle effect in the laser display.
The utility model solves the problems of the technologies described above by the following technical programs: a kind of laser light projection display system comprises:
Laser instrument as projection light source;
Described laser instrument is sent the beam-expanding system that light beam expands bundle;
The outgoing beam of described collimating and beam expanding system is carried out beam shaping, the homogenize device of shaping and homogenising;
The spatial light modulator that is used for the load image source;
Described spatial light modulator outgoing beam is carried out the projecting lens of focal imaging;
The optical fibre display screen that is used to show described image source that has input end and output terminal.
Described laser instrument can be the composite light source of monochromatic or three looks.
The preferred version of beam shaping, homogenize system adopts a pair of plano-convex cylindrical lens raster, by two cylindrical lens raster are positioned in the plane of vertical optical axis, make their cylindrical lens unit orthogonally oriented, two planes are glued together relatively, form lenticular microlens array.Usually adopt double fly eye lens array to be applied in the illuminator in the prior art, this fly eye lens array complex structure, cost are higher.In this external traditional optical projection system, adopt double independently fly's-eye lens, occupy bigger space, and fly's-eye lens becomes corresponding relation before and after requiring, higher to installation specification.
The utility model unites two into one both, simplifies the structure, and has reduced amount of parts, has reduced the requirement to field engineering.
Described spatial modulator can be LCD, LCOS or DMD.
The input end of described optical fibre display screen closely is arranged in fiber array by multimode fiber-optic bundle, and the end face of every optical fiber is a corresponding pixel, and output terminal is fixed on a side of a transparency carrier by displaying ratio.Multimode fiber array is evenly cut apart the laser beam that projects on its input end face, the optical fiber of each pixel transfers to output end face formation general image via the multimode optical fiber of unique correspondence, reduce the coherence of laser, thereby reduced laser speckle effect.
Principle of the present utility model is: the light beam that described laser instrument sends is after described beam-expanding system expands bundle, by described beam shaping, homogenize system laser beam is carried out homogenising and shaping, shine described spatial light modulator, the displayed map image source is carried on the described spatial light modulator, project the input end of described optical fibre display screen by described projecting lens, by the optically-coupled effect, be evenly divided into plurality of pixels and transfer to described optical fibre display screen output terminal demonstration by multimode fiber-optic bundle.Because the mode that this patent adopts Color Laser Projection Technology to combine with optical fibre display screen reduces the speckle effect in the laser display.By multimode fiber array transmission and demonstration laser image, laser beam is cut apart at input end; Not only owing to enter the beamlet of each root optical fiber but also because the difference of incident angle, through different light paths, the coherence who has reduced exit end laser has reduced speckle effect in optical fiber.Simultaneously, this patent also utilizes fiber end face directly as the pixel that shows, has avoided shining the secondary speckle effect that diffuse reflection surface produces.
Advantage of the present utility model is: the utility model is simple in structure, is easy to realize, in addition because the pliability of optical fiber makes the utility model can realize the ultra-thin demonstration of giant-screen.
[description of drawings]
The utility model will be further described in conjunction with the embodiments with reference to the accompanying drawings.
Fig. 1 is the utility model shaping homogenize device vertical view;
Fig. 2 optical fibre display screen output end face synoptic diagram
Fig. 3 is the utility model structural representation.
[embodiment]
Referring to accompanying drawing 3, a kind of laser light projection display system comprises: as the laser instrument 1 of projection light source; Laser instrument 1 is sent the beam-expanding system 2 that light beam expands bundle; Load the spatial light modulator 4 of image; Beam shaping, homogenize device 3 that the light that shines on the spatial light modulator 3 is carried out homogenising and shaping; Be used for the outgoing beam of described spatial light modulator 4 is carried out the projecting lens 5 of focal imaging; The optical fibre display screen 6 that is used to show described image that has input end and output terminal.
Beam shaping, homogenize device 3 are placed gummed by a pair of cylindrical lens raster quadrature and are formed as shown in Figure 1.During enforcement, two cylindrical lens raster can be cut into square, make its two plane staggered relatively, and their cylindrical lens unit orientation perpendicular array.Formed grid cell can be regarded the lenticular two-dimensional lens array of n * n as, realizes that the homogenising of laser beam being carried out changing and shaping and light beam distributes.
As can be seen from Figure 3, the input end of optical fibre display screen 6 closely is arranged in fiber array by multimode fiber-optic bundle, the end face of every optical fiber is a corresponding pixel, and the ranks spacing of described multimode fiber array is according to image enlargement factor and the decision of employed number of fibers.Output terminal is fixed on a side of a transparency carrier by displaying ratio, and Fig. 2 is the demonstration end face of described optical fibre display screen 6.
The enforcement of laser light projection display system described in the utility model as shown in Figure 3.The laser beam that original laser device 1 sends is generally circle or oval hot spot, and light distribution is inhomogeneous, is generally Gaussian distribution.After beam-expanding system 2 expands bundle, incide orthogonal grating array 3 and be transformed into the equally distributed rectangular light beam of intensity, shine the spatial modulator 4 of rectangle; Image is carried on the spatial modulator 4, projects the incident end of optical fibre display screen 6 again by projecting lens 5, transfer to exit end through multimode fiber array again and show.Described multimode fiber array is cut apart the laser beam that projects on its input end face, and the optical fiber of each pixel transfers to output end face via different multimode optical fibers, has reduced the coherence of laser, has reduced laser speckle effect.
Embodiment recited above is the laser projection illuminator of monolithic, in three laser projection system, red, green, blue tricolor laser device is right by orthogonal grating respectively, project on three photomodulators, after ECDC look device closes look, form the projection image source, project on the optical fibre display screen by projecting lens.Described multimode optical fiber can be silica fibre or plastic optical fiber; When adopting plastic optical fiber, utilize the good advantage of its pliability, can realize that ultra-thin large-screen, high brightness, high definition show, are applied in public places such as square, shop, station, harbour.
Need to prove that the beam shaping among Fig. 1, homogenize system 3 are just in order to finish the purpose that the light that shines on the described spatial light modulator is carried out homogenising and shaping.Those skilled in the art can make amendment to it, carry out homogenising and shaping as long as can finish, and for example can also adopt the combination of reshaper and diffraction optical element.
Although illustrated and described embodiment of the present utility model, for the ordinary skill in the art, be appreciated that under the situation that does not break away from principle of the present utility model and spirit and can carry out multiple variation, modification, replacement and modification to these embodiment, scope of the present utility model is limited by claims and equivalent thereof.
Claims (6)
1. laser light projection display system comprises:
As the laser instrument of projection light source,
Described laser instrument is sent the collimating and beam expanding system that light beam collimates and expands bundle,
Described collimating and beam expanding system outgoing beam is carried out beam shaping, the homogenize device of shaping and homogenising,
The spatial light modulator that is used for the load image source,
The outgoing beam of described spatial light modulator is carried out the projecting lens of focal imaging,
It is characterized in that: described laser light projection display system also comprises an optical fibre display screen that is used to show described image source that has input end and output terminal.
2. a kind of laser light projection display system according to claim 1 is characterized in that: the input end of described optical fibre display screen is formed by the multimode fiber-optic bundle dense arrangement; Described output terminal is fixed on a side of a transparency carrier by displaying ratio, and each pixel on the described output terminal is all corresponding one by one with described input end fiber, and the end face of the described optical fiber of each root is a pixel.
3. a kind of laser light projection display system according to claim 2 is characterized in that: described multimode optical fiber is silica fibre or plastic optical fiber.
4. a kind of laser light projection display system according to claim 1, it is characterized in that: described beam shaping, homogenize device are to be placed by two planoconvex post lenticulation unit quadratures, two cylindrical lens raster planar sections are relative, the biconvex microlens array of formation glued together.
5. a kind of laser light projection display system according to claim 1 is characterized in that: described spatial modulator comprises LCD, LCOS or DMD.
6. a kind of laser light projection display system according to claim 1 is characterized in that: described laser instrument is the composite light source of monochromatic or three looks.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010200625486U CN201622390U (en) | 2010-01-20 | 2010-01-20 | Laser projection display system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010200625486U CN201622390U (en) | 2010-01-20 | 2010-01-20 | Laser projection display system |
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| CN201622390U true CN201622390U (en) | 2010-11-03 |
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| CN2010200625486U Expired - Fee Related CN201622390U (en) | 2010-01-20 | 2010-01-20 | Laser projection display system |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104991258A (en) * | 2015-07-16 | 2015-10-21 | 哈尔滨工业大学 | Infrared laser light uniformizing illumination detecting system |
| CN106707523A (en) * | 2017-01-19 | 2017-05-24 | 宁波纳美致生物科技有限公司 | Mechanical stress free multimode fiber beam speckle homogenization system |
| CN107577112A (en) * | 2011-05-10 | 2018-01-12 | 大日本印刷株式会社 | Lighting device, projection type video display apparatus and Optical devices |
| CN108445640A (en) * | 2018-02-28 | 2018-08-24 | 北京控制工程研究所 | A kind of coaxial uniform illumination system of relative pose vision measurement sensor |
| CN109270701A (en) * | 2018-11-21 | 2019-01-25 | 四川云盾光电科技有限公司 | A kind of static state dissipation spot device and laser projection system |
| CN110031979A (en) * | 2019-05-21 | 2019-07-19 | 中国工程物理研究院流体物理研究所 | Light spot homogenizing expands method and device |
| CN110346944A (en) * | 2018-04-08 | 2019-10-18 | 宁波盈芯信息科技有限公司 | A kind of laser speckle grenade instrumentation |
| CN110636270A (en) * | 2018-06-21 | 2019-12-31 | 深圳光峰科技股份有限公司 | Display device |
| CN111025827A (en) * | 2018-10-09 | 2020-04-17 | 成都理想境界科技有限公司 | Laser modulation device, laser light source, scanning display device and projection system |
| CN112068389A (en) * | 2019-06-11 | 2020-12-11 | 宁波舜宇车载光学技术有限公司 | Modular projection system and projection method thereof |
| CN112334803A (en) * | 2018-06-18 | 2021-02-05 | 杜比实验室特许公司 | Pattern noise mitigator and associated methods |
| CN112888972A (en) * | 2018-09-17 | 2021-06-01 | 超级隐形生物科技公司 | System and method for laser scattering, deflection and manipulation |
| CN114397759A (en) * | 2022-01-28 | 2022-04-26 | 天津凌视科技有限公司 | Passive laser homogenizing device and flow type microscopic high-speed imaging system |
-
2010
- 2010-01-20 CN CN2010200625486U patent/CN201622390U/en not_active Expired - Fee Related
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107577112A (en) * | 2011-05-10 | 2018-01-12 | 大日本印刷株式会社 | Lighting device, projection type video display apparatus and Optical devices |
| CN107577112B (en) * | 2011-05-10 | 2020-10-23 | 大日本印刷株式会社 | Illumination device, projection type image display device, and optical device |
| CN104991258A (en) * | 2015-07-16 | 2015-10-21 | 哈尔滨工业大学 | Infrared laser light uniformizing illumination detecting system |
| CN106707523A (en) * | 2017-01-19 | 2017-05-24 | 宁波纳美致生物科技有限公司 | Mechanical stress free multimode fiber beam speckle homogenization system |
| CN108445640A (en) * | 2018-02-28 | 2018-08-24 | 北京控制工程研究所 | A kind of coaxial uniform illumination system of relative pose vision measurement sensor |
| CN110346944A (en) * | 2018-04-08 | 2019-10-18 | 宁波盈芯信息科技有限公司 | A kind of laser speckle grenade instrumentation |
| CN110346944B (en) * | 2018-04-08 | 2021-07-30 | 宁波盈芯信息科技有限公司 | Laser speckle projection device |
| US11536906B2 (en) | 2018-06-18 | 2022-12-27 | Dolby Laboratories Licensing Corporation | Modal-noise mitigator and associated method |
| CN112334803A (en) * | 2018-06-18 | 2021-02-05 | 杜比实验室特许公司 | Pattern noise mitigator and associated methods |
| CN110636270A (en) * | 2018-06-21 | 2019-12-31 | 深圳光峰科技股份有限公司 | Display device |
| CN110636270B (en) * | 2018-06-21 | 2022-02-22 | 深圳光峰科技股份有限公司 | Display device |
| CN112888972B (en) * | 2018-09-17 | 2023-12-22 | 超级隐形生物科技公司 | System and method for laser scattering, deflection and manipulation |
| CN112888972A (en) * | 2018-09-17 | 2021-06-01 | 超级隐形生物科技公司 | System and method for laser scattering, deflection and manipulation |
| CN111025827A (en) * | 2018-10-09 | 2020-04-17 | 成都理想境界科技有限公司 | Laser modulation device, laser light source, scanning display device and projection system |
| CN109270701A (en) * | 2018-11-21 | 2019-01-25 | 四川云盾光电科技有限公司 | A kind of static state dissipation spot device and laser projection system |
| CN110031979A (en) * | 2019-05-21 | 2019-07-19 | 中国工程物理研究院流体物理研究所 | Light spot homogenizing expands method and device |
| CN112068389A (en) * | 2019-06-11 | 2020-12-11 | 宁波舜宇车载光学技术有限公司 | Modular projection system and projection method thereof |
| CN114397759A (en) * | 2022-01-28 | 2022-04-26 | 天津凌视科技有限公司 | Passive laser homogenizing device and flow type microscopic high-speed imaging system |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: ZHONGHANG HUADONG PHOTOELECTRIC CO., LTD. Free format text: FORMER OWNER: HUADONG PHOTOELECTRIC TECHNIQUE INSTITUTE OF ANHUI PROVINCE Effective date: 20110808 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20110808 Address after: 241002 Yijiang District, Wuhu, China Hi tech Development Zone, science and Technology Park Patentee after: Avic Huadong Photoelectric Co., Ltd. Address before: 241002 Yijiang District, Wuhu, China Hi tech Development Zone, science and Technology Park Patentee before: Huadong Photoelectric Technique Institute of Anhui Province |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101103 Termination date: 20170120 |
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| CF01 | Termination of patent right due to non-payment of annual fee |