CN101025548A - Three-lens reflective liquic crystal display projector - Google Patents
Three-lens reflective liquic crystal display projector Download PDFInfo
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- CN101025548A CN101025548A CNA2006100239287A CN200610023928A CN101025548A CN 101025548 A CN101025548 A CN 101025548A CN A2006100239287 A CNA2006100239287 A CN A2006100239287A CN 200610023928 A CN200610023928 A CN 200610023928A CN 101025548 A CN101025548 A CN 101025548A
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Abstract
The invention supplies a three lens reflecting type liquid board projector. The electric-photo adjusting unit includes three groups electric-photo adjusting device. The projecting optical unit includes three projecting lens. And three groups electric-photo adjusting device includes a polarizing prism and a reflecting silicon base liquid crystal board. The three polarizing prism sets on the light paths of red, green and blue separated by color light separating unit. The invention adopts three groups light adjusting device and three projecting lens that sharply improves brightness and contrast.
Description
Technical field
The present invention relates to a kind of projector, relate in particular to a kind of three-lens reflective liquic crystal display (LCOS) projector.
Background technology
Projector is widely used in education, commerce and the family.Common projector generally comprises a housing and is arranged on the interior photo engine of housing, circuit board, apparatus for lighting up, light source and corresponding cooling mechanism.According to what of camera lens used in the photo engine, projector can be divided into single-lens projector and tri-lens projector again.Generally all be that the white light that earlier a light source is produced is isolated red, green, blue three coloured light in design, by three liquid crystal light valves three coloured light are modulated respectively, three coloured light after the modulation are handled with diverse ways according to different mining single-lens or the three-lens design.In single-lens projector, be with closing that color component is synthesized and by the single lens projection imaging with three coloured light.In tri-lens projector, be that three coloured light are projected to imaging on the same screen via three different camera lenses respectively.Wherein single-lens projector has the advantages that volume is little, be convenient for carrying, but its back focal length is longer, and camera lens aperture requires to strengthen
And optical modules such as employed camera lens and spectroscope are very high to the requirement of quality, precision, cause cost higher.And tri-lens projector can project big picture in than short distance, and picture brightness and contrast all improve a lot than single-lens projector.
The structure difference of projector's basis optical system wherein can be divided into LCD (Liquid CrystalDisplay liquid crystal board) projector, CRT (Cathode Ray Tube cathode-ray tube (CRT)) projector, DLP (Digital Light Processor digital light transmission processor) projector and LCOS (reflective type silicon-based liquid crystal technology) projector again.
In reflection liquid crystal projector (LCOS projector), be that the switch control unit of transistor as the pixel liquid crystal is made on one deck silicon substrate, silicon substrate (also claiming reflection electrode layer) be positioned at liquid crystal layer below, be used for the various control electrodes of pixel address addressing and interelectrode insulation course be positioned at silicon substrate below, total is the three-dimensional arrangement mode of a 3D.Can not the penetrate through reflective electrode layer from the light of light source, but the electrode layer reflection that is reflected, various structural sheets the stopping below having avoided to light.Therefore, (the aperture ratio in the DLP technology is 88% to adopt the aperture ratio of the liquid crystal board of reflective type silicon-based liquid crystal technology can accomplish 93%, and the aperture ratio of the liquid crystal board of transmission type LCD is 40-60%), therefore, adopt the projector of reflective type silicon-based liquid crystal technology higher, can realize higher brightness output the utilization factor of light source.
Prior art adopts the optical projection system of reflective type silicon-based liquid crystal technology (LCOS), its principle of work is divided into two classes, in first kind reflective type silicon-based liquid crystal optical projection system, handle through the polarized light generating means by the directional light that illumination optics unit produces, penetrate the S polarized light of polarization direction unanimity; This S polarized light enters coloured light dissociated optical unit and is separated into red, green, blue three coloured light.Red, green, blue three coloured light carry out phase differential through the corresponding liquid crystal modulating device respectively to be regulated, and arrives color-combination prism.Synthesize by three coloured light (light modulated) of color-combination prism at last, generate the synthetic light of performance coloured image the liquid crystal light valve modulation.The synthetic light that is generated by color-combination prism is penetrated by the direction along projection lens, by projection lens the coloured image projection is presented on the screen.
Color-combination prism energy reflection red light and blue light in the LCD projecting system of above-mentioned prior art by green light, make three coloured light generate the synthetic light of performance coloured image.But color-combination prism has influenced the transmitance of light in the process of using, make general transmitance about 94%, influence drop shadow effect, and the difficulty of processing of color-combination prism is big, the cost height.Because it adopts same camera lens to three coloured light projections, because the plated film difficulty is big, transmitance and contrast are not high simultaneously.And, owing to use 1/2 wave plate, be easy to generate deformation, make the modulated beam of light generation brightness disproportionation phenomenon that penetrates from liquid crystal light valve, cause shown image the color spot problem to occur.And the problem that element is many, volume is big, display resolution is low arranged.
In the second class reflective type silicon-based liquid crystal technology optical projection system, the separation of three coloured light and synthesize in the Philips prism and finish.The core technology of optical projection system has only been formed in this three prisms combinations (TPA) jointly with one group of PBS.The parallel polarized light arrival PBS reflection of sending from illumination optics unit enters TPA, the film of TPA prism surface is used for separately red light and blue light, transmit green light, arrive reflective type silicon-based liquid crystal device (R-LCOS, G-LCOS, B-LCOS) separately respectively, by original optical path reflected back PBS, transmission is crossed PBS and is entered the projection lens imaging to display screen again after modulating.The LCD projecting system of this prior art is separated in same optical system TPA owing to three chromatic polarization light and is synthetic, therefore very high to the designing requirement of the film of the prism of forming TPA, be difficult to accomplish ideal effect, thereby cause serious light utilization efficiency to lose and reduced the fidelity and the contrast of Show Color.This type systematic also has other version, but all has the image defects that only adopt same projection lens and the shared same PBS of three coloured light to be brought.
Summary of the invention
Purpose of the present invention provides a kind of three-lens reflective liquic crystal display projector exactly in order to address the above problem.
The object of the present invention is achieved like this: a kind of three-lens reflective liquic crystal display projector, comprise housing and be arranged on the interior photo engine of housing, circuit board, apparatus for lighting up, light source, power supply and corresponding cooling mechanism, described photo engine comprises illumination optics unit, coloured light dissociated optical unit, electrooptical modulation unit and projecting optical unit, be characterized in, described electrooptical modulation unit comprises three groups of electro-optic modulation arrangement, described projecting optical unit comprises three projection lens, it is isolated red that three groups of electro-optic modulation arrangement are separately positioned on coloured light dissociated optical unit, green, on the blue three color light road, three projection lens are separately positioned on the emitting light path of three groups of electro-optic modulation arrangement; Described three groups of electro-optic modulation arrangement respectively comprise a polarizing prism and a reflective type silicon-based liquid crystal plate, three polarizing prisms are separately positioned on the isolated red, green, blue three coloured light roads, coloured light dissociated optical unit, three reflective type silicon-based liquid crystal plates are separately positioned on the back of three polarizing prisms, and respectively perpendicular to the incident direction of red, green, blue three coloured light, promptly three projection lens and three reflective type silicon-based liquid crystal plates are separately positioned on the both sides, front and back of three polarizing prisms.
Respectively be provided with a polaroid on the front end face of described three polarizing prisms.
Respectively be provided with a polaroid on the rear end face of described three polarizing prisms.
Described three projection lens are respectively at ruddiness, blue light and green glow plating anti-reflection film.
The transmitance index of described anti-reflection film is greater than 99.7%, more preferably greater than 99.85%.
Three-lens reflective liquic crystal display projector of the present invention has improved the display resolution and the utilization factor of light greatly, and has eliminated aberration owing to adopted three groups of electro-optic modulation arrangement and three projection lens, has improved the fidelity and the contrast of Show Color.
Description of drawings
Fig. 1 is the structural principle synoptic diagram of the photo engine in the three-lens reflective liquic crystal display projector of the present invention.
Embodiment
Three-lens reflective liquic crystal display projector of the present invention comprises housing and is arranged on the interior photo engine of housing, circuit board, apparatus for lighting up, light source, power supply and corresponding cooling mechanism.Photo engine wherein as shown in Figure 1, it comprises illumination optics unit 1, coloured light dissociated optical unit 2, electrooptical modulation unit 3 and projecting optical unit 4.Electrooptical modulation unit 3 wherein comprises three groups of electro-optic modulation arrangement 31,32,33, projecting optical unit 4 comprises three projection lens 41,42,43, three groups of electro-optic modulation arrangement 31,32,33 are separately positioned on the isolated red, green, blue three coloured light roads, coloured light dissociated optical unit, and three projection lens 41,42,43 are separately positioned on the emitting light path of three groups of electro-optic modulation arrangement.Wherein, three groups of electro-optic modulation arrangement (31,32,33) respectively comprise a polarizing prism (311,321,331) and a reflective type silicon-based liquid crystal plate (312,322,332), three polarizing prisms 311,321,331 to be separately positioned on coloured light dissociated optical unit isolated red, green, on the blue three color light road, three reflective type silicon-based liquid crystal plates 312,322,332 are separately positioned on the back of three polarizing prisms, and respectively perpendicular to red, green, the incident direction of blue three color light, i.e. three projection lens 41,42,43 and three reflective type silicon-based liquid crystal plates 312,322,332 are separately positioned on three polarizing prisms 311,321,331 both sides, front and back.
At ruddiness, blue light and green glow plating anti-reflection film, the transmitance index of this anti-reflection film is greater than 99.7%, more preferably greater than 99.85% respectively for three projection lens in the three-lens reflective liquic crystal display projector of the present invention.
Three-lens reflective liquic crystal display projector of the present invention can also respectively be provided with a polaroid on the front end face of three polarizing prisms, or a polaroid respectively is set on the rear end face of three colour splitting prisms.
Claims (5)
1, a kind of three-lens reflective liquic crystal display projector, comprise housing and be arranged on the interior photo engine of housing, circuit board, apparatus for lighting up, light source, power supply and corresponding cooling mechanism, described photo engine comprises illumination optics unit, coloured light dissociated optical unit, electrooptical modulation unit and projecting optical unit, it is characterized in that: described electrooptical modulation unit comprises three groups of electro-optic modulation arrangement, described projecting optical unit comprises three projection lens, it is isolated red that three groups of electro-optic modulation arrangement are separately positioned on coloured light dissociated optical unit, green, on the blue three color light road, three projection lens are separately positioned on the emitting light path of three groups of electro-optic modulation arrangement; Described three groups of electro-optic modulation arrangement respectively comprise a polarizing prism and a reflective type silicon-based liquid crystal plate, three polarizing prisms are separately positioned on the isolated red, green, blue three coloured light roads, coloured light dissociated optical unit, three reflective type silicon-based liquid crystal plates are separately positioned on the back of three polarizing prisms, and respectively perpendicular to the incident direction of red, green, blue three coloured light, promptly three projection lens and three reflective type silicon-based liquid crystal plates are separately positioned on the both sides, front and back of three polarizing prisms.
2, three-lens reflective liquic crystal display projector according to claim 1 is characterized in that: respectively be provided with a polaroid on the front end face of described three polarizing prisms.
3, three-lens reflective liquic crystal display projector according to claim 1 is characterized in that: respectively be provided with a polaroid on the rear end face of described three polarizing prisms.
4, three-lens full-digital reflective projector according to claim 1 is characterized in that: described three projection lens are respectively at ruddiness, blue light and green glow plating anti-reflection film.
5, three-lens full-digital reflective projector according to claim 3 is characterized in that: the transmitance index of described anti-reflection film is greater than 99.7%, more preferably greater than 99.85%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006100239287A CN101025548A (en) | 2006-02-17 | 2006-02-17 | Three-lens reflective liquic crystal display projector |
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2006100239287A CN101025548A (en) | 2006-02-17 | 2006-02-17 | Three-lens reflective liquic crystal display projector |
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| CN101025548A true CN101025548A (en) | 2007-08-29 |
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| CNA2006100239287A Pending CN101025548A (en) | 2006-02-17 | 2006-02-17 | Three-lens reflective liquic crystal display projector |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106200102A (en) * | 2016-09-09 | 2016-12-07 | 京东方科技集团股份有限公司 | Panel construction and preparation method thereof, optical projection system |
| CN107664781A (en) * | 2017-08-30 | 2018-02-06 | 中国科学院上海技术物理研究所 | A kind of controllable polarization-maintaining color separation film of face shape based on ion beam sputter depositing film |
| CN115343195A (en) * | 2022-10-20 | 2022-11-15 | 长春理工大学 | Device and method for reflection type indoor simulation measurement of atmospheric smoke Mueller matrix characteristics |
-
2006
- 2006-02-17 CN CNA2006100239287A patent/CN101025548A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106200102A (en) * | 2016-09-09 | 2016-12-07 | 京东方科技集团股份有限公司 | Panel construction and preparation method thereof, optical projection system |
| CN106200102B (en) * | 2016-09-09 | 2018-04-10 | 京东方科技集团股份有限公司 | Panel construction and preparation method thereof, optical projection system |
| US10416491B2 (en) | 2016-09-09 | 2019-09-17 | Boe Technology Group Co., Ltd. | Panel structure, its manufacturing method, and projection system |
| CN107664781A (en) * | 2017-08-30 | 2018-02-06 | 中国科学院上海技术物理研究所 | A kind of controllable polarization-maintaining color separation film of face shape based on ion beam sputter depositing film |
| CN115343195A (en) * | 2022-10-20 | 2022-11-15 | 长春理工大学 | Device and method for reflection type indoor simulation measurement of atmospheric smoke Mueller matrix characteristics |
| CN115343195B (en) * | 2022-10-20 | 2023-01-31 | 长春理工大学 | Device and method for reflection type indoor simulation measurement of atmospheric smoke Mueller matrix characteristics |
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