CN101035229A - Three-lens full digital reflection back projection TV - Google Patents
Three-lens full digital reflection back projection TV Download PDFInfo
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- CN101035229A CN101035229A CN 200610024430 CN200610024430A CN101035229A CN 101035229 A CN101035229 A CN 101035229A CN 200610024430 CN200610024430 CN 200610024430 CN 200610024430 A CN200610024430 A CN 200610024430A CN 101035229 A CN101035229 A CN 101035229A
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Abstract
The invention relates to a three-lens all-digital reflecting back protection TV set, comprising case, screen, projector, small reflector and big reflector, where the screen is arranged on the obverse side of the case; the projector, the small reflector and the big reflector are arranged in the case, the small reflector is tiltedly arranged below the screen, the big reflector is tiltedly arranged at the top, and the light signal emitted by the projector is projected to the small reflector and the reflected through the big reflector onto the screen, and it is characterized in that: the projector is a three-lens all-digital reflecting projector. As compared with the existing techniques, the kernel part of the invention is an originally designed three-lens all-digital reflecting (LCOS) projector, therefore all the brightness, contrast, and resolution as well as image quality are obviously improved in comparison with common back projection TV sets.
Description
Technical field
The present invention relates to television set, relate in particular to a kind of three-lens full-digital reflective (LCOS) rear-projection TV.
Background technology
Traditional liquid crystal rear-projection TV, comprise transmission-type liquid crystal rear-projection TV (being the LCD rear-projection TV) and reflection type liquid crystal rear-projection TV (being the LCOS rear-projection TV), generally comprise lamp optical system, coloured light split-optics, first to the 3rd electro-optical device (its center part is the composite set of liquid crystal light valve and polarizer, and liquid crystal light valve comprises transmission-type liquid crystal light valve LCD or reflective liquid crystal light valve LCOS device), coloured light synthesizer, projector optical apparatus and screen.In the liquid crystal rear-projection TV, first to the 3rd electro-optical device is respectively successively by first to the 3rd coloured light, generally speaking, first to the 3rd coloured light is respectively red, green, blue or indigo plant, green, red trichromatism light, wherein the first and the 3rd coloured light penetrates and projects on the screen by projecting optical device from the coloured light synthesizer with the S polarization state, and second coloured light penetrates and projects on the screen by projecting optical device from the coloured light synthesizer with the P polarization state.
From a structural point, existing rear-projection TV comprises that casing, screen, projector (comprise the projection-type liquid crystal projector, reflecting liquid crystal projector and DLP projector), small reflector, large reflective mirror, screen is located at the front of casing, projector, small reflector, large reflective mirror are located in the casing, wherein, small reflector tiltedly is located at the screen below, and large reflective mirror tiltedly is located at the top; From operation principle, the light signal that projector sends is delivered directly to small reflector, and projects on the screen after the reflection by large reflective mirror.
In reflecting 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 insulating barrier 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 structure sheafs 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 utilance of light source.
Prior art adopts the optical projection system of reflective type silicon-based liquid crystal technology (LCOS), its operation principle is divided into two classes, in first kind reflective type silicon-based liquid crystal optical projection system, handle through the polarised light generating means by the directional light that illumination optics unit produces, penetrate the S polarised light of polarization direction unanimity; This S polarised 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 difference 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 SC.
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 separates 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 is exactly that a kind of brightness and contrast height, three-lens full digital reflection back projection TV that picture quality is good are provided in order to overcome the defective that above-mentioned prior art exists.
Purpose of the present invention can be achieved through the following technical solutions: three-lens full digital reflection back projection TV, comprise casing, screen, projector, small reflector, large reflective mirror, described screen is located at the front of casing, described projector, small reflector, large reflective mirror is located in the casing, wherein, small reflector tiltedly is located at the screen below, large reflective mirror tiltedly is located at the top, the light signal that described projector sends is projected to small reflector, project on the screen after the large reflective mirror reflection, it is characterized in that: described projector is a three-lens full-digital reflective projector again.
Described three-lens full-digital reflective projector 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, described photo engine comprises illumination optics unit, coloured light dissociated optical unit, electrooptic modulation unit and projecting optical unit, described electrooptic 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 devating prism and a reflective type silicon-based liquid crystal plate, three devating 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 devating 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 devating prisms.
Described housing can replace with a base plate, and projector's parts all are arranged on this base plate.
Respectively be provided with a polarizer on the front end face of described three devating prisms.
Respectively be provided with a polarizer on the rear end face of described three devating prisms.
Described three projection lens are respectively at ruddiness, blue streak 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%.
Described three-lens full-digital reflective projector is located at bottom of shell.
Compared with prior art, the core component of rear-projection TV of the present invention adopts three-lens full-digital reflective (LCOS) projector of brand-new design, so its brightness, contrast, resolution and picture quality all are significantly improved than common rear-projection TV.
Description of drawings
Fig. 1 is the structural representation of rear-projection TV of the present invention;
Fig. 2 is the structural representation of the three-lens full-digital reflective projector of rear-projection TV of the present invention.
Embodiment
The invention will be further described below in conjunction with drawings and the specific embodiments.
Embodiment
As shown in Figure 1, three-lens full digital reflection back projection TV, comprise casing 1, screen 2, three-lens full-digital reflective projector 3, small reflector 4, large reflective mirror 5, described screen 2 is located at the front of casing 1, described three-lens full-digital reflective projector 3, small reflector 4, large reflective mirror 5 are located in the casing 1, wherein, small reflector 4 tiltedly is located at screen 2 belows, large reflective mirror 5 tiltedly is located at the top, the light signal that described three-lens full-digital reflective projector 3 sends is projected to small reflector 4, projects on the screen 2 after large reflective mirror 5 reflections again.
Present embodiment three-lens opaque projector comprises housing and is arranged on housing interior photo engine, circuit board, apparatus for lighting up and power supply, light source and corresponding cooling mechanism.Photo engine wherein as shown in Figure 2, it comprises illumination optics unit 1, coloured light dissociated optical unit 2, electrooptic modulation unit 3 and projecting optical unit 4.Electrooptic modulation unit 3 wherein comprises three groups of electro-optic modulation arrangement 31,32,33, projecting optical unit 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 devating prism 311,321,331 and reflective type silicon-based liquid crystal plates 312,322,332, three devating 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 devating 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 devating prisms 311,321,331 both sides, front and back.
At ruddiness, blue streak 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 present embodiment.
The three-lens reflective liquic crystal display projector of present embodiment can also respectively be provided with a polarizer on the front end face of three devating prisms, or a polarizer respectively is set on the rear end face of three colour splitting prisms.
Claims (8)
1. three-lens full digital reflection back projection TV, comprise casing, screen, projector, small reflector, large reflective mirror, described screen is located at the front of casing, described projector, small reflector, large reflective mirror are located in the casing, wherein, small reflector tiltedly is located at the screen below, large reflective mirror tiltedly is located at the top, the light signal that described projector sends is projected to small reflector, project on the screen after the large reflective mirror reflection, it is characterized in that: described projector is a three-lens full-digital reflective projector again.
2. three-lens full digital reflection back projection TV according to claim 1, it is characterized in that: described three-lens full-digital reflective projector 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, described photo engine comprises illumination optics unit, coloured light dissociated optical unit, electrooptic modulation unit and projecting optical unit, described electrooptic 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 devating prism and a reflective type silicon-based liquid crystal plate, three devating 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 devating 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 devating prisms.
3. three-lens full digital reflection back projection TV according to claim 2 is characterized in that: described housing can replace with a base plate, and projector's parts all are arranged on this base plate.
4. three-lens full digital reflection back projection TV according to claim 2 is characterized in that: respectively be provided with a polarizer on the front end face of described three devating prisms.
5. three-lens full digital reflection back projection TV according to claim 2 is characterized in that: respectively be provided with a polarizer on the rear end face of described three devating prisms.
6. three-lens full digital reflection back projection TV according to claim 2 is characterized in that: described three projection lens are respectively at ruddiness, blue streak and green glow plating anti-reflection film.
7. three-lens full digital reflection back projection TV according to claim 6 is characterized in that: the transmitance index of described anti-reflection film is greater than 99.7%, more preferably greater than 99.85%.
8. three-lens full digital reflection back projection TV according to claim 1 is characterized in that: described three-lens full-digital reflective projector is located at bottom of shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610024430 CN101035229A (en) | 2006-03-07 | 2006-03-07 | Three-lens full digital reflection back projection TV |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610024430 CN101035229A (en) | 2006-03-07 | 2006-03-07 | Three-lens full digital reflection back projection TV |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101035229A true CN101035229A (en) | 2007-09-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610024430 Pending CN101035229A (en) | 2006-03-07 | 2006-03-07 | Three-lens full digital reflection back projection TV |
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|---|---|
| CN (1) | CN101035229A (en) |
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2006
- 2006-03-07 CN CN 200610024430 patent/CN101035229A/en active Pending
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