CN2890998Y - Improved three-lens DLP projector - Google Patents
Improved three-lens DLP projector Download PDFInfo
- Publication number
- CN2890998Y CN2890998Y CNU2006200395327U CN200620039532U CN2890998Y CN 2890998 Y CN2890998 Y CN 2890998Y CN U2006200395327 U CNU2006200395327 U CN U2006200395327U CN 200620039532 U CN200620039532 U CN 200620039532U CN 2890998 Y CN2890998 Y CN 2890998Y
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- lens
- electro
- total reflection
- digital
- optic modulation
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Abstract
The utility model provides a modified three-lens full digital reflex projector, and is characterized in that the electro-optic modulation unit comprises three sets of electro-optic modulation devices and the projection optics unit comprises three projection lenses. Wherein, three sets of electro-optic modulation devices consist of a total reflection prism and a digital micro-reflector, three total reflection prisms are installed separately on the tricolor light path of red, green, blue isolated from color light reparative optical element, three projection lens and digital micro-reflectors are separately equipped on the front and back sides of the three total reflection prisms. As the modified three-lens full digital reflex projector employ three sets of electro-optic modulation devices and three projection lens, the utility model greatly improves the brightness and contrast.
Description
Technical field
The utility model relates to a kind of projector, relates in particular to a kind of modified three-lens full-digital reflective (DLP) 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 (the digital optical processor of Digital Light Processor) projector and LCOS (reflective type silicon-based liquid crystal technology) projector again.
The technology of DLP (digital light transmission processor) projector is an a kind of full-digital reflective shadow casting technique.Its characteristics at first are digital advantages.The employing of digital technology improves the gradation of image grade, and picture noise disappears, and image quality is stable, and digital picture is very accurate.Next is the reflection advantage.The application of reflective digital micro-reflector (DMD) device improves total optical efficiency of image device greatly, and contrast, brightness, homogeneity are all very outstanding.Although the DLP technology has above-mentioned advantage, but in the single-lens projector of this technology of employing, still exist because the contrast of the transmitance lower (brightness is low) of the light that the difficult raising of employing color-combination prism and single-lens plated film index is produced, generation image is lower, influence drop shadow effect.
Summary of the invention
The purpose of this utility model provides a kind of modified three-lens full-digital reflective projector exactly in order to address the above problem.
The purpose of this utility model is achieved in that a kind of modified three-lens full-digital reflective 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, 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 total reflection prism and a digital micro-reflector, three total reflection prisms are separately positioned on the isolated red, green, blue three coloured light roads, coloured light dissociated optical unit, three digital micro-reflectors are separately positioned on the back of three total reflection prisms, and respectively perpendicular to the incident direction of red, green, blue three coloured light, promptly three projection lens and three digital micro-reflectors are separately positioned on the both sides, front and back of three total reflection prisms.
Described three total reflection prisms can replace with catoptron.
Described three projection lens are respectively at ruddiness, blue light and green glow plating anti-reflection film.
The utility model modified three-lens full-digital reflective projector is owing to adopted three groups of electro-optic modulation arrangement and three projection lens, in electro-optic modulation arrangement, adopted total reflection prism and digital micro-reflector, picture contrast, brightness have all been improved greatly.
Description of drawings
Fig. 1 is the structural principle synoptic diagram of the photo engine in a kind of modified three-lens full-digital reflective projector of the utility model.
Embodiment
A kind of modified three-lens full-digital reflective projector of the present utility model 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 total reflection prism (311,321,331) and a digital micro-reflector (312,322,332), three total reflection 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 digital micro-reflectors 312,322,332 are separately positioned on the back of three total reflection 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 digital micro-reflectors 312,322,332 are separately positioned on three total reflection prisms 311,321,331 both sides, front and back.
Three total reflection prisms in the modified three-lens full-digital reflective projector of the present utility model also can replace with catoptron.
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 camera lenses in the modified three-lens full-digital reflective projector of the present utility model.
Claims (3)
1, a kind of modified three-lens full-digital reflective 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 total reflection prism and a digital micro-reflector, three total reflection prisms are separately positioned on the isolated red, green, blue three coloured light roads, coloured light dissociated optical unit, three digital micro-reflectors are separately positioned on the back of three total reflection prisms, and respectively perpendicular to the incident direction of red, green, blue three coloured light, promptly three projection lens and three digital micro-reflectors are separately positioned on the both sides, front and back of three total reflection prisms.
2, modified three-lens full-digital reflective projector according to claim 1 is characterized in that: described three total reflection prisms can replace with catoptron.
3, modified 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200395327U CN2890998Y (en) | 2006-02-17 | 2006-02-17 | Improved three-lens DLP projector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200395327U CN2890998Y (en) | 2006-02-17 | 2006-02-17 | Improved three-lens DLP projector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2890998Y true CN2890998Y (en) | 2007-04-18 |
Family
ID=38021664
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2006200395327U Expired - Fee Related CN2890998Y (en) | 2006-02-17 | 2006-02-17 | Improved three-lens DLP projector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2890998Y (en) |
-
2006
- 2006-02-17 CN CNU2006200395327U patent/CN2890998Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |