CN102692717A - Optical engine employing polarization reflector - Google Patents
Optical engine employing polarization reflector Download PDFInfo
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- CN102692717A CN102692717A CN2011100700611A CN201110070061A CN102692717A CN 102692717 A CN102692717 A CN 102692717A CN 2011100700611 A CN2011100700611 A CN 2011100700611A CN 201110070061 A CN201110070061 A CN 201110070061A CN 102692717 A CN102692717 A CN 102692717A
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- light
- light source
- green
- polarizing mirror
- polarized light
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Abstract
The invention provides an optical engine employing a polarization reflector comprising a green light source, a red light source, a blue light source, a green light polarization reflector, a RGB color module, a uniform light converging module, and a polarized light image projection module. The optics engine employs the green light polarization reflector to replace a normal green light reflector, changes the green light propagation direction, simultaneously, can also filter the polarized light in ineffective polarization state from the green light effectively without reducing the brightness of the blue light and the red light in the optical path, and improves the efficiency of the blue light source and the red light source effectively.
Description
Technical field
The present invention relates to a kind of light engine, relate in particular to a kind of light engine that adopts polarizing mirror.
Background technology
In the light engine of the projector apparatus that adopts polarized light to form images, the light engine structure that adopts usually is as shown in fig. 1: the structure of whole laser engine comprises that green-light source S10, red-light source S20, blue light source S30, green glow polarizing mirror A10, RGB close look modules A 20, even light convergence module A30, polaroid A 40, polarized light imaging projection module A50 formation.
In the green laser light source that adopts the crystal pumping, can produce a certain proportion of P polarized light and S polarized light.For the projector that adopts LCOS (liquid crystal on silicon) with the LCD panel; The degree of polarization of illumination beam requires than higher; Panel imaging is used has only wherein a kind of of P polarized light and S polarized light, if there is the polarized light of invalid polarization state in the light path, understands the contrast that directly influence picture.The main effect of polaroid A 40 is the polarized lights that filter the invalid polarization state of green glow and the generation of other light source among Fig. 1.But usually polaroid is lower to the mean transmissivity of visible light, can reduce the transmitance of blue light and ruddiness in the light path, makes its brightness reduction.
For addressing the above problem, the present invention aims to provide a kind of new light engine, can filter the polarized light of polarization state invalid in the green glow, does not reduce the efficient of blue light and red-light source simultaneously, satisfies demands of applications.
Summary of the invention
The object of the invention provides a kind of light engine that adopts polarizing mirror; Adopt the green glow polarizing mirror to replace conventional green glow catoptron; Can filter out the polarized light of polarization state invalid in the green glow effectively, again the efficient that does not reduce blue light and red-light source can be arranged simultaneously.
Adopt the light engine of polarizing mirror, close look module, even light convergence module, polarized light imaging projection module by green-light source, red-light source, blue light source, green glow polarizing mirror, RGB and constitute.
Green-light source is used to be provided as the required green illumination light source of picture;
Red-light source is used to be provided as the required red illumination light source of picture;
Blue light source is used to be provided as the required blue illumination light source of picture;
The green glow polarizing mirror adopts the green glow catoptron and plates polarizing coating, is 45 and places, and realizes the polarized light of filtration of invalid polarization state, is mainly used in the polarized light that 90 ° of reflect green light light paths filter out polarization state invalid in the green laser light source simultaneously;
RGB closes the look module, is used for ruddiness, green glow, blue light three-color light source are incorporated into same light path;
Even light convergence module is used for pointolite is expanded to uniform face illumination beam and converges to imaging panel;
Polarized light imaging projection module is used for the linearly polarized light of even light convergence module outgoing is modulated into picture and projects picture.
The green-light source of infrared diode+crystal pumping configuration; Usually have a certain proportion of S polarized light and P polarized light; After the green glow polarizing mirror filters out the polarized light of polarization state invalid in the green glow; Close the look module and other light source is incorporated in the same light path through RGB, through even light convergence module pointolite is expanded to uniform face illumination beam again and converge to polarized light imaging projection module, after polarized light imaging projection module is modulated into picture, project picture.
The light engine of employing polarizing mirror provided by the present invention removes the polaroid parts in the conventional use in the light path, can eliminate the influence that efficient that polaroid brings for other its light sources reduces.
Description of drawings
Fig. 1 conventional laser projector optics engine structure figure;
The light engine structural drawing of Fig. 2 employing polarizing mirror provided by the invention;
Fig. 3 green glow polarizing mirror provided by the invention synoptic diagram.
Specific embodiments
Below in conjunction with each accompanying drawing the summary of the invention that the present invention proposes is carried out detailed description.
Fig. 1 is the structural drawing of conventional laser projector optics automotive engine system, and Fig. 2 is the light engine structural drawing of employing polarizing mirror structure provided by the present invention.
In application, the green-light source that the crystal pumping produces is made up of a certain proportion of P polarized light and S polarized light.Polarized light imaging projection module participates in being modulated into the polarized light that has only a kind of polarization state of picture, has the polarized light of invalid another kind of polarization state in the light path, can directly reduce the contrast of picture.Light engine among Fig. 2 adopts the green glow polarizing mirror of polarization plated film to realize filtering the polarized light of polarization state invalid in the green light source.
Fig. 3 (a) is the synoptic diagram of green glow polarizing mirror, and shown in figure, the green glow polarizing mirror is 45 to be placed, and is used for the polarized light of the polarization state of filtration of invalid.
Fig. 2 is the light engine structural drawing of employing polarizing mirror structure provided by the present invention; After the green-light source (S10) that contains S polarization and two kinds of polarization states of P polarization simultaneously incides green glow polarizing mirror (B20); The polarized light transmission of invalid polarization state is gone out; Effectively the polarized light of polarization state closes look module (A20), passes through even light convergence module (A30) through RGB again; Pointolite is expanded to uniform face illumination beam and converges to polarized light imaging projection module (A50), after polarized light imaging projection module is modulated into picture, project picture.
Fig. 3 (b) and Fig. 3 (c) invent Application Expansion for this reason, the polarized light of transmitted light as effective polarization state, filter out the polarized light of invalid polarization state with the mode that reflects away.
The light engine of the conventional use shown in Fig. 1 of comparing, the present invention adopts the green glow polarizing mirror to replace the green glow catoptron, and the polarized light to invalid polarization state filters from the light source source.Saved the polaroid in the conventional light path (B40) parts, eliminated the influence of polaroid light path Smalt light source and red light source efficient.Use thereby reach both to satisfy, improve the demand of source efficiency in the light path again.
Claims (3)
1. adopt the light engine of polarizing mirror; Close look module, even light convergence module, polarized light imaging projection module by green-light source, red-light source, blue light source, green glow polarizing mirror, RGB and constitute, it is characterized in that said green glow polarizing mirror realizes filtering the polarized light of polarization state invalid in the green glow.
2. the light engine of employing polarizing mirror according to claim 1 is characterized in that said green glow polarizing mirror has the polarization plated film.
3. the light engine of employing polarizing mirror according to claim 1 is characterized in that the green-light source of said light engine is applicable to the green laser light source that obtains through the crystal pumping.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100700611A CN102692717A (en) | 2011-03-23 | 2011-03-23 | Optical engine employing polarization reflector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100700611A CN102692717A (en) | 2011-03-23 | 2011-03-23 | Optical engine employing polarization reflector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102692717A true CN102692717A (en) | 2012-09-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN2011100700611A Pending CN102692717A (en) | 2011-03-23 | 2011-03-23 | Optical engine employing polarization reflector |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002296590A (en) * | 2001-03-30 | 2002-10-09 | Toshiba Corp | Liquid crystal display device |
| CN201289541Y (en) * | 2008-06-07 | 2009-08-12 | 王勇竞 | System for generating synthesis image |
| CN201293902Y (en) * | 2008-11-19 | 2009-08-19 | 中国科学院上海光学精密机械研究所 | Far-field monitoring device for four-time amplifying system |
| CN101825829A (en) * | 2009-03-06 | 2010-09-08 | 上海三鑫科技发展有限公司 | Optical engine for micro projector |
| CN101825830A (en) * | 2009-03-06 | 2010-09-08 | 上海三鑫科技发展有限公司 | Reflection-type optical engine |
| CN201584643U (en) * | 2009-12-14 | 2010-09-15 | 深圳市大族激光科技股份有限公司 | Laser anti-reflection device |
-
2011
- 2011-03-23 CN CN2011100700611A patent/CN102692717A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002296590A (en) * | 2001-03-30 | 2002-10-09 | Toshiba Corp | Liquid crystal display device |
| CN201289541Y (en) * | 2008-06-07 | 2009-08-12 | 王勇竞 | System for generating synthesis image |
| CN201293902Y (en) * | 2008-11-19 | 2009-08-19 | 中国科学院上海光学精密机械研究所 | Far-field monitoring device for four-time amplifying system |
| CN101825829A (en) * | 2009-03-06 | 2010-09-08 | 上海三鑫科技发展有限公司 | Optical engine for micro projector |
| CN101825830A (en) * | 2009-03-06 | 2010-09-08 | 上海三鑫科技发展有限公司 | Reflection-type optical engine |
| CN201584643U (en) * | 2009-12-14 | 2010-09-15 | 深圳市大族激光科技股份有限公司 | Laser anti-reflection device |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120926 |