CN102402016A - Silica-based liquid crystal stereo projection light machine - Google Patents
Silica-based liquid crystal stereo projection light machine Download PDFInfo
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- CN102402016A CN102402016A CN201110351528XA CN201110351528A CN102402016A CN 102402016 A CN102402016 A CN 102402016A CN 201110351528X A CN201110351528X A CN 201110351528XA CN 201110351528 A CN201110351528 A CN 201110351528A CN 102402016 A CN102402016 A CN 102402016A
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Abstract
The invention provides a silica-based liquid crystal stereo projection light machine which can realize colorful three-dimensional stereo display. An engine mainly comprises a lighting source, two polarization light splitting devices, two reflection-type silica-based liquid crystal micro display chips, a projection objective lens and the like. The light machine provided by the invention adopts the two polarization light splitting devices so as to allow imaging light incident on the reflection-type silica-based liquid crystal micro display chips and imaging light reflected from the reflection-type silica-based liquid crystal micro display chips to pass through a polarization light splitting film of a polarization light splitting lens twice, and one time is transmission, and the other time is reflection, therefore, the extinction ratio of the work light is greatly improved, moreover, the extinction ratios of two emergent polarized light beams are completely equal, so that the contrast ratio of an injection image is effectively improved, and the image quality is improved. More importantly, compared with the existing stereo projection device adopting four polarization light splitting devices, the silica-based liquid crystal stereo projection light machine adopting the two polarization light splitting devices obviously reduces the manufacture cost and the technology difficulty, thereby being beneficial to the large scale production. The silica-based liquid crystal stereo projection light machine can realize the switchover of the three-dimensional image display and the two-dimension image display.
Description
Technical field
The present invention relates to liquid crystal on silicon projection ray machine, particularly a kind of liquid crystal on silicon stereoprojection ray machine.
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Background technology
Stereo projection display receives extensively pursuing of people because of it can produce visual experience on the spot in person.The technology that realizes stereo projection display has many kinds, is not suitable for the many average family uses of people by means of the active stereo projection technology of liquid crystal shutter glasses because the liquid crystal shutter glasses cost is high.By means of two ray machine stereo projection technologies of polaroid glasses, its polaroid glasses cost is low, can many people watch simultaneously, but but huge because of machine volume, and production cost is high and only be applicable to vast cinema.Therefore, research is sought to be fit to many people and is watched simultaneously based on the monochromatic light machine stereo projection display technology of polarization technology, convenient moving, and the stereo projection display technology that price is low is very necessary.
Liquid crystal on silicon---LCoS (Liquid Crystal on Silicon) micro display chip belongs to reflective LCD (Liquid Crystal Display); Therefore the same with LCD; The LCoS micro display chip only produces modulating action to polarized light, and the emergent light after modulated also is a polarized light.The LCoS projected light facility that are made up of LCoS micro display chip and light splitting device have optical efficiency height, good resolution, contrast is high, cost is low, volume is little and advantage such as easy large-scale production; But this LCoS projection ray machine can only projection common plane image, does not possess the function of project stereoscopic picture.
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Summary of the invention
Technical matters:The object of the present invention is to provide a kind of liquid crystal on silicon stereoprojection ray machine, it can realize the stereo display of coloured image, has characteristics such as simple in structure, that contrast is high, light utilization efficiency is high, cost is low.
Further aim of the present invention is to provide a kind of ray machine that can between demonstration of 3 D stereo colour projection and the demonstration of planar colour projection, switch mutually.
Technical scheme:Liquid crystal on silicon stereoprojection ray machine of the present invention comprises that light source, first light splitting device, second light splitting device, the first liquid crystal on silicon micro display chip, the second liquid crystal on silicon micro display chip, half-wave plate, surface post second catoptron, projection objective that quarter-wave plate is posted on first catoptron, the surface of quarter-wave plate.Wherein,
The center light axis of light source, first light splitting device, half-wave plate, second light splitting device, projection objective is set in sequence on same the center light axis; Be that half-wave plate is arranged between first light splitting device, second light splitting device; Light source is positioned at the plane of incidence place of first light splitting device, and projection objective is positioned at the exit facet place of second light splitting device; The first liquid crystal on silicon micro display chip, first catoptron be positioned at center light axis described in first light splitting device both sides and parallel relatively; The second liquid crystal on silicon micro display chip and second catoptron be positioned at center light axis described in second light splitting device both sides and parallel relatively; The first liquid crystal on silicon micro display chip and second catoptron are positioned at the same side, and first catoptron and the second liquid crystal on silicon micro display chip are positioned at the another side.
The said first liquid crystal on silicon micro display chip, the second liquid crystal on silicon micro display chip are colorized optical filtering type liquid crystal on silicon micro display chips.
Said first light splitting device is piled up parallel placement with second light splitting device, and first polarization beam splitter is parallel with second polarization beam splitter.
Quarter-wave plate is posted on the surface of first catoptron and second catoptron.
The said first liquid crystal on silicon micro display chip lays respectively at parallel two the relative sides of said first light splitting device with first catoptron that quarter-wave plate is posted on the surface, and surperficial first catoptron that posts quarter-wave plate can at first receive from the light source light of first polarization beam splitter reflection.
The first liquid crystal on silicon micro display chip, the second liquid crystal on silicon micro display chip are the identical colorized optical filtering type liquid crystal on silicon micro display chips of primary colours.
Said stereoprojection ray machine also comprises position adjusting mechanism; Be used for when said ray machine is used for the common plane Projection Display, the position of finely tuning the said first liquid crystal on silicon micro display chip, the second liquid crystal on silicon micro display chip is so that the image space of the respective pixel of said micro display chip overlaps.
Said light source is white monochromatic source or the light source for being made up of red, green, blue three-color LED chipset.
Said light source is a LASER Light Source, and said LASER Light Source is white monochromatic source or the light source for being made up of red, green, blue three look laser lamps.
Said first light splitting device, second light splitting device are wire grid polarization light splitting piece or polarization splitting prism.
When the input image information of said two micro display chips was distinguished corresponding right and left eyes visual angle, the LCoS stereoprojection ray machine of the invention described above can be realized the color solid Projection Display; When the input image information of said two micro display chips is identical, can realize that then two dimensional surface colour projection shows.
In the liquid crystal on silicon stereoprojection ray machine of the present invention; The arrangement position that catoptron, light splitting device and the half-wave plate of quarter-wave plate are posted in two LCoS micro display chips, two surfaces must guarantee to incide on the LCoS micro display chip and pass through polarization beam splitter twice respectively from the imaging light of LCoS micro display chip reflection, and once once is transmission for reflection.With the S linearly polarized light that guarantees final outgoing and the contrast balance of P linearly polarized light image.
In the liquid crystal on silicon stereoprojection ray machine of the present invention, stick the contrast that quarter-wave plate can also further improve image on the surface of LCoS micro display chip, improve picture element.
Beneficial effect:The present invention has following beneficial effect: compare with background technology, the present invention mainly adopts two LCoS micro display chips and two light splitting device to realize the Color Stereoscopic Display of image.Mechanical-optical setup is simple, cost is low, good image quality.And can between color three dimension stereo display pattern and two dimensional surface display mode, freely switch easily.
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Description of drawings
Fig. 1 is the synoptic diagram of one embodiment of the present of invention.
Fig. 2 is an alternative embodiment of the invention synoptic diagram.
Have among the figure: light source 1, first light splitting device 2, first polarization beam splitter 22, first catoptron 3, the first liquid crystal on silicon micro display chip 4, half-wave plate 5, second light splitting device 6, second polarization beam splitter 23, the second liquid crystal on silicon micro display chip 7, second catoptron 8, projection objective 9, first quarter-wave plate 10, second quarter-wave plate 11.
The three-way S polarized light of first path, the first line S polarized light 13, first path, the second line P polarized light 19, first path 20, first path the 4th line P polarized light 21; The three-way P polarized light of second path, the first line P polarized light 14, second path, the second line S polarized light 15, second path 16, second path the 4th line S polarized light 17, imaging beam 19.
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Embodiment
Set forth the present invention in detail below in conjunction with accompanying drawing, do not limit content of the present invention but describe.
Fig. 1 is an embodiment of liquid crystal on silicon stereoprojection ray machine of the present invention.
The center light axis of light source 1, first light splitting device 2, half-wave plate 5, second light splitting device 6, projection objective 9 is set in sequence on same the center light axis; Be that half-wave plate 5 is arranged between first light splitting device 2, second light splitting device 6; Light source 1 is positioned at the plane of incidence place of first light splitting device 2, and projection objective 9 is positioned at the exit facet place of second light splitting device 6; The first liquid crystal on silicon micro display chip 4, first catoptron 3 be positioned at center light axis described in first light splitting device 2 both sides and parallel relatively; The second liquid crystal on silicon micro display chip 7 and second catoptron 8 be positioned at center light axis described in second light splitting device 6 both sides and parallel relatively; The first liquid crystal on silicon micro display chip 4 and second catoptron 8 are positioned at the same side, and first catoptron 3 and the second liquid crystal on silicon micro display chip 7 are positioned at the another side.
Light source is a led light source, can or be the light source of being made up of red, blue, green three-color LED chipset for white monochromatic source.The first liquid crystal on silicon micro display chip 4 and the second liquid crystal on silicon micro display chip 7 can be the colored micro display chips of the silicon base liquid crystal reflective that has miniature color separation filter described in Chinese patent No.01113471.2 and the No.02217356.0.Two light splitting device promptly first light splitting device 2 and second light splitting device 6 to pile up parallel placement and two polarization beam splitters be that first polarization beam splitter 22, second polarization beam splitter 23 are parallel.Half-wave plate 5 is positioned at the faying face place of two light splitting device.First catoptron 3 and a LCoS micro display chip 4 that quarter-wave plate is posted on the surface lay respectively at the two sides adjacent with the exiting surface of first light splitting device 2, and catoptron 3 can at first receive the light from light source of light splitting device 2 reflections.Second catoptron 8 and the 2nd LCoS micro display chip 7 that quarter-wave plate is posted on the surface lay respectively at the two sides adjacent with the exiting surface of second light splitting device 6, and the first liquid crystal on silicon micro display chip 4 and the second liquid crystal on silicon micro display chip 7 lay respectively at the both sides of light-dividing device.Can import stereo image information respectively corresponding to the right and left eyes visual angle.
When the illumination light 12 from light source incides 2 last times of light splitting device, reflection and transmission take place in light at polarization beam splitter 22 places,
And be divided into two paths (dotted line and implementation part among the figure)Be reflected
First path, the first line S linearly polarized light 13Incide on first catoptron 3, behind the direction half-twist from first catoptron, 3 reflected backs, first light splitting device 2, thereby transmission is crossed polarization beam splitter and is incided on the LCoS micro display chip 4.Incide on the LCoS micro display chip 4
First path, the second line P polarized light 19After modulated, the linearly polarized light that is partly with color image information is reflected and the polarization direction half-twist incides on the light splitting device 2 once more, thereby is reflected light-dividing device by polarization beam splitter.
The three-way S polarized light 20 in first pathAfter light splitting device 2 outgoing through half-wave plate 5 directions once more half-twist (become
First path the 4th line P polarized light 21) incide light splitting device 6 and its polarization beam splitter is crossed in transmission, get into projection objective at last.
Second path, the first line P polarized light 14 of polarization beam splitter 22 is crossed in transmission(become through half-wave plate 5 direction half-twists
Second path, the second line S polarized light 15) entering light splitting device 6.
Second path, the second line S polarized light 15Reflexed on the 2nd LCoS micro display chip 7 by the polarization beam splitter 23 of light-dividing device 6, the linearly polarized light that has color image information through the ovennodulation rear section is reflected back toward second light splitting device 6 and direction half-twist, this bundle
The three-way P polarized light 16 in second pathTransmission is crossed polarization beam splitter and is incided the surface and post on second catoptron 8 of quarter-wave plate, and catoptron 8 becomes its reflected back light splitting device 6 and direction half-twist
Second path the 4th line S linearly polarized light 17And reflected second light splitting device 6 by polarization beam splitter.
At last from the light splitting device outgoing
Second path the 4th line S linearly polarized light 17With
First path the 4th line P polarized light 21Synthetic a branch of imaging beam 18 is after projection objective amplification imaging and make Projection Display and use.Only through the P linearly polarized light of a LCoS micro display chip 4 modulation, another part is the S linearly polarized light through 7 modulation of the 2nd LCoS micro display chip to the part of projected image like this.If it is parallel with the S linearly polarized light with the P linearly polarized light respectively that the beholder puts on polaroid glasses and the eyeglass direction processed by the orthogonal polaroid in polarization direction, then the beholder's two eyes just can only be seen P linearly polarized light image and S linearly polarized light image respectively.Under the situation of input corresponding to the stereo image information at right and left eyes visual angle on the first liquid crystal on silicon micro display chip 4, the second liquid crystal on silicon micro display chip 7; Beholder's left and right sides eyes just can be seen respectively image that should the visual angle, thereby form stereoscopic vision.
When the image information on two LCoS micro display chips is identical, can adjust the position of two LCoS micro display chips through the position adjusting mechanism (not shown), the projected image of the corresponding pixel of two chips is overlapped fully.When in initial assembling, overlap fully if guaranteed the projected image of the respective pixel of two chips, then the position of two chips can be fixed and not need regulating device.At this moment, the beholder needn't wear glasses and just can watch the two dimensional surface display image.
Because this liquid crystal on silicon stereoprojection ray machine does not need preparatory polarizer spare, different polarized lights has all obtained utilization, thereby can effectively improve the optical efficiency of system.
For the polarization beam splitter of existing conventional light splitting device, its transmitted light is different with catoptrical extinction ratio, and usually the extinction ratio of transmitted light (can greater than 1000:1) is far longer than its catoptrical extinction ratio (about tens to one).Among the present invention in order to improve the contrast of image; Make and incide on the LCoS micro display chip and passed through polarization beam splitter twice respectively from the imaging light of LCoS micro display chip reflection; And once once be transmission for reflection; Make the contrast of image improve greatly, and guaranteed the unusual balance of extinction ratio of two linearly polarized lights of final outgoing, thereby make the imaging beam extinction ratio generally after synthetic reach best.
In addition; Because the light source incident light is not parallel fully; Wide angle incident light and skew ray can produce how much rotations of polarization state on polarization beam splitter, in order to proofread and correct this effect, can also stick four/wave plate on LCoS micro display chip surface; To guarantee the contrast of system, an embodiment of liquid crystal on silicon stereoprojection ray machine of the present invention as shown in Figure 2.
The device and method according to the preferred embodiment of the invention that more than combined the detailed description of accompanying drawing.Yet those skilled in the art are very clear, under the situation that does not deviate from the spirit and scope of the present invention, can make various modifications and variation to it.Therefore, detailed description and the accompanying drawing to embodiment should be regarded as illustrative rather than restrictive.Scope proper right claim of the present invention limits.
Claims (10)
1. liquid crystal on silicon stereoprojection ray machine; Comprise light source (1), first light splitting device (2), second light splitting device (6), the first liquid crystal on silicon micro display chip (4), the second liquid crystal on silicon micro display chip (7), half-wave plate (5), first catoptron (3), second catoptron (8), projection objective (9), it is characterized in that:
The center light axis of light source (1), first light splitting device (2), half-wave plate (5), second light splitting device (6), projection objective (9) is set in sequence on same the center light axis; Be that half-wave plate (5) is arranged between first light splitting device (2), second light splitting device (6); Light source (1) is positioned at the plane of incidence place of first light splitting device (2), and projection objective (9) is positioned at the exit facet place of second light splitting device (6); The first liquid crystal on silicon micro display chip (4), first catoptron (3) be positioned at center light axis described in first light splitting device (2) both sides and parallel relatively; The second liquid crystal on silicon micro display chip (7) and second catoptron (8) be positioned at center light axis described in second light splitting device (6) both sides and parallel relatively; The first liquid crystal on silicon micro display chip (4) and second catoptron (8) are positioned at the same side, and first catoptron (3) and the second liquid crystal on silicon micro display chip (7) are positioned at the another side.
2. liquid crystal on silicon stereoprojection ray machine as claimed in claim 1 is characterized in that, the said first liquid crystal on silicon micro display chip (4), the second liquid crystal on silicon micro display chip (7) are colorized optical filtering type liquid crystal on silicon micro display chips.
3. liquid crystal on silicon stereoprojection ray machine as claimed in claim 1; It is characterized in that said first light splitting device (2) piles up parallel placement with second light splitting device (6), and first polarization beam splitter (22) is parallel with second polarization beam splitter (23).
4. liquid crystal on silicon stereoprojection ray machine as claimed in claim 1 is characterized in that quarter-wave plate is posted on the surface of first catoptron (3) and second catoptron (8).
5. liquid crystal on silicon stereoprojection ray machine as claimed in claim 1; It is characterized in that said first liquid crystal on silicon micro display chip (4) and surperficial first catoptron (3) that posts quarter-wave plate lay respectively at parallel two the relative sides of said first light splitting device (2), and surperficial first catoptron (3) that posts quarter-wave plate can receive at first from the light source light (13) of first polarization beam splitter (22) reflection.
6. according to claim 1 or claim 2 liquid crystal on silicon stereoprojection ray machine is characterized in that the first liquid crystal on silicon micro display chip (4), the second liquid crystal on silicon micro display chip (7) are the identical colorized optical filtering type liquid crystal on silicon micro display chip of primary colours.
7. according to claim 1 or claim 2 liquid crystal on silicon stereoprojection ray machine; It is characterized in that said stereoprojection ray machine also comprises position adjusting mechanism; Be used for when said ray machine is used for the common plane Projection Display, the position of finely tuning the said first liquid crystal on silicon micro display chip (4), the second liquid crystal on silicon micro display chip (7) is so that the image space of the respective pixel of said micro display chip overlaps.
8. liquid crystal on silicon stereoprojection ray machine according to claim 1 is characterized in that said light source (1) is white monochromatic source or the light source for being made up of red, green, blue three-color LED chipset.
9. liquid crystal on silicon stereoprojection ray machine according to claim 1 is characterized in that said light source (1) is a LASER Light Source, and said LASER Light Source is white monochromatic source or the light source for being made up of red, green, blue three look laser lamps.
10. according to claim 1 or 3 described liquid crystal on silicon stereoprojection ray machines, it is characterized in that said first light splitting device (2), second light splitting device (6) are wire grid polarization light splitting piece or polarization splitting prism.
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| CN201110351528XA CN102402016A (en) | 2011-11-09 | 2011-11-09 | Silica-based liquid crystal stereo projection light machine |
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| CN201110351528XA CN102402016A (en) | 2011-11-09 | 2011-11-09 | Silica-based liquid crystal stereo projection light machine |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103576435A (en) * | 2012-08-03 | 2014-02-12 | 精工爱普生株式会社 | Projector |
| CN104238133A (en) * | 2014-09-19 | 2014-12-24 | 西安中科晶像光电科技有限公司 | Three-dimensional desktop display system based on polarization |
| CN105988268A (en) * | 2015-01-27 | 2016-10-05 | 深圳市绎立锐光科技开发有限公司 | Projection imaging system |
| CN111158143A (en) * | 2018-11-08 | 2020-05-15 | 舜宇光学（浙江）研究院有限公司 | Micro projection light engine for near-eye display device |
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| CN2646733Y (en) * | 2003-07-18 | 2004-10-06 | 邵剑心 | 3D/2D switchable color projection display device |
| CN201637937U (en) * | 2010-01-21 | 2010-11-17 | 广景科技有限公司 | Novel three-dimensional projection device |
| TW201126252A (en) * | 2010-01-19 | 2011-08-01 | Shinyoptics Corp | Micro display device with dual liquid crystal on silicon (LCOS) panels |
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| JPH0720431A (en) * | 1993-06-30 | 1995-01-24 | Toshiba Corp | Liquid crystal display device |
| CN2646733Y (en) * | 2003-07-18 | 2004-10-06 | 邵剑心 | 3D/2D switchable color projection display device |
| EP1647963A1 (en) * | 2003-07-18 | 2006-04-19 | Kinoptics Technologies Inc. | A colorful projection display device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103576435A (en) * | 2012-08-03 | 2014-02-12 | 精工爱普生株式会社 | Projector |
| CN103576435B (en) * | 2012-08-03 | 2016-10-12 | 精工爱普生株式会社 | Scialyscope |
| CN104238133A (en) * | 2014-09-19 | 2014-12-24 | 西安中科晶像光电科技有限公司 | Three-dimensional desktop display system based on polarization |
| CN105988268A (en) * | 2015-01-27 | 2016-10-05 | 深圳市绎立锐光科技开发有限公司 | Projection imaging system |
| CN105988268B (en) * | 2015-01-27 | 2018-04-13 | 深圳市光峰光电技术有限公司 | Projection imaging system |
| CN111158143A (en) * | 2018-11-08 | 2020-05-15 | 舜宇光学（浙江）研究院有限公司 | Micro projection light engine for near-eye display device |
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Application publication date: 20120404 |