CN101546102A - Two-piece type liquid crystal micro-display engine system - Google Patents
Two-piece type liquid crystal micro-display engine system Download PDFInfo
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- CN101546102A CN101546102A CN200910061772A CN200910061772A CN101546102A CN 101546102 A CN101546102 A CN 101546102A CN 200910061772 A CN200910061772 A CN 200910061772A CN 200910061772 A CN200910061772 A CN 200910061772A CN 101546102 A CN101546102 A CN 101546102A
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Abstract
The invention relates to a two-piece type liquid crystal micro-display engine system. The method comprises the following steps that: after the light synthesis and polarized beam splitting of a semiconductor solid tricolor light source, two crossed polarized lights respectively illuminate one an LCD panel modulated by high speed time sequence; a high speed image processing unit decomposes an inputted real-time image into two groups of sub-images or two half images which are respectively displayed on the respective LCD panels according to the time sequence; and the images which are synchronously modulated by the two LCD panels are displayed on a screen through one projection objective after polarization and optical image synthesis. The system can make use of all light energy emitted from the light source without any polarization loss, and can also improve the display resolution by one fold through the optical synthesis of the images.
Description
Technical field
The invention belongs to the micro-display light engine field of projection display, particularly the two-piece type liquid crystal micro-display engine system of resolution and luminance gain.
Background technology
The little display projection system of Shang Yong liquid crystal mainly comprises one chip and three-chip type system in the market, and former structure is simple but brightness is not enough, and latter's structure is comparatively complicated, and cost is also higher; And there is the problem of polarization loss in the both, though can utilize part orthogonal polarization components light by polarization conversion system, often polarization conversion efficiency is less than 70%, and system is more complicated, and cost is also higher.So often not as Digital Light Processor (DLP) system, structure has limited it and has further applied also than complexity in the brightness of liquid crystal micro display system.
In order to simplify the structure of the little display engine of liquid crystal, reduce system cost, and can improve system brightness, multi-form two-piece type structure is suggested.United States Patent (USP) 4500172 early proposes a kind of two-piece type reflection display engine structure, a primitive look is presented on two panels all the time, two primitive looks then respectively are presented on a slice panel in addition, utilize the two-piece type structure can reach the brightness of similar three-chip type like this, but still require a polarized light source output primitive look, still there are the polarization loss problem in picture solid light source LED and common projection Halogen lamp LED etc.United States Patent (USP) 5863125 and 5921650 had described another one two-piece type engine structure afterwards, utilize the colour wheel modulation to obtain the polarized light of different colours bandwidth, and by polarization splitting prism (PBS) panel that throws light on respectively, wherein there is polarization loss in the colour wheel modulation, and also there is color filtration in colour wheel, and the utilization factor of light is very low.And Sharp, eLCOS etc. propose a similar two-piece type engine structure in WO 00/7-376 and United States Patent (USP) 6995738 and United States Patent (USP) 7008064, but they all need look selectivity retardation plate to come according to color a linearly polarized light to be decomposed into two crossed polarized lights synthetic then back of a panel of throwing light on separately to arrive screen by projection objective, this system still needs the linearly polarized light light source, and need one special, the look selectivity retardation plate that cost is higher.
In sum, though can utilizing different colours to illuminate two panels simultaneously, the two-piece type engine structure of having reported improves brightness in various degree, but they still need a polarized light source, and need color management components and parts to decompose polarization state, so still can't utilize all energy of the unpolarized light source of using always at present as solid light source LED and common projection Halogen lamp LED etc., reach the efficient that is similar to the little display engine of DLP, but also needing some special color management components and parts or polarization conversion systems, cost is also higher.
Summary of the invention
Defective and the problem of purpose of the present invention in order to overcome above-mentioned prior art, a kind of new all energy that can utilize unpolarized light source are provided, output brightness is doubled, and the two-piece type liquid crystal micro-display engine system that further display resolution is doubled.
Technical scheme of the present invention is: two-piece type liquid crystal micro-display engine system, the light source that comprises an energy output red nonpolarized light, the light source that can export green nonpolarized light, the light source of an energy output blue nonpolarized light and three collimation lens set, a convergent lens group, two light beam light-combining prisms, a polarized light splitting device, two energy sequential show red, green, the little display panel of high speed liquid crystal of blue three primary colours subimage, a high speed image processing unit, a polarization beam combiner spare, projection objective and screen, it is characterized in that: the light of the light source of each primitive look nonpolarized light output is after inciding one or two light beam light-combining prisms after the collimation lens set, be combined into coaxial three primary colours light through a convergent lens again, after polarized light splitting device was divided into two crossed polarized lights, a slice of throwing light on separately can sequential show red coaxial three primary colours light again, green, the little display panel of high speed liquid crystal of blue three primary colours subimage; The high speed image processing unit will be handled the video image of input in real time, resolve into two groups or be divided into the subimage of the red, green, blue three primary colours of two halves, be presented at respectively chronologically on two little display panels of high speed liquid crystal with the three primary colours phototiming ground of light source; Subimage through two little display panel modulation of high speed liquid crystal passes through polarization beam combiner spare, synthetic combination image, be presented on the screen through stagger behind the projection objective ground or stack, " at a high speed " in the little display panel of described high speed liquid crystal, the high speed image processing unit needs image update speed on the panel more than per second 180 frames.
The little display panel of liquid crystal is reflective type silicon-based liquid crystal (LCOS) panel or transmission-type liquid crystal (LCD) panel.
Coaxial three primary colours light is after polarized light splitting device is divided into two crossed polarized lights, wherein a branch of polarized light is directly or through the little display panel of catoptron back lighting liquid crystal, and another bundle polarized light is through switching mirror and two catoptrons or through a little display panel of catoptron back lighting liquid crystal.
Described unpolarized lighting source is the semiconductor solid light source.
Adjusting the little display panel of liquid crystal makes two width of cloth images on the screen at the half-pixel that just staggered in the angular direction.
Described polarized light splitting device and polarization beam combiner spare are combined.
Described polarized light splitting device is polarization spectro sheet or polarization splitting prism.
Described polarization beam combiner spare is that polarization closes bundle sheet or polarization beam cementing prism.
To the image of two little display panels of liquid crystal being modulated by the high speed sequential projected on the screen fully on the object plane of projection objective after the butt joint, the display image pixel of screen will double.
The high speed image processing unit is divided into two groups of images with realtime graphic, after every group of image resolves into the subimage of red, green, blue three primary colours, be presented at respectively on the little display panel of liquid crystal of two high speed sequential modulation with light source three primary colours phototiming ground, behind two cross polarization optical illumination, the crossed polarized light of transmission synthesizes axis light through polarization beam combiner spare and is projected on the screen by object lens, and two width of cloth images on the screen are at the half-pixel that just staggered in the angular direction.
The high speed image processing unit is divided into two halves with realtime graphic, after every group of image resolves into the subimage of red, green, blue three primary colours, be presented at respectively on the little display panel of liquid crystal of two high speed sequential modulation with light source three primary colours phototiming ground, after two and half images are thrown light on simultaneously by crossed polarized light through polarization beam combiner spare on screen again to being connected into entire image.
Polarized light splitting device of the present invention, the little display panel of liquid crystal, graphics processing unit, polarization beam combiner spare, projection objective and screen can be bought from market and obtain.
The present invention can not have the polarization loss land productivity with whole luminous energy of light emitted, and can utilize that the optics of image is synthetic to double display resolution.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is first kind of reflection type liquid crystal micro-display engine system structure.
Fig. 3 is second kind of reflection type liquid crystal micro-display engine system structure.
Fig. 4 be in second kind of scheme two width of cloth images at the half-pixel synoptic diagram that staggered in the angular direction.
Fig. 5 is the third reflection type liquid crystal micro-display engine system structure.
Fig. 6 is divided into the two halves synoptic diagram for realtime graphic in the third scheme.
Fig. 7 is first kind of transmission-type liquid crystal micro-display engine system structure.
Fig. 8 is second kind of transmission-type liquid crystal micro-display engine system structure.
Fig. 9 is the third transmission-type liquid crystal micro-display engine system structure.
Among the figure:---panel I is at screen
Image
◆---panel II is at screen
The image of curtain
Embodiment
The invention will be further described below in conjunction with accompanying drawing.
The present invention includes the light source that comprises an energy output red nonpolarized light, the light source that can export green nonpolarized light, the light source of an energy output blue nonpolarized light and three collimation lens set (241,242,243), a convergent lens group 244, two light beam light-combining prisms (251,252), a polarized light splitting device, two energy sequential show red, green, the little display panel of high speed liquid crystal of blue three primary colours subimage, a high speed image processing unit 50, a polarization beam combiner spare, projection objective 60 and screen 70, the light of the light source of each primitive look nonpolarized light output is after inciding one or two light beam light-combining prisms after the collimation lens set, again through another convergent lens group 244 synthetic coaxial three primary colours light, after polarized light splitting device was divided into two crossed polarized lights, a slice of throwing light on separately can sequential show red coaxial three primary colours light again, green, the little display panel of high speed liquid crystal of blue three primary colours subimage; High speed image processing unit 50 will be handled the video image of input in real time, resolve into two groups or be divided into the subimage of the red, green, blue three primary colours of two halves, be presented at respectively chronologically on two little display panels of high speed liquid crystal with the three primary colours phototiming ground of light source; Subimage through two little display panel modulation of high speed liquid crystal passes through polarization beam combiner spare, and synthetic combination image is through ground or overlapping being presented on the screen 70 of staggering behind the projection objective.Described unpolarized lighting source is the semiconductor solid light source.Described polarized light splitting device and polarization beam combiner spare are combined.The little display panel of liquid crystal is reflective type silicon-based liquid crystal (LCOS) panel, also can be transmission-type liquid crystal (LCD) panel.
In Fig. 1, the unpolarized three primary colours light (red-light LED 21, green light LED 22, blue-ray LED 23) of semiconductor solid light source output, through three collimation lens set (241,242,243), the synthetic coaxial three primary light sources of two light beam light-combining prisms (251,252) and convergent lens group 244 backs, again through being divided into two crossed polarized lights behind polarization spectro, the bundling device spare 30, the little display panel of liquid crystal (41,42) that the high speed sequential of throwing light on is separately modulated; High speed image processing unit 50 will be handled the video image of input in real time, resolve into the subimage of two groups of red, green, blue three primary colours, be presented at respectively chronologically on two little display panels of liquid crystal with light source three primary colours phototiming ground; Subimage through the little display panel modulation of liquid crystal passes through polarization spectro, bundling device spare 30, and synthetic combination image is presented on the screen 70 through behind the projection objective 60.Two picture groups of being decomposed by the high speed image processing unit similarly are two groups of identical subimages, through overlapping being presented on the screen 70 behind the projection objective, make screen intensity double than one chip light engine arrangement.
In Fig. 2, the unpolarized three primary colours light (red-light LED 21, green light LED 22, blue-ray LED 23) of semiconductor solid light source output, through three collimation lens set (241,242,243), two light beam light-combining prisms (251,252) and will evenly throw light on after convergent lens group 244 two little display panels of reflection type liquid crystal, normally reflective type silicon-based liquid crystal (LCOS) panel; Synthetic coaxial three primary colours light is polarized beam split, bundling device spare 30 is divided into two crossed polarized lights, wherein polarization beam splitting, bundling device spare are that polarization splitting prism, beam cementing prism combine and form, the little display panel of liquid crystal (41,42) that the high speed sequential of throwing light on is separately modulated; High speed image processing unit 50 will be handled the video image of input in real time, resolve into the subimage of two groups of red, green, blue three primary colours, with the phototiming of light source three primary colours be simultaneously displayed on two little display panels of liquid crystal; Image through the little display panel modulation of liquid crystal passes through polarization spectro, bundling device spare 30, and synthetic combination image is presented on the screen 70 fully overlappingly through behind the projection objective 60.Be polarized pairwise orthogonal polarized light that beam split, bundling device spare 30 decompose will be same polarization spectro, bundling device spare 30 in twice by polarization spectro and close the bundle face, make light engine systems can reach very high contrast.And this automotive engine system can utilize two polarized components of unpolarized light source simultaneously, and efficient will double than common one chip that can only receive polarized light source and two-piece type engine.
In Fig. 3, the unpolarized three primary colours light (red-light LED 21, green light LED 22, blue-ray LED 23) of semiconductor solid light source output, through three collimation lens set (241,242,243), two light beam light-combining prisms (251,252) and after a convergent lens group 244 synthesize coaxial three primary colours light, again through being divided into two crossed polarized lights behind polarization spectro, the bundling device spare 30, wherein polarization beam splitting, bundling device spare are the polarization spectro sheet, close the bundle sheet and combine and form, the little display panel of liquid crystal (41,42) that the high speed sequential of throwing light on is separately modulated; High speed image processing unit 50 is divided into two groups of images with realtime graphic, every group of image resolves into red, green, behind the subimage of blue three primary colours, be presented at respectively on the little display panel of liquid crystal of two high speed sequential modulation with light source three primary colours phototiming ground, behind two cross polarization optical illumination, the crossed polarized light of reflection is through polarization spectro, bundling device spare 30 synthesizes axis light and is projected on the screen 70 by projection objective 60, adjust two little display panels of liquid crystal, make two width of cloth images on the screen at the half-pixel that just staggered in the angular direction, as shown in Figure 4, such two groups of images make screen display resolution double, because all unpolarized light source all are utilized, the brightness of screen also doubles simultaneously.
In Fig. 5, the unpolarized three primary colours light (red-light LED 21, green light LED 22, blue-ray LED 23) of semiconductor solid light source output, through three collimation lens set (241,242,243), two light beam light-combining prisms (251,252) and after a convergent lens group 244 synthesize coaxial three primary colours light, again through being divided into two crossed polarized lights behind the polarization spectro sheet 311; The little display panel 42 of liquid crystal of S polarized illumination high speed sequential modulation, behind P polarized light process catoptron 33 and the polarization spectro sheet 312, the little display panel 41 of liquid crystal of another piece high speed sequential modulation of throwing light on; Two bundle polarized lights close bundle sheet 32 backs through polarization again and are throwed away by projection objective.Polarization spectro and polarization Compositing Engine structure Design will project on the screen 70 image of two little display panels of liquid crystal being modulated by the high speed sequential fully after the butt joint on the object plane of projection objective 60, the display image pixel of screen will double.Simultaneously high speed image processing unit 50 is divided into two halves with realtime graphic, after every group of image resolves into the subimage of red, green, blue three primary colours, be presented at respectively on the little display panel of liquid crystal of two high speed sequential modulation with light source three primary colours phototiming ground, after two and half images are thrown light on simultaneously by crossed polarized light through polarization close bundle sheet 32 and projection objective 60 on screen again to being connected into entire image, as shown in Figure 6, make that by above-mentioned processing the brightness of image that shows is evenly shown.Each half image is decomposed and is presented on the little display panel of liquid crystal, and the resolution of image will double, and all simultaneously unpolarized light source all are utilized, and the brightness of screen also will double.
In Fig. 7, the unpolarized three primary colours light (red-light LED 21, green light LED 22, blue-ray LED 23) of semiconductor solid light source output, through three collimation lens set (241,242,243), two light beam light-combining prisms (251,252) and be polarized light splitting piece 31 behind the synthetic coaxial three primary colours light in convergent lens group 244 backs and be divided into two crossed polarized lights, the S polarized light little display panel 43 of transmission-type liquid crystal (LCD) that evenly throws light on, the P polarized light is through switching mirror 34 and the little display panel 44 of two catoptrons (331,332) back another piece transmission-type liquid crystal of even illumination; High speed image processing unit 50 will be handled the video image of input in real time, resolve into the subimage of one group of red, green, blue three primary colours, with the phototiming of light source three primary colours be simultaneously displayed on two little display panels of liquid crystal; Image through the little display panel modulation of liquid crystal closes bundle sheet 32 by polarization, and synthetic combination image is presented on the screen 70 fully overlappingly through behind the projection objective 60.This automotive engine system can be utilized two polarized components of unpolarized light source simultaneously, and efficient will double than common one chip that can only receive polarized light source and two-piece type engine.
In Fig. 8, the unpolarized three primary colours light (red-light LED 21 of semiconductor solid light source output, green light LED 22, blue-ray LED 23), through three collimation lens set (241,242,243), two light beam light-combining prisms (251,252) and be polarized light splitting piece and polarization behind the synthetic coaxial three primary colours light in convergent lens group 244 backs and close bundle sheet 30 and be divided into two crossed polarized lights, polarization beam splitting wherein, bundling device spare is the polarization spectro sheet, closing the bundle sheet combines and forms, the S polarized light is through the little display panel 44 of catoptron 332 back even illumination transmission-type liquid crystal (LCD), and the little display panel 43 of another piece transmission-type liquid crystal evenly throws light in P polarized light process catoptron 331 backs; High speed image processing unit 50 is divided into two groups of images with realtime graphic, every group of image resolves into red, green, behind the subimage of blue three primary colours, be presented at respectively on the little display panel of liquid crystal of two high speed sequential modulation with light source three primary colours phototiming ground, behind two cross polarization optical illumination, the crossed polarized light of reflection is through polarization beam splitting, bundling device spare 30 synthesizes axis light and is projected on the screen 70 by projection objective 60, adjust two little display panels of liquid crystal, make two width of cloth images on the screen at the half-pixel that just staggered in the angular direction, as shown in Figure 4, such two groups of images make screen display resolution double, because all unpolarized light source all are utilized, the brightness of screen also doubles simultaneously.
In Fig. 9, the unpolarized three primary colours light (red-light LED 21 of semiconductor solid light source output, green light LED 22, blue-ray LED 23), through three collimation lens set (241,242,243), two light beam light-combining prisms (251,252) and behind the synthetic coaxial three primary colours light in convergent lens group 244 backs be polarized beam splitting, bundling device spare 30 is divided into two crossed polarized lights, polarization beam splitting wherein, bundling device spare is the polarization spectro sheet, closing the bundle sheet combines and forms, the S polarized light is through the little display panel 44 of catoptron 332 back even illumination transmission-type liquid crystal (LCD), and the little display panel 43 of another piece transmission-type liquid crystal evenly throws light in P polarized light process catoptron 331 backs; Two bundle polarized lights are throwed away by projection objective 60 through polarization beam splitting, bundling device spare 30 backs again.Polarization spectro and polarization Compositing Engine structure Design will project on the screen 70 image of two little display panels of liquid crystal being modulated by the high speed sequential fully after the butt joint on the object plane of projection objective 60, the display image pixel of screen will double.Simultaneously high speed image processing unit 50 is divided into two halves with realtime graphic, after every group of image resolves into the subimage of red, green, blue three primary colours, be presented at respectively on the little display panel of liquid crystal of two high speed sequential modulation with light source three primary colours phototiming ground, after two and half images are thrown light on simultaneously by crossed polarized light through polarization close bundle, projection objective is projected on the screen again to being connected into entire image, as shown in Figure 6, make that by handling the brightness of image that shows is evenly shown simultaneously.Each half image is decomposed and is presented on the little display panel of liquid crystal, and the resolution of image will double, and all simultaneously unpolarized light source all are utilized, and the brightness of screen also will double.
Claims (8)
1, two-piece type liquid crystal micro-display engine system, the light source that comprises an energy output red nonpolarized light, the light source that can export green nonpolarized light, the light source of an energy output blue nonpolarized light and three collimation lens set, a convergent lens group, two light beam light-combining prisms, a polarized light splitting device, two energy sequential show red, green, the little display panel of high speed liquid crystal of blue three primary colours subimage, a high speed image processing unit, a polarization beam combiner spare, projection objective and screen, it is characterized in that: the light of the light source of each primitive look nonpolarized light output is after inciding one or two light beam light-combining prisms after the collimation lens set, be combined into coaxial three primary colours light through a convergent lens again, after polarized light splitting device was divided into two crossed polarized lights, a slice of throwing light on separately can sequential show red coaxial three primary colours light again, green, the little display panel of high speed liquid crystal of blue three primary colours subimage; The high speed image processing unit will be handled the video image of input in real time, resolve into two groups or be divided into the subimage of the red, green, blue three primary colours of two halves, be presented at respectively chronologically on two little display panels of high speed liquid crystal with the three primary colours phototiming ground of light source; Subimage through two little display panel modulation of high speed liquid crystal passes through polarization beam combiner spare, synthetic combination image, be presented on the screen through stagger behind the projection objective ground or stack, " at a high speed " in the little display panel of described high speed liquid crystal, the high speed image processing unit needs image update speed on the panel more than per second 180 frames.
2, two-piece type liquid crystal micro-display engine system according to claim 1 is characterized in that: the little display panel of liquid crystal is reflective type silicon-based liquid crystal (LCOS) panel or transmission-type liquid crystal (LCD) panel.
3, two-piece type liquid crystal micro-display engine system according to claim 1, it is characterized in that: coaxial three primary colours light is after polarized light splitting device is divided into two crossed polarized lights, wherein a branch of polarized light is directly or through the little display panel of catoptron back lighting liquid crystal, and another bundle polarized light is through switching mirror and two catoptrons or through a little display panel of catoptron back lighting liquid crystal.
4, according to the described two-piece type liquid crystal micro-display engine system of one of claim 1,2 or 3, it is characterized in that: described unpolarized lighting source is the semiconductor solid light source.
5, two-piece type liquid crystal micro-display engine system according to claim 4 is characterized in that: adjust the little display panel of liquid crystal and make two width of cloth images on the screen at the half-pixel that just staggered in the angular direction.
6, two-piece type liquid crystal micro-display engine system according to claim 4 is characterized in that: described polarized light splitting device and polarization beam combiner spare are combined.
7, two-piece type liquid crystal micro-display engine system according to claim 4 is characterized in that: described polarized light splitting device is polarization spectro sheet or polarization splitting prism.
8, two-piece type liquid crystal micro-display engine system according to claim 4 is characterized in that: described polarization beam combiner spare is that polarization closes bundle sheet or polarization beam cementing prism.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI456265B (en) * | 2012-03-08 | 2014-10-11 | Wintek Corp | Image sensor and optical interaction device using the same thereof |
| CN108613110A (en) * | 2016-12-22 | 2018-10-02 | 深圳市绎立锐光科技开发有限公司 | A kind of light-source system, automobile lighting system and control method |
| CN109445240A (en) * | 2018-12-07 | 2019-03-08 | 深圳彩翼光电科技有限公司 | A kind of light source of projector light path system |
| CN110174812A (en) * | 2019-06-06 | 2019-08-27 | 郭瀚文 | A kind of two-piece type LCD projector based on half-court sequence display mode |
| CN110262170A (en) * | 2019-06-06 | 2019-09-20 | 郭瀚文 | A kind of two-piece type LCD projector based on PBS division light |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107505806B (en) * | 2017-09-08 | 2020-06-30 | 海信视像科技股份有限公司 | DMD modulation imaging system and laser projection equipment |
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2009
- 2009-04-28 CN CN2009100617725A patent/CN101546102B/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI456265B (en) * | 2012-03-08 | 2014-10-11 | Wintek Corp | Image sensor and optical interaction device using the same thereof |
| CN108613110A (en) * | 2016-12-22 | 2018-10-02 | 深圳市绎立锐光科技开发有限公司 | A kind of light-source system, automobile lighting system and control method |
| CN109445240A (en) * | 2018-12-07 | 2019-03-08 | 深圳彩翼光电科技有限公司 | A kind of light source of projector light path system |
| CN110174812A (en) * | 2019-06-06 | 2019-08-27 | 郭瀚文 | A kind of two-piece type LCD projector based on half-court sequence display mode |
| CN110262170A (en) * | 2019-06-06 | 2019-09-20 | 郭瀚文 | A kind of two-piece type LCD projector based on PBS division light |
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