CN204009346U - Stereo projection system - Google Patents
Stereo projection system Download PDFInfo
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- CN204009346U CN204009346U CN201420334672.1U CN201420334672U CN204009346U CN 204009346 U CN204009346 U CN 204009346U CN 201420334672 U CN201420334672 U CN 201420334672U CN 204009346 U CN204009346 U CN 204009346U
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- liquid crystal
- projection system
- stereo projection
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- light valve
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Abstract
The utility model relates to stereo projection system, and described stereo projection system comprises successively along optical path direction: projector, heat reflection unit, anti-reflection unit, linear polarizer, polarization state converter, optics self compensation flexure type liquid crystal light valve, projection screen and rotatory polarization glasses; Described stereo projection system also comprises one drive circuit, for extract the frame rate synchronizing signal of right and left eyes image from described projector, and with dynamical fashion, drives optics self compensation flexure type liquid crystal light valve according to extracting result.The utlity model has higher transmitance, synchronous degree, contrast, in longer serviceable life, can obviously improve the problems such as ghost image, luminance loss and serviceable life is short.
Description
Technical field
The utility model relates to stereo projection system.
Background technology
In existing three-dimensional film technology, the general frequency of 144Hz that adopts is carried out the broadcasting of three-dimensional film, this 144 frame comprises 72 frame left eye pictures and 72 frame right eye pictures, in 72 frame pictures of every eye correspondence, reality only has 24 width pictures, every width picture repeat playing 3 times, thus form 72 frame pictures; With the broadcasting speed of every eyes 24 width pictures per second, when playing the picture of high-speed motion, because number of pictures is not enough, tend to cause fuzzy pictures and hangover, image quality is obviously declined.In order to improve the fuzzy of high-speed motion picture and hangover, digital movie machine manufacturer is respectively to having gone out the play-back technology of 48 frames or higher frame rate, and corresponding film Play Server also upgrades to 48 frames or higher frame rate.Yet existing use liquid crystal light valve carries out light in the 3D equipment of polarization adjustment, its liquid crystal light valve response time, in millisecond rank, when frequency improves, often because response speed is fast not, can be caused degradation problem under 3D effect.
Utility model content
The purpose of this utility model is to propose a kind of stereo projection system, and it can solve the poor problem of 3D effect.
In order to achieve the above object, the technical scheme that the utility model adopts is as follows:
Stereo projection system, described in it, stereo projection system comprises successively along optical path direction:
For alternately playing the projector of left-eye image and eye image;
Heat reflection unit for reflects infrared light;
For improving the anti-reflection unit of the transmitance of visible ray;
For the light of anti-reflection unit outgoing being converted to the linear polarizer of linearly polarized light;
For described linearly polarized light being converted to the polarization state converter of circularly polarized light;
Optics self compensation flexure type liquid crystal light valve for circularly polarized light described in synchronous modulation;
For the circularly polarized light of described optics self compensation flexure type liquid crystal light valve output being reflexed to the projection screen of one or more rotatory polarization glasses;
Described rotatory polarization glasses are for separating of left-eye image and the eye image of described projection screen reflection;
Described stereo projection system also comprises one drive circuit, for extract the frame rate synchronizing signal of right and left eyes image from described projector, and with dynamical fashion, drives optics self compensation flexure type liquid crystal light valve according to extracting result.
Preferably, described linear polarizer be transmitance higher than 43% and degree of polarization higher than 99.9% polaroid.
Preferably, the thickness of the liquid crystal layer of described optics self compensation flexure type liquid crystal light valve between 1 micron to 4 microns, not during making alive the optical delay amount of liquid crystal layer between 600nm-1000nm; Under minimum bending status voltage, the optical delay amount that liquid crystal layer is corresponding is more than or equal to 1/2 wavelength.
Preferably, the Liquid Crystal Molecules Alignment direction in described optics self compensation flexure type liquid crystal light valve becomes 45 degree with the polarizing axis angle of described linear polarizer.
Preferably, described polarization state converter is an one-quarter wavelength retardation film, and its optical axis direction is parallel with the long axis of liquid crystal molecule projecting direction in described optics self compensation flexure type liquid crystal light valve, and retardation scope is between 100nm～175nm.
Preferably, the plane of light incidence of described linear polarizer is coated with one deck antireflection film.
The utlity model has following beneficial effect:
Adopt OCB (Optical self-Compensated Bend Mode, optics self compensation beam mode) single projector stereo projection apparatus of type liquid crystal light valve, coordinate dynamic driving technology, optics self compensation flexure type liquid crystal light valve can be adjusted at a high speed polarized state of light, has realized the stereoprojection of higher frame rate.Than the stereo projection apparatus of other liquid crystal light valve types, the utlity model has higher transmitance, synchronous degree, contrast, in longer serviceable life, can obviously improve the problems such as ghost image, luminance loss and serviceable life is short; And simple in structure, with low cost, utilize Yi Tai projector arrange in pairs or groups single liquid crystal light valve and supporting driving circuit, spectators can watch stereoprojection by wearing rotatory polarization glasses.
Accompanying drawing explanation
Fig. 1 is the structural representation of the stereo projection system of the utility model preferred embodiment.
Reference numeral: 1, projector; 2, heat reflection unit; 3, anti-reflection unit; 4, driving circuit; 5, linear polarizer; 6, polarization state converter; 7, optics self compensation flexure type liquid crystal light valve; 8, projection screen; 9, rotatory polarization glasses.
Embodiment
Below, by reference to the accompanying drawings and embodiment, the utility model is described further.
As shown in Figure 1, a stereo projection system, described in it, stereo projection system comprises successively along optical path direction: projector 1, heat reflection unit 2, anti-reflection unit 3, linear polarizer 5, polarization state converter 6, optics self compensation flexure type liquid crystal light valve 7, projection screen 8 and at least one rotatory polarization glasses 9.Also comprise one drive circuit 4.
Projector 1 is for alternately playing left-eye image and eye image, for example in the mode of frame sequential, play, the first frame is play left-eye image, the second frame is play eye image, the 3rd frame is play left-eye image again, the 4th frame is play eye image again ... by that analogy, from hardware, requirement can support that frame rate is the video playback of 1OOHZ or higher frame rate.
Heat reflection unit 2, for the heat reflection unit of reflects infrared light, to reduce the temperature of optics self compensation flexure type liquid crystal light valve 7, improves the serviceable life of whole system.
Anti-reflection unit 3, for improving the transmitance of visible ray, to reduce visible ray reflection loss, improves brightness;
Linear polarizer 5 is for being converted to linearly polarized light by the light of anti-reflection unit 3 outgoing, specifically can adopt transmitance higher than 43%, degree of polarization is higher than 99.9% polaroid or other polarizers.In order to increase light utilization efficiency, also can be at plane of light incidence plating one deck antireflection film of linear polarizer 5.
Polarization state converter 6 is for being converted to circularly polarized light by described linearly polarized light, described circularly polarized light comprises left circularly polarized light and right-circularly polarized light, described polarization state converter is an one-quarter wavelength retardation film, its optical axis direction is parallel with the long axis of liquid crystal molecule projecting direction in described optics self compensation flexure type liquid crystal light valve, and retardation scope is between 100nm～175nm.For strengthening achromatism effect, can adopt wideband quarter wave plate.
Optics self compensation flexure type liquid crystal light valve 7 is for circularly polarized light described in synchronous modulation, the output light that odd-numbered frame is inferior and even frame is inferior of synchronous modulation polarization state converter 6, the left circularly polarized light seeing through from modulating polarization state converter is converted into and right-circularly polarized light, or left circularly polarized light is not produced to any effect.
Particularly, optics self compensation flexure type liquid crystal light valve 7 for when the odd-numbered frame (tl) to the polarization state of described left circularly polarized light remain unchanged, during in even frame (t2) described left circularly polarized light is converted to right-circularly polarized light; Or, for when the even frame (tl) to the polarization state of described left circularly polarized light remain unchanged, during in odd-numbered frame (t2) described left circularly polarized light is converted to right-circularly polarized light.
The thickness of the liquid crystal layer of described optics self compensation flexure type liquid crystal light valve 7 between 1 micron to 4 microns, not during making alive the optical delay amount of liquid crystal layer between 600nm-1000nm; Under minimum bending status voltage, the optical delay amount that liquid crystal layer is corresponding is more than or equal to 1/2 wavelength.Liquid Crystal Molecules Alignment direction in described optics self compensation flexure type liquid crystal light valve 7 becomes 45 degree with the polarizing axis angle of described linear polarizer 5.
Projection screen 8 is for reflexing to rotatory polarization glasses 9 by the circularly polarized light of described optics self compensation flexure type liquid crystal light valve 7 outputs.Reflected light has kept from the circular polarization polarized state of light of optics self compensation flexure type liquid crystal light valve 7 outputs, and rotatory polarization glasses 9 are again by right and left eyes separation of images.Above-mentioned projection screen 8 must be metal screen, and incident polarization light, after the reflection of metal screen, can keep the polarization state of incident polarized light, substantially without moving back polarization phenomena, occurs.The right and left eyes of rotatory polarization glasses 9 is corresponding left-handed rotatory polarization sheet and dextrorotation rotatory polarization sheet respectively, be specifically as follows the corresponding left-handed rotatory polarization sheet of left eye, the corresponding dextrorotation rotatory polarization of right eye sheet, or the corresponding dextrorotation rotatory polarization of left eye sheet, the corresponding left-handed rotatory polarization sheet of right eye conversely.
Described driving circuit 4, for extract the frame rate synchronizing signal of right and left eyes image from described projector 1, and drives optics self compensation flexure type liquid crystal light valve 7 according to extracting result with dynamical fashion.
The present embodiment principle of work be: heat reflection unit 2, anti-reflection unit 3, linear polarizer 5, polarization state converter 6, optics self compensation flexure type liquid crystal light valve 7 are located at before the l of projector camera lens successively.Video input signals divides right and left eyes picture signal, is alternately transferred to successively the l of projector, the l of projector according to time sequential mode play successively left eye picture and right eye picture, i.e. respectively corresponding odd-numbered frame picture and even frame picture of right and left eyes picture; The light that the l of projector sends projects on projection screen 8 through heat reflection unit 2, anti-reflection unit 3, linear polarizer 5, polarization state converter 6, optics self compensation flexure type liquid crystal light valve 7 successively, light is through the reflection of projection screen 8, light still keeps circularly polarized state, viewers wear rotatory polarization glasses 9 can be seen respectively left-eye image and eye image, realize the separated of left-eye image and eye image, thereby realize 3D, show.
For a person skilled in the art, can make other various corresponding changes and distortion according to technical scheme described above and design, and these all changes and distortion all should belong to the protection domain of the utility model claim within.
Claims (7)
1. stereo projection system, is characterized in that, described stereo projection system comprises successively along optical path direction:
For alternately playing the projector of left-eye image and eye image;
Heat reflection unit for reflects infrared light;
For improving the anti-reflection unit of the transmitance of visible ray;
For the light of anti-reflection unit outgoing being converted to the linear polarizer of linearly polarized light;
For described linearly polarized light being converted to the polarization state converter of circularly polarized light;
Optics self compensation flexure type liquid crystal light valve for circularly polarized light described in synchronous modulation;
For the circularly polarized light of described optics self compensation flexure type liquid crystal light valve output being reflexed to the projection screen of one or more rotatory polarization glasses;
Described rotatory polarization glasses are for separating of left-eye image and the eye image of described projection screen reflection;
Described stereo projection system also comprises one drive circuit, for extract the frame rate synchronizing signal of right and left eyes image from described projector, and with dynamical fashion, drives optics self compensation flexure type liquid crystal light valve according to extracting result.
2. stereo projection system as claimed in claim 1, is characterized in that, described linear polarizer be transmitance higher than 43% and degree of polarization higher than 99.9% polaroid.
3. stereo projection system as claimed in claim 1, is characterized in that, the thickness of the liquid crystal layer of described optics self compensation flexure type liquid crystal light valve between 1 micron to 4 microns, not during making alive the optical delay amount of liquid crystal layer between 600nm-1000nm; Under minimum bending status voltage, the optical delay amount that liquid crystal layer is corresponding is more than or equal to 1/2 wavelength.
4. stereo projection system as claimed in claim 1, is characterized in that, the Liquid Crystal Molecules Alignment direction in described optics self compensation flexure type liquid crystal light valve becomes 45 degree with the polarizing axis angle of described linear polarizer.
5. stereo projection system as claimed in claim 1, it is characterized in that, described polarization state converter is an one-quarter wavelength retardation film, its optical axis direction is parallel with the long axis of liquid crystal molecule projecting direction in described optics self compensation flexure type liquid crystal light valve, and retardation scope is between 100nm～175nm.
6. stereo projection system as claimed in claim 1, is characterized in that, the plane of light incidence of described linear polarizer is coated with one deck antireflection film.
7. stereo projection system as claimed in claim 1, is characterized in that, described projection screen is metal screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420334672.1U CN204009346U (en) | 2014-06-20 | 2014-06-20 | Stereo projection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420334672.1U CN204009346U (en) | 2014-06-20 | 2014-06-20 | Stereo projection system |
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| Publication Number | Publication Date |
|---|---|
| CN204009346U true CN204009346U (en) | 2014-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420334672.1U Expired - Fee Related CN204009346U (en) | 2014-06-20 | 2014-06-20 | Stereo projection system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113009770A (en) * | 2020-05-14 | 2021-06-22 | 中影光峰激光影院技术（北京）有限公司 | Stereoscopic projection system |
-
2014
- 2014-06-20 CN CN201420334672.1U patent/CN204009346U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113009770A (en) * | 2020-05-14 | 2021-06-22 | 中影光峰激光影院技术（北京）有限公司 | Stereoscopic projection system |
| CN113009770B (en) * | 2020-05-14 | 2023-08-29 | 中影光峰激光影院技术（北京）有限公司 | Stereoscopic projection system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180316 Address after: Baoan District Songgang Tangxia street Shenzhen city Guangdong province 518000 Yong Fu Tong Road No. 13 Building A building 308 Patentee after: Shenzhen Jin Jia Electronics Co., Ltd. Address before: 518000 Shenzhen, Shenzhen City, Guangdong, Shenzhen, Longhua, Longhua, Da Yu Cui Cui new village, 50 rooms, room 1006 Patentee before: Huang Jianghua |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141210 Termination date: 20210620 |
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| CF01 | Termination of patent right due to non-payment of annual fee |