CN101790062B - Stereoprojection device of single projector with single liquid crystal light valve - Google Patents
Stereoprojection device of single projector with single liquid crystal light valve Download PDFInfo
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- CN101790062B CN101790062B CN2010101317858A CN201010131785A CN101790062B CN 101790062 B CN101790062 B CN 101790062B CN 2010101317858 A CN2010101317858 A CN 2010101317858A CN 201010131785 A CN201010131785 A CN 201010131785A CN 101790062 B CN101790062 B CN 101790062B
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Abstract
The invention relates to a stereoprojection device of a single projector with a single liquid crystal light valve. The stereoprojection device comprises a projector, a synchronous circuit, a self-compensation bending mode liquid crystal light valve, a movie screen and rotary polaroid glasses. A linear polarizer is positioned before a lens of a projector; the self-compensation bending mode liquid crystal light valve is positioned outside the linear polarizer; one side of the lens of the projector is the inside; video input signals comprise left and right eye image signals which are alternatively transmitted to the projector in sequence; light emitted by the projector passes through the linear polarizer and the self-compensation bending mode liquid crystal light valve in sequence and is projected to the movie screen; and audience can watch the movie screen by wearing the rotary polaroid glasses. The invention has the advantages of simple structure, simple circuit and low cost and is free from considering the counterpoint problem of stereoscopic images of two projectors. The stereoprojection effect can be realized by only using one projector; and the cost of the stereoprojection device is lower than that of a tereoprojection system of double projectors.
Description
Technical field
The present invention relates to stereo projection apparatus, particularly a kind of Stereoprojection device of single projector with single liquid crystal light valve, utilize projector's collocation liquid crystal light valve and polaroid glasses to realize the stereoprojection effect.
Background technology
Two projectors of existing stereo projection technology general using, install respectively fixing Left-hand circular polarization device and right-hand circular polarization device before two camera lenses additional, light is converted into Left-hand circular polarization and right-circularly polarized light, two projectors are projected in a screen simultaneously, can watch stereopsis after viewers wear circular polarizing disk glasses.This kind mode needs two projector's exactitude positions, to guarantee the accuracy of projected position, uses simultaneously two projectors, and cost is higher.
Summary of the invention
The object of the present invention is to provide a kind of new single light valve single projector stereo projection apparatus, control polarized state of light by liquid crystal light valve, realized the mode of separate unit projector project stereoscopic image.
The invention provides single light valve single projector stereo projection apparatus comprises:
Projector, synchronous circuit, self compensation beam mode liquid crystal light valve, screen and rotatory polarization glasses.
Projector is used for supporting that frame rate is 100HZ or higher video playback; Adopt DLP technology, LCOS technology, LCD technology etc.
Linear polarizer is for generation of linearly polarized light; Adopt degree of polarization higher than 99% polaroid or the line polarizing device of other same functions.
Optics self compensation beam mode liquid crystal light valve is used for transferring linearly polarized light to left circularly polarized light or right-circularly polarized light;
Synchronous circuit: be used for gathering from the video signal input terminal mouth frame rate signal of right and left eyes image, produce simultaneously the synchronous voltage signal that is used for driving liquid crystal light valve;
Rotatory polarization glasses: wear when spectators watch projection, for separating of the right and left eyes image;
Screen is common screen or high metal screen.
Before linear polarizer was positioned at projector lens, optics self compensation beam mode liquid crystal light valve was positioned at the linear polarizer outside (projector lens one side is for inboard).
Video input signals divides the right and left eyes picture signal, and alternate transmission is to projector successively, and the light that projector sends projects to screen after passing through successively linear polarizer, optics self compensation beam mode liquid crystal light valve, wears the circular polarization glasses and watches screen.
Described linear polarizer, liquid crystal light valve and synchronous circuit can be used as the outside extention of common projector, also can be built in projector inside.Linearly polarized light device light transmission shaft becomes with liquid crystal molecule projecting direction in liquid crystal light valve that in miter angle or linearly polarized light device light transmission shaft and liquid crystal light valve, the liquid crystal molecule projecting direction becomes to bear miter angle.
Described rotatory polarization glasses left eye and right eye polarizer are respectively Left-hand circular polarization sheet and right-hand circular polarization sheet, and left eye polarizer and right eye polarizer are commutative.
Described optics self compensation beam mode liquid crystal light valve (being ocb mode, also claiming the π box, is thickness of liquid crystal layer less than or equal to 6 microns?) time of response: 0.5 millisecond of rise time or below, 1.2 milliseconds of fall times or below.
Described synchronous circuit can produce two ac voltage signal high voltages, and the retardation of liquid crystal light valve is remained on 1/4 wavelength; Low-voltage can remain on the retardation of liquid crystal light valve 3/4 wavelength; High-tension value is generally between 3V to 10V, and typical high-voltage value is 6V to 7V.The value of low-voltage is generally between 0V to 3V, and typical low voltage value is 1V to 2V.
The invention provides a kind of new Stereoprojection device of single projector with single liquid crystal light valve, control polarized state of light by liquid crystal light valve, realized the mode of separate unit projector project stereoscopic image, stereo projection apparatus than the dual-projection machine, the present invention is simple in structure, circuit is simple, and cost is low, need not to consider two projectors projected image contraposition problem.Utilize a liquid crystal light valve of projector's collocation and support circuit, spectators can watch the stereoprojection effect by wearing polaroid glasses.
Description of drawings:
Fig. 1: the present invention single projector stereo projection apparatus schematic diagram.
Fig. 2: the location drawing of linearly polarized light device and liquid crystal light valve (mode one).
Fig. 3: the location drawing of linearly polarized light device and liquid crystal light valve (mode two).
Fig. 4: the conversion schematic diagram of each optical states during the present invention single projector stereo projection apparatus work.
Embodiment
The present invention is described in detail as follows with reference to accompanying drawing
As shown in the figure, Fig. 1: the present invention single projector stereo projection apparatus schematic diagram.Fig. 2: mode for the moment in linearly polarized light device 2 light transmission shafts and liquid crystal light valve 4 the liquid crystal molecule projecting direction become miter angle.Linear polarizer 2 light transmission shaft directions are 7, and the liquid crystal molecule projecting direction is 8.Fig. 3: during mode two in linearly polarized light device 2 light transmission shafts and liquid crystal light valve 4 the liquid crystal molecule projecting direction become to bear miter angle.Linear polarizer 2 light transmission shaft directions are 9, and the liquid crystal molecule projecting direction is 8.Fig. 4: the conversion schematic diagram of each optical states during the present invention single projector stereo projection apparatus work.
Operation logic and process:
Optical projection system consists of and light path is seen Fig. 1, comprising: projector 1, linear polarizer 2, synchronous circuit 3, liquid crystal light valve 4, screen 5, rotatory polarization glasses 6.Solid arrow is the light transmition direction.
Video input signals 1A be the left and right image alternately, alternate transmission is to projector successively, projector is converted into image with video input wire size 1A, penetrates from projector lens with the form of light, is converted into linearly polarized light 10 through after linear polarizer 2.
Mode for the moment, in linearly polarized light device 2 light transmission shafts and liquid crystal light valve 4, the liquid crystal molecule projecting direction becomes miter angle, sees Fig. 2.When left-eye image was transmitted, synchronous circuit 3 detected rate signals, produced simultaneously an ac high voltage signal, put on liquid crystal light valve 4, and liquid crystal light valve 4 retardations are remained on about 1/4 wavelength.Linearly polarized light 10 projects in screen 5 after being converted into right-circularly polarized light 11 after liquid crystal light valve 4.When eye image was transmitted, synchronous circuit 3 detected rate signals, produced simultaneously one and exchanged low voltage signal, put on liquid crystal light valve 4, and liquid crystal light valve 4 retardations are remained on about 3/4 wavelength.Linearly polarized light 10 projects in screen 5 after being converted into left circularly polarized light 12 after liquid crystal light valve 4.
During mode two, in linearly polarized light device 2 light transmission shafts and liquid crystal light valve 4, the liquid crystal molecule projecting direction becomes to bear miter angle, sees Fig. 3.When left-eye image was transmitted, synchronous circuit 3 detected rate signals, produced simultaneously an ac high voltage signal, put on liquid crystal light valve 4, and liquid crystal light valve 4 retardations are remained on about 1/4 wavelength.Linearly polarized light 10 projects in screen 5 after being converted into left circularly polarized light 12 after liquid crystal light valve 4.When eye image was transmitted, synchronous circuit 3 detected rate signals, produced simultaneously one and exchanged low voltage signal, put on liquid crystal light valve 4, and liquid crystal light valve 4 retardations are remained on about 3/4 wavelength.Linearly polarized light 10 projects in screen 5 after being converted into right-circularly polarized light 11 after liquid crystal light valve 4.
Viewers wear rotatory polarization glasses 6 are watched before screen 5, the right and left eyes of rotatory polarization glasses 6 is respectively left-handed rotatory polarization sheet and dextrorotation rotatory polarization sheet, therefore every eye can only be differentiated a kind of circularly polarized light, thereby make left eye and right eye see different projection images, realize that the right and left eyes image separates to realize the stereo display effect.
The relative position of linear polarizer 2, liquid crystal light valve 4 has dual mode, and mode one becomes miter angle for linearly polarized light device 2 light transmission shafts with liquid crystal molecule projecting direction in liquid crystal light valve 4, see Fig. 2; Mode two be linearly polarized light device 2 light transmission shafts with liquid crystal light valve 4 in the liquid crystal molecule projecting direction become to bear miter angle, see Fig. 3; Select during concrete enforcement Fig. 2 and Fig. 3 wherein any one.
Claims (5)
1. single projector stereo projection apparatus, it comprises projector, synchronous circuit, screen and rotatory polarization glasses;
Projector is used for video playback;
Linear polarizer is for generation of linearly polarized light;
Rotatory polarization glasses: wear when spectators watch projection, for separating of the right and left eyes image; It is characterized in that: it also comprises
Optics self compensation beam mode liquid crystal light valve is used for transferring linearly polarized light to left circularly polarized light or right-circularly polarized light;
Synchronous circuit is used for gathering from the video signal input terminal mouth frame rate signal of right and left eyes image, produces simultaneously the synchronous voltage signal that is used for driving liquid crystal light valve;
Before linear polarizer was positioned at projector lens, optics self compensation beam mode liquid crystal light valve was positioned at outside linear polarizer, and projector lens one side is inboard;
Video input signals divides the right and left eyes picture signal, and alternate transmission is to projector successively, and the light that projector sends projects to screen after passing through successively linear polarizer, optics self compensation beam mode liquid crystal light valve, wears the circular polarization glasses and watches screen;
Wherein, the thickness of liquid crystal layer of described optics self compensation beam mode liquid crystal light valve is less than or equal to 5 microns; The response time: 0.5 millisecond of rise time or below, 1.2 milliseconds of fall times or below;
Described synchronous circuit can produce two ac voltage signals: high voltage remains on 1/4 wavelength with the retardation of liquid crystal light valve; Low-voltage can remain on the retardation of liquid crystal light valve 3/4 wavelength.
2. stereo projection apparatus according to claim 1, it is characterized in that: described linear polarizer, liquid crystal light valve and synchronous circuit can be used as the outside extention of common projector, also can be built in projector inside.
3. according to stereo projection apparatus according to claim 1, it is characterized in that: linearly polarized light device light transmission shaft becomes with liquid crystal molecule projecting direction in liquid crystal light valve that in miter angle or linearly polarized light device light transmission shaft and liquid crystal light valve, the liquid crystal molecule projecting direction becomes to bear miter angle.
4. stereo projection apparatus according to claim 1, it is characterized in that: described rotatory polarization glasses left eye and right eye polarizer are respectively Left-hand circular polarization sheet and right-hand circular polarization sheet, and left eye polarizer and right eye polarizer are commutative.
5. stereo projection apparatus according to claim 1, it is characterized in that: high-tension value is between 3V to 10V; The value of low-voltage is between 0V to 3V.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010101317858A CN101790062B (en) | 2010-03-25 | 2010-03-25 | Stereoprojection device of single projector with single liquid crystal light valve |
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| CN2010101317858A CN101790062B (en) | 2010-03-25 | 2010-03-25 | Stereoprojection device of single projector with single liquid crystal light valve |
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| CN101790062B true CN101790062B (en) | 2013-05-08 |
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| CN102566249B (en) * | 2012-01-06 | 2014-10-15 | 深圳秋田微电子有限公司 | Stereo projection system with single projector and dual liquid crystal light valves, projector and driving method |
| CN102540696B (en) * | 2012-01-06 | 2015-07-22 | 深圳秋田微电子有限公司 | Single projector type stereoscopic projection system, projector and driving method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5898520A (en) * | 1997-02-11 | 1999-04-27 | Raytheon Company | Three-dimensional imaging system having a polarizing filter |
| CN1464988A (en) * | 2001-06-08 | 2003-12-31 | 索尼公司 | Display unit, position adjusting pattern display program, recording medium, polarization glasses, and filter position adjusting method for display unit |
| WO2006135867A2 (en) * | 2005-06-10 | 2006-12-21 | Colorlink, Inc. | Three dimensional stereoscopic projection architectures |
| CN101183177A (en) * | 2007-12-13 | 2008-05-21 | 友达光电股份有限公司 | Steroscopic display and manufacturing method thereof |
| CN101548219A (en) * | 2006-11-06 | 2009-09-30 | 马斯特图像有限公司 | Stereoscopic image projecting system using circularly polarized filter module |
-
2010
- 2010-03-25 CN CN2010101317858A patent/CN101790062B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5898520A (en) * | 1997-02-11 | 1999-04-27 | Raytheon Company | Three-dimensional imaging system having a polarizing filter |
| CN1464988A (en) * | 2001-06-08 | 2003-12-31 | 索尼公司 | Display unit, position adjusting pattern display program, recording medium, polarization glasses, and filter position adjusting method for display unit |
| WO2006135867A2 (en) * | 2005-06-10 | 2006-12-21 | Colorlink, Inc. | Three dimensional stereoscopic projection architectures |
| CN101548219A (en) * | 2006-11-06 | 2009-09-30 | 马斯特图像有限公司 | Stereoscopic image projecting system using circularly polarized filter module |
| CN101183177A (en) * | 2007-12-13 | 2008-05-21 | 友达光电股份有限公司 | Steroscopic display and manufacturing method thereof |
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