CN201681249U - Stereoscopic projection device with double liquid crystal light valve and single projector - Google Patents
Stereoscopic projection device with double liquid crystal light valve and single projector Download PDFInfo
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- CN201681249U CN201681249U CN2010201403098U CN201020140309U CN201681249U CN 201681249 U CN201681249 U CN 201681249U CN 2010201403098 U CN2010201403098 U CN 2010201403098U CN 201020140309 U CN201020140309 U CN 201020140309U CN 201681249 U CN201681249 U CN 201681249U
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Abstract
The utility model relates to a stereoscopic projection device with double liquid crystal light valves and a single projector. The stereoscopic projection device comprises a projector, a linear polarizer, two liquid crystal light valves, a synchronous circuit, a screen and circular polarizing glasses. The linear polarizer is arranged at the front of the lens of the projector. A first optical self-compensating bending mode liquid crystal light valve is arranged on the external side of the linear polarizer. One side of the lens of the projector is an internal side. A second optical self-compensating bending mode liquid crystal light valve is arranged on the external side of the first optical self-compensating bending mode liquid crystal light valve. Video input signals are divided into left eye image signals and right eye image signals which are sequentially and alternately transmitted to the screen. Light rays emitted by the projector sequentially pass through the linear polarizer, the first liquid crystal light valve and the second liquid crystal light valve and are projected onto the screen. Audience can wear the polarizing glasses to watch the screen. The utility model has the advantages of simple structure, simple circuit and low cost and overcomes the trouble in the alignment of images projected by two projectors. By using one projector which collaborates with the two liquid crystal light valves and the supporting circuit, the audience can watch stereoscopic projections after the audience wear the polarizing glasses.
Description
Technical field
The utility model relates to stereo projection apparatus, and particularly a kind of three-dimensional projecting apparatus with double liquid crystal light valves and single projector utilizes two liquid crystal light valves of projector's collocation and rotatory polarization glasses to realize the stereoprojection effect.
Background technology
Existing two projectors of stereo projection technology general using, install fixing Left-hand circular polarization device and right-hand circular polarization device before two camera lenses respectively additional, light is converted into Left-hand circular polarization and right-circularly polarized light, two projectors are projected in the screen simultaneously, can watch stereopsis behind the viewers wear circular polarizing disk glasses.This kind mode needs two accurate contrapositions of projector, to guarantee the accuracy of projected position, uses two projectors simultaneously, and cost is higher.
Summary of the invention
The purpose of this utility model is to provide a kind of three-dimensional projecting apparatus with double liquid crystal light valves and single projector, by liquid crystal light valve control polarized state of light, has realized the mode of separate unit projector project stereoscopic image.Realized the mode of separate unit projector project stereoscopic image, than the stereo projection apparatus of dual-projection machine, the utility model is simple in structure, and circuit is simple, and cost is low, need not to consider two projectors projected image contraposition problem.Utilize two liquid crystal light valves of projector's collocation and support circuit, spectators can watch the stereoprojection effect by wearing the rotatory polarization glasses.
The two light valve list projector stereo projection apparatus that the utility model provides comprises projector, polarizer, synchronizing circuit, two optics self compensation beam mode liquid crystal light valves, screen and rotatory polarization glasses:
Projector is used to support that frame rate is 100HZ or higher video playback; Adopt DLP technology, LCOS technology, LCD technology etc.
Linear polarizer is used to produce linearly polarized light; Adopt degree of polarization to be higher than 99% the polaroid or the line polarizing device of other same functions.
Two optics self compensation beam mode liquid crystal light valves are used for transferring linearly polarized light to left circularly polarized light or right-circularly polarized light;
Synchronizing circuit: be used for gathering from the video signal input terminal mouth frame rate signal of right and left eyes image, two signals alternately input to projector and are projected to screen.Produce the sync waveform signal that is used to drive liquid crystal light valve simultaneously;
Polaroid glasses: be the line polaroid glasses, the right and left eyes polaroid light transmission shaft direction of line polaroid glasses is vertical mutually;
Before linear polarizer is positioned at projector lens, first optics self compensation beam mode liquid crystal light valve is positioned at the linear polarizer outside (projector lens one side is for inboard), and second optics self compensation beam mode liquid crystal light valve is positioned at first optics self compensation beam mode liquid crystal light valve outside (projector lens one side is for inboard).
Video input signals divides the right and left eyes picture signal, and alternate transmission is given projector successively, and the light that projector sends projects to screen after passing through linear polarizer, first liquid crystal light valve, second liquid crystal light valve successively, wears the circular polarization glasses and watches screen.
Screen: common screen or metal screen.
Rotatory polarization sheet glasses: the right and left eyes of rotatory polarization sheet glasses is respectively left-handed rotatory polarization sheet and dextrorotation rotatory polarization sheet.
Described linear polarizer, liquid crystal light valve, synchronizing circuit can be used as the outside extention of common projector, also can be built in projector inside.
Optics self compensation beam mode (is an ocb mode, also claiming the π box) thickness of liquid crystal layer is less than or equal to 5 microns in first liquid crystal light valve and second liquid crystal light valve, characteristics with quick response, 0.8 millisecond of general rise time or below, 1.5 milliseconds of fall times or below.
The long axis of liquid crystal molecule projecting direction becomes 45 degree or negative 45 degree in first liquid crystal light valve with linear polarizer 2 polarization directions.The long axis of liquid crystal molecule projecting direction is vertical mutually in second liquid crystal light valve 5 and first liquid crystal light valve, and the particular location relation is seen Fig. 2 and Fig. 3.
Synchronizing circuit 3 can produce two voltage signal A and B, and A and B are added in respectively on first liquid crystal light valve and second liquid crystal light valve at one time, and promptly when institute's making alive was A on first liquid crystal light valve, second liquid crystal light valve institute making alive was B; When institute's making alive was B on first liquid crystal light valve, institute's making alive was A on second liquid crystal light valve.
A is a high voltage in the voltage signal that synchronizing circuit 3 produces, and generally is higher than 10V; B is the appropriate voltage that is lower than 10V, magnitude of voltage is generally between the 3V to 10V, typical case's high-voltage value is 6V to 7V, and the retardation that is used to keep first liquid crystal light valve or second liquid crystal light valve is about 1/4 wavelength, and concrete voltage depends on factors such as the parameter of liquid crystal material own.
Synchronizing circuit can be detected the rate signals of the right and left eyes image of video inputs, and when the right and left eyes image was changed, voltage signal A that synchronizing circuit produces and B did timed delivery and replace.
Left eye and right eye are respectively left-handed rotatory polarization sheet and dextrorotation rotatory polarization sheet in the described circular polarization glasses, and the right and left eyes polaroid is commutative on the glasses.
The utility model provides a kind of three-dimensional projecting apparatus with double liquid crystal light valves and single projector, by liquid crystal light valve control polarized state of light, realized the mode of separate unit projector project stereoscopic image, stereo projection apparatus than the dual-projection machine, the utility model is simple in structure, circuit is simple, and cost is low, need not to consider two projectors projected image contraposition problem.Utilize two liquid crystal light valves of projector's collocation and support circuit, spectators can watch the stereoprojection effect by wearing the rotatory polarization glasses.
Description of drawings:
Fig. 1: three-dimensional projecting apparatus with double liquid crystal light valves and single projector constitutes and light path.
Fig. 2: the relative position relation one of linear polarizer 2, liquid crystal light valve 4 and liquid crystal light valve 5.
Fig. 3: the relative position relation two of linear polarizer 2, liquid crystal light valve 4 and liquid crystal light valve 5.
Fig. 4: the relative position relation of linear polarizer 2, liquid crystal light valve 4 and liquid crystal light valve 5 is the acquisition of right-circularly polarized light for the moment.
Fig. 5: the relative position relation of linear polarizer 2, liquid crystal light valve 4 and liquid crystal light valve 5 is the acquisition of left circularly polarized light for the moment.
Fig. 6: the acquisition of left circularly polarized light during the relative position relation two of linear polarizer 2, liquid crystal light valve 4 and liquid crystal light valve 5.
Fig. 7: the acquisition of right-circularly polarized light during the relative position relation two of linear polarizer 2, liquid crystal light valve 4 and liquid crystal light valve 5.
Embodiment
The utility model is described in detail as follows with reference to accompanying drawing:
Fig. 1: this three-dimensional projecting apparatus with double liquid crystal light valves and single projector constitutes and light path, and solid arrow is an optical propagation direction.
Fig. 2: the relative position relation one of linear polarizer 2, liquid crystal light valve 4 (first liquid crystal light valve) and liquid crystal light valve 5 (second liquid crystal light valve).Device 2 polarization directions in linear polarization side's are 8, and liquid crystal light valve 4 long axis of liquid crystal molecule projecting directions are 9, and liquid crystal light valve 5 long axis of liquid crystal molecule projecting directions are 10.Direction 9 and direction 8 angles 45 degree, direction 9 is vertical with direction 10.
Fig. 3: the relative position relation two of linear polarizer 2, liquid crystal light valve 4 and liquid crystal light valve 5.Device 2 polarization directions in linear polarization side's are 8, and liquid crystal light valve 4 long axis of liquid crystal molecule projecting directions are 10, and liquid crystal light valve 5 long axis of liquid crystal molecule projecting directions are 9, direction 9 and direction 8 angles 45 degree, and direction 9 is vertical with direction 10.
Fig. 4: the relative position relation of linear polarizer 2, liquid crystal light valve 4 and liquid crystal light valve 5 is the acquisition of right-circularly polarized light for the moment.4 making alives of liquid crystal light valve are A, and 5 making alives of liquid crystal light valve are B.
Fig. 5: the relative position relation of linear polarizer 2, liquid crystal light valve 4 and liquid crystal light valve 5 is the acquisition of left circularly polarized light for the moment.4 making alives of liquid crystal light valve are B, and 5 making alives of liquid crystal light valve are A.
Fig. 6: the acquisition of left circularly polarized light during the relative position relation two of linear polarizer 2, liquid crystal light valve 4 and liquid crystal light valve 5.4 making alives of liquid crystal light valve are A, and 5 making alives of liquid crystal light valve are B.
Fig. 7: the acquisition of right-circularly polarized light during the relative position relation two of linear polarizer 2, liquid crystal light valve 4 and liquid crystal light valve 5.4 making alives of liquid crystal light valve are B, and 5 making alives of liquid crystal light valve are A.
Operation logic and process:
This three-dimensional projecting apparatus with double liquid crystal light valves and single projector utilizes two optical polarization states that are superimposed on liquid crystal light valve control projector output light together, right and left eyes image alternating projection successively arrives screen, utilize the circular polarizing disk glasses with the right and left eyes separation of images again, thereby realize stereoscopic visual effect.
The desired video input signals 1A of this three-dimensional projecting apparatus with double liquid crystal light valves and single projector is divided into left-eye image and eye image, and left-eye image and eye image cycle alternation are transferred to projector 1.
The light that sends from projector 1 becomes linearly polarized light 11 through behind the linear polarizer 2, and its polarization direction is consistent with linear polarization 2 polarization directions.
Liquid crystal light valve 4 and 5 all adopts ocb mode liquid crystal light valve (OCB is an optics self compensation beam mode, also claims the π box), and box is thick to be less than or equal to 5 microns, has the characteristics of quick response, 0.8 millisecond of general rise time or below, 1.5 milliseconds of fall times or below.The characteristics of the quick response of ocb mode liquid crystal light valve can guarantee that this projection arrangement exports the optical polarization state of light and do corresponding transformation when image switches at a high speed.
The polarization direction angle of long axis of liquid crystal molecule projecting direction and polarizer 2 is 45 degree or negative 45 degree in the liquid crystal light valve 4.The long axis of liquid crystal molecule projecting direction is vertical with long axis of liquid crystal molecule projecting direction in the liquid crystal light valve 4 in the liquid crystal light valve 5.The array mode that is long axis of liquid crystal molecule projecting direction in long axis of liquid crystal molecule projecting direction in the polarization direction, liquid crystal light valve 4 of polarizer 2, the liquid crystal light valve 5 has two kinds, sees Fig. 2 and Fig. 3, selects wherein any one mode when specifically implementing.
The relative position relation of linear polarizer 2, liquid crystal light valve 4 and liquid crystal light valve 5 is seen Fig. 2 for the moment, and this optical projection system working method is as follows:
State one: see Fig. 4, when adding high voltage A on the liquid crystal light valve 4, the residual retardance amount of liquid crystal light valve 4 does not have modulating action near zero to polarized light.Linearly polarized light 11 is through liquid crystal light valves 4 and the optical polarization state does not change.Institute's making alive is B on the liquid crystal light valve 5 at this moment, and the retardation of liquid crystal light valve 5 is about 1/4 wavelength, and this moment, liquid crystal light valve 5 effects were equivalent to quarter wave plate.Linearly polarized light 11 becomes right-circularly polarized light 12 through behind the liquid crystal light valve 5.
State two: see Fig. 5, when institute's making alive was B on the liquid crystal light valve 4, the retardation of liquid crystal light valve 4 was about 1/4 wavelength, and this moment, liquid crystal light valve 4 effects were equivalent to quarter wave plate, and linearly polarized light 11 becomes left circularly polarized light 13 through behind the liquid crystal light valve 4.Institute's making alive is A on the liquid crystal light valve 5 at this moment, and the residual retardance amount of liquid crystal light valve 5 does not have modulating action near zero to polarized light, still is left circularly polarized light 13 behind the left circularly polarized light 13 process liquid crystal light valves 5.
When the video input signals image is transformed into eye image by left-eye image or is transformed into left-eye image by eye image, synchronizing circuit 3 control output voltage signal A and B, state one and state two are done corresponding switching, guaranteeing separating of left-eye image and eye image, and maintenance and video input signals 1A frame frequency are synchronous.
During the relative position relation two of linear polarizer 2, liquid crystal light valve 4 and liquid crystal light valve 5, see Fig. 3, this optical projection system working method is as follows:
State one: see Fig. 6, when adding high voltage A on the liquid crystal light valve 4, the residual retardance amount of liquid crystal light valve 4 does not have modulating action near zero to polarized light.Linearly polarized light 11 is through liquid crystal light valves 4 and the optical polarization state does not change.Institute's making alive is B on the liquid crystal light valve 5 at this moment, and the retardation of liquid crystal light valve 5 is about 1/4 wavelength, and this moment, liquid crystal light valve 5 effects were equivalent to quarter wave plate.Linearly polarized light 11 becomes left circularly polarized light 13 through behind the liquid crystal light valve 5.See figure
State two: see Fig. 7, when institute's making alive was B on the liquid crystal light valve 4, the retardation of liquid crystal light valve 4 was about 1/4 wavelength, and this moment, liquid crystal light valve 4 effects were equivalent to quarter wave plate, and linearly polarized light 11 becomes right-circularly polarized light 12 through behind the liquid crystal light valve 4.Institute's making alive is A on the liquid crystal light valve 5 at this moment, and the residual retardance amount of liquid crystal light valve 5 does not have modulating action near zero to polarized light, still is right-circularly polarized light 12 behind the right-circularly polarized light 12 process liquid crystal light valves 5.
When the image of video input signals is transformed into eye image or eye image and is transformed into left-eye image by left-eye image, synchronizing circuit 3 control output voltage signal A and B, state one and state two are done corresponding switching, guaranteeing separating of left-eye image and eye image, and maintenance and video input signals 1A frame frequency are synchronous.
Change synchronously by the vision signal that the right and left eyes with input separates, divide the time to project in the screen successively according to left circularly polarized light or right-circularly polarized light respectively the right and left eyes image.Before spectators are positioned at screen 6, wear rotatory polarization glasses 7, right and left eyes is respectively left-handed rotatory polarization sheet and dextrorotation rotatory polarization sheet, and right and left eyes can only be differentiated a kind of in left circularly polarized light or the right-hand circular polarization light image separately.Thereby realize separating of left eye influence and right-eye image, realize the stereo display effect.
Claims (8)
1. three-dimensional projecting apparatus with double liquid crystal light valves and single projector is characterized in that comprising:
Projector is used to support that frame rate is 100HZ or higher video playback;
Linear polarizer is used to produce linearly polarized light;
Two optics self compensation beam mode liquid crystal light valves are used for transferring linearly polarized light to left circularly polarized light or right-circularly polarized light;
Synchronizing circuit: be used for gathering the frame rate signal of right and left eyes image, produce the synchronous voltage signal that is used to drive liquid crystal light valve simultaneously from the video signal input terminal mouth;
Polaroid glasses: be the line polaroid glasses, the right and left eyes polaroid light transmission shaft direction of line polaroid glasses is vertical mutually;
Before linear polarizer is positioned at projector lens, first optics self compensation beam mode liquid crystal light valve is positioned at the linear polarizer outside, projector lens one side is inboard, second optics self compensation beam mode liquid crystal light valve is positioned at first optics self compensation beam mode liquid crystal light valve outside, and projector lens one side is inboard.
2. stereo projection apparatus according to claim 1 is characterized in that: described linear polarizer, liquid crystal light valve, synchronizing circuit can be used as the outside extention of common projector, also can be built in projector inside.
3. stereo projection apparatus according to claim 1 is characterized in that: thickness of liquid crystal layer is less than or equal to 5 microns in first liquid crystal light valve and second liquid crystal light valve; Response time: 0.8 millisecond of rise time or below, 1.5 milliseconds of fall times or below.
4. stereo projection apparatus according to claim 1 is characterized in that: the long axis of liquid crystal molecule projecting direction becomes 45 degree or negative 45 degree in first liquid crystal light valve with linear polarizer (2) polarization direction; The long axis of liquid crystal molecule projecting direction is vertical mutually in second liquid crystal light valve and first liquid crystal light valve.
5. stereo projection apparatus according to claim 1, it is characterized in that: synchronizing circuit can produce two voltage signal high voltage A and low-voltage B, A and B are added in respectively on first liquid crystal light valve and second liquid crystal light valve at one time, promptly when institute's making alive was A on first liquid crystal light valve, second liquid crystal light valve institute making alive was B; When institute's making alive was B on first liquid crystal light valve, institute's making alive was A on second liquid crystal light valve.
6. stereo projection apparatus according to claim 5 is characterized in that: described high voltage is higher than 10V; Low-voltage is 3V to 10V.
7. stereo projection apparatus according to claim 5 is characterized in that: the rate signals of the right and left eyes image of synchronizing circuit detecting video inputs, when the right and left eyes image was changed, voltage signal A that synchronizing circuit produces and B did timed delivery and replace.
8. stereo projection apparatus according to claim 1 is characterized in that left eye and right eye are respectively left-handed rotatory polarization sheet and dextrorotation rotatory polarization sheet in the described polaroid glasses, and the right and left eyes polaroid is commutative on the glasses.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201403098U CN201681249U (en) | 2010-03-25 | 2010-03-25 | Stereoscopic projection device with double liquid crystal light valve and single projector |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010201403098U CN201681249U (en) | 2010-03-25 | 2010-03-25 | Stereoscopic projection device with double liquid crystal light valve and single projector |
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| CN201681249U true CN201681249U (en) | 2010-12-22 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102621795A (en) * | 2012-04-28 | 2012-08-01 | 赵金宝 | Three-dimensional imaging device |
| CN109856887A (en) * | 2019-04-02 | 2019-06-07 | 合肥工业大学 | A kind of squeezed light field display system and its lightfield compression algorithm based on liquid crystal light valve |
-
2010
- 2010-03-25 CN CN2010201403098U patent/CN201681249U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102621795A (en) * | 2012-04-28 | 2012-08-01 | 赵金宝 | Three-dimensional imaging device |
| CN109856887A (en) * | 2019-04-02 | 2019-06-07 | 合肥工业大学 | A kind of squeezed light field display system and its lightfield compression algorithm based on liquid crystal light valve |
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Owner name: SHENZHEN TIME WAYING TECHNOLOGY DEVELOPMENT CO., L Free format text: FORMER OWNER: HEBEI UNIVERSITY OF TECHNOLOGY Effective date: 20110713 |
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Effective date of registration: 20121231 Address after: 518000 Guangdong city of Shenzhen province Nanshan District Qiaoxiang Road East High Technology Park No. 1 plant (2-C branch) -8 Patentee after: Shenzhen flying DIO Electronics Co., Ltd. Address before: 518034 Shenzhen city Futian District Xiangmei road Jialong Xingyuan B-1306 Patentee before: Shenzhen Era Huaying Technology Development Co., Ltd. |
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Assignee: Shenzhen city Aibidu Technology Co. Ltd. Assignor: Shenzhen Era Huaying Technology Development Co., Ltd. Contract record no.: 2013440020089 Denomination of utility model: Three-dimensional projecting apparatus with double liquid crystal light valves and single projector Granted publication date: 20101222 License type: Common License Record date: 20130321 |
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Effective date of registration: 20131029 Address after: 518000, No. 9, No. 1007, building 10, high tech, central high tech Zone, Shenzhen, Guangdong, Nanshan District Patentee after: Shenzhen Era Huaying Technology Development Co., Ltd. Address before: 518000 Guangdong city of Shenzhen province Nanshan District Qiaoxiang Road East High Technology Park No. 1 plant (2-C branch) -8 Patentee before: Shenzhen flying DIO Electronics Co., Ltd. |
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Owner name: SHENZHEN SHIDAI HUAYING TECHNOLOGY CO., LTD. Free format text: FORMER NAME: SHENZHEN TIME WAYING TECHNOLOGY DEVELOPMENT CO., LTD. |
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Address after: 518000, No. 9, No. 1007, building 10, high tech, central high tech Zone, Shenzhen, Guangdong, Nanshan District Patentee after: Shenzhen Shidai Huaying Technology Co., Ltd. Address before: 518000, No. 9, No. 1007, building 10, high tech, central high tech Zone, Shenzhen, Guangdong, Nanshan District Patentee before: Shenzhen Era Huaying Technology Development Co., Ltd. |
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Address after: 518000 Guangdong province Shenzhen city Nanshan District high tech Zone in a central high road No. 9 Building 10 room 1007 software business premises Xueyuan Road No. 1001 Nanshan building C2 room 22 Istana Patentee after: Shenzhen Shidai Huaying Technology Co., Ltd. Address before: 518000, No. 9, No. 1007, building 10, high tech, central high tech Zone, Shenzhen, Guangdong, Nanshan District Patentee before: Shenzhen Shidai Huaying Technology Co., Ltd. |
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Address after: 518000 Guangdong province Shenzhen city Nanshan District high tech Zone in a central high road No. 9 Building 10 room 1007 software business premises Xueyuan Road No. 1001 Nanshan Chi Park building C2 room 22 Patentee after: Shenzhen Shidai Huaying Technology Co., Ltd. Address before: 518000 Guangdong province Shenzhen city Nanshan District high tech Zone in a central high road No. 9 Building 10 room 1007 software business premises Xueyuan Road No. 1001 Nanshan building C2 room 22 Istana Patentee before: Shenzhen Shidai Huaying Technology Co., Ltd. |
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Granted publication date: 20101222 |