CN1083299A - Time-division colour three-D TV image optical synchronous signal and light valve of liquid crystal glasses drive method - Google Patents
Time-division colour three-D TV image optical synchronous signal and light valve of liquid crystal glasses drive method Download PDFInfo
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- CN1083299A CN1083299A CN 92110176 CN92110176A CN1083299A CN 1083299 A CN1083299 A CN 1083299A CN 92110176 CN92110176 CN 92110176 CN 92110176 A CN92110176 A CN 92110176A CN 1083299 A CN1083299 A CN 1083299A
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Abstract
A kind of time-division colour three-D TV image optical synchronous signal and light valve of liquid crystal glasses drive method.Two gamma cameras carry out synchronously and export colour-video signal to analog switch in the emission system, the two-way optical synchronous signal is added to analog switch, and wherein strange, even identification signal is extracted and produced to a gamma camera output signal through penetrating with the laggard every trade of isolation, field signal simultaneously; The shutoff of the left and right eyeglass of liquid crystal light valve driver control liquid crystal glasses in the receiving system makes people's images of left and right eyes can only see that the right side of scenery is looked, left seeing image resembles, thereby forms the stereo image of the scenery that absorbs at human brain.It is easy to operate, practical.
Description
The present invention relates to a kind of time-devision system optical synchronous signal and light valve of liquid crystal glasses driving method that produces stereo images of colour TV.
Almost in the invention color TV, people have just begun the research of stereoscopic TV.Although up to the present carried out nearly 40 years research, owing to the difficulty that has run into such as aspects such as record, transmission and demonstrations, the research of stereoscopic TV does not also obtain the result of satisfied and practicability.In numerous stereoscopic TV methods of Ti Chuing, more typically have following several in recent years:
1. two-way method for making, this method is to use the stereo-television system of two gamma cameras, two video channels, two display monitor central monitoring systems.Synthesize two-way method for making etc. comprising polarisation two-way method for making, beam split two-way method for making, projection two-way method for making and prism.The advantage of two-way method for making is to obtain image quality preferably, stronger depth perception.Shortcoming is to need the twice video bandwidth to transmit, and the number and the angle of generally watching are restricted.
2. duochrome method, these class methods generally adopt video output the carry out D encoding of color television encoding device to two gamma cameras about in the three-dimensional camera system, overcome crosstalking of left and right sides two-way image because this method is difficult, cause the depth perception of stereo image to be suffered a loss greatly.In addition, the goggles with color filter that is used to separate left and right sides two-way image is because undesirable also can the making of spectrum design observed easily generation visual fatigue, and the color of stereo image also can incur loss simultaneously.
In view of the two-way method for making of stereo images of colour TV and the above-mentioned shortcoming of duochrome method existence, MAXWELL in 1985 have proposed the liquid crystal light valve control method of color solid TV, and this method is to place the camera lens of two mock inspection person images of left and right eyes in TV camera the place ahead of routine.Video from each camera lens passes through a liquid crystal light valve respectively, arrives gamma camera through speculum then.Utilize and the synchronous pulse of TV field signal again, two light valves are are alternately opened and closed, make video arrive gamma camera respectively at odd field and even field from left side and right side camera lens, so the output signal of gamma camera then is made up of left tv scene when odd field, when even field, then form by right tv scene.The signal of gamma camera is still handled in a usual manner, is transmitted and records.
In addition, do vertical polarization in the time of need adopting a LCD screen to make light from picture tube at the receiver place at odd field, when even field, make horizontal polarization, spectators put on the polaroid glasses of left eyeglass vertical polarization, right eyeglass horizontal polarization again, spectators' left eye is seen like this is that the left seeing image of tv scene resembles, and what right eye was seen then is that right seeing image resembles.Although left seeing image resembles with right seeing image and resembles the eyes that are not to arrive simultaneously the intelligent, according to people's eye storage characteristic, spectators can see the stereo image that depth perception is arranged.
The employed system of said method that MAXWELL proposes can be with the prevailing system compatibility.But needing to adopt the larger area liquid crystal light valve in this method is that original receiving system need be done bigger change, and especially the automatically controlled polarisation liquid crystal display screen before the video screen is difficult to realize on technology.This also may to be this method up to today still fail reason of practicability.In addition, in the liquid crystal light valve control method of MAXWELL before the gamma camera added optical system to the loss of light big (light loss＞75%), and the convergent angle of the two gamma cameras of equivalence, baseline etc. all can not be adjusted in shooting process, and therefore the visual angle of gamma camera also is affected.
The purpose of this invention is to provide a kind of easy and simple to handlely, practical, emission, receiving system do not have the color TV stereo image method of big change, to overcome the shortcoming of prior art.
Of the present invention theing contents are as follows: in emission system (I), adopt two gamma cameras (1) (2) that scenery is taken synchronously, and make its convergent angle, distance between axles, the angle of pitch, the level height synchronous adjustable, the two-way colour-video signal of two gamma cameras (1) (2) output through penetrate with, be added to the input 11 of multiway analog switch (5) behind the clamp respectively, 15 pin, and the two paths of signals that optical synchronous signal generator (6) produces is added to the input 12 of analog switch (5), 14 pin, an output signal in two gamma cameras (1) (2) is through penetrating with carrying out after isolating synchronously and the field sync signal extraction simultaneously, the row that produces, field signal is input to phase discriminator (7), make phase discriminator (7) output strange, the idol identification signal is to control end 10 pin of analog switch (5), OK, field signal also is input to row, in the field optical signal controller (8), it produces control end 9 pin that control signal is added to analog switch (5), the control end 10 of analog switch (5), one group of four road input 11 in two groups of the common controls of 9 pin itself, 12,14, the through and off of 15 pin, thereby make 13 pin carry out time-division transmission and produce the stereo image that has optical synchronous signal, simultaneously by analog switch (5) control end 10, another organizes four road inputs 19 foot control systems, 2,4,5 pin, make 1 and 2 pin, 4 with after 5 pin link to each other respectively, the square wave that low-frequency oscillator (9) is produced is input to 1 again, 2 pin, and this square-wave signal is added to 4 after anti-phase, 5 pin, 1,2 pin and liquid crystal glasses g
1Left side eyeglass links to each other, and 4,5 pin then connect its right eyeglass, and analog switch (5) output 3 pin meet liquid crystal glasses g
1Public output.The color video output signal is through penetrating with input 11,15 pin that are added to multiway analog switch (5) behind, the clamp respectively, be in order to produce video switch, make video switch be subjected to control strange, even field identification signal, and optical synchronous signal is added to input 12,14 pin of analog switch (5) is in order to produce optical synchronous signal, this optical synchronous signal is subjected to optical synchronous signal generator (6) control, when odd field, produce low level, when even field, produce high level.In the analog switch (5) 1 links to each other with 5 pin with 2 pin, 4, is in order to guarantee control end 9 pin signal at all events, to realize 1,2 pin of its another group of 10 foot control system or the break-make of 4,5 pin.The square-wave signal purpose that low-frequency oscillator (9) produces 1KHZ is to make liquid crystal glasses g
1Carry out bipolar triggering, in order to prolonging liquid crystal glasses g
1Useful life, public output 3 pin meet liquid crystal glasses g
1Public output is in order to control the normal polarity of square wave.Photelectric receiver (14) receives the photoelectric synchronous signal that video screen sends in the receiving system (II), the signal of noting is amplified through shaping amplifier (15) shaping, after postponing, pulse stretcher (16) broadening, delayer (17) be added to control end 10 pin of analog switch (18).Make the control end 10 foot control systems of analog switch (18) itself meet liquid crystal glasses g
2Public output.It is in order to improve the stability of signal that photelectric receiver (14) amplifies the signal shaping that receives, pulse stretching be make burst pulse in addition broadening, idol strange to obtain look level signal, delay is for the stereo image of glasses switch and generation is synchronous.The liquid crystal light valve drive unit of being made up of photelectric receiver (14), shaping amplifier (15), pulse stretcher (16), delayer (17), simulator (18), low-frequency oscillator (19) and inverter (20) produces one with the synchronous drive signal of field signal, and light valve is synchronously moved with the field signal in the vision signal.Liquid crystal glasses g during odd field
1Left eyeglass be in closed condition, and the state of two eyeglasses is just in time opposite during even field.At this moment see through liquid crystal glasses g
2Watch screen to submit for the image that shows, spectators' left eye can only see that the right view of scenery resembles, and right eye can only see that the left seeing image of scenery resembles.According to the eye storage characteristic of human eye, spectators just can form the three-dimensional stereo image of subject in brain.
Pitching, the horizontal level of the angle of convergence of two gamma cameras 1,2, between centers road distance and every gamma camera can be regulated in the stereo image shooting process, so that obtain best stereoeffect.
The present invention has following advantage:
The system that this method adopted can with existing television transmission and receiving system compatibility.The emission system that is adopted (I) does not need to do any change, and receiver does not need to do any change or does very little change and just can use.For example need not do any change, get final product and draw a vision signal before need only the colour decoder in television set for the receiver that does not have video output for the receiver that video output is arranged.
2. this method adopted, and to look tool simple, is high speed liquid crystal shutter glasses, and the cost of these glasses and drive unit thereof only is about 1/10th of color television set sale price, and is practical.
3. this method can guarantee the color rendition degree and the image definition height of system.
4. this method is easy to operate, and the combination of the system that is adopted has flexibility, for example connecting line relevant in the system is disconnected, and two gamma cameras (1) (2) in the system just can continue to use as two general TV camera.
Fig. 1 is for realizing the system in combination schematic diagram of this method.
Fig. 2 is placed in schematic diagram on the three-dimensional The Cloud Terrace (3) for two gamma cameras (1) (2) in this method.
The employed three-dimensional The Cloud Terrace of this method (3) is made up of A-frame (31), support body (32) and vertical pivot (33).Each affixed vertical edge of support body (32) two ends, laterally parallel therebetween three cross sliding shafts (321), two balladeur trains (322) of being equipped with are set on slide-bar (321) and go up and can slide thereon, also be provided with the scalable luffing mechanism on the balladeur train (322) and horizontally rotate mechanism, two gamma cameras (1) (2) are laid thereon respectively.Vertical pivot (33) lower end that is fixed in support body (32) center bottom vertically penetrates in the through hole of A-frame (31) top middle portion, can be at this through hole along 360 ° of rotation of horizontal plane, and can move up and down.Like this, two gamma cameras (1) (2) can carry out the adjusting of convergent angle, distance between axles, the angle of pitch and horizontal level in three-dimensional The Cloud Terrace (3).The two-way colour-video signal of two gamma cameras (1) (2) output all is input in the clamper (12) through emitter follower (10) (11) respectively.Wherein the signal of an output is also penetrated with isolation through emitter follower (21), goes synchronously and the field sync signal extraction with sync separator and integrator (23) through sync separator and trigger (22) respectively again.After inverter (13) is anti-phase, be added to analog switch (5) 4,5 pin at emission system (I) medium and low frequency oscillator (9); Photelectric receiver (14) amplifies the photoelectric synchronous signal noted through shaping amplifier (15) shaping in receiving system (II), and stretcher (16) broadening is added to control end 10 pin of multiway analog switch (18) after delayer (17) postpones.The square-wave signal of low-frequency oscillator (19) output is anti-phase through inverter (20).
Claims (8)
1, a kind of time-division colour three-D TV image optical synchronous signal and light valve of liquid crystal glasses drive method, it is characterized in that in emission system (I), adopting two gamma cameras (1) (2) that scenery is taken synchronously, and make its convergent angle, distance between axles, the angle of pitch, the level height synchronous adjustable, the two-way colour-video signal of two gamma cameras (1) (2) output through penetrate with, be added to the input 11 of multiway analog switch (5) behind the clamp respectively, 15 pin, and the two paths of signals that optical synchronous signal generator (6) produces is added to the input 12 of analog switch (5), 14 pin, an output signal in two gamma cameras (1) (2) is through penetrating with isolating the synchronous and field sync signal extraction of laggard every trade simultaneously, the row that produces, field signal is input to phase discriminator (7), make phase discriminator (7) output strange, the idol identification signal is to control end 10 pin of analog switch (5), OK, field signal also is input to row, in the field optical signal controller (8), it produces control end 9 pin that control signal is added to analog switch (5), the control end 10 of analog switch (5), one group of four road input 11 in two groups of the common controls of 9 pin itself, 12,14, the through and off of 15 pin, thereby make 13 pin carry out time-division transmission and produce the stereo image that has optical synchronous signal, simultaneously by analog switch (5) control end 10, another organizes four road inputs 19 foot control systems, 2,4,5 pin, make 1 and 2 pin, 4 with after 5 pin link to each other respectively, the square wave that low-frequency oscillator (9) is produced is input to 1 again, 2 pin, and this square-wave signal is added to 4 after anti-phase, 5 pin, 1,2 pin and liquid crystal glasses g
1Left side eyeglass links to each other, and 4,5 pin then connect its right eyeglass, and analog switch (5) output 3 pin meet liquid crystal glasses g
1Public output; In the receiving system (II), receive the photoelectric synchronous signal that sends on the television screen with photelectric receiver (14), with the signal of noting carry out shaping, amplify go forward side by side the horizontal pulse broadening with postpone after be added to control end 10 pin of analog switch (18), make one group of four road input, 1,2,4,5 pin in two groups of the control end 10 foot control systems of analog switch (18) itself, make 1 to be input to 1,2 pin with 2 pin, 4 with the square wave that again low-frequency oscillator (19) is produced after 5 pin link to each other and this square-wave signal is joined 4 and 5 pin, 1,2 pin and liquid crystal glasses g after anti-phase
2Left side eyeglass links to each other, and 4,5 pin then connect its right eyeglass, and analog switch (18) output 3 pin meet liquid crystal glasses g
2Public output.
2, time-division colour three-D TV image optical synchronous signal according to claim 1 and light valve of liquid crystal glasses drive method, it is characterized in that in the described emission system (I) two gamma cameras (1) (2) being placed on the three-dimensional The Cloud Terrace (3), can regulate its convergent angle, distance between axles, the angle of pitch and horizontal level.
3, time-division colour three-D TV image optical synchronous signal according to claim 1 and light valve of liquid crystal glasses drive method, it is characterized in that with synchronizing signal phase locking unit (4) two gamma cameras (1) (2) being carried out synchronously.
4, time-division colour three-D TV image optical synchronous signal according to claim 1 and light valve of liquid crystal glasses drive method, it is characterized in that described two two-way colour-video signals of penetrating the machine of elephant (1) (2) output all are input to clamper (12) through emitter follower (10) (11) respectively.
5, time-division colour three-D TV image optical synchronous signal according to claim 1 and light valve of liquid crystal glasses drive method, it is characterized in that an output signal in described two gamma cameras (1) (2) penetrates with isolation through emitter follower (21), go synchronously and the field sync signal extraction through sync separator and trigger (22) and sync separator and integrator (23) respectively again.
6, time-division colour three-D TV image optical synchronous signal according to claim 1 and light valve of liquid crystal glasses drive method, it is characterized in that described low-frequency oscillator (9) is added to analog switch (5) 4.5 pin after inverter (13) is anti-phase.
7, time-division colour three-D TV image optical synchronous signal according to claim 1 and light valve of liquid crystal glasses drive method, it is characterized in that photelectric receiver (14) amplifies the photoelectric synchronous signal of noting in the described receiving system (II) through shaping amplifier (15) shaping, after postponing, stretcher (16) broadening, delayer (17) be added to control end 10 pin of analog switch (18).
8, time-division colour three-D TV image optical synchronous signal according to claim 1 and light valve of liquid crystal glasses drive method, it is characterized in that the square-wave signal of described receiving system (II) medium and low frequency oscillator (19) output is added to 4,5 pin of analog switch (18) after inverter (20) is anti-phase.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92110176 CN1083299A (en) | 1992-08-25 | 1992-08-25 | Time-division colour three-D TV image optical synchronous signal and light valve of liquid crystal glasses drive method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 92110176 CN1083299A (en) | 1992-08-25 | 1992-08-25 | Time-division colour three-D TV image optical synchronous signal and light valve of liquid crystal glasses drive method |
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| CN1083299A true CN1083299A (en) | 1994-03-02 |
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| CN 92110176 Pending CN1083299A (en) | 1992-08-25 | 1992-08-25 | Time-division colour three-D TV image optical synchronous signal and light valve of liquid crystal glasses drive method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101588513B (en) * | 2009-01-07 | 2011-05-18 | 深圳市掌网立体时代视讯技术有限公司 | Device and method of stereo camera |
| US8896673B2 (en) | 2009-09-11 | 2014-11-25 | Hisense Electric Co., Ltd. | Method, TV set for displaying 3D image and glasses |
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1992
- 1992-08-25 CN CN 92110176 patent/CN1083299A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101588513B (en) * | 2009-01-07 | 2011-05-18 | 深圳市掌网立体时代视讯技术有限公司 | Device and method of stereo camera |
| US8896673B2 (en) | 2009-09-11 | 2014-11-25 | Hisense Electric Co., Ltd. | Method, TV set for displaying 3D image and glasses |
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