CN102841450B - Digital content polarization 3D method and system - Google Patents
Digital content polarization 3D method and system Download PDFInfo
- Publication number
- CN102841450B CN102841450B CN201210339587.XA CN201210339587A CN102841450B CN 102841450 B CN102841450 B CN 102841450B CN 201210339587 A CN201210339587 A CN 201210339587A CN 102841450 B CN102841450 B CN 102841450B
- Authority
- CN
- China
- Prior art keywords
- polaroid
- voltage
- circuit
- output
- digital content
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Liquid Crystal (AREA)
Abstract
The invention relates to a digital content polarization 3D method and system. The method comprises the following steps: inputting frame signals of the digital content output by a projection machine into a polarizer control device; outputting a first control voltage and a second control voltage by the control device according to the frame signals of the digital content, wherein the first control voltage is opposite to the second control voltage; exerting the first control voltage to a first polarizer, wherein under the action of the first control voltage, the liquid crystal molecules of the first polarizer are in an asymmetric oblique exhibition state, and the first polarizer works in a left-handed rotation or right-handed rotation state; exerting the second control voltage to a second polarizer, wherein under the action of the second control voltage, the liquid crystal molecules of the second polarizer are in an oblique exhibition state, and the first polarizer works in a full phase light state; and outputting the optical signals of the digital content output by the projection machine after passing through the first polarizer and the second polarizer.
Description
Technical field
The present invention relates to polarization three-dimensional field, particularly a kind of digital content polarization stereoscopic approach and system.
Background technology
Along with the growth of ripe and 3D consumer market demand day by day of 3D television technology, the 3D industrial chain in the whole world is increasingly complete, emerges a large amount of 3D cinema equipment suppliers, according to 3D, realizes principle difference, mainly be divided into initiatively three-dimensional 3D, polarization 3D and spectrum 3D technology three major types.For polarization three-dimensional projection technology, the technology of main flow is the deflection technique based on polaroid at present.As shown in Figure 1, be the technology of polarization three-dimensional projection traditionally schematic diagram.In traditional projection technology, in order to realize three-dimensional 3D imaging effect, must use Liang Tai projector to work simultaneously, in figure, not provide other Yi Tai projector.Three-dimensional film is with two camera lenses, as human eye, from two different directions, to take the picture of scenery simultaneously, makes cinefilm.When projection, by two projectors, two groups of films that take with two video cameras are synchronously shown, make these slightly differentiated two width doublings of the image in screen.If at this moment use eyes direct viewing, the picture of seeing is ambiguous, see three-dimensional film, will before every projector, fill a polaroid, and its effect is equivalent to the polarizer.The light penetrating from two projectors, after polaroid, has just become polarized light.The polarization direction of the polaroid before two projectors in left and right is orthogonal, thereby the polarization direction of the two bundle polarized lights that produce is also orthogonal.This two bundles polarized light projects and in screen, reflexes to spectators place again, direction of polarized light does not change spectators and watches with above-mentioned polarising glass, every eyes are only seen corresponding polarized light image, be that left eye can only be seen the picture that left machine mirrors, right eye can only be seen the picture that right machine mirrors, and will as direct viewing, produce stereo perception like this.The principle of Here it is three-dimensional film.And function as shown in Figure 2, be the control waveform figure of polarizer output in polarization three-dimensional projection traditionally.Beholder wears and comprises the glasses (left eye is left-hand polarization sheet, and right eye is dextropolarization sheet) that two deflection polarity eyeglasses form.When projector shows left-eye image, under the control of the control voltage shown in Fig. 2, can deflect into left-handed polarity by gauche form polaroid, beholder just can only see left-eye image by glasses.When projector shows eye image, under the control of the control voltage shown in Fig. 2, can deflect into dextrorotation polarity by gauche form polaroid, beholder can only see eye image by glasses.Must there be enough refresh rate Alternation Display images in projector, so that beholder can not aware flashing between alternate images (flicker).
3D system based on this kind of technology does not need the image of right and left eyes to carry out any special processing, and the fidelity of image is very high, can not be subject to the impact of the distribution master of the unified digital 3D film of DCI/SMPTE simultaneously yet.The difficult point that designs such 3D system is:
(1) for high switching frequency that can gauche form polaroid.Its highest switching frequency of electronic shutter that conventional TN LCD forms is 100Hz left and right, and its highest switching frequency need to reach 144Hz during for 3D film.
(2) general LCD(comprises TN LCD) maximum light output rating be 45%, its reason is all to have used polarizing coating in all LCD design, it has approximately stopped 50% light, other 5% loss derives from the scattering of glass and liquid crystal in LCD.
(3), because right and left eyes image needs order projection, therefore need the polarizer can between contrary polarization direction, switch at a high speed (for frequency tripling, its switching frequency need to reach 144Hz).The polarizer that utilizes LC to control, the polarizer switches under the control of synchronizing signal between Left-hand circular polarization and right-hand circular polarization (or horizontal polarization and vertical polarization).But due to the operating characteristic of liquid crystal, in the process of switching in polarization polarity, can cause intermediate state to a certain degree, can cause light leak to a certain degree, so just produce ghost.
The structure that the Dr.Philip J.Bos of Pi-cell Shi You U.S. Kent State University (Ken State University) first proposes in nineteen eighty-three, it is 180 degree that Pi-cell has expressed the molecular long axis phase differential of liquid crystal molecule on upper and lower base plate surface, is different from the twist nematic(TN of 90 degree at that time) liquid crystal.Although find that there is rapid-action characteristic under crooked (bend mode), yet due to larger liquid crystal gap, its component application is subject to the restriction of excessive driving voltage, cannot operate under the condition of TFT active drive assembly.Until 1993, the Nei Tian of northeastern Japan university research department (Dr.Uchida) utilizes identical structure, add optically biaxial compensate film (Biaxial Retardation Film), and reduce liquid crystal gap, optical compensation curved liquid crystal mode (OCB Mode) has been proposed, this structure-improved significantly drops to below 7 volts driving voltage, and OCB mode can be operated under the active drive assembly condition of TFT.When impressed voltage makes inner liquid crystal reach bending status, the liquid crystal molecule of upper and lower glass baseplate surface is arranged in parallel, but the liquid crystal molecule of internal layer can distortion, just at a plane inner bending, arrange, and in bending status, liquid crystal molecule distributes and is upper and lower symmetry, add after optical compensation films, this pattern can overcome visual angle and be subject to the impact that liquid crystal molecules tilt causes changes in optical properties, so OCB Mode has the advantage of wide viewing angle.
The operation of OCB Mode must be at bending status (bend mode), so liquid crystal molecule must first go under needed pattern and could operate.Liquid crystal molecule is sandwiched in the middle of two sheet glass substrates, and the medial surface of glass substrate can plate layer of transparent conductive layer tin indium oxide (Indium Tin Oxide, ITO) as electrode, and be evenly coated with and gather sub-acyl (Polyimide on electrode, PI) as alignment film, and alignment direction is parallel orientation.More than application is mainly in liquid crystal display, this application liquid crystal molecule is just as switch, allow light pass through, or allow light not pass through, in liquid crystal display, show bright or black two states, the liquid crystal molecule of liquid crystal display inside or the duty in spreading condition so, duty in core state, liquid crystal molecule will be converted to core state by spreading condition, needs higher driving voltage, and need more complicated drive waveforms, thereby make circuit design more complicated.
Summary of the invention
To the object of the invention is that polarizer switching frequency is low in order solving, polarization three-dimensional projection ghost affects large problem, to propose a kind of digital content polarization stereoscopic approach and system, realize the switching frequency that improves the polarizer, and greatly reduce ghost impact.
For achieving the above object, the invention provides a kind of digital content polarization stereoscopic approach, comprising:
The frame signal of the digital content of projector's output is inputed in the control device of the polarizer;
Described control device is controlled voltage and second according to the frame signal output first of digital content and is controlled voltage, and described the first control voltage is the reverse voltage of the second control voltage;
By described first, control voltage and put on the first polaroid, the liquid crystal molecule under the effect of the first control voltage in the first polaroid, in asymmetric spreading condition, makes the first polaroid be operated in left-handed rotation or right-handed rotation state;
By described second, control voltage simultaneously and put on the second polaroid, the liquid crystal molecule under the effect of the second control voltage in the second polaroid, in spreading condition, makes the second polaroid be operated in full phase light state;
The light signal of projector's output digital content is exported after the first polaroid and the second polaroid.
Optionally, in an embodiment of the present invention, described polaroid is that Pi-Cell production technology electricity consumption submode are realized the polaroid switching at a high speed.
Optionally, in an embodiment of the present invention, described two polaroids are overlapped in one and are arranged at before projector lens.
Optionally, in an embodiment of the present invention, described the first polaroid is operated in left-handed rotation state, and the light signal of projector's output digital content is exported left-handed rotation after the first polaroid and the second polaroid.
Optionally, in an embodiment of the present invention, described the first polaroid is operated in right-handed rotation state, and the light signal of projector's output digital content is exported right-handed rotation after the first polaroid and the second polaroid.
Optionally, in an embodiment of the present invention, described the first/bis-controls the identical square wave control voltage of frame signal cycle that voltage is sectional type, digital content symmetrical about time shaft, that export with described projector, and the described the first/bis-magnitude of voltage of controlling voltage is V ,-V, V
crwith-V
cr; Wherein, V > V
c>=V
cr, V
cfor critical voltage, when impressed voltage is greater than V
ctime, liquid crystal molecule can be affected.
Optionally, in an embodiment of the present invention, described control device comprises:
Input circuit, for inputing to single-chip microcomputer by the frame signal of the digital content of projector's output;
Single-chip microcomputer, for obtaining left signal and right signal after the frame signal delay process to digital content identification, controls regulating circuit according to left/right signal, and simultaneously to selecting volt circuit to carry out voltage selection;
Regulating circuit, adjusts the first/bis-magnitude of voltage of controlling voltage for the signal processed according to single-chip microcomputer and reference voltage;
Select volt circuit, the first/bis-magnitude of voltage of controlling voltage obtaining for the signal processed according to single-chip microcomputer and described regulating circuit is selected polarization voltage;
Output circuit, for by the polarization Voltage-output that selects volt circuit to obtain to corresponding polaroid.
Optionally, in an embodiment of the present invention, described control device also comprises the driving circuit for the signal of input circuit input is carried out to one-level driving; The input end of described driving circuit is connected with the output terminal of described input circuit, and the output terminal of described driving circuit is connected with the input end of described the first/bis-single-chip microcomputer.
Optionally, in an embodiment of the present invention, described input circuit is connected with second singlechip with the first single-chip microcomputer respectively, described the first single-chip microcomputer selects volt circuit to be connected with the first regulating circuit with first respectively, described the first regulating circuit selects volt circuit to be connected with described first, described first selects volt circuit to be connected with described output circuit, described second singlechip selects volt circuit to be connected with the second regulating circuit with second respectively, described the second regulating circuit selects volt circuit to be connected with described second, described second selects volt circuit to be connected with described output circuit, the first output port of described output circuit is by the first the first control Voltage-output to the first polaroid that selects volt circuit to obtain, the second output port of described output circuit is by the second the second control Voltage-output to the second polaroid that selects volt circuit to obtain.
For achieving the above object, the present invention also provides a kind of digital content polarization stero, comprising:
Load module, for inputing to the frame signal of the digital content of projector's output the control device of the polarizer;
The polarizer, comprises control device, for controlling voltage and second according to the frame signal output first of digital content, controls voltage, and described the first control voltage is the reverse voltage of the second control voltage;
Polarising means, comprise two polaroids, for controlling voltage by described first, put on the first polaroid, the liquid crystal molecule under the effect of the first control voltage in the first polaroid, in asymmetric spreading condition, makes the first polaroid be operated in left-handed rotation or right-handed rotation state; By described second, control voltage simultaneously and put on the second polaroid, the liquid crystal molecule under the effect of the second control voltage in the second polaroid, in spreading condition, makes the second polaroid be operated in full phase light state; The light signal of projector's output digital content is exported after the first polaroid and the second polaroid.
Optionally, in an embodiment of the present invention, described polaroid is that Pi-Cell production technology electricity consumption submode are realized the polaroid switching at a high speed.
Optionally, in an embodiment of the present invention, described two polaroids are overlapped in one and are arranged at before projector lens.
Optionally, in an embodiment of the present invention, described the first polaroid is operated in left-handed rotation state, and the light signal of projector's output digital content is exported left-handed rotation after the first polaroid and the second polaroid.
Optionally, in an embodiment of the present invention, described the first polaroid is operated in right-handed rotation state, and the light signal of projector's output digital content is exported right-handed rotation after the first polaroid and the second polaroid.
Optionally, in an embodiment of the present invention, described the first/bis-controls the identical square wave control voltage of frame signal cycle that voltage is sectional type, digital content symmetrical about time shaft, that export with described projector, and the described the first/bis-magnitude of voltage of controlling voltage is V ,-V, V
crwith-V
cr; Wherein, V > V
c>=V
cr, V
cfor critical voltage, when impressed voltage is greater than V
ctime, liquid crystal molecule can be affected.
Optionally, in an embodiment of the present invention, described control device comprises:
Input circuit, for inputing to single-chip microcomputer by the frame signal of the digital content of projector's output;
Single-chip microcomputer, for obtaining left signal and right signal after the frame signal delay process to digital content identification, controls regulating circuit according to left/right signal, and simultaneously to selecting volt circuit to carry out voltage selection;
Regulating circuit, adjusts the first/bis-magnitude of voltage of controlling voltage for the signal processed according to single-chip microcomputer and reference voltage;
Select volt circuit, the first/bis-magnitude of voltage of controlling voltage obtaining for the signal processed according to single-chip microcomputer and described regulating circuit is selected polarization voltage;
Output circuit, for by the polarization Voltage-output that selects volt circuit to obtain to corresponding polaroid.
Optionally, in an embodiment of the present invention, described control device also comprises the driving circuit for the signal of input circuit input is carried out to one-level driving; The input end of described driving circuit is connected with the output terminal of described input circuit, and the output terminal of described driving circuit is connected with the input end of described the first/bis-single-chip microcomputer.
Optionally, in an embodiment of the present invention, described input circuit is connected with second singlechip with the first single-chip microcomputer respectively, described the first single-chip microcomputer selects volt circuit to be connected with the first regulating circuit with first respectively, described the first regulating circuit selects volt circuit to be connected with described first, described first selects volt circuit to be connected with described output circuit, described second singlechip selects volt circuit to be connected with the second regulating circuit with second respectively, described the second regulating circuit selects volt circuit to be connected with described second, described second selects volt circuit to be connected with described output circuit, the first output port of described output circuit is by the first the first control Voltage-output to the first polaroid that selects volt circuit to obtain, the second output port of described output circuit is by the second the second control Voltage-output to the second polaroid that selects volt circuit to obtain.
Technique scheme has following beneficial effect: due to the polaroid having adopted based on Pi-Cell production technology, make the switching frequency of the polarizer under the control of the control voltage of control circuit output greatly improve (up to 400Hz) with respect to the polarization stero on market.In addition, due to the polaroid adopting based on Pi-Cell production technology, optical efficiency has improved 17%, supports the contrast of 10000:1.On this basis, when control voltage is sectional type control waveform, can reduce to greatest extent light leak, ghost is less than like product.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the technology of polarization three-dimensional projection traditionally schematic diagram;
Fig. 2 is the control waveform figure of polarizer output in polarization three-dimensional projection traditionally;
Fig. 3 a is the structural drawing of TN LCD liquid crystal molecule
Fig. 3 b is the structural drawing of Pi-Cell (OCB) LCD liquid crystal molecule;
Fig. 4 is the liquid crystal molecule constitutional diagram based on Pi-Cell principle of light in the time can passing through polaroid;
Fig. 5 is the liquid crystal molecule constitutional diagram based on Pi-Cell principle of light when being polarized sheet blocking state;
Fig. 6 is a kind of digital content polarization stereoscopic approach process flow diagram that the present invention proposes;
Fig. 7 is the control device structured flowchart arranging in the polarizer in the digital content polarization three-dimensional projection that proposes of the present invention;
Fig. 8 a is the first oscillogram of controlling voltage in the digital content polarization three-dimensional projection that proposes of the present invention;
Fig. 8 b is the second oscillogram of controlling voltage in the digital content polarization three-dimensional projection that proposes of the present invention;
Fig. 9 is the structured flowchart of a kind of digital content polarization stero of proposing of the present invention;
Figure 10 is control device structured flowchart in embodiments of the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described.Obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
There are in the world at present two kinds of polaroid production technology Pi-Cell and TNSTN.
As Fig. 3 a, it is the structural drawing of TN LCD liquid crystal molecule.TNSTN produces twist angle by liquid crystal molecule, and twist angle is 90 ° ~ 270 °.Along with the difference of twist angle and polaroid angle, TNSTN can have yellowish green pattern, blue pattern, grey pattern etc.TNSTN has positivity and negativity etc.By drives switching frequency, be up to 100Hz.
As Fig. 3 b, it is the structural drawing of Pi-Cell (OCB) LCD liquid crystal molecule.The operation of Pi-Cell is mainly between between case of bending and vertical state, and the difference of this two states liquid crystal little, and voltage shift do not have reversed flow phenomenon after removing, and the reaction time can be faster than other patterns.But Pi-Cell is before operation, and molecules align becomes Splay shape, Pian Ya And need to be provided before operation conventionally and continue for some time, could driven.Pi-Cell, because the reaction time is fast, can drive switching frequency to reach as high as 400Hz by oversampling circuit.And the luminous flux of Pi-Cell is greater than TNSTN.
Following table is the comparison sheet of the Pi-Cell polarizer and the general T NSTN polarizer
| TNSTN | Pi-Cell | |
| Reaction time | 350us | <1us |
| Visual angle | 90°-120° | 170° |
| Plate thickness | 0.9-1.9mm | 0.7-1mm |
| Power consumption | 2.5mW/Inch2 | 6mW/Inch2 |
| Contrast | About 10:1 | 200：1～300：1 |
| Brightness (cd/m2) | 50 | 60 |
The polaroid that the high speed that the technical program adopts Pi-Cell technology electricity consumption submode to realize is switched, introduce Pi-Cell principle of work below:
When making alive not, Liquid Crystal Molecules Alignment direction can present along alignment direction the state of expansion, is therefore referred to as Splay state, also can be called spreading condition.And be greater than after the voltage of critical voltage (Vc) at additional one, liquid crystal molecule is subject to extra electric field impact, originally the liquid crystal molecule that is parallel to upper and lower base plate in the middle of liquid crystal can move to upper substrate or infrabasal plate, and an asymmetric situation of formation, being called Asymmetric Splay state, is also asymmetric spreading condition.Under this state, liquid crystal molecule is unsettled, if at this moment voltage is made zero, molecule can be got back to symmetrical spreading condition at once.If continue making alive, liquid crystal molecule can be inclined to the bending status that free energy is lower and arrange situation, but bending status and spreading condition are upper and dissimilar in topography (Topology), when conversion, need to pass through nucleation (Nucleation) reaches, if liquid crystal molecule has part to turn bending status, just become the transition core of liquid crystal Inner, other liquid crystal molecules will become bending status gradually along transition core, the area of bending status is extended gradually, until whole liquid crystal molecules all goes to bending status, the time that this process need is longer.If but cannot form transition core always, liquid crystal molecule just probably cannot go to bending status.And go to after bending status when liquid crystal molecule, when impressed voltage is less than critical voltage, the liquid crystal molecule of bending status can forward the torsion state (Twist) of 180 degree to moment, then goes back to spreading condition by nucleation.
As shown in Figure 4, be the liquid crystal molecule constitutional diagram based on Pi-Cell principle of light in the time that polaroid can be passed through; As shown in Figure 5, be the liquid crystal molecule constitutional diagram based on Pi-Cell principle of light when being polarized sheet blocking state.Based on the basic optical principle of existing 3D Play System imaging, the technical program adopts the polaroid of making based on Pi-Cell production technology when adding certain voltage, there is part deflection in the liquid crystal molecule near polarizer substrate, be that liquid crystal molecule is in asymmetric spreading condition, the light of now 0 ° ~ 360 ° of phase places only has the light of part phase place to pass through while passing polaroid, the polaroid of making based on Pi-Cell production technology is when adding certain voltage, liquid crystal molecule in polaroid is always in spreading condition, when the light of now 0 ° ~ 360 ° of phase places passes polaroid, the light of whole phase places passes through.
As shown in Figure 6, a kind of digital content polarization stereoscopic approach process flow diagram proposing for the present invention.The method comprises the steps:
Step 101: the frame signal of the digital content of projector's output is inputed in the control device of the polarizer;
Step 102: described control device is controlled voltage and second according to the frame signal output first of digital content and controlled voltage, described the first control voltage is the reverse voltage of the second control voltage;
Step 103: control voltage by described first and put on the first polaroid, the liquid crystal molecule under the effect of the first control voltage in the first polaroid, in asymmetric spreading condition, makes the first polaroid be operated in left-handed rotation or right-handed rotation state; By described second, control voltage simultaneously and put on the second polaroid, the liquid crystal molecule under the effect of the second control voltage in the second polaroid, in spreading condition, makes the second polaroid be operated in full phase light state; The light signal of projector's output digital content is exported after the first polaroid and the second polaroid.In this method, use Yi Tai projector, and this projector exports two kinds of signals simultaneously, the frame signal that the first signal is digital content, obtains and controls the first/bis-of polaroid and control voltage according to the frame signal of this digital content; The second signal is the light signal of digital content, and this light signal is exported left-handed rotation or right-handed rotation after by the first polaroid and the second polaroid.Described the first polaroid is operated in left-handed rotation state, and the light signal of projector's output digital content is exported left-handed rotation after the first polaroid and the second polaroid.Described the first polaroid is operated in right-handed rotation state, and the light signal of projector's output digital content is exported right-handed rotation after the first polaroid and the second polaroid.
Optionally, in an embodiment of the present invention, described polaroid is that Pi-Cell production technology electricity consumption submode are realized the polaroid switching at a high speed.
Optionally, in an embodiment of the present invention, described two polaroids are overlapped in one and are arranged at before projector lens.Described two polaroids are overlapped in one and are arranged at before projector lens.Polaroid in this system is that Pi-Cell production technology electricity consumption submode are realized the polaroid switching at a high speed, and be arranged at projector lens the place ahead, compared with prior art, the glasses that spectators wear while seeing 3D video just need not possess polarization function, greatly reduce like this input cost.
Optionally, in an embodiment of the present invention, described control device comprises:
Input circuit, for inputing to single-chip microcomputer by the frame signal of the digital content of projector's output;
Single-chip microcomputer, for obtaining left signal and right signal after the frame signal delay process to digital content identification, controls regulating circuit according to left/right signal, and simultaneously to selecting volt circuit to carry out voltage selection;
Regulating circuit, adjusts the first/bis-magnitude of voltage of controlling voltage for the signal processed according to single-chip microcomputer and reference voltage;
Select volt circuit, the first/bis-magnitude of voltage of controlling voltage obtaining for the signal processed according to single-chip microcomputer and described regulating circuit is selected polarization voltage;
Output circuit, for by the polarization Voltage-output that selects volt circuit to obtain to corresponding polaroid.
Described control device also comprises the driving circuit for the signal of input circuit input is carried out to one-level driving; The input end of described driving circuit is connected with the output terminal of described input circuit, and the output terminal of described driving circuit is connected with the input end of described the first/bis-single-chip microcomputer.
As shown in Figure 7, the control device structured flowchart for arranging in the polarizer in the digital content polarization three-dimensional projection of the present invention's proposition.Described input circuit 201 is connected with second singlechip 207 with the first single-chip microcomputer 202 respectively, described the first single-chip microcomputer 202 selects volt circuit 204 to be connected with the first regulating circuit 203 and first respectively, described the first regulating circuit 203 selects volt circuit 204 to be connected with described first, described first selects volt circuit 204 to be connected with described output circuit 208, described second singlechip 207 selects volt circuit 205 to be connected with the second regulating circuit 206 and second respectively, described the second regulating circuit 206 selects volt circuit 205 to be connected with described second, described second selects volt circuit 205 to be connected with described output circuit 208, the first output port of described output circuit 208 is by first the first control Voltage-output to the first polaroid A of selecting volt circuit 204 to obtain, the second output port of described output circuit 208 is by the second the second control Voltage-output to the second polaroid B that selects volt circuit 205 to obtain.
As shown in Figure 8 a, in the digital content polarization three-dimensional projection for the present invention's proposition, control the oscillogram of voltage; As shown in Figure 8 b, in the digital content polarization three-dimensional projection for the present invention's proposition, control the oscillogram of voltage.From Fig. 8 a and Fig. 8 b, the first control voltage is the reverse voltage of the second control voltage, the first/bis-controls the identical square wave control voltage of frame signal cycle that voltage is sectional type, digital content symmetrical about time shaft, that export with described projector, and the first/bis-magnitude of voltage of controlling voltage is V ,-V, V
crwith-V
cr; Wherein, V > V
c>=V
cr, V
cfor critical voltage, when impressed voltage is greater than V
ctime, liquid crystal molecule can be affected.Through repetition test, V=7, is taken as 7 ,-7 at the magnitude of voltage of controlling voltage, V
crwith-V
crtime, the impact of ghost can be down to minimum.
The structured flowchart of a kind of digital content polarization stero proposing for the present invention as shown in Figure 9.This system comprises:
Load module 301, for inputing to the frame signal of the digital content of projector's output the control device of the polarizer;
The polarizer 302, comprises control device, for controlling voltage and second according to the frame signal output first of digital content, controls voltage, and described the first control voltage is the reverse voltage of the second control voltage;
Polarising means 303, comprise two polaroids, for controlling voltage by described first, put on the first polaroid, the liquid crystal molecule under the effect of the first control voltage in the first polaroid, in asymmetric spreading condition, makes the first polaroid be operated in left-handed rotation or right-handed rotation state; By described second, control voltage simultaneously and put on the second polaroid, the liquid crystal molecule under the effect of the second control voltage in the second polaroid, in spreading condition, makes the second polaroid be operated in full phase light state; The light signal of projector's output digital content is exported after the first polaroid and the second polaroid.
In native system, use Yi Tai projector, and this projector exports two kinds of signals simultaneously, the frame signal that the first signal is digital content, obtains and controls the first/bis-of polaroid and control voltage according to the frame signal of this digital content; The second signal is the light signal of digital content, and this light signal is exported left-handed rotation or right-handed rotation after by the first polaroid and the second polaroid.Described the first polaroid is operated in left-handed rotation state, and the light signal of projector's output digital content is exported left-handed rotation after the first polaroid and the second polaroid.Described the first polaroid is operated in right-handed rotation state, and the light signal of projector's output digital content is exported right-handed rotation after the first polaroid and the second polaroid.
Optionally, in an embodiment of the present invention, described polaroid is that Pi-Cell production technology electricity consumption submode are realized the polaroid switching at a high speed.
Optionally, in an embodiment of the present invention, described two polaroids are overlapped in one and are arranged at before projector lens.Described two polaroids are overlapped in one and are arranged at before projector lens.Polaroid in this system is that Pi-Cell production technology electricity consumption submode are realized the polaroid switching at a high speed, and be arranged at projector lens the place ahead, compared with prior art, the glasses that spectators wear while seeing 3D video just need not possess polarization function, greatly reduce like this input cost.
The scheme of inquiring in the embodiment of the present invention is digital content polarization three-dimensional projection technology.Wherein, polaroid is that Pi-Cell production technology electricity consumption submode are realized the polaroid switching at a high speed, two polaroids are overlapped in one and are arranged at before projector lens, and two output terminals that are arranged on the control device on the polarizer are connected with a polaroid respectively, the frame signal output terminal of the digital content that this control device other end plays back with projector in 3D projection system is connected.
As shown in figure 10, be control device structured flowchart in embodiments of the invention.The input circuit of this control device inputs to the Vpp=5V square-wave cycle signal of projector's output to adopt in the single-chip microcomputer that model is PIC18F66J60.Wherein, Vpp=5V square-wave cycle signal is the frame signal of the digital content of projector's output.In order to guarantee correctness and the protection single-chip microcomputer of data, the chip that is MC14050B through model using the square-wave signal of input adds one-level as driving circuit and drives, and then the frame signal of the digital content after driving is input in single-chip microcomputer.
Output circuit is also to use DB9 interface.Owing to there being two reciprocity modules of L/R, so should need 4 pins that use DB9 to output signal to L/R polaroid.
Each reciprocity module has used the chip that chip that 1 model is MCP41010I and 1 model are MC34063 to form regulating circuit, with the chip that 2 models are TC4432C, forms and selects volt circuit.The DCDC that MC34063(boosts) and MCP41010I form a crucial regulating circuit, the concrete pressure that can adjust output voltage by MCP41010I is worth.In the present embodiment, the reference voltage of MC34063 based on 5V generates 24V voltage under MCP41010I effect.This 24V voltage is given the mosfet driver of 2 TC4432C(with lock function simultaneously) power supply.Be equivalent to TC4432C input signal to convert to from 3.3V threshold the output digit signals of 24V threshold.System is used the output of two TC4432C to be connected to the two ends of output connector, gets their both pressure reduction and as the output of whole system, supplies the polarization voltage of polaroid.And the input of TC4432C we can accurately control the waveform that needs output by program, certainly also comprise and add certain delay time.In addition, MCP41010I is a pot IC who has SPI interface, and after its pin6 connects together with pin7, we can be it as an accurate resistance, and we can write corresponding register by SPI and set out concrete resistance value.
One-chip computer module is the nucleus module of whole system, its important function is exactly to obtaining left signal and right signal after the frame signal delay process of digital content identification, according to left/right signal, regulating circuit is controlled, and simultaneously to selecting volt circuit to carry out voltage selection.In addition, as shown in figure 10, the single-chip microcomputer using has the display module of being made by LCD display, can show output frequency input signal, shows output voltage, shows that whether L/R is reverse, shows the information such as IP address.Also there is the operational module that button forms, can in pressure regulation, realize pressure regulation by operation push-button.The port also with memory module and interconnection network.
In the first/bis-of output circuit output, control under the control of voltage, adopted the polaroid based on Pi-Cell production technology, the switching frequency of the polarizer improves (up to 400Hz) greatly with respect to the polarization stero on market.In addition, due to the polaroid adopting based on Pi-Cell production technology, optical efficiency has improved 17%, supports the contrast of 10000:1.On this basis, when control voltage is sectional type control waveform, can reduce to greatest extent light leak, ghost is less than like product.
Above-described embodiment; object of the present invention, technical scheme and beneficial effect are further described; institute is understood that; the foregoing is only the specific embodiment of the present invention; the protection domain being not intended to limit the present invention; within the spirit and principles in the present invention all, any modification of making, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (18)
1. a digital content polarization stereoscopic approach, described method comprises:
The frame signal of the digital content of projector's output is inputed in the control device of the polarizer;
Described control device is controlled voltage and second according to the frame signal output first of digital content and is controlled voltage;
By described first, control voltage and put on the first polaroid, by described second, control voltage simultaneously and put on the second polaroid;
It is characterized in that, described method also comprises:
The light signal of projector's output digital content is exported after the first polaroid and the second polaroid;
Wherein, described the first control voltage is the reverse voltage of the second control voltage;
Liquid crystal molecule under the effect of the first control voltage in the first polaroid, in asymmetric spreading condition, makes the first polaroid be operated in left-handed rotation or right-handed rotation state;
Liquid crystal molecule under the effect of the second control voltage in the second polaroid, in spreading condition, makes the second polaroid be operated in full phase light state.
2. method according to claim 1, is characterized in that, described polaroid is that Pi-Cell production technology electricity consumption submode are realized the polaroid switching at a high speed.
3. method according to claim 1 and 2, is characterized in that, described two polaroids are overlapped in one and are arranged at before projector lens.
4. method according to claim 1 and 2, is characterized in that, described the first polaroid is operated in left-handed rotation state, and the light signal of projector's output digital content is exported left-handed rotation after the first polaroid and the second polaroid.
5. method according to claim 1 and 2, is characterized in that, described the first polaroid is operated in right-handed rotation state, and the light signal of projector's output digital content is exported right-handed rotation after the first polaroid and the second polaroid.
6. method according to claim 1 and 2, it is characterized in that, described the first/bis-controls the identical square wave control voltage of frame signal cycle that voltage is sectional type, digital content symmetrical about time shaft, that export with described projector, and the described the first/bis-magnitude of voltage of controlling voltage is V ,-V, V
crwith-V
cr; Wherein, V > V
c>=V
cr, V
cfor critical voltage, when impressed voltage is greater than V
ctime, liquid crystal molecule can be affected.
7. method according to claim 1 and 2, is characterized in that, described control device comprises:
Input circuit, for inputing to single-chip microcomputer by the frame signal of the digital content of projector's output;
Single-chip microcomputer, for obtaining left signal and right signal after the frame signal delay process to digital content identification, controls regulating circuit according to left/right signal, and simultaneously to selecting volt circuit to carry out voltage selection;
Regulating circuit, adjusts the first/bis-magnitude of voltage of controlling voltage for the signal processed according to single-chip microcomputer and reference voltage;
Select volt circuit, the first/bis-magnitude of voltage of controlling voltage obtaining for the signal processed according to single-chip microcomputer and described regulating circuit is selected polarization voltage;
Output circuit, for by the polarization Voltage-output that selects volt circuit to obtain to corresponding polaroid.
8. method according to claim 7, is characterized in that, described control device also comprises the driving circuit for the signal of input circuit input is carried out to one-level driving; The input end of described driving circuit is connected with the output terminal of described input circuit, and the output terminal of described driving circuit is connected with the input end of described the first/bis-single-chip microcomputer.
9. method according to claim 7, it is characterized in that, described input circuit is connected with second singlechip with the first single-chip microcomputer respectively, described the first single-chip microcomputer selects volt circuit to be connected with the first regulating circuit with first respectively, described the first regulating circuit selects volt circuit to be connected with described first, described first selects volt circuit to be connected with described output circuit, described second singlechip selects volt circuit to be connected with the second regulating circuit with second respectively, described the second regulating circuit selects volt circuit to be connected with described second, described second selects volt circuit to be connected with described output circuit, the first output port of described output circuit is by the first the first control Voltage-output to the first polaroid that selects volt circuit to obtain, the second output port of described output circuit is by the second the second control Voltage-output to the second polaroid that selects volt circuit to obtain.
10. a digital content polarization stero, described system comprises:
Load module, for inputing to the frame signal of the digital content of projector's output the control device of the polarizer;
The polarizer, comprises control device, for controlling voltage and second according to the frame signal output first of digital content, controls voltage;
Polarising means, comprises two polaroids, for controlling voltage by described first, puts on the first polaroid, controls voltage simultaneously put on the second polaroid described second;
It is characterized in that,
Described polarising means, also exports after the first polaroid and the second polaroid for the light signal of projector's output digital content;
Wherein, described the first control voltage is the reverse voltage of the second control voltage;
Liquid crystal molecule under the effect of the first control voltage in the first polaroid, in asymmetric spreading condition, makes the first polaroid be operated in left-handed rotation or right-handed rotation state;
Liquid crystal molecule under the effect of the second control voltage in the second polaroid, in spreading condition, makes the second polaroid be operated in full phase light state.
11. systems according to claim 10, is characterized in that, described polaroid is that Pi-Cell production technology electricity consumption submode are realized the polaroid switching at a high speed.
12. according to the system described in claim 10 or 11, it is characterized in that, described two polaroids are overlapped in one and are arranged at before projector lens.
13. according to the system described in claim 10 or 11, it is characterized in that, described the first polaroid is operated in left-handed rotation state, and the light signal of projector's output digital content is exported left-handed rotation after the first polaroid and the second polaroid.
14. according to the system described in claim 10 or 11, it is characterized in that, described the first polaroid is operated in right-handed rotation state, and the light signal of projector's output digital content is exported right-handed rotation after the first polaroid and the second polaroid.
15. according to the system described in claim 10 or 11, it is characterized in that, described the first/bis-controls the identical square wave control voltage of frame signal cycle that voltage is sectional type, digital content symmetrical about time shaft, that export with described projector, and the described the first/bis-magnitude of voltage of controlling voltage is V ,-V, V
crwith-V
cr; Wherein, V > V
c>=V
cr, V
cfor critical voltage, when impressed voltage is greater than V
ctime, liquid crystal molecule can be affected.
16. according to the system described in claim 10 or 11, it is characterized in that, described control device comprises:
Input circuit, for inputing to single-chip microcomputer by the frame signal of the digital content of projector's output;
Single-chip microcomputer, for obtaining left signal and right signal after the frame signal delay process to digital content identification, controls regulating circuit according to left/right signal, and simultaneously to selecting volt circuit to carry out voltage selection;
Regulating circuit, adjusts the first/bis-magnitude of voltage of controlling voltage for the signal processed according to single-chip microcomputer and reference voltage;
Select volt circuit, the first/bis-magnitude of voltage of controlling voltage obtaining for the signal processed according to single-chip microcomputer and described regulating circuit is selected polarization voltage;
Output circuit, for by the polarization Voltage-output that selects volt circuit to obtain to corresponding polaroid.
17. systems according to claim 16, is characterized in that, described control device also comprises the driving circuit for the signal of input circuit input is carried out to one-level driving; The input end of described driving circuit is connected with the output terminal of described input circuit, and the output terminal of described driving circuit is connected with the input end of described the first/bis-single-chip microcomputer.
18. systems according to claim 16, it is characterized in that, described input circuit is connected with second singlechip with the first single-chip microcomputer respectively, described the first single-chip microcomputer selects volt circuit to be connected with the first regulating circuit with first respectively, described the first regulating circuit selects volt circuit to be connected with described first, described first selects volt circuit to be connected with described output circuit, described second singlechip selects volt circuit to be connected with the second regulating circuit with second respectively, described the second regulating circuit selects volt circuit to be connected with described second, described second selects volt circuit to be connected with described output circuit, the first output port of described output circuit is by the first the first control Voltage-output to the first polaroid that selects volt circuit to obtain, the second output port of described output circuit is by the second the second control Voltage-output to the second polaroid that selects volt circuit to obtain.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210339587.XA CN102841450B (en) | 2012-09-13 | 2012-09-13 | Digital content polarization 3D method and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210339587.XA CN102841450B (en) | 2012-09-13 | 2012-09-13 | Digital content polarization 3D method and system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102841450A CN102841450A (en) | 2012-12-26 |
| CN102841450B true CN102841450B (en) | 2014-09-03 |
Family
ID=47368963
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210339587.XA Active CN102841450B (en) | 2012-09-13 | 2012-09-13 | Digital content polarization 3D method and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102841450B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040114237A1 (en) * | 1992-06-11 | 2004-06-17 | Sedlmayr Steven R. | High efficiency electromagnetic beam projector, and systems and methods for implementation thereof |
| US20090040402A1 (en) * | 2007-08-07 | 2009-02-12 | Sony Corporation | Liquid crystal projector and control method for liquid crystal projector |
| CN101806995A (en) * | 2010-03-25 | 2010-08-18 | 河北工业大学 | Three-dimensional projecting apparatus with double liquid crystal light valves and single projector |
| US20100277577A1 (en) * | 2005-12-06 | 2010-11-04 | Reald Inc. | Enhanced ZScreen modulator techniques |
| CN202093252U (en) * | 2011-02-28 | 2011-12-28 | 深圳市亿思达显示科技有限公司 | Polarizing glasses, polarizing filter, projector, and stereoscopic image system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007233123A (en) * | 2006-03-02 | 2007-09-13 | Matsushita Electric Ind Co Ltd | Three-dimensional display apparatus |
-
2012
- 2012-09-13 CN CN201210339587.XA patent/CN102841450B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040114237A1 (en) * | 1992-06-11 | 2004-06-17 | Sedlmayr Steven R. | High efficiency electromagnetic beam projector, and systems and methods for implementation thereof |
| US20100277577A1 (en) * | 2005-12-06 | 2010-11-04 | Reald Inc. | Enhanced ZScreen modulator techniques |
| US20090040402A1 (en) * | 2007-08-07 | 2009-02-12 | Sony Corporation | Liquid crystal projector and control method for liquid crystal projector |
| CN101806995A (en) * | 2010-03-25 | 2010-08-18 | 河北工业大学 | Three-dimensional projecting apparatus with double liquid crystal light valves and single projector |
| CN202093252U (en) * | 2011-02-28 | 2011-12-28 | 深圳市亿思达显示科技有限公司 | Polarizing glasses, polarizing filter, projector, and stereoscopic image system |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2007-233123A 2007.09.13 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102841450A (en) | 2012-12-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5852124B2 (en) | Stereoscopic display system, glasses used in the system, and display method therefor | |
| US20140049706A1 (en) | Stereoscopic Image Display Device | |
| US20150109269A1 (en) | Stereoscopic image display device and method for driving the same | |
| WO2014054520A1 (en) | Stereoscopic display device | |
| CN101387758A (en) | 2D-3D convertible stereo display device | |
| WO2012096032A1 (en) | Three-dimensional image display device | |
| US20120038854A1 (en) | Display apparatus and light barrier device | |
| CN104715727A (en) | Backlight module device and control method thereof as well as television (TV) | |
| CN106019736A (en) | 3D display panel assembly and 3D display device | |
| US9883177B2 (en) | Stereoscopic image display device and eye-tracking method thereof | |
| CN101685210A (en) | Image processing system and method capable of changing polarizing angle of polarized image | |
| CN203037968U (en) | Three dimensional (3D) glasses | |
| CN102841450B (en) | Digital content polarization 3D method and system | |
| US20120188472A1 (en) | Monolithic Liquid Crystal Shutter Glasses | |
| CN206074969U (en) | Specular removal shutter stereo glasses | |
| CN109254414A (en) | Active 3D glasses and control method thereof, 3D display system and dual-purpose glasses | |
| CN103969876B (en) | Polarized light converter based on blue-phase liquid crystal | |
| CN208888494U (en) | Active 3D glasses, 3D display system and dual-purpose glasses | |
| KR101859375B1 (en) | Stereopsis image display device and method for driving the same | |
| CN203178634U (en) | Liquid crystal box structure | |
| CN102890363B (en) | Liquid crystal display and device for displaying stereoscopic images | |
| CN102158724B (en) | Display system and method for producing three-dimensional (3D) image | |
| JP2013101165A (en) | Single chip liquid crystal three-dimensional glasses | |
| CN103941535A (en) | Stereo projection system | |
| CN103941536A (en) | Stereo projection system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |