CN1176554C

CN1176554C - Shielding signal generator for stereo liquid crystal spectacles

Info

Publication number: CN1176554C
Application number: CNB011112794A
Authority: CN
Inventors: 庄建宗; 袁仁民; 叶国炜
Original assignee: Silicon Integrated Systems Corp
Current assignee: Silicon Integrated Systems Corp
Priority date: 2001-03-15
Filing date: 2001-03-15
Publication date: 2004-11-17
Anticipated expiration: 2021-03-15
Also published as: CN1375725A

Abstract

The present invention provides a shielding signal generator for stereo liquid crystal spectacles, which comprises a signal generation unit, a timing unit, a signal delay unit and an output unit, wherein the signal generation unit generates preceding-stage shielding signals by using vertical synchronizing signals of videos as triggering signals; the timing unit comprises a register and changes the value of the register according to delay input signals and advanced input signals; the signal delay unit is connected with the signal generation unit and the timing unit, and the signal delay unit delays the preceding-stage shielding signals and outputs delay shielding signals according to the value of the register of the timing unit; the output unit is connected with the signal delay unit, and outputs the delay shielding signals to the stereo liquid crystal spectacles. The shielding signal generator provides the function of controlling the time sequence of the shielding signals for users.

Description

The mask signal generator of crystal glasses

Technical field

The present invention relates to signal generator, particularly the mask signal generator of crystal glasses.

Background technology

For the mankind's vision,,, therefore can obtain the distance that three-dimensional image also can be known the identification object so the image that image and right eye captured that left eye captured is different because the parallax image that left eye and right eye are seen is independently.But, in general image display system, do not export left-eye images and right-eye image respectively, so image that spectators see is flat image, there is no stereoeffect.In order to allow spectators can watch excellent stereopsis, three-dimensional film for example can be by showing the image of right and left eyes in regular turn on screen, but and the anaglyph spectacles of the right left eye of cooperation quick shading watch, reach the function of watching stereopsis.If the left eye of anaglyph spectacles and the switch speed between right eye can't be differentiated wherein variation near right and left eyes, add human visual system's characteristic, can reach the stereopsis effect.Therefore in order to produce good stereopsis, the left-eye images of anaglyph spectacles and the switching between right-eye image must be synchronous with the stereopsis of left eye on the screen and right eye.

The anaglyph spectacles that often uses is the anaglyph spectacles (Liquid Crystal ShutterGlasses) of liquid crystal kenel at present.The anaglyph spectacles of this liquid crystal kenel (hereinafter to be referred as crystal glasses) need be with any mechanical veil, and only needing to interlock continuously applies the glasses of voltage to left eye and right eye, can allow the glasses of left eye and right eye cover in regular turn.Figure 1 shows that existing crystal glasses cooperates the shielding status figure of different pictures.As shown in the figure, screen 100 show in regular turn left-eye images, right-eye image ..., simultaneously crystal glasses 110 cover in regular turn right eye 112, left eye 111 ...Therefore, put on this crystal glasses and can allow left eye see left-eye images, and allow right eye see right-eye image, reach the effect of watching stereopsis.

Figure 2 shows that the sequential chart of general crystal glasses mask signal.Owing to all have a vertical synchronizing signal before each image frame (image frame) beginning.Therefore, general crystal glasses mask signal generator, the mask signal of its left eye and right eye promptly according to this vertical synchronizing signal as triggering signal.For example, in Fig. 2, when the screen display left-eye images, the right eye mask signal is a high level, so the right eye crested, and this moment, the left eye mask signal was a low level, so left eye can be seen image.Otherwise when the screen display right-eye image, the right eye mask signal is a low level, so right eye can see image, and this moment, the left eye mask signal was a high level, so the left eye crested.So, apply the anaglyph spectacles of voltage, can simulate the effect of stereopsis to liquid crystal material by continuous and staggered.

But, since this mask signal only with vertical synchronizing signal as triggering signal, and can't judge that the image of present demonstration is left-eye images or right-eye image, therefore can't correctly export mask signal, be easy to the situation that causes the right and left eyes image to put upside down.The user needs frequent right and left eyes shielding status with manual mode switchable liquid crystal anaglyph spectacles, uses the effect that reaches synchronous demonstration.

Moreover, because different crystal glasses covers the speed difference, and the different influence of the phosphor attenuation rate of monitor (phosphor decay rate), the covering action nonsynchronous phenomenon can take place of the image of screen display and the crystal glasses of being arranged in pairs or groups, thereby cause the uncomfortable of beholder, and can't reach stereoeffect.For example, if the action of covering too early takes place, the afterimage of preceding a glance promptly can be seen by another eye; Otherwise if the action of covering is too slow, the preposition part of image can be by wrong a glance finding.

Summary of the invention

Because the problems referred to above, main purpose of the present invention provides a kind of crystal glasses mask signal generator that produces correct mask signal.

Another object of the present invention provides a kind ofly can adjust the crystal glasses mask signal generator that mask signal postpones or shifts to an earlier date by the user.

A further object of the present invention provides the crystal glasses mask signal generator of the different output interfaces of a kind of tool.

Crystal glasses mask signal generator of the present invention comprises: a signal generation unit produces the prime mask signal with the image vertical synchronizing signal as triggering signal; One timing unit comprises a register, and changes this register value according to the delay input signal of outside and input signal in advance; One signal delay unit is connected in described signal generation unit and described timing unit, and postpones described prime mask signal according to the register value of described timing unit, and the output delay mask signal; And an output unit is connected in described signal delay unit, and exports described delay mask signal to crystal glasses.

Description of drawings

For further understanding feature of the present invention, advantage now is described with reference to the accompanying drawings.

Fig. 1 is the shielding status figure that existing crystal glasses cooperates different pictures.

Fig. 2 is the sequential chart of general crystal glasses mask signal.

Fig. 3 is the calcspar of the mask signal generator of crystal glasses of the present invention.

Fig. 4 is the embodiment of the delay input signal of crystal glasses of the present invention with input signal generation in advance.

Fig. 5 is the embodiment of the reverse signal of crystal glasses of the present invention.

Fig. 6 is another embodiment of the reverse signal of crystal glasses of the present invention.

Fig. 7 is the embodiment of infrared ray anaglyph spectacles.

Embodiment

Fig. 3 is the calcspar of the mask signal generator of crystal glasses.As shown in the drawing, mask signal generator 1 of the present invention comprises a signal generation unit 10, a timing unit 20, is connected in this signal generation unit 10 and the signal delay unit 30 of timing unit 20 and the output unit 40 that is connected in this signal delay unit 30.

Signal generation unit 10 is to produce prime mask signal PSS with vertical synchronizing signal VSS as triggering signal, so this prime mask signal PSS and vertical synchronizing signal VSS are synchronous.In addition, this signal generation unit 10 is also according to an enabling signal, with first mask signal of correct output.This enabling signal is the signal that is produced when starting the 3D stereopsis, can reach the agreement of right and left eyes image and right and left eyes mask signal according to this signal.Promptly when this signal generation unit 10 is received the enabling signal activation, then send left-eye images, and send the right eye mask signal, so mask signal must cooperate with image.

Because different crystal glasses covers the speed difference, and the different influence of phosphor attenuation rate of monitor, the covering action nonsynchronous phenomenon can take place of the image of screen display and the crystal glasses of being arranged in pairs or groups.Therefore, the invention provides one and have the register that is used for storing the time that prime mask signal PSS should postpone.The value of this register can directly be imported suitable value via man-machine interface, or controls its register value by timing unit 20 receive delay input signals (Retarding Silgnal) and input signal (Leading Signal) in advance.Delay input signal and input signal in advance are the user's control by crystal glasses, that is the user is not too synchronous if discover image, can the control lag input signal or input signal is adjusted mask signal in advance sequential.

The delay input signal of Fig. 4 crystal glasses and the embodiment that shifts to an earlier date the input signal generation.In Fig. 4, when screen shows next stereopsis, crystal glasses is not received mask signal as yet synchronously, the preposition part meeting that causes the screen stereopsis is by wrong a glance finding, then user's may command delay input signal of crystal glasses is adjusted the sequential of mask signal, that is increases the value of register.Otherwise, when screen did not show next stereopsis as yet, crystal glasses had been received mask signal, and the afterimage of a glance is seen by another eye before causing, then user's may command of crystal glasses shifts to an earlier date the sequential that input signal is adjusted mask signal, that is reduces the value of register.

Signal delay unit 30 promptly postpones the output of prime mask signal PSS according to the register value of timing unit 20.For example, when register value is 10, can postpone the time output prime mask signal PSS of 10 reference pulses.This reference pulse can be the horizontal-drive signal of image.Therefore, no matter be the property difference of crystal glasses, or the difference of screen display speed, all can suitably adjust, to reach best stereopsis effect by the value of adjusting register.

Mask signal generator 1 of the present invention also provides a reverse unit 15 to come mask signal is carried out oppositely.This reverse unit 15 is to be connected between signal generation unit 10 and the signal delay unit 30, or is connected between signal delay unit 30 and the output unit 40.When starting for the first time, signal generation unit 10 produces prime mask signal PSS with VSS and enabling signal SS as triggering with vertical synchronizing signal.If the image of screen display covers action synchronously with the crystal glasses of being arranged in pairs or groups, then the oppositely not activation of reverse signal of unit 15 is not promptly done counteragent to above-mentioned prime mask signal, as shown in Figure 5.Otherwise, if the user discovers the right and left eyes image and puts upside down, can trigger reverse unit 15 by reverse input signal, make the reverse signal activation, above-mentioned prime mask signal PSS level is reverse, and reach the effect of synchronous demonstration, as shown in Figure 6.By reverse unit 15, the crystal glasses that can adjust because of different labels causes the opposite problem of right and left eyes mask signal.And this reverse signal can be stored in this reverse unit 15, so that adjust when starting at every turn.So for same crystal glasses.Do not need to adjust reverse signal at every turn.

Output unit 40 is to be used for exporting described delay mask signal to crystal glasses.This output unit 40 provides wired output type formula and wireless, and for example infrared ray and radio output pattern is selected for the user.Wired output pattern is general wired output, is about to mask signal and exports crystal glasses to by cable.Fig. 7 is the embodiment of infrared and radio output pattern.Among this embodiment, output unit 40 also comprises an infrared ray output module (figure does not show), uses converting the delay mask signal to infrared signal output.Crystal glasses then must dispose infrared receiver and receive the infrared signal that output unit 40 is exported, and signal is reached the infrared ray preamplifier (IR) of infrared ray crystal glasses, the conversion of signals of receiver being exported by three-dimensional synchronization signal decoder becomes control signal, the switching of control crystal glasses.

Infrared transmitter is to convert the delay mask signal to infrared ray output, and two different fixed frequencies of this infrared transmitter emission are with the varying level of representative delay mask signal.

Certainly, three-dimensional synchronization signal decoder has different decoding functions, for example the definable different code is represented the different conditions of mask signal, for example, the light tight state of left eye is defined as " 10101111 ", and three-dimensional synchronization signal decoder translates to it " 1 " and applies a voltage to the left eye crystal glasses; Or represent the different conditions of mask signal with fixed frequency signal, for example 38KHz is translated into the drive signal (" 1 " or " 0 ") of left eye or right eye.The mask signal generator of the crystal glasses of programmable is the crystal glasses of various different types, and bigger elasticity is provided.The user can select the pattern of output signal by software, is interpreted as available signal in order to the delay mask signal that provides three-dimensional synchronization signal decoder to receive.

The mask signal generator of crystal glasses of the present invention because the function that provides the user to control the mask signal sequential, promptly by user's control lag input signal and input signal in advance, therefore can be arranged in pairs or groups and use the crystal glasses of different qualities.

Though more than with the mask signal generator of preferred embodiment explanation crystal glasses of the present invention, it only is a kind of illustration, does not therefore limit scope of the present invention, those skilled in the art can carry out various distortion or change.For example, though be divided into signal generation unit, instant unit, signal delay unit and output unit etc. among the embodiment, its function can be incorporated in same unit and implement.

Claims

1. the mask signal generator of a crystal glasses comprises:

One signal generation unit produces the prime mask signal with the vertical synchronizing signal according to image as triggering signal;

One timing unit contains a register, receives the delay input signal that the user controlled and shifts to an earlier date input signal, and change the value of described register;

One signal delay unit is connected in described signal generation unit, and postpones described prime mask signal according to a register value, and the output delay mask signal; And,

One output unit is connected in described signal delay unit, and exports described delay mask signal to crystal glasses.

2. the mask signal generator of crystal glasses as claimed in claim 1 also comprises a signals reverse unit, is connected between described signal generation unit and the signal delay unit, and according to reverse signal described prime mask signal is carried out oppositely.

3. the mask signal generator of crystal glasses as claimed in claim 1 also comprises a signals reverse unit, is connected between described signal delay unit and the output unit, and according to reverse signal described delay mask signal is carried out oppositely.

4. the mask signal generator of crystal glasses as claimed in claim 1, wherein said output unit comprises infrared transmitter, in order to described delay mask signal is converted to infrared ray output.

5. the mask signal generator of crystal glasses as claimed in claim 4, two different fixed frequencies of wherein said infrared transmitter emission are used the varying level of the described delay mask signal of representative.