CN101909220B - Stereoscopic image display system, display and backlight module control method thereof - Google Patents

Abstract

The invention relates to a stereoscopic image display system, a display and a backlight module control method thereof. The stereoscopic image display system comprises a display and a pair of stereoscopic image glasses with a sensor. The display comprises a backlight driver module and a backlight module, wherein the backlight driver module modulates an initial backlight driver signal to generate a modulated backlight driver signal so as to drive the backlight module to output backlight. The display simultaneously generates a left eye image and a right eye image alternatively according to a stereoscopic image signal. The sensor of the stereoscopic image glasses judges the output of the display to be the left eye image or the right eye image according to the variation of the backlight intensity.

Description

The backlight module control method of stereo-image displaying system, display and display

Technical field

The present invention is about the display that a kind of image display system, this image display system comprised and the backlight module control method of this display; Particularly a kind of stereo-image displaying system, be used to provide the display of stereopsis and the backlight module control method of this display.

Background technology

For the user is provided more real image effect, more and more displays that audience's stereoscopic visual effect can be provided appear in display industry.At this please with reference to convention stereo-image displaying system 10 shown in Figure 1.As shown in Figure 1, convention stereo-image displaying system 10 comprisesdisplay 20,computer 30 and liquidcrystal shutter glasses 40, and wherein the signal connection builds betweendisplay 20 and thecomputer 30, forcomputer 30 the stereopsis signal is transferred to display 20.Display 20 will be divided into left-eye images signal and right-eye image signal to the stereopsis signal, and wherein display will alternately produce left-eye images and right-eye image according to the stereopsis signal.

As shown in Figure 1, display 20 and liquidcrystal shutter glasses 40 have sync signal reflector 21 andsync signal receiver 41 respectively, and wherein sync signal reflector 21 is according to sync signal emission infrared ray.In other words, sync signal reflector 21 converts sync signal to infrared ray from electric signal.Sync signal receiver 41 is used for receiving infrared-ray learning that the image thatpresent display 20 is produced is left-eye images or right-eye image, with the unlatching ofleft eye shutter 42 andright eye shutter 43 in the further control liquidcrystal shutter glasses 40 and close.

So visible, liquidcrystal shutter glasses 40 judges that with motor synchronizing signal reflector 21 induction sync signals and according to sync signal the image ofdisplay 20 is left-eye images or right-eye image instantly.Liquidcrystal shutter glasses 40 will be whendisplay 20 produces left-eye images turns to and opensleft eye shutter 42 respectively and closeright eye shutter 43 by driving liquid crystal.Likewise, liquidcrystal shutter glasses 40 will drive liquid crystal and turn to and closeleft eye shutter 42 and openright eye shutter 43 whendisplay 20 produces right-eye images.So visible, liquidcrystal shutter glasses 40 makes audience's eyes accept left-eye images and right-eye image respectively by the open and close shutter, has stereoscopic visual effect further to make the audience.

Install sync signal reflector 21 additional for the transmitting synchronous signal andsync signal receiver 41 will increase the cost of convention stereo-image displaying system 10 and lower its market competitiveness.In addition, the relative position of sync signal reflector 21 andsync signal receiver 41 need be fixed to guarantee the stability of sync signal transmission.Yet above-mentioned relative position will not stop to change because of moving of audience position.Therefore regular meeting is stopped because of infrared ray or ultrared undercapacity can't be correctly carries out with the sync signal reflector 21 ofdisplay 20 synchronously duringsync signal receiver 41.

Thus, liquidcrystal shutter glasses 40 will and be closed liquid crystal shutter because of synchronous incorrect fault open, and makes the audience can't carry out viewing and admiring of stereopsis.

Summary of the invention

The present invention's purpose is to provide a kind of stereo-image displaying system with lower cost.

Another object of the present invention is to provide a kind of and carries out the synchronous display and the backlight module control method of display through backlight with glasses for stereoscopic.

Stereo-image displaying system of the present invention comprises display and has the glasses for stereoscopic of sensor.Display is connected in computer or other electronic installations to receive stereopsis signal and left and right sides sync signal.

Wherein among the embodiment, display comprises user's initialization circuit, backlight driver module, module backlight.User's initialization circuit produces initial backlight and drives signal in order to according to user's input; Backlight driver module is electrically connected this user's initialization circuit, comes this initial backlight of modulation to drive signal to produce modulation backlight drive signal according to this left and right sides sync signal; Module backlight is electrically connected this backlight driver module, and in the corresponding display time interval of this stereopsis signal, this module backlight is exported backlight according to this modulation backlight drive signal, and this shading value backlight can change along with this modulation backlight drive signal power.

Further, display also comprises the coding module, and the coding module produces the code synchronism signal with this left and right sides sync signal coding, and this backlight driver module is superimposed to this initial backlight driving signal to this code synchronism signal to produce this modulation backlight drive signal.

Further; This code synchronism signal has at least one short pulse signal; This short pulse signal has predetermined width Ws, and corresponding in this stereopsis signal display time interval, it is dc signal that this initial backlight drives signal; This dc signal has predeterminated voltage V; This backlight driver module deducts this short pulse signal from this dc signal, makes corresponding in this stereopsis signal display time interval, and this modulation backlight drive signal has at least one voltage and is lower than this predeterminated voltage V and the width trough for this predetermined width Ws; Perhaps; The code synchronism signal has at least one short pulse signal, and this short pulse signal has predetermined width Ws, and in this stereopsis signal display time interval; It is the long pulse signal that this initial backlight drives signal; This long pulse signal has predetermined width WL and has predeterminated voltage V, and wherein width W L is greater than width Ws, and this backlight driver module deducts this short pulse signal from this long pulse signal; Make corresponding in this stereopsis signal display time interval, this modulation backlight drive signal has at least one voltage and is lower than this predeterminated voltage V and the width trough for this predetermined width Ws.

Further; This stereopsis signal comprises left-eye images signal and right-eye image signal; Wherein corresponding in this left-eye images signal display time interval, this modulation backlight drive signal has X voltage and is lower than this predeterminated voltage V and the width trough for this predetermined width Ws; In this right-eye image signal display time interval, this modulation backlight drive signal has Y voltage and is lower than this predeterminated voltage V and the width trough for this predetermined width Ws, and wherein X is different from Y.

Further, this stereopsis signal also comprises left-eye images signal and right-eye image signal, and wherein corresponding in this left-eye images signal display time interval, this voltage is lower than this predeterminated voltage V and width and comes across P1 phase place place for the trough of this predetermined width Ws; In this right-eye image signal display time interval, this voltage is lower than this predeterminated voltage V and width and comes across P2 phase place place for the trough of this predetermined width Ws, and the P1 phase place is different from the P2 phase place.

Further; Also comprise left and right sides sync-signal generator; Be electrically connected on this coding module; This left and right sides sync signal size of current that wherein receives when this coding module is during less than preset value, and this sync-signal generator is categorized as a plurality of left-eye images signals and a plurality of right-eye image signal with this stereopsis signal, and according to this left and right sides sync signal of timing sequence generating of this left side/right-eye image signal.

Among another embodiment, display receives the stereopsis signal, and this display comprises user's initialization circuit, left and right sides sync-signal generator, backlight driver module and module backlight.User's initialization circuit produces initial backlight and drives signal in order to according to user's input; Left and right sides sync-signal generator is categorized as a plurality of left-eye images signals and a plurality of right-eye image signal with this stereopsis signal, and complies with the timing sequence generating left and right sides sync signal of this left side/right-eye image signal; Backlight driver module is electrically connected this user's initialization circuit, comes this initial backlight of modulation to drive signal to produce modulation backlight drive signal according to this left and right sides sync signal; Module backlight is electrically connected this backlight driver module, and in the corresponding display time interval of this stereopsis signal, this module backlight is exported backlight according to this modulation backlight drive signal, and this shading value backlight can change along with this modulation backlight drive signal power.

Further, also comprise the coding module, the coding module produces the code synchronism signal with this left and right sides sync signal coding, and this backlight driver module is superimposed to this initial backlight driving signal to this code synchronism signal to produce this modulation backlight drive signal.

Further; This code synchronism signal has at least one short pulse signal; This short pulse signal has predetermined width Ws, and corresponding in this stereopsis signal display time interval, it is dc signal that this initial backlight drives signal; This dc signal has predeterminated voltage V; This backlight driver module deducts this short pulse signal from this dc signal, makes corresponding in this stereopsis signal display time interval, and this modulation backlight drive signal has at least one voltage and is lower than this predeterminated voltage V and the width trough for this predetermined width Ws; Perhaps; This code synchronism signal has at least one short pulse signal, and this short pulse signal has predetermined width Ws, and in this stereopsis signal display time interval; It is the long pulse signal that this initial backlight drives signal; This long pulse signal has predetermined width WL and has predeterminated voltage V, and wherein width W L is greater than width Ws, and this backlight driver module deducts this short pulse signal from this long pulse signal; Make corresponding in this stereopsis signal display time interval, this modulation backlight drive signal has at least one voltage and is lower than this predeterminated voltage V and the width trough for this predetermined width Ws.

Further; This stereopsis signal comprises left-eye images signal and right-eye image signal; Wherein corresponding in this left-eye images signal display time interval, this modulation backlight drive signal has X voltage and is lower than this predeterminated voltage V and the width trough for this predetermined width Ws; In this right-eye image signal display time interval, this modulation backlight drive signal has Y voltage and is lower than this predeterminated voltage V and the width trough for this predetermined width Ws, and wherein X is different from Y.

Further, this stereopsis signal also comprises left-eye images signal and right-eye image signal, and wherein corresponding in this left-eye images signal display time interval, this voltage is lower than this predeterminated voltage V and width and comes across P1 phase place place for the trough of this predetermined width Ws; In this right-eye image signal display time interval, this voltage is lower than this predeterminated voltage V and width and comes across P2 phase place place for the trough of this predetermined width Ws, and the P1 phase place is different from the P2 phase place.

The display floater of display will and backlightly alternately produce left-eye images and right-eye image in the different periods according to the stereopsis signal.The sensor of glasses for stereoscopic will judge that the image that display produces is left-eye images or right-eye image according to the variation of above-mentioned shading value backlight, open and close the left eye shutter and the right eye shutter of glasses for stereoscopic with correspondence.

The present invention also provides a kind of backlight module control method of display, and this display comprises user's initialization circuit, backlight driver module and module backlight, and this method comprises the following step: receive stereopsis signal and left and right sides sync signal by this display; Import according to the user by this user's initialization circuit, produce initial backlight and drive signal; Come this initial backlight of modulation to drive signal by this backlight driver module according to this left and right sides sync signal to produce modulation backlight drive signal; And in the corresponding display time interval of this stereopsis signal, export backlightly according to this modulation backlight drive signal by this module backlight, this shading value backlight can be strong and weak and change along with this modulation backlight drive signal.

Further; This display also comprises the coding module, and this left and right sides sync signal coding is produced the code synchronism signal with at least one short pulse signal, and this short pulse signal has predetermined width Ws; And corresponding in this stereopsis signal display time interval; It is dc signal that this initial backlight drives signal, and this dc signal has predeterminated voltage V, and this method comprises: this code synchronism signal of superposition and this initial backlight drive signal to produce this modulation backlight drive signal; Output has at least one voltage, and to be lower than this predeterminated voltage V and width backlight for this of the trough of this predetermined width Ws.

Further, this method comprises: calculate left-eye images signal or right-eye image signal that this trough number is judged present this stereopsis signal of display output.

As stated, display of the present invention is undertaken synchronously by the backlight next and glasses for stereoscopic that module backlight produced, and therefore need not produce the sync signal reflector and the receiver of extra hardware cost.In addition, module backlight produced backlightly more can set up stable signal with glasses for stereoscopic compared to infrared ray and be connected, and is viewing and admiring the vision quality of stereopsis to keep the user.

Can graphicly further be understood by following detailed Description Of The Invention and appended about advantage of the present invention and spirit.

Description of drawings

Shown in Figure 1 for the sketch map of convention stereo-image displaying system;

Fig. 2 A is depicted as the sketch map of stereo-image displaying system of the present invention;

Fig. 2 B is depicted as the backlight module control method of display shown in Fig. 2 A;

Fig. 3 A is depicted as the sequential chart of original backlight drive signal, code synchronism signal, modulation backlight drive signal and stereopsis display time interval in the stereo-image displaying system;

Fig. 3 B, Fig. 4, Fig. 5, Fig. 6, shown in Figure 7 be the alternate embodiment that initial backlight shown in Fig. 3 A drives signal, code synchronism signal, modulation backlight drive signal and stereopsis display time interval;

Fig. 8 A is depicted as the alternate embodiment of display shown in Fig. 2 A;

Fig. 8 B is depicted as the backlight module control method of display shown in Fig. 8 A;

Shown in Figure 9 is the algorithm that left and right sides sync-signal generator produces left and right sides sync signal in Fig. 8 A illustrated embodiment;

Figure 10 A is depicted as the alternate embodiment of display shown in Fig. 2 A; And

Figure 10 B is depicted as the backlight module control method of display shown in Figure 10 A.

Embodiment

The present invention is about the display that a kind of image display system, this image display system comprised and the backlight module control method of this display; Particularly a kind of stereo-image displaying system, be used to provide the display of stereopsis and the backlight module control method of this display.

Fig. 2 A is depicted as the sketch map of stereo-image displaying system 100 of the present invention, and wherein the stereo-image displaying system 100 of present embodiment comprisesdisplay 200 and has the glasses for stereoscopic 400 of sensor 430.In the present embodiment;Display 200 receives stereopsis signal D, left and right sides sync signal L, R and vertical synchronizing signal Vsync and produces stereopsis I according to above-mentioned signal from extraneous, and wherein stereopsis I comprises left-eye images and the right-eye image that alternately produces in the different periods.Shown in Fig. 2 A,display 200 better electrical are connected incomputer 300 receiving stereopsis signal D, left and right sides sync signal L, R and vertical synchronizing signal Vsync fromcomputer 300, but are not limited thereto;Display 200 also can be electrically connected on like CD-ROM devices such as Blu-ray Disc machine and other can provide the electronic installation of stereopsis signal D, left and right sides sync signal L, R and vertical synchronizing signal Vsync.In different embodiment,display 200 itself also can comprise hard disc or other electric memory mechanisms that is used to store stereopsis signal D.

In the embodiment shown in Fig. 2 A, glasses for stereoscopic 400 comprisesleft eye shutter 410 andright eye shutter 420, in order to receive stereopsis I.When the user put on glasses for stereoscopic 400, glasses for stereoscopic 400 needed when display 200 shows left-eye images, closedright eye shutter 420 and only openedleft eye shutter 410; And in when display 200 shows right-eye images, closeleft eye shutter 410 and only openright eye shutter 420, so that the user to be provided visual stereopsis effect.Thedisplay 200 of present embodiment carries out synchronously with glasses for stereoscopic 400 by changing the B shading value backlight that module backlight produced when producing stereopsis I.In other words, thesensor 430 of glasses for stereoscopic 400 will judge that the image ofdisplay 200 outputs is left-eye images or right-eye image according to the change of B shading value backlight.In the present embodiment,left eye shutter 410 andright eye shutter 420 comprise liquid crystal, close and open images of left and right eyes shutter 410,420 forsensor 430 turning to of liquid crystal of control after judging the images of left and right eyes image.

Shown in Fig. 2 A,display 200 comprisessignal interface 210, user'sinitialization circuit 220,coding module 230,backlight driver module 240,module backlight 250 and display floater 260.Thesignal interface 210 of present embodiment is electrically connected oncomputer 300 receiving stereopsis signal D, vertical synchronizing signal Vsync and left and right sides sync signal L, R, and stereopsis signal D and left and right sides sync signal L, R are transferred to displayfloater 260 andcoding module 230 respectively.Vertical synchronizing signal Vsyncnotice display 200 left eyes and right-eye image display time interval other initial end, what left and right sides sync signal L, R then notifieddisplay 200 output at present is left eye or right-eyeimage.Display floater 260 will receive B backlight thatmodule 250 backlight produced and alternately produce left-eye images and right-eye image according to stereopsis signal D in the different periods.

In Fig. 3 A-Fig. 5 embodiment; The initial backlight that user'sinitialization circuit 220 produces continuous current (continuous current) kenels drivessignal 500, the shading value of module 250 B backlight that produces wherein backlight and the continuous current of initialbacklight driving signal 500 big or small with become positive correlation.Whendisplay 200 dispatched from the factory, initial backlight drovesignal 500 and has the predetermined current size, adjusted the continuous current size that initial backlight drivessignal 500 but the user can see through user'sinitialization circuit 220, and then adjusted the shading value of B backlight.

In Fig. 6-Fig. 7 embodiment; The initial backlight that user'sinitialization circuit 220 produces pulse current (pulse current) kenels drivessignal 500, and the average shading (aVerage brightness) that human eye is experienced module 250 B backlight that export backlight and " pulse current is big or small " of initialbacklight driving signal 500 reach " pulse current duration " and become positive correlation.When display 200 dispatches from the factory; Initial backlight drivessignal 500 and has the predetermined pulse duration; And the user can see through " pulse current duration " length that user'sinitialization circuit 220 is adjusted initialbacklight driving signal 500, and then changes the shading value of B backlight.

Therefore the initial backlight of present embodiment drives the continuous current signal thatsignal 500 can be " size of current can be adjusted ", and it is fixing also to can be " size of current ", but " pulse current duration " adjustable pulse current signal.

Coding module 230 shown in Fig. 2 A is electrically connected onsignal interface 210 and backlight driver module 240.Vertical synchronizing signal Vsync thatcoding module 230 is accepted to be received fromcomputer 300 fromsignal interface 210 and left and right sides sync signal L, R, and producecode synchronism signal 600L (corresponding to left-eye images display time interval 710) or 600R (corresponding to right-eye image display time interval 720) respectively according to left and right sides sync signal L, R.Thecode synchronism signal 600L of present embodiment or 600R are pulse signal; In other words,coding module 230 produces plural DC pulse signal according to left and right sides sync signal L, R, but is not limited thereto.

In addition, in the present embodiment,coding module 230 is used for producingcode synchronism signal 600L or 600R respectively, but being not limited thereto according to left and right sides sync signal L, R; Like Fig. 4, Fig. 7 embodiment; Ifcomputer 300 left and right sides sync signal L, the R that are provided are exactly suitable pulse signal, then stereo-image displaying system 100 also can be directly uses left and right sides sync signal L, R and saves coding step ascode synchronism signal 600L or 600R.

In Fig. 3 A-Fig. 7 embodiment, starting point on vertical synchronizing signal Vsync decision left-eye imagesdisplay time interval 710 and right-eye imagedisplay time interval 720 time shafts, whatcode synchronism signal 600L or 600R then determined output at present is left eye or right-eye image.

Backlight driver module 240 receive simultaneously initial backlight that user'sinitialization circuit 220 produced drivecode synchronism signal 600L thatsignal 500 andcoding module 230 produced or 600R the two one of, and according to initialbacklight drive signal 500 andcode synchronism signal 600L, 600R produces in order to drive the modulationbacklight drive signal 700 ofmodule 250 backlight.In Fig. 3 A-Fig. 7 embodiment,backlight driver module 240drives signal 500 with initial backlight and deductscode synchronism signal 600L, 600R to produce modulationbacklight drive signal 700; In other words, the size of current of modulationbacklight drive signal 700 is that initial backlight drives the poor ofsignal 500 andcode synchronism signal 600L, 600R size of current, but is not limited thereto; In different embodiment,backlight driver module 240 also can drivesignal 500 andcode synchronism signal 600L by the superposition initial backlight, 600R produces modulationbacklight drive signal 700.

In the embodiment shown in Fig. 2 A;Module 250 backlight will receive modulationbacklight drive signals 700 and export B backlight according to this driving signal frombacklight driver module 240, become positive correlation like the B shading value backlight of Fig. 3 A-Fig. 5 embodiment with the size of current of modulation backlight drive signal 700.Thesensor 430 of glasses for stereoscopic 400 will judge whethercode synchronism signal 600L or 600R come across in the specific image display time interval according to the change of B shading value backlight, to judge thatdisplay floater 260 is left-eye images or right-eye image at the image of being exported instantly.

Fig. 2 B is depicted as the flow chart of the backlight module control method ofdisplay 200 of the present invention.Shown in Fig. 2 B, control method comprises step S800, receives stereopsis signal D, and wherein this control method comprises bydisplay 200 and receives stereopsis signal D and left and right sides sync signal L, R fromcomputer 300, but is not limited thereto;Display 200 also can be obtained stereopsis signal D and left and right sides sync signal L, R from other electronic installations.Display will produce left-eye images 740 signals and right-eye image signal according to stereopsis signal D, alternately produce left-eye images 740 and right-eye image for thedisplay floater 260 ofdisplay 200 in the different periods.250 of the modules backlight ofdisplay 200 are the shading values that changes B backlight according to left and right sides sync signal L, R, are left-eye images 740 or right-eye image 750 for glasses for stereoscopic 400 according to the image that B shading valuedifferentiation display floater 250 backlight is produced.

Backlight module control method of the present invention further comprises step S810, produces initial backlight and drivessignal 500 to drive the B backlight thatmodule 250 backlight produces the corresponding shading value of tool.In the present embodiment;Display 200 comprises in order to produce user'sinitialization circuit 220 that initial backlight drivessignal 500; Wherein user'sinitialization circuit 220 comprises user's set point, drivessignal 500 in order to when display 200 starts, to produce the initial backlight with predetermined current size.Yet user's alternative starts back adjustmentuser initialization circuit 220 atdisplay 200 and changes the size of current of initialbacklight driving signal 500 and the shading value of B backlight.

Backlight module control method comprises step S820 in addition; To producecode synchronism signal 600L, 600R and step S830, superpositioncode synchronism signal 600L, 600R and initialbacklight drive signal 500 to produce modulationbacklight drive signal 700 with left and right sides sync signal L, R coding.In the present embodiment,display 200 comprisescoding module 230 andbacklight driver module 240, and themodule 230 of wherein encoding producescode synchronism signal 600L, 600R in order to modulation in step S820 from left and right sides sync signal L, the R thatcomputer 300 is received.240 of backlight driver module are to be used for thatcode synchronism signal 600L, 600R superposition are drivensignal 500 in initial backlight to be actually used in the modulationbacklight drive signal 700 that drivesmodule 250 backlight with generation.

In the present embodiment,coding module 230 producescode synchronism signal 600L, the 600R of the period generation tool pulse current form of left-eye images in display 200.240 of backlight driver module arecode synchronism signal 600L, 600R and initial backlight to be drivensignal 500 subtract each other the modulationbacklight drive signal 700 that hastrough 620 with generation, and wherein above-mentionedtrough 620 andcode synchronism signal 600L, 600R have corresponding time location and time width.In addition, in the present embodiment, it is direct voltage that initial backlight drivessignal 500, but is not limited thereto; In different embodiment, initial backlight drives the voltage thatsignal 500 also can be changed into plural tool pulse mode according to the difference ofmodule 250 type of drive backlight.

In the present embodiment,coding module 230 producescode synchronism signal 600L in the period of left-eye images, but is not limited thereto.Coding module 230 alternatives producedcode synchronism signal 600R or producecode synchronism signal 600L, the 600R of different numbers respectively in two periods in the period of right-eye image.In different embodiment,coding module 230 also can producecode synchronism signal 600L, 600R at the out of phase place of above-mentioned two periods.

Modulation backlight drive signal that backlight module control method of the present invention will be producedbacklight driver module 240 instep S840 700inputs module 250 backlight to be producing B backlight, for thedisplay floater 260 ofdisplay 200 according to producing left-eye images and right-eye image according to stereopsis signal D.The shading value of B backlight becomes positive correlation with the size of current of modulationbacklight drive signal 700, and therefore B shading value backlight will change in the position of corresponding trough 620.In the present embodiment, because modulationbacklight drive signal 700 hastrough 620, therefore the shading value of B backlight incorresponding trough 620 positions will reduce accordingly.In other words, B shading value backlight also has time location and thewidth trough 620 corresponding tocode synchronism signal 600L, 600R.

In step S850;Sensor 430 on the glasses for stereoscopic 400 of the present invention will come sensing B shading value backlight to change according to Fig. 3 A-method shown in Figure 7; And then the number and the position of calculatingtrough 620 in the modulationbacklight drive signal 700, to judge that the image that display 200 is at that time produced is left-eye images or right-eye image.Left eye shutter 410 and theright eye shutter 420 that to control glasses for stereoscopic after thesensor 430 carries out corresponding unlatching and closes.

Fig. 3 A is depicted as the sequential chart that initial backlight drivessignal 500,code synchronism signal 600L, modulationbacklight drive signal 700 and stereopsis display time interval 730.Shown in Fig. 3 A, it is the continuous current signal that initial backlight drivessignal 500, and wherein initialbacklight driving signal 500 is the adjustable predetermined current 510 of user.

Shown in Fig. 3 A, left and right sides sync signal L, R are pulse current, and wherein left and right sides sync signal L, R have the pulse current of different numbers respectively in different display time intervals.In the present embodiment, left and right sides sync signal L, R have different number pulse currents respectively in left-eye imagesdisplay time interval 710 and right-eye imagedisplay time interval 720, but are not limited thereto; In different embodiment, the left and right sides sync signal L of different embodiment, R also can have the pulse current of similar number in left-eye imagesdisplay time interval 710 and right-eye image display time interval 720.In addition, left and right sides sync signal L, R are also alternative has identical or different size of current and a pulse duration.

Code synchronism signal 600L is pulse signal and pulse current with predetermined width 610.In the present embodiment, the size of current ofpredetermined current 510 is same as the pulse current size ofcode synchronism signal 600L, but is not limited thereto; As long as being enough to produce,code synchronism signal 600L pulse current size letsensor 430 detectings obtaintrough 620.

The modulationbacklight drive signal 700 of present embodiment drives the poor ofsignal 500 andcode synchronism signal 600L for initial backlight; Therefore modulationbacklight drive signal 700 will havetrough 620 at the time location corresponding tocode synchronism signal 600L, and wherein the electric current oftrough 620 is apredetermined width 610 less thanpredetermined current 510 and width.

Shown in Fig. 3 A, according to vertical synchronizing signal Vsync, left-eye images displaytime interval 710 and right-eye imagedisplay time interval 720 are alternately arranged on time shaft and composition stereopsis display time interval 730.In the present embodiment, presetcode synchronism signal 600L position corresponding to left-eye images displaytime interval 710 initial end on time shaft.So in the initial end of left-eye images displaytime interval 710, modulationbacklight drive signal 700 has correspondingtrough 620 to change, that iscode synchronism signal 600L, and does not have anytrough 620 in the right-eye imagedisplay time interval 720.

Thus, backlightly have time width when changing near the light and shade of pulse, can judge that the image that display 200 is at that time produced is a left-eye images nearpredetermined width 610 and waveform whensensor 430 detects.Glasses for stereoscopic 400 is opened the left eye shutter accordingly earlier and is closed the right eye shutter; And timing is waited until when left-eye images displaytime interval 710 finishes; Glasses for stereoscopic 400 is opened the right eye shutter again and is closed the left eye shutter, is detected up to nextcode synchronism signal 600L.

Fig. 3 B is that initial backlight shown in Fig. 3 A drives signal 500,code synchronism signal 600L, modulationbacklight drive signal 700 sequential chart at another embodiment.In the present embodiment, left and right sides sync signal L, R transfer to display 300 bycomputer 300 from different circuits respectively.In addition; Left and right sides sync signal L, R are for resulting from the pulse current of different display time interval 710,720 initial end respectively; Themodule 230 of wherein encoding will producecode synchronism signal 600L according to left and right sides sync signal L, produce modulationbacklight drive signal 700 forbacklight driver module 240.

In addition, in the embodiment shown in Fig. 3 B, left and right sides sync signal L andcode synchronism signal 600L have the timely tagmeme of different size of current and put, but are not limited thereto; In different embodiment, left and right sides sync signal L andcode synchronism signal 600L be also alternative to have the timely tagmeme of identical size of current and puts.

Shown in Figure4ly drive signal 500,code synchronism signal 600L, 600R, modulationbacklight drive signal 700 sequential chart for initial backlight at different embodiment.In the present embodiment; Thecoding module 230 ofdisplay 200 produces the pulse current of different numbers respectively so that modulationbacklight drive signal 700 has thetrough 620 of different number at different display time intervals in images of left and right eyes image display time interval 710,720, so respectively ascode synchronism signal 600L and 600R.

As shown in Figure 4, corresponding left-eye images displaytime interval 710 initial end ofcode synchronism signal 600L also have single pulse current, andcode synchronism signal 600R is in corresponding right-eye imagedisplay time interval 720 initial end and have two adjacent pulse currents.Therefore modulationbacklight drive signal 700 in images of left and right eyes image display time interval 710,720 initial end places with having atrough 620 and twoadjacent troughs 620 respectively.So sensor only need be judged the number of left-eye images displaytime interval 710, right-eye imagedisplay time interval 720 initialend place troughs 620 when sensing shading value backlight; Can judge that thedisplay 200 present images of exporting are left-eye images or right-eye image, left eye shutter or right eye shutter are just opened or closed to glasses for stereoscopic 400 accordingly.

Shown in Figure5ly drive signal 500,code synchronism signal 600L, 600R, modulationbacklight drive signal 700 sequential chart for initial backlight at another embodiment.In the present embodiment, images of left and right eyes image display time interval 710,720 has identical time span in fact.In addition, thedisplay 200 of present embodiment is distinguished the display time interval of images of left and right eyes image by changing the time location (phase place) of pulse current (code synchronism signal 600L, 600R) with respect to images of left and right eyes image display time interval 710,720 for sensor.

As shown in Figure 5,code synchronism signal 600L, 600R all only have single pulse current in left-eye images displaytime interval 710 and in the right-eye image display time interval 720.Yet; Above-mentioned two pulse currents correspond respectively to the initial end of left-eye images displaytime interval 710 and the end of right-eye imagedisplay time interval 720; So codesynchronism signal 600L is longer to thecode synchronism signal 600R interval period, andcode synchronism signal 600R is shorter to thecode synchronism signal 600L interval period.So when sensor detects two pulse currents and interval period subcritical value; Be that the 2nd pulse current of decidable iscode synchronism signal 600L; Corresponding to the initial end of left-eye images displaytime interval 710, and the image exported of display was a left-eye images at that time.Glasses for stereoscopic 400 is just openedleft eye shutter 410 accordingly earlier and is closedright eye shutter 420; And timing is waited until when left-eye images displaytime interval 710 finishes; Glasses for stereoscopic 400 is openedright eye shutter 420 again and is closedleft eye shutter 410, is detected up to nextcode synchronism signal 600L.

Fig. 6-shown in Figure 7 is the alternate embodiment that initial backlight shown in Fig. 3 A drives signal 500,code synchronism signal 600L, 600R, modulation backlight drive signal 700.In the present embodiment; User'sinitialization circuit 220 is imported the initial backlight that produces plural pulse current form according to the user and is drivensignal 500; Produce modulationbacklight drive signal 700 forbacklight driver module 240 and drivemodule 250 generations backlight B backlight; In left-eye images displaytime interval 710 and right-eye imagedisplay time interval 720, the pulse signal that initial backlight drives signal 500 all has 90% load cycle.In other words; Thedisplay 200 of present embodiment uses pulse width modulation (Pulse Width Modulation; PWM)drive module 250 backlight; And user'sinitialization circuit 220 still can be adjusted the load cycle of pulse current through user'sinitialization circuit 220, and then changes the lightness of B backlight.

As shown in Figure 6,code synchronism signal 600L has predeterminedwidth 610, and presetcode synchronism signal 600L occurs in the position of left-eye images displaytime interval 710 initial end; Therefore modulationbacklight drive signal 700 hastrough 620 in left-eye images displaytime interval 710 initial end, and in right-eye imagedisplay time interval 720 anytrough 620 of tool not.Thus,sensor 430 as detect B shading value backlight and have when changing as thetrough 620 can judge that the image that display 200 was exported at that time is a left-eye images.Glasses for stereoscopic 400 is just openedleft eye shutter 410 accordingly earlier and is closedright eye shutter 420; And timing is waited until when left-eye images displaytime interval 710 finishes; Glasses for stereoscopic 400 is openedright eye shutter 420 again and is closedleft eye shutter 410, is detected up to nextcode synchronism signal 600L andcorresponding trough 620.

Shown in Figure7ly drive signal 500,code synchronism signal 600L, 600R, modulationbacklight drive signal 700 sequential chart for initial backlight at different embodiment.As shown in Figure 7, thecoding module 230 ofdisplay 200 produces the pulse current of different numbers respectively in images of left and right eyes image display time interval 710,720.Thus, modulationbacklight drive signal 700 will havedifferent trough 620 in images of left and right eyes image display time interval 710,720, respectively ascode synchronism signal 600L and 600R.

In the present embodiment, modulationbacklight drive signal 700 has atrough 620 and twotroughs 620 respectively in images of left and right eyes image display time interval 710,720 initialend.So sensor 430 only need be detected the number of left-eye images displaytime interval 710, right-eye imagedisplay time interval 720initial end troughs 620; Can judge that thedisplay 200 present images of exporting are left-eye images or right-eye image,left eye shutter 410 orright eye shutter 420 are just opened or closed to glasses for stereoscopic 400 accordingly.

In Fig. 3 A, Fig. 3 B, Fig. 4, Fig. 5, Fig. 6, embodiment shown in Figure 7,code synchronism signal 600L, 600R are pulse current, but are not limited thereto; In different embodiment,code synchronism signal 600L, 600R also can have like kenels such as sine wave, square wave, triangular wave and sawtooth waveforms.Thus, thetrough 620 of coding backlight drive signal also will have corresponding kenel.

Fig. 8 A is depicted as the alternate embodiment of stereo-image displaying system 100 shown in Fig. 2 A.In the present embodiment, the size of current of left and right sides sync signal equals 0, that is left and right sides sync signal does not exist; In other words,signal interface 210 is only from extraneous stereopsis signal D and the vertical synchronizing signal Vsync of receiving.

Shown in Fig. 8 A,display 200 comprises left and right sides sync-signal generator 270, is used to accept stereopsis signal D and produces left and right sides sync signal L, R according to left-eye images signal and right-eye image signal that this signal comprised.Thus, display 200 can carry out with glasses for stereoscopic 400 under the situation that stereopsis signal D and vertical synchronizing signal Vsync are only arranged synchronously.

Fig. 8 B is depicted as the backlight module control method of display shown in Fig. 8 A.Shown in Fig. 8 B, backlight module control method comprises step S860, according to the stereopsis signal produce left and right sides sync signal L, R and with its coding to producecode synchronism signal 600L, 600R.In the present embodiment,display 200 only receives stereopsis signal D and vertical synchronizing signal Vsync from computer 300.Therefore for synchronous with glasses for stereoscopic 400, left and right sides sync-signal generator 270 will produce left and right sides sync signal L, R according to stereopsis signal D, produce modulationbacklight drive signal 700 for the rear end module.Except producing left and right sides sync signal L, the R according to stereopsis signal D, the backlight module control method shown in Fig. 2 B and Fig. 8 B is equal in fact, does not give unnecessary details so do not add at this.

Shown in Figure 9 is the algorithm that left and right sides sync-signal generator produces left and right sides sync signal L, R in Fig. 8 A illustrated embodiment.In the present embodiment, when left and right sides sync-signal generator 270 receives left-eye images signal 740 that stereopsis signal D comprised and right-eye image signal 750, and uncertain what person is that left-eye images 740 and what person are right-eye images 750.Need just can distinguish left-eye images 740 and right-eye image 750 according to the following step.

Left and right sides sync-signal generator 270 carries out edge detection (Edge Detection) to left-eye images 740 and right-eye image 750 respectively.At first left and right sides sync-signal generator 270 will define the edge threshold, and wherein the edge threshold is the gap of adjacent point-to-point transmission luminous intensity (Luminous Intensity).Left and right sides sync-signal generator 270 will carry out edge detection from the two ends of left and right image 740,750 central water horizontal lines to Centromedian direction according to above-mentioned edge threshold.As shown in Figure 9, left and right sides sync-signal generator 270 will be obtained two firstmarginal points 760 respectively in the both sides of left-eye images 740.Left and right sides sync-signal generator 270 will go out firstcentral point 780 according to the position calculation of two first marginal points 760.Likewise, in the embodiment shown in fig. 9, left and right sides sync-signal generator 270 will be obtained two secondmarginal points 770 respectively in the both sides of right-eye image 750, and go out secondcentral point 790 according to second marginal point, 770 each other position calculation.

After calculating firstcentral point 780 and secondcentral point 790, left and right sides sync-signal generator 270 will compare the position of two middle positions and judge that the pairing image of those middle positions is left-eye images 740 or right-eye image 750.In the present embodiment, definition is a left-eye images 740 near right-hand 780 the corresponding images in first central point of Fig. 9, and 790 the corresponding images in second central point that define near Fig. 9 left are right-eye image 750.To judge after the left and right sides sync-signal generator 270 that the sequential of left-eye images signal and right-eye image signal arranges and produce corresponding left and right sides sync signal L, R according to the result of above-mentioned judgement, the action of encoding forcoding module 230; In different embodiment, left and right sides sync-signal generator 270 can adopt other image treatment methods to differentiate two image signals that are used to produce stereoscopic visual effect.

In addition, in the embodiment shown in fig. 9, left and right sides sync-signal generator 270 is defined as the middle position between firstmarginal point 760 with firstcentral point 780, but is not limited thereto; In different embodiment, the luminous intensity that left and right sides sync-signal generator 270 can average firstmarginal point 760 is to obtain mean value and to define the position of firstcentral point 780 according to this mean value.Likewise, left and right sides sync-signal generator 270 also can define the position of secondcentral point 790 according to the mean value of second marginal point, 770 luminous intensities.

Figure 10 A is depicted as the alternate embodiment ofdisplay 200 shown in Fig. 2 A.In the present embodiment, the left and right sides sync-signal generator 270 ofdisplay 200 is provided with preset critical, is used to judge whether that with good grounds stereopsis signal D produces the needs of left and right sides sync signal L, R.In other words, left and right sides sync-signal generator 270 can be according to the size of current of the difference in signal source and left and right sides sync signal L, R and selectivity produces left and right sides sync signal L, R voluntarily.

As left and right sides sync signal L, R during greater than preset critical,coding module 230 andbacklight driver module 240 that left and right sides sync-signal generator 270 will transfer to the rear to left and right sides sync signal L, R are for producing the modulationbacklight drive signal 700 that drivesmodule 250 backlight.Yet as left and right sides sync signal L, R during less than preset critical, left and right sides sync-signal generator 270 will produce left and right sides sync signal L, R according to stereopsis signal D with the described method of Fig. 9.

Figure 10 B is depicted as the alternate embodiment of backlight module control method shown in Fig. 2 B.In the present embodiment, backlight module control method further comprises step S910, and whether the size of current of judging left and right sides sync signal L, R less than preset critical, that is judges whether left and right sides sync signal L, R exist; In other words, step S910 is intended to judge whetherdisplay 200 only receives stereopsis signal D and vertical synchronizing signal Vsync from computer 300.Exist and greater than preset critical, this control method will directly be carried out the step of step S810 like the electric current of left and right sides sync signal L, R.On the contrary, if after judging that left and right sides sync signal L, R electric current are less than preset critical, judge that then left and right sides sync signal L, R do not exist, start left and right sides sync-signal generator 270 and produce left and right sides sync signal L, R according to left eye and right-eye image signal.

In the embodiment shown in Figure 10 B; Step S920 addresses edge detection shown in Figure 9 according to the top and judges the sequential arrangement of disconnected left-eye images signal and right-eye image signal and produce left and right sides sync signal L, R accordingly; For the action of encoding ofcoding module 230, but be not limited thereto; In different embodiment, left and right sides sync-signal generator 270 can adopt other image treatment methods to differentiate two image signals that are used to produce stereoscopic visual effect.Except producing the sync signal of the left and right sides according to stereopsis signal D, the backlight module control method shown in Fig. 2 B and Figure 10 B is equal in fact, does not give unnecessary details so do not add at this.

Though aforesaid description and diagram have disclosed preferred embodiment of the present invention, must recognize variously increase, many modifications and replace and possibly be used in preferred embodiment of the present invention, and can not break away from the spirit and the scope of the principle of the invention that defines like claim.Be familiar with this art and can know from experience the modification that the present invention possibly be used in a lot of forms, structure, layout, ratio, material, element and assembly.Therefore, this paper, should be regarded as in order to explanation the present invention in all viewpoints in embodiment that this disclosed, but not in order to restriction the present invention.Scope of the present invention should be defined by claim, and contains its legal equivalents, is not limited to previous description.

Claims (16)

1. display receives the stereopsis signal and to left and right sides sync signal that should stereopsis signal display time interval, it is characterized in that this display comprises:

User's initialization circuit in order to according to user's input, produces initial backlight and drives signal;

Backlight driver module is electrically connected this user's initialization circuit, comes this initial backlight of modulation to drive signal to produce modulation backlight drive signal according to this left and right sides sync signal; And

Module backlight is electrically connected this backlight driver module, and in the corresponding display time interval of this stereopsis signal, this module backlight is exported backlight according to this modulation backlight drive signal, and this shading value backlight can change along with this modulation backlight drive signal power.

2. display as claimed in claim 1 is characterized in that also comprising

The coding module, this coding module produces the code synchronism signal with this left and right sides sync signal coding, and this backlight driver module is superimposed to this initial backlight driving signal to this code synchronism signal to produce this modulation backlight drive signal.

3. display as claimed in claim 2 is characterized in that; This code synchronism signal has at least one short pulse signal, and this short pulse signal has predetermined width W_SAnd corresponding in this stereopsis signal display time interval; It is dc signal that this initial backlight drives signal, and this dc signal has predeterminated voltage V, and this backlight driver module deducts this short pulse signal from this dc signal; Make corresponding in this stereopsis signal display time interval, this modulation backlight drive signal has that at least one voltage is lower than this predeterminated voltage V and width is this predetermined width W_STrough; Perhaps, the code synchronism signal has at least one short pulse signal, and this short pulse signal has predetermined width W_S, and in this stereopsis signal display time interval, it is the long pulse signal that this initial backlight drives signal, this long pulse signal has predetermined width W_LAnd has predeterminated voltage V, wherein width W_LGreater than width W_S, this backlight driver module deducts this short pulse signal from this long pulse signal, makes corresponding in this stereopsis signal display time interval, and this modulation backlight drive signal has that at least one voltage is lower than this predeterminated voltage V and width is this predetermined width W_STrough.

4. display as claimed in claim 3; It is characterized in that this stereopsis signal comprises left-eye images signal and right-eye image signal; Wherein corresponding in this left-eye images signal display time interval, this modulation backlight drive signal has that X voltage is lower than this predeterminated voltage V and width is this predetermined width W_STrough; In this right-eye image signal display time interval, this modulation backlight drive signal has that Y voltage is lower than this predeterminated voltage V and width is this predetermined width W_STrough, wherein X is different from Y.

5. display as claimed in claim 3 is characterized in that this stereopsis signal also comprises left-eye images signal and right-eye image signal, and wherein corresponding in this left-eye images signal display time interval, this voltage is lower than this predeterminated voltage V and width is this predetermined width W_STrough come across P1 phase place place; In this right-eye image signal display time interval, this voltage is lower than this predeterminated voltage V and width is this predetermined width W_STrough come across P2 phase place place, the P1 phase place is different from the P2 phase place.

6. display as claimed in claim 2; It is characterized in that further comprising left and right sides sync-signal generator; Be electrically connected on this coding module; This left and right sides sync signal size of current that wherein receives when this left and right sides sync-signal generator is during less than preset value, and this sync-signal generator is categorized as a plurality of left-eye images signals and a plurality of right-eye image signal with this stereopsis signal, and according to this left and right sides sync signal of timing sequence generating of this left side/right-eye image signal.

7. a stereo-image displaying system is characterized in that this stereo-image displaying system comprises

Like any described display in the claim 1 to 6; And

Glasses for stereoscopic has sensor, and this this shading value backlight of sensor detecting changes, and judges the left-eye images signal or the right-eye image signal of this this stereopsis signal of display output.

8. the backlight module control method of a display, this display comprises user's initialization circuit, backlight driver module and module backlight, it is characterized in that this method comprises the following step:

Receive stereopsis signal and left and right sides sync signal by this display;

Import according to the user by this user's initialization circuit, produce initial backlight and drive signal;

Come this initial backlight of modulation to drive signal by this backlight driver module according to this left and right sides sync signal to produce modulation backlight drive signal; And

In the corresponding display time interval of this stereopsis signal, to export backlightly according to this modulation backlight drive signal by this module backlight, this shading value backlight can be strong and weak and change along with this modulation backlight drive signal.

9. method as claimed in claim 8 is characterized in that this display also comprises the coding module, and this coding module produces the code synchronism signal with at least one short pulse signal with this left and right sides sync signal coding, and this short pulse signal has predetermined width W_S, and corresponding in this stereopsis signal display time interval, it is dc signal that this initial backlight drives signal, and this dc signal has predeterminated voltage V, and this method comprises:

This code synchronism signal of superposition and this initial backlight drive signal to produce this modulation backlight drive signal;

Output has that at least one voltage is lower than this predeterminated voltage V and width is this predetermined width W_SThis of trough backlight.

10. method as claimed in claim 9 is characterized in that this method comprises:

Calculate this trough number and judge the left-eye images signal or the right-eye image signal of present this stereopsis signal of display output.

11. a display receives the stereopsis signal, it is characterized in that this display comprises:

User's initialization circuit in order to according to user's input, produces initial backlight and drives signal;

Left and right sides sync-signal generator is categorized as a plurality of left-eye images signals and a plurality of right-eye image signal with this stereopsis signal, and complies with the timing sequence generating left and right sides sync signal of this left side/right-eye image signal;

Backlight driver module is electrically connected this user's initialization circuit, comes this initial backlight of modulation to drive signal to produce modulation backlight drive signal according to this left and right sides sync signal; And

Module backlight is electrically connected this backlight driver module, and in the corresponding display time interval of this stereopsis signal, this module backlight is exported backlight according to this modulation backlight drive signal, and this shading value backlight can change along with this modulation backlight drive signal power.

12. display as claimed in claim 11; It is characterized in that also comprising the coding module; This coding module produces the code synchronism signal with this left and right sides sync signal coding, and this backlight driver module is superimposed to this initial backlight driving signal to this code synchronism signal to produce this modulation backlight drive signal.

13. display as claimed in claim 12 is characterized in that this code synchronism signal has at least one short pulse signal, this short pulse signal has predetermined width W_SAnd corresponding in this stereopsis signal display time interval; It is dc signal that this initial backlight drives signal, and this dc signal has predeterminated voltage V, and this backlight driver module deducts this short pulse signal from this dc signal; Make corresponding in this stereopsis signal display time interval, this modulation backlight drive signal has that at least one voltage is lower than this predeterminated voltage V and width is this predetermined width W_STrough; Perhaps, this code synchronism signal has at least one short pulse signal, and this short pulse signal has predetermined width W_S, and in this stereopsis signal display time interval, it is the long pulse signal that this initial backlight drives signal, this long pulse signal has predetermined width W_LAnd has predeterminated voltage V, wherein width W_LGreater than width W_S, this backlight driver module deducts this short pulse signal from this long pulse signal, makes corresponding in this stereopsis signal display time interval, and this modulation backlight drive signal has that at least one voltage is lower than this predeterminated voltage V and width is this predetermined width W_STrough.

14. display as claimed in claim 13; It is characterized in that this stereopsis signal comprises left-eye images signal and right-eye image signal; Wherein corresponding in this left-eye images signal display time interval, this modulation backlight drive signal has that X voltage is lower than this predeterminated voltage V and width is this predetermined width W_STrough; In this right-eye image signal display time interval, this modulation backlight drive signal has that Y voltage is lower than this predeterminated voltage V and width is this predetermined width W_STrough, wherein X is different from Y.

15. display as claimed in claim 13; It is characterized in that this stereopsis signal also comprises left-eye images signal and right-eye image signal; Wherein corresponding in this left-eye images signal display time interval, this voltage is lower than this predeterminated voltage V and width is this predetermined width W_STrough come across P1 phase place place; In this right-eye image signal display time interval, this voltage is lower than this predeterminated voltage V and width is this predetermined width W_STrough come across P2 phase place place, the P1 phase place is different from the P2 phase place.

16. a stereo-image displaying system is characterized in that this stereo-image displaying system comprises

Like any described display among the claim 11-15; And

Glasses for stereoscopic has sensor, and this this shading value backlight of sensor detecting changes, and judges the left-eye images signal or the right-eye image signal of this this stereopsis signal of display output.

Images