CN101909220A - Stereoscopic image display system, display and backlight module control method thereof - Google Patents
Stereoscopic image display system, display and backlight module control method thereof Download PDFInfo
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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
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.Please refer to known stereo-image displaying system 10 shown in Figure 1 at this.As shown in Figure 1, known stereo-image displaying system 10 comprises display 20, computer 30 and liquid crystal shutter glasses 40, and wherein the signal connection builds between display 20 and the computer 30, for computer 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 liquid crystal shutter glasses 40 have sync signal reflector 21 and sync 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 that present display 20 is produced is left-eye images or right-eye image, with the unlatching of left eye shutter 42 and right eye shutter 43 in the further control liquid crystal shutter glasses 40 and close.
So as seen, liquid crystal shutter glasses 40 judges that with motor synchronizing signal reflector 21 induction sync signals and according to sync signal the image of display 20 is left-eye images or right-eye image instantly.Liquid crystal shutter glasses 40 will be when display 20 produces left-eye images turns to and opens left eye shutter 42 respectively and close right eye shutter 43 by driving liquid crystal.Similarly, liquid crystal shutter glasses 40 will drive liquid crystal and turn to and close left eye shutter 42 and open right eye shutter 43 when display 20 produces right-eye images.So as seen, liquid crystal 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 and sync signal receiver 41 will increase the cost of known stereo-image displaying system 10 and lower its market competitiveness.In addition, the relative position of sync signal reflector 21 and sync 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 blocked because of infrared ray or ultrared undercapacity can't be correctly carries out with the sync signal reflector 21 of display 20 synchronously during sync signal receiver 41.
Thus, liquid crystal 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 foundation user 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 display time interval of this stereopsis signal correspondence, 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, 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; Perhaps, the code synchronism signal has at least one short pulse signal, 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, wherein width W L is greater than width Ws, 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, when wherein this left and right sides sync signal size of current that receives when this coding module is less than preset value, 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 complies with 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 foundation user 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 display time interval of this stereopsis signal correspondence, 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, 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; Perhaps, this code synchronism signal has at least one short pulse signal, 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, wherein width W L is greater than width Ws, 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 display time interval of this stereopsis signal correspondence, 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, this left and right sides sync signal coding is produced the code synchronism signal with 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, 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 this trough number and judge that present display exports the left-eye images signal or the right-eye image signal of this stereopsis signal.
As mentioned above, display of the present invention is undertaken synchronously by the backlight next and glasses for stereoscopic that module backlight produced, and does not therefore need to 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 be about the advantages and spirit of the present invention by following detailed Description Of The Invention and appended graphic being further understood.
Description of drawings
Figure 1 shows that the schematic diagram of known stereo-image displaying system;
Fig. 2 A is depicted as the schematic diagram 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, Figure 7 shows that initial backlight shown in Fig. 3 A drives the alternate embodiment of 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;
Figure 9 shows that the algorithm of left and right sides sync-signal generator generation 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 schematic diagram of stereo-image displaying system 100 of the present invention, and wherein the stereo-image displaying system 100 of present embodiment comprises display 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 in computer 300 receiving stereopsis signal D, left and right sides sync signal L, R and vertical synchronizing signal Vsync from computer 300, but are not limited thereto; Display 200 also can be electrically connected on as CD-ROM device 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 comprises left eye shutter 410 and right 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, closed right eye shutter 420 and only opened left eye shutter 410; And in when display 200 shows right-eye images, close left eye shutter 410 and only open right eye shutter 420, so that the user to be provided visual stereopsis effect.The display 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, the sensor 430 of glasses for stereoscopic 400 will judge that the image of display 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 and right eye shutter 420 comprise liquid crystal, close and open images of left and right eyes shutter 410,420 for sensor 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 comprises signal interface 210, user's initialization circuit 220, coding module 230, backlight driver module 240, module backlight 250 and display floater 260.The signal interface 210 of present embodiment is electrically connected on computer 300 with reception 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 display floater 260 and coding module 230 respectively.Vertical synchronizing signal Vsync notice display 200 left eyes and right-eye image display time interval other initial end, what left and right sides sync signal L, R then notified display 200 output at present is left eye or right-eye image.Display floater 260 will receive B backlight that module 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's initialization circuit 220 produces continuous current (continuous current) kenels drives signal 500, the shading value of module 250 B backlight that produces wherein backlight and the continuous current of initial backlight driving signal 500 big or small with become positive correlation.When display 200 dispatched from the factory, initial backlight drove signal 500 and has the predetermined current size, adjusted the continuous current size that initial backlight drives signal 500 but the user can see through user's initialization circuit 220, and then adjusted the shading value of B backlight.
In Fig. 6-Fig. 7 embodiment, the initial backlight that user's initialization circuit 220 produces pulse current (pulse current) kenels drives signal 500, and the average shading (aVerage brightness) that human eye is experienced module 250 B backlight that exports backlight and " the pulse current size " of initial backlight driving signal 500 reach " pulse current duration " and become positive correlation.When display 200 dispatches from the factory, initial backlight drives signal 500 and has the predetermined pulse duration, and the user can see through " pulse current duration " length that user's initialization circuit 220 is adjusted initial backlight driving signal 500, and then changes the shading value of B backlight.
Therefore the initial backlight of present embodiment drives the continuous current signal that signal 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.
In addition, in the present embodiment, coding module 230 is used for producing code synchronism signal 600L or 600R respectively, but being not limited thereto according to left and right sides sync signal L, R; As Fig. 4, Fig. 7 embodiment, if computer 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 as code synchronism signal 600L or 600R.
In Fig. 3 A-Fig. 7 embodiment, starting point on vertical synchronizing signal Vsync decision left-eye images display time interval 710 and right-eye image display time interval 720 time shafts, what code synchronism signal 600L or 600R then determined output at present is left eye or right-eye image.
In the embodiment shown in Fig. 2 A, module 250 backlight will receive modulation backlight drive signals 700 and export B backlight according to this driving signal from backlight driver module 240, become positive correlation as the B shading value backlight of Fig. 3 A-Fig. 5 embodiment with the size of current of modulation backlight drive signal 700.The sensor 430 of glasses for stereoscopic 400 will judge whether code 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 that display 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 of display 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 by display 200 and receives stereopsis signal D and left and right sides sync signal L, R from computer 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 the display floater 260 of display 200 in the different periods.250 of the modules backlight of display 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 value differentiation display floater 250 backlight is produced.
Backlight module control method of the present invention further comprises step S810, produces initial backlight and drives signal 500 to drive the B backlight that module 250 backlight produces the corresponding shading value of tool.In the present embodiment, display 200 comprises in order to produce user's initialization circuit 220 that initial backlight drives signal 500, wherein user's initialization circuit 220 comprises user's set point, drives signal 500 in order to produce the initial backlight with predetermined current size when display 200 starts.Yet user's alternative starts back adjustment user initialization circuit 220 at display 200 and changes the size of current of initial backlight driving signal 500 and the shading value of B backlight.
Backlight module control method comprises step S820 in addition, to produce code synchronism signal 600L, 600R and step S830, superposition code synchronism signal 600L, 600R and initial backlight drive signal 500 to produce modulation backlight drive signal 700 with left and right sides sync signal L, R coding.In the present embodiment, display 200 comprises coding module 230 and backlight driver module 240, and the module 230 of wherein encoding produces code synchronism signal 600L, 600R in order to modulation in step S820 from left and right sides sync signal L, the R that computer 300 is received.240 of backlight driver module are to be used for that code synchronism signal 600L, 600R superposition are driven signal 500 in initial backlight to be actually used in the modulation backlight drive signal 700 that drives module 250 backlight with generation.
In the present embodiment, coding module 230 produces code 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 are that code synchronism signal 600L, 600R and initial backlight driving signal 500 are subtracted each other the modulation backlight drive signal 700 that has trough 620 with generation, and wherein above-mentioned trough 620 and code synchronism signal 600L, 600R have corresponding time location and time width.In addition, in the present embodiment, it is direct voltage that initial backlight drives signal 500, but is not limited thereto; In different embodiment, initial backlight drives the voltage that signal 500 also can be changed into plural tool pulse mode according to the difference of module 250 type of drive backlight.
In the present embodiment, coding module 230 produces code synchronism signal 600L in the period of left-eye images, but is not limited thereto.Coding module 230 alternatives produced code synchronism signal 600R or produce code 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 produce code 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 produced backlight driver module 240 in step S840 700 inputs module 250 backlight to be producing B backlight, for the display floater 260 of display 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 modulation backlight drive signal 700, and therefore B shading value backlight will change in the position of corresponding trough 620.In the present embodiment, because modulation backlight drive signal 700 has trough 620, therefore the shading value of B backlight in corresponding trough 620 positions will reduce accordingly.In other words, B shading value backlight also has time location and the width trough 620 corresponding to code 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 calculating trough 620 in the modulation backlight drive signal 700, to judge that the image that display 200 is at that time produced is left-eye images or right-eye image.To control the left eye shutter 410 of glasses for stereoscopic and right eye shutter 420 after the sensor 430 carries out corresponding unlatching and closes.
Fig. 3 A is depicted as the sequential chart that initial backlight drives signal 500, code synchronism signal 600L, modulation backlight drive signal 700 and stereopsis display time interval 730.As shown in Figure 3A, it is the continuous current signal that initial backlight drives signal 500, and wherein initial backlight driving signal 500 is the adjustable predetermined current 510 of user.
As shown in Figure 3A, 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 images display time interval 710 and right-eye image display time interval 720, but are not limited thereto; In different embodiment, left and right sides sync signal L, the R of different embodiment also can have the pulse current of similar number in left-eye images display 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.
The modulation backlight drive signal 700 of present embodiment drives the poor of signal 500 and code synchronism signal 600L for initial backlight, therefore modulation backlight drive signal 700 will have trough 620 at the time location corresponding to code synchronism signal 600L, and wherein the electric current of trough 620 is a predetermined width 610 less than predetermined current 510 and width.
As shown in Figure 3A, according to vertical synchronizing signal Vsync, left-eye images display time interval 710 and right-eye image display time interval 720 are alternately arranged on time shaft and composition stereopsis display time interval 730.In the present embodiment, preset code synchronism signal 600L position corresponding to left-eye images display time interval 710 initial end on time shaft.So in the initial end of left-eye images display time interval 710, modulation backlight drive signal 700 has corresponding trough 620 to change, that is code synchronism signal 600L, and does not have any trough 620 in the right-eye image display 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 near predetermined width 610 and waveform when sensor 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 display time 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 next code synchronism signal 600L.
Fig. 3 B is that initial backlight shown in Fig. 3 A drives signal 500, code synchronism signal 600L, modulation backlight drive signal 700 sequential chart at another embodiment.In the present embodiment, left and right sides sync signal L, R transfer to display 300 by computer 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, the module 230 of wherein encoding will produce code synchronism signal 600L according to left and right sides sync signal L, produce modulation backlight drive signal 700 for backlight driver module 240.
In addition, in the embodiment shown in Fig. 3 B, left and right sides sync signal L and code 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 and code synchronism signal 600L be also alternative to have the timely tagmeme of identical size of current and puts.
Figure 4 shows that initial backlight drives signal 500, code synchronism signal 600L, 600R, modulation backlight drive signal 700 sequential chart at different embodiment.In the present embodiment, the coding module 230 of display 200 produces the pulse current of different numbers respectively so that modulation backlight drive signal 700 has the trough 620 of different number at different display time intervals in images of left and right eyes image display time interval 710,720, so respectively as code synchronism signal 600L and 600R.
As shown in Figure 4, corresponding left-eye images display time interval 710 initial end of code synchronism signal 600L also have single pulse current, and code synchronism signal 600R is in corresponding right-eye image display time interval 720 initial end and have two adjacent pulse currents.Therefore modulation backlight drive signal 700 will have a trough 620 and two adjacent troughs 620 respectively in images of left and right eyes image display time interval 710,720 initial end places.So sensor only need be judged the number of left-eye images display time interval 710, right-eye image display time interval 720 initial end place troughs 620 when sensing shading value backlight, can judge that the display 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.
Figure 5 shows that initial backlight drives signal 500, code synchronism signal 600L, 600R, modulation backlight drive signal 700 sequential chart 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, the display 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 display time 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 display time interval 710 and the end end of right-eye image display time interval 720, so code synchronism signal 600L is longer to the code synchronism signal 600R interval period, and code synchronism signal 600R is shorter to the code 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 is code synchronism signal 600L, corresponding to the initial end of left-eye images display time interval 710, and the image exported of display was a left-eye images at that time.Glasses for stereoscopic 400 is just opened left eye shutter 410 accordingly earlier and is closed right eye shutter 420, and timing is waited until when left-eye images display time interval 710 finishes, glasses for stereoscopic 400 is opened right eye shutter 420 again and is closed left eye shutter 410, is detected up to next code synchronism signal 600L.
Fig. 6-Figure 7 shows that initial backlight shown in Fig. 3 A drives the alternate embodiment of signal 500, code synchronism signal 600L, 600R, modulation backlight drive signal 700.In the present embodiment, user's initialization circuit 220 is imported the initial backlight that produces plural pulse current form according to the user and is driven signal 500, produce modulation backlight drive signal 700 for backlight driver module 240 and drive module 250 generations backlight B backlight, in left-eye images display time interval 710 and right-eye image display time interval 720, the pulse signal that initial backlight drives signal 500 all has 90% load cycle.In other words, the display 200 of present embodiment uses pulse width modulation (Pulse Width Modulation, PWM) drive module 250 backlight, and user's initialization circuit 220 still can be adjusted the load cycle of pulse current through user's initialization circuit 220, and then changes the lightness of B backlight.
As shown in Figure 6, code synchronism signal 600L has predetermined width 610, and default code synchronism signal 600L occurs in the position of left-eye images display time interval 710 initial end; Therefore modulation backlight drive signal 700 has trough 620 in left-eye images display time interval 710 initial end, and in right-eye image display time interval 720 any trough 620 of tool not.Thus, sensor 430 as detect B shading value backlight and have when changing as the trough 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 opened left eye shutter 410 accordingly earlier and is closed right eye shutter 420, and timing is waited until when left-eye images display time interval 710 finishes, glasses for stereoscopic 400 is opened right eye shutter 420 again and is closed left eye shutter 410, is detected up to next code synchronism signal 600L and corresponding trough 620.
Figure 7 shows that initial backlight drives signal 500, code synchronism signal 600L, 600R, modulation backlight drive signal 700 sequential chart at different embodiment.As shown in Figure 7, the coding module 230 of display 200 produces the pulse current of different numbers respectively in images of left and right eyes image display time interval 710,720.Thus, modulation backlight drive signal 700 will have different trough 620 in images of left and right eyes image display time interval 710,720, respectively as code synchronism signal 600L and 600R.
In the present embodiment, modulation backlight drive signal 700 has a trough 620 and two troughs 620 respectively in images of left and right eyes image display time interval 710,720 initial end.So sensor 430 only need be detected the number of left-eye images display time interval 710, right-eye image display time interval 720 initial end troughs 620, can judge that the display 200 present images of exporting are left-eye images or right-eye image, left eye shutter 410 or right 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 as kenels such as sine wave, square wave, triangular wave and sawtooth waveforms.Thus, the trough 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, encodes to produce code synchronism signal 600L, 600R according to stereopsis signal generation left and right sides sync signal L, R and with it.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 modulation backlight 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.
Figure 9 shows that the algorithm of the generation of the left and right sides sync-signal generator 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 first marginal points 760 respectively in the both sides of left-eye images 740.Left and right sides sync-signal generator 270 will go out first central point 780 according to the position calculation of two first marginal points 760.Similarly, in the embodiment shown in fig. 9, left and right sides sync-signal generator 270 will be obtained two second marginal points 770 respectively in the both sides of right-eye image 750, and go out second central point 790 according to second marginal point, 770 each other position calculation.
After calculating first central point 780 and second central 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 corresponding images in second central point of the close Fig. 9 left of definition 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 for coding 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 middle position between first marginal point 760 with first central point 780, but is not limited thereto; In different embodiment, the luminous intensity that left and right sides sync-signal generator 270 can average first marginal point 760 is to obtain mean value and to define the position of first central point 780 according to this mean value.Similarly, left and right sides sync-signal generator 270 also can define the position of second central point 790 according to the mean value of second marginal point, 770 luminous intensities.
Figure 10 A is depicted as the alternate embodiment of display 200 shown in Fig. 2 A.In the present embodiment, the left and right sides sync-signal generator 270 of display 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, left and right sides sync-signal generator 270 will transfer to the coding module 230 at rear and backlight driver module 240 to left and right sides sync signal L, R for producing the modulation backlight drive signal 700 that drives module 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 whether display 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 as 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 of coding 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 may 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 as claim.Be familiar with this skill person and can know from experience the modification that the present invention may 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 foundation user 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 display time interval of this stereopsis signal correspondence, 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, 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.
3. display as claimed in claim 2, it is characterized in that 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, 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; Perhaps, the code synchronism signal has at least one short pulse signal, 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, wherein width W L is greater than width Ws, 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.
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 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.
5. display as claimed in claim 3, 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 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.
6. display as claimed in claim 1, it is characterized in that further comprising left and right sides sync-signal generator, be electrically connected on this coding module, when wherein this left and right sides sync signal size of current that receives when this coding module is less than preset value, 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 complies with 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
As any described display in the claim 1 to 6; And
Glasses for stereoscopic has sensor, and the detecting of this sensor should shading value variation backlight, and judges that this display exports the left-eye images signal or the right-eye image signal of this stereopsis signal.
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 display time interval of this stereopsis signal correspondence, 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, it is characterized in that this display also comprises the coding module, this coding module produces the code synchronism signal with at least one short pulse signal with this left and right sides sync signal coding, 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.
10. method as claimed in claim 9 is characterized in that this method comprises:
Calculate this trough number and judge that present display exports the left-eye images signal or the right-eye image signal of this stereopsis signal.
11. a display receives the stereopsis signal, it is characterized in that this display comprises:
User's initialization circuit in order to foundation user 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 display time interval of this stereopsis signal correspondence, 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, it is characterized in that 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, 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; Perhaps, this code synchronism signal has at least one short pulse signal, 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, wherein width W L is greater than width Ws, 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.
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 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.
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 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.
16. a stereo-image displaying system is characterized in that this stereo-image displaying system comprises
As any described display among the claim 11-15; And
Glasses for stereoscopic has sensor, and the detecting of this sensor should shading value variation backlight, and judges that this display exports the left-eye images signal or the right-eye image signal of this stereopsis signal.
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