CN102647601A - Stereo image processing device, stereo image displaying system and control circuit - Google Patents
Stereo image processing device, stereo image displaying system and control circuit Download PDFInfo
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Abstract
The invention discloses a stereo image processing device which can be used for effectively avoiding the crosstalk phenomenon among pictures. The stereo image processing device comprises an image processing circuit and a control circuit, wherein the image processing circuit is used for generating a stereo image signal with a first picture time sequence; the stereo image is used for controlling a panel to update; a second picture time sequence displays the stereo image picture; the second picture time sequence is delayed in comparison with the first picture time sequence; the control circuit is used for generating a backlight source control signal; and one switching time sequence of the backlight source control signal depends on the second picture time sequence.
Description
Technical field
The present invention relates to the stereo-picture treatment technology, relate in particular to and a kind ofly can effectively avoid the stereoscopic image processing device of the crosstalk phenomenon between adjacent pictures, and a stereo image display system of using this stereoscopic image devices.
Background technology
Along with the progress of science and technology, the no longer just high resolution image that people pursued, but tool third dimension and the more image demonstration of the sense of reality.At present the stereo-picture technique for displaying mainly can be divided into two kinds, and a kind of video output device glasses (for example red blue glasses, polaroid glasses or shutter glasses) of arranging in pairs or groups in the lump that need use, and another kind then only needs video output device and need not to arrange in pairs or groups any glasses.No matter be to adopt any technology, the cardinal principle that stereo-picture shows lets left eye and right eye see the pictures different picture respectively exactly, and then makes brain that two pictures different pictures of being seen respectively are combined into stereo-picture.
(Shutter Glasses) is example with shutter glasses, and it cooperates picture material, sees through the unlatching of two shutter eyeglasses or closes, and makes the user see through left eye or eye viewing separately to corresponding image.Under this situation; If the unlatching period of shutter eyeglass is suitably control not; Then might make user's left eye see and a part of see a part of left-eye image picture corresponding to the image frame of right eye and/or user's right eye; This is (Crosstalk) phenomenon of crosstalking, and can influence the quality of the stereo-picture that the user watches.
Cause the reason of crosstalking except the inaccuracy control of shutter glasses, another reason is the congenital shortcoming of lcd technology.Stereo image display system often uses LCD as video output device now, such as industry knowledge, the LCD utilization is reversed liquid crystal molecule and is controlled the printing opacity degree, and then sees through red, blue, green filter demonstration different color.The circuit characteristic of liquid crystal molecule is equivalent to electric capacity, when to liquid crystal molecule charging when showing a GTG, liquid crystal molecule can keep charging potential, treat to upgrade (showing another GTG) or a period of time next time after, just can reset to another charging potential.In addition, typical liquid crystal comprises millions of liquid crystal molecules of arranging with matrix-style, when upgrading, with behavior unit, upgrades all liquid crystal molecules line by line or alternately.Under this situation, if the renewal frequency of LCD is accurate inadequately or liquid crystal molecule tends to capacitive character, then the observer usually can see the phenomenon of ghost.Specifically; This kind ghost phenomena refers to open left eye shutter eyeglass and when closing right eye shutter eyeglass when shutter glasses; Also not complete obiteration of image frame on the LCD corresponding to right eye, so the observer can see through the situation that left eye is seen the eye image picture.This kind seen the eye image picture because of ghost phenomena causes left eye, or right eye sees the situation of left-eye image picture, also is crosstalk phenomenon.
For fear of ghost phenomena, can black plug (Black Frame Insertion) technology improve.Black insertion technology is a kind of common image processing techniques, and its basic conception is between two pictures, to insert a black picture, and in other words, liquid crystal molecule can experience once at twice reproducting periods resets, thereby can improve ghost and fuzzy (Blur) phenomenon.
Please with reference to Fig. 1, Fig. 1 is the sketch map that black insertion technology is applied to adopt the stereo display technique of shutter glasses.As shown in Figure 1, LCD display frame in regular turn 102 to 116, wherein picture 102 and 110 is corresponding to left eye, and picture 106 and 114 is corresponding to right eye, and picture 104,108,112,116 is black picture.In Fig. 1, tv representes the required time of each picture of liquid crystal display displays.120 differences according to picture of shutter glasses are switched left eye shutter and right eye shutter; As shown in Figure 1, showing left eye picture 102,110 o'clock, shutter glasses 120 is opened the left eye shutter, and closes the right eye shutter, and then the observer only has left eye can see left eye picture 102,110.Showing right eye picture 106,114 o'clock, shutter glasses 120 is opened the right eye shutter, and closes the left eye shutter, and then the observer only has right eye can see right eye picture 106,114.
Yet, behind each picture, all insert a black picture and representing the frame numbers of original picture signal to become original twice, in other words, the picture that the observer saw becomes original half the.Under this situation, the user to seeing that GTG is merely originally half the.In order to compensate the loss of image quality, use the stereo display technique of black insertion technology all must use the above renewal frequency of twice originally, employed shutter glasses also must can cooperate high speed start thereupon simultaneously.Thus, the demand of hardware specification is improved widely, relatively drawn high hardware and built the cost of putting.
In addition, human eye can not be accepted oversize black image time, otherwise can see the flicker picture.With human eye acceptable scope, the duration of black picture only can be 3～5% of the complete picture time.Under this situation, because black image time is too short, can't, accomplish in next picture the replacement of liquid crystal molecule effectively before getting into, in other words, see through the phenomenon that the black insertion technology user still can see few part ghost.
Therefore, use the stereo display technique of black insertion technology not only to need special devices, increased and built the cost of putting, still can't solve the problem of ghost simultaneously effectively.
Summary of the invention
Therefore, one of main purpose of the present invention promptly is a kind of stereoscopic image processing device is provided, and is used to avoid the crosstalk phenomenon between adjacent pictures.
The present invention discloses a kind of stereoscopic image processing device; Comprise a kind of stereoscopic image processing device; Comprise an image processing circuit; Be used to produce the three-dimensional image signal with first picture sequential, this stereo-picture is used to control that a panel upgrades and show the stereo-picture picture with the second picture sequential, and wherein this second picture sequential is compared this first picture sequential time delay; And a control circuit, be used to produce a backlight control signal, wherein one of this backlight control signal switches sequential and depends on this second picture sequential.
The present invention discloses a kind of stereoscopic image processing device in addition, comprises an image processing circuit, is used to produce a three-dimensional image signal and a synchronous signal, and wherein this synchronizing signal is associated with the first picture sequential of this three-dimensional image signal; And a control circuit, be used for producing a backlight control signal according to this synchronizing signal.
The present invention discloses a kind of stereo image display system in addition, comprises an image processing circuit, is used to produce the three-dimensional image signal with first picture sequential; One panel is used to receive this three-dimensional image signal upgrading, and shows the stereo-picture picture with the second picture sequential, and wherein this second picture sequential is compared this first picture sequential time delay; One control circuit is used to produce a backlight control signal, and wherein one of this backlight control signal switching sequential depends on this second picture sequential; And a backlight, the control that is used to receive this backlight control signal is opened or is closed.
The present invention discloses a kind of stereo image display system in addition, comprises an image processing circuit, is used to produce a three-dimensional image signal and a synchronous signal, and wherein this synchronizing signal is associated with the first picture sequential of this three-dimensional image signal; One panel is used for according to this three-dimensional image signal to show the stereo-picture picture; One control circuit is used for producing a backlight control signal according to this synchronizing signal; And a backlight, the control that is used to receive this backlight control signal is opened or is closed.
The present invention discloses a kind of control circuit that is used for stereo vision system in addition, comprises a synchronous block, is used to receive a synchronous signal, and this synchronizing signal defines one first picture sequential of a stereo-picture; One postpones block, be used for according to this first picture sequential and a time of delay to produce a control signal, sequential is switched in this control signal definition one; And a backlight control block, being used for according to this control signal to produce a backlight control signal, this backlight control signal is used to control a backlight and opens or close with this switching sequence.
The present invention is according to the image display frequency; Control back light system running is just opened respectively after making back light system accomplish the renewal of each picture at display panels, and each time of opening across the demonstration that is less than two pictures during; Thus; The user can not see still has not news more of picture, reduces crosstalk phenomenon effectively, and then promotes the three-dimensional imaging effect.
Description of drawings
Fig. 1 is for being applied to black insertion technology to adopt the sketch map of the stereo display technique of shutter glasses.
Fig. 2 A is the square Organization Chart of the embodiment of the invention one three-dimensional display system.
Fig. 2 B is the embodiment of the invention one schematic flow sheet of the function mode of device synchronously.
Fig. 3 is the configuration diagram of an embodiment of the coherent signal waveform of three-dimensional display system.
Wherein, description of reference numerals is following:
200 panels
201 image processing circuits
202 time schedule controllers
203 panel drive circuits
204 backlights
206 liquid crystal driver module
208 shutter glasses
210 control circuits
2102 synchronous blocks
2104 postpone block
2106 backlights control block
2042 backlight drive modules
2044 light emitting modules
2082 shutter controllers
2,084 first shutter devices
2,086 second shutter devices
CTRL_SG shutter glasses control signal
CTRL_BL backlight control signal
The CTRL control signal
Field_R right eye picture cycle
Field_L left eye picture cycle
Field_R ' right eye picture cycle
Field_L ' left eye picture cycle
The V_sync vertical synchronizing signal
The H_sync horizontal-drive signal
The IMG_SIG three-dimensional image signal
LT backlight drive signal
The fast gate drive signal of ST_1
The fast gate drive signal of ST_2
T_d time of delay
During the T_blk vertical blank
During T_dis shows
During the T_blk ' vertical blank
During T_dis ' shows
Embodiment
Please with reference to Fig. 2 A, Fig. 2 A is the square Organization Chart according to the stereo image display system 20 of an embodiment.Stereo image display system 20 comprises an image processing circuit 201, a panel (being display panels for example) 200, one backlight 204 and a control circuit 210.Image processing circuit 201 comprises a time schedule controller 202 and a panel drive circuit 203.In the time will playing the view data IMG_DATA of a figure image source; Time schedule controller 202 can be handled view data IMG_DATA; And the three-dimensional image signal IMG_SIG of output correspondence makes panel drive circuit 206 can drive panel 200 according to this and shows corresponding picture to panel drive circuit 206.In addition; Time schedule controller 202 also can further be exported vertical synchronizing signal V_sync and horizontal-drive signal H_sync to panel drive circuit 206; Make panel drive circuit 206 can drive panel 200 according to this and show corresponding stereo-picture picture; Wherein horizontal-drive signal H_sync is relevant to the image update frequency of display panels 212 each row pixel, and vertical synchronizing signal V_sync then is relevant to the image update frequency of each picture.In other words, in this embodiment, vertical synchronizing signal V_sync is used to define the picture sequential of three-dimensional image signal IMG_SIG.It should be noted that; Panel 200 is after receiving three-dimensional image signal IMG_SIG; Liquid crystal molecule on the panel is updated to and shows that the stereo-picture picture needs spended time; Therefore has the first picture sequential at this definition three-dimensional image signal IMG_SIG; Institute's stereoscopic images displayed picture then had the second picture sequential after panel 200 upgraded and accomplishes, and wherein this second picture sequential is compared this first picture sequential time delay, and the time that postpones comprises the liquid crystal reaction time required when panel 200 upgrades.
In addition, backlight 204 comprises a backlight drive module 2042 and a light emitting module 2044.Light emitting module 2044 can be light-emitting diode (Light Emitting Diode, LED), cold-cathode tube (ColdCathode Fluorescent Lamp, light-source generation device such as CCFL).Backlight drive module 2042 is through being configured to produce a backlight drive signal LT, with the keying of control light emitting module 2044
For the unlatching of control backlight 204 or close, the vertical synchronizing signal V_sync that time schedule controller 202 is produced can export control circuit 210 in addition to, makes control circuit 210 produce a backlight control signal CTRL_BL according to this and gives backlight drive module 2042.Backlight drive module 2042 can produce backlight drive signal LT according to backlight control signal CTRL_BL then.No matter be backlight control signal CTRL_BL or backlight drive signal LT, all can periodically switch to opening and closed condition, with the open and close of control switch module 2044.
It should be noted that; Hold the above; Because the second picture sequential of institute's stereoscopic images displayed picture lagged behind the first picture sequential of three-dimensional image signal IMG_SIG after panel 200 upgraded and accomplishes; Therefore when the switching sequence of configuration backlight control signal CTRL_BL, preferably decide according to the second picture sequential.For realizing this purpose; In a preferred embodiment; In the process that produces backlight control signal CTRL_BL; Control circuit 210 also upgrades required time (being the liquid crystal reaction time for example) according to panel 200, to produce backlight control signal CTRL_BL except that according to the defined first picture sequential of vertical synchronizing signal V_sync.Thus, the switching sequence of backlight control signal CTRL_BL promptly can be depending on this second picture sequential.
Please turn to 2B with reference to figure; Fig. 2 B is the sketch map of an embodiment of the coherent signal waveform of stereo image display system 20, more to understand three-dimensional image signal IMG_SIG among Fig. 2 A, panel 200 through upgrading the sequential relationship between institute's stereoscopic images displayed pictures and the backlight drive signal LT.It should be noted that because the sequential of backlight drive signal LT corresponds to the sequential of backlight control signal CTRL_BL, therefore can analogize the sequential relationship of backlight control signal CTRL_BL easily, seldom give unnecessary details at this by the explanation of Fig. 2 B.
Shown in Fig. 2 B; Institute's stereoscopic images displayed picture was made up of right eye picture Field_R that replaces and left eye picture Field_L after panel 200 upgraded and accomplishes; And similarly, three-dimensional image signal IMG_SIG is made up of right eye picture Field_R ' that replaces and left eye picture Field_L '.Yet the second picture sequential of stereo-picture picture has the situation of delay compared to the first picture sequential of three-dimensional image signal IMG_SIG.In addition, permanent in opening the crosstalk phenomenon that is caused for fear of backlight, configurable backlight 204 is done periodic open and close with the picture conversion.Preferably; In can be during defined each picture of this second picture sequential; Backlight drive signal LT (or backlight control signal CTRL_BL) is opened; Also promptly be converted to an opening (for example being high potential state), and the number of times that converts opening in each picture into is preferably once by a closed condition (for example for low-potential state).Thus, when backlight 204 was opened, panel 200 had been accomplished frame update, and the user can not see the part that a last picture (for another picture) does not upgrade as yet as a result, and the crosstalk phenomenon of a supreme picture takes place.
More specifically explanation, like Fig. 2 B, the T_dis T_blk during the vertical blank of being separated by during the demonstration of two adjacent pictures of three-dimensional image signal IMG_SIG.Similarly, the T_dis ' T_blk ' during the vertical blank of being separated by during the demonstration of two adjacent pictures of 200 stereoscopic images displayed pictures of panel.In order effectively to take precautions against crosstalk phenomenon, under preferred situation, can arrange backlight drive signal LT during the demonstration of stereo-picture picture T_dis ' at the beginning the time or during in unlatching, and at least a portion of T_dis ' is kept opening in the time during showing.Or, in other alternate embodiment, can be in advance with opening time of backlight 204 point, also can arrange backlight drive signal LT extra during vertical blank the time in latter stage of T_blk ' be in opening.Alternate embodiment can promote the brightness of picture, but maybe be relatively poor for the strick precaution ability of crosstalk effect.In a word, the opening time of backlight 204 point can be accordinged to design decision, and more early unlatching has high more picture brightness, but possibly sacrifice the strick precaution ability of crosstalk phenomenon.
Similarly, the shut-in time of backlight 204 point also can be accordinged to design decision, and more late unlatching has high more picture brightness, but possibly sacrifice the strick precaution ability of crosstalk phenomenon.Preferably, can arrange backlight drive signal LT during the demonstration of same picture, to close in the T_dis '.In other words, the holding time of the opening each time of backlight drive signal LT drop on single picture during in, even also backlight drive signal LT do not drop on simultaneously two adjacent pictures Field_R ' and Field_L ' during in.Therefore, backlight 204 can just be closed before next picture (for another picture) beginning, and the user can not see next picture yet as a result, and does not have the crosstalk phenomenon generation of next picture.
Yet, it should be noted that backlight 204 opening hold time be not limited to drop on single picture during in.For example, in other part embodiment, can be with shut-in time of backlight 204 after point moves slightly, also can arrange backlight drive signal LT extra during the vertical blank of next picture the time at initial stage of T_blk ' be in opening.This type embodiment can promote the brightness of picture, but maybe be relatively poor for the strick precaution ability of crosstalk effect.
In sum; Obtain best image quality in during the demonstration that can drop on single picture of holding time of the opening of backlight 204, or extend to a little forward and/or backward at most in the interregnum of same and/or the next picture of picture and sacrifice some strick precaution abilities of crosstalking a little.Yet what person no matter is in the backlight 204 neither meeting of holding time of opening each time spans to during the demonstration of plural picture.Therefore, the user can not see the picture during the demonstration of a last picture, can not see the picture during the demonstration of next picture yet, therefore can reduce the phenomenon that a last picture and next picture are crosstalked effectively.
Below to opening time of backlight 204 point more detailed explanation and embodiment more specifically are provided again.At first, about the sequential relationship between the second picture sequential and the backlight drive signal LT, can arrange the opening time point of backlight drive signal LT to equal or lag behind the demonstration of the second picture sequential during the time started point of T_dis '.More careful; In defined each picture cycle of the second picture sequential; T_dis during T_blk is converted to demonstration during first change-over time, point was by vertical blank as if the stereo-picture picture; And backlight drive signal LT then is converted to opening at second change-over time point by closed condition, then preferably can arrange second change-over time point to equal in fact or fall behind this of point first change-over time.Must notice that Fig. 2 B shows that very first time point equals the sampled situations of second time point.
In addition, about the sequential relationship between the first picture sequential and the backlight drive signal LT, can arrange the opening time point of backlight drive signal LT to lag behind the time started point of T_dis during the demonstration of the first picture sequential.Thus, backlight drive signal LT after through T_blk during the vertical blank, also will be again through one time of delay T_d just convert opening into.Generally speaking, the length that needs only T_d time of delay is accomplished the required times of frame updating greater than panel 200, can guarantee that the user can not see crosstalk phenomenon.
In sum; Owing to the liquid crystal characteristic of panel 200 needs one period reaction time to upgrade the stereo-picture picture; So after can designing panel 200 and having accomplished frame update; Just backlight 204 is opened, for example be during the demonstration of stereo-picture picture T_dis ' or at most ahead of time during the interregnum T_blk ' of same picture in unlatching.Thus, can not let the user see the part picture news more not during the demonstration of a last picture, and reduce a last phenomenon that picture is crosstalked effectively.In addition, can further design to delay before or at most during show at the interregnum T_blk ' of the next picture of stereo-picture picture and just close before the T_dis ' beginning when backlight 204.Thus, the user can not see down the picture during the demonstration of picture at a glance, and can reduce the phenomenon that next picture is crosstalked effectively.
Please refer to back Fig. 2 A.As shown in the figure, in certain embodiments, stereo image display system 20 can further comprise a shutter glasses 208.Shutter glasses 208 is used for alternately hiding the visual field corresponding to left eye and right eye, to produce the effect of stereo-picture.For example, shutter glasses 208 can comprise one first shutter device 2084, one second shutter device 2086 and a shutter controller 2082.First shutter device 2084 can be corresponding to the visual field of user's left eye, and second shutter device 2086 can be corresponding to the visual field of user's right eye.Shutter controller 2082 then is used to produce fast gate drive signal ST_1, ST_2, to control the situation that covers of first shutter device 2084 and second shutter device 2086.
Be the running of control shutter glasses 208, control circuit 210 can further produce a shutter glasses control signal CTRL_SG and provide to shutter controller 2082, makes shutter controller 2082 can produce fast gate drive signal ST_1, ST_2 according to this.It should be noted that in preferred situation it is that the switching of shutter glasses control signal CTRL_SG and fast gate drive signal ST_1, ST_2 can be arranged in pairs or groups mutually with the keying of backlight 204.For reaching this purpose, for example configurable control circuit 210 produces shutter glasses control signal CTRL_SG according to the switching sequence of backlight control signal CTRL_BL.
Please turn to reference to figure 2B once more, Fig. 2 B also shows fast gate drive signal ST_1, ST_2, more to understand the sequential relationship between other signal among fast gate drive signal ST_1, ST_2 and Fig. 2 A.It should be noted that because the sequential of fast gate drive signal ST_1, ST_2 corresponds to the sequential of shutter glasses control signal CTRL_SG, therefore can analogize the sequential relationship of shutter glasses control signal CTRL_SG easily, seldom give unnecessary details at this by the explanation of Fig. 2 B.
Shown in Fig. 2 B; Shutter glasses 208 is before backlight drive signal LT is converted to opening; Switch to another visual field from visual field of certain a glance, and after backlight drive signal LT was converted to closed condition, just the visual field from another switched back certain visual field at a glance.More specifically say it; No matter be fast gate drive signal ST_1, ST_2; Or shutter glasses control signal CTRL_SG, can have a plurality of opening time points, lay respectively at before the corresponding opening time point of backlight drive signal LT (or backlight control signal CTRL_BL); And have a plurality of shut-in time points, lay respectively at after the corresponding shut-in time point of backlight drive signal LT (or backlight control signal CTRL_BL).Under above-mentioned configuration, the operation of shutter glasses 208 can cooperate the keying of backlight 204, and then avoids crosstalk phenomenon to take place
Please refer to Fig. 3, Fig. 3 is the configuration diagram of the preferred embodiment of a control circuit 310, and this control circuit 310 is used to be embodied as the control circuit 210 shown in Fig. 2 A.Control circuit 310 can comprise a synchronous block 3102, and postpone block 3104, backlight control block 3106.Block 3102 is used for receiving a synchronous signal (being the vertical synchronizing signal V_sync that time schedule controller 202 is produced for example) synchronously, uses the definition first picture sequential.Postpone block 3104 and receive vertical synchronizing signal V_sync, and upgrade the required time (comprising the liquid crystal reaction time), produce a control signal CTRL, use the switching sequence of definition backlight control signal CTRL_BL according to the first picture sequential and panel 200.3106 of blocks of backlight control are used for according to control signal CTRL, produce backlight control signal CTRL_BL, use control backlight 204 and open or close with this switching sequence.In addition, control circuit 310 can further comprise shutter glasses control block 3108, and it is used for producing a shutter glasses control signal CTRL_SG according to the switching sequence of backlight control signal CTRL_BL.Sequential relationship about each signal can seldom be given unnecessary details at this with reference to the explanation of figure 2A and Fig. 2 B.
It is noted that; In the different embodiment of control circuit 310; Shutter glasses control block 3108 one of can use in the middle of vertical synchronizing signal V_sync, control signal CTRL and the backlight control signal CTRL_BL and to produce this shutter glasses control signal CTRL_SG and get final product, and is not limited to receive backlight control signal CTRL_BL and could produces shutter glasses control signal CTRL_SG.In addition, backlight control block 3106 shown in Figure 3 can be integrated mutually with shutter glasses control block 3108, two blocks and maybe can separate or independent the setting, even can be provided with separately or be integrated in the different device or circuit blocks.
In addition, it is noted that also that the embodiment shown in Fig. 2 A only is used for an illustrative purposes, all various variations of being done according to this all belong to category of the present invention.For example, in the embodiment shown in Fig. 2 A, display timing generator controller 202 need provide vertical synchronizing signal V_sync and horizontal-drive signal H_sync to panel drive circuit 206.Yet; In other part embodiment; Itself promptly contains the relevant information of picture sequential three-dimensional image signal IMG_SIG, so panel drive circuit 206 can be accepted three-dimensional image signal IMG_SIG merely and do not receive vertical synchronizing signal V_sync and horizontal-drive signal H_sync can operate.
In addition, also it is noted that, more than is to produce with the vertical synchronizing signal V_sync that control circuit 210 reception time schedule controllers 202 are produced.Yet; The present invention is not limited thereto, as long as offer control circuit 201 any synchronizing signals, and this synchronizing signal has the information of the first picture sequential of three-dimensional image signal IMG_SIG; Or the information of the second picture sequential of stereo-picture picture, all can implement.
In addition, it is noted that also that the foregoing description can have all different enforcement aspects.For example, image processing circuit 201 when not required sequence controller 202 and panel drive circuit 206 both have concurrently, be set to the pictures different treatment circuit and can time schedule controller 202 or panel drive circuit be left in 20 minutes.In other words, if image processing circuit comprise in the middle of time schedule controller 202 and the panel drive circuit 206 at least in the lump synchronizing signal can be provided.In addition, control circuit 210 also can be integrated or be arranged in the different device, is to be integrated in time schedule controller 202 or the panel drive circuit 206 for example.And in different embodiment; Between backlight 204 and the control circuit 210; Or the control circuit 210 and signal communicating between the image processing circuit not of the same race of synchronizing signal is provided, all can see through wired or wireless communication modes such as entity circuit, infrared signal, radiofrequency signal and realize.
In addition, backlight control block 3106 shown in Figure 3 can be integrated mutually with shutter glasses control block 3108, two blocks and maybe can separate or independent the setting, even can be provided with separately or be integrated in the different device or circuit blocks.For example,, all can be integrated in time schedule controller 202 or the panel drive circuit 206 no matter be backlight control block 3106 and shutter glasses control block 3108, in addition respectively can and be arranged in backlight 204 and the shutter glasses 208.And in different embodiment; Between backlight 204/ shutter glasses 208 and the control circuit 210; Or backlight control block 3106/ shutter glasses control block 3108 and providing between the image processing circuit not of the same race of synchronizing signal; Or between shutter glasses control block and the backlight control block ... Or the like signal communicating, all can see through wired or wireless communication modes such as entity circuit, infrared signal, radiofrequency signal and realize.
On the other hand, in stereo vision system 20, time schedule controller 202 also can adopt black insertion technology to strengthen the stereo display effect, and it does not conflict with control circuit 210, does not influence the running of control circuit 210 yet.And backlight drive module 2042 is except the keying according to backlight control signal CTRL_BL control light emitting module 2044, the signal that also can be exported according to time schedule controller 202 in addition, the luminous intensity (being brightness) of control light emitting module 2044 or start-up time etc.The foregoing description all can be accordinged to design requirement, and combination in any collocation or variation.
In sum; In the prior art, backlight does not does not periodically open and close, but in continuous pictures, keeps unlatching; The time of also promptly opening across two demonstrations more than the picture during, and cause the user usually can see the phenomenon that the eyes picture interferes with each other.In comparison, the foregoing description is according to the image display frequency, and the control back light system operates; Make back light system after the renewal of each picture of display panels completion, just open respectively; And each time of opening across the demonstration that is less than two pictures during, thus, the user can not see still has not news more of picture; Reduce crosstalk phenomenon effectively, and then promote the three-dimensional imaging effect.
The above is merely the preferred embodiments of the present invention, and all equalizations of doing according to claim of the present invention change and modify, and all should belong to covering scope of the present invention.
Claims (36)
1. stereoscopic image processing device comprises:
One image processing circuit; Be used to produce a three-dimensional image signal with first picture sequential; This three-dimensional image signal is controlled that a panel upgrades and is shown the stereo-picture picture with the second picture sequential, and wherein this second picture sequential is compared this first picture sequential time delay; And
One control circuit is used to produce a backlight control signal, and wherein one of this backlight control signal switching sequential depends on this second picture sequential.
2. stereoscopic image processing device as claimed in claim 1 is characterized in that, during defined each picture of this second picture sequential in, this backlight control signal is converted to an opening by a closed condition.
3. stereoscopic image processing device as claimed in claim 2 is characterized in that, the holding time across during the demonstration that is less than two pictures of the opening each time of this backlight control signal.
4. stereoscopic image processing device as claimed in claim 1; It is characterized in that; Defined each picture cycle of this second picture sequential comprises during an interregnum and the demonstration, and at least a portion time of this backlight control signal during the demonstration of each picture is in this opening.
5. stereoscopic image processing device as claimed in claim 4 is characterized in that, this backlight control signal also is in an opening at least a portion time of the interregnum of same or an adjacent pictures.
6. stereoscopic image processing device as claimed in claim 1; It is characterized in that; In defined each picture cycle of this second picture sequential; This stereo-picture picture one first change-over time o'clock be converted to by an interregnum one show during, and this backlight control signal by one second change-over time point be converted to an opening by a closed condition, wherein this, point equaled in fact or backwardness this of point first change-over time second change-over time.
7. stereoscopic image processing device as claimed in claim 1 is characterized in that, this control circuit is according to this first picture sequential of this three-dimensional image signal and produce this backlight control signal a time of delay.
8. stereoscopic image processing device as claimed in claim 7 is characterized in that, depends on the liquid crystal reaction time that this panel updating is required this time of delay.
9. stereoscopic image processing device as claimed in claim 1; It is characterized in that; In defined each picture cycle of this first picture sequential; This three-dimensional image signal one first change-over time o'clock be converted to by an interregnum one show during, and this backlight control signal by one second change-over time point be converted to an opening by a closed condition, wherein this second change-over time point backwardness this of point first change-over time.
10. stereoscopic image processing device as claimed in claim 1 is characterized in that, this control circuit is also according to producing a shutter glasses control signal one of in the middle of this backlight control signal and this three-dimensional image signal.
11. stereoscopic image processing device as claimed in claim 10; It is characterized in that; This shutter glasses control signal has a plurality of opening time points; Lay respectively at before the corresponding opening time point of this backlight control signal, and have a plurality of shut-in time points, lay respectively at after the corresponding shut-in time point of this backlight control signal.
12. stereoscopic image processing device as claimed in claim 1; It is characterized in that; This image processing circuit also produces a synchronous signal that is associated with this first picture sequential of this three-dimensional image signal, and this control circuit uses this synchronizing signal to produce this backlight control signal.
13. a stereoscopic image processing device comprises:
One image processing circuit is used to produce a three-dimensional image signal and a synchronous signal, and wherein this synchronizing signal is associated with the first picture sequential of this three-dimensional image signal; And
One control circuit is used for producing a backlight control signal according to this synchronizing signal.
14. stereoscopic image processing device as claimed in claim 13 is characterized in that, control circuit also produces this backlight control signal according to the liquid crystal reaction time.
15. stereoscopic image processing device as claimed in claim 13; It is characterized in that; In each picture; This synchronizing signal one first change-over time o'clock be converted to by an interregnum one show during, and this backlight control signal one second change-over time point be converted to an opening by a closed condition, this second time point backwardness this of point wherein first change-over time.
16. a stereo image display system comprises:
One image processing circuit is used to produce the three-dimensional image signal with first picture sequential;
One panel is used to receive this three-dimensional image signal upgrading, and shows the stereo-picture picture with the second picture sequential, and wherein this second picture sequential is compared this first picture sequential time delay;
One control circuit is used to produce a backlight control signal, and wherein one of this backlight control signal switching sequential depends on this second picture sequential; And
One backlight, the control that is used to receive this backlight control signal is opened or is closed.
17. stereo image display system as claimed in claim 16 is characterized in that, during defined each picture of this second picture sequential in, this backlight control signal is converted to an opening by a closed condition.
18. stereo image display system as claimed in claim 17 is characterized in that, the holding time across during the demonstration that is less than two pictures of the opening each time of this backlight control signal.
19. stereo image display system as claimed in claim 16; It is characterized in that; Defined each picture cycle of this second picture sequential comprises during an interregnum and the demonstration, and at least a portion time of this backlight control signal during the demonstration of each picture is in this opening.
20. stereo image display system as claimed in claim 19 is characterized in that, this backlight control signal also is in an opening at least a portion time of the interregnum of same or an adjacent pictures.
21. stereo image display system as claimed in claim 16; It is characterized in that; In defined each picture cycle of this second picture sequential; This stereo-picture picture one first change-over time o'clock be converted to by an interregnum one show during, and this backlight control signal one second change-over time point be converted to an opening by a closed condition, wherein this, point equaled in fact or backwardness this of point first change-over time second change-over time.
22. stereo image display system as claimed in claim 16 is characterized in that, this control circuit is according to this first picture sequential of this three-dimensional image signal and produce this backlight control signal a time of delay.
23. stereo image display system as claimed in claim 22 is characterized in that, depends on the liquid crystal reaction time that this panel updating is required this time of delay.
24. stereo image display system as claimed in claim 23; It is characterized in that; In defined each picture cycle of this first picture sequential; This three-dimensional image signal one first change-over time o'clock be converted to by an interregnum one show during, and this backlight control signal one second change-over time point be converted to an opening by a closed condition, wherein this, point fell behind that put this first change-over time at least should time of delay second change-over time.
25. stereo image display system as claimed in claim 23 is characterized in that, this control circuit is also according to producing a shutter glasses control signal one of in the middle of this backlight control signal and this three-dimensional image signal.
26. stereo image display system as claimed in claim 25 is characterized in that, further comprises a shutter glasses, it opens and closes according to this shutter glasses control signal.
27. stereo image display system as claimed in claim 25; It is characterized in that; This shutter glasses control signal has a plurality of opening time points; Lay respectively at before the corresponding opening time point of this backlight control signal, and have a plurality of shut-in time points, lay respectively at after the corresponding shut-in time point of this backlight control signal.
28. stereo image display system as claimed in claim 16; It is characterized in that; This image processing circuit also produces a synchronous signal that is associated with this first picture sequential of this three-dimensional image signal, and this control circuit uses this synchronizing signal to produce this backlight control signal.
29. a stereo image display system comprises:
One image processing circuit is used to produce a three-dimensional image signal and a synchronous signal, and wherein this synchronizing signal is associated with the first picture sequential of this three-dimensional image signal;
One panel is used for according to this three-dimensional image signal to show the stereo-picture picture;
One control circuit is used for producing a backlight control signal according to this synchronizing signal; And
One backlight, the control that is used to receive this backlight control signal is opened or is closed.
30. stereoscopic image processing device as claimed in claim 29 is characterized in that, control circuit also produces this backlight control signal according to the liquid crystal reaction time.
31. stereoscopic image processing device as claimed in claim 29; It is characterized in that; In each picture; This synchronizing signal one first change-over time o'clock be converted to by an interregnum one show during, and this backlight control signal one second change-over time point be converted to an opening by a closed condition, this second time point backwardness this of point wherein first change-over time.
32. a control circuit that is used for stereo vision system comprises:
One synchronous block is used to receive a synchronous signal, and this synchronizing signal defines one first picture sequential of a stereo-picture;
One postpones block, be used for according to this first picture sequential and a time of delay to produce a control signal, sequential is switched in this control signal definition one; And
One backlight control block is used for according to this control signal to produce a backlight control signal, and this backlight control signal is used to control a backlight and opens or close with this switching sequence.
33. control circuit as claimed in claim 32 is characterized in that, depends on that a panel upgrades the required liquid crystal reaction time this time of delay.
34. control circuit as claimed in claim 32 is characterized in that, further comprises shutter glasses control block, is used for according to this switching sequence to produce a shutter glasses control signal.
35. control circuit as claimed in claim 34 is characterized in that, this shutter glasses control block one of uses in the middle of this synchronizing signal, this control signal and this backlight control signal and to produce this shutter glasses control signal.
36. control circuit as claimed in claim 34; It is characterized in that; This shutter glasses control signal has a plurality of opening time points; Lay respectively at before the corresponding opening time point of this backlight control signal, and point of a plurality of shut-in time lays respectively at after the corresponding shut-in time point of this backlight control signal.
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| CN201110039688.0A CN102647601B (en) | 2011-02-17 | 2011-02-17 | Stereo image processing device, stereo image displaying system and control circuit |
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| CN112188181A (en) * | 2019-07-02 | 2021-01-05 | 中强光电股份有限公司 | Image display device, stereoscopic image processing circuit, and synchronization signal correction method thereof |
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| US20050259064A1 (en) * | 2002-12-06 | 2005-11-24 | Michiyuki Sugino | Liquid crystal display device |
| CN101336446A (en) * | 2006-02-07 | 2008-12-31 | 深圳Tcl新技术有限公司 | Histogram detector for contrast reinforcing system |
| CN101878654A (en) * | 2007-11-28 | 2010-11-03 | 皇家飞利浦电子股份有限公司 | 3d visualization |
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| US20050259064A1 (en) * | 2002-12-06 | 2005-11-24 | Michiyuki Sugino | Liquid crystal display device |
| CN101336446A (en) * | 2006-02-07 | 2008-12-31 | 深圳Tcl新技术有限公司 | Histogram detector for contrast reinforcing system |
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| CN112188181A (en) * | 2019-07-02 | 2021-01-05 | 中强光电股份有限公司 | Image display device, stereoscopic image processing circuit, and synchronization signal correction method thereof |
| CN112188181B (en) * | 2019-07-02 | 2023-07-04 | 中强光电股份有限公司 | Image display device, stereoscopic image processing circuit and synchronization signal correction method thereof |
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