CN102663983B - 3D (three-dimensional) overvoltage confirming method, LCD (Liquid Crystal Display) driving method, LCD system and television - Google Patents
3D (three-dimensional) overvoltage confirming method, LCD (Liquid Crystal Display) driving method, LCD system and television Download PDFInfo
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Abstract
The invention discloses 3D (three-dimensional) overvoltage confirming method, an LCD (Liquid Crystal Display) driving method, an LCD system and a television and mainly aims at providing a method for precisely confirming the overvoltage parameter under a 3D state. The 3D overvoltage confirming method comprises the following steps: 1.1 measuring the brightness of a plurality of different gray scales at 0 and 255 and at the range from 0 to 255 of an LCD as reference brightness; 1.2 presetting overvoltage needed by change between two different adjacent grey scale images; 1.3 driving the display by utilizing the preset overvoltage to test the brightness of the LCD after a set time for driving of the overvoltage correspondingly as test brightness; 1.4 comparing the reference brightness with the test brightness, if not, regulating the overvoltage according to the comparison result, and returning the step 1.3, and if yes, stopping. According to the invention, the accuracy of the overvoltage is further improved, and the brightness of the LCD is effectively promoted.
Description
Technical field
The present invention relates to a kind of 3D superpotential defining method, liquid crystal display driving method, system, televisor.
Background technology
Along with the fast development of TV tech and the progress of technology, 3D TV is increasingly general and ripe, and shutter 3D TV is wherein while the full HD 3D effect of enjoyment, and relative cost performance is high, good resolution can be realized again, in existing 3D tv product, occupy the larger market share gradually.120hz shutter 3D televisor utilizes the high picture refreshing rate of its 120hz, be divided into two a two field picture the two a series of paintings faces staggered display continuously forming corresponding right and left eyes, the right eyeglass of shutter type 3 D spectacles is opened when television content display right eye picture, close the left eyeglass of shutter type 3 D spectacles simultaneously, the left eyeglass of shutter type 3 D spectacles is opened when television content display left eye picture, close the right eyeglass of shutter type 3 D spectacles simultaneously, the image seen due to right and left eyes is different, and reaches the effect that final beholder synthesizes 3D image.
Spectators more can pay close attention to the three-dimensional stereo effect of display when watching 3D TV, i.e. 3D rendering effect, and the main factor affecting 120hz shutter 3D effect is at present crosstalk (Crosstalk) and brightness.Crosstalk refers to that beholder's left eye sees should the picture material seen of right eye, or right eye sees the picture material should seeing left eye, and 3D rendering occurs that the major influence factors of crosstalk is that the sequential of lighting that liquid crystal module group backlight scans causes with the corresponding synchronously bad of liquid crystal display response time.And the low major influence factors of 3D rendering brightness is the opening time length of backlight under 3D rendering.Under 3D rendering, how to make liquid crystal molecule reach steady state (SS) faster, for the increase opening time of liquid crystal module group backlight scanning, increase the crosstalk that namely opening time can reduce 3D rendering, also the brightness of 3D rendering can be increased, and then guarantee that each frame picture can both correctly enter in the corresponding right and left eyes of beholder, generally address this problem by increasing superpotential method in advance, have superpotential question blank in each liquid crystal display, the precision of superpotential parameter directly affects speed and the accuracy of the liquid crystal deflecting element of liquid crystal display.Also do not have now a kind ofly can effectively drive the strick precaution of 3D liquid crystal display effectively to determine the method for the overvoltage value of 3D LCD TV, the accuracy of overvoltage value directly determines liquid crystal display look display effect.
Summary of the invention
For the problems referred to above, the driving method of the defining method that the invention provides a kind of overvoltage value of 3D comparatively accurately and the liquid crystal display that comprises the 3D overvoltage value obtained by the method and liquid crystal display systems, televisor.
For achieving the above object, the superpotential defining method of 3D of the present invention, comprises the steps:
1.1 measure the brightness of multiple different GTG between liquid crystal display display 0,255 and 0-255 as Benchmark brightness;
Change required superpotential between the different gray scale images of 1.2 default adjacent two frames, the different gray scale images of described adjacent two frames are an adjacent frame left-eye image and a frame eye image;
1.3 utilize the superpotential driving display preset, and the brightness that testing liquid crystal display reaches after corresponding superpotential drives the time of setting is as test brightness;
1.4 contrast Benchmark brightness and test brightness, do not meet according to comparing result adjustment superpotential, return step 1.3; Meet termination.
Further, the concrete method of testing step of the test brightness of described step 1.3 is:
2.1 input a frame left-eye image and a frame eye image of different GTG to LCDs, carry out Alternation Display;
2.2 a frame left-eye image or eye image duration, utilizes the default superpotential driving liquid crystal displays that respective image GTG is corresponding, until receive next frame left eye or eye image;
2.3 measure the brightness value of liquid crystal display display after the voltage driven one two field picture time, and this brightness value is test brightness.
Further, the adjustment method of described step 1.4 is,
If when test brightness is higher than Benchmark brightness, reduce the default superpotential value in step 1.2;
If test brightness presets superpotential value lower than improving during Benchmark brightness;
Wherein, when adjacent two two field pictures be by high gray to low gray scale variation time, superpotential value should be not more than driving voltage value corresponding to low GTG;
When adjacent two two field pictures be changed to high gray by low GTG time, the value of overdrive voltage value should be not less than driving voltage value corresponding to high gray.
Particularly, described test brightness, during image by the different GTG of Alternation Display two frame on a liquid crystal display, timed delivery, for the right and left eyes eyeglass opening shutter glasses, connects nitometer by the brightness probe on it and records.
For achieving the above object, the driving method of liquid crystal display of the present invention, is characterized in that: comprise the steps:
5.1 determine superpotential in superpotential question blank, and described superpotential is determined by the arbitrary described superpotential defining method of 3D of Claims 1-4;
5.2 store superpotential question blank;
5.3 receive image conversion signal;
The 5.4 gray scale variation values determining adjacent current frame image and target frame image;
5.5 by inquiry superpotential question blank, calculates the superpotential needed for image gray-scale level change corresponding to described gray scale variation value;
5.6 utilize described superpotential driving liquid crystal displays, until liquid crystal display receives next frame picture signal, the change of a two field picture occur.
Further, also should step be comprised before described step 5.3: whether more adjacent two two field pictures the step of gray scale variation occurs,
If gray scale variation occurs carry out step 5.4, and by time of described superpotential driving liquid crystal displays one two field picture; Return step 5.2;
If not there is gray scale variation, utilize the voltage driven liquid crystal display that present frame GTG is corresponding, until described liquid crystal display receives the picture signal of the different GTG of a frame.
Especially, the backlight of described liquid crystal display completes after superpotential drives in liquid crystal display and synchronously opens.
For achieving the above object, liquid crystal display systems of the present invention, comprises liquid crystal display, image control unit, GTG acquiring unit, acquiring unit of overdriving, Voltag driving circuit, backlight and backlight source driving circuit, wherein,
Described liquid crystal display, for showing adjacent left-eye image and eye image;
Described image control unit, for the synchronizing signal that output image figure signal and control shutter glasses right and left eyes eyeglass are opened;
Described GTG acquiring unit, for obtaining an adjacent frame left-eye image and the grey decision-making of a frame eye image, and judge whether two adjacent two field pictures gray scale variation occur, to overdrive described in comparative result is exported to acquiring unit, if the image generation gray scale variation that two frames are adjacent, determine the changing value of adjacent two two field picture grey decision-making, and this value is outputted to acquiring unit of overdriving;
Described acquiring unit of overdriving, if there is gray scale variation, for inquiring about the superpotential question blank of storage, obtaining the overvoltage value changed for image, and this result is outputted to Voltag driving circuit, control driving circuit and export corresponding superpotential by driving algorithm; If not there is gray scale variation, this result is outputted to Voltag driving circuit, control driving circuit and export the corresponding voltage of two adjacent two field pictures; Wherein, the overvoltage value in described superpotential question blank is obtained by the arbitrary described superpotential defining method of 3D of claim 1-5.
Described Voltag driving circuit, exports liquid crystal display described in corresponding voltage driven for the voltage control signal exported by acquiring unit of overdriving described in reception;
Described shutter glasses, comprises a left eyeglass lens and a right eye eyeglass, and for receiving the synchronizing signal that described image control unit exports, fluid,matching crystal display display left-eye image and eye image alternately open right and left eyes eyeglass.
Described backlight, is adjacent to described liquid crystal display, for providing required brightness for described liquid crystal display;
Described backlight source driving circuit, synchronously opens in liquid crystal display for controlling described backlight after liquid crystal display completes superpotential driving.
For achieving the above object, televisor of the present invention, comprises liquid crystal display systems, the liquid crystal display systems that described liquid crystal display systems is above-mentioned.
The present invention is applied to shutter 3D LCD TV, by the optimization to the overvoltage value in the 3D superpotential question blank be located in LCD TV, improve superpotential degree of accuracy, in the overvoltage value that liquid crystal display is required in procedure for displaying, by question blank of overdriving described in use inquiry, and utilize obtaining of mean difference algorithm.Having arrived due to the overvoltage value as superpotential parameter is optimized with accurate, therefore superpotential have also been obtained in the driving process of liquid crystal display needed for reality calculated is optimized with accurate, shorten the deflection period of liquid crystal molecule, what make the liquid crystal molecule on liquid crystal panel can reach steady state (SS) faster, increase backlight opening time, add brightness during liquid crystal display display 3D picture, effectively decrease the crosstalk of the right and left eyes image of shutter 3D LCD TV, improve the image quality of shutter LCD TV.
Accompanying drawing explanation
Fig. 1 is at the driving voltage curve do not increased under over-voltage condition and liquid crystal deflecting element curve;
Fig. 2 is at the driving voltage curve increased under over-voltage condition and liquid crystal deflecting element curve;
Fig. 3 is the process flow diagram of the superpotential defining method of the present invention;
Fig. 4 is the structural representation of the superpotential determining device of liquid crystal display of the present invention;
Fig. 5 is the structural representation of the drive system of liquid crystal display of the present invention.
Embodiment
Below in conjunction with Figure of description, the present invention will be further described.
Liquid crystal is a kind of intermediate material between crystal state and liquid condition.It has some feature of liquid and crystal concurrently, shows the character of some uniquenesses.Most of liquid crystal all belongs to organic double compound, by long bar-shaped molecular composition.In its natural state, the major axis of these rodlike molecules is almost parallel.Liquid crystal is poured into a fluting plane through superior processing, liquid crystal molecule can arrange along groove, if so those grooves are very parallel, then each molecule is also completely parallel.Liquid crystal molecule itself is with electric charge, and during no power, liquid crystal itself row can be stood or reverse in irregular, thus intercepts or light beam is passed through smoothly.Conducting when energized, arrangement becomes orderly, and light is easily passed through; Fall into disarray during no power, stops light to pass through.
The liquid crystal molecule of liquid crystal display is lined by line scan, and remain to this row image of next field after every line scanning completes to send over and just can change always, within the sweep time of one, first the liquid crystal molecule of bottom reaches the image that steady state (SS) shows this.Subsequent time, middle liquid crystal molecule also reaches steady state (SS), and now, the liquid crystal molecule of bottom still remains on this steady state (SS).After the sweep time of one, and when bottom receives again a new field signal, the liquid crystal molecule at top reaches steady state (SS), and now, the liquid crystal molecule of bottom has received the signal of next and reached steady state (SS).So-called adjustment 3D display effect, it is at all namely according to the scanning of liquid crystal molecule, get certain some time point, open or close backlight, and then coordinate the switch of 3D eyeglass to make beholder see separated corresponding right and left eyes image, and liquid crystal molecule scanning here refers to liquid crystal deflecting element to steady state (SS), show correct image.During debugging 3D effect, the backlight opening time point of its correspondence also will after liquid crystal molecule completes deflection, if liquid crystal molecule can reach steady state (SS) faster, then liquid crystal module group backlight controllable time will be longer, crosstalk also can diminish, and the time that backlight is opened also can lengthen, and brightness increases.
Each steady state (SS) of liquid crystal molecule all correspond to certain voltage, and when on electrode during making alive, liquid crystal molecule is not immediately turn to dbjective state, but just can reach this state after certain response time, and voltage is higher, and the speed of molecule rotation is faster.Because the corresponding voltage of different GTG is different, molecule needs the angle that turns over also different, and this varied with regard to the response time causing different GTG and change.Steady state (SS) is reached faster in order to enable liquid crystal molecule, and the response time equalization that different GTG is switched, the driving voltage that namely applies of application overdrive technique is a little higher than or lower than the corresponding voltage of dbjective state in initial, the speed that liquid crystal molecule is rotated is faster, when arriving dbjective state, voltage is getting back to the corresponding voltage of dbjective state with hold mode.
As shown in Figure 1, liquid crystal molecule response curve, middle curve a is voltage curve, curve b is under normal circumstances, liquid crystal molecule on the liquid crystal panel of liquid crystal display is under the effect of electric current, and its liquid crystal molecule carries out deflecting until reach steady state (SS) slowly, and the time reaching steady state (SS) is long; As shown in Figure 2, curve a represents voltage curve, and after increasing overdrive voltage, its liquid crystal molecule response time is fast, and what liquid crystal molecule change curve b can be very fast reaches steady state (SS).After use is overdrived, its backlight controllable time can obviously strengthen.Overdrive technique is applied to the liquid crystal molecule better can taking into account backlighted region in 3D display technique, to ensure that liquid crystal is all in steady state (SS), namely reduce the crosstalk under 3D, under the opening time that simultaneously can increase backlight makes 3D, brightness increases, and then optimizes 3D effect.The optimization of 3D effect is decided by the superpotential accuracy in overdrive table, does not also have the method for the comparatively accurate overdrive table of a kind of effective foundation at present.The method for building up of 3D overdrive table of the present invention, utilizes the brightness of energising deflection characteristic printing opacity of testing liquid crystal display within the regular hour of liquid crystal molecule to carry out the correctness of authenticated motivation value as master gauge.
As shown in Figure 3, the defining method of 3D voltage of the present invention, comprises the steps:
1.1 measure liquid crystal display display 0,255 and 0-255 between multiple different GTG, brightness as Benchmark brightness;
Required superpotential is changed between the different gray scale images of 1.2 default adjacent two frames;
1.3 utilize the superpotential driving display preset, and the brightness that testing liquid crystal display reaches after corresponding superpotential drives the time of setting is as test brightness;
1.4 contrast Benchmark brightness and test brightness, do not meet according to comparing result adjustment superpotential, return step 3.3; Meet termination.
Further, the concrete method of testing step of the test brightness of described step 1.3 is:
2.1 input a frame left-eye image and a frame eye image of different GTG to LCDs, carry out Alternation Display;
2.2 a frame left-eye image or eye image duration, utilizes the default superpotential driving liquid crystal displays that respective image GTG is corresponding, until receive next frame left eye or eye image;
2.3 measure the brightness value of liquid crystal display display after the voltage driven one two field picture time, and this brightness value is test brightness.
Further, the adjustment method of described step 1.4 is, when test brightness is higher than Benchmark brightness, reduces the default superpotential value in step 1.2; When test brightness presets superpotential value lower than improving during Benchmark brightness; Wherein when adjacent two frame figures by high gray to low gray scale variation time, superpotential value should be not more than driving voltage value corresponding to low GTG, and when being changed to high gray by low GTG, overdrive voltage value should be not less than driving voltage value corresponding to high gray.
Further, the adjustment method of described step 1.4 is,
If when test brightness is higher than Benchmark brightness, reduce the default superpotential value in step 1.2;
If test brightness presets superpotential value lower than improving during Benchmark brightness;
Wherein, when adjacent two two field pictures be by high gray to low gray scale variation time, superpotential value should be not more than driving voltage value corresponding to low GTG;
When adjacent two two field pictures be changed to high gray by low GTG time, the value of overdrive voltage value should be not less than driving voltage value corresponding to high gray.
Particularly, described test brightness, during image by the different GTG of Alternation Display two frame on a liquid crystal display, timed delivery, for the right and left eyes eyeglass opening shutter glasses, connects nitometer by the brightness probe on it and records.
The defining method of above-mentioned 3D overdrive voltage is that be mainly used in the superpotential question blank that stores in shutter 3D liquid crystal display superpotential is determined, its method carries out final completing by 3D liquid crystal display system.
As shown in Figure 4, described liquid crystal display systems, comprises liquid crystal display 1, image control unit 2, GTG acquiring unit 3, acquiring unit 4 of overdriving, Voltag driving circuit 5, shutter glasses 6, backlight 7 and backlight source driving circuit 8, wherein,
Described liquid crystal display 1, shows adjacent left-eye image and eye image for Alternation Display;
Described image control unit 2, for the synchronizing signal that output image figure signal and control shutter glasses right and left eyes eyeglass are opened;
Described GTG acquiring unit 3, for obtaining the grey decision-making of two adjacent two field pictures, and judge whether two adjacent two field pictures gray scale variation occur, to overdrive described in comparative result is exported to acquiring unit, if the image generation gray scale variation that two frames are adjacent, determine the changing value of adjacent two two field picture grey decision-making, and this value is outputted to acquiring unit of overdriving, the input of 3D superpotential method deterministic process be exactly the image of the different GTG of frame, imitate the image change of liquid crystal display in actual driving process:
Described acquiring unit 4 of overdriving, if there is gray scale variation, for inquiring about the superpotential question blank of storage, and outputs to Voltag driving circuit by this result, controls driving circuit and exports corresponding superpotential;
Described Voltag driving circuit 5, the voltage control signal for being exported by acquiring unit of overdriving described in reception is exported corresponding superpotential and drives described liquid crystal display;
Described shutter glasses 6, connect nitometer 9, comprise a left eyeglass lens and a right eye eyeglass, for receiving the synchronizing signal that described image control unit exports, fluid,matching crystal display display left-eye image and eye image alternately open right and left eyes eyeglass, shown the brightness of left-eye image and eye image by nitometer, the superpotential preset is verified.
Described backlight 7, is adjacent to described liquid crystal display, for providing required brightness for described liquid crystal display;
Described backlight source driving circuit 8, synchronously opens in liquid crystal display for controlling described backlight after liquid crystal display completes superpotential driving
The driving method of liquid crystal display of the present invention, is characterized in that: comprise the steps:
5.1 store superpotential question blank;
5.2 receive image conversion signal;
The 5.3 gray scale variation values determining adjacent current frame image and target frame image;
5.4 by inquiry superpotential question blank, calculates the superpotential needed for image gray-scale level change corresponding to described gray scale variation value;
5.5 utilize described superpotential driving liquid crystal displays, until liquid crystal display receives next frame picture signal, the change of a two field picture occur.
Especially, also comprise before described step 5.1 and determine superpotential step in described superpotential question blank, described superpotential is determined by the superpotential defining method of above-mentioned 3D.
Further, also should step be comprised before described step 5.3: whether more adjacent two two field pictures the step of gray scale variation occurs,
If gray scale variation occurs carry out step 5.4, and by time of described superpotential driving liquid crystal displays one two field picture; Return step 5.2;
If not there is gray scale variation, utilize the voltage driven liquid crystal display that present frame GTG is corresponding, until described liquid crystal display receives the picture signal of the different GTG of a frame.
Especially, the backlight of described liquid crystal display completes after superpotential drives in liquid crystal display and synchronously opens.
Correspondingly, as shown in Figure 5, liquid crystal display systems of the present invention, comprises liquid crystal display 1, image control unit 2, GTG acquiring unit 3, acquiring unit 4 of overdriving, Voltag driving circuit 5, shutter glasses 6, backlight 7 and backlight source driving circuit 8, wherein
Described liquid crystal display 1, for showing adjacent left-eye image and eye image;
Described image control unit 2, for the synchronizing signal that output image figure signal and control shutter glasses right and left eyes eyeglass are opened;
Described GTG acquiring unit 3, for obtaining the grey decision-making of two adjacent two field pictures, and judge whether two adjacent two field pictures gray scale variation occur, to overdrive described in comparative result is exported to acquiring unit, if the image generation gray scale variation that two frames are adjacent, determine the changing value of adjacent two two field picture grey decision-making, and this value is outputted to acquiring unit of overdriving;
Described acquiring unit 4 of overdriving, if generation gray scale variation, for inquiring about the superpotential question blank of storage, obtain the overvoltage value changed for image by driving algorithm, and this result is outputted to Voltag driving circuit, control driving circuit and export corresponding superpotential; If not there is gray scale variation, this result is outputted to Voltag driving circuit, control driving circuit and export the corresponding voltage of two adjacent two field pictures; Wherein, the overvoltage value in described superpotential question blank is obtained by the superpotential defining method of above-mentioned 3D and device.
Described Voltag driving circuit 5, exports liquid crystal display described in corresponding voltage driven for the voltage control signal exported by acquiring unit of overdriving described in reception;
Described shutter glasses 6, comprises a left eyeglass lens and a right eye eyeglass, and for receiving the synchronizing signal that described image control unit exports, fluid,matching crystal display display left-eye image and eye image alternately open right and left eyes eyeglass.
Described backlight 7, is adjacent to described liquid crystal display, for providing required brightness for described liquid crystal display;
Described backlight source driving circuit 8, synchronously opens in liquid crystal display for controlling described backlight after liquid crystal display completes superpotential driving
A kind of televisor, comprises liquid crystal display systems, the liquid crystal display systems that described liquid crystal display systems is above-mentioned.
Superpotential defining method is illustrated below in specific embodiment:
First embodiment:
As shown in table 1, it is a superpotential question blank preset, it is the matrix of a 6*6, the value be wherein distributed on principal diagonal is under 3D state, the brightness value of image when 0,64,128,192,224,255,6 different grey decision-making, this value is obtained by nitometer measurement, as Benchmark brightness, other values are the overdrive voltages needed for present frame gray scale variation to next frame GTG.Because each stable state of liquid crystal molecule all correspond to certain voltage, the driving voltage that different GTG is corresponding different, the overdrive voltage value in described superpotential question blank is represented by the GTG that described overdrive voltage is corresponding.Existing six letters by corresponding for the row of 6 rank matrixes a line arrangement are A, B, C, D, E, F for convenience of description, be called corresponding row, six numerals of the corresponding a line arrangement of 6 rank matrix column are 1,2,3,4,5,6, be called respective column, what corresponding row and respective column distributed successively is 0,64,128,192,224,255,6 different grey decision-making, wherein corresponding row represents that the GTG respective column of present frame represents next frame GTG.
Such as, the overdrive voltage value needed for 0 gray scale variation to 64 GTGs is the driving voltage value corresponding to 71 GTGs in the B1 lattice in superpotential question blank, the row namely at 0 GTG place and the value of row at 64 GTG places.
Overdrive voltage value needed for 64 gray scale variation to 0 GTG is the driving voltage value corresponding to 0 GTG in the A2 lattice in superpotential question blank, the row namely at 64 GTG places and the value of row at 0 GTG place.
Overdrive voltage value needed for 192 gray scale variation to 254 GTGs is the driving voltage value corresponding to 134 GTGs in the E4 lattice in superpotential question blank, the row namely at 192 GTG places and the value of row at 254 GTG places.
Table 1
Under 3D state, be divided into two by image and carry out full screen display respectively, default table-drive verifies that the method for the correctness of wherein over-drive value is described as follows after setting up:
By picture being divided into two pixel regions in left and right, also can be upper and lower two regions, or two regions of interval row, each pixel region shows respectively, and the left and right eyeglass of the corresponding 3D glasses of each pixel region difference, two pixel regions in left and right are now divided into by picture to be that example is described: the left eyeglass of the corresponding 3D glasses of pixel region on the left side, the right eyeglass of the corresponding 3D glasses of pixel region on the right, by increase overdrive after the gray scale variation of image be time of a two field picture to time of steady state (SS).The time redirect that left and right glasses are opened should be image and reaches stable redirect at once, because when not increasing overdrive voltage, or increase overdrive voltage inadequate time, image to reach 64 GTGs should increase by 64 GTGs under voltage, just speed is slow, if the time that the time long lens that the situation that the overdrive voltage so increased is little is issued to 64 GTGs is opened is long, still 64 GTGs can be reached.Being mainly added over-drive value and can it being made to reach target gray scale within the time of specifying of checking.
Verify 0 GTG and the magnitude of voltage corresponding to 64 GTGs whether correct;
First frame, driving leftmost pixel region to make it reach target gray scale by the overvoltage value of 0 GTG corresponding in table 1 is 0 GTG, and open the left eyeglass of lens, it is made to respond to the brightness of now picture, nitometer shows, and compare with the Benchmark brightness measured under 0 GTG obtained in table 1, if the brightness value of display is equal with measuring the Benchmark brightness value obtained in step 1.1, then this overdrive voltage value preset is constant, if brightness is greater than Benchmark brightness, then need to reduce predeterminated voltage, if be less than Benchmark brightness, increase predeterminated voltage, until the brightness under 0 GTG obtained is identical with the brightness value in step 1.1, then overdrive voltage value is the overdrive voltage value under 0 GTG.
Second frame, whether the overdrive voltage value that checking next frame reaches 64 GTGs is correct, with reaching overdrive voltage value needed for 64 GTGs by 0 GTG in table 1, to drive right pixels region to make it reach target gray scale be 64 GTGs, and open the right eyeglass of lens, it is made to respond to the brightness of now picture, nitometer shows, and compare with the Benchmark brightness measured under 64 GTGs obtained in table 1, if the brightness value of display is equal with measuring the Benchmark brightness value obtained in step 1.1, then this overdrive voltage value preset is constant, if brightness is greater than Benchmark brightness, then need to reduce predeterminated voltage, if be less than Benchmark brightness, increase predeterminated voltage, until the brightness under 64 GTGs obtained is identical with the brightness value in step 1.1, then overdrive voltage value is the overdrive voltage value under 64 GTGs.
By above-mentioned left and right pixel region Alternation Display, the simultaneously mode alternately opened of the left and right glasses of 3D glasses, checking Yan Zheng next frame be not 128,192,224,255, overdrive voltage whether correct.
Second embodiment:
As shown in table 2, it is a superpotential question blank preset, it is the matrix on 9*9 rank, the value be wherein distributed on principal diagonal is under 3D state, the brightness value of image when 0,32,64,96,128,160,192,224,255,9 different grey decision-making, this value is obtained by nitometer measurement, as Benchmark brightness, other values are the overdrive voltages needed for present frame gray scale variation to next frame GTG.Because each stable state of liquid crystal molecule all correspond to certain voltage, the driving voltage that different GTG is corresponding different, the overdrive voltage value in described superpotential question blank is represented by the GTG that described overdrive voltage is corresponding.Existing six letters by corresponding for the row of 6 rank matrixes a line arrangement are A, B, C, D, E, F for convenience of description, be called corresponding row, six numerals of the corresponding a line arrangement of 6 rank matrix columns 1,2,3,4,5,6,7,8,9 are called respective column, what corresponding row and respective column distributed successively is 0,32,64,96,128,160,192,224,255,9 different grey decision-making, wherein corresponding row represents that the GTG respective column of present frame represents next frame GTG.
Such as, the overdrive voltage value needed for 0 gray scale variation to 64 GTGs is the driving voltage value corresponding to 71 GTGs in the B1 lattice in superpotential question blank, the row namely at 0 GTG place and the value of row at 64 GTG places.
Table 2
Under 3D state, be divided into two by image and carry out full screen display respectively, default table-drive verifies that the method for the correctness of wherein over-drive value is described as follows after setting up:
By picture being divided into two pixel regions in left and right, the left eyeglass of the corresponding 3D glasses of pixel region on the left side, the right eyeglass of the corresponding 3D glasses of pixel region on the right, by increase overdrive after the gray scale variation of image be time of a two field picture to time of steady state (SS).The time redirect that left and right glasses are opened should be image and reaches stable redirect at once, because when not increasing overdrive voltage, or increase overdrive voltage inadequate time, image to reach 64 GTGs should increase by 64 GTGs under voltage, just speed is slow, if the time that the time long lens that the situation that the overdrive voltage so increased is little is issued to 64 GTGs is opened is long, still 64 GTGs can be reached.Being mainly added over-drive value and can it being made to reach target gray scale within the time of specifying of checking.
Verify 0 GTG and the magnitude of voltage corresponding to 64 GTGs whether correct;
First frame, driving leftmost pixel region to make it reach target gray scale by the overvoltage value of 0 GTG corresponding in table 2 is 0 GTG, and open the left eyeglass of lens, it is made to respond to the brightness of now picture, nitometer shows, and compare with the Benchmark brightness measured under 0 GTG obtained in table 2, if the brightness value of display is equal with measuring the Benchmark brightness value obtained in step 1.1, then this overdrive voltage value preset is constant, if brightness is greater than Benchmark brightness, then need to reduce predeterminated voltage, if be less than Benchmark brightness, increase predeterminated voltage, until the brightness under 0 GTG obtained is identical with the brightness value in step 1.1, then overdrive voltage value is the overdrive voltage value under 0 GTG.
Second frame, whether the overdrive voltage value that checking next frame reaches 64 GTGs is correct, with reaching overdrive voltage value needed for 64 GTGs by 0 GTG in table 2, to drive right pixels region to make it reach target gray scale be 64 GTGs, and open the right eyeglass of lens, it is made to respond to the brightness of now picture, nitometer shows, and compare with the Benchmark brightness measured under 64 GTGs obtained in table 2, if the brightness value of display is equal with measuring the Benchmark brightness value obtained in step 1.1, then this overdrive voltage value preset is constant, if brightness is greater than Benchmark brightness, then need to reduce predeterminated voltage, if be less than Benchmark brightness, increase predeterminated voltage, until the brightness under 64 GTGs obtained is identical with the brightness value in step 1.1, then overdrive voltage value is the overdrive voltage value under 64 GTGs.
By above-mentioned left and right pixel region Alternation Display, the simultaneously mode alternately opened of the left and right glasses of 3D glasses, checking Yan Zheng next frame be not 128,192,224,255, overdrive voltage whether correct.
3rd embodiment:
On the basis of the method for above-mentioned two superpotential question blanks foundation, the Benchmark brightness further expanded to increase the GTG in table-drive is verified, improve superpotential question blank levels of precision, as shown in table 3, it is a superpotential question blank preset, it is the matrix on 17*17 rank, the value be wherein distributed on principal diagonal is under 3D state, image is 0,32,64,96,128,160,192,224,255, brightness value during 17 different grey decision-making, this value is obtained, as Benchmark brightness by nitometer measurement.
Table 3
Equally by picture being divided into two pixel regions in left and right, also can be upper and lower two regions, or two regions of interval row, each pixel region shows respectively, and the left and right eyeglass of the corresponding 3D glasses of each pixel region difference, two pixel regions in left and right are now divided into by picture to be that example is described: the left eyeglass of the corresponding 3D glasses of pixel region on the left side, the right eyeglass of the corresponding 3D glasses of pixel region on the right, by increase overdrive after the gray scale variation of image be time of a two field picture to time of steady state (SS).The time redirect that left and right glasses are opened should be image and reaches stable redirect at once, because when not increasing overdrive voltage, or increase overdrive voltage inadequate time, image to reach 64 GTGs should increase by 64 GTGs under voltage, just speed is slow, if the time that the time long lens that the situation that the overdrive voltage so increased is little is issued to 64 GTGs is opened is long, still 64 GTGs can be reached.Being mainly added over-drive value and can it being made to reach target gray scale within the time of specifying of checking.
Verify 0 GTG and the magnitude of voltage corresponding to 64 GTGs whether correct;
First frame, driving leftmost pixel region to make it reach target gray scale by the overvoltage value of 0 GTG corresponding in table 3 is 0 GTG, and open the left eyeglass of lens, it is made to respond to the brightness of now picture, nitometer shows, and compare with the Benchmark brightness measured under 0 GTG obtained in table 3, if the brightness value of display is equal with measuring the Benchmark brightness value obtained in step 1.1, then this overdrive voltage value preset is constant, if brightness is greater than Benchmark brightness, then need to reduce predeterminated voltage, if be less than Benchmark brightness, increase predeterminated voltage, until the brightness under 0 GTG obtained is identical with the brightness value in step 1.1, then overdrive voltage value is the overdrive voltage value under 0 GTG.
Second frame, whether the overdrive voltage value that checking next frame reaches 64 GTGs is correct, with reaching overdrive voltage value needed for 64 GTGs by 0 GTG in 3, to drive right pixels region to make it reach target gray scale be 64 GTGs, and open the right eyeglass of lens, it is made to respond to the brightness of now picture, nitometer shows, and compare with the Benchmark brightness measured under 64 GTGs obtained in table 3, if the brightness value of display is equal with measuring the Benchmark brightness value obtained in step 1.1, then this overdrive voltage value preset is constant, if brightness is greater than Benchmark brightness, then need to reduce predeterminated voltage, if be less than Benchmark brightness, increase predeterminated voltage, until the brightness under 64 GTGs obtained is identical with the brightness value in step 1.1, then overdrive voltage value is the overdrive voltage value under 64 GTGs.
By above-mentioned left and right pixel region Alternation Display, the simultaneously mode alternately opened of the left and right glasses of 3D glasses, checking not Yan Zheng next frame be in other table grey decision-making overdrive voltage whether correct.
Above; be only preferred embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, the protection domain that protection scope of the present invention should define with claim is as the criterion.
Claims (7)
1. the superpotential defining method of 3D, is characterized in that: comprise the steps:
1.1 measure the brightness of multiple different GTG between liquid crystal display display 0,255 and 0-255 as Benchmark brightness;
Change required superpotential between the different gray scale images of 1.2 default adjacent two frames, the different gray scale images of described adjacent two frames are an adjacent frame left-eye image and a frame eye image;
1.3 utilize the superpotential driving display preset, and the brightness that testing liquid crystal display reaches after corresponding superpotential drives the time of setting is as test brightness;
1.4 contrast Benchmark brightness and test brightness, do not meet according to comparing result adjustment superpotential, return step 1.3; Meet termination;
The concrete method of testing step of the test brightness of described step 1.3 is:
2.1 input a frame left-eye image and a frame eye image of different GTG to LCDs, carry out Alternation Display;
2.2 a frame left-eye image or eye image duration, utilizes the default superpotential driving liquid crystal displays that respective image GTG is corresponding, until receive next frame left eye or eye image;
2.3 measure the brightness value of liquid crystal display display after the voltage driven one two field picture time, and this brightness value is test brightness;
The adjustment method of described step 1.4 is,
If when test brightness is higher than Benchmark brightness, reduce the default superpotential value in step 1.2;
If test brightness presets superpotential value lower than improving during Benchmark brightness;
Wherein, when adjacent two two field pictures be by high gray to low gray scale variation time, superpotential value should be not more than driving voltage value corresponding to low GTG;
When adjacent two two field pictures be changed to high gray by low GTG time, the value of overdrive voltage value should be not less than driving voltage value corresponding to high gray.
2. the superpotential defining method of 3D according to claim 1, it is characterized in that: described test brightness, during image by the different GTG of Alternation Display two frame on a liquid crystal display, timed delivery, for the right and left eyes eyeglass opening shutter glasses, connects nitometer by the brightness probe on it and records.
3. a driving method for liquid crystal display, is characterized in that: comprise the steps:
5.1 determine superpotential in superpotential question blank, and described superpotential is determined by the arbitrary described superpotential defining method of 3D of claim 1 to 2;
5.2 store superpotential question blank;
5.3 receive image conversion signal;
The 5.4 gray scale variation values determining adjacent current frame image and target frame image;
5.5 by inquiry superpotential question blank, calculates the superpotential needed for image gray-scale level change corresponding to described gray scale variation value;
5.6 utilize described superpotential driving liquid crystal displays, until liquid crystal display receives next frame picture signal, the change of a two field picture occur.
4. the driving method of liquid crystal display according to claim 3, is characterized in that: also should comprise step before described step 5.3: whether more adjacent two two field pictures the step of gray scale variation occurs,
If gray scale variation occurs carry out step 5.4, and by time of described superpotential driving liquid crystal displays one two field picture; Return step 5.2;
If not there is gray scale variation, utilize the voltage driven liquid crystal display that present frame GTG is corresponding, until described liquid crystal display receives the picture signal of the different GTG of a frame.
5. the driving method of liquid crystal display according to claim 3, is characterized in that: the backlight of described liquid crystal display completes after superpotential drives in liquid crystal display synchronously to be opened.
6. a liquid crystal display systems, is characterized in that: comprise liquid crystal display, image control unit, GTG acquiring unit, acquiring unit of overdriving, Voltag driving circuit, backlight and backlight source driving circuit, wherein,
Described liquid crystal display, for showing adjacent left-eye image and eye image;
Described image control unit, for the synchronizing signal that output image figure signal and control shutter glasses right and left eyes eyeglass are opened;
Described GTG acquiring unit, for obtaining an adjacent frame left-eye image and the grey decision-making of a frame eye image, and judge whether two adjacent two field pictures gray scale variation occur, to overdrive described in comparative result is exported to acquiring unit, if the image generation gray scale variation that two frames are adjacent, determine the changing value of adjacent two two field picture grey decision-making, and this value is outputted to acquiring unit of overdriving;
Described acquiring unit of overdriving, if there is gray scale variation, for inquiring about the superpotential question blank of storage, obtaining the overvoltage value changed for image, and this result is outputted to Voltag driving circuit, control driving circuit and export corresponding superpotential by driving algorithm; If not there is gray scale variation, this result is outputted to Voltag driving circuit, control driving circuit and export the corresponding voltage of two adjacent two field pictures; Wherein, the overvoltage value in described superpotential question blank is obtained by the arbitrary described superpotential defining method of 3D of Claims 1-4;
Described Voltag driving circuit, exports liquid crystal display described in corresponding voltage driven for the voltage control signal exported by acquiring unit of overdriving described in reception;
Described shutter glasses, comprises a left eyeglass lens and a right eye eyeglass, and for receiving the synchronizing signal that described image control unit exports, fluid,matching crystal display display left-eye image and eye image alternately open right and left eyes eyeglass;
Described backlight, is adjacent to described liquid crystal display, for providing required brightness for described liquid crystal display;
Described backlight source driving circuit, synchronously opens in liquid crystal display for controlling described backlight after liquid crystal display completes superpotential driving.
7. a televisor, comprises liquid crystal display systems, it is characterized in that: described liquid crystal display systems is liquid crystal display systems according to claim 6.
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| CN103685864B (en) * | 2013-12-17 | 2017-02-08 | 深圳市华星光电技术有限公司 | Image signal acquiring method and image signal acquiring device |
| CN103813158B (en) * | 2014-02-19 | 2015-12-02 | 深圳市华星光电技术有限公司 | Over-drive value generating apparatus and method |
| CN105208365B (en) * | 2014-06-20 | 2018-05-15 | 青岛海信电器股份有限公司 | One kind shows signal processing method, device and display device |
| CN104280913B (en) * | 2014-10-13 | 2017-07-28 | 京东方科技集团股份有限公司 | The method and system and display device of the display effect of adjustable liquid crystal display display panel |
| CN107402465B (en) * | 2017-08-04 | 2020-04-10 | 中国科学院光电技术研究所 | Method for establishing overdrive lookup table |
| CN109509452B (en) * | 2018-12-21 | 2021-07-06 | 惠科股份有限公司 | Driving method, device, equipment, display and readable storage medium |
| CN109686329B (en) * | 2018-12-29 | 2020-12-08 | 成都中电熊猫显示科技有限公司 | Method, device and storage medium for over-drive debugging |
| CN109448662A (en) * | 2019-01-11 | 2019-03-08 | 京东方科技集团股份有限公司 | Display control method and device |
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