CN102842297A - Method for controlling gray scales, gray scale control device and liquid crystal display - Google Patents
Method for controlling gray scales, gray scale control device and liquid crystal display Download PDFInfo
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Abstract
The embodiment of the invention provides a method for controlling gray scales, a gray scale control device and a liquid crystal display (LCD). The LCD comprises a plurality of pixels. The method comprises the following steps: acquiring luminance (L0) of the pixels at the end time of a current frame; according to the luminance (L0) at the end time of the current frame, acquiring drive gray scales of the pixels at a target frame, wherein the target frame is the next frame of the current frame; and outputting the drive gray scales out of the target frame, wherein the drive gray scales enable actual luminance of the pixels at the target frame to be equal to target luminance (L1) of the target frame and the target luminance (L1) can reach an expected value of human eyes, and the actual luminance is the luminance generated by integration of gray scale response time curves corresponding to the drive gray scales to times. Within the time of one frame, the gray scales are integrated to obtain the actual luminance of the target frame. Because the feeling of the human eyes for lights during a period is an average effect during the period, namely, the expected value of the human eyes, the actual luminance generated by adjusted drive gray scales can reach the expected value of the human eyes, thus being capable of eliminating smearing happening in the process of switching pictures.
Description
Technical field
The present invention relates to display technique, be meant a kind of method, GTG control device and LCD of controlling GTG especially.
Background technology
In the process that LCD (LCD, Liquid Crystal Display) shows, GTG has been represented the stratum level by the darkest different brightness to the brightest, and middle level is many more, and the picture effect that can appear is exquisiteness more just.Liquid crystal response can cause the object of fast moving smear to occur slowly, and this is because liquid crystal responds in the GTG transfer process not exclusively, causes actual GTG different with target gray scale.The response time section of LCD is longer usually, therefore at show image---and especially in the process of dynamic image, carry out the long meeting of response time section that picture switches and cause the GTG upset not exclusively; If the GTG of two continuous pictures differs bigger in the transfer process; The partial information that can comprise original picture in the new picture; Because people's eyes are in a period of time, be the average effect of this section in the time to the impression of light, therefore can form ghost (smear) defective.
In order to eliminate smear, normally improve the refreshing frequency of LCD, but this can significantly increase cost and technology difficulty; And the refresh rate of LCD risen to 120Hz/240Hz, though this has improved smear problem, but do not reach the display effect of traditional C RT technology.
There is following problem in prior art: the refreshing frequency through improving LCD realizes image color accurately, can't eliminate smear fully, also can cause the inaccurate of color, for example, can occur the inaccurate of smear or dynamic color during display frame.
Summary of the invention
The technical matters that the present invention will solve provides a kind of method, GTG control device and LCD of controlling GTG, is used to solve the color of smear and accurate video display.
For solving the problems of the technologies described above, embodiments of the invention provide a kind of method of control GTG of display, and display comprises a plurality of pixels; Method comprises: step 1, obtain said pixel at the present frame brightness L0 of the finish time; Step 2 according to the said present frame brightness L0 of the finish time, is obtained the driving GTG of said pixel in target frame; Wherein, said target frame is a back frame of said present frame; Step 3; The said driving GTG of output in said target frame; Said driving GTG makes said pixel equal to satisfy the object brightness L1 of the said target frame of human eye expectation value in the intrinsic brilliance of said target frame, and wherein said intrinsic brilliance is that the corresponding GTG curve of said driving GTG carries out the brightness that integration produces to the time.
In the described method, the GTG curve that said driving GTG is corresponding carries out integration to the time and produces said pixel and specifically comprise in the intrinsic brilliance of said target frame: the initial moment of the time span of integration is the moment that target frame begins; Be the moment that said target frame finishes the finish time of the time span of integration.
In the described method, said display comprises a plurality of color display units, and each said color display unit comprises three pixels that correspond respectively to red pure color component, green solid component and blue pure color component at least; The driving GTG of said color display unit is the stack of the driving GTG of said at least three pixels.
In the described method, before the step 2, deposit a gray scale response look-up table in advance, the horizontal ordinate of gray scale response look-up table is the said present frame brightness L0 of the finish time, and the ordinate of said gray scale response look-up table is the object brightness L1 of said target frame; Deposit among the said gray scale response look-up table and the brightness L0 of finish time of each said present frame and the corresponding driving GTG of object brightness L1 of said target frame.
In the described method, also comprise: step 4, obtain the target frame brightness L2 of the finish time according to brightness L0 and the said driving GTG of present frame finish time; Behind the said target frame buffer memory of brightness L2 through a frame length of the finish time, the brightness L2 that exports said target frame finish time is as the new present frame brightness L0 of the finish time.
In the described method, deposit the two look-up tables of a gray scale response, the two look-up tables of said gray scale response comprise first look-up table and second look-up table; The horizontal ordinate of first look-up table is the present frame brightness L0 of the finish time, and ordinate is the object brightness L1 of target frame, deposits the driving GTG corresponding with the object brightness L1 of each said brightness L0 and said target frame among first look-up table; The horizontal ordinate of second look-up table is the said present frame brightness L0 of the finish time, and ordinate is said driving GTG, deposits the said target frame brightness L2 of the finish time among the second look-up table.
A kind of GTG control device comprises: frame processing unit is used to obtain pixel at the present frame brightness L0 of the finish time; Search computing unit; Be used for according to said pixel at the said present frame brightness L0 of the finish time; Obtain the driving GTG of said pixel in target frame; Said driving GTG makes said pixel equal to satisfy the object brightness L1 of the said target frame of human eye expectation value in the intrinsic brilliance of said target frame, and wherein said intrinsic brilliance is that the corresponding GTG curve of said driving GTG carries out the brightness that integration produces to the time; Wherein, said target frame is a back frame of said present frame; Output unit is used at the said driving GTG of said target frame output.
In the described device, display comprises a plurality of color display units, and each said color display unit comprises three pixels that correspond respectively to red pure color component, green solid component and blue pure color component at least.
In the described device; Also comprise: single table administrative unit; Be used to deposit a gray scale response look-up table, the horizontal ordinate of said gray scale response look-up table is the said present frame brightness L0 of the finish time, and the ordinate of said gray scale response look-up table is the object brightness L1 of said target frame; Deposit among the said gray scale response look-up table and the brightness L0 of each said present frame finish time and the corresponding driving GTG of object brightness L1 of said target frame.
In the described device, also comprise: two table administrative units, be used to deposit the two look-up tables of a gray scale response, the two look-up tables of said gray scale response comprise first look-up table and second look-up table; The horizontal ordinate of first look-up table is the present frame brightness L0 of the finish time, and ordinate is the object brightness L1 of said target frame, deposits in the table and the brightness L0 of each said present frame finish time and the corresponding driving GTG of object brightness L1 of said target frame; The horizontal ordinate of second look-up table is the said present frame brightness L0 of the finish time, and ordinate is said driving GTG, deposits the said target frame brightness L2 of the finish time in the table.
In the described device, also comprise: buffer, be used for after the said target frame buffer memory of brightness L2 of the finish time through a frame length, export to said first look-up table and said second look-up table as the new present frame brightness L0 of the finish time.
A kind of LCD comprises the GTG control device, and the GTG control device comprises: frame processing unit is used to obtain pixel at the present frame brightness L0 of the finish time; Search computing unit; Be used for according to said pixel at the said present frame brightness L0 of the finish time; Obtain the driving GTG of said pixel in target frame; Said driving GTG makes said pixel equal to satisfy the object brightness L1 of the said target frame of human eye expectation value in the intrinsic brilliance of said target frame, and wherein said intrinsic brilliance is that the corresponding GTG curve of said driving GTG carries out the brightness that integration produces to the time; Wherein, said target frame is a back frame of said present frame; Output unit is used at the said driving GTG of said target frame output.
In the described LCD, comprise a plurality of color display units, each said color display unit comprises three pixels that correspond respectively to red pure color component, green solid component and blue pure color component at least.
In the described LCD; Also comprise: single table administrative unit; Be used to deposit a gray scale response look-up table, the horizontal ordinate of said gray scale response look-up table is the said present frame brightness L0 of the finish time, and the ordinate of said gray scale response look-up table is the object brightness L1 of said target frame; Deposit among the said gray scale response look-up table and the brightness L0 of each said present frame finish time and the corresponding driving GTG of object brightness L1 of said target frame.
In the described LCD, also comprise: two table administrative units, be used to deposit the two look-up tables of a gray scale response, the two look-up tables of said gray scale response comprise first look-up table and second look-up table; The horizontal ordinate of first look-up table is the present frame brightness L0 of the finish time, and ordinate is the object brightness L1 of said target frame, deposits in the table and the brightness L0 of each said present frame finish time and the corresponding driving GTG of object brightness L1 of said target frame; The horizontal ordinate of second look-up table is the said present frame brightness L0 of the finish time, and ordinate is said driving GTG, deposits the said target frame brightness L2 of the finish time in the table.
In the described LCD, also comprise: buffer, be used for after the said target frame buffer memory of brightness L2 of the finish time through a frame length, export to said first look-up table and said second look-up table as the new present frame brightness L0 of the finish time.
The beneficial effect of technique scheme of the present invention is following: in the time of a frame; Carry out integration to driving GTG; Obtain the intrinsic brilliance of target frame, because human eye is the average effect in during this period of time in the impression of a period of time interior focusing, and the intrinsic brilliance of adjusted driving GTG generation can satisfy the human eye expectation value; Therefore can eliminate the smear that exists in the picture handoff procedure, and make the color of dynamic image show fine and smooth more naturally.
Description of drawings
Fig. 1 representes a kind of method flow synoptic diagram of in procedure for displaying, controlling GTG;
Fig. 2 representes to control the principle of work synoptic diagram of GTG;
Fig. 3 representes the principle of work synoptic diagram one of control GTG in the process of color display;
Fig. 4 representes the principle of work synoptic diagram two of control GTG in the process of color display;
Fig. 5 representes the principle of work synoptic diagram of gray scale response look-up table;
Fig. 6 representes the principle of work synoptic diagram of the two look-up tables of gray scale response;
Fig. 7 representes the structural representation of GTG control device.
Embodiment
For technical matters, technical scheme and advantage that the present invention will be solved is clearer, will combine accompanying drawing and specific embodiment to be described in detail below.
The present invention utilizes the process of liquid crystal response to carry out the GTG conversion, to alleviate ghost, the color of accurate video display according to the formation principle mechanisms of LCD ghost.
The embodiment of the invention provides a kind of method of in procedure for displaying, controlling GTG, is applied to LCD, and said LCD comprises a plurality of pixels; As shown in Figure 1, method comprises:
Step 101 (step 1) is obtained said pixel at the present frame brightness L0 of the finish time;
Step 102 (step 2) according to the said present frame brightness L0 of the finish time, is obtained the driving GTG of said pixel in target frame; Wherein, said target frame is a back frame of said present frame;
Step 103 (step 3); The said driving GTG of output in said target frame; Said driving GTG makes said pixel equal to satisfy the object brightness L1 of the said target frame of human eye expectation value in the intrinsic brilliance of said target frame, and wherein said intrinsic brilliance is that the corresponding GTG curve of said driving GTG carries out the brightness that integration produces to the time.
Use the technical scheme that is provided; In the time of a frame, carry out integration to driving GTG, obtain the intrinsic brilliance of target frame; Because human eye is the average effect in during this period of time in the impression of a period of time interior focusing; And the intrinsic brilliance that adjusted driving GTG produces can satisfy (equaling) human eye expectation value, therefore can eliminate the smear that exists in the picture handoff procedure, and makes the color of dynamic image show fine and smooth more naturally.
In a preferred embodiment, GTG curve that said driving GTG is corresponding carries out integration to the time and produces said pixel and specifically comprise in the intrinsic brilliance of said target frame:
The initial moment of the time span of integration is the moment that target frame begins;
Be the moment that said target frame finishes the finish time of the time span of integration.
The occupied time span of frame is called frame length; The human eye expectation value that object brightness L1 satisfies in the frame length specifically is meant: people's eyes receive enough light in the regular hour section can form the understanding for an image; Because the light that image sends changes; Therefore the method for calculating the light that receives is normally carried out integration to the driving GTG in this time period; Obtain driving the brightness that GTG produces, the unit of brightness is nit (nit).
In an application scenarios; Being transformed into 150 (60nit) with GTG from 50 (5nit) is example; As shown in Figure 2; The GTG of GTG 50 to 150 (Grey To Grey) generally can be less than the frame length of a frame, and the brightness change procedure presents a curve, and brightness from 90% 100% the time of being transformed into can be longer.Because human eye is in a period of time, be the general effect-human eye expectation value of the brightness in during this period of time to the impression of light, in each frame length, shown in the last figure among Fig. 2, prior art is 5nit → 45nit → 55nit → 58nit → 60nit;
Use the technology that the application embodiment provides, shown in the figure below among Fig. 2, in the corresponding frame length of the response process of liquid crystal; In short time-period of the day from 11 p.m. to 1 a.m interbody spacer, will drive GTG through integral action and be elevated to an enough big numerical value, and; Guarantee in each period of the day from 11 p.m. to 1 a.m interbody spacer of a frame length, keep driving the GTG basically identical, promptly; In each period of the day from 11 p.m. to 1 a.m interbody spacer; Brightness has guaranteed that from 5nit → 60nit → 60nit → 60nit → 60nit the brightness that human eye is seen is accurately, has eliminated the smear phenomenon.
In a preferred embodiment, display comprises a plurality of color display units, and each said color display unit comprises three pixels that correspond respectively to red pure color component, green solid component and blue pure color component at least;
The driving GTG of said color display unit is the stack of the driving GTG of said at least three pixels.
For the corresponding pixel of each pure color component; Execution in step 103, that is, and in said response time section; Change procedure to the GTG of red pure color component, green solid component and blue pure color component carries out integration respectively; Obtain corresponding intrinsic brilliance R, intrinsic brilliance G and intrinsic brilliance B, these three intrinsic brilliances are in same color display unit, therefore for human eye; The intrinsic brilliance that this color display unit appeared is the effect after intrinsic brilliance R, intrinsic brilliance G and the intrinsic brilliance B stack, and intrinsic brilliance can satisfy the human eye expectation value in the frame length.
In an application scenarios, as shown in Figure 3, in the process of liquid crystal display displays coloured image; The GTG of three primary colors RGB converts (50 of back one frame into by (50,50,50) of former frame; 100; 150) in the process, because prior art exists difference to the process that each pure color component carries out the GTG conversion, deviation appears in the synthetic color that possibly cause finally appearing; Therefore the technology that adopts the embodiment of the invention to provide; As shown in Figure 4; Driving GTG to each pure color component-red pure color component, green solid component and blue pure color component carries out integration, and the intrinsic brilliance that forms after the output integration is given pixel corresponding respectively in each color display unit of display:
For red pure color component, in the response time section, there is not variation from 50 → 50 owing to drive GTG, therefore need not carry out integration;
For the green solid component, in the response time section,, therefore need in the response time section, carry out integration owing to drive GTG from 50 → 100, the brightness that forms after the integration should be satisfied corresponding human eye expectation value;
For blue pure color component, in the response time section,, therefore need in the response time section, carry out integration owing to drive GTG from 50 → 150, the brightness that forms after the integration should be satisfied corresponding human eye expectation value.
Through above-mentioned integral process, guarantee that the gray scale response of each pure color component is accurate, eliminate smear, realize the accurate demonstration of synthetic color.
In a preferred embodiment; Before the step 2; Deposit a gray scale response look-up table in advance, the horizontal ordinate of said gray scale response look-up table is the said present frame brightness L0 of the finish time, and the ordinate of said gray scale response look-up table is the object brightness L1 of said target frame;
Deposit among the said gray scale response look-up table and the brightness L0 of finish time of each said present frame and the corresponding driving GTG of object brightness L1 of said target frame.
In a preferred embodiment, also comprise:
Step 4 is obtained the target frame brightness L2 of the finish time according to brightness L0 and the said driving GTG of present frame finish time;
Behind the said target frame buffer memory of brightness L2 through a frame length of the finish time, the brightness L2 that exports said target frame finish time is as the new present frame brightness L0 of the finish time.
In an application scenarios; As shown in Figure 5; Generate the look-up table of one 256 row * 256 row according to every kind of different LCD response measurement data; The GTG of horizontal ordinate (columns) sign former frame, the GTG of the back frame that ordinate (line number) sign will show, the data of depositing in the form of horizontal ordinate and ordinate point of crossing correspondence promptly are the driving GTGs of the actual output after will changing; The former frame here is present frame, and back one frame is a target frame.
If the GTG of former frame is 50, the GTG of back one frame is 150, and in the gray scale response look-up table, the data of the 150th row the 50th row are the driving GTG 170 after the conversion;
If the GTG of former frame is 170, the GTG of back one frame is 150, in the gray scale response look-up table, can find the 150th row, and the data of 170 row are the driving GTG 145 after the conversion, in like manner can carry out other similar transfer processes.
When hardware is realized the gray scale response look-up table, can adopt the gray scale response look-up table of different-format; For example; For the less hardware of arithmetic capability; Adopt 16 * 16 gray scale response look-up table; Middle data then adopt interpolation to generate, and the principle that generates interpolation is: on the basis of discrete data, mend and insert continuous function, make to estimate in the approximate value at other some places data as the centre according to continuous function.
In a preferred embodiment, deposit the two look-up tables of a gray scale response, the two look-up tables of gray scale response comprise first look-up table and second look-up table;
The horizontal ordinate of first look-up table is the present frame brightness L0 of the finish time, and ordinate is the object brightness L1 of target frame, deposits the driving GTG corresponding with the object brightness L1 of each said brightness L0 and said target frame among first look-up table;
The horizontal ordinate of second look-up table is the said present frame brightness L0 of the finish time, and ordinate is said driving GTG, deposits the said target frame brightness L2 of the finish time among the second look-up table.
In an application scenarios, the GTG of former frame not only influences the GTG of target frame, but also can have influence on the next frame of target frame; As shown in Figure 6; Therefore want to correct more accurately, need to adopt the two look-up tables of gray scale response to carry out the GTG conversion, the two look-up tables of gray scale response comprise first look-up table and second look-up table; Its principle of work is as shown in Figure 6, comprising:
Among first look-up table; Horizontal ordinate is the former frame brightness L0 of the finish time; Ordinate is the object brightness L1 of target frame; Deposit in the table and the brightness L0 of each former frame finish time and the corresponding driving GTG Gray_out of object brightness L1 of target frame, therefore the output of first look-up table is to drive GTG; The former frame here is said present frame, and back one frame is said target frame;
Printed circuit board (Source PCB, Source Printed Circuit Board) outputs to LCD through the source to drive GTG Gray_out, substitutes original GTG of pixel among the LCD;
In target frame, carry out integration to driving GTG Gray_out, the intrinsic brilliance that forms after the integration should satisfy corresponding human eye expectation value, because the existence of a variety of causes, intrinsic brilliance also might not exclusively satisfy the human eye expectation value.
In the finish time of target frame, driving GTG Gray_out is this target frame GTG at this very moment, because the back of target frame next frame and then; Therefore also be the next frame driving GTG of the zero hour; In other words, the driving GTG of former frame is to target frame, and next frame has all produced influence.
After the output of first look-up table drives GTG Gray_out, drive GTG Gray_out and get into second look-up table, the ordinate of second look-up table has write down this driving GTG Gray_out, the brightness L2 of the finish time of second look-up table export target frame.
The brightness L2 of the finish time of target frame is by timer/counter control register (TCON; Timer Control Register) frame length of buffer memory; The finish time of target frame or the finish time a little earlier before, L2 is outputed in first look-up table and the second look-up table.
In first look-up table, L2 replaces the old present frame brightness L0 of the finish time;
In second look-up table, L2 replaces the old present frame brightness L0 of the finish time.
Adopt hardware to realize in the process of the two look-up tables of gray scale response, the two look-up tables of gray scale response can have different forms; For example, for the less hardware of arithmetic capability, adopt 16 * 16 the two look-up tables of gray scale response, the intermediate data that is not documented on the two look-up tables of gray scale response adopts difference to generate.
Use the two look-up tables of gray scale response look-up table or gray scale response; Adopt the driving GTG after changing to carry out integration formation and the general effect of control brightness in a frame length; The intrinsic brilliance that has guaranteed final formation satisfies the human eye expectation value, makes the colour brightness of dynamic image accurately to stablize.
The embodiment of the invention provides a kind of GTG control device, and LCD comprises a plurality of pixels, and the GTG control device is as shown in Figure 7, comprising:
Wherein, the time is carried out integration produce said pixel and specifically comprise driving the corresponding GTG curve of GTG in the intrinsic brilliance of said target frame:
The initial moment of the time span of integration is the moment that target frame begins; Be the moment that said target frame finishes the finish time of the time span of integration.
In a preferred embodiment, display comprises a plurality of color display units, and each color display unit comprises three pixels that correspond respectively to red pure color component, green solid component and blue pure color component at least.
For this reason, the first integral module is used in said response time section, calls said integral unit the change procedure of the GTG of red pure color component is carried out integration;
The second integral module is used in said response time section, calls said integral unit the change procedure of the GTG of green solid component is carried out integration;
The third integral module is used in said response time section, calls said integral unit the change procedure of the GTG of blue pure color component is carried out integration.
In a preferred embodiment, also comprise:
Single table administrative unit is used to deposit a gray scale response look-up table, and the horizontal ordinate of said gray scale response look-up table is the said present frame brightness L0 of the finish time, and the ordinate of said gray scale response look-up table is the object brightness L1 of said target frame;
Deposit among the said gray scale response look-up table and the brightness L0 of each said present frame finish time and the corresponding driving GTG of object brightness L1 of said target frame.
In a preferred embodiment, also comprise:
Two table administrative units are used to deposit the two look-up tables of a gray scale response, and the two look-up tables of said gray scale response comprise first look-up table and second look-up table;
The horizontal ordinate of first look-up table is the present frame brightness L0 of the finish time, and ordinate is the object brightness L1 of said target frame, deposits in the table and the brightness L0 of each said present frame finish time and the corresponding driving GTG of object brightness L1 of said target frame;
The horizontal ordinate of second look-up table is the said present frame brightness L0 of the finish time, and ordinate is said driving GTG, deposits the said target frame brightness L2 of the finish time in the table.
In a preferred embodiment, also comprise:
Buffer is used for after the target frame buffer memory of brightness L2 through a frame length of the finish time, exports to first look-up table and said second look-up table as the new present frame brightness L0 of the finish time.
The embodiment of the invention provides a kind of LCD, and LCD comprises a plurality of pixels, also comprises the GTG control device, and the GTG control device is as shown in Figure 7, comprising:
Wherein, the time is carried out integration produce said pixel and specifically comprise driving the corresponding GTG curve of GTG in the intrinsic brilliance of said target frame:
The initial moment of the time span of integration is the moment that target frame begins; Be the moment that said target frame finishes the finish time of the time span of integration.
Adopt this programme advantage afterwards to be: in the response time section; The driving GTG is carried out integration obtain intrinsic brilliance; Because human eye is in a period of time; Impression to light is interior during this period of time brightness general effect, and the intrinsic brilliance that the driving GTG produces can satisfy the human eye expectation value, therefore can eliminate the smear that exists in the picture handoff procedure.
The above is a preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from principle according to the invention; Can also make some improvement and retouching, these improvement and retouching also should be regarded as protection scope of the present invention.
Claims (12)
1. the method for the control GTG of a display, said display comprises a plurality of pixels; It is characterized in that said method comprises:
Step 1 is obtained said pixel at the present frame brightness L0 of the finish time;
Step 2 according to the said present frame brightness L0 of the finish time, is obtained the driving GTG of said pixel in target frame; Wherein, said target frame is a back frame of said present frame;
Step 3; The said driving GTG of output in said target frame; Said driving GTG makes said pixel equal to satisfy the object brightness L1 of the said target frame of human eye expectation value in the intrinsic brilliance of said target frame, and wherein said intrinsic brilliance is that the corresponding GTG curve of said driving GTG carries out the brightness that integration produces to the time.
2. method according to claim 1 is characterized in that, the GTG curve that said driving GTG is corresponding carries out integration to the time and produces said pixel and specifically comprise in the intrinsic brilliance of said target frame:
The initial moment of the time span of integration is the moment that target frame begins;
Be the moment that said target frame finishes the finish time of the time span of integration.
3. method according to claim 1 is characterized in that said display comprises a plurality of color display units, and each said color display unit comprises three pixels that correspond respectively to red pure color component, green solid component and blue pure color component at least;
The driving GTG of said color display unit is the stack of the driving GTG of said at least three pixels.
4. method according to claim 1; It is characterized in that; Before the step 2; Deposit a gray scale response look-up table in advance, the horizontal ordinate of said gray scale response look-up table is the said present frame brightness L0 of the finish time, and the ordinate of said gray scale response look-up table is the object brightness L1 of said target frame;
Deposit among the said gray scale response look-up table and the brightness L0 of finish time of each said present frame and the corresponding driving GTG of object brightness L1 of said target frame.
5. method according to claim 1 is characterized in that, also comprises:
Step 4 is obtained the target frame brightness L2 of the finish time according to brightness L0 and the said driving GTG of present frame finish time;
Behind the said target frame buffer memory of brightness L2 through a frame length of the finish time, the brightness L2 that exports said target frame finish time is as the new present frame brightness L0 of the finish time.
6. method according to claim 5 is characterized in that, deposits the two look-up tables of a gray scale response, and the two look-up tables of said gray scale response comprise first look-up table and second look-up table;
The horizontal ordinate of first look-up table is the present frame brightness L0 of the finish time, and ordinate is the object brightness L1 of target frame, deposits the driving GTG corresponding with the object brightness L1 of each said brightness L0 and said target frame among first look-up table;
The horizontal ordinate of second look-up table is the said present frame brightness L0 of the finish time, and ordinate is said driving GTG, deposits the said target frame brightness L2 of the finish time among the second look-up table.
7. a GTG control device is characterized in that, comprising:
Frame processing unit is used to obtain pixel at the present frame brightness L0 of the finish time;
Search computing unit; Be used for according to said pixel at the said present frame brightness L0 of the finish time; Obtain the driving GTG of said pixel in target frame; Said driving GTG makes said pixel equal to satisfy the object brightness L1 of the said target frame of human eye expectation value in the intrinsic brilliance of said target frame, and wherein said intrinsic brilliance is that the corresponding GTG curve of said driving GTG carries out the brightness that integration produces to the time; Wherein, said target frame is a back frame of said present frame;
Output unit is used at the said driving GTG of said target frame output.
8. device according to claim 7 is characterized in that,
Said display comprises a plurality of color display units, and each said color display unit comprises three pixels that correspond respectively to red pure color component, green solid component and blue pure color component at least.
9. device according to claim 7 is characterized in that, also comprises:
Single table administrative unit is used to deposit a gray scale response look-up table, and the horizontal ordinate of said gray scale response look-up table is the said present frame brightness L0 of the finish time, and the ordinate of said gray scale response look-up table is the object brightness L1 of said target frame;
Deposit among the said gray scale response look-up table and the brightness L0 of each said present frame finish time and the corresponding driving GTG of object brightness L1 of said target frame.
10. device according to claim 7 is characterized in that, also comprises:
Two table administrative units are used to deposit the two look-up tables of a gray scale response, and the two look-up tables of said gray scale response comprise first look-up table and second look-up table;
The horizontal ordinate of first look-up table is the present frame brightness L0 of the finish time, and ordinate is the object brightness L1 of said target frame, deposits in the table and the brightness L0 of each said present frame finish time and the corresponding driving GTG of object brightness L1 of said target frame;
The horizontal ordinate of second look-up table is the said present frame brightness L0 of the finish time, and ordinate is said driving GTG, deposits the said target frame brightness L2 of the finish time in the table.
11. device according to claim 10 is characterized in that, also comprises:
Buffer is used for after the said target frame buffer memory of brightness L2 through a frame length of the finish time, exports to said first look-up table and said second look-up table as the new present frame brightness L0 of the finish time.
12. a LCD is characterized in that, comprises like any described GTG control device among the claim 7-11.
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