CN102881264B

CN102881264B - gamma adjustment method and device

Info

Publication number: CN102881264B
Application number: CN201110198496.4A
Authority: CN
Inventors: 沈岭
Original assignee: Shanghai Tianma Microelectronics Co Ltd
Current assignee: Shanghai Tianma Microelectronics Co Ltd
Priority date: 2011-07-15
Filing date: 2011-07-15
Publication date: 2016-01-20
Anticipated expiration: 2031-07-15
Also published as: CN102881264A

Abstract

The invention provides a kind of gamma adjustment method and device, when the GTG of the gamma electric voltage display that the view data of described input is selected is for departing from GTG X, adjust departing from GTG X, the mean value Y of the GTG that A frame is shown meets | Y-N| < | and X-N|, namely reduce the departure degree of GTG, thus improve white balance and the display quality of liquid crystal display.

Description

Gamma adjustment method and device

Technical field

The present invention relates to display technology field, particularly a kind of gamma adjustment method and device.

Background technology

Liquid crystal display comprises the display panels for showing image and the driving device of liquid crystal display for applying drive singal to display panels.Wherein, display panels comprises the array base palte and color membrane substrates that are oppositely arranged, and is filled in the liquid crystal layer in the gap between described array base palte and color membrane substrates.Described array base palte can arrange gate line with constant interval, and arrange the data line perpendicular to described gate line with constant interval, also comprise and arrange thin film transistor (TFT) in a matrix pattern, comprise a described thin film transistor (TFT) at the infall corresponding to described gate line and data line, each described thin film transistor (TFT) corresponds to a pixel.In addition, back light unit can be arranged at the dorsal part of described display panels, to provide uniform light source to display panels.

Described driving device of liquid crystal display generally includes time cycle controller, gate drive apparatus, data driven unit and gamma voltage generating apparatus etc.Wherein, gamma voltage generating apparatus is in order to produce gamma electric voltage, and gamma electric voltage is carried between array base palte and color membrane substrates, in order to control the transmittance of the liquid crystal layer clamped between array base palte and color membrane substrates, namely controls the brightness of display panels.

Because human eye is under darker environment, to the sensitivity of brightness change, can be more high than the environment at light.Usually, brain sensation and the relation of brightness are by following equation expression:

L＝CR ^Γ

Wherein, L represents brightness, and R represents that brain is felt, C represents proportionality constant, and Γ represents exponential constant, usually gets 2.2.

And in image display, the sensation of what image will be passed on is brain, instead of brightness, therefore, need the Γ curve felt according to brightness and brain to correct, make image corresponding with the sensation of brain, namely need to make gamma electric voltage meet Γ curve.Existing gamma voltage generating apparatus is difficult to produce the gamma electric voltage meeting above-mentioned requirements, thus there is gamma electric voltage skew, and display GTG is departed from, and causes occurring the problems such as white balance is bad.

Please refer to Fig. 1, it is the schematic diagram of existing gamma voltage generating apparatus.As shown in Figure 1, gamma voltage generating apparatus 1 comprises electric resistance partial pressure unit 10 and Multipexer selector switch 11.Wherein, described electric resistance partial pressure unit 10 utilizes multiple input voltage V1 ~ V14, exports gamma electric voltage VG0 ~ VG63 to described Multipexer selector switch 11; Described Multipexer selector switch 11, according to the view data of input, is selected a gamma electric voltage and is exported from described gamma electric voltage VG0 ~ VG63.

In order to make the requirement meeting gamma value (being generally 2.2) between the GTG of display panels and gamma electric voltage, each gamma electric voltage VG0 ~ VG63 is required to carry out accurate adjustment the grade of ten millivolts, and this point requires that the precision of input voltage V1 ~ V14 carries out accurate adjustment the grade of several millivolts, and due to the restriction of device property, this point may realize hardly.Thus, existing gamma voltage generating apparatus is difficult to produce the gamma electric voltage met the demands, thus there is gamma electric voltage skew, and display GTG is departed from, and causes occurring the problems such as white balance is bad.This problem is present in other displays too, such as CRT monitor, PDP display.

Summary of the invention

The object of the present invention is to provide a kind of gamma adjustment method and device, display GTG will be caused to depart to solve existing gamma voltage generating apparatus, the problem that white balance is bad.

For solving the problems of the technologies described above, the invention provides a kind of gamma adjustment method, comprising:

Step S1: multiple view data is provided, each view data selects a corresponding gamma electric voltage to export, and each gamma electric voltage of described output shows a corresponding GTG, and multiple described GTG comprises and departs from GTG and standard gray scale;

Step S2: the standard value N that GTG X is corresponding is provided described in providing, and calculates | X-N|;

Step S3: when the GTG of the gamma electric voltage display that the view data of described input is selected is standard gray scale, described standard gray scale continues A frame, and described A is more than or equal to 2;

Step S4: when the GTG of the gamma electric voltage display that the view data of described input is selected is for departing from GTG X, adjust departing from GTG X, the mean value Y of the GTG that A frame is shown is satisfied | Y-N| < | X-N|.

Alternatively, depart from GTG X and be greater than standard value N.

Alternatively, depart from GTG X and be less than standard value N.

Alternatively, adjusting departing from GTG X, selecting | the adjustment mode that Y-N| is minimum.

Alternatively, change the value of the view data of input, the described GTG X that departs from is adjusted.

Alternatively, be 1 ~ 2 to the adjusting range departing from GTG X.

Alternatively, adjust using m neighbor as one group.

Alternatively, the view data that a described m neighbor inputs simultaneously corresponds to and samely departs from GTG, or corresponding multiplely departs from GTG, and described multiple offset direction departing from GTG is identical.

Alternatively, described standard value N is the standard gray scale according to obtaining after gamma correction.

Alternatively, the gamma value that described gamma correction uses is 2.2.

Alternatively, described A is the treatment cycle of adjustment.

Alternatively, comprising multiple tupe to departing from GTG X adjustment, any one tupe can be selected, rear output is adjusted to the view data of input.

Alternatively, respectively the view data of R, G, B is adjusted.

The present invention also provides a kind of gamma adjusting device, it is characterized in that, comprising: electric resistance partial pressure unit, Multipexer selector switch and gamma optimize unit; Wherein,

Described electric resistance partial pressure unit utilizes multiple input voltage, exports the gamma electric voltage corresponding with view data to described Multipexer selector switch;

Described gamma optimizes the view data of unit according to input, and output image data is to described Multipexer selector switch, and the view data of described output is the view data of former input or the view data after adjustment;

Described Multipexer selector switch optimizes the view data of unit output according to described gamma, selects a gamma electric voltage and exports.

Alternatively, if the GTG that the described gamma of input optimizes cell picture data corresponding is standard gray scale, then the view data of former input is exported; If the GTG that the described gamma of input optimizes cell picture data corresponding departs from GTG, then export the view data of former input or the view data after adjustment.

Alternatively, described gamma is optimized unit and comprises: retrieve data table and frame rate control module, and wherein, described retrieve data table comprises the tupe of multiple gamma adjustment; Described frame rate control module is in order to control the frame number of the treatment cycle of gamma adjustment.

Alternatively, described view data comprises the view data corresponding with standard gray scale and the view data corresponding with departing from GTG.

Alternatively, the quantity that described gamma optimizes unit is three, respectively in order to export the view data of R, G, B three primary colours.

In gamma adjustment method provided by the invention and device, when the GTG of the gamma electric voltage display that the view data of described input is selected is for departing from GTG X, adjust departing from GTG X, the mean value Y of the GTG that A frame is shown meets | Y-N| < | and X-N|, namely reduce the departure degree of GTG, thus improve white balance and the display quality of liquid crystal display.

Accompanying drawing explanation

Fig. 1 is the schematic diagram of existing gamma voltage generating apparatus;

Fig. 2 is the schematic diagram of the gamma adjustment method of one embodiment of the invention;

Fig. 3 is the schematic diagram of the gamma adjusting device of one embodiment of the invention;

Fig. 4 is the pattern diagram of the gamma adjustment of another embodiment of the present invention;

Fig. 5 is the schematic diagram one that 4 pixels of yet another embodiment of the invention are adjacent;

Fig. 6 is the schematic diagram two that 4 pixels of yet another embodiment of the invention are adjacent;

Fig. 7 is the schematic diagram three that 4 pixels of yet another embodiment of the invention are adjacent;

Fig. 8 be yet another embodiment of the invention be one group of schematic diagram carrying out a kind of pattern of gamma adjustment with 4 neighbors;

Fig. 9 is schematic diagram R, G, B being carried out respectively to the gamma adjusting device of gamma adjustment of further embodiment of this invention.

Embodiment

Below in conjunction with the drawings and specific embodiments, gamma adjustment method provided by the invention and device are described in further detail.According to following explanation, advantages and features of the invention will be clearer.It should be noted that, accompanying drawing all adopts the form simplified very much, only in order to object that is convenient, the aid illustration embodiment of the present invention lucidly.

Core concept of the present invention is, a kind of gamma adjustment method and device are provided, when the GTG of the gamma electric voltage display that the view data of described input is selected is for departing from GTG X, adjust departing from GTG X, the mean value Y of the GTG that A frame is shown meets | Y-N| < | and X-N|, described N departs from standard value corresponding to GTG X, is namely reduced the departure degree of GTG by adjustment, thus improves white balance and the display quality of liquid crystal display.

Please refer to Fig. 2, it is the schematic diagram of the gamma adjustment method of one embodiment of the invention.As shown in Figure 2, the gamma adjustment method of the present embodiment comprises the steps:

Step S2: the standard value N that GTG X is corresponding is provided described in separately providing, and calculates | X-N|;

Because in time, human eye has an effect of being detained to the image seen, thus, after a few frame, the brightness that human eye is seen, i.e. the GTG of display display, also can produce an average effect.The present invention utilizes above rule to adjust to optimize display effect to departing from GTG X.

Please refer to Fig. 3, it is the schematic diagram of the gamma adjusting device of one embodiment of the invention.As shown in Figure 3, gamma adjusting device 2 comprises: electric resistance partial pressure unit 20, Multipexer selector switch 21 and gamma optimize unit 22; Wherein,

Described electric resistance partial pressure unit 20 utilizes multiple input voltage, exports the multiple gamma electric voltages corresponding with view data to described Multipexer selector switch 21;

Described gamma optimizes the view data of unit 22 according to input, and output image data is to described Multipexer selector switch 21, and the view data of described output is the view data of former input or the view data after adjustment;

Described Multipexer selector switch 21 optimizes the view data of unit 22 input according to described gamma, selects a gamma electric voltage and exports.

Described gamma is optimized unit 22 and comprises frame rate control module 221, and described frame rate control module 221 can control the treatment cycle of described gamma adjustment, and in the present embodiment, the treatment cycle of described gamma adjustment is A frame, and described A is more than or equal to 2.

Below in conjunction with Fig. 2 and Fig. 3 to gamma adjustment method of the present invention and device for a more detailed description.

First, electric resistance partial pressure unit 20 is utilized to produce one group of gamma electric voltage VG0 ~ VG63 by one group of input voltage V1 ~ V14, each view data may correspond to an above-mentioned gamma electric voltage, each gamma electric voltage shows a corresponding GTG, multiple described GTG comprises and departs from GTG X and standard gray scale, namely comprise the GTG meeting gamma curve and the GTG departing from gamma curve, at this, described gamma curve is the gamma curve that gamma value gets 2.2.In addition, depart from the standard value N that GTG X is corresponding described in providing, described standard value N is the standard gray scale according to obtaining after gamma correction, calculates | X-N|, namely asks and departs from GTG X and the described absolute value departing from the difference of standard ash value N corresponding to GTG X.

As the value that can calculate each standard gray scale during gamma correction, also the standard gamma voltage that described standard gray scale is corresponding can be obtained, but as stated in the Background Art, existing hardware device will export all standard gamma magnitudes of voltage, require that the precision of input voltage V1 ~ V14 carries out accurate adjustment the grade of several millivolts, and due to the restriction of device property, this point may realize hardly, only have and select the magnitude of voltage close to described standard gamma voltage to export, part or indivedual GTG can be produced depart from, namely depart from GTG X.Gamma adjustment method provided by the invention and device depart from the display effect of GTG X described in can optimizing.

Concrete, when the GTG of the gamma electric voltage display that the view data inputted is selected is standard gray scale, described standard gray scale continues A frame, and described A is more than or equal to 2.

Such as, in the present embodiment, the gamma electric voltage of view data 011000 correspondence is VG24, and the GTG that described gamma electric voltage VG24 is corresponding is standard gray scale, when the described view data 011000 of input, by described view data 011000, gamma electric voltage VG24 can be selected from one group of gamma electric voltage VG0 ~ VG63, and the GTG that described gamma electric voltage VG24 shows is standard gray scale, then exports A frame image data continuously and be 011000.Concrete, when the view data display standard gray scale inputted, control its display frame number by frame rate control module 221, namely gamma optimization unit 22 exports view data described in A frame.

When the GTG of the gamma electric voltage display that the view data inputted is selected is for departing from GTG X, adjust departing from GTG X, the mean value Y of the GTG that A frame is shown meets | Y-N| < | and X-N|, is namely adjusted by gamma, reduces the departure degree of GTG.In the present embodiment, by asking the absolute value of the difference between standard value N that the mean value Y of A frame GTG is corresponding with departing from GTG X, making this value | Y-N| is less than | X-N|, thus reach the object reducing display GTG and depart from, improve white balance and the display quality of liquid crystal display.

In the present embodiment, by changing the input value of view data, the described GTG X that departs from is adjusted, concrete, optimize unit 22 by gamma and realize.Describedly depart from departing from of GTG X and comprise two kinds of situations: X-N > 0, namely depart from GTG X and be greater than standard value N, depart from GTG X higher; X-N < 0, namely departs from GTG X and is less than standard value N, depart from GTG X on the low side.The mean value Y of the GTG that above two kinds of situations make A frame show by different adjustments meets | Y-N| < | and X-N| is to optimize display effect.

Below with depart from GTG X be greater than standard value N citing illustrate gamma adjustment method disclosed in the present invention:

In the first situation, during X-N > 0, namely depart from GTG X and be greater than standard value N, as the gamma electric voltage VG27 of view data 011011 correspondence, GTG 27 corresponding to described gamma electric voltage VG27 is for departing from GTG, and the standard value N that there is known described GTG 27 is GTG (27-1/5), calculating | the value of X-N| is 1/5 GTG.Namely in fact standard value N is only 27 real GTGs, and GTG 27 corresponding to gamma electric voltage VG27 1/5 GTG that has been more higher than 27 real GTGs, but due to equipment cannot standard gamma voltage corresponding to outputting standard value N, so just replace with gamma electric voltage VG27.

When inputting described view data 011011, by described view data 011011, gamma electric voltage VG27 can be selected from one group of gamma electric voltage VG0 ~ VG63, then in the display of subsequent A frame, described gamma optimizes the view data of the exportable various combination of unit 22, such as, exporting A-1 frame image data is still 011011, only has 1 frame image data to be adjusted value, preferably, A value is 4, and namely 3 frame image datas are still 011011, only has 1 frame image data to be adjusted value.

GTG 27 is for departing from GTG and being greater than standard value N, can input 1 frame regulates view data to make it export a ratio to depart from the little grey decision-making of GTG GTG 27, as GTG 26, then the mean value Y of 4 frame GTGs equals GTG (27-1/4) for (27+27+27+26)/4, namely on the basis of GTG 27, reduces 1/4 GTG.

Because:

Depart from GTG X=27

Standard value N=(27-1/5)

The mean value Y=(27-1/4) of 4 frame GTGs

|X-N|＝|27-(27-1/5)|＝1/5

|Y-N|＝|(27-1/4)-(27-1/5)|＝1/20

So the display effect that can make according to gamma adjustment method disclosed by the invention is adjusted to and only departs from 1/20 GTG from originally departing from 1/5 GTG relative to standard value N for standard value N, greatly optimizes display effect.

Be 1 ~ 2 to departing from the GTG amplitude of accommodation in gamma adjustment method disclosed by the invention, namely to depart from GTG X regulate time, the grey decision-making ratio that the view data of input is corresponding departs from large 1 ~ 2 GTG of GTG X, or than departing from little 1 ~ 2 GTG of GTG X.As preferred embodiment, be 1 to the adjusting range departing from GTG GTG 27 in the present embodiment, the GTG namely inputting view data corresponding is 26, than departing from little 1 GTG of GTG GTG 27.

Can be optimized departing from GTG X by multiple series of images data in gamma adjustment method disclosed by the invention, the mean value Y preferably choosing the GTG of A frame display, closest to standard value N, namely chooses | one group of view data input that Y-N| is minimum.

The second situation, during X-N < 0, also display effect can be optimized according to above-mentioned gamma adjustment method, only need to make to regulate the mean value Y of the GTG that A frame is shown to meet departing from GTG X to height | Y-N| < | X-N|, those skilled in the art can understand according to content disclosed by the invention, just no longer specifically describe herein.

Fig. 4 is the schematic diagram of the adjustment modes of another embodiment of the present invention, as preferred embodiment, the present embodiment additionally provides the pattern of gamma adjustment, please refer to Fig. 2 and Fig. 4, can the gamma adjustment modes write gamma preset be optimized in the retrieve data table 220 of unit 22, by selecting the tupe in retrieve data table 220, to adjust the input value of view data, to reach more fast regulating effect more accurately.

Please refer to Fig. 4, in the present embodiment, in described adjustment modes with 4 frames for one-period, namely A gets 4, in other embodiments of the invention, also can be the frame number that other are more than or equal to the quantity of 2 is that one-period adjusts; In addition, be B to the adjusting range departing from GTG X, in the present embodiment, B gets 1, namely be 1 to the adjusting range departing from GTG X, thus, the intensity of variation of picture will be very little, thus improve display image quality, in other embodiments of the invention, adjusting range also can be larger, and such as 2.

As shown in Figure 4, in the gamma adjustment modes that the present embodiment provides, have 6 kinds of patterns: wherein namely the corresponding X-N > 0 of pattern 1 to mode 3 departs from the higher adjustment of GTG X, and namely pattern 4 to pattern 6 corresponding X-N < 0 departs from GTG X adjustment on the low side.In the diagram, give the concrete a certain frame increasing or reduce, in other embodiments of the invention, different frames can be selected to increase view data or reduce, and the application is not restricted this.

Please continue to refer to Fig. 4, when GTG corresponding to view data inputted for depart from GTG X and X-N > 0 time, such as, when selecting the pattern 1 in this list:

When the 1st frame, do not process view data, namely input image data is the view data that correspondence departs from GTG X, optimizes after unit, still export original digital image data through gamma;

When the 2nd frame, process view data, namely input image data is the view data that correspondence departs from GTG X, and optimize after unit through gamma, output image data is the view data of corresponding GTG (X-1);

When the 3rd and the 4th frame, the same with the 2nd frame, process view data, namely input image data is the view data that correspondence departs from GTG X, and optimize after unit through gamma, output image data is the view data of corresponding GTG (X-1).

Due in time, human eye has an effect of being detained to the image seen, thus, after 4 frames, the brightness that human eye is seen, the i.e. GTG of display display, also an average effect can be produced, such as, in pattern 1, the brightness seen is the brightness that GTG (X-3/4) is corresponding, i.e. average GTG after adjustment.Average gray-scale value Y is GTG (X-3/4), between GTG X and GTG (X-1), than departing from GTG X closer to its standard value N, namely meets | Y-N| < | and X-N|, thus display GTG is adjusted.

Continue known with reference to figure 4, in gamma adjustment method provided by the invention and pattern, the adjustment of very refinement can be carried out to display GTG, concrete, when input image data be correspondence depart from GTG X time, after the adjustment of 4 frames, the brightness that human eye is seen, namely average GTG Y can be GTG (X-3B/4), GTG (X-2B/4), GTG (X-1B/4), GTG (X+1B/4), GTG (X+2B/4) or GTG (X+3B/4), when being 1 to the adjusting range of view data, the adjustment of most refinement can be obtained.Certainly, depart from if a certain the deviation of GTG X very large time, when the adjusting range of view data is 2, can more effectively, more accurately adjust.

In addition, the pattern write in described retrieve data table 220 is more than above-mentioned disclosed several.As preferred embodiments, when GTG corresponding to view data inputted is for departing from GTG X, from the retrieve data table 220 shown in Fig. 4, select average GTG Y closest to a kind of tupe of standard value N, namely | a kind of tupe that the value of Y-N| is minimum processes input data.By the selection to pattern in retrieve data table 220, can adjust departing from GTG X easily.

Fig. 8 is yet another embodiment of the invention schematic diagram, can further improve the display effect of the rear picture of adjustment, in the present embodiment, if the data that m neighbor inputs are all corresponding samely depart from GTG X or corresponding same offset direction simultaneously, namely be all greater than standard value or be all less than standard value, then a described m neighbor being carried out display adjustment as one group.In a liquid crystal display, when the GTG exported changes, corresponding human eye can the change of sensed luminance, when output GTG is standard gray scale, described standard gray scale continues A frame, in this A frame, the brightness of the pixel of display standard gray scale is constant, when exporting GTG for departing from GTG, liquid crystal display can according to gamma adjustment method disclosed by the invention to departing from GTG adjustment, namely, in A frame, it is vicissitudinous for exporting the grey decision-making departing from the pixel of GTG, and namely brightness is also vicissitudinous.The area of single pixel is very little, if depart from GTG adjustment only to single pixel, human eye may not observe the change of brightness, but all for departing from GTG when the GTG that adjacent m pixel exports while, and depart from GTG adjustment at same frame to described simultaneously, human eye probably just can observe obvious brightness change, thus flicker may be caused bad.

In the present embodiment, get m neighbor be one group carry out display adjustment, and when the frame number that each pixel carries out GTG adjustment is different, with suppress when the data that a described m pixel inputs simultaneously all corresponding same depart from GTG X or corresponding same offset direction depart from GTG time, the flicker that liquid crystal display may occur is bad.

In the present embodiment, for 4 neighbors, namely the value of m gets 4, and the data that simultaneously input of described 4 pixels are all corresponding samely departs from GTG X.As shown in Figures 5 to 7,4 pixels are adjacent, and it can occupy two adjacent row two row, also can occupy adjacent four lines or four row.

Concrete, when please refer to the Fig. 8: the 1 frame, GTG corresponding to pixel 1, pixel 2 and pixel 3 input image data is for departing from GTG X, and optimize after unit through gamma, the view data of output is still original digital image data; GTG corresponding to pixel 4 input image data is still for departing from GTG X, optimize after unit through gamma, the GTG that output image data is corresponding is GTG (X+1), thus, spatially, during the 1st frame, 4 pixel display GTGs, the i.e. brightness seen of human eye, is average GTG (X+1/4);

During the 2nd frame, GTG corresponding to pixel 1, pixel 2 and pixel 4 input image data is for departing from GTG X, and optimize after unit through gamma, the view data of output is still original digital image data; GTG corresponding to pixel 3 input image data is for departing from GTG X, optimize after unit through gamma, the GTG that output image data is corresponding is GTG (X+1), thus, spatially, during the 2nd frame, 4 pixel display GTGs, the i.e. brightness seen of human eye, i.e. average GTG (X+1/4);

During the 3rd frame, GTG corresponding to pixel 1, pixel 3 and pixel 4 input image data is for departing from GTG X, and optimize after unit through gamma, the view data of output is still original digital image data; GTG corresponding to pixel 2 input image data is for departing from GTG X, optimize after unit through gamma, the GTG that output image data is corresponding is GTG (X+1), thus, spatially, during the 3rd frame, 4 pixel display GTGs, the i.e. brightness seen of human eye, i.e. average GTG (X+1/4);

During the 4th frame, GTG corresponding to pixel 2, pixel 3 and pixel 4 input image data is for departing from GTG X, and optimize after unit through gamma, the view data of output is still original digital image data; GTG corresponding to pixel 1 input image data is for departing from GTG X, optimize after unit through gamma, the GTG that output image data is corresponding is GTG (X+1), thus, spatially, during the 4th frame, 4 pixel display GTGs, the i.e. brightness seen of human eye, i.e. average GTG (X+1/4).

Thus, through above-mentioned continuous 4 frames, for described 4 pixel entirety, the equal corresponding GTG (X+1/4) of brightness that each frame human eye is seen; And through above-mentioned continuous 4 frames, the average GTG of each pixel display also be GTG (X+1/4) thus, display more smoothly, inhibits the appearance of film flicker.

In the prior art, because the voltage of red (R), green (G), blue (B) three primary colours is different with liquid crystal transmitance, when carrying out gamma and adjusting, can adjust respectively described three primary colours.Please refer to Fig. 9, it is schematic diagram R, G, B being carried out respectively to the gamma adjusting device of gamma adjustment of further embodiment of this invention.As shown in Figure 9, respectively the view data of the pixel of R, G, B is adjusted respectively by the first gamma adjusting device, the second gamma adjusting device and the 3rd gamma adjusting device.

In addition, the existing pass of illuminometer that gamma correction only presents with display, and do not have relation with the display technique that display adopts, due to other displays, such as also there is gamma electric voltage in similar liquid crystal display and be difficult to the problem of accurate adjustment in CRT monitor, PDP display, therefore, in the present invention above-mentioned disclosed content also adaptability be applicable in other displays, its use principle is identical, and the application repeats no more this.

Foregoing description is only the description to present pre-ferred embodiments, any restriction not to the scope of the invention, any change that the those of ordinary skill in field of the present invention does according to above-mentioned disclosure, all belongs to the protection domain of claims.

Claims

1. a gamma adjustment method, comprising:

Step S2: the standard value N that GTG X is corresponding is provided described in separately providing, and Ji Suan ∣ X-N ∣, described standard value N is the standard gray scale according to obtaining after gamma correction;

Step S3: when the GTG of the gamma electric voltage display that the view data inputted is selected is standard gray scale, described standard gray scale continues A frame, and A is the treatment cycle of adjustment, and described A is more than or equal to 2;

Step S4: when the GTG of the gamma electric voltage display that the view data inputted is selected is for departing from GTG X, adjust departing from GTG X, the mean value Y Man Zu ∣ Y-N ∣ < ∣ X-N ∣ of the GTG that A frame is shown.

2. gamma adjustment method as claimed in claim 1, is characterized in that, depart from GTG X and be greater than standard value N.

3. gamma adjustment method as claimed in claim 1, is characterized in that, depart from GTG X and be less than standard value N.

4. gamma adjustment method as claimed in claim 1, is characterized in that, adjusting, the adjustment modes that Xuan Ze ∣ Y-N ∣ is minimum to departing from GTG X.

5. gamma adjustment method as claimed in claim 1, is characterized in that, changes the value of the view data of input, adjusts the described GTG X that departs from.

6. gamma adjustment method as claimed in claim 1, it is characterized in that, be 1 ~ 2 to the adjusting range departing from GTG X.

7. gamma adjustment method as claimed in claim 1, is characterized in that, carries out display adjustment using m neighbor as one group.

8. gamma adjustment method as claimed in claim 7, is characterized in that, the view data that a described m neighbor inputs simultaneously corresponds to and samely departs from GTG, or correspondence is multiple departs from GTG, and described multiple offset direction departing from GTG is identical.

9. gamma adjustment method as claimed in claim 1, is characterized in that, the gamma value that described gamma correction uses is 2.2.

10. gamma adjustment method as claimed in claim 1, is characterized in that, comprising multiple tupe, selecting the view data of any one tupe to input to adjust rear output to departing from GTG X adjustment.

11. gamma adjustment method as claimed in claim 1, is characterized in that, adjust respectively to the view data of R, G, B.

12. 1 kinds of gamma adjusting devices, is characterized in that, comprising: electric resistance partial pressure unit, Multipexer selector switch and gamma optimize unit; Wherein,

Described electric resistance partial pressure unit utilizes multiple input voltage, produce one group of gamma electric voltage, the corresponding above-mentioned gamma electric voltage of each view data, each gamma electric voltage shows a corresponding GTG, multiple described GTG comprises and departs from GTG X and standard gray scale, and exports the gamma electric voltage corresponding with view data to described Multipexer selector switch;

Described gamma optimizes unit output image data to described Multipexer selector switch; The GTG that described gamma optimizes the view data of unit corresponding if input is standard gray scale, then export the view data of former input; The GTG that described gamma optimizes the view data of unit corresponding if input departs from GTG, then export the view data of former input or the view data after adjustment;

Described Multipexer selector switch optimizes the view data of unit output according to described gamma, selects a gamma electric voltage and exports;

Wherein, described gamma is optimized unit and comprises retrieve data table and frame rate control module, and described retrieve data table comprises the tupe of multiple gamma adjustment, and described frame rate control module is in order to control the frame number of the treatment cycle of gamma adjustment;

Wherein, described in providing, depart from the standard value N that GTG X is corresponding, and Ji Suan ∣ X-N ∣, described standard value N is the standard gray scale according to obtaining after gamma correction; When the GTG of the gamma electric voltage display that the view data inputted is selected is standard gray scale, described standard gray scale continues A frame, and A is the treatment cycle of adjustment, and described A is more than or equal to 2; When the GTG of the gamma electric voltage display that the view data inputted is selected is for departing from GTG X, adjust departing from GTG X, the mean value Y Man Zu ∣ Y-N ∣ < ∣ X-N ∣ of the GTG that A frame is shown.

13. gamma adjusting devices as claimed in claim 12, is characterized in that, the quantity that described gamma optimizes unit is three, respectively in order to export the view data of R, G, B three primary colours.