CN104299565A - Low grey scale correction method and system of LED display device - Google Patents
Low grey scale correction method and system of LED display device Download PDFInfo
- Publication number
- CN104299565A CN104299565A CN201410538656.9A CN201410538656A CN104299565A CN 104299565 A CN104299565 A CN 104299565A CN 201410538656 A CN201410538656 A CN 201410538656A CN 104299565 A CN104299565 A CN 104299565A
- Authority
- CN
- China
- Prior art keywords
- described multiple
- gtg
- brightness
- adjustment factor
- led display
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
The invention relates to a low grey scale correction method and system of an LED display device. The method comprises the steps that (a) the LED display device is controlled to display colors of multiple gray scales, and data acquisition is carried out on the colors of multiple gray scales so as to at least acquire multiple brightness measurement values corresponding to the multiple gray scales, wherein the colors are the same basic color, and the multiple gray scales are part of gray scales, within a low grey scale range, of all gray scales corresponding to the basic color; (b) multiple regulation coefficients corresponding to the multiple gray scales are acquired at least through the difference between the acquired multiple brightness measurement values and brightness target values corresponding to the multiple gray scales, and the multiple regulation coefficients are uploaded to the LED display device so that the LED display device can change the LED driving current according to the multiple regulation coefficients when displaying the multiple grey scales and the multiple grey scales can be corrected. According to the low grey scale correction method and system of the LED display device, by correcting the low grey scales one by one, the LED display device can make a linear response to current signals when displaying the low grey scales.
Description
Technical field
The present invention relates to technical field of LED display, particularly a kind of low gray scale correction method of LED display and a kind of low gray scale correction system of LED display.
Background technology
Gray scale i.e. so-called GTG, refer to the bright-dark degree of brightness; Show in industry at LED, refer in particular to the luminosity of often kind of primary colours.Being divided by intensity size by the luminosity of primary colours, is exactly gray level.The gray level that LED display can produce is higher, and color and the image level of display are more.For digitized display technique, gray scale is the determinative of display color number.Generally speaking gray scale is higher, and the color of display is abundanter, and picture is also finer and smoother, more easily shows abundant details.
In digitization system, the ability that gray level controls is represented by number of grey levels.So-called number of grey levels just refer to the gray level grade can carrying out controlling number.Such as can control the gray scale of 16 ranks, its number of grey levels is exactly 16.In digital circuit, represent 16 different numbers with 4bit binary number.Can see, the bit quantity controlled for gray level is more, and the gray level that can produce is larger, and the image shown is finer and smoother.
Gray shade scale depends primarily on the digital-to-analog conversion figure place of disposal system, and the video frequency processing chip of certain system, storer and transmission system all will provide the support of corresponding figure place.Current LED display mainly adopts: (a) 8 disposal systems, is also 256 (8 powers of 2) level gray scale, and simple understanding is exactly from black to having 256 kinds of brightness changes in vain; B () 10 disposal systems are also 1024 (10 powers of 2) level gray scale, simple understanding is exactly from black to having 1024 kinds of brightness changes in vain; C () 12 disposal systems are also 4096 (12 powers of 2) level gray scale, simple understanding is exactly from black to having 4096 kinds of brightness changes in vain; And (d) 14 disposal systems, be also 16384 (14 powers of 2) level gray scale, simple understanding is exactly from black to having 16384 kinds of brightness changes in vain.
In practice, LED display is linear luminescent device, but has been not just linearly when electric current pulse width (namely low ash).When electric current pulsewidth is very narrow time, the driving chip of LED display and LED all can departs from linear to the response of electric current.In addition also have the factor impacts such as the unevenness of the discreteness of the discreteness of the discreteness of the discreteness of LED, driving chip, LED light axle, face shield mass colour, inside modules heat distribution and cause LED display to the response departs from linear of current signal.
Summary of the invention
For overcoming defect and the deficiency of prior art existence, the present invention proposes a kind of low gray scale correction method of LED display and a kind of low gray scale correction system of LED display, responds when showing low GTG to make LED display to current signal linear.
Particularly, the low gray scale correction method of a kind of LED display that the embodiment of the present invention provides, comprise step: (S1) controls LED display and show the color of multiple GTG and carry out data acquisition at least to obtain described multiple GTG multiple brightness measurements corresponding respectively to the color of described multiple GTG, wherein said color is same primary colours, and is positioned at the part gray-scale of low grey-scale range in described multiple GTG all GTGs that to be described primary colours corresponding; And (b) at least utilizes the difference between described multiple brightness measurements and the corresponding respectively multiple brightness target value of described multiple GTG to obtain multiple adjustment factors corresponding to described multiple GTG, and described multiple adjustment factor is uploaded to described LED display for described LED display when showing described multiple GTG according to described multiple adjustment factor change LED drive current thus the correction of the how described multiple GTG of realization.
In one embodiment of the invention, the color of above-mentioned multiple GTG is for sequentially to show.
In one embodiment of the invention, the color of above-mentioned multiple GTG is that subregion shows simultaneously.
In one embodiment of the invention, above-mentioned steps (b) comprising: utilize the difference between described multiple brightness measurements and described multiple brightness target value to calculate multiple brightness correction coefficients respectively as described multiple adjustment factor respectively.
In one embodiment of the invention, above-mentioned steps (a) comprises carries out data acquisition to obtain described multiple GTG many groups bright chroma measured value corresponding respectively to the color of described multiple GTG, and above-mentioned steps (b) comprising: utilize the difference between described many group bright chroma measured values multiple bright chroma desired value corresponding respectively with described multiple GTG to calculate multiple bright chroma correction coefficient respectively as described multiple adjustment factor respectively; Wherein, each bright chroma correction coefficient is a matrix of coefficients.
In one embodiment of the invention, above-mentioned steps (b) comprising: utilize the difference between described multiple brightness measurements with described multiple brightness target value to calculate described multiple GTG multiple brightness ratio corresponding respectively respectively; And utilize described multiple brightness ratio to revise described multiple GTG multiple gamma values corresponding respectively to obtain multiple target gamma value as described multiple adjustment factor respectively.
In one embodiment of the invention, above-mentioned steps (b) comprising: utilize the difference between described multiple brightness measurements with described multiple brightness target value to calculate described multiple GTG multiple brightness ratio corresponding respectively respectively; And utilize described multiple brightness ratio to revise OE width corresponding described in the bit of binary code corresponding to described multiple GTG to obtain multiple target OE width as described multiple adjustment factor.
In addition, the low gray scale correction system of a kind of LED display that the embodiment of the present invention provides, comprising: transmission module on display control module, data acquisition module, adjustment factor computing module and adjustment factor.Particularly, display control module shows the color of multiple GTG for controlling described LED display, and wherein said color is same primary colours, and is positioned at the part gray-scale of low grey-scale range in described multiple GTG all GTGs that to be described primary colours corresponding.Data acquisition module is used for carrying out data acquisition at least to obtain described multiple GTG multiple brightness measurements corresponding respectively to the color of described multiple GTG.Adjustment factor computing module is used at least utilizing the difference between described multiple brightness measurements multiple brightness target value corresponding with described multiple GTG difference to obtain multiple adjustment factors corresponding to described multiple GTG.On adjustment factor, transmission module is used for described multiple adjustment factor to be uploaded to described LED display, changes LED drive current thus realize the correction to described multiple GTG for described LED display when showing described multiple GTG according to described multiple adjustment factor.
In one embodiment of the invention, above-mentioned adjustment factor computing module specifically for: utilize the difference between described multiple brightness measurements and described multiple brightness target value to calculate multiple brightness correction coefficients respectively as described multiple adjustment factor respectively.Or, described data acquisition module specifically for carrying out data acquisition to the color of described multiple GTG to obtain described multiple GTG multiple bright chroma measured value corresponding respectively, and described adjustment factor computing module specifically for: utilize the difference between described many group bright chroma measured values many groups bright chroma desired value corresponding respectively with described multiple GTG to calculate multiple bright chroma correction coefficient respectively as described multiple adjustment factor respectively; Wherein, each bright chroma correction coefficient is a matrix of coefficients.
In one embodiment of the invention, above-mentioned adjustment factor computing module specifically for: utilize the difference between described multiple brightness measurements with described multiple brightness target value to calculate described multiple GTG multiple brightness ratio corresponding respectively respectively, and utilize multiple gamma values of the described multiple GTG of described multiple brightness ratio amendment correspondence respectively to obtain multiple target gamma value as described multiple adjustment factor respectively.
In one embodiment of the invention, above-mentioned adjustment factor computing module specifically for: utilize the difference between described multiple brightness measurements with described multiple brightness target value to calculate described multiple GTG multiple brightness ratio corresponding respectively respectively, and utilize described multiple brightness ratio to revise the OE width corresponding to bit of binary code corresponding to described multiple GTG to obtain multiple target OE width as described multiple adjustment factor.
The embodiment of the present invention is by carrying out calibration one by one to low GTG, LED display such as LED display can be realized respond current signal linear when low GTG display, improve sharpness and the sophistication of LED display picture when low gray scale, can solve electric current pulsewidth very narrow time, the driving chip of LED display and LED all can the problems of departs from linear to the response of electric current, and the discreteness that can solve due to LED, the discreteness of driving chip, the discreteness of LED light axle, the discreteness of face shield mass colour, the impact of the factors such as unevenness of inside modules heat distribution and the LED display that causes are to the problem of the response departs from linear of electric current.
By the detailed description below with reference to accompanying drawing, other side of the present invention and feature become obvious.But it should be known that this accompanying drawing is only the object design of explanation, instead of as the restriction of scope of the present invention, this is because it should with reference to additional claim.Should also be appreciated that, unless otherwise noted, unnecessaryly draw accompanying drawing to scale, they only try hard to structure described herein and flow process are described conceptually.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.
Figure 1A and Figure 1B is two kinds of display mode schematic diagram of the color of multiple low GTG in the low gray scale correction method of the LED display of first embodiment of the invention.
Fig. 2 is the waveform schematic diagram in the low gray scale correction method of the LED display of third embodiment of the invention.
Fig. 3 is the module diagram of the low gray scale correction system of a kind of LED display of fourth embodiment of the invention.
Embodiment
For enabling above-mentioned purpose of the present invention, feature and advantage become apparent more, are described in detail the specific embodiment of the present invention below in conjunction with accompanying drawing.
[the first embodiment]
The technical scheme of the low gray scale correction method of first embodiment of the invention LED display mainly comprises two steps: first obtain many groups bright chroma measured value that described multiple low GTG is corresponding respectively, then calculating multiple low GTG multiple correction coefficient corresponding respectively as adjustment factor is uploaded to LED display, thus makes LED display to current signal response be linear when low GTG display.In the present embodiment, LED display such as comprises the display control program of LED screen body and electrical connection LED screen body.Particularly:
Obtaining in multiple low GTG many groups bright chroma measured value process corresponding respectively: the color first controlling the multiple low GTG of LED display display, the method of display can be make whole screen all show the color of certain GTG and multiple low GTG sequentially shows, such as, shown in Figure 1A; Also can be the color using the shape subregion of trellis diagram once to show multiple low GTG, such as, shown in Figure 1B.After the color controlling the multiple low GTG of LED display display, the bright chroma measured value Lxy that data acquisition answers with the Color pair obtaining each low GTG is carried out respectively to the color of multiple low GTG of display.In the present embodiment, the implementation method of data acquisition has multiple: (1) records again and again light tone angle value Lxy by light splitting type colorimeter, and precision is the highest but efficiency is lower; (2) obtain light tone angle value Lxy by the industrial camera of band XYZ filter disc, precision is higher, efficiency is higher, but the industrial camera price of band XYZ filter disc is more expensive; (3) obtain light tone angle value Lxy by common color digital camera, first obtained the RGB numerical value of each LED point by color digital camera, then change RGB numerical value into XYZ numerical value, and then obtain light tone angle value Lxy.Conversion method in said method (3) can be: modelling, look-up table (LUT, Look up Table), neural network etc.Wherein, modelling is by founding mathematical models, realizes the linear or nonlinear transformation between RGB=XYZ.Such as S-curve model, Masking model, GOG (Gain-Offset-Gamma) model or multinomial model etc.Look-up table is the look-up table setting up an one dimension or three-dimensional (3D-LUT), look-up table adopts the algorithm of interpolation or extrapolation, find out the corresponding relation between RGB=XYZ, the point value dropped on sampling grid summit is summit value, and around the point not on summit adopts, nearest summit value is obtained by interpolation algorithm.Neural net method is exactly the characteristic utilizing artificial neural network nonlinear transformation, sets up the mapping relations of RGB=XYZ (forward network), and the suitable space distribution choosing network structure and training sample set, can obtain higher precision.
Be uploaded in the process of LED display as adjustment factor calculating multiple low GTG multiple correction coefficient corresponding respectively: first calculate the correction coefficient that each low GTG is corresponding respectively, then correction coefficient is uploaded to LED display as adjustment factor.
Wherein, calculate the correction coefficient that each low GTG is corresponding respectively, gamma correction and chromaticity correction two kinds can be divided into:
Gamma correction is the brightness only changing monochromatic LED lamp:
R_LED
out＝a
11R_LED
in；
G_LED
out＝a
22G_LED
in；
B_LED
out＝a
33B_LED
in；
Chromaticity correction is the brightness not only changing monochromatic LED lamp, also changes its colourity by adding other monochromatic LED lamps, therefore usually also claims chromaticity correction to be that bright chroma corrects:
In above formula, R_LED
in, G_LED
in, B_LED
inthe bright chroma measured value of three primary colours (red, green, the blue) LED respectively before representative correction, R_LED
out, G_LED
out, B_LED
outrepresentative needs the bright chroma desired value of the three-primary color LED lamp reached, a respectively
11, a
22, a
33for brightness correction coefficients,
For bright chroma correction coefficient and be a matrix of coefficients.
Following citing, the grey exponent number for certain each primary colours is the LED display of 255, to electric current linear response when need be allowed to condition at low GTG, by its low grey-scale range, carries out calibration one by one, just can reach demand to 10 low GTGs; Namely also first embodiment of the invention is that the part gray-scale being positioned at low grey-scale range in all GTGs (255 GTGs) to each primary colours carries out calibration one by one.Concrete bearing calibration can be: first, measures the light tone angle value Lxy that 10 low GTGs are corresponding respectively respectively; Secondly, bright chroma desired value corresponding to each GTG in these 10 low GTGs and the difference between bright chroma measured value Lxy is utilized to carry out calculating the light tone correction coefficient that in these 10 low GTGs, each GTG is corresponding; Finally, the bright chroma correction coefficient that these 10 the low GTGs calculated are corresponding is respectively uploaded to LED display to store.Afterwards, when low GTG display, LED display shows certain low GTG, and the bright chroma correction coefficient will extracting this GTG corresponding corrects this GTG, then just carries out showing and reaching target bright chroma.In this citing, be understandable that, also can only calculate brightness correction coefficients and omit chromaticity correction coefficient, it also can reach the object of low gray scale correction.In the present embodiment, by obtaining brightness correction coefficients or the bright chroma correction coefficient of each low GTG one by one, it is in fact the LED drive current in order to change during the display of low GTG.
[the second embodiment]
The technical scheme of the low gray scale correction method of second embodiment of the invention LED display mainly comprises two steps: first obtain multiple brightness measurements that described multiple low GTG is corresponding respectively, then obtaining described multiple low GTG multiple target gamma values corresponding respectively after revising the part gamma value in Gamma (gamma) mapping table as adjustment factor is uploaded to the Gamma mapping table that LED display stores to upgrade LED display, thus LED display is responded current signal when low GTG display is linear.In the present embodiment, LED display such as comprises the display control program of LED screen body and electrical connection LED screen body.Particularly:
Obtaining in multiple low GTG multiple brightness measurements processes corresponding respectively: the color first controlling the multiple low GTG of LED display display, the method of display can be make whole screen all show the color of certain GTG and multiple low GTG sequentially shows, and also can be the color using the shape subregion of trellis diagram once to show multiple low GTG.After the color controlling the multiple low GTG of LED display display, the bright chroma measured value Lxy that data acquisition answers with the Color pair obtaining each low GTG is carried out respectively to the color of multiple low GTG of display.In the present embodiment, the implementation method of data acquisition has multiple: (1) records again and again light tone angle value Lxy by light splitting type colorimeter, and precision is the highest but efficiency is lower; (2) obtain light tone angle value Lxy by the industrial camera of band XYZ filter disc, precision is higher, efficiency is higher, but the industrial camera price of band XYZ filter disc is more expensive; (3) obtain light tone angle value Lxy by common color digital camera, first obtained the RGB numerical value of each LED point by color digital camera, then change RGB numerical value into XYZ numerical value, and then obtain light tone angle value Lxy.Conversion method in said method (3) can be: modelling, look-up table (LUT, Look up Table), neural network etc.Wherein, modelling is by founding mathematical models, realizes the linear or nonlinear transformation between RGB=XYZ.Such as S-curve model, Masking model, GOG (Gain-Offset-Gamma) model or multinomial model etc.Look-up table is the look-up table setting up an one dimension or three-dimensional (3D-LUT), look-up table adopts the algorithm of interpolation or extrapolation, find out the corresponding relation between RGB=XYZ, the point value dropped on sampling grid summit is summit value, and around the point not on summit adopts, nearest summit value is obtained by interpolation algorithm.Neural net method is exactly the characteristic utilizing artificial neural network nonlinear transformation, sets up the mapping relations of RGB=XYZ (forward network), and the suitable space distribution choosing network structure and training sample set, can obtain higher precision.
In the process of amendment Gamma mapping table: first calculate the brightness measurements of each low GTG and the brightness ratio of brightness target value, then utilize the brightness ratio calculated to revise gamma value corresponding to each low GTG respectively and be uploaded to LED display to obtain multiple target gamma value as adjustment factor.
Calculate the brightness ratio ratio (or claiming luminance difference) of certain GTG:
R_L
out＝ratio
RR_L
in；
G_L
out＝ratio
GG_L
in；
B_L
out＝ratio
BB_L
in；
Revise the Gamma value that this GTG is corresponding:
R_Gamma
out＝ratio
RR_Gamma
in；
G_Gamma
out＝ratio
GG_Gamma
in；
B_Gamma
out＝ratio
BB_Gamma
in；
In above formula, R_LED
in, G_LED
in, B_LED
inthe bright chroma measured value of three primary colours (red, green, the blue) LED respectively before representative correction, R_LED
out, G_LED
out, B_LED
outrepresentative needs the bright chroma desired value of the three-primary color LED lamp reached, ratio respectively
r, ratio
g, ratio
brepresent the brightness ratio of this GTG of three primary colours respectively, R_Gamma
in, G_Gamma
in, B_Gamma
inrepresent the Gamma value before this gray scale correction of three primary colours respectively, R_Gamma
out, G_Gamma
out, B_Gamma
outrepresent the Gamma value after this gray scale correction of three primary colours respectively.
Following citing, the grey exponent number for certain each primary colours is the LED display of 255, to electric current linear response when need be allowed to condition at low GTG, by its low grey-scale range, carries out calibration one by one, just can reach demand to 10 low GTGs; Namely also second embodiment of the invention is that the part gray-scale being positioned at low grey-scale range in all GTGs (255 GTGs) to each primary colours carries out calibration one by one.Concrete bearing calibration can be: first, measures the brightness value L that 10 low GTGs are corresponding respectively respectively; Secondly, brightness target value corresponding to each GTG in these 10 low GTGs and the difference between brightness measurements L is utilized to carry out calculating the brightness ratio that in these 10 low GTGs, each GTG is corresponding; Finally, utilize Gamma value corresponding to these 10 low GTGs of calculating brightness ratio corresponding respectively amendment and obtain multiple target Gamma value and be uploaded to LED display to upgrade the Gamma mapping table of LED display storage as adjustment factor.Afterwards, when low GTG display, LED display shows certain low GTG, and the Gamma mapping table after renewal will be utilized to correct this GTG, then just carries out showing and reaching object brightness.In the present embodiment, by upgrading Gamma mapping table, it is in fact the LED drive current in order to change during the display of low GTG.
[the 3rd embodiment]
The technical scheme of the low gray scale correction method of third embodiment of the invention LED display mainly comprises two steps: first obtain multiple brightness measurements that described multiple low GTG is corresponding respectively, then the OE width corresponding to bit (Bit) position revising binary code corresponding to each low GTG obtains multiple target OE width as adjustment factor and is uploaded to LED display with OE width corresponding to the bit of each the low GTG upgrading LED display and store, thus makes LED display be linear when low GTG display to current signal response.In the present embodiment, LED display such as comprises the display control program of LED screen body and electrical connection LED screen body.Particularly:
Obtaining in multiple low GTG multiple brightness measurements processes corresponding respectively: the color first controlling the multiple low GTG of LED display display, the method of display can be make whole screen all show the color of certain GTG and multiple low GTG sequentially shows, such as, shown in Figure 1A; Also can be the color using the shape subregion of trellis diagram once to show multiple low GTG, such as, shown in Figure 1B.After the color controlling the multiple low GTG of LED display display, the bright chroma measured value Lxy that data acquisition answers with the Color pair obtaining each low GTG is carried out respectively to the color of multiple low GTG of display.In the present embodiment, the implementation method of data acquisition has multiple: (1) records again and again light tone angle value Lxy by light splitting type colorimeter, and precision is the highest but efficiency is lower; (2) obtain light tone angle value Lxy by the industrial camera of band XYZ filter disc, precision is higher, efficiency is higher, but the industrial camera price of band XYZ filter disc is more expensive; (3) obtain light tone angle value Lxy by common color digital camera, first obtained the RGB numerical value of each LED point by color digital camera, then change RGB numerical value into XYZ numerical value, and then obtain light tone angle value Lxy.Conversion method in said method (3) can be: modelling, look-up table (LUT, Look up Table), neural network etc.Wherein, modelling is by founding mathematical models, realizes the linear or nonlinear transformation between RGB=XYZ.Such as S-curve model, Masking model, GOG (Gain-Offset-Gamma) model or multinomial model etc.Look-up table is the look-up table setting up an one dimension or three-dimensional (3D-LUT), look-up table adopts the algorithm of interpolation or extrapolation, find out the corresponding relation between RGB=XYZ, the point value dropped on sampling grid summit is summit value, and around the point not on summit adopts, nearest summit value is obtained by interpolation algorithm.Neural net method is exactly the characteristic utilizing artificial neural network nonlinear transformation, sets up the mapping relations of RGB=XYZ (forward network), and the suitable space distribution choosing network structure and training sample set, can obtain higher precision.
In the process revising the OE width corresponding to bit (Bit) position of binary code corresponding to each low GTG: first calculate the brightness measurements of each low GTG and the brightness ratio of brightness target value, the OE width corresponding to bit then utilizing the brightness ratio calculated to revise binary code corresponding to each low GTG is respectively uploaded to LED display to obtain multiple target OE width as adjustment factor.The account form of target OE width is identical with the account form of target Gamma value, does not repeat them here.
Following citing, supposes that the binary code that GTG as low in certain is corresponding on hardware is 0111, as shown in Figure 2.In fig. 2, the corresponding binary code 0100 (corresponding GTG 4) of waveform P1, the corresponding binary code 0010 (corresponding GTG 2) of waveform P2, the corresponding binary code 0001 (corresponding GTG 1) of waveform P3.
After the brightness measurements recording low GTG, if GTG corresponding to certain bit is forbidden, then brightness ratio can be utilized to revise OE width corresponding to this bit (width of waveform), change this GTG whereby.Therefore, after revising OE width corresponding to each bit, the LED drive current exported when LED display carries out the display of low gray scale can corresponding change, thus makes the brightness of each low GTG can be consistent with object brightness.
[the 4th embodiment]
Refer to Fig. 3, fourth embodiment of the invention provides a kind of low gray scale correction system of LED display.As described in Figure 3, the low gray scale correction system of the present embodiment comprises: transmission module 37 on display control module 31, data acquisition module 33, adjustment factor computing module 35 and adjustment factor.Particularly, display control module 31 shows the color of multiple GTG for controlling described LED display (such as LED display), wherein said color is same primary colours (such as red, green or blue), and is positioned at the part gray-scale of low grey-scale range in described multiple GTG all GTGs that to be described primary colours corresponding.Data acquisition module 33 is for carrying out data acquisition at least to obtain described multiple GTG multiple brightness measurements corresponding respectively to the color of described multiple GTG.Adjustment factor computing module 35 obtains multiple adjustment factors corresponding to described multiple GTG at least utilizing the difference between described multiple brightness measurements multiple brightness target value corresponding with described multiple GTG difference.On adjustment factor, transmission module 37 is for being uploaded to described LED display by described multiple adjustment factor, changes LED drive current thus realize the correction to described multiple GTG for described LED display when showing described multiple GTG according to described multiple adjustment factor.In addition, the low gray scale correction system of fourth embodiment of the invention can be used for the low gray scale correction method performing the aforementioned first to the 3rd embodiment, and detail with reference to aforementioned explanation, can not repeat them here.
In sum, the embodiment of the present invention is by carrying out calibration one by one to low GTG, LED display such as LED display can be realized respond current signal linear when low GTG display, improve sharpness and the sophistication of LED display picture when low gray scale, can solve electric current pulsewidth very narrow time, the driving chip of LED display and LED all can the problems of departs from linear to the response of electric current, and the discreteness that can solve due to LED, the discreteness of driving chip, the discreteness of LED light axle, the discreteness of face shield mass colour, the impact of the factors such as unevenness of inside modules heat distribution and the LED display that causes are to the problem of the response departs from linear of electric current.
So far, apply specific case herein and set forth the principle of the low gray scale correction method and system of LED display of the present invention and embodiment, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping; Meanwhile, for one of ordinary skill in the art, according to thought of the present invention; all will change in specific embodiments and applications; in sum, this description should not be construed as limitation of the present invention, and protection scope of the present invention should be as the criterion with appended claim.
Claims (11)
1. a low gray scale correction method for LED display, is characterized in that, comprise step:
A () controls LED display and shows the color of multiple GTG and carry out data acquisition at least to obtain described multiple GTG multiple brightness measurements corresponding respectively to the color of described multiple GTG, wherein said color is same primary colours, and is positioned at the part gray-scale of low grey-scale range in described multiple GTG all GTGs that to be described primary colours corresponding; And
B () at least utilizes the difference between described multiple brightness measurements and the corresponding respectively multiple brightness target value of described multiple GTG to obtain multiple adjustment factors corresponding to described multiple GTG, and described multiple adjustment factor is uploaded to described LED display for described LED display when showing described multiple GTG according to described multiple adjustment factor change LED drive current thus the correction of realization to described multiple GTG.
2. low gray scale correction method as claimed in claim 1, is characterized in that, the color of described multiple GTG is for sequentially to show.
3. low gray scale correction method as claimed in claim 1, is characterized in that, the color of described multiple GTG is that subregion shows simultaneously.
4. low gray scale correction method as claimed in claim 1, it is characterized in that, described step (b) comprising:
The difference between described multiple brightness measurements and described multiple brightness target value is utilized to calculate multiple brightness correction coefficients respectively as described multiple adjustment factor respectively.
5. low gray scale correction method as claimed in claim 1, it is characterized in that, described step (a) comprises carries out data acquisition to obtain described multiple GTG many groups bright chroma measure value corresponding respectively to the color of described multiple GTG, and described step (b) comprising:
The difference between described many group bright chroma measured values many groups bright chroma desired value corresponding respectively with described multiple GTG is utilized to calculate multiple bright chroma correction coefficient respectively as described multiple adjustment factor respectively; Wherein, each bright chroma correction coefficient is a matrix of coefficients.
6. low gray scale correction method as claimed in claim 1, it is characterized in that, described step (b) comprising:
The difference between described multiple brightness measurements with described multiple brightness target value is utilized to calculate described multiple GTG multiple brightness ratio corresponding respectively respectively; And
Described multiple brightness ratio is utilized to revise described multiple GTG multiple gamma values corresponding respectively to obtain multiple target gamma value as described multiple adjustment factor respectively.
7. low gray scale correction method as claimed in claim 1, it is characterized in that, described step (b) comprising:
The difference between described multiple brightness measurements with described multiple brightness target value is utilized to calculate described multiple GTG multiple brightness ratio corresponding respectively respectively; And
Utilize the OE width corresponding to bit of the binary code that the described multiple GTG of described multiple brightness ratio amendment is corresponding to obtain multiple target OE width as described multiple adjustment factor.
8. a low gray scale correction system for LED display, is characterized in that, comprising:
Display control module, shows the color of multiple GTG for controlling described LED display, wherein said color is same primary colours, and is positioned at the part gray-scale of low grey-scale range in described multiple GTG all GTGs that to be described primary colours corresponding;
Data acquisition module, for carrying out data acquisition at least to obtain described multiple GTG multiple brightness measurements corresponding respectively to the color of described multiple GTG;
Adjustment factor computing module, obtains multiple adjustment factors corresponding to described multiple GTG at least utilizing the difference between described multiple brightness measurements multiple brightness target value corresponding with described multiple GTG difference; And
Transmission module on adjustment factor, for described multiple adjustment factor is uploaded to described LED display, changes LED drive current when showing described multiple GTG according to described multiple adjustment factor for described LED display thus realize the correction to described multiple GTG.
9. low gray scale correction system as claimed in claim 8, it is characterized in that, described adjustment factor computing module specifically for: utilize the difference between described multiple brightness measurements and described multiple brightness target value to calculate multiple brightness correction coefficients respectively as described multiple adjustment factor respectively; Or described data acquisition module is specifically for carrying out data acquisition to obtain described multiple GTG many groups bright chroma measured value corresponding respectively to the color of described multiple GTG, and described adjustment factor computing module specifically for: utilize the difference between described many group bright chroma measured values many groups bright chroma desired value corresponding respectively with described multiple GTG to calculate multiple bright chroma correction coefficient respectively as described multiple adjustment factor respectively; Wherein, each bright chroma correction coefficient is a matrix of coefficients.
10. low gray scale correction system as claimed in claim 8, it is characterized in that, described adjustment factor computing module specifically for: utilize the difference between described multiple brightness measurements with described multiple brightness target value to calculate described multiple GTG multiple brightness ratio corresponding respectively respectively, and utilize multiple gamma values of the described multiple GTG of described multiple brightness ratio amendment correspondence respectively to obtain multiple target gamma value as described multiple adjustment factor respectively.
11. low gray scale correction systems as claimed in claim 8, it is characterized in that, described adjustment factor computing module specifically for: utilize the difference between described multiple brightness measurements with described multiple brightness target value to calculate described multiple GTG multiple brightness ratio corresponding respectively respectively, and utilize described multiple brightness ratio to revise the OE width corresponding to bit of binary code corresponding to described multiple GTG to obtain multiple target OE width as described multiple adjustment factor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410538656.9A CN104299565B (en) | 2014-10-13 | 2014-10-13 | The low gray scale correction method and system of LED display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410538656.9A CN104299565B (en) | 2014-10-13 | 2014-10-13 | The low gray scale correction method and system of LED display |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104299565A true CN104299565A (en) | 2015-01-21 |
| CN104299565B CN104299565B (en) | 2017-06-06 |
Family
ID=52319267
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410538656.9A Active CN104299565B (en) | 2014-10-13 | 2014-10-13 | The low gray scale correction method and system of LED display |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104299565B (en) |
Cited By (39)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105185317A (en) * | 2015-10-19 | 2015-12-23 | 西安诺瓦电子科技有限公司 | Led display control card and led display system |
| CN105575367A (en) * | 2016-03-08 | 2016-05-11 | 京东方科技集团股份有限公司 | Display screen brightness adjusting method and system |
| CN105976753A (en) * | 2016-07-15 | 2016-09-28 | 西安诺瓦电子科技有限公司 | Abnormal light point detection and compensation method for correction of LED display device |
| CN106128311A (en) * | 2016-08-26 | 2016-11-16 | 上海锐丽科技股份有限公司 | A kind of seamless spliced screen and bearing calibration thereof |
| CN106128314A (en) * | 2016-08-26 | 2016-11-16 | 上海锐丽科技股份有限公司 | A kind of indoor full-color mosaic screen and bearing calibration thereof |
| CN106128315A (en) * | 2016-08-26 | 2016-11-16 | 上海锐丽科技股份有限公司 | The energy-conservation mosaic screen of LED-backlit of a kind of Intelligent adjustment color and control method thereof |
| WO2017000358A1 (en) * | 2015-07-02 | 2017-01-05 | 武汉华星光电技术有限公司 | Gamma adjusting method and apparatus for liquid crystal display panel |
| CN106409219A (en) * | 2016-06-06 | 2017-02-15 | 深圳市华星光电技术有限公司 | Precompensation method and device for regulating brightness and chroma of panel |
| CN106652961A (en) * | 2017-02-06 | 2017-05-10 | 北京京东方专用显示科技有限公司 | Restoration method and restoration device of polarized liquid crystal display panel |
| CN107068037A (en) * | 2017-05-26 | 2017-08-18 | 武汉天马微电子有限公司 | The gray scale correction method and gray scale correction device of display panel |
| CN107316623A (en) * | 2016-04-26 | 2017-11-03 | 青岛海信电器股份有限公司 | A kind of brightness correcting method and luminance correction device of medical science display device |
| CN107507560A (en) * | 2017-08-21 | 2017-12-22 | 杭州视芯科技有限公司 | Brightness correcting method and system for LED display |
| CN107863075A (en) * | 2017-11-03 | 2018-03-30 | 惠科股份有限公司 | The driving method and drive device of display device |
| CN109253862A (en) * | 2018-08-31 | 2019-01-22 | 武汉精测电子集团股份有限公司 | A kind of colour measurement method neural network based |
| CN110277054A (en) * | 2019-07-23 | 2019-09-24 | 中国科学院长春光学精密机械与物理研究所 | A kind of LED display multi-grey level bearing calibration |
| CN110534071A (en) * | 2019-07-19 | 2019-12-03 | 南京巨鲨显示科技有限公司 | A kind of display color calibration system neural network based and method |
| WO2020029569A1 (en) * | 2018-08-08 | 2020-02-13 | 广州市浩洋电子股份有限公司 | Color led lamp grayscale correction and linear color mixing method |
| CN110890058A (en) * | 2019-12-06 | 2020-03-17 | 长春希达电子技术有限公司 | Point-by-point correction method of transformation coefficient matrix |
| CN111276092A (en) * | 2020-01-21 | 2020-06-12 | 卡莱特（深圳）云科技有限公司 | Optimization parameter determination method and device |
| CN111326099A (en) * | 2018-12-14 | 2020-06-23 | 西安诺瓦星云科技股份有限公司 | Display correction method, device and system, storage medium and display system |
| CN111696475A (en) * | 2019-03-15 | 2020-09-22 | 西安诺瓦电子科技有限公司 | Display control method, device and system, storage medium and display control card |
| CN111754928A (en) * | 2020-07-31 | 2020-10-09 | 卡莱特（深圳）云科技有限公司 | Display screen layered correction method and device |
| CN111862880A (en) * | 2019-04-15 | 2020-10-30 | 西安诺瓦电子科技有限公司 | Method for acquiring multi-color gamma correction table and display control method, device and system |
| CN112599074A (en) * | 2020-05-28 | 2021-04-02 | 西安诺瓦星云科技股份有限公司 | Display module correction method, device and system and display screen correction method and device |
| CN112991233A (en) * | 2021-05-14 | 2021-06-18 | 深圳精智达技术股份有限公司 | Image correction method and device |
| CN113112952A (en) * | 2019-12-24 | 2021-07-13 | 西安诺瓦星云科技股份有限公司 | Display screen color temperature adjusting method, device and system and computer readable storage medium |
| CN113284456A (en) * | 2021-07-21 | 2021-08-20 | 卡莱特云科技股份有限公司 | Method and device for determining correction coefficient of display screen lamp point and computer equipment |
| CN113450703A (en) * | 2020-09-24 | 2021-09-28 | 重庆康佳光电技术研究院有限公司 | Display screen compensation method and device, computer readable storage medium and electronic equipment |
| WO2021196036A1 (en) * | 2020-03-31 | 2021-10-07 | 西安诺瓦星云科技股份有限公司 | System, method and apparatus for image processing |
| CN113516939A (en) * | 2020-03-25 | 2021-10-19 | 杭州海康威视数字技术股份有限公司 | Brightness correction method and device, display equipment, computing equipment and storage medium |
| CN113571010A (en) * | 2021-07-29 | 2021-10-29 | 西安诺瓦星云科技股份有限公司 | Brightness and chrominance information acquisition method, device and system and computer readable storage medium |
| CN113870768A (en) * | 2020-06-30 | 2021-12-31 | 西安诺瓦星云科技股份有限公司 | Display compensation method and device |
| CN114067731A (en) * | 2021-11-27 | 2022-02-18 | 卡莱特云科技股份有限公司 | Low gray scale correction method and device for LED display screen and brightness correction system |
| CN114187865A (en) * | 2021-11-03 | 2022-03-15 | 北京易美新创科技有限公司 | Image processing method and device for LED display screen and control card |
| CN114220368A (en) * | 2021-12-29 | 2022-03-22 | 深圳市华星光电半导体显示技术有限公司 | Brightness adjusting system and brightness adjusting method of display panel |
| CN114464124A (en) * | 2020-10-30 | 2022-05-10 | 西安诺瓦星云科技股份有限公司 | Display device, display method thereof, processor and computer storage medium |
| CN114828337A (en) * | 2022-07-01 | 2022-07-29 | 杭州罗莱迪思科技股份有限公司 | Control method and application of outdoor LED dyeing lamp |
| WO2023015616A1 (en) * | 2021-08-12 | 2023-02-16 | Tcl华星光电技术有限公司 | Backlight module brightness correction method, display apparatus, and brightness correction apparatus |
| CN116686037A (en) * | 2020-10-19 | 2023-09-01 | 西安诺瓦星云科技股份有限公司 | Gray scale measurement method and device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0830231A (en) * | 1994-07-18 | 1996-02-02 | Toshiba Corp | Led dot matrix display device and method for dimming thereof |
| JPH08328511A (en) * | 1995-03-30 | 1996-12-13 | Toshiba Corp | Led display device and display control method therefor |
| CN103327259A (en) * | 2013-07-19 | 2013-09-25 | 西安诺瓦电子科技有限公司 | Parameter adjusting method and device of camera for correcting LED (Light Emitting Diode) display screen |
| CN103400549A (en) * | 2012-09-29 | 2013-11-20 | 西安诺瓦电子科技有限公司 | LED pixel correction coefficient uploading method of LED display screen |
| CN103778887A (en) * | 2013-03-21 | 2014-05-07 | 西安电子科技大学 | Method and device for correcting brightness of LED display device |
-
2014
- 2014-10-13 CN CN201410538656.9A patent/CN104299565B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0830231A (en) * | 1994-07-18 | 1996-02-02 | Toshiba Corp | Led dot matrix display device and method for dimming thereof |
| JPH08328511A (en) * | 1995-03-30 | 1996-12-13 | Toshiba Corp | Led display device and display control method therefor |
| CN103400549A (en) * | 2012-09-29 | 2013-11-20 | 西安诺瓦电子科技有限公司 | LED pixel correction coefficient uploading method of LED display screen |
| CN103778887A (en) * | 2013-03-21 | 2014-05-07 | 西安电子科技大学 | Method and device for correcting brightness of LED display device |
| CN103327259A (en) * | 2013-07-19 | 2013-09-25 | 西安诺瓦电子科技有限公司 | Parameter adjusting method and device of camera for correcting LED (Light Emitting Diode) display screen |
Cited By (52)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017000358A1 (en) * | 2015-07-02 | 2017-01-05 | 武汉华星光电技术有限公司 | Gamma adjusting method and apparatus for liquid crystal display panel |
| CN105185317A (en) * | 2015-10-19 | 2015-12-23 | 西安诺瓦电子科技有限公司 | Led display control card and led display system |
| CN105185317B (en) * | 2015-10-19 | 2017-10-17 | 西安诺瓦电子科技有限公司 | LED display control cards and LED display system |
| CN105575367A (en) * | 2016-03-08 | 2016-05-11 | 京东方科技集团股份有限公司 | Display screen brightness adjusting method and system |
| CN107316623A (en) * | 2016-04-26 | 2017-11-03 | 青岛海信电器股份有限公司 | A kind of brightness correcting method and luminance correction device of medical science display device |
| CN106409219B (en) * | 2016-06-06 | 2019-07-02 | 深圳市华星光电技术有限公司 | Adjust the precompensation method and device of panel luminance and coloration |
| CN106409219A (en) * | 2016-06-06 | 2017-02-15 | 深圳市华星光电技术有限公司 | Precompensation method and device for regulating brightness and chroma of panel |
| CN105976753A (en) * | 2016-07-15 | 2016-09-28 | 西安诺瓦电子科技有限公司 | Abnormal light point detection and compensation method for correction of LED display device |
| CN105976753B (en) * | 2016-07-15 | 2019-01-29 | 西安诺瓦电子科技有限公司 | Abnormal lamp point in LED display correction detects compensation method |
| CN106128315A (en) * | 2016-08-26 | 2016-11-16 | 上海锐丽科技股份有限公司 | The energy-conservation mosaic screen of LED-backlit of a kind of Intelligent adjustment color and control method thereof |
| CN106128314A (en) * | 2016-08-26 | 2016-11-16 | 上海锐丽科技股份有限公司 | A kind of indoor full-color mosaic screen and bearing calibration thereof |
| CN106128311A (en) * | 2016-08-26 | 2016-11-16 | 上海锐丽科技股份有限公司 | A kind of seamless spliced screen and bearing calibration thereof |
| CN106652961B (en) * | 2017-02-06 | 2018-11-13 | 北京京东方专用显示科技有限公司 | The restorative procedure and prosthetic device of a kind of liquid crystal display panel after polarization |
| CN106652961A (en) * | 2017-02-06 | 2017-05-10 | 北京京东方专用显示科技有限公司 | Restoration method and restoration device of polarized liquid crystal display panel |
| CN107068037A (en) * | 2017-05-26 | 2017-08-18 | 武汉天马微电子有限公司 | The gray scale correction method and gray scale correction device of display panel |
| CN107068037B (en) * | 2017-05-26 | 2020-05-15 | 武汉天马微电子有限公司 | Gray scale correction method and gray scale correction device of display panel |
| CN107507560A (en) * | 2017-08-21 | 2017-12-22 | 杭州视芯科技有限公司 | Brightness correcting method and system for LED display |
| CN107863075A (en) * | 2017-11-03 | 2018-03-30 | 惠科股份有限公司 | The driving method and drive device of display device |
| WO2019085346A1 (en) * | 2017-11-03 | 2019-05-09 | 惠科股份有限公司 | Method and device for driving display device |
| US11195445B2 (en) | 2017-11-03 | 2021-12-07 | HKC Corporation Limited | Driving apparatus and driving method of a display apparatus |
| WO2020029569A1 (en) * | 2018-08-08 | 2020-02-13 | 广州市浩洋电子股份有限公司 | Color led lamp grayscale correction and linear color mixing method |
| CN109253862A (en) * | 2018-08-31 | 2019-01-22 | 武汉精测电子集团股份有限公司 | A kind of colour measurement method neural network based |
| CN111326099A (en) * | 2018-12-14 | 2020-06-23 | 西安诺瓦星云科技股份有限公司 | Display correction method, device and system, storage medium and display system |
| CN111326099B (en) * | 2018-12-14 | 2021-10-01 | 西安诺瓦星云科技股份有限公司 | Display correction method, device and system, storage medium and display system |
| CN111696475A (en) * | 2019-03-15 | 2020-09-22 | 西安诺瓦电子科技有限公司 | Display control method, device and system, storage medium and display control card |
| CN111862880A (en) * | 2019-04-15 | 2020-10-30 | 西安诺瓦电子科技有限公司 | Method for acquiring multi-color gamma correction table and display control method, device and system |
| CN111862880B (en) * | 2019-04-15 | 2021-11-16 | 西安诺瓦星云科技股份有限公司 | Method for acquiring multi-color gamma correction table and display control method, device and system |
| CN110534071A (en) * | 2019-07-19 | 2019-12-03 | 南京巨鲨显示科技有限公司 | A kind of display color calibration system neural network based and method |
| CN110277054A (en) * | 2019-07-23 | 2019-09-24 | 中国科学院长春光学精密机械与物理研究所 | A kind of LED display multi-grey level bearing calibration |
| CN110890058A (en) * | 2019-12-06 | 2020-03-17 | 长春希达电子技术有限公司 | Point-by-point correction method of transformation coefficient matrix |
| CN113112952A (en) * | 2019-12-24 | 2021-07-13 | 西安诺瓦星云科技股份有限公司 | Display screen color temperature adjusting method, device and system and computer readable storage medium |
| CN111276092A (en) * | 2020-01-21 | 2020-06-12 | 卡莱特（深圳）云科技有限公司 | Optimization parameter determination method and device |
| CN113516939A (en) * | 2020-03-25 | 2021-10-19 | 杭州海康威视数字技术股份有限公司 | Brightness correction method and device, display equipment, computing equipment and storage medium |
| CN113516939B (en) * | 2020-03-25 | 2022-08-26 | 杭州海康威视数字技术股份有限公司 | Brightness correction method and device, display equipment, computing equipment and storage medium |
| WO2021196036A1 (en) * | 2020-03-31 | 2021-10-07 | 西安诺瓦星云科技股份有限公司 | System, method and apparatus for image processing |
| CN112599074A (en) * | 2020-05-28 | 2021-04-02 | 西安诺瓦星云科技股份有限公司 | Display module correction method, device and system and display screen correction method and device |
| CN113870768A (en) * | 2020-06-30 | 2021-12-31 | 西安诺瓦星云科技股份有限公司 | Display compensation method and device |
| CN113870768B (en) * | 2020-06-30 | 2023-09-12 | 西安诺瓦星云科技股份有限公司 | Display compensation method and device |
| CN111754928A (en) * | 2020-07-31 | 2020-10-09 | 卡莱特（深圳）云科技有限公司 | Display screen layered correction method and device |
| CN113450703A (en) * | 2020-09-24 | 2021-09-28 | 重庆康佳光电技术研究院有限公司 | Display screen compensation method and device, computer readable storage medium and electronic equipment |
| CN116686037A (en) * | 2020-10-19 | 2023-09-01 | 西安诺瓦星云科技股份有限公司 | Gray scale measurement method and device |
| CN114464124A (en) * | 2020-10-30 | 2022-05-10 | 西安诺瓦星云科技股份有限公司 | Display device, display method thereof, processor and computer storage medium |
| CN112991233A (en) * | 2021-05-14 | 2021-06-18 | 深圳精智达技术股份有限公司 | Image correction method and device |
| CN112991233B (en) * | 2021-05-14 | 2021-07-27 | 深圳精智达技术股份有限公司 | Image correction method and device |
| CN113284456A (en) * | 2021-07-21 | 2021-08-20 | 卡莱特云科技股份有限公司 | Method and device for determining correction coefficient of display screen lamp point and computer equipment |
| CN113571010A (en) * | 2021-07-29 | 2021-10-29 | 西安诺瓦星云科技股份有限公司 | Brightness and chrominance information acquisition method, device and system and computer readable storage medium |
| WO2023015616A1 (en) * | 2021-08-12 | 2023-02-16 | Tcl华星光电技术有限公司 | Backlight module brightness correction method, display apparatus, and brightness correction apparatus |
| CN114187865A (en) * | 2021-11-03 | 2022-03-15 | 北京易美新创科技有限公司 | Image processing method and device for LED display screen and control card |
| CN114067731A (en) * | 2021-11-27 | 2022-02-18 | 卡莱特云科技股份有限公司 | Low gray scale correction method and device for LED display screen and brightness correction system |
| CN114220368A (en) * | 2021-12-29 | 2022-03-22 | 深圳市华星光电半导体显示技术有限公司 | Brightness adjusting system and brightness adjusting method of display panel |
| CN114828337A (en) * | 2022-07-01 | 2022-07-29 | 杭州罗莱迪思科技股份有限公司 | Control method and application of outdoor LED dyeing lamp |
| CN114828337B (en) * | 2022-07-01 | 2022-09-27 | 杭州罗莱迪思科技股份有限公司 | Control method and application of outdoor LED dyeing lamp |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104299565B (en) | 2017-06-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104299565A (en) | Low grey scale correction method and system of LED display device | |
| CN111968570B (en) | Display compensation information acquisition method, display compensation method and device | |
| CN104299568B (en) | The image display control method of a kind of WOLED display device and device, display device | |
| CN107818766B (en) | Integrated circuit for driving display panel and method thereof | |
| CN103680413B (en) | Image processing device and image processing method | |
| CN104485068A (en) | Luminance-chrominance correction method and system of LED (Light Emitting Diode) display screen | |
| CN103310765B (en) | Backlight illumination compensation method and display device | |
| CN109074775B (en) | Digital image processing chain and processing block and display comprising same | |
| CN104464623B (en) | A kind of method and device for adjusting the low GTG of light emitting diode | |
| CN103391412B (en) | The method for displaying image of a kind of light-source brightness Automatic adjusument and device | |
| CN110491330B (en) | Gamma adjusting method and device and display device | |
| KR20060024001A (en) | Transforming three color input signals to more color signals | |
| CN103489405A (en) | Method, device and system for compensating displaying | |
| CN109637441B (en) | Module Gamma correction method based on Kalman filtering | |
| CN110634437B (en) | Gamma curve acquisition method and device for multi-segment display brightness and display equipment | |
| CN109767722B (en) | OLED module Gamma adjusting method and device | |
| CN111862880B (en) | Method for acquiring multi-color gamma correction table and display control method, device and system | |
| CN105528990A (en) | LED display screen uniformity correction method | |
| CN102542988B (en) | Device and method for previewing light-emitting diode (LED) display screen revising effect | |
| CN110796990B (en) | Apparatus and method for controlling color gamut | |
| CN103325351A (en) | Image processing apparatus and image processing method | |
| CN110277054A (en) | A kind of LED display multi-grey level bearing calibration | |
| CN104464685A (en) | Method and device for adjusting gray level transition and color of display device | |
| JP2011107703A (en) | Method and device for managing color | |
| CN108831381A (en) | Show data alignment system and display data adjustment method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 710075 DEF101, Zero One Square, Xi'an Software Park, No. 72 Zhangbajie Science and Technology Second Road, Xi'an High-tech Zone, Shaanxi Province Patentee after: XI'AN NOVASTAR TECH Co.,Ltd. Address before: 710075 Qinfengge D District 401, Xi'an Software Park, 68 Science and Technology Second Road, Xi'an High-tech Zone, Shaanxi Province Patentee before: Xi'an NovaStar Tech Co.,Ltd. |
|
| CP03 | Change of name, title or address |