CN111862880B - Method for acquiring multi-color gamma correction table and display control method, device and system - Google Patents
Method for acquiring multi-color gamma correction table and display control method, device and system Download PDFInfo
- Publication number
- CN111862880B CN111862880B CN201910300496.7A CN201910300496A CN111862880B CN 111862880 B CN111862880 B CN 111862880B CN 201910300496 A CN201910300496 A CN 201910300496A CN 111862880 B CN111862880 B CN 111862880B
- Authority
- CN
- China
- Prior art keywords
- color
- data
- bits
- value
- gamma
- 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.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
- G09G2320/0276—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0666—Adjustment of display parameters for control of colour parameters, e.g. colour temperature
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0673—Adjustment of display parameters for control of gamma adjustment, e.g. selecting another gamma curve
Abstract
The embodiment of the invention provides a method for acquiring a multi-color gamma correction table, a display control method, a display control device and a display control system, wherein the method for acquiring the multi-color gamma correction table comprises the following steps: obtaining 2 of each color of a plurality of colors displayed by a target display screenNEach gray scale value corresponds to 2NMeasuring the brightness value to obtain a relation table of the gray value and the measured brightness value of each color; 2 to be respectively characterized by M bitsMGamma mapping of gray-scale values into 2 respectively characterized by N bitsMObtaining a first gamma correction table corresponding to the first color according to the target gray-scale value; acquiring the brightness ratio of a plurality of colors under a target color temperature value; and obtaining a second gamma correction table corresponding to the second color based on the first gamma correction table, the relation table of the gray-scale value of the first color and the measured brightness value, the brightness ratio value and the relation table of the gray-scale value of the second color and the measured brightness value. The embodiment of the invention can solve the problem of color cast of low-gray display of the display screen.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a method for acquiring a multi-color gamma correction table, a display control method, a display control device, and a display control system.
Background
Nowadays, the display of the LED display screen tends to be standardized, and customers have higher requirements on the gray display performance and the gray color temperature expression accuracy of the LED display screen. However, for the current LED display screen, due to the fine display of the low gray portion of the LED display screen, the precision of the low gray value is required to have a higher small value expression performance for the driving chip driving the LED lamp panel, that is, the luminance when the input driving chip gray value is 65535 should be 65535 times the luminance when the input driving chip gray value is 1. However, the driving chip for actually driving the LED lamp panel is a constant current driving chip, and the driving chip realizes different brightness through PWM pulse width modulation, that is, through different on-time control under the same current value, and when the gray value of the input driving chip is 1, the driving chip controls the width of the LED lamp on unit 1, so that the LED lamp emits light. However, because the conduction time of the conduction unit 1 is too short, at this time, the PN junction of the LED lamp which is not conducted is equivalent to a capacitor, which hinders the LED lamp from emitting light with a luminance of 1 unit width, and finally, the luminance of the LED lamp does not accurately display the luminance value corresponding to 1 unit width. As shown in fig. 1, when pure white display is performed, the difference between the brightnesses (RBrightness, GBrightness, and BBrightness) of different colors in the low gray portion is large, which causes color temperature deviation and color cast. In addition, when the LED display screen is subjected to EMC (electromagnetic compatibility) test, the frequency points are too concentrated and are higher than ClassA (electromagnetic compatibility test standard) and ClassB (electromagnetic compatibility test standard).
Disclosure of Invention
Therefore, the embodiment of the invention provides a method for acquiring a multi-color gamma correction table, a display control method, a display control device and a display control system, so as to solve the problem of color cast of low-gray display of a display screen.
Specifically, an embodiment of the present invention provides a method for acquiring a multi-color gamma correction table, including: obtaining 2 of each color of a plurality of colors displayed by a target display screenNEach gray scale value corresponds to 2NMeasuring brightness value to obtain the relationship table of gray level value and measured brightness value of each color, wherein 2NThe gray-scale values are respectively characterized by N bits, and the colors comprise a first color and a second color; 2 to be respectively characterized by M bitsMGamma mapping of gray-scale values into 2 respectively characterized by N bitsMA target gray-scale value to obtain a first gamma correction table corresponding to the first color, wherein M, N is a positive integer and M is<N; acquiring the brightness ratio values of the multiple colors under the target color temperature value; and obtaining a second gamma correction table corresponding to the second color based on the first gamma correction table, the relationship table of the gray-scale value and the measured brightness value of the first color, the brightness ratio value and the relationship table of the gray-scale value and the measured brightness value of the second color.
In one embodiment of the inventionThe obtaining a second gamma correction table corresponding to the second color based on the first gamma correction table, the relationship table between the gray scale value of the first color and the measured brightness value, the brightness ratio value, and the relationship table between the gray scale value of the second color and the measured brightness value includes: obtaining 2 characterized by M bits based on the first gamma correction table and the relationship table of the gray scale value and the measured brightness value of the first colorMEach gray scale value corresponds to 2MA first color measurement brightness value; based on the 2MThe first color measurement brightness value and the brightness ratio value are obtained to be 2MCalculating a brightness value for each second color; based on the 2MThe second color calculation brightness value inquires the relationship table of the gray scale value and the measurement brightness value of the second color to obtain 2MA second color target gray scale value characterized by N bits; and based on said 2 characterized by M bitsMA gray scale value and said 2MAnd the second color target gray-scale values are represented by N bits to form the second gamma correction table corresponding to the second color.
In one embodiment of the invention, the plurality of colors further comprises a third color; the method for acquiring the multi-color gamma correction table further comprises the following steps: obtaining a third gamma correction table corresponding to the third color based on the first gamma correction table, the relationship table of the gray scale value and the measured brightness value of the first color, the brightness ratio value and the relationship table of the gray scale value and the measured brightness value of the third color; wherein the first color, the second color, and the third color are different from each other and are each one of red, green, and blue.
In one embodiment of the present invention, N-16 and M-8 are used.
Secondly, an embodiment of the present invention provides a display control method, including: receiving input image data, wherein each pixel data in the input image data contains a plurality of color data respectively characterized by M bits; performing correction processing on the plurality of color data of each of the pixel data to obtain a plurality of target color data characterized by N bits corresponding to each of the pixel data, wherein the correction processing includes: gamma mapping the plurality of color data of each of the pixel data based on a plurality of gamma correction tables different from each other, M, N being a positive integer and M < N; and controlling a target display screen to display an image according to the plurality of target color data represented by N bits corresponding to each of the pixel data.
In one embodiment of the present invention, the correction process further includes: and performing brightness and chrominance correction on the plurality of color data of each pixel data after the gamma mapping.
In an embodiment of the present invention, the display control method further includes: and generating and outputting a plurality of enable signals respectively corresponding to the plurality of target color data of each of the pixel data, wherein phases of the plurality of enable signals are staggered from each other.
An embodiment of the present invention provides a display control apparatus, including: a receiving module, configured to receive input image data, wherein each pixel data in the input image data contains a plurality of color data respectively characterized by M bits; a correction module, configured to perform correction processing on the multiple color data of each pixel data to obtain multiple target color data corresponding to each pixel data and characterized by N bits, where the correction module includes a gamma mapping unit, configured to perform gamma mapping on the multiple color data of each pixel data according to multiple different gamma correction tables, M, N is a positive integer and M < N; and the output control module is used for controlling a target display screen to display images according to the target color data which correspond to each pixel data and are represented by N bits.
In one embodiment of the present invention, the correction module further comprises: and a brightness and chrominance correction unit for performing brightness and chrominance correction on the plurality of color data of each pixel data after the gamma mapping.
In one embodiment of the present invention, the output control module is further configured to: and generating and outputting a plurality of enable signals respectively corresponding to the plurality of target color data of each of the pixel data, wherein phases of the plurality of enable signals are staggered from each other.
In addition, an embodiment of the present invention provides a display control apparatus, including: a programmable logic device for performing the display control method according to any one of the preceding claims.
Finally, an embodiment of the present invention provides a display control system, including: sending the card; the scanning card is connected with the sending card; the LED display screen is connected with the scanning card; the scanning card is used for receiving input image data from the sending card, each pixel data in the input image data comprises a plurality of color data respectively characterized by M bits, the plurality of color data of each pixel data are corrected to obtain a plurality of target color data corresponding to each pixel data and characterized by N bits, and the LED display screen is controlled to display images according to the plurality of target color data corresponding to each pixel data and characterized by N bits; wherein the correction processing includes: gamma mapping the plurality of color data of each of the pixel data based on a plurality of gamma correction tables different from each other, M, N being a positive integer and M < N.
In one embodiment of the present invention, the correction process further includes: and performing brightness and chrominance correction on the plurality of color data of each pixel data after the gamma mapping.
In one embodiment of the present invention, the scan card is further configured to: and generating and outputting a plurality of enable signals respectively corresponding to the plurality of target color data of each of the pixel data, wherein phases of the plurality of enable signals are staggered from each other.
As can be seen from the above, the embodiments of the present invention can achieve one or more of the following advantages: the display control method provided by the embodiment of the invention can realize independent gamma mapping on a plurality of color data of each pixel data, ensure the independence of a plurality of color data calculations of each pixel data and ensure the normal display of the color temperature of the white full gray section; in addition, a plurality of enabling signals respectively corresponding to a plurality of color data of each pixel data are arranged, wherein the phases of the enabling signals are staggered, so that different color data are turned on for display at different time intervals, the mutual influence relation among the color data is optimized, the gray scale display problem caused by current fluctuation of an LED lamp panel is solved, and the low gray scale color cast problem can be solved by independently adjusting the enabling signals of LED lamps with certain colors; the embodiment of the invention solves the problem of color cast of low-gray display caused by inaccurate expression of a plurality of color data of low-gray display of the display screen, optimizes the phenomenon that EMC frequency points of the display screen are concentrated and the frequency points are higher than ClassA and ClassB, and ensures that the color management of the display screen is more scientific and normative.
Other aspects and features of the present invention will become apparent from the following detailed description, which proceeds with reference to the accompanying drawings. It is to be understood, however, that the drawings are designed solely for purposes of illustration and not as a definition of the limits of the invention. It should be further understood that the drawings are not necessarily drawn to scale and that, unless otherwise indicated, they are merely intended to conceptually illustrate the structures and procedures described herein.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a graph of brightness curves of different colors in a pure white display according to the prior art;
FIG. 2 is a flowchart illustrating a method for obtaining a multi-color gamma correction table according to a first embodiment of the present invention;
fig. 3 is a flowchart of step S14 in the method for obtaining a multi-color gamma correction table according to the first embodiment of the present invention;
FIG. 4 is a flowchart illustrating other steps in the method for obtaining a multi-color gamma correction table according to the first embodiment of the invention;
FIG. 5 is a diagram illustrating a mapping relationship between a target gray-scale value and a gray-scale value in the method for obtaining a multi-color gamma correction table according to the first embodiment of the present invention;
fig. 6 is a flowchart of a display control method according to a second embodiment of the invention;
FIG. 7 is a flowchart illustrating a display control method according to a second embodiment of the present invention;
fig. 8 is a schematic structural diagram illustrating a specific implementation of a display control method according to a second embodiment of the present invention;
fig. 9 is a schematic diagram of an enable signal pin reserved in an LED lamp panel in the display control method according to the second embodiment of the present invention;
FIG. 10 is a timing diagram of an enable signal in a display control method according to a second embodiment of the present invention;
fig. 11 is a schematic structural diagram of a display control apparatus according to a third embodiment of the present invention;
fig. 12 is a schematic structural diagram of a middle correction module 33 of a display control apparatus according to a third embodiment of the present invention;
fig. 13 is a schematic structural diagram of a display control apparatus according to a fourth embodiment of the present invention; and
fig. 14 is a schematic structural diagram of a display control system according to a fifth embodiment of the present invention.
[ brief description of the drawings ]
S11-S15, S141-S144: a method step of obtaining a multi-color gamma correction table;
S21-S24: a display control method;
30: a display control device; 31: a receiving module; 33: a correction module; 35: an output control module; 331: a gamma mapping unit; 333: a brightness and chrominance correction unit;
40: a display control device; 41: a programmable logic device;
50: a display control system; 51: sending the card; 52: scanning the card; 53: and an LED display screen.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The invention will be described in connection with embodiments with reference to the drawings.
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not a whole embodiment. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the invention described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It should be noted that the division of the embodiments of the present invention is only for convenience of description and should not be construed as a limitation, and features of various embodiments may be combined and referred to each other without contradiction.
[ first embodiment ] A method for manufacturing a semiconductor device
Referring to fig. 2, a first embodiment of the present invention provides a method for acquiring a multi-color gamma correction table. As shown in fig. 2, the multi-color gamma correction table acquisition method includes, for example, steps S11 to S14.
Step S11: obtaining 2 of each color of a plurality of colors displayed by a target display screenNEach gray scale value corresponds to 2NMeasuring brightness value to obtain the relationship table of gray level value and measured brightness value of each color, wherein 2NThe gray-scale values are respectively characterized by N bits, and the colors comprise a first color and a second color;
step S12: 2 to be respectively characterized by M bitsMGamma mapping of gray-scale values into 2 respectively characterized by N bitsMA target gray-scale value to obtain a first gamma correction table corresponding to the first color, wherein M, N is a positive integer and M is<N；
Step S13: acquiring the brightness ratio values of the multiple colors under the target color temperature value; and
step S14: and obtaining a second gamma correction table corresponding to the second color based on the first gamma correction table, the relationship table of the gray scale value and the measured brightness value of the first color, the brightness ratio value and the relationship table of the gray scale value and the measured brightness value of the second color.
Further, as shown in fig. 3, step S14 includes, for example, step S141 to step S144.
Step S141: obtaining 2 characterized by M bits based on the first gamma correction table and the relationship table of the gray scale value and the measured brightness value of the first colorMEach gray scale value corresponds to 2MA first color measurement brightness value;
step S142: based on the 2MThe first color measurement brightness value and the brightness ratio value are obtained to be 2MCalculating a brightness value for each second color;
step S143: based on the 2MThe second color calculation brightness value inquires the relationship table of the gray scale value and the measurement brightness value of the second color to obtain 2MA second color target gray scale value characterized by N bits; and
step S144: based on said 2 characterized by M bitsMA gray scale value and said 2MAnd the second color target gray-scale values are represented by N bits to form the second gamma correction table corresponding to the second color.
Further, the plurality of colors mentioned includes, for example, a third color. As shown in fig. 4, the method for acquiring a multi-color gamma correction table provided in this embodiment further includes step S15, for example.
Step S15: and obtaining a third gamma correction table corresponding to the third color based on the first gamma correction table, the relationship table of the gray scale value and the measured brightness value of the first color, the brightness ratio value and the relationship table of the gray scale value and the measured brightness value of the third color.
Specifically, the aforementioned target display screen is, for example, an LED display screen, and includes a plurality of LED lamp panels. The aforementioned plurality of colors includes, for example, three colors: red, green and blue. The aforementioned first color, second color and third color are different from each other and are each one of red, green and blue. The aforementioned N is, for example, 16, and the aforementioned M is, for example, 8.
For a better understanding of the present embodiment, a brief description of the specific embodiments of the present embodiment follows.
Firstly, a light sensing device (not limited to a colorimeter/illuminometer/luminance meter/camera) collects the luminous intensity, namely the measured luminance value, corresponding to the gray scale value from 0 to 65535, represented by 16 bits, of a target display screen in a plurality of colors, such as red (R), green (G) and blue (B), and each gray scale value in each color, for example, the gray scale value represented by 16 bits, and software stores the obtained relationship table between the gray scale value represented by 16 bits of each color and the measured luminance value. For example, the relationship table between the gray scale value of the green 16-bit representation and the measured brightness value is shown in table 1, wherein the gray scale value of the green 16-bit representation ranges from 0 to 65535, and the measured brightness value is L correspondinglyG0To LG65535。
TABLE 1 Green 16-bit characterization grayscale value vs. measured luminance value Table
| Gray scale value | Measuring brightness values |
| 0 | LG0 |
| 1 | LG1 |
| 2 | LG2 |
| 3 | LG3 |
| 4 | LG4 |
| 5 | LG5 |
| 6 | LG6 |
| 7 | LG7 |
| 8 | LG8 |
| 9 | LG9 |
| 10 | LG10 |
| 11 | LG11 |
| 12 | LG12 |
| … | … |
| 65535 | LG65535 |
Then, a certain color is selected from the three colors R/G/B as a reference, for example, green is selected as a reference, and 256 gray-scale values represented by 8 bits are gamma-mapped to 256 target gray-scale values represented by 16 bits, so as to obtain a gamma correction table corresponding to green.
Specifically, referring to equation (1), the target gray level value of the 16-bit characterization is denoted by "gamma value", and the gray level value of the 8-bit characterization is denoted by "SourceGrayData". Wherein, gamma represents the gamma value in the LED industry, the general gamma value in the LCD field is 2.2, and the general gamma value in the LED field is 2.8.
65535*(SourceGrayData/255)γ＝GammaValue (1)
The mapping relationship between SourceGrayData and gamma value can be obtained according to formula (1) and is shown in fig. 5.
As shown in fig. 5, the abscissa of the curve represents SourceGrayData, and the ordinate represents gamma value, wherein the value range of SourceGrayData is 0 to 255, and the value range of gamma value is 0 to 65535. Since the value of γ is greater than 1, the gamma values obtained by substituting 0, 1, 2, and 3 for SourceGrayData and 2.8 for γ into equation (1) are less than 0.5, and rounded to 0. When SourceGrayData is 4, gamma value is 1. The Gamma value corresponding to other SourceGrayData can be calculated in the same way. The gamma correction table for the calculated green color is shown in table 2.
TABLE 2 Gamma correction Table for Green
| | GammaValue | |
| 0 | 0 | |
| 1 | 0 | |
| 2 | 0 | |
| 3 | 0 | |
| 4 | 1 | |
| 5 | 1 | |
| 6 | 2 | |
| 7 | 3 | |
| 8 | 4 | |
| 9 | 6 | |
| 10 | 8 | |
| 11 | 10 | |
| 12 | 13 | |
| … | … | |
| 255 | 65535 |
Next, the luminance ratio values of red, green, and blue at the target color temperature values are obtained. For example, the target color temperature value is 6500K, and the ratio of the red, green and blue luminances is R: 75%, G: 63%, B: 56 percent.
And then, obtaining a gamma correction table corresponding to the red color based on the obtained green gamma correction table, a green 16-bit represented gray-scale value and measured brightness value relation table, a brightness ratio value and a red 16-bit represented gray-scale value and measured brightness value relation table.
Specifically, based on the relationship table between the gray-scale value and the measured brightness value of the green 16-bit characterization shown in table 1 and the gamma correction table of the green shown in table 2, 256 measured brightness values corresponding to the 256 gray-scale values of the green 8-bit characterization can be obtained, see table 3.
TABLE 3 Green 8-bit characterization of gray scale values versus measured brightness values
Based on the measured luminance values of 256 greens and the luminance ratio values R of red, green and blue in table 3: 75%, G: 63%, B: 56%, 256 calculated brightness values for red can be calculated. Specifically, the calculation of the brightness ratio and the measured brightness value to obtain the calculated brightness values of other colors is performed by referring to the existing calculation formula in the prior art, and is not described herein again.
By looking up the relationship table of gray-scale values of 16-bit characterization of red and measured luminance values as shown in table 4 based on the calculated luminance values of 256 reds, 256 target gray-scale values of red characterized by 16 bits can be obtained. For example, whenFrom the green brightness measurement LG0The calculated brightness value of red is LRWhen is in accordance with LRIn Table 4, the results are summarized with LRThe same or similar measured brightness values, e.g. L found via look-up table 4R3And LRAnd if so, the corresponding red target gray scale value of the 16-bit representation is 3.
TABLE 4 relationship table of gray scale values and measured brightness values for red 16-bit characterization
| Gray scale value | Measuring brightness values |
| 0 | LR0 |
| 1 | LR1 |
| 2 | LR2 |
| 3 | LR3 |
| 4 | LR4 |
| 5 | LR5 |
| 6 | LR6 |
| 7 | LR7 |
| 8 | LR8 |
| 9 | LR9 |
| 10 | LR10 |
| 11 | LR11 |
| 12 | LR12 |
| … | … |
| 65535 | LR65535 |
Based on 256 gray-scale values characterized by 8 bits and 256 target gray-scale values of red characterized by 16 bits, a gamma correction table corresponding to red is formed. For example, in the above steps, the brightness measurement value L of green is used as the referenceG0The calculated brightness value of red is LRWhen is in accordance with LRQuery L in Table 4R3And LRAnd if so, the corresponding red target gray scale value of the 16-bit representation is 3. A 16-bit representation of the red target grayscale value 3 corresponds to a 8-bit representation of the grayscale value 0. Similarly, 256 gray-scale values represented by 8 bits can be obtained, and the red target gray-scale values represented by 16 bits respectively correspond to the 256 gray-scale values represented by 8 bits, so that a gamma correction table corresponding to red can be formed.
The gamma correction table corresponding to blue has the same acquisition method as the gamma correction table corresponding to red, and reference may be made to the aforementioned step of acquiring the gamma correction table corresponding to red, which is not described herein again for brevity.
In summary, the method for obtaining a multi-color gamma correction table according to the first embodiment of the present invention can implement independent gamma mapping on a plurality of color data of each pixel data, ensure the independence of the plurality of color data calculations of each pixel data, and ensure the normal display of the color temperature of the white full gray segment; the problem of the display screen low grey shows that a plurality of color data express inaccurately and lead to low grey to show the color cast is solved, optimized the display screen EMC frequency point and concentrated, and the frequency point is higher than the phenomenon of ClassA and ClassB, let the color management of display screen scientific and standard more.
[ second embodiment ]
Referring to fig. 6, a second embodiment of the present invention provides a display control method. As shown in fig. 6, the display control method includes, for example, steps S21 to S23.
Step S21: receiving input image data, wherein each pixel data in the input image data contains a plurality of color data respectively characterized by M bits;
step S22: performing correction processing on the plurality of color data of each of the pixel data to obtain a plurality of target color data characterized by N bits corresponding to each of the pixel data, wherein the correction processing includes: gamma mapping the plurality of color data of each of the pixel data based on a plurality of gamma correction tables different from each other, M, N being a positive integer and M < N; and
step S23: and controlling a target display screen to display an image according to the plurality of target color data which are characterized by N bits and correspond to each pixel data.
Specifically, the aforementioned input image data, such as R/G/B image data, each pixel data includes red data, green data, and blue data, and the aforementioned M-bit characterization is, for example, an 8-bit characterization, i.e., the gray scale value of the 8-bit characterization of each color data of each pixel data ranges from 0 to 255. The plurality of target color data of N-bit characterization mentioned is, for example, red data, green data, and blue data of 16-bit characterization.
The gamma correction table mentioned in step S22 is, for example, the gamma correction table obtained by the method described in the first embodiment, and for a specific description of the method for obtaining the gamma correction table, reference may be made to the first embodiment, which is not described herein again for brevity.
The gamma mapping method includes performing gamma mapping on a plurality of color data of each pixel data based on a gamma correction table, specifically, taking red data as an example, inquiring a corresponding 16-bit represented target gray-scale value from a gamma correction table corresponding to the red based on a gray-scale value represented by 8 bits of the red data in the pixel data, and performing gamma mapping on the red data.
Further, the mentioned correction processing, for example, further includes: and performing brightness and chrominance correction on the plurality of color data of each pixel data after the gamma mapping. In particular, with reference to equation (2),
a matrix of luminance-chrominance correction coefficients is represented,
and representing each pixel data R/G/B data, wherein the calculation result obtained by the formula is the pixel data after brightness and chrominance correction.
Further, as shown in fig. 7, the display control method provided in this embodiment further includes step S24, for example.
Step S24: and generating and outputting a plurality of enable signals respectively corresponding to the plurality of target color data of each of the pixel data, wherein phases of the plurality of enable signals are staggered from each other.
The mentioned enable signal is, for example, Gclk/OE.
For a better understanding of the present embodiment, a brief description of the specific embodiments of the present embodiment follows.
The display control method provided in this embodiment is implemented on a scan card, which is also called a receiving card, for example, and specifically can be implemented on a Programmable logic device inside the scan card, such as an FPGA (Field-Programmable Gate Array).
As shown in fig. 8, the scan card stores in advance the gamma correction tables obtained by the multi-color gamma correction Table obtaining method according to the first embodiment, such as RGamma Table DpRam 8 × 512_16 × 256, and RGamma Table DpRam 8 × 512_16 _ 256, and when the FPGA receives the input image data gray datar [ 7: 0]、GrayDataG[7：0]And GrayDataB [ 7: 0]Firstly, according to the RGB data of each pixel data of the input image data, performing gamma mapping by looking up a gamma correction table stored in a Dual Port RAM (Dual Port RAM) called inside the FPGA to obtain gamma mapped image data gamma data r [15:0]、GammaDataG[15：0]And gamma datab [15:0]Then, luminance and chrominance correction is performed on the gamma-mapped image data. Wherein the luminance-chrominance correction coefficient matrix is, for example
The image data after luminance and chrominance correction is CoeDataR [15:0 ]]、CoeDataG[15:0]And CoeDataB [15:0 ]]The FPGA internal Control Output module splits the image data into red image data CoeDataR, green image data CoeDataG and blue data CoeDataB, and outputs the red image data CoeDataR, the green image data CoeDataG and the blue image data CoeDataB to the LED lamp panel for driving and displaying.
The driving of the LED lamp panel can be divided into a PWM type and an OnOff type, and the difference of the two driving types is that the control time sequence output by the scanning card is different. The PWM type drive is finally output to the drive chip, and the interior of the drive chip performs gray scale display in a counting mode in a Gclk clock mode. The OnOff type drive controls the LED drive display with OE high and low. As shown in fig. 8, the red image data corresponding enable signal GCLK _ R/OE _ R, the green image data corresponding enable signal GCLK _ G/OE _ G, and the blue data corresponding enable signal GCLK _ B/OE _ B are respectively transmitted to the column driving chip for the red LED lamp, the column driving chip for the green LED lamp, and the column driving chip for the blue LED lamp on the LED lamp panel. Specifically, for the column driver chip on the LED lamp panel being an OnOff driver chip, see fig. 9 for reserved interfaces OE _ RED, OE _ GREEN and OE _ BLUE designed on the LED lamp panel. When the column driving chip on the LED lamp panel is a PWM type driving chip, the enable signal corresponding to the red image data, the enable signal corresponding to the green image data, and the enable signal corresponding to the blue image data are GckR, GckG, and GckB, respectively, as shown in fig. 10, which can realize that different enable signals control different periods of time to turn on different color LED lamps for display, and optimize the mutual influence relationship between different color LEDs, etc.
In summary, the display control method provided by the embodiment of the present invention can implement independent gamma mapping on the multiple color data of each pixel data, ensure the independence of the multiple color data calculation of each pixel data, and ensure the normal display of the color temperature of the white full-gray segment; in addition, a plurality of enabling signals respectively corresponding to a plurality of color data of each pixel data are arranged, wherein the phases of the enabling signals are staggered, so that different color data are turned on for display at different time intervals, the mutual influence relation among the color data is optimized, the gray scale display problem caused by current fluctuation of an LED lamp panel is solved, and the low gray scale color cast problem can be solved by independently adjusting the enabling signals of LED lamps with certain colors; the embodiment of the invention solves the problem of color cast of low-gray display caused by inaccurate expression of a plurality of color data of low-gray display of the display screen, optimizes the phenomenon that EMC frequency points of the display screen are concentrated and the frequency points are higher than ClassA and ClassB, and ensures that the color management of the display screen is more scientific and normative.
[ third embodiment ]
Referring to fig. 11, a third embodiment of the present invention provides a display control apparatus. As shown in fig. 11, the display control device 30 includes, for example, a receiving module 31, a correcting module 33, and an output control module 35.
The receiving module 31 is configured to receive input image data, where each pixel data in the input image data includes a plurality of color data respectively characterized by M bits. The correction module 33 is configured to perform correction processing on the plurality of color data of each of the pixel data to obtain a plurality of target color data corresponding to each of the pixel data and characterized by N bits, where, as shown in fig. 12, the correction module 33 includes, for example, a gamma mapping unit 331, and the gamma mapping unit 331 is configured to perform gamma mapping on the plurality of color data of each of the pixel data according to a plurality of mutually different gamma correction tables, M, N being a positive integer and M < N, respectively. The output control module 35 is configured to control a target display screen to display an image according to the plurality of target color data represented by N bits corresponding to each of the pixel data.
Further, as shown in fig. 12, the correction module 33 further includes, for example, a luminance and chrominance correction unit 333, and the luminance and chrominance correction unit 333 is configured to perform luminance and chrominance correction on the plurality of color data of each pixel data after the gamma mapping.
The output control module 35 is further configured to generate and output a plurality of enable signals corresponding to the plurality of target color data of each of the pixel data, wherein phases of the plurality of enable signals are staggered from each other.
The display control method implemented by the display control apparatus 30 of the present embodiment is as described in the second embodiment, and therefore, will not be described in detail here. Optionally, each module and the other operations or functions in the second embodiment are respectively for implementing the method in the second embodiment of the present invention, and are not described herein for brevity.
In summary, the display control method implemented by the display control apparatus 30 according to the third embodiment of the present invention can implement independent gamma mapping on a plurality of color data of each pixel data, ensure the independence of the calculation of the plurality of color data of each pixel data, and ensure the normal display of the color temperature of the white full gray segment; in addition, a plurality of enabling signals respectively corresponding to a plurality of color data of each pixel data are arranged, wherein the phases of the enabling signals are staggered, so that different color data are turned on for display at different time intervals, the mutual influence relation among the color data is optimized, the gray scale display problem caused by current fluctuation of an LED lamp panel is solved, and the low gray scale color cast problem can be solved by independently adjusting the enabling signals of LED lamps with certain colors; the embodiment of the invention solves the problem of color cast of low-gray display caused by inaccurate expression of a plurality of color data of low-gray display of the display screen, optimizes the phenomenon that EMC frequency points of the display screen are concentrated and the frequency points are higher than ClassA and ClassB, and ensures that the color management of the display screen is more scientific and normative.
[ fourth example ] A
Referring to fig. 13, a fourth embodiment of the present invention provides a display control apparatus 40. As shown in fig. 13, the display control apparatus 40 includes, for example, a programmable logic device 41 for executing the display control method according to the second embodiment. For example, the display control method executed by the programmable logic device 41 includes, for example:
(i) receiving input image data, wherein each pixel data in the input image data contains a plurality of color data respectively characterized by M bits;
(ii) performing correction processing on the plurality of color data of each of the pixel data to obtain a plurality of target color data characterized by N bits corresponding to each of the pixel data, wherein the correction processing includes: gamma mapping the plurality of color data of each of the pixel data based on a plurality of gamma correction tables different from each other, M, N being a positive integer and M < N; and
(iii) and controlling a target display screen to display an image according to the plurality of target color data which are characterized by N bits and correspond to each pixel data.
The programmable logic device is, for example, an FPGA. The display control device 40 provided in this embodiment is, for example, a receiving card in an LED display screen control system, which is also called a scanning card.
In summary, the display control method implemented by the display control apparatus 40 according to the fourth embodiment of the present invention can implement independent gamma mapping on the multiple color data of each pixel data, so as to ensure the independence of the multiple color data calculation of each pixel data, and ensure the normal display of the color temperature of the white full gray segment; in addition, a plurality of enabling signals respectively corresponding to a plurality of color data of each pixel data are arranged, wherein the phases of the enabling signals are staggered, so that different color data are turned on for display at different time intervals, the mutual influence relation among the color data is optimized, the gray scale display problem caused by current fluctuation of an LED lamp panel is solved, and the low gray scale color cast problem can be solved by independently adjusting the enabling signals of LED lamps with certain colors; the embodiment of the invention solves the problem of color cast of low-gray display caused by inaccurate expression of a plurality of color data of low-gray display of the display screen, optimizes the phenomenon that EMC frequency points of the display screen are concentrated and the frequency points are higher than ClassA and ClassB, and ensures that the color management of the display screen is more scientific and normative.
[ fifth embodiment ]
Referring to fig. 14, a fifth embodiment of the present invention provides a display control system. As shown in fig. 14, the display control system 50 includes, for example, a sending card 51, a scanning card 52, and an LED display screen 53.
Wherein, the scanning card 52 is connected with the sending card 51 and the LED display screen 53 respectively.
First, the sending card 51 receives image data sent from an upper computer, for example, where the image data is RGB data or YUV data, and when the image data received by the sending card 51 is YUV data, the sending card 51 needs to convert the YUV data into RGB data. The specific conversion method is, for example, matrix operation by equation (3).
R＝Y+1.4075*(V-128)；
G＝Y-0.3455*(U-128)-0.7169*(V-128)； (3)
B＝Y+1.779*(U-128)；
Y in the formula (3) is expressed as luminance information of the image data, and UV is color information of the image data. In the conversion process on the transmitting card 51, the bit width R/G/B of the image data retains the bit width of the original M bits, and the transmitting card 51 issues the RGB image data of the M bits to each scanning card 52. Wherein M takes the value of 8, for example.
The scan card 52 is configured to receive input image data from the transmission card 51, wherein each pixel data of the input image data includes a plurality of color data represented by M bits, perform correction processing on the plurality of color data of each pixel data to obtain a plurality of target color data corresponding to each pixel data, represented by N bits, and control the LED display 53 to display an image according to the plurality of target color data corresponding to each pixel data, represented by N bits.
Among them, the mentioned correction processing includes, for example: gamma mapping the plurality of color data of each of the pixel data based on a plurality of gamma correction tables different from each other, M, N being a positive integer and M < N. M is, for example, 8 and N is, for example, 16.
Further, the mentioned correction processing, for example, further includes: and performing brightness and chrominance correction on the plurality of color data of each pixel data after the gamma mapping.
Further, the scan card 52 is also used to: and generating and outputting a plurality of enable signals respectively corresponding to the plurality of target color data of each of the pixel data, wherein phases of the plurality of enable signals are staggered from each other.
It should be noted that the scan card 52 provided in this embodiment can implement the display control method according to the second embodiment, for example, and for the specific description of the display control method, reference may be made to the second embodiment. In this regard, the gamma correction table mentioned above is obtained by the method for obtaining a multi-color gamma correction table described in the first embodiment, for a specific description of the method for obtaining a multi-color gamma correction table, reference may be made to the first embodiment.
The mentioned LED display screen 53 includes, for example, a plurality of LED lamp panels, and each LED lamp panel is provided with a plurality of enable signal interfaces for respectively receiving a plurality of enable signals corresponding to a plurality of target color data.
In summary, the display control system 50 according to the fifth embodiment of the present invention can implement independent gamma mapping on a plurality of color data of each pixel data, ensure the independence of the calculation of the plurality of color data of each pixel data, and ensure the normal display of the color temperature of the white full gray segment; in addition, a plurality of enabling signals respectively corresponding to a plurality of color data of each pixel data are arranged, wherein the phases of the enabling signals are staggered, so that different color data are turned on for display at different time intervals, the mutual influence relation among the color data is optimized, the gray scale display problem caused by current fluctuation of an LED lamp panel is solved, and the low gray scale color cast problem can be solved by independently adjusting the enabling signals of LED lamps with certain colors; the embodiment of the invention solves the problem of color cast of low-gray display caused by inaccurate expression of a plurality of color data of low-gray display of the display screen, optimizes the phenomenon that EMC frequency points of the display screen are concentrated and the frequency points are higher than ClassA and ClassB, and ensures that the color management of the display screen is more scientific and normative.
In the embodiments provided in the present invention, it should be understood that the disclosed system, apparatus and/or method may be implemented in other ways. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one logical division, and the actual implementation may have another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units/modules in the embodiments of the present application may be integrated into one processing unit/module, or each unit/module may exist alone physically, or two or more units/modules may be integrated into one unit/module. The integrated units/modules may be implemented in the form of hardware, or may be implemented in the form of hardware plus software functional units/modules.
The integrated units/modules, which are implemented in the form of software functional units/modules, may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions for causing one or more processors of a computer device (which may be a personal computer, a server, or a network device) to execute some steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (13)
1. A method for obtaining a multi-color gamma correction table, comprising:
obtaining 2 of each color of a plurality of colors displayed by a target display screenNEach gray scale value corresponds to 2NMeasuring brightness value to obtain the relationship table of gray level value and measured brightness value of each color, wherein 2NThe gray-scale values are respectively characterized by N bits, and the colors comprise a first color and a second color;
2 to be respectively characterized by M bitsMGamma mapping of gray-scale values into 2 respectively characterized by N bitsMA target gray-scale value to obtain a first gamma correction table corresponding to the first color, wherein M, N is a positive integer and M is<N；
Acquiring the brightness ratio values of the multiple colors under the target color temperature value; and
obtaining a second gamma correction table corresponding to the second color based on the first gamma correction table, the relationship table of the gray scale value and the measured brightness value of the first color, the brightness ratio value and the relationship table of the gray scale value and the measured brightness value of the second color;
the obtaining a second gamma correction table corresponding to the second color based on the first gamma correction table, the relationship table between the gray scale value of the first color and the measured brightness value, the brightness ratio value, and the relationship table between the gray scale value of the second color and the measured brightness value includes:
obtaining 2 characterized by M bits based on the first gamma correction table and the relationship table of the gray scale value and the measured brightness value of the first colorMEach gray scale value corresponds to 2MA first color measurement brightness value;
based on the 2MThe first color measurement brightness value and the brightness ratio value are obtained to be 2MCalculating a brightness value for each second color;
based on the 2MThe second color calculation brightness value inquires the relationship table of the gray scale value and the measurement brightness value of the second color to obtain 2MA second color target gray scale value characterized by N bits; and
based on said 2 characterized by M bitsMA gray scale value and said 2MAnd the second color target gray-scale values are represented by N bits to form the second gamma correction table corresponding to the second color.
2. The method of claim 1, wherein the plurality of colors further comprises a third color;
the method for acquiring the multi-color gamma correction table further comprises the following steps: obtaining a third gamma correction table corresponding to the third color based on the first gamma correction table, the relationship table of the gray scale value and the measured brightness value of the first color, the brightness ratio value and the relationship table of the gray scale value and the measured brightness value of the third color;
wherein the first color, the second color, and the third color are different from each other and are each one of red, green, and blue.
3. The method of any one of claims 1 to 2, wherein N-16 and M-8 are used.
4. A display control method, comprising:
receiving input image data, wherein each pixel data in the input image data contains a plurality of color data respectively characterized by M bits;
performing correction processing on the plurality of color data of each of the pixel data to obtain a plurality of target color data characterized by N bits corresponding to each of the pixel data, wherein the correction processing includes: gamma mapping the plurality of color data of each of the pixel data based on a plurality of gamma correction tables different from each other, M, N being a positive integer and M < N; and
controlling a target display screen to display an image according to the plurality of target color data represented by N bits corresponding to each of the pixel data;
the gamma mapping the plurality of color data of each of the pixel data based on a plurality of gamma correction tables different from each other, respectively, includes: and inquiring the corresponding color data characterized by the N bits from the corresponding gamma correction table based on the color data characterized by each M bits in the plurality of color data characterized by the M bits, thereby completing the gamma mapping.
5. The display control method according to claim 4, wherein the correction processing further includes:
and performing brightness and chrominance correction on the plurality of color data of each pixel data after the gamma mapping.
6. The display control method according to claim 4, characterized by further comprising:
and generating and outputting a plurality of enable signals respectively corresponding to the plurality of target color data of each of the pixel data, wherein phases of the plurality of enable signals are staggered from each other.
7. A display control apparatus, characterized by comprising:
a receiving module, configured to receive input image data, wherein each pixel data in the input image data contains a plurality of color data respectively characterized by M bits;
a correction module, configured to perform correction processing on the multiple color data of each pixel data to obtain multiple target color data corresponding to each pixel data and characterized by N bits, where the correction module includes a gamma mapping unit, configured to perform gamma mapping on the multiple color data of each pixel data according to multiple different gamma correction tables, M, N is a positive integer and M < N; and
the output control module is used for controlling a target display screen to display images according to the target color data which correspond to each pixel data and are represented by N bits;
the gamma mapping the plurality of color data of each of the pixel data according to a plurality of mutually different gamma correction tables, respectively, includes: and inquiring the corresponding color data characterized by the N bits from the corresponding gamma correction table based on the color data characterized by each M bits in the plurality of color data characterized by the M bits, thereby completing the gamma mapping.
8. The display control device according to claim 7, wherein the correction module further comprises:
and a brightness and chrominance correction unit for performing brightness and chrominance correction on the plurality of color data of each pixel data after the gamma mapping.
9. The display control device of claim 7, wherein the output control module is further configured to:
and generating and outputting a plurality of enable signals respectively corresponding to the plurality of target color data of each of the pixel data, wherein phases of the plurality of enable signals are staggered from each other.
10. A display control apparatus, characterized by comprising: a programmable logic device for performing the display control method according to any one of claims 4 to 6.
11. A display control system, comprising:
sending the card;
the scanning card is connected with the sending card;
the LED display screen is connected with the scanning card;
the scanning card is used for receiving input image data from the sending card, each pixel data in the input image data comprises a plurality of color data respectively characterized by M bits, the plurality of color data of each pixel data are corrected to obtain a plurality of target color data corresponding to each pixel data and characterized by N bits, and the LED display screen is controlled to display images according to the plurality of target color data corresponding to each pixel data and characterized by N bits;
wherein the correction processing includes: gamma mapping the plurality of color data of each of the pixel data based on a plurality of gamma correction tables different from each other, M, N being a positive integer and M < N;
the gamma mapping the plurality of color data of each of the pixel data based on a plurality of gamma correction tables different from each other, respectively, includes: and inquiring the corresponding color data characterized by the N bits from the corresponding gamma correction table based on the color data characterized by each M bits in the plurality of color data characterized by the M bits, thereby completing the gamma mapping.
12. The display control system according to claim 11, wherein the correction process further comprises: and performing brightness and chrominance correction on the plurality of color data of each pixel data after the gamma mapping.
13. The display control system of claim 11 or 12, wherein the scan card is further configured to: and generating and outputting a plurality of enable signals respectively corresponding to the plurality of target color data of each of the pixel data, wherein phases of the plurality of enable signals are staggered from each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910300496.7A CN111862880B (en) | 2019-04-15 | 2019-04-15 | Method for acquiring multi-color gamma correction table and display control method, device and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910300496.7A CN111862880B (en) | 2019-04-15 | 2019-04-15 | Method for acquiring multi-color gamma correction table and display control method, device and system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111862880A CN111862880A (en) | 2020-10-30 |
| CN111862880B true CN111862880B (en) | 2021-11-16 |
Family
ID=72951251
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910300496.7A Active CN111862880B (en) | 2019-04-15 | 2019-04-15 | Method for acquiring multi-color gamma correction table and display control method, device and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111862880B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113112952B (en) * | 2019-12-24 | 2022-06-17 | 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 |
| CN112484967B (en) * | 2020-11-18 | 2023-04-07 | 深圳市汇顶科技股份有限公司 | Light intensity detection method, light intensity detection device, light intensity parameter determination method, light intensity parameter determination device, equipment and storage medium |
| CN113920927B (en) * | 2021-10-25 | 2022-08-02 | 武汉华星光电半导体显示技术有限公司 | Display method, display panel and electronic equipment |
| CN113920930A (en) * | 2021-11-12 | 2022-01-11 | 深圳市迈普视通科技有限公司 | Automatic gray scale calibration method and system for color division of display screen |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1889694A (en) * | 2006-07-14 | 2007-01-03 | 华为技术有限公司 | Gamma correcting method, circuit and video-frequency processor |
| CN101123074A (en) * | 2006-08-08 | 2008-02-13 | 奇景光电股份有限公司 | Generation method for gamma mapping table |
| CN101231830A (en) * | 2007-01-26 | 2008-07-30 | 群康科技(深圳)有限公司 | Method for generating LCD device gamma correction table |
| CN102034431A (en) * | 2010-12-09 | 2011-04-27 | 广州杰赛科技股份有限公司 | Gamma correction method and device for LED |
| JP2011164565A (en) * | 2010-02-11 | 2011-08-25 | Samsung Mobile Display Co Ltd | Organic electroluminescent display and method of driving the same |
| CN104299565A (en) * | 2014-10-13 | 2015-01-21 | 西安诺瓦电子科技有限公司 | Low grey scale correction method and system of LED display device |
| CN104485069A (en) * | 2014-12-05 | 2015-04-01 | 西安诺瓦电子科技有限公司 | Adjustment method and system for contrast of LED (Light Emitting Diode) display screen |
| CN106373516A (en) * | 2016-10-31 | 2017-02-01 | 北京集创北方科技股份有限公司 | Led display device and driving method thereof |
| CN109036262A (en) * | 2018-09-06 | 2018-12-18 | 长春希达电子技术有限公司 | The display characteristic curve correcting method and control system of medical LED display |
| CN109599056A (en) * | 2017-09-28 | 2019-04-09 | 西安诺瓦电子科技有限公司 | Image processing method and device, image data processor and its application |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3767315B2 (en) * | 2000-04-17 | 2006-04-19 | セイコーエプソン株式会社 | ELECTRO-OPTICAL PANEL DRIVING METHOD, DATA LINE DRIVING CIRCUIT, ELECTRO-OPTICAL DEVICE, AND ELECTRONIC DEVICE |
| JP2008148055A (en) * | 2006-12-11 | 2008-06-26 | Sony Corp | Apparatus and method for image processing, display device, and projection display device |
| CN113284456B (en) * | 2021-07-21 | 2021-12-10 | 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 |
-
2019
- 2019-04-15 CN CN201910300496.7A patent/CN111862880B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1889694A (en) * | 2006-07-14 | 2007-01-03 | 华为技术有限公司 | Gamma correcting method, circuit and video-frequency processor |
| CN101123074A (en) * | 2006-08-08 | 2008-02-13 | 奇景光电股份有限公司 | Generation method for gamma mapping table |
| CN101231830A (en) * | 2007-01-26 | 2008-07-30 | 群康科技(深圳)有限公司 | Method for generating LCD device gamma correction table |
| JP2011164565A (en) * | 2010-02-11 | 2011-08-25 | Samsung Mobile Display Co Ltd | Organic electroluminescent display and method of driving the same |
| CN102034431A (en) * | 2010-12-09 | 2011-04-27 | 广州杰赛科技股份有限公司 | Gamma correction method and device for LED |
| CN104299565A (en) * | 2014-10-13 | 2015-01-21 | 西安诺瓦电子科技有限公司 | Low grey scale correction method and system of LED display device |
| CN104485069A (en) * | 2014-12-05 | 2015-04-01 | 西安诺瓦电子科技有限公司 | Adjustment method and system for contrast of LED (Light Emitting Diode) display screen |
| CN106373516A (en) * | 2016-10-31 | 2017-02-01 | 北京集创北方科技股份有限公司 | Led display device and driving method thereof |
| CN109599056A (en) * | 2017-09-28 | 2019-04-09 | 西安诺瓦电子科技有限公司 | Image processing method and device, image data processor and its application |
| CN109036262A (en) * | 2018-09-06 | 2018-12-18 | 长春希达电子技术有限公司 | The display characteristic curve correcting method and control system of medical LED display |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111862880A (en) | 2020-10-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111862880B (en) | Method for acquiring multi-color gamma correction table and display control method, device and system | |
| CN111326099B (en) | Display correction method, device and system, storage medium and display system | |
| CN105259687B (en) | A kind of the picture uniformity adjusting method and system of liquid crystal display | |
| US11900852B2 (en) | Method and device for obtaining display compensation information, and display compensation method and device | |
| JP5922160B2 (en) | Display calibration system, program, recording medium | |
| TWI486930B (en) | Color correction method and apparatus for displays | |
| US7561167B2 (en) | Image processing apparatus and image processing method | |
| US9111501B2 (en) | Display device | |
| CN104299565A (en) | Low grey scale correction method and system of LED display device | |
| US10347198B2 (en) | Image displaying methods and display devices | |
| KR20150081085A (en) | Method of compensating image of display panel, method of driving display panel including the same and display apparatus for performing the same | |
| JP2011107703A (en) | Method and device for managing color | |
| US20160314728A1 (en) | Method and Device for Determining Gamma Parameters and Displaying Method and Device for Display | |
| KR20200015863A (en) | Device and method for controlling color gamut, display device including the device for controlling color gamut | |
| KR101893949B1 (en) | LED Individual Correction Method Based On The Operating Computer Of The LED Signboard | |
| CN110728953B (en) | Gray scale voltage correction method, driving method, correction system and storage medium | |
| US20140184663A1 (en) | Driving circuit of display device and method for driving the same | |
| US20130155120A1 (en) | Color Adjustment Device, Method for Adjusting Color, and Display for the Same | |
| WO2022032919A1 (en) | Grayscale-adaptive correction data control method and apparatus, and led display screen | |
| JP2008292680A (en) | Output value setting method, output value setting device and display device | |
| CN113724644B (en) | Method for compensating brightness and chroma of display device and related equipment | |
| US9626892B2 (en) | Optimization method and system of real-time LCD white balance selection | |
| CN112614455B (en) | Display screen color temperature drift compensation method, device and system and display control system | |
| CN113870768B (en) | Display compensation method and device | |
| WO2019127370A1 (en) | Gamma voltage generating circuit and generating method, and display panel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
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 Applicant after: XI'AN NOVASTAR TECH Co.,Ltd. Address before: 710075 DEF101, Zero One Square, Xi'an Software Park, No. 72 Zhangbajie Science and Technology Second Road, Xi'an High-tech Zone, Shaanxi Province Applicant before: Xi'an NovaStar Tech Co.,Ltd. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |