CN111292670B - White balance adjustment method and white balance test data calculation method - Google Patents
White balance adjustment method and white balance test data calculation method Download PDFInfo
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- CN111292670B CN111292670B CN202010240271.XA CN202010240271A CN111292670B CN 111292670 B CN111292670 B CN 111292670B CN 202010240271 A CN202010240271 A CN 202010240271A CN 111292670 B CN111292670 B CN 111292670B
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- 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
- G09G3/2003—Display of colours
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- G—PHYSICS
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- 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
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Abstract
A white balance adjusting method is characterized in that a first white balance test data with a first bit depth is subjected to difference processing to be converted into a second white balance test data with a higher data bit depth, so that an image acquisition device acquires gray scale data, at most, of which the number is the same as that of the first bit depth, on a white balance test image according to the first bit depth, and a display panel displays the image with the second bit depth according to the second white balance test data after difference processing.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a white balance adjustment method and a white balance test data calculation method.
Background
When white balance adjustment is performed, the amount of gray scale data acquired by an image acquisition device on a white balance test image is related to the bit depth of initial white balance test data output by a control processing device (such as a computer, etc.), that is, if the bit width of the initial white balance test data is 8 bits, 256 bit depths are corresponding to the initial white balance test data, and at this time, 256 gray scale data need to be acquired by the image acquisition device on the white balance test image.
In order to present better visual effect on the display panel, the control processing device usually inputs the initial white balance test data with higher data bit width, however, this makes the image capturing device acquire more gray scale data on the white balance test image, and thus the efficiency of white balance adjustment cannot be improved, and the production load is increased.
Therefore, it is necessary to provide a white balance adjustment method and a white balance test data calculation method to achieve better visual effect and improve the efficiency of white balance adjustment on the display panel.
Disclosure of Invention
The present invention provides a white balance adjustment method and a white balance test data calculation method to achieve better visual effect and improve the efficiency of white balance adjustment on a display panel.
A first aspect of the present invention provides a white balance adjustment method, including the steps of:
controlling the processing device to output initial white balance test data with a first bit width and a first bit depth to the video conversion board;
the video conversion board converts the initial white balance test data into first white balance test data with the first bit depth and a second bit width larger than the first bit width according to a conversion lookup table, and outputs the first white balance test data to a time sequence control board;
a microcontroller in the timing control board performs difference processing on the first white balance test data to convert the first white balance test data into second white balance test data having a second bit width and a second bit depth greater than the first bit depth;
the time sequence control board outputs the second white balance test data to a display panel through a signal connecting board, the display panel displays an image with the second bit depth according to the second white balance test data, an image acquisition device is used for acquiring gray scale data of the white balance test image, and the image acquisition device acquires the gray scale data, at most, of which the number is the same as that of the first bit depth, on the white balance test image; and performing white balance adjustment according to the collected gray scale data;
further, the first bit width is 8 bits, and the second bit width is 10 bits.
Further, the microcontroller in the timing control board performing difference processing on the first white balance test data to convert into the second white balance test data having the second bit width and the second bit depth larger than the first bit depth includes the steps of:
the time sequence controller in the time sequence control board reads the first white balance test data which is stored in an external storage and has the second bit width and the first bit depth and then stores the first white balance test data in an internal storage; and the microcontroller reads the first white balance test data in the memory and performs interpolation processing on the gray scale data to obtain second white balance test data with the second bit width and the second bit depth.
Further, the first white balance test data stored in the external memory is in a binary format.
Further, the second white balance test data performs difference processing of gray-scale data according to a gamma value of 2.2.
Further, the microcontroller in the timing control board performs difference processing on the first white balance test data to convert the first white balance test data into second white balance test data having the second bit width and the second bit depth, and then the method further includes the following steps:
and writing the second white balance test data into a difference lookup table, and identifying a register for storing the difference lookup table.
The second aspect of the present invention provides a white balance test data calculation method, including the following steps:
the time sequence controller in the time sequence control board reads the first white balance test data stored in the external memory and stores the first white balance test data in the internal memory; and
a microcontroller in the time sequence control board reads the first white balance test data in the memory and performs interpolation processing on gray scale data of the first white balance test data to obtain second white balance test data with the same data bit width as the first white balance test data and data bit depth larger than the first white balance test data; and
and writing the second white balance test data into a difference lookup table, and identifying a register for storing the difference lookup table.
Further, the first white balance test data stored in the external memory is in a binary format.
Further, the second white balance test data is subjected to difference processing of gray scale data according to a gamma value of 2.2.
Further, when the second white balance test data is written into the difference lookup table, the register flag is 1, which indicates that the white balance test data stored therein is the second white balance test data having the second bit width and the second bit depth.
According to the invention, the visual effect of the image output by the display panel is enhanced by performing difference processing on the first white balance test data with the first bit depth to convert the first white balance test data into the second white balance test data with higher data bit depth, and meanwhile, the image acquisition device only needs to acquire gray scale data at most as much as the first bit depth on the white balance test image, so that the number of the gray scale data acquired by the image acquisition device is reduced, and the efficiency of white balance adjustment is improved.
Drawings
Fig. 1 is a schematic diagram of a white balance adjustment system according to an embodiment of the present invention.
Fig. 2 is a schematic flow chart of a white balance adjustment method according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of white balance test data conversion for three emission colors.
Fig. 4 is a schematic flow chart of a white balance test data calculation method according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and effects of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.
Referring to fig. 1, fig. 1 is a schematic diagram of a white balance adjustment system according to an embodiment of the present invention. The white balance adjustment system includes a control processing device 11, a video converter board 12, a timing control board 13, a signal connection board 14, a display panel 15, and an image capturing device 16, wherein the control processing device 11 (such as a computer) is configured to output initial white balance test data having a first bit width and a first bit depth to the video converter board 12; the video converter board 12 is configured to convert the received initial white balance test data into first white balance test data having a second bit width and a first bit depth that can be supported by a timing controller (disposed on the timing control board 13) according to a conversion look-up table, and transmit the first white balance test data to the timing control board 13; the timing control board 13 includes the timing controller, when the display panel 15 is powered on and the first white balance test data is input to the timing control board 13 from the video conversion board 12, the timing controller reads the first white balance test data stored in an external memory (e.g., a flash memory) and then stores the first white balance test data in a memory (e.g., a DDR SRAM), and then a microcontroller in the timing controller reads the first white balance test data stored in the memory and performs difference processing on the first white balance test data to convert the first white balance test data into second white balance test data with a second bit width and a second bit depth, wherein the second white balance test data can be recognized by a data driving circuit and a scan driving circuit; the signal connection board 12 is coupled to the display panel 11 and the timing control board 13, and the timing controller transmits the second white balance test data to the display panel 11 through the signal connection board 12; the display panel 11 displays a white balance test image according to the second white balance test data; the image capturing device 16 includes a testing light probe 161 and an optical testing instrument 162, where the testing light probe 161 captures gray scale data with the same number as or different from the first bit depth on the white balance test image according to the first bit depth, and transmits the captured result to the optical testing instrument 162 for analysis, for example, if the first bit depth is 256, the testing light probe 161 captures at most 256 gray scale data on the white balance test image, and transmits the gray scale data to the optical testing instrument 162 for analysis. If the collected gray scale data of the white balance test image is within the specification range, the white balance adjustment is completed, and if the collected gray scale data of the white balance test image is not within the specification range, the optical test instrument 162 recalculates the initial white balance test data according to the difference value between the collected gray scale data of the white balance test image and the gray scale data of the standard sample, and re-inputs the calculated initial white balance test data to the display panel 11 through the control processing device 11 again, so as to retest the white balance test image and the white balance adjustment.
The present invention is directed to outputting initial white balance test data having a first bit width and a first bit depth to reduce the number of collected data, and forming second white balance test data having a second bit width and a second bit depth to enhance the display effect, which will be described in detail later.
In order to reduce the number of the image capturing devices 16 and to make the image output by the display panel 15 have better visual effect, the embodiment of the present invention further provides a white balance test data calculation method, which enhances the visual effect by performing difference processing on the first white balance test data with the first bit depth to convert into the second white balance test data with higher data bit depth (i.e. the first bit depth is smaller than the second bit depth), and at the same time, since the control processing device 11 outputs the initial white balance test data with the first bit width (corresponding to the first bit depth), the image capturing device 16 needs to capture the same number of gray scale data on the white balance test image as the number of the first bit depth at most. It is understood that the first bit width and the second bit width correspond to the first bit depth and the second bit depth, respectively, that is, if the first bit width and the second bit width are 8 bits and 10 bits, respectively, 256 bits and 1024 bits correspond to the first bit depth and the second bit depth, respectively. Unless otherwise specified, the data bit width corresponds to the data bit depth.
Referring to fig. 2, fig. 2 is a schematic flow chart of a white balance adjustment method according to an embodiment of the present invention. The white balance adjustment method includes the steps of:
step S10: the control processing device 11 outputs the initial white balance test data having the first bit width and the first bit depth to the video conversion board 12.
Step S20: the video conversion board 12 converts the initial white balance test data into first white balance test data having the first bit depth and a second bit width larger than the first bit width according to a conversion look-up table, and outputs the first white balance test data to the timing control board 13.
In this step, the video converter board 12 may use the data bit depth (i.e. the first bit depth) of the initial white balance test data as the address of the conversion lookup table, and output the gray scale data with the second bit width corresponding to the address of the conversion lookup table as the first white balance test data, for example, the data bit width and the data bit depth of the initial white balance test data are 8bit and 256 respectively, which are to be converted into the first white balance test data with the data bit width and the data bit depth of 10bit and 256 respectively, then the first data bit depth [0] (the gray scale data corresponding to itself is 00000000 with the data bit width of 8 bit) of the initial white balance test data is used as the first address of the conversion lookup table, and the gray scale data with the first data bit depth [0] corresponding to the conversion lookup table is 00000000000000 with the data bit width of 10bit, 0000000000 outputs the first gray scale data as the first white balance test data, and accordingly the first white balance test data obtains 256 gray scale data having a data bit width of 10 bits.
Further, the video conversion board 12 may set three same or different display look-up tables for the three emission colors of red/green/blue in the initial white balance test data to output the three emission colors of red/green/blue in the first white balance test data, respectively (as shown in fig. 3).
Step S30: the microcontroller in the timing control board 13 performs a difference process on the first white balance test data to convert into second white balance test data having a second bit width and a second bit depth larger than the first bit depth.
Further, this step is a white balance test data calculation method provided in the embodiment of the present invention, which specifically includes the following steps (as shown in fig. 4):
step S31: the timing controller in the timing control board 13 reads the first white balance test data having the second bit width and the first bit depth stored in the external memory and stores the first white balance test data in the memory.
In this step, when the display panel 15 is powered on and the first white balance test data is outputted from the video converter board 12 to the timing control board 13, the first white balance test data is first stored in the external memory (e.g. flash) in a binary format, and then the processor (not shown) in the timing controller can store the first white balance test data in the memory (e.g. DDR SRAM).
Step S32: and the microcontroller reads the first white balance test data in the memory and performs interpolation processing on the gray scale data to obtain second white balance test data with the second bit width and the second bit depth.
In this step, the microcontroller may select any two groups of gray scale data in the first white balance test data to perform linear difference or nonlinear difference, so as to obtain all gray scale data of the second white balance test data with the second bit depth (the difference processing of the gray scale data may be performed according to the gamma value of 2.2), that is, the second white balance test data has the same number of gray scale data as the second bit depth. For example, the data bit width and the data bit depth of the first white balance test data are respectively 10 bits and 256, which are to be converted into the second white balance test data having a data bit width and a data bit depth of 10 bits and 1024 bits, and the first data bit depth [0] (the corresponding gray scale data is 0000000000) and the second data bit depth [1] (the corresponding gray scale data is 0000000100) of the first white balance test data respectively correspond to the first data bit depth [0] (the gray scale data is 0000000000) and the fifth data bit depth [4] (the gray scale data is 0000000100) of the second white balance test data, so that three gray scale data can be differed between 0000000000 and 0000000100, and accordingly, the second white balance test data can obtain 1024 gray scale data having a data bit width of 10 bits.
Further, in order to save the time for difference processing, the following steps are included after converting into the second white balance test data:
step 33: and writing the second white balance test data into a difference lookup table, and identifying a register for storing the difference lookup table.
In this step, after the register is identified (for example, identified as 1), the second white balance test data having the second bit width and the second bit depth after the difference processing is represented as the white balance test data stored therein. It is understood that, if the second white balance test data tested this time is not within the specification range last, the register may be re-identified (for example, identified as 0) to store the second white balance test data tested next time in the register again; if the second white balance test data tested this time is finally within the specification range, when the display panel 15 displays an image (at this time, the white balance adjustment is completed), the second white balance test data in the register may be directly read (saving the time for difference processing) according to the difference lookup table to increase the expression of the color gradation.
Step S40: the timing control board 13 outputs the second white balance test number to the display panel 15 through the signal connection board 14, the display panel 15 displays an image with the second bit depth according to the second white balance test data, and an image acquisition device 16 is used for acquiring gray scale data of the white balance test image, and the image acquisition device 16 acquires gray scale data of the white balance test image, which is at most the same number as the first bit depth.
In this step, the image capturing device 16 includes a test light probe 161 and an optical testing instrument 162, and the test light probe 161 captures the same amount of gray scale data as the first bit depth to the plurality of phases on the white balance test image and transmits the captured result to the optical testing instrument 162 for analysis.
In this step, since the number of gray scale data on the white balance test image acquired by the image acquisition device 16 is related to the data bit depth of the initial white balance test data, that is, if the data bit depth of the initial white balance test data is 1024, the image acquisition device 16 needs to acquire 1024 gray scale data on the white balance test image. The white balance test data calculation method provided by the embodiment of the present invention converts the first white balance test data having the first bit depth into the second white balance test data having the second bit depth, so that the display panel 15 can display an image having the second bit depth to enhance a visual effect, and the image acquisition device 16 only needs to acquire gray scale data having the same number as the first bit depth to multiple phases, so as to reduce the number of gray scale data that the image acquisition device 16 needs to acquire, thereby improving the efficiency of white balance adjustment.
Step S50: and carrying out white balance adjustment according to the collected gray scale data.
In this step, if the collected gray scale data of the white balance test image is within the specification range, the white balance adjustment is completed, and if the collected gray scale data of the white balance test image is not within the specification range, the optical test instrument 162 recalculates the initial white balance test data according to the difference value between the gray scale data of the standard sample and the gray scale data of the standard sample, and re-inputs the calculated initial white balance test data to the display panel 11 through the control processing device 11 again, so as to retest the white balance test image and the white balance adjustment.
Although the present invention has been described with reference to the preferred embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, and that various changes and modifications may be effected therein by one skilled in the art without departing from the scope of the invention as defined by the appended claims.
Claims (10)
1. A white balance adjustment method is characterized by comprising the following steps:
controlling the processing device to output initial white balance test data with a first bit width and a first bit depth to the video conversion board;
the video conversion board converts the initial white balance test data into first white balance test data with the first bit depth and a second bit width larger than the first bit width according to a conversion lookup table, and outputs the first white balance test data to a time sequence control board;
a microcontroller in the timing control board performs difference processing on the first white balance test data to convert into second white balance test data having a second bit width and a second bit depth larger than the first bit depth;
the time sequence control board outputs the second white balance test number to a display panel through a signal connecting board, the display panel displays an image with the second bit depth according to the second white balance test data, an image acquisition device is used for acquiring gray scale data of the white balance test image, and the image acquisition device acquires the gray scale data of the white balance test image, wherein the number of the gray scale data is at most the same as that of the first bit depth; and
and carrying out white balance adjustment according to the collected gray scale data.
2. The white balance adjustment method according to claim 1, characterized in that: the first bit width is 8 bits, and the second bit width is 10 bits.
3. The white balance adjustment method according to claim 1, wherein the microcontroller in the timing control board performs difference processing on the first white balance test data to convert into the second white balance test data having the second bit width and the second bit depth larger than the first bit depth comprises the steps of:
the time sequence controller in the time sequence control board reads the first white balance test data which is stored in an external memory and has the second bit width and the first bit depth and then stores the first white balance test data in an internal memory; and
and the microcontroller reads the first white balance test data in the memory and performs interpolation processing on the gray scale data to obtain second white balance test data with the second bit width and the second bit depth.
4. The white balance adjustment method according to claim 3, characterized in that: the first white balance test data stored in the external memory is in a binary format.
5. The white balance adjustment method according to claim 1, characterized in that: and the second white balance test data carries out difference processing on the gray scale data according to the gamma value of 2.2.
6. The white balance adjustment method according to claim 1, wherein the microcontroller in the timing control board further performs the following steps after performing difference processing on the first white balance test data to convert the first white balance test data into the second white balance test data having the second bit width and the second bit depth:
and writing the second white balance test data into a difference lookup table, and identifying a register for storing the difference lookup table.
7. A white balance test data calculation method is characterized by comprising the following steps:
the time sequence controller in the time sequence control board reads the first white balance test data stored in the external memory and stores the first white balance test data in the internal memory; and
a microcontroller in the time sequence control board reads the first white balance test data in the memory and performs interpolation processing on gray scale data of the first white balance test data to obtain second white balance test data with the same data bit width as the first white balance test data and data bit depth larger than the first white balance test data; and
and writing the second white balance test data into a difference lookup table, and identifying a register for storing the difference lookup table.
8. The method of calculating white balance test data according to claim 7, wherein: the first white balance test data stored in the external memory is in a binary format.
9. The method of calculating white balance test data according to claim 7, wherein: and the second white balance test data carries out difference processing of gray scale data according to the gamma value of 2.2.
10. The method of calculating white balance test data according to claim 7, wherein:
when the second white balance test data is written into the difference lookup table, the register identifier is 1, which indicates that the white balance test data stored therein is the second white balance test data having a second bit width and a second bit depth.
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| KR100266166B1 (en) * | 1998-06-13 | 2000-09-15 | 구자홍 | Apparatus of adjusting white balance for plasma display panel |
| CN103730096B (en) * | 2013-12-31 | 2016-09-14 | 深圳市华星光电技术有限公司 | White balance adjustment method and system, liquid crystal display manufacture method |
| CN104361859B (en) * | 2014-11-18 | 2017-01-11 | 深圳市华星光电技术有限公司 | Display device and brightness adjusting method thereof |
| CN105405413B (en) * | 2015-12-29 | 2018-10-26 | Tcl新技术（惠州）有限公司 | A kind of white balance realization method and system of adjust automatically LCD splicings |
| JP2017220889A (en) * | 2016-06-10 | 2017-12-14 | キヤノン株式会社 | Image processing system, its control method, and display device |
| CN107454335B (en) * | 2017-08-31 | 2020-03-27 | Oppo广东移动通信有限公司 | Image processing method, image processing device, computer-readable storage medium and mobile terminal |
| CN109389932A (en) * | 2018-11-21 | 2019-02-26 | 惠科股份有限公司 | Vision-control method and display device |
| CN109308868B (en) * | 2018-12-18 | 2021-03-19 | 惠科股份有限公司 | Display panel driving method and system and display device |
| CN109935219B (en) * | 2019-04-09 | 2020-08-11 | 惠州市华星光电技术有限公司 | Display method of spliced panel |
| CN110113591B (en) * | 2019-05-13 | 2021-07-06 | Tcl华星光电技术有限公司 | White balance adjustment system |
| CN110491348A (en) * | 2019-07-31 | 2019-11-22 | 惠州市德赛西威汽车电子股份有限公司 | A kind of display screen white balance adjusting method and its system |
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