CN1941922A - Method for correcting color and adjusting white balance - Google Patents
Method for correcting color and adjusting white balance Download PDFInfo
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- CN1941922A CN1941922A CN 200510104207 CN200510104207A CN1941922A CN 1941922 A CN1941922 A CN 1941922A CN 200510104207 CN200510104207 CN 200510104207 CN 200510104207 A CN200510104207 A CN 200510104207A CN 1941922 A CN1941922 A CN 1941922A
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Abstract
The method comprises: the white color balance adjustment is achieved using optical-machine driving circuit; after test, the obtained bright and chroma data is calculated in order to generate the chromaticity coordinate of generate yellow, magenta and cyan; the chroma coordinate of ideal white field is written into the register through I2C; adjusting the chroma coordinate processed with color correction into ideal color coordinate so as to define the difference between different optical machine color as the value of ideal chroma coordinate.
Description
Technical field
The present invention relates to a kind of white balance adjustment method of the DLP of being used for optical display TV, this method realizes the brightness that the red, green, blue primary colours were once finished and do not lost in colour correction, to guarantee the view reception effect of program image.
Background technology
Present existing television set, as common CRT TV, LCD TV, PDP and rear-projection TV etc., because the hardware designs difference of TV kinescope or display screen, all there is difference in various degree in shown white the chromaticity coordinates that comes out.
White chromaticity coordinates difference for television set, if do not carry out correspondingly white balance correction, then more easily form the bigger difference on the display effect of program image, therefore in the television set production process, all must carry out white balance correction, so that the Show Color of every television set reaches unanimity.The white balance correction technology of existing television set, normally set white the coordinate figure that need reach (x y), then by adjusting the gain coefficient of the red, green, blue color in the circuit, realizes white the coordinate desired value of setting approx in advance.
The shortcoming of existing white balance correcting is comparatively obvious, adjust the gain coefficient of the red, green, blue color in the circuit on the one hand respectively, when gain coefficient less than 1 the time, thereby also will lose the brightness of red, green, blue primary colours to some extent, and lose whole display brightness; If gain coefficient is adjusted ground greater than 1, can cause highlighted saturatedly again, cause highlighted color to proofread and correct effectively.
On the other hand, existing white balance adjustment method must divide a plurality of passages such as video, high definition, DVI, VGA to carry out, and each passage all will be tested, adjust consuming time long, production efficiency is lower.
Summary of the invention
The color correcting method of adjustment white balance of the present invention, its purpose is to address the above problem with deficiency and realizes the white balance adjustment based on the ray machine drive circuit, brightness that draws by test and chroma data are by calculating to generate the chromaticity coordinate value of Huang, magenta and cyan, a desirable white chromaticity coordinates of needs setting is write in the register by I2C, chromaticity coordinates after the colour correction is adjusted into desirable chromaticity coordinates, thereby can the difference unification of different ray machine colors be defined as the value of desirable chromaticity coordinates according to the value of setting a white chromaticity coordinates.
The color correcting method of described adjustment white balance is this basic principle of carrying out imaging by ray machine at optical display TV.Ray machine itself is provided with the special driving circuit, and front end all will output to the ray machine drive plate at last no matter the how many kinds of passage is arranged, and by ray machine image is shown.
If carry out the adjustment of white balance, just need not the multiple passage of branch, also need not through the repeatedly test of white balance from the drive circuit of ray machine.
The color correcting method of described adjustment white balance, its realization flow is:
The first step, the control ray machine also sends red, green, blue, Bai Si kind signal respectively from the ray machine circuit, just send signal and test, with the brightness Y of test and colourity (x, y) data are kept among the EEPROM of ray machine;
Data value as the described red, green, blue of following table, Bai Si kind signal.
x | y | Y | |
Red | x R | y R | Y R |
Green | x G | y G | Y G |
Blue | x B | y B | Y B |
White | x W | y W | Y W |
In second step, the control front-end circuit passes through I
2C reads and has ray machine E
2Data among the PROM write these data in the ray machine drive plate chip relevant register then.
In the 3rd step, generate chromaticity coordinate values yellow, pinkish red, these three kinds of newly-increased colors of cyan;
The chromaticity coordinate value of Huang, magenta, cyan can also can be tested the chromaticity coordinates that obtains Huang, magenta, cyan by testing red, green, blue, the data reckoning acquisition of field in vain that obtains.
In the 4th step, red, green, blue look and chromaticity coordinates yellow, pinkish red, cyan are passed through I
2C writes in corresponding another register of ray machine chip, and the yield value of above-mentioned color all is set at 1, then can not cause the lowering of luminance of these three kinds of primary colours of red, green, blue.The coordinate figure of respective color as shown in the table:
x | y | Gain | |
Red | x R | y R | 1 |
Green | x G | y G | 1 |
Blue | x B | y B | 1 |
Cyan | x C | y C | 1 |
Pinkish red | x M | y M | 1 |
Yellow | x Y | y Y | 1 |
White | x W1 | y W1 | 1 |
The 5th step is with white the desirable chromaticity coordinates (x of needs adjustment
W1, y
W1), pass through I
2C writes in the ray machine chip relevant register.
The 6th step, carry out colour correction, the chromaticity coordinates after proofreading and correct all is adjusted into desirable chromaticity coordinates (x
W1, y
W1).
As above-mentioned content, the color correcting method of described adjustment white balance is to adjust on the ray machine drive circuit, blue or green, pinkish red and yellow is the adjustment color that increases newly, and the chromaticity coordinates of its chromaticity coordinates and these three kinds of primary colours of red, green, blue look is all by white the desirable chromaticity coordinates (x that sets
W1, y
W1) adjust, and then realize the color of ray machine is adjusted into the value of white chromaticity coordinates of setting.
Extrapolate the chromaticity coordinates (x of cyan by green, the blue data of test acquisition
C, y
C) expression formula be:
Extrapolate the chromaticity coordinates (x of magenta by red, the blue data of test acquisition
M, y
M) expression formula be:
Extrapolate yellow chromaticity coordinates (x by red, green data that test obtains
Y, y
Y) expression formula be:
Content to sum up, the advantage of the color correcting method of adjustment white balance of the present invention is: can be according to the value of setting a white chromaticity coordinates, the difference unification of different ray machine colors is defined as the value of desirable chromaticity coordinates, can not only effectively adjust the color of white balance, and avoid the problem that causes brightness to descend because of the white balance adjustment, correction at the ray machine drive circuit need not to regulate versicolor gain, and is simple to operate.
Description of drawings
Fig. 1 is the colour correction schematic diagram of existing television set.
Fig. 2 is a structural representation of using white balance colour correction of the present invention.
Fig. 3 is the flow chart of described white balance color correcting method.
Embodiment
As shown in Figure 1, the color correcting method of existing television set is by adjusting the gain coefficient of the red, green, blue color in the circuit, realizing white the coordinate desired value of setting approx.
And front-end circuit needs to adjust respectively with regard to a plurality of passages such as video, high definition, DVI, VGA, exports ray machine then after each lane testing, the adjustment to and carries out the image demonstration.
Embodiment 1, and as shown in Figures 2 and 3, the color correcting method of described adjustment white balance is to carry out the white balance adjustment on the drive circuit of ray machine, and the specific implementation flow process is,
The first step, the control ray machine also sends red, green, blue, Bai Si kind signal respectively from the ray machine circuit, just send signal and test, with the brightness Y of test and colourity (x, y) data are kept among the EEPROM of ray machine;
In second step, the control front-end circuit passes through I
2C reads and has ray machine E
2Data among the PROM write these data in the ray machine drive plate chip relevant register then.
In the 3rd step, generate chromaticity coordinate values yellow, pinkish red, these three kinds of newly-increased colors of cyan;
The chromaticity coordinate value of Huang, magenta, cyan is by the data reckoning acquisition of testing the red, green, blue that obtains, white field.
Extrapolate the chromaticity coordinates (x of cyan by green, the blue data of test acquisition
C, y
C) expression formula be:
Extrapolate the chromaticity coordinates (x of magenta by red, the blue data of test acquisition
M, y
M) expression formula be:
Extrapolate yellow chromaticity coordinates (x by red, green data that test obtains
Y, y
Y) expression formula be:
In the 4th step, red, green, blue look and chromaticity coordinates yellow, pinkish red, cyan are passed through I
2C writes in corresponding another register of ray machine chip, and the yield value of above-mentioned color all is set at 1, then can not cause the lowering of luminance of these three kinds of primary colours of red, green, blue.
The 5th step is with white the desirable chromaticity coordinates (x of needs adjustment
W1, y
W1), pass through I
2C writes in the ray machine chip relevant register.
The 6th step, carry out colour correction, the chromaticity coordinates after proofreading and correct all is adjusted into desirable chromaticity coordinates (x
W1, y
W1).
Claims (4)
1, a kind of color correcting method of adjusting white balance is characterized in that: carry out the adjustment of white balance from the drive circuit of ray machine, its realization flow is,
The first step, the control ray machine also sends red, green, blue, Bai Si kind signal respectively from the ray machine circuit, just send signal and test, with the brightness Y of test and colourity (x, y) data are kept among the EEPROM of ray machine;
In second step, the control front-end circuit passes through I
2C reads and has ray machine E
2Data among the PROM write these data in the ray machine drive plate chip relevant register then;
In the 3rd step, generate chromaticity coordinate values yellow, pinkish red, these three kinds of newly-increased colors of cyan;
The chromaticity coordinate value of Huang, magenta, cyan can also can be tested the chromaticity coordinates that obtains Huang, magenta, cyan by testing red, green, blue, the data reckoning acquisition of field in vain that obtains;
In the 4th step, red, green, blue look and chromaticity coordinates yellow, pinkish red, cyan are passed through I
2C writes in corresponding another register of ray machine chip, and the yield value of above-mentioned color all is set at 1, then can not cause the lowering of luminance of these three kinds of primary colours of red, green, blue.The coordinate figure of respective color as shown in the table;
The 5th step is with white the desirable chromaticity coordinates (x of needs adjustment
W1, y
W1), pass through I
2C writes in the ray machine chip relevant register;
The 6th step, carry out colour correction, the chromaticity coordinates after proofreading and correct all is adjusted into desirable chromaticity coordinates (x
W1, y
W1).
2, the color correcting method of adjustment white balance according to claim 1 is characterized in that: the chromaticity coordinates (x that is extrapolated cyan by green, the blue data of test acquisition
C, y
C), its expression formula is as follows,
3, the color correcting method of adjustment white balance according to claim 1 and 2 is characterized in that: the chromaticity coordinates (x that is extrapolated magenta by red, the blue data of test acquisition
M, y
M), its expression formula is as follows,
4, the color correcting method of adjustment white balance according to claim 3 is characterized in that: red, the green data that obtains by test extrapolate yellow chromaticity coordinates (xY, yY), its expression formula is as follows,
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103414905A (en) * | 2013-08-08 | 2013-11-27 | 京东方科技集团股份有限公司 | White balance data adjusting method, device and system |
CN104200791A (en) * | 2014-09-24 | 2014-12-10 | 深圳市兆驰股份有限公司 | Fast adaptive white balance correction method |
CN104330942A (en) * | 2014-10-30 | 2015-02-04 | 广东威创视讯科技股份有限公司 | Color keeping method and system of laser optical machine |
CN111091789A (en) * | 2018-10-23 | 2020-05-01 | 纬联电子科技(中山)有限公司 | Display device and color correction method thereof |
WO2021012217A1 (en) * | 2019-07-24 | 2021-01-28 | Qualcomm Incorporated | Technologies for preserving highlight details in images |
-
2005
- 2005-09-28 CN CNB2005101042074A patent/CN100486340C/en active Active
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103414905A (en) * | 2013-08-08 | 2013-11-27 | 京东方科技集团股份有限公司 | White balance data adjusting method, device and system |
CN103414905B (en) * | 2013-08-08 | 2015-07-01 | 京东方科技集团股份有限公司 | White balance data adjusting method, device and system |
US9288460B2 (en) | 2013-08-08 | 2016-03-15 | Boe Technology Group Co., Ltd. | Method, apparatus, and system for adjusting white balance data |
CN104200791A (en) * | 2014-09-24 | 2014-12-10 | 深圳市兆驰股份有限公司 | Fast adaptive white balance correction method |
CN104330942A (en) * | 2014-10-30 | 2015-02-04 | 广东威创视讯科技股份有限公司 | Color keeping method and system of laser optical machine |
CN111091789A (en) * | 2018-10-23 | 2020-05-01 | 纬联电子科技(中山)有限公司 | Display device and color correction method thereof |
WO2021012217A1 (en) * | 2019-07-24 | 2021-01-28 | Qualcomm Incorporated | Technologies for preserving highlight details in images |
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CN100486340C (en) | 2009-05-06 |
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Address after: 266071 Shandong city of Qingdao province Jiangxi City Road No. 11 Patentee after: HISENSE Co.,Ltd. Patentee after: Hisense Video Technology Co.,Ltd. Address before: 266071 Shandong city of Qingdao province Jiangxi City Road No. 11 Patentee before: HISENSE Co.,Ltd. Patentee before: HISENSE ELECTRIC Co.,Ltd. |
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