CN1941922A - Method for correcting color and adjusting white balance - Google Patents

Method for correcting color and adjusting white balance Download PDF

Info

Publication number
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
Authority
CN
China
Prior art keywords
red
ray machine
chromaticity coordinates
green
blue
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN 200510104207
Other languages
Chinese (zh)
Other versions
CN100486340C (en
Inventor
董玉珍
刘影疏
刘风雷
赵仁智
黄文杰
王显刚
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hisense Co Ltd
Hisense Visual Technology Co Ltd
Original Assignee
Hisense Group Co Ltd
Qingdao Hisense Electronics Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hisense Group Co Ltd, Qingdao Hisense Electronics Co Ltd filed Critical Hisense Group Co Ltd
Priority to CNB2005101042074A priority Critical patent/CN100486340C/en
Publication of CN1941922A publication Critical patent/CN1941922A/en
Application granted granted Critical
Publication of CN100486340C publication Critical patent/CN100486340C/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Processing Of Color Television Signals (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)

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

Adjust the color correcting method of white balance
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:
x C = x B y B × Y B + x G y G × Y G x B y B × Y B + x G y G × Y G + Y B + Y G + ( 1 - x B - y B ) y B × Y B + ( 1 - x G - y G ) y G × Y G
y C = Y B + Y G x B y B × Y B + x G y G × Y G + Y B + Y G + ( 1 - x B - y B ) y B × Y B + ( 1 - x G - y G ) y G × Y G
Extrapolate the chromaticity coordinates (x of magenta by red, the blue data of test acquisition M, y M) expression formula be:
x M = x B y B × Y B + x R y R × Y R x B y B × Y B + x R y R × Y R + Y B + Y R + ( 1 - x B - y B ) y B × Y B + ( 1 - x R - y R ) y R × Y R
y M = Y B + Y R x B y B × Y B + x R y R × Y R + Y B + Y R + ( 1 - x B - y B ) y B × Y B + ( 1 - x R - y R ) y R × Y R
Extrapolate yellow chromaticity coordinates (x by red, green data that test obtains Y, y Y) expression formula be:
x Y = x R y R × Y R + x G y G × Y G x R y R × Y R + x G y G × Y G + Y R + Y G + ( 1 - x R - y R ) y R × Y R + ( 1 - x G - y G ) y G × Y G
y Y = Y R + Y G x R y R × Y R + x G y G × Y G + Y R + Y G + ( 1 - x R - y R ) y R × Y R + ( 1 - x G - y G ) y G × Y G
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:
x C = x B y B × Y B + x G y G × Y G x B y B × Y B + x G y G × Y G + Y B + Y G + ( 1 - x B - y B ) y B × Y B + ( 1 - x G - y G ) y G × Y G
y C = Y B + Y G x B y B × Y B + x G y G × Y G + Y B + Y G + ( 1 - x B - y B ) y B × Y B + ( 1 - x G - y G ) y G × Y G
Extrapolate the chromaticity coordinates (x of magenta by red, the blue data of test acquisition M, y M) expression formula be:
x M = x B y B × Y B + x R y R × Y R x B y B × Y B + x R y R × Y R + Y B + Y R + ( 1 - x B - y B ) y B × Y B + ( 1 - x R - y R ) y R × Y R
y M = Y B + Y R x B y B × Y B + x R y R × Y R + Y B + Y R + ( 1 - x B - y B ) y B × Y B + ( 1 - x R - y R ) y R × Y R
Extrapolate yellow chromaticity coordinates (x by red, green data that test obtains Y, y Y) expression formula be:
x Y = x R y R × Y R + x G y G × Y G x R y R × Y R + x G y G × Y G + Y R + Y G + ( 1 - x R - y R ) y R × Y R + ( 1 - x G - y G ) y G × Y G
y Y = Y R + Y G x R y R × Y R + x G y G × Y G + Y R + Y G + ( 1 - x R - y R ) y R × Y R + ( 1 - x G - y G ) y G × Y G
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,
x C = x B y B × Y B + x G y G × Y G x B y B × Y B + x G y G × Y G + Y B + Y G + ( 1 - x B - y B ) y B × Y B + ( 1 - x G - y G ) y G × Y G
y C = Y B + Y G x B y B × Y B + x G y G × Y G + Y B + Y G + ( 1 - x B - y B ) y B × Y B + ( 1 - x G - y G ) y G × Y G .
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,
x M = x B y B × Y B + x R y R × Y R x B y B × Y B + x R y R × Y R + Y B + Y R + ( 1 - x B - y B ) y B × Y B + ( 1 - x R - y R ) y R × Y R
y M = Y B + Y R x B y B × Y B + x R y R × Y R + Y B + Y R + ( 1 - x B - y B ) y B × Y B + ( 1 - x R - y R ) y R × Y R .
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,
x Y = x R y R × Y R + x G y G × Y G x R y R × Y R + x G y G × Y G + Y R + Y G + ( 1 - x R - y R ) y R × Y R + ( 1 - x G - y G ) y G × Y G
y Y = Y R + Y G x R y R × Y R + x G y G × Y G + Y R + Y G + ( 1 - x R - y R ) y R × Y R + ( 1 - x G - y G ) y G × Y G .
CNB2005101042074A 2005-09-28 2005-09-28 Color correcting method for adjusting white balance Active CN100486340C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNB2005101042074A CN100486340C (en) 2005-09-28 2005-09-28 Color correcting method for adjusting white balance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNB2005101042074A CN100486340C (en) 2005-09-28 2005-09-28 Color correcting method for adjusting white balance

Publications (2)

Publication Number Publication Date
CN1941922A true CN1941922A (en) 2007-04-04
CN100486340C CN100486340C (en) 2009-05-06

Family

ID=37959627

Family Applications (1)

Application Number Title Priority Date Filing Date
CNB2005101042074A Active CN100486340C (en) 2005-09-28 2005-09-28 Color correcting method for adjusting white balance

Country Status (1)

Country Link
CN (1) CN100486340C (en)

Cited By (5)

* Cited by examiner, † Cited by third party
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

Cited By (7)

* Cited by examiner, † Cited by third party
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

Also Published As

Publication number Publication date
CN100486340C (en) 2009-05-06

Similar Documents

Publication Publication Date Title
US8743152B2 (en) Display apparatus, method of driving display apparatus, drive-use integrated circuit, driving method employed by drive-use integrated circuit, and signal processing method
US7728846B2 (en) Method and apparatus for converting from source color space to RGBW target color space
CN101383126B (en) Method and apparatus for processing digital image to be displayed on display device with backlight module
CN1652198A (en) Display device and driving method thereof
CN1905685A (en) Field sequential display apparatus and method thereof
CN101895770B (en) Uniformity correcting method for separating brightness and chromaticity of LED display screen
CN1862646A (en) Display device and apparatus and method for driving the same
CN1941922A (en) Method for correcting color and adjusting white balance
CN1148963C (en) Image conversion apparatus and method therefor
CN105741720A (en) Image rendering method and display device
WO2018113050A1 (en) Drive method and drive apparatus of display panel
CN111179801B (en) Color space adjustment method, device and system of display panel
US20160358540A1 (en) Display substrate, driving method thereof and display device
CN110599938B (en) Display panel and picture display method
US8233007B2 (en) Display device, method for generating four or more primary color signals, and program causing computer to execute processing for generating four or more primary color signals
CN1375995A (en) Use of low-brightness filtering to reduce non-natural glint signals
CN1571003A (en) Method and apparatus for calculating an average picture level and plasma display using the same
CN1801279A (en) Method for improving gray scale grade of plasma display panel
EP2009930A2 (en) Image display apparatus
CN1628470A (en) Color calibrator for flat panel display and method thereof
CN100351880C (en) Plasma two-dimensional display with grey scale white balancing device
CN1588197A (en) Color filter with brightening structure
CN101552926B (en) Method and device for processing color picture signals
CN1874526A (en) Apparatus for detecting, correcting attenuation and processing in hue, saturation and luminance directions
CN1127263C (en) Correction method for uniform bright field of CRT projection TV

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
CP01 Change in the name or title of a patent holder

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.

CP01 Change in the name or title of a patent holder