CN111223466B - Color correction method for display - Google Patents
Color correction method for display Download PDFInfo
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- CN111223466B CN111223466B CN202010068849.8A CN202010068849A CN111223466B CN 111223466 B CN111223466 B CN 111223466B CN 202010068849 A CN202010068849 A CN 202010068849A CN 111223466 B CN111223466 B CN 111223466B
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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
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/02—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the way in which colour is displayed
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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
- 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
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0693—Calibration of display systems
Abstract
The invention provides a color correction method of a display, which comprises the steps of providing a test signal for the display on a production station of the display to light the display, measuring the display brightness of the display on the production station, obtaining a first photoelectric conversion curve of the display, storing the photoelectric conversion curve in the production station of the display, calculating a gamma correction parameter by the production station according to a default gamma curve set value of the display, obtaining a target gamma curve and the first photoelectric conversion curve, and carrying out gamma correction on the display by using the gamma correction parameter on the production station to adjust the default gamma curve set value. The color correction method of the display improves the gamma correction effect of products and improves the production efficiency.
Description
Technical Field
The present invention relates to the field of color correction technologies, and in particular, to a color correction method for a display.
Background
The relationship between display screen brightness and gray scale is not linear because of the more sensitive visual characteristics of the human eye to low gray scale. As shown in fig. 1, the relationship between the luminance Y and the gray scale X of the display is an exponential relationship Y ═ XγThe value of gamma should be between 2.2 and 2.5, with 2.2 being common. In factory production, color correction is performed by gamma autocorrection so that the brightness and gray scale curves are as shown in fig. 1 as much as possible.
Disclosure of Invention
A color correction method of a display includes:
step 10: providing a test signal to the display at a production station of the display to light the display;
step 20: measuring the display brightness of the display on the production station to obtain a first photoelectric conversion curve of the display and storing the photoelectric conversion curve in the production station of the display;
step 30: the production work station calculates a gamma correction parameter according to a default gamma curve set value of the display, a target gamma curve and a first photoelectric conversion curve; and
step 40: gamma correction is performed on the display at the production station using the gamma correction parameters to adjust default gamma curve settings.
In an embodiment of the present invention, the method for color correction of a display further includes:
step 50: the production work station judges whether the variation value of the gamma correction parameters of a preset number of continuous displays is smaller than a first default value or not;
if the manufacturing station determines that the variation value of the gamma correction parameters of a preset number of continuous displays is smaller than a first default value, then step 60 is executed: the production work station carries out gamma correction on the subsequent displays by using the gamma correction parameter of one of the preset number of continuous displays; and
if the manufacturing station determines that the variation value of the gamma correction parameters of a preset number of consecutive displays is greater than the first default value, the manufacturing station performs step 10 on the subsequent displays.
In an embodiment of the present invention, step 60 further includes:
step 70: providing the test signal to the display again on the production station of the display to light the display;
step 72: measuring the display brightness of the display again on the production work station to obtain a second photoelectric conversion curve of the display; and
step 74: the production work station judges whether the difference between the second photoelectric conversion curve and the target gamma curve is larger than a second default value or not;
if the production station judges that the difference between the second photoelectric conversion curve and the target gamma curve is greater than a second default value, the production station executes the step 10 on the display and the subsequent displays; and
if the manufacturing station determines that the difference between the second photoelectric conversion curve and the target gamma curve is not greater than the second default value, the manufacturing station performs step 60 on the subsequent display.
In an embodiment of the invention, the color correction method further includes:
after the predetermined number of times from step 10 to step 40, the manufacturing station performs step 80: and the production station calculates to obtain fitting gamma correction parameters according to the gamma correction parameters and performs gamma correction on the subsequent display by using the fitting gamma correction parameters.
In one embodiment of the present invention, after step 40, the following steps are performed:
step 70: providing the test signal to the display again on the production station of the display to light the display; and
step 72: measuring the display brightness of the display again on the production work station to obtain a second photoelectric conversion curve of the display;
the color correction method of the display further comprises the following steps:
step 90: the production work station judges whether the variation value of gamma correction parameters of a preset number of continuous displays is smaller than a first default value or not and judges whether the difference between a second photoelectric conversion curve and a target gamma curve is larger than a second default value or not;
if the production station determines that the variation value of the gamma correction parameters of a preset number of continuous displays is smaller than a first default value and determines that the difference between the second photoelectric conversion curve and the target gamma curve is not larger than a second default value, the production station performs step 70 and step 72 on the subsequent displays; and
if the production station determines that the variation value of the gamma correction parameters of a preset number of consecutive displays is greater than the first default value and determines that the difference between the second photoelectric conversion curve and the target gamma curve is greater than the second default value, the production station performs step 10 on the subsequent displays.
A production station of a display comprises a transmission unit, a driving unit, an image capturing unit, a processing unit and a storage unit, wherein the processing unit is used for executing a color correction method of the display, and the color correction method of the display comprises the following steps:
step 10: providing a test signal to the display at a production station of the display to light the display;
step 20: measuring the display brightness of the display on the production station to obtain a first photoelectric conversion curve of the display and storing the photoelectric conversion curve in the production station of the display;
step 30: the production work station calculates a gamma correction parameter according to a default gamma curve set value of the display, a target gamma curve and a first photoelectric conversion curve; and
step 40: gamma correction is performed on the display at the production station using the gamma correction parameters to adjust default gamma curve settings.
In an embodiment of the present invention, the method for color correction of a display further includes:
step 50: the production work station judges whether the variation value of the gamma correction parameters of a preset number of continuous displays is smaller than a first default value or not;
if the manufacturing station determines that the variation value of the gamma correction parameters of a preset number of continuous displays is smaller than a first default value, then step 60 is executed: the production work station carries out gamma correction on the subsequent displays by using the gamma correction parameter of one of the preset number of continuous displays; and
if the manufacturing station determines that the variation value of the gamma correction parameters of a preset number of consecutive displays is greater than the first default value, the manufacturing station performs step 10 on the subsequent displays.
In an embodiment of the present invention, step 60 further includes:
step 70: providing the test signal to the display again on the production station of the display to light the display;
step 72: measuring the display brightness of the display again on the production work station to obtain a second photoelectric conversion curve of the display; and
step 74: the production work station judges whether the difference between the second photoelectric conversion curve and the target gamma curve is larger than a second default value or not;
if the production station judges that the difference between the second photoelectric conversion curve and the target gamma curve is greater than a second default value, the production station executes the step 10 on the display and the subsequent displays; and
if the manufacturing station determines that the difference between the second photoelectric conversion curve and the target gamma curve is not greater than the second default value, the manufacturing station performs step 60 on the subsequent display.
In an embodiment of the present invention, the method further includes:
after the predetermined number of times from step 10 to step 40, the manufacturing station performs step 80: and the production station calculates to obtain fitting gamma correction parameters according to the gamma correction parameters and performs gamma correction on the subsequent display by using the fitting gamma correction parameters.
In one embodiment of the present invention, after step 40, the following steps are performed:
step 70: providing the test signal to the display again on the production station of the display to light the display; and
step 72: measuring the display brightness of the display again on the production work station to obtain a second photoelectric conversion curve of the display;
the color correction method of the display further comprises the following steps:
step 90: the production work station judges whether the variation value of gamma correction parameters of a preset number of continuous displays is smaller than a first default value or not and judges whether the difference between a second photoelectric conversion curve and a target gamma curve is larger than a second default value or not;
if the production station determines that the variation value of the gamma correction parameters of a preset number of continuous displays is smaller than a first default value and determines that the difference between the second photoelectric conversion curve and the target gamma curve is not larger than a second default value, the production station performs step 70 and step 72 on the subsequent displays; and
if the production station determines that the variation value of the gamma correction parameters of a preset number of consecutive displays is greater than the first default value and determines that the difference between the second photoelectric conversion curve and the target gamma curve is greater than the second default value, the production station performs step 10 on the subsequent displays.
The color correction method of the display improves the gamma correction effect of products and improves the production efficiency.
Drawings
FIG. 1 is a graph of luminance versus gray scale curves; and
FIG. 2 is a flowchart illustrating a color correction method for a display according to an embodiment of the present invention.
Detailed Description
According to fig. 2, a color correction method of a display includes:
step 10: providing a test signal to the display at a production station of the display to light the display;
step 20: measuring the display brightness of the display on the production station to obtain a first photoelectric conversion curve of the display and storing the photoelectric conversion curve in the production station of the display;
step 30: the production work station calculates a gamma correction parameter according to a default gamma curve set value of the display, a target gamma curve and a first photoelectric conversion curve;
step 40: gamma correction is carried out on the display by using the gamma correction parameters on the production station so as to adjust the default gamma curve set value;
step 50: the production work station judges whether the variation value of the gamma correction parameters of a preset number of continuous displays is smaller than a first default value or not;
if the production workstation determines that the variation value of the gamma correction parameters of the preset number of continuous displays is smaller than a first default value, executing step 60;
step 60: the production work station carries out gamma correction on the subsequent displays by using the gamma correction parameter of one of the preset number of continuous displays;
if the manufacturing station determines that the variation value of the gamma correction parameters of a preset number of consecutive displays is greater than the first default value, the manufacturing station performs the step 10 on the subsequent displays.
In addition, step 60 is followed by:
step 70: providing the test signal to the display again on the production station of the display to light the display; step 72: measuring the display brightness of the display again on the production work station to obtain a second photoelectric conversion curve of the display; and step 74: and the production work station judges whether the difference between the second photoelectric conversion curve and the target gamma curve is greater than a second default value. If the manufacturing station determines that the difference between the second photoelectric conversion curve and the target gamma curve is greater than the second default value, the manufacturing station performs step 10 on the display and the subsequent displays. If the manufacturing station determines that the difference between the second photoelectric conversion curve and the target gamma curve is not greater than the second default value, the manufacturing station performs step 60 on the subsequent display.
The color correction method of a display according to another embodiment of the present invention further includes the steps of:
after the predetermined number of times from step 10 to step 40, the manufacturing station performs step 80: and the production station calculates to obtain fitting gamma correction parameters according to the gamma correction parameters and performs gamma correction on the subsequent display by using the fitting gamma correction parameters. In addition, after step 40:
step 70: providing the test signal to the display again on the production station of the display to light the display; and step 72: and measuring the display brightness of the display again on the production station to obtain a second photoelectric conversion curve of the display.
The color correction method of a display according to another embodiment of the present invention further includes the steps of:
step 90: the production workstation determines whether variation values of gamma correction parameters of a preset number of continuous displays are smaller than a first default value and whether the difference between a second photoelectric conversion curve and a target gamma curve is larger than a second default value. If the manufacturing station determines that the variation value of the gamma correction parameters of a preset number of consecutive displays is smaller than the first default value and determines that the difference between the second photoelectric conversion curve and the target gamma curve is not greater than the second default value, the manufacturing station performs step 70 and step 72 on the subsequent displays. If the production station determines that the variation value of the gamma correction parameters of a preset number of consecutive displays is greater than the first default value and determines that the difference between the second photoelectric conversion curve and the target gamma curve is greater than the second default value, the production station performs step 10 on the subsequent displays.
The invention further provides a production station of the display. The production station comprises a transmission unit, a driving unit, an image capturing unit, a processing unit and a storage unit. The processing unit is used for executing a color correction method of the display. The details of the color correction method of the display are the same as those described above, and therefore, the description thereof is omitted.
While the invention has been described in conjunction with specific embodiments thereof, it is to be understood that many alternatives, modifications, and variations will be apparent to those skilled in the art. Accordingly, it is intended to embrace all such alternatives, modifications, and variations that fall within the scope of the included claims.
Claims (8)
1. A method for color correction of a display, comprising:
step 10: providing a test signal to the display at a production station of the display to illuminate the display;
step 20: measuring the display brightness of the display on the production station to obtain a first photoelectric conversion curve of the display and storing the photoelectric conversion curve in the production station of the display;
step 30: the production work station calculates a gamma correction parameter according to a default gamma curve set value of the display, a target gamma curve and the first photoelectric conversion curve;
step 40: gamma correcting the display using the gamma correction parameters on the production workstation to adjust the default gamma curve settings; and
step 50: the production work station judges whether the variation value of the gamma correction parameters of a preset number of continuous displays is smaller than a first default value or not;
if the production workstation determines that the variation value of the gamma correction parameters of a preset number of continuous displays is smaller than the first default value, then step 60 is executed: the production station carries out gamma correction on the subsequent displays by the gamma correction parameters of one of the displays in the preset number; and
if the manufacturing station determines that the variation value of the gamma correction parameters of a preset number of consecutive displays is greater than the first default value, the manufacturing station performs the step 10 on the subsequent displays.
2. The method for color correction of a display of claim 1, further comprising, after step 60:
step 70: providing the test signal to the display again on the production station of the display to light the display;
step 72: measuring the display brightness of the display again on the production work station to obtain a second photoelectric conversion curve of the display; and
step 74: the production work station judges whether the difference between the second photoelectric conversion curve and the target gamma curve is larger than a second default value or not;
if the manufacturing station determines that the difference between the second photoelectric conversion curve and the target gamma curve is greater than the second default value, the manufacturing station performs the step 10 on the display and the subsequent displays; and
if the manufacturing station determines that the difference between the second photoelectric conversion curve and the target gamma curve is not greater than the second default value, the manufacturing station performs the step 60 on the subsequent display.
3. The color correction method for a display of claim 1, further comprising:
after the predetermined number of times from step 10 to step 40, the manufacturing station performs step 80: and the production work station calculates to obtain fitting gamma correction parameters according to the gamma correction parameters and carries out gamma correction on the subsequent display by using the fitting gamma correction parameters.
4. The color correction method for a display according to claim 1, wherein the step 40 is followed by:
step 70: providing the test signal to the display again on the production station of the display to light the display; and
step 72: measuring the display brightness of the display again on the production work station to obtain a second photoelectric conversion curve of the display;
the color correction method of the display further comprises the following steps:
step 90: the production work station judges whether variation values of gamma correction parameters of a preset number of continuous displays are smaller than a first default value or not and judges whether the difference between the second photoelectric conversion curve and the target gamma curve is larger than a second default value or not;
if the production station determines that the variation value of the gamma correction parameters of a preset number of consecutive displays is smaller than a first default value and determines that the difference between the second photoelectric conversion curve and the target gamma curve is not larger than a second default value, the production station performs step 70 and step 72 on the subsequent displays; and
if the manufacturing station determines that the variation value of the gamma correction parameters of a preset number of consecutive displays is greater than a first default value and determines that the difference between the second photoelectric conversion curve and the target gamma curve is greater than a second default value, the manufacturing station performs the step 10 on the subsequent displays.
5. A production station of a display device, comprising a transmission unit, a driving unit, an image capturing unit, a processing unit and a storage unit, wherein the processing unit is configured to perform a color calibration method of the display device, the color calibration method of the display device comprising:
step 10: providing a test signal to the display at a production station of the display to illuminate the display;
step 20: measuring the display brightness of the display on the production station to obtain a first photoelectric conversion curve of the display and storing the photoelectric conversion curve in the production station of the display;
step 30: the production work station calculates a gamma correction parameter according to a default gamma curve set value of the display, a target gamma curve and the first photoelectric conversion curve; and
step 40: gamma correcting the display using the gamma correction parameters on the production workstation to adjust the default gamma curve settings; and
step 50: the production work station judges whether the variation value of the gamma correction parameters of a preset number of continuous displays is smaller than a first default value or not;
if the production workstation determines that the variation value of the gamma correction parameters of a preset number of continuous displays is smaller than the first default value, then step 60 is executed: the production station carries out gamma correction on the subsequent displays by the gamma correction parameters of one of the displays in the preset number; and
if the manufacturing station determines that the variation value of the gamma correction parameters of a preset number of consecutive displays is greater than the first default value, the manufacturing station performs the step 10 on the subsequent displays.
6. The display manufacturing station of claim 5, further comprising, after step 60:
step 70: providing the test signal to the display again on the production station of the display to light the display;
step 72: measuring the display brightness of the display again on the production work station to obtain a second photoelectric conversion curve of the display; and
step 74: the production work station judges whether the difference between the second photoelectric conversion curve and the target gamma curve is larger than a second default value or not;
if the manufacturing station determines that the difference between the second photoelectric conversion curve and the target gamma curve is greater than the second default value, the manufacturing station performs the step 10 on the display and the subsequent displays; and
if the manufacturing station determines that the difference between the second photoelectric conversion curve and the target gamma curve is not greater than the second default value, the manufacturing station performs the step 60 on the subsequent display.
7. The display production station of claim 5, further comprising:
after the predetermined number of times from step 10 to step 40, the manufacturing station performs step 80: and the production work station calculates to obtain fitting gamma correction parameters according to the gamma correction parameters and carries out gamma correction on the subsequent display by using the fitting gamma correction parameters.
8. The display production station of claim 5, wherein after said step 40:
step 70: providing the test signal to the display again on the production station of the display to light the display; and
step 72: measuring the display brightness of the display again on the production work station to obtain a second photoelectric conversion curve of the display;
the color correction method of the display further comprises the following steps:
step 90: the production work station judges whether variation values of gamma correction parameters of a preset number of continuous displays are smaller than a first default value or not and judges whether the difference between the second photoelectric conversion curve and the target gamma curve is larger than a second default value or not;
if the production station determines that the variation value of the gamma correction parameters of a preset number of consecutive displays is smaller than a first default value and determines that the difference between the second photoelectric conversion curve and the target gamma curve is not larger than a second default value, the production station performs step 70 and step 72 on the subsequent displays; and
if the manufacturing station determines that the variation value of the gamma correction parameters of a preset number of consecutive displays is greater than a first default value and determines that the difference between the second photoelectric conversion curve and the target gamma curve is greater than a second default value, the manufacturing station performs the step 10 on the subsequent displays.
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| CN202010068849.8A CN111223466B (en) | 2020-01-21 | 2020-01-21 | Color correction method for display |
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| JP2006525538A (en) * | 2003-04-18 | 2006-11-09 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | LCD gamma correction |
| CN1324902C (en) * | 2004-02-16 | 2007-07-04 | 钰瀚科技股份有限公司 | Method of color correction |
| KR100970883B1 (en) * | 2008-10-08 | 2010-07-20 | 한국과학기술원 | The apparatus for enhancing image considering the region characteristic and method therefor |
| CN104050922B (en) * | 2014-06-26 | 2016-03-23 | 云南北方奥雷德光电科技股份有限公司 | The method of rapid build OLED display Gamma correction look-up table |
| CN105336290B (en) * | 2015-11-18 | 2018-06-01 | 青岛海信电器股份有限公司 | Gamma Gamma bearing calibrations and device |
| KR102449369B1 (en) * | 2015-12-07 | 2022-10-04 | 삼성디스플레이 주식회사 | Display device and method of testing a display device |
| KR102525979B1 (en) * | 2018-05-17 | 2023-04-27 | 삼성디스플레이 주식회사 | Gamma voltage generator and display device |
| CN109036233B (en) * | 2018-09-07 | 2020-04-28 | 四川长虹电器股份有限公司 | Production line multipoint automatic Gamma curve debugging method and system |
| CN109036326B (en) * | 2018-10-23 | 2021-02-02 | 惠科股份有限公司 | Method and device for adjusting gamma curve of display panel |
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