CN112419957A - Method for improving correction brightness of display screen - Google Patents
Method for improving correction brightness of display screen Download PDFInfo
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- CN112419957A CN112419957A CN202011342636.6A CN202011342636A CN112419957A CN 112419957 A CN112419957 A CN 112419957A CN 202011342636 A CN202011342636 A CN 202011342636A CN 112419957 A CN112419957 A CN 112419957A
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- brightness
- correction
- pixels
- display screen
- compensation
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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
- G09G3/2007—Display of intermediate tones
- G09G3/2074—Display of intermediate tones using sub-pixels
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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
- G09G2320/0626—Adjustment of display parameters for control of overall brightness
Abstract
The invention relates to a method for improving the correction brightness of a display screen, which comprises the following steps: in the range of the display screen which can be accommodated by the camera field of view, firstly, the brightness correction of the whole screen is completed; in the correction process, obtaining the brightness values and position coordinates of all the half bright spots of the whole screen; calculating a brightness compensation ratio according to the ratio of the corrected brightness of the whole screen to the brightness of the half bright point; determining the coordinates of surrounding pixels according to the position coordinates of the semi-bright points; and brightening the pixels around the half bright point according to the brightness compensation proportion, and eliminating the brightness defects at all the half bright points. The invention can lighten the influence of the brightness defect, reduce the uncorrected proportion on the visual effect, improve the display quality and improve the brightness of the display screen under the condition of ensuring the original uncorrected proportion.
Description
Technical Field
The invention belongs to the technical field of optical acquisition and correction of display screens.
Background
The display screen is composed of array type display pixels with equal spacing. These display pixels have a large difference in brightness. Therefore, the brightness of the whole screen needs to be consistent through brightness correction. If the brightness of all the display pixels is equal to the corrected brightness, the corrected display screen is perfect in brightness. However, in engineering practice, the brightness of the display screen pixel will have the following distortions:
irregularity in luminance:
a) semi-bright pixel
b) Blind spot pixel
c) Process defect pixel
After the whole screen correction, the brightness irregularity still appears as a defect of the display brightness, resulting in a blind spot and a dark spot of the final display effect. The correction principle itself is to reduce the luminance of pixels having luminance higher than the target luminance level to the target luminance, thereby making the entire screen luminance uniform. The pixels below the target brightness level after brightness correction are divided into two categories, one is completely unlit pixels, which are called blind spots; the other is pixels with a luminance lower than the target luminance, which we call half-bright. Due to the existence of blind spots and half-bright spots, the uniformity of the brightness of the whole screen is influenced. For completely unlighted pixels, namely blind spots, if the number exceeds the field standard, the method of replacing the pixels can be adopted to eliminate the defects. For semi-bright spots, the spots appear as brightness flaws on the display on a display screen with a certain display brightness. If the whole screen determines the corrected target brightness according to the half bright point with the lowest brightness, the brightness of the whole screen is very low. It is practical to give up a certain number of half-bright points to determine the correction target brightness. The brightness of the display screen is improved, so that excessive half-bright points are caused, and the display quality is influenced; reducing the number of half-bright spots can only reduce the target brightness of brightness correction, which reduces the entire screen brightness. The trade-off between the two limits the overall screen target brightness.
Disclosure of Invention
The invention aims to provide a method for improving the correction brightness of a display screen, which can lighten the influence of the brightness defect of a half-bright point.
In order to solve the above technical problem, the method for improving the correction brightness of the display screen of the invention comprises the following steps:
in the range of the display screen which can be accommodated by the camera field of view, firstly, the brightness correction of the whole screen is completed; in the correction process, obtaining the brightness values and position coordinates of all the half bright spots of the whole screen; calculating a brightness compensation ratio according to the ratio of the corrected brightness of the whole screen to the brightness of the half bright spot; the brightness compensation proportion exceeds the set compensation upper limit value, and the brightness compensation proportion is limited to the compensation upper limit value;
determining the coordinates of surrounding pixels according to the position coordinates of the semi-bright points; and brightening the pixels around the half-bright point according to the brightness compensation ratio, and eliminating the brightness defects at all the half-bright points.
The upper limit value of the compensation is 115%.
The brightness compensation ratio can be used as a brightening ratio to be multiplied by the correction coefficient of the pixels around the half-bright point to brighten the pixels, so that the brightness defect at the half-bright point is eliminated.
The brightness compensation ratio can be multiplied by the correction coefficients of the pixels at the left side and the right side of the half bright point to brighten the half bright point, and the brightness defect at the half bright point is eliminated.
The brightness compensation ratio can be multiplied by the correction coefficients of the pixels at the upper side and the lower side of the half bright point to brighten the half bright point, and the brightness defect at the half bright point is eliminated.
The brightness compensation ratio can be multiplied by the correction coefficient of the four-side pixel around the half-bright point to brighten the pixel, and the brightness defect at the half-bright point is eliminated.
The brightness compensation ratio can be multiplied by the correction coefficient of eight pixels around the half-bright point to brighten the pixel, and the brightness defect at the half-bright point is eliminated.
According to the invention, the brightness of the pixels around the pixel with the half-brightness defect is regularly improved according to the brightness compensation proportion, so that human eyes cannot feel the brightness defect at a common observation distance, and the influence of the brightness defect can be reduced to improve the display quality. The display quality indicator for a display screen can be quantitatively described as the proportion of pixels below the corrected brightness, which we call the "uncorrected proportion". The lower this uncorrected proportion, the better the display quality. By adopting the invention, the uncorrected proportion of the visual effect can be reduced, thereby improving the display quality. Practical experience shows that the maximum upper limit of compensation of the method for improving the brightness of the surrounding pixels and compensating the brightness defect of the half-bright pixels when the display screen is viewed at the normal observation distance is about 15% improvement of the brightness of the surrounding pixels, that is, the brightness of the pixels within 15% lower than the corrected brightness can be compensated into the brightness 'flawless' pixels by the method. In other words, the technology can be used for improving the corrected brightness by 15 percent under the condition of ensuring the quality of the original display screen, namely ensuring the original uncorrected proportion, so that the brightness of the display screen is improved.
Drawings
The invention is described in further detail below with reference to the figures and specific examples.
Fig. 1 is a schematic diagram of a dot-by-dot pixel containing a half-bright point.
Fig. 2 is a schematic diagram of pixels on the left and right sides of a half-bright point.
FIG. 3 is a schematic diagram of pixels on both upper and lower sides of a half-bright point.
FIG. 4 is a diagram of four-sided pixels around a half-bright point.
FIG. 5 is a diagram of eight pixels around a half-bright point.
Detailed Description
Example one
In this embodiment: double-sided correction of defective pixels.
Step one), in the whole screen range which can be accommodated by the camera view field, the whole screen correction is firstly completed. In the correction process, the brightness value and the position coordinate of the half-bright point A of the whole screen are naturally obtained. See fig. 1.
And step two), calculating a brightness compensation ratio according to the ratio of the whole screen correction brightness to the half-bright point brightness value. The brightness compensation proportion exceeds the set compensation upper limit value, and the brightness compensation proportion is limited to the compensation upper limit value. The upper limit of the compensation is generally set to 115%.
And step three), determining the coordinates of the pixels a and b at the left and right sides or the pixels c and d at the upper and lower sides of the semi-bright point according to the position coordinates of the semi-bright point. See fig. 2, 3.
And step four), taking the brightness compensation proportion as a brightening proportion, and multiplying the brightening proportion by correction coefficients of pixels a and b on the left side and the right side of the half-bright point or pixels c and d on the upper side and the lower side respectively to improve the brightness of the pixels a and b on the left side and the right side or the pixels c and d on the upper side and the lower side, so that the brightness defects of all the half-bright points are eliminated.
Example two
In this embodiment: and correcting four sides of the defective pixel.
Step one), in the whole screen range which can be accommodated by the camera view field, the whole screen correction is firstly completed. In the correction process, the brightness value and the position coordinate of the half-bright point A of the whole screen are naturally obtained. See fig. 1.
And step two), calculating a brightness compensation ratio according to the ratio of the whole screen correction brightness to the half-bright point brightness value. The brightness compensation proportion exceeds the set compensation upper limit value, and the brightness compensation proportion is limited to the compensation upper limit value. Wherein the upper limit of the compensation is set to 115%.
And step three), determining the coordinates of the surrounding four-side pixels a, b, c and d according to the position coordinates of the semi-bright points. See fig. 2, 3.
And step four), taking the brightness compensation proportion as a brightening proportion, and multiplying the brightening proportion by correction coefficients of the four-side pixels a, b, c and d around the half-bright point respectively to improve the brightness of the four-side pixels a, b, c and d around the half-bright point, so that the brightness defects of all the half-bright points are eliminated.
EXAMPLE III
In this embodiment: and correcting the defective pixel in eight directions.
Step one), in the whole screen range which can be accommodated by the camera view field, the whole screen correction is firstly completed. In the correction process, the brightness value and the position coordinate of the half-bright point A of the whole screen are naturally obtained. See fig. 1.
And step two), calculating a brightness compensation ratio according to the ratio of the whole screen correction brightness to the half-bright point brightness value. The brightness compensation proportion exceeds the set compensation upper limit value, and the brightness compensation proportion is limited to the compensation upper limit value. Wherein the upper limit of the compensation is set to 115%.
And step three), determining the coordinates of the surrounding eight-direction pixels a-h according to the position coordinates of the semi-bright point. See fig. 2, 3.
And step four), taking the brightness compensation proportion as a brightening proportion, and multiplying the brightening proportion by correction coefficients of the eight-direction pixels a-h around the half-bright point respectively to improve the brightness of the eight-direction pixels a-h around the half-bright point, so that the brightness defects of all the half-bright points are eliminated.
It should be understood that the above only shows preferred embodiments, which should not be taken as limiting the scope of the invention. Many simple variations on the above embodiments are possible to those skilled in the art. Therefore, it should be understood that any simple modification made on the basis of the technical solution of claim 1 should be within the protection scope of the present invention.
Claims (7)
1. A method for improving the correction brightness of a display screen is characterized by comprising the following steps:
in the range of the display screen which can be accommodated by the camera field of view, firstly, the brightness correction of the whole screen is completed; in the correction process, obtaining the brightness values and position coordinates of all the half bright spots of the whole screen; calculating a brightness compensation ratio according to the ratio of the corrected brightness of the whole screen to the brightness of the half bright spot; the brightness compensation proportion exceeds the set compensation upper limit value, and the brightness compensation proportion is limited to the compensation upper limit value;
determining the coordinates of surrounding pixels according to the position coordinates of the semi-bright points; and brightening the pixels around the half-bright point according to the brightness compensation ratio, and eliminating the brightness defects at all the half-bright points.
2. The method according to claim 1, wherein the upper compensation limit is 115%.
3. The method for improving the correction brightness of the display screen according to claim 1, wherein the brightness compensation ratio is used as a brightness enhancement ratio to multiply the correction coefficient of the pixels around the half-bright point for brightness enhancement.
4. The method for improving the corrected brightness of the display screen according to claim 3, wherein the brightness compensation ratio is multiplied by the correction coefficient of the pixels at the left and right sides of the half-bright point to brighten the pixels.
5. The method for improving the corrected brightness of the display screen according to claim 3, wherein the brightness compensation ratio is multiplied by the correction coefficients of the pixels at the upper and lower sides of the half-bright point to brighten the half-bright point.
6. The method for improving the correction brightness of the display screen according to claim 3, wherein the brightness compensation ratio is multiplied by the correction coefficient of the four-sided pixels around the half-bright point to increase the brightness.
7. The method for improving the correction brightness of the display screen according to claim 3, wherein the brightness compensation ratio is multiplied by the correction coefficient of eight pixels around the half-bright point to increase the brightness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011342636.6A CN112419957A (en) | 2020-11-26 | 2020-11-26 | Method for improving correction brightness of display screen |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011342636.6A CN112419957A (en) | 2020-11-26 | 2020-11-26 | Method for improving correction brightness of display screen |
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| CN112419957A true CN112419957A (en) | 2021-02-26 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103778887A (en) * | 2013-03-21 | 2014-05-07 | 西安电子科技大学 | Method and device for correcting brightness of LED display device |
| KR20160040394A (en) * | 2014-10-02 | 2016-04-14 | 엘지디스플레이 주식회사 | Display device |
| CN107886905A (en) * | 2016-09-29 | 2018-04-06 | 上海顺久电子科技有限公司 | Backlight subarea control method and device |
| CN107886904A (en) * | 2016-09-29 | 2018-04-06 | 上海顺久电子科技有限公司 | Backlight subarea control method and device |
| CN109727569A (en) * | 2017-10-27 | 2019-05-07 | 优显科技股份有限公司 | The luminance compensation method of light emitting device |
| US10354577B1 (en) * | 2015-06-02 | 2019-07-16 | X Development Llc | Masking non-functioning pixels in a display |
| CN111179863A (en) * | 2020-01-07 | 2020-05-19 | Tcl华星光电技术有限公司 | Backlight adjusting method and device and display device |
-
2020
- 2020-11-26 CN CN202011342636.6A patent/CN112419957A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103778887A (en) * | 2013-03-21 | 2014-05-07 | 西安电子科技大学 | Method and device for correcting brightness of LED display device |
| KR20160040394A (en) * | 2014-10-02 | 2016-04-14 | 엘지디스플레이 주식회사 | Display device |
| US10354577B1 (en) * | 2015-06-02 | 2019-07-16 | X Development Llc | Masking non-functioning pixels in a display |
| CN107886905A (en) * | 2016-09-29 | 2018-04-06 | 上海顺久电子科技有限公司 | Backlight subarea control method and device |
| CN107886904A (en) * | 2016-09-29 | 2018-04-06 | 上海顺久电子科技有限公司 | Backlight subarea control method and device |
| CN109727569A (en) * | 2017-10-27 | 2019-05-07 | 优显科技股份有限公司 | The luminance compensation method of light emitting device |
| CN111179863A (en) * | 2020-01-07 | 2020-05-19 | Tcl华星光电技术有限公司 | Backlight adjusting method and device and display device |
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Application publication date: 20210226 |