CN110796974A - Display screen detection method - Google Patents
Display screen detection method Download PDFInfo
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- CN110796974A CN110796974A CN201911060664.6A CN201911060664A CN110796974A CN 110796974 A CN110796974 A CN 110796974A CN 201911060664 A CN201911060664 A CN 201911060664A CN 110796974 A CN110796974 A CN 110796974A
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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
- G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
Abstract
The invention discloses a display screen detection method, which comprises the following steps of; accessing a display screen to be detected, uniformly dividing a display area of the display screen to be detected into a plurality of grids, driving the display screen to be detected to display a driving picture, wherein only one color of R, G, B is displayed in each grid, and the color of each grid is different from the color of the grid adjacent to the grid; and observing the abnormal condition of the display area to obtain a detection result. According to the display screen detection method, R, G, B three colors are integrated into one test picture, pure-color full-screen detection is not required to be performed on each color, a detection result can be obtained, the working efficiency is improved, the detection time is saved, visual fatigue is avoided for detection personnel, and the detection accuracy is improved.
Description
Technical Field
The invention relates to the technical field of liquid crystal display, in particular to a display screen detection method.
Background
In the prior art, when a liquid crystal display panel is detected, software is generally used to drive R, G, B respectively to perform pure color display to drive horizontal line pixel arrays and vertical line pixel array switches, so as to detect whether there is an undisplayed pixel array or a pixel array displaying other colors under a pure color picture to determine whether each driving horizontal line or vertical line pixel array is short-circuited. However, the existing detection method has the following problems: in the detection process, pure R, pure G and pure B pictures need to be sequentially displayed to respectively confirm whether each picture has poor scratch; the detection personnel need prepare 3 test pictures and detect each pure color picture respectively, the detection time is relatively increased, and the repetitive test process easily causes the visual fatigue of the detection personnel and generates detection errors.
Disclosure of Invention
In order to solve the technical problems, the invention provides a display screen detection method, wherein R, G, B three colors are integrated in a test picture, and whether MOS short circuit, pixel array line disconnection or adjacent line short circuit exists in a horizontal line pixel array and a vertical line pixel array of each color is obtained by detecting the test picture.
The technical scheme of the invention is as follows: the invention provides a display screen detection method, which comprises the following steps:
accessing a display screen to be detected, uniformly dividing a display area of the display screen to be detected into a plurality of grids, driving the display screen to be detected to display a driving picture, wherein only one color of R, G, B is displayed in each grid, and the color of each grid is different from the color of the grid adjacent to the grid;
and observing the abnormal condition of the display area to obtain a detection result.
Further, the display area of the display screen to be detected is evenly divided into 9 grids, and the display area is displayed as a nine-square grid.
Further, when the display area is divided by the nine-square grid, the color displayed by each grid is as follows:
R、G、B；
G、B、R；
B、R、G。
further, the abnormal condition of the display area is observed to judge whether the following phenomena occur in each pixel: MOS short, pixel array line open, or adjacent line short.
Further, the MOS short circuit is determined as: the grid is provided with lines with different colors from the color to be displayed by the grid.
Further, the open circuit of the pixel array line is judged as follows: the grid is provided with at least one line which is not bright.
Further, the adjacent line short circuit is judged as follows: the grid is provided with a line which combines the color to be displayed by the grid and at least one of the other two colors.
By adopting the scheme, the display screen detection method disclosed by the invention has the advantages that the display area of the display screen to be detected is uniformly divided into a plurality of grids, only one color of R, G, B is displayed in each grid, and the color displayed in each grid is different from the color displayed in the adjacent grid, so that the pixel array line of the pixel in each grid is detected, and the pixel array problem of the display screen is judged. According to the detection method, R, G, B three colors are concentrated in one test picture, and a detection result can be obtained without carrying out pure full-screen detection on each color, so that the working efficiency is improved, the detection time is saved, visual fatigue is avoided for detection personnel, and the detection accuracy is improved.
Drawings
Fig. 1 is a schematic diagram of a display screen detection method in a preferred embodiment of the present invention.
Detailed Description
The invention is described in detail below with reference to the figures and the specific embodiments.
The invention provides a display screen detection method, which comprises the following steps:
step 1, accessing a display screen to be detected, namely accessing the display screen to be detected into a test host or a test fixture, operating on the host or the test fixture to uniformly divide a display area of the display screen to be detected into a plurality of grids, driving the display screen to be detected to display a driving picture, wherein only one color of R, G, B is displayed in each grid, and the color of each grid is different from the color of the grid adjacent to the grid, so that R, G, B three colors are integrated in one test picture, R pixels are lightened in each vertical pixel array, and R pixels are lightened in each horizontal pixel array; similarly, G pixels are lighted in each vertical pixel array, and G pixels are lighted in each horizontal pixel array; and B pixels are lightened in each vertical pixel array, and B pixels are lightened in each horizontal pixel array. Therefore, whether the pixel array of the color in the strip of pixel array has defects or not can be judged according to the display condition of the horizontal pixel array and the vertical pixel array of each color.
And 2, observing the abnormal condition of the display area to obtain a detection result. Observing the abnormal condition of the display area comprises observing the horizontal line pixel array and the vertical line pixel array of each color in R, G, B to judge MOS short circuit, open circuit of pixel array lines or short circuit of adjacent lines. The MOS short circuit is judged as follows: the grid is provided with lines with different colors from the color to be displayed by the grid. The open circuit of the pixel array line is judged as follows: the grid is provided with at least one line which is not bright. And the adjacent line short circuit is judged as follows: the grid is provided with a line which combines the color to be displayed by the grid and at least one of the other two colors. Correspondingly, the detection result comprises: MOS shorts, pixel array line opens, and adjacent line shorts.
In an optimal embodiment, the test picture is uniformly divided into 9 grids with the same size, namely a structure of a nine-square grid, specifically, one grid display R is arranged in each transverse three grids, and one grid display R is also arranged in each longitudinal three grids; similarly, one grid display G is arranged in each transverse three grids, and one grid display G is also arranged in each longitudinal three grids; one lattice display B is arranged in each transverse three lattices, and one lattice display B is also arranged in each longitudinal three lattices. It is worth mentioning that compared with other embodiments, the optimal embodiment can avoid the condition of dazzling caused by excessive attention of detection personnel to display grids with different colors, and further improves the detection accuracy.
As shown in FIG. 1, in one of the most preferred embodiments, red is displayed in ①, ⑥ and ⑧ cells, green is displayed in ②, ④ and ⑨ cells, and blue is displayed in ③, ⑤ and ⑦ cells.
①, ⑥ and ⑥ 13 grid combinations can complete the opening of the R pixel array in the horizontal direction and the vertical direction, and realize the detection function which can be carried out by the traditional pure red image display, namely, the MOS short circuit, the pixel array line disconnection and the adjacent line short circuit of the red pixel array, concretely, if a blue or green line appears in ①, ⑥ 0 and ⑧ grids, the blue or green line cannot be normally closed, MOS breakdown exists at the blue or green line display position, if at least one red line which is not bright exists in ①, ⑥ and ⑧ grids, the pixel array line disconnection exists at the non-bright position, if a red and green or red and blue combined line appears in ①, ⑥ and ⑧ grids, and the brightness of the combined line is about half of the brightness of the normal red pixel array, the adjacent line short circuit exists at the combined line.
Similarly, ②, ④ and ④ 13 grid combinations can complete the complete opening of the G pixel array in the horizontal direction and the vertical direction, and realize the detection function which can be performed by the traditional pure green image display, namely, the MOS short circuit, the pixel array line disconnection and the adjacent line short circuit of the green pixel array, specifically, if a blue or red line appears in ②, ④ 0 and ⑨ grids, the blue or red line cannot be normally closed, MOS breakdown exists at the blue or red line display position, if at least one green line which is not bright exists in ②, ④ and ⑨ grids, the pixel array line disconnection exists at the non-bright position, and if a green and blue or green and red combined line appears in ②, ④ and ⑨ grids, and the brightness of the combined line is about half of the brightness of the normal green pixel array, the adjacent line short circuit exists at the combined line position.
Similarly, ③, ⑤ and ⑤ 13 grid combinations can complete the complete opening of the B pixel array in the horizontal direction and the vertical direction, and realize the detection function which can be performed by the traditional pure blue picture display, namely, the MOS short circuit, the pixel array line disconnection and the adjacent line short circuit of the blue pixel array, specifically, if a red or green line appears in ③, ⑤ 0 and ⑦ grids, the red or green line cannot be normally closed, MOS breakdown exists at the red or green line display position, if at least one non-bright blue line appears in ③, ⑤ and ⑦ grids, the pixel array line disconnection exists at the non-bright position, and if blue and green or blue and red combined lines appear in ③, ⑤ and ⑦ grids, and the brightness of the combined line is about half of the brightness of the normal blue pixel array, the adjacent line short circuit exists at the combined line.
Similar to the above embodiments, the same technical effects of the above embodiments can be achieved by setting ①, ⑤, and ⑨ lattices to red, ②, ④, and ⑧ lattices to blue, and ③, ⑥, and ⑦ lattices to green, and so on, in 9 different combinations, which are not repeated herein.
In summary, the present invention provides a method for detecting a display screen, wherein R, G, B colors are concentrated in a test picture of a display area, and an abnormal condition of the display area is observed to determine whether there is a MOS short circuit, a pixel array line open circuit, or an adjacent line short circuit in a horizontal line pixel array or a vertical line pixel array of each color.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A display screen detection method is characterized by comprising the following steps:
accessing a display screen to be detected, uniformly dividing a display area of the display screen to be detected into a plurality of grids, driving the display screen to be detected to display a driving picture, wherein only one color of R, G, B is displayed in each grid, and the color of each grid is different from the color of the grid adjacent to the grid;
and observing the abnormal condition of the display area to obtain a detection result.
2. The display screen detection method according to claim 1, wherein a display area of the display screen to be detected is evenly divided into 9 cells, and the display area is displayed as a nine-square cell.
3. The display screen detection method according to claim 2, wherein when the display area is divided into nine-square grids, the colors displayed by the grids are:
R、G、B；
G、B、R；
B、R、G。
4. the display screen detection method of claim 1, wherein the abnormal condition of the display area is observed to determine whether the following phenomena occur in each pixel: MOS short, pixel array line open, or adjacent line short.
5. The display screen detection method of claim 4, wherein the MOS short circuit judgment is that: the grid is provided with lines with different colors from the color to be displayed by the grid.
6. The display screen detection method of claim 4, wherein the pixel array line open is determined as: the grid is provided with at least one line which is not bright.
7. The display screen detection method of claim 4, wherein the adjacent line short circuit judgment is: the grid is provided with a line which combines the color to be displayed by the grid and at least one of the other two colors.
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| CN201911060664.6A CN110796974A (en) | 2019-11-01 | 2019-11-01 | Display screen detection method |
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2019
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Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000023177A (en) * | 1998-07-07 | 2000-01-21 | Toshiba Corp | Beam index display device |
| CN103310752A (en) * | 2013-06-05 | 2013-09-18 | 合肥京东方光电科技有限公司 | Gamma voltage adjusting method and gamma voltage adjusting system |
| CN104749801A (en) * | 2013-12-31 | 2015-07-01 | 研祥智能科技股份有限公司 | High-precision automatic optical detection method and high-precision automatic optical detection system |
| US20160225343A1 (en) * | 2015-02-04 | 2016-08-04 | Sony Corporation | Switchable privacy mode display |
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