CN116631312B - Display screen detection method and system - Google Patents
Display screen detection method and system Download PDFInfo
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- CN116631312B CN116631312B CN202310758817.4A CN202310758817A CN116631312B CN 116631312 B CN116631312 B CN 116631312B CN 202310758817 A CN202310758817 A CN 202310758817A CN 116631312 B CN116631312 B CN 116631312B
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- 238000001514 detection method Methods 0.000 title claims abstract description 86
- 238000000034 method Methods 0.000 claims abstract description 14
- 238000012216 screening Methods 0.000 claims abstract description 13
- 238000004458 analytical method Methods 0.000 claims description 19
- 238000012545 processing Methods 0.000 claims description 6
- 238000012360 testing method Methods 0.000 claims description 6
- 238000007781 pre-processing Methods 0.000 claims description 4
- 230000008054 signal transmission Effects 0.000 claims description 3
- 238000013507 mapping Methods 0.000 claims 4
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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
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Abstract
The invention discloses a display screen detection method and a system, wherein the method comprises the following steps: s1, sending out a pulse detection signal to a display area to obtain the luminous intensity of each sub-pixel point in the display area; s2, continuously adjusting the intensity of the detection signal, recording the corresponding relation between the intensity of the detection signal and the luminous intensity, and constructing a corresponding table between the intensity of the detection signal and the luminous intensity; s3, screening all the corresponding tables, comparing the corresponding tables with a standard corresponding table, and when the two tables are not matched, marking sub-pixel points matched with the corresponding table as 'to-be-measured points', and if the two tables are matched, obtaining 'bright spots'; s4, comparing the 'to-be-detected point' with the 'bright point', and if the ratio of the 'to-be-detected point' to the 'bright point' meets the threshold, enabling the display screen to meet the standard. And determining coordinates of the sub-pixel points in the display area, and constructing a display corresponding table of the sub-pixel points, so that the sub-pixel points meeting the requirements are obtained through screening, and finally, whether the display screen meets the standard is judged.
Description
Technical Field
The invention relates to the technical field of display screens, in particular to a display screen detection method and a display screen detection system.
Background
With the rapid development of global digitization and informatization, display screens are increasingly widely applied, various display products are layered endlessly, and display terminals such as color televisions, computers and mobile phones have great demands. The display industry is developing to the large screen, and large-size display products such as laser televisions, projectors and the like are also getting popular in the market, and sales volume is continuously increasing. In order to reduce interference of ambient light on the picture effect, a laser television or projector often needs to add a display product material to enhance the contrast and color saturation of the picture.
At present, brightness and visual angle detection in the production process of display products is mainly manual measurement, wherein the operation of the most core is to manually move a tripod for supporting a data acquisition and analysis instrument to a mark point planned in advance on the ground for data acquisition after the display products are placed at a designated position. The manual measurement efficiency is low, and the angle of the measurement equipment needs to be adjusted and measurement data is recorded after the measurement equipment moves in place; manual measurement can only realize a small number of spot checks, and the workload can be increased when the measurement density is high, so how to realize automatic detection is a current difficult problem.
Disclosure of Invention
Aiming at the defects in the technology, the invention provides a display screen detection method and a system, which are used for determining coordinates of sub-pixel points in a display area and constructing a display correspondence table of the sub-pixel points at the same time, so as to screen and obtain sub-pixel points meeting the requirements and finally judge whether the display screen meets the standard.
In order to achieve the above object, the present invention provides a display screen detection method, comprising the following steps:
S1, sending out a pulse detection signal to a display area to obtain the luminous intensity of each sub-pixel point in the display area;
S2, continuously adjusting the intensity of the detection signal, recording the corresponding relation between the intensity of the detection signal and the luminous intensity, and constructing a corresponding table between the intensity of the detection signal and the luminous intensity;
S3, screening all the corresponding tables, comparing the corresponding tables with a standard corresponding table, and when the two tables are not matched, marking sub-pixel points matched with the corresponding table as 'to-be-measured points', and if the two tables are matched, obtaining 'bright spots'; s4, comparing the 'to-be-detected point' with the 'bright point', and if the ratio of the 'to-be-detected point' to the 'bright point' meets the threshold, enabling the display screen to meet the standard.
Preferably, before the pulse signal is sent to the display area, the method further comprises the steps of carrying out area correspondence on the display area, firstly sending a pretreatment signal to the display area, carrying out signal splitting in the sub-display area, transmitting the signal to each sub-pixel point in the sub-display area, and establishing a corresponding relation with the sub-pixel points.
Preferably, after the correspondence is obtained, an actual display area formed by the sub-pixel points is constructed, and the display area is compared with the actual display area, so that the correspondence between the display duty ratio and the coordinates of the display area is obtained.
Preferably, after sending out the pulse detection signal, the pulse signal is firstly divided uniformly according to the corresponding relation, so that the pulse signals obtained by all the sub-pixel points are completely consistent, the luminous brightness of the sub-pixel points is detected, and when the brightness sent out by the sub-pixel points is inconsistent, the corresponding coordinates of the sub-pixel points are recorded and marked as 'to-be-detected points'.
Preferably, the sub-pixel point where the 'point to be detected' is located is subjected to pulse signal enhancement processing, the luminous brightness under different signal intensities is recorded, a second corresponding table of the pulse signal and the luminous intensity is constructed, the second corresponding table is compared with the standard corresponding table, and whether the two are identical is judged.
The invention also discloses a display screen detection system, which comprises a signal module, a detection module and an analysis module, wherein the signal module, the detection module and the analysis module are mutually connected and are electrically connected with a display area of a display screen, the signal module sends out pulse detection signals to the display area, the detection module obtains the luminous intensity of each sub-pixel point in the display area, meanwhile, the signal module continuously adjusts the intensity of the detection signals, the analysis module records the corresponding relation between the intensity of the detection signals and the luminous intensity, builds a corresponding table between the intensity and the luminous intensity, the analysis module screens all the corresponding tables and compares the corresponding tables with a standard corresponding table, and when the intensity and the luminous intensity are not matched, the sub-pixel points matched with the corresponding table are marked as dark points, and if the intensity and the luminous intensity are matched, the sub-pixel points are bright points.
Preferably, the display device further comprises a dividing module, wherein the signal module is used for carrying out area correspondence by utilizing the display area of the dividing module before sending the pulse signal to the display area, firstly, the dividing module is used for sending a preprocessing signal to the display area, carrying out signal splitting in the display area, transmitting the signal to each sub-pixel point in the display area, and establishing a corresponding relation with the sub-pixel points.
Preferably, after obtaining the correspondence, the analysis module constructs an actual display area formed by the sub-pixel points, compares the display area with the actual display area, and obtains the correspondence between the display duty ratio and coordinates of the display area.
Preferably, after the signal module sends out the pulse detection signal, the dividing module equally divides the pulse signal according to the corresponding relation, so that the pulse signals obtained by all the sub-pixel points are completely consistent, the detection module detects the luminous brightness of the sub-pixel points, and when the brightness sent out by the sub-pixel points is inconsistent, the corresponding coordinates of the sub-pixel points are recorded and recorded as 'to-be-detected points'.
Preferably, the signal module performs pulse signal enhancement processing on the sub-pixel point where the 'to-be-measured point' is located, the analysis module records the luminous brightness under different signal intensities, simultaneously builds a second corresponding table of the pulse signal and the luminous intensity, and compares the second corresponding table with the standard corresponding table to judge whether the two are identical.
The beneficial effects of the invention are as follows: compared with the prior art, the display screen detection method and system provided by the invention have the advantages that firstly, the sub-pixel points capable of emitting light in the display area are screened, the sub-pixel points capable of carrying out subsequent tests are screened in the early stage, and secondly, the sub-pixel points capable of carrying out the subsequent tests are subjected to coordinate correspondence, so that the sub-pixel points which are obtained in the subsequent tests and do not meet the standard can be accurately positioned, and in the test process, whether the pixel points meet the requirements is judged by utilizing comparison with the standard correspondence table.
Drawings
FIG. 1 is a flow chart of the steps of the present invention.
Detailed Description
The application will be further described with reference to the accompanying drawings for the sake of clarity, although the scope of the application is not limited thereto, and simple alternatives to those skilled in the art without undue burden are within the scope of the application.
Referring to fig. 1, the invention discloses a display screen detection method, which comprises the following steps:
S1, sending out a pulse detection signal to a display area to obtain the luminous intensity of each sub-pixel point in the display area; s2, continuously adjusting the intensity of the detection signal, recording the corresponding relation between the intensity of the detection signal and the luminous intensity, and constructing a corresponding table between the intensity of the detection signal and the luminous intensity; and S3, screening all the corresponding tables, comparing the corresponding tables with the standard corresponding table, and marking sub-pixel points matched with the corresponding table as 'to-be-measured points' when the two tables are not matched, and judging the sub-pixel points as 'bright spots' when the two tables are matched. S4, comparing the 'to-be-detected point' with the 'bright point', and if the ratio of the 'to-be-detected point' to the 'bright point' meets the threshold, enabling the display screen to meet the standard. In the specific implementation process, the display screen is formed by arranging a plurality of sub-pixel points according to an array, and the display screen is detected, and the essence of the detection method is that the sub-pixel points are overhauled and detected, each pixel point is connected with external equipment through a wire in the use process, so that the pixel points can be detected by using the wires.
In order to achieve the above purpose, before sending the pulse signal to the display area, the method further comprises the steps of performing area correspondence on the display area, firstly sending a preprocessing signal to the display area, performing signal splitting in the sub-display area, transmitting the signal to each sub-pixel point in the sub-display area, and establishing a corresponding relation with the sub-pixel points; after the corresponding relation is obtained, an actual display area formed by the sub-pixel points is constructed, the display area is compared with the actual display area, and the corresponding relation between the display duty ratio and the coordinates of the display area is obtained. In this embodiment, the screening is performed on the pixels, only the sub-pixels capable of working meet the requirement, in the screening process, if the connection wire is disconnected or the sub-pixels are damaged, the sub-pixels cannot work, so that the light cannot be emitted, and the purpose of performing the primary screening is to judge whether the display screen needs to perform subsequent detection, because in the display screen industry, it is impossible to ensure that all the sub-pixels on one display screen can work normally, and only the proportion of the sub-pixels incapable of working normally is small, for example, less than 5 sub-pixels in 1000 sub-pixels are damaged (namely "bad pixels"), the display effect of the whole display screen is not affected, and still the sub-pixels can meet the relevant regulation, based on the bad pixels, all the sub-pixels in the corresponding display screen are required to perform subsequent detection, and when the occupied ratio of the "bad pixels" is high, the display screen is not required to perform subsequent detection, and the subsequent detection of the display screen is only capable of performing the subsequent treatment by using the full-size of the sub-pixels; meanwhile, in the process of primary screening, the coordinates of the whole sub-pixel points are set, more specifically, the shape of the display screen is determined firstly, then a two-dimensional coordinate system is built by taking one sub-pixel point on the display screen as the origin of coordinates, after the building is completed, the sub-pixel points are subjected to front signal transmission one by one in a transverse or longitudinal mode, for example, the sub-pixel points with the horizontal coordinates of 1 are subjected to front signal transmission simultaneously, when feedback signals cannot be received, the occurrence of 'bad points' is judged, the coordinates are recorded at this time, repeated operation is continuously carried out, and finally, all the 'bad points' and the coordinates are obtained.
After sending out pulse detection signals, carrying out uniform division on the pulse signals according to the corresponding relation, so that the pulse signals obtained by all the sub-pixel points are completely consistent, detecting the luminous brightness of the sub-pixel points, and recording the corresponding coordinates of the sub-pixel points when the luminous brightness sent by the sub-pixel points is inconsistent, and marking the corresponding coordinates as 'points to be detected'; and carrying out pulse signal enhancement processing on the sub-pixel point where the 'point to be detected' is located, recording the luminous brightness under different signal intensities, constructing a second corresponding table of the pulse signal and the luminous intensity, comparing the second corresponding table with the standard corresponding table, and judging whether the two tables are identical. In this embodiment, when the number of "dead pixels" is lower than the set standard, the subsequent brightness detection needs to be performed on the display screen, so that the situation that the brightness of a single sub-pixel is too high or too low is avoided, since the "dead pixels" are screened before, the transmission of pulse detection signals on the "dead pixels" has no meaning, so that the pulse signals are only transmitted to the sub-pixel points meeting the detection standard, the light emission standards of the sub-pixel points of the display screens of different use scenes are inconsistent, and therefore, the corresponding table of the pixel point light intensity of the display screen needs to be acquired in advance, and the corresponding table is used as the standard corresponding table; detecting the brightness of the rest sub-pixel points, continuously adjusting the intensity of the detection signals, recording the corresponding relation between the intensity of the detection signals and the luminous intensity, and constructing a corresponding table between the intensity of the detection signals and the luminous intensity; then comparing the corresponding table with a standard corresponding table, and considering that the sub-pixel point accords with related regulations when the change curves of the two are completely consistent; if the luminous intensity of a certain sub-pixel point is inconsistent, for example, in the testing process, the luminous intensity of the certain sub-pixel point is weaker, the pixel point is marked as a 'to-be-tested point', and because each sub-pixel point is connected with the detection equipment through a wire, screening is needed at the moment, whether the sub-pixel point is in a problem or the wire is in a problem, for example, the wire is cracked, broken and the like, although the influence on the resistance is smaller, the influence on the transmission function of a signal wire is smaller, the circuit is broken due to aging along with long-time use, and the sub-pixel point is invalid; in order to solve this problem, a pulse detection signal with the same intensity is adopted in the early detection, and if the wire has the above problem, the size of the pulse signal is changed, so that the brightness of the sub-pixel point is changed (although the influence is small, the influence still exists); then, through carrying out independent screening to "waiting measurement point", carry out retest through the pulse detection signal of different intensity and obtain the second corresponding table, if the curve on the second corresponding table is the same with the curve of standard corresponding table, the explanation is that the wire goes wrong, only need change the wire can, if both are different, the explanation is that sub-pixel point goes wrong, after the detection, only need after all "bright spot" with "waiting measurement point" quantity ratio, satisfy the threshold value can pass the detection.
The application also discloses a system for checking the display screen, which comprises a signal module, a detection module and an analysis module, wherein the signal module, the detection module and the analysis module are mutually connected and are electrically connected with a display area of the display screen, the signal module sends out pulse detection signals to the display area, the detection module obtains the luminous intensity of each sub-pixel in the display area, meanwhile, the signal module continuously adjusts the intensity of the detection signals, the analysis module records the corresponding relation between the intensity of the detection signals and the luminous intensity, builds a corresponding table between the intensity and the luminous intensity, the analysis module screens all the corresponding tables and compares the corresponding tables with a standard corresponding table, and when the intensity of the detection signals and the luminous intensity are not matched, the sub-pixel matched with the corresponding table is marked as a dark spot, and if the intensity of the sub-pixel is matched with the corresponding table is a bright spot.
The display device comprises a display area, a dividing module, a signal module and a display module, wherein the display area is used for carrying out area correspondence by the dividing module before sending pulse signals to the display area; after the corresponding relation is obtained, the analysis module constructs an actual display area formed by the sub-pixel points, and compares the display area with the actual display area to obtain the corresponding relation between the display duty ratio and the coordinates of the display area.
After the signal module sends out pulse detection signals, the dividing module equally divides the pulse signals according to the corresponding relation, so that the pulse signals obtained by all the sub-pixel points are completely consistent, the detection module detects the luminous brightness of the sub-pixel points, and when the luminous brightness of the sub-pixel points is inconsistent, the corresponding coordinates of the sub-pixel points are recorded and marked as 'points to be detected'; the signal module carries out pulse signal enhancement processing on the sub-pixel point where the 'to-be-measured point' is located, the analysis module records the luminous brightness under different signal intensities, a second corresponding table of pulse signals and luminous intensity is constructed, the second corresponding table is compared with the standard corresponding table, and whether the two tables are identical is judged.
The above disclosure is only a few specific embodiments of the present invention, but the present invention is not limited thereto, and any changes that can be thought by those skilled in the art should fall within the protection scope of the present invention.
Claims (10)
1. The display screen detection method is characterized by comprising the following steps of:
S1, sending out a pulse detection signal to a display area to obtain the luminous intensity of each sub-pixel point in the display area;
S2, continuously adjusting the intensity of the detection signal, recording the corresponding relation between the intensity of the detection signal and the luminous intensity, and constructing a corresponding table between the intensity of the detection signal and the luminous intensity;
S3, screening all the corresponding tables, setting up coordinates of the whole sub-pixel points in the primary screening process, determining the shape of the display screen, then constructing a two-dimensional coordinate system by taking one sub-pixel point on the display screen as a coordinate origin, after the construction is completed, carrying out signal transmission before the sub-pixel points one by one in a transverse or longitudinal mode, judging that a 'bad point' is encountered when a feedback signal cannot be received, recording the coordinates at the moment, continuously carrying out repeated operation, finally obtaining all the quantity and coordinates of the 'bad point', carrying out subsequent test on the display screen when the quantity of the bad point is lower than a set standard, comparing the corresponding tables of other sub-pixel points except the bad point with a standard corresponding table, and marking the sub-pixel points matched with the corresponding table as 'to-be-measured points' when the two sub-pixel points are not matched, and as 'bright points' when the two sub-pixel points are matched;
S4, comparing the 'to-be-detected point' with the 'bright point', and if the ratio of the 'to-be-detected point' to the 'bright point' meets the threshold, enabling the display screen to meet the standard.
2. The method of claim 1, further comprising, prior to sending the pulse detection signal to the display area, performing area mapping on the display area, first sending a pre-processing signal to the display area, performing signal splitting in the display area, transmitting the signal to each sub-pixel in the display area, and establishing a mapping relationship with the sub-pixel.
3. The display screen detection method according to claim 2, wherein after the correspondence is obtained, an actual display area formed by the sub-pixel points is constructed, and the display area is compared with the actual display area, so as to obtain the correspondence between the display duty ratio and the coordinates of the display area.
4. The method for detecting a display screen according to claim 1, wherein after the pulse detection signals are sent out, the pulse detection signals are firstly divided uniformly according to the corresponding relation, so that the pulse detection signals obtained by all the sub-pixel points are completely consistent, the luminous brightness of the sub-pixel points is detected, and when the brightness sent out by the sub-pixel points is inconsistent, the corresponding coordinates of the sub-pixel points are recorded and recorded as a second to-be-detected point.
5. The method of claim 4, wherein the sub-pixel point where the second point to be measured is located is subjected to pulse detection signal enhancement processing, the light emitting brightness under different signal intensities is recorded, a second correspondence table of pulse detection signals and light emitting intensities is constructed, and the second correspondence table is compared with a standard correspondence table to determine whether the two are identical.
6. The display screen detection system is characterized by comprising a signal module, a detection module and an analysis module, wherein the signal module, the detection module and the analysis module are mutually connected and are electrically connected with a display area of a display screen, the signal module sends pulse detection signals into the display area, the detection module obtains the luminous intensity of each sub-pixel in the display area, meanwhile, the signal module continuously adjusts the intensity of the detection signals, the analysis module records the corresponding relation between the intensity of the detection signals and the luminous intensity, a corresponding table between the two is constructed, the analysis module screens all the corresponding tables, in the process of primary screening, coordinates of the whole sub-pixel are established, the shape of the display screen is determined, then a two-dimensional coordinate system is constructed by taking one sub-pixel on the display screen as an origin of coordinates, after the construction is completed, the sub-pixel points are transmitted one by one in a transverse or longitudinal mode, when a feedback signal cannot be received, the 'bad points' are judged, the coordinates are recorded at the moment, repeated operation is continuously carried out, finally, the quantity and the coordinates of all 'bad points' are obtained, when the quantity of the bad points 'and the quantity of the bad points' are lower than the quantity of the preset than the corresponding points, and the corresponding points are not matched with the two corresponding sub-pixels when the two corresponding tables are matched with the two corresponding sub-pixels, and the two corresponding tables are not matched with the corresponding to the two corresponding sub-pixel tables.
7. The system of claim 6, further comprising a dividing module, wherein the signal module performs area mapping using the dividing module before sending the pulse detection signal to the display area, and wherein the dividing module sends the pre-processing signal to the display area, performs signal splitting in the display area, and transmits the signal to each sub-pixel in the display area, and establishes a mapping relationship with the sub-pixels.
8. The display screen detection system according to claim 7, wherein after the correspondence is obtained, the analysis module constructs an actual display area formed by the sub-pixel points, compares the display area with the actual display area, and obtains a correspondence between a display duty ratio and coordinates of the display area.
9. The system of claim 6, wherein the dividing module divides the pulse detection signals according to the correspondence after the signal module sends the pulse detection signals, so that the pulse detection signals obtained by all the sub-pixel points are completely consistent, the detecting module detects the luminance of the sub-pixel points, and when the luminance sent by the sub-pixel points is inconsistent, the corresponding coordinates of the sub-pixel points are recorded and marked as "to-be-measured points".
10. The system of claim 9, wherein the signal module performs pulse detection signal enhancement processing on a sub-pixel point where the "point to be detected" is located, the analysis module records the luminance of light under different signal intensities, and constructs a second correspondence table of pulse detection signals and luminance intensities, and compares the second correspondence table with the standard correspondence table to determine whether the two are the same.
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