CN111855149B - Display panel ghost shadow testing method and device and computer equipment - Google Patents
Display panel ghost shadow testing method and device and computer equipment Download PDFInfo
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- G01M11/0257—Testing optical properties by measuring geometrical properties or aberrations by analyzing the image formed by the object to be tested
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- G—PHYSICS
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- G01J1/00—Photometry, e.g. photographic exposure meter
Abstract
The application relates to a method and a device for testing the residual image of a display panel and computer equipment. When the test picture is displayed on the display panel, the area of the display panel corresponding to the test picture is a brightness monitoring area, and then the display panel is controlled to display the reference picture, the test picture and the reference picture in sequence. And when the display panel displays the reference picture for the first time, acquiring an initial brightness value in the brightness monitoring area. And when the display panel displays the reference picture for the second time, acquiring a plurality of test brightness values in the brightness monitoring area at intervals of preset time length. And finally, judging the ghost level of the display panel according to the initial brightness value, the test brightness value and the preset time length.
Description
Technical Field
The present application relates to the field of display technologies, and in particular, to a method and an apparatus for testing a residual image of a display panel, and a computer device.
Background
In the display field, no matter an OLED display screen or a liquid crystal display screen, the phenomenon of ghost shadow is easy to generate when the OLED display screen or the liquid crystal display screen stays on one picture for a long time.
The existing method for judging residual shadow is mainly visual judgment by human eyes. The level of the ghost is judged by training technicians to memorize pictures with different test result levels, the method has high requirements on the capability of the technicians, and the human eyes visually confirm that inevitable visual differences exist, so that the standards of different personnel are difficult to be completely unified. This results in the possibility of differences in the results of different technicians at different times in the same picture. This affects the determination of the severity of the afterimage.
Disclosure of Invention
In view of the foregoing, it is desirable to provide a method, an apparatus and a computer device for testing image sticking of a display panel.
A method for testing the afterimage of a display panel comprises the following steps:
providing a reference picture and a test picture with the same gray level, wherein the test picture comprises a test pattern, and when a display panel displays the test picture, the area of the display panel corresponding to the test pattern is a brightness monitoring area;
controlling the display panel to display the reference picture, the test picture and the reference picture in sequence, acquiring an initial brightness value in the brightness monitoring area when the display panel displays the reference picture for the first time, and acquiring a plurality of test brightness values in the brightness monitoring area at intervals of a preset time length when the display panel displays the reference picture for the second time;
and judging the ghost level of the display panel according to the initial brightness value, the test brightness value and the preset time length.
In one embodiment, the controlling the display panel to display and sequentially display the reference picture, the test picture, and the reference picture, acquiring an initial brightness value in the brightness monitoring area when the display panel displays the reference picture for the first time, and acquiring a plurality of test brightness values in the brightness monitoring area every preset time interval when the display panel displays the reference picture for the second time includes:
controlling the display panel to display the reference picture in a first preset time length, and collecting the initial brightness value of the brightness monitoring area;
controlling the display panel to display the test picture in a second preset time length;
controlling the display panel to display the reference picture, and collecting a plurality of test brightness values in the brightness monitoring area at intervals of a third preset time length;
the first preset time length and the second preset time length are greater than the third preset time length.
In an embodiment, the determining the level of the afterimage of the display panel according to the initial brightness value, the test brightness value and the preset time length includes:
obtaining a plurality of brightness variation quantities of the brightness monitoring area according to the ratio of the difference between each test brightness value and the initial brightness value to the initial brightness value;
and when the brightness variation is not greater than a brightness variation preset value, judging the ghost level of the display panel according to the time for collecting the test brightness value corresponding to the brightness variation.
In one embodiment, the test pattern is a circular area.
In one embodiment, the test picture comprises a first test picture and a second test picture, the test patterns comprise a first test pattern and a second test pattern, the first test picture comprises the first test pattern, the second test picture comprises the second test pattern, the color of the first test pattern is different from the color of the second test pattern, the initial brightness value comprises a first initial brightness value and a second initial brightness value, and the test brightness value comprises a first test brightness value and a second test brightness value;
the brightness monitoring area comprises a first brightness monitoring area and a second brightness monitoring area, when the display panel displays the first test picture, the area of the display panel corresponding to the first test picture is the first brightness monitoring area, when the display panel displays the second test picture, the area of the display panel corresponding to the second test picture is the second brightness monitoring area, and the first brightness monitoring area and the second brightness monitoring area are arranged at intervals; the controlling the display panel to display the reference picture, the test picture and the reference picture in sequence, acquiring an initial brightness value in the brightness monitoring area when the display panel displays the reference picture for the first time, and acquiring a plurality of test brightness values in the brightness monitoring area at intervals of a preset time length when the display panel displays the reference picture for the second time includes:
controlling the display panel to display the reference picture, the first test picture and the reference picture in sequence, collecting the first initial brightness value in the first brightness monitoring area when the display panel displays the reference picture for the first time, and collecting a plurality of first test brightness values in the first brightness monitoring area at intervals of the preset time length when the display panel displays the reference picture for the second time;
and controlling the display panel to sequentially display the reference picture, the second test picture and the reference picture, acquiring a second initial brightness value in the second brightness monitoring area when the display panel displays the reference picture for the third time, and acquiring a plurality of second test brightness values in the second brightness monitoring area at intervals of the preset time length when the display panel displays the reference picture for the fourth time.
In one embodiment, the first test pattern is a black circular area and the second test pattern is a white circular area.
In one embodiment, when the first test picture and the second test picture coincide, the first test pattern and the second test pattern are located on the same horizontal line.
A display panel ghost testing device comprises:
the detection device is used for being connected with a display panel and controlling the display panel to display a reference picture, a test picture and the reference picture in sequence, wherein the gray scales of the reference picture and the test picture are the same, the test picture comprises a test pattern, and when the display panel displays the test picture, the area of the display panel corresponding to the test pattern is a brightness monitoring area;
the optical test probe is used for collecting an initial brightness value in the brightness monitoring area when the display panel displays the reference picture for the first time, and collecting a plurality of test brightness values in the brightness monitoring area at intervals of preset time length when the display panel displays the reference picture for the second time;
and the control device is connected with the optical test probe and used for judging the residual image level of the display panel according to the initial brightness value, the test brightness value and the preset time length.
In one embodiment, the diameter of the optical test probe is smaller than the diameter of the test pattern.
A computer device comprising a memory storing a computer program and a processor implementing the steps of the method when executing the computer program.
According to the method, the device and the computer equipment for testing the residual image of the display panel, a reference picture and a test picture with the same gray level are provided at first. When the test picture is displayed on the display panel, the area of the display panel corresponding to the test picture is a brightness monitoring area, and then the display panel is controlled to display the reference picture, the test picture and the reference picture in sequence. And when the display panel displays the reference picture for the first time, acquiring an initial brightness value in the brightness monitoring area. And when the display panel displays the reference picture for the second time, acquiring a plurality of test brightness values in the brightness monitoring area at intervals of preset time length. And finally, judging the ghost level of the display panel according to the initial brightness value, the test brightness value and the preset time length. Therefore, the residual image judgment standard of the display panel is objective and uniform, the error identified by human eyes is avoided, and the severity of the residual image of the display panel can be effectively identified.
Drawings
FIG. 1 is a schematic flow chart illustrating a method for testing image sticking of a display panel according to another embodiment;
FIG. 2 is a schematic flow chart illustrating a method for testing image sticking of a display panel according to another embodiment;
FIG. 3 is a schematic flow chart illustrating a method for testing image sticking of a display panel according to another embodiment;
FIG. 4 is a flowchart illustrating an exemplary method for testing image sticking of a display panel;
FIG. 5 is a diagram illustrating an embodiment of a method for testing image sticking on a display panel;
FIG. 6 is a diagram illustrating an exemplary embodiment of an apparatus for testing image sticking on a display panel;
FIG. 7 is a diagram illustrating an internal structure of a computer device according to an embodiment.
Description of reference numerals:
display panel ghost testing device 10
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
Referring to fig. 1, an embodiment of the present application provides a method for testing a residual image of a display panel. The method comprises the following steps:
s10, providing a reference picture and a test picture with the same gray scale, wherein the test picture comprises a test pattern, and when a display panel displays the test picture, the area of the display panel corresponding to the test pattern is a brightness monitoring area;
s20, controlling the display panel to display the reference picture, the test picture and the reference picture in sequence, collecting an initial brightness value in the brightness monitoring area when the display panel displays the reference picture for the first time, and collecting a plurality of test brightness values in the brightness monitoring area at intervals of a preset time length when the display panel displays the reference picture for the second time;
and S30, judging the ghost level of the display panel according to the initial brightness value, the test brightness value and the preset time length.
In one embodiment, the reference frame and the test frame may be 125 gray scale to 128 gray scale. In one embodiment, the reference picture and the test picture may be a pure 128 gray scale. The 128 gray level is the standard gray level of the visual residual shadow.
The reference picture is a pure color picture, and the test picture comprises a test pattern. The test pattern may be positioned in the middle of the test screen. The shape of the test pattern may be a circle, a polygon or other irregular pattern. The color of the test pattern is different from the colors of other positions of the test picture.
In one embodiment, the color of the other position of the test picture may be gray, and the color of the test pattern may be black or white.
When the display panel displays the test picture, the test pattern is displayed in a specific area on the display panel. The specific area is the brightness monitoring area. The brightness monitoring area is a fixed position of the display area of the display panel.
When the display panel displays the reference picture, the reference picture also has an area corresponding to the brightness monitoring area on the display panel.
In S20, the display panel may be configured to display the reference picture in a first time period, switch to the test picture in a second time period, and switch to the reference picture in a third time period. The lengths of the first, second, and third time periods may be different. And after the reference picture is stably displayed in a first time period, acquiring an initial brightness value of the brightness monitoring area, and then switching to the test picture. It can be understood that, since the reference picture is a pure color, the test pattern displayed on the brightness monitoring area by the display panel changes its original display state after the reference picture is switched to the test picture. Due to the luminescent material luminescence decay properties, a ghost image may be left in the brightness monitoring zone during the second period of time. And then switching the display panel to the reference picture, wherein the brightness of the brightness monitoring area can be changed due to the afterimage in the brightness monitoring area. And at the moment, the test brightness value of the brightness monitoring area can be acquired.
It can be understood that when the reference picture is displayed for the second time, the test brightness value of the brightness monitoring area is collected once at the same preset time interval, so that a plurality of test brightness values are obtained.
In S30, each time the test brightness value is collected, a time point is corresponding to the test brightness value. The time point may be the last moment of each of the preset time lengths. Therefore, the brightness variation of the brightness monitoring area can be obtained by comparing the test brightness value with the initial brightness value. It can be understood that, when the luminance variation is smaller and the corresponding time is shorter, the speed of eliminating the afterimage of the display panel is faster, and the degree of afterimage of the display panel is smaller, so that the quality is higher. It may be set that when the luminance variation is smaller than a threshold value within a set time period, the afterimage level of the display panel is considered to be low. When the variation of the brightness value is greater than the threshold for a set time period, the afterimage level of the display panel may be considered to be higher.
The method for testing the residual image of the display panel, provided by the embodiment of the application, comprises the steps of firstly providing a reference picture and a test picture with the same gray level. When the test picture is displayed on the display panel, the area of the display panel corresponding to the test picture is a brightness monitoring area, and then the display panel is controlled to display the reference picture, the test picture and the reference picture in sequence. And when the display panel displays the reference picture for the first time, acquiring an initial brightness value in the brightness monitoring area. And when the display panel displays the reference picture for the second time, acquiring a plurality of test brightness values in the brightness monitoring area at intervals of preset time length. And finally, judging the ghost level of the display panel according to the initial brightness value, the test brightness value and the preset time length. Therefore, the residual image judgment standard of the display panel is objective and uniform, the error identified by human eyes is avoided, and the severity of the residual image of the display panel can be effectively identified.
Referring to fig. 2, in one embodiment, the S20 includes:
s21, controlling the display panel to display the reference picture in a first preset time length, and collecting the initial brightness value of the brightness monitoring area;
s22, controlling the display panel to display the test picture in a second preset time length;
s23, controlling the display panel to display the reference picture, and collecting a plurality of test brightness values in the brightness monitoring area at intervals of a third preset time length;
the first preset time length and the second preset time length are greater than the third preset time length.
In S21, the time for which the reference picture is displayed on the display panel is controlled to be the first preset time length. The initial luminance value Lv0 of the luminance monitoring region may be acquired at a time before the reference picture is switched to the test picture. In one embodiment, the first preset length of time may be 5 minutes to 15 minutes. Further, the first preset time period may be 10 minutes. And in the first preset time length, the display panel can reach a stable state.
In S22, the display panel switches to the test picture after the display of the reference picture reaches the first preset time duration. And keeping the display panel to display the test picture within a second preset time length. It is understood that the second predetermined length of time may be 5 minutes to 15 minutes. Further, the second preset time period may be 10 minutes. And the display aging of the display panel can be enabled to reach a stable state within the second preset time length, so that the phenomenon of ghost shadow in a brightness monitoring area on the display panel is ensured when a display picture is switched.
In S23, when the test picture is displayed by the display panel for the second preset time period, the display panel switches to the reference picture, and sequentially collects a plurality of test brightness values Lv1 and Lv2 … … Lvn in the brightness monitoring region at intervals of a third preset time period according to a time sequence. Wherein n is a positive integer.
The first preset time length and the second preset time length are greater than the third preset time length. Therefore, the first preset time length and the second preset time length are longer, so that the display panel can reach a stable state. The method can ensure that the brightness monitoring area on the display panel has the afterimage phenomenon when the test picture is switched to the reference picture. The third preset time length is shorter, the frequency of collecting the test brightness value can be improved, more data are obtained, and the precision of judging the ghost degree of the display panel can be improved.
Referring to fig. 3, in an embodiment, the S30 includes:
s310, obtaining a plurality of brightness variation quantities of the brightness monitoring area according to the ratio of the difference between each test brightness value and the initial brightness value to the initial brightness value;
and S320, when the brightness variation is not greater than a brightness variation preset value, judging the ghost level of the display panel according to the time for collecting the test brightness value corresponding to the calculated brightness variation.
In S310, differences Lvn to Lv0 may be respectively made between the plurality of test brightness values Lv1 and Lv2 … … Lvn and the initial brightness value Lv0, and then ratios are respectively made between the plurality of test brightness values Lv1 and Lv2 … … Lvn and the corresponding test brightness value Lvn, so as to obtain (Lvn to Lv0) × 100%/Lvn, which is the brightness variation Ln.
In S320, it can be understood that after the display image of the display panel is switched to the reference image, the residual image gradually disappears with time, and when the residual image disappears to a certain extent, that is, when the luminance variation is not greater than the luminance variation preset value, it can be considered that the viewing screen is not affected at this time. On the basis, the corresponding time of the test brightness value used when the brightness variation is calculated is further judged when the brightness variation is not larger than the brightness variation preset value. When the length of the time is less than a set fixed value, the rate of eliminating the afterimage of the display panel is considered to be faster, so that the afterimage level of the display panel can be judged to be lower.
In one embodiment, the test pattern is a circular area. It can be understood that since the circle has no directivity, it is possible to avoid affecting the accuracy of measurement due to the test pattern having a difference in directivity.
In one embodiment, the test screens include a first test screen 220 and a second test screen 230. The test patterns include a first test pattern 221 and a second test pattern 231. The first test screen 220 includes the first test pattern 221. The second test screen 230 includes the second test pattern 231. The first test pattern 221 and the second test pattern 231 have different colors. The initial luminance values include a first initial luminance value and a second initial luminance value. The test brightness values include a first test brightness value and a second test brightness value.
The brightness monitoring region includes a first brightness monitoring region and a second brightness monitoring region. When the display panel displays the first test picture 220, the area of the display panel corresponding to the first test pattern 221 is the first brightness monitoring area. When the display panel displays the second test picture 230, the area of the display panel corresponding to the second test pattern 231 is the second brightness monitoring area. The first brightness monitoring area and the second brightness monitoring area are arranged at intervals. Referring to fig. 4 and 5, the S20 includes:
s210, controlling the display panel to sequentially display the reference picture 210, the first test picture 220, and the reference picture 210. When the display panel displays the reference picture 210 for the first time, the first initial brightness value is collected in the first brightness monitoring area. When the display panel displays the reference frame 210 for the second time, a plurality of first test brightness values are collected in the first brightness monitoring area at intervals of the preset time length.
S220, controlling the display panel to sequentially display the reference picture 210, the second test picture 230, and the reference picture 210. When the display panel displays the reference picture 210 for the third time, the second initial brightness value is collected in the second brightness monitoring area. When the display panel displays the reference frame 210 for the fourth time, a plurality of second test brightness values are collected in the second brightness monitoring area at intervals of the preset time length.
It is to be understood that the first test screen and the second test screen may be the same size.
The color of the first test pattern is different from the color of the second test pattern, so that the ghost level of the display panel can be judged from two different dimensions. The first test pattern and the second test pattern may be identical in shape and size. Therefore, single variable in the test process can be ensured, and interference of other factors on the measurement result is avoided.
The first brightness monitoring area and the second brightness monitoring area are arranged at intervals, namely, the first brightness monitoring area and the second brightness monitoring area are not overlapped. Therefore, the mutual influence of the afterimages generated by the display panel displaying the first test pattern and the second test pattern can be avoided. After the first test pattern is tested, the second test pattern can be directly tested, and the time for waiting for the disappearance of the residual shadow caused by the first test pattern can be reduced.
In one embodiment, when the first test picture and the second test picture are overlapped, the first test pattern and the second test pattern are located on the same horizontal line. Therefore, it is possible to ensure the interference due to the uneven brightness attenuation at the upper and lower positions of the display panel.
It is to be understood that in S210, the time lengths of the display panel sequentially displaying the reference picture and the first test picture may be the first preset time length and the second preset time length, respectively. And in the first preset time span, the display panel displays that the reference picture can reach a stable state. And in the second preset time length, the display panel displays that the first test pattern can reach a stable state, so that the phenomenon of ghost shadow in a brightness monitoring area on the display panel is ensured when the display screen is switched.
Based on the same principle as the above embodiment, a plurality of luminance variation amounts of the luminance monitoring region when the first test pattern is used may be calculated based on the first initial luminance value, the first test luminance value, and the preset time length. And further judging the ghost level of the display panel when the display panel displays the first test pattern.
In S220, after the first test brightness value is collected, the optical test probe may be moved to move the optical test probe from above the first brightness monitoring region to above the second brightness monitoring region. Then, the second initial brightness value and the second test brightness value are collected based on the same operation process as S210.
Based on the second initial brightness value, the second test brightness value and the preset time length, a plurality of brightness variation amounts of the brightness monitoring region when the second test pattern is used can be calculated. And further judging the ghost level of the display panel when the display panel displays the second test pattern.
It is to be understood that, since the collected reference pictures are the same, the first initial brightness value and the second initial brightness value may be the same. In the embodiment, different test patterns are used, so that the residual image level of the display panel under different conditions can be tested, and the comprehensive evaluation of the residual image condition of the display panel is facilitated.
In one embodiment, the first test pattern is a black circular area and the second test pattern is a white circular area. By using the black circular area and the white circular area, the method can be unified with a visual residual shadow method, so that the visual residual shadow can be quantized conveniently, and the test standard is unified.
In one embodiment, the white circular area may be located to the left of the middle of the first test frame and may be 10mm to 20mm in diameter. In one embodiment the white circular area is 15 mm. The black circular area may be located to the right in the middle of the first test frame, and may have a diameter of 10mm to 20 mm. In one embodiment the black circular area is 15 mm.
It should be understood that although the various steps in the flow charts of fig. 1-4 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least some of the steps in fig. 1-4 may include multiple sub-steps or multiple stages that are not necessarily performed at the same time, but may be performed at different times, and the order of performance of the sub-steps or stages is not necessarily sequential, but may be performed in turn or alternating with other steps or at least some of the sub-steps or stages of other steps.
Referring to fig. 6, an embodiment of the present invention further provides a display panel image sticking testing apparatus 10. The display panel image sticking testing device 10 includes a detection apparatus 110, an optical testing probe 120 and a control device 130.
The detection device 110 is configured to be connected to the display panel 140, and control the display panel 140 to display a reference picture, the test picture, and the reference picture in sequence. And the gray scales of the reference picture and the test picture are the same. The test picture comprises a test pattern. When the display panel 140 displays the test picture, the area of the display panel 140 corresponding to the test picture is a brightness monitoring area. The optical test probe 120 is configured to collect an initial brightness value in the brightness monitoring area when the display panel 140 displays the reference picture for the first time. When the display panel 140 displays the reference picture for the second time, a plurality of test brightness values are collected in the brightness monitoring area at intervals of a preset time length. The control device 130 is connected to the optical test probe 120, and is configured to determine the residual image level of the display panel 140 according to the initial brightness value, the test brightness value, and the preset time length. It is understood that the control device 130 may first receive the initial brightness value and the test brightness value and display the initial brightness value and the test brightness value.
In one embodiment, the detection device 110 may be a test PG, i.e. a pattern generator. The optical test probe 120 may be an optical test instrument (CA 410). The brightness can be directly displayed by the optical test instrument. The brightness data can be recorded directly by the control device. The control device 130 may be a computer or the like.
It is understood that if the test object is an end product, such as a mobile phone, the test picture and the reference picture can be switched and displayed by itself, and in this case, the display panel image sticking testing apparatus 10 may include only the optical test probe 120 and the control apparatus 130.
In one embodiment, the diameter of the optical test probe is smaller than the diameter of the test pattern. Therefore, the lighting area of the optical test probe can fall into the test pattern conveniently, and the situation that the optical test probe collects the area outside the test pattern due to the small test pattern is avoided. And thus can be conveniently operated.
In one embodiment, the optical test probe has a diameter of 8mm to 12 mm. The test pattern has a diameter of 13mm to 17 mm. Further, the optical test probe has a diameter of 10 mm. The diameter of the test pattern was 15 mm.
The embodiment of the application also provides computer equipment. The computer device comprises a memory and a processor, the memory storing a computer program. The processor realizes the method steps of the above embodiments when executing the computer program.
The internal structure thereof may be as shown in fig. 7. The computer device includes a processor 12, a memory, a network interface 14, and a database connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a non-volatile storage medium 15, an internal memory 13. The non-volatile storage medium 15 stores an operating system, a computer program, and a database. The internal memory 13 provides an environment for the operation of an operating system and a computer program in the nonvolatile storage medium 15. The database of the computer equipment is used for storing the data of the ghost testing method of the display panel. The network interface 14 of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to realize a method for testing the ghost of the display panel.
It will be appreciated by those skilled in the art that the configuration shown in fig. 7 is a block diagram of only a portion of the configuration associated with the present application, and is not intended to limit the computing device to which the present application may be applied, and that a particular computing device may include more or fewer components than shown, or may combine certain components, or have a different arrangement of components.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (9)
1. A method for testing a residual image of a display panel is characterized by comprising the following steps:
providing a reference picture and a test picture with the same gray level, wherein the test picture comprises a test pattern, and when a display panel displays the test picture, the area of the display panel corresponding to the test pattern is a brightness monitoring area; the color of the test pattern is different from the colors of other positions of the test picture;
controlling the display panel to sequentially display the reference picture, the test picture and the reference picture, acquiring an initial brightness value in the brightness monitoring area when the display panel displays the reference picture for the first time, and acquiring a plurality of test brightness values in the brightness monitoring area at intervals of a preset time length when the display panel displays the reference picture for the second time;
judging the ghost level of the display panel according to the initial brightness value, the test brightness value and the preset time length;
wherein the determining the level of the afterimage of the display panel according to the initial brightness value, the test brightness value and the preset time length comprises:
obtaining a plurality of brightness variation quantities of the brightness monitoring area according to the ratio of the difference between each test brightness value and the initial brightness value to the initial brightness value;
and when the brightness variation is not greater than a brightness variation preset value, judging the ghost level of the display panel according to the time for collecting the test brightness value corresponding to the brightness variation.
2. The method as claimed in claim 1, wherein the controlling the display panel to sequentially display the reference picture, the test picture and the reference picture, and the collecting an initial brightness value in the brightness monitoring area when the display panel displays the reference picture for the first time and collecting a plurality of test brightness values in the brightness monitoring area at intervals of a predetermined time length when the display panel displays the reference picture for the second time comprises:
controlling the display panel to display the reference picture in a first preset time length, and collecting the initial brightness value of the brightness monitoring area;
controlling the display panel to display the test picture in a second preset time length;
controlling the display panel to display the reference picture, and collecting a plurality of test brightness values in the brightness monitoring area at intervals of a third preset time length;
the first preset time length and the second preset time length are greater than the third preset time length.
3. The method for testing image sticking of a display panel according to claim 1, wherein the test pattern is a circular area.
4. The method according to claim 1, wherein the test frame comprises a first test frame and a second test frame, the test pattern comprises a first test pattern and a second test pattern, the first test frame comprises the first test pattern, the second test frame comprises the second test pattern, the first test pattern has a different color from the second test pattern, the initial brightness value comprises a first initial brightness value and a second initial brightness value, and the test brightness value comprises a first test brightness value and a second test brightness value;
the brightness monitoring area comprises a first brightness monitoring area and a second brightness monitoring area, when the display panel displays the first test picture, the area of the display panel corresponding to the first test picture is the first brightness monitoring area, when the display panel displays the second test picture, the area of the display panel corresponding to the second test picture is the second brightness monitoring area, and the first brightness monitoring area and the second brightness monitoring area are arranged at intervals; the controlling the display panel to sequentially display the reference picture, the test picture and the reference picture, acquiring an initial brightness value in the brightness monitoring area when the display panel displays the reference picture for the first time, and acquiring a plurality of test brightness values in the brightness monitoring area at intervals of a preset time length when the display panel displays the reference picture for the second time includes:
controlling the display panel to sequentially display the reference picture, the first test picture and the reference picture, acquiring a first initial brightness value in the first brightness monitoring area when the display panel displays the reference picture for the first time, and acquiring a plurality of first test brightness values in the first brightness monitoring area at intervals of the preset time length when the display panel displays the reference picture for the second time;
and controlling the display panel to display the reference picture, the second test picture and the reference picture in sequence, collecting a second initial brightness value in the second brightness monitoring area when the display panel displays the reference picture for the third time, and collecting a plurality of second test brightness values in the second brightness monitoring area at intervals of the preset time length when the display panel displays the reference picture for the fourth time.
5. The method as claimed in claim 4, wherein the first test pattern is a black circular area and the second test pattern is a white circular area.
6. The method for testing image sticking of a display panel according to claim 4, wherein the first test pattern and the second test pattern are located on a same horizontal line when the first test image and the second test image are overlapped.
7. A display panel ghost testing device is characterized by comprising:
the detection device is used for being connected with a display panel and controlling the display panel to display a reference picture, a test picture and the reference picture in sequence, wherein the gray scales of the reference picture and the test picture are the same, the test picture comprises a test pattern, and the color of the test pattern is different from the colors of other positions of the test picture; when the display panel displays the test picture, the area of the display panel corresponding to the test picture is a brightness monitoring area;
the optical test probe is used for collecting an initial brightness value in the brightness monitoring area when the display panel displays the reference picture for the first time, and collecting a plurality of test brightness values in the brightness monitoring area at intervals of preset time length when the display panel displays the reference picture for the second time;
the control device is connected with the optical test probe and used for judging the residual image level of the display panel according to the initial brightness value, the test brightness value and the preset time length;
wherein, the control device is configured to determine the afterimage level of the display panel according to the initial brightness value, the test brightness value and the preset time duration, and includes: obtaining a plurality of brightness variation quantities of the brightness monitoring area according to the ratio of the difference between each test brightness value and the initial brightness value to the initial brightness value; and when the brightness variation is not greater than a brightness variation preset value, judging the ghost level of the display panel according to the time for collecting the test brightness value corresponding to the brightness variation.
8. The apparatus of claim 7, wherein the optical test probe has a diameter smaller than a diameter of the test pattern.
9. A computer device comprising a memory and a processor, the memory storing a computer program, wherein the processor implements the steps of the method of any one of claims 1 to 6 when executing the computer program.
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| CN113643658B (en) * | 2021-10-14 | 2022-01-14 | 惠科股份有限公司 | Debugging method of display panel, display device and storage medium |
| CN113643637B (en) * | 2021-10-14 | 2022-01-14 | 惠科股份有限公司 | Debugging method of display panel, display device and storage medium |
| CN114038362B (en) * | 2021-11-03 | 2023-11-14 | 合肥维信诺科技有限公司 | Residual image detection method, device and system for curved display screen |
| CN114442346B (en) * | 2022-01-25 | 2024-01-12 | 苏州华星光电技术有限公司 | Method and device for calculating ghost of display panel, storage medium and terminal equipment |
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| CN107221276B (en) * | 2017-07-28 | 2020-07-03 | 京东方科技集团股份有限公司 | Method and device for detecting afterimage of display device |
| CN108922463A (en) * | 2018-07-25 | 2018-11-30 | 京东方科技集团股份有限公司 | The level of residual image detection method and level of residual image detection device of display panel |
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