CN111883036A - Compensation method and compensation device of display panel - Google Patents
Compensation method and compensation device of display panel Download PDFInfo
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- CN111883036A CN111883036A CN202010739417.5A CN202010739417A CN111883036A CN 111883036 A CN111883036 A CN 111883036A CN 202010739417 A CN202010739417 A CN 202010739417A CN 111883036 A CN111883036 A CN 111883036A
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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
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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
- G09G2360/00—Aspects of the architecture of display systems
- G09G2360/14—Detecting light within display terminals, e.g. using a single or a plurality of photosensors
- G09G2360/145—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light originating from the display screen
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Abstract
The invention discloses a compensation method and a compensation device for a display panel. The compensation method of the display panel comprises the following steps: acquiring a display picture of a display panel through an image sensor; the display screen includes a plurality of sub-screens, each sub-screen including display data; determining the data reject ratio of the image sensor according to the display picture; when the data reject ratio of the image sensor is smaller than the preset value, the display picture is compensated, the accuracy of the display picture acquired by the image sensor can be ensured, and the compensation precision of the display panel can be ensured. Moreover, the display data of the display screen is used as the inspection data of the display panel, so that the inspection precision of the display panel can be ensured. The image sensor is replaced until the data reject ratio of the image sensor is equal to the preset value, so that the image sensor can be utilized to the maximum extent on the basis of meeting the compensation precision of the display panel, and the utilization rate of the image sensor is improved.
Description
Technical Field
The embodiment of the invention relates to the technical field of display, in particular to a compensation method and a compensation device for a display panel.
Background
In the compensation process of the display panel, the image sensor is required to photograph to obtain a display picture of the display panel, and the luminance of the display panel is obtained through the display picture to be used as display data of the subsequent inspection and compensation display panel. As the image sensor is used, thermal energy generated from the image sensor is accelerated to shorten its life. When the image sensor breaks down, the accuracy of the display data acquired by the image sensor is lower, and when the display data is adopted to inspect and compensate the display panel in the later period, the inspection accuracy and the compensation accuracy of the display panel are lower, so that the display effect of the display panel is reduced. For example, when the image sensor malfunctions, the accuracy of the light emission luminance data of the display panel is 20% to 30% lower than that when the image sensor is normal, or the difference in the level of the light emission luminance data is too large. When the image processing is performed by using the light emission luminance data, the light emission luminance data corresponding to the defective image sensor needs to be compensated, which increases the time for image processing. When the number of image sensor failures is large, the accuracy of the light emission luminance data is low, and the reliability of the light emission luminance data is easily lost.
In order to ensure the accuracy of the image sensor for acquiring the display data, the image sensor can be replaced periodically. However, the regular replacement of the image sensor is likely to cause waste in the use of the image sensor or fail to ensure the accuracy of the image sensor in acquiring the display data, and there is a contradiction between the accuracy of the inspection and compensation of the display panel and the cost of the inspection and compensation.
Disclosure of Invention
The invention provides a compensation method and a compensation device of a display panel, which are used for ensuring the inspection precision and the compensation precision of the display panel and improving the utilization rate of an image sensor.
In a first aspect, an embodiment of the present invention provides a compensation method for a display panel, including:
acquiring a display picture of a display panel through an image sensor; the display screen comprises a plurality of sub-screens, each of which comprises display data;
determining the data reject ratio of the image sensor according to the display picture;
and when the data reject ratio of the image sensor is smaller than a preset value, compensating the display picture.
Optionally, determining a data failure rate of the image sensor according to the display screen includes:
determining the thermalization number of the sub-picture according to the display data in the sub-picture;
and determining the data failure rate of the image sensor according to the thermalization number of the sprites and the total number of the sprites.
Optionally, determining the thermalization amount of the sub-picture according to the display data in the sub-picture includes:
when the display data of a sub-picture exceeds the threshold range of the display data, determining the thermalization of the sub-picture, recording as a thermalized sub-picture and counting.
Optionally, after determining the thermalization amount of the sub-picture according to the display data in the sub-picture, the method further includes:
and correcting the display data of the thermalized sub-picture according to the display data of the sub-picture around the thermalized sub-picture.
Optionally, modifying the display data of the thermalized sub-picture according to the display data of the sub-picture around the thermalized sub-picture includes:
calculating an average value of display data of the sprites around the thermalized sprite;
and correcting the display data of the thermalization sprite into an average value of the display data.
Optionally, the compensation method of the display panel further includes:
and when the data reject ratio of the image sensor is greater than or equal to the preset value, outputting warning information.
In a second aspect, an embodiment of the present invention further provides a compensation apparatus for a display panel, including:
the display image acquisition module is used for acquiring a display image of the display panel through the image sensor; the display screen comprises a plurality of sub-screens, each of which comprises display data;
the reject ratio determining module is used for determining the data reject ratio of the image sensor according to the display picture;
and the compensation module is used for compensating the display picture when the data reject ratio of the image sensor is smaller than a preset value.
Optionally, the reject ratio determining module includes:
the hot quantity determining unit of the sub-picture is used for determining the hot quantity of the sub-picture according to the display data in the sub-picture;
and the defective rate calculating unit is used for determining the data defective rate of the image sensor according to the thermalization number of the sub-pictures and the total number of the sub-pictures.
Optionally, the sub-picture thermalization amount determining unit includes:
the judging unit is used for determining the thermalization of a sub-picture when the display data of the sub-picture exceeds the threshold range of the display data and recording the thermalization as a thermalized sub-picture;
and the counting unit is used for counting the thermalization sprites.
Optionally, the compensation apparatus of the display panel further includes:
and the correction module is used for correcting the display data of the thermalized sub-picture according to the display data of the sub-picture around the thermalized sub-picture.
According to the technical scheme of the embodiment of the invention, the display picture of the display panel is obtained through the image sensor, and the data reject ratio of the image sensor is determined according to the display picture. When the data reject ratio of the image sensor is smaller than the preset value, the accuracy of the display picture acquired by the image sensor can be ensured, so that compensation can be performed on the display panel, and when the display data of the display picture is adopted as the data to be compensated when the display panel is compensated, the compensation precision of the display panel is ensured. Moreover, the display data of the display screen is used as the inspection data of the display panel, so that the inspection precision of the display panel can be ensured. The image sensor is replaced until the data reject ratio of the image sensor is equal to the preset value, so that the image sensor can be utilized to the maximum extent on the basis of meeting the compensation precision of the display panel, and the utilization rate of the image sensor is improved.
Drawings
Fig. 1 is a schematic flowchart illustrating a compensation method for a display panel according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating a compensation method for a display panel according to another embodiment of the present invention;
fig. 3 is a schematic diagram of a normal display image of an image sensor according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a display frame when an image sensor fails according to an embodiment of the present invention;
FIG. 5 is a flowchart illustrating a compensation method for a display panel according to another embodiment of the present invention;
fig. 6 is a schematic structural diagram of a compensation apparatus of a display panel according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Fig. 1 is a flowchart illustrating a compensation method for a display panel according to an embodiment of the present invention. The embodiment may be applied to a case where the image sensor photographs to obtain the display screen of the display panel, and the method may be performed by a compensation apparatus of the display panel, as shown in fig. 1, and the compensation method of the display panel includes:
s110, acquiring a display picture of a display panel through an image sensor; the display screen includes a plurality of sub-screens, each sub-screen including display data;
specifically, when the display panel displays a picture, the display picture of the display panel may be acquired by the image sensor. When the image sensor acquires a display screen, the image sensor divides a light image on a light receiving surface into a plurality of small units, and converts the light image of each small unit into an electric signal corresponding to the light image to form display data. The optical image of each small unit can be used as a sub-picture, and the optical image of each small unit is converted into an electric signal to be used as display data included in the sub-picture. Illustratively, the image sensor may divide the display screen into at least millions or even hundreds of millions of small cells, so that millions or even hundreds of millions of display data may be formed.
S120, determining the data reject ratio of the image sensor according to the display picture;
specifically, the data defect rate of the image sensor is a ratio of the number of sub-frames corresponding to defective display data to the number of all sub-frames in the display data corresponding to all sub-frames when the image sensor acquires the display frame. The data failure rate of an image sensor is related to the performance of the image sensor. When the image sensor is normal, the data failure rate of the image sensor is low, and when the image sensor fails, the data failure rate of the image sensor is high, so that the state of the image sensor can be judged according to the data failure rate of the image sensor.
And S130, when the data reject ratio of the image sensor is smaller than a preset value, compensating the display picture.
Specifically, when the data reject ratio of the image sensor is smaller than a preset value, the accuracy of a display picture acquired by the image sensor can be ensured, so that compensation can be performed on the display panel, and when the display data of the display picture is adopted as data to be compensated during compensation of the display panel, the compensation precision of the display panel is ensured. Moreover, the display data of the display screen is used as the inspection data of the display panel, so that the inspection precision of the display panel can be ensured. In addition, the preset value of the data defect rate of the image sensor may be a fixed value preset according to the compensation accuracy of the display panel. When the data reject ratio of the image sensor is smaller than the preset value, the number of the sub-pictures corresponding to the bad display data in the display picture acquired by the image sensor meets the requirement of the compensation precision of the display panel, and when the data reject ratio of the image sensor is equal to the preset value, the number of the sub-pictures corresponding to the bad display data in the display picture acquired by the image sensor just meets the requirement of the compensation precision of the display panel.
According to the technical scheme of the embodiment, the display picture of the display panel is obtained through the image sensor, and the data reject ratio of the image sensor is determined according to the display picture. When the data reject ratio of the image sensor is smaller than the preset value, the accuracy of the display picture acquired by the image sensor can be ensured, so that compensation can be performed on the display panel, and when the display data of the display picture is adopted as the data to be compensated when the display panel is compensated, the compensation precision of the display panel is ensured. Moreover, the display data of the display screen is used as the inspection data of the display panel, so that the inspection precision of the display panel can be ensured. The image sensor is replaced until the data reject ratio of the image sensor is equal to the preset value, so that the image sensor can be utilized to the maximum extent on the basis of meeting the compensation precision of the display panel, and the utilization rate of the image sensor is improved.
Fig. 2 is a flowchart illustrating another compensation method for a display panel according to an embodiment of the present invention. As shown in fig. 2, the compensation method of the display panel includes:
s210, acquiring a display picture of a display panel through an image sensor; the display screen includes a plurality of sub-screens, each sub-screen including display data;
s220, determining the thermalization number of the sub-picture according to the display data in the sub-picture;
specifically, after determining the display data corresponding to the sub-picture, the determining the thermalization number of the sub-picture according to the display data in the sub-picture may include:
when the display data of a sub-picture exceeds the threshold range of the display data, determining the thermalization of the sub-picture, recording as a thermalized sub-picture and counting.
The threshold range of the display data may be a preset display data range. When the image sensor is normal, the range of the display data may be used as the threshold range of the display data when the image sensor acquires the display screen of the display panel. When the display data of the sub-picture acquired by the image sensor exceeds the threshold range of the display data, the display data of the sub-picture is judged to be inaccurate display data, and the sub-picture thermalization can be determined to be a thermalized sub-picture. According to the above process, the display data of all the sub-pictures of the display picture are judged, and the thermalized sub-pictures are counted, so that the thermalization number of the sub-pictures can be determined according to the display data in the sub-pictures. Fig. 3 is a schematic view of a display screen when an image sensor provided by an embodiment of the present invention is normal, and fig. 4 is a schematic view of a display screen when an image sensor provided by an embodiment of the present invention is failed. As shown in fig. 3 and 4, the display screen exemplarily includes 9 sub-screens, when the image sensor fails, the middle sub-screen is changed from a gray-scale screen to a black screen, and the sub-screen is determined to be a thermalized sub-screen when the corresponding display data exceeds the threshold range of the display data of the sub-screen. And after the display data of all the sub-pictures of the display picture are judged, counting the thermalization sub-pictures, and determining the thermalization number of the sub-pictures.
And S230, determining the data failure rate of the image sensor according to the thermalization number of the sub-pictures and the total number of the sub-pictures.
Specifically, after the thermalization number of the sub-picture is determined, the ratio of the thermalization number of the sub-picture to the total data of the sub-picture is determined according to the thermalization number of the sub-picture and the total number of the sub-pictures, so that the data defect rate of the image sensor can be determined.
S240, when the data reject ratio of the image sensor is smaller than a preset value, compensating the display picture.
On the basis of the above technical solutions, after determining the thermalization number of the sub-picture according to the display data in the sub-picture, the method further includes:
and correcting the display data of the thermalized sprite according to the display data of the sprite around the thermalized sprite.
Specifically, with continued reference to fig. 3, after the middle sprite is determined to be a thermalized sprite, the display data of the middle sprite may be modified according to the display data of the sprites around it. Illustratively, modifying the display data of the thermalized sprite based on the display data of the sprite around the thermalized sprite includes:
calculating an average value of display data of the sprites around the thermalized sprite;
specifically, in fig. 3, the average value of the display data of the sprites around the middle sprite is calculated, that is, the average value of the display data of the other 8 sprites except for the middle sprite.
The display data of the thermalized sprite is corrected to an average value of the display data.
Specifically, the display data of the thermalized sub-frame is corrected to be the average value of the display data of the other 8 sub-frames, so that the display data of the thermalized sub-frame is closer to the display data corresponding to the thermalized sub-frame when the image sensor is normal, the display data of the thermalized sub-frame can be corrected to be the display data of the thermalized sub-frame when the image sensor is normal as much as possible, and the influence of the data reject ratio of the image sensor on the compensation of a subsequent display panel is reduced.
Fig. 5 is a flowchart illustrating another compensation method for a display panel according to an embodiment of the present invention. As shown in fig. 5, the compensation method of the display panel includes:
s510, acquiring a display picture of a display panel through an image sensor; the display screen includes a plurality of sub-screens, each sub-screen including display data;
s520, determining the data reject ratio of the image sensor according to the display picture;
s530, when the data reject ratio of the image sensor is smaller than a preset value, compensating the display picture.
And S540, outputting warning information when the data reject ratio of the image sensor is greater than or equal to a preset value.
Specifically, when the data reject ratio of the image sensor is greater than or equal to the preset value, the number of sub-pictures corresponding to defective display data in the display picture acquired by the image sensor is large, that is, the accuracy of the display picture acquired by the image sensor is relatively low, and when the display data of the display picture is used as data to be compensated in the compensation of the display panel, the compensation accuracy of the display panel cannot be ensured. Therefore, when the data reject ratio of the image sensor is greater than or equal to the preset value, the warning information is output, and the display picture is stopped being compensated, so that the phenomenon that the image processing time is increased and even the data reliability is lost when the data to be compensated is subjected to image processing on the basis of inaccurate data to be compensated in the compensation process of the display picture can be avoided, and the reliability of the image sensor is improved. In the display image compensation process, the image processing may be to compensate the display data by using a Demura algorithm.
The embodiment of the invention also provides a compensation device of the display panel. Fig. 6 is a schematic structural diagram of a compensation apparatus of a display panel according to an embodiment of the present invention. As shown in fig. 6, the compensation apparatus of the display panel includes:
a display image obtaining module 10, configured to obtain a display image of a display panel through an image sensor; the display screen includes a plurality of sub-screens, each sub-screen including display data;
a reject ratio determining module 20, configured to determine a data reject ratio of the image sensor according to the display screen;
and the compensation module 30 is configured to compensate the display frame when the data reject ratio of the image sensor is smaller than a preset value.
According to the technical scheme, the display image acquisition module acquires the display image of the display panel through the image sensor, and the reject ratio determination module determines the data reject ratio of the image sensor according to the display image. When the data reject ratio of the image sensor is smaller than the preset value, the accuracy of the display image acquired by the image sensor can be ensured, so that the compensation module can compensate on the display panel, and the compensation precision of the display panel is ensured when the display data of the display image is used as the data to be compensated when the display panel is compensated. Moreover, the display data of the display screen is used as the inspection data of the display panel, so that the inspection precision of the display panel can be ensured. The image sensor is replaced until the data reject ratio of the image sensor is equal to the preset value, so that the image sensor can be utilized to the maximum extent on the basis of meeting the compensation precision of the display panel, and the utilization rate of the image sensor is improved.
On the basis of the above embodiment, the reject ratio determining module includes:
the hot quantity determining unit of the sub-picture is used for determining the hot quantity of the sub-picture according to the display data in the sub-picture;
and the defective rate calculating unit is used for determining the data defective rate of the image sensor according to the thermalization number of the sub-pictures and the total number of the sub-pictures.
Optionally, the picture thermalization amount determination unit includes:
the judging unit is used for determining the thermalization of a sub-picture when the display data of the sub-picture exceeds the threshold range of the display data and recording the thermalization as a thermalized sub-picture;
and the counting unit is used for counting the thermalization sprites.
On the basis of the above technical solutions, the compensation apparatus for a display panel may further include:
and the correction module is used for correcting the display data of the thermalized sub-picture according to the display data of the sub-picture around the thermalized sub-picture.
Specifically, the display data of the thermalized sub-picture is corrected through the display data of the sub-picture around the thermalized sub-picture, so that the display data of the thermalized sub-picture is closer to the display data corresponding to the thermalized sub-picture when the image sensor is normal, the display data of the thermalized sub-picture can be corrected to the display data of the thermalized sub-picture when the image sensor is normal as far as possible, and the influence of the data defect rate of the image sensor on the compensation of a subsequent display panel is reduced.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A compensation method for a display panel, comprising:
acquiring a display picture of a display panel through an image sensor; the display screen comprises a plurality of sub-screens, each of which comprises display data;
determining the data reject ratio of the image sensor according to the display picture;
and when the data reject ratio of the image sensor is smaller than a preset value, compensating the display picture.
2. The compensation method for the display panel according to claim 1, wherein determining the data failure rate of the image sensor according to the display screen comprises:
determining the thermalization number of the sub-picture according to the display data in the sub-picture;
and determining the data failure rate of the image sensor according to the thermalization number of the sprites and the total number of the sprites.
3. The compensation method for a display panel according to claim 2, wherein determining the thermalization amount of the sub-picture according to the display data in the sub-picture comprises:
when the display data of a sub-picture exceeds the threshold range of the display data, determining the thermalization of the sub-picture, recording as a thermalized sub-picture and counting.
4. The compensation method for a display panel according to claim 3, wherein after determining the thermalization amount of the sub-picture according to the display data in the sub-picture, further comprising:
and correcting the display data of the thermalized sub-picture according to the display data of the sub-picture around the thermalized sub-picture.
5. The compensation method for a display panel according to claim 4, wherein the modifying the display data of the thermalized sprite based on the display data of the sprite around the thermalized sprite comprises:
calculating an average value of display data of the sprites around the thermalized sprite;
and correcting the display data of the thermalization sprite into an average value of the display data.
6. The compensation method for a display panel according to claim 1, further comprising:
and when the data reject ratio of the image sensor is greater than or equal to the preset value, outputting warning information.
7. A compensation apparatus for a display panel, comprising:
the display image acquisition module is used for acquiring a display image of the display panel through the image sensor; the display screen comprises a plurality of sub-screens, each of which comprises display data;
the reject ratio determining module is used for determining the data reject ratio of the image sensor according to the display picture;
and the compensation module is used for compensating the display picture when the data reject ratio of the image sensor is smaller than a preset value.
8. The compensation apparatus for a display panel according to claim 7, wherein the defect rate determining module comprises:
the hot quantity determining unit of the sub-picture is used for determining the hot quantity of the sub-picture according to the display data in the sub-picture;
and the defective rate calculating unit is used for determining the data defective rate of the image sensor according to the thermalization number of the sub-pictures and the total number of the sub-pictures.
9. The compensation apparatus for a display panel according to claim 8, wherein the sub-picture thermalization amount determination unit comprises:
the judging unit is used for determining the thermalization of a sub-picture when the display data of the sub-picture exceeds the threshold range of the display data and recording the thermalization as a thermalized sub-picture;
and the counting unit is used for counting the thermalization sprites.
10. The compensation device for a display panel according to claim 9, further comprising:
and the correction module is used for correcting the display data of the thermalized sub-picture according to the display data of the sub-picture around the thermalized sub-picture.
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