IP Library › Granted Patent US 12676109

Granted Patent B2

US 12676109 · App. 18/287,305 · Granted Jul 7, 2026

Method for sensing pixel internal data, display device and storage medium

Inventors: Yao Zhang (Beijing, CN); Wenchao Bao (Beijing, CN); Song Meng (Beijing, CN); Xiaolong Wei (Beijing, CN); Miao Liu (Beijing, CN); Cheng Xu (Beijing, CN)

Assignees: HEFEI BOE JOINT TECHNOLOGY CO. , LTD.; BOE TECHNOLOGY GROUP CO., LTD.

G09G3/3233 G09G2320/029 G09G2330/10

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Quick Facts

Patent No.: US 12676109
App. No.: 18/287,305
Granted: Jul 7, 2026
Kind: B2

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USPTO Patent Center↗ Full Patent PDF↗

Abstract

Provided is a method for sensing pixel internal data in a display device. The method includes: sensing pixel internal data for each line of pixel units to determine column sequence numbers of suspected abnormal pixel units in the line of pixel units; determining, based on a number of the suspected abnormal pixel units of each column sequence number in the at least three lines of pixel units, whether a sensing signal line corresponding to the column sequence number is an abnormal sensing signal line; and in a case that there is at least one abnormal sensing signal line, replacing pixel internal data of a column of pixel units corresponding to each abnormal sensing signal line with pixel internal data of at least one column of pixel units adjacent to the abnormal sensing signal line each time the pixel internal data of all pixel units is sensed.

Claims (70)

1 . A method for sensing pixel internal data in a display device, the display device comprising a plurality of pixel units and a plurality of sensing signal lines, the plurality of pixel units being arranged in multiple lines and multiple columns, and the sensing signal lines having a one-to-one correspondence with columns of the plurality of pixel units; wherein

the method comprises:

sensing the pixel internal data for each of at least three lines of pixel units to determine column sequence numbers of suspected abnormal pixel units in the line of pixel units, the suspected abnormal pixel units being pixel units in which the pixel internal data as sensed meets an abnormality determination condition;

determining, based on a number of the suspected abnormal pixel units of each column sequence number in the at least three lines of pixel units, whether a sensing signal line corresponding to the column sequence number is an abnormal sensing signal line; and

in response to detecting at least one abnormal sensing signal line, replacing pixel internal data of a column of pixel units corresponding to each abnormal sensing signal line with pixel internal data of at least one column of pixel units directly adjacent to the abnormal sensing signal line during at least one full-screen sensing process;

wherein the determining, based on the number of the suspected abnormal pixel units of each column sequence number in the at least three lines of pixel units, whether the sensing signal line corresponding to the column sequence number is the abnormal sensing signal line comprises:

in a process of sensing the pixel internal data of the at least three lines of pixel units line by line to determine the column sequence numbers of the suspected abnormal pixel units in each line, in response to any of the column sequence numbers appearing consecutively for m times among consecutive m lines, determining the sensing signal line corresponding to the column sequence number as the abnormal sensing signal line, and no longer performing a separate operation to determine whether the sensing signal line corresponding to the column sequence number is the abnormal sensing signal line;

in the process of sensing the pixel internal data of the at least three lines of pixel units line by line to determine the column sequence numbers of the suspected abnormal pixel units in each line, in response to any of the column sequence numbers not appearing consecutively for n times among consecutive n lines, determining the sensing signal line corresponding to the column sequence number as a normal sensing signal line, and no longer performing the separate operation to determine whether the sensing signal line corresponding to the column sequence number is the abnormal sensing signal line; and

in the process of sensing the pixel internal data of the at least three lines of pixel units line by line to determine the column sequence numbers of the suspected abnormal pixel units in each line, in response to a result indicating whether each of the sensing signal lines is the abnormal sensing signal line having been determined, stopping the sensing of the pixel internal data of the at least three lines of pixel units line by line,

wherein the m being an integer not less than 2, the n being an integer not less than 3;

wherein the abnormality determination condition includes at least one of following conditions:

a value of the pixel internal data of the pixel unit is greater than a set upper limit value;

the value of the pixel internal data of the pixel unit is less than a set lower limit value;

the value of the pixel internal data of the pixel unit exceeds a set value range;

a difference between the value of the pixel internal data of the pixel unit and a value of pixel internal data of a column of pixel units previous to a current column is greater than a set value;

a difference between the value of the pixel internal data of the pixel unit and a value of pixel internal data of a column of pixel units next to the current column is greater than a set value; or

a difference between the value of the pixel internal data of the pixel unit and a value of history pixel internal data of the pixel unit is greater than a set value.

2 . The method according to claim 1 , prior to sensing the pixel internal data for each line of pixel units, the method further comprising:

selecting at least three line sequence numbers randomly or equidistantly to determine multiple lines of pixel units corresponding to the at least three line sequence numbers as the at least three lines of pixel units in which the pixel internal data is to be sensed.

3 . The method according to claim 1 , wherein the determining, based on the number of the suspected abnormal pixel units of each column sequence number in the at least three lines of pixel units, whether the sensing signal line corresponding to the column sequence number is the abnormal sensing signal line further comprises:

in the process of sensing the pixel internal data of the at least three lines of pixel units line by line to determine the column sequence numbers of the suspected abnormal pixel units in each line, in response to any of the column sequence numbers appearing for x times among different lines, determining the sensing signal line corresponding to the column sequence number as the abnormal sensing signal line, and no longer performing the separate operation to determine whether the sensing signal line corresponding to the column sequence number is the abnormal sensing signal line; and

in the process of sensing the pixel internal data of the at least three lines of pixel units line by line to determine the column sequence numbers of the suspected abnormal pixel units in each line, in response to any of the column sequence numbers not appearing for y times among different lines, determining the sensing signal line corresponding to the column sequence number as the normal sensing signal line, and no longer performing the separate operation to determine whether the sensing signal line corresponding to the column sequence number is the abnormal sensing signal line, wherein

the x is an integer not less than 2, and the y is equal to a number of lines of at least three lines of pixel units minus the x plus 1.

4 . The method according to claim 1 , wherein the display device further comprises an internal memory and an external memory, and the method further comprises:

each time the display device is switched on, detecting whether the abnormal sensing signal line is present in the plurality of sensing signal lines, and storing a detection result in the internal memory for use in the at least one full-screen sensing process;

updating and storing in the external memory the detection result each time whether the abnormal sensing signal line is present in the plurality of sensing signal lines is detected, and reading the detection result stored in the external memory into the internal memory each time the display device is switched on, for use in the at least one full-screen sensing process.

5 . The method according to claim 1 , wherein the number of the suspected abnormal pixel units of a column sequence number corresponding to the abnormal sensing signal line among at least three lines of pixel units is not less than 2.

6 . The method according to claim 1 , wherein the pixel internal data comprises at least one of temperature, pressure, voltage, current, and light intensity.

7 . The method according to claim 6 , wherein the pixel internal data comprises data of a threshold voltage of a transistor inside the pixel unit.

8 . The method according to claim 1 , wherein the abnormality determination condition for the suspected abnormal pixel unit comprises: a difference between a value of pixel internal data of a current pixel unit and a value of pixel internal data of a pixel unit in a column previous to the current pixel unit is greater than an upper limit value, and a difference between the value of the pixel internal data of the current pixel unit and a value of pixel internal data of a pixel unit in a column next to the current pixel unit is greater than the upper limit value, the upper limit value being equal to one-fourth of a theoretical maximum value of the pixel internal data, the theoretical maximum value of the pixel internal data is a threshold voltage of a transistor inside the pixel unit.

9 . The method according to claim 1 , wherein the replacing the pixel internal data of the column of pixel units corresponding to each abnormal sensing signal line with the pixel internal data of at least one column of pixel units adjacent to the abnormal sensing signal line during the at least one full-screen sensing process comprises:

during an odd-numbered full-screen sensing, replacing the pixel internal data of the column of pixel units corresponding to each abnormal sensing signal line with pixel internal data of a column of pixel units on a left side of the abnormal sensing signal line; and during an even-numbered full-screen sensing, replacing the pixel internal data of the column of pixel units corresponding to each abnormal sensing signal line with pixel internal data of a column of pixel units on a right side of the abnormal sensing signal line;

during an odd-numbered full-screen sensing, replacing the pixel internal data of the column of pixel units corresponding to each abnormal sensing signal line with pixel internal data of a column of pixel units on a right side of the abnormal sensing signal line; and during an even-numbered full-screen sensing, replacing the pixel internal data of the column of pixel units corresponding to each abnormal sensing signal line with pixel internal data of a column of pixel units on a left side of the abnormal sensing signal line.

10 . The method according to claim 1 , wherein the replacing the pixel internal data of the column of pixel units corresponding to each abnormal sensing signal line with the pixel internal data of at least one column of pixel units adjacent to the abnormal sensing signal line during the at least one full-screen sensing process comprises:

during an odd-numbered full-screen sensing, replacing the pixel internal data of the column of pixel units corresponding to each abnormal sensing signal line with pixel internal data of a column of pixel units on a right side of the abnormal sensing signal line; and during an even-numbered full-screen sensing, replacing the pixel internal data of the column of pixel units corresponding to each abnormal sensing signal line with an average value of pixel internal data of a column of pixel units on a left side of the abnormal sensing signal line and the pixel internal data of the column of pixel units on the right side of the abnormal sensing signal line;

during an odd-numbered full-screen sensing, replacing the pixel internal data of the column of pixel units corresponding to each abnormal sensing signal line with an average value of pixel internal data of a column of pixel units on a left side of the abnormal sensing signal line and pixel internal data of a column of pixel units on a right side of the abnormal sensing signal line; and during an even-numbered full-screen sensing, replacing the pixel internal data of the column of pixel units corresponding to each abnormal sensing signal line with the pixel internal data of the column of pixel units on the right side of the abnormal sensing signal line.

11 . A display device, comprising a processor, a memory, a plurality of pixel units and a plurality of sensing signal lines, the plurality of pixel units being arranged in multiple lines and multiple columns, and the sensing signal lines having a one-to-one correspondence with columns of the plurality of pixel units; wherein

the memory is configured to store at least one instruction, at least one program, a code set, or an instruction set therein, and the at least one instruction, the at least one program, the code set or the instruction set, when loaded and executed by the processor, causes the processor to perform:

sensing pixel internal data for each of at least three lines of pixel units to determine column sequence numbers of suspected abnormal pixel units in the line of pixel units, the suspected abnormal pixel units being pixel units in which the pixel internal data as sensed meets an abnormality determination condition;