Pixel compensation method, device, equipment, display panel and storage medium

Abstract

The application provides a pixel compensation method, device, equipment, display panel and storage medium. The method comprises: in a first threshold voltage detection process, detecting a first sensing voltage value corresponding to a first sub-pixel in a first pixel, the first pixel comprising a plurality of sub-pixels, the first sub-pixel being any one of the plurality of sub-pixels, and the first threshold voltage detection process being a threshold voltage detection process corresponding to the first sub-pixel; in a case where it is determined that an OLED short circuit exists in an OLED driving circuit corresponding to the first sub-pixel according to the first sensing voltage value, compensating each sub-pixel in the first pixel according to a second sensing voltage value corresponding to each sub-pixel in the first pixel, the second sensing voltage value being obtained based on a sensing voltage value corresponding to each sub-pixel in a second pixel, and the second pixel being a pixel adjacent to the first pixel. The technical solution can realize normal driving of the pixel and avoid weak dark spots caused by the OLED short circuit corresponding to the sub-pixel.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of pixel compensation, and in particular to a pixel compensation method, device, equipment, display panel and storage medium. BACKGROUND

[0002] Organic light emitting diode (OLED) as a current type light emitting device has been more and more applied to display. Due to its self-luminous characteristics, compared with liquid crystal display (LCD), OLED display has high contrast, thin, bendable and other advantages.

[0003] There are multiple pixel circuits in the OLED display screen. The threshold voltage of the thin film transistor (TFT) in the pixel circuit will drift under long time pressure and high temperature conditions. Due to different display pictures and different data voltages written, the threshold drift of the driving TFT in each part of the OLED display panel is different, which will cause the difference in display brightness, so it is necessary to sense the electrical characteristics of the pixel and then compensate. In order to realize the detection of the electrical signal of the driving TFT, a sense line is usually connected between the driving TFT and the OLED, and a TFT switch is arranged between the sense line and the driving TFT. By opening the TFT switch, the voltage on the sense line is detected to sense the electrical characteristics of the pixel, so as to compensate the driving voltage. When the OLED corresponding to one sub-pixel in the pixel circuit is short-circuited, the voltage on the sense line will be too high, which will result in the decrease of the compensation value of the pixel circuit, so that weak dark spots are generated on the OLED panel. SUMMARY

[0004] The present application provides a pixel compensation method, device, equipment, display panel and storage medium to solve the problem of weak dark spots caused by short circuit of OLED in the pixel circuit.

[0005] In a first aspect, a pixel compensation method is provided, comprising:

[0006] In the first threshold voltage detection process, a first sensing voltage value corresponding to a first sub-pixel in a first pixel is detected; the first pixel comprises a plurality of sub-pixels, the first sub-pixel is any one of the plurality of sub-pixels, a pixel circuit corresponding to the first pixel comprises a plurality of OLED driving circuits, the plurality of OLED driving circuits correspond to the plurality of sub-pixels respectively, each OLED driving circuit comprises an OLED and a driving thin film transistor driving the OLED, the first threshold voltage detection process is a process of detecting the threshold voltage of the driving thin film transistor in a first OLED driving circuit, and the first OLED driving circuit is an OLED driving circuit corresponding to the first sub-pixel in the first pixel; each OLED driving circuit is connected with a sensing line through a sensing thin film transistor, and the first sensing voltage value is used to indicate the voltage on the sensing line.

[0007] In a case where it is determined according to the first sensing voltage value that the OLED in the first OLED driving circuit is short-circuited, each sub-pixel in the first pixel is compensated according to a second sensing voltage value corresponding to each sub-pixel in the first pixel, the second sensing voltage value corresponding to each sub-pixel in the first pixel is obtained based on a sensing voltage value corresponding to each sub-pixel in a second pixel, and the second pixel is a pixel adjacent to the first pixel.

[0008] In the technical solution, in the process of detecting the threshold voltage of the driving thin film transistor corresponding to the first sub-pixel in the first pixel, the first sensing voltage value corresponding to the first sub-pixel is detected, and in a case where it is determined according to the first sensing voltage value that the OLED corresponding to the first sub-pixel is short-circuited, each sub-pixel in the first pixel is compensated according to a second sensing voltage value corresponding to each sub-pixel. Since the second sensing voltage value corresponding to each sub-pixel is obtained based on the sensing voltage value of each sub-pixel in the second pixel adjacent to the first pixel, the second sensing voltage value corresponding to each sub-pixel is actually the sensing voltage value of the OLED under the condition of no short circuit, that is, the sensing voltage value under normal conditions, therefore, compensating each sub-pixel in the pixel according to the second sensing voltage value corresponding to each sub-pixel can realize that each sub-pixel in the pixel can be normally driven, and avoid weak dark spots caused by short circuit of the OLED corresponding to one sub-pixel.

[0009] With reference to the first aspect, in a possible implementation manner, the method further includes: in a case where it is determined that the OLED in the first OLED driving circuit is short-circuited according to the first sensing voltage value, skipping a threshold voltage detection process corresponding to a second sub-pixel in the first pixel, the second sub-pixel being a sub-pixel in the first pixel that has not undergone threshold voltage detection. Since the sensing voltage value corresponding to other sub-pixels in the same pixel will also increase in a case where the OLED corresponding to one sub-pixel is short-circuited, threshold voltage detection is directly skipped for other sub-pixels in the pixel when it is determined that the OLED corresponding to one sub-pixel in the pixel is short-circuited, which can improve threshold voltage detection efficiency.

[0010] With reference to the first aspect, in a possible implementation manner, after detecting the sensing voltage value corresponding to each sub-pixel in the first pixel, in a case where it is determined that the OLEDs in the pixel circuit corresponding to the first pixel are all not short-circuited according to the sensing voltage value corresponding to each sub-pixel in the first pixel, compensating each sub-pixel in the first pixel according to the sensing voltage value corresponding to each sub-pixel in the first pixel. In a case where the OLEDs corresponding to each sub-pixel in the pixel circuit are all not short-circuited, the sensing voltage value corresponding to the sub-pixel can truly reflect the driving voltage of the driving thin film transistor in the OLED driving circuit corresponding to the sub-pixel. Therefore, compensating the sub-pixel in the OLED pixel circuit using the sensing voltage value corresponding to the sub-pixel can achieve accurate compensation of each sub-pixel in the pixel circuit.

[0011] With reference to the first aspect, in a possible implementation manner, before compensating each sub-pixel in the first pixel according to the second sensing voltage value corresponding to each sub-pixel in the first pixel, the method further includes: determining that the OLED in the first OLED driving circuit is short-circuited if the first sensing voltage value is greater than or equal to a preset voltage threshold. This implementation manner is simple and reliable, and determines whether the OLED corresponding to the sub-pixel is short-circuited by comparing the sensing voltage value corresponding to the sub-pixel with the preset voltage threshold.

[0012] With reference to the first aspect, in a possible implementation manner, before compensating each sub-pixel in the first pixel according to the second sensing voltage value corresponding to each sub-pixel in the first pixel, the method further includes: obtaining a sensing voltage value corresponding to a target sub-pixel in each second pixel, the target sub-pixel being any sub-pixel to be compensated; and determining a mean value of the sensing voltage value corresponding to the target sub-pixel in each second pixel as the second sensing voltage value corresponding to the target sub-pixel in the first pixel.

[0013] With reference to the first aspect, in a possible implementation manner, the detecting the first sensing voltage value corresponding to the first sub-pixel in the first pixel comprises: detecting a sensing voltage on the sensing line; and performing analog-to-digital conversion on the sensing voltage on the sensing line to obtain the first sensing voltage value. The sensing voltage value is obtained through analog-to-digital conversion, which can accurately express the sensing voltage on the sensing line.

[0014] With reference to the first aspect, in a possible implementation manner, the first pixel and the second pixel both belong to a target OLED display panel; and the method further comprises: after detecting the sensing voltage value corresponding to each pixel in the target OLED display panel, generating a defect code corresponding to the target OLED display panel according to the sensing voltage value corresponding to each pixel, the defect code being used to indicate a pixel defect condition of the target OLED display panel; and determining a compensation algorithm of the target OLED display panel according to the defect code. By encoding the pixel defect condition of the OLED display panel and determining the compensation algorithm of the display panel according to the defect code, accurate compensation of the OLED display panel can be achieved.

[0015] The second aspect provides a pixel compensation apparatus, comprising:

[0016] The voltage detection module is configured to detect a first sensing voltage value corresponding to a first sub-pixel in a first pixel in a first threshold voltage detection process; the first pixel comprises a plurality of sub-pixels, the first sub-pixel is any one of the plurality of sub-pixels, a pixel circuit corresponding to the first pixel comprises a plurality of OLED driving circuits, the plurality of OLED driving circuits correspond to the plurality of sub-pixels respectively, each OLED driving circuit comprises an OLED and a driving thin film transistor driving the OLED, the first threshold voltage detection process is a process of detecting a threshold voltage of a driving thin film transistor in a first OLED driving circuit, the first OLED driving circuit is an OLED driving circuit corresponding to the first sub-pixel in the first pixel; each OLED driving circuit is connected to a sensing line through a sensing thin film transistor, and the first sensing voltage value is used to indicate a voltage on the sensing line.

[0017] The pixel compensation module is configured to, when it is determined that the OLED in the first OLED driving circuit is short-circuited according to the first sensing voltage value, compensate each sub-pixel in the first pixel according to a second sensing voltage value corresponding to each sub-pixel in the first pixel, the second sensing voltage value corresponding to each sub-pixel in the first pixel being obtained based on a sensing voltage value corresponding to each sub-pixel in a second pixel, the second pixel being a pixel adjacent to the first pixel.

[0018] In a third aspect, a computer device is provided, comprising a memory connected to one or more processors, and the one or more processors are configured to execute one or more computer programs stored in the memory, and the one or more processors, when executing the one or more computer programs, cause the computer device to implement the pixel compensation method of the first aspect.

[0019] In a fourth aspect, a computer readable storage medium is provided, and the computer readable storage medium stores a computer program, and the computer program comprises program instructions, and the program instructions, when executed by a processor, cause the processor to execute the pixel compensation method of the first aspect.

[0020] In a fifth aspect, a display panel is provided, comprising a compensation chip and a plurality of pixel circuits, and the plurality of pixel circuits are connected to the compensation chip, and the compensation chip is configured to execute the pixel compensation method of the first aspect.

[0021] The present application can achieve the following technical effects: Since the second sensing voltage value corresponding to each sub-pixel is obtained based on the sensing voltage value of each sub-pixel in the second pixel adjacent to the first pixel, the second sensing voltage value corresponding to each sub-pixel is actually the sensing voltage value of the OLED under the condition of no short circuit, i.e., the sensing voltage value under normal conditions. Therefore, compensating each sub-pixel in the pixel according to the second sensing voltage value corresponding to each sub-pixel can achieve normal driving of each sub-pixel in the pixel, and avoid weak dark spots caused by short circuit of the OLED corresponding to one sub-pixel. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 A pixel composition structure schematic diagram of an OLED display panel provided by an embodiment of the present application;

[0023] Figure 2 A circuit structure schematic diagram of an OLED driving circuit provided by an embodiment of the present application;

[0024] Figure 3 A circuit structure schematic diagram of a pixel circuit provided by an embodiment of the present application;

[0025] Figure 4 A circuit flow direction schematic diagram of the OLED short circuit in the pixel circuit provided by an embodiment of the present application;

[0026] Figure 5 A flowchart schematic diagram of a pixel compensation method provided by an embodiment of the present application;

[0027] Figure 6 A flowchart schematic diagram of another pixel compensation method provided by an embodiment of the present application;

[0028] Figure 7 A flowchart of another pixel compensation method provided by an embodiment of the present application is shown in FIG. 6;

[0029] Figure 8 A structural diagram of a pixel compensation device provided by an embodiment of the present application is shown in FIG. 7;

[0030] Figure 9 A structural block diagram of a display panel provided by an embodiment of the present application is shown in FIG. 8;

[0031] Figure 10 A structural diagram of a computer device provided by an embodiment of the present application is shown in FIG. 9. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.

[0033] The technical solutions of the present application can be applied to a pixel compensation scenario, and specifically to a compensation scenario of a pixel circuit in an OLED display panel.

[0034] For ease of understanding, first, the relevant structure of an OLED display panel and the compensation-related principles of the OLED display panel are introduced.

[0035] The pixel composition structure of an OLED display panel can be seen from Figure 1 The OLED display panel includes a plurality of pixels (pixel 11, pixel 12, pixel 13, … pixel mn) arranged in an array, and each pixel includes a plurality of sub-pixels. Each pixel has a pixel circuit inside, and the OLED display panel presents a pixel by driving an OLED in the pixel circuit to emit light. Each sub-pixel corresponds to an OLED driving circuit in the pixel circuit, and the OLED display panel presents the color of the sub-pixel by driving the OLED in the OLED driving circuit to emit light. The OLEDs in the OLED driving circuits corresponding to sub-pixels of different colors have different light-emitting colors. Each pixel circuit includes a plurality of OLED driving circuits, and the number of OLED driving circuits included in the pixel circuit is related to the number of sub-pixels included in the pixel. If a pixel includes 3 sub-pixels (red, green, and blue), the pixel circuit includes 3 OLED driving circuits; if a pixel includes 4 sub-pixels (red, green, blue, and white), the pixel circuit includes 4 OLED driving circuits.

[0036] The structures of the various OLED driving circuits in the OLED display panel are the same. An exemplary structure of an OLED driving circuit can be seen from Figure 2, including a scanning thin film transistor T1, a driving thin film transistor T2, a capacitor C and an OLED. The source of the scanning thin film transistor T1 is connected with a data signal line Data for receiving a data driving signal, the gate of the scanning thin film transistor T1 is connected with a scanning line for receiving a scanning driving signal, and the drain of the scanning thin film transistor T1 is connected with one end of the capacitor C and the gate of the driving thin film transistor T2. The source of the driving thin film transistor T2 is connected with a first direct current voltage signal EVDD, the drain of the driving thin film transistor T2 is connected with the other end of the capacitor C and the anode of the OLED, and the cathode of the OLED is connected with a second direct current voltage signal EVSS. It should be understood that, Figure 2 The OLED driving circuit shown is of a 2T1C structure, and the OLED driving circuit can also be of other structures, such as a 3T1C structure, a 4T1C structure, etc., which are not limited in the present application. The OLED driving circuit is also connected with an induction line S0 through an induction thin film transistor T3, the drain of the induction thin film transistor T3 is connected with the drain of the driving thin film transistor T2, the other end of the capacitor C and the anode of the OLED, the source of the induction thin film transistor T3 is connected with the induction line S0, and the gate of the induction thin film transistor T3 is connected with an induction driving line for receiving an induction driving signal.

[0037] A plurality of OLED driving circuits corresponding to a plurality of sub-pixels are connected to form a pixel circuit. An exemplary structure of a pixel circuit corresponding to a pixel including four sub-pixels can be seen from Figure 3 , which respectively include an OLED driving circuit Q1 corresponding to a red sub-pixel, an OLED driving circuit Q2 corresponding to a white sub-pixel, an OLED driving circuit Q3 corresponding to a blue sub-pixel and an OLED driving circuit Q4 corresponding to a green sub-pixel. The OLED driving circuit Q1, the OLED driving circuit Q2, the OLED driving circuit Q3 and the OLED driving circuit Q4 are connected with the same scanning line S1 and the same induction driving line S2, and the induction line S0 connected with each OLED driving circuit is connected with a reference line V1. The induction line S0 connected with each OLED driving circuit can also be connected to a compensation chip in the OLED display panel. It should be understood that, Figure 3 The pixel circuit shown is only an example of the present application, and the pixel circuit can also be of other structures, such as including three OLED driving circuits.

[0038] In the OLED driving circuit, a scanning thin-film transistor T1 is turned on by a scanning signal, and a driving voltage is applied to the driving thin-film transistor T2 by a data driving signal, causing T2 to turn on and enabling the OLED corresponding to the sub-pixel to emit light and display the color of the sub-pixel. Since the threshold voltage of the driving thin-film transistor T2 may shift, the brightness of the OLED may be insufficient, leading to a decrease in the display quality of the OLED display panel. Therefore, it is necessary to detect the threshold voltage of each driving thin-film transistor T2 and compensate for each data driving signal to ensure the display quality of the OLED display panel. One feasible solution is: when detecting the threshold voltage of the OLED driving circuit corresponding to a certain sub-pixel, an induction driving signal is used to turn on the induction thin-film transistor T3, causing the current originally flowing to the OLED to flow to the induction line S0. The compensation chip connected to the induction line S0 can detect the induced voltage on the induction line, and then the compensation chip can detect the threshold voltage of the driving thin-film transistor T2 and perform corresponding compensation based on the induced voltage on the induction line S0. The higher the induced voltage on the induction line S0, the higher the voltage value of the driving thin-film transistor T2, and the less voltage needs to be compensated; the lower the induced voltage on the induction line, the lower the voltage value of the driving thin-film transistor T2, and the more voltage needs to be compensated.

[0039] When the OLED corresponding to a sub-pixel in the pixel circuit is short-circuited, such as Figure 4 As shown, OLED ( Figure 4 The cathode voltage EVSS of the OLED in Q2 flows into the sensing line S0, increasing the voltage on the sensing line S0. Since the sensing line of each OLED driving circuit in the same pixel circuit is connected to the reference line, the sensed voltage detected when threshold voltage detection is performed on other sub-pixels in the same pixel is also too large. This reduces the voltage compensation for each sub-pixel in the same pixel during compensation, resulting in a decrease in pixel brightness, which appears as a dark spot.

[0040] In view of this, this application proposes a pixel compensation method that can overcome the above-mentioned defects and improve the yield of OLED display panels.

[0041] The technical solution of this application can be applied to OLED display panels, specifically to the compensation chip of OLED display panels.

[0042] The technical solution of this application is described in detail below.

[0043] See Figure 5 , Figure 5 This is a flowchart illustrating a pixel compensation method provided in an embodiment of this application, as shown below. Figure 5 As shown, the method includes the following steps:

[0044] S101, in the first threshold voltage detection process, detecting a first sensing voltage value corresponding to a first sub-pixel in the first pixel.

[0045] The first pixel can be any one pixel, and the first sub-pixel can be any one sub-pixel. The pixel circuit corresponding to the first pixel includes a plurality of OLED drive circuits, and the plurality of OLED drive circuits are respectively OLED drive circuits corresponding to a plurality of sub-pixels in the first pixel. When the first pixel includes three sub-pixels, the first sub-pixel can be any one of red, green, and blue, and the pixel circuit corresponding to the first pixel includes three OLED drive circuits, which are respectively OLED drive circuits corresponding to the red, green, and blue sub-pixels. When the first pixel includes four sub-pixels, the first sub-pixel can be any one of red, green, blue, and white, and the pixel circuit corresponding to the first pixel includes four OLED drive circuits, which are respectively OLED drive circuits corresponding to the red, green, blue, and white sub-pixels. For example, the circuit structure of the pixel circuit corresponding to the first pixel can be as shown in FIG. 2, the circuit structure of the OLED drive circuit corresponding to the first sub-pixel can be as shown in FIG. 2, and the OLED drive circuit corresponding to the first sub-pixel can be Q1, Q2, Q3, or Q4 in FIG. 2. Figure 3 Figure 3

[0046] The following describes the OLED drive circuit corresponding to the first sub-pixel as the first OLED drive circuit. The first threshold voltage detection process refers to a process of detecting the threshold voltage of the drive thin film transistor in the first OLED drive circuit.

[0047] In a specific implementation, the scanning thin film transistor in the first OLED drive circuit can be turned on by a scanning signal, the sensing thin film transistor in the first OLED drive circuit can be turned on by a sensing drive signal, then a voltage can be applied to the drive thin film transistor in the first OLED drive circuit by a data drive signal to turn on the drive thin film transistor in the first OLED drive circuit, and finally the voltage on the sensing line can be detected to obtain the first sensing voltage value.

[0048] Since the voltage on the sensing line is a continuous value, after detecting the voltage on the sensing line, the sensing voltage on the sensing line can be analog-to-digital converted to obtain the first sensing voltage value. Specifically, the voltage on the sensing line can be sampled, quantized, and encoded to obtain the first sensing voltage value. For example, after detecting the voltage on the sensing line, the voltage on the sensing line can be represented by 10-bit data to obtain the first sensing voltage value. By analog-to-digital conversion, the sensing voltage value can be accurately expressed, which is conducive to subsequent compensation processing.

[0049] ​​S102, in the case of determining that the OLED in the first OLED driving circuit is short-circuited according to the first induced voltage value, compensating each sub-pixel in the first pixel according to a second induced voltage value corresponding to each sub-pixel in the first pixel.

[0050] Specifically, the first induced voltage value can be compared with a preset voltage threshold value; if the first induced voltage value is greater than or equal to the preset voltage threshold value, it is determined that the OLED in the first OLED driving circuit is short-circuited; if the first induced voltage value is less than the preset voltage threshold value, it is determined that the OLED in the first OLED driving circuit is not short-circuited. The preset voltage threshold value is a threshold value of the induced voltage for measuring whether the OLED is short-circuited, and the preset voltage threshold value can be obtained by experimental testing or the like. By comparing the induced voltage value corresponding to the sub-pixel with the preset voltage threshold value to determine whether the OLED corresponding to the sub-pixel is short-circuited, the implementation is simple and reliable.

[0051] The second induced voltage value corresponding to each sub-pixel in the first pixel is obtained based on the induced voltage value corresponding to each sub-pixel of a second pixel, and the second pixel circuit is a pixel adjacent to the first pixel, i.e. a pixel around the first pixel. Each sub-pixel in the first pixel corresponds to a second induced voltage value, and the way of determining the second induced voltage value corresponding to each sub-pixel in the first pixel is the same.

[0052] For example, the second pixel is explained, assuming that the first pixel is pixel 22 in Figure 1 , the second pixel can include pixel 21, pixel 23, pixel 12 and pixel 32 in Figure 1 ; further, the second pixel can also include pixel 11, pixel 13, pixel 31 and pixel 33 in Figure 1 .

[0053] In a feasible implementation, the induced voltage value corresponding to a target sub-pixel in any one of the second pixels can be determined as the second induced voltage value corresponding to the target sub-pixel in the first sub-pixel. The target sub-pixel is any one of the sub-pixels in the first sub-pixel to be compensated. When the pixel contains four sub-pixels, the target sub-pixel can be any one of the red, green, blue and white sub-pixels; when the pixel contains three sub-pixels, the target sub-pixel can be any one of the red, green and blue sub-pixels.

[0054] Taking the first pixel as pixel 22 in Figure 1 , and the target sub-pixel as a red sub-pixel as an example, the induced voltage value corresponding to the red sub-pixel in pixel 21, the induced voltage value corresponding to the red sub-pixel in pixel 23, the induced voltage value corresponding to the red sub-pixel in pixel 12 or the induced voltage value corresponding to the red sub-pixel in pixel 32 can be determined as the second induced voltage value corresponding to the red sub-pixel in pixel 22.

[0055] In another possible implementation, the sensing voltage value corresponding to the target sub-pixel in each second pixel can also be obtained, and the average of the sensing voltage values corresponding to the target sub-pixel in each second pixel is determined as the second sensing voltage value corresponding to the target sub-pixel in the first pixel.

[0056] Still taking the first pixel as an example, Figure 1 For example, the target sub-pixel is a red sub-pixel, and the first pixel is pixel 1 in FIG. 2, the sensing voltage value corresponding to the red sub-pixel in pixel 21, the sensing voltage value corresponding to the red sub-pixel in pixel 23, the sensing voltage value corresponding to the red sub-pixel in pixel 12, and the sensing voltage value corresponding to the red sub-pixel in pixel 32 can be obtained, and the average of the four sensing voltage values is determined as the second sensing voltage value corresponding to the red sub-pixel in pixel 1.

[0057] The second sensing voltage value of the target sub-pixel is not limited to being determined by the above two implementations, and the maximum or minimum of the sensing voltage values corresponding to the target sub-pixel in each second pixel can also be determined as the second sensing voltage value corresponding to the target sub-pixel, which is not limited in the present application.

[0058] It should be noted that the second sensing voltage value should be determined based on the sensing voltage value corresponding to the target sub-pixel that is not short-circuited. If the OLED in the OLED driving circuit corresponding to the target sub-pixel in the second pixel is short-circuited, the sensing voltage value corresponding to the target sub-pixel of the short-circuited OLED should be discarded when determining the second sensing voltage value, and the sensing voltage value corresponding to the target sub-pixel of the OLED that is not short-circuited is used to determine the second sensing voltage value.

[0059] For example, the target sub-pixel is a red sub-pixel, and the first pixel is pixel 1 in FIG. 2, the sensing voltage value corresponding to the red sub-pixel in pixel 21, the sensing voltage value corresponding to the red sub-pixel in pixel 23, the sensing voltage value corresponding to the red sub-pixel in pixel 12, and the sensing voltage value corresponding to the red sub-pixel in pixel 32 can be obtained, and the average of the four sensing voltage values is determined as the second sensing voltage value corresponding to the red sub-pixel in pixel 1. Figure 1 For example, the target sub-pixel is a red sub-pixel, and the first pixel is pixel 1 in FIG. 2, the sensing voltage value corresponding to the red sub-pixel in pixel 21, the sensing voltage value corresponding to the red sub-pixel in pixel 23, the sensing voltage value corresponding to the red sub-pixel in pixel 12, and the sensing voltage value corresponding to the red sub-pixel in pixel 32 can be obtained, and the average of the four sensing voltage values is determined as the second sensing voltage value corresponding to the red sub-pixel in pixel 1. Figure 1 For example, the target sub-pixel is a red sub-pixel, and the first pixel is pixel 1 in FIG. 2, the sensing voltage value corresponding to the red sub-pixel in pixel 21, the sensing voltage value corresponding to the red sub-pixel in pixel 23, the sensing voltage value corresponding to the red sub-pixel in pixel 12, and the sensing voltage value corresponding to the red sub-pixel in pixel 32 can be obtained, and the average of the four sensing voltage values is determined as the second sensing voltage value corresponding to the red sub-pixel in pixel 1.

[0060] It should be understood that when the target sub-pixel is a sub-pixel of other colors in the first pixel, the determination of the second sensing voltage is the same as when the target sub-pixel is a red sub-pixel, which will not be described here. By determining the second sensing voltage in the same way, the second sensing voltage value corresponding to each sub-pixel in the first pixel can be determined, and then each sub-pixel in the first pixel can be compensated according to the second sensing voltage value corresponding to each sub-pixel. The process of compensating each sub-pixel in the first pixel should occur at the time when each sub-pixel in the first pixel needs to be compensated, and the application does not limit the compensation time and the compensation method of each sub-pixel in the first pixel.

[0061] In Figure 5 In the corresponding technical solution, in the process of detecting the threshold voltage of the first sub-pixel in the first pixel, the first sensing voltage value corresponding to the first sub-pixel is detected, and in the case that the first sub-pixel corresponds to the OLED short circuit is determined according to the first sensing voltage value, the sub-pixel in the first pixel is compensated according to the second sensing voltage value corresponding to each sub-pixel in the first sub-pixel. Since the second sensing voltage value corresponding to each sub-pixel is based on the sensing voltage value of each sub-pixel in the second pixel adjacent to the first pixel, the second sensing voltage value corresponding to each sub-pixel is the real sensing voltage value under the condition that the OLED is not short-circuited, that is, the sensing voltage value under normal conditions, therefore, compensating each sub-pixel in the pixel according to the second sensing voltage value corresponding to each sub-pixel can realize the normal driving of each sub-pixel in the pixel, and avoid weak dark spots caused by the short circuit of the OLED corresponding to one sub-pixel.

[0062] Referring to Figure 6 , Figure 6 The flowchart of another pixel compensation method provided by the embodiment of the application is shown in FIG. 2, which includes the following steps: Figure 6

[0063] S201, detecting the sensing voltage value corresponding to each sub-pixel in the first pixel.

[0064] Here, the definitions of the first pixel, each sub-pixel in the first pixel, and the sensing voltage value corresponding to each sub-pixel can be referred to the description of the foregoing step S101, which will not be described here.

[0065] In a feasible implementation, the threshold voltage detection process of each sub-pixel in the first pixel can be performed in sequence according to the method introduced in the foregoing S101 to obtain the sensing voltage value corresponding to each sub-pixel in the first pixel.

[0066] ​In another possible implementation, in the process of detecting the sensing voltage value corresponding to each sub-pixel in the first pixel, in the case that the OLED in the OLED driving circuit corresponding to the last sub-pixel (hereinafter referred to as the third sub-pixel) is determined to be short-circuited according to the sensing voltage value of the third sub-pixel, the threshold voltage detection process corresponding to the sub-pixel (hereinafter referred to as the second sub-pixel) after the third sub-pixel can be skipped, and the sensing voltage value corresponding to the third sub-pixel is directly determined as the sensing voltage value corresponding to the second sub-pixel; in the case that the OLED in the OLED driving circuit corresponding to the third sub-pixel is determined not to be short-circuited, the threshold voltage detection process of the second sub-pixel is performed, so as to obtain the sensing voltage value corresponding to each sub-pixel in the first pixel. Since in the case that the OLED corresponding to one sub-pixel is short-circuited, the cathode voltage of the short-circuited OLED will flow into the sensing line, so that the sensing voltage values corresponding to other sub-pixels in the same pixel are also increased, and the sensing voltage detected in the threshold voltage detection process of the other sub-pixel is too high and cannot truly reflect the threshold voltage of the driving thin film transistor corresponding to the other sub-pixel; therefore, when it is determined that the OLED corresponding to one sub-pixel in the pixel is short-circuited, the threshold voltage detection process of the sub-pixel in the pixel that has not been subjected to the threshold voltage detection process is directly skipped, so as to improve the threshold voltage detection efficiency.

[0067] S202, in the case that it is determined that the OLEDs in the pixel circuit corresponding to the first pixel are not short-circuited according to the sensing voltage values corresponding to each sub-pixel in the first pixel, compensating each sub-pixel in the first pixel according to the sensing voltage values corresponding to each sub-pixel in the first pixel.

[0068] The OLEDs in the pixel circuit corresponding to the first pixel are not short-circuited, which means that the OLEDs in the OLED driving circuits corresponding to each sub-pixel in the first pixel are not short-circuited. For example, the circuit structure of the pixel circuit corresponding to the first pixel is as shown in Figure 3 For example, the OLEDs in the pixel circuit corresponding to the first pixel are not short-circuited, which means that the OLEDs in the OLED driving circuit Q1, the OLED driving circuit Q2, the OLED driving circuit Q3 and the OLED driving circuit Q4 in Figure 3 are not short-circuited.

[0069] The way of judging whether the OLED in the OLED driving circuit corresponding to each sub-pixel in the first pixel is short-circuited can refer to the foregoing description of step S102, and will not be described herein again.

[0070] In the case that the OLEDs in the pixel circuit corresponding to the first pixel are determined to be short-circuited according to the sensing voltage values corresponding to each sub-pixel in the first pixel, the threshold voltage detection process of the sub-pixel in the pixel circuit corresponding to the first pixel is directly skipped, and the sensing voltage value corresponding to the last sub-pixel in the first pixel is directly determined as the sensing voltage value corresponding to the first pixel. Figure 6In the corresponding technical solution, the sensing voltage value corresponding to each sub-pixel in the pixel is acquired respectively, and whether the OLED in the OLED driving circuit corresponding to each sub-pixel is short-circuited is determined according to the sensing voltage value corresponding to each sub-pixel. In the case that it is determined that the OLED in the OLED driving circuit corresponding to each sub-pixel is not short-circuited, the sensing voltage value corresponding to each sub-pixel can truly reflect the driving voltage of the driving thin film transistor in the OLED driving circuit corresponding to each sub-pixel. Therefore, the compensation of each sub-pixel in the pixel by using the sensing voltage value corresponding to each sub-pixel can realize the accurate compensation and normal driving of each sub-pixel in the pixel.

[0071] Referring to Figure 7 , Figure 7 The flowchart of another pixel compensation method provided by the embodiment of the present application is shown in FIG. 4, which includes the following steps: Figure 7

[0072] S301, detecting the sensing voltage value corresponding to each pixel in the target OLED display panel.

[0073] The target OLED display panel includes a plurality of pixels. For example, the pixel structure of the target OLED display panel can be as shown in FIG. 5. Figure 1

[0074] Specifically, the threshold voltage detection process of each pixel in the target OLED display panel can be performed in sequence in the manner described in the foregoing step S201 to obtain the sensing voltage value corresponding to each pixel in the target OLED display panel.

[0075] S302, generating the defect code of the target OLED display panel according to the sensing voltage value corresponding to each pixel in the target OLED display panel.

[0076] Here, the defect code is used to indicate the pixel defect condition of the target OLED display panel. Different defect codes are used to indicate different pixel defect conditions.

[0077] ​​In a possible case, the pixel defect case can be divided according to the number of defective pixels in the target OLED display panel, wherein the defective pixel refers to a pixel with OLED short circuit in the pixel circuit. For example, according to the number of defective pixels, the pixel defect case can be divided into three cases, and the three cases are that the number of defective pixels is less than or equal to a first number, the number of defective pixels is greater than the first number and less than a second number, and the number of defective pixels is greater than the second number. In this case, the defect code has three types, which are respectively used to indicate that the number of defective pixels contained in the display panel is less than or equal to the first number, the number of defective pixels contained in the display panel is greater than the first number and less than the second number, and the number of defective pixels contained in the display panel is greater than the second number.

[0078] In this case, according to the sensing voltage value corresponding to each pixel, it can be determined whether each pixel contains a sub-pixel with OLED short circuit, and the pixel containing the sub-pixel with OLED short circuit is determined as a defective pixel. Then, the number of defective pixels is counted, and the defect code of the target OLED display is generated according to the number of defective pixels. The method for determining whether the sub-pixel is the sub-pixel with OLED short circuit can refer to the description of the foregoing step S102.

[0079] In other possible cases, the pixel defect case can also be divided in combination with the continuity of the defective pixel and the sensing voltage value corresponding to the defective pixel. The application does not limit the rules for dividing the pixel defect case and setting the corresponding defect code.

[0080] S303, determining the compensation algorithm of the target OLED display panel according to the defect code of the target OLED display panel.

[0081] Different defect codes correspond to different compensation algorithms. The compensation algorithm takes the sensing voltage value of the sub-pixel as the independent variable and takes the compensation value as the dependent variable.

[0082] S304, compensating each pixel in the target OLED display panel according to the compensation algorithm of the target OLED display panel.

[0083] Specifically, according to the compensation algorithm of the target OLED display panel, the compensation of each sub-pixel in the target OLED display panel can be performed in combination with the compensation method introduced in the foregoing step S102 or the foregoing step S202.

[0084] In Figure 7In the corresponding technical solution, by obtaining the induced voltage value corresponding to each pixel in the OLED display panel, generating a defect code indicating the pixel defect status of the OLED display panel based on the induced voltage value corresponding to each pixel, and using a compensation algorithm corresponding to the defect code to compensate each pixel in the OLED display panel, accurate compensation of the OLED display panel can be achieved, thereby improving the display quality of the OLED display panel.

[0085] The method of this application has been described above; the apparatus of this application will be described below.

[0086] See Figure 8 , Figure 8 This is a schematic diagram of the structure of a pixel compensation device provided in an embodiment of this application. Figure 8 As shown, the pixel compensation device 40 includes:

[0087] The voltage detection module 401 is used to detect a first sensed voltage value corresponding to a first sub-pixel in a first pixel during a first threshold voltage detection process. The first pixel includes multiple sub-pixels, and the first sub-pixel is any one of the multiple sub-pixels. The pixel circuit corresponding to the first pixel includes multiple OLED driving circuits, and the multiple OLED driving circuits respectively correspond to the multiple sub-pixels. Each OLED driving circuit includes an OLED and a driving thin-film transistor that drives the OLED. The first threshold voltage detection process is a process of detecting the threshold voltage of the driving thin-film transistor in the first OLED driving circuit. The first OLED driving circuit is the OLED driving circuit corresponding to the first sub-pixel in the first pixel. Each OLED driving circuit is connected to a sensing line through a sensing thin-film transistor, and the first sensed voltage value is used to indicate the voltage on the sensing line.

[0088] The pixel compensation module 402 is used to compensate each sub-pixel of the first pixel according to the second induced voltage value corresponding to each sub-pixel of the first pixel when it is determined that the OLED in the first OLED driving circuit is short-circuited according to the first induced voltage value. The second induced voltage value corresponding to each sub-pixel of the first pixel is obtained based on the induced voltage value corresponding to each sub-pixel of the second pixel, and the second pixel is a pixel adjacent to the first pixel.

[0089] In one possible design, the voltage detection module 401 is further configured to: skip the threshold voltage detection process corresponding to the second sub-pixel in the first pixel when it is determined that the OLED in the first OLED driving circuit is short-circuited based on the first sensed voltage value, wherein the second sub-pixel is the sub-pixel in the first pixel that has not yet undergone threshold voltage detection.

[0090] In one possible design, the pixel compensation module 402 is further configured to, after detecting the induced voltage value corresponding to each sub-pixel in the first pixel, and after determining that the OLEDs in the pixel circuit corresponding to the first pixel are not short-circuited based on the induced voltage value corresponding to each sub-pixel in the first pixel, compensate each sub-pixel in the first pixel based on the induced voltage value corresponding to each sub-pixel in the first pixel.

[0091] In one possible design, the voltage detection module 401 is further configured to: determine that the OLED of the first OLED driving circuit is short-circuited if the first sensed voltage value is greater than or equal to a preset voltage threshold.

[0092] In one possible design, the pixel compensation module 402 is further configured to: obtain the induced voltage value corresponding to the target sub-pixel in each second pixel, wherein the target sub-pixel is any sub-pixel to be compensated; and determine the average value of the induced voltage values ​​corresponding to the target sub-pixel in each second pixel as the second induced voltage value corresponding to the target sub-pixel in the first pixel.

[0093] In one possible design, the voltage detection module 401 is specifically used to: detect the induced voltage on the sensing line; and perform analog-to-digital conversion on the induced voltage on the sensing line to obtain the first induced voltage value.

[0094] In one possible design, both the first pixel and the second pixel belong to the target OLED display panel; the pixel compensation module 402 is further configured to: after detecting the induced voltage value corresponding to each pixel in the target OLED display panel, generate a defect code corresponding to the target OLED display panel based on the induced voltage value corresponding to each pixel, the defect code being used to indicate the pixel defect situation of the target OLED display panel; and determine the compensation algorithm for the target OLED display panel based on the defect code.

[0095] It should be noted that, Figure 8 For any content not mentioned in the corresponding embodiments, please refer to the description of the foregoing method embodiments, which will not be repeated here.

[0096] The aforementioned device, during the threshold voltage detection of the driving thin-film transistor corresponding to the first sub-pixel in the first pixel, detects the first induced voltage value corresponding to the first sub-pixel. If it is determined that the OLED corresponding to the first sub-pixel is short-circuited based on the first induced voltage value, the device compensates for the sub-pixels in the first pixel based on the second induced voltage values ​​corresponding to each sub-pixel in the first pixel. Since the second induced voltage value corresponding to each sub-pixel is obtained based on the induced voltage values ​​of each sub-pixel in the second pixel adjacent to the first pixel, the second induced voltage value corresponding to each sub-pixel is equivalent to the actual induced voltage value when the OLED is not short-circuited, i.e., the induced voltage value under normal conditions. Therefore, by compensating for each sub-pixel in the pixel based on the second induced voltage value corresponding to each sub-pixel, it is possible to ensure that each sub-pixel in the pixel can be driven normally, avoiding weak dark spots caused by a short circuit in the OLED corresponding to a single sub-pixel.

[0097] See Figure 9 , Figure 9 A structural block diagram of a display panel provided in an embodiment of this application is shown below. Figure 9 As shown, the display panel 50 includes a compensation chip 501 and multiple pixel circuits 502, which are connected to the compensation chip 501.

[0098] For example, the pixel circuit 502 can be as follows Figure 3 As shown.

[0099] The compensation chip 501 is used to perform the pixel compensation method in the above method embodiment.

[0100] See Figure 10 , Figure 10 This is a schematic diagram of the structure of a computer device 60 provided in an embodiment of this application. The computer device 60 includes a processor 601 and a memory 602. The memory 602 is connected to the processor 601, for example, via a bus.

[0101] Processor 601 is configured to support the computer device 60 in performing the corresponding functions in the methods described in the above method embodiments. Processor 601 may be a central processing unit (CPU), a network processor (NP), a hardware chip, or any combination thereof. The aforementioned hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a combination thereof. The aforementioned PLD may be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a generic array logic (GAL), or any combination thereof.

[0102] Memory 602 is used to store program code, etc. Memory 602 may include volatile memory (VM), such as random access memory (RAM); memory 602 may also include non-volatile memory (NVM), such as read-only memory (ROM), flash memory, hard disk drive (HDD), or solid-state drive (SSD); memory 602 may also include combinations of the above types of memory.

[0103] Processor 601 can call the program code to perform the following operations:

[0104] During the first threshold voltage detection process, a first sensed voltage value corresponding to a first sub-pixel in the first pixel is detected. The first pixel includes multiple sub-pixels, and the first sub-pixel is any one of the multiple sub-pixels. The pixel circuit corresponding to the first pixel includes multiple OLED driving circuits, and the multiple OLED driving circuits correspond to the multiple sub-pixels respectively. Each OLED driving circuit includes an OLED and a driving thin-film transistor that drives the OLED. The first threshold voltage detection process is a process of detecting the threshold voltage of the driving thin-film transistor in the first OLED driving circuit. The first OLED driving circuit is the OLED driving circuit corresponding to the first sub-pixel in the first pixel. Each OLED driving circuit is connected to a sensing line through a sensing thin-film transistor, and the first sensed voltage value is used to indicate the voltage on the sensing line.

[0105] If a short circuit is determined in the OLED driving circuit based on the first sensed voltage value, each sub-pixel in the first pixel is compensated based on the second sensed voltage value corresponding to each sub-pixel in the first pixel. The second sensed voltage value corresponding to each sub-pixel in the first pixel is obtained based on the sensed voltage value corresponding to each sub-pixel in the second pixel, where the second pixel is a pixel adjacent to the first pixel.

[0106] This application also provides a computer-readable storage medium storing a computer program, the computer program including program instructions, which, when executed by a computer, cause the computer to perform the method described in the foregoing embodiments.

[0107] Those skilled in the art will understand that all or part of the processes in the above embodiments can be implemented by a computer program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. The storage medium can be a magnetic disk, optical disk, read-only memory (ROM), or random access memory (RAM), etc.

[0108] The above-disclosed embodiments are merely preferred embodiments of this application and should not be construed as limiting the scope of this application. Therefore, any equivalent variations made in accordance with the claims of this application shall still fall within the scope of this application.

Claims

1. A pixel compensation method, characterized in that, include: During the first threshold voltage detection process, the first sensed voltage value corresponding to the first sub-pixel in the first pixel is detected; The first pixel includes multiple sub-pixels, and the first sub-pixel is any one of the multiple sub-pixels. The pixel circuit corresponding to the first pixel includes multiple OLED driving circuits, and the multiple OLED driving circuits correspond to the multiple sub-pixels respectively. Each OLED driving circuit includes an OLED and a driving thin-film transistor that drives the OLED. The first threshold voltage detection process is a process of detecting the threshold voltage of the driving thin-film transistor in the first OLED driving circuit. The first OLED driving circuit is the OLED driving circuit corresponding to the first sub-pixel in the first pixel. Each OLED driving circuit is connected to a sensing line through a sensing thin-film transistor, and the first sensing voltage value is used to indicate the voltage on the sensing line. If a short circuit is determined in the OLED driving circuit based on the first sensed voltage value, each sub-pixel in the first pixel is compensated based on the second sensed voltage value corresponding to each sub-pixel in the first pixel. The second sensed voltage value corresponding to each sub-pixel in the first pixel is obtained based on the sensed voltage value corresponding to each sub-pixel in the second pixel, where the second pixel is a pixel adjacent to the first pixel.

2. The method according to claim 1, characterized in that, The method further includes: If a short circuit is determined in the OLED driving circuit based on the first sensed voltage value, the threshold voltage detection process corresponding to the second sub-pixel in the first pixel is skipped. The second sub-pixel is the sub-pixel in the first pixel that has not yet undergone threshold voltage detection.

3. The method according to claim 1, characterized in that, The method further includes: After detecting the induced voltage value corresponding to each sub-pixel in the first pixel, and determining that the OLEDs in the pixel circuit corresponding to the first pixel are not short-circuited based on the induced voltage value corresponding to each sub-pixel in the first pixel, compensation is performed on each sub-pixel in the first pixel based on the induced voltage value corresponding to each sub-pixel in the first pixel.

4. The method according to claim 1, characterized in that, Before compensating each sub-pixel of the first pixel based on the second induced voltage value corresponding to each sub-pixel of the first pixel, the method further includes: If the first sensed voltage value is greater than or equal to a preset voltage threshold, then the OLED driving circuit of the first OLED is determined to be short-circuited.

5. The method according to any one of claims 1-4, characterized in that, Before compensating each sub-pixel of the first pixel based on the second induced voltage value corresponding to each sub-pixel of the first pixel, the method further includes: Obtain the induced voltage value corresponding to the target sub-pixel in each second pixel, wherein the target sub-pixel is any sub-pixel to be compensated; The average value of the sensed voltage corresponding to the target sub-pixel in each second pixel is determined as the second sensed voltage value corresponding to the target sub-pixel in the first pixel.

6. The method according to any one of claims 1-4, characterized in that, The detection of the first sensed voltage value corresponding to the first sub-pixel in the first pixel includes: Detect the induced voltage on the sensing line; The induced voltage on the induction line is converted from analog to digital to obtain the first induced voltage value.

7. The method according to any one of claims 1-4, characterized in that, Both the first pixel and the second pixel belong to the target OLED display panel; The method further includes: After detecting the induced voltage value corresponding to each pixel in the target OLED display panel, a defect code corresponding to the target OLED display panel is generated based on the induced voltage value corresponding to each pixel. The defect code is used to indicate the pixel defect status of the target OLED display panel. Based on the defect code, a compensation algorithm for the target OLED display panel is determined.

8. A pixel compensation device, characterized in that, include: The voltage detection module is used to detect the first induced voltage value corresponding to the first sub-pixel in the first pixel during the first threshold voltage detection process; The first pixel includes multiple sub-pixels, and the first sub-pixel is any one of the multiple sub-pixels. The pixel circuit corresponding to the first pixel includes multiple OLED driving circuits, and the multiple OLED driving circuits correspond to the multiple sub-pixels respectively. Each OLED driving circuit includes an OLED and a driving thin-film transistor that drives the OLED. The first threshold voltage detection process is a process of detecting the threshold voltage of the driving thin-film transistor in the first OLED driving circuit. The first OLED driving circuit is the OLED driving circuit corresponding to the first sub-pixel in the first pixel. Each OLED driving circuit is connected to a sensing line through a sensing thin-film transistor, and the first sensing voltage value is used to indicate the voltage on the sensing line. The pixel compensation module is used to compensate each sub-pixel of the first pixel according to the second induced voltage value corresponding to each sub-pixel of the first pixel when it is determined that the OLED in the first OLED driving circuit is short-circuited according to the first induced voltage value. The second induced voltage value corresponding to each sub-pixel of the first pixel is obtained based on the induced voltage value corresponding to each sub-pixel of the second pixel, where the second pixel is a pixel adjacent to the first pixel.

9. A computer device, characterized in that, The device includes a memory and a processor, the memory being connected to the processor, the processor being configured to execute one or more computer programs stored in the memory, and the processor, when executing the one or more computer programs, causing the computer device to perform the method as described in any one of claims 1-7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program, the computer program including program instructions that, when executed by a processor, cause the processor to perform the method as described in any one of claims 1-7.

11. A display panel, characterized in that, It includes a compensation chip and a plurality of pixel circuits connected to the compensation chip, the compensation chip being used to perform the method as described in any one of claims 1-7.

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