Detection method and debugging method of display panel, display panel, detection device

Abstract

The application relates to a display panel detection method, a display panel debugging method, a display panel, a detection device, computer equipment, a computer readable storage medium, and a computer program product. The method comprises the following steps: obtaining a first node voltage and a second node voltage of a target color pixel circuit of a target pixel column; adjusting data voltages respectively connected to each target color pixel circuit in the target pixel column according to the first node voltage and the second node voltage, so that preset voltages of a plurality of pixel circuits of the target color are the same, wherein the preset voltage is a difference between the connected data voltage of the target color pixel circuit and a voltage of a node connected to the target color pixel circuit and a detection signal line; and detecting a plurality of target color pixel circuits of the target pixel column to obtain detection data of each target color pixel circuit. The accuracy of the detection result can be improved.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a detection method, debugging method, display panel, detection device, computer equipment, computer-readable storage medium, and computer program product for a display panel. Background Technology

[0002] Active-matrix organic light-emitting diode (AMOLED) displays use organic materials to create light-emitting devices and thin-film transistors to construct the pixel circuits that drive these devices to emit light. The pixel circuit includes driving transistors. Due to manufacturing processes, device aging, and other factors, the characteristics of the driving transistors within the pixel circuit change, and different driving transistors exhibit different characteristics, leading to uneven display performance. Therefore, it is necessary to detect the characteristics of the driving transistors to ensure accurate driving current.

[0003] However, in the prior art, the detection results obtained by detecting the driving transistor are inaccurate. Summary of the Invention

[0004] Therefore, it is necessary to provide a display panel detection method, debugging method, display panel, detection device, computer equipment, computer-readable storage medium, and computer program product that can improve the accuracy of the detection results of the display panel in response to the above-mentioned technical problems.

[0005] A first aspect of this application provides a detection method for a display panel, the display panel including multiple pixel columns, each pixel column including multiple pixel circuits, the multiple pixel circuits in the same column being connected to a detection module via the same detection signal line, the method including: acquiring a first node voltage and a second node voltage in a target pixel column, wherein the first node voltage is the voltage of the connection node between the farthest target color pixel circuit relative to the detection module and the detection signal line in the target pixel column, and the second node voltage is the voltage of the connection node between the closest target color pixel circuit relative to the detection module and the detection signal line in the target pixel column; adjusting the data voltage connected to each target color pixel circuit in the target pixel column according to the first node voltage and the second node voltage, so that the preset voltages of the multiple target color pixel circuits are the same, wherein the preset voltage is the difference between the data voltage connected to the target color pixel circuit and the voltage of the connection node between the target color pixel circuit and the detection signal line; and detecting the multiple target color pixel circuits in the target pixel column to obtain detection data for each target color pixel circuit.

[0006] In some embodiments, adjusting the data voltage connected to each target color pixel circuit in the target pixel column according to the first node voltage and the second node voltage, so that the preset voltages of the multiple target color pixel circuits are the same, includes:

[0007] The maximum voltage difference is determined based on the voltage of the first node and the voltage of the second node;

[0008] The voltage step size is determined based on the maximum voltage difference and the number of target color pixel circuits in the target pixel column;

[0009] Obtain the reference data voltage corresponding to the reference pixel circuit of the target color in the target pixel column;

[0010] Based on the position of the current detection pixel circuit in the target pixel column relative to the reference pixel circuit, at least one voltage step is adjusted on the basis of the reference data voltage as the data voltage of the current detection pixel circuit.

[0011] In some embodiments, adjusting at least one voltage step size as the data voltage of the current detection pixel circuit based on the position of the current detection pixel circuit relative to the reference pixel circuit in the target pixel column includes:

[0012] The currently detected pixel circuit is determined to be the i-th target color pixel circuit relative to the reference pixel circuit;

[0013] Based on the reference data voltage, the voltage is adjusted by i steps for the current detection pixel circuit to determine the data voltage accessed by the current detection pixel circuit, where 1≤i≤n-1, and n is the number of pixel circuits for the target color of the target pixel column.

[0014] In some embodiments, the current detection pixel circuit is the i-th target color pixel circuit that is closer to the detection module than the reference pixel circuit;

[0015] The voltage voltage is reduced by i steps from the reference data voltage to obtain the current data voltage of the detection pixel circuit.

[0016] When the current detection pixel circuit is the i-th target color pixel circuit set on the side away from the detection module relative to the reference pixel circuit;

[0017] The reference data voltage is increased by i voltage steps to obtain the current data voltage for the detection pixel circuit.

[0018] In some embodiments, the detection method for the display panel further includes: acquiring detection data of each pixel circuit, and obtaining updated detection data of each pixel circuit based on the detection data of each pixel circuit and a preset conversion coefficient.

[0019] In some embodiments, the detection method for the display panel further includes: obtaining the preset conversion coefficient through multiple test circuits;

[0020] The process of obtaining the preset conversion coefficient through multiple test circuits includes:

[0021] The multiple test circuits are detected under a first preset condition to obtain multiple first test data, wherein the first preset condition includes controlling the current output by the multiple test circuits to be greater than a preset value.

[0022] Multiple test circuits are detected under a second preset condition to obtain multiple second test data, wherein the second preset condition includes controlling the current output by the multiple test circuits to be less than or equal to the preset value;

[0023] The preset conversion coefficients are determined based on the functional relationship between the plurality of first test data and the plurality of second test data.

[0024] In some embodiments, the pixel circuit includes a driving transistor, and the connection node between the pixel circuit and the detection signal line is the connection node between the target electrode of the driving transistor and the detection signal line. The gate of the driving transistor is used to connect the data voltage, wherein the target electrode is the source or drain of the driving transistor.

[0025] In some embodiments, the detection method for the display panel further includes: resetting all target color pixel circuits of the target pixel column before detecting the plurality of target color pixel circuits of the target pixel column;

[0026] After obtaining the detection data of each target color pixel circuit in the target pixel column, each target color pixel circuit in the target pixel column is reset.

[0027] In some embodiments, the display panel includes at least one gating module, the gating module including at least one gating switch, each gating switch being disposed between a detection signal line connected to a column of pixel circuitry and the detection module;

[0028] In some embodiments, detecting multiple pixel circuits of the target pixel column to obtain detection data for each pixel circuit includes:

[0029] Turn on the gating switch corresponding to the target pixel column, and detect each pixel circuit on the target pixel column in sequence to obtain the detection data of each pixel circuit;

[0030] After all pixel circuits on the target pixel column have been detected, the column containing the undetected pixel circuits on the display panel is taken as the new target pixel column. The corresponding selection switch of the target pixel column is turned on, and the detection data of each pixel circuit on the target pixel column is obtained in turn. This process continues until all pixel circuits on the display panel have been detected.

[0031] In some embodiments, the detection data includes a detection voltage output by the detection module, which is related to the drive current of the current detection pixel circuit under the preset voltage.

[0032] A second aspect of this application provides a debugging method for a display panel, wherein the detection data voltage of each of the currently detected pixel circuits in a target pixel column is obtained according to the aforementioned detection method;

[0033] Determine whether the detection data of the current detection pixel circuit under the detection data voltage exceeds the standard detection data range;

[0034] If the data exceeds the standard detection data range, the data voltage connected to the current detection pixel circuit is adjusted at least once until the detection data of the current detection pixel circuit reaches the standard detection data range. The position and total adjustment amount of the current detection pixel circuit are recorded.

[0035] If the standard detection data range is not exceeded, the position and adjustment amount of the current detection pixel circuit are recorded as 0.

[0036] In some embodiments, the step of adjusting the data voltage connected to the currently detected pixel circuit at least once if the standard detection data range is exceeded includes:

[0037] If the detection data of the current detection pixel circuit is greater than the upper limit of the standard detection data range, then a first adjustment amount is determined based on the difference between the detection data of the current detection pixel circuit and the upper limit of the standard detection data range.

[0038] Based on the data voltage of the current detection pixel circuit, the first adjustment amount is reduced as the updated data voltage of the current detection pixel circuit;

[0039] If the detection data of the current detection pixel circuit is less than the lower limit of the standard detection data range, then a second adjustment amount is determined based on the difference between the detection data of the current detection pixel circuit and the lower limit of the standard detection data range.

[0040] Based on the data voltage of the current detection pixel circuit, the second adjustment amount is increased as the updated data voltage of the current detection pixel circuit.

[0041] In some embodiments, the debugging method for the display panel further includes:

[0042] The total adjustment amount of the correction pixel circuit is determined based on at least one first adjustment amount and / or at least one second adjustment amount of the correction pixel circuit, wherein the correction pixel circuit is the pixel circuit whose detection data after adjusting the data voltage reaches the standard detection data range of the current detection pixel circuit.

[0043] The position of each correction pixel circuit and the total adjustment amount corresponding to each correction pixel circuit are recorded as a compensation voltage lookup table.

[0044] In some embodiments, the debugging method for the display panel further includes:

[0045] Acquire detection data of each pixel circuit of the display panel;

[0046] The value with the highest probability of occurrence in the detection data of each pixel circuit of the display panel or the average value of the detection data of each pixel circuit in the preset area in the center of the display panel is used as the standard detection data.

[0047] The standard detection data range is obtained based on the standard detection data.

[0048] In some embodiments, the detection data includes a detection voltage output by the detection module, which is related to the drive current of the current detection pixel circuit under the preset voltage.

[0049] A third aspect of this application provides a display panel, comprising: multiple pixel columns, each pixel column including multiple pixel circuits, a detection module, and a processing module; multiple pixel circuits in the same column being connected to the detection module via the same detection signal line; and the processing module being connected to each pixel circuit and the detection module respectively, wherein:

[0050] The processing module is configured as follows:

[0051] The first node voltage and the second node voltage in the target pixel column are obtained, wherein the first node voltage is the voltage of the node in the target pixel column that connects the target color pixel circuit and the detection signal line relative to the farthest end of the detection module, and the second node voltage is the voltage of the node in the target pixel column that connects the target color pixel circuit and the detection signal line relative to the nearest end of the detection module.

[0052] Based on the first node voltage and the second node voltage, the data voltage connected to each target color pixel circuit in the target pixel column is adjusted so that the preset voltages of multiple target color pixel circuits are the same. The preset voltage is the difference between the data voltage connected to the target color pixel circuit and the voltage of the target color pixel circuit and the connection node of the detection signal line.

[0053] Multiple target color pixel circuits in the target pixel column are detected to obtain detection data for each target color pixel circuit.

[0054] A fourth aspect of this application provides a detection device for a display panel, the display panel including multiple pixel columns, each pixel column including multiple pixel circuits, the multiple pixel circuits in the same column being connected to a detection module via the same detection signal line, the device comprising:

[0055] The data acquisition module is used to acquire the first node voltage and the second node voltage in the target pixel column, wherein the first node voltage is the voltage of the node connecting the target color pixel circuit and the detection signal line at the farthest end of the target color pixel circuit relative to the detection module in the target pixel column, and the second node voltage is the voltage of the node connecting the target color pixel circuit and the detection signal line at the nearest end of the target color pixel circuit relative to the detection module in the target pixel column;

[0056] A voltage adjustment module is used to adjust the data voltage connected to each target color pixel circuit in the target pixel column according to the first node voltage and the second node voltage, so that the preset voltage of multiple target color pixel circuits is the same, wherein the preset voltage is the difference between the data voltage connected to the target color pixel circuit and the voltage of the target color pixel circuit and the connection node of the detection signal line;

[0057] The data detection module is used to detect multiple target color pixel circuits in the target pixel column and obtain detection data for each target color pixel circuit.

[0058] A fifth aspect of this application provides a computer device, including a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement the aforementioned detection method and / or debugging method for the display panel.

[0059] A sixth aspect of this application provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the aforementioned detection method and / or debugging method for a display panel.

[0060] A seventh aspect of this application provides a computer program product, the computer program product including a computer program that, when executed by a processor, implements the aforementioned display panel detection method and / or display panel debugging method.

[0061] The aforementioned detection method, debugging method, display panel, detection device, computer equipment, computer-readable storage medium, and computer program product for a display panel are described. The method is applied to a display panel comprising multiple pixel columns, each pixel column comprising multiple pixel circuits. Multiple pixel circuits in the same column are connected to a detection module via the same detection signal line. The method first obtains the first node voltage and the second node voltage of the target color pixel circuit in the target pixel column. The first node voltage is the voltage of the node in the target pixel column where the target color pixel circuit furthest from the detection module is connected to the detection signal line. The second node voltage is the voltage of the node in the target pixel column closest to the detection module that is connected to the detection signal line. This yields the first node voltage corresponding to the target color pixel circuit furthest from the detection module in the target pixel column to be detected, and the second node voltage corresponding to the target color pixel circuit closest to the detection module in the target pixel column to be detected. Because the detection signal line has line impedance, there is a voltage drop between the first node voltage and the second node voltage due to the line impedance. This voltage drop can lead to inaccurate detection results. Therefore, based on the first node voltage and the second node voltage, the data voltage connected to each target color pixel circuit in the target pixel column is adjusted to make the preset voltage of multiple target color pixel circuits the same. The preset voltage is the difference between the data voltage connected to the target color pixel circuit and the voltage of the node connecting the target color pixel circuit and the detection signal line. By adjusting the data voltage connected to each target color pixel circuit in the target pixel column, each pixel circuit has the same preset voltage, which solves the problem of different preset voltages of each target color pixel circuit caused by the voltage drop due to the impedance of the detection signal line, and ensures that each target color pixel circuit is in the same driving state. Then, multiple target color pixel circuits in the target pixel column are detected to obtain detection data related to the driving characteristics of each target color pixel circuit. Since the detection data obtained at this time is obtained under the condition that each target color pixel circuit is in the same driving state, the detection data of each target color pixel circuit is not affected by the voltage drop caused by the impedance of the detection signal line. It can accurately characterize the characteristic differences of the driving current between each target color pixel circuit. This difference is only affected by the characteristic of the driving current of the target color pixel circuit itself, and is not affected by the voltage drop caused by the line impedance of the detection signal line. Therefore, the detection result is more accurate. Attached Figure Description

[0062] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the accompanying drawings used in the description of the embodiments or the conventional technology will be briefly introduced below.

[0063] It is readily apparent that the accompanying drawings described below are merely some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without any creative effort.

[0064] Figure 1 This is a flowchart illustrating a detection method for a display panel in one embodiment;

[0065] Figure 2 This is a schematic diagram of a display panel in one embodiment;

[0066] Figure 3 This is a flowchart illustrating a method for adjusting data voltage in one embodiment;

[0067] Figure 4 This is a flowchart illustrating a method for adjusting data voltage in another embodiment;

[0068] Figure 5 This is a flowchart illustrating a method for calculating conversion factors in one embodiment;

[0069] Figure 6 This is a plotted diagram of the test circuit in one embodiment;

[0070] Figure 7 This is a schematic diagram of the display panel in another embodiment;

[0071] Figure 8 This is a flowchart illustrating a method for detecting reset in one embodiment;

[0072] Figure 9 This is a second schematic diagram of the display panel in another embodiment;

[0073] Figure 10 This is a flowchart illustrating a detection method in one embodiment;

[0074] Figure 11 This is a third schematic diagram of the display panel in another embodiment;

[0075] Figure 12 This is a schematic diagram of the detection process in one embodiment;

[0076] Figure 13 This is a flowchart illustrating a debugging method for a display panel in one embodiment;

[0077] Figure 14 This is a flowchart illustrating a method for adjusting data voltage in another embodiment;

[0078] Figure 15 This is a flowchart illustrating a method for adjusting data voltage in yet another embodiment;

[0079] Figure 16 This is a flowchart illustrating a method for determining a standard detection data range in one embodiment;

[0080] Figure 17 This is a flowchart illustrating a method for determining a standard detection data range in another embodiment;

[0081] Figure 18 This is a schematic diagram of the display panel structure in one embodiment;

[0082] Figure 19 This is a second schematic diagram of the display panel structure in one embodiment;

[0083] Figure 20 This is a circuit diagram of the display panel in one embodiment;

[0084] Figure 21 This is a timing diagram of the circuit driving of the display panel in one embodiment;

[0085] Figure 22 This is a schematic diagram of the structure of the detection device for the display panel in one embodiment;

[0086] Figure 23 This is an internal structural diagram of a computer device in one embodiment.

[0087] Explanation of reference numerals in the attached figures:

[0088] 10-Pixel column, 20-Pixel circuit, 30-Detection module, 100-Detection signal line, 40-Gating module, 200-Data signal line, 50-Processing module. Detailed Implementation

[0089] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0090] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0091] It is understood that the terms “first,” “second,” etc., used in this application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another.

[0092] It should be noted that when one element is considered to be "connected" to another element, it can be directly connected to the other element or connected to the other element through an intermediary element. Furthermore, in the following embodiments, "connection" should be understood as "electrical connection," "communication connection," etc., if there is transmission of electrical signals or data between the connected objects.

[0093] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising / including” or “having,” etc., specify the presence of the stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. Meanwhile, the term “and / or” as used in this specification includes any and all combinations of the associated listed items.

[0094] The detection method for a display panel provided in this application embodiment, when applied in a display panel, can provide a method for adjusting the data voltage connected to each target color pixel circuit on a target pixel column, thereby ensuring that the detection results obtained by detecting multiple target color pixel circuits in the target pixel column are not affected by the voltage drop caused by the impedance of the detection signal line, thus improving the accuracy of the detection results.

[0095] The detection methods used in related display panels suffer from inaccurate results. The inventors have determined that this problem arises because, during detection, multiple pixel circuits in the same column are connected to the detection module via the same detection signal line. During detection, the detection module locks the potential of the detection line and assumes this potential as the potential of the driving transistor. The same data voltage is then input to the multiple pixel circuits in the same column to ensure all driving transistors have the same detection modulation. However, the detection signal line itself has line impedance. Since the potential locked by the detection module is a fixed value, the actual potential of the driving transistors at different locations will be higher than the locked potential. Under the same data voltage, the detection modulation of the driving transistors at different locations will differ, thus causing the detection results to be affected by the line impedance and become inaccurate.

[0096] Based on the above-mentioned technical problems, the inventors discovered that by adjusting the data voltage connected to each target color pixel circuit on the target pixel column, the detection results obtained by detecting multiple target color pixel circuits in the target pixel column are not affected by the voltage drop caused by the line impedance of the detection signal line. This ensures that multiple target color pixel circuits have the same detection conditions and improves the accuracy of the detection results.

[0097] In one embodiment, such as Figure 1As shown, a method for detecting a display panel is provided. A schematic diagram of the display panel is shown below. Figure 2 As shown, the display panel includes multiple pixel columns 10, and each pixel column 10 includes multiple pixel circuits 20. Multiple pixel circuits 20 in the same column are connected to the detection module 30 through the same detection signal line 100. The method includes steps S100-S120.

[0098] Step S100: Obtain the voltage of the first node and the voltage of the second node in the target pixel column.

[0099] The first node voltage is the voltage at the node connecting the farthest target color pixel circuit to the detection signal line in the target pixel column relative to the detection module. The second node voltage is the voltage at the node connecting the closest target color pixel circuit to the detection signal line in the target pixel column. Due to the line impedance of the detection signal line, there is an IR-Drop phenomenon between the connection nodes of different pixel circuits on the same detection signal line, resulting in some differences in the voltage of the connection nodes corresponding to different pixel circuits on the same detection signal line. Since the first node voltage is the voltage of the node connecting the farthest target color pixel circuit to the detection module in the target pixel column, the line impedance between the first node and the detection module is the largest in the same pixel column, making the first node voltage the largest among all node voltages in that pixel column. Conversely, since the second node voltage is the voltage of the node connecting the closest target color pixel circuit to the detection module in the target pixel column, the line impedance between the second node and the detection module is the smallest in the same pixel column, making the measured second node voltage the smallest among all node voltages in that pixel column.

[0100] Step S110: Based on the first node voltage and the second node voltage, adjust the data voltage connected to each target color pixel circuit in the target pixel column so that the preset voltages of multiple target color pixel circuits are the same.

[0101] The preset voltage is the difference between the data voltage connected to the target color pixel circuit and the voltage at the connection node between the target color pixel circuit and the detection signal line.

[0102] Since the impedance on the detection signal line is uniformly distributed, the impedance change is linear. After determining the maximum first node voltage and the minimum second node voltage on the same pixel column, the node voltages of each pixel circuit between the first and second nodes change linearly. Therefore, the node voltages of each pixel circuit between the first and second nodes can be determined based on the first and second node voltages. After determining the node voltages corresponding to each target color pixel circuit in the target pixel column, adjusting the data voltages connected to each target color pixel circuit in the target pixel column will make the preset voltages of multiple target color pixel circuits in the target pixel column the same. Having the preset voltages of multiple target color pixel circuits in the target pixel column the same ensures that the multiple target color pixel circuits in the target pixel column are in the same driving state, eliminating the influence of the detection signal line impedance on the driving state of the pixel circuits.

[0103] Step S120: Detect multiple target color pixel circuits in the target pixel column to obtain detection data for each target color pixel circuit.

[0104] In this method, data voltages can be sequentially supplied to multiple target color pixel circuits in the target pixel column to obtain the driving current output by the pixel circuit. Then, calculations can be performed based on the driving current to obtain the detection data of the pixel circuit, thereby realizing the detection of the pixel circuit.

[0105] Among them, the detection data of the current detection pixel circuit is related to the driving current of the current detection pixel circuit. The detection data can be understood as comprehensive data that characterizes all factors in the pixel circuit that affect the driving current, such as the threshold voltage, mobility, impedance and other factors of the driving transistor in the pixel circuit.

[0106] In a pixel column, the target color pixel circuit can have at least one of red, green, or blue pixels. If all pixels in a pixel column are the same color, then the target color pixel circuit is all the pixel circuits in that column. If a pixel column contains pixels of different colors (e.g., red, green, and blue pixels), the target color pixel circuit can be any of the red, green, or blue pixel circuits in that column. In other words, multiple target color pixel circuits are multiple pixel circuits with the same color.

[0107] In this embodiment, the method adjusts the data voltage connected to each target color pixel circuit in the target pixel column according to the first node voltage and the second node voltage, so that the preset voltages of multiple target color pixel circuits in the target pixel column are the same. This solves the problem of different preset voltages of each target color pixel circuit caused by the voltage drop due to line impedance. Furthermore, by making the preset voltages of each target color pixel circuit the same, it ensures that each target color pixel circuit is in the same driving state. Then, the multiple target color pixel circuits in the target pixel column are detected to obtain the detection data of each target color pixel circuit. Since the detection data obtained at this time is obtained under the condition that each target color pixel circuit is in the same driving state, the detection data of each target color pixel circuit is not affected by the voltage drop caused by the line impedance of the detection signal line. It can accurately characterize the characteristic differences of the driving current between each target color pixel circuit. This difference is only affected by the characteristic of the driving current of the target color pixel circuit itself, and is not affected by the voltage drop caused by the line impedance of the detection signal line. Therefore, the detection result is more accurate.

[0108] In one embodiment, such as Figure 3 As shown, step S110 involves adjusting the data voltage connected to each target color pixel circuit in the target pixel column according to the first node voltage and the second node voltage, so that the preset voltages of the multiple pixel circuits of the target color are the same. This includes steps S300-S330.

[0109] Step S300: Determine the maximum voltage difference based on the voltage of the first node and the voltage of the second node.

[0110] Specifically, the maximum preset voltage between nodes of each pixel circuit between the first and second nodes can be determined based on the first node voltage and the second node voltage. The difference between the first voltage and the second node voltage is the maximum voltage difference between nodes corresponding to the target color pixel circuit on the same detection signal line.

[0111] For example, the maximum pressure difference is calculated using the following formula:

[0112] ΔV=V1-V2

[0113] Where ΔV is the maximum voltage difference, V1 is the voltage at the first node, and V2 is the voltage at the second node.

[0114] Step S310: Determine the voltage step size based on the maximum voltage difference and the number of target color pixel circuits in the target pixel column.

[0115] Since the impedance on the detection signal line is uniformly distributed, the impedance change is linear. After determining the maximum first node voltage and the minimum second node voltage on the same pixel column, the node voltage of each pixel circuit between the first node and the second node changes linearly. Therefore, the voltage step size can be determined based on the maximum voltage difference and the number of target color pixel circuits in the target pixel column.

[0116] For example, the voltage step size is calculated using the following formula:

[0117] ΔV0=ΔV / (N-1)

[0118] Where ΔV0 is the voltage step size, ΔV is the maximum voltage difference, and N is the number of target color pixel circuits in the target pixel column.

[0119] Step S320: Obtain the reference data voltage corresponding to the reference pixel circuit of the target color in the target pixel column.

[0120] In this process, any target color pixel circuit in the target pixel column can be selected as the reference pixel circuit, and its corresponding reference data voltage can be set. The data voltages of the target color pixel circuits in the remaining target pixel columns can be adjusted based on their positions relative to the reference pixel circuit and the reference data voltage.

[0121] Step S330: Based on the position of the current detection pixel circuit in the target pixel column relative to the reference pixel circuit, adjust at least one voltage step size on the basis of the reference data voltage as the data voltage of the current detection pixel circuit.

[0122] In this process, the position of the currently detected pixel circuit relative to the reference pixel circuit within the target pixel column is determined by identifying which pixel circuit it is relative to the reference circuit. Based on this pixel number, the voltage step size is adjusted from the reference data voltage to obtain the data voltage of the currently detected pixel circuit. However, during adjustment, it's necessary to determine whether the voltage step size should be increased or decreased based on whether the currently detected pixel circuit is positioned closer to the detection module than the reference pixel circuit.

[0123] For example, the data voltage of the current detection pixel circuit is determined by the following formula:

[0124] Vdata(n)=Vdata(k)+(nk)·ΔV / (N-1)

[0125] Where Vdata(n) is the data voltage of the currently detected pixel circuit, Vdata(k) is the reference data voltage, n is the position number of the currently detected pixel circuit, and k is the position number of the reference pixel circuit. The position numbers of the pixel circuits in the same column increase sequentially from the closest to the detection module to the furthest from the detection module. ΔV is the maximum voltage difference, and N is the number of target color pixel circuits in the target pixel column.

[0126] For example, in this embodiment, if the voltage of the first node is 0.89V and the voltage of the second node is 0.91V, then the maximum voltage difference is 0.91-0.89=0.02V. If the pixel circuits in this pixel column are all the same color and there are eleven of them, then the voltage step size is 0.02 / 10=0.002V. Assuming that the data voltage corresponding to the pixel circuit numbered 1 is set to 1.49V, then the data voltage corresponding to the pixel circuit numbered 2 is 1.492V, then the data voltage corresponding to the pixel circuit numbered 3 is 1.494V, and so on until the data voltage corresponding to the pixel circuit numbered 11 is 1.51V.

[0127] In this embodiment, based on the position of the current detection pixel circuit in the target pixel column relative to the reference pixel circuit, at least one voltage step is adjusted on the basis of the reference data voltage to obtain the data voltage corresponding to the current detection pixel circuit, thereby realizing the adjustment of the data voltage.

[0128] In one embodiment, such as Figure 4 As shown, step S330 involves adjusting at least one voltage step based on the reference data voltage, according to the position of the current detection pixel circuit relative to the reference pixel circuit in the target pixel column, as the data voltage of the current detection pixel circuit. This includes steps S400-S410.

[0129] Step S400: Determine that the current detection pixel circuit is the i-th target color pixel circuit relative to the reference pixel circuit.

[0130] In this system, the pixel circuits in the same column are numbered sequentially from the closest to the detection module to the furthest from the detection module, with the number increasing by 1 each time. For example, if the reference pixel circuit is the first target color pixel circuit closest to the detection module, then the reference pixel circuit is numbered 1. If the currently detected pixel circuit is the fifth target color pixel circuit closest to the detection module, then the reference pixel circuit is numbered 5. The currently detected pixel circuit is the fourth target color pixel circuit relative to the reference pixel circuit.

[0131] Step S410: Based on the reference data voltage, adjust the voltage by i steps for the current detection pixel circuit to determine the data voltage connected to the current detection pixel circuit.

[0132] Where 1≤i≤n-1, and n is the number of target color pixel circuits in the target pixel column.

[0133] Optionally, when the current detection pixel circuit is the i-th target color pixel circuit that is closer to the detection module than the reference pixel circuit, the data voltage of the current detection pixel circuit is reduced by i voltage steps based on the reference data voltage.

[0134] For example, if the current detection pixel circuit is numbered 2 and the reference pixel circuit is numbered 5, then i = 3, and the data voltage of the current detection pixel circuit is determined by the following formula:

[0135] Vdata(2)=Vdata(5)+(2-5)·ΔV / (N-1)

[0136] Where Vdata(2) is the data voltage of the current detection pixel circuit, Vdata(5) is the reference data voltage, 2 is the position number of the current detection pixel circuit, 5 is the position number of the reference pixel circuit, ΔV is the maximum voltage difference, and N is the number of target color pixel circuits in the target pixel column.

[0137] When the current detection pixel circuit is the i-th target color pixel circuit set on the side furthest from the reference pixel circuit from the detection module, then i voltage steps are added to the reference data voltage as the data voltage of the current detection pixel circuit.

[0138] For example, if the current detection pixel circuit is numbered 5 and the reference pixel circuit is numbered 2, then i = 3, and the data voltage of the current detection pixel circuit is determined by the following formula:

[0139] Vdata(5)=Vdata(2)+(5-2)·ΔV / (N-1)

[0140] Where Vdata(5) is the data voltage of the current detection pixel circuit, Vdata(2) is the reference data voltage, 5 is the position number of the current detection pixel circuit, 2 is the position number of the reference pixel circuit, ΔV is the maximum voltage difference, and N is the number of target color pixel circuits in the target pixel column.

[0141] In this embodiment, since the impedance on the detection signal line is uniformly distributed, the change in impedance is linear. Therefore, based on the position of the current detection pixel circuit in the target pixel column relative to the reference pixel circuit, by adjusting at least one voltage step on the basis of the reference data voltage, the data voltage corresponding to the current detection pixel circuit can be obtained, thus realizing the adjustment of the data voltage.

[0142] In one embodiment, the detection method for the display panel further includes: acquiring detection data of each pixel circuit, and obtaining updated detection data of each pixel circuit based on the detection data of each pixel circuit and a preset conversion coefficient.

[0143] Because the detection module is insensitive to extremely small currents and exhibits significant noise, it's crucial to maximize the detection current to improve the signal-to-noise ratio (SNR). For example, a high detection current in the μA range can improve the SNR of the pixel circuit and yield more accurate detection data. However, in display mode, the pixel circuit's emission current is typically in the nA range, representing a very low current level. Therefore, low-current detection data more closely reflects the actual behavior of the pixel circuit. Thus, using a high current for pixel detection yields more accurate data. Then, a preset conversion coefficient is used to convert this data to low-current level data, providing the converted detection data for each pixel circuit. This converted data is then used to compensate for differences in the driving characteristics of the driving transistors.

[0144] In this embodiment, a large current is used to detect the pixels to obtain more accurate detection data. Then, a preset conversion coefficient is used to convert the detection data into detection data at a low current level, which balances the accuracy of the detection data obtained during detection and the practicality of the detection data.

[0145] In one embodiment, such as Figure 5 As shown, the detection method for the display panel also includes obtaining a preset conversion coefficient through multiple test circuits.

[0146] Obtaining the preset conversion coefficient through multiple test circuits specifically includes steps S500-S520.

[0147] Step S500: Multiple test circuits are detected under a first preset condition to obtain multiple first test data. The first preset condition includes controlling the output current of the multiple test circuits to be greater than or equal to a first preset current value. The test circuits are pixel circuits from the same batch as the pixel circuits in the display panel to be detected. The current output by the test circuits can be greater than a preset value by setting multiple driving transistors in the test circuits to have the same gate voltage. The first preset current value can be 1uA.

[0148] Step S510: Detect multiple test circuits under the second preset conditions to obtain multiple second test data.

[0149] The second preset condition includes controlling the output current of multiple test circuits to be less than or equal to a second preset current value. This can be achieved by setting the gate voltage of the driving transistor in the test circuit, making the output current of the test circuit less than or equal to the second preset current value, which can be 1 nA.

[0150] Step S520: Determine the preset conversion coefficients based on the functional relationship between multiple first test data and multiple second test data.

[0151] After obtaining a large amount of first and second test data for the same test circuit, the functional relationship between the first and second test data for each test circuit can be determined. In this application, the functional relationship between the first and second test data of the test circuit exhibits a direct proportional relationship. Then, based on the conversion coefficients corresponding to a large number of test circuits, a conversion coefficient that best characterizes the conversion relationship between the first and second test data can be obtained as a preset conversion coefficient. For example, it could be the average of the conversion coefficients corresponding to a large number of test circuits, the value with the highest probability of occurrence, or the median, etc.

[0152] Alternatively, after obtaining a large amount of first and second test data for the same test circuit, a first threshold voltage can be calculated based on each first test data point, and a second threshold voltage can be calculated based on each second test data point. This allows the determination of the conversion coefficient between the first and second threshold voltages for each test circuit. Then, based on the conversion coefficients corresponding to a large number of test circuits, a conversion coefficient that best characterizes the conversion relationship between the first and second threshold voltages can be obtained as a preset conversion coefficient. For example, this could be the average of the conversion coefficients corresponding to a large number of test circuits, the value with the highest probability of occurrence, or the median, etc.

[0153] If the threshold voltage is used to calculate the conversion coefficient, the debugging method of this application further includes: after obtaining the detection data, calculating the threshold voltage under the large detection current through the relationship between the detection data and the threshold voltage, then calculating the threshold voltage under the small display current through the conversion coefficient, and calculating the detection data under the small display current through the threshold voltage under the small display current.

[0154] For example, you can refer to Figure 6 , Figure 6 In the diagram, each plotted point represents a test circuit. The horizontal axis represents the second threshold voltage of that test circuit, and the vertical axis represents the first threshold voltage of that test circuit. This can be represented by... Figure 6 In the test circuit, the conversion coefficients corresponding to the plotted points with the most concentrated distribution are used as preset conversion coefficients.

[0155] The conversion factor is calculated using the following formula:

[0156] K = Vth2 / Vth1

[0157] Wherein, Vth1 is the first threshold voltage of the test circuit under the first preset condition, Vth2 is the second threshold voltage of the test circuit under the second preset condition, and K is the conversion coefficient. In this embodiment, the preset conversion coefficient is calculated through pre-calibration, thereby enabling the use of a large current to detect pixels and obtain more accurate detection data. Then, the preset conversion coefficient is used to convert the detection data into detection data at a low current level, thus balancing the accuracy and practicality of the detection data obtained during detection.

[0158] In one embodiment, such as Figure 7 As shown, the pixel circuit includes a driving transistor T1. The connection node between the pixel circuit and the detection signal line 100 is the connection node between the target electrode of the driving transistor T1 and the detection signal line 100. The gate of the driving transistor T1 is used to connect the data voltage.

[0159] The target electrode is either the source or drain of the driving transistor.

[0160] For example, the pixel circuit includes a driving transistor T1, a second transistor T2, a third transistor T3, a light-emitting element D1, and a storage capacitor Cst. The first terminal of the driving transistor T1 is electrically connected to the first power supply line VDD. The second terminal of the driving transistor T1 is electrically connected to the first terminal of the light-emitting element D1 and the first terminal of the third transistor T3, respectively. The second terminal of the light-emitting element D1 is electrically connected to the second power supply line VSS. The second terminal of the third transistor T3 is connected to the detection signal line 100. The second transistor T2 is used to transmit the data voltage on the data signal line 200 to the gate of the driving transistor T1. During the detection process, the gate of the driving transistor T1 maintains a constant data voltage, and the voltage of the second terminal is gradually increased until the current flowing through the driving transistor T1 approaches zero. At this point, the voltage of the second terminal of the driving transistor T1 no longer changes. After the third transistor T3 is turned on, it transmits the voltage of the second terminal of the driving transistor T1 to the detection module outside the pixel circuit through the detection signal line 100, so that the detection module can calculate the detection data of the driving transistor T1 based on the voltage of the second terminal of the driving transistor T1 and the data voltage.

[0161] In this embodiment, the pixel circuit includes a driving transistor T1, and the connection node between the pixel circuit and the detection signal line 100 is the connection node between the target electrode of the driving transistor T1 and the detection signal line 100, thereby providing a specific pixel circuit.

[0162] In one embodiment, such as Figure 8 As shown, the detection method for the display panel also includes steps S800-S810.

[0163] Step S800: Before detecting multiple target color pixel circuits in the target pixel column, reset all target color pixel circuits in the target pixel column.

[0164] Step S810: After obtaining the detection data of each target color pixel circuit in the target pixel column, reset the target color pixel circuit in each target pixel column.

[0165] In this method, before detecting multiple target color pixel circuits in a target pixel column, a black screen can be written to the pixels of multiple target colors in the target pixel column. This is achieved by connecting a reset power supply to the second electrode of the third transistor T3. After detection, a reset voltage is transmitted to the anode of the light-emitting element D1 through the third transistor T3, ensuring that the driving transistors of all pixel circuits are turned off. After detecting each target color pixel circuit in the target pixel column, a black screen is written to each target color pixel circuit again to avoid interference affecting the display of the pixel circuits. Alternatively, after detecting the target pixels in the previous row of two adjacent rows of target pixels and before detecting the target pixels in the next row, the third transistor T3 of both rows of pixel circuits can be turned on simultaneously, writing a black screen to all pixel circuits in both rows.

[0166] In this embodiment, by resetting the target color pixel circuit before and after detection, it is ensured that the detection result is not affected by the previous detection and the display of the pixel circuit is not affected, thus improving the accuracy of the detection result.

[0167] In one embodiment, such as Figure 9 As shown, the display panel includes at least one gating module 40, and the gating module 40 includes at least one gating switch SW. Each gating switch SW is disposed between the detection signal line 100 connected to a column of pixel circuits 20 and the detection module 30.

[0168] like Figure 10 As shown, step S120 involves detecting multiple target color pixel circuits in the target pixel column to obtain detection data for each target color pixel circuit. This includes steps S1000-S1030.

[0169] Step S1000: Turn on the selection switch corresponding to the target pixel column, and detect each pixel circuit on the target pixel column in sequence to obtain the detection data of each pixel circuit.

[0170] One gating module can include multiple gating switches, each of which is connected to a detection signal line. That is, one gating switch corresponds to one pixel column. By turning on the gating switch corresponding to the target pixel column, the detection signal line corresponding to the target pixel column is connected to the detection module. Then, the pixels on the target pixel column are lit up row by row, so that the detection data of each pixel circuit on the target pixel column can be obtained.

[0171] Step S1010: After detecting all pixel circuits in the target pixel column, determine whether there is an undetected column of pixel circuits on the display panel. If there is an undetected column of pixel circuits on the display panel, proceed to step S1020. If there is no undetected column of pixel circuits on the display panel, proceed to step S1030.

[0172] In step S1020, the column containing the undetected pixel circuits on the display panel is designated as the new target pixel column, and the process returns to step S1000.

[0173] Step S1030: Determine that all the pixel circuits in each column of the display panel have been detected.

[0174] In this process, after detecting one column of pixel circuits, the next column of pixel circuits is detected, until all the multiple columns of pixel circuits connected to a gating module have been detected.

[0175] The detection data includes the detection voltage output by the detection module, which is related to the driving current of the current detection pixel circuit under a preset voltage.

[0176] For example, taking a display panel with a real pixel arrangement, i.e., multiple pixels of the same color in the same column, and a gating module 40 including six gating switches (SW1-SW6) as an example, the schematic diagram is as follows. Figure 11 As shown, it can be understood that pixel circuits 20 in the same column are connected to the same data signal line 200, while pixel circuits 20 in the same row are connected to different data signal lines 200, and the data signals input to pixel circuits 20 in the same row are all different. Furthermore, the figure only illustrates the case of one gating module 40. It can be understood that the display panel can include multiple gating modules, each of which is as follows... Figure 11 Connect as shown. (As illustrated) Figure 11The display panel shown assumes that the six gating switches correspond to the following six columns of pixels: the first and second columns are all red pixels (R1, R2), the third and fourth columns are all green pixels (G1, G2), the fifth and sixth columns are all blue pixels (B1, B2). For the next gating module, the seventh and eighth columns are all red pixels (R3, R4), the ninth and tenth columns are all green pixels (G3, G4), the eleventh and twelfth columns are all blue pixels (B3, B4), and so on. The detection process is illustrated in the diagram below. Figure 12 As shown, the detection process for the pixel circuits corresponding to all pixels of the entire display panel during the detection phase is as follows: First frame: Detect the odd-numbered columns of red pixels, that is, detect the pixel circuits of the first column (R1), the seventh column (R3), the thirteenth column (R5), etc. Specifically, detect the red pixels R1, R3, R5, etc. in the first row, then detect the red pixels R1, R3, R5, etc. in the second row, and so on until the red pixels R1, R3, R5, etc. in the last row are detected; Second frame: Detect the even-numbered columns of red pixels, that is, detect the pixel circuits of the second column (R2), the eighth column (R4), the fourteenth column (R6), etc. Specifically, detect the red pixels R2, R4, R6, etc. in the first row, then detect the red pixels R2, R4, R6, etc. in the second row, and so on until the red pixels R2, R4, R6, etc. in the last row are detected. The third frame detects odd-numbered columns of green pixels, the fourth frame detects even-numbered columns of green pixels, the fifth frame detects odd-numbered columns of blue pixels, and the sixth frame detects even-numbered columns of blue pixels. The detection process is exactly the same as for the red pixels described above, and will not be repeated. This process is repeated over six frames. Figure 11 All pixel circuits in the display panel shown have been detected.

[0177] Optionally, if a column of pixels contains pixels of different colors—for example, a column containing red, green, and blue pixels, with the first row being red, the second row green, and the third row blue—then within one frame, the red pixels in the first row are detected first, followed by the green pixels in the second row, then the blue pixels in the third row, and so on until the last row is detected. Even if a column of pixels contains pixels of different colors, the detection of that column is still done row by row, and the detection process is the same as described above, so it will not be repeated here.

[0178] In this embodiment, a specific detection process is provided, which can complete the detection of each pixel circuit of the display panel.

[0179] In one embodiment, such as Figure 13 As shown, a method for debugging a display panel is provided, the method including:

[0180] Step S1300: Obtain the detection data voltage of each of the current detection pixel circuits in the target pixel column according to the detection method in the above embodiment.

[0181] Step S1310: Determine whether the detection data of the current detection pixel circuit under the current input data voltage exceeds the standard detection data range. If the detection data of the current detection pixel circuit exceeds the standard detection data range, proceed to step S1320. If the detection data of the current detection pixel circuit does not exceed the standard detection data range, proceed to step S1330.

[0182] The standard detection data range is a preset range. If the detection data of the currently detected pixel circuit under the current input data voltage is within the standard detection data range, it means that the data voltage of the currently detected pixel circuit meets the standard and no further adjustment is needed. If the detection data of the currently detected pixel circuit under the current input data voltage is outside the standard detection data range, it means that the data voltage of the currently detected pixel circuit needs to be adjusted until it is adjusted so that the detection data of the previously detected pixel circuit meets the standard detection data range.

[0183] Step S1320: Adjust the data voltage connected to the currently detected pixel circuit at least once, and determine whether the detected data of the currently detected pixel circuit after the adjusted data voltage exceeds the standard detection data range. That is, after executing step S1320, return to execute step S1310.

[0184] The process involves adjusting the data voltage connected to the currently detected pixel circuit. This can be done by increasing or decreasing the data voltage, depending on whether the detected data from the pixel circuit exceeds the upper limit or falls below the lower limit of the standard detection data range. After adjusting the data voltage, it is then re-evaluated whether the detected data from the pixel circuit under the current data voltage exceeds the standard detection data range. This process continues until the detected data from the pixel circuit falls within the standard detection data range, at which point the position of the current pixel circuit and the total adjustment amount are recorded.

[0185] Step S1330: Determine that the detection data of the current detection pixel circuit is within the standard detection data range.

[0186] Specifically, if it is determined that the detection data of the current detection pixel circuit under the current input data voltage does not exceed the standard detection data range, then the data voltage of the current detection pixel circuit does not need to be adjusted further. If it is determined in the first execution of step S1310 that the detection data of the current detection pixel circuit under the detection data voltage does not exceed the standard detection data range, then the position and adjustment amount of the current detection pixel circuit are recorded as 0.

[0187] In this embodiment, it is determined whether the detection data of the current detection pixel circuit under the current access data voltage exceeds the standard detection data range. If the detection data of the current detection pixel circuit under the current access data voltage exceeds the standard detection data range, the data voltage accessed by the current detection pixel circuit is adjusted once or multiple times until the detection data of the current detection pixel circuit under the current access data voltage is within the standard detection data range. This achieves the adjustment of the data voltage of the pixel circuit. After the adjustment of all pixel circuits of the display panel in this embodiment is completed, the detection data of all pixel circuits will reach the standard detection data range, thereby improving the uniformity of the display panel.

[0188] In one embodiment, such as Figure 14 As shown, in step S1320, if the detection data of the currently detected pixel circuit exceeds the standard detection data range, the data voltage connected to the currently detected pixel circuit is adjusted at least once, including steps S1400-S1430.

[0189] In step S1400, if the detection data of the current detection pixel circuit is greater than the upper limit of the standard detection data range, then a first adjustment amount is determined based on the difference between the detection data of the current detection pixel circuit and the upper limit of the standard detection data range.

[0190] Specifically, if the current detection data of the pixel circuit is greater than the upper limit of the standard detection data range, it means that the detection data is outside the standard detection data range and the detection data is too large. Therefore, a first adjustment amount is determined. For example, if the current detection data of the pixel circuit is 5V and the standard detection data range is 2V-4V, then the first adjustment amount can be determined as 5V-4V=1V.

[0191] Step S1410 reduces the first adjustment amount based on the current data voltage of the detection pixel circuit, and uses it as the updated data voltage of the current detection pixel circuit.

[0192] If the detected data of the current pixel circuit is greater than the upper limit of the standard detection data range, it means that the data voltage connected to the current pixel circuit is too high. Therefore, after determining the first adjustment amount, the first adjustment amount is reduced based on the current data voltage of the pixel circuit, making the data voltage smaller. The reduced data voltage is used as the updated data voltage of the current pixel circuit. For example, if the original data voltage is 2V, it is reduced by 1V and updated to 1V.

[0193] Step S1420 If the detection data of the current detection pixel circuit is less than the lower limit of the standard detection data range, then determine the second adjustment amount based on the difference between the detection data of the current detection pixel circuit and the lower limit of the standard detection data range.

[0194] If the current detection data of the pixel circuit is less than the lower limit of the standard detection data range, it means that the detection data is outside the standard detection data range and the detection data is too small. Therefore, a second adjustment amount is determined. For example, if the current detection data of the pixel circuit is 1V and the standard detection data range is 2V-4V, then the first adjustment amount can be determined as 2V-1V=1V.

[0195] Step S1430: Based on the current data voltage of the detection pixel circuit, increase the second adjustment amount as the updated data voltage of the current detection pixel circuit.

[0196] If the detected data of the current pixel circuit is less than the lower limit of the standard detection data range, it means that the data voltage connected to the current pixel circuit is too low. Therefore, after determining the second adjustment amount, the second adjustment amount is increased based on the current data voltage of the pixel circuit, making the data voltage larger. The increased data voltage is used as the updated data voltage of the current pixel circuit. For example, if the original data voltage is 2V, it is increased by 1V to update to 3V.

[0197] In this embodiment, if the detection data of the current pixel circuit is greater than the upper limit of the standard detection data range, the data voltage is decreased; if the detection data of the current pixel circuit is less than the lower limit of the standard detection data range, the data voltage is increased, until the detection data of the current pixel circuit is within the standard detection data range. This achieves adjustment of the detection data of the currently detected pixel circuit.

[0198] In one embodiment, such as Figure 15 As shown, the debugging method for the display panel also includes steps S1500-S1510.

[0199] Step S1500: Determine the total adjustment amount of the correction pixel circuit based on at least one first adjustment amount and / or at least one second adjustment amount of the correction pixel circuit.

[0200] Among them, the correction pixel circuit is the pixel circuit that ensures the detected data of the current detection pixel circuit reaches the standard detection data range after adjusting the data voltage.

[0201] When adjusting the correction pixel circuit, there may be instances where the adjustment is insufficient on the first attempt. This means there may be multiple first adjustment values ​​and / or multiple second adjustment values. For example, if the second adjustment value in the first adjustment is +0.015V, but the detected data of the pixel circuit is still below the lower limit of the standard detected data range after adjustment, then the second adjustment value in the second adjustment is +0.006V. If the detected data of the pixel circuit is still below the lower limit of the standard detected data range, then the second adjustment value in the third adjustment is +0.003V. If the detected data of the pixel circuit is still below the lower limit of the standard detected data range, then the second adjustment value in the fourth adjustment is +0.001V. The total adjustment value is:

[0202] 0.015V+0.006V+0.003V+0.001V=0.025V.

[0203] Step S1510: Record the position of each correction pixel circuit and the total adjustment amount corresponding to each correction pixel circuit as a compensation voltage lookup table.

[0204] After determining the total adjustment amount corresponding to each correction pixel circuit, the mapping relationship between the position of each correction pixel circuit and the corresponding total adjustment amount is recorded, which yields the compensation voltage lookup table for the display panel. Subsequently, when it is necessary to adjust the data voltage of the pixel circuits of the display panel, the total adjustment amount of the data voltage corresponding to each pixel circuit can be determined directly by looking up the compensation voltage lookup table.

[0205] It should be noted that the total adjustment amount mentioned in this embodiment is based on the adjustment of the data voltage connected to each target color pixel circuit in the target pixel column by the method of the above embodiment, so that the preset voltage of the multiple pixel circuits of the target color is the same, and the adjustment is made on the basis of the data voltage corresponding to each pixel circuit.

[0206] For example, if the voltage of the first node is 0.89V and the voltage of the second node is 0.91V, then the maximum voltage difference is 0.91-0.89=0.02V. If all the pixel circuits in this pixel column are the same color and there are eleven of them, then the voltage step size is 0.02 / 10=0.002V. Assuming that the data voltage corresponding to the pixel circuit numbered 1 is set to 1.49V, then the data voltage corresponding to the pixel circuit numbered 2 is 1.492V, then the data voltage corresponding to the pixel circuit numbered 3 is 1.494V, and so on, until the data voltage corresponding to the pixel circuit numbered 11 is 1.51V. The total adjustment value corresponding to pixel circuit number 1 is determined to be 0.025V. Therefore, during compensation adjustment, the voltage is adjusted by 0.025V based on the data voltage of 1.49V set for pixel circuit number 1. Similarly, the total adjustment value corresponding to pixel circuit number 11 is 0.027V. Therefore, during compensation adjustment, the voltage is adjusted by 0.027V based on the data voltage of 1.51V set for pixel circuit number 11. First, it is necessary to ensure that the preset voltages of multiple pixel circuits for the target color are the same. Then, adjustments are made based on the data voltages connected to each pixel circuit to ensure that the detection data of each pixel circuit is within the standard detection data range.

[0207] In this embodiment, by determining the total adjustment amount corresponding to each correction pixel circuit and then recording the mapping relationship between the position of each correction pixel circuit and the corresponding total adjustment amount, a compensation voltage lookup table for the display panel can be obtained. Subsequently, when it is necessary to adjust the data voltage of the pixel circuits of the display panel, the total adjustment amount of the data voltage corresponding to each pixel circuit can be determined directly by looking up the compensation voltage lookup table. This ensures that after the pixel circuits are compensated with the corresponding total adjustment amount, the detection data of all pixel circuits will reach the standard detection data range, thereby improving the uniformity of the display panel.

[0208] In one embodiment, such as Figure 16 As shown, the detection method for the display panel also includes steps S1600-S1620.

[0209] Step S1600: Obtain the detection data of each pixel circuit of the display panel.

[0210] Among them, it is possible to directly detect each pixel circuit of the display panel and obtain the detection data of each pixel circuit.

[0211] In step S1610, the value with the highest probability of occurrence in the detection data of each pixel circuit of the display panel or the average value of the detection data of each pixel circuit in the preset area in the center of the display panel is used as the standard detection data.

[0212] Step S1620: Obtain the standard detection data range based on the standard detection data.

[0213] The standard detection data range is defined as a certain positive and negative range based on the standard detection data.

[0214] The detection data includes the detection voltage output by the detection module, which is related to the drive current of the current detection pixel circuit under a preset voltage.

[0215] In this embodiment, the value with the highest probability of occurrence in the detection data of each pixel circuit of the display panel or the average value of the detection data of each pixel circuit in the preset area in the center of the display panel is used as the standard detection data. Thus, the detection data that best represents the display status of the display panel is used as the standard detection data, providing a reference for subsequent adjustments.

[0216] In one embodiment, such as Figure 17 As shown, the detection method for the display panel also includes steps S1700-S1720.

[0217] Step S1700: Obtain the detection data of the pixel circuit at the center position of the display panel.

[0218] Step S1710 uses the detection data of the pixel circuit at the center of the display panel as the standard detection data.

[0219] Step S1720: Obtain the standard detection range based on the standard detection data.

[0220] In this embodiment, the detection data of the pixel circuit at the center of the display panel is used as the standard detection data. Thus, the detection data that best represents the display status of the display panel is used as the standard detection data, providing a reference for subsequent adjustments. The center of the display panel is the central area used by gamma adjustment.

[0221] It should be understood that, although Figure 1 , 3 The steps in flowcharts -5, 8, 10, 13-17 are shown sequentially as indicated by the arrows; however, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order requirement for the execution of these steps, and they can be performed in other orders. Furthermore, Figure 1 , 3 At least some of the steps in -5, 8, 10, 13-17 may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but may be executed at different times. The execution order of these steps or stages is not necessarily sequential, but may be executed in turn or alternately with other steps or at least some of the steps or stages in other steps.

[0222] In one embodiment, such as Figure 18 As shown, a display panel is provided, including: multiple pixel columns, each pixel column including multiple pixel circuits, a detection module, and a processing module. Multiple pixel circuits in the same column are connected to the detection module via the same detection signal line. The processing module is connected to each pixel circuit and the detection module respectively (the connections between the processing module and each pixel circuit are not shown), wherein:

[0223] The processing module is configured to: acquire the first node voltage and the second node voltage in the target pixel column, wherein the first node voltage is the voltage of the node in the target pixel column where the pixel circuit at the farthest end relative to the detection module is connected to the detection signal line, and the second node voltage is the voltage of the node in the target pixel column where the pixel circuit at the closest end relative to the detection module is connected to the detection signal line; adjust the data voltage connected to each target color pixel circuit in the target pixel column according to the first node voltage and the second node voltage, so that the preset voltage of the multiple pixel circuits of the target color is the same, wherein the preset voltage is the difference between the data voltage connected to the target color pixel circuit and the voltage of the node connected to the target color pixel circuit and the detection signal line; and detect the multiple target color pixel circuits in the target pixel column to obtain the detection data of each target color pixel circuit.

[0224] In this embodiment, the display panel includes multiple pixel columns, each pixel column including multiple pixel circuits. Multiple pixel circuits in the same column are connected to the detection module via the same detection signal line. The processing module is connected to each pixel circuit and the detection module. The processing module first acquires the first node voltage and the second node voltage of the target color pixel circuit in the target pixel column. The first node voltage is the voltage of the node in the target pixel column that connects the target color pixel circuit farthest from the detection module to the detection signal line. The second node voltage is the voltage of the node in the target pixel column that connects the target color pixel circuit closest to the detection module to the detection signal line. This yields the first node voltage corresponding to the target color pixel circuit farthest from the detection module in the target pixel column to be detected, and the second node voltage corresponding to the target color pixel circuit closest to the detection module in the target pixel column to be detected. Because the detection signal line has line impedance, there is a voltage drop between the first node voltage and the second node voltage due to the line impedance. This voltage drop can lead to inaccurate detection results. Therefore, based on the first node voltage and the second node voltage, the data voltage connected to each target color pixel circuit in the target pixel column is adjusted to make the preset voltage of multiple pixel circuits of the target color the same. The preset voltage is the difference between the data voltage connected to the target color pixel circuit and the voltage of the node connecting the target color pixel circuit and the detection signal line. By adjusting the data voltage connected to each target color pixel circuit in the target pixel column, the preset voltage is made the same, which solves the problem of different preset voltages of each target color pixel circuit caused by the voltage drop due to line impedance. Furthermore, by making the preset voltages of each target color pixel circuit the same, it is ensured that each target color pixel circuit is in the same driving state. Then, the multiple target color pixel circuits in the target pixel column are detected to obtain the detection data of each target color pixel circuit. Since the detection data obtained at this time is obtained under the condition that each target color pixel circuit is in the same driving state, the detection data of each target color pixel circuit is not affected by the voltage drop caused by the line impedance of the detection signal line. It can accurately characterize the difference in the characteristics of the driving current between each target color pixel circuit. This difference is only affected by the characteristics of the driving current of the target color pixel circuit itself, and is not affected by the voltage drop caused by the line impedance of the detection signal line. Therefore, the detection result is more accurate.

[0225] In one embodiment, such as Figure 19As shown, the display panel includes at least one gating module 40, and the gating module 40 includes at least one gating switch SW. Each gating switch SW is disposed between the detection signal line 100 connected to a column of pixel circuits 20 and the detection module 30. The gating module 40 can sequentially turn on its multiple gating switches SW, thereby achieving the effect of sequentially connecting each detection signal line 100 to the detection module 30, which facilitates the detection module 30 to detect each pixel circuit. The specific detection process has been described in the above embodiment and will not be repeated here.

[0226] In this embodiment, the display panel includes at least one gating module 40, which enables sequential detection of multiple columns of pixels.

[0227] In one embodiment, such as Figure 20 As shown, a schematic diagram of the connection between the pixel circuit and the detection module 30 is provided to explain the detection principle.

[0228] The pixel circuit includes a driving transistor T1, a second transistor T2, a third transistor T3, a light-emitting element D1, and a storage capacitor Cst. The first terminal of the driving transistor T1 is electrically connected to the first power supply line VDD. The second terminal of the driving transistor T1 is electrically connected to the first terminal of the light-emitting element D1 and the first terminal of the third transistor T3, respectively. The second terminal of the light-emitting element D1 is electrically connected to the second power supply line VSS. The second terminal of the third transistor T3 is connected to the detection signal line 100. The second transistor T2 is used to transmit the data voltage Vdata on the data signal line 200 to the gate of the driving transistor T1. After the third transistor T3 is turned on, it transmits the voltage at the second terminal of the driving transistor T1 to the detection module 30 outside the pixel circuit through the detection signal line 100. The detection signal line also includes a switch SW1, through which the detection signal line is connected to the reference signal Vref.

[0229] The detection module 30 includes a charging capacitor C1, an integrator Q1, a second switch SW2, and a sampling switch SMP. The first input terminal of the integrator Q1 is connected to a reference voltage Vref, and the second input terminal of the integrator Q1 is connected to the detection signal line 100. The first terminal of the charging capacitor C1 is connected to the second input terminal of the integrator Q1, and the second terminal of the charging capacitor C1 is connected to the output terminal OUT of the integrator Q1. The first terminal of the second switch SW2 is connected to the second input terminal of the integrator Q1, and the second terminal of the second switch SW2 is connected to the output terminal OUT of the integrator. The sampling switch SMP is connected to the output terminal OUT of the integrator Q1.

[0230] Figure 21 This is a driving timing diagram for the circuit described above.

[0231] During the initialization phase H1, the signal on the first scan line S1 is high, controlling transistor T2 to turn on. The turned-on transistor T2 transmits the data voltage Vdata from the data signal line 100 to the gate of the driving transistor T1. The signal connected to the control terminal of the first switch SW1 and the signal on the second scan line S2 are both high, controlling the third transistor T3 and the first switch SW1 to turn on. The turned-on first switch SW1 and third transistor T3 transmit the reference voltage Vref to the first terminal of the driving transistor T1. The driving transistor T1 generates a driving current based on the data voltage Vdata.

[0232] When the signal input to the control terminal of the second switch SW2 is high, the second switch SW2 is turned on. The turned-on second switch SW2 resets the output terminal OUT of the integrator Q1, restoring the voltage at the output terminal OUT of the integrator Q1 to the reference voltage Vref. The reference voltage Vref is less than the lighting voltage of the light-emitting element D1, thereby preventing the light-emitting element D1 from being accidentally lit.

[0233] During the charging phase H2, the signal on the first scan line S1 is high, controlling transistor T2 to conduct, so as to continue writing the data voltage Vdata into the gate of the driving transistor T1. The signals connected to the control terminals of the first switch SW1 and the second control switch SW2 both become low, controlling the first switch SW1 and the second switch SW2 to disconnect. Due to the "virtual short" characteristic of integrator Q1, the potential of the first input terminal of integrator Q1 and the potential of the second input terminal of integrator Q1 are equal. Therefore, the potential of the second input terminal of integrator Q1 is equal to the reference voltage Vref. The second input terminal of integrator Q1 is connected to the second terminal of the third transistor T3 through the detection signal line 100. The reference voltage Vref is transferred to the potential of the first terminal of the driving transistor T1 through integrator Q1, detection signal line 100 and third transistor T3, so that the magnitude of the driving current generated by the driving transistor T1 remains unchanged during the charging phase H2. The first power supply ELVDD charges the charging capacitor C1, and the voltage of the output terminal OUT of integrator Q1 changes linearly with time.

[0234] During the sampling phase H3, the signal connected to the control terminal of the sampling switch SMP goes low, causing the sampling switch SMP to disconnect. Voltage sampling is performed on the falling edge of the sampling switch SMP, and this falling edge can be considered the sampling end time, thus determining the sampling time of the detected data. The voltage at the output terminal OUT of the integrator Q1 sampled at the falling edge of the sampling switch SMP is the detected data. The signal connected to the control terminal of the sampling switch SMP can remain high throughout the initialization phase H1 and the charging phase H2, or it can only go high at the end of the charging phase H2 to maintain the sensitivity of the sampling switch SMP.

[0235] During the charging process of capacitor C1 using the driving current, the charge on capacitor C1 is Q1 = C * V1, and the charge on capacitor C1 also satisfies Q1 = I1 * t1. Based on these two formulas, the correspondence between the driving current and the detected data can be calculated, that is:

[0236]

[0237] Where I1 is the driving current of the current detection pixel circuit, C is the capacitance value of the charging capacitor C1, V1 is the detection data OUT, Vref is the reference voltage, and t1 is the duration of the charging phase H2. The duration of the charging phase H2 is the sampling time.

[0238] The driving current I of the pixel circuit needs to be consistent to ensure the uniformity of light emission of the display panel. As can be seen from the above formula, the driving current is negatively correlated with the detection data. By checking whether the detection data of the detection module meets the standard detection data range, the data voltage of each pixel circuit is determined. This eliminates the need for internal compensation of the pixel circuit, saves the pixel circuit area, and ensures the display effect.

[0239] In this embodiment, a specific circuit diagram of a pixel circuit and a detection module is provided, which can realize the function of detecting the pixel circuit.

[0240] In one embodiment, such as Figure 22 As shown, a detection device for a display panel is provided, comprising: a data acquisition module 2201, a voltage adjustment module 2202, and a data detection module 2203, wherein:

[0241] The data acquisition module 2201 is used to acquire the first node voltage and the second node voltage in the target pixel column, wherein the first node voltage is the voltage of the node in the target pixel column that is connected to the detection signal line relative to the farthest end of the detection module, and the second node voltage is the voltage of the node in the target pixel column that is connected to the detection signal line relative to the nearest end of the detection module.

[0242] The voltage adjustment module 2202 is used to adjust the data voltage connected to each target color pixel circuit in the target pixel column according to the first node voltage and the second node voltage, so that the preset voltage of multiple target color pixel circuits is the same, wherein the preset voltage is the difference between the data voltage connected to the target color pixel circuit and the voltage of the node connecting the target color pixel circuit and the detection signal line.

[0243] The data detection module 2203 is used to detect multiple target color pixel circuits in the target pixel column and obtain detection data of each target color pixel circuit.

[0244] In one embodiment, the voltage regulation module 2202 includes: a differential voltage determination unit, a step size determination unit, a reference voltage acquisition unit, and an adjustment unit, wherein:

[0245] The differential pressure determination unit is used to determine the maximum differential pressure based on the voltage of the first node and the voltage of the second node.

[0246] The step size determination unit is used to determine the voltage step size based on the maximum voltage difference and the number of target color pixel circuits in the target pixel column.

[0247] The reference voltage acquisition unit is used to acquire the reference data voltage corresponding to the reference pixel circuit of the target color in the target pixel column.

[0248] An adjustment unit is used to adjust at least one voltage step based on a reference data voltage, according to the position of the current detection pixel circuit relative to the reference pixel circuit in the target pixel column, as the data voltage of the current detection pixel circuit.

[0249] In one embodiment, the voltage regulation module 2202 includes: a position determination unit, a step size adjustment unit, a first adjustment unit, and a second adjustment unit, wherein:

[0250] The position determination unit is used to determine that the currently detected pixel circuit is the i-th target color pixel circuit relative to the reference pixel circuit.

[0251] The step size adjustment unit is used to adjust the voltage by i steps based on the reference data voltage for the current detection pixel circuit to determine the data voltage connected to the current detection pixel circuit, where 1≤i≤n-1, and n is the number of target color pixel circuits in the target pixel column.

[0252] The first adjustment unit is used when the currently detected pixel circuit is the i-th target color pixel circuit closer to the detection module relative to the reference pixel circuit. It reduces the reference data voltage by i voltage steps to obtain the current data voltage for the current detected pixel circuit.

[0253] The second adjustment unit is used when the currently detected pixel circuit is the i-th target color pixel circuit positioned away from the detection module relative to the reference pixel circuit. It increases the reference data voltage by i voltage steps to obtain the data voltage for the current detected pixel circuit.

[0254] In one embodiment, the detection device for the display panel further includes: a first detection module, a second detection module, and a coefficient determination module, wherein:

[0255] The first detection module is used to detect multiple test circuits under a first preset condition and obtain multiple first test data. The first preset condition includes controlling the current output by the multiple test circuits to be greater than a preset value.

[0256] The second detection module is used to detect multiple test circuits under a second preset condition and obtain multiple second test data. The second preset condition includes controlling the current output by the multiple test circuits to be less than or equal to a preset value.

[0257] The coefficient determination module is used to determine the preset conversion coefficients based on multiple first test data and multiple second test data.

[0258] In one embodiment, the data detection module 2203 includes: a first reset unit, a second reset unit, a detection unit, and a loop detection unit, wherein:

[0259] The first reset unit is used to reset all target color pixel circuits in the target pixel column before detecting multiple target color pixel circuits in the target pixel column.

[0260] The second reset unit is used to reset the multiple target color pixel circuits of the target pixel column after obtaining the detection data of the multiple target color pixel circuits of the target pixel column.

[0261] The detection unit is used to turn on the selection switch corresponding to the target pixel column, and sequentially detect each pixel circuit on the target pixel column to obtain the detection data of each pixel circuit.

[0262] The loop detection unit is used to, after detecting all pixel circuits on the target pixel column, take the column containing the undetected pixel circuits on the display panel as the new target pixel column, and switch the corresponding selection switch of the target pixel column to detect each pixel circuit on the target pixel column in sequence, and obtain the detection data of each pixel circuit, until all the pixel circuits on the display panel have been detected.

[0263] In one embodiment, the detection device for the display panel further includes: a judgment module and an adjustment module, wherein:

[0264] The judgment module is used to determine whether the detection data of the current detection pixel circuit under the current access data voltage exceeds the standard detection data range.

[0265] The adjustment module is used to adjust the data voltage connected to the current detection pixel circuit at least once if the detection data of the current detection pixel circuit exceeds the standard detection data range, until the detection data of the current detection pixel circuit reaches the standard detection data range.

[0266] In one embodiment, the adjustment module includes: a first adjustment determining unit, a first updating unit, a second adjustment determining unit, and a second updating unit, wherein:

[0267] The first adjustment determining unit is used to determine a first adjustment amount based on the difference between the current detection data of the detection pixel circuit and the upper limit of the standard detection data range if the detection data of the current detection pixel circuit is greater than the upper limit of the standard detection data range.

[0268] The first update unit is used to reduce the first adjustment amount based on the current detection pixel circuit data voltage, and use it as the update data voltage of the current detection pixel circuit.

[0269] The second adjustment determining unit is used to determine a second adjustment amount based on the difference between the current detection data of the detection pixel circuit and the lower limit of the standard detection data range if the detection data of the current detection pixel circuit is less than the lower limit of the standard detection data range.

[0270] The second update unit is used to increase the second adjustment amount based on the current data voltage of the detection pixel circuit, as the update data voltage of the current detection pixel circuit.

[0271] In one embodiment, the detection device for the display panel further includes: a total adjustment amount determination module and a lookup table determination module, wherein:

[0272] The total adjustment amount determination module is used to determine the total adjustment amount of the correction pixel circuit based on at least one first adjustment amount and / or at least one second adjustment amount of the correction pixel circuit, wherein the correction pixel circuit is a pixel circuit whose detected data reaches the standard detected data range after adjusting the data voltage.

[0273] The lookup table determination module is used to record the position of each correction pixel circuit and the total adjustment amount corresponding to each correction pixel circuit as a compensation voltage lookup table.

[0274] Specific limitations regarding the detection device for the display panel can be found in the above-described limitations of the detection method for the display panel, and will not be repeated here. Each module in the aforementioned detection device for the display panel can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in or independent of the processor in a computer device in hardware form, or stored in the memory of a computer device in software form, so that the processor can call and execute the operations corresponding to each module. It should be noted that the module division in this embodiment is illustrative and only represents a logical functional division; in actual implementation, other division methods may be used.

[0275] In one embodiment, a computer device is provided, the internal structure of which can be shown as follows: Figure 23As shown, the computer device includes a processor, memory, and a network interface connected via a system bus. The processor provides computing and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system, computer programs, and a database. The internal memory provides an environment for the operation of the operating system and computer programs stored in the non-volatile storage media. The network interface is used for communication with external terminals via a network connection. When the computer program is executed by the processor, it implements a method for detecting a display panel.

[0276] Those skilled in the art will understand that Figure 23 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0277] In one embodiment, a computer device is provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps in the above-described method embodiments.

[0278] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon, which, when executed by a processor, implements the steps in the above method embodiments.

[0279] In one embodiment, a computer program product is provided, including a computer program that, when executed by a processor, implements the steps in the above method embodiments.

[0280] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the methods described above. Any references to memory, storage, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, or optical storage, etc. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc.

[0281] In the description of this specification, references to terms such as "some embodiments," "other embodiments," and "ideal embodiments" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative descriptions of the above terms do not necessarily refer to the same embodiments or examples.

[0282] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0283] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A method for detecting a display panel, characterized in that, The display panel includes multiple pixel columns, each pixel column including multiple pixel circuits. Multiple pixel circuits in the same column are connected to a detection module via the same detection signal line. The method includes: The voltage of the first node and the voltage of the second node in the target pixel column are obtained, wherein the voltage of the first node is the voltage of the node connecting the target color pixel circuit and the detection signal line at the farthest end of the detection module in the target pixel column, and the voltage of the second node is the voltage of the node connecting the target color pixel circuit and the detection signal line at the nearest end of the detection module in the target pixel column. Based on the first node voltage and the second node voltage, adjust the data voltage connected to each target color pixel circuit in the target pixel column so that the preset voltage of multiple target color pixel circuits is the same. The maximum voltage difference is determined based on the first node voltage and the second node voltage, and the voltage step size is determined based on the maximum voltage difference and the number of target color pixel circuits in the target pixel column. Obtain the reference data voltage corresponding to the reference pixel circuit of the target color in the target pixel column, and adjust at least one voltage step based on the reference data voltage according to the position of the current detection pixel circuit in the target pixel column relative to the reference pixel circuit, as the data voltage of the current detection pixel circuit; wherein, the preset voltage is the difference between the data voltage accessed by the target color pixel circuit and the voltage of the connection node between the target color pixel circuit and the detection signal line. Multiple target color pixel circuits of the target pixel column are detected to obtain detection data for each target color pixel circuit; Multiple test circuits are detected under a first preset condition to obtain multiple first test data, wherein the first preset condition includes controlling the current output by the multiple test circuits to be greater than a preset value. The multiple test circuits are detected under a second preset condition to obtain multiple second test data, wherein the second preset condition includes controlling the current output by the multiple test circuits to be less than or equal to the preset value; Based on the functional relationship between the plurality of first test data and the plurality of second test data, a preset conversion coefficient is determined; Updated detection data for each target color pixel circuit is obtained based on the detection data of each target color pixel circuit and the preset conversion coefficient.

2. The detection method for a display panel according to claim 1, characterized in that, The step of adjusting at least one voltage step size based on the reference data voltage according to the position of the current detection pixel circuit in the target pixel column relative to the reference pixel circuit, as the data voltage of the current detection pixel circuit, includes: The currently detected pixel circuit is determined to be the i-th target color pixel circuit relative to the reference pixel circuit; Based on the reference data voltage, the voltage is adjusted by i steps for the current detection pixel circuit to determine the data voltage accessed by the current detection pixel circuit, where 1≤i≤n-1, and n is the number of target color pixel circuits in the target pixel column.

3. The detection method for a display panel according to claim 2, characterized in that, When the currently detected pixel circuit is the i-th target color pixel circuit that is closer to the detection module than the reference pixel circuit; The voltage voltage is reduced by i steps from the reference data voltage to obtain the current data voltage of the detection pixel circuit. When the current detection pixel circuit is the i-th target color pixel circuit set on the side away from the detection module relative to the reference pixel circuit; The reference data voltage is increased by i voltage steps to obtain the current data voltage for the detection pixel circuit.

4. The method for detecting a display panel according to claim 1, characterized in that, The pixel circuit includes a driving transistor. The connection node between the pixel circuit and the detection signal line is the connection node between the target electrode of the driving transistor and the detection signal line. The gate of the driving transistor is used to connect the data voltage. The target electrode is the source or drain of the driving transistor.

5. The detection method for a display panel according to claim 1, characterized in that, The method further includes: resetting all target color pixel circuits in the target pixel column before detecting multiple target color pixel circuits in the target pixel column; After obtaining the detection data of each target color pixel circuit in the target pixel column, each target color pixel circuit in the target pixel column is reset.

6. The method for detecting a display panel according to claim 5, characterized in that, The display panel includes at least one gating module, and the gating module includes at least one gating switch. Each gating switch is disposed between a detection signal line connected to a column of pixel circuits and the detection module.

7. The method for detecting a display panel according to claim 1, characterized in that, The detection of multiple target color pixel circuits in the target pixel column to obtain detection data for each target color pixel circuit includes: Turn on the selection switch corresponding to the target pixel column, and detect each target color pixel circuit on the target pixel column in sequence to obtain the detection data of each target color pixel circuit; After all target color pixel circuits on the target pixel column have been detected, the column containing the undetected pixel circuits on the display panel is taken as the new target pixel column. The corresponding selection switch of the target pixel column is turned on, and the detection data of each target color pixel circuit on the target pixel column is obtained in turn. This process continues until all the pixel circuits on the display panel have been detected.

8. The method for detecting a display panel according to claim 7, characterized in that, The detection data includes the detection voltage output by the detection module, which is related to the driving current of the current detection pixel circuit under the preset voltage.

9. A method for debugging a display panel, characterized in that... ， The detection method according to any one of claims 1-8 obtains the detection data voltage of the current detection pixel circuit in the target pixel column; Determine whether the detection data of the current detection pixel circuit under the detection data voltage exceeds the standard detection data range; If the data exceeds the standard detection data range, the data voltage connected to the current detection pixel circuit is adjusted at least once until the detection data of the current detection pixel circuit reaches the standard detection data range. The position and total adjustment amount of the current detection pixel circuit are recorded. If the standard detection data range is not exceeded, the position and adjustment amount of the current detection pixel circuit are recorded as 0.

10. The debugging method for the display panel according to claim 9, characterized in that, If the data exceeds the standard detection data range, the data voltage connected to the currently detected pixel circuit shall be adjusted at least once, including: If the detection data of the current detection pixel circuit is greater than the upper limit of the standard detection data range, then a first adjustment amount is determined based on the difference between the detection data of the current detection pixel circuit and the upper limit of the standard detection data range. Based on the data voltage of the current detection pixel circuit, the first adjustment amount is reduced as the updated data voltage of the current detection pixel circuit; If the detection data of the current detection pixel circuit is less than the lower limit of the standard detection data range, then a second adjustment amount is determined based on the difference between the detection data of the current detection pixel circuit and the lower limit of the standard detection data range. Based on the data voltage of the current detection pixel circuit, the second adjustment amount is increased as the updated data voltage of the current detection pixel circuit.

11. The debugging method for the display panel according to claim 10, characterized in that, The method further includes: The total adjustment amount of the correction pixel circuit is determined based on at least one first adjustment amount and / or at least one second adjustment amount of the correction pixel circuit, wherein the correction pixel circuit is the pixel circuit whose detection data after adjusting the data voltage reaches the standard detection data range of the current detection pixel circuit. The position of each correction pixel circuit and the total adjustment amount corresponding to each correction pixel circuit are recorded as a compensation voltage lookup table.

12. The debugging method for the display panel according to any one of claims 9-11, characterized in that, The method further includes: Acquire detection data of each pixel circuit of the display panel; The value with the highest probability of occurrence in the detection data of each pixel circuit of the display panel or the average value of the detection data of each pixel circuit in the preset area in the center of the display panel is used as the standard detection data. The standard detection data range is obtained based on the standard detection data.

13. The debugging method for the display panel according to claim 12, characterized in that, The detection data includes the detection voltage output by the detection module, which is related to the driving current of the current detection pixel circuit under the preset voltage.

14. A display panel, characterized in that, include: Multiple pixel columns, each pixel column including multiple pixel circuits, a detection module, and a processing module, wherein multiple pixel circuits in the same column are connected to the detection module via the same detection signal line, and the processing module is connected to each pixel circuit and the detection module respectively, wherein: The processing module is configured as follows: The first node voltage and the second node voltage in the target pixel column are obtained, wherein the first node voltage is the voltage of the node in the target pixel column that connects the target color pixel circuit and the detection signal line relative to the farthest end of the detection module, and the second node voltage is the voltage of the node in the target pixel column that connects the target color pixel circuit and the detection signal line relative to the nearest end of the detection module. Based on the first node voltage and the second node voltage, adjust the data voltage connected to each target color pixel circuit in the target pixel column so that the preset voltage of multiple target color pixel circuits is the same. The maximum voltage difference is determined based on the first node voltage and the second node voltage, and the voltage step size is determined based on the maximum voltage difference and the number of target color pixel circuits in the target pixel column. Obtain the reference data voltage corresponding to the reference pixel circuit of the target color in the target pixel column, and adjust at least one voltage step based on the reference data voltage according to the position of the current detection pixel circuit in the target pixel column relative to the reference pixel circuit, as the data voltage of the current detection pixel circuit; wherein, the preset voltage is the difference between the data voltage accessed by the target color pixel circuit and the voltage of the connection node between the target color pixel circuit and the detection signal line. Multiple target color pixel circuits of the target pixel column are detected to obtain detection data for each target color pixel circuit; Multiple test circuits are detected under a first preset condition to obtain multiple first test data, wherein the first preset condition includes controlling the current output by the multiple test circuits to be greater than a preset value. The multiple test circuits are detected under a second preset condition to obtain multiple second test data, wherein the second preset condition includes controlling the current output by the multiple test circuits to be less than or equal to the preset value; Based on the functional relationship between the plurality of first test data and the plurality of second test data, a preset conversion coefficient is determined; Updated detection data for each target color pixel circuit is obtained based on the detection data of each target color pixel circuit and the preset conversion coefficient.

15. A detection device for a display panel, characterized in that, The display panel includes multiple pixel columns, each pixel column including multiple pixel circuits. Multiple pixel circuits in the same column are connected to a detection module via the same detection signal line. The device includes: The data acquisition module is used to acquire the first node voltage and the second node voltage in the target pixel column, wherein the first node voltage is the voltage of the node connecting the target color pixel circuit and the detection signal line at the farthest end of the target color pixel circuit relative to the detection module in the target pixel column, and the second node voltage is the voltage of the node connecting the target color pixel circuit and the detection signal line at the nearest end of the target color pixel circuit relative to the detection module in the target pixel column; A voltage adjustment module is used to adjust the data voltage connected to each target color pixel circuit in the target pixel column according to the first node voltage and the second node voltage, so that the preset voltage of multiple target color pixel circuits is the same, wherein the preset voltage is the difference between the data voltage connected to the target color pixel circuit and the voltage of the target color pixel circuit and the connection node of the detection signal line; The data detection module is used to detect multiple target color pixel circuits in the target pixel column and obtain detection data for each target color pixel circuit. The voltage regulation module includes: A differential pressure determination unit is used to determine the maximum differential pressure based on the first node voltage and the second node voltage. The step size determination unit is used to determine the voltage step size based on the maximum voltage difference and the number of target color pixel circuits in the target pixel column; A reference voltage acquisition unit is used to acquire the reference data voltage corresponding to the reference pixel circuit of the target color in the target pixel column; An adjustment unit is used to adjust at least one voltage step based on the reference data voltage, according to the position of the current detection pixel circuit in the target pixel column relative to the reference pixel circuit, as the data voltage of the current detection pixel circuit; The first detection module is used to detect multiple test circuits under a first preset condition and obtain multiple first test data, wherein the first preset condition includes controlling the current output by the multiple test circuits to be greater than a preset value. The second detection module is used to detect the plurality of test circuits respectively under a second preset condition to obtain a plurality of second test data, wherein the second preset condition includes controlling the current output by the plurality of test circuits to be less than or equal to the preset value; The coefficient determination module is used to determine a preset conversion coefficient based on the functional relationship between the plurality of first test data and the plurality of second test data, and to obtain updated detection data of each target color pixel circuit based on the detection data of each target color pixel circuit and the preset conversion coefficient.

16. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the method according to any one of claims 1 to 13.

17. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 13.

18. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 13.

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