Pixel compensation method, pixel driving circuit and display device

Abstract

The present application relates to a pixel compensation method, a pixel driving circuit and a display device, wherein the pixel compensation method includes: obtaining a picture to be displayed, and calculating a predicted current passing through the pixel of the display panel when displaying the picture to be displayed based on the picture to be displayed; comparing the predicted current with a threshold current to determine whether the pixel is in a low current state when displaying the picture to be displayed; if it is determined that the pixel is in the low current state when displaying the picture to be displayed, switching the driving voltage of the picture to be displayed to a compensation voltage, and subsequently driving the pixel to display the picture to be displayed by the compensation voltage, so that when the pixel displays the picture to be displayed, the pixel is not in a low current state, the current passing through the pixel is normal, and then the pixel displays the picture to be displayed normally, thereby avoiding the problem of abnormal display of the entire display panel when displaying the picture to be displayed.

Description

Technical Field

[0001] The present application relates to the technical field of display panels, and in particular to a pixel compensation method, a pixel driving circuit, and a display device. Background Art

[0002] Light-emitting diode (LED) displays are lighter, thinner, brighter, lower power consumption, faster response, higher contrast, wider color gamut, and wider viewing angle than liquid crystal displays (LCD), and are therefore favored by consumers. With the rapid development of LED display technology, sub-millimeter light-emitting diodes (Mini-Light-Emitting Diode, MiniLED) are gradually entering consumers' lives.

[0003] Mini LED is a current-controlled device. Currently, in related technologies, when a display panel using Mini LED displays a low-grayscale image, the blue and green pixels appear darker and the red is brighter, causing the entire display panel to appear reddish. Summary of the Invention

[0004] The present application provides a pixel compensation method, a pixel driving circuit, and a display device to solve the problem in the related art that when displaying low grayscale images, some pixels are dark and some pixels are bright, resulting in abnormal display of the entire display panel.

[0005] In a first aspect, the present application provides a pixel compensation method, which includes: obtaining a picture to be displayed, and calculating a predicted current passing through the pixel of the display panel when displaying the picture to be displayed based on the picture to be displayed; comparing the predicted current with a threshold current to determine whether the pixel is in a low current state when displaying the picture to be displayed; if it is determined that the pixel is in the low current state when displaying the picture to be displayed, switching the driving voltage of the picture to be displayed to a compensation voltage.

[0006] In some examples, before comparing the predicted current with the threshold current, the method further includes: obtaining grayscale data of the pixel when the pixel performs a low grayscale display and the display is abnormal; based on the correspondence between the grayscale data and the current, obtaining a current value corresponding to the grayscale data, and using the current value as the threshold current.

[0007] In some examples, the predicted current is compared with a threshold current to determine whether the pixel is in a low current state when displaying the image to be displayed, including: comparing the predicted current with the threshold current; if the predicted current is not higher than the threshold current, determining that the pixel is in a low current state when displaying the image to be displayed.

[0008] In some examples, if it is determined that the pixel is in the low current state when displaying the picture to be displayed, after switching the driving voltage of the picture to be displayed to the compensation voltage, the method also includes: if the current display picture is completed, driving the pixel according to the compensation voltage to perform light-emitting display.

[0009] In some examples, a picture to be displayed is obtained, and a predicted current passing through the pixels of a display panel when displaying the picture to be displayed is calculated based on the picture to be displayed, including: obtaining the picture to be displayed, and determining based on the picture to be displayed whether the pixel is in a low grayscale state when displaying the picture to be displayed; if the pixel is in a low grayscale state when displaying the picture to be displayed, calculating the predicted current based on the picture to be displayed.

[0010] In some examples, if the pixel indicating the image to be displayed is not in a low grayscale state, the driving voltage is set to drive the image to be displayed.

[0011] In a second aspect, the present application provides a pixel driving circuit, which includes: a data reading and analysis module and a voltage selection circuit, wherein the data reading and analysis module is used to obtain a picture to be displayed, and calculate the predicted current passing through the pixel of the display panel when displaying the picture to be displayed based on the picture to be displayed; compare the predicted current with the threshold current to determine whether the pixel is in a low current state when displaying the picture to be displayed; and the voltage selection circuit is used to switch the driving voltage of the picture to be displayed to a compensation voltage when determining that the pixel is in the low current state when displaying the picture to be displayed.

[0012] In some examples, the data reading and analysis module is also used to obtain the grayscale data of the pixel when the pixel performs low grayscale display and the display is abnormal; based on the correspondence between the grayscale data and the current, obtain the current value corresponding to the grayscale data, and use the current value as the threshold current.

[0013] In some examples, the data reading and analysis module is also used to obtain the picture to be displayed, and determine whether the pixel is in a low grayscale state when displaying the picture to be displayed based on the picture to be displayed; if the pixel is in a low grayscale state when displaying the picture to be displayed, calculate the predicted current based on the picture to be displayed.

[0014] In a third aspect, a display device is provided, comprising: a frame and a display panel, wherein the display panel is provided with a plurality of pixels arranged in an array, and the pixels are driven by the pixel compensation method as described in any one of the above items.

[0015] The above technical solution provided by the embodiment of the present application has the following advantages compared with the prior art:

[0016] The pixel compensation method provided in the embodiment of the present application includes: obtaining a picture to be displayed, and calculating a predicted current passing through the pixel of the display panel when displaying the picture to be displayed based on the picture to be displayed; comparing the predicted current with a threshold current to determine whether the pixel is in a low-current state when displaying the picture to be displayed; if it is determined that the pixel is in the low-current state when displaying the picture to be displayed, switching the driving voltage of the picture to be displayed to a compensation voltage, and subsequently driving the pixel to display the picture to be displayed by the compensation voltage, so that when the pixel displays the picture to be displayed, the pixel is not in a low-current state, the current passing through the pixel is normal, and then the pixel displays the picture to be displayed normally, thereby avoiding the problem that when the display panel displays the picture to be displayed, some pixels display darkly and some display brightly, resulting in abnormal display of the entire display panel.

[0017] Additional aspects and advantages of the present application will be given in part in the following description, which will become apparent from the following description, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0020] Figure 1 A schematic diagram of the basic flow of a pixel compensation method provided in Example 1 of the present application;

[0021] Figure 2 A schematic diagram of the basic structure of a pixel driving circuit applying an optional pixel compensation method provided in the second embodiment of the present application;

[0022] Figure 3 A basic timing diagram of an optional voltage signal provided in the second embodiment of the present application;

[0023] Figure 4 A schematic diagram of a basic flow chart of an optional pixel compensation method provided in the second embodiment of the present application;

[0024] Figure 5 A schematic diagram of the basic structure of a pixel driving circuit provided in Example 3 of the present application;

[0025] Figure 6 This is a structural schematic diagram of a display device provided in Example 4 of the present application.

[0026] Description of Reference Numerals

[0027] 1-Data reading and analysis module; 2-Voltage selection circuit; 3-Frame; 4-Display panel; Q-Control switch. DETAILED DESCRIPTION

[0028] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0029] Example 1

[0030] To solve the problem in related technologies that when displaying low grayscale images, some pixels are dark and some pixels are bright, resulting in abnormal display of the entire display panel, please refer to Figure 1 , Figure 1 A pixel compensation method provided in an embodiment of the present application includes:

[0031] S101, obtaining a picture to be displayed, and calculating, based on the picture to be displayed, a predicted current passing through a pixel of a display panel when displaying the picture to be displayed;

[0032] S102, comparing the predicted current with a threshold current to determine whether the pixel is in a low current state when displaying the image to be displayed;

[0033] S103 : If it is determined that the pixel is in the low current state when displaying the image to be displayed, switch the driving voltage of the image to be displayed to a compensation voltage.

[0034] Among them, the picture to be displayed is the next frame display picture of the current frame display picture, that is, the picture to be displayed is the picture to be displayed. It can be understood that based on the picture to be displayed, the driving voltage for driving the pixel to display the picture to be displayed can be obtained. The driving voltage can control the anode voltage transmitted to the pixel anode by the scanning line where the pixel is located, based on the anode voltage transmitted to the pixel anode by the scanning line, and the cathode voltage transmitted to the pixel cathode by the pixel column, as well as the resistance of the pixel, and thus the predicted current passing through the pixel when displaying the picture to be displayed can be obtained.

[0035] It can be understood that calculating the predicted current passing through the pixels of the display panel when displaying the picture to be displayed based on the picture to be displayed includes: calculating the predicted current passing through each pixel in the display panel when displaying the picture to be displayed based on the picture to be displayed; specifically, if there are N pixel rows and M pixel columns on the display panel, the predicted current of N*M pixels when displaying the picture to be displayed corresponding to each pixel can be obtained respectively, thereby achieving the effect of accurately obtaining the predicted current of each pixel in the display panel; in some examples of this embodiment, calculating the predicted current passing through the pixels of the display panel when displaying the picture to be displayed based on the picture to be displayed also includes: calculating the predicted current passing through the target pixel in the display panel when displaying the picture to be displayed based on the picture to be displayed, wherein there is only one target pixel in each pixel row in the display panel, and the target pixel is selected by relevant personnel according to actual needs, thereby avoiding obtaining the predicted current of all pixels in the display panel and saving system resources.

[0036] Among them, if it is determined that the pixel is in the low current state when displaying the picture to be displayed, the driving voltage of the picture to be displayed is switched to the compensation voltage, that is, if the pixel is not in the low current state when displaying the picture to be displayed, then when the pixel displays the picture to be displayed, it is driven by the driving circuit; if it is determined that the pixel is in the low current state when displaying the picture to be displayed, then at this time the driving voltage is switched to the compensation voltage, wherein the compensation voltage is used to compensate the pixel, and the level of the compensation voltage is higher than the level of the high driving voltage.

[0037] In some examples of this embodiment, before comparing the predicted current with the threshold current, the method further includes: when the pixel is displaying a low grayscale and the display is abnormal, obtaining grayscale data of the pixel; based on the corresponding relationship between the grayscale data and the current, obtaining a current value corresponding to the grayscale data, and using the current value as the threshold current. Specifically, the pixel is tested using different test images so that the pixel displays a low grayscale; when the pixel displays abnormally, the grayscale data of the pixel at that time is obtained; based on the grayscale data, the anode voltage and cathode voltage corresponding to the pixel are obtained to determine the corresponding relationship between the grayscale data and the current, thereby obtaining the current value corresponding to the grayscale data, and using the current value as the threshold current.

[0038] It is understandable that the above abnormal display data includes but is not limited to a low-gray and reddish screen on the display panel.

[0039] In some examples of this embodiment, the predicted current is compared with a threshold current to determine whether the pixel is in a low current state when displaying the image to be displayed, including: comparing the predicted current with the threshold current; if the predicted current is not higher than the threshold current, determining that the pixel is in a low current state when displaying the image to be displayed. It is understood that when the predicted current is compared with the threshold current, if the predicted current is not higher than the threshold current, it indicates that the pixel will have a display abnormality when displaying the image to be displayed, for example, a low gray and reddish image abnormality appears on the display panel; it is understood that when the predicted current is lower than or equal to the threshold current, it means that the predicted current is not higher than the threshold current.

[0040] Continuing with the above example, specifically, if the predicted current is X and the threshold current is Y, when X≤Y, it is determined that the predicted current is not higher than the threshold current, and it is determined that the pixel is in a low current state when displaying the image to be displayed; if X is greater than Y, it is determined that the pixel is not in a low current state when displaying the image to be displayed.

[0041] It is understandable that if the predicted current is higher than the threshold current, then it indicates that the pixel will not have display abnormality when displaying the image to be displayed. In this case, the voltage of the image to be displayed can be maintained at the driving voltage.

[0042] In some examples of this embodiment, if it is determined that the pixel is in the low current state when displaying the image to be displayed, after switching the driving voltage of the image to be displayed to the compensation voltage, the method further includes: if the display of the current display image is complete, driving the pixel to emit light and display according to the compensation voltage. The completion of the current display image also means that the display of the current frame is complete, and the next frame of the image to be displayed is entered, and the pixel is driven to emit light and display according to the compensation voltage to display the image to be displayed.

[0043] Continuing with the above example, the pixel driving circuit is provided with a voltage selection circuit. The voltage selection circuit selects the corresponding voltage for the picture to be displayed based on the above comparison result. When the predicted current is X and the threshold current is Y, when X≤Y, it is determined that the predicted current is not higher than the threshold current, and it is determined that the pixel is in a low current state when displaying the picture to be displayed. At this time, if the current display picture is completed, the voltage selection circuit selects the compensation voltage to drive the pixel to display light, thereby realizing compensation for the pixel, avoiding the phenomenon that some pixels are displayed darkly in the low current state, resulting in abnormal display of the entire display panel, and improving the display effect.

[0044] In some examples of this embodiment, a picture to be displayed is obtained, and a predicted current passing through the pixel of the display panel when displaying the picture to be displayed is calculated based on the picture to be displayed, including: obtaining the picture to be displayed, determining whether the pixel is in a low grayscale state when displaying the picture to be displayed based on the picture to be displayed; if the pixel is in a low grayscale state when displaying the picture to be displayed, calculating the predicted current based on the picture to be displayed. If the pixel is not in a low grayscale state when displaying the picture to be displayed, setting the driving voltage to drive the picture to be displayed. It can be understood that the predicted current calculation is performed only when the pixel is in a low grayscale state when displaying the picture to be displayed, and the predicted current calculation is not performed when the pixel is not in a low grayscale state when displaying the picture to be displayed, thereby avoiding the problem of calculating the predicted current for each frame of the picture to be displayed, thereby saving system resources.

[0045] The pixel compensation method provided in this embodiment includes: obtaining a picture to be displayed, and calculating a predicted current passing through the pixel of the display panel when displaying the picture to be displayed based on the picture to be displayed; comparing the predicted current with a threshold current to determine whether the pixel is in a low-current state when displaying the picture to be displayed; if it is determined that the pixel is in the low-current state when displaying the picture to be displayed, switching the driving voltage of the picture to be displayed to a compensation voltage, and subsequently driving the pixel to display the picture to be displayed by the compensation voltage, so that when the pixel displays the picture to be displayed, the pixel is not in a low-current state, the current passing through the pixel is normal, and then the pixel displays the picture to be displayed normally, thereby avoiding the problem that when the display panel displays the picture to be displayed, some pixels display darkly and some display brightly, resulting in abnormal display of the entire display panel.

[0046] Example 2

[0047] In order to better understand the present invention, this embodiment provides a more specific example for illustration; this example provides a pixel compensation method, which specifically includes the following steps:

[0048] 1. Two sets of voltages are preset for the blue and green LEDs (pixels) during display: one set is for normal display, and the other set is for compensating for reddish tints. This increases the current flowing through the blue and green LEDs, thereby improving the color cast. It should be understood that the pixels in a display panel include, but are not limited to, red, green, and blue pixels.

[0049] 2. It is understood that the display panel uses an LED common anode drive architecture. It controls the voltage at the LED cathode to change the voltage at both ends of the LED, thereby changing the current flowing through the LED and thus controlling the LED brightness.

[0050] 3. To set the threshold current, we first collect the grayscale data when the low-gray reddish screen just appears, and then calculate the threshold current based on the relationship between brightness and current.

[0051] 4. If Figure 2 As shown, we integrate data reading and analysis module 1 and voltage selection circuit 2 inside the driver IC (pixel driver circuit). The data to be displayed is analyzed by data reading and analysis module 1, and the data to be displayed in the next row is analyzed by algorithm to obtain the current of the corresponding LED, which is then compared with the current threshold we set, and then control signal 1 and control signal 2 are output to control the output of two sets of voltages. Voltage 1 and voltage 2 are the normal display voltage and low gray compensation voltage respectively. When the control signal 1 output by the control switch Q1 is high, voltage 1 is output, and when the control signal 2 output by the control switch Q2 is high, voltage 2 is output. The timing of voltage 1 and voltage 2 is as follows Figure 3 shown.

[0052] 5. Specific control process such as Figure 4 As shown, the device first reads data and calculates the predicted LED current. When the calculated predicted current is lower than the set threshold current, a control signal 2 is output, causing the voltage selection circuit to output a voltage of 2. When the calculated current is higher than the set threshold, a control signal 1 is output, causing the voltage selection circuit to output a voltage of 1. This increases the current flowing through the blue and green LEDs in low grayscale displays, thereby achieving white balance in low grayscale conditions.

[0053] The pixel compensation method provided in this example increases the current flowing through the LED by increasing the voltage depth without changing the duty cycle of the scanning signal, thereby achieving white balance of the LED, thereby avoiding the problem of abnormal display of the display panel caused by the small current flowing through the LED under low gray levels.

[0054] Example 3

[0055] Based on the same concept, this embodiment provides a pixel driving circuit, such as Figure 5As shown, the pixel driving circuit includes: a data reading and analysis module 1 and a voltage selection circuit 2, wherein the data reading and analysis module 1 is used to obtain the picture to be displayed, and calculate the predicted current passing through the pixel of the display panel when displaying the picture to be displayed based on the picture to be displayed; compare the predicted current with the threshold current to determine whether the pixel is in a low current state when displaying the picture to be displayed; and the voltage selection module is used to switch the driving voltage of the picture to be displayed to a compensation voltage when determining that the pixel is in the low current state when displaying the picture to be displayed.

[0056] In some examples, the data reading and analysis module 1 is also used to obtain the grayscale data of the pixel when the pixel performs low grayscale display and the display is abnormal; based on the correspondence between the grayscale data and the current, obtain the current value corresponding to the grayscale data, and use the current value as the threshold current.

[0057] In some examples, the data reading and analysis module 1 is further configured to compare the predicted current with the threshold current; if the predicted current is not higher than the threshold current, it is determined that the pixel is in a low current state when displaying the image to be displayed.

[0058] In some examples, the voltage selection circuit 2 is further configured to drive the pixel to emit light according to the compensation voltage if the current display image is completed.

[0059] In some examples, the data reading and analysis module 1 is also used to obtain the picture to be displayed, and determine whether the pixel is in a low grayscale state when displaying the picture to be displayed based on the picture to be displayed; if the pixel is in a low grayscale state when displaying the picture to be displayed, the predicted current is calculated based on the picture to be displayed.

[0060] In some examples, if the pixel indicating the image to be displayed is not in a low grayscale state, the driving voltage is set to drive the image to be displayed.

[0061] The pixel driving circuit provided in this example includes: a data reading and analysis module and a voltage selection circuit, wherein the data reading and analysis module is used to obtain the picture to be displayed, and calculate the predicted current passing through the pixel of the display panel when displaying the picture to be displayed based on the picture to be displayed; compare the predicted current with the threshold current to determine whether the pixel is in a low current state when displaying the picture to be displayed; the voltage selection module is used to switch the driving voltage of the picture to be displayed to a compensation voltage when determining that the pixel is in the low current state when displaying the picture to be displayed, so as to subsequently drive the pixel to display the picture to be displayed by the compensation voltage, so that when the pixel displays the picture to be displayed, the pixel is not in a low current state, the current passing through the pixel is normal, and then the pixel displays the picture to be displayed normally, thereby avoiding the problem that when the display panel displays the picture to be displayed, some pixels display darkly and some display brightly, resulting in abnormal display of the entire display panel.

[0062] Example 4

[0063] Based on the same concept, this embodiment provides a display device, which includes: a frame 3 and a display panel 4, wherein the display panel 4 is provided with a plurality of pixels arranged in an array, and the pixels are driven by the pixel compensation method as described in any of the above items.

[0064] Among them, the pixel compensation method includes: obtaining a picture to be displayed, and calculating the predicted current of the pixels of the display panel when displaying the picture to be displayed based on the picture to be displayed; comparing the predicted current with the threshold current to determine whether the pixel is in a low current state when displaying the picture to be displayed; if it is determined that the pixel is in the low current state when displaying the picture to be displayed, switching the driving voltage of the picture to be displayed to the compensation voltage, and subsequently driving the pixel to display the picture to be displayed by the compensation voltage, so that when the pixel displays the picture to be displayed, the pixel is not in a low current state, the current passing through the pixel is normal, and then the pixel displays the picture to be displayed normally, thereby avoiding the problem that when the display panel displays the picture to be displayed, some pixels display darkly and some display brightly, resulting in abnormal display of the entire display panel.

[0065] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0066] The foregoing description is intended only to provide specific embodiments of the present invention, which will enable those skilled in the art to understand and implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not intended to be limited to the embodiments shown herein, but is intended to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A pixel compensation method, characterized in that: The pixel compensation method comprises: Acquiring a picture to be displayed, and calculating, based on the picture to be displayed, a predicted current passing through a pixel of a display panel when displaying the picture to be displayed, including: acquiring the picture to be displayed, and determining, based on the picture to be displayed, whether the pixel is in a low grayscale state when displaying the picture to be displayed; if the pixel is in a low grayscale state when displaying the picture to be displayed, calculating the predicted current based on the picture to be displayed; Comparing the predicted current with a threshold current to determine whether the pixel is in a low current state when displaying the image to be displayed; If it is determined that the pixel is in the low current state when displaying the image to be displayed, the driving voltage of the image to be displayed is switched to the compensation voltage.

2. The pixel compensation method according to claim 1, wherein: Before comparing the predicted current with the threshold current, the method further includes: When the pixel performs low grayscale display and the display is abnormal, obtaining grayscale data of the pixel; Based on the correspondence between the grayscale data and the current, a current value corresponding to the grayscale data is acquired, and the current value is used as the threshold current.

3. The pixel compensation method according to claim 1, wherein: Comparing the predicted current with a threshold current to determine whether the pixel is in a low current state when displaying the image to be displayed includes: comparing the predicted current with the threshold current; If the predicted current is not higher than the threshold current, it is determined that the pixel is in a low current state when displaying the image to be displayed.

4. The pixel compensation method according to claim 1, wherein: If it is determined that the pixel is in the low current state when displaying the image to be displayed, after switching the driving voltage of the image to be displayed to the compensation voltage, the method further includes: If the current display image is completed, the pixel is driven according to the compensation voltage to perform light-emitting display.

5. The pixel compensation method according to claim 1, wherein: If the pixel indicates that the image to be displayed is not in a low grayscale state, the driving voltage is set to drive the image to be displayed.

6. A pixel driving circuit, characterized in that: The pixel driving circuit includes: a data reading and analysis module and a voltage selection circuit, wherein: The data reading and analysis module is used to obtain a picture to be displayed, calculate a predicted current passing through a pixel of the display panel when displaying the picture to be displayed based on the picture to be displayed; compare the predicted current with a threshold current to determine whether the pixel is in a low current state when displaying the picture to be displayed; The voltage selection circuit is configured to switch the driving voltage of the picture to be displayed to the compensation voltage when determining that the pixel is in the low current state when displaying the picture to be displayed; Among them, the data reading and analysis module is also used to obtain the picture to be displayed, and determine whether the pixel is in a low grayscale state when displaying the picture to be displayed based on the picture to be displayed; if the pixel is in a low grayscale state when displaying the picture to be displayed, calculate the predicted current based on the picture to be displayed.

7. The pixel driving circuit according to claim 6, wherein: The data reading and analysis module is also used to obtain the grayscale data of the pixel when the pixel performs low grayscale display and the display is abnormal; based on the corresponding relationship between the grayscale data and the current, obtain the current value corresponding to the grayscale data, and use the current value as the threshold current.

8. A display device, characterized in that: The display device includes: a frame and a display panel, wherein the display panel is provided with a plurality of pixels arranged in an array, and the pixels are driven by the pixel compensation method according to any one of claims 1 to 5.

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