Array substrate, detection method thereof and display panel

Abstract

The application provides an array substrate, a detection method thereof and a display panel. The array substrate comprises a control unit and a plurality of pixel driving circuits. The control unit is connected with the pixel driving circuits. The pixel driving circuit comprises a driving module and a light-emitting module. The first end of the driving module is connected with a first power line. The second end of the driving module is connected with the anode of the light-emitting module. The cathode of the light-emitting module is used for connecting a second power line. The driving module is used for generating a driving current according to the data voltage of the control end of the driving module in a light-emitting stage, so as to drive the light-emitting module to emit light. The control unit is used for increasing the voltage of the cathode of the light-emitting module in the light-emitting stage. The array substrate provided by the application increases the voltage of the cathode of the light-emitting module in the light-emitting stage by using the control unit, so that the residual image of the light-emitting module is clearer. The residual image of the light-emitting module can be observed more directly, and the material defect of the light-emitting module can be accurately identified.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to an array substrate and a detection method thereof, and a display panel. BACKGROUND

[0002] With the continuous development of display technology, flat panel display devices based on organic light emitting diode (Organic Light Emitting Display, OLED) technology have been widely used in mobile phones, televisions, notebook computers, desktop computers and other consumer electronic products due to their high image quality, power saving, thin body and wide application range, and have become the mainstream of display devices.

[0003] In order to ensure the display effect, it is necessary to detect the display module to identify the defective module. However, the current detection scheme cannot accurately identify some defects, such as light emitting module residual image. SUMMARY

[0004] Therefore, the purpose of the present application is to provide an array substrate which can more intuitively observe the light emitting module residual image and facilitate accurate identification of light emitting module material defects.

[0005] To achieve the above purpose, the present application provides an array substrate, which comprises:

[0006] a control unit and a plurality of pixel driving circuits, the control unit being connected with the pixel driving circuits, and the pixel driving circuit comprising a driving module and a light emitting module;

[0007] a first end of the driving module being connected with a first power line, a second end of the driving module being connected with an anode of the light emitting module, and a cathode of the light emitting module being used for connecting a second power line;

[0008] the driving module being used for generating a driving current according to a data voltage of a control end of itself in a light emitting stage to drive the light emitting module to emit light;

[0009] the control unit being used for raising a voltage of the cathode of the light emitting module in the light emitting stage.

[0010] Preferably, the control unit is used for raising the voltage of the cathode of the light emitting module to 0V in the light emitting stage.

[0011] Preferably, the control unit is used for disconnecting the second power line and raising the voltage of the cathode of the light emitting module to 0V in the light emitting stage.

[0012] Preferably, the pixel driving circuit further comprises:

[0013] a data writing module, a control terminal of the data writing module being connected with the second scan signal line, a first terminal of the data writing module being connected with the data line, and a second terminal of the data writing module being connected with the first terminal of the driving module, the data writing module being configured to write a voltage related to a data voltage on the data line to the control terminal of the driving module in a data writing stage in response to a signal on the second scan signal line.

[0014] Preferably, the pixel driving circuit further comprises:

[0015] a storage module, a control terminal of the storage module being connected with the control terminal of the driving module, the storage module being configured to store a voltage of the control terminal of the driving module;

[0016] Preferably, the storage module comprises a storage capacitor, a first terminal of the storage capacitor being connected with the control terminal of the driving module, and a second terminal of the storage capacitor being connected with the first terminal of the driving module.

[0017] Preferably, the pixel driving circuit further comprises:

[0018] a first light emitting control module, a second terminal of the first light emitting control module being connected with the first terminal of the driving module, and a control terminal of the first light emitting control module being connected with a light emitting control signal line, the first light emitting control module being configured to be turned on in the light emitting stage in response to a signal on the light emitting control signal line.

[0019] Preferably, the pixel driving circuit further comprises:

[0020] a second light emitting control module, a first terminal of the second light emitting control module being connected with the second terminal of the driving module, and a control terminal of the second light emitting control module being connected with the light emitting control signal line, a second terminal of the second light emitting control module being connected with the anode of the light emitting module, the second light emitting control module being configured to be turned on in the light emitting stage in response to a signal on the light emitting control signal line.

[0021] Preferably, the pixel driving circuit further comprises:

[0022] a first reset module, a control terminal of the first reset module being connected with the first scan signal line, a first terminal of the first reset module being connected with the control terminal of the driving module, and a second terminal of the first reset module being connected with a reference signal line, the first reset module being configured to reset the control terminal of the driving module.

[0023] Preferably, the pixel driving circuit further comprises:

[0024] A second reset module, a control end of the second reset module is connected with the first scan signal line, a first end of the second reset module is connected with the anode of the light emitting module, and a second end of the second reset module is connected with the reference signal line, and the second reset module is used for resetting the anode of the light emitting module.

[0025] Preferably, the pixel driving circuit further comprises:

[0026] A compensation module, a control end of the compensation module is connected with the second scan signal line, a first end of the compensation module is connected with the control end of the driving module, and a second end of the compensation module is connected with the second end of the driving module, and the compensation module is used for compensating the threshold voltage of the driving module.

[0027] Based on the same inventive concept, the application further discloses an array substrate detection method applied to the array substrate, and the array substrate detection method comprises:

[0028] In the light emitting stage, the control unit increases the voltage of the cathode of the light emitting module, and the driving module generates a driving current according to the data voltage of the control end of the driving module to drive the light emitting module to emit light.

[0029] Preferably, the control unit increases the voltage of the cathode of the light emitting module, and the control unit comprises:

[0030] The control unit increases the voltage of the cathode of the light emitting module to 0V.

[0031] Preferably, the control unit increases the voltage of the cathode of the light emitting module to 0V, and the control unit comprises:

[0032] The control unit disconnects the second power supply line, and increases the voltage of the cathode of the light emitting module to 0V.

[0033] Preferably, the pixel driving circuit further comprises a data writing module, a control end of the data writing module is connected with the second scan signal line, a first end of the data writing module is connected with the data line, and a second end of the data writing module is connected with the first end of the driving module; and the array substrate detection method further comprises:

[0034] In the data writing stage, the data writing module writes a voltage related to the data voltage on the data line to the control end of the driving module in response to a signal on the second scan signal line.

[0035] Based on the same inventive concept, the application further discloses a display panel comprising the array substrate.

[0036] Compared with the prior art, the array substrate provided by the application utilizes the control unit to increase the voltage of the cathode of the light-emitting module in the light-emitting stage, so that the voltage difference between the two ends of different light-emitting modules is simultaneously reduced, resulting in the same current value drop in different light-emitting modules, and since the efficiency of green light is higher than that of red light and blue light, the luminance of the green light-emitting module drops more, the luminance of the red light-emitting module and the blue light-emitting module drops less, the red light and the blue light are more obvious, the residual image of the light-emitting module is clearer, and the residual image of the light-emitting module can be more directly observed, so that the material defect of the light-emitting module can be accurately identified. BRIEF DESCRIPTION OF DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the application or related art, the drawings needed to be used in the embodiments or related art description will be briefly introduced. Obviously, the drawings in the following description are only embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0038] Figure 1 It is a schematic diagram of a related pixel driving circuit in OLED mode;

[0039] Figure 2 It is a schematic diagram of a related pixel driving circuit in OLED mode;

[0040] Figure 3 It is a schematic diagram of a related pixel driving circuit in OLED mode;

[0041] Figure 4 It is a schematic diagram of a related pixel driving circuit in OLED mode;

[0042] Figure 5 It is a schematic diagram of a related pixel driving circuit in OLED mode; Figure 4

[0043] Figure 6 It is a schematic diagram of a related pixel driving circuit in OLED mode; DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solutions and advantages of the application more clear, the application will be further described in detail below in combination with specific embodiments and with reference to the drawings.

[0045] ​It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this application should have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," and similar terms used in the embodiments of this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0046] Most modern mobile phones use OLED displays, which use tiny light-emitting devices to display content. These devices are similar to light bulbs in a home, dimming over time. Due to the non-uniformity of TFT (Thin Film Transistor), the brightness of the light-emitting devices varies across different bright and dark areas of the screen; specifically, the red, green, and blue pixels decay at different rates. When a phone screen remains on a particular image for an extended period, the brightness difference between different areas is significant. When switching to other images, image retention may occur. Image retention can be broadly categorized into two types: recoverable and non-recoverable. Non-recoverable non ...

[0047] Currently, in electrical analysis, the OLED model is frequently used to determine whether a defective module exhibits OLED retention. (Refer to...) Figure 1 As shown, the OLED mode is set to Source Floating, with a reference voltage of 0V on the reference signal line Vref, a high level signal on the light emission control signal line EM, and a negative voltage applied to the second power line ELVSS. This creates a voltage difference across the OLED, and the reference voltage flows directly through the OLED into the second power line VSS. The arrows in the diagram indicate the current flow direction. Because the OLED lighting phase does not involve driving the thin-film transistor T1, this mode can be used to identify whether the OLED material is defective.

[0048] The inventors find that in the OLED mode, the screen has the problems of darkening and green emission, and in some cases, the abnormal phenomenon is difficult to observe by naked eyes, and it is difficult to identify the OLED residual image.

[0049] To this end, an embodiment of the present application provides an array substrate, which is based on the array substrate to improve the problem that it is difficult to identify the OLED residual image in the existing array substrate detection process.

[0050] With reference to Figure 2 An embodiment of the present application provides an array substrate, which comprises a control unit and a plurality of pixel driving circuits, the control unit is connected with the pixel driving circuits, the pixel driving circuit comprises a driving module and a light-emitting module, a first end of the driving module is connected with a first power line, a second end of the driving module is connected with an anode of the light-emitting module, and a cathode of the light-emitting module is used to connect a second power line; the driving module is used to generate a driving current according to a data voltage of a control terminal thereof in a light-emitting stage, so as to drive the light-emitting module to emit light; and the control unit is used to raise a voltage of the cathode of the light-emitting module in the light-emitting stage.

[0051] Wherein, the first power line VDD is connected with a first power voltage, the second power line VSS is connected with a second power voltage, the first power voltage is a positive voltage, and the second power voltage is a negative voltage. Since the voltage of the second power line VSS is usually about -3V, and the reference voltage on the reference signal line Vref is 0V in the OLED mode, the voltage difference between the two ends of the light-emitting module is about 3V. Through long-term research of the inventors, it is found that since the efficiency of green light is higher than that of red light and blue light, the greater the voltage difference, the greater the difference between the brightness of green light and the brightness of red light and blue light, thereby causing the screen to darken and emit green light.

[0052] The array substrate provided in the embodiment utilizes the control unit to raise the voltage of the cathode of the light-emitting module in the light-emitting stage, so that the voltage difference between the two ends of different light-emitting modules is simultaneously reduced, thereby causing the current values of the different light-emitting modules to be the same. Since the efficiency of green light is higher than that of red light and blue light, the brightness of the green light-emitting module decreases more, the brightness of the red light-emitting module and the blue light-emitting module decreases less, the red light and the blue light are more obvious, the residual image of the light-emitting module is more clear, the residual image of the light-emitting module can be more directly observed, and the material defect of the light-emitting module can be accurately identified.

[0053] In one of the embodiments, the control unit is used to raise the voltage of the cathode of the light-emitting module to 0V in the light-emitting stage.

[0054] Specifically, in the light emitting stage, the voltage inputted to the anode of the light emitting module is the difference between the first power voltage and the data voltage. Wherein, the first power voltage is usually about 4.6V, and the data voltage is usually about 2V, thus the voltage inputted to the anode of the light emitting module is about 2.6V, and the voltage of the cathode of the light emitting module is 0V, at this time, the voltage difference between the anode and the cathode of the light emitting module is about 2.6V, which is obviously reduced compared with the OLED mode, so that the residual image of the light emitting module is more clear.

[0055] In one embodiment, the control unit is configured to disconnect the second power line VSS in the light emitting stage, and raise the voltage of the cathode of the light emitting module to 0V. Compared with other boosting methods, directly disconnecting the second power line VSS is simpler and more convenient. In another embodiment, the control unit can also control the voltage of the cathode of the light emitting module to be raised to 0.5V, 1V, 1.5V, etc., so as to further reduce the voltage difference between the anode and the cathode of the light emitting module, and make the residual image of the light emitting module more clear.

[0056] Referring to Figure 3 In one embodiment, the pixel driving circuit further comprises a data writing module, a control end of the data writing module is connected to the second scan signal line SCAN2, a first end of the data writing module is connected to the data line VData, and a second end of the data writing module is connected to the first end of the driving module. The data writing module is configured to write a voltage related to the data voltage on the data line to the control end of the driving module in response to a signal on the second scan signal line SCAN2, so as to facilitate the driving module to generate a driving current according to the data voltage in the light emitting stage, so as to drive the light emitting module to emit light.

[0057] Please continue to refer to Figure 3 In one embodiment, the pixel driving circuit further comprises a storage module, the storage module is connected to the control end of the driving module, and is configured to store the voltage of the control end of the driving module. Further, the storage module comprises a storage capacitor, a first end of the storage capacitor is connected to the control end of the driving module, and a second end of the storage capacitor is connected to the first end of the driving module.

[0058] Please continue to refer to Figure 3 In one embodiment, the pixel driving circuit further comprises a first light emitting control module, a second end of the first light emitting control module is connected to the first end of the driving module, and a control end of the first light emitting control module is connected to the light emitting control signal line EM. The first light emitting control module is configured to be turned on in the light emitting stage in response to a signal on the light emitting control signal line EM, so as to avoid the light emitting module from emitting light in the data writing stage.

[0059] Please continue to refer to Figure 3As shown, in one embodiment, the pixel driving circuit further comprises a second light-emitting control module, a first end of the second light-emitting control module is connected with the second end of the driving module, a control end of the second light-emitting control module is connected with the light-emitting control signal line EM, a second end of the light-emitting control module is connected with the anode of the light-emitting module, and the second light-emitting control module is used to turn on in the light-emitting stage in response to the signal on the light-emitting control signal line EM, thereby further avoiding the light-emitting module from emitting light in the data writing stage.

[0060] Please continue to refer to Figure 3 As shown, in one embodiment, the pixel driving circuit further comprises a first reset module, a control end of the first reset module is connected with the first scan signal line SCAN1, a first end of the first reset module is connected with the control end of the driving module, and a second end of the first reset module is connected with the reference signal line Vref, and the first reset module is used to reset the control end of the driving module, so as to improve the driving effect of the driving module.

[0061] Please continue to refer to Figure 3 As shown, in one embodiment, the pixel driving circuit further comprises a second reset module, a control end of the second reset module is connected with the first scan signal line SCAN1, a first end of the second reset module is connected with the anode of the light-emitting module, and a second end of the second reset module is connected with the reference signal line Vrefn, and the second reset module is used to reset the anode of the light-emitting module, so as to improve the light-emitting effect of the light-emitting module. Preferably, the second reset module resets the anode of the light-emitting module in the data writing stage, thereby effectively saving time.

[0062] Please continue to refer to Figure 3 As shown, in one embodiment, the pixel driving circuit further comprises a compensation module, a control end of the compensation module is connected with the second scan signal line SCAN2, a first end of the compensation module is connected with the control end of the driving module, a second end of the compensation module is connected with the second end of the driving module, and the compensation module is used to compensate the threshold voltage of the driving module. Preferably, the compensation module is a double-gate threshold compensation transistor, and compared with a single-gate transistor, the double-gate transistor has a lower leakage current, which is conducive to reducing the potential fluctuation of the gate of the driving module.

[0063] Refer to Figure 4 As shown, in one embodiment, the driving module comprises a transistor T1, the light-emitting module comprises an OLED or an AMOLED, the data writing module comprises a transistor T2, the compensation module comprises a transistor T3, the first reset module comprises a transistor T4, the first light-emitting control module comprises a transistor T5, the second light-emitting control module comprises a transistor T6, and the second reset module comprises a transistor T7.

[0064] Another embodiment of the present application discloses an array substrate detection method applied to the array substrate in the above-mentioned embodiments, and the array substrate detection method comprises the following steps:

[0065] S10, in the light-emitting stage, the control unit increases the voltage of the cathode of the light-emitting module, and the driving module generates a driving current according to the data voltage of the control end of the driving module to drive the light-emitting module to emit light. In the light-emitting stage, the signal on the light-emitting control signal line EM is low, the signal on the first scan signal line SCAN1 is high, the signal on the second scan signal line SCAN2 is high, the transistor T5 and the transistor T6 are turned on, and the transistors T2, T3, T4 and T7 are turned off. The light-emitting stage corresponds to Figure 5 T3.

[0066] The array substrate detection method provided in the embodiment can make the voltage difference between different light-emitting modules smaller at the same time by increasing the voltage of the cathode of the light-emitting module in the light-emitting stage by using the control unit, so that the current values of the light-emitting modules decrease by the same amount. Since the efficiency of green light is higher than that of red light and blue light, the luminance of the green light-emitting module decreases more, and the luminance of the red light-emitting module and the blue light-emitting module decreases less. The red light and the blue light will be more obvious, and the residual image of the light-emitting module will be clearer. The residual image of the light-emitting module can be observed more intuitively, and the material defect of the light-emitting module can be accurately identified.

[0067] In one embodiment, the step S10 of increasing the voltage of the cathode of the light-emitting module by the control unit includes: increasing the voltage of the cathode of the light-emitting module to 0V by the control unit. Compared with the OLED mode, the voltage difference between the anode and the cathode of the light-emitting module is significantly reduced, so that the residual image of the light-emitting module is clearer.

[0068] In one embodiment, the control unit increases the voltage of the cathode of the light-emitting module to 0V, including: the control unit disconnects the second power supply line VSS to increase the voltage of the cathode of the light-emitting module to 0V. Compared with other voltage increasing methods, directly disconnecting the second power supply line VSS is simpler and more convenient. In another embodiment, the control unit can also control the voltage of the cathode of the light-emitting module to increase to 0.5V, 1V, 1.5V, etc.

[0069] Referring to Figure 6 In one embodiment, the array substrate detection method further includes the following steps:

[0070] Step S01, in the data writing stage, the data writing module writes the voltage related to the data voltage on the data line to the control end of the driving module in response to the signal on the second scan signal line SCAN2. Wherein, in the data writing stage, the signal on the light emitting control signal line EM is high level, the signal on the first scan signal line SCAN1 is high level, the signal on the second scan signal line SCAN2 is low level, the transistor T2 and the transistor T3 are turned on, the transistor T4, the transistor T5, the transistor T6 and the transistor T7 are turned off, the transistor T2 writes the voltage related to the data voltage on the data line to the control end of the transistor T1 in response to the signal on the second scan signal line SCAN2; at the same time, the signal on the reference signal line Vref resets the anode of the light emitting module, and the data writing stage corresponds to Figure 5 T2.

[0071] In one embodiment, the array substrate detection method further comprises the following steps:

[0072] In the reset stage (corresponding Figure 5 T1), the signal on the light emitting control signal line EM is high level, the signal on the first scan signal line SCAN1 is low level, the signal on the second scan signal line SCAN2 is high level, the transistor T4 and the transistor T7 are turned on, the transistor T2, the transistor T3, the transistor T5 and the transistor T6 are turned off, and the signal on the reference signal line Vref resets the control end of the driving module, and specifically initializes the storage capacitor Cst.

[0073] Another embodiment of the present application discloses a display panel comprising the array substrate in the above-mentioned embodiments. The display panel can be mounted on a smart device (such as a mobile phone, a VR device, a computer, a television, a vehicle-mounted display, etc.).

[0074] In the display panel in the embodiment, the array substrate utilizes the control unit to increase the voltage of the cathode of the light emitting module in the light emitting stage, so that the voltage difference between the two ends of different light emitting modules is simultaneously reduced, resulting in the same current value in different light emitting modules. Since the efficiency of green light is higher than that of red light and blue light, the luminance of the green light emitting module decreases more, the luminance of the red light emitting module and the blue light emitting module decreases less, the red light and the blue light are more obvious, the residual image of the light emitting module is clearer, and the residual image of the light emitting module can be more directly observed, so that the material defect of the light emitting module can be accurately identified.

[0075] Although the present application has been described in conjunction with specific embodiments thereof, many alternatives, modifications and variations will be apparent to those skilled in the art in light of the foregoing description.

[0076] It should be noted that the above description describes some embodiments of this application. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in a different order than that shown in the above embodiments and still achieve the desired result. Furthermore, the processes depicted in the drawings do not necessarily require a specific or sequential order to achieve the desired result. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0077] The embodiments of this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the embodiments of this application should be included within the protection scope of this application.

Claims

1. An array substrate, characterized by, The pixel driving circuit comprises: a control unit and a plurality of pixel driving circuits, the control unit being connected with the pixel driving circuits, and the pixel driving circuit comprising a driving module and a light-emitting module; a first end of the driving module being connected with a first power supply line, a second end of the driving module being connected with an anode of the light-emitting module, and a cathode of the light-emitting module being used for connecting a second power supply line; the driving module being used for generating a driving current according to a data voltage of a control terminal of the driving module in a light-emitting stage to drive the light-emitting module to emit light; the control unit being used for raising a voltage of the cathode of the light-emitting module in the light-emitting stage.

2. The array substrate of claim 1, wherein, the control unit being used for raising the voltage of the cathode of the light-emitting module to 0V in the light-emitting stage.

3. The array substrate of claim 2, wherein, the control unit being used for disconnecting the second power supply line in the light-emitting stage and raising the voltage of the cathode of the light-emitting module to 0V.

4. The array substrate of claim 1, wherein, The pixel driving circuit further comprises: a data writing module, a control terminal of the data writing module being connected with a second scan signal line, a first end of the data writing module being connected with a data line, a second end of the data writing module being connected with the first end of the driving module, and the data writing module being used for writing a voltage related to a data voltage on the data line to the control terminal of the driving module in a data writing stage in response to a signal on the second scan signal line.

5. The array substrate of claim 1, wherein, The pixel driving circuit further comprises: a storage module, the storage module being connected with the control terminal of the driving module and being used for storing the voltage of the control terminal of the driving module.

6. The array substrate of claim 5, wherein, The storage module comprises a storage capacitor, a first end of the storage capacitor being connected with the control terminal of the driving module, and a second end of the storage capacitor being connected with the first end of the driving module.

7. The array substrate of claim 1, wherein, The pixel driving circuit further comprises: a first light-emitting control module, a second end of the first light-emitting control module being connected with the first end of the driving module, a control terminal of the first light-emitting control module being connected with a light-emitting control signal line, and the first light-emitting control module being used for being turned on in the light-emitting stage in response to a signal on the light-emitting control signal line.

8. The array substrate of claim 1, wherein, The pixel driving circuit further comprises: a second light-emitting control module, a first end of the second light-emitting control module being connected with the second end of the driving module, a control terminal of the second light-emitting control module being connected with the light-emitting control signal line, a second end of the second light-emitting control module being connected with the anode of the light-emitting module, and the second light-emitting control module being used for being turned on in the light-emitting stage in response to the signal on the light-emitting control signal line.

9. The array substrate of claim 1, wherein, The pixel driving circuit further comprises: a first reset module, a control terminal of the first reset module being connected with a first scan signal line, a first end of the first reset module being connected with the control terminal of the driving module, and a second end of the first reset module being connected with a reference signal line, and the first reset module being used for resetting the control terminal of the driving module.

10. The array substrate of claim 1, wherein, The pixel driving circuit further comprises: a second reset module, a control terminal of the second reset module being connected with the first scan signal line, a first end of the second reset module being connected with the anode of the light-emitting module, and a second end of the second reset module being connected with the reference signal line, and the second reset module being used for resetting the anode of the light-emitting module.

11. The array substrate of claim 1, wherein, The pixel driving circuit further comprises: The compensation module has a control end connected to the second scan signal line, a first end connected to the control end of the driving module, and a second end connected to the second end of the driving module, and is configured to compensate for the threshold voltage of the driving module.

12. An array substrate inspection method for identifying a light emitting module ghosting, applied to the array substrate according to any one of claims 1-11, characterized in that, The array substrate detection method further comprises: In the light emitting stage, the control unit raises the voltage of the cathode of the light emitting module, and the driving module generates a driving current according to the data voltage of the control end of the driving module to drive the light emitting module to emit light.

13. The method of claim 12, wherein the array substrate is detected by using a light emitting diode (LED) or a liquid crystal display (LCD) panel. The control unit raises the voltage of the cathode of the light emitting module, comprising: The control unit raises the voltage of the cathode of the light emitting module to 0V.

14. The method of claim 13, wherein the array substrate is detected by using a light emitting diode (LED) or a light receiving diode (LDR). The control unit raises the voltage of the cathode of the light emitting module to 0V, comprising: The control unit disconnects the second power supply line and raises the voltage of the cathode of the light emitting module to 0V.

15. The array substrate detection method of claim 12, wherein the pixel driving circuit further comprises a data writing module, a control terminal of the data writing module is connected to a second scan signal line, a first terminal of the data writing module is connected to a data line, and a second terminal of the data writing module is connected to the first terminal of the driving module; and wherein, The array substrate detection method further comprises: In the data writing stage, the data writing module writes a voltage related to the data voltage on the data line to the control end of the driving module in response to the signal on the second scan signal line.

16. A display panel, characterized by: An array substrate comprising any one of claims 1-11.

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