Array substrate, detection method thereof and display panel

Abstract

The invention 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, and each 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, and the cathode of the light-emitting module is connected with a second power line; the driving module is used for generating driving current according to data voltage of a control end of the driving module in a light-emitting stage 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. According to the array substrate provided by the invention, the control unit is utilized, the voltage of the cathode of the light-emitting module is boosted in the light-emitting stage, so that the ghost shadow of the light-emitting module is clearer, the ghost shadow of the light-emitting module can be observed more visually, and the poor material of the light-emitting module can be identified accurately.

Description

Technical Field

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

[0002] With the continuous development of display technology, flat-panel display devices based on organic light emitting diode (OLED) technology have been widely used in various consumer electronic products such as mobile phones, televisions, laptops, desktop computers, etc. due to their advantages of high image quality, power saving, thin body and wide application range, becoming the mainstream in display devices.

[0003] In order to ensure the display effect, the display module needs to be inspected to identify the defective modules. However, the current inspection scheme cannot accurately identify some defects, such as the residual image of the light-emitting module. Summary of the invention

[0004] In view of this, the purpose of the present application is to provide an array substrate that can more intuitively observe the afterimage of the light-emitting module, so as to accurately identify the light-emitting module with defective materials.

[0005] Based on the above purpose, the present application provides an array substrate, which includes:

[0006] A control unit and a plurality of pixel driving circuits, wherein the control unit is connected to the pixel driving circuits, and the pixel driving circuits include a driving module and a light emitting module;

[0007] The first end of the driving module is connected to the first power line, the second end of the driving module is connected to the anode of the light emitting module, and the cathode of the light emitting module is used to connect to the second power line;

[0008] The driving module is used to generate a driving current according to the data voltage of its control terminal in the light-emitting stage to drive the light-emitting module to emit light;

[0009] The control unit is used to increase the voltage of the cathode of the light emitting module during the light emitting stage.

[0010] Preferably, the control unit is used to increase the voltage of the cathode of the light-emitting module to 0V during the light-emitting stage;

[0011] Preferably, the control unit is used to disconnect the second power line during the light-emitting stage, and increase the voltage of the cathode of the light-emitting module to 0V.

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

[0013] A data writing module, wherein the control end of the data writing module is connected to the second scanning signal line, the first end of the data writing module is connected to the data line, and the second end of the data writing module is connected to the first end of the driving module. The data writing module is used to respond to the signal on the second scanning signal line and write a voltage related to the data voltage on the data line to the control end of the driving module during the data writing stage.

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

[0015] a storage module, the storage module being connected to the control end of the driving module and being used to store the voltage of the control end of the driving module;

[0016] Preferably, 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.

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

[0018] a first light-emitting control module, wherein the second end of the first light-emitting control module is connected to the first end of the driving module, the control end of the first light-emitting control module is connected to a light-emitting control signal line, and the first light-emitting control module is used to respond to a signal on the light-emitting control signal line to be turned on during the light-emitting stage;

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

[0020] A second light-emitting control module, wherein the first end of the second light-emitting control module is connected to the second end of the driving module, the control end of the second light-emitting control module is connected to a light-emitting control signal line, the second end of the light-emitting control module is connected to an anode of the light-emitting module, and the second light-emitting control module is used to respond to a signal on the light-emitting control signal line to be turned on during the light-emitting stage.

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

[0022] a first reset module, wherein a control end of the first reset module is connected to a first scanning signal line, a first end of the first reset module is connected to a control end of the driving module, a second end of the first reset module is connected to a reference signal line, and the first reset module is used to reset the control end of the driving module;

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

[0024] a second reset module, wherein a control end of the second reset module is connected to the first scan signal line, a first end of the second reset module is connected to the anode of the light emitting module, a second end of the second reset module is connected to the reference signal line, and the second reset module is used to reset the anode of the light emitting module;

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

[0026] A compensation module, wherein the control end of the compensation module is connected to the second scanning signal line, the first end of the compensation module is connected to the control end of the driving module, the second end of the compensation module is connected to the second end of the driving module, and the compensation module is used to compensate for the threshold voltage of the driving module.

[0027] Based on the same inventive concept, the present application also discloses an array substrate detection method, which is applied to the above-mentioned array substrate. The array substrate detection method includes:

[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 terminal 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, including:

[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, comprising:

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

[0033] Preferably, the pixel driving circuit further includes a data writing module, a control end of the data writing module is connected to the second scanning signal line, a first end of the data writing module is connected to the data line, and a second end of the data writing module is connected to the first end of the driving module; characterized in that the array substrate detection method further includes:

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

[0035] Based on the same inventive concept, the present application also discloses a display panel, which includes the above-mentioned array substrate.

[0036] Compared with the prior art, an array substrate provided in the present application utilizes a control unit to increase the voltage of the cathode of the light-emitting module during the light-emitting stage, so that the voltage difference at both ends of different light-emitting modules becomes smaller at the same time, resulting in the same current drop value in different light-emitting modules. 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, and the brightness of the red light-emitting module and the blue light-emitting module decreases less. The red and blue light will be more obvious, and the afterimage of the light-emitting module will be clearer. The afterimage of the light-emitting module can be observed more intuitively, which is convenient for accurately identifying defective light-emitting module materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the present application or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

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

[0039] Figure 2 is a schematic diagram of a control unit and a pixel driving circuit in an array substrate in an embodiment of the present application;

[0040] Figure 3 This is a schematic diagram of a control unit and a pixel driving circuit in an array substrate according to another embodiment of the present application;

[0041] Figure 4 is a schematic diagram of a pixel driving circuit in another embodiment of the present application;

[0042] Figure 5 for Figure 4 The timing diagram corresponding to the pixel driving circuit in FIG.

[0043] Figure 6 Flow chart of an array substrate detection method in another embodiment of the present application. DETAILED DESCRIPTION

[0044] In order to make the objectives, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0045] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should be the usual meanings understood by people with ordinary skills in the field to which the present application belongs. The "first", "second" and similar words used in the embodiments of the present application do not represent any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements or objects appearing in front of the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like 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 mobile phones now use OLED displays, which display screen content through very small light-emitting devices. These light-emitting devices are similar to light bulbs at home, and they will dim after a long time of use. Due to the unevenness of TFT (Thin Film Transistor), the brightness of the light-emitting devices decays at different speeds in different light and dark areas of the screen, that is, the decay speeds of red, green, and blue pixels are different. When the mobile phone screen stays on a certain screen for a long time, the brightness difference between different areas of the screen is relatively large. When switching to other screens, image retention may appear on the screen. Image retention can be roughly divided into two categories. One category is recoverable, including short, medium and long image retention; the other category is irrecoverable. This category often appears in the process of module reliability. Due to abnormal data transmission of the screen-on-screen power-up fixture, the module stays on one screen for a long time during the screen-on process, forming OLED image retention.

[0047] Currently, in the electrical analysis process, the OLED mode is often used to determine whether the defective module is OLED afterimage. Figure 1 As shown in the figure, the setting of OLED mode is Source Floating, the reference voltage on the reference signal line Vref is 0V, the signal on the light-emitting control signal line EM is high level, and the second power line ELVSS is connected to a negative voltage, thereby forming a voltage difference at both ends of the OLED, and the reference voltage flows directly through the OLED into the second power line VSS, wherein the arrow direction in the figure is the current flow direction. Because the OLED lighting stage does not involve the driving thin film transistor T1, this mode can be used to identify whether the OLED material is defective.

[0048] The inventors found that in OLED mode, the screen has the problem of being dark and green. In some cases, it is difficult to observe the abnormal phenomenon with the naked eye and it is difficult to identify OLED afterimages.

[0049] To this end, an embodiment of the present application provides an array substrate, based on which the problem of difficulty in identifying OLED afterimages during the existing array substrate detection process is improved.

[0050] Reference Figure 2 As shown, an embodiment of the present application provides an array substrate, which includes a control unit and a plurality of pixel driving circuits, the control unit is connected to the pixel driving circuit, the pixel driving circuit includes a driving module and a light-emitting module, the first end of the driving module is connected to a first power line, the second end of the driving module is connected to an anode of the light-emitting module, and the cathode of the light-emitting module is used to connect to a second power line; the driving module is used to generate a driving current according to a data voltage at its own control end during a light-emitting stage to drive the light-emitting module to emit light; the control unit is used to increase the voltage of the cathode of the light-emitting module during the light-emitting stage.

[0051] Among them, the first power line VDD is connected to the first power supply voltage, the second power line VSS is connected to the second power supply voltage, the first power supply voltage is a positive voltage, and the second power supply voltage is a negative voltage. Since the voltage of the second power line VSS is usually about -3V, in the OLED mode, the reference voltage on the reference signal line Vref is 0V, so the voltage difference between the two ends of the light-emitting module is about 3V. After long-term research by the inventor, it was 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, which causes the screen to be dark and green.

[0052] An array substrate provided in the present embodiment utilizes a control unit to increase the voltage of the cathode of the light-emitting module during the light-emitting stage, so that the voltage difference at both ends of different light-emitting modules becomes smaller at the same time, resulting in the same current drop value in different light-emitting modules. 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, and the brightness of the red light-emitting module and the blue light-emitting module decreases less. The red light and blue light will be more obvious, and the afterimage of the light-emitting module will be clearer. The afterimage of the light-emitting module can be observed more intuitively, which is convenient for accurately identifying defective light-emitting module materials.

[0053] In one embodiment, the control unit is used to increase the voltage of the cathode of the light emitting module to 0V during the light emitting stage.

[0054] Specifically, in the light-emitting stage, the voltage input to the anode of the light-emitting module is the difference between the first power supply voltage and the data voltage. The first power supply voltage is usually about 4.6V, and the data voltage is usually about 2V. Therefore, the voltage input 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 cathode of the light-emitting module is about 2.6V. Compared with the OLED mode, the voltage difference between the anode and cathode of the light-emitting module is significantly reduced, making the residual image of the light-emitting module clearer.

[0055] In one embodiment, the control unit is used to disconnect the second power line VSS during the light-emitting stage, and increase the voltage of the cathode of the light-emitting module to 0V. Compared with other voltage-boosting methods, directly disconnecting the second power line VSS is simpler and easier. 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., which can further reduce the voltage difference between the anode and cathode of the light-emitting module, making the residual image of the light-emitting module clearer.

[0056] Reference Figure 3 As shown, in one embodiment, the pixel driving circuit also includes a data writing module, the control end of the data writing module is connected to the second scanning signal line SCAN2, the first end of the data writing module is connected to the data line VData, and the second end of the data writing module is connected to the first end of the driving module. The data writing module is used to respond to the signal on the second scanning signal line SCAN2, and write a voltage related to the data voltage on the data line to the control end of the driving module in the data writing stage, so that the driving module generates a driving current according to the data voltage in the light-emitting stage to drive the light-emitting module to emit light.

[0057] Please continue to refer to Figure 3 As shown, in one embodiment, the pixel driving circuit also includes a storage module, which is connected to the control end of the driving module and is used to store the voltage of the control end of the driving module; further, the storage module includes 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 As shown, in one embodiment, the pixel driving circuit also includes a first light-emitting control module, the second end of the first light-emitting control module is connected to the first end of the driving module, the control end of the first light-emitting control module is connected to the light-emitting control signal line EM, and the first light-emitting control module is used to respond to the signal on the light-emitting control signal line EM and be turned on during the light-emitting stage, so as to avoid the light-emitting module from emitting light during the data writing stage.

[0059] Please continue to refer to Figure 3As shown, in one embodiment, the pixel driving circuit also includes a second light-emitting control module, a first end of the second light-emitting control module is connected to the second end of the driving module, a control end of the second light-emitting control module is connected to the light-emitting control signal line EM, a second end of the light-emitting control module is connected to the anode of the light-emitting module, and the second light-emitting control module is used to respond to the signal on the light-emitting control signal line EM to be turned on during the light-emitting stage, so as to further prevent the light-emitting module from emitting light during the data writing stage.

[0060] Please continue to refer to Figure 3 As shown, in one embodiment, the pixel driving circuit also includes a first reset module, the control end of the first reset module is connected to the first scanning signal line SCAN1, the first end of the first reset module is connected to the control end of the driving module, and the second end of the first reset module is connected to the reference signal line Vref. The first reset module is used to reset the control end of the driving module 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 includes a second reset module, the control end of the second reset module is connected to the first scan signal line SCAN1, the first end of the second reset module is connected to the anode of the light emitting module, the second end of the second reset module is connected to the reference signal line Vrefn, and the second reset module is used to reset the anode of the light emitting module to improve the light emitting effect of the light emitting module. Preferably, the second reset module resets the anode of the light emitting module during the data writing stage, which can effectively save time.

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

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

[0064] Another embodiment of the present application discloses an array substrate detection method, which is applied to the array substrate in the above embodiment. The array substrate detection method includes 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 terminal 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 at a low level, the signal on the first scanning signal line SCAN1 is at a high level, the signal on the second scanning signal line SCAN2 is at a high level, the transistors T5 and T6 are turned on, and the transistors T2, T3, T4, and T7 are turned off. The light-emitting stage corresponds to Figure 5 Medium T3.

[0066] An array substrate detection method provided in the present embodiment utilizes a control unit to increase the voltage of the cathode of the light-emitting module during the light-emitting stage, so that the voltage difference across different light-emitting modules becomes smaller at the same time, resulting in the same current drop value in different light-emitting modules. 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, and the brightness of the red light-emitting module and the blue light-emitting module decreases less. The red and blue light will be more obvious, and the afterimage of the light-emitting module will be clearer. The afterimage of the light-emitting module can be observed more intuitively, which is convenient for accurately identifying defective light-emitting module materials.

[0067] In one embodiment, in step S10, the control unit increases the voltage of the cathode of the light emitting module, including: the control unit increases the voltage of the cathode of the light emitting module to 0 V. Compared with the OLED mode, the voltage difference between the anode and 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 line VSS and increases the voltage of the cathode of the light emitting module to 0V. Compared with other voltage-boosting methods, directly disconnecting the second power line VSS is simpler and easier. 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] Reference Figure 6 As shown, 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 responds to the signal on the second scanning signal line SCAN2, and writes a voltage related to the data voltage on the data line to the control end of the driving module. In the data writing stage, the signal on the light emitting control signal line EM is high level, the signal on the first scanning signal line SCAN1 is high level, the signal on the second scanning 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 responds to the signal on the second scanning signal line SCAN2, and writes a voltage related to the data voltage on the data line to the control end of the transistor T1; 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 Medium T2.

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

[0072] During the reset phase (corresponding to Figure 5 In the embodiment of the present invention, the signal on the light emitting control signal line EM is at a high level, the signal on the first scanning signal line SCAN1 is at a low level, the signal on the second scanning signal line SCAN2 is at a 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, specifically initializing the storage capacitor Cst.

[0073] Another embodiment of the present application discloses a display panel, which includes the array substrate in the above embodiment. The display panel can be mounted on a smart device (such as a mobile phone, VR device, computer, TV, car display, etc.).

[0074] The display panel in the present embodiment, whose array substrate utilizes a control unit, increases the voltage of the cathode of the light-emitting module during the light-emitting stage, so that the voltage difference across different light-emitting modules becomes smaller at the same time, resulting in the same current drop value in different light-emitting modules. Since the efficiency of green light is higher than that of red and blue light, the brightness of the green light-emitting module decreases more, while the brightness of the red and blue light-emitting modules decreases less. The red and blue light will be more obvious, and the afterimage of the light-emitting module will be clearer. The afterimage of the light-emitting module can be observed more intuitively, which is convenient for accurately identifying defective light-emitting module materials.

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

[0076] It should be noted that the above describes some embodiments of the present 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 an order different from that in the above embodiments and still achieve the desired results. In addition, the processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0077] The embodiments of the present 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 the present application should be included in the scope of protection of the present application.

Claims

1. An array substrate, characterized in that: include: A control unit and a plurality of pixel driving circuits, wherein the control unit is connected to the pixel driving circuits, and the pixel driving circuits include a driving module and a light emitting module; The first end of the driving module is connected to the first power line, the second end of the driving module is connected to the anode of the light emitting module, and the cathode of the light emitting module is used to connect to the second power line; The driving module is used to generate a driving current according to the data voltage of its control terminal in the light-emitting stage to drive the light-emitting module to emit light; The control unit is used to increase the voltage of the cathode of the light emitting module during the light emitting stage.

2. The array substrate according to claim 1, characterized in that: The control unit is used to increase the voltage of the cathode of the light emitting module to 0V during the light emitting stage; Preferably, the control unit is used to disconnect the second power line during the light-emitting stage, and increase the voltage of the cathode of the light-emitting module to 0V.

3. The array substrate according to claim 1, characterized in that: The pixel driving circuit further includes: A data writing module, wherein the control end of the data writing module is connected to the second scanning signal line, the first end of the data writing module is connected to the data line, and the second end of the data writing module is connected to the first end of the driving module. The data writing module is used to respond to the signal on the second scanning signal line and write a voltage related to the data voltage on the data line to the control end of the driving module during the data writing stage.

4. The array substrate according to claim 1, wherein: The pixel driving circuit further includes: a storage module, the storage module being connected to the control end of the driving module and being used to store the voltage of the control end of the driving module; Preferably, 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.

5. The array substrate according to claim 1, characterized in that: The pixel driving circuit further includes: a first light-emitting control module, wherein the second end of the first light-emitting control module is connected to the first end of the driving module, the control end of the first light-emitting control module is connected to a light-emitting control signal line, and the first light-emitting control module is used to respond to a signal on the light-emitting control signal line to be turned on during the light-emitting stage; Preferably, the pixel driving circuit further includes: A second light-emitting control module, wherein the first end of the second light-emitting control module is connected to the second end of the driving module, the control end of the second light-emitting control module is connected to a light-emitting control signal line, the second end of the light-emitting control module is connected to an anode of the light-emitting module, and the second light-emitting control module is used to respond to a signal on the light-emitting control signal line to be turned on during the light-emitting stage.

6. The array substrate according to claim 1, characterized in that: The pixel driving circuit further includes: a first reset module, wherein a control end of the first reset module is connected to a first scanning signal line, a first end of the first reset module is connected to a control end of the driving module, a second end of the first reset module is connected to a reference signal line, and the first reset module is used to reset the control end of the driving module; Preferably, the pixel driving circuit further includes: a second reset module, wherein a control end of the second reset module is connected to the first scan signal line, a first end of the second reset module is connected to the anode of the light emitting module, a second end of the second reset module is connected to the reference signal line, and the second reset module is used to reset the anode of the light emitting module; Preferably, the pixel driving circuit further includes: A compensation module, wherein the control end of the compensation module is connected to the second scanning signal line, the first end of the compensation module is connected to the control end of the driving module, the second end of the compensation module is connected to the second end of the driving module, and the compensation module is used to compensate for the threshold voltage of the driving module.

7. An array substrate detection method, applied to the array substrate according to any one of claims 1 to 6, characterized in that: The array substrate detection method comprises: 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 terminal of the driving module to drive the light-emitting module to emit light.

8. The array substrate detection method according to claim 7, characterized in that: The control unit increases the voltage of the cathode of the light emitting module, including: The control unit increases the voltage of the cathode of the light emitting module to 0V; Preferably, the control unit increases the voltage of the cathode of the light emitting module to 0V, comprising: The control unit disconnects the second power line and increases the voltage of the cathode of the light emitting module to 0V.

9. The array substrate detection method according to claim 7, wherein the pixel driving circuit further comprises a data writing module, wherein a control end of the data writing module is connected to the second scanning signal line, a first end of the data writing module is connected to the data line, and a second end of the data writing module is connected to the first end of the driving module; characterized in that The array substrate detection method further includes: In the data writing stage, the data writing module responds to the signal on the second scanning signal line and writes a voltage related to the data voltage on the data line to the control end of the driving module.

10. A display panel, characterized in that: It comprises the array substrate as described in any one of claims 1 to 6.

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