Pixel circuit, pixel unit, pixel array, display panel and electronic device

Abstract

This disclosure provides a pixel circuit, pixel unit, pixel array, display panel, and electronic device. The pixel circuit includes: a driving module and a threshold voltage compensation module connected to the driving module; the driving module provides driving current to a light-emitting element connected to the pixel circuit, and the driving module includes one or more transistors. An energy storage unit is connected between the first and second terminals of at least one transistor in the driving module, and the capacity of the energy storage unit decreases with increasing operating time; the threshold voltage compensation module provides threshold voltage compensation for the transistor in the driving module, and the threshold voltage drift of the threshold voltage compensation module increases with increasing operating time. This pixel circuit improves the display brightness stability of the light-emitting element.

Description

Technical Field

[0001] This disclosure relates to the field of displays, and more particularly to a pixel circuit, pixel unit, pixel array, display panel, and electronic device. Background Technology

[0002] The pixel circuit of a display panel typically includes a driving transistor and a threshold voltage (Vth) compensation transistor. The driving transistor is used to provide driving current to the light-emitting element, and the threshold voltage compensation transistor is used to detect and compensate for the threshold voltage deviation of the driving transistor.

[0003] However, as the pixel circuit operates for longer periods, the threshold voltage compensation transistor will experience threshold voltage drift after prolonged operation, resulting in a decrease in driving current and a reduction in the display brightness of the light-emitting element. Utility Model Content

[0004] To overcome the problems existing in related technologies, this disclosure provides a pixel circuit, a pixel unit, a pixel array, a display panel, and an electronic device.

[0005] According to a first aspect of the present disclosure, a pixel circuit is provided, comprising: a driving module and a threshold voltage compensation module connected to the driving module;

[0006] The driving module is used to provide driving current to the light-emitting element connected to the pixel circuit. The driving module includes one or more transistors. An energy storage unit is connected between the first and second terminals of at least one transistor in the driving module. The capacity of the energy storage unit decreases as the working time increases.

[0007] The threshold voltage compensation module is used to provide threshold voltage compensation for the transistors in the drive module. The threshold voltage drift of the threshold voltage compensation module increases with the increase of the operating time.

[0008] In some implementations, the energy storage unit includes a capacitor with a metal-insulator-semiconductor structure.

[0009] In some implementations, the driving module includes a first transistor, and the energy storage unit connected between a first terminal and a second terminal of the first transistor includes a first capacitor.

[0010] The threshold voltage compensation module is connected between the first and third terminals of the first transistor.

[0011] In some implementations, the driving module includes a second transistor, and the energy storage unit connected between the first and second terminals of the second transistor includes a second capacitor;

[0012] The first terminal of the second transistor is connected to the first terminal of the first transistor, and the third terminal of the second transistor is connected to the second terminal of the first transistor.

[0013] In some implementations, the driving module includes a third transistor, and the energy storage unit connected between the first and second terminals of the third transistor includes a third capacitor.

[0014] The first terminal of the third transistor is connected to the first terminal of the first transistor, and the third terminal of the third transistor is connected to the second terminal of the second transistor.

[0015] In some implementations, the threshold voltage compensation module includes: a fourth transistor, the first terminal of which is connected to a first scan signal line, the second terminal of which is connected to the first terminal of the first transistor, and the third terminal of which is connected to the third terminal of the first transistor.

[0016] In some implementations, the system further includes: a first display switch module, which is connected to a first voltage signal line, a light emission control signal line, and the driving module, respectively. The first display switch module transmits the voltage of the first voltage signal line to the driving module in response to the signal of the light emission control signal line.

[0017] In some implementations, the first display switch module includes a fifth transistor, the first terminal of which is connected to the light emission control signal line, the second terminal of which is connected to the first voltage signal line, and the third terminal of which is connected to the driving module.

[0018] In some implementations, a second display switch module is also included, which is connected to the light emission control signal line, the driving module, and the light emission element respectively. The second display switch module is used to transmit the driving current provided by the driving module to the light emission element in response to the signal of the light emission control signal line.

[0019] In some implementations, the second display switch module includes a sixth transistor, the first terminal of which is connected to the light-emitting control signal line, the second terminal of which is connected to the driving module, and the third terminal of which is connected to the light-emitting element.

[0020] In some implementations, a data writing module is also included, which is connected to the data signal line, the second scan signal line, and the driving module respectively. The data writing module is used to transmit the data voltage signal of the data signal line to the driving module in response to the signal of the second scan signal line.

[0021] In some implementations, the data writing module includes a seventh transistor, the first terminal of which is connected to the second scan signal line, the second terminal of which is connected to the data signal line, and the third terminal of which is connected to the driving module.

[0022] In some implementations, a first reset module is also included, which is connected to the third scan signal line, the second voltage signal line, and the driving module respectively. The first reset module is used to reset the voltage at the first terminal of the transistor in the driving module.

[0023] In some implementations, the first reset module includes: an eighth transistor, the first terminal of which is connected to the third scan signal line, the second terminal of which is connected to the second voltage signal line, and the third terminal of which is connected to the drive module.

[0024] In some implementations, a second reset module is also included, which is connected to the fourth scan signal line, the third voltage signal line, and the light-emitting element respectively. The second reset module is used to reset the anode voltage of the light-emitting element in response to the signal of the fourth scan signal line.

[0025] In some implementations, the second reset module includes: a ninth transistor, the first terminal of which is connected to the fourth scan signal line, the second terminal of which is connected to the third voltage signal line, and the third terminal of which is connected to the anode of the light-emitting element.

[0026] In some implementations, a first energy storage module is also included, which is connected to the driving module and the first voltage signal line respectively. The first energy storage module is used to maintain the voltage at the first terminal of the transistor in the driving module.

[0027] In some implementations, the first energy storage module includes a fourth capacitor, the first end of which is connected to the first voltage signal line, and the second end of which is connected to the first end of the transistor in the driving module.

[0028] In some implementations, a second energy storage module is also included, which is connected to the second scan signal line and the driving module respectively. The second energy storage module is used to compensate the voltage at the first terminal of the transistor in the driving module.

[0029] In some implementations, the second energy storage module includes a fifth capacitor, the first end of which is connected to the second scan signal line, and the second end of which is connected to the drive module.

[0030] In some implementations, an overload bias compensation module is also included, which is connected to the fourth scan signal line, the fourth voltage signal line, and the driving module respectively. The overload bias compensation module is used to provide overload bias compensation to the driving module in response to the signal of the fourth scan signal line.

[0031] In some implementations, the optical black area compensation module includes a tenth transistor, the first terminal of which is connected to the fourth scan signal line, the second terminal of which is connected to the fourth voltage signal line, and the third terminal of which is connected to the driving module.

[0032] According to a second aspect of the present disclosure, a pixel unit is provided, including a pixel circuit as described in the first aspect and a light-emitting element connected to the pixel circuit.

[0033] According to a third aspect of the present disclosure, a pixel array is provided, including a plurality of pixel units as described in the second aspect.

[0034] According to a fourth aspect of the present disclosure, a display panel is provided, including a pixel array as described in the third aspect.

[0035] According to a fifth aspect of the present disclosure, an electronic device is provided, including a display panel as described in the fourth aspect.

[0036] The technical solutions provided by the embodiments of this disclosure may include the following beneficial effects:

[0037] Adding an energy storage unit to the pixel circuit, which is connected between the first and second terminals of the driving transistor, allows the capacity of the energy storage unit to decrease as the operating time increases. This gradually reduces the coupling effect between the first and second terminals of the driving transistor, thereby gradually increasing the display brightness of the light-emitting element. This balances the problem of reduced display brightness caused by the threshold voltage drift of the threshold voltage compensation transistor, ensuring that the display brightness of the light-emitting element does not change with the increase of operating time and improving the stability of the display brightness of the light-emitting element.

[0038] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0039] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0040] Figure 1This is a block diagram illustrating a display panel according to some embodiments of the present disclosure;

[0041] Figure 2 This is a block diagram of a pixel circuit according to some embodiments of the present disclosure;

[0042] Figure 3 This is a pixel circuit circuit shown according to some embodiments of the present disclosure. Figure 1 ;

[0043] Figure 4 This is a pixel circuit circuit shown according to some embodiments of the present disclosure. Figure 2 ;

[0044] Figure 5 This is a pixel circuit circuit shown according to some embodiments of the present disclosure. Figure 3 ;

[0045] Figure 6 This is a pixel circuit circuit shown according to some embodiments of the present disclosure. Figure 4 ;

[0046] Figure 7 This is a pixel circuit circuit shown according to some embodiments of the present disclosure. Figure 5 ;

[0047] Figure 8 This is a pixel circuit circuit shown according to some embodiments of the present disclosure. Figure 6 ;

[0048] Figure 9 This is a pixel circuit circuit shown according to some embodiments of the present disclosure. Figure 7 ;

[0049] Figure 10 This is a pixel circuit circuit shown according to some embodiments of the present disclosure. Figure 8 ;

[0050] Figure 11 This is a pixel circuit circuit shown according to some embodiments of the present disclosure. Figure 9 ;

[0051] Figure 12 This is a pixel circuit circuit shown according to some embodiments of the present disclosure. Figure 10 ;

[0052] Figure 13 This is a pixel circuit circuit shown according to some embodiments of the present disclosure. Figure 10 one;

[0053] Figure 14 This is a pixel circuit circuit shown according to some embodiments of the present disclosure. Figure 10 two;

[0054] Figure 15 This is a block diagram illustrating an electronic device according to some embodiments of the present disclosure. Detailed Implementation

[0055] Some embodiments of this disclosure will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. Various changes, modifications, and equivalents of the methods, apparatus, and / or systems described herein will become apparent upon understanding this disclosure. For example, the order of operations described herein is merely illustrative and is not limited to those orders set forth herein, but can be changed as will become apparent upon understanding this disclosure, except for operations that must be performed in a particular order. Furthermore, for clarity and brevity, descriptions of features known in the art may be omitted.

[0056] The pixel circuits provided in this disclosure can be applied to flexible organic light-emitting diode (OLED) display panels, rigid OLED display panels, LCD display panels, or electronic devices including the aforementioned display panels. For example, they can be applied to low-temperature polycrystalline silicon (LTPS) OLED display panels and low-temperature polycrystalline oxide (LTPO) OLED display panels. See also Figure 1 As shown, the pixel circuit is applied to the display area (AA area) of the display panel.

[0057] To address the issue of threshold voltage drift in pixel circuits caused by the threshold voltage compensation transistor after prolonged operation, which increases with operating time and consequently reduces the display brightness of the light-emitting element, this embodiment proposes adding an energy storage unit to the pixel circuit. The energy storage unit is connected between the first and second terminals of the driving transistor. The capacity of the energy storage unit decreases with operating time, gradually reducing the coupling effect between the first and second terminals of the driving transistor and gradually increasing the display brightness. This balances the reduction in display brightness caused by the threshold voltage drift of the threshold voltage compensation transistor, ensuring that the display brightness of the light-emitting element remains constant with operating time and improving the stability of the display brightness.

[0058] The following description, in conjunction with embodiments, clarifies that the implementations described in some embodiments of this disclosure do not represent all implementations consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0059] Figure 2 This is a schematic diagram of a pixel circuit structure according to some embodiments of the present disclosure, such as... Figure 2 As shown, the pixel circuit includes a driving module 10 and a threshold voltage compensation module 11 connected to the driving module 10.

[0060] The driving module 10 is used to provide driving current to the light-emitting element 20 connected to the pixel circuit. The driving module 10 includes one or more transistors. An energy storage unit 12 is connected between the first and second terminals of at least one transistor in the driving module 10. The capacity of the energy storage unit 12 decreases with the increase of its service life. The threshold voltage compensation module 11 is used to provide threshold voltage compensation for the transistor in the driving module 10. The threshold voltage drift of the threshold voltage compensation module 11 increases with the increase of the operating time.

[0061] In some embodiments, the energy storage unit 12 may include a capacitor, and the capacitor has the characteristic that its capacity decreases with the increase of operating time. For example, the capacitor may be a metal-insulator-semiconductor (MIS) structure capacitor. The negative bias stress (NBS) effect of the MIS capacitor will cause its actual capacitance to gradually decrease with the increase of operating time.

[0062] In some embodiments, the transistors in the driving module 10 and in other modules of the present disclosure embodiments may be thin-film transistors (TFTs) or metal-oxide-semiconductor field-effect transistors (MOS), such as LTPSPTFTs and indium gallium zinc oxide (IGZO) TFTs. The transistors in the driving module 10 and in other modules of the present disclosure embodiments may be N-type or P-type.

[0063] In some embodiments, see Figure 3The driving module 10 includes a first transistor T1, and an energy storage unit 12 connected between the first and second terminals of the first transistor T1 includes a first capacitor C1. A threshold voltage compensation module 11 is connected between the first and third terminals of the first transistor T1. The threshold voltage compensation module 11 includes a fourth transistor T4, the first terminal of which is connected to the first scan signal line Nscan1, the second terminal of which is connected to the first terminal of the first transistor T1, and the third terminal of which is connected to the third terminal of the first transistor T1. When the fourth transistor T4 is turned on under the control of the first scan signal line Nscan1, it provides threshold voltage compensation for the first transistor T1. In one example, the fourth transistor T4 is implemented using a P-type transistor. When the signal of the first scan signal line Nscan1 is a low-level signal, the fourth transistor T4 is turned on. Other transistors in subsequent embodiments of this disclosure can also be implemented using a P-type transistor, that is, the transistor is turned on under the control of a low-level signal, but this does not constitute a limitation on the scheme of this disclosure.

[0064] As the pixel circuit operates for longer, the fourth transistor T4 experiences a threshold voltage drift. This reduces the driving current supplied by the first transistor T1 to the light-emitting element 20, causing the display brightness of the light-emitting element 20 to gradually dim. However, in this embodiment, the capacitance of the first capacitor C1 decreases with increasing operating time, which reduces the coupling effect between the second terminal and the first terminal of the first transistor T1 (i.e., the coupling effect between node A and node Q). This increases the driving current supplied by the first transistor T1 to the light-emitting element 20, causing the display brightness of the light-emitting element 20 to gradually brighten. The effects of these two factors balance and cancel each other out, ensuring that the display brightness of the light-emitting element 20 does not change with increasing operating time, thus improving the stability of the display brightness.

[0065] In some embodiments, see continue to see Figure 2 The pixel circuit also includes a first display switch module 13, which is connected to the first voltage signal line VDD, the light emission control signal line EM, and the driving module 10 respectively. The first display switch module 13 responds to the signal of the light emission control signal line EM and transmits the voltage of the first voltage signal line VDD to the driving module 10.

[0066] The pixel circuit also includes a second display switch module 14, which is connected to the light emission control signal line EM, the driving module 10, and the light emission element 20 respectively. The second display switch module 14 is used to transmit the driving current provided by the driving module 10 to the light emission element 20 in response to the signal of the light emission control signal line EM.

[0067] The pixel circuit also includes a data writing module 15, which is connected to the data signal line Vdata, the second scan signal line Pscan1, and the driving module 10 respectively. The data writing module 15 is used to transmit the data voltage signal of the data signal line Vdata to the driving module 10 in response to the signal of the second scan signal line Pscan1.

[0068] The pixel circuit also includes a first reset module 16, which is connected to the third scan signal line Nscan2, the second voltage signal line Vi_gate, and the driving module 10 respectively. The first reset module 16 is used to reset the voltage at the first terminal of the transistor in the driving module 10.

[0069] The pixel circuit also includes a second reset module 17, which is connected to the fourth scan signal line Pscan2, the third voltage signal line Vi_ano, and the light-emitting element 20 respectively. The second reset module 17 is used to reset the anode voltage of the light-emitting element 20 in response to the signal of the fourth scan signal line Pscan2.

[0070] The pixel circuit also includes a first energy storage module 18, which is connected to the driving module 10 and the first voltage signal line VDD, respectively. The first energy storage module 18 is used to maintain the voltage at the first terminal of the transistor in the driving module 10.

[0071] In some embodiments, see continue to see Figure 3 The first display switch module 13 includes a fifth transistor T5. The first terminal of the fifth transistor T5 is connected to the light emission control signal line EM, the second terminal of the fifth transistor T5 is connected to the first voltage signal line VDD, and the third terminal of the fifth transistor T5 is connected to the drive module 10. The third terminal of the fifth transistor T5 is connected to the second terminal of the first transistor T1.

[0072] The second display switch module 14 includes a sixth transistor T6. The first terminal of the sixth transistor T6 is connected to the light emission control signal line EM, the second terminal of the sixth transistor T6 is connected to the driving module 10, and the third terminal of the sixth transistor T6 is connected to the light emission element 20. The second terminal of the sixth transistor T6 is connected to the third terminal of the first transistor T1, and the third terminal of the sixth transistor T6 is connected to the anode of the OLED.

[0073] The data writing module 15 includes a seventh transistor T7. The first terminal of the seventh transistor T7 is connected to the second scan signal line Pscan1, the second terminal of the seventh transistor T7 is connected to the data signal line Vdata, and the third terminal of the seventh transistor T7 is connected to the driving module 10. The third terminal of the seventh transistor T7 is connected to the second terminal of the first transistor T1.

[0074] The first reset module 16 includes an eighth transistor T8, the first terminal of which is connected to the third scan signal line Nscan2, the second terminal of which is connected to the second voltage signal line Vi_gate, and the third terminal of which is connected to the drive module 10. The third terminal of the eighth transistor T8 is connected to the first terminal of the first transistor T1.

[0075] The second reset module 17 includes a ninth transistor T9. The first terminal of the ninth transistor T9 is connected to the fourth scan signal line, the second terminal of the ninth transistor T9 is connected to the third voltage signal line Vi_ano, and the third terminal of the ninth transistor T9 is connected to the anode of the light-emitting element 20. The third terminal of the ninth transistor T9 is also connected to the anode of the OLED.

[0076] The first energy storage module 18 includes a fourth capacitor C4. The first terminal of the fourth capacitor C4 is connected to the first voltage signal line VDD, and the second terminal of the fourth capacitor C4 is connected to the first terminal of the transistor in the drive module 10. The second terminal of the fourth capacitor C4 is also connected to the first terminal of the first transistor T1.

[0077] See Figure 3 The working principle of the pixel circuit is explained.

[0078] During the initialization phase, the ninth transistor T9 is turned on under the control of the fourth scan signal line Pscan2 to reset the anode of the OLED, which is to reset the voltage of node C; the eighth transistor T8 is turned on under the control of the third scan signal line Nscan2 to reset the gate voltage of the first transistor T1, which is to reset the voltage of node Q.

[0079] During the data writing and threshold voltage compensation phase, the seventh transistor T7 is turned on under the control of the second scan signal line Pscan1, and the fourth transistor T4 is turned on under the control of the first scan signal line Nscan1. The first transistor T1 is coupled to the fourth transistor T4 via a diode. The voltage of the data signal line Vdata charges the first capacitor C1 and the fourth capacitor C4 through the first transistor T1 and the third transistor T3, and the voltage of the data signal line Vdata is written to the first terminal of the first transistor T1. Afterwards, the ninth transistor T9 is turned on under the control of the fourth scan signal line Pscan2 to reset the anode of the OLED. The tenth transistor T10 is turned on under the control of the fourth scan signal line Pscan2 to pull up the voltage at node A.

[0080] During the light-emitting stage, the fifth transistor T5 and the sixth transistor T6 are turned on under the control of the light-emitting control signal EM, and the first voltage signal line VDD is provided to the first transistor T1. The first transistor T1 generates a driving current that flows to the OLED, driving the OLED to emit light and display.

[0081] In the pixel circuit described above, during the light-emitting stage, the coupling effect of node A to node Q pulls up the voltage of node Q. However, as the working time increases, the coupling effect of node A to node Q gradually decreases, and the pull-up of the voltage of node A to node Q gradually decreases, causing the display brightness of the OLED to gradually brighten. This balances the problem of the display brightness gradually dimming caused by the threshold voltage drift of the fourth transistor T4, thus keeping the display brightness of the OLED stable.

[0082] In some embodiments, refer to Figure 4 As shown, in Figure 3 Based on this, the driving module 10 includes a second transistor T2 in addition to the first transistor T1. The energy storage unit 12 connected between the first and second ends of the second transistor T2 includes a second capacitor C2. The first end of the second transistor T2 is connected to the first end of the first transistor T1, the third end of the second transistor T2 is connected to the second end of the first transistor T1, the second end of the second transistor T2 is connected to the third end of the fifth transistor T5, and the third end of the seventh transistor T7 is connected to the second end of the second transistor T2.

[0083] During the initialization phase, the eighth transistor T8 is turned on under the control of the third scan signal line Nscan2, resetting the voltage at the first terminal of the first transistor T1 and the first terminal of the second transistor T2, which is equivalent to resetting the voltage at node Q. During the data writing and threshold voltage compensation phase, the voltage on the data signal line Vdata charges the first capacitor C1, the second capacitor C2, and the fourth capacitor C4. During the light-emitting phase, the fifth transistor T5 and the sixth transistor T6 are turned on under the control of the light-emitting control signal EM, providing the first voltage signal line VDD to the first transistor T1 and the second transistor T2. The first transistor T1 and the second transistor T2 generate a driving current that flows to the OLED, driving the OLED to emit light for display. The operating principles of other devices are similar. Figure 3 Similar to the Chinese.

[0084] In some embodiments, refer to Figure 5 As shown, in Figure 4 Based on this, the driving module 10 includes a first transistor T1 and a second transistor T2, as well as a third transistor T3. The energy storage unit 12 connected between the first and second ends of the third transistor T3 includes a third capacitor C3. The first end of the third transistor T3 is connected to the first end of the first transistor T1, the third end of the third transistor T3 is connected to the second end of the second transistor T2, the second end of the third transistor T3 is connected to the third end of the fifth transistor T5, and the third end of the seventh transistor T7 is connected to the second end of the third transistor T3.

[0085] During the initialization phase, the eighth transistor T8 is turned on under the control of the third scan signal line Nscan2, resetting the voltages at the first terminals of the first transistor T1, the second transistor T2, and the third transistor T3, which in turn resets the voltage at node Q. During the data writing and threshold voltage compensation phase, the voltage on the data signal line Vdata charges the first capacitor C1, the second capacitor C2, the third capacitor C3, and the fourth capacitor C4. During the light-emitting phase, the fifth transistor T5 and the sixth transistor T6 are turned on under the control of the light-emitting control signal EM, providing the first voltage signal line VDD to the first transistor T1, the second transistor T2, and the third transistor T3. The first transistor T1, the second transistor T2, and the third transistor T3 generate a driving current that flows to the OLED, driving the OLED to emit light for display. The working principles of other devices are similar. Figure 3 Similar to the Chinese.

[0086] It should be noted that, Figure 3 , Figure 4 and Figure 5 The illustrations show the cases where the number of driving transistors in the driving module 10 is one, two, and three, respectively. However, this does not constitute a limitation on the number of driving transistors, and the number of driving transistors in this embodiment is not limited.

[0087] In some embodiments, an energy storage unit 12 is connected between the first and second terminals of some transistors in the driving circuit 10, as shown in the reference. Figure 6 As shown, a first capacitor C1 is connected between the first terminal and the second terminal of the first transistor T1, and a third capacitor C3 is connected between the first terminal and the second terminal of the third transistor T3.

[0088] During the data writing and threshold voltage compensation phases, the voltage on the data signal line Vdata charges the first capacitor C1, the third capacitor C3, and the fourth capacitor C4. The operating principles of other components are similar. Figure 5 Similar to the Chinese.

[0089] In some embodiments, see continue to see Figure 2 The pixel circuit also includes a second energy storage module 19, which is connected to the second scan signal line Pscan1 and the driving module 10 respectively. The second energy storage module 19 is used to compensate the voltage at the first end of the transistor in the driving module 10.

[0090] In some embodiments, see Figure 7 The second energy storage module 19 includes a fifth capacitor C5. The first terminal of the fifth capacitor C5 is connected to the second scan signal line Pscan1, and the second terminal of the fifth capacitor C5 is connected to the drive module 10. The second terminal of the fifth capacitor C5 is also connected to the first terminal of the first transistor T1.

[0091] See Figure 7 The working principle of the pixel circuit is explained.

[0092] During the initialization phase, the ninth transistor T9 is turned on under the control of the fourth scan signal line Pscan2 to reset the anode of the OLED, which is to reset the voltage of node C; the eighth transistor T8 is turned on under the control of the third scan signal line Nscan2 to reset the gate voltage of the first transistor T1, which is to reset the voltage of node Q.

[0093] During the data writing and threshold voltage compensation phase, the seventh transistor T7 is turned on under the control of the second scan signal line Pscan1, and the fourth transistor T4 is turned on under the control of the first scan signal line Nscan1. The first transistor T1 is coupled to the fourth transistor T4 via a diode. The voltage of the data signal line Vdata charges the first capacitor C1, the fourth capacitor C4, and the fifth capacitor C5 through the first terminal of the first transistor T1 and the third transistor T3. The voltage of the data signal line Vdata is written to the first terminal of the first transistor T1. Subsequently, the ninth transistor T9 is turned on under the control of the fourth scan signal line Pscan2 to reset the anode of the OLED.

[0094] The tenth transistor T10 is turned on under the control of the fourth scan signal line Pscan2, pulling up the voltage of node A.

[0095] During the light-emitting stage, the fifth transistor M5 and the sixth transistor M6 are turned on under the control of the light-emitting control signal EM, providing the first voltage signal line VDD to the first transistor T1. The first transistor T1 generates a driving current that flows to the OLED, driving the OLED to emit light and display.

[0096] In the pixel circuit described above, during the light-emitting stage, the coupling effect of node A to node Q pulls up the voltage of node Q. However, as the working time increases, the coupling effect of node A to node Q gradually decreases, and the pull-up of the voltage of node A to node Q gradually decreases, causing the display brightness of the OLED to gradually brighten. This balances the problem of the display brightness gradually dimming caused by the threshold voltage drift of the fourth transistor T4, thus keeping the display brightness of the OLED stable.

[0097] In some embodiments, refer to Figure 8 As shown, in Figure 7Based on this, the driving module 10 includes a second transistor T2 in addition to the first transistor T1. The energy storage unit 12 connected between the first and second ends of the second transistor T2 includes a second capacitor C2. The first end of the second transistor T2 is connected to the first end of the first transistor T1, the third end of the second transistor T2 is connected to the second end of the first transistor T1, the second end of the second transistor T2 is connected to the third end of the fifth transistor T5, and the third end of the seventh transistor T7 is connected to the second end of the second transistor T2.

[0098] During the initialization phase, the eighth transistor T8 is turned on under the control of the third scan signal line Nscan2, resetting the voltage at the first terminal of the first transistor T1 and the first terminal of the second transistor T2, which in turn resets the voltage at node Q. During the data writing and threshold voltage compensation phase, the voltage on the data signal line Vdata charges the first capacitor C1, the second capacitor C2, the fourth capacitor C4, and the fifth capacitor C5. During the light-emitting phase, the fifth transistor T5 and the sixth transistor T6 are turned on under the control of the light-emitting control signal EM, providing the first voltage signal line VDD to the first transistor T1 and the second transistor T2. The first transistor T1 and the second transistor T2 generate a driving current that flows to the OLED, driving the OLED to emit light for display. The working principles of other devices are similar. Figure 7 Similar to the Chinese.

[0099] In some embodiments, refer to Figure 9 As shown, in Figure 8 Based on this, the driving module 10 includes a first transistor T1 and a second transistor T2, as well as a third transistor T3. The energy storage unit 12 connected between the first and second ends of the third transistor T3 includes a third capacitor C3. The first end of the third transistor T3 is connected to the first end of the first transistor T1, the third end of the third transistor T3 is connected to the second end of the second transistor T2, the second end of the third transistor T3 is connected to the third end of the fifth transistor T5, and the third end of the seventh transistor T7 is connected to the second end of the third transistor T3.

[0100] During the initialization phase, the eighth transistor T8 is turned on under the control of the third scan signal line Nscan2, resetting the voltages at the first terminals of the first transistor T1, the second transistor T2, and the third transistor T3, which in turn resets the voltage at node Q. During the data writing and threshold voltage compensation phase, the voltage on the data signal line Vdata charges the first capacitor C1, the second capacitor C2, the third capacitor C3, the fourth capacitor C4, and the fifth capacitor C5. During the light-emitting phase, the fifth transistor T5 and the sixth transistor T6 are turned on under the control of the light-emitting control signal EM, providing the first voltage signal line VDD to the first transistor T1, the second transistor T2, and the third transistor T3. The first transistor T1, the second transistor T2, and the third transistor T3 generate a driving current that flows to the OLED, driving the OLED to emit light for display. The working principles of other devices are similar. Figure 7 Similar to the Chinese.

[0101] In some embodiments, an energy storage unit 12 is connected between the first and second terminals of some transistors in the driving circuit 10, as shown in the reference. Figure 10 As shown, a first capacitor C1 is connected between the first terminal and the second terminal of the first transistor T1, and a third capacitor C3 is connected between the first terminal and the second terminal of the third transistor T3.

[0102] During the data writing and threshold voltage compensation phases, the voltage on the data signal line Vdata charges the first capacitor C1, the third capacitor C3, and the fourth capacitor C4. The operating principles of other components are similar. Figure 9 Similar to the Chinese.

[0103] In some embodiments, see continue to see Figure 2 The pixel circuit also includes an overload bias compensation module 30, which is connected to the fourth scan signal line Pscan2, the fourth voltage signal line Vi3, and the drive module 10, respectively. The overload bias compensation module 30 is used to provide overload bias compensation to the drive module 10 in response to the signal from the fourth scan signal line Pscan2. The signal connected to the fourth voltage signal line Vi3 can be an overload bias signal (OBS).

[0104] In some embodiments, see Figure 11 The overload bias compensation module 30 includes a tenth transistor T10. The first terminal of the tenth transistor T10 is connected to the fourth scan signal line Pscan2, the second terminal of the tenth transistor T10 is connected to the fourth voltage signal line Vi3, and the third terminal of the tenth transistor T10 is connected to the drive module 10. The third terminal of the tenth transistor T10 is connected to the second terminal of the first transistor T1.

[0105] See Figure 11 The working principle of the pixel circuit is explained.

[0106] During the initialization phase, the ninth transistor T9 is turned on under the control of the fourth scan signal line Pscan2 to reset the anode of the OLED, that is, to reset the voltage of node C; the tenth transistor T10 is turned on under the control of the fourth scan signal line Pscan2 to reset the voltage of node A; and the eighth transistor T8 is turned on under the control of the third scan signal line Nscan2 to reset the gate voltage of the first transistor T1, that is, to reset the voltage of node Q.

[0107] During the data writing and threshold voltage compensation phase, the seventh transistor T7 is turned on under the control of the second scan signal line Pscan1, and the fourth transistor T4 is turned on under the control of the first scan signal line Nscan1. The first transistor T1 is coupled to the fourth transistor T4 via a diode. The voltage of the data signal line Vdata charges the first capacitor C1, the fourth capacitor C4, and the fifth capacitor C5 through the first terminal of the first transistor T1 and the third transistor T3. The voltage of the data signal line Vdata is written to the first terminal of the first transistor T1. Subsequently, the ninth transistor T9 is turned on under the control of the fourth scan signal line Pscan2 to reset the anode of the OLED.

[0108] The tenth transistor T10 is turned on under the control of the fourth scan signal line Pscan2, pulling up the voltage of node A.

[0109] During the light-emitting stage, the fifth transistor M5 and the sixth transistor M6 are turned on under the control of the light-emitting control signal EM, providing the first voltage signal line VDD to the first transistor T1. The first transistor T1 generates a driving current that flows to the OLED, driving the OLED to emit light and display.

[0110] In the pixel circuit described above, during the light-emitting stage, the coupling effect of node A to node Q pulls up the voltage of node Q. However, as the working time increases, the coupling effect of node A to node Q gradually decreases, and the pull-up of the voltage of node A to node Q gradually decreases, causing the display brightness of the OLED to gradually brighten. This balances the problem of the display brightness gradually dimming caused by the threshold voltage drift of the fourth transistor T4, thus keeping the display brightness of the OLED stable.

[0111] In some embodiments, refer to Figure 12 As shown, in Figure 11Based on this, the driving module 10 includes a second transistor T2 in addition to the first transistor T1. The energy storage unit 12 connected between the first and second ends of the second transistor T2 includes a second capacitor C2. The first end of the second transistor T2 is connected to the first end of the first transistor T1, the third end of the second transistor T2 is connected to the second end of the first transistor T1, the second end of the second transistor T2 is connected to the third end of the fifth transistor T5, and the third end of the seventh transistor T7 is connected to the second end of the second transistor T2.

[0112] During the initialization phase, the eighth transistor T8 is turned on under the control of the third scan signal line Nscan2, resetting the voltage at the first terminal of the first transistor T1 and the first terminal of the second transistor T2, which in turn resets the voltage at node Q. During the data writing and threshold voltage compensation phase, the voltage on the data signal line Vdata charges the first capacitor C1, the second capacitor C2, the fourth capacitor C4, and the fifth capacitor C5. During the light-emitting phase, the fifth transistor T5 and the sixth transistor T6 are turned on under the control of the light-emitting control signal EM, providing the first voltage signal line VDD to the first transistor T1 and the second transistor T2. The first transistor T1 and the second transistor T2 generate a driving current that flows to the OLED, driving the OLED to emit light for display. The working principles of other devices are similar. Figure 11 Similar to the Chinese.

[0113] In some embodiments, refer to Figure 13 As shown, in Figure 12 Based on this, the driving module 10 includes a first transistor T1 and a second transistor T2, as well as a third transistor T3. The energy storage unit 12 connected between the first and second ends of the third transistor T3 includes a third capacitor C3. The first end of the third transistor T3 is connected to the first end of the first transistor T1, the third end of the third transistor T3 is connected to the second end of the second transistor T2, the second end of the third transistor T3 is connected to the third end of the fifth transistor T5, and the third end of the seventh transistor T7 is connected to the second end of the third transistor T3.

[0114] During the initialization phase, the eighth transistor T8 is turned on under the control of the third scan signal line Nscan2, resetting the voltages at the first terminals of the first transistor T1, the second transistor T2, and the third transistor T3, which in turn resets the voltage at node Q. During the data writing and threshold voltage compensation phase, the voltage on the data signal line Vdata charges the first capacitor C1, the second capacitor C2, the third capacitor C3, the fourth capacitor C4, and the fifth capacitor C5. During the light-emitting phase, the fifth transistor T5 and the sixth transistor T6 are turned on under the control of the light-emitting control signal EM, providing the first voltage signal line VDD to the first transistor T1, the second transistor T2, and the third transistor T3. The first transistor T1, the second transistor T2, and the third transistor T3 generate a driving current that flows to the OLED, driving the OLED to emit light for display. The working principles of other devices are similar. Figure 11 Similar to the Chinese.

[0115] In some embodiments, an energy storage unit 12 is connected between the first and second terminals of some transistors in the driving circuit 10, as shown in the reference. Figure 14 As shown, a first capacitor C1 is connected between the first terminal and the second terminal of the first transistor T1, and a third capacitor C3 is connected between the first terminal and the second terminal of the third transistor T3.

[0116] During the data writing and threshold voltage compensation phases, the voltage on the data signal line Vdata charges the first capacitor C1, the third capacitor C3, and the fourth capacitor C4. The operating principles of other components are similar. Figure 13 Similar to the Chinese.

[0117] This disclosure also provides a pixel unit, including the pixel circuit of any of the above embodiments and a light-emitting element connected to the pixel circuit.

[0118] This disclosure also provides a pixel array including a plurality of the above-described pixel units.

[0119] This disclosure also provides a display panel including the pixel array described above.

[0120] This disclosure also provides an electronic device, including the display panel described above.

[0121] Figure 15 This is a block diagram illustrating an electronic device 1500 according to some embodiments of the present disclosure. For example, the electronic device 1500 may be a mobile phone, computer, digital broadcasting terminal, messaging device, game console, tablet device, medical device, fitness equipment, personal digital assistant, etc.

[0122] Reference Figure 15The electronic device 1500 may include one or more of the following components: a processing component 1502, a memory 1504, a power component 1506, a multimedia component 1508, an audio component 1510, an input / output (I / O) interface 1512, a sensor component 1514, and a communication component 1516.

[0123] Processing component 1502 typically controls the overall operation of electronic device 1500, such as operations associated with display, telephone calls, data communication, camera operation, and recording operations. Processing component 1502 may include one or more processors 1520 to execute instructions to perform all or part of the steps of the methods described above. Furthermore, processing component 1502 may include one or more modules to facilitate interaction between processing component 1502 and other components. For example, processing component 1502 may include a multimedia module to facilitate interaction between multimedia component 1508 and processing component 1502.

[0124] Memory 1504 is configured to store various types of data to support the operation of device 1500. Examples of this data include instructions for any application or method operating on electronic device 1500, contact data, phonebook data, messages, pictures, videos, etc. Memory 1504 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk.

[0125] Power component 1506 provides power to various components of electronic device 1500. Power component 1506 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to electronic device 1500.

[0126] Multimedia component 1508 includes a screen that provides an output interface between the electronic device 1500 and the user. In some embodiments, the screen may include an OLED display panel, a liquid crystal display (LCD), or a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touchscreen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensors may sense not only the boundaries of the touch or swipe action but also the duration and pressure associated with the touch or swipe operation. In some embodiments, multimedia component 1508 includes a front-facing camera and / or a rear-facing camera. When the device 1500 is in an operating mode, such as a shooting mode or a video mode, the front-facing camera and / or the rear-facing camera may receive external multimedia data. Each front-facing camera and rear-facing camera may be a fixed optical lens system or have focal length and optical zoom capabilities.

[0127] Audio component 1510 is configured to output and / or input audio signals. For example, audio component 1510 includes a microphone (MIC) configured to receive external audio signals when electronic device 1500 is in an operating mode, such as call mode, recording mode, and voice recognition mode. The received audio signals may be further stored in memory 1504 or transmitted via communication component 1516. In some embodiments, audio component 1510 also includes a speaker for outputting audio signals.

[0128] I / O interface 1512 provides an interface between processing component 1502 and peripheral interface modules, such as keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to, home buttons, volume buttons, power buttons, and lock buttons.

[0129] Sensor assembly 1514 includes one or more sensors for providing state assessments of various aspects of electronic device 1500. For example, sensor assembly 1514 may detect the on / off state of device 1500, the relative positioning of components such as the display and keypad of electronic device 1500, changes in position of electronic device 1500 or a component of electronic device 1500, the presence or absence of user contact with electronic device 1500, orientation or acceleration / deceleration of electronic device 1500, and temperature changes of electronic device 1500. Sensor assembly 1514 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. Sensor assembly 1514 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, sensor assembly 1514 may also include an accelerometer, gyroscope, magnetometer, pressure sensor, or temperature sensor.

[0130] Communication component 1516 is configured to facilitate wired or wireless communication between electronic device 1500 and other devices. Electronic device 1500 can access wireless networks based on communication standards, such as WiFi, 3G, 4G, 5G, other communication standards, or combinations thereof. In some embodiments of this disclosure, communication component 1516 receives broadcast signals or broadcast-related information from an external broadcast management system via a broadcast channel. In some embodiments of this disclosure, communication component 1516 further includes a near-field communication (NFC) module to facilitate short-range communication. For example, the NFC module may be implemented based on radio frequency identification (RFID) technology, Infrared Data Association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

[0131] In some embodiments of this disclosure, the electronic device 1500 may include one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field-programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components.

[0132] Those skilled in the art will also understand that the various illustrative logical blocks and steps listed in the embodiments of this application can be implemented by electronic hardware, computer software, or a combination of both. Whether such functionality is implemented through hardware or software depends on the specific application and the overall system design requirements. Those skilled in the art can implement the described functionality using various methods for each specific application, but such implementation should not be construed as exceeding the scope of protection of the embodiments of this application.

[0133] In the above detailed description, reference has been made to the accompanying drawings, which illustrate specific aspects of this disclosure by way of illustration. In this regard, terms indicating direction or positional relationship, such as “center,” “longitudinal,” “lateral,” “length,” “width,” “thickness,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” “outer,” “clockwise,” “counterclockwise,” “axial,” “radial,” and “circumferential,” are used with reference to the orientation of the described figures. Since components of the described device can be positioned in multiple different orientations, directional terms are used for illustrative purposes and not for limitation. It should be understood that other aspects can be utilized and structural or logical changes can be made without departing from the concept of this disclosure. Therefore, the following detailed description should not be considered limiting.

[0134] It should be understood that, unless otherwise specifically indicated, features of various embodiments of this disclosure described herein can be combined with each other. As used herein, the term “and / or” includes any one of the relevant listed items and any combination of any two or more; similarly, “at least one of…” includes any one of the relevant listed items and any combination of any two or more.

[0135] It should be understood that, unless otherwise expressly specified and limited, the terms "joining," "attaching," "installing," "connecting," "linking," "fixing," etc., used in the embodiments of this disclosure should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms herein based on the specific circumstances.

[0136] Furthermore, the term "above" as used herein with respect to components, elements, or material layers formed or located "above" a surface may be used to indicate that the component, element, or material layer is "indirectly" positioned (e.g., placed, formed, deposited, etc.) on the surface such that one or more additional components, elements, or layers are arranged between the surface and the component, element, or material layer. However, the term "above" as used with respect to components, elements, or material layers formed or located "above" a surface may also optionally have a specific meaning: that the component, element, or material layer is "directly" positioned (e.g., placed, formed, deposited, etc.) on the surface, for example, in direct contact with the surface.

[0137] Although terms such as “first,” “second,” and “third” may be used herein to describe various components, parts, regions, layers, or sections, these components, parts, regions, layers, or sections are not limited to these terms. Rather, these terms are used only to distinguish one component, part, region, layer, or section from another. Therefore, without departing from the teachings of the examples described herein, the first component, part, region, layer, or section mentioned in the examples may also be referred to as the second component, part, region, layer, or section. Furthermore, the terms “first” and “second” are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as “first” or “second” may explicitly or implicitly include at least one of that feature. In the description herein, “a plurality” means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0138] It should be understood that spatial relative terms, such as “above,” “upper,” “below,” and “lower,” are used herein to describe the relationship between one element and another shown in the figures. In addition to the orientation depicted in the figures, these spatial relative terms are also intended to encompass different orientations of the device in use or operation. For example, if the device in the figures is flipped, an element described as “above” or “upper” relative to another element would be “below” or “lower” relative to that other element. Thus, depending on the spatial orientation of the device, the term “above” encompasses both above and below orientations. Devices may have other orientations (e.g., rotated 90 degrees or in other orientations), and the spatial relative terms used herein should be interpreted accordingly.

[0139] Furthermore, the term “exemplary” is used herein to mean serving as an example, instance, or illustration. Any aspect or design described herein as “exemplary” is not necessarily to be construed as advantageous compared to other aspects or designs. Rather, the use of the term “exemplary” is intended to present the concept in a concrete manner. As used herein, the term “or” is intended to mean an inclusive “or” rather than an exclusive “or.” That is, unless otherwise specified or clear from the context, “X applies A or B” is intended to mean any of the natural inclusive arrangements. That is, “X applies A or B” satisfies any of the foregoing instances if X applies A; X applies B; or both X applies A and B. Additionally, unless otherwise specified or clear from the context to refer to the singular form, the articles “a” and “an” as used in this application and the appended claims are generally understood to mean “one or more.”

[0140] Similarly, although this disclosure has been shown and described with respect to one or more implementations, equivalent variations and modifications will occur to those skilled in the art upon reading and understanding the specification and drawings. This disclosure includes all such modifications and variations and is limited only by the scope of the claims. In particular, with respect to the various functions performed by the components described above (e.g., elements, resources, etc.), unless otherwise indicated, the terminology used to describe such components is intended to correspond to any component (functionally equivalent) that performs the specific function of the described component, even if structurally not equivalent to the disclosed structure. Furthermore, although specific features of this disclosure may have been disclosed with respect to only one of several implementations, such features may be combined with one or more other features of other implementations, as may be desired and advantageous to any given or particular application. Moreover, with regard to the terms “comprising,” “owning,” “having,” “having,” or variations thereof as used in the detailed description or claims, such terms are intended to be inclusive in a manner similar to the term “including.”

[0141] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the utility models disclosed herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the following claims.

[0142] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. A pixel circuit, characterized in that, include: The driving module and the threshold voltage compensation module connected to the driving module; The driving module is used to provide driving current to the light-emitting element connected to the pixel circuit. The driving module includes one or more transistors. An energy storage unit is connected between the first and second terminals of at least one transistor in the driving module. The capacity of the energy storage unit decreases as the working time increases. The threshold voltage compensation module is used to provide threshold voltage compensation for the transistors in the drive module. The threshold voltage drift of the threshold voltage compensation module increases with the increase of the operating time.

2. The pixel circuit of claim 1, wherein, The energy storage unit includes a capacitor with a metal-insulator-semiconductor structure.

3. The pixel circuit according to claim 1 or 2, characterized in that, The driving module includes a first transistor, and the energy storage unit connected between the first terminal and the second terminal of the first transistor includes a first capacitor. The threshold voltage compensation module is connected between the first and third terminals of the first transistor.

4. The pixel circuit of claim 3, wherein, The driving module includes a second transistor, and the energy storage unit connected between the first and second terminals of the second transistor includes a second capacitor. The first terminal of the second transistor is connected to the first terminal of the first transistor, and the third terminal of the second transistor is connected to the second terminal of the first transistor.

5. The pixel circuit of claim 4, wherein, The driving module includes a third transistor, and the energy storage unit connected between the first and second terminals of the third transistor includes a third capacitor. The first terminal of the third transistor is connected to the first terminal of the first transistor, and the third terminal of the third transistor is connected to the second terminal of the second transistor.

6. The pixel circuit of claim 3, wherein, The threshold voltage compensation module includes: a fourth transistor, the first terminal of which is connected to a first scan signal line, the second terminal of which is connected to the first terminal of the first transistor, and the third terminal of which is connected to the third terminal of the first transistor.

7. The pixel circuit according to claim 1 or 2, characterized in that, Also includes: A first display switch module is connected to a first voltage signal line, a light emission control signal line, and the driving module, respectively. The first display switch module responds to the signal of the light emission control signal line by transmitting the voltage of the first voltage signal line to the driving module.

8. The pixel circuit of claim 7, wherein, The first display switch module includes a fifth transistor, the first terminal of which is connected to the light emission control signal line, the second terminal of which is connected to the first voltage signal line, and the third terminal of which is connected to the driving module.

9. The pixel circuit according to claim 1 or 2, characterized in that, Also includes: The second display switch module is connected to the light emission control signal line, the driving module, and the light emission element respectively. The second display switch module is used to transmit the driving current provided by the driving module to the light emission element in response to the signal of the light emission control signal line.

10. The pixel circuit of claim 9, wherein, The second display switch module includes a sixth transistor, the first terminal of which is connected to the light emission control signal line, the second terminal of which is connected to the driving module, and the third terminal of which is connected to the light emission element.

11. The pixel circuit according to claim 1 or 2, characterized in that, Also includes: The data writing module is connected to the data signal line, the second scan signal line, and the driving module respectively. The data writing module is used to transmit the data voltage signal of the data signal line to the driving module in response to the signal of the second scan signal line.

12. The pixel circuit of claim 11, wherein, The data writing module includes a seventh transistor, the first terminal of which is connected to the second scan signal line, the second terminal of which is connected to the data signal line, and the third terminal of which is connected to the driving module.

13. The pixel circuit of claim 1 or 2, wherein, Also includes: A first reset module is connected to a third scan signal line, a second voltage signal line, and the driving module, respectively. The first reset module is used to reset the voltage at the first terminal of the transistor in the driving module.

14. The pixel circuit of claim 13, wherein, The first reset module includes an eighth transistor, the first terminal of which is connected to the third scan signal line, the second terminal of which is connected to the second voltage signal line, and the third terminal of which is connected to the drive module.

15. The pixel circuit of claim 1 or 2, wherein, Also includes: The second reset module is connected to the fourth scan signal line, the third voltage signal line, and the light-emitting element, respectively. The second reset module is used to reset the anode voltage of the light-emitting element in response to the signal of the fourth scan signal line.

16. The pixel circuit of claim 15, wherein, The second reset module includes: a ninth transistor, the first terminal of which is connected to the fourth scan signal line, the second terminal of which is connected to the third voltage signal line, and the third terminal of which is connected to the anode of the light-emitting element.

17. The pixel circuit of claim 1 or 2, wherein, Also includes: A first energy storage module is connected to the driving module and a first voltage signal line, respectively. The first energy storage module is used to maintain the voltage at the first terminal of the transistor in the driving module.

18. The pixel circuit of claim 17, wherein, The first energy storage module includes a fourth capacitor, the first end of which is connected to the first voltage signal line, and the second end of which is connected to the first end of the transistor in the driving module.

19. The pixel circuit of claim 1 or 2, wherein, Also includes: The second energy storage module is connected to the second scan signal line and the driving module respectively. The second energy storage module is used to compensate the voltage at the first terminal of the transistor in the driving module.

20. The pixel circuit of claim 19, wherein, The second energy storage module includes a fifth capacitor, the first end of which is connected to the second scan signal line, and the second end of which is connected to the drive module.

21. The pixel circuit of claim 1 or 2, wherein, Also includes: An overload bias compensation module is provided, which is connected to the fourth scan signal line, the fourth voltage signal line, and the driving module respectively. The overload bias compensation module is used to provide overload bias compensation to the driving module in response to the signal of the fourth scan signal line.

22. The pixel circuit of claim 21, wherein, The overload bias compensation module includes a tenth transistor, the first terminal of which is connected to the fourth scan signal line, the second terminal of which is connected to the fourth voltage signal line, and the third terminal of which is connected to the drive module.

23. A pixel cell, comprising: It includes the pixel circuit as described in any one of claims 1-22 and the light-emitting element connected to the pixel circuit.

24. A pixel array, comprising: It includes multiple pixel units as described in claim 23.

25. A display panel comprising: Includes the pixel array as described in claim 24.

26. An electronic device, comprising: Includes the display panel as described in claim 25.

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