Pixel circuit, driving method and display device

Abstract

The application relates to the technical field of display, and particularly discloses a pixel circuit, a driving method and a display device, which comprise a first light-emitting unit, a second light-emitting unit, a first driving circuit configured to generate a driving current for driving the first light-emitting unit, a second driving circuit configured to generate a driving current for driving the second light-emitting unit, a first power supply line configured to provide a first power supply signal to the first driving circuit and the second light-emitting unit respectively, and a second power supply line configured to provide a second power supply signal to the second driving circuit and the first light-emitting unit respectively; in a light-emitting stage of the pixel circuit, the first power supply signal and the second power supply signal are configured to have high-low jumps in voltage with time, and the first light-emitting unit and the second light-emitting unit alternately emit light. The pixel circuit can reduce the hysteresis effect and prolong the service life of the light-emitting device.

Description

TECHNICAL FIELD

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

[0002] With the development of electronic technology, smart phones are widely used by people, and have become an essential tool for people's daily communication, entertainment and learning. However, along with this, people's requirements for display panels are getting higher and higher, especially the display quality is always an important measure for consumers and manufacturers to measure product quality. At present, the display panel is mostly AMOLED (Active-matrix organic light-emitting diode), although the LTPS (Low Temperature Poly-Silicon) preparation technology is relatively mature, but there is still a certain degree of hysteresis effect when working, which leads to the problem of residual image when OLED (Organic Light-Emitting Diode) displays, thereby affecting the visual display of the display panel. SUMMARY

[0003] Therefore, it is necessary to provide a pixel circuit, a driving method and a display device for the problem of hysteresis effect of the thin film transistor (Thin Film Transistor, TFT) when working, which leads to residual image.

[0004] A pixel circuit includes a first light emitting unit, a second light emitting unit, a first driving circuit and a second driving circuit which is centrally symmetrical with the first driving circuit, the first driving circuit is electrically connected with a first electrode of the first light emitting unit and is configured to generate a driving current for driving the first light emitting unit to emit light, the second driving circuit is electrically connected with a first electrode of the second light emitting unit and is configured to generate a driving current for driving the second light emitting unit to emit light, a power input end of the first driving circuit and a second electrode of the second light emitting unit are connected with a first power line respectively, a power input end of the second driving circuit and a second electrode of the first light emitting unit are connected with a second power line respectively, the first power line is used for providing a first power supply signal to the first driving circuit and the second light emitting unit respectively, and the second power line is used for providing a second power supply signal to the second driving circuit and the first light emitting unit respectively, the pixel circuit includes a light emitting stage in a working process of one display frame, in the light emitting stage, the first power supply signal and the second power supply signal are configured to jump high and low with time, and the first light emitting unit and the second light emitting unit emit light alternately in the light emitting stage.

[0005] In one of the embodiments, the first driving circuit and the second driving circuit each include a data writing unit, a storage unit and a driving unit, the data writing unit is connected to the control end of the driving unit, and the data writing unit is configured to write a data signal to the control end of the driving unit according to a first scan signal; the storage unit is used to store the voltage at the control end of the driving unit; the driving unit in the first driving circuit is connected between the power input end of the first driving circuit and the first electrode of the first light emitting unit, and the driving unit in the second driving circuit is connected between the power input end of the second driving circuit and the first electrode of the second light emitting unit; the driving unit is configured to generate a driving current according to the voltage at the control end of the driving unit.

[0006] In one of the embodiments, optionally, the control end of the data writing unit in the first driving circuit and the control end of the data writing unit in the second driving circuit are connected to the same first scan line.

[0007] In one of the embodiments, optionally, the data writing unit in the first driving circuit and the data writing unit in the second driving circuit are connected to the same data line.

[0008] In one of the embodiments, the driving unit includes a first transistor, the first electrode of the first transistor serves as the first end of the driving unit, the gate of the first transistor serves as the control end of the driving unit, and the second electrode of the first transistor serves as the second end of the driving unit; the data writing unit includes a second transistor, the first electrode of the second transistor is connected to the control end of the driving unit, the gate of the second transistor is connected to the first scan line, and the second electrode of the second transistor is connected to the data line; the storage unit includes a storage capacitor, the first end of the storage capacitor in the first driving circuit is connected to the first power line, the first end of the storage capacitor in the second driving circuit is connected to the second power line, the second end of the storage capacitor in the first driving circuit is connected to the control end of the driving unit, and the second end of the storage capacitor in the second driving circuit is connected to the control end of the driving unit.

[0009] In one of the embodiments, the first driving circuit and the second driving circuit each include a data writing unit, a storage unit, a driving unit and a compensation unit, the data writing unit is connected to the first end of the driving unit, and the data writing unit is configured to write a data signal to the first end of the driving unit according to a first scan signal; the storage unit is used to store the voltage at the control end of the driving unit; the driving unit in the first driving circuit is connected between the power input end of the first driving circuit and the first electrode of the first light emitting unit, and the driving unit in the second driving circuit is connected between the power input end of the second driving circuit and the first electrode of the second light emitting unit; the driving unit is configured to generate a driving current according to the voltage at the control end of the driving unit; the compensation unit is connected between the control end of the driving unit and the second end of the driving unit, and the compensation unit is configured to perform threshold compensation on the driving unit according to the first scan signal.

[0010] In one of the embodiments, optionally, the control end of the data writing unit in the first driving circuit and the control end of the data writing unit in the second driving circuit are connected to the same first scan line.

[0011] In one of the embodiments, optionally, the data writing unit in the first driving circuit and the data writing unit in the second driving circuit are connected to the same data line.

[0012] In one of the embodiments, optionally, the control end of the compensation unit in the first driving circuit and the control end of the compensation unit in the second driving circuit are connected to the same first scan line.

[0013] In one of the embodiments, the first driving circuit and the second driving circuit further comprise a first initialization unit and / or a second initialization unit, the first initialization unit in the first driving circuit is connected to the first electrode of the first light emitting unit, the first initialization unit in the second driving circuit is connected to the first electrode of the second light emitting unit, the first initialization unit is configured to transmit an initialization signal to the light emitting unit connected thereto according to a second scan signal, so as to initialize the light emitting unit connected thereto; and / or, in the same driving circuit, the second initialization unit is connected to the control end of the driving unit and the storage unit respectively, the second initialization unit is configured to transmit an initialization signal to the control end of the driving unit according to a third scan signal, so as to initialize the storage unit.

[0014] In one of the embodiments, optionally, the control end of the first initialization unit in the first driving circuit and the control end of the first initialization unit in the second driving circuit are connected to the same second scan line.

[0015] In one of the embodiments, optionally, the control end of the second initialization unit in the first driving circuit and the control end of the second initialization unit in the second driving circuit are connected to the same third scan line.

[0016] In one of the embodiments, optionally, the first initialization unit comprises a third transistor, in the same driving circuit, the first electrode of the third transistor is connected to the light emitting unit connected to the first initialization unit, the gate electrode of the third transistor is connected to the second scan line, and the second electrode of the third transistor is connected to an initialization signal line.

[0017] In one of the embodiments, optionally, the second initialization unit comprises a fourth transistor, in the same driving circuit, the first electrode of the fourth transistor is connected to the control end of the driving unit and the storage unit respectively, the gate electrode of the fourth transistor is connected to the third scan line, and the second electrode of the fourth transistor is connected to the initialization signal line.

[0018] In one of the embodiments, in the light emitting stage, the first power supply signal and the second power supply signal are configured to have high and low voltage jumps over time, and the high and low voltages of the two are opposite.

[0019] In one of the embodiments, optionally, the first driving circuit and the second driving circuit further comprise a first light emitting control unit and / or a second light emitting control unit, the first light emitting control unit in the first driving circuit is connected between the second end of the driving unit and the first electrode of the first light emitting unit, the first light emitting control unit in the second driving circuit is connected between the second end of the driving unit and the first electrode of the second light emitting unit, and the first light emitting control unit is configured to turn on or turn off the connection between the second end of the driving unit and the first electrode of the light emitting unit connected with the first light emitting control unit according to a light emitting control signal; and / or, the second light emitting control unit in the first driving circuit is connected between the first power supply line and the first end of the driving unit, the second light emitting control unit in the second driving circuit is connected between the second power supply line and the first end of the driving unit, and the second light emitting control unit is configured to turn on or turn off the connection between the power supply line connected with the second light emitting control unit and the first end of the driving unit according to a light emitting control signal.

[0020] In one of the embodiments, optionally, the control end of the first light emitting control unit in the first driving circuit and the control end of the first light emitting control unit in the second driving circuit are connected to the same control signal line.

[0021] In one of the embodiments, optionally, the control end of the second light emitting control unit in the first driving circuit and the control end of the second light emitting control unit in the second driving circuit are connected to the same control signal line.

[0022] In one of the embodiments, optionally, the first light emitting control unit comprises a fifth transistor, in the same driving circuit, the first electrode of the fifth transistor is connected with the second end of the driving unit, the gate electrode of the fifth transistor is connected with the control signal line, and the second electrode of the fifth transistor is connected with the first electrode of the light emitting unit connected with the first light emitting control unit.

[0023] In one of the embodiments, optionally, the second light emitting control unit comprises a sixth transistor, in the same driving circuit, the first electrode of the sixth transistor is connected with the first end of the driving unit, the gate electrode of the sixth transistor is connected with the control signal line, and the second electrode of the sixth transistor is connected with the power supply line connected with the second light emitting control unit.

[0024] A display device comprising the pixel circuit according to any one of the above embodiments.

[0025] In one of the embodiments, the pixel circuit is multiple and arranged in an array.

[0026] In one of the embodiments, optionally, in the same pixel circuit, the first driving circuit and the second driving circuit are arranged along a row direction; the first driving circuit and the second driving circuit are connected to the same data line, the data line extends along a column direction, and the row direction and the column direction intersect.

[0027] A driving method of a pixel circuit, for driving the pixel circuit of any one of the above embodiments, the driving method comprising, in the light emitting stage, configuring the first power supply signal and the second power supply signal received by the pixel circuit to have high and low jumps in voltage over time, so as to make the first light emitting unit and the second light emitting unit emit light alternately.

[0028] In one of the embodiments, the pixel circuit further comprises, in the working process of one display frame, before the light emitting stage, a first initialization stage, a data writing stage and a second initialization stage, and the driving method further comprises, in the first initialization stage, configuring the third scan signal to be a turn-on voltage, and configuring the first scan signal, the second scan signal and the light emitting control signal to be turn-off voltages; in the data writing stage, configuring the first scan signal to be a turn-on voltage, and configuring the second scan signal, the third scan signal and the light emitting control signal to be turn-off voltages; in the second initialization stage, configuring the second scan signal to be a turn-on voltage, and configuring the first scan signal, the third scan signal and the light emitting control signal to be turn-off voltages; and in the light emitting stage, configuring the light emitting control signal to be a turn-on voltage, and configuring the first scan signal, the second scan signal and the third scan signal to be turn-off voltages.

[0029] In one of the embodiments, optionally, in the data writing stage, the first power supply signal and the second power supply signal are the same, and in the data writing stage, the voltages of the first power supply signal and the second power supply signal are equal to the voltage of the first power supply signal when the first light emitting unit emits light in the light emitting stage.

[0030] In one of the embodiments, optionally, in the first initialization stage, the first power supply signal and the second power supply signal are the same, and in the first initialization stage, the voltages of the first power supply signal and the second power supply signal are equal to the voltage of the first power supply signal when the first light emitting unit emits light in the light emitting stage.

[0031] In one of the embodiments, optionally, in the second initialization stage, the first power supply signal and the second power supply signal are the same, and in the second initialization stage, the voltages of the first power supply signal and the second power supply signal are equal to the voltage of the second power supply signal when the first light emitting unit emits light in the light emitting stage.

[0032] In one of the embodiments, optionally, in the light emitting stage, the first power supply signal and the second power supply signal are configured to have high and low jumps in voltage over time, and the high and low voltages of the two are opposite.

[0033] The pixel circuit generates driving currents for driving the first and second light emitting units to emit light by the first and second driving circuits respectively. In the light emitting stage of one display frame of the pixel circuit, the first and second driving circuits output the driving currents alternately by setting the voltages on the first and second power lines to jump up and down with time, so that the first and second light emitting units emit light alternately in the light emitting stage. On the one hand, the first and second driving circuits work alternately in the light emitting stage, which can shorten the working time of each of the two driving circuits, thereby reducing the hysteresis effect of the driving circuit and the residual image. On the other hand, the two light emitting units emit light alternately, so that the brightness decay of the light emitting units can be reduced to some extent and the service life of the light emitting units can be prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments described in the present application, and those skilled in the art can also obtain other drawings according to these drawings without any creative labor.

[0035] Figure 1 Structure schematic diagram of the pixel circuit in one of the embodiments of the present application;

[0036] Figure 2 Structure schematic diagram of the pixel circuit in one of the embodiments of the present application;

[0037] Figure 3 Structure schematic diagram of the pixel circuit in one of the embodiments of the present application;

[0038] Figure 4 Method flow schematic diagram of the pixel driving method in one of the embodiments of the present application;

[0039] Figure 5 Timing schematic diagram of the pixel circuit in one of the embodiments of the present application;

[0040] Figure 6 Timing schematic diagram of the pixel circuit in one of the embodiments of the present application. DETAILED DESCRIPTION

[0041] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the related drawings. The preferred embodiments of the present application are shown in the drawings. However, the present application can be realized in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0043] In the case using "comprise", "have", and "include" in the description of the application herein, unless using the explicit limiting term, such as "only", "consist of", etc., another component can be added. Unless otherwise mentioned, the singular form of the term can include the plural form, and cannot be understood as the number of one.

[0044] It should be understood that, although the terms "first", "second" and the like can be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element without departing from the scope of the present application.

[0045] In this application, unless otherwise clearly specified and limited, the terms "connected", "connected" and the like should be understood broadly, for example, can be directly connected, can be indirectly connected through an intermediate medium, can be internal communication of two elements or interaction relationship of two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0046] Since the film transistor (TFT) prepared by the LTPS technology has a hysteresis effect in operation, leading to the problem of TFT residual image of the OLED (Organic Light-Emitting Diode) display, in the related art, the process of the active layer p-Si / gate insulating layer GI / capacitive dielectric layer CI and other film layers is controlled and the film quality is optimized to improve the response speed to the applied electric field, reduce the hysteresis and residual image. Or add the BSM process (Back Side Metal) to improve the back channel effect, reduce the influence of static electricity, make the light-emitting material work more stably, and improve the residual image performance. In addition, in the pixel circuit, the pressure difference between VGMP and VGSP is usually reduced, that is, the pressure difference between black and white states is reduced, and the influence of the gate voltage of the DTFT (Driving Transistor) is reduced to improve the residual image. However, the above process and circuit for improving the TFT hysteresis effect have the problems of complex process parameter adjustment, instability, long period from TFT preparation to output test evaluation, high investment cost, and slow effect.

[0047] Figure 1 For the structure diagram of the pixel circuit in one of the embodiments of the present application, in one of the embodiments, the pixel circuit can include a first light-emitting unit 10, a second light-emitting unit 20, a first driving circuit 100, and a second driving circuit 200.

[0048] Optionally, the circuit structures of the first driving circuit 100 and the second driving circuit 200 are the same or similar. Optionally, the circuit structures of the first driving circuit 100 and the second driving circuit 200 are the same and symmetric about a center of symmetry.

[0049] The first driving circuit 100 can be electrically connected to the first electrode of the first light-emitting unit 10, and the first driving circuit 100 is configured to generate a driving current for driving the first light-emitting unit 10 to emit light. The first driving circuit 100 can be used to generate a driving current transmitted to the first electrode of the first light-emitting unit 10 to drive the first light-emitting unit 10 to emit light. Similarly, the second driving circuit 200 can be electrically connected to the first electrode of the second light-emitting unit 20, and the second driving circuit 200 is configured to generate a driving current for driving the second light-emitting unit 20 to emit light. The second driving circuit 200 can be used to generate a driving current transmitted to the first electrode of the second light-emitting unit 20 to drive the second light-emitting unit 20 to emit light. In the same pixel circuit, the first light-emitting unit 10 and the second light-emitting unit 20 have the same light-emitting color.

[0050] The power input of the first driving circuit 100 and the second electrode of the second light emitting unit 20 can be connected with a first power line respectively, and the power input of the second driving circuit 200 and the second electrode of the first light emitting unit 10 can be connected with a second power line respectively. The first power line can be used to provide the first light emitting unit 20 and the first driving circuit 100 with a first power supply signal V1 respectively, and the second power line can be used to provide the second light emitting unit 10 and the second driving circuit 200 with a second power supply signal V2 respectively. The first power supply signal V1 can include a first working voltage ELVDD, which can provide the first driving circuit 100 with a positive working voltage, and the first power supply signal V1 can also include a second working voltage ELVSS, which can provide the second electrode of the second light emitting unit 20 with a negative working voltage. Similarly, the second power supply signal V2 can also include a first working voltage ELVDD, which can provide the second driving circuit 200 with a positive working voltage, and the second power supply signal V2 can also include a second working voltage ELVSS, which can provide the second electrode of the first light emitting unit 10 with a negative working voltage.

[0051] The pixel circuit can include a light emitting stage in the working process of a display frame. In the embodiment, the first power supply signal V1 and the second power supply signal V2 can be configured to have high and low jumps in voltage over time in the light emitting stage. That is, the first power supply signal V1 and the second power supply signal V2 are both alternating voltages or pulse voltages in the light emitting stage.

[0052] In some embodiments, the first power supply signal V1 and the second power supply signal V2 can be configured to have high and low jumps in voltage over time in the light emitting stage, and the voltage highs and lows of the two are opposite. That is, the first power supply signal V1 and the second power supply signal V2 are both alternating voltages or pulse voltages in the light emitting stage, but the voltage highs and lows of the first power supply signal V1 and the second power supply signal V2 are opposite at the same time. For example, when the first power supply signal V1 is a high voltage, the second power supply signal V2 is a low voltage.

[0053] The first power supply signal V1 and the second power supply signal V2 supply power to the first driving circuit 100 and the second driving circuit 200 alternately in the light emitting stage, and the first driving circuit 100 and the second driving circuit 200 output driving currents alternately in response to the voltage changes of the first power supply signal V1 and the second power supply signal V2, so that the first light emitting unit 10 and the second light emitting unit 20 can emit light alternately in the light emitting stage. The first light emitting unit 10 and the second light emitting unit 20 do not emit light at the same time, but emit light at different times.

[0054] In some embodiments, the technical effect of forming high-voltage ELVDD / low-voltage ELVSS alternating transitions of the first power supply signal V1 and the second power supply signal V2 can be achieved by the timing design of the signals in the light-emitting stage, by corresponding design of the signals output by the first power supply line and the second power supply line.

[0055] In some other embodiments, the power input terminals of the first driving circuit 100 and the second driving circuit 200 can be respectively connected to the power line continuously providing the high-voltage ELVDD, and the second poles of the first light-emitting unit 10 and the second light-emitting unit 20 can be respectively connected to the power line continuously providing the low-voltage ELVSS. By connecting the light-emitting control units in the two driving circuits to different light-emitting control lines and performing timing design of the light-emitting control signals EM transmitted in the two light-emitting control lines respectively, the voltages of the two light-emitting control signals EM are controlled to be alternatingly turned on in the light-emitting stage, so as to make the first light-emitting unit 10 and the second light-emitting unit 20 emit light alternately. For example, in the first half of the light-emitting stage, the voltage of the light-emitting control signal EM in the first driving circuit 100 is turned on, and the voltage of the light-emitting control signal EM in the second driving circuit 200 is turned off, so that the first light-emitting unit 10 emits light in the first half, and the second light-emitting unit 20 does not emit light in the first half; in the second half of the light-emitting stage, the voltage of the light-emitting control signal EM in the first driving circuit 100 is turned off, and the voltage of the light-emitting control signal EM in the second driving circuit 200 is turned on, so that the first light-emitting unit 10 does not emit light in the second half, and the second light-emitting unit 20 emits light in the second half.

[0056] Compared with the existing pixel circuit in which only one light-emitting unit emits light in the working process of one display frame, the above pixel circuit drives the first light-emitting unit 10 and the second light-emitting unit 20 by the first driving circuit 100 and the second driving circuit 200 respectively, simultaneously makes the first power supply line and the second power supply line provide the voltage signals with high-low jumps with opposite high and low voltages in the light-emitting stage, so as to form the bidirectional display of the two light-emitting units in one display frame. On the one hand, the first driving circuit 100 and the second driving circuit 200 work alternately in the light-emitting stage, which can shorten the working time of each of the two driving circuits, thereby reducing the hysteresis effect of the driving circuit and the residual image; on the other hand, the two light-emitting units emit light alternately, so the brightness decay of the light-emitting unit can be reduced to some extent and the service life of the light-emitting unit can be prolonged.

[0057] In one of the embodiments, the circuit structures of the first driving circuit 100 and the second driving circuit 200 are the same or similar, and the first driving circuit 100 and the second driving circuit 200 can each include a data writing unit 110, a storage unit 120, and a driving unit 130.

[0058] In the same driving circuit (e.g. the first driving circuit 100 or the second driving circuit 200), the data writing unit 110 can be connected to the control end of the driving unit 130, and the data writing unit 110 can be configured to write the data signal Data to the control end of the driving unit 130 according to the first scan signal Scan1. The data writing unit 110 can also be connected to the first scan line and the data line respectively, and the data writing unit 110 can obtain the first scan signal Scan1 through the first scan line and obtain the data signal Data through the data line, so as to transmit the data signal Data to the control end of the driving unit 130 according to the first scan signal S1.

[0059] In one of the embodiments, optionally, in the same pixel circuit, the first scan signal for controlling the data writing unit 110 in the two driving circuits can be the same signal, that is, the control end of the data writing unit 110 in the first driving circuit 100 and the control end of the data writing unit in the second driving circuit 200 are connected to the same first scan line.

[0060] In one of the embodiments, optionally, the data writing unit 110 in the first driving circuit 100 and the data writing unit in the second driving circuit 200 are connected to the same data line. In the same pixel circuit, the data line writes the same data voltage to the first driving circuit 100 and the second driving circuit 200.

[0061] The first end of the storage unit 120 in the first driving circuit 100 can be connected to the first power line, and the second end of the storage unit 120 in the first driving circuit 100 can be connected to the control end of the driving unit 130 in the first driving circuit 100. The first end of the storage unit 120 in the second driving circuit 200 can be connected to the second power line, and the second end of the storage unit 120 in the second driving circuit 200 can be connected to the control end of the driving unit 130 in the second driving circuit 200. In the same driving circuit, the storage unit 120 can be used to store the voltage at the control end of the driving unit 130.

[0062] The driving unit 130 in the first driving circuit 100 can be connected between the power input end of the first driving circuit 100 and the first electrode of the first light emitting unit 10, and the driving unit 130 in the second driving circuit 200 can be connected between the power input end of the second driving circuit 200 and the first electrode of the second light emitting unit 20. The driving unit 130 can be configured to generate a driving current according to the voltage at the control end of the driving unit 130. The driving current generated by the driving unit 130 in the first driving circuit 100 is transmitted to the first electrode of the first light emitting unit 10, which can drive the first light emitting unit 10 to emit light. The driving current generated by the driving unit 130 in the second driving circuit 200 is transmitted to the first electrode of the second light emitting unit 20, which can drive the second light emitting unit 20 to emit light.

[0063] In the pixel circuit provided by the embodiment of the present disclosure, the first driving circuit 100 and the second driving circuit 200 can use the data writing unit 110 to write the data signal Data into the control end of the driving unit 130 in response to the first scanning signal, and the storage unit 120 stores the voltage at the control end of the driving unit 130. The driving unit 130 generates a driving current according to the voltage at the control end of the driving unit 130, and drives the light emitting unit 10 to emit light by using the driving current.

[0064] Figure 2 FIG. 1 is a schematic diagram of a circuit structure of a pixel circuit in one embodiment of the present disclosure, Figure 2 The first driving circuit 100 and the second driving circuit 200 in the pixel circuit shown in the figure are driving circuits of a 6T1C structure. In one embodiment, the first driving circuit 100 and the second driving circuit 200 can be any driving circuit capable of outputting a driving current to drive a light emitting unit (for example, an OLED) to emit light, for example, a 7T1C or 4T2C structure, etc.

[0065] Please refer to Figure 2 In one embodiment, the driving unit 130 can include a first transistor T1, the storage unit 120 can include a storage capacitor C1, and the data writing unit 110 can include a second transistor T2. In Figure 2 In the embodiment, the circuit devices of the second driving circuit 200 are all marked with a prime mark to facilitate the distinction, for example, the first transistor in the second driving circuit 200 is marked as T1', the second transistor is marked as T2', etc. Since the circuit structures of the first driving circuit 100 and the second driving circuit 200 are the same or similar, in the embodiment, the working principle of the first driving circuit 100 is mainly described, and the working principle of the second driving circuit 200 can be referred to the working principle of the first driving circuit 100, and the repeated parts are not described herein.

[0066] In the embodiment of the present disclosure, a transistor refers to an element including at least a gate, a drain and a source. In the present disclosure, the first pole of the transistor can be the drain and the second pole can be the source, or the first pole can be the source and the second pole can be the drain. In the case of using a transistor or a circuit working with opposite polarity or changing the current direction, the functions of the "source" and the "drain" are sometimes interchanged. In the embodiment of the present disclosure, the first pole and the second pole of all or part of the transistors can be interchanged as needed.

[0067] The first pole of the first transistor T1 can be used as the first end of the driving unit 130, the gate of the first transistor T1 can be used as the control end of the driving unit 130, and the second pole of the first transistor T1 can be used as the second end of the driving unit 130.

[0068] The first electrode of the second transistor T2 can be connected with the control end of the driving unit 130, for example, connected with the gate of the first transistor T1, the gate of the second transistor T2 can be connected with the first scan line, and the second electrode of the second transistor T2 can be connected with the data line. The second transistor T2 can enter the on or off state according to the first scan signal Scan1 transmitted by the first scan line. When the second transistor T2 enters the on state, the data signal Data transmitted by the data line can be obtained through the second electrode of the second transistor T2, and the data signal Data is written into the control end of the driving unit 130.

[0069] In the embodiment, the control end of the data writing unit 110 in the first driving circuit 100 and the control end of the data writing unit in the second driving circuit 200 are connected to the same first scan line, which can refer to that the first scan line connected with the gate of the second transistor T2 and the first scan line connected with the gate of the second transistor T2' are the same scan line.

[0070] In the embodiment, the data writing unit 110 in the first driving circuit 100 and the data writing unit in the second driving circuit 200 are connected to the same data line, which can refer to that the data line connected with the second electrode of the second transistor T2 and the data line connected with the second electrode of the second transistor T2' can be the same data line.

[0071] The first end of the storage capacitor C1 in the first driving circuit 100 can be connected with the first power line, and the first power line can provide the first power supply signal V1. The first end of the storage capacitor C1' in the second driving circuit 200 can be connected with the second power line, and the second power line can provide the second power supply signal V2. In the same driving circuit, the second end of the storage capacitor C1 can be connected with the gate of the first transistor T1. The storage capacitor C1 can be used to store the voltage at the gate of the first transistor T1, that is, the voltage stored by the storage capacitor C1 is the data signal.

[0072] In one embodiment, the first light emitting unit 10 and the second light emitting unit 20 can be organic light emitting diodes (OLEDs). In actual applications, other devices capable of electroluminescence can also be used as the light emitting unit according to different design requirements. The first light emitting unit 10 can include a light emitting diode D1, and the second light emitting unit 20 can include a light emitting diode D2. In this embodiment, the first electrode of the first light emitting unit 10 and the first electrode of the second light emitting unit 20 can be an anode, and the second electrode of the first light emitting unit 10 and the second electrode of the second light emitting unit 20 can be a cathode. When the driving current generated by the first transistor T1 in the first driving circuit 100 is transmitted to the first electrode of the light emitting diode D1, the light emitting diode D1 can emit light with a brightness corresponding to the driving current; when the driving current generated by the first transistor T1' in the second driving circuit 200 is transmitted to the first electrode of the light emitting diode D2, the light emitting diode D2 can also emit light with a brightness corresponding to the driving current.

[0073] Figure 3 For another embodiment of the pixel circuit of the present application, Figure 3 The first driving circuit 100 and the second driving circuit 200 of the pixel circuit shown are driving circuits of a 7T1C structure. In one embodiment, the first driving circuit 100 and the second driving circuit 200 can further include a compensation unit 180.

[0074] The data writing unit 110 can be connected to the first end of the driving unit 130, and the data writing unit 110 can be configured to write the data signal Data to the first end of the driving unit 130 according to the first scan signal Scan1. The data writing unit 110 can be connected to the first scan line and the data line respectively, and the data writing unit 110 can obtain the first scan signal Scan1 through the first scan line and obtain the data signal Data through the data line, so as to transmit the data signal Data to the first end of the driving unit 130 according to the first scan signal S1.

[0075] In one embodiment, in the same pixel circuit, the control end of the data writing unit in the first driving circuit 100 and the control end of the data writing unit in the second driving circuit 200 can be connected to the same first scan line. Alternatively, the data writing unit in the first driving circuit 100 and the data writing unit in the second driving circuit 200 can also be connected to the same data line.

[0076] In the first driving circuit 100, the first end of the storage unit 120 can be connected to the first power supply line, and the second end of the storage unit 120 can be connected to the control terminal of the driving unit 130 in the first driving circuit 100. In the second driving circuit 200, the first end of the storage unit 120 can be connected to the second power supply line, and the second end of the storage unit 120 can be connected to the control terminal 110 of the driving unit 130 in the second driving circuit 200. In the same driving circuit, the storage unit 120 can be used to store the voltage at the control terminal of the driving unit 130.

[0077] The driving unit 130 in the first driving circuit 100 can be connected between the power input terminal of the first driving circuit 100 and the first electrode of the first light-emitting unit 10. The driving unit 130 in the second driving circuit 200 can be connected between the power input terminal of the second driving circuit 200 and the first electrode of the second light-emitting unit 20. The driving unit 130 can be configured to generate a driving current based on the voltage at the control terminal of the driving unit 130. The driving current generated by the driving unit 130 in the first driving circuit 100 is transmitted to the first electrode of the first light-emitting unit 10, which can drive the first light-emitting unit 10 to emit light. The driving current generated by the driving unit 130 in the second driving circuit 200 is transmitted to the first electrode of the second light-emitting unit 20, which can drive the second light-emitting unit 20 to emit light.

[0078] In the same driving circuit, the compensation unit 180 can be connected between the control terminal and the second terminal of the driving unit 130. The compensation unit 180 can be configured to perform threshold compensation on the driving unit 130 according to the first scan signal Scan1. The compensation unit 180 can also be connected to the first scan line to obtain the first scan signal Scan1, so that the compensation unit 180 can perform threshold compensation on the driving unit 130 according to the first scan signal Scan1.

[0079] In one embodiment, optionally, in the same pixel circuit, the compensation unit 180 in the first driving circuit 100 and the compensation unit in the second driving circuit 100 can be connected to the same first scan line.

[0080] like Figure 3 As shown, in one embodiment, the first terminal of the first transistor T1 can be used as the first terminal of the driving unit 130, the gate of the first transistor T1 can be used as the control terminal of the driving unit 130, and the second terminal of the first transistor T1 can be used as the second terminal of the driving unit 130.

[0081] The first electrode of the second transistor T2 can be connected with the first electrode of the first transistor T1, the gate electrode of the second transistor T2 can be connected with the first scan line, and the second electrode of the second transistor T2 can be connected with the data line. The second transistor T2 can enter the conductive state or the non-conductive state according to the first scan signal Scan1 transmitted by the first scan line. When the second transistor T2 enters the conductive state, the second electrode of the second transistor T2 can obtain the data signal Data transmitted by the data line, and the data signal Data can be written into the first end of the driving unit 130.

[0082] In the embodiment, the control end of the data writing unit 110 in the first driving circuit 100 and the control end of the data writing unit in the second driving circuit 200 are connected to the same first scan line, which can refer to that the first scan line connected with the gate electrode of the second transistor T2 and the first scan line connected with the gate electrode of the second transistor T2' are the same scan line.

[0083] The first end of the storage capacitor C1 in the first driving circuit 100 can be connected with the first power supply line, and the first power supply line can continuously provide the first power supply signal V1. The first end of the storage capacitor C1' in the second driving circuit 200 can be connected with the second power supply line, and the second power supply line can continuously provide the second power supply signal V2. In the same driving circuit, the second end of the storage capacitor C1 can be connected with the gate electrode of the first transistor T1. The storage capacitor C1 can be used for storing the voltage at the gate electrode of the first transistor T1, that is, the voltage stored by the storage capacitor C1 is the data signal after threshold compensation.

[0084] The compensation unit 180 can include the seventh transistor T7. The first electrode of the seventh transistor T7 can be connected with the control end of the driving unit 130, the second electrode of the seventh transistor T7 can be connected with the second end of the driving unit 130, and the gate electrode of the seventh transistor T7 can be connected with the first scan line (which can be used for transmitting the first scan signal Scan1). The seventh transistor T7 can obtain the first scan signal Scan1 transmitted by the first scan line through the gate electrode, and the first scan signal Scan1 can be used for controlling the seventh transistor T7 to enter the conductive state or the non-conductive state. When the seventh transistor T7 enters the conductive state according to the first scan signal Scan1, the driving unit 130 can be threshold compensated.

[0085] In the embodiment, optionally, in the same pixel circuit, the control end of the compensation unit 180 in the first driving circuit 100 and the control end of the compensation unit 180 in the second driving circuit 200 are connected to the same first scan line, which can refer to that the first scan line connected with the gate electrode of the seventh transistor T7 and the first scan line connected with the gate electrode of the seventh transistor T7' are the same scan line.

[0086] Please refer to Figure 2 and Figure 3In one of the embodiments, the first driving circuit 100 and the second driving circuit 200 can further comprise a first initialization unit 140 and / or a second initialization unit 150.

[0087] The first initialization unit 140 in the first driving circuit 100 can be connected with the first electrode of the first light emitting unit 10, and the first initialization unit 140 in the second driving circuit 200 can be connected with the first electrode of the second light emitting unit 20. The first initialization unit 140 in the two driving circuits can be further connected with a second scan line to obtain a second scan signal Scan2 through the second scan line. The first initialization unit 140 can be configured to transmit an initialization signal Vref to the anode of the light emitting diode D1 or the anode of the light emitting diode D2 according to the second scan signal Scan2, so as to initialize the anode of the light emitting diode D1 or the anode of the light emitting diode D2.

[0088] In one of the embodiments, optionally, in the same pixel circuit, the control end of the first initialization unit 140 in the first driving circuit 100 and the control end of the first initialization unit 140 in the second driving circuit 200 can be connected to the same second scan line.

[0089] In the same driving circuit, the second initialization unit 150 can be connected with the control end of the driving unit 130 and the storage unit 120. The second initialization unit 150 in the two driving circuits can be further connected with a third scan line to obtain a third scan signal Scan3 through the third scan line. The second initialization unit 150 can be configured to transmit an initialization signal Vref to the control end of the driving unit 130 according to the third scan signal Scan3, so as to initialize the storage unit 120.

[0090] In one of the embodiments, optionally, in the same pixel circuit, the control end of the second initialization unit 150 in the first driving circuit 100 and the control end of the second initialization unit 150 in the second driving circuit 200 can be connected to the same third scan line.

[0091] In one of the embodiments, the first initialization unit 140 can include a third transistor T3. The first electrode of the third transistor T3 in the first driving circuit 100 can be connected to the anode of the light emitting diode D1, the first electrode of the third transistor T3' in the second driving circuit 200 can be connected to the anode of the light emitting diode D2, the gate of the third transistor T3 in both driving circuits can be connected to a second scan line (which can be used to transmit a second scan signal Scan2), and the second electrode of the third transistor T3 in both driving circuits can be connected to an initialization signal line (which can be used to transmit an initialization signal Vref). The third transistor T3 can receive the second scan signal Scan2 transmitted by the second scan line through the gate, and the second scan signal Scan2 can be used to control the turn-on or turn-off of the third transistor T3, so that the third transistor T3 or the third transistor T3' can transmit the initialization signal Vref to the anode of the light emitting diode D1 or the anode of the light emitting diode D2 when turned on according to the second scan signal Scan2, so as to reset the anode of the light emitting diode D1 or the anode of the light emitting diode D2.

[0092] In the present embodiment, in the same pixel circuit, the control end of the first initialization unit 140 in the first driving circuit 100 and the control end of the first initialization unit 140 in the second driving circuit 200 are connected to the same second scan line, which can mean that the second scan line to which the gate of the third transistor T3 is connected and the second scan line to which the gate of the third transistor T3' is connected are the same scan line.

[0093] In one of the embodiments, the second initialization unit 150 can include a fourth transistor T4. In the same driving circuit, the first electrode of the fourth transistor T4 can be connected to the control end of the driving unit 130 and the storage unit 120 respectively, the gate of the fourth transistor T4 is connected to a third scan line (which can be used to transmit a third scan signal Scan3), and the second electrode of the fourth transistor T4 is connected to an initialization signal line. The fourth transistor T4 can receive the third scan signal Scan3 transmitted by the third scan line through the gate, and the third scan signal Scan3 can be used to control the turn-on or turn-off of the fourth transistor T4. In the same driving circuit, the fourth transistor T4 can transmit the initialization signal Vref to the control end of the driving unit 130 when turned on according to the third scan signal Scan3, so as to initialize the control end of the driving unit 130 and the storage unit 120.

[0094] In the present embodiment, in the same pixel circuit, the control end of the second initialization unit 150 in the first driving circuit 100 and the control end of the second initialization unit 150 in the second driving circuit 200 are connected to the same third scan line, which can mean that the third scan line to which the gate of the fourth transistor T4 is connected and the third scan line to which the gate of the fourth transistor T4' is connected are the same scan line.

[0095] Referring to Figure 2 and Figure 3 In one embodiment, the first driving circuit 100 and the second driving circuit 200 can further comprise a first light emitting control unit 160 and / or a second light emitting control unit 170.

[0096] The first light emitting control unit 160 in the first driving circuit 100 can be connected between the third terminal of the driving unit 130 and the first electrode of the first light emitting unit 10, and the first light emitting control unit 160 in the second driving circuit 200 can be connected between the third terminal of the driving unit 130 and the first electrode of the second light emitting unit 20. The first light emitting control unit 160 in the two driving circuits can also be connected to a control signal line (which can be used to transmit a light emitting control signal EM).

[0097] In one embodiment, in the same pixel circuit, the control terminal of the first light emitting control unit 160 in the first driving circuit 100 and the control terminal of the first light emitting control unit 160 in the second driving circuit 200 can be connected to the same control signal line.

[0098] The first light emitting control unit 160 in the first driving circuit 100 can be configured to turn on or turn off the connection between the second terminal of the driving unit 130 and the first electrode of the first light emitting unit 10 according to the light emitting control signal EM. The first light emitting control unit 160 in the second driving circuit 200 can be configured to turn on or turn off the connection between the second terminal of the driving unit 130 and the first electrode of the second light emitting unit 20 according to the light emitting control signal EM.

[0099] The second light emitting control unit 170 in the first driving circuit 100 can be connected between the first power supply line and the first terminal of the driving unit 130, and the second light emitting control unit 170 in the second driving circuit 200 can be connected between the second power supply line and the first terminal of the driving unit 130. The second light emitting control unit 170 in the two driving circuits can also be connected to a control signal line (which can be used to transmit a light emitting control signal EM).

[0100] In one embodiment, in the same pixel circuit, the control terminal of the second light emitting control unit 170 in the first driving circuit 100 and the control terminal of the second light emitting control unit 170 in the second driving circuit 200 can be connected to the same control signal line.

[0101] The second light emitting control unit 170 in the first driving circuit 100 can be configured to turn on or turn off the connection between the first power supply line and the first terminal of the driving unit 130 according to the light emitting control signal EM, and the second light emitting control unit 170 in the second driving circuit 200 can be configured to turn on or turn off the connection between the second power supply line and the first terminal of the driving unit 130 according to the light emitting control signal EM.

[0102] In one embodiment, the first light emitting control unit 160 can include a fifth transistor T5. The first electrode of the fifth transistor T5 in the same drive circuit can be connected to the second terminal of the drive unit 130, the gate of the fifth transistor T5 can be connected to a control signal line (which can be used to transmit a light emitting control signal EM), the second electrode of the fifth transistor T5 in the first drive circuit 100 can be connected to the first electrode (e.g. anode) of the light emitting diode D1, and the second electrode of the fifth transistor T5' in the second drive circuit 200 can be connected to the first electrode (e.g. anode) of the light emitting diode D2. The fifth transistor T5 can receive the light emitting control signal EM transmitted by the control signal line through the gate, and the light emitting control signal EM can be used to control the conduction or turn-off of the fifth transistor T5, so that the first light emitting control unit 160 can turn on or turn off the connection between the second terminal of the drive unit 130 and the first electrode of the light emitting diode according to the light emitting control signal EM.

[0103] In the present embodiment, in the same pixel circuit, the control terminal of the first light emitting control unit 160 in the first drive circuit 100 and the control terminal of the first light emitting control unit 160 in the second drive circuit 200 can be connected to the same control signal line, which can mean that the control signal line connected to the gate of the fifth transistor T5 and the control signal line connected to the gate of the fifth transistor T5' are the same signal line.

[0104] In one embodiment, the second light emitting control unit 170 can include a sixth transistor T6, the first electrode of the sixth transistor T6 in the same drive circuit can be connected to the first terminal of the drive unit 130, the gate of the sixth transistor T6 can be connected to a control signal line, the second electrode of the sixth transistor T6 in the first drive circuit 100 can be connected to the first power supply line, and the second electrode of the sixth transistor T6' in the second drive circuit 200 can be connected to the second power supply line. The sixth transistor T6 can receive the light emitting control signal EM transmitted by the control signal line through the gate, and the light emitting control signal EM can also be used to control the conduction or turn-off of the sixth transistor T6, so that the second light emitting control unit 170 can turn on or turn off the connection between the power supply line (e.g. the first power supply line or the second power supply line) and the first terminal of the drive unit 130 according to the light emitting control signal EM.

[0105] In the present embodiment, in the same pixel circuit, the control terminal of the second light emitting control unit 170 in the first drive circuit 100 and the control terminal of the second light emitting control unit 170 in the second drive circuit 200 can be connected to the same control signal line, which can mean that the control signal line connected to the gate of the sixth transistor T6 and the control signal line connected to the gate of the sixth transistor T6' are the same signal line.

[0106] In one of the embodiments, the P-type TFT has more obvious advantages than the N-type TFT in the field of display technology, has better STS (Subthreshold Swing), so that the low gray scale can be better developed to realize higher quality display application. Therefore, the first transistor T1, the second transistor T2, the third transistor T3, the fourth transistor T4, the fifth transistor T5, the sixth transistor T6 and the seventh transistor T7 can all be selected as P-type transistors, for example, can be polycrystalline silicon thin film transistors. In some other embodiments, the device selection of each unit in the pixel circuit can also be selected according to the actual application requirements. The first transistor T1, the second transistor T2, the third transistor T3, the fourth transistor T4, the fifth transistor T5, the sixth transistor T6 and the seventh transistor T7 can be P-type transistors or N-type transistors.

[0107] The embodiment of the present application can also provide a display device, which can include the pixel circuit described in any of the above embodiments.

[0108] In one of the embodiments, the display device can include a plurality of pixel circuits, and the plurality of pixel circuits are arranged in an array in the display device. The display device can be a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator or any product or component having a display function.

[0109] In one of the embodiments, optionally, in the same pixel circuit, the first driving circuit 100 and the second driving circuit 200 are arranged in a row direction. The first driving circuit 100 and the second driving circuit 200 can be connected to the same data line, and the data line can extend in a column direction. The row direction and the column direction can intersect, for example, perpendicular.

[0110] Based on the description of the above pixel circuit embodiments, the present disclosure can also provide a driving method of the pixel circuit. The pixel circuit can include a device (including a distributed system), software (application), module, component, server, client, etc. using the driving method described in the embodiments of the present application and combining the necessary implementation hardware. Based on the same innovative concept, the driving method in one or more embodiments provided by the embodiments of the present disclosure is described in the following embodiments. Since the implementation scheme of the driving method solves the problem, which is similar to the above-mentioned pixel circuit, the specific driving method of the embodiments of the present application can be referred to the foregoing implementation of the pixel circuit, and the repeated parts will not be described herein. The term "unit" or "module" used below can be a combination of software and / or hardware that realizes a predetermined function. Although the method described in the following embodiments is preferably realized in software, the realization of hardware or a combination of software and hardware is also possible and conceived.

[0111] The application can also provide a driving method of the pixel circuit, Figure 4 For a method flowchart of the pixel driving method in one of the embodiments of the application, in one of the embodiments, the driving method of the pixel circuit can include the following step S100.

[0112] Step S100: in the light-emitting stage, the first power supply signal and the second power supply signal received by the pixel circuit are configured to have high and low jumps in voltage over time, so that the first light-emitting unit and the second light-emitting unit emit light alternately.

[0113] The pixel circuit provided in the above embodiments can include a light-emitting stage in the working process of one display frame. In the light-emitting stage, the first power supply signal V1 and the second power supply signal V2 are configured to have high and low jumps in voltage over time, and the high and low voltages of the two are opposite. That is, the first power supply signal V1 and the second power supply signal V2 are both alternating voltage or pulse voltage in the light-emitting stage.

[0114] In some embodiments, the first power supply signal V1 and the second power supply signal V2 can be configured to have high and low jumps in voltage over time in the light-emitting stage, and the high and low voltages of the two are opposite. That is, the first power supply signal V1 and the second power supply signal V2 are both alternating voltage or pulse voltage in the light-emitting stage. At the same time, the high and low voltages of the first power supply signal V1 and the second power supply signal V2 can be opposite. For example, when the first power supply signal V1 is high voltage, the second power supply signal V2 is low voltage. When the first power supply signal V1 is low voltage, the second power supply signal V2 is high voltage.

[0115] Compared with the existing pixel circuit in which one light-emitting unit emits light per frame, in the driving method of the above pixel circuit, the first driving circuit 100 and the second driving circuit 200 drive the first light-emitting unit 10 and the second light-emitting unit 20 respectively. By providing the first power supply line and the second power supply line with voltage signals having high and low jumps in voltage over time and opposite high and low voltages in the light-emitting stage, bidirectional display of two light-emitting units in one display frame is formed. On the one hand, the first driving circuit 100 and the second driving circuit 200 work alternately in the light-emitting stage, which can shorten the working time of each of the two driving circuits, thereby reducing the hysteresis effect of the driving circuit and reducing the residual image. On the other hand, the two light-emitting units emit light alternately, so the brightness decay of the light-emitting unit can be reduced to some extent and the service life of the light-emitting unit can be prolonged.

[0116] Figure 5 For a timing diagram of the pixel circuit in one of the embodiments of the application, Figure 5 In this embodiment, the first power supply signal V1 and the second power supply signal V2 are configured to have high and low jumps in voltage over time in the light-emitting stage.Figure 2 or Figure 3 Taking the pixel circuit shown as an example, combined with Figure 5 The timing diagram shown provides a detailed description of the operation of the pixel circuit within a display frame. Figure 2 or Figure 3 In the pixel circuit shown, all transistors are P-type transistors. Therefore, the turn-on voltage of the transistors in the figure is low, and the cut-off voltage is high.

[0117] In one embodiment, the pixel circuitry may include a first initialization phase, a data writing phase, a second initialization phase, and a light emission phase during the operation of a display frame.

[0118] In the first initialization phase S1, the third scan signal Scan3 can be configured as the on-voltage, and the first scan signal Scan1, the second scan signal Scan2, and the light emission control signal EM can be configured as the off-voltage. That is, in the first initialization phase S1, the fourth transistor T4 and the fourth transistor T4' are turned on, while the other transistors are turned off.

[0119] Therefore, during the first initialization phase S1, the first driving circuit 100 can transmit the initialization signal Vref to the gate of the first transistor T1 through the fourth transistor T4, and the second driving circuit 200 can transmit the initialization signal Vref to the gate of the first transistor T1' through the fourth transistor T4'. Since the gate of the first transistor T1 is connected to the storage capacitor C1, and the gate of the first transistor T1' is connected to the storage capacitor C1', the initialization signal Vref can initialize either the storage capacitor C1 or the storage capacitor C1'. Additionally, the initialization signal Vref can also apply a negative initial voltage to the gates of the first transistor T1 and the first transistor T1' to initialize them.

[0120] In one embodiment, optionally, during the first initialization phase S1, the first power supply signal V1 and the second power supply signal V2 can be configured as the same signal. Specifically, during the first initialization phase S1, the voltage of the first power supply signal V1 and the voltage of the second power supply signal V2 can both be equal to the voltage provided by the first power supply signal V1 when the first light-emitting unit 10 emits light during the light-emitting phase S4. During the light-emitting phase S4, to ensure that the relationship between the gate-source voltage difference between the gate and the first electrode of the first transistor T1 and the threshold voltage satisfies the conduction condition, thereby enabling the output of a drive current to drive the first light-emitting unit 10 to emit light, the first power supply signal V1 can be configured as a high level ELVDD, and the second power supply signal V2 can be configured as a low level ELVSS. During the first initialization phase S1, the voltage of the first power supply signal V1 and the voltage of the second power supply signal V2 can both be at the high level ELVDD.

[0121] In the data writing stage S2, the first scan signal Scan1 can be configured as a turn-on voltage, and the second scan signal Scan2, the third scan signal Scan3 and the emission control signal EM can be configured as turn-off voltages. At this time, the second transistor T2, the seventh transistor T7, the second transistor T2', the seventh transistor T7' are turned on, and the third transistor T3, the fourth transistor T4, the fifth transistor T5, the sixth transistor T6, the third transistor T3', the fourth transistor T4', the fifth transistor T5' and the sixth transistor T6' are all turned off.

[0122] In one embodiment, optionally, in the data writing stage S2, the first power supply signal V1 and the second power supply signal V2 can also be configured as the same signal. Specifically, in the data writing stage S2, the voltage of the first power supply signal V1 and the voltage of the second power supply signal V2 can both be equal to the voltage provided by the first power supply signal V1 when the first light emitting unit 10 emits light in the light emitting stage S4. In the light emitting stage S4, in order to make the gate-source voltage difference of the first transistor T1 and the threshold voltage meet the turn-on condition, so as to be able to output a driving current to drive the first light emitting unit 10 to emit light, the first power supply signal V1 can be configured as a high level ELVDD, and the second power supply signal V2 can be configured as a low level ELVSS. In the data writing stage S2, the voltage of the first power supply signal V1 and the voltage of the second power supply signal V2 can both be high level ELVDD.

[0123] In the data writing stage S2, the second transistor T2 can transmit the threshold-compensated data signal Data+Vth to the gate of the first transistor T1, where Vth is the threshold voltage of the first transistor T1. Since the first end of the storage capacitor C1 is connected to the first power supply line, and the second end of the storage capacitor C1 is connected to the gate of the first transistor T1, the potential at the first end of the storage capacitor C1 in the first driving circuit 100 is ELVDD, and the potential at the second end is Data+Vth, which realizes the compensation of the threshold voltage of the first transistor T1, so that the voltage stored in the storage capacitor C1 is the voltage difference between ELVDD and Data+Vth. Similarly, the voltage stored in the storage capacitor C1' in the second driving circuit 200 is also the voltage difference between ELVDD and Data+Vth. Thus, in the light emitting stage S4, when the first transistor T1 or the first transistor T1' is turned on, the gate-source voltage Vgs of the first transistor T1 or the first transistor T1' is Data+Vth.

[0124] In the second initialization stage S3, the second scan signal Scan2 can be configured as a turn-on voltage (e.g. low voltage), and the first scan signal Scan1, the third scan signal Scan3 and the emission control signal EM are configured as turn-off voltages (e.g. high voltage), i.e. the third transistor T3 and the third transistor T3' are turned on in the second initialization stage S3, and the rest of the transistors are turned off.

[0125] Therefore, in the second initialization stage S3, the first driving circuit 100 can transmit the initialization signal Vref to the first electrode of the light-emitting diode D1 through the third transistor T3, and the second driving circuit 200 can transmit the initialization signal Vref to the first electrode of the light-emitting diode D2 through the third transistor T3'. A negative voltage is applied to the first electrode of the light-emitting diode D1 and the first electrode of the light-emitting diode D2 by the initialization signal Vref, so as to initialize the first electrode of the light-emitting diode D1 and the first electrode of the light-emitting diode D2, thereby preventing the influence of the electrical signal remaining in the light-emitting stage of the last display frame on this time of light-emitting.

[0126] In one embodiment, optionally, in the second initialization stage S3, the first power supply signal V1 and the second power supply signal V2 can be configured as the same signal. Specifically, in the second initialization stage S3, the voltage of the first power supply signal V1 and the voltage of the second power supply signal V2 can be equal to the voltage provided by the second power supply signal V2 when the first light-emitting unit 10 emits light in the light-emitting stage S4. In the light-emitting stage S4, in order to make the gate-source voltage difference of the first transistor T1 and the threshold voltage meet the turn-on condition, so as to be able to output a driving current to drive the first light-emitting unit 10 to emit light, the first power supply signal V1 can be configured as a high level ELVDD, and the second power supply signal V2 can be configured as a low level ELVSS. In the second initialization stage S3, the voltage of the first power supply signal V1 and the voltage of the second power supply signal V2 can be low level ELVSS.

[0127] In the light-emitting stage S4, the emission control signal EM can be configured as a turn-on voltage, and the first scan signal Scan1, the second scan signal Scan2 and the third scan signal Scan3 can be configured as turn-off voltages. That is, in the light-emitting stage S4, the fifth transistor T5, the sixth transistor T6, the fifth transistor T5' and the sixth transistor T6' are turned on, and the second transistor T2, the third transistor T3, the fourth transistor T4, the seventh transistor T7, the second transistor T2', the third transistor T3', the fourth transistor T4' and the seventh transistor T7' are turned off.

[0128] When the fifth transistor T5, the sixth transistor T6, the fifth transistor T5', and the sixth transistor T6' are turned on according to the light-emitting control signal EM, the first power supply line and the first electrode of the first transistor T1 in the first drive circuit 100, and the connection between the second electrode of the first transistor T1 and the first electrode of the light-emitting diode D1 are all turned on; the second power supply line and the first electrode of the first transistor T1'in the second drive circuit 200, and the connection between the second electrode of the first transistor T1'and the first electrode of the light-emitting diode D2 are all turned on.

[0129] The first power supply signal V1 provided by the first power supply line is transmitted to the first electrode of the first transistor T1 through the sixth transistor T6. If the high-low relationship of the first power supply signal V1 and the second power supply signal V2 is consistent with the corresponding relationship of the anode and the cathode of the light-emitting diode D1, the gate-source voltage difference of the gate and the first electrode of the first transistor T1 meets the turn-on condition with the threshold voltage, and the driving current generated by the first transistor T1 can be transmitted to the first electrode of the light-emitting diode D1 through the fifth transistor T5. If the high-low relationship of the first power supply signal V1 and the second power supply signal V2 is inconsistent with the corresponding relationship of the anode and the cathode of the light-emitting diode D1, the gate-source voltage difference of the gate and the first electrode of the first transistor T1 does not meet the turn-on condition with the threshold voltage, and the first transistor T1 will not be able to generate driving current.

[0130] Similarly, the second power supply signal V2 provided by the second power supply line is transmitted to the first electrode of the first transistor T1'through the sixth transistor T6'. If the high-low relationship of the first power supply signal V1 and the second power supply signal V2 is consistent with the corresponding relationship of the anode and the cathode of the light-emitting diode D2, the gate-source voltage difference of the gate and the first electrode of the first transistor T1'meets the turn-on condition with the threshold voltage, and the driving current generated by the first transistor T1'can be transmitted to the first electrode of the light-emitting diode D2 through the fifth transistor T5'. If the high-low relationship of the first power supply signal V1 and the second power supply signal V2 is inconsistent with the corresponding relationship of the anode and the cathode of the light-emitting diode D2, the gate-source voltage difference of the gate and the first electrode of the first transistor T1'does not meet the turn-on condition with the threshold voltage, and the first transistor T1'will not be able to generate driving current.

[0131] As Figure 5, the first supply signal V1 and the second supply signal V2 are alternating voltages in the light emitting stage S4, the voltages of the first supply signal V1 and the second supply signal V2 are high-low jumping in the light emitting stage S4, and the high-low of the voltages of the two supply signals are opposite. For example, when the voltage of the first supply signal V1 is the high voltage ELVDD, the voltage of the second supply signal V1 is the low voltage ELVSS, when the voltage of the first supply signal V1 is the low voltage ELVSS, the voltage of the second supply signal V1 is the high voltage ELVDD. Therefore, the first supply signal V1 and the second supply signal V2 can make the light emitting diode D1 and the light emitting diode D2 emit light alternately.

[0132] As shown in the light emitting stage S4, Figure 5 in the first half of the light emitting stage a, the first supply signal V1 is the high voltage ELVDD, and the second supply signal V2 is the low voltage ELVSS. The high voltage ELVDD provided by the first power line is transmitted to the first electrode of the first transistor T1 through the sixth transistor T6, and the high voltage ELVDD provided by the first power line is also transmitted to the second electrode of the light emitting diode D2. The low voltage ELVSS provided by the second power line is transmitted to the first electrode of the first transistor T1' through the sixth transistor T6', and the low voltage ELVSS provided by the second power line is also transmitted to the second electrode of the light emitting diode D1.

[0133] At this time, in the first drive circuit 100, the high-low relationship of the first supply signal V1 and the second supply signal V2 is consistent with the corresponding relationship of the anode and the cathode of the light emitting diode D1, the gate-source voltage difference of the gate and the first electrode of the first transistor T1 meets the conduction condition with the threshold voltage, and therefore the driving current generated by the first transistor T1 can be transmitted to the first electrode of the light emitting diode D1 through the fifth transistor T5 to drive the light emitting diode D1 to emit light. In the second drive circuit 200, the high-low relationship of the first supply signal V1 and the second supply signal V2 is inconsistent with the corresponding relationship of the anode and the cathode of the light emitting diode D2, the gate-source voltage difference of the gate and the first electrode of the first transistor T1' does not meet the conduction condition with the threshold voltage, and therefore the light emitting diode D2 does not emit light.

[0134] In the second half of the light emitting stage b, the first supply signal V1 is the low voltage ELVSS, and the second supply signal V2 is the high voltage ELVDD. The low voltage ELVSS provided by the first power line is transmitted to the first electrode of the first transistor T1 through the sixth transistor T6, and the low voltage ELVSS provided by the first power line is transmitted to the second electrode of the light emitting diode D2. The high voltage ELVDD provided by the second power line is transmitted to the first electrode of the first transistor T1' through the sixth transistor T6', and the high voltage ELVDD provided by the second power line is also transmitted to the second electrode of the light emitting diode D1.

[0135] At this time, in the second driving circuit 200, the high-low relationship of the first power supply signal V1 and the second power supply signal V2 is consistent with the corresponding relationship of the anode and the cathode of the light-emitting diode D2, and the gate-source voltage difference of the gate and the first electrode of the first transistor T1' meets the conduction condition with the threshold voltage, so that the driving current generated by the first transistor T1' can be transmitted to the first electrode of the light-emitting diode D2 through the fifth transistor T5' to drive the light-emitting diode D2 to emit light. In the first driving circuit 100, the high-low relationship of the first power supply signal V1 and the second power supply signal V2 is inconsistent with the corresponding relationship of the anode and the cathode of the light-emitting diode D1, and the gate-source voltage difference of the gate and the first electrode of the first transistor T1 does not meet the conduction condition with the threshold voltage, so that the light-emitting diode D1 does not emit light.

[0136] It can be seen that, in the above pixel circuit, the first driving circuit 100 and the second driving circuit 200 are used to drive the light-emitting diode D1 and the light-emitting diode D2 respectively, and at the same time, the first power supply signal V1 and the second power supply signal V2 are configured to have high and low jumps in voltage over time at the light-emitting stage S4, and the voltage of the two power supply signals is opposite, so that the light-emitting diode D1 and the light-emitting diode D2 can emit light alternately at the light-emitting stage S4 according to the voltage change of the first power supply signal V1 and the second power supply signal V2. On the one hand, the working time of the driving transistor in the first driving circuit 100 and the second driving circuit 200 can be shortened, and the electrical stress of the driving transistor is effectively reduced, so as to reduce the hysteresis effect and reduce the TFT residual image. On the other hand, the alternating light-emitting of the two OLEDs can also reduce the brightness decay of the OLED device to some extent, and prolong the service life of the OLED device.

[0137] Figure 6 For the timing diagram of the pixel circuit in another embodiment of the present application, the first power supply signal V1 and the second power supply signal V2 can also be alternating voltage signals as shown in Figure 6 The light-emitting stage corresponds to two alternating periods so that the light-emitting diode D1 and the light-emitting diode D2 emit light alternately twice. In some other embodiments, the alternating period at the light-emitting stage can also be set arbitrarily according to display requirements, and one light-emitting stage can correspond to a plurality of alternating periods so that the two OLEDs emit light alternately uniformly at the light-emitting stage. The light-emitting time of the two OLEDs can also be made uneven to adapt to the performance difference of the OLED device.

[0138] Each of the embodiments in the specification is described in a progressive manner, and the same and similar parts between the embodiments can be referred to each other. Each embodiment focuses on the difference from other embodiments. Especially, for the hardware+program type embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the related parts can be referred to the part of the method embodiment.

[0139] In the description of the specification, the description of the terms "some embodiments", "other embodiments", "ideal embodiments", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiments or examples are contained in at least one embodiment or example of the present application. In the description, the illustrative description of the above terms does not necessarily refer to the same embodiment or example.

[0140] The technical features of the above-described embodiments can be combined arbitrarily, and for the sake of brevity, all possible combinations of the technical features in the above-described embodiments are not described, but as long as the combinations of the technical features do not contradict each other, they should be considered within the scope of the present application.

[0141] The above-described embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the patent. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of the present application. Therefore, the scope of protection of the patent of the present application should be subject to the appended claims.

Claims

1. A pixel circuit, characterized by comprising: The pixel circuit comprises a first light emitting unit, a second light emitting unit, a first driving circuit and a second driving circuit, the first driving circuit is electrically connected with a first electrode of the first light emitting unit and is configured to generate a driving current for driving the first light emitting unit to emit light, the second driving circuit is electrically connected with a first electrode of the second light emitting unit and is configured to generate a driving current for driving the second light emitting unit to emit light, a power input end of the first driving circuit and a second electrode of the second light emitting unit are connected with a first power line respectively, a power input end of the second driving circuit and a second electrode of the first light emitting unit are connected with a second power line respectively, the first power line is used for providing a first power supply signal to the first driving circuit and the second light emitting unit respectively, and the second power line is used for providing a second power supply signal to the second driving circuit and the first light emitting unit respectively, the pixel circuit comprises a light emitting stage in a working process of one display frame, in the light emitting stage of the same display frame, the first power supply signal and the second power supply signal are configured to have high-low jumps in voltage with time, and the first light emitting unit and the second light emitting unit emit light alternately in the light emitting stage of the same display frame; the first driving circuit and the second driving circuit each comprise a data writing unit, a storage unit, a driving unit and a compensation unit, the data writing unit is connected with a first end of the driving unit, and is configured to write a data signal into the first end of the driving unit according to a first scanning signal; the storage unit is used for storing a voltage at a control end of the driving unit; the driving unit in the first driving circuit is connected between a power input end of the first driving circuit and a first electrode of the first light emitting unit, and the driving unit in the second driving circuit is connected between a power input end of the second driving circuit and a first electrode of the second light emitting unit; the driving unit is configured to generate a driving current according to a voltage at a control end of the driving unit; the compensation unit is connected between the control end of the driving unit and a second end of the driving unit, a control end of the data writing unit in the first driving circuit and a control end of the data writing unit in the second driving circuit are connected to a same first scanning line; the data writing unit in the first driving circuit and the data writing unit in the second driving circuit are connected to a same data line; a control end of the compensation unit in the first driving circuit and a control end of the compensation unit in the second driving circuit are connected to a same first scanning line; in the same pixel circuit, the data line simultaneously writes a same data voltage to the first driving circuit and the second driving circuit.

2. The pixel circuit of claim 1, wherein, the driving unit comprises a first transistor, a first electrode of the first transistor serves as a first end of the driving unit, a gate of the first transistor serves as a control end of the driving unit, and a second electrode of the first transistor serves as a second end of the driving unit. The data writing unit comprises a second transistor, a first electrode of the second transistor is connected with the control end of the driving unit, a gate electrode of the second transistor is connected with a first scanning line, and a second electrode of the second transistor is connected with a data line. The storage unit comprises a storage capacitor, a first end of the storage capacitor in the first driving circuit is connected with the first power supply line, a first end of the storage capacitor in the second driving circuit is connected with the second power supply line, a second end of the storage capacitor in the first driving circuit is connected with the control end of the driving unit, and a second end of the storage capacitor in the second driving circuit is connected with the control end of the driving unit.

3. The pixel circuit of claim 1, wherein, The compensation unit is configured to perform threshold compensation on the driving unit according to the first scanning signal.

4. The pixel circuit of claim 1, wherein, The first electrode of the first light emitting unit and the first electrode of the second light emitting unit are anodes, and the second electrode of the first light emitting unit and the second electrode of the second light emitting unit are cathodes.

5. The pixel circuit according to any one of claims 1 to 3, characterized by, The first driving circuit and the second driving circuit further comprise a first initialization unit and / or a second initialization unit, The first initialization unit in the first driving circuit is connected with the first electrode of the first light emitting unit, the first initialization unit in the second driving circuit is connected with the first electrode of the second light emitting unit, and the first initialization unit is configured to transmit an initialization signal to the light emitting unit connected therewith according to a second scanning signal to initialize the light emitting unit connected therewith; and / or, In the same driving circuit, the second initialization unit is connected with the control end of the driving unit and the storage unit respectively, and the second initialization unit is configured to transmit the initialization signal to the control end of the driving unit according to a third scanning signal to initialize the storage unit.

6. The pixel circuit of claim 5, wherein, The control end of the first initialization unit in the first driving circuit and the control end of the first initialization unit in the second driving circuit are connected to the same second scanning line.

7. The pixel circuit of claim 5, wherein, The control end of the second initialization unit in the first driving circuit and the control end of the second initialization unit in the second driving circuit are connected to the same third scanning line.

8. The pixel circuit of claim 5, wherein, The first initialization unit comprises a third transistor, in the same driving circuit, a first electrode of the third transistor is connected with the light emitting unit connected with the first initialization unit, a gate electrode of the third transistor is connected with a second scanning line, and a second electrode of the third transistor is connected with an initialization signal line.

9. The pixel circuit of claim 5, wherein, The second initialization unit comprises a fourth transistor, in the same driving circuit, a first electrode of the fourth transistor is connected with the control end of the driving unit and the storage unit respectively, a gate electrode of the fourth transistor is connected with a third scanning line, and a second electrode of the fourth transistor is connected with an initialization signal line.

10. The pixel circuit according to any one of claims 1 to 3, characterized by, In the light emitting stage, the first power supply signal and the second power supply signal are configured to have high and low jumps in voltage over time, and the voltage highs and lows of the two are opposite.

11. The pixel circuit according to any one of claims 1 to 3, characterized by, The first driving circuit and the second driving circuit further comprise a first light emitting control unit and / or a second light emitting control unit, The first light-emitting control unit in the first driving circuit is connected between the second end of the driving unit and the first electrode of the first light-emitting unit, the first light-emitting control unit in the second driving circuit is connected between the second end of the driving unit and the first electrode of the second light-emitting unit, and the first light-emitting control unit is configured to turn on or turn off the connection between the second end of the driving unit and the first electrode of the light-emitting unit connected with the first light-emitting control unit according to a light-emitting control signal; and / or, The second light-emitting control unit in the first driving circuit is connected between the first power supply line and the first end of the driving unit, the second light-emitting control unit in the second driving circuit is connected between the second power supply line and the first end of the driving unit, and the second light-emitting control unit is configured to turn on or turn off the connection between the power supply line connected with the second light-emitting control unit and the first end of the driving unit according to the light-emitting control signal.

12. The pixel circuit of claim 11, wherein, The control end of the first light-emitting control unit in the first driving circuit and the control end of the first light-emitting control unit in the second driving circuit are connected to the same control signal line.

13. The pixel circuit of claim 11, wherein, The control end of the second light-emitting control unit in the first driving circuit and the control end of the second light-emitting control unit in the second driving circuit are connected to the same control signal line.

14. The pixel circuit of claim 11, wherein, The first light-emitting control unit comprises a fifth transistor, in the same driving circuit, the first electrode of the fifth transistor is connected with the second end of the driving unit, the gate of the fifth transistor is connected with a control signal line, and the second electrode of the fifth transistor is connected with the first electrode of the light-emitting unit connected with the first light-emitting control unit.

15. The pixel circuit of claim 11, wherein, The second light-emitting control unit comprises a sixth transistor, in the same driving circuit, the first electrode of the sixth transistor is connected with the first end of the driving unit, the gate of the sixth transistor is connected with a control signal line, and the second electrode of the sixth transistor is connected with the power supply line connected with the second light-emitting control unit.

16. A pixel circuit, comprising: The first light-emitting unit, the second light-emitting unit, the first driving circuit and the second driving circuit are provided, the first driving circuit is electrically connected with the first electrode of the first light-emitting unit and is configured to generate a driving current for driving the first light-emitting unit to emit light, the second driving circuit is electrically connected with the first electrode of the second light-emitting unit and is configured to generate a driving current for driving the second light-emitting unit to emit light, The power input end of the first driving circuit and the second electrode of the second light-emitting unit are respectively connected with a first power supply line, the power input end of the second driving circuit and the second electrode of the first light-emitting unit are respectively connected with a second power supply line, the first power supply line is used for providing a first power supply signal to the first driving circuit and the second light-emitting unit respectively, and the second power supply line is used for providing a second power supply signal to the second driving circuit and the first light-emitting unit respectively, The pixel circuit comprises a light-emitting stage in a display frame, and in the light-emitting stage of the same display frame, the first power supply signal and the second power supply signal are configured to have high and low jumps in voltage over time, and the first light-emitting unit and the second light-emitting unit alternately emit light in the light-emitting stage of the same display frame. The first driving circuit and the second driving circuit each comprise a data writing unit, a storage unit and a driving unit, The data writing unit is connected to the control end of the driving unit, and the data writing unit is configured to write a data signal into the control end of the driving unit according to a first scanning signal; The storage unit is used to store the voltage at the control end of the driving unit; The driving unit in the first driving circuit is connected between the power input end of the first driving circuit and the first electrode of the first light-emitting unit, and the driving unit in the second driving circuit is connected between the power input end of the second driving circuit and the first electrode of the second light-emitting unit; the driving unit is configured to generate a driving current according to the voltage at the control end of the driving unit; The control end of the data writing unit in the first driving circuit and the control end of the data writing unit in the second driving circuit are connected to the same first scanning line; The data writing unit in the first driving circuit and the data writing unit in the second driving circuit are connected to the same data line; In the same pixel circuit, the data line simultaneously writes the same data voltage into the first driving circuit and the second driving circuit.

17. A display device comprising: The pixel circuit comprises a pixel circuit according to any one of claims 1 to 16.

18. The display device of claim 17, wherein, The pixel circuit comprises a plurality of pixel circuits arranged in an array.

19. The display device of claim 18, wherein, In the same pixel circuit, the first driving circuit and the second driving circuit are arranged in a row direction; the first driving circuit and the second driving circuit are connected to the same data line, and the data line extends in a column direction; and the row direction and the column direction intersect.

20. A driving method of a pixel circuit for driving the pixel circuit according to any one of claims 1 to 16, characterized by, The driving method comprises: In the light-emitting stage, the first power supply signal and the second power supply signal received by the pixel circuit are configured to have high and low jumps in voltage over time, so that the first light-emitting unit and the second light-emitting unit alternately emit light.

21. The driving method of the pixel circuit according to claim 20, wherein The pixel circuit comprises a pixel circuit according to any one of claims 1 to 16. The pixel circuit comprises a plurality of pixel circuits arranged in an array. In the same pixel circuit, the first driving circuit and the second driving circuit are arranged in a row direction; the first driving circuit and the second driving circuit are connected to the same data line, and the data line extends in a column direction; and the row direction and the column direction intersect. The driving method comprises: In the light-emitting stage, the first power supply signal and the second power supply signal received by the pixel circuit are configured to have high and low jumps in voltage over time, so that the first light-emitting unit and the second light-emitting unit alternately emit light. The pixel circuit comprises a pixel circuit according to any one of claims 1 to 16. The pixel circuit comprises a plurality of pixel circuits arranged in an array. In the same pixel circuit, the first driving circuit and the second driving circuit are arranged in a row direction; the first driving circuit and the second driving circuit are connected to the same data line, and the data line extends in a column direction; and the row direction and the column direction intersect. The driving method comprises: In the light-emitting stage, the first power supply signal and the second power supply signal received by the pixel circuit are configured to have high and low jumps in voltage over time, so that the first light-emitting unit and the second light-emitting unit alternately emit light. The pixel circuit comprises a pixel circuit according to any one of claims 1 to 16. The pixel circuit comprises a plurality of pixel circuits arranged in an array. In the same pixel circuit, the first driving circuit and the second driving circuit are arranged in a row direction; the first driving circuit and the second driving circuit are connected to the same data line, and the data line extends in a column direction; and the row direction and the column direction intersect. In the light emitting stage, the light emitting control signal is configured as a turn-on voltage, and the first scanning signal, the second scanning signal and the third scanning signal are configured as turn-off voltages.

22. The driving method of the pixel circuit according to claim 21, wherein In the data writing stage, the first power supply signal and the second power supply signal are the same, and the voltages of the first power supply signal and the second power supply signal in the data writing stage are equal to the voltage of the first power supply signal when the first light emitting unit emits light in the light emitting stage.

23. The driving method of the pixel circuit according to claim 21, wherein In the first initialization stage, the first power supply signal and the second power supply signal are the same, and the voltages of the first power supply signal and the second power supply signal in the first initialization stage are equal to the voltage of the first power supply signal when the first light emitting unit emits light in the light emitting stage.

24. The driving method of the pixel circuit according to claim 21, wherein In the second initialization stage, the first power supply signal and the second power supply signal are the same, and the voltages of the first power supply signal and the second power supply signal in the second initialization stage are equal to the voltage of the second power supply signal when the first light emitting unit emits light in the light emitting stage.

25. The driving method of the pixel circuit according to claim 21, wherein In the light emitting stage, the first power supply signal and the second power supply signal are configured as voltages that jump up and down with time, and the voltages of the first power supply signal and the second power supply signal are opposite to each other.

26. The driving method of the pixel circuit according to claim 22, wherein The voltage of the first power supply signal in the data writing stage is different from the voltage of the first power supply signal in the second initialization stage, and the voltage of the second power supply signal in the data writing stage is different from the voltage of the second power supply signal in the second initialization stage.

27. The driving method of the pixel circuit according to claim 22, wherein The voltage of the first power supply signal in the data writing stage is the same as the voltage of the first power supply signal in the first initialization stage, and the voltage of the second power supply signal in the data writing stage is the same as the voltage of the second power supply signal in the first initialization stage.

28. The driving method of the pixel circuit according to claim 23, wherein The voltage of the first power supply signal in the first initialization stage is different from the voltage of the first power supply signal in the second initialization stage, and the voltage of the second power supply signal in the first initialization stage is different from the voltage of the second power supply signal in the second initialization stage.

Images