Pixel circuit, display device, and electronic device

Abstract

The application discloses a pixel circuit, a display device and an electronic equipment. The pixel circuit comprises a light-emitting element, a driving module, a reset module, a first control module, a compensation module, an energy storage capacitor, a second control module and a third control module. In a normal display mode, the reset module resets the driving module, the energy storage capacitor and the light-emitting element respectively, the first control module, the second control module and the compensation module compensate the voltage of the control end of the driving module, and the driving module drives the light-emitting element to emit light. In a screen-off display mode, the reset module, the compensation module and the second control module are all closed, the first control module, the driving module and the third control module cooperate to drive the light-emitting element to emit light, the switching state of the reset module, the compensation module and the second control module is prevented from being frequently switched in the screen-off display mode, the power consumption of the pixel circuit is reduced, and the endurance time of the electronic equipment is prolonged.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of circuit, and particularly relates to a pixel circuit, a display device and an electronic device. BACKGROUND

[0002] With the rapid development of display technology, the active-matrix organic light emitting diode (AMOLED) has been widely applied in display devices. The AMOLED display screen usually has two display modes, i.e., normal display and always-on display (AOD). The always-on display mode refers to displaying time and unread message information in a small area of the AMOLED display screen after the electronic device is locked. The OLED in the non-display area of the AMOLED display screen is turned off, so that the AMOLED display screen can operate at a lower power consumption, and the user can quickly obtain information.

[0003] The existing AMOLED display screen uses the same pixel circuit to drive the OLED to emit light in the normal display mode and the always-on display mode. The existing pixel circuit can eliminate the problem of uneven OLED light emission in the normal display mode by switching the on and off states of multiple switching devices, so as to ensure the uniformity of the display brightness of the display screen. However, in the always-on display mode, since the display screen only occupies a small area, the OLED in the remaining large area is turned off, and the problem of uneven OLED light emission does not need to be considered. Therefore, the on and off states of the multiple switching devices in the existing pixel circuit are frequently switched in the always-on display mode, which results in a large power consumption of the pixel circuit and affects the endurance time of the electronic device. SUMMARY

[0004] The present application aims to provide a pixel circuit, a display device and an electronic device, and solve the problem that the switching devices in the existing pixel circuit frequently operate in the always-on display mode, and the power consumption of the pixel circuit is large.

[0005] To solve the above technical problems, the present application is implemented as follows:

[0006] In a first aspect, an embodiment of the present application provides a pixel circuit, comprising a light emitting element, a driving module, a reset module, a first control module, a compensation module, an energy storage capacitor, a second control module and a third control module.

[0007] The control end of the reset module is connected with the first scan signal input end and the second scan signal input end, respectively. The input end of the reset module is connected with the first reset signal transmission end and the second reset signal transmission end, respectively. The output end of the reset module is connected with the driving module, the energy storage capacitor and the light emitting element, respectively.

[0008] The control end of the first control module is connected with the third scan signal input end, the input end of the first control module is connected with the data signal transmission end, and the output end of the first control module is connected with the input end of the second control module and the input end of the third control module respectively.

[0009] The control end of the compensation module is connected with the second scan signal input end, the input end of the compensation module is connected with the driving module, and the output end of the compensation module is connected with the energy storage capacitor.

[0010] The control end of the second control module is connected with the first voltage transmission end, and the output end of the second control module is connected with the driving module.

[0011] The control end of the third control module is connected with the second voltage transmission end, and the output end of the third control module is connected with the driving module.

[0012] The control end of the driving module is connected with the switch signal input end, the input end of the driving module is connected with the driving voltage, the output end of the driving module is connected with the first end of the light emitting element, and the second end of the light emitting element is connected with the low-level power voltage.

[0013] In the normal display mode, the reset module resets the driving module, the energy storage capacitor and the light emitting element respectively, the first control module, the second control module and the compensation module compensate the voltage of the control end of the driving module, and the driving module drives the light emitting element to emit light.

[0014] In the screen-off display mode, the reset module, the compensation module and the second control module are all turned off, and the first control module, the driving module and the third control module cooperate to drive the light emitting element to emit light.

[0015] In the second aspect, the embodiments of the present application provide a display device, which comprises the pixel circuit of the first aspect.

[0016] In the third aspect, the embodiments of the present application provide an electronic device, which comprises the display device of the second aspect.

[0017] In the embodiment of the present application, the pixel circuit comprises a light emitting element, a driving module, a reset module, a first control module, a compensation module, an energy storage capacitor, a second control module and a third control module; in a normal display mode, the reset module resets the driving module, the energy storage capacitor and the light emitting element respectively, the first control module, the second control module and the compensation module compensate the voltage of the control end of the driving module, and the driving module drives the light emitting element to emit light; in an idle screen display mode, the reset module, the compensation module and the second control module are all closed, the first control module, the driving module and the third control module cooperate to drive the light emitting element to emit light, so as to avoid that the reset module resets the driving module, the energy storage capacitor and the light emitting element respectively in the idle screen display mode, and at the same time, the voltage of the control end of the driving module does not need to be compensated by the compensation module, and the light emitting element can be driven to emit light only by the first control module, the driving module and the third control module, so as to avoid frequent switching of the switching states of the reset module, the compensation module and the second control module in the idle screen display mode, reduce the power consumption of the pixel circuit and prolong the endurance time of the electronic equipment.

[0018] Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following and / or can be learned by practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0019] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, taken in conjunction with the accompanying drawings, in which:

[0020] Figure 1 is a circuit connection block diagram of a pixel circuit provided by an embodiment of the present application;

[0021] Figure 2 is a circuit schematic diagram of a first pixel circuit provided by an embodiment of the present application;

[0022] Figure 3 is a timing pulse diagram of a first scan signal, a second scan signal, a third scan signal, a switching signal, a first voltage signal and a second voltage signal in the first pixel circuit provided by an embodiment of the present application;

[0023] Figure 4 is a circuit schematic diagram of a second pixel circuit provided by an embodiment of the present application;

[0024] Figure 5 is a timing pulse diagram of a first scan signal, a second scan signal, a third scan signal, a switching signal, a first voltage signal and a second voltage signal in the second pixel circuit provided by an embodiment of the present application. DETAILED DESCRIPTION

[0025] Embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only, and are used only for the purpose of explaining the present application, and should not be understood as limiting the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0026] The terms "first", "second" in the description and claims of the present application can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specified and limited.

[0027] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood broadly, for example, can be fixedly connected, or can be detachably connected, or integrally connected; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium, or can be the communication inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0028] The pixel circuit provided by the embodiments of the present application will be described in detail below by combining the drawings, specific embodiments and application scenarios.

[0029] As Figure 1As shown, the embodiment of the present application provides a pixel circuit, which comprises a light emitting element 10, a driving module 20, a reset module 30, a first control module 40, a compensation module 50, an energy storage capacitor 60, a second control module 70 and a third control module 80; the control end of the reset module 30 is connected with a first scan signal input end Scan1[n-1] and a second scan signal input end Scan1[n] respectively, the input end of the reset module 30 is connected with a first reset signal transmission end VINIT1 and a second reset signal transmission end VINIT2 respectively, and the output end of the reset module 30 is connected with the driving module 20, the energy storage capacitor 60 and the light emitting element 10 respectively; the control end of the first control module 40 is connected with a third scan signal input end Scan2[n], the input end of the first control module 40 is connected with a data signal transmission end DATA, and the output end of the first control module 40 is connected with the input end of the second control module 70 and the input end of the third control module 80 respectively; the control end of the compensation module 50 is connected with the second scan signal input end Scan1[n], the input end of the compensation module 50 is connected with the driving module 20, and the output end of the compensation module 50 is connected with the energy storage capacitor 60; the control end of the second control module 70 is connected with a first voltage transmission end V1, and the output end of the second control module 70 is connected with the driving module 20; the control end of the third control module 80 is connected with a second voltage transmission end V2, and the output end of the third control module 80 is connected with the driving module 20; the control end of the driving module 20 is connected with a switch signal input end EM[n], the input end of the driving module 20 is connected with a driving voltage ELVDD, the output end of the driving module 20 is connected with the first end of the light emitting element 10, and the second end of the light emitting element 10 is connected with a low-level power voltage ELVSS; wherein in a normal display mode, the reset module 30 resets the driving module 20, the energy storage capacitor 60 and the light emitting element 10 respectively, the first control module 40, the second control module 70 and the compensation module 50 compensate the voltage of the control end of the driving module 20, and the driving module 20 drives the light emitting element 10 to emit light; in an off-screen display mode, the reset module 30, the compensation module 50 and the second control module 70 are all closed, and the first control module 40, the driving module 20 and the third control module 80 cooperate to drive the light emitting element 10 to emit light.

[0030] In the embodiment, N rows of pixel circuits can be installed on the same AMOLED display device, the first scan signal input end Scan1[n-1] represents the scan control signal input end of the n-1th row of pixel circuits, the second scan signal input end Scan1[n] represents the first scan control signal input end of the nth row of pixel circuits, the third scan signal input end Scan2[n] represents the second scan control signal input end of the nth row of pixel circuits, and the switch signal input end EM[n] represents the light-emitting switch control signal of the nth row of pixel circuits, wherein n can be any integer between 0 and N.

[0031] In the embodiment, the first reset signal, the second reset signal, the data signal, the first voltage and the second voltage can be stable voltage signals. The first reset signal and the second reset signal can be voltage signals between -2.5V and -3.5V.

[0032] In the embodiment, each pixel circuit is provided with one light-emitting element 10, the light-emitting element 10 is an organic light-emitting diode OLED, the first end of the light-emitting element 10 can be the anode of the organic light-emitting diode, and the second end of the light-emitting element 10 can be the cathode of the organic light-emitting diode.

[0033] In the embodiment, the first switch tube T1, the fifth switch tube T5 and the sixth switch tube T6 included in the driving module 20, the fourth switch tube T4 and the seventh switch tube T7 included in the reset module 30, the second switch tube T2 included in the first control module 40, the third switch tube T3 included in the compensation module 50, the eighth switch tube T8 included in the second control module 70 and the ninth switch tube T9 included in the third control module 80 are all P-type TFT tubes. The P-type TFT is a low-temperature polysilicon TFT. The low-temperature polysilicon TFT is characterized by high electron mobility.

[0034] In the embodiment, the P-type TFT is turned on when the gate of the P-type TFT is at a low level, and the P-type TFT is turned off when the gate of the P-type TFT is at a high level.

[0035] In the embodiment, the first switch tube T1, the second switch tube T2, the third switch tube T3, the fourth switch tube T4, the fifth switch tube T5, the sixth switch tube T6, the seventh switch tube T7, the eighth switch tube T8 and the ninth switch tube T9 can also be other types of switch tubes other than TFT tubes, such as MOS tubes.

[0036] In the embodiment of the present application, the pixel circuit comprises the light emitting element 10, the driving module 20, the reset module 30, the first control module 40, the compensation module 50, the energy storage capacitor 60, the second control module 70 and the third control module 80; in the normal display mode, the reset module 30 resets the driving module 20, the energy storage capacitor 60 and the light emitting element 10 respectively, the first control module 40, the second control module 70 and the compensation module 50 compensate the voltage of the control end of the driving module 20, and the driving module 20 drives the light emitting element 10 to emit light; in the screen-off display mode, the reset module 30, the compensation module 50 and the second control module 70 are all closed, the first control module 40, the driving module 20 and the third control module 80 cooperate to drive the light emitting element 10 to emit light, so that the reset module 30 does not reset the driving module 20, the energy storage capacitor 60 and the light emitting element 10 respectively in the screen-off display mode, and at the same time, the compensation module 50 does not compensate the voltage of the control end of the driving module 20, and the first control module 40, the driving module 20 and the third control module 80 can drive the light emitting element 10 to emit light, which avoids frequently switching the on-off states of the reset module 30, the compensation module 50 and the second control module 70 in the screen-off display mode, reduces the power consumption of the pixel circuit and prolongs the endurance time of the electronic equipment.

[0037] As Figure 2 and Figure 3As shown, in one embodiment, in the normal display mode, the first voltage transmission end V1 is controlled at low level, the second control module 70 is opened, the second voltage transmission end V2 is controlled at high level, and the third control module 80 is closed; at t1, the first scan signal input end Scan1[n-1] is controlled at low level, the second scan signal input end Scan1[n], the third scan signal input end Scan2[n] and the switch signal input end EM[n] are respectively controlled at high level, and the reset module 30 resets the driving module 20 and the energy storage capacitor 60; at t2, the second scan signal input end Scan1[n] and the third scan signal input end Scan2[n] are respectively controlled at low level, the first scan signal input end Scan1[n-1] and the switch signal input end EM[n] are respectively controlled at high level, the first control module 40, the second control module 70 and the compensation module 50 cooperate to compensate the voltage of the control end of the driving module 20, and the reset module 30 resets the light emitting element 10; at t3, the switch signal input end EM[n] is controlled at low level, the first scan signal input end Scan1[n-1], the second scan signal input end Scan1[n] and the third scan signal input end Scan2[n] are respectively controlled at high level, and the driving module 20 drives the light emitting element 10 to emit light.

[0038] In the embodiment, it should be noted that the first scan signal controls the fourth switch T4 in the reset module 30, the second scan signal controls the seventh switch T7 in the reset module 30 and the third switch T3 in the compensation module 50, the third scan signal controls the second switch T2 in the first control module 40, the first voltage controls the eighth switch T8 in the second control module 70, the second voltage controls the ninth switch T9 in the third control module 80, and the switch signal controls the fifth switch T5 and the sixth switch T6 in the driving module 20.

[0039] In the embodiment, in the case that the AMOLED display device is in the normal display mode, the first voltage transmission end V1 is continuously controlled at low level, and the eighth switch T8 is turned on; the second voltage transmission end V2 is continuously controlled at high level, and the ninth switch T9 is turned off.

[0040] At the time t1, the first scan signal input end Scan1[n-1] is controlled to be at low level, the fourth switch tube T4 is turned on, the second scan signal input end Scan1[n], the third scan signal input end Scan2[n] and the switch signal input end EM[n] are controlled to be at high level, the seventh switch tube T7, the second switch tube T2, the fifth switch tube T5 and the sixth switch tube T6 are turned off, the first reset voltage of the first reset signal transmission end VINIT1 is provided to the energy storage capacitor 60 and the gate of the first switch tube T1 through the fourth switch tube T4, and the first reset voltage of the first reset signal transmission end VINIT1 resets the energy storage capacitor 60 and the first switch tube T1 respectively, so that the reset module 30 resets the driving module 20 and the energy storage capacitor 60.

[0041] At the time t2, the second scan signal input end Scan1[n] is controlled to be at low level, the third switch tube T3 and the seventh switch tube T7 are turned on, the third scan signal input end Scan2[n] is controlled to be at low level, the second switch tube T2 is turned on, the first scan signal input end Scan1[n-1] is controlled to be at high level, the fourth switch tube T4 is turned off, the switch signal input end EM[n] is controlled to be at high level, and the fifth switch tube T5 and the sixth switch tube T6 are both turned off; at the time t1, since the reset voltage of the first reset signal transmission end VINIT1 is saved in the energy storage capacitor 60, and the reset voltage of the first reset signal transmission end VINIT1 is negative voltage, the first switch tube T1 still remains to be turned on, the data signal voltage of the data signal transmission end DATA connected with the source of the second switch tube T2 is provided to the energy storage capacitor 60 through the second switch tube T2, the eighth switch tube T8, the first switch tube T1 and the third switch tube T3, at this time, the gate voltage V g of the first switch tube T1 is data +V th , so that the threshold voltage V th of the first switch tube T1 is extracted, which provides a prerequisite for the compensation of the threshold voltage V th in the subsequent stage, so as to realize the compensation of the voltage of the control end of the driving module 20 by the cooperation of the first control module 40, the second control module 70 and the compensation module 50; at the same time, the seventh switch tube T7 is in the turned-on state, the reset voltage of the second reset signal transmission end VINIT2 connected with the source of the seventh switch tube T7 is provided to the light emitting element 10 through the seventh switch tube T7, the reset voltage of the second reset signal transmission end VINIT2 initializes the light emitting element 10, and clears the residual charge in the light emitting element 10, so as to realize the reset of the light emitting element 10 by the reset module 30.

[0042] At the moment t3, the switch signal input end EM[n] is controlled to be at low level, the fifth switch tube T5 and the sixth switch tube T6 are turned on respectively, the first scan signal input end Scan1[n-1], the second scan signal input end Scan1[n] and the third scan signal input end Scan2[n] are controlled to be at high level respectively, the fourth switch tube T4, the third switch tube T3, the seventh switch tube T7 and the second switch tube T2 are all turned off; and the first switch tube T1 still keeps on, the driving voltage ELVDD connected with the source electrode of the fifth switch tube T5 is provided to the anode of the light emitting element 10 through the fifth switch tube T5, the first switch tube T1 and the sixth switch tube T6, and flows into the low level power supply voltage ELVSS through the cathode of the light emitting element 10, so as to drive the light emitting element 10 to emit light, and realize that the driving module 20 drives the light emitting element 10 to emit light.

[0043] In the embodiment, the threshold voltage V th refers to the gate voltage value corresponding to the drain current of the first switch tube T1 reaching a certain value, that is, the Vgs voltage value required for the first switch tube T1 to open. data refers to the voltage of the data signal transmission end DATA.

[0044] As shown in Figure 2 , Figure 4 and Figure 5 , in the screen-off display mode, the switch signal input end EM[n] and the second voltage transmission end V2 are controlled to be at low level respectively, the driving module 20 and the third control module 80 are both opened, the first scan signal input end Scan1[n-1], the second scan signal input end Scan1[n] and the first voltage transmission end V1 are controlled to be at high level respectively, the reset module 30, the compensation module 50 and the second control module 70 are all closed; at the moment t1, the third scan signal input end Scan2[n] is controlled to be at low level, and the first control module 40 works; at the moment t2, the third scan signal input end Scan2[n] is controlled to be at high level, the first control module 40 is closed, and the driving module 20 and the third control module 80 cooperate to drive the light emitting element 10 to emit light.

[0045] In the embodiment, when the AMOLED display device is in the screen-off display mode, the switch signal input end EM[n] is continuously controlled to be in the low level state, so that the fifth switch tube T5 and the sixth switch tube T6 are continuously turned on, the second voltage transmission end V2 is continuously controlled to be in the low level state, so that the ninth switch tube T9 is continuously turned on; the first scan signal input end Scan1[n-1] is continuously controlled to be in the high level state, the fourth switch tube T4 is continuously turned off, the second scan signal input end Scan1[n] is continuously controlled to be in the high level state, the third switch tube T3 and the seventh switch tube T7 are continuously turned off, the first voltage transmission end V1 is continuously controlled to be in the high level state, and the eighth switch tube T8 is continuously turned off, Figure 2 The pixel circuit shown in the formula (1) can be equivalent to the pixel circuit shown in the formula (2). Figure 4 The pixel circuit shown in the formula (1) can be equivalent to the pixel circuit shown in the formula (2).

[0046] As shown in the formula (1) and the formula (2), in the embodiment, when the AMOLED display device is in the screen-off display mode, Figure 4 Figure 5 As shown in the formula (1) and the formula (2), in the embodiment, when the AMOLED display device is in the screen-off display mode,

[0047] At the t1 moment, the third scan signal input end Scan2[n] is controlled to be in the low level state, so that the second switch tube T2 is turned on, the data signal voltage of the data signal transmission end DATA connected with the source electrode of the second switch tube T2 is provided to the energy storage capacitor 60 through the second switch tube T2 and the ninth switch tube T9, and the data signal voltage of the data signal transmission end DATA is stored in the energy storage capacitor 60, so as to realize the data signal voltage of the data signal transmission end DATA written in the energy storage capacitor 60.

[0048] At the t2 moment, the third scan signal input end Scan2[n] is controlled to be in the high level state, so that the second switch tube T2 is turned off, the data signal voltage stored in the energy storage capacitor 60 flows to the gate electrode of the first switch tube T1 through the ninth switch tube T9, the conductive channel width of the first switch tube T1 is controlled, so as to control the size of the current flowing through the first switch tube T1; and since the fifth switch tube T5 and the sixth switch tube T6 are turned on respectively, the driving voltage ELVDD connected with the source electrode of the fifth switch tube T5 is provided to the anode of the light emitting element 10 through the fifth switch tube T5, the first switch tube T1 and the sixth switch tube T6, and flows through the cathode of the light emitting element 10 to flow into the low level power supply voltage ELVSS, so as to drive the light emitting element 10 to emit light, and realize the cooperation of the driving module 20 and the third control module 80 in driving the light emitting element 10 to emit light.

[0049] ​In the embodiment of the present application, when the AMOLED display device is in the screen-off display mode, only the second switch tube T2 is kept in operation to control the writing of the data signal voltage of the data signal transmission terminal DATA; at the same time, the magnitude of the current flowing through the light-emitting element 10 is controlled by the first switch tube T1, and the fifth switch tube T5, the sixth switch tube T6 and the ninth switch tube T9 are respectively in the on state, and the fourth switch tube T4, the third switch tube T3, the seventh switch tube T7 and the eighth switch tube T8 are all in the off state, thereby reducing unnecessary switching actions of the switch tubes, thereby reducing the power consumption of the display driver IC, and realizing an extremely low-power screen-off display mode.

[0050] In this embodiment, when the AMOLED display device is in the screen-off display mode, the frequent switching actions of the switch tube are effectively reduced, thereby increasing the service life of the switch tube.

[0051] like Figure 2 As shown, in one embodiment, the driving module 20 includes a first switching tube T1, a fifth switching tube T5 and a sixth switching tube T6; the control end of the first switching tube T1 is connected to the first end of the energy storage capacitor 60, and the second end of the energy storage capacitor 60 is connected to the driving voltage ELVDD; the control end of the fifth switching tube T5 is connected to the switching signal input end EM[n], the first end of the fifth switching tube T5 is connected to the driving voltage ELVDD, and the second end of the fifth switching tube T5 is connected to the first end of the first switching tube T1; the control end of the sixth switching tube T6 is connected to the switching signal input end EM[n], the first end of the sixth switching tube T6 is connected to the second end of the first switching tube T1, and the second end of the sixth switching tube T6 is connected to the first end of the light-emitting element 10.

[0052] In this embodiment, the driving module 20 controls whether current is supplied to the light-emitting element 10. When the first switch tube T1, the fifth switch tube T5, and the sixth switch tube T6 are all turned on, the driving voltage ELVDD supplies current to the light-emitting element 10 through the first switch tube T1, the fifth switch tube T5, and the sixth switch tube T6. When any of the first switch tube T1, the fifth switch tube T5, and the sixth switch tube T6 is turned off, no current is supplied to the light-emitting element 10.

[0053] In this embodiment, the first switch transistor T1 is a driving transistor for controlling the current flowing into the light emitting element 10 . The first switch transistor T1 controls the current of the driving voltage ELVDD applied to the light emitting element 10 in response to the voltage maintained at the energy storage capacitor 60 .

[0054] In this embodiment, during actual use, the gate of the first switching transistor T1 is connected to the first end of the energy storage capacitor 60, and the second end of the energy storage capacitor 60 is connected to the driving voltage ELVDD. The gates of the fifth switching transistor T5 and the sixth switching transistor T6 are respectively connected to the switching signal input terminal EM[n]. The source of the fifth switching transistor T5 is connected to the driving voltage ELVDD. The drain of the fifth switching transistor T5 is connected to the source of the first switching transistor T1, the drain of the first switching transistor T1 is connected to the source of the sixth switching transistor T6, the drain of the sixth switching transistor T6 is connected to the first end of the light-emitting element 10, and the second end of the light-emitting element 10 is connected to the low-level power supply voltage ELVSS. When the first switching transistor T1, the fifth switching transistor T5, and the sixth switching transistor T6 are respectively turned on, the driving voltage ELVDD can supply power to the light-emitting element 10 through the first switching transistor T1, the fifth switching transistor T5, and the sixth switching transistor T6.

[0055] like Figure 2 As shown, in one embodiment, the reset module 30 includes a fourth switch tube T4 and a seventh switch tube T7; the control end of the fourth switch tube T4 is connected to the first scan signal input end Scan1[n-1], the first end of the fourth switch tube T4 is connected to the first reset signal transmission end VINIT1, and the second end of the fourth switch tube T4 is connected to the first end of the energy storage capacitor 60; the control end of the seventh switch tube T7 is connected to the second scan signal input end Scan1[n], the first end of the seventh switch tube T7 is connected to the second reset signal transmission end VINIT2, and the seventh switch tube T7 is connected to the first end of the energy storage capacitor 60. The second end of is connected to the first end of the light-emitting element 10; wherein the fourth switch tube T4 is used to provide the reset voltage of the first reset signal transmission terminal VINIT1 to the first switch tube T1 and the energy storage capacitor 60 under the control of the first scan signal input terminal Scan1[n-1], so as to reset the first switch tube T1 and the energy storage capacitor 60 respectively; the seventh switch tube T7 is used to provide the reset voltage of the second reset signal transmission terminal VINIT2 to the light-emitting element 10 under the control of the second scan signal input terminal Scan1[n], so as to reset the light-emitting element 10.

[0056] In this embodiment, in actual use, the gate of the fourth switch tube T4 is connected to the first scan signal input terminal Scan1[n-1], the source of the fourth switch tube T4 is connected to the first reset signal transmission terminal VINIT1, and the drain of the fourth switch tube T4 is connected to the gate of the first switch tube T1 and the first end of the energy storage capacitor 60 respectively.

[0057] In this embodiment, when the first scan signal input terminal Scan1[n-1] is controlled to be at a low level, the fourth switch tube T4 is turned on, and the first reset voltage of the first reset signal transmission terminal VINIT1 is provided to the first switch tube T1 and the energy storage capacitor 60 through the fourth switch tube T4, so that the first reset voltage of the first reset signal transmission terminal VINIT1 can initialize the first switch tube T1 and the energy storage capacitor 60 respectively.

[0058] In this embodiment, in actual use, the gate of the seventh switch tube T7 is connected to the second scan signal input terminal Scan1[n], the source of the seventh switch tube T7 is connected to the second reset signal transmission terminal VINIT2, and the drain of the seventh switch tube T7 is connected to the anode of the light emitting element 10.

[0059] In this embodiment, when the second scan signal input terminal Scan1[n] is controlled to be at a low level, the seventh switch tube T7 is turned on, and the second reset voltage of the second reset signal transmission terminal VINIT2 is provided to the anode of the light-emitting element 10 through the seventh switch tube T7, so that the second reset voltage of the second reset signal transmission terminal VINIT2 can initialize the light-emitting element 10.

[0060] like Figure 2 As shown, in one embodiment, the first control module 40 includes a second switch tube T2; the control end of the second switch tube T2 is connected to the third scan signal input end Scan2[n], the first end of the second switch tube T2 is connected to the data signal transmission end DATA, and the second end of the second switch tube T2 is respectively connected to the first end of the second control module 70 and the first end of the third control module 80.

[0061] In this embodiment, in actual use, the gate of the second switch tube T2 is connected to the third scan signal input terminal Scan2[n], the source of the second switch tube T2 is connected to the data signal transmission terminal DATA, and the drain of the second switch tube T2 is connected to the source of the eighth switch tube T8 and the source of the ninth switch tube T9 respectively.

[0062] like Figure 2 As shown, in one embodiment, the compensation module 50 includes a third switch tube T3; the control end of the third switch tube T3 is connected to the second scan signal input end Scan1[n], the first end of the third switch tube T3 is connected to the second end of the first switch tube T1, and the second end of the third switch tube T3 is connected to the first end of the energy storage capacitor 60.

[0063] In this embodiment, in actual use, the gate of the third switch tube T3 is connected to the second scan signal input terminal Scan1[n], the source of the third switch tube T3 is connected to the drain of the first switch tube T1, and the drain of the third switch tube T3 is connected to the first end of the energy storage capacitor 60.

[0064] like Figure 2 As shown, in one embodiment, the second control module 70 includes an eighth switch tube T8; the control end of the eighth switch tube T8 is connected to the first voltage transmission end V1, the first end of the eighth switch tube T8 is connected to the second end of the second switch tube T2, and the second end of the eighth switch tube T8 is connected to the first end of the first switch tube T1.

[0065] In this embodiment, in actual use, the gate of the eighth switch tube T8 is connected to the first voltage transmission terminal V1, the source of the eighth switch tube T8 is connected to the drain of the second switch tube T2, and the drain of the eighth switch tube T8 is connected to the source of the first switch tube T1.

[0066] like Figure 2 As shown, in one embodiment, the third control module 80 includes a ninth switch tube T9; the control end of the ninth switch tube T9 is connected to the second voltage transmission end V2, the first end of the ninth switch tube T9 is connected to the second end of the second switch tube T2, and the second end of the ninth switch tube T9 is connected to the control end of the first switch tube T1.

[0067] In this embodiment, in actual use, the gate of the ninth switch tube T9 is connected to the second voltage transmission terminal V2, the source of the ninth switch tube T9 is connected to the drain of the second switch tube T2, and the drain of the ninth switch tube T9 is connected to the gate of the first switch tube T1.

[0068] An embodiment of the present application further provides a display device, which may include any pixel circuit provided in the embodiment of the present application.

[0069] In a specific implementation, the display device provided in the embodiment of the present application can be specifically referred to as an AMOLED display device. The AMOLED display device may include a plurality of pixel circuits distributed in an array, and may also include a control IC so that the control IC outputs a pixel driving signal (including a scanning control signal and a switching control signal) for each row of pixel circuits.

[0070] It should be noted that the AMOLED display device provided by the embodiments of the present application can be a display device with an LTPS AMOLED hard screen, a flexible screen or a folding screen, or a display device with a Low Temperature Polycrystalline Oxide (LTPO) AMOLED pixel driving circuit, that is, the pixel driving circuit in the AMOLED display device includes an LTPO NMOS tube.

[0071] In the AMOLED display device provided by the embodiments of the present application, a pixel circuit with simple structure and simple control logic is configured, which includes a light emitting element, a driving module, a reset module, a first control module, a compensation module, an energy storage capacitor, a second control module and a third control module; in a normal display mode, the reset module resets the driving module, the energy storage capacitor and the light emitting element respectively, the first control module, the second control module and the compensation module compensate the voltage of the control end of the driving module, and the driving module drives the light emitting element to emit light; in a screen-off display mode, the reset module, the compensation module and the second control module are all closed, the first control module, the driving module and the third control module cooperate to drive the light emitting element to emit light, so as to avoid that the reset module resets the driving module, the energy storage capacitor and the light emitting element respectively in the screen-off display mode, and at the same time, the voltage of the control end of the driving module does not need to be compensated by the compensation module, and the light emitting element can be driven to emit light only by the first control module, the driving module and the third control module, so as to avoid frequent switching of the switching states of the reset module, the compensation module and the second control module in the screen-off display mode, reduce the power consumption of the pixel circuit and prolong the endurance time of the electronic device.

[0072] The embodiments of the present application further provide an electronic device including the pixel circuit provided by the above embodiments.

[0073] In the embodiments of the present application, the electronic device can be a computer, a mobile phone, a tablet computer, a laptop computer, a personal digital assistant (PDA), a mobile Internet device (MID), a wearable device, an e-reader, a navigator, a digital camera or other electronic devices with an AMOLED display device.

[0074] In the embodiment, since the electronic device provided by the embodiment of the application comprises any one of the pixel circuits provided by the pixel circuit embodiment part, the electronic device provided by the embodiment of the application can realize the same functions as any one of the pixel circuits provided by the pixel circuit embodiment part.

[0075] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0076] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made thereto without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A pixel circuit, characterized in that: It includes a light-emitting element, a driving module, a reset module, a first control module, a compensation module, an energy storage capacitor, a second control module and a third control module; The control end of the reset module is connected to the first scan signal input end and the second scan signal input end respectively, the input end of the reset module is connected to the first reset signal transmission end and the second reset signal transmission end respectively, and the output end of the reset module is connected to the driving module, the energy storage capacitor and the light-emitting element respectively; The control end of the first control module is connected to the third scan signal input end, the input end of the first control module is connected to the data signal transmission end, and the output end of the first control module is connected to the input end of the second control module and the input end of the third control module respectively; The control end of the compensation module is connected to the second scanning signal input end, the input end of the compensation module is connected to the driving module, and the output end of the compensation module is connected to the energy storage capacitor; The control end of the second control module is connected to the first voltage transmission end, and the output end of the second control module is connected to the driving module; The control end of the third control module is connected to the second voltage transmission end, and the output end of the third control module is connected to the driving module; The driving module includes a first switching tube, a fifth switching tube, and a sixth switching tube, wherein the control end of the fifth switching tube is connected to the switching signal input end, the control end of the sixth switching tube is connected to the switching signal input end, the output end of the second control module is connected to the first end of the first switching tube, and the output end of the third control module is connected to the control end of the first switching tube; The input end of the driving module is connected to the driving voltage, the output end of the driving module is connected to the first end of the light-emitting element, and the second end of the light-emitting element is connected to the low-level power supply voltage; Wherein, in the normal display mode, the third control module is turned off, the reset module resets the driving module, the energy storage capacitor and the light-emitting element respectively, the first control module, the second control module and the compensation module compensate the voltage of the control end of the first switch tube of the driving module, and the driving module drives the light-emitting element to emit light; In the screen-off display mode, the reset module, the compensation module and the second control module are all turned off, and the first control module, the driving module and the third control module cooperate to drive the light-emitting element to emit light.

2. The pixel circuit according to claim 1, wherein: In the normal display mode, the first voltage transmission terminal is controlled to be at a low level, the second control module is turned on, the second voltage transmission terminal is controlled to be at a high level, and the third control module is turned off; At time t1, the first scan signal input terminal is controlled to be at a low level, the second scan signal input terminal, the third scan signal input terminal and the switch signal input terminal are respectively controlled to be at a high level, and the reset module resets the driving module and the energy storage capacitor; At time t2, the second scan signal input terminal and the third scan signal input terminal are respectively controlled to be at a low level, the first scan signal input terminal and the switch signal input terminal are respectively controlled to be at a high level, the first control module, the second control module and the compensation module cooperate to compensate the voltage at the control terminal of the first switch tube of the driving module, and the reset module resets the light-emitting element; At time t3, the switch signal input terminal is controlled to be at a low level, the first scan signal input terminal, the second scan signal input terminal and the third scan signal input terminal are respectively controlled to be at a high level, and the driving module drives the light-emitting element to emit light.

3. The pixel circuit according to claim 1, wherein: In the screen-off display mode, the switch signal input terminal and the second voltage transmission terminal are respectively controlled to be at a low level, the driving module and the third control module are both turned on, the first scan signal input terminal, the second scan signal input terminal and the first voltage transmission terminal are respectively controlled to be at a high level, and the reset module, the compensation module and the second control module are all turned off; At time t1, the third scanning signal input terminal is controlled to be at a low level, and the first control module is in operation; At time t2, the third scanning signal input terminal is controlled to be at a high level, the first control module is turned off, and the driving module and the third control module cooperate to drive the light-emitting element to emit light.

4. The pixel circuit according to claim 1, wherein: The control end of the first switch tube is connected to the first end of the energy storage capacitor, and the second end of the energy storage capacitor is connected to the driving voltage; The first end of the fifth switch tube is connected to the driving voltage, and the second end of the fifth switch tube is connected to the first end of the first switch tube; The first end of the sixth switch tube is connected to the second end of the first switch tube, and the second end of the sixth switch tube is connected to the first end of the light emitting element.

5. The pixel circuit according to claim 4, wherein: The reset module includes a fourth switch tube and a seventh switch tube; The control end of the fourth switch tube is connected to the first scan signal input end, the first end of the fourth switch tube is connected to the first reset signal transmission end, and the second end of the fourth switch tube is connected to the first end of the energy storage capacitor; The control end of the seventh switch tube is connected to the second scan signal input end, the first end of the seventh switch tube is connected to the second reset signal transmission end, and the second end of the seventh switch tube is connected to the first end of the light-emitting element; The fourth switch tube is used to provide the reset voltage of the first reset signal transmission end to the first switch tube and the energy storage capacitor under the control of the first scan signal input end, thereby resetting the first switch tube and the energy storage capacitor respectively; The seventh switching tube is used to provide the reset voltage of the second reset signal transmission end to the light emitting element under the control of the second scan signal input end, so as to reset the light emitting element.

6. The pixel circuit according to claim 4, wherein: The first control module includes a second switch tube; The control end of the second switch tube is connected to the third scan signal input end, the first end of the second switch tube is connected to the data signal transmission end, and the second end of the second switch tube is respectively connected to the first end of the second control module and the first end of the third control module.

7. The pixel circuit according to claim 4, wherein: The compensation module includes a third switch tube; The control end of the third switch tube is connected to the second scan signal input end, the first end of the third switch tube is connected to the second end of the first switch tube, and the second end of the third switch tube is connected to the first end of the energy storage capacitor.

8. The pixel circuit according to claim 6, wherein: The second control module includes an eighth switch tube; The control end of the eighth switch tube is connected to the first voltage transmission end, the first end of the eighth switch tube is connected to the second end of the second switch tube, and the second end of the eighth switch tube is connected to the first end of the first switch tube.

9. The pixel circuit according to claim 6, wherein: The third control module includes a ninth switch tube; The control end of the ninth switch tube is connected to the second voltage transmission end, the first end of the ninth switch tube is connected to the second end of the second switch tube, and the second end of the ninth switch tube is connected to the control end of the first switch tube.

10. A display device, characterized in that: The method comprises the pixel circuit according to any one of claims 1 to 9.

11. An electronic device, characterized in that: The display device according to claim 10 is included.

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