Pixel circuit, display module and electronic equipment

Abstract

The invention discloses a pixel circuit, a display module and electronic equipment, and relates to the technical field of display, and the pixel circuit comprises a reset module which is used for resetting a data writing module according to a reset signal. And the data writing module is used for writing and storing data voltage according to the data signal. The light-emitting module is used for emitting light according to the data voltage. The voltage stabilizing module is used for stabilizing the voltage of the data writing module; and / or the voltage stabilizing module is used for stabilizing the voltage of the reset module. Based on the scheme of the invention, when the voltage difference between the data writing module or the reset module and the light-emitting control node (namely the data voltage) of the light-emitting module is large, voltage stabilization can be performed on the data writing module or the reset module, so that the electric leakage condition of the light-emitting control node is reduced, the flicker phenomenon of a display screen is reduced, and the user experience is improved.

Description

Technical Field

[0001] This application relates to the field of display technology, specifically to a pixel circuit, a display module, and an electronic device. Background Technology

[0002] With the continuous advancement of technology, electronic devices are increasingly integrated into people's daily lives. Examples include mobile phones, tablets, and laptops. For ease of viewing, most electronic devices use light-emitting displays (OLEDs) to display content. The brightness of an OLED display is controlled by the amount of current flowing through it; for example, an OLED display can be an organic light-emitting display.

[0003] The current flowing through a backlit display screen is generally controlled by the voltage of the backlit control node in the pixel circuit. However, during the operation of the pixel circuit, when a large voltage difference occurs between the backlit control node and adjacent nodes, leakage may occur in the backlit control node, which can lead to flickering on the display panel of the backlit display screen and affect the user's experience of using the electronic device.

[0004] Therefore, a new solution is urgently needed to address the aforementioned problems. Summary of the Invention

[0005] This application provides a pixel circuit, a display module, and an electronic device. By adding a voltage regulator module, the voltage difference between the light-emitting control node and adjacent nodes in the pixel circuit is reduced, thereby reducing leakage at the light-emitting control node, reducing screen flicker, and improving user experience.

[0006] To achieve the above objectives, this application adopts the following technical solution:

[0007] Firstly, a pixel circuit is provided, including a reset module, a data writing module, a light-emitting module, and a voltage regulator module. The reset module is used to reset the data writing module according to a reset signal. A first terminal of the data writing module is connected to a first terminal of the reset module, and a second terminal of the data writing module is connected to the light-emitting module; the data writing module is used to write and store a data voltage according to a data signal. The light-emitting module is used to emit light according to the data voltage. A first terminal of the voltage regulator module is connected to a third terminal of the data writing module, and the voltage regulator module is used to regulate the voltage of the data writing module; and / or, a second terminal of the voltage regulator module is connected to a second terminal of the reset module, and the voltage regulator module is used to regulate the voltage of the reset module.

[0008] In this embodiment, during the operation of the pixel circuit, the data writing module is first reset by the reset module according to the reset signal. Then, the data writing module writes and stores the data voltage according to the data signal. Simultaneously, the voltage is regulated by the voltage regulator module to reduce the voltage difference between the data writing module or the reset module and the light-emitting control node (i.e., the data voltage) of the light-emitting module, reducing leakage at the light-emitting control node. Finally, the light-emitting module emits light according to the data voltage, thereby effectively reducing screen flicker and improving the user experience.

[0009] In conjunction with the first aspect, in some implementations of the first aspect, the voltage regulator module includes a semiconductor transistor, the control terminal of the semiconductor transistor is connected to the data writing module, the first electrode of the semiconductor transistor is connected to the data writing module, and the second electrode of the semiconductor transistor is connected to the reset module.

[0010] In this implementation, the data writing module and the reset module are connected by a semiconductor transistor, which reduces the external leakage current of the data writing module and the reset module, reduces the voltage difference between the data writing module and the reset module and the light-emitting control node (i.e., data voltage) of the light-emitting module, and reduces the leakage voltage of the light-emitting control node, thereby reducing the flickering phenomenon of the display screen.

[0011] In conjunction with the first aspect, in some implementations of the first aspect, the voltage regulator module further includes a first voltage regulator capacitor, the first substrate of the first voltage regulator capacitor is connected to the data writing module, and the second plate of the first voltage regulator capacitor is connected to a constant voltage.

[0012] In this implementation, the voltage difference between the data writing module and the light-emitting control node (i.e., data voltage) is reduced by the voltage stabilization effect of the first voltage stabilizing capacitor, thereby reducing leakage current in the light-emitting control node and reducing screen flickering.

[0013] In conjunction with the first aspect, in some implementations of the first aspect, the voltage regulator module further includes a second voltage regulator capacitor, the first substrate of the second voltage regulator capacitor is connected to the reset module, and the second plate of the second voltage regulator capacitor is connected to a constant voltage.

[0014] In this implementation, the voltage difference between the reset module and the light-emitting control node (i.e., data voltage) is reduced by the voltage stabilization effect of the second voltage-stabilizing capacitor, thereby reducing the leakage of the light-emitting control node and thus reducing the flickering phenomenon of the display screen.

[0015] In conjunction with the first aspect, in some implementations of the first aspect, the voltage regulator module further includes a first voltage regulator capacitor and a second voltage regulator capacitor. The first substrate of the first voltage regulator capacitor is connected to the data writing module, and the second plate of the first voltage regulator capacitor is connected to a constant voltage. The first substrate of the second voltage regulator capacitor is connected to the reset module, and the second plate of the second voltage regulator capacitor is connected to a constant voltage.

[0016] In this implementation, the voltage difference between the data writing module and the light-emitting control node (i.e., the data voltage) is reduced by the voltage stabilization effect of the first voltage-stabilizing capacitor. Similarly, the voltage difference between the reset module and the light-emitting control node (i.e., the data voltage) is reduced by the voltage stabilization effect of the second voltage-stabilizing capacitor. This reduces leakage current in the light-emitting control node, thereby reducing screen flicker.

[0017] In conjunction with the first aspect, in some implementations of the first aspect, the semiconductor transistor includes one or more of MOSFET, triode, and TFT.

[0018] In this implementation, depending on the actual circuit conditions, the semiconductor crystal can be selected from one or more of MOSFET, transistor, and TFT.

[0019] In conjunction with the first aspect, in some implementations of the first aspect, the voltage regulator module includes a third voltage regulator capacitor, the first substrate of the third voltage regulator capacitor is connected to the data writing module, and the second plate of the third voltage regulator capacitor is connected to a constant voltage.

[0020] In this implementation, the voltage of the data writing module is stabilized by the voltage stabilizing effect of the third voltage stabilizing capacitor, reducing the voltage difference between the data writing module and the light-emitting control node (i.e., data voltage), thereby reducing leakage of the light-emitting control node, and thus reducing the flickering phenomenon of the display screen and improving the user experience.

[0021] In conjunction with the first aspect, in some implementations of the first aspect, the voltage regulator module includes a fourth voltage regulator capacitor, the first substrate of the fourth voltage regulator capacitor is connected to the reset module, and the second plate of the fourth voltage regulator capacitor is connected to a constant voltage.

[0022] In this implementation, the voltage of the reset module is stabilized by the voltage stabilizing effect of the fourth voltage stabilizing capacitor, which reduces the voltage difference between the reset module and the light-emitting control node (i.e., data voltage), thereby reducing leakage current in the light-emitting control node and thus reducing the flickering phenomenon of the display screen.

[0023] In conjunction with the first aspect, in some implementations of the first aspect, the voltage regulator module further includes a third voltage regulator capacitor and a fourth voltage regulator capacitor. The first substrate of the third voltage regulator capacitor is connected to the data writing module, and the second plate of the third voltage regulator capacitor is connected to a constant voltage. The first substrate of the fourth voltage regulator capacitor is connected to the reset module, and the second plate of the fourth voltage regulator capacitor is connected to a constant voltage.

[0024] In this implementation, the third voltage-stabilizing capacitor stabilizes the voltage of the data writing module, reducing the voltage difference between the data writing module and the light-emitting control node (i.e., the data voltage). The fourth voltage-stabilizing capacitor stabilizes the voltage of the reset module, reducing the voltage difference between the reset module and the light-emitting control node (i.e., the data voltage). Thus, the third and fourth voltage-stabilizing capacitors simultaneously reduce leakage current in the light-emitting control node, thereby reducing screen flicker and improving the user experience.

[0025] In conjunction with the first aspect, in some implementations of the first aspect, the reset module includes a 51st TFT and a 52nd TFT, the gate of the 51st TFT and the gate of the 52nd TFT are both connected to a first scan signal, the drain of the 51st TFT is connected to a data writing module, the source of the 51st TFT is connected to the drain of the 52nd TFT, and the source of the 52nd TFT is connected to a first reset signal.

[0026] In this implementation, the 51st TFT and the 52nd TFT form a reset module, and the first scan signal serves as a reset switch signal. When the 51st TFT and the 52nd TFT receive the first scan signal, they are turned on, so that the first reset signal is sent to the data writing module to reset the data writing module.

[0027] In conjunction with the first aspect, in some implementations of the first aspect, the data writing module includes a second TFT, a third TFT, a forty-first TFT, a forty-second TFT, and a first capacitor; the gates of the second TFT, the forty-first TFT, and the forty-second TFT are all connected to a second scan signal; the source of the second TFT is connected to a data signal; the drain of the second TFT is connected to the source of the third TFT; the drain of the third TFT is connected to the source of the forty-first TFT; the drain of the forty-first TFT is connected to the source of the forty-second TFT; the drain of the forty-second TFT and the first plate of the first capacitor are both connected to a reset module; and the second plate of the first capacitor is connected to a constant voltage.

[0028] In this implementation, the second scan signal serves as a data write switch signal. When the second TFT, the forty-first TFT, and the forty-second TFT receive the second scan signal, they are turned on to write the data signal into the data write module. The gate and source of the third TFT are turned on after receiving the data voltage, and the data voltage is stored through the first capacitor.

[0029] In conjunction with the first aspect, in some implementations of the first aspect, the light-emitting module includes a first TFT, a sixth TFT, a seventh TFT, and a first diode; the source of the first TFT is connected to a constant voltage, the drain of the first TFT is connected to a data writing module, and the gates of the first TFT and the sixth TFT are both connected to a light-emitting control signal; the source of the sixth TFT is connected to the data writing module, the drain of the sixth TFT is connected to the drain of the seventh TFT and the positive terminal of the first diode, the source of the seventh TFT is connected to a second reset signal, the gate of the seventh TFT is connected to a reset switch signal, and the negative terminal of the first diode is grounded.

[0030] In this implementation, when the seventh TFT receives a reset switch signal, it can reset the first diode via a second reset signal to restore the first diode to its initial state. Then, when the first TFT and the sixth TFT receive a light emission control signal, they are turned on, thereby sending a constant voltage through the first TFT, the third TFT, and the sixth TFT to the first diode to emit light.

[0031] Secondly, a display module is provided, including a controller and a pixel circuit. The controller is connected to the pixel circuit and is used to control the pixel circuit to emit light.

[0032] In this embodiment, the controller is used to output a reset signal, a data write signal, and a light emission control signal, so that the pixel circuit can complete the light emission process.

[0033] Thirdly, an electronic device is provided, including a power module and a display module; the power module is connected to the display module and is used to supply power to the display module.

[0034] In this embodiment, the power module is used to supply power to the display module so that the display module can perform the display function. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of a scenario for an electronic device to which an embodiment of this application is applicable;

[0036] Figure 2 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application;

[0037] Figure 3 This is a schematic diagram of the structure of a liquid crystal display provided in an embodiment of this application;

[0038] Figure 4 This is a circuit diagram of a pixel circuit module provided in an embodiment of this application;

[0039] Figure 5 This is a timing diagram of a pixel circuit module provided in an embodiment of this application;

[0040] Figure 6 This is a leakage path diagram of a pixel circuit module provided in an embodiment of this application;

[0041] Figure 7 This is a schematic diagram of the structure of a pixel circuit provided in an embodiment of this application;

[0042] Figure 8 A circuit diagram of a pixel circuit provided in an embodiment of this application;

[0043] Figure 9 A circuit diagram of a pixel circuit provided in yet another embodiment of this application;

[0044] Figure 10 A circuit diagram of a pixel circuit provided in yet another embodiment of this application;

[0045] Figure 11 A circuit diagram of a pixel circuit provided in yet another embodiment of this application;

[0046] Figure 12 A circuit diagram of a pixel circuit provided in yet another embodiment of this application;

[0047] Figure 13 A circuit diagram of a pixel circuit provided in yet another embodiment of this application;

[0048] Figure 14 This is a circuit diagram of a pixel circuit provided in another embodiment of this application. Detailed Implementation

[0049] The technical solutions in the embodiments of this application will be clearly and thoroughly described below with reference to the accompanying drawings. In the description of the embodiments of this application, unless otherwise stated, " / " means "or," for example, A / B can mean A or B; the word "and / or" in the text is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone.

[0050] The terms "first," "second," etc., are used for descriptive purposes only and should not be construed as implying or suggesting relative importance or implicitly indicating the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of this application, unless otherwise stated, "multiple" means two or more.

[0051] To facilitate understanding of the embodiments of this application, the relevant concepts involved in the embodiments of this application will be briefly explained first.

[0052] 1. Organic light-emitting display (OLED).

[0053] In the display field, OLED is also known as organic electroluminescent display or organic light-emitting semiconductor. OLED is a type of current-driven organic light-emitting device. OLED emits light through the injection and recombination of charge carriers, and its luminous intensity is directly proportional to the injected current. Specifically, under the influence of an electric field, holes generated at the anode and electrons generated at the cathode of the OLED move and are injected into the hole transport layer and electron transport layer, respectively, before migrating to the light-emitting layer. When these two elements meet in the light-emitting layer, they generate excitons, which excite the light-emitting molecules, ultimately producing visible light.

[0054] 2. Thin film transistor (TFT).

[0055] In the display field, TFT refers to a technology used in liquid crystal displays (LCDs). Specifically, a thin-film transistor (TFT) is placed behind each pixel in an LCD. The switching state of each TFT determines whether that pixel displays brightness and color. The LCD's controller controls the switching of each TFT, thereby controlling the brightness and color of the entire display screen, achieving high-speed, high-brightness, and high-contrast display of screen information. Currently, TFT displays are the mainstream display devices in various laptops and desktop computers, and are a type of active-matrix liquid crystal display.

[0056] 3. Pixel circuit.

[0057] In the display field, pixel circuits are the fundamental units of display technology, determining the image quality and performance of display devices. The basic function of a pixel circuit is to store pixel data and control pixel illumination based on this data. In a display array, each pixel circuit typically contains a switching transistor and a storage capacitor, responsible for controlling the pixel's brightness and grayscale. Pixel circuits are primarily used in the control circuits of monitors, televisions, mobile devices, and panels.

[0058] 4. Metal-oxide-semiconductor field-effect transistor (MOSFET).

[0059] In the field of circuits, a MOSFET refers to a voltage-driven semiconductor device. A MOSFET typically has three electrodes: a gate (G), a source (S), and a drain (D). Based on their semiconductor structure, MOSFETs can be classified into PMOSFETs and NMOSFETs. In general electronic circuits, MOSFETs are commonly used in amplifier circuits or switching circuits. As a voltage-controlled element, a MOSFET allows current to flow through its source and drain when the voltage applied to its gate exceeds a preset value. For example, when the voltage received at the gate of an NMOSFET is greater than a preset value, the source and drain of the NMOSFET conduct; when the voltage received at the gate of an NMOSFET is not greater than the preset value, the source and drain of the NMOSFET are cut off. Similarly, when the voltage received at the gate of a PMOSFET is less than a preset value, the source and drain of the PMOSFET conduct; when the voltage received at the gate of a PMOSFET is not less than the preset value, the source and drain of the PMOSFET are cut off.

[0060] 5. Semiconductor transistor.

[0061] In the field of circuits, a semiconductor transistor, also known as a semiconductor triode, is a semiconductor device containing two internal PN junctions and typically three external electrodes. It is one of the most important fundamental components in modern electronics, possessing the functions of current control and amplification. Examples include TFTs and MOSFETs.

[0062] The above is a brief introduction to the terms used in the embodiments of this application, and will not be repeated below.

[0063] The following is combined Figures 1 to 3 First, the application scenarios and the structure of the electronic devices used in the embodiments of this application will be introduced.

[0064] Figure 1 This is a schematic diagram of a scenario for an electronic device to which an embodiment of this application applies.

[0065] like Figure 1As shown, users can communicate with base station 20 using electronic device 10. This application does not specifically limit the type of electronic device 10. In some specific embodiments, electronic device 10 can be a mobile phone, wearable device (e.g., smart bracelet, smartwatch, earphones, etc.), tablet computer, laptop computer, handheld computer, ultra-mobile personal computer (UMPC), cellular phone, personal digital assistant (PDA), augmented reality (AR) / virtual reality (VR) device, or other IoT (Internet of Things) devices, as well as devices such as televisions, large screens, printers, and projectors. For ease of understanding, the following embodiments use a mobile phone as an example for illustrative purposes.

[0066] Figure 2 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application.

[0067] like Figure 2 As shown in the embodiments of this application, the electronic device 10 may include a processor 110, an external memory interface 120, an internal memory 121, a universal serial bus (USB) interface 130, a charging management module 140, a power management module 141, a battery 142, a first antenna 151, a second antenna 161, a mobile communication module 150, a wireless communication module 160, an audio module 170, a speaker 170A, a receiver 170B, a microphone 170C, a headphone jack 170D, a sensor module 180, a button 190, a motor 191, an indicator 192, a camera 193, a display screen 194, and a subscriber identification module (SIM) card interface 195, etc. The sensor module 180 may include a pressure sensor 180A, a gyroscope sensor 180B, a barometric pressure sensor 180C, a magnetic sensor 180D, an accelerometer sensor 180E, a distance sensor 180F, a proximity sensor 180G, a fingerprint sensor 180H, a temperature sensor 180J, a touch sensor 180K, an ambient light sensor 180L, a bone conduction sensor 180M, etc.

[0068] It should be noted that, Figure 2 The structure shown does not constitute a specific limitation on the electronic device 10. In other embodiments of this application, the electronic device 10 may include a larger... Figure 2The components shown may include more or fewer components, or the electronic device 10 may include... Figure 2 The components shown may be a combination of certain components, or the electronic device 10 may include... Figure 2 Sub-components of some of the components shown. Figure 2 The components shown can be implemented in hardware, software, or a combination of both.

[0069] Processor 110 may include one or more processing units. For example, processor 110 may include at least one of the following processing units: application processor (AP), modem processor, graphics processing unit (GPU), image signal processor (ISP), controller, video codec, digital signal processor (DSP), baseband processor, and neural network processing unit (NPU). These different processing units may be independent devices or integrated devices. The controller can generate operation control signals based on instruction opcodes and timing signals to control instruction fetching and execution.

[0070] The processor 110 may also include a memory for storing instructions and data. In some embodiments, the memory in the processor 110 is a cache memory. This memory can store instructions or data that the processor 110 has just used or that are used repeatedly. If the processor 110 needs to use the instruction or data again, it can retrieve it directly from the memory. This avoids repeated accesses, reduces the waiting time of the processor 110, and thus improves the efficiency of the system.

[0071] In some embodiments, processor 110 may include one or more interfaces. For example, processor 110 may include at least one of the following interfaces: an inter-integrated circuit (I2C) interface, an inter-integrated circuit sound (I2S) interface, a pulse code modulation (PCM) interface, a universal asynchronous receiver / transmitter (UART) interface, a mobile industry processor interface (MIPI), a general-purpose input / output (GPIO) interface, a SIM interface, and a USB interface.

[0072] USB interface 130 is used to connect with other devices, thereby enabling electronic device 10 to communicate with the outside world or charge, etc. For example, it supports more than 10 charging protocols, On-the-Go (OTG) USB functionality, analog headset functionality, digital headset functionality, and display port (DP) functionality, etc. For example, USB interface 130 can be a Type-C interface.

[0073] Figure 2 The connection relationships between the modules shown are merely illustrative and do not constitute a limitation on the connection relationships between the modules of the electronic device 10. Optionally, the modules of the electronic device 10 may also adopt a combination of various connection methods described in the above embodiments.

[0074] The charging management module 140 receives power from the charger. While charging the battery 142, the charging management module 140 can also power electronic devices via the power management module 141. The power management module 141 connects the battery 142, the charging management module 140, and the processor 110. The power management module 141 receives input from the battery 142 and / or the charging management module 140, and powers the processor 110, internal memory 121, display screen 194, camera 193, and wireless communication module 160, etc. The power management module 141 can also monitor parameters such as battery capacity, battery cycle count, and battery health status (e.g., leakage current, impedance). Optionally, the power management module 141 can be located within the processor 110, or the power management module 141 and the charging management module 140 can be located in the same device.

[0075] The wireless communication function of electronic device 10 can be implemented through devices such as a first antenna 151, a second antenna 161, a mobile communication module 150, a wireless communication module 160, a modem processor, and a baseband processor. The first antenna 151 and the second antenna 161 are used to transmit and receive electromagnetic wave signals. Each antenna in electronic device 10 can be used to cover one or more communication frequency bands. Different antennas can also be reused to improve antenna utilization.

[0076] The mobile communication module 150 can provide a wireless communication solution for use in electronic devices, such as at least one of the following: a second-generation (2G) mobile communication solution, a third-generation (3G) mobile communication solution, a fourth-generation (5G) mobile communication solution, or a fifth-generation (5G) mobile communication solution.

[0077] The modem processor may include a modulator and a demodulator. The modulator modulates a low-frequency baseband signal to be transmitted into a mid-to-high frequency signal. The demodulator demodulates a received electromagnetic wave signal into a low-frequency baseband signal. The demodulator then transmits the demodulated low-frequency baseband signal to the baseband processor for processing. After processing by the baseband processor, the low-frequency baseband signal is transmitted to the application processor. The application processor outputs sound signals through audio devices (e.g., speaker 170A, receiver 170B) or displays images or videos through the display screen 194. In some embodiments, the modem processor may be a separate device. In other embodiments, the modem processor may be independent of the processor 110 and may be housed in the same device as the mobile communication module 150 or other functional modules.

[0078] Similar to the mobile communication module 150, the wireless communication module 160 can also provide wireless communication solutions for use in electronic devices, such as at least one of the following: wireless local area networks (WLAN), Bluetooth (BT), Bluetooth Low Energy (BLE), ultra-wideband (UWB), global navigation satellite system (GNSS), frequency modulation (FM), near field communication (NFC), infrared (IR) technology, etc.

[0079] In some embodiments, the first antenna 151 of the electronic device 10 is coupled to the mobile communication module 150, and the second antenna 161 of the electronic device 10 is coupled to the wireless communication module 160, so that the electronic device 10 can communicate with the network and other electronic devices through wireless communication technology.

[0080] Electronic device 10 can implement display functions through a GPU, a display screen 194, and an application processor. The GPU is a microprocessor for image processing, connected to the display screen 194 and the application processor. The GPU is used to perform mathematical and geometric calculations and for graphics rendering. Processor 110 may include one or more GPUs, which execute program instructions to generate or modify display information.

[0081] In some embodiments, the first antenna 151 of the electronic device 10 is coupled to the mobile communication module 150, and the second antenna 161 of the electronic device 10 is coupled to the wireless communication module 160, so that the electronic device can communicate with the network and other electronic devices through wireless communication technology.

[0082] The external storage interface 120 can be used to connect an external memory card, such as a secure digital (SD) card, to expand the storage capacity of the electronic device. The external memory card communicates with the processor 110 through the external storage interface 120 to perform data storage functions. For example, music, video, and other files can be saved on the external memory card.

[0083] Internal memory 121 can be used to store executable program code, including instructions. Internal memory 121 may include a program storage area and a data storage area. Internal memory 121 may be volatile memory or non-volatile memory, or both. Non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. Volatile memory may be random access memory (RAM), which serves as an external cache. By way of example, but not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous linked dynamic random access memory (SLDRAM), and direct rambus RAM (DR RAM).

[0084] The display screen 194 can be used to display images or videos. Optionally, the display screen 194 includes a display panel. The display panel can be a liquid crystal display (LCD), an organic light-emitting diode (OLED), an active-matrix organic light-emitting diode (AMOLED), a flexible light-emitting diode (FLED), a mini light-emitting diode (Mini LED), a micro light-emitting diode (Micro LED), a micro OLED, or a quantum dot light-emitting diode (QLED). In some embodiments, the electronic device 10 may include one or N displays 194, where N is a positive integer greater than 1.

[0085] Button 190 includes a power button and volume buttons. Button 190 can be a mechanical button or a touch button. The electronic device can receive button input signals and realize functions related to the button input signals.

[0086] Figure 3 This is a schematic diagram of the structure of a liquid crystal display provided in an embodiment of this application.

[0087] like Figure 3 As shown, the liquid crystal display 30 includes a controller 301, a pixel circuit module 302, and a light-emitting device 303. The pixel circuit module 302 is electrically connected to both the controller 301 and the light-emitting device 303. The main function of the controller 301 is to control the operating state of the pixel circuit module 302 according to external commands, thereby achieving precise control over the displayed content. Exemplarily, the controller 301 may include control signal lines, a data writing circuit, and a driving circuit. The controller 301 typically includes at least two control signal lines, which are used to transmit control signals to guide the operation of the pixel circuit module 302. The data writing circuit generates control signals based on the signals from the control signal lines and writes data voltages to the corresponding nodes of the pixel circuit module 302. The driving circuit controls the potential from the power supply terminal to the light-emitting unit according to the control signals, thereby driving the light-emitting device 303 to emit light.

[0088] The primary function of the pixel circuit module 302 is to store and control the brightness information of each pixel. The pixel circuit module 302 supplies a driving current corresponding to the data signal to the light-emitting device (e.g., OLED), thereby enabling image display. The pixel circuit module 302 typically includes key components such as switching transistors, storage capacitors, and driving circuits. These components work together to ensure effective control of the brightness and chromaticity of the pixels when a driving signal is applied. The pixel circuit module 302 has two main operating modes: active matrix and passive matrix. In the active matrix mode, each pixel is controlled by a single transistor, while in the passive matrix mode, specific pixels are activated by selecting rows and columns.

[0089] The light-emitting device 303 is the final output component of the liquid crystal display 30. Exemplarily, the light-emitting device 303 may include a light-emitting diode (LED) and an organic electroluminescent display (OLED). In an organic electroluminescent display, the light-emitting device 303 is typically an OLED. OLEDs, utilizing their self-emitting characteristics, are capable of displaying images with high brightness and color purity. An organic electroluminescent display is a display that emits light by electrically exciting fluorescent organic components. Its structure includes an anode layer, an organic thin film, and a cathode layer. Through a multi-layer structure design, efficient electron-hole balance can be achieved, enhancing luminous efficiency.

[0090] It should be understood that the above is only an example of the structure of the liquid crystal display 30. The liquid crystal display 30 may also include other subsystems or devices, such as power modules, etc. The specific configuration and modification can be made as needed, and the embodiments of this application do not impose any restrictions on this.

[0091] The following is combined Figures 4 to 6 The structure and existing problems of a pixel circuit module provided in the embodiments of this application will be further described.

[0092] Figure 4 This is a circuit diagram of a pixel circuit module provided in an embodiment of this application.

[0093] like Figure 4 As shown, the pixel circuit module 302 includes a first TFTM1 to a seventh TFTM7, a first capacitor C1, and a first diode D1. The fourth TFT includes a forty-first TFTM41 and a forty-second TFTM42, and the fifth TFT includes a fifty-first TFTM51 and a fifty-second TFTM52. The pixel circuit module 302 also includes a first node N1, a second node N2, and a third node N3. The first node N1 is a light-emitting control node, and the second node N2 and the third node N3 are adjacent nodes of the first node N1.

[0094] During operation, the 51st TFTM51 and the 52nd TFTM52 form the first reset unit, used to reset the third node N3, the first node N1, and the second node N2 according to the reset signal, restoring them to their initial states. The second TFTM2, the third TFTM3, and the 41st TFTM41 and the 42nd TFTM42 form the data writing unit, used to write data signals to the first node N1. Simultaneously, the voltage of the first node N1 is maintained by the first capacitor C1. The first TFTM1, the third TFTM3, and the sixth TFTM6 form the light-emitting unit, used to emit light according to the data signals stored in the first node N1. The seventh TFTM7 serves as the second reset unit, used to reset the first diode D1, restoring it to its initial state.

[0095] Figure 5 This is a timing diagram of a pixel circuit module provided in an embodiment of this application.

[0096] like Figure 5 As shown, the working cycle of the pixel circuit module 302 includes a first time period T1, a second time period T2, and a third time period T3. Among them, the first time period T1 is the reset stage, the second time period T2 is the data writing stage, and the third time period T3 is the light emission stage.

[0097] When the pixel circuit module 302 is in the first time period T1, the first scan signal Scan1 acts as a reset signal, resetting and turning on the third node N3, the first node N1, and the second node N2 at a low level. At this time, the second scan signal Scan2 is in a high-level off state, and the light emission control signal Emit is in a high-level off state.

[0098] When the pixel circuit module 302 is in the second time period T2, the first scan signal Scan1 is in a high-level off state, and the second scan signal Scan2 is in a low-level on state, used to write data signals to the first node N1. This causes the third TFTM3 to turn on its light-emitting path according to the written data signal. The magnitude of the current in the light-emitting path directly controls the brightness of the display screen. The current in the light-emitting path is I = K(Vgs - Vth). 2 K is a coefficient, Vgs is the voltage difference between the gate and source of the third TFTM3, and Vth is the threshold voltage. Therefore, the voltage between the gate and source of the third TFTM3 directly affects the current flowing through the display. The voltage difference Vgs between the gate and source of the third TFTM3 is written to and stored in the first node N1 through the data write signal, so the voltage of the first node N1 is extremely important for the stability of the display's light emission. In addition, the light emission control signal Emit remains in the high-level off state.

[0099] When the pixel circuit module 302 is in the third time period T3, the first scan signal Scan1 is still in the high-level off state, the second scan signal Scan2 is in the high-level off state, and the light emission control signal Emit is in the low-level on state, which is used to make the first diode D1 emit light according to the data signal stored in the first node N1.

[0100] Figure 6 This is a leakage path diagram of a pixel circuit module provided in an embodiment of this application.

[0101] like Figure 6 As shown, when the pixel circuit module 302 jumps from the second time period T2 to the third time period T3, due to the parasitic capacitance between the forty-first TFTM41 and the forty-second TFTM42 and the second scan signal Scan2, a large voltage change will occur in the second node N2 during the transition of the second scan signal Scan2 from a low level to a high level. This will cause the voltage difference between the first node N1 and the second node N2 to be too large, resulting in leakage. Consequently, the LCD will flicker, affecting the user experience.

[0102] The third node N3 is used to store the reset voltage. When the pixel circuit module 302 jumps from the second time period T2 to the third time period T3, since there is also parasitic capacitance between the fifty-first TFTM51 and the fifty-second TFTM52 and the second scan signal Scan2, a large voltage change will also occur in the third node N3 during the transition of the second scan signal Scan2 from a low level to a high level. This will cause the voltage difference between the first node N1 and the third node N3 to be too large, resulting in leakage and causing the LCD to flicker, which will affect the user experience.

[0103] Meanwhile, because the voltage of the second node N2 is controlled by the pixel circuit 302 when it is in the data writing stage, and the voltage of the third node N3 is controlled by the pixel circuit 302 when it is in the reset stage, the voltage difference between the second node N2, the third node N3 and the first node N1 will be large, causing significant leakage of the key node - the light-emitting control node N1, which in turn leads to problems such as the decrease or increase of the brightness of the liquid crystal display.

[0104] Table 1 below shows the voltage of key nodes in the pixel circuit module 302 during the light-emitting stage. As can be seen from Table 1, when the pixel circuit module 302 is in the light-emitting stage, if the brightness / grayscale is 2 nit / 32 gary and the light-emitting point brightness is 28.49 pA, the maximum voltage difference between the second node N2 and the third node N3 and the first node N1 is 4.229 pA. This voltage difference is relatively large, easily causing leakage at the first node N1, thus causing flickering in the LCD. If the brightness / grayscale is 800 nit / 255 gary and the light-emitting point brightness is 42.65 nA, the maximum voltage difference between the second node N2 and the third node N3 and the first node N1 is 5.277 pA. This voltage difference is also relatively large, easily causing leakage at the first node N1, thus causing flickering in the LCD.

[0105] Table 1. Voltages of key nodes in the pixel circuit module during the light-emitting phase.

[0106]

[0107] Meanwhile, the leakage time of the pixel circuit module 302 varies under different refresh rates and different light emission durations, resulting in significant differences in flicker levels. Especially with the current trend towards lower refresh rates in LCD screens, leakage issues worsen, preventing LCD displays from achieving even lower refresh rates. For example, current low-temperature polysilicon (LTPS) circuits cannot achieve lower refresh rates.

[0108] In view of this, the present application provides a pixel circuit that reduces the voltage difference between the light-emitting control node and adjacent nodes in the pixel circuit by adding a voltage regulator module, thereby reducing leakage at the light-emitting control node, reducing screen flicker, and improving user experience.

[0109] The following is combined Figures 7 to 14 The solutions provided in the embodiments of this application will then be described in detail.

[0110] Figure 7 This is a schematic diagram of a pixel circuit provided in an embodiment of this application. Figure 7 As shown, in one embodiment of this application, a pixel circuit 40 is provided.

[0111] The pixel circuit 40 includes a reset module 401, a data writing module 402, a light-emitting module 403, and a voltage regulator module 404. The reset module 401 resets the data writing module 402 according to a reset signal. A first terminal of the data writing module 402 is connected to a first terminal of the reset module 401, and a second terminal of the data writing module 402 is connected to the light-emitting module 403. The data writing module 402 writes and stores a data voltage according to a data signal. The light-emitting module 403 emits light according to the data voltage. A first terminal of the voltage regulator module 404 is connected to a third terminal of the data writing module 402, and the voltage regulator module 404 regulates the voltage of the data writing module 402. Alternatively, a second terminal of the voltage regulator module 404 is connected to a second terminal of the reset module 401, and the voltage regulator module 404 regulates the voltage of the reset module 401.

[0112] In this embodiment, during the operation of the pixel circuit 40, the reset module 401 first resets the data writing module 402 according to the reset signal, so that the voltage of the light-emitting control node of the data writing module 402 returns to its initial state. Then, the data writing module 402 writes and stores the data voltage according to the data signal to control the brightness of the light-emitting module 403. At the same time, the voltage regulator module 404 regulates the voltage of the data writing module 402 or the reset module 401, reducing the voltage difference between the data writing module 402 or the reset module 401 and the light-emitting control node (i.e., the data voltage) of the light-emitting module 403, reducing leakage at the light-emitting control node. Finally, the light-emitting module 403 emits light according to the data voltage, and the data voltage controls the brightness of the light-emitting module 403, thereby effectively reducing screen flicker and improving the user experience.

[0113] It should be noted that, in this embodiment, the voltage regulator module 404 can be connected only to the data writing module 402 to regulate the voltage node of the data writing module 402, reducing the voltage difference between the voltage node of the data writing module 402 and the light-emitting control node, thereby reducing leakage at the light-emitting control node. Alternatively, it can be connected only to the reset module 401 to regulate the voltage node of the reset module 401, reducing the voltage difference between the voltage node of the reset module 401 and the light-emitting control node, thereby reducing leakage at the light-emitting control node. Simultaneously, the voltage regulator module 404 can also be connected to both the data writing module 402 and the reset module 401, simultaneously reducing the voltage difference between the voltage nodes of the data writing module 402 and the light-emitting control node, as well as the voltage difference between the reset module 401 and the light-emitting control node, thereby reducing leakage at the light-emitting control node.

[0114] Figure 8 This is a circuit diagram of a pixel circuit provided in an embodiment of this application. Figure 8As shown, in one embodiment of this application, a pixel circuit 40 is provided.

[0115] The pixel circuit 40 includes a reset module 401, a data writing module 402, a light-emitting module 403, and a voltage regulator module 404. The reset module 401 resets the data writing module 402 according to a reset signal. A first terminal of the data writing module 402 is connected to a first terminal of the reset module 401, and a second terminal of the data writing module 402 is connected to the light-emitting module 403. The data writing module 402 writes and stores a data voltage according to a data signal. The light-emitting module 403 emits light according to the data voltage. A first terminal of the voltage regulator module 404 is connected to a third terminal of the data writing module 402, and the voltage regulator module 404 regulates the voltage of the data writing module 402. Alternatively, a second terminal of the voltage regulator module 404 is connected to a second terminal of the reset module 401, and the voltage regulator module 404 regulates the voltage of the reset module 401.

[0116] For example, the reset module 401 may include a 51st TFTM51 and a 52nd TFTM52. The gates of the 51st TFTM51 and the 52nd TFTM52 are both connected to the first scan signal Scan1. The drain of the 51st TFTM51 is electrically connected to the data writing module 402. The source of the 51st TFTM51 is connected to the drain of the 52nd TFTM52. The source of the 52nd TFTM52 is connected to the first reset signal Vini1.

[0117] It should be noted that the connection point between the fifty-first TFTM51 and the fifty-second TFTM52 can be used as the third node N3, that is, one of the adjacent nodes of the light-emitting control node N1.

[0118] In this embodiment, the 51st TFTM51 and the 52nd TFTM52 constitute a reset module 401. The first scan signal Scan1 serves as a reset switch signal. When the 51st TFTM51 and the 52nd TFTM52 receive the first scan signal Scan1, they are turned on, thereby sending the first reset signal Vini1 through the 51st TFTM51 and the 52nd TFTM52 to the data writing module 402, thus performing a reset operation on the data writing module 402.

[0119] For example, the data writing module 402 includes a second TFTM2, a third TFTM3, a forty-first TFTM41, a forty-second TFTM42, and a first capacitor C1. The gates of the second TFTM2, the forty-first TFTM41, and the forty-second TFTM42 are all connected to the second scan signal Scan2. The source of the second TFTM2 is connected to the data signal Vdata. The drain of the second TFTM2 is connected to the source of the third TFTM3. The drain of the third TFTM3 is connected to the source of the forty-first TFTM41. The drain of the forty-first TFTM41 is connected to the source of the forty-second TFTM42. The drain of the forty-second TFTM42 and the first plate of the first capacitor C1 are both connected to the output terminal of the reset module 401. The second plate of the first capacitor C1 is connected to a constant voltage ELVDD.

[0120] It should be noted that the gate of the third TFTM3 can serve as the first node N1, i.e., the light-emitting control node of the pixel circuit 40. The connection point between the drain of the forty-first TFTM41 and the source of the forty-second TFTM42 is the second node N2, which is also one of the adjacent nodes of the light-emitting control node N1.

[0121] In this embodiment, the second scan signal Scan2 serves as a data write switch signal. When the second TFTM2, the forty-first TFTM41, and the forty-second TFTM42 receive the second scan signal Scan2, they are turned on, thereby writing the data signal Vdata into the data write module 402. That is, the data signal Vdata passes through the second TFTM2, the third TFTM3, the forty-first TFTM41, and the forty-second TFTM42 to reach the first node N1. Then, the first capacitor C1 is used to store the data signal Vdata. The voltage difference Vgs between the gate and source of the third TFTM3, combined with the threshold voltage Vth, yields the current in the light-emitting path of the pixel circuit 40 as I = K(Vgs - Vth). 2 Thus, the brightness of the pixel circuit 40 is controlled by the current I in the light-emitting path of the pixel circuit 40.

[0122] For example, the light-emitting module 403 includes a first TFTM1, a sixth TFTM6, a seventh TFTM7, and a first diode D1. The source of the first TFTM1 is connected to a constant voltage ELVDD, the drain of the first TFTM1 is connected to the data writing module 402, and the gates of the first TFTM1 and the sixth TFTM6 are both connected to the light-emitting control signal Emit. The source of the sixth TFTM6 is connected to the data writing module 402, the drain of the sixth TFTM6 is connected to the drain of the seventh TFTM7 and the positive terminal of the first diode D1, the source of the seventh TFTM7 is connected to the second reset signal Vini2, the gate of the seventh TFTM7 is connected to the second reset switch signal Scan2 Up, and the negative terminal of the first diode D1 is grounded to ELVSS.

[0123] In this embodiment, firstly, when the gate of the seventh TFTM7 receives the second reset switch signal Scan2 Up (i.e., the OLED reset switch signal), it is turned on, thereby resetting the first diode D1 through the seventh TFTM7 using the second reset signal Vini2, so that the first diode D1 returns to its initial state. Then, when the first TFTM1 and the sixth TFTM6 receive the light emission control signal Emit, they are turned on, thereby sending the constant voltage ELVDD through the first TFTM1, the third TFTM3, and the sixth TFTM6 to the first diode D1, so that the first diode D1 emits light.

[0124] The following is combined Figures 8 to 11 The scheme of using semiconductor transistors to connect the voltage regulator module 404 to the data writing module 402 and the reset module 401 is introduced.

[0125] Exemplarily, in this embodiment, the voltage regulator module 404 may include a semiconductor transistor. The control terminal of the semiconductor transistor is connected to the data writing module 402, the first electrode of the semiconductor transistor is connected to the data writing module 401, and the second electrode of the semiconductor transistor is connected to the reset module 401. It should be understood that the semiconductor transistor may be one or more of a MOSFET, a transistor, and a TFT. Exemplarily, the voltage regulator module 404 may have the following first to fourth embodiments.

[0126] First embodiment: Exemplarily, such as Figure 8 As shown, the voltage regulator module 404 may include an eighth TFTM8. The gate of the eighth TFTM8 is connected to the second scan signal Scan2. The connection point between the source of the eighth TFTM8 and the drain of the forty-first TFTM41 and the source of the forty-second TFTM42 (i.e., the second node N2) is connected. The connection point between the drain of the eighth TFTM8 and the source of the fifty-first TFTM51 and the drain of the fifty-second TFTM52 (i.e., the third node N3) is connected.

[0127] Therefore, when the light-emitting control node (i.e., the first node N1) stores the light-emitting control voltage, connecting the second node N2 and the third node N3 together through the eighth TFTM8 can reduce the leakage current from the second node N2 and the third node N3 to the outside, and at the same time reduce the coupling effect of the second scan signal Scan2 on the second node N2 and the third node N3 during the data writing process. This reduces the voltage difference between the light-emitting control node (i.e., the first node N1) and the second node N2 and the third node N3, thereby reducing the flickering phenomenon of the display screen and improving the user experience.

[0128] Table 2 below shows the voltage of key nodes during the light-emitting stage in the first embodiment of the pixel circuit 40. As can be seen from Table 2, when the pixel circuit 40 is in the light-emitting stage, if the brightness / grayscale is 2 nit / 32 gary and the light-emitting point brightness is 28.49 pA, the maximum voltage difference between the second node N2 and the third node N3 and the first node N1 is 4.25. If the brightness / grayscale is 800 nit / 255 gary and the light-emitting point brightness is 42.65 nA, the maximum voltage difference between the second node N2 and the third node N3 and the first node N1 is 4.36.

[0129] As can be seen from Table 1, after connecting the second node N2 and the third node N3 through the eighth TFTM8, when the brightness / grayscale value is small, the voltage difference between the second node N2 and the third node N3 and the first node N1 does not change significantly. When the brightness / grayscale value is large, the voltage difference between the second node N2 and the third node N3 and the first node N1 is significantly reduced. This can reduce leakage current in the first node N1, thereby reducing the flickering phenomenon of the LCD and improving the user experience.

[0130] Table 2 shows the voltage of the key node during the light-emitting stage in the first embodiment of the pixel circuit.

[0131]

[0132] Second embodiment: Figure 9 This is a circuit diagram of another pixel circuit provided in this application embodiment. For example... Figure 9 As shown, in one embodiment of this application, a pixel circuit 40 is provided.

[0133] The pixel circuit 40 includes a reset module 401, a data writing module 402, a light-emitting module 403, and a voltage regulator module 404. The reset module 401 resets the data writing module 402 according to a reset signal. A first terminal of the data writing module 402 is connected to a first terminal of the reset module 401, and a second terminal of the data writing module 402 is connected to the light-emitting module 403. The data writing module 402 writes and stores a data voltage according to a data signal. The light-emitting module 403 emits light according to the data voltage. A first terminal of the voltage regulator module 404 is connected to a third terminal of the data writing module 402, and the voltage regulator module 404 regulates the voltage of the data writing module 402. Alternatively, a second terminal of the voltage regulator module 404 is connected to a second terminal of the reset module 401, and the voltage regulator module 404 regulates the voltage of the reset module 401.

[0134] In this embodiment, during the operation of the pixel circuit 40, the reset module 401 first resets the data writing module 402 according to the reset signal, so that the voltage of the light-emitting control node of the data writing module 402 returns to its initial state. Then, the data writing module 402 writes and stores the data voltage according to the data signal to control the brightness of the light-emitting module 403. At the same time, the voltage regulator module 404 regulates the voltage of the data writing module 402 or the reset module 401, reducing the voltage difference between the data writing module 402 or the reset module 401 and the light-emitting control node (i.e., the data voltage) of the light-emitting module 403, reducing leakage at the light-emitting control node. Finally, the light-emitting module 403 emits light according to the data voltage, and the data voltage controls the brightness of the light-emitting module 403, thereby effectively reducing screen flicker and improving the user experience.

[0135] It should be noted that, in this embodiment, the voltage regulator module 404 may include an eighth TFTM8 and a first voltage regulator capacitor Cst1. The gate of the eighth TFTM8 is connected to the second scan signal Scan2. The source of the eighth TFTM8 is connected to the connection point (i.e., the second node N2) between the drain of the forty-first TFTM41 and the source of the forty-second TFTM42, and the drain of the eighth TFTM8 is connected to the connection point (i.e., the third node N3) between the source of the fifty-first TFTM51 and the drain of the fifty-second TFTM52. The first plate of the first voltage regulator capacitor Cst1 is connected to the second node N2, and the second plate of the first voltage regulator capacitor Cst1 is connected to the constant voltage ELVDD.

[0136] Therefore, when the light-emitting control node (i.e., the first node N1) stores the light-emitting control voltage, connecting the second node N2 and the third node N3 together through the eighth TFTM8 can reduce the leakage current from the second node N2 and the third node N3. Simultaneously, connecting the first voltage-stabilizing capacitor Cst1 to the second node N2 can further reduce the voltage coupling effect on the second node N2 and the third node N3, and also reduce the coupling effect of the second scan signal Scan2 on the second node N2 and the third node N3 during data writing. This reduces the voltage difference between the light-emitting control node (i.e., the first node N1) and the second and third nodes N2 and N3, thereby reducing screen flicker and improving the user experience.

[0137] It should be understood that the first voltage regulator capacitor Cst1 can also be connected to other DC signals in the pixel circuit 40, and is not limited to the constant voltage ELVDD.

[0138] Third embodiment: Figure 10 This is a circuit diagram of another pixel circuit provided in this application embodiment. For example... Figure 10 As shown, in one embodiment of this application, a pixel circuit 40 is provided.

[0139] The pixel circuit 40 includes a reset module 401, a data writing module 402, a light-emitting module 403, and a voltage regulator module 404. The reset module 401 resets the data writing module 402 according to a reset signal. A first terminal of the data writing module 402 is connected to a first terminal of the reset module 401, and a second terminal of the data writing module 402 is connected to the light-emitting module 403. The data writing module 402 writes and stores a data voltage according to a data signal. The light-emitting module 403 emits light according to the data voltage. A first terminal of the voltage regulator module 404 is connected to a third terminal of the data writing module 402, and the voltage regulator module 404 regulates the voltage of the data writing module 402. Alternatively, a second terminal of the voltage regulator module 404 is connected to a second terminal of the reset module 401, and the voltage regulator module 404 regulates the voltage of the reset module 401.

[0140] In this embodiment, during the operation of the pixel circuit 40, the reset module 401 first resets the data writing module 402 according to the reset signal, so that the voltage of the light-emitting control node of the data writing module 402 returns to its initial state. Then, the data writing module 402 writes and stores the data voltage according to the data signal to control the brightness of the light-emitting module 403. At the same time, the voltage regulator module 404 regulates the voltage of the data writing module 402 or the reset module 401, reducing the voltage difference between the data writing module 402 or the reset module 401 and the light-emitting control node (i.e., the data voltage) of the light-emitting module 403, reducing leakage at the light-emitting control node. Finally, the light-emitting module 403 emits light according to the data voltage, and the data voltage controls the brightness of the light-emitting module 403, thereby effectively reducing screen flicker and improving the user experience.

[0141] It should be noted that, in this embodiment, the voltage regulator module 404 may include an eighth TFTM8 and a second voltage regulator capacitor Cst2. The gate of the eighth TFTM8 is connected to the second scan signal Scan2. The source of the eighth TFTM8 is connected to the connection point between the drain of the forty-first TFTM41 and the source of the forty-second TFTM42 (i.e., the second node N2). The drain of the eighth TFTM8 is connected to the connection point between the source of the fifty-first TFTM51 and the drain of the fifty-second TFTM52 (i.e., the third node N3). The first plate of the second voltage regulator capacitor Cst2 is connected to the third node N3, and the second plate of the second voltage regulator capacitor Cst2 is connected to the constant voltage ELVDD.

[0142] Therefore, when the light-emitting control node (i.e., the first node N1) stores the light-emitting control voltage, connecting the second node N2 and the third node N3 together through the eighth TFTM8 can reduce the leakage current from the second node N2 and the third node N3. Simultaneously, connecting the second voltage-stabilizing capacitor Cst2 to the third node N3 can further reduce the voltage coupling effect on the second node N2 and the third node N3, and also reduce the coupling effect of the second scan signal Scan2 on the second node N2 and the third node N3 during data writing. This reduces the voltage difference between the light-emitting control node (i.e., the first node N1) and the second and third nodes N2 and N3, thereby reducing screen flicker and improving the user experience.

[0143] It should be understood that the first voltage regulator capacitor Cst1 can also be connected to other DC signals in the pixel circuit 40, and is not limited to the constant voltage ELVDD.

[0144] Fourth embodiment: Figure 11 This is a circuit diagram of another pixel circuit provided in this application embodiment. For example... Figure 11 As shown, in one embodiment of this application, a pixel circuit 40 is provided.

[0145] The pixel circuit 40 includes a reset module 401, a data writing module 402, a light-emitting module 403, and a voltage regulator module 404. The reset module 401 resets the data writing module 402 according to a reset signal. A first terminal of the data writing module 402 is connected to a first terminal of the reset module 401, and a second terminal of the data writing module 402 is connected to the light-emitting module 403. The data writing module 402 writes and stores a data voltage according to a data signal. The light-emitting module 403 emits light according to the data voltage. A first terminal of the voltage regulator module 404 is connected to a third terminal of the data writing module 402, and the voltage regulator module 404 regulates the voltage of the data writing module 402. Alternatively, a second terminal of the voltage regulator module 404 is connected to a second terminal of the reset module 401, and the voltage regulator module 404 regulates the voltage of the reset module 401.

[0146] In this embodiment, during the operation of the pixel circuit 40, the reset module 401 first resets the data writing module 402 according to the reset signal, so that the voltage of the light-emitting control node of the data writing module 402 returns to its initial state. Then, the data writing module 402 writes and stores the data voltage according to the data signal to control the brightness of the light-emitting module 403. At the same time, the voltage regulator module 404 regulates the voltage of the data writing module 402 or the reset module 401, reducing the voltage difference between the data writing module 402 or the reset module 401 and the light-emitting control node (i.e., the data voltage) of the light-emitting module 403, reducing leakage at the light-emitting control node. Finally, the light-emitting module 403 emits light according to the data voltage, and the data voltage controls the brightness of the light-emitting module 403, thereby effectively reducing screen flicker and improving the user experience.

[0147] It should be noted that, in this embodiment, the voltage regulator module 404 may include an eighth TFTM8, a first voltage regulator capacitor Cst1, and a second voltage regulator capacitor Cst2. The gate of the eighth TFTM8 is connected to the second scan signal Scan2. The source of the eighth TFTM8 is connected to the connection point between the drain of the forty-first TFTM41 and the source of the forty-second TFTM42 (i.e., the second node N2). The drain of the eighth TFTM8 is connected to the connection point between the source of the fifty-first TFTM51 and the drain of the fifty-second TFTM52 (i.e., the third node N3). The first plate of the first voltage regulator capacitor Cst1 is connected to the second node N2, and the second plate of the first voltage regulator capacitor Cst1 is connected to the constant voltage ELVDD. The first plate of the second voltage regulator capacitor Cst2 is connected to the third node N3, and the second plate of the second voltage regulator capacitor Cst2 is connected to the constant voltage ELVDD.

[0148] Therefore, when the light-emitting control node (i.e., the first node N1) stores the light-emitting control voltage, connecting the second node N2 and the third node N3 together through the eighth TFTM8 can reduce the leakage current from the second node N2 and the third node N3. Simultaneously, connecting the first voltage-stabilizing capacitor Cst1 to the second node N2 and the second voltage-stabilizing capacitor Cst2 to the third node N3 can further reduce the voltage coupling effect on the second node N2 and the third node N3, and also reduce the coupling effect of the second scan signal Scan2 on the second node N2 and the third node N3 during data writing. This reduces the voltage difference between the light-emitting control node (i.e., the first node N1) and the second and third nodes N2 and N3, thereby reducing screen flicker and improving the user experience.

[0149] It should be understood that the first voltage regulator capacitor Cst1 can also be connected to other DC signals in the pixel circuit 40, and is not limited to the constant voltage ELVDD.

[0150] Table 3 below shows the voltage of key nodes during the light-emitting stage in the fourth embodiment of the pixel circuit 40. As can be seen from Table 3, when the pixel circuit 40 is in the light-emitting stage, if the brightness / grayscale is 2 nit / 32 gary and the light-emitting point brightness is 28.49 pA, the maximum voltage difference between the second node N2 and the third node N3 and the first node N1 is 1.278. If the brightness / grayscale is 800 nit / 255 gary and the light-emitting point brightness is 42.65 nA, the maximum voltage difference between the second node N2 and the third node N3 and the first node N1 is 1.074.

[0151] Therefore, by connecting the second node N2 and the third node N3 through the eighth TFTM8, and simultaneously connecting the first voltage regulator Cst1 to the second node N2 and the second voltage regulator Cst2 to the third node N3, when the brightness / grayscale value is relatively small (2 nit / 32 Gary), the voltage difference between the second node N2 and the third node N3 and the first node N1 is 1.278, which shows a significant reduction compared to Tables 1 and 2. When the brightness / grayscale value is relatively large (800 nit / 255 Gary), the voltage difference between the second node N2 and the third node N3 and the first node N1 is 1.074, also showing a significant reduction compared to Tables 1 and 2. This effectively reduces leakage current at the first node N1, thereby reducing flickering in the LCD and improving the user experience.

[0152] Table 3 shows the voltage of the key node during the light-emitting stage in the fourth embodiment of the pixel circuit.

[0153]

[0154] The following is combined Figures 12 to 14The scheme of setting voltage stabilizing capacitors in the data writing module 402 and / or the reset module 401 of the voltage stabilizing module 404 is introduced.

[0155] Fifth embodiment: Figure 12 This is a circuit diagram of another pixel circuit provided in this application embodiment. For example... Figure 12 As shown, in one embodiment of this application, a pixel circuit 40 is provided.

[0156] The pixel circuit 40 includes a reset module 401, a data writing module 402, a light-emitting module 403, and a voltage regulator module 404. The reset module 401 resets the data writing module 402 according to a reset signal. A first terminal of the data writing module 402 is connected to a first terminal of the reset module 401, and a second terminal of the data writing module 402 is connected to the light-emitting module 403. The data writing module 402 writes and stores a data voltage according to a data signal. The light-emitting module 403 emits light according to the data voltage. A first terminal of the voltage regulator module 404 is connected to a third terminal of the data writing module 402, and the voltage regulator module 404 regulates the voltage of the data writing module 402. Alternatively, a second terminal of the voltage regulator module 404 is connected to a second terminal of the reset module 401, and the voltage regulator module 404 regulates the voltage of the reset module 401.

[0157] In this embodiment, during the operation of the pixel circuit 40, the reset module 401 first resets the data writing module 402 according to the reset signal, so that the voltage of the light-emitting control node of the data writing module 402 returns to its initial state. Then, the data writing module 402 writes and stores the data voltage according to the data signal to control the brightness of the light-emitting module 403. At the same time, the voltage regulator module 404 regulates the voltage of the data writing module 402 or the reset module 401, reducing the voltage difference between the data writing module 402 or the reset module 401 and the light-emitting control node (i.e., the data voltage) of the light-emitting module 403, reducing leakage at the light-emitting control node. Finally, the light-emitting module 403 emits light according to the data voltage, and the data voltage controls the brightness of the light-emitting module 403, thereby effectively reducing screen flicker and improving the user experience.

[0158] It should be noted that, in the embodiments of this application, the voltage regulator module 404 includes a third voltage regulator capacitor Cst3. The first substrate of the third voltage regulator capacitor Cst3 is connected to the connection point (i.e., the second node N2) of the drain of the forty-first TFTM41 and the source of the forty-second TFTM41 in the data writing module 402. The second plate of the third voltage regulator capacitor Cst3 is connected to a constant voltage ELVDD.

[0159] Therefore, when the light-emitting control node (i.e., the first node N1) stores the light-emitting control voltage, the voltage regulation effect of the third voltage-stabilizing capacitor Cst3 connected to the second node N2 can reduce the influence of the coupling voltage on the second node N2. At the same time, it can reduce the coupling influence of the second scan signal Scan2 on the second node N2 and the third node N3 during the data writing process, thereby reducing the voltage difference between the light-emitting control node (i.e., the first node N1) and the second node N2 and the third node N3, thus reducing the flickering phenomenon of the display screen and improving the user experience.

[0160] Table 4 below shows the voltage of key nodes during the light-emitting stage in the fifth embodiment of the pixel circuit 40. As can be seen from Table 4, when the pixel circuit 40 is in the light-emitting stage, if the brightness / grayscale is 2 nit / 32 gary and the light-emitting point brightness is 28.49 pA, then the maximum voltage difference between the second node N2 and the third node N3 and the first node N1 is 1.006. If the brightness / grayscale is 800 nit / 255 gary and the light-emitting point brightness is 42.65 nA, then the maximum voltage difference between the second node N2 and the third node N3 and the first node N1 is 0.601.

[0161] Therefore, after connecting the third voltage regulator capacitor Cst3 through the second node N2, when the brightness / grayscale value is relatively small (2 nit / 32 Gary), the voltage difference between the second node N2 and the third node N3 and the first node N1 is 1.006, which shows a significant reduction compared to Table 1. When the brightness / grayscale value is relatively large (800 nit / 255 Gary), the voltage difference between the second node N2 and the third node N3 and the first node N1 is 0.601, also showing a significant reduction compared to Table 1. This effectively reduces leakage current at the first node N1, thereby reducing flickering in the LCD and improving the user experience.

[0162] Table 4 shows the voltage of the key node during the light-emitting stage in the fifth embodiment of the pixel circuit.

[0163]

[0164] Sixth embodiment: Figure 13 This is a circuit diagram of another pixel circuit provided in this application embodiment. For example... Figure 13 As shown, in one embodiment of this application, a pixel circuit 40 is provided.

[0165] The pixel circuit 40 includes a reset module 401, a data writing module 402, a light-emitting module 403, and a voltage regulator module 404. The reset module 401 resets the data writing module 402 according to a reset signal. A first terminal of the data writing module 402 is connected to a first terminal of the reset module 401, and a second terminal of the data writing module 402 is connected to the light-emitting module 403. The data writing module 402 writes and stores a data voltage according to a data signal. The light-emitting module 403 emits light according to the data voltage. A first terminal of the voltage regulator module 404 is connected to a third terminal of the data writing module 402, and the voltage regulator module 404 regulates the voltage of the data writing module 402. Alternatively, a second terminal of the voltage regulator module 404 is connected to a second terminal of the reset module 401, and the voltage regulator module 404 regulates the voltage of the reset module 401.

[0166] In this embodiment, during the operation of the pixel circuit 40, the reset module 401 first resets the data writing module 402 according to the reset signal, so that the voltage of the light-emitting control node of the data writing module 402 returns to its initial state. Then, the data writing module 402 writes and stores the data voltage according to the data signal to control the brightness of the light-emitting module 403. At the same time, the voltage regulator module 404 regulates the voltage of the data writing module 402 or the reset module 401, reducing the voltage difference between the data writing module 402 or the reset module 401 and the light-emitting control node (i.e., the data voltage) of the light-emitting module 403, reducing leakage at the light-emitting control node. Finally, the light-emitting module 403 emits light according to the data voltage, and the data voltage controls the brightness of the light-emitting module 403, thereby effectively reducing screen flicker and improving the user experience.

[0167] It should be noted that, in the embodiments of this application, the voltage regulator module 404 includes a fourth voltage regulator capacitor Cst4. The first substrate of the fourth voltage regulator capacitor Cst4 is connected to the connection point (i.e., the third node N3) of the source and drain of the fifty-first TFTM51 and the fifty-second TFTM51 in the reset module 401. The second plate of the fourth voltage regulator capacitor Cst4 is connected to a constant voltage ELVDD.

[0168] Therefore, when the light-emitting control node (i.e., the first node N1) stores the light-emitting control voltage, the voltage regulation effect of the fourth voltage-stabilizing capacitor Cst4 connected to the third node N3 can reduce the influence of the coupling voltage on the third node N3. At the same time, it can reduce the coupling influence of the second scan signal Scan2 on the second node N2 and the third node N3 during the data writing process, thereby reducing the voltage difference between the light-emitting control node (i.e., the first node N1) and the second node N2 and the third node N3, thus reducing the flickering phenomenon of the display screen and improving the user experience.

[0169] Seventh embodiment: Figure 14 This is a circuit diagram of another pixel circuit provided in this application embodiment. For example... Figure 14 As shown, in one embodiment of this application, a pixel circuit 40 is provided.

[0170] The pixel circuit 40 includes a reset module 401, a data writing module 402, a light-emitting module 403, and a voltage regulator module 404. The reset module 401 resets the data writing module 402 according to a reset signal. A first terminal of the data writing module 402 is connected to a first terminal of the reset module 401, and a second terminal of the data writing module 402 is connected to the light-emitting module 403. The data writing module 402 writes and stores a data voltage according to a data signal. The light-emitting module 403 emits light according to the data voltage. A first terminal of the voltage regulator module 404 is connected to a third terminal of the data writing module 402, and the voltage regulator module 404 regulates the voltage of the data writing module 402. Alternatively, a second terminal of the voltage regulator module 404 is connected to a second terminal of the reset module 401, and the voltage regulator module 404 regulates the voltage of the reset module 401.

[0171] In this embodiment, during the operation of the pixel circuit 40, the reset module 401 first resets the data writing module 402 according to the reset signal, so that the voltage of the light-emitting control node of the data writing module 402 returns to its initial state. Then, the data writing module 402 writes and stores the data voltage according to the data signal to control the brightness of the light-emitting module 403. At the same time, the voltage regulator module 404 regulates the voltage of the data writing module 402 or the reset module 401, reducing the voltage difference between the data writing module 402 or the reset module 401 and the light-emitting control node (i.e., the data voltage) of the light-emitting module 403, reducing leakage at the light-emitting control node. Finally, the light-emitting module 403 emits light according to the data voltage, and the data voltage controls the brightness of the light-emitting module 403, thereby effectively reducing screen flicker and improving the user experience.

[0172] It should be noted that, in this embodiment, the voltage regulator module 404 includes a third voltage regulator capacitor Cst3 and a fourth voltage regulator capacitor Cst4. The first substrate of the third voltage regulator capacitor Cst3 is connected to the connection point (i.e., the second node N2) between the drain of the forty-first TFTM41 and the source of the forty-second TFTM42 in the data writing module 402. The second plate of the third voltage regulator capacitor Cst3 is connected to a constant voltage ELVDD. The first substrate of the fourth voltage regulator capacitor Cst4 is connected to the connection point (i.e., the third node N3) between the source of the fifty-first TFTM51 and the drain of the fifty-second TFTM51 in the reset module 401. The second plate of the fourth voltage regulator capacitor Cst4 is connected to a constant voltage ELVDD.

[0173] Therefore, when the light-emitting control node (i.e., the first node N1) stores the light-emitting control voltage, the voltage regulation effect of the third voltage-regulating capacitor Cst3 connected to the second node N2 can reduce the influence of coupling voltage on the second node N2. Similarly, the voltage regulation effect of the fourth voltage-regulating capacitor Cst4 connected to the third node N3 can reduce the influence of coupling voltage on the third node N3. This also reduces the coupling effect of the second scan signal Scan2 on the second node N2 and the third node N3 during data writing, thereby reducing the voltage difference between the light-emitting control node (i.e., the first node N1) and the second and third nodes N2 and N3, thus reducing screen flicker and improving the user experience.

[0174] In summary, in this embodiment, adding a voltage regulator module 404 to the pixel circuit 40, specifically between the second node N2 and the third node N3, can effectively reduce the voltage difference between the second node N2 and the third node N3 and the first node N1, thereby reducing the voltage across the leakage path related to the first node N1. This reduces changes in the luminous current and optimizes the display flicker phenomenon at low refresh rates. Simultaneously, adding the voltage regulator module 404 to the pixel circuit 40 reduces leakage at the luminous control node, enabling the liquid crystal display to achieve even lower refresh rates. Furthermore, it reduces leakage differences in the pixel circuit 40 between different refresh rates, allowing brightness data information to be shared across different refresh rates.

[0175] For example, this application also provides a display module. The display module includes a controller and a pixel circuit 40. The controller is electrically connected to the pixel circuit 40 and is used to control the pixel circuit 40 to emit light.

[0176] In this embodiment, the controller outputs a reset signal, a data write signal, and a light emission control signal to enable the pixel circuit 40 to complete the light emission process. For example, during the operation of the display module, firstly, the controller outputs a first reset switch signal to put the reset module 401 into a conducting state. The reset module 401 performs a reset operation on the data write module 402 according to the first reset signal, so that the voltage of the light emission control node of the data write module 402 returns to its initial state. Then, the controller outputs a data write switch signal to put the data write module 402 into a conducting state. The data write module 402 writes and stores the data voltage according to the data signal to control the light emission brightness of the light emission module 403. At the same time, the voltage regulator module 404 also performs voltage regulation on the data write module 402 or the reset module 401 to reduce the voltage difference between the data write module 402 or the reset module 401 and the light emission control node (i.e., the data voltage) of the light emission module 403, thereby reducing leakage at the light emission control node. Finally, the controller outputs a light emission control signal, and the light emission module 403 emits light according to the data voltage. The data voltage controls the brightness of the light emission module 403, thereby effectively reducing the flickering of the display screen through the voltage regulator module 404 and improving the user experience.

[0177] For example, the display module can be an active-matrix display for electronic devices such as mobile phones, tablets, televisions (TVs), and watches. The manufacturing process of the display module can include low-temperature polysilicon (LTPS) technology, indium gallium zinc oxide (LGZO) technology, and low-temperature polysilicon oxide (LTPO) technology. The panel substrate of the display module can include glass, polyimide (PI), etc. The light-emitting material of the display module can include organic light-emitting diodes (OLEDs), light-emitting diodes (LEDs), sub-millimeter light-emitting diodes (Mini LEDs), microlight-emitting diodes (Micro LEDs), etc.

[0178] For example, this application also provides an electronic device 10, which includes a power module and a display module. The power module is electrically connected to the display module and is used to supply power to the display module.

[0179] In this embodiment, the power module supplies power to the display module, enabling it to perform its display function. For example, during the operation of the electronic device, the power module supplies power to the controller in the display module, allowing the controller to perform its control function. The power module also supplies power to the pixel circuit 40 in the display module, including components such as the reset module 401, data writing module 402, light-emitting module 403, and voltage regulator module 404, enabling the pixel circuit 40 to perform its display function.

[0180] Meanwhile, during the operation of the pixel circuit 40, the reset module 401 first resets the data writing module 402 according to the reset signal, so that the voltage of the light-emitting control node of the data writing module 402 returns to its initial state. Then, the data writing module 402 writes and stores the data voltage according to the data signal to control the brightness of the light-emitting module 403. At the same time, the voltage regulator module 404 regulates the voltage of the data writing module 402 or the reset module 401, reducing the voltage difference between the data writing module 402 or the reset module 401 and the light-emitting control node (i.e., the data voltage) of the light-emitting module 403, reducing leakage at the light-emitting control node. Finally, the light-emitting module 403 emits light according to the data voltage, and the data voltage controls the brightness of the light-emitting module 403, thereby effectively reducing screen flicker and improving the user experience.

[0181] It should be understood that the above is only an example of the structure of electronic device 10. Electronic device 10 may also include other subsystems or devices, which can be set and modified as needed. This application embodiment does not impose any restrictions on this.

[0182] The beneficial effects that the electronic device provided in the above-described embodiments of this application can achieve can be referred to the beneficial effects corresponding to the modules provided above, and will not be repeated here.

[0183] It should be understood that the above description is merely to help those skilled in the art better understand the embodiments of this application, and is not intended to limit the scope of the embodiments of this application. Based on the examples given above, those skilled in the art can obviously make various equivalent modifications or changes. For example, some steps in the various embodiments of the above detection method may be unnecessary, or new steps may be added. Alternatively, any combination of two or more of the above embodiments may be used. Such modifications, changes, or combinations also fall within the scope of the embodiments of this application. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interfaces, devices, or units, and may be electrical, mechanical, or other forms.

[0184] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0185] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0186] It should also be understood that the above description of the embodiments of this application focuses on highlighting the differences between the various embodiments. Any similarities or differences not mentioned can be referred to each other. For the sake of brevity, they will not be repeated here.

[0187] It should also be understood that, in the various embodiments of this application, the sequence number of each process does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0188] It should also be understood that in the embodiments of this application, "pre-setting" or "pre-defining" can be achieved by pre-saving the corresponding code, table or other means that can be used to indicate relevant information in the device (e.g., including electronic devices), and this application does not limit the specific implementation method.

[0189] It should also be understood that the methods, situations, categories, and classifications of embodiments in this application are for the convenience of description only and should not constitute a special limitation. Various methods, categories, situations, and features in embodiments can be combined without contradiction.

[0190] It should also be understood that, in the various embodiments of this application, unless otherwise specified or in case of logical conflict, the terms and / or descriptions between different embodiments are consistent and can be referenced by each other, and the technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationships.

[0191] Finally, it should be noted that the above descriptions are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of protection of the claims. In conclusion, the above descriptions are merely preferred embodiments of the technical solutions of this application and are not intended to limit the scope of protection of this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A pixel circuit, characterized by comprising: The reset module, the data writing module, the light emitting module and the voltage stabilizing module are included. The reset module is configured to reset the data writing module according to a reset signal. The first end of the data writing module is connected with the first end of the reset module, and the second end of the data writing module is connected with the light emitting module. The data writing module is configured to write and store a data voltage according to a data signal. The light emitting module is configured to emit light according to the data voltage.

2. The pixel circuit of claim 1, wherein, The first end of the voltage stabilizing module is connected with the third end of the data writing module, and the voltage stabilizing module is configured to stabilize the data writing module.

3. The pixel circuit of claim 2, wherein, The second end of the voltage stabilizing module is connected with the second end of the reset module, and the voltage stabilizing module is configured to stabilize the reset module.

4. The pixel circuit of claim 2, wherein, The voltage stabilizing module includes a semiconductor transistor, the control end of the semiconductor transistor is connected with the data writing module, the first electrode of the semiconductor transistor is connected with the data writing module, and the second electrode of the semiconductor transistor is connected with the reset module.

5. The pixel circuit of claim 2, wherein, The voltage stabilizing module further includes a first voltage stabilizing capacitor, the first substrate of the first voltage stabilizing capacitor is connected with the data writing module, and the second electrode plate of the first voltage stabilizing capacitor is connected with a constant voltage.

6. The pixel circuit of any one of claims 2-5, wherein, The voltage stabilizing module further includes a second voltage stabilizing capacitor, the first substrate of the second voltage stabilizing capacitor is connected with the reset module, and the second electrode plate of the second voltage stabilizing capacitor is connected with the constant voltage.

7. The pixel circuit of claim 1, wherein, The voltage stabilizing module further includes a first voltage stabilizing capacitor and a second voltage stabilizing capacitor, the first substrate of the first voltage stabilizing capacitor is connected with the data writing module, the second electrode plate of the first voltage stabilizing capacitor is connected with the constant voltage, the first substrate of the second voltage stabilizing capacitor is connected with the reset module, and the second electrode plate of the second voltage stabilizing capacitor is connected with the constant voltage.

8. The pixel circuit of claim 1, wherein, The semiconductor transistor includes one or more of MOSFET, triode and TFT.

9. The pixel circuit of claim 1, wherein, The voltage stabilizing module includes a third voltage stabilizing capacitor, the first substrate of the third voltage stabilizing capacitor is connected with the data writing module, and the second electrode plate of the third voltage stabilizing capacitor is connected with a constant voltage.

10. The pixel circuit of any one of claims 1-9, wherein, The voltage stabilizing module includes a fourth voltage stabilizing capacitor, the first substrate of the fourth voltage stabilizing capacitor is connected with the reset module, and the second electrode plate of the fourth voltage stabilizing capacitor is connected with the constant voltage. The voltage stabilizing module further includes a third voltage stabilizing capacitor and a fourth voltage stabilizing capacitor, the first substrate of the third voltage stabilizing capacitor is connected with the data writing module, the second electrode plate of the third voltage stabilizing capacitor is connected with the constant voltage, the first substrate of the fourth voltage stabilizing capacitor is connected with the reset module, and the second electrode plate of the fourth voltage stabilizing capacitor is connected with the constant voltage. The reset module includes a fifty-first TFT and a fifty-second TFT, the gate of the fifty-first TFT and the gate of the fifty-second TFT are connected with a first scanning signal, the drain of the fifty-first TFT is connected with the data writing module, the source of the fifty-first TFT is connected with the drain of the fifty-second TFT, and the source of the fifty-second TFT is connected with a first reset signal.

11. The pixel circuit of any one of claims 1-10, wherein, The data writing module comprises a second TFT, a third TFT, a forty-first TFT, a forty-second TFT and a first capacitor; the gate of the second TFT, the gate of the forty-first TFT and the gate of the forty-second TFT are connected to a second scanning signal; the source of the second TFT is connected to a data signal; the drain of the second TFT is connected to the source of the third TFT; the drain of the third TFT is connected to the source of the forty-first TFT; the drain of the forty-first TFT is connected to the source of the forty-second TFT; the drain of the forty-second TFT and the first plate of the first capacitor are connected to the reset module; and the second plate of the first capacitor is connected to a constant voltage.

12. The pixel circuit of any one of claims 1-11, wherein, The light emitting module comprises a first TFT, a sixth TFT, a seventh TFT and a first diode; the source of the first TFT is connected to a constant voltage; the drain of the first TFT is connected to the data writing module; the gate of the first TFT and the gate of the sixth TFT are connected to a light emitting control signal; the source of the sixth TFT is connected to the data writing module; the drain of the sixth TFT is connected to the drain of the seventh TFT and the anode of the first diode; the source of the seventh TFT is connected to a second reset signal; the gate of the seventh TFT is connected to a reset switch signal; and the cathode of the first diode is grounded.

13. A display module, characterized by The display module comprises a control device and the pixel circuit according to any one of claims 1 to 12. The control device is connected to the pixel circuit and is configured to control the pixel circuit to emit light.

14. An electronic device, comprising: The display module comprises a power supply module and the display module according to claim 13; the power supply module is connected to the display module and is configured to supply power to the display module. The display module comprises a control device and the pixel circuit according to any one of claims 1 to 12. The control device is connected to the pixel circuit and is configured to control the pixel circuit to emit light. The display module comprises a power supply module and the display module according to claim 13; the power supply module is connected to the display module and is configured to supply power to the display module.

Images