Pixel circuit and electronic device

Abstract

The application discloses a pixel circuit and an electronic device. The pixel circuit comprises a light-emitting element, a driving module, a first compensation module and a second compensation module. The light-emitting element is connected with a power supply module through the driving module. The driving module controls the light-emitting element to be turned on or turned off according to a first control signal. The first compensation module is connected with the driving module and is used for threshold voltage compensation of the driving module according to a second control signal. The first compensation module is also used for inputting a display control signal for controlling the pixel circuit to be in a display area or a non-display area. One end of the second compensation module is connected with a first electrode of the light-emitting element, and the other end is connected with a first power supply. The second compensation module is used for being in a straight-through path or a load path according to the second control signal and a third control signal. When the pixel circuit is in the display area, the light-emitting element is connected with the first power supply through the straight-through path. When the pixel circuit is in the non-display area, the light-emitting element is connected with the first power supply through the load path.

Description

Technical Field

[0001] This application relates to the field of electronic product technology, and in particular to a pixel circuit and electronic device. Background Technology

[0002] An active matrix organic light-emitting diode (AMOLED) circuit consists of multiple thin-film transistor (TFT) driving switches and one organic light-emitting diode (OLED) for each pixel circuit. In existing technologies, pixel circuit display is typically achieved by inputting control signals (such as pulse signals) to the TFTs in the pixel circuit. However, current pixel circuit control methods suffer from a high OLED anode initialization frequency, causing variations in the degree of OLED anode initialization at different times, resulting in screen splitting issues at low brightness and low grayscale levels. Summary of the Invention

[0003] This application provides a pixel circuit and electronic device to solve the problem of screen splitting that is common in current pixel circuits.

[0004] To solve the above-mentioned technical problems, this application is implemented as follows:

[0005] In a first aspect, embodiments of this application provide a pixel circuit, including:

[0006] Light-emitting elements;

[0007] The driving module connects the light-emitting element to the power supply module; the driving module controls the light-emitting element to turn on or off according to the input first control signal.

[0008] A first compensation module is connected to the driving module; the first compensation module is used to perform threshold voltage compensation on the driving module according to the input second control signal; the first compensation module is also used to input a display control signal, the display control signal being used to control the pixel circuit to be in the display area or the non-display area;

[0009] The second compensation module has one end connected to the first electrode of the light-emitting element and the other end connected to the first power supply. The second compensation module is used to be in a direct path or a load path according to the input second control signal and third control signal. When the pixel circuit is in the display area, the light-emitting element is connected to the first power supply through the direct path; when the pixel circuit is in the non-display area, the light-emitting element is connected to the first power supply through the load path.

[0010] Secondly, embodiments of this application also provide an electronic device, including pixel circuits as described above.

[0011] Thirdly, embodiments of this application also provide a control method for a pixel circuit, applied to the electronic device described above, the method comprising:

[0012] During the first time period, the second control signal is output to the first compensation module, and the second control signal and the third control signal are output to the second compensation module to control the first compensation module to perform threshold voltage compensation on the drive module, while controlling the second compensation module to be in the through path.

[0013] During the second time period, the first control signal is output to the driving module to control the light-emitting element to turn on;

[0014] During the third time period, the second control signal is output to the first compensation module, and the second control signal and the third control signal are output to the second compensation module to control the first compensation module to perform threshold voltage compensation on the drive module, while controlling the second compensation module to be in the load path.

[0015] Fourthly, embodiments of this application also provide a control device for a pixel circuit, applied to the electronic device described above, the device comprising:

[0016] The first control module is configured to output the second control signal to the first compensation module and output the second control signal and the third control signal to the second compensation module during a first time period, thereby controlling the first compensation module to perform threshold voltage compensation on the drive module and simultaneously controlling the second compensation module to be in the through path.

[0017] The second control module is used to output the first control signal to the driving module during the second time period to control the light-emitting element to turn on.

[0018] The third control module is used to output the second control signal to the first compensation module and output the second control signal and the third control signal to the second compensation module during the third time period, thereby controlling the first compensation module to perform threshold voltage compensation on the drive module and simultaneously controlling the second compensation module to be in the load path.

[0019] Fifthly, embodiments of this application provide an electronic device including a processor, a memory, and a program or instructions stored in the memory and executable on the processor, wherein the program or instructions, when executed by the processor, implement the steps of the pixel circuit control method as described in the third aspect.

[0020] In a sixth aspect, embodiments of this application provide a readable storage medium storing a program or instructions that, when executed by a processor, implement the steps of the pixel circuit control method as described in the first aspect.

[0021] In a seventh aspect, embodiments of this application provide a chip, the chip including a processor and a communication interface, the communication interface being coupled to the processor, the processor being used to run programs or instructions to implement the steps of the pixel circuit control method as described in the first aspect.

[0022] In the above-described solution of this application, while the first compensation module and the second compensation module are controlled by the same second control signal, the second compensation module is further controlled to be in a direct path or a load path by a third control signal. Furthermore, when the pixel circuit is in the display area, the light-emitting element is connected to the first power supply through the direct path for initialization; when the pixel circuit is in the non-display area, the light-emitting element is connected to the first power supply through the load path for initialization. This ensures that the light-emitting element achieves a consistent initialization level whether the pixel circuit is in the non-display area or the display area, avoiding screen splitting caused by inconsistent initialization levels of the light-emitting elements in the pixel circuit. Attached Figure Description

[0023] Figure 1 A schematic diagram illustrating the split-screen phenomenon in pixel circuitry;

[0024] Figure 2 One of the timing diagrams representing the EM signal;

[0025] Figure 3 The second timing diagram representing the EM signal;

[0026] Figure 4 A schematic diagram illustrating the pixel circuit of an embodiment of this application;

[0027] Figure 5One of the timing diagrams illustrating the control signals of the pixel circuit provided in the embodiments of this application;

[0028] Figure 6 This is the second timing diagram illustrating the control signals of the pixel circuit provided in the embodiments of this application;

[0029] Figure 7 A flowchart illustrating the control method for the pixel circuit provided in the embodiments of this application;

[0030] Figure 8 This is a schematic diagram of the pixel circuit control device provided in the embodiments of this application;

[0031] Figure 9 This is a schematic diagram of the structure of the electronic device provided in the embodiments of this application;

[0032] Figure 10 This is a schematic diagram showing the hardware structure of the electronic device provided in the embodiments of this application. Detailed Implementation

[0033] Exemplary embodiments of the present application will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this application will be thorough and complete, and will fully convey the scope of the present application to those skilled in the art.

[0034] The following section introduces the relevant technologies of pixel circuits:

[0035] A typical pixel circuit may include multiple TFT driver switches and an OLED. Like ordinary diodes, OLEDs are composed of a PN junction. The region with more electrons (negatively charged) is called the N-region, and the region with more holes (positively charged) is called the P-region; the N and P regions form the PN junction. The PN junction has the characteristic of unidirectional conductivity and reverse blocking. When a forward voltage is applied to the LED, holes injected from the P-region into the N-region and electrons injected from the N-region into the P-region recombine with electrons in the N-region and holes in the P-region near the PN junction, respectively, producing spontaneous emission fluorescence. The energy states of electrons and holes differ in different semiconductor materials. The more energy released when electrons and holes recombine, the shorter the wavelength of the emitted light. Commonly used diodes emit red, green, or blue light.

[0036] Taking an 8T1C pixel circuit (i.e., the pixel circuit includes 8 TFT driving switches and an OLED) as an example, since the TFT switch used for OLED anode initialization and the TFT switch used for compensating the main driving switch are controlled by the same signal, the frequency of OLED anode initialization is too high, causing the degree of OLED anode initialization to vary in different time periods, resulting in the problem of split screen in low brightness and low grayscale scenes.

[0037] For the aforementioned 8T1C pixel circuit, a schematic diagram of the scanning drive of the OLED switching signal (EM) for two consecutive frames (e.g., the nth frame and the (n+1)th frame) is given, as follows: Figure 1 As shown. The timing diagram of the corresponding EM pulse signal is as follows. Figure 2 and Figure 3 As shown. Figure 1 The small black squares represent EM pulses. The Active interval indicates that the pixel circuit is in the display area. At this time, the timing of the EM pulse is 111 at EM(1). EM pulse 113 indicates that there are three EM pulses in the Active interval. EM pulse 114 indicates that there are two EM pulses in the Active interval. The Porch interval indicates that the pixel circuit is in the non-display area. At this time, the timing of the EM pulse is 112 at EM(end). When one EM pulse enters the non-display area of ​​the pixel circuit in a frame, only two EM pulses are actually being driven in the pixel circuit. When the OLED anode is reset, the load of the power supply connected to its anode is reduced by 1 / 3, which makes the OLED initialization more complete than in other time periods, resulting in a darker and uneven display, i.e., screen splitting.

[0038] like Figure 4 As shown, this application embodiment provides a pixel circuit, including:

[0039] Light-emitting element 1;

[0040] The driving module 2 connects the light-emitting element 1 to the power supply module; the driving module 2 controls the light-emitting element 1 to turn on or off according to the input first control signal.

[0041] A first compensation module 3 is connected to the driving module 2. The first compensation module 3 is used to perform threshold voltage compensation on the driving module 2 according to the input second control signal. The first compensation module 3 is also used to input a display control signal, which is used to control the pixel circuit to be in the display area or the non-display area.

[0042] The second compensation module 4 has one end connected to the first electrode of the light-emitting element 1 and the other end connected to the first power supply vint2. The second compensation module 4 is used to be in a direct path or a load path according to the input second control signal and third control signal. When the pixel circuit is in the display area, the light-emitting element 1 is connected to the first power supply through the direct path; when the pixel circuit is in the non-display area, the light-emitting element 1 is connected to the first power supply through the load path.

[0043] Optionally, the light-emitting element 1 may be a light-emitting diode (LED). For example, when the light-emitting element 1 is a LED, the first electrode of the light-emitting element 1 may be the anode of the LED. Optionally, the first power supply vint2 may be used to provide the initialization potential of the light-emitting element 1. For example, when the light-emitting element 1 is a LED, the first power supply vint2 may be used to provide the anode initialization potential of the LED.

[0044] Optionally, the power supply module is used to provide power to the pixel circuit. For example, the driving module 2 is connected to the power supply module, so that the power supply module can supply power to the devices in the driving module 2; or the first compensation module 3 can also be connected to the power supply module, so that the power supply module can provide power to the first compensation module 3, etc. The embodiments of this application are not limited thereto.

[0045] Optionally, the first control signal can be a pulse signal. The first control signal can be generated by the processor and transmitted to the driving module 2 in the pixel circuit. Under the action of the first control signal, the driving module 2 can control the light-emitting element 1 to turn on or off, so that the display screen composed of the pixel circuit can realize the display function under the control of the processor.

[0046] Optionally, the second control signal can be a pulse signal. This second control signal can be generated by the processor and transmitted to the first compensation module 3 in the pixel circuit. Under the action of the second control signal, the first compensation module 3 can perform threshold voltage compensation on the driving module 2 (that is, compensate the threshold voltage (Vth) of the TFT tube in the driving module 2). The display control signal can also be called a data signal (DATA), that is, display information data.

[0047] Optionally, the third control signal can be a pulse signal, which can be generated by the processor and transmitted to the second compensation module 4 in the pixel circuit. Under the action of the second and third control signals, the second compensation module 4 can initialize the light-emitting element 1.

[0048] Optionally, the direct path is a non-load path, meaning that the first power supply vint2 is connected to the light-emitting element 1 without passing through a load, providing an initialization potential to the light-emitting element 1. A load path, on the other hand, means that the first power supply vint2 is connected to the light-emitting element 1 with a load passing through it, providing an initialization potential to the light-emitting element 1.

[0049] In this embodiment, while the first compensation module 3 and the second compensation module 4 are controlled by the same second control signal, the second compensation module 4 is further controlled to be in a direct path or a load path via a third control signal. Furthermore, when the pixel circuit is in the display area, the light-emitting element 1 is initialized by connecting to the first power supply vint2 through the direct path; when the pixel circuit is in the non-display area, the light-emitting element 1 is initialized by connecting to the first power supply through the load path. This ensures that the light-emitting element 1 achieves a consistent initialization level whether the pixel circuit is in the non-display area or the display area, avoiding screen splitting caused by inconsistent initialization levels of the light-emitting elements 1 in the pixel circuit.

[0050] Optionally, the second compensation module 4 includes: a switching unit and a load element R;

[0051] The first electrode of the light-emitting element 1 is connected to the first power supply vint2 through the switching unit and the load element R;

[0052] In this embodiment, when the switching unit controls the first electrode of the light-emitting element 1 to be directly connected to the first power supply according to the second control signal and the third control signal, the second compensation module 4 is in the direct-through path; when the switching unit controls the first electrode of the light-emitting element 1 to be connected to the first power supply through the load element R according to the second control signal and the third control signal, the second compensation module 4 is in the load path. In this embodiment, the switching unit is used to control whether the load element R is connected to the path between the first electrode of the light-emitting element 1 and the first power supply vint2. For example, when the switching unit controls the load element R to be connected to the path between the first electrode of the light-emitting element 1 and the first power supply vint2 under the action of the second control signal and the third control signal, the second compensation module 4 is in the load path; when the switching unit controls the load element R not to be connected to the path between the first electrode of the light-emitting element 1 and the first power supply vint2 under the action of the second control signal and the third control signal, the second compensation module 4 is in the direct-through path.

[0053] Optionally, the switching unit includes: a first switch T7 and a second switch T9; the first end of the first switch T7 is connected to the first end of the second switch T9 and the first end of the load element R, the second end of the first switch T7 is connected to the first electrode of the light-emitting element 1, and the second end of the second switch T9 and the second end of the load element R are both connected to the first power supply vint2; the control end of the first switch T7 is used to input the second control signal, and the control end of the second switch T9 is used to input the third control signal.

[0054] See further Figure 4 The second control signal input to the control terminal of the first switch T7 is... Figure 4 The control signal Pscan1 is used to control the first switch T7 to turn on or off; the third control signal input to the control terminal of the second switch T9 is... Figure 4 The control signal Pscan3 is used to control the second switch T9 to be turned on or off.

[0055] Optionally, the first switch T7 and the second switch T9 can be selected as TFT transistors, or other switching transistors, etc., and the embodiments of this application are not limited thereto.

[0056] Wherein, when the first switch T7 is in the conducting state under the action of the second control signal, and the second switch T9 is in the conducting state under the action of the third control signal, the second compensation module 4 is in the direct path; when the first switch T7 is in the conducting state under the action of the second control signal, and the second switch T9 is in the de-conducting state under the action of the third control signal, the second compensation module 4 is in the load path.

[0057] In this embodiment, by setting a first switch T7 and a second switch T9 in the switching unit, when the pixel circuit is in the display area, the first switch T7 can use the same control signal as the first compensation module to initialize the light-emitting element 1; when the pixel circuit is in the non-display area, the second switch T9 is controlled to introduce a load into the initialization path of the light-emitting element 1, so as to ensure that the light-emitting element 1 can obtain a consistent initialization degree when the pixel circuit is in the non-display area or the display area, and avoid the screen splitting phenomenon caused by the inconsistent initialization degree of the light-emitting element 1 in the pixel circuit.

[0058] Optionally, the load element R can be a resistor. Specific resistor parameters can be set according to the specific pixel circuit, initialization voltage, etc., and are not specifically limited in this embodiment.

[0059] Optionally, the driving module 2 includes: a main driving switch T1, a positive power switch T5, and a negative power switch T6; the first end of the positive power switch T5 is connected to the power supply module, the second end of the positive power switch T5 is connected to the first end of the main driving switch T1, the second end of the main driving switch T1 is connected to the first end of the negative power switch T6, the second end of the negative power switch T6 is connected to the first electrode of the light-emitting element 1, and the second electrode of the light-emitting element 1 is connected to the power supply module;

[0060] The control terminals of the positive power switch T5 and the negative power switch T6 are both input with the first control signal; the control terminal of the main drive switch T1 is connected to the first compensation module 3.

[0061] For example, when the light-emitting element 1 is a light-emitting diode (LED), the first electrode of the light-emitting element 1 is the anode of the LED, and the second electrode of the light-emitting element 1 is the cathode of the LED. That is, the second terminal of the negative power switch T6 is connected to the anode of the LED, and the cathode of the LED is connected to the power supply module.

[0062] Optionally, the main drive switch T1, the positive power switch T5, and the negative power switch T6 can be selected as TFT transistors, or other switching transistors, etc., and the embodiments of this application are not limited thereto.

[0063] See further Figure 4 The first control signal input to the control terminals of the positive power switch T5 and the negative power switch T6 is... Figure 4 The control signal EM is used to control the light-emitting element 1 to turn on or off.

[0064] In this embodiment, the first control signal is a pulse signal used to control the on and off states of the positive power switch T5 and the negative power switch T6. For example, when the first control signal controls the positive power switch T5 and the negative power switch T6 to be in the on state, the light-emitting element 1 is turned on and emits light; when the first control signal controls the positive power switch T5 and the negative power switch T6 to be in the off state, the light-emitting element 1 is turned off.

[0065] Optionally, the power supply module includes: a positive power supply ELVDD and a negative power supply ELVSS; the first terminal of the positive power switch T5 is connected to the positive power supply ELVDD, and the second electrode of the light-emitting element 1 is connected to the negative power supply ELVSS.

[0066] For example, when the light-emitting element 1 is a light-emitting diode, the cathode of the light-emitting diode is connected to the negative power supply ELVSS.

[0067] Optionally, the first compensation module 3 includes: a voltage storage unit 31 and a third switch T8; the voltage storage unit 31 is connected to the first terminal, the second terminal and the control terminal of the main drive switch T1 respectively, and the voltage storage unit 31 is used to input the display control signal and generate a first voltage difference;

[0068] The first terminal of the third switch T8 is connected to the second power supply Vint3, the second terminal of the third switch T8 is connected to the first terminal of the main drive switch T1, and the control terminal of the third switch T8 is used to input the second control signal; wherein, when the third switch T8 is in the conducting state under the action of the second control signal, the second power supply Vint3 compensates for the first voltage difference.

[0069] See further Figure 4 The display control signal input to the voltage storage unit 31 is... Figure 4 The DATA signal is used to display intelligence data; the second control signal input to the control terminal of the third switch T8 is... Figure 4 The control signal Pscan1 is used to control the third switch T8 to be turned on or off.

[0070] Optionally, the third switch T8 can be a TFT transistor or other switching transistors, etc., and the embodiments of this application are not limited thereto.

[0071] In this embodiment, the first compensation module 3 is used to compensate the threshold voltage of the drive module 2, that is, the first compensation module 3 is used to compensate the threshold voltage of the main drive switch T1 in the drive module 2. Specifically, the voltage storage unit 31 is used to store voltage and generate a first voltage difference (for example, the first voltage difference is the difference between the voltage value of the display control signal and the threshold voltage of the main drive switch T1). The second power supply Vint3 is used to compensate the threshold voltage of the main drive switch T1 (that is, to compensate the first voltage difference).

[0072] Optionally, the voltage storage unit 31 includes: an initialization subunit, a fourth switch T3, and a fifth switch T2;

[0073] The initialization subunit is connected to the power supply module, the third power supply Vint1, and the control terminal of the main drive switch T1, respectively. The initialization subunit is also connected to the second terminal of the main drive switch T1 through the fourth switch T3. The first terminal of the fifth switch T2 is connected to the first terminal of the main drive switch T1.

[0074] The initialization subunit is used to initialize the voltage at the control terminal of the main drive switch T1 according to the input fourth control signal, and the main drive switch T1 is in the on state; the second terminal of the fifth switch T2 receives the display control signal, and generates the first voltage difference when the fourth switch T3 and the fifth switch T2 are in the on state;

[0075] Wherein, the first voltage difference is the difference between the voltage value of the display control signal and the threshold voltage of the main drive switch T1.

[0076] See further Figure 4 The control terminal of the fourth switch T3 can receive the control signal Nscan 1 to control the fourth switch T3 to be turned on or off; the control terminal of the fifth switch T2 can also receive the control signal Pscan 2 to control the fifth switch T2 to be turned on or off; the fourth control signal input to the initialization subunit is also... Figure 3 The control signal Nscan 2 is used. Optionally, the control signals Nscan 1 and Nscan 2 can be pulse signals.

[0077] In this embodiment, the initialization subunit can obtain and store electrical energy from the power supply module. Specifically, when the fourth switch T3 is turned on under the action of the control signal Nscan 1, the initialization subunit is connected to the third power supply Vint1. At this time, the voltage at the control terminal of the main drive switch T1 is the output voltage value of the third power supply Vint1 (that is, the voltage at the control terminal of the main drive switch T1 is initialized, which is to say, the initialization subunit is initialized), and the main drive switch T1 is in the on state. Further, when the fourth switch T3 and the fifth switch T2 are in the on state, the first and second terminals of the main drive switch T1 are shorted (if the main drive switch T1 is a TFT transistor, it is equivalent to the source and gate being shorted) until the potential at the control terminal of the main drive switch T1 reaches the first voltage difference and is cut off, thereby generating the first voltage difference.

[0078] Optionally, the initialization subunit includes: an energy storage element C and a sixth switch T4;

[0079] The first end of the energy storage element C is connected to the power supply module, the second end of the energy storage element C is connected to the first end of the sixth switch T4, and the second end of the sixth switch T4 is connected to the third power supply Vint1; the control end of the sixth switch T4 is used to input the fourth control signal.

[0080] When the sixth switch T4 is in the conducting state under the action of the fourth control signal, it initializes the control terminal of the main drive switch T1, and the initialization voltage is the output voltage of the third power supply Vint1.

[0081] See further Figure 4 The fourth control signal input to the control terminal of the sixth switch T4 is also known as... Figure 4 The control signal Nscan 2 is used to control the sixth switch T4 to turn on or off.

[0082] In this embodiment, the first terminal of the energy storage element C can be connected to the positive power supply ELVDD in the power supply module. The energy storage element C can obtain and store electrical energy from the power supply module. Specifically, when the fourth switch T3 is turned on under the action of the control signal Nscan 1, the energy storage element C is connected to the third power supply Vint1. At this time, the voltage at the control terminal of the main drive switch T1 is the output voltage value of the third power supply Vint1 (that is, the voltage at the control terminal of the main drive switch T1 is initialized, which is also the initialization of the energy storage element C), and the main drive switch T1 is in the on state.

[0083] The following describes the operation of the pixel circuit in an embodiment of this application, using timing diagrams of the control signals for each switch:

[0084] Taking three EM pulses as an example, when one EM pulse enters the Porch interval, the second switch T9 closes, and a load element R (such as a resistor) is connected to the pixel circuit to compensate for the reduced load on the first power supply Vint2, ensuring that the anode initialization level is consistent between the Porch and Active intervals. Figure 5 As shown:

[0085] Step 1: The timing sequence of the control signals for each switch is timing sequence 101;

[0086] At this time, the sixth switch T4 is opened, and the potential at point A is the output voltage of the third power supply Vint1. The energy storage element C (such as a capacitor) is charged, realizing the initialization of the energy storage element C (that is, the initialization of the voltage at the control terminal of the main drive switch T1). That is, after the first step is completed, the potential at point A is the output voltage of the third power supply Vint1.

[0087] Step 2: The timing sequence of the control signals for each switch is timing sequence 102;

[0088] At this time, the fifth switch T2 and the fourth switch T3 are turned on. The source and gate of the main drive switch T1 are short-circuited, and the potential at point A is greater than |Vth|. That is, at this time, the main drive switch T1 and the fourth switch T3 form a diode. The main drive switch T1 is turned on until the potential at point A becomes Vdata-|Vth| and then it is turned off, realizing the storage of the voltage difference Vdata-|Vth| (i.e., the first voltage difference), which prepares for the subsequent voltage compensation of the main drive switch T1.

[0089] Step 3: The timing sequence of the control signals for each switch is timing sequence 103;

[0090] At this time, the first switch T7, the third switch T8, and the second switch T9 are open;

[0091] When the first switch T7 is turned on, the anode of the light-emitting element (i.e., OLED) is connected to the first power supply Vint2, and the cathode is connected to the negative power supply ELVSS. A circuit is formed between the anode and cathode of the light-emitting element (i.e., OLED), which initializes the anode of the light-emitting element (i.e., OLED). At this time, the potential at point A is Vdata-|Vth|, and the potential of the anode of the light-emitting element (i.e., OLED) is the voltage of the first power supply Vint2.

[0092] When the third switch T8 is turned on, the source of the main drive switch T1 is connected to the second power supply Vint3 to perform bias compensation on the main drive switch T1.

[0093] When the second switch T9 is turned on, the load element R (such as a resistor) is not connected in series with the pixel circuit.

[0094] Step 4: The timing sequence of the control signals for each switch is timing sequence 105;

[0095] At this time, the positive power switch T5 and the negative power switch T6 are open. The current Ids passing through the main drive switch T1 is (1 / 2)K*[ELVDD-(Vdata-|Vth|)-|Vth|]. 2 = (1 / 2)K*(Vdd-Vdata) 2 Where K = Cox * μ * W / L (μ is the surface mobility, a parameter of silicon material; Cox is the gate capacitance per unit area, a process parameter; W and L are the channel width and length, respectively, physical parameters), the current flows through the light-emitting element (i.e. OLED), the OLED starts to emit light, and it is maintained for one frame.

[0096] Step 5: The timing sequence of the control signals for each switch is timing sequence 106;

[0097] At this time, the positive power switch T5 and the negative power switch T6 are turned off, and the first switch T7, the third switch T8, and the second switch T9 are turned on, and the action of the third step above is performed (repeated twice).

[0098] Step 6: The timing sequence of the control signals for each switch is timing 111;

[0099] At this time, the positive power switch T5, the negative power switch T6, and the second switch T9 are turned off, while the first switch T7 and the third switch T8 are turned on. The load element R (such as a resistor) is connected in series in the pixel circuit to compensate for the load of the first power supply vint2.

[0100] When no EM pulse enters the Porch interval, the second switch T9 opens, and no load element R (such as a resistor) is connected in the pixel circuit. Normal anode reset is then performed. Figure 6 As shown:

[0101] Step 1: The timing sequence of the control signals for each switch is timing sequence 101;

[0102] At this time, the sixth switch T4 is turned on, the potential at point A is the third power supply Vint1, and the energy storage element C (such as a capacitor) is charged, thus initializing the energy storage element C (such as a capacitor). That is, after the first step is completed, the potential at point A is the voltage of the third power supply Vint1.

[0103] Step 2: The timing sequence of the control signals for each switch is timing sequence 102;

[0104] At this time, T2 and T3 are turned on. The source and gate of T1 are shorted, and the potential at point A is greater than |Vth|. That is, at this time, T1 and T3 form a component. T1 is turned on until the potential at point A becomes Vdata-|Vth| and then it is turned off, realizing the storage of the voltage difference Vdata-|Vth|, which prepares for the subsequent voltage compensation of T1.

[0105] Step 3: The timing sequence of the control signals for each switch is timing sequence 103;

[0106] At this time, the first switch T7, the third switch T8, and the second switch T9 are open;

[0107] When the first switch T7 is turned on, the anode of the light-emitting element (i.e., OLED) is connected to the first power supply Vint2, and the cathode is connected to the negative power supply ELVSS. A circuit is formed between the anode and cathode of the light-emitting element (i.e., OLED), which initializes the anode of the light-emitting element (i.e., OLED). At this time, the potential at point A is Vdata-|Vth|, and the potential of the anode of the light-emitting element (i.e., OLED) is the voltage of the first power supply Vint2.

[0108] When the third switch T8 is turned on, the source of T1 is connected to the second power supply Vint3 to perform bias compensation on T1.

[0109] When the second switch T9 is turned on, the load element R (such as a resistor) is not connected in series with the pixel circuit.

[0110] Step 4: The timing sequence of the control signals for each switch is timing sequence 105;

[0111] At this time, the positive power switch T5 and the negative power switch T6 are open. The current Ids passing through the main drive switch T1 is (1 / 2)K*[ELVDD-(Vdata-|Vth|)-|Vth|]. 2 = (1 / 2)K*(Vdd-Vdata) 2Where K = Cox * μ * W / L (μ is the surface mobility, a parameter of silicon material; Cox is the gate capacitance per unit area, a process parameter; W and L are the channel width and length, respectively, physical parameters), the current flows through the light-emitting element (i.e. OLED), the OLED starts to emit light, and it is maintained for one frame.

[0112] Step 5: The timing sequence of the control signals for each switch is timing sequence 106;

[0113] At this time, the positive power switch T5 and the negative power switch T6 are turned off, and the first switch T7, the third switch T8, and the second switch T9 are turned on, and the action of the third step above is performed (repeated twice).

[0114] It should be added that, Figure 4 and Figure 5 In this sequence, timing 104 indicates the shutdown time of the first EM pulse of the data access frame, executing steps one, two, and three above. Timing 107 indicates the frame synchronization signal of the nth frame. Timing 108 indicates that the control signal Pscan3 controls the second switch T9 to close, and the load element R (e.g., a resistor) compensates. Timing 109 indicates the Active interval. Timing 110 indicates the Porch interval. Timing 111 indicates the second and third EM pulses, repeating steps one, two, and three above.

[0115] The above-described solution of this application, by setting a second switch T9 and a load element R (such as a resistor) in the anode initialization path of the light-emitting element (i.e., OLED), ensures that the anode reset degree of the light-emitting element (i.e., OLED) is consistent in both the Porch and Active regions of the pixel circuit. This avoids the load variation of the first power supply Vint2 in different stages of the pixel circuit, thereby solving the screen splitting problem. Furthermore, considering the differences between pixel circuit driving schemes of different electronic devices, which may lead to different EM pulse counts and Porch widths, the above-described solution of this application can solve the screen splitting problem without adding additional circuit outputs, such as through separate output control via a driver chip, without affecting the product bezel and display area.

[0116] This application also provides an electronic device including the pixel circuit described above, which can implement various embodiments of the pixel circuit and achieve the same technical effect. To avoid repetition, it will not be described again here.

[0117] like Figure 7 As shown, this application embodiment also provides a pixel circuit control method, applied to the electronic device described above, the electronic device including the pixel circuit described above.

[0118] The method includes the following steps:

[0119] Step 71: During the first time period, output the second control signal to the first compensation module, and output the second control signal and the third control signal to the second compensation module, thereby controlling the first compensation module to perform threshold voltage compensation on the drive module, and simultaneously controlling the second compensation module to be in the through path.

[0120] In this embodiment, during the first time period, the first compensation module is controlled by the second control signal to perform threshold voltage compensation on the driving module, and the second compensation module is controlled by the second and third control signals to initialize the light-emitting element using a direct path (i.e., initializing the light-emitting element without connecting a load; if the light-emitting element is a light-emitting diode, that is, initializing the anode of the light-emitting diode). See the above for details. Figure 5 Timing from 101 to 103.

[0121] Step 72: During the second time period, output the first control signal to the driving module to control the light-emitting element to turn on.

[0122] In this embodiment, the second time period follows the first time period, meaning that the light-emitting element can be turned on after the initialization of the light-emitting element and the compensation of the threshold voltage of the driving module are completed. See the above for details. Figure 5 At timing 105, the OLED starts emitting light and maintains it for one frame.

[0123] Step 73: During the third time period, output the second control signal to the first compensation module, and output the second control signal and the third control signal to the second compensation module, thereby controlling the first compensation module to perform threshold voltage compensation on the drive module, and simultaneously controlling the second compensation module to be in the load path.

[0124] In this embodiment, the third time period follows the second time period. Specifically, during the third time period, threshold voltage compensation for the driving module continues, and the light-emitting element is initialized simultaneously. Specifically, during the third time period, the first compensation module performs threshold voltage compensation for the driving module via a second control signal, and the second compensation module is controlled to be in a load path to initialize the light-emitting element via the second and third control signals (i.e., initializing the light-emitting element when a load is connected; if the light-emitting element is a light-emitting diode, initializing the anode of the light-emitting diode). See [link to documentation] for details. Figure 5 Timing 111 in the middle.

[0125] In the above scheme, during the first time period, the second control signal controls the first compensation module to perform threshold voltage compensation on the driving module, and the second control signal and the third control signal control the second compensation module to initialize the light-emitting element using a direct path. During the second time period, after the initialization of the light-emitting element and the threshold voltage compensation of the driving module are completed, the light-emitting element is turned on. During the third time period, the second control signal controls the first compensation module to perform threshold voltage compensation on the driving module, and the second control signal and the third control signal control the second compensation module to initialize the light-emitting element in a load path. This ensures that the light-emitting elements in the pixel circuit always receive a consistent initialization level, avoiding screen splitting caused by inconsistent initialization levels of the light-emitting elements in the pixel circuit.

[0126] Optionally, the first time period and the second time period are the time periods during which the pixel circuit is in the display area.

[0127] Optionally, the third time period is the time period during which the pixel circuit is in the non-display area and the first control signal controls the light-emitting element to turn on.

[0128] In this embodiment, when the pixel circuit is in the display area, the first compensation module is controlled by the second control signal to perform threshold voltage compensation on the driving module, and the second compensation module is controlled by the second and third control signals to initialize the light-emitting element using a direct path. When the pixel circuit is in the non-display area, the first compensation module is controlled by the second control signal to perform threshold voltage compensation on the driving module, and the second compensation module is controlled by the second and third control signals to initialize the light-emitting element in a load path. This ensures that the light-emitting element always achieves a consistent initialization level when the pixel circuit is in the display area or non-display area, avoiding screen splitting caused by inconsistent initialization levels of the light-emitting elements in the pixel circuit.

[0129] The pixel circuit control method provided in this application can be executed by a pixel circuit control device. This application uses the example of a pixel circuit control device executing the pixel circuit control method to illustrate the pixel circuit control device provided in this application.

[0130] like Figure 8 As shown, this application embodiment provides a pixel circuit control device 800, applied to the electronic device described above. The device 800 includes:

[0131] The first control module 810 is configured to output the second control signal to the first compensation module and output the second control signal and the third control signal to the second compensation module during a first time period, thereby controlling the first compensation module to perform threshold voltage compensation on the drive module and simultaneously controlling the second compensation module to be in the through path.

[0132] The second control module 820 is used to output the first control signal to the driving module during the second time period to control the light-emitting element to turn on.

[0133] The third control module 830 is used to output the second control signal to the first compensation module and the second control signal and the third control signal to the second compensation module during the third time period, thereby controlling the first compensation module to perform threshold voltage compensation on the drive module and simultaneously controlling the second compensation module to be in the load path.

[0134] Optionally, the first time period and the second time period are the time periods during which the pixel circuit is in the display area.

[0135] Optionally, the third time period is the time period during which the pixel circuit is in the non-display area and the first control signal controls the light-emitting element to turn on.

[0136] The apparatus in this embodiment, during a first time period, controls the first compensation module to perform threshold voltage compensation on the driving module via a second control signal, and controls the second compensation module to initialize the light-emitting element using a direct path via the second and third control signals; during a second time period, after completing the initialization of the light-emitting element and the threshold voltage compensation of the driving module, controls the light-emitting element to turn on; during a third time period, controls the first compensation module to perform threshold voltage compensation on the driving module via the second control signal, and controls the second compensation module to initialize the light-emitting element in a load path via the second and third control signals. This ensures that the light-emitting elements in the pixel circuit always receive a consistent degree of initialization, avoiding screen splitting caused by inconsistent initialization degrees of the light-emitting elements in the pixel circuit.

[0137] The audio data processing device in this application embodiment can be an electronic device or a component within an electronic device, such as an integrated circuit or a chip. The electronic device can be a terminal or other devices besides a terminal. For example, the electronic device can be a mobile phone, tablet computer, laptop computer, PDA, in-vehicle electronic device, mobile internet device (MID), augmented reality (AR) / virtual reality (VR) device, robot, wearable device, ultra-mobile personal computer (UMPC), netbook, or personal digital assistant (PDA), etc. It can also be a server, network attached storage (NAS), personal computer (PC), television set (TV), ATM, or self-service machine, etc. This application embodiment does not specifically limit the device.

[0138] The audio data processing device in this application embodiment can be a device with an operating system. This operating system can be Android, iOS, or other possible operating systems; this application embodiment does not specifically limit the specific operating system used.

[0139] The audio data processing device provided in this application embodiment can achieve... Figure 7 The various processes implemented in the method implementation examples will not be described again here to avoid repetition.

[0140] Optionally, such as Figure 9 As shown, this application embodiment also provides an electronic device 900, including a processor 901 and a memory 902. The memory 902 stores a program or instructions that can run on the processor 901. When the program or instructions are executed by the processor 901, they implement the various steps of the above-described audio data processing method embodiment and can achieve the same technical effect. To avoid repetition, they will not be described again here.

[0141] It should be noted that the electronic devices in the embodiments of this application include the mobile electronic devices and non-mobile electronic devices described above.

[0142] Figure 10 A schematic diagram of the hardware structure of an electronic device to implement an embodiment of this application.

[0143] The electronic device 1000 includes, but is not limited to, components such as: radio frequency unit 1001, network module 1002, audio output unit 1003, input unit 1004, sensor 1005, display unit 1006, user input unit 1007, interface unit 1008, memory 09, and processor 1010.

[0144] Those skilled in the art will understand that the electronic device 1000 may also include a power supply (such as a battery) for supplying power to various components. The power supply may be logically connected to the processor 1010 through a power management system, thereby enabling functions such as managing charging, discharging, and power consumption through the power management system. Figure 10 The electronic device structure shown does not constitute a limitation on the electronic device. The electronic device may include more or fewer components than shown, or combine certain components, or have different component arrangements, which will not be elaborated here.

[0145] The processor 1010 is configured to: output the second control signal to the first compensation module during a first time period, and output the second control signal and the third control signal to the second compensation module, thereby controlling the first compensation module to perform threshold voltage compensation on the driving module, and simultaneously controlling the second compensation module to be in the through path.

[0146] During the second time period, the first control signal is output to the driving module to control the light-emitting element to turn on;

[0147] During the third time period, the second control signal is output to the first compensation module, and the second control signal and the third control signal are output to the second compensation module to control the first compensation module to perform threshold voltage compensation on the drive module, while controlling the second compensation module to be in the load path.

[0148] Optionally, the first time period and the second time period are the time periods during which the pixel circuit is in the display area.

[0149] Optionally, the third time period is the time period during which the pixel circuit is in the non-display area and the first control signal controls the light-emitting element to turn on.

[0150] In the electronic device of this application embodiment, during a first time period, a second control signal controls a first compensation module to perform threshold voltage compensation on a driving module, and the second compensation module is controlled by the second and third control signals to initialize the light-emitting element using a direct path. During a second time period, after the initialization of the light-emitting element and the threshold voltage compensation of the driving module are completed, the light-emitting element is turned on. During a third time period, the second control signal controls the first compensation module to perform threshold voltage compensation on the driving module, and the second compensation module is controlled by the second and third control signals to initialize the light-emitting element in a load path. This ensures that the light-emitting elements in the pixel circuit always achieve a consistent initialization level, avoiding screen splitting caused by inconsistent initialization levels of the light-emitting elements in the pixel circuit.

[0151] It should be understood that, in this embodiment, the input unit 1004 may include a graphics processing unit (GPU) 10041 and a microphone 10042. The GPU 10041 processes image data of still images or videos obtained by an image capture device (such as a camera) in video capture mode or image capture mode. The display unit 1006 may include a display panel 10061, which may be configured in the form of a liquid crystal display, an organic light-emitting diode, or the like. The user input unit 1007 includes a touch panel 10071 and at least one of other input devices 10072. The touch panel 10071 is also called a touch screen. The touch panel 10071 may include a touch detection device and a touch controller. Other input devices 10072 may include, but are not limited to, physical keyboards, function keys (such as volume control buttons, power buttons, etc.), trackballs, mice, and joysticks, which will not be described in detail here.

[0152] The memory 1009 can be used to store software programs and various data. The memory 1009 may primarily include a first storage area for storing programs or instructions and a second storage area for storing data. The first storage area may store the operating system, application programs or instructions required for at least one function (such as sound playback, image playback, etc.). Furthermore, the memory 1009 may include volatile memory or non-volatile memory, or both. The 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 can be random access memory (RAM), static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct memory bus RAM (DRRAM). The memory 1009 in this embodiment includes, but is not limited to, these and any other suitable types of memory.

[0153] The processor 1010 may include one or more processing units; optionally, the processor 1010 integrates an application processor and a modem processor, wherein the application processor mainly handles operations involving the operating system, user interface, and applications, and the modem processor mainly handles wireless communication signals, such as a baseband processor. It is understood that the aforementioned modem processor may also not be integrated into the processor 1010.

[0154] This application also provides a readable storage medium storing a program or instructions. When the program or instructions are executed by a processor, they implement the various processes of the above-described audio data processing method embodiments and achieve the same technical effect. To avoid repetition, they will not be described again here.

[0155] The processor is the processor in the electronic device described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk.

[0156] This application embodiment also provides a chip, which includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run programs or instructions to implement the various processes of the above-described pixel circuit control method embodiment and achieve the same technical effect. To avoid repetition, it will not be described again here.

[0157] It should be understood that the chip mentioned in the embodiments of this application may also be referred to as a system-on-a-chip, system chip, chip system, or system-on-a-chip, etc.

[0158] This application provides a computer program product stored in a storage medium. The program product is executed by at least one processor to implement the various processes of the pixel circuit control method embodiment described above, achieving the same technical effects. To avoid repetition, further details are omitted here. The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably.

[0159] Although preferred embodiments of the present application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the embodiments of the present application.

[0160] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes said element.

[0161] The above describes the preferred embodiments of this application. It should be noted that those skilled in the art can make several improvements and modifications without departing from the principles described in this application, and these improvements and modifications are also within the protection scope of this application.

Claims

1. A pixel circuit, characterized in that, include: Light-emitting elements; The driving module is used to connect the light-emitting element to the power supply module. The driving module controls the light-emitting element to turn on or off according to the input first control signal; A first compensation module is connected to the driving module. The first compensation module is used to perform threshold voltage compensation on the driving module according to the input second control signal. The first compensation module is also used to input a display control signal, which is used to control the pixel circuit to be in the display area or the non-display area. The display area refers to the timing active interval of the pixel circuit, and the non-display area refers to the timing pitch interval of the pixel circuit. The second compensation module has one end connected to the first electrode of the light-emitting element and the other end connected to the first power supply. The second compensation module is used to be in a direct path or a load path according to the input second control signal and third control signal. When the pixel circuit is in the display area, the light-emitting element is connected to the first power supply through the direct path; when the pixel circuit is in the non-display area, the light-emitting element is connected to the first power supply through the load path.

2. The pixel circuit according to claim 1, characterized in that, The second compensation module includes: a switching unit and a load element; The first electrode of the light-emitting element is connected to the first power supply through the switching unit and the load element; When the switching unit controls the first electrode of the light-emitting element to be directly connected to the first power supply according to the second control signal and the third control signal, the second compensation module is in the direct path; When the switching unit controls the first electrode of the light-emitting element to be connected to the first power supply through the load element according to the second control signal and the third control signal, the second compensation module is in the load path.

3. The pixel circuit according to claim 2, characterized in that, The switching unit includes: a first switch and a second switch; The first terminal of the first switch is connected to the first terminal of the second switch and the first terminal of the load element, respectively. The second terminal of the first switch is connected to the first electrode of the light-emitting element. The second terminal of the second switch and the second terminal of the load element are both connected to the first power supply. The control terminal of the first switch is used to input the second control signal, and the control terminal of the second switch is used to input the third control signal. Wherein, when the first switch is in the conducting state under the action of the second control signal, and the second switch is in the conducting state under the action of the third control signal, the second compensation module is in the direct path; when the first switch is in the conducting state under the action of the second control signal, and the second switch is in the off state under the action of the third control signal, the second compensation module is in the load path.

4. The pixel circuit according to claim 2 or 3, characterized in that, The load element is a resistor.

5. The pixel circuit according to claim 1, characterized in that, The drive module includes: a main drive switch, a positive power switch, and a negative power switch; The first terminal of the positive power switch is connected to the power supply module, the second terminal of the positive power switch is connected to the first terminal of the main drive switch, the second terminal of the main drive switch is connected to the first terminal of the negative power switch, the second terminal of the negative power switch is connected to the first electrode of the light-emitting element, and the second electrode of the light-emitting element is connected to the power supply module. The control terminals of both the positive and negative power switches receive the first control signal; the control terminal of the main drive switch is connected to the first compensation module.

6. The pixel circuit according to claim 5, characterized in that, The power supply module includes: a positive power supply and a negative power supply; The first terminal of the positive power switch is connected to the positive power source, and the second electrode of the light-emitting element is connected to the negative power source.

7. The pixel circuit according to claim 5, characterized in that, The first compensation module includes: a voltage storage unit and a third switch; The voltage storage unit is connected to the first terminal, the second terminal, and the control terminal of the main drive switch, respectively. The voltage storage unit is used to input the display control signal and generate the first voltage difference. The first terminal of the third switch is connected to the second power supply, the second terminal of the third switch is connected to the first terminal of the main drive switch, and the control terminal of the third switch is used to input the second control signal. When the third switch is in the conducting state under the action of the second control signal, the second power supply compensates for the first voltage difference.

8. The pixel circuit according to claim 7, characterized in that, The voltage storage unit includes: an initialization subunit, a fourth switch, and a fifth switch; The initialization subunit is connected to the power supply module, the third power supply, and the control terminal of the main drive switch, respectively. The initialization subunit is also connected to the second terminal of the main drive switch through the fourth switch; the first terminal of the fifth switch is connected to the first terminal of the main drive switch. The initialization subunit is used to initialize the voltage at the control terminal of the main drive switch according to the input fourth control signal, and the main drive switch is in the on state; the second terminal of the fifth switch receives the display control signal, and generates the first voltage difference when the fourth switch and the fifth switch are in the on state; Wherein, the first voltage difference is the difference between the voltage value of the display control signal and the threshold voltage of the main drive switch.

9. The pixel circuit according to claim 8, characterized in that, The initialization subunit includes: an energy storage element and a sixth switch; The first end of the energy storage element is connected to the power supply module, the second end of the energy storage element is connected to the first end of the sixth switch, and the second end of the sixth switch is connected to the third power source; the control end of the sixth switch is used to input the fourth control signal. When the sixth switch is in the conducting state under the action of the fourth control signal, the control terminal of the main drive switch is initialized, and the initialization voltage is the output voltage of the third power supply.

10. An electronic device, characterized in that, Includes the pixel circuit as described in any one of claims 1 to 9.

11. A method for controlling a pixel circuit, characterized in that, Applied to the electronic device of claim 10, the method includes: During the first time period, the second control signal is output to the first compensation module, and the second control signal and the third control signal are output to the second compensation module to control the first compensation module to perform threshold voltage compensation on the drive module, while controlling the second compensation module to be in the through path. During the second time period, the first control signal is output to the driving module to control the light-emitting element to turn on; During the third time period, the second control signal is output to the first compensation module, and the second control signal and the third control signal are output to the second compensation module to control the first compensation module to perform threshold voltage compensation on the drive module, while controlling the second compensation module to be in the load path.

12. The pixel circuit control method according to claim 11, characterized in that, The first time period and the second time period are the time periods during which the pixel circuit is in the display area.

13. The control method for the pixel circuit according to claim 11, characterized in that, The third time period is the period during which the pixel circuit is in the non-display area and the first control signal controls the light-emitting element to turn on.

14. A control device for a pixel circuit, characterized in that, Applied to the electronic device of claim 10, the device comprises: The first control module is configured to output the second control signal to the first compensation module and output the second control signal and the third control signal to the second compensation module during a first time period, thereby controlling the first compensation module to perform threshold voltage compensation on the drive module and simultaneously controlling the second compensation module to be in the through path. The second control module is used to output the first control signal to the driving module during the second time period to control the light-emitting element to turn on. The third control module is used to output the second control signal to the first compensation module and output the second control signal and the third control signal to the second compensation module during the third time period, thereby controlling the first compensation module to perform threshold voltage compensation on the drive module and simultaneously controlling the second compensation module to be in the load path.

15. The control device for the pixel circuit according to claim 14, characterized in that, The first time period and the second time period are the time periods during which the pixel circuit is in the display area.

16. The control device for the pixel circuit according to claim 14, characterized in that, The third time period is the period during which the pixel circuit is in the non-display area and the first control signal controls the light-emitting element to turn on.

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