Display circuit, display method, display device, electronic equipment and storage medium

Abstract

The invention relates to a display circuit, a display method, a display device, electronic equipment and a storage medium. The circuit comprises a pixel driving circuit, a differential circuit and a display control circuit, the first input end of the differential circuit is connected with the negative voltage end of a light emitting diode of the pixel driving circuit, the second input end of the differential circuit is connected with the positive voltage end of the light emitting diode, and the display control circuit is connected with the first input end of the differential circuit. The differential output end of the differential circuit is connected with the feedback end of the display control circuit; the control end of the display control circuit is connected with the voltage receiving end of the pixel driving circuit. A pixel driving circuit, a differential circuit and a display control circuit are configured in a display circuit, the differential circuit collects fluctuating voltage, and then a display compensation circuit transmits compensated control voltage to the pixel driving circuit, so that the pixel driving circuit controls light emission according to the compensated control voltage, screen ripple noise is avoided, and the display quality is improved. And the water ripple phenomenon is effectively solved.

Description

Technical Field

[0001] This disclosure relates to the field of display technology, and in particular to display circuits, display methods, display devices, electronic devices, and storage media. Background Technology

[0002] Among related technologies, Organic Light-Emitting Diode (OLED) displays have become a very popular emerging flat panel display product both domestically and internationally. This is because OLED displays possess characteristics such as self-illumination, wide viewing angle, short response time, high luminous efficiency, wide color gamut, low operating voltage, thinness, the ability to manufacture large-size and flexible displays, and simple manufacturing processes. Furthermore, they also have the potential for low cost. However, in practical applications, achieving stable display effects requires high precision and stability of the voltage applied to the OLED. Even slight voltage variations can cause fluctuations in the luminous current, resulting in a "water ripple" phenomenon on the OLED display screen, affecting the user experience. Therefore, how to avoid the water ripple phenomenon caused by voltage changes is a problem that urgently needs to be solved. Summary of the Invention

[0003] To overcome the problems existing in related technologies, this disclosure provides a display circuit, display method, display device, electronic device, and storage medium.

[0004] According to a first aspect of the present disclosure, a display circuit is provided, the circuit including a pixel driving circuit, a differential circuit, and a display control circuit, wherein...

[0005] The first input terminal of the differential circuit is connected to the negative voltage terminal of the light-emitting diode of the pixel driving circuit, the second input terminal of the differential circuit is connected to the positive voltage terminal of the light-emitting diode, and the differential output terminal of the differential circuit is connected to the feedback terminal of the display control circuit.

[0006] The control terminal of the display control circuit is connected to the voltage receiving terminal of the pixel driving circuit.

[0007] In one embodiment, the differential circuit includes an operational amplifier, a first resistor, a second resistor, a third resistor, and a fourth resistor;

[0008] One end of the first resistor is connected to the inverting input terminal of the operational amplifier, and the other end of the first resistor serves as the first input terminal;

[0009] One end of the second resistor is connected to the non-inverting input terminal of the operational amplifier, and the other end of the second resistor serves as the second input terminal;

[0010] One end of the third resistor is connected to the inverting input terminal, and the other end of the third resistor is connected to the operational amplifier output terminal.

[0011] One end of the fourth resistor is connected to the positive input terminal, and the other end of the fourth resistor is grounded;

[0012] The operational amplifier output terminal serves as the differential output terminal of the differential circuit.

[0013] In one embodiment, the pixel driving circuit includes a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, a sixth transistor, a seventh transistor, a capacitor, and the light-emitting diode;

[0014] The first transistor has its gate connected to the first node, its drain connected to the second node, and its source connected to the third node;

[0015] The second transistor has its gate connected to the first enable terminal, its drain connected to the second node, and its source serving as the voltage receiving terminal of the pixel driving circuit and connected to the control terminal of the display control circuit. The first enable terminal is used to output a write enable signal, and the control terminal is used to output a control voltage signal.

[0016] The third transistor has its gate connected to the first enable terminal, its drain connected to the first node, and its source connected to the third node;

[0017] The fourth transistor has its gate connected to the second enable terminal, its drain connected to the first node, and its source connected to the first reference voltage terminal. The second enable terminal is used to output a reset enable signal, and the first reference voltage terminal is used to output a positive reference voltage.

[0018] The fifth transistor has its gate connected to the third enable terminal, its drain connected to the first driving voltage terminal, and its source connected to the fourth node. The third enable terminal is used to output a light-emitting enable signal, and the first driving voltage terminal is used to output a positive driving voltage.

[0019] The sixth transistor has its gate connected to the third enable terminal, its drain connected to the third node, and its source connected to the fourth node;

[0020] The seventh transistor has its gate connected to the second enable terminal, its drain serving as the positive voltage terminal and connected to the second reference voltage terminal, and its source connected to the fourth node. The second reference voltage terminal is used to output a reverse reference voltage.

[0021] One end of the capacitor is connected to the first node, and the other end is connected to the first reference voltage terminal;

[0022] One end of the light-emitting diode is connected to the fourth node, and the other end serves as the negative voltage terminal and is connected to the second driving voltage terminal, wherein the second driving voltage terminal is used to output the reverse driving voltage.

[0023] In one embodiment, the display control circuit includes a screen module, a driving module, and a processing module;

[0024] The feedback input terminal of the driving module serves as the feedback terminal of the display control circuit and is connected to the output terminal of the operational amplifier. The feedback output terminal of the driving module is connected to the compensation input terminal of the screen module.

[0025] The control voltage terminal of the screen module serves as the control terminal of the display control circuit and is connected to the source of the second transistor. The control input terminal of the screen module is connected to the control transmission terminal of the processing module.

[0026] According to a second aspect of the present disclosure, a display device is provided, including the display circuit described above.

[0027] According to a third aspect of the present disclosure, a display method is provided, applied to a display circuit, the circuit including a pixel driving circuit, a differential circuit, and a display control circuit, the method comprising:

[0028] The differential circuit acquires the fluctuation voltage corresponding to the pixel driving circuit, wherein the fluctuation voltage is calculated based on the terminal voltage of the light-emitting element included in the pixel driving circuit.

[0029] The display control circuit calculates a voltage compensation value based on the fluctuating voltage, determines the initial voltage data value of the pixel driving circuit, and calculates the target control voltage of the pixel driving circuit based on the voltage compensation value and the initial voltage data value.

[0030] The pixel driving circuit drives the light-emitting element to perform the display according to the target control voltage.

[0031] In one embodiment, acquiring the fluctuating voltage corresponding to the pixel driving circuit through the differential circuit includes:

[0032] The differential circuit is used to determine the light-emitting element in the pixel driving circuit and to collect the terminal voltage corresponding to the light-emitting element.

[0033] The fluctuation voltage corresponding to the pixel driving circuit is calculated based on the terminal voltage.

[0034] In one embodiment, the display control circuit includes a driving module;

[0035] The display control circuit calculates the voltage compensation value based on the fluctuating voltage, including:

[0036] The driving module receives the fluctuating voltage and performs analog-to-digital conversion on the fluctuating voltage to obtain the target fluctuation difference.

[0037] Read the preset fluctuation difference value, and calculate the voltage compensation value based on the target fluctuation difference value and the preset fluctuation difference value, wherein the preset fluctuation difference value is stored in the driver memory corresponding to the driver module.

[0038] In one embodiment, the display control circuit includes a screen module and a processing module;

[0039] The display control circuit calculates the target control voltage of the pixel driving circuit based on the voltage compensation value and the initial voltage data value, including:

[0040] The voltage compensation value is sent to the screen module via the drive module;

[0041] The screen module receives the initial voltage data value sent by the processing module, calculates the target voltage data value based on the voltage compensation value and the initial voltage data value, and performs digital-to-analog conversion on the target voltage data value to obtain the target control voltage of the pixel driving circuit.

[0042] According to a fourth aspect of the present disclosure, a display device is provided, comprising a pixel driving unit, a differential unit, and a display control unit, wherein...

[0043] The differential unit is used to acquire the fluctuation voltage corresponding to the pixel driving circuit, wherein the fluctuation voltage is calculated based on the terminal voltage of the light-emitting element included in the pixel driving circuit.

[0044] The display control unit is configured to calculate a voltage compensation value based on the fluctuating voltage, determine the initial voltage data value of the pixel driving circuit, and calculate the target control voltage of the pixel driving circuit based on the voltage compensation value and the initial voltage data value.

[0045] The pixel driving unit is used to drive the light-emitting element to perform display according to the target control voltage.

[0046] In one embodiment, the differential unit acquires the fluctuating voltage corresponding to the pixel driving circuit in the following manner:

[0047] Identify the light-emitting element in the pixel driving circuit and collect the terminal voltage corresponding to the light-emitting element;

[0048] The fluctuation voltage corresponding to the pixel driving circuit is calculated based on the terminal voltage.

[0049] In one embodiment, the display control unit includes a drive module;

[0050] The display control unit calculates the voltage compensation value in the following ways:

[0051] The driving module receives the fluctuating voltage and performs analog-to-digital conversion on the fluctuating voltage to obtain the target fluctuation difference.

[0052] Read the preset fluctuation difference value, and calculate the voltage compensation value based on the target fluctuation difference value and the preset fluctuation difference value, wherein the preset fluctuation difference value is stored in the driver memory corresponding to the driver module.

[0053] In one embodiment, the display control unit includes a screen module and a processing module;

[0054] The display control unit calculates the target control voltage of the pixel driving circuit in the following manner:

[0055] The voltage compensation value is sent to the screen module via the drive module;

[0056] The screen module receives the initial voltage data value sent by the processing module, calculates the target voltage data value based on the voltage compensation value and the initial voltage data value, and performs digital-to-analog conversion on the target voltage data value to obtain the target control voltage of the pixel driving circuit.

[0057] According to a fifth aspect of the present disclosure, an electronic device is provided, comprising: a processor; a memory for storing processor-executable instructions; wherein the processor is configured to: execute the display method described in any embodiment of the third aspect.

[0058] According to a sixth aspect of the present disclosure, a storage medium is provided that stores instructions which, when executed by a processor, enable the processor to perform the display method described in any embodiment of the third aspect.

[0059] The technical solutions provided by the embodiments of this disclosure can include the following beneficial effects: a pixel driving circuit, a differential circuit, and a display control circuit are configured in the display circuit. The first input terminal and the second input terminal of the differential circuit are respectively connected to the negative voltage terminal and the positive voltage terminal of the light-emitting diode, so that the differential circuit can accurately collect the fluctuating voltage in the pixel driving circuit. After sensing the fluctuating voltage of the pixel driving circuit, the differential circuit can transmit the fluctuating voltage to the feedback terminal of the display control circuit through the differential output terminal. Subsequently, the display compensation circuit transmits the compensated control voltage to the voltage receiving terminal of the pixel driving circuit through the control terminal, so that the pixel driving circuit controls the light-emitting diode to emit light according to the compensated control voltage, thereby avoiding screen ripple noise and solving the "water ripple" phenomenon.

[0060] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0061] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0062] Figure 1 A schematic diagram illustrating a screen display problem in a display circuit according to an embodiment of the present disclosure is shown;

[0063] Figure 2 A structural framework diagram of a display circuit according to an embodiment of the present disclosure is shown;

[0064] Figure 3 A circuit schematic diagram of a display circuit according to an embodiment of the present disclosure is shown;

[0065] Figure 4 A schematic diagram of the stage circuit logic of a display circuit according to an embodiment of the present disclosure is shown;

[0066] Figure 5 A flowchart of a display method provided according to an embodiment of the present disclosure is shown;

[0067] Figure 6 This diagram illustrates the structure of a display device according to an embodiment of the present disclosure;

[0068] Figure 7 This is a block diagram illustrating a display device according to an exemplary embodiment;

[0069] Figure 8 This is a block diagram illustrating a display device according to an exemplary embodiment;

[0070] Figure 9 This is a block diagram illustrating a display device according to an exemplary embodiment. Detailed Implementation

[0071] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure.

[0072] First, the terms and concepts used in one or more embodiments of this specification will be explained.

[0073] LCD: LCD (Liquid Crystal Display) is a type of flat panel display used for television and computer screens. Its advantages include low power consumption, small size, and low radiation.

[0074] OLED: OLED (Organic Light-Emitting Diode), also known as organic electroluminescent display, is a type of organic light-emitting device with low current. It refers to the phenomenon where organic semiconductor materials and light-emitting materials emit light through carrier injection and recombination under an electric field. OLED displays are thinner and lighter than LCDs, with higher brightness, lower power consumption, faster response, higher resolution, better flexibility, and higher luminous efficiency, meeting consumers' new demands for display technology.

[0075] PSM Mode: PSM (Power Saving Mode) is an independent state introduced in the 3GPP R12 standard. It is mainly used by UEs (User Equipment) that support PSM functionality to enter a low-power mode after being in an idle state for a period of time. In this mode, the UE's radio frequency (RF) section stops working, and the terminal's access layer also stops some related functions to reduce power consumption in RF, signaling processing, and other parts.

[0076] The first generation of mobile phone screens used liquid crystal display technology, also known as LCD. This type of screen achieves different display effects by changing the polarization state of light through the deflection of molecules in the liquid crystal under an electric field. Its main components are: backlight layer, vertical polarizer, glass, liquid crystal layer, positive and negative electrode circuits, color filter, and horizontal polarizer. However, because LCDs use a single layer of backlight as the light source, the display contrast is limited, and the deflection time of liquid crystal molecules is relatively slow, which may cause ghosting when displaying fast-moving images, affecting the user experience to some extent. To overcome the shortcomings of LCDs, the next generation of organic light-emitting diode (OLED) display technology was developed. Due to its self-emissive nature, it does not require a backlight panel, making it thinner and lighter than LCDs, and achieving higher contrast and response speed, thus becoming the mainstream mobile phone screen display technology today.

[0077] However, the lifespan of OLEDs limits their further development. Firstly, the electrodes in the device are prone to reacting with water and oxygen, creating non-luminous black spots in the light-emitting area. These black spots gradually increase in size over time, reducing the area of ​​the light-emitting region. Secondly, organic materials emitting different colors of light have varying lifespans; excessive consumption of a particular color can eventually lead to screen burn-in. Furthermore, the luminous intensity of an OLED is directly proportional to the injected current. To achieve stable display performance, the magnitude and stability of the voltage applied to the OLED are critical. Even slight changes in the luminous voltage can cause fluctuations in the luminous current. When the screen load is low and enters PSM mode, the screen driver chip intermittently sends pulse clusters composed of multiple high-frequency pulses to charge the inductor. When the interval frequency f... ripple At frequencies close to multiples of the screen refresh rate, the "water ripple" phenomenon observable to the human eye affects the display quality, such as... Figure 1 As shown, Figure 1 A schematic diagram illustrating a screen display problem in a display circuit according to an embodiment of this disclosure is shown, wherein the screen enters PSM mode when the screen brightness is below 2 nits. Therefore, in addition to hardware issues, it is particularly important to find a better way to solve the aforementioned "water ripple" phenomenon.

[0078] Based on this, this disclosure provides a display circuit for compensating for fluctuations in the light-emitting voltage, thereby solving the screen noise problem. This disclosure also relates to display methods, display devices, electronic devices, and storage media, which will be described in detail in the following embodiments.

[0079] See Figure 2 , Figure 2A structural framework diagram of a display circuit according to an embodiment of the present disclosure is shown, wherein the display circuit includes a pixel driving circuit, a differential circuit, and a display control circuit. The pixel driving circuit is an important component in display technology, responsible for controlling the brightness and color of individual pixels. Display screens such as mobile phone screens and computer screens contain a large number of pixels, each requiring an independent driving circuit to control its display characteristics. In the display circuit of the present disclosure, the pixel driving circuit also controls the brightness and color of the light-emitting diodes (LEDs) in its circuit, thereby completing pixel-driven display. To suppress fluctuating voltage and solve screen noise problems, the display circuit is also configured with a differential circuit. The first and second input terminals of the differential circuit are respectively connected to the negative voltage terminal and positive voltage terminal of the LED in the pixel driving circuit, such as... Figure 2 In the differential circuit, point C is the first input terminal and point D is the second input terminal. In the pixel driving circuit, point B is the negative voltage terminal of the LED and point A is the positive voltage terminal of the LED. By connecting points C and B, and point D and A, the differential circuit can acquire the terminal voltage of the LED in the pixel driving circuit, facilitating subsequent calculations of the fluctuating voltage in the pixel driving circuit. After the differential circuit detects the fluctuating voltage of the pixel driving circuit, it can transmit the fluctuating voltage to the display control circuit through the differential output terminal, such as... Figure 2 The differential output of the differential circuit is point E, and the feedback terminal of the display control circuit is point F. Connecting points E and F allows the differential circuit to transmit fluctuating voltage to the display control circuit via its differential output. This enables the display control circuit to calculate the corresponding voltage compensation value based on the received fluctuating voltage, and then compensate the control voltage according to the compensation value to determine a new target control voltage. After the display control circuit determines the new target control voltage, it can transmit the target control voltage to the pixel driving circuit via the control terminal, such as... Figure 2 The control terminal of the display control circuit is point G, and the voltage receiving terminal of the pixel driving circuit is point H. By connecting point G and point H, the pixel driving circuit can receive the target control voltage transmitted by the display control circuit. Based on the compensated target control voltage, the brightness and color of the light-emitting diode can be controlled, thus solving the phenomenon of "water ripple" noise on the screen.

[0080] See Figure 3 , Figure 3 A circuit schematic diagram of a display circuit according to an embodiment of the present disclosure is shown. Figure 3 The circuit schematic shown further illustrates the display circuit provided in this disclosure.

[0081] A display circuit 30 includes a pixel driving circuit 300, a differential circuit 320, and a display control circuit 340. The first input terminal of the differential circuit 320 is connected to the negative voltage terminal of the light-emitting diode 3002 of the pixel driving circuit, the second input terminal of the differential circuit is connected to the positive voltage terminal of the light-emitting diode 3002, and the differential output terminal of the differential circuit 320 is connected to the feedback terminal of the display control circuit 340. The control terminal of the display control circuit 340 is connected to the voltage receiving terminal of the pixel driving circuit 300.

[0082] In one possible implementation, the differential circuit 320 includes an operational amplifier 3202, a first resistor 3204, a second resistor 3206, a third resistor 3208, and a fourth resistor 3210. One end of the first resistor 3204 is connected to the inverting input of the operational amplifier 3202, and the other end of the first resistor 3204 serves as the first input. One end of the second resistor 3206 is connected to the non-inverting input of the operational amplifier 3202, and the other end of the second resistor 3206 serves as the second input. One end of the third resistor 3208 is connected to the inverting input, and the other end of the third resistor 3208 is connected to the op-amp output of the operational amplifier 3202. One end of the fourth resistor 3210 is connected to the non-inverting input, and the other end of the fourth resistor 3210 is grounded. The op-amp output serves as the differential output of the differential circuit.

[0083] In practical applications, a differential circuit is constructed using one operational amplifier and four resistors. The function of this differential circuit in the display circuit is to acquire the positive and negative voltages of the LEDs and calculate the fluctuating voltage based on these two voltages. Therefore, a subtraction function is required. Consequently, the resistance values ​​of the four resistors in the differential circuit are equal; that is, the first, second, third, and fourth resistors are all equal. At this point, the voltage at the operational amplifier output is the voltage value acquired at the second input terminal minus the voltage value acquired at the first input terminal. For the specific calculation method, please refer to Formula 1, as follows:

[0084] V out =V2-V1 (Formula 1)

[0085] Among them, V out V1 is the voltage value output by the operational amplifier, V2 is the voltage value collected at the second input terminal, and V1 is the voltage value collected at the first input terminal.

[0086] For specific implementation, please refer to Figure 3One end of the first resistor is connected to the inverting input of the operational amplifier, and the other end serves as the first input terminal, point A, which is connected to the cathode of the light-emitting diode (LED) in the pixel driving circuit to acquire the cathode voltage, ELVss, of the LED. One end of the second resistor is connected to the non-inverting input of the operational amplifier, and the other end serves as the second input terminal, point B, which is connected to the second reference voltage terminal in the pixel driving circuit to acquire the inverting reference voltage Vi2. Therefore, the operational amplifier can calculate the difference between Vi2 and ELVss, and this difference can be used as the fluctuating voltage across the LED.

[0087] In one possible implementation, the pixel driving circuit 300 includes a first transistor 3004, a second transistor 3006, a third transistor 3008, a fourth transistor 3010, a fifth transistor 3012, a sixth transistor 3014, a seventh transistor 3016, a capacitor 3018, and a light-emitting diode 3002.

[0088] The first transistor 3004 has its gate connected to the first node, its drain connected to the second node, and its source connected to the third node.

[0089] The second transistor 3006 has its gate connected to the first enable terminal, its drain connected to the second node, and its source serving as the voltage receiving terminal of the pixel driving circuit and connected to the control terminal of the display control circuit. The first enable terminal is used to output a write enable signal, and the control terminal is used to output a control voltage signal.

[0090] The third transistor 3008 has its gate connected to the first enable terminal, its drain connected to the first node, and its source connected to the third node.

[0091] The fourth transistor 3010 has its gate connected to the second enable terminal, its drain connected to the first node, and its source connected to the first reference voltage terminal. The second enable terminal is used to output a reset enable signal, and the first reference voltage terminal is used to output a positive reference voltage.

[0092] The fifth transistor 3012 has its gate connected to the third enable terminal, its drain connected to the first drive voltage terminal, and its source connected to the fourth node. The third enable terminal is used to output a light-emitting enable signal, and the first drive voltage terminal is used to output a positive drive voltage.

[0093] The sixth transistor 3014 has its gate connected to the third enable terminal, its drain connected to the third node, and its source connected to the fourth node.

[0094] The seventh transistor 3016 has its gate connected to the second enable terminal, its drain as a positive voltage terminal and connected to the second reference voltage terminal, and its source connected to the fourth node. The second reference voltage terminal is used to output a reverse reference voltage.

[0095] One end of capacitor 3018 is connected to the first node, and the other end is connected to the first reference voltage terminal;

[0096] The light-emitting diode 3002 has one end connected to the fourth node and the other end used as a negative voltage terminal and connected to the second driving voltage terminal, wherein the second driving voltage terminal is used to output the reverse driving voltage.

[0097] In practical applications, the pixel driving circuit in the display circuit provided in this disclosure adopts a "7T1C" structure, which consists of seven TFTs (Thin Film Transistors) and one capacitor C. "7T1C" is a pixel activation circuit configuration commonly used in OLED displays to achieve high-quality image display, ensuring the accuracy and stability of pixel brightness, thereby providing excellent display effects.

[0098] For details on the structural method, please refer to [link / reference]. Figure 3 The pixel driving circuit shown has the following configuration: the gate of the first transistor is connected to the first node K, the drain is connected to the second node L, and the source is connected to the third node M; the gate of the second transistor is connected to the first enable terminal Scan2, the drain is connected to the second node L, and the source is connected to the control terminal G of the display control circuit as a voltage receiving terminal; the gate of the third transistor is connected to the first enable terminal Scan2, the drain is connected to the first node K, and the source is connected to the third node M; the gate of the fourth transistor is connected to the second enable terminal Scan1, the drain is connected to the first node K, and the source is connected to the third node M. A reference voltage terminal VI1 is connected; the gate of the fifth transistor is connected to the third enable terminal EM, the drain is connected to the first drive voltage terminal ELVdd, and the source is connected to the fourth node N; the gate of the sixth transistor is connected to the third enable terminal EM, the drain is connected to the third node M, and the source is connected to the fourth node N; the gate of the seventh transistor is connected to the second enable terminal Scan1, the drain is connected as a positive voltage terminal to the second reference voltage terminal VI2, and the source is connected to the fourth node N; one end of the capacitor is connected to the first node K, and the other end is connected to the first drive voltage terminal ELVdd.

[0099] The above connection method constructs a "7T1C" circuit structure, thereby controlling the display of the LED. When the LED is connected to this circuit, one end is connected to the fourth node N, and the other end is connected as a negative voltage terminal to the second driving voltage terminal ELVss. It should be noted that in the pixel driving circuit, the first transistor is used as a driving transistor, and the other transistor is used as a switching transistor. The first transistor controls the overcurrent by controlling the voltage-controlled on / off state, thereby controlling the brightness of the LED. The first driving voltage terminal is used to output a positive voltage ELVdd, and the second driving voltage terminal is used to output a reverse voltage ELVss. Both ELVdd and ELVss are driving voltages used to drive the LED to emit light for display. The first enable terminal is used to output signal Scan2, the second enable terminal is used to output signal Scan1, and the third enable terminal is used to output signal EM, where Scan2 is the write enable signal, Scan1 is the reset enable signal, and EM is the light-emitting enable signal.

[0100] In one possible implementation, the pixel driving circuit is configured to turn on the fourth and seventh transistors based on a second enable signal during the reset phase; turn on the second, first, and third transistors based on a first enable signal during the data writing phase; and turn on the fifth, first, and sixth transistors based on a third enable signal during the light-emitting phase.

[0101] In practical applications, the pixel driving circuit operates in three states during the illumination process of one frame: reset, data writing, and illumination. The main function of the reset phase is to reset the control voltage of the first transistor and the anode voltage of the LED. The former turns off the first transistor and restores the charge in capacitor C to a preset value, while the latter keeps the voltages across the LED at Vi2 and ELVss respectively, allowing the LED to quickly turn on during the illumination phase. The data writing phase changes the gate voltage of the first transistor according to brightness and compensation requirements. At this time, the second and third transistors are turned on, and the control voltage is applied to the first transistor. During the illumination phase, the fifth and sixth transistors are turned on. Current flows from the first driving voltage terminal ELVdd through the first transistor and the LED to the second driving voltage terminal ELVss. Therefore, the magnitude of the illumination current is controlled by the gate voltage written by the first transistor, thus eliminating brightness deviation through the compensated control voltage and resolving the "water ripple" noise phenomenon on the screen.

[0102] In one feasible approach, during the reset phase, a positive reference voltage is provided to the capacitor via a fourth transistor, and a reverse reference voltage is provided to the light-emitting diode via a seventh transistor; during the data writing phase, a target control voltage is provided to the gate of the first transistor via a second transistor and a third transistor; and during the light-emitting phase, a second driving voltage and a target control voltage are provided to the light-emitting diode via a fifth transistor, a first transistor, and a sixth transistor.

[0103] See Figure 4 , Figure 4 A schematic diagram of the stage circuit logic of a display circuit according to an embodiment of the present disclosure is shown. In the reset stage, the pixel driving circuit turns on the fourth and seventh transistors according to the second enable signal Scan1, at which time the forward reference voltage Vi1 flows to the gate of the first transistor. In the data writing stage, the second, first, and third transistors are turned on based on the first enable signal Scan2, and the control voltage Vdata transmitted from the control terminal of the display control circuit is provided to the gate of the first transistor. In the light-emitting stage, the fifth, first, and sixth transistors are turned on based on the third enable signal EM, thereby causing the light-emitting current to flow from ELVdd to ELVss, prompting the light-emitting diode to start emitting light for display. It should be noted that in different stages, the signals are arranged according to... Figure 4 The signal waveform displayed changes; for example, during the reset phase, the Scan1 waveform appears at a low level.

[0104] Based on this, by controlling the transistors in the three different stages described above through the pixel driving circuit, it is ensured that the pixels can accurately emit light at the required grayscale level, maintaining stable brightness. Furthermore, with the cooperation of the differential circuit and display control circuit provided in this disclosure, compensation for the control voltage is completed, eliminating ripple noise.

[0105] In one possible implementation, the display control circuit 340 includes a screen module 3402, a driving module 3404, and a processing module 3406; the feedback input terminal of the driving module 3404 serves as the feedback terminal of the display control circuit 340 and is connected to the output terminal of the operational amplifier, and the feedback output terminal of the driving module 3404 is connected to the compensation input terminal of the screen module 3402; the control voltage terminal of the screen module 3402 serves as the control terminal of the display control circuit 340 and is connected to the source of the second transistor, and the control input terminal of the screen module 3402 is connected to the control transmission terminal of the processing module 3406.

[0106] In practical applications, after the differential circuit transmits the collected fluctuating voltage to the display control circuit, the display control circuit can calculate a specific compensation value based on the fluctuating voltage. It receives the fluctuating voltage and calculates the compensation value through the feedback input terminal D of the drive module, and outputs the compensation value to the compensation input terminal F of the screen module through the feedback output terminal E. The screen module receives the initial control voltage Vdata1 transmitted by the processing module through the control transmission terminal I, and calculates the compensated target control voltage Vdata2 based on the compensation value and the initial control voltage Vdata1. At this time, the target control voltage Vdata2 can be transmitted to the pixel drive circuit through the control voltage terminal G, so that the pixel drive circuit can display according to the compensated control voltage, thereby correcting the position of the first transistor used for light emission and improving the "water ripple" problem.

[0107] In summary, the display circuit provided in this disclosure includes a pixel driving circuit, a differential circuit, and a display control circuit. The first and second input terminals of the differential circuit are connected to the negative and positive voltage terminals of the light-emitting diode, respectively. This allows the differential circuit to accurately acquire the fluctuating voltage in the pixel driving circuit. After sensing the fluctuating voltage, the differential circuit can transmit the fluctuating voltage to the feedback terminal of the display control circuit through the differential output terminal. Subsequently, the display compensation circuit transmits the compensated control voltage to the voltage receiving terminal of the pixel driving circuit through the control terminal. This enables the pixel driving circuit to control the light-emitting diode to emit light according to the compensated control voltage, thereby avoiding screen ripple noise and solving the "water ripple" phenomenon.

[0108] See Figure 5 , Figure 5 A flowchart of a display method according to an embodiment of the present disclosure is shown. The method is applied to a display circuit, the circuit including a pixel driving circuit, a differential circuit, and a display control circuit. The method includes:

[0109] In step S502, the fluctuating voltage corresponding to the pixel driving circuit is acquired by a differential circuit, wherein the fluctuating voltage is calculated based on the terminal voltage of the light-emitting element included in the pixel driving circuit.

[0110] In practical applications, when users use electronic products such as mobile phones and computers in dimly lit environments, they tend to lower the phone's backlight brightness to browse web pages and videos at a suitable brightness, avoiding excessive screen light that could affect usability. At this time, the screen driver automatically enters PSM low-power mode. However, during this process, the driving voltage may fluctuate at a certain frequency due to mode changes, causing uneven pixel brightness and a water ripple effect on the screen. To address this issue, this disclosure provides a display method applied to a display circuit, which includes a differential circuit, a pixel driving circuit, and a display control circuit.

[0111] The differential circuit is used to collect the fluctuating voltage in the pixel driving circuit. The fluctuating voltage can be understood as the voltage fluctuation across the light-emitting diode (LED) caused by deviations in the driving voltage. Therefore, the fluctuating voltage is calculated by the differential circuit based on the collected voltage across the LED. After calculating the fluctuating voltage, the differential circuit transmits it to the display control circuit, which then performs voltage compensation.

[0112] In one feasible approach, the fluctuation voltage corresponding to the pixel driving circuit is acquired via a differential circuit, including: determining the light-emitting element in the pixel driving circuit via the differential circuit and acquiring the terminal voltage corresponding to the light-emitting element; and calculating the fluctuation voltage corresponding to the pixel driving circuit based on the terminal voltage.

[0113] In practice, the two input terminals of the differential circuit collect the voltage values ​​at both ends of the light-emitting element in the pixel driving circuit, and calculate the fluctuation voltage of the pixel driving circuit by using the voltage values ​​on both sides.

[0114] Based on this, the fluctuating voltage generated by the pixel driving circuit is acquired through a differential circuit, which facilitates subsequent voltage compensation processing based on the fluctuating voltage, eliminates screen ripple noise, and improves the user experience.

[0115] In step S504, the display control circuit calculates the voltage compensation value based on the fluctuating voltage, determines the initial voltage data value of the pixel driving circuit, and calculates the target control voltage of the pixel driving circuit based on the voltage compensation value and the initial voltage data value.

[0116] The voltage compensation value can be understood as the voltage value that the control voltage needs to be compensated for, calculated by the display control circuit based on the fluctuating voltage. Specifically, since the fluctuating voltage is Vi2-ELVss, after receiving this fluctuating voltage, it is compared with a preset standard deviation value, and the voltage compensation value is calculated based on the comparison. Then, the input initial voltage data value is calculated with the voltage compensation value to obtain the compensated target control voltage.

[0117] In one possible implementation, the display control circuit includes a drive module; the display control circuit calculates a voltage compensation value based on the fluctuating voltage, including: receiving the fluctuating voltage through the drive module and performing analog-to-digital conversion on the fluctuating voltage to obtain a target fluctuation difference; reading a preset fluctuation difference and calculating a voltage compensation value based on the target fluctuation difference and the preset fluctuation difference, wherein the preset fluctuation difference is stored in the drive memory corresponding to the drive module.

[0118] The driver module can be understood as the screen driver chip in the display control circuit. Since the fluctuation voltage collected and calculated by the differential circuit is an analog signal, the driver module can perform analog-to-digital conversion through the ADC (Analog-to-Digital Converter) port built into the FB (Frame Buffer) to convert the fluctuation voltage into a target fluctuation difference value, which is then processed for the target fluctuation difference value of the digital signal. After obtaining the target fluctuation difference value, a preset fluctuation difference value can be read. The preset fluctuation difference value can be understood as the standard deviation value stored in the driver memory in advance. By comparing the two differences, the difference between them can be calculated. This difference value is used as the voltage compensation value and transmitted to subsequent modules for processing. The voltage compensation value is the voltage difference value that the pixel driving circuit needs to compensate for in this frame.

[0119] Based on this, the analog-to-digital conversion processing of the drive module can convert the fluctuating voltage of the analog signal into the target fluctuation difference of the digital signal, which facilitates the subsequent calculation of the voltage compensation value based on the target fluctuation difference and the standard deviation.

[0120] In one possible implementation, the display control circuit includes a screen module and a processing module; a voltage compensation value is sent to the screen module via a driving module; the screen module receives the initial voltage data value sent by the processing module, calculates the target voltage data value based on the voltage compensation value and the initial voltage data value, and performs digital-to-analog conversion on the target voltage data value to obtain the target control voltage of the pixel driving circuit.

[0121] Specifically, the voltage compensation value sent by the driving module is superimposed on the initial voltage data value sent by the processing module by the screen module to obtain the final compensated target voltage data value. After performing digital-to-analog conversion on the target voltage data value, the final target control voltage used to transmit to the pixel driving circuit is obtained.

[0122] In practical applications, the screen module typically refers to the display panel itself. In the display method provided in this disclosure, the screen module may also include a signal processing unit. The processing module can be understood as the application control unit (AP) in the display control circuit. The processing module transmits the initial voltage data value of the current display frame from the pixel driving circuit to the screen module. The screen module calculates the target voltage data value by superimposing the received initial voltage data value and the calculated voltage compensation value. Then, the target voltage data value is subjected to analog-to-digital conversion to obtain the final target control voltage used to transmit to the pixel driving circuit.

[0123] Based on this, the display control circuit performs a series of processes on the fluctuating voltage to obtain the final target control voltage for transmission to the pixel driving circuit, so that the subsequent pixel driving circuit can display based on the compensated target control voltage, eliminating screen ripple noise and providing users with a better user experience.

[0124] In step S506, the pixel driving circuit drives the light-emitting element to display according to the target control voltage.

[0125] In practical applications, during the process of the pixel driving circuit executing the three stages of reset, write, and light emission according to its own circuit logic sequence, it receives the target control voltage transmitted by the display control circuit. Based on the target control voltage, it performs voltage writing, thereby correcting the light emission point of the driving transistor and improving the water ripple problem.

[0126] This disclosure provides a display method applied to a display circuit, the circuit including a pixel driving circuit, a differential circuit, and a display control circuit. The method includes: acquiring a fluctuating voltage corresponding to the pixel driving circuit through the differential circuit, wherein the fluctuating voltage is calculated based on the terminal voltage of the light-emitting element included in the pixel driving circuit; calculating a voltage compensation value based on the fluctuating voltage through the display control circuit to determine the initial voltage data value of the pixel driving circuit, and calculating a target control voltage of the pixel driving circuit based on the voltage compensation value and the initial voltage data value; and driving the light-emitting element to display through the pixel driving circuit according to the target control voltage. The display circuit includes a pixel driving circuit, a differential circuit, and a display control circuit. The first and second input terminals of the differential circuit are connected to the negative and positive voltage terminals of the light-emitting diode, respectively, so that the differential circuit can accurately acquire the fluctuating voltage in the pixel driving circuit. After sensing the fluctuating voltage of the pixel driving circuit, the differential circuit can transmit the fluctuating voltage to the feedback terminal of the display control circuit through the differential output terminal. Subsequently, the display compensation circuit transmits the compensated control voltage to the voltage receiving terminal of the pixel driving circuit through the control terminal, so that the pixel driving circuit controls the light-emitting diode to emit light according to the compensated control voltage, thereby avoiding screen ripple noise and solving the "water ripple" phenomenon.

[0127] See Figure 6 , Figure 6 This illustration shows a schematic diagram of a display device according to an embodiment of the present disclosure. The display device 600 can be understood as a common terminal device such as a mobile phone or computer. The display device carries a corresponding electronic display screen and has the display circuit 602 involved in the above embodiments. Since the display circuit 602 included in the display device is the same as the display circuit involved in the above embodiments, it will not be described in detail here. For relevant details, please refer to the description of the display circuit and display method embodiments.

[0128] Based on the same concept, embodiments of this disclosure also provide a display device.

[0129] It is understood that the display device provided in this disclosure includes hardware structures and / or software modules corresponding to each function in order to achieve the above-mentioned functions. In conjunction with the units and algorithm steps of the various examples disclosed in this disclosure, this disclosure can be implemented in hardware or a combination of hardware and computer software. Whether a function is executed by hardware or by computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the technical solutions of this disclosure.

[0130] Figure 7 This is a block diagram illustrating a display device 700 according to an exemplary embodiment. (Refer to...) Figure 7 The device includes a pixel driving unit 706, a differential unit 702, and a display control unit 704.

[0131] Differential unit 702 is used to acquire the fluctuation voltage corresponding to the pixel driving circuit, wherein the fluctuation voltage is calculated based on the terminal voltage of the light-emitting element included in the pixel driving circuit.

[0132] The display control unit 704 is used to calculate the voltage compensation value based on the fluctuating voltage, determine the initial voltage data value of the pixel driving circuit, and calculate the target control voltage of the pixel driving circuit based on the voltage compensation value and the initial voltage data value.

[0133] The pixel driving unit 706 is used to drive the light-emitting element for display according to the target control voltage.

[0134] In one embodiment, the differential unit 702 acquires the fluctuation voltage corresponding to the pixel driving circuit in the following manner: determining the light-emitting element in the pixel driving circuit and acquiring the terminal voltage corresponding to the light-emitting element; and calculating the fluctuation voltage corresponding to the pixel driving circuit based on the terminal voltage.

[0135] In one embodiment, the display control unit 704 includes a driving module; the display control unit calculates the voltage compensation value in the following manner: receiving fluctuating voltage through the driving module and performing analog-to-digital conversion on the fluctuating voltage to obtain a target fluctuation difference; reading a preset fluctuation difference and calculating the voltage compensation value based on the target fluctuation difference and the preset fluctuation difference, wherein the preset fluctuation difference is stored in the driving memory corresponding to the driving module.

[0136] In one embodiment, the display control unit 704 includes a screen module and a processing module; the display control unit calculates the target control voltage of the pixel driving circuit in the following manner: sending a voltage compensation value to the screen module through the driving module; receiving an initial voltage data value sent by the processing module through the screen module; calculating a target voltage data value based on the voltage compensation value and the initial voltage data value; and performing digital-to-analog conversion on the target voltage data value to obtain the target control voltage of the pixel driving circuit.

[0137] Regarding the apparatus in the above embodiments, the specific manner in which each module performs its operation has been described in detail in the embodiments related to the method, and will not be elaborated upon here.

[0138] Figure 8This is a block diagram illustrating a display device 800 according to an exemplary embodiment. Device 800 can be provided as a terminal. For example, device 800 can be a mobile phone, computer, digital broadcasting terminal, messaging device, game console, tablet device, medical device, fitness device, personal digital assistant, etc.

[0139] Reference Figure 8 The device 800 may include one or more of the following components: a processing component 802, a memory 804, a power component 806, a multimedia component 808, an audio component 810, an input / output (I / O) interface 812, a sensor component 814, and a communication component 816.

[0140] Processing component 802 typically controls the overall operation of device 800, such as operations associated with display, telephone calls, data communication, camera operation, and recording. Processing component 802 may include one or more processors 820 to execute instructions to perform all or part of the steps of the methods described above. Furthermore, processing component 802 may include one or more modules to facilitate interaction between processing component 802 and other components. For example, processing component 802 may include a multimedia module to facilitate interaction between multimedia component 808 and processing component 802.

[0141] Memory 804 is configured to store various types of data to support the operation of device 800. Examples of such data include instructions for any application or method operating on device 800, contact data, phonebook data, messages, pictures, videos, etc. Memory 804 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk.

[0142] The power supply component 806 provides power to the various components of the device 800. The power supply component 806 may include a power management system, one or more power sources, and other components associated with generating, managing, and distributing power to the device 800.

[0143] Multimedia component 808 includes a screen that provides an output interface between device 800 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touchscreen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensors may sense not only the boundaries of touch or swipe actions but also the duration and pressure associated with the touch or swipe operation. In some embodiments, multimedia component 808 includes a front-facing camera and / or a rear-facing camera. When device 800 is in an operating mode, such as a shooting mode or a video mode, the front-facing camera and / or rear-facing camera may receive external multimedia data. Each front-facing camera and rear-facing camera may be a fixed optical lens system or have focal length and optical zoom capabilities.

[0144] Audio component 810 is configured to output and / or input audio signals. For example, audio component 810 includes a microphone (MIC) configured to receive external audio signals when device 800 is in an operating mode, such as call mode, recording mode, and voice recognition mode. The received audio signals may be further stored in memory 804 or transmitted via communication component 816. In some embodiments, audio component 810 also includes a speaker for outputting audio signals.

[0145] I / O interface 812 provides an interface between processing component 802 and peripheral interface modules, such as keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to, home buttons, volume buttons, power buttons, and lock buttons.

[0146] Sensor assembly 814 includes one or more sensors for providing state assessments of various aspects of device 800. For example, sensor assembly 814 may detect the on / off state of device 800, the relative positioning of components such as the display and keypad of device 800, changes in the position of device 800 or a component of device 800, the presence or absence of user contact with device 800, the orientation or acceleration / deceleration of device 800, and temperature changes of device 800. Sensor assembly 814 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. Sensor assembly 814 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, sensor assembly 814 may also include an accelerometer, a gyroscope, a magnetometer, a pressure sensor, or a temperature sensor.

[0147] Communication component 816 is configured to facilitate wired or wireless communication between device 800 and other devices. Device 800 can access wireless networks based on communication standards, such as WiFi, 2G, or 3G, or combinations thereof. In one exemplary embodiment, communication component 816 receives broadcast signals or broadcast-related information from an external broadcast management system via a broadcast channel. In one exemplary embodiment, communication component 816 also includes a near-field communication (NFC) module to facilitate short-range communication. For example, the NFC module may be implemented based on radio frequency identification (RFID) technology, Infrared Data Association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

[0148] In an exemplary embodiment, the apparatus 800 may be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field-programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components to perform the methods described above.

[0149] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory 804 including instructions, which can be executed by a processor 820 of the device 800 to perform the above-described method. For example, the non-transitory computer-readable storage medium may be a ROM, random access memory (RAM), CD-ROM, magnetic tape, floppy disk, and optical data storage device, etc.

[0150] Figure 9 This is a block diagram illustrating a display device 900 according to an exemplary embodiment. For example, device 900 may be provided as a server. (Refer to...) Figure 9 The apparatus 900 includes a processing component 922, which further includes one or more processors, and memory resources represented by memory 932 for storing instructions, such as application programs, that can be executed by the processing component 922. The application programs stored in memory 932 may include one or more modules, each corresponding to a set of instructions. Furthermore, the processing component 922 is configured to execute instructions to perform the methods described above…

[0151] The device 900 may also include a power supply component 926 configured to perform power management of the device 900, a wired or wireless network interface 950 configured to connect the device 900 to a network, and an input / output (I / O) interface 958. The device 900 can operate on an operating system stored in memory 932, such as Windows Server™, MacOSX™, Unix™, Linux™, FreeBSD™, or similar.

[0152] It is understood that in this disclosure, "multiple" refers to two or more, and other quantifiers are similar. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. The singular forms "a," "the," and "the" are also intended to include the plural forms unless the context clearly indicates otherwise.

[0153] It is further understood that the terms "first," "second," etc., are used to describe various types of information, but this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another, and do not indicate a specific order or degree of importance. In fact, the expressions "first," "second," etc., are completely interchangeable. For example, without departing from the scope of this disclosure, first information can also be referred to as second information, and similarly, second information can also be referred to as first information.

[0154] It is further understood that the terms “center,” “longitudinal,” “lateral,” “front,” “rear,” “up,” “down,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this embodiment and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation.

[0155] It can be further understood that, unless otherwise specified, "connection" includes both direct connections where no other components exist between the two parties and indirect connections where other components exist between them.

[0156] It is further understood that although operations are described in a specific order in the accompanying drawings in the embodiments of this disclosure, this should not be construed as requiring these operations to be performed in the specific order or serial order shown, or requiring all of the shown operations to be performed to obtain the desired result. In certain environments, multitasking and parallel processing may be advantageous.

[0157] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein.

[0158] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. A display circuit, characterized in that, The circuit includes a pixel driving circuit, a differential circuit, and a display control circuit, wherein... The first input terminal of the differential circuit is connected to the negative voltage terminal of the light-emitting diode of the pixel driving circuit, the second input terminal of the differential circuit is connected to the positive voltage terminal of the light-emitting diode, and the differential output terminal of the differential circuit is connected to the feedback terminal of the display control circuit. The control terminal of the display control circuit is connected to the voltage receiving terminal of the pixel driving circuit.

2. The circuit according to claim 1, characterized in that, The differential circuit includes an operational amplifier, a first resistor, a second resistor, a third resistor, and a fourth resistor; One end of the first resistor is connected to the inverting input terminal of the operational amplifier, and the other end of the first resistor serves as the first input terminal; One end of the second resistor is connected to the non-inverting input terminal of the operational amplifier, and the other end of the second resistor serves as the second input terminal; One end of the third resistor is connected to the inverting input terminal, and the other end of the third resistor is connected to the operational amplifier output terminal. One end of the fourth resistor is connected to the positive input terminal, and the other end of the fourth resistor is grounded; The operational amplifier output terminal serves as the differential output terminal of the differential circuit.

3. The circuit according to claim 2, characterized in that, The pixel driving circuit includes a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, a sixth transistor, a seventh transistor, a capacitor, and the light-emitting diode; The first transistor has its gate connected to the first node, its drain connected to the second node, and its source connected to the third node; The second transistor has its gate connected to the first enable terminal, its drain connected to the second node, and its source serving as the voltage receiving terminal of the pixel driving circuit and connected to the control terminal of the display control circuit. The first enable terminal is used to output a write enable signal, and the control terminal is used to output a control voltage signal. The third transistor has its gate connected to the first enable terminal, its drain connected to the first node, and its source connected to the third node; The fourth transistor has its gate connected to the second enable terminal, its drain connected to the first node, and its source connected to the first reference voltage terminal. The second enable terminal is used to output a reset enable signal, and the first reference voltage terminal is used to output a positive reference voltage. The fifth transistor has its gate connected to the third enable terminal, its drain connected to the first driving voltage terminal, and its source connected to the fourth node. The third enable terminal is used to output a light-emitting enable signal, and the first driving voltage terminal is used to output a positive driving voltage. The sixth transistor has its gate connected to the third enable terminal, its drain connected to the third node, and its source connected to the fourth node; The seventh transistor has its gate connected to the second enable terminal, its drain serving as the positive voltage terminal and connected to the second reference voltage terminal, and its source connected to the fourth node. The second reference voltage terminal is used to output a reverse reference voltage. One end of the capacitor is connected to the first node, and the other end is connected to the first reference voltage terminal; One end of the light-emitting diode is connected to the fourth node, and the other end serves as the negative voltage terminal and is connected to the second driving voltage terminal, wherein the second driving voltage terminal is used to output the reverse driving voltage.

4. The circuit according to claim 3, characterized in that, The display control circuit includes a screen module, a driver module, and a processing module; The feedback input terminal of the driving module serves as the feedback terminal of the display control circuit and is connected to the output terminal of the operational amplifier. The feedback output terminal of the driving module is connected to the compensation input terminal of the screen module. The control voltage terminal of the screen module serves as the control terminal of the display control circuit and is connected to the source of the second transistor. The control input terminal of the screen module is connected to the control transmission terminal of the processing module.

5. A display device, characterized in that, Includes the display circuit as described in any one of claims 1-4.

6. A display method, characterized in that, Applied to a display circuit, the circuit including a pixel driving circuit, a differential circuit, and a display control circuit, the method includes: The differential circuit acquires the fluctuation voltage corresponding to the pixel driving circuit, wherein the fluctuation voltage is calculated based on the terminal voltage of the light-emitting element included in the pixel driving circuit. The display control circuit calculates a voltage compensation value based on the fluctuating voltage, determines the initial voltage data value of the pixel driving circuit, and calculates the target control voltage of the pixel driving circuit based on the voltage compensation value and the initial voltage data value. The pixel driving circuit drives the light-emitting element to perform the display according to the target control voltage.

7. The method according to claim 6, characterized in that, The differential circuit acquires the fluctuating voltage corresponding to the pixel driving circuit, including: The differential circuit is used to determine the light-emitting element in the pixel driving circuit and to collect the terminal voltage corresponding to the light-emitting element. The fluctuation voltage corresponding to the pixel driving circuit is calculated based on the terminal voltage.

8. The method according to claim 6, characterized in that, The display control circuit includes a drive module; The display control circuit calculates the voltage compensation value based on the fluctuating voltage, including: The driving module receives the fluctuating voltage and performs analog-to-digital conversion on the fluctuating voltage to obtain the target fluctuation difference. Read the preset fluctuation difference value, and calculate the voltage compensation value based on the target fluctuation difference value and the preset fluctuation difference value, wherein the preset fluctuation difference value is stored in the driver memory corresponding to the driver module.

9. The method according to claim 8, characterized in that, The display control circuit includes a screen module and a processing module; The display control circuit calculates the target control voltage of the pixel driving circuit based on the voltage compensation value and the initial voltage data value, including: The voltage compensation value is sent to the screen module via the drive module; The screen module receives the initial voltage data value sent by the processing module, calculates the target voltage data value based on the voltage compensation value and the initial voltage data value, and performs digital-to-analog conversion on the target voltage data value to obtain the target control voltage of the pixel driving circuit.

10. A display device, characterized in that, The device comprises a pixel driving unit, a differential unit, and a display control unit, wherein... The differential unit is used to acquire the fluctuation voltage corresponding to the pixel driving circuit, wherein the fluctuation voltage is calculated based on the terminal voltage of the light-emitting element included in the pixel driving circuit. The display control unit is configured to calculate a voltage compensation value based on the fluctuating voltage, determine the initial voltage data value of the pixel driving circuit, and calculate the target control voltage of the pixel driving circuit based on the voltage compensation value and the initial voltage data value. The pixel driving unit is used to drive the light-emitting element to perform display according to the target control voltage.

11. The apparatus according to claim 10, characterized in that, The differential unit acquires the fluctuating voltage corresponding to the pixel driving circuit in the following manner: Identify the light-emitting element in the pixel driving circuit and collect the terminal voltage corresponding to the light-emitting element; The fluctuation voltage corresponding to the pixel driving circuit is calculated based on the terminal voltage.

12. The apparatus according to claim 10, characterized in that, The display control unit includes a drive module; The display control unit calculates the voltage compensation value in the following ways: The driving module receives the fluctuating voltage and performs analog-to-digital conversion on the fluctuating voltage to obtain the target fluctuation difference. Read the preset fluctuation difference value, and calculate the voltage compensation value based on the target fluctuation difference value and the preset fluctuation difference value, wherein the preset fluctuation difference value is stored in the driver memory corresponding to the driver module.

13. The apparatus according to claim 12, characterized in that, The display control unit includes a screen module and a processing module; The display control unit calculates the target control voltage of the pixel driving circuit in the following manner: The voltage compensation value is sent to the screen module via the drive module; The screen module receives the initial voltage data value sent by the processing module, calculates the target voltage data value based on the voltage compensation value and the initial voltage data value, and performs digital-to-analog conversion on the target voltage data value to obtain the target control voltage of the pixel driving circuit.

14. An electronic device, characterized in that, include: processor: Memory used to store processor-executable instructions; The processor is configured to perform the method according to any one of claims 6 to 9.

15. A storage medium, characterized in that, The storage medium stores instructions that, when executed by a processor, enable the processor to perform the method according to any one of claims 6 to 9.

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