Display panel control method and display panel

Abstract

The invention provides a display panel control method and a display panel, and the method comprises the steps: obtaining a maximum value and a minimum value of all data signals, and obtaining a maximum data signal and a minimum data signal; determining a difference value between the maximum data signal and the minimum data signal as a target difference value; a high-level voltage value of a target control signal is determined according to the maximum data signal, a low-level voltage value of the target control signal is determined according to the target difference value, and the target control signal is a control signal output by a multiplexer in the display panel and is used for controlling a selection transistor to be switched on or switched off, and under the condition that the selection transistor is conducted, the data signal is transmitted to the corresponding pixel driving circuit, and the display panel displays a corresponding picture. According to the method, the control signal output by the multiplexer is adjusted in real time according to the data signal in the display panel, so that the control signal output by the multiplexer is not a fixed voltage value, and the power consumption of the display panel is reduced.

Description

Technical Field

[0001] This application relates to the field of display control, and more particularly, to a control method and a display panel for a display panel. Background Art

[0002] Organic Light Emitting Diodes (OLED) display panels are widely used in products such as mobile phones, TVs, laptops, tablets, wearable devices, etc. due to their advantages of being ultra-thin, having high contrast, low power consumption, fast response speed, wide viewing angle, etc.

[0003] Existing OLED display panels typically adopt a multiplexed driving architecture. In the multiplexed driving architecture, a multiplexer (Mux) is used to selectively transfer data signals from data lines to multiple pixels at different time points. The driving of the Mux usually involves using fixed Mux_H (high voltage) and Mux_L (low voltage) to control the on and off of transistors. These voltages are part of the system design to ensure that the transistors can be reliably turned on (conducted) or off (switched off) when needed.

[0004] However, when the Mux_H or Mux_L voltage is increased, that is, the control voltage of the transistor increases, this will directly lead to an increase in power consumption. The reason is that a higher control voltage means that there will be a larger current transient when the transistor switches states (from off to on or from on to off). According to the formula P = IV (power = current × voltage), when both voltage and current increase, the instantaneous power consumption will also increase significantly. This additional instantaneous power consumption occurs in each pixel update cycle, and when accumulated, it will significantly increase the power consumption of the entire display panel.

[0005] At the same time, higher voltages and current transients will also increase electromagnetic interference (EMI). EMI is interference caused by electromagnetic fields generated by rapidly changing currents, and it may affect the normal operation of other electronic devices. In the OLED display driving circuit, EMI may originate from high-frequency currents generated when transistors switch, and these current changes generate electromagnetic radiation on the circuit board. The increased current transient caused by the increased voltage exacerbates this phenomenon, thus increasing EMI.

[0006] Therefore, in the existing OLED display driving circuit, the fixed voltage settings of the high and low levels of the multiplexer will result in problems of relatively high power consumption and large electromagnetic interference of the display panel. Summary of the Invention

[0007] The main objective of the present application is to provide a control method and a display panel for a display panel, so as to at least solve the problem that in the existing OLED display driving circuit, the fixed voltage settings of the high level and the low level of the multiplexer will result in relatively high power consumption and relatively large electromagnetic interference of the display panel.

[0008] To achieve the above objective, according to one aspect of the present application, a control method for a display panel is provided, including: obtaining the maximum value and the minimum value of all data signals to obtain the maximum data signal and the minimum data signal; determining the difference between the maximum data signal and the minimum data signal as the target difference; determining the high-level voltage value of the target control signal according to the maximum data signal, and determining the low-level voltage value of the target control signal according to the target difference, where the target control signal is the control signal output by the multiplexer in the display panel, and the target control signal is used to control the selection transistor to conduct or turn off. Wherein, when the selection transistor conducts, the data signal is transmitted to the corresponding pixel driving circuit, and the display panel displays the corresponding picture.

[0009] According to another aspect of the present application, a display panel is provided, including a multiplexer, a plurality of pixels, a plurality of pixel driving circuits, and a plurality of selection transistors, where the pixels and the pixel driving circuits are in one-to-one correspondence, and one row of the pixels corresponds to one of the selection transistors. Wherein, the high-level voltage value of the target control signal output by the multiplexer is determined according to the maximum data signal, the target control signal is used to control the selection transistor to conduct or turn off, the low-level voltage value of the target control signal is determined according to the target difference, the maximum data signal is the maximum value of all data signals, and the target difference is the difference between the maximum data signal and the minimum data signal, and the difference of the minimum data signal is the minimum value of all data signals.

[0010] Applying the technical solution of the present application, for the control method of the above display panel, first, the maximum value and the minimum value of all data signals are obtained to get the maximum data signal and the minimum data signal; then, the difference between the maximum data signal and the minimum data signal is determined as the target difference; finally, the high-level voltage value of the target control signal is determined according to the maximum data signal, and the low-level voltage value of the target control signal is determined according to the target difference. The target control signal is the control signal output by the multiplexer in the display panel, and the target control signal is used to control the selection transistor to conduct or turn off. Among them, when the selection transistor conducts, the data signal is transmitted to the corresponding pixel driving circuit, and the display panel displays the corresponding picture. This method adjusts the control signal output by the multiplexer in real time according to the data signal in the display panel, so that the control signal output by the multiplexer is not a fixed voltage value, thereby reducing the power consumption of the display panel, and solving the problem that in the existing OLED display driving circuit, the fixed voltage settings of the high level and the low level of the multiplexer will result in a relatively high power consumption and a relatively large electromagnetic interference of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The accompanying drawings forming a part of this application are used to provide a further understanding of this application. The schematic embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation to this application. In the drawings:

[0012] Figure 1 shows a schematic structural diagram of a multiplex driving architecture of a display panel provided according to an embodiment of the prior art;

[0013] Figure 2 shows a schematic flow diagram of a control method of a display panel provided according to an embodiment of this application;

[0014] Figure 3 shows a schematic structural diagram of a pixel driving circuit of a display panel provided according to an embodiment of this application;

[0015] Figure 4 shows a schematic diagram of a Mux signal provided according to the prior art;

[0016] Figure 5 shows a schematic diagram of a target control signal provided according to an embodiment of this application;

[0017] Figure 6 shows a schematic diagram of a data signal provided according to an embodiment of this application;

[0018] Figure 7 shows a schematic diagram of a signal during the process of the level of the target control signal rising;

[0019] Figure 8 FIG. 1 shows a schematic flow chart of another method for controlling a display panel according to an embodiment of the present application;

[0020] Figure 9 FIG. 2 shows a schematic structural diagram of a display panel according to an embodiment of the present application.

[0021] Wherein, the above-mentioned drawings include the following reference numerals:

[0022] M00, driving transistor; M01, first reset transistor; M02, second reset transistor; M03, threshold compensation transistor; M04, data writing transistor; M05, first light-emitting control transistor; M06, second light-emitting control transistor; C0, capacitor; 100, display panel. Detailed Embodiments

[0023] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0024] In order to enable those skilled in the art to better understand the solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0025] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so as to describe the embodiments of the present application herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0026] As introduced in the background art, existing OLED display panels usually adopt a multiplexed driving architecture. In the multiplexed driving architecture, a multiplexer (abbreviated as Mux) is used to selectively transfer data signals from data lines to multiple pixels at different time points. Figure 1It is a schematic structural diagram of a multiplex driving architecture of a display panel in the prior art, as Figure 1 shown, Figure 1 where R is a red pixel unit, G is a green pixel unit, B is a blue pixel unit, the Mux_H and Mux_L voltages are the high and low levels of the signals input to CKH1 and CKH2 respectively. When the Mux_H or Mux_L voltage is increased, a higher control voltage means that there will be a larger current transient when the transistor switching state changes (from off to on or from on to off). In the case where both the voltage and current increase, the instantaneous power consumption will also increase significantly. This additional instantaneous power consumption occurs in each pixel update cycle and, when accumulated, will significantly increase the power consumption of the entire display panel.

[0027] To solve the problem that the fixed voltage settings of the high and low levels of the multiplexer in the existing OLED display driving circuit will result in a relatively high power consumption and large electromagnetic interference of the display panel, embodiments of the present application provide a control method for a display panel and a display panel.

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention.

[0029] In this embodiment, a control method for a display panel is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and although the logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in a different order than here.

[0030] Figure 2 It is a flowchart of a control method for a display panel according to an embodiment of the present application. As Figure 2 shown, the method includes the following steps:

[0031] Step S101, obtain the maximum and minimum values of all data signals to obtain the maximum data signal and the minimum data signal;

[0032] Among them, the data signal is the data signal Data input to the pixel driving circuit of each pixel unit for writing real emission data, and the pixel driving circuit is used to drive the corresponding pixel unit to emit light. As Figure 1 shown, R, G, and B are different pixel units respectively, and the data signal is the Data signal input to the pixel driving circuits of R, G, and B. Among them, the data signal is related to Figure 1 the scan signal in, and the scan signal is Figure 1 S1, S2,... S1080 in.

[0033] Figure 3Schematic diagram of the pixel driving circuit of the display panel, as Figure 3 shown, the pixel driving circuit includes a first reset transistor M01, a second reset transistor M02, a threshold compensation transistor M03, a data writing transistor M04, a first light emission control transistor M05, a second light emission control transistor M06, a driving transistor M00 and a capacitor C0. Among them, the first reset transistor M01 is used to conduct under the control of the second scan signal Scan1 and transmit the reset signal Vref to the second node N2. The second reset transistor M02 is used to conduct under the control of the second scan signal Scan1 and transmit the reset signal Vref to the anode of the light emitting element. The threshold compensation transistor M03 and the data writing transistor M04 are used to write the data signal Vdata to the second node N2 under the control of the first scan signal Scan2. The first light emission control transistor M05 and the second light emission control transistor M06 are used to conduct under the control of the data writing control signal Emit to transmit the signal of the first driving power supply line PVDD to the anode of the light emitting element to control the light emission of the light emitting element. The driving transistor M00 is used to conduct under the control of the voltage of the second node N2 to drive the light emitting element to emit light. The data signal mentioned in this embodiment is Figure 3 the data signal Vdata in

[0034] Step S102: Determine the target difference as the difference between the above maximum data signal and the above minimum data signal;

[0035] Among them, the target difference is the difference between the maximum data signal and the minimum data signal in the display panel. Since the data signal will affect Mux_H and Mux_L, when the data signal changes, Mux_H and Mux_L will also change correspondingly. Therefore, by calculating the difference between the maximum data signal and the minimum data signal, it can be used to adjust the rising edge and falling edge of the Mux signal (i.e., Mux_H and Mux_L) subsequently.

[0036] Step S103: Determine the high-level voltage value of the target control signal according to the above maximum data signal, and determine the low-level voltage value of the target control signal according to the above target difference. The target control signal is the control signal output by the multiplexer in the display panel, and the target control signal is used to control the conduction or cut-off of the selection transistor. Among them, when the selection transistor is conducting, the data signal is transmitted to the corresponding pixel driving circuit, and the display panel displays the corresponding picture.

[0037] Specifically, the target control signal is the Mux signal, that is, input to Figure 1The signals of CKH1 and CKH2. The high-level voltage value of the target control signal is Mux_H, and the low-level voltage value of the target control signal is Mux_L. The generally calculated range of Mux_H is 2 to 8V, and the range of Mux_L is generally 0 to -10V.

[0038] In OLED display technology, voltage change (△V) and current change (△I) are closely related, especially during the transmission of data signals. The rising and falling edges of the Mux signal refer to the time points when the Mux_H or Mux_L signal jumps from one level to another. The rapid change of the signal at these points generates instantaneous current surges, which not only lead to an increase in power consumption but may also generate electromagnetic radiation (i.e., EMI), affecting the display quality and the normal operation of neighboring electronic devices.

[0039] When the △V of the Mux_H and Mux_L voltages of the Max signal increases, it means that when the displayed content changes, the voltage change range of the data signal becomes larger. This leads to increased power consumption, increased EMI, and an increased likelihood of signal attenuation or reflection. Therefore, it is necessary to dynamically adjust the EQ value (equivalent value) of the Mux signal. Specifically, increase the intensity of pre-emphasis or de-emphasis at the rising and falling edges of the Mux signal to ensure that even under large △V conditions, the signal can still be reliably transmitted to each pixel, and the power consumption and EMI are maintained at an acceptable level.

[0040] Traditional OLED driving circuits may use fixed Mux_H and Mux_L voltages, which can lead to increased power consumption, increased EMI, and an increased likelihood of signal attenuation or reflection. By dynamically adjusting the Mux_H and Mux_L voltages, signal attenuation and distortion can be reduced, especially when the data signal changes greatly or the signal line is long. This ensures that the data signal can be accurately received in the pixel driving circuit, improving the display quality. Dynamically adjusting the voltage to ensure that sufficient driving force is provided only when necessary can significantly reduce power consumption. Higher voltage or current transients generate stronger electromagnetic fields, which may interfere with other circuit components. By adjusting the voltages of Mux_H and Mux_L to reduce unnecessary current changes, EMI can be effectively reduced, improving the overall stability of the system.

[0041] The control method of the display panel of the present application first obtains the maximum value and the minimum value of all data signals to obtain the maximum data signal and the minimum data signal; then determines the difference between the maximum data signal and the minimum data signal as the target difference; finally determines the high-level voltage value of the target control signal according to the maximum data signal, and determines the low-level voltage value of the target control signal according to the target difference. The target control signal is the control signal output by the multiplexer in the display panel, and the target control signal is used to control the selection transistor to conduct or turn off. Wherein, when the selection transistor conducts, the data signal is transmitted to the corresponding pixel driving circuit, and the display panel displays the corresponding picture. This method adjusts the control signal output by the multiplexer in real time according to the data signal in the display panel, so that the control signal output by the multiplexer is not a fixed voltage value, thereby reducing the power consumption of the display panel, and solving the problem that in the existing OLED display driving circuit, the fixed voltage settings of the high level and the low level of the multiplexer will cause the display panel to have higher power consumption and greater electromagnetic interference.

[0042] In some embodiments, determining the difference between the maximum data signal and the minimum data signal as the target difference includes the following steps:

[0043] Step S1021, when the display panel is driven by a single data line, determine the difference between the data signal corresponding to the (n + 1)-th row in the display panel and the data signal corresponding to the n-th row in the display panel as the target difference;

[0044] Among them, single data line driving (SDL for short) is a driving architecture for liquid crystal displays (LCDs) or OLED (organic light emitting diode) displays. In the SDL architecture, each pixel column (or data line, signal line) is only connected to a single data driving circuit, and all pixel columns receive data signals from the driving chip independently in this way. In the display panel with a single data line driving (SDL) architecture, the data signal is transmitted row by row in sequence, which means that after the data signal of the current row (the n-th row) is transmitted, the data signal of the next row (the (n + 1)-th row) will be transmitted immediately. In this case, the change from the n-th row to the (n + 1)-th row represents the most direct inter-frame or inter-line change of the display content.

[0045] Step S1022, when the display panel is driven by a double data line, determine the difference between the data signal corresponding to the (n + 2)-th row in the display panel and the data signal corresponding to the n-th row in the display panel as the target difference.

[0046] Among them, Dual Data Line Driving (DDL for short) is a commonly used driving architecture in modern high-resolution displays, especially for LCD and OLED panels. The basic concept of DDL is to increase the data transmission efficiency, reduce power consumption, decrease signal delay and crosstalk compared with the traditional Single Data Line Driving (SDL), thereby improving the display quality and performance. In the Dual Data Line Driving (DDL) architecture, each row of pixels on the display panel is actually driven by two data lines together. This driving method aims to improve data transmission efficiency and reduce signal interference, especially in high-resolution and high-frame-rate display scenarios. In DDL, the data signal is not transmitted continuously row by row, but in parallel through two data lines. This means that the data signal change in the nth row may be partially cancelled in the (n + 1)th row because the data line driving the (n + 1)th row (assumed to be the reverse data line) will transmit a signal change opposite to that of the nth row to reduce the overall signal fluctuation. However, from the nth row to the (n + 2)th row, the data signal change is closer to the case of simple row-by-row comparison in the SDL architecture because the data signal change in the (n + 2)th row is no longer affected by the signal change in the (n + 1)th row. In this way, the difference between the data signals in the nth row and the (n + 2)th row can better reflect the amplitude of the data change between rows, that is, the difference between the maximum data signal and the minimum data signal.

[0047] Whether in the SDL or DDL architecture, by calculating the target difference and adjusting the voltage of the Mux control signal accordingly, the integrity of the signal on the data line can be significantly improved. This is because dynamically adjusting the voltage can compensate for the attenuation and distortion that the signal may encounter during transmission, especially in high-contrast or high-speed data transmission scenarios.

[0048] In the SDL architecture, since the data signal is transmitted continuously, optimizing the difference between adjacent row data signals can directly reduce the energy waste during each data switch. In the DDL architecture, although the data transmission is intermittent, through precise control of the difference between interlaced data signals, efficient energy management during data transmission can also be achieved, avoiding excessive power consumption and EMI caused by sudden changes in data signals.

[0049] By dynamically adjusting the Mux control signal, especially considering the influence of the target difference, it can be ensured that when displaying different image contents, the pixel driving circuit can respond quickly and accurately to the changes in the data signal, thereby improving the display quality and response speed. This is particularly important in scenarios where dynamic content is processed or high refresh rates are required. The choice between the SDL and DDL architectures depends on the specific display panel design and application requirements. By defining different methods for calculating the target difference, the system can better adapt to various display modes, providing flexible signal processing and power consumption control strategies to meet different display effects and energy efficiency standards.

[0050] In summary, whether it is the SDL or DDL architecture, the method of determining the target difference and adjusting the Mux control signal accordingly is to ensure the efficient and lossless transmission of the signal, while minimizing power consumption and reducing EMI as much as possible, in order to improve the display quality and system performance of the OLED display panel. This refined driving signal management strategy reflects the continuous pursuit of signal optimization and energy efficiency improvement in the research and development of modern display technologies.

[0051] In some embodiments, determining the high-level voltage value of the target control signal according to the above maximum data signal and determining the low-level voltage value of the target control signal according to the above target difference includes the following steps:

[0052] Step S201, obtaining the current display brightness of the display panel and the duty cycle of the target control signal;

[0053] Among them, in the OLED display panel, the brightness is determined by the current passing through the OLED unit. Higher current means higher brightness, but also greater energy consumption. Therefore, it is necessary to ensure that the voltage of the target control signal can effectively drive the OLED unit at different brightness settings without causing unnecessary energy consumption. The duty cycle determines the high-level duration of the Mux control signal, that is, the time when the transistor is turned on. In scenarios of high-speed data transmission or high refresh rates, the transistor needs to be turned on and off faster, which means the duty cycle may be smaller. At this time, the high voltage of the target control signal may need to be higher to ensure that the transistor is turned on quickly and fully.

[0054] Step S202, determining the high-level voltage value of the target control signal based on at least the current display brightness of the display panel, the duty cycle of the target control signal, and the above maximum data signal;

[0055] Step S203, determining the low-level voltage value of the target control signal based on at least the current display brightness of the display panel, the duty cycle of the target control signal, and the above target difference.

[0056] Specifically, by comprehensively analyzing the display brightness, signal duty cycle, and the variation amplitude of the data signal, the high and low level voltages of the Mux can be precisely adjusted, avoiding the voltage surplus problem that often occurs in traditional driving methods, thereby significantly reducing the energy consumption of the driving circuit. The optimized voltage control reduces unnecessary current fluctuations, significantly reduces electromagnetic radiation, enables the display to operate more stably in a dense circuit environment, and reduces interference to peripheral electronic devices.

[0057] In some embodiments, determining the high-level voltage value of the target control signal based on at least the current display brightness of the display panel, the duty cycle of the target control signal, and the maximum data signal includes the following steps:

[0058] Step S301, determining first compensation data according to the current display brightness of the display panel and the duty cycle of the target control signal;

[0059] Among them, the calculation of the first compensation data is based on the current display brightness of the display panel and the duty cycle of the target control signal (Mux signal). This is because the display brightness affects the current demand of the OLED unit, and the current demand is directly related to the voltage. At the same time, the duty cycle affects the switching state and efficiency of the transistor, indirectly determining the optimal voltage range. By analyzing these two variables, a basic voltage adjustment guidance, that is, the first compensation data, can be obtained to preliminarily correct the high-level voltage value of the Mux signal.

[0060] Step S302, obtaining second compensation data, where the second compensation data is related to the high-level voltage value and the low-level voltage value of the previous pulse of the target control signal;

[0061] Among them, the second compensation data focuses on the influence of the high-level voltage value of the previous pulse of the target control signal on the current Mux signal voltage. This influence may come from residual effects of the circuit, such as self-heating effect, charge accumulation, etc., which will cause dynamic changes in the voltage threshold. Obtaining the second compensation data is to eliminate the residue of this historical voltage influence and ensure that each signal update is an accurate control based on the latest state.

[0062] Step S303, determining the high-level voltage value of the target control signal based on at least the first compensation data, the second compensation data, and the maximum data signal.

[0063] Specifically, by integrating the information of the first compensation data, the second compensation data, and the maximum data signal, the high-level voltage value of the Mux signal can be determined more accurately. The maximum data signal represents the requirements of the driving circuit under the most extreme conditions and serves as the basis for setting the voltage upper limit. By adding the first compensation data and the second compensation data, this basis can be fine-tuned to adapt to the real-time display conditions and circuit states. By compensating for the threshold voltage drift caused by changes in brightness and duty cycle, and eliminating the influence of historical voltages, the voltage adjustment of the Mux signal becomes more precise, improving the reliability of signal transmission. Dynamically adjusting the voltage of the Mux signal avoids unnecessary voltage excess, reduces the ineffective power consumption, extends the battery life, and at the same time reduces the heat generation, which helps to improve the service life and stability of the OLED panel.

[0064] In some embodiments, determining the first compensation data according to the current display brightness of the display panel and the duty cycle of the target control signal includes the following steps:

[0065] Step S3011, obtaining a first mapping relationship, where the first mapping relationship is the mapping relationship between the display brightness of the display panel, the duty cycle of the control signal, and the compensation data;

[0066] Step S3012, determining the first compensation data according to the first mapping relationship, the current display brightness of the display panel, and the duty cycle of the target control signal.

[0067] Specifically, the first mapping relationship is essentially a mathematical model or a look-up table that describes the functional relationship between the display brightness of the display panel, the duty cycle of the control signal, and the compensation data. The compensation data here is used to adjust the voltage of the Mux driving signal to cope with the effects brought about by changes in display brightness and duty cycle adjustment. By compensating for the signal distortion caused by changes in brightness and duty cycle, the signal integrity and accuracy are ensured, thereby improving the clarity, contrast, and color saturation of the image. Dynamically adjusting the compensation data makes the driving voltage more precise, avoiding the energy waste caused by excessive voltage, reducing the power consumption of the panel during operation, and helping to extend the battery life of the device. Among them, the first mapping relationship is shown in Table 1:

[0068] Table 1. First mapping relationship table

[0069] DBV (Current Display Brightness) Duty (Duty Cycle) A Gain (First Compensation Data) DBV = 2 nit 10％ 1.5 …… …… …… DBV = 1000 nit 100％ 1.0

[0070] In some embodiments, obtaining the second compensation data includes the following steps:

[0071] Step S3021, obtaining a second mapping relationship, where the second mapping relationship is the mapping relationship between the high-level voltage value of the previous pulse of the control signal, the low-level voltage value of the previous pulse of the control signal, and the compensation data;

[0072] Step S3022: Determine the second compensation data according to the above second mapping relationship, the high-level voltage value of the previous pulse of the target control signal, and the low-level voltage value of the previous pulse of the target control signal.

[0073] Specifically, in OLED display driving, the high-level voltage value (VGH) of the Mux control signal directly affects the conduction degree of the transistor, and thus affects the transmission efficiency of the data signal. However, due to the characteristics of the circuit, especially the threshold voltage of the transistor may be affected by the previous signal voltage, this phenomenon is particularly obvious in consecutive frames or between rows, which may lead to unstable signal transmission or increased power consumption. The second mapping relationship is a function or model that associates the high-level voltage value of the previous pulse of the control signal with the compensation data for its impact on subsequent signal transmission. This relationship may be established through experimental data, circuit simulation, or theoretical derivation, and is used to quantify the hysteresis effect of VGH on the transistor state and how to correct this effect through compensation. By adjusting the second compensation data, the distortion of the data signal caused by the drift of the transistor threshold voltage can be reduced, ensuring that the signal intensity and accuracy received by each pixel unit meet the expectations, thereby improving the overall quality of the image. The real-time adjustment of the second compensation data shortens the time for the transistor state to stabilize and speeds up the conversion speed from one state to another, which is particularly important for application scenarios with a high refresh rate, such as gaming or sports screen display, and can provide a smoother visual experience.

[0074] Among them, the second mapping relationship is shown in Table 2:

[0075] Table 2. Second Mapping Relationship Table

[0076] In some embodiments, determining the high-level voltage value of the target control signal according to at least the above first compensation data, the above second compensation data, and the above maximum data signal includes the following steps:

[0077] Step S30311: Determine the first compensation value as the product of the above first compensation data and the above second compensation data;

[0078] Among them, in OLED display technology, the transmission of signals is affected by various factors, including but not limited to the brightness of the display panel, the duty cycle of the signal, and the historical voltage state inside the circuit. The first compensation data compensates for the change in voltage demand caused by changes in display conditions (such as brightness and duty cycle), while the second compensation data takes into account the influence of historical pulse voltages on the current signal, such as self-heating effect, threshold voltage drift, etc. Multiplying the two can comprehensively reflect the combined influence of these factors on voltage demand. The calculation of the first compensation value is not a simple addition, but in a multiplicative way, which usually indicates that there is an interdependent or enhancing effect between these factors. For example, when the display brightness is extremely high and the duty cycle is high, the first compensation data may be relatively large; at the same time, if the high-level voltage value of the previous pulse is also very high, the second compensation data may also be large, and multiplying the two will further increase the compensation value to cope with more demanding display conditions and circuit states.

[0079] Step S30312: Determine the high-level voltage value of the target control signal as the sum of the above first compensation value and the above maximum data signal.

[0080] Specifically, the high-level voltage value (Mux_H voltage value) of the target control signal directly determines the conduction ability of the transistor and the signal transmission efficiency. By combining the voltage value of the maximum data signal with the first compensation value, it is possible to cover all data signal requirements while compensating for the threshold voltage shift caused by changes in display brightness, duty cycle, and historical voltage state, ensuring the reliability of signal transmission. The maximum data signal sets the upper limit of the voltage to ensure that the most extreme data signals can also be driven; while the first compensation value is a correction of the basic voltage value based on the current display conditions and historical voltage state. The result of adding the two is an optimized Mux_H voltage value that adapts to the current display conditions and circuit state.

[0081] In some embodiments, determining the high-level voltage value of the target control signal based on at least the above first compensation data, the above second compensation data, and the above maximum data signal includes the following steps:

[0082] Step S30321: Obtain third compensation data, where the third compensation data is a first set value obtained based on historical data;

[0083] Among them, the third compensation data is a first set value obtained through statistical analysis of historical data, which mainly focuses on the long-term trends or average influences in historical display and driving modes. Historical data may include previous display brightness, signal duty cycle, and various voltage states experienced during panel driving.

[0084] Step S30322: Determine the product of the above first compensation data, the above second compensation data, and the above third compensation data as the second compensation value;

[0085] Among them, the second compensation value is generated by multiplying the first compensation data, the second compensation data, and the third compensation data. These three compensation data are respectively for different influence sources: the immediate display conditions (brightness and duty cycle), the voltage value of the historical pulse, and the long-term performance change trend. Multiplying them means that when calculating the high-level voltage value, the influence degrees of these factors will be comprehensively considered to ensure that the voltage adjustment is both timely and comprehensive.

[0086] Step S30323: Determine the high-level voltage value of the target control signal as the sum of the above-mentioned second compensation value and the above-mentioned maximum data signal.

[0087] Specifically, adding the second compensation value to the maximum data signal, the obtained high-level voltage value of the target control signal is the voltage setting finally applied to the driving circuit. The maximum data signal represents the maximum voltage demand that may appear on the data channel in the current display frame. By adding the second compensation value, it can be ensured that even under the most extreme data signal conditions, the driving voltage is sufficient to overcome the influence of all internal and external factors and complete the accurate transmission of data.

[0088] The calculation of the second compensation value takes into account the immediate display conditions and the long-term performance trend, avoids voltage surplus caused by overcompensation, reduces ineffective energy consumption, and helps to reduce the overall power consumption while ensuring the display performance. Due to considering the immediate display conditions and historical data, this method can better adapt to the changes in the display environment. Whether it is weak light indoors, strong light outdoors, or playing a fixed picture for a long time, corresponding voltage adjustments can be made to maintain the consistency and stability of the display effect.

[0089] That is, in the actual application process, a compensation value can be obtained according to steps S30311 - S30312 based on the first compensation data and the second compensation data, and then the sum is calculated with the maximum data signal to obtain the high-level voltage value of the target control signal. Or steps S30321 - S30322 can be used to obtain a compensation value based on the first compensation data, the second compensation data, and the third compensation data, and then the sum is calculated with the maximum data signal to obtain the high-level voltage value of the target control signal. Both embodiments can calculate the high-level voltage value of the target control signal. Only by adding the third compensation data and taking historical data into account can a high-level voltage value that better meets the requirements be obtained.

[0090] In some embodiments, determining the low-level voltage value of the target control signal based at least on the current display brightness of the above-mentioned display panel, the duty cycle of the above-mentioned target control signal, and the above-mentioned target difference includes the following steps:

[0091] Step S401: Determine corresponding fourth compensation data according to the current display brightness of the above display panel and the duty cycle of the above target control signal;

[0092] Among them, the calculation of the fourth compensation data aims to compensate for the brightness requirement under the current display conditions and the working state of the transistor, ensuring that the low-level state (Mux_L) of the Mux signal can effectively control the turn-off of the transistor under different brightness and duty cycles, without problems such as signal leakage or incomplete turn-off of the transistor caused by insufficient voltage.

[0093] Step S402: Obtain fifth compensation data, where the fifth compensation data is related to the high-level voltage value and low-level voltage value of the previous pulse of the above target control signal;

[0094] Among them, the fifth compensation data is related to the low-level voltage value of the previous pulse of the target control signal. In OLED display technology, the state of the previous pulse of the control signal affects the voltage requirement of the current signal. Especially when the low-level voltage of the previous pulse is significantly different from the current target low-level voltage, residual voltage may be left on the signal line, affecting the normal turn-off state of the transistor.

[0095] Step S403: Determine the low-level voltage value of the above target control signal based on at least the above fourth compensation data, the above fifth compensation data, and the above target difference.

[0096] Specifically, the existence of the target difference means that there may be significant differences in the data signals of different rows of the display panel, which poses a challenge to the low-level voltage value of the Mux signal. By combining the fourth compensation data, the fifth compensation data with the target difference, it can be ensured that the Mux signal can effectively cope with the inter-row differences of the data signals while adapting to the current display brightness, duty cycle, and the influence of the low-level voltage of the previous pulse, ensuring the integrity and accuracy of the signal.

[0097] In some embodiments, obtaining the fifth compensation data includes the following steps:

[0098] Step S4021: Obtain a third mapping relationship, where the third mapping relationship is the mapping relationship between the high-level voltage value of the previous pulse of the control signal, the low-level voltage value of the previous pulse of the control signal, and the compensation data;

[0099] The third mapping relationship correlates the quantization relationship between the high-level voltage value and the low-level voltage value of the previous pulse of the control signal and the compensation data required currently. Obtaining this mapping relationship usually requires a large amount of data collection and analysis, including the performance indicators of the display panel, such as response time, power consumption, display quality, etc. at different high-level and low-level voltage values. Through machine learning algorithms or other statistical methods, the rules can be extracted from these data to form a predictable mathematical model, that is, the third mapping relationship.

[0100] Step S4022: Determine the fifth compensation data according to the above-mentioned third mapping relationship, the high-level voltage value of the previous pulse of the above-mentioned target control signal, and the low-level voltage value of the previous pulse of the above-mentioned target control signal.

[0101] Specifically, the determination of the fifth compensation data is based on the third mapping relationship established in step S4021 and the high-level and low-level voltage values of the previous pulse of the target control signal. This means that the system will calculate a compensation value according to the voltage state of the previous pulse and the preset mapping relationship to adjust the control signal of the next pulse, ensuring that the driving circuit can work more accurately and efficiently under the new display conditions.

[0102] In actual operation, each pulse of the control signal will experience a transition from high level to low level, and this process may generate voltage deviations due to various factors, thereby affecting the signal integrity and display effect. The core of steps S4021 and S4022 lies in dynamically calculating the fifth compensation data through in-depth analysis of the historical voltage state (mapping relationship) to correct the voltage output of the control signal and ensure that each frame of display reaches the optimal state. The system can monitor the changes in display conditions in real time, including brightness, color, image content, etc., and calculate the compensation data through the third mapping relationship according to the high-level and low-level voltage values of the previous pulse to ensure that the voltage output is closely synchronized with the display requirements.

[0103] Among them, in some embodiments, the third mapping relationship is the same as the second mapping relationship, both as shown in Table 2.

[0104] In some embodiments, determining the low-level voltage value of the above-mentioned target control signal at least according to the above-mentioned fourth compensation data, the above-mentioned fifth compensation data, and the above-mentioned target difference includes the following steps:

[0105] Step S40311: Determine the product of the above-mentioned fourth compensation data and the above-mentioned fifth compensation data as the third compensation value;

[0106] The third compensation value is generated by multiplying the fourth compensation data and the fifth compensation data. Here, the fourth compensation data reflects the demand for the driving voltage based on the current display brightness and the duty ratio of the target control signal, while the fifth compensation data is the historical compensation data based on the low-level voltage value of the previous pulse and its impact on subsequent displays. The product of the two means that while considering the current display conditions, the degree of influence of the historical signal state is also fully taken into account, thereby generating a more comprehensive and accurate compensation value.

[0107] Step S40312, determine the low-level voltage value of the target control signal as the sum of the above-mentioned third compensation value and the above-mentioned target difference.

[0108] Specifically, calculating the low-level voltage value of the target control signal based on the sum of the third compensation value and the target difference can eliminate the phenomenon of uneven brightness caused by insufficient or excessive signal strength, and ensure that the entire display screen maintains a consistent display effect under different brightnesses and image contents. The addition of the third compensation value ensures that the adjustment of the low-level voltage is neither excessive nor insufficient, thereby avoiding unnecessary energy consumption, reducing the total power consumption of the system, and increasing the battery life of portable or battery-powered devices.

[0109] In some embodiments, determining the low-level voltage value of the target control signal based on at least the above-mentioned fourth compensation data, the above-mentioned fifth compensation data, and the above-mentioned target difference includes the following steps:

[0110] Step S40321, obtain the sixth compensation data, where the sixth compensation data is the second set value obtained according to historical data;

[0111] At this stage, the system first determines a second set value, that is, the sixth compensation data, by analyzing historical data. This step mainly focuses on the long-term accumulated changes in display characteristics, including but not limited to the aging of OLED materials, the drift of driving circuit characteristics, and the influence of environmental factors. The sixth compensation data reflects the influence of these long-term changes on the display effect and energy efficiency, and is a parameter that is gradually adjusted according to the device operation history and environmental changes.

[0112] Step S40322, determine the fourth compensation value as the product of the above-mentioned fourth compensation data, the above-mentioned fifth compensation data, and the above-mentioned sixth compensation data;

[0113] Next, the system performs a multiplication operation on the fourth compensation data, the fifth compensation data, and the sixth compensation data to generate a fourth compensation value. Among them, the fourth compensation data may be related to the brightness and color information of the current display content, reflecting the voltage adjustment requirements under the current display conditions; the fifth compensation data takes into account the impact of recent display activities on the circuit state and is a short-term compensation value based on the state of the previous pulse voltage. The sixth compensation data, as a long-term trend compensation, ensures that the system can cope with the gradual changes that occur over time. By multiplying these three compensation data, the system can comprehensively consider the current display requirements, the impact of recent operations, and the long-term device characteristic changes to generate a comprehensive compensation value to meet the precise voltage adjustment requirements of the current and future display conditions.

[0114] Step S40323: Determine the low-level voltage value of the target control signal as the sum of the above-mentioned fourth compensation value and the above-mentioned target difference.

[0115] Specifically, add the fourth compensation value to the target difference to determine the low-level voltage value of the target control signal. The target difference usually represents the gap between the currently required voltage value and the actual measured value. This step ensures that when the drive circuit outputs a low-level voltage, it can accurately compensate for all the above factors to achieve the best display effect and energy efficiency management. The introduction of the target difference is for immediate adjustment to make up for any errors that may be caused by factors not considered in the fourth compensation value. By adding the fourth compensation value to the target difference, the system can generate an accurate low-level voltage value, ensuring that the drive signal can accurately and efficiently execute the display command while considering historical and current conditions, reducing unnecessary energy consumption and display defects.

[0116] That is, in the actual application process, the steps S40311 - S40312 can be used to obtain a compensation value based on the fourth compensation data and the fifth compensation data, and then calculate the sum with the target difference to obtain the low-level voltage value of the target control signal. Or the steps S40321 - S40322 can be used to obtain a compensation value based on the fourth compensation data, the fifth compensation data, and the sixth compensation data, and then calculate the sum with the target difference to obtain the low-level voltage value of the target control signal. Both embodiments can calculate the low-level voltage value of the target control signal. However, by adding the sixth compensation data and taking historical data into account, a high-level voltage value that better meets the requirements can be obtained.

[0117] Figure 4 Schematic diagram of a Mux signal in the prior art, as Figure 4As shown, in the prior art, the Mux signal uses fixed Mux_H (high voltage) and Mux_L (low voltage) to control the on and off of transistors. Generally, the fixed Mux_H (high voltage) is 8V, and the fixed Mux_L (low voltage) is -7V. However, when the voltage of Mux_H or Mux_L is increased, that is, the control voltage of the transistor increases, this will directly lead to an increase in power consumption. The reason is that a higher control voltage means that when the transistor switches states (from off to on or from on to off), there will be a larger current transient. According to the formula P = IV (power = current × voltage), when both the voltage and current increase, the instantaneous power consumption will also increase significantly. This additional instantaneous power consumption occurs in each pixel update cycle, and when accumulated, it will significantly increase the power consumption of the entire display panel. Moreover, higher voltage and current transients will also increase electromagnetic interference (EMI).

[0118] Figure 5 A schematic diagram of a target control signal provided according to an embodiment of the present application is shown as Figure 5 shown. It can be seen that the high and low levels of the target control signal (i.e., the Mux signal) in the embodiment of the present application are not fixed, but are adjusted in real time according to the actual situation, which can reduce unnecessary power consumption while meeting the display requirements. Figure 6 A schematic diagram of a data signal provided according to an embodiment of the present application is shown as Figure 5 and Figure 6 shown. It can be seen that the data signal has an impact on the Mux signal, that is, their signal waveforms are the same, but the specific signal values are not exactly the same.

[0119] In some embodiments, the above method further includes the following steps:

[0120] Step S501: Obtain a first power supply signal, a second power supply signal, and a third power supply signal. The above first power supply signal and the above second power supply signal are both analog power supply voltages. The first power supply signal is a positive voltage signal, the second power supply signal is a negative voltage signal, and the third power supply signal is the analog power supply voltage of the driver of the display panel. The third power supply signal includes a positive voltage signal and a negative voltage signal;

[0121] Among them, the first power supply signal is the AVDD signal in the display panel, the second power supply signal is the AVEE signal in the display panel, and the third power supply signal is the VCL signal in the display panel.

[0122] Step S502: Determine a first target signal line for providing the high-level voltage value of the target control signal according to the magnitude relationship between the high-level voltage value of the above target control signal, the above first power supply signal, and the above third power supply signal;

[0123] Based on the comparison of the high-level voltage value of the target control signal with the AVDD and VCL signals, select the first target signal line that can provide the required high-level voltage most effectively and stably. This usually means that the voltage of the selected signal line is closest to the target high-level voltage, or after considering the load effect and line voltage drop, its voltage is still high enough.

[0124] Step S503, determine the second target signal line that provides the low-level voltage value of the target control signal according to the magnitude relationship among the low-level voltage value of the above-mentioned target control signal, the above-mentioned second power supply signal, and the above-mentioned third power supply signal;

[0125] By comparing the low-level voltage value of the target control signal with the relationship between AVEE and the VCL signal, determine the second target signal line that can provide this low-level voltage. This step also emphasizes voltage matching and stability to ensure the accuracy of the low-level signal.

[0126] Step S504, use the above-mentioned first target signal line to provide the high-level voltage value of the target control signal, and use the above-mentioned second target signal line to provide the low-level voltage value of the above-mentioned target control signal, so as to input the above-mentioned target control signal to the control terminal of the selection transistor in the above-mentioned display panel.

[0127] Specifically, the system inputs the high-level and low-level voltage values of the target control signal to the control terminal of the selection transistor (usually TFTs, thin-film transistors) in the display panel through the previously selected first target signal line and second target signal line respectively. In this way, the accurate switching of the transistor is ensured, thereby controlling the lighting and extinguishing of the OLED pixels to achieve precise display.

[0128] The above steps can reduce voltage fluctuations and signal noise, reduce system power consumption, enhance the stability and reliability of the system, and reduce the circuit failure rate by selecting the most suitable signal line to provide voltage.

[0129] In some embodiments, the above-mentioned first power supply signal is a positive voltage signal greater than the above-mentioned third power supply signal. The above-mentioned first power supply signal is the signal provided by the first power supply signal line, and the above-mentioned third power supply signal is the signal provided by the third power supply signal line. According to the magnitude relationship among the high-level voltage value of the above-mentioned target control signal, the above-mentioned first power supply signal, and the above-mentioned third power supply signal, determine the first target signal line that provides the high-level voltage value of the above-mentioned target control signal, including the following steps:

[0130] Step S5021, when the high-level voltage value of the above-mentioned target control signal is less than the above-mentioned first power supply signal and less than the positive voltage signal of the above-mentioned third power supply signal, determine the third power supply signal line as the above-mentioned first target signal line;

[0131] When the high-level voltage value of the target control signal is lower than the positive voltage part (VCL+) of the first power supply signal (AVDD) and the third power supply signal, it indicates that the current required high-level voltage is relatively low and not sufficient to utilize the high-voltage resources of AVDD. In this case, the signal VCL is selected as the first target signal line and a high voltage is provided. In this situation, using +VCL as the first target signal line to provide voltage can avoid wasting AVDD resources, reduce energy loss during the voltage conversion process, and improve energy efficiency. The selection of the +VCL signal line ensures that the system can operate more economically and efficiently under low voltage requirements.

[0132] Step S5022, when the high-level voltage value of the above target control signal is less than the above first power supply signal and greater than the above third power supply signal, determine the above first power supply signal line as the above first target signal line;

[0133] If the high-level voltage value of the target control signal is between AVDD and VCL+, then although the voltage of VCL+ is not sufficient to meet the demand, AVDD can. Therefore, the AVDD signal line (the first power supply signal line) is determined as the first target signal line to provide the target high-level voltage.

[0134] Step S5023, when the high-level voltage value of the above target control signal is greater than or equal to the above first power supply signal and greater than or equal to the above third power supply signal, determine both the above first power supply signal line and the above third power supply signal line as the above first target signal line.

[0135] Specifically, when the high-level voltage value of the target control signal is at least equal to or higher than the voltages of AVDD and VCL+, it indicates that the system needs to operate at a relatively high voltage level. At this time, both AVDD and VCL+ (the positive voltage part) can provide the necessary voltage support. Therefore, both AVDD and VCL+ (the first power supply signal line and the third power supply signal line) are regarded as part of the first target signal line to ensure that sufficient voltage can be provided under different display conditions.

[0136] Since the AVDD voltage is higher and the power consumption generated is higher, the VCL with lower power consumption is preferably used to provide voltage. If the voltage provided by VCL cannot meet the demand, then AVDD is used to provide voltage.

[0137] In some embodiments, the second power supply signal is a negative voltage signal smaller than the third power supply signal. The second power supply signal is the signal provided by the second power supply signal line, and the third power supply signal is the signal provided by the third power supply signal line. According to the low-level voltage value of the target control signal and the magnitude relationship between the second power supply signal and the third power supply signal, determining the second target signal line that provides the low-level voltage value of the target control signal includes the following steps:

[0138] Step S5031, when the absolute value of the low-level voltage value of the target control signal is less than the absolute value of the second power supply signal and less than the absolute value of the negative voltage signal of the third power supply signal, determine the third power supply signal line as the second target signal line;

[0139] When the absolute value of the low-level voltage value required by the target control signal (the value is negative, indicating a voltage drop relative to the ground potential) is less than the absolute values of the second power supply signal (AVEE) and the third power supply signal (VCL-), it means that the current low-level demand can be met by VCL- (the third power supply signal line). This is because the voltage range of VCL- is more suitable for providing a smaller, negative-direction voltage adjustment to meet the display requirements in the light load or low-power consumption state. Using VCL- as the second target signal line can reduce energy waste and improve the overall energy efficiency of the system when the low-level voltage demand is low. At the same time, since the change range of the VCL- voltage signal is closer to the current demand, this also helps to reduce electromagnetic interference (EMI) during signal conversion and improve the purity and stability of the display signal.

[0140] Step S5032, when the absolute value of the low-level voltage value of the target control signal is less than the absolute value of the second power supply signal and greater than the absolute value of the negative voltage signal of the third power supply signal, determine the second power supply signal line as the second target signal line;

[0141] When the low-level voltage value of the target control signal is within the interval between the absolute values of AVEE and VCL-, it indicates that VCL- cannot provide sufficient voltage support alone, and the voltage range of AVEE is more suitable for the current low-level demand. At this time, the second power supply signal line (providing the AVEE signal) should be selected as the second target signal line to provide the low-level voltage value of the target control signal. By selecting AVEE as the second target signal line, it can ensure that when a larger voltage drop amplitude is required, the system can provide sufficient potential difference, thereby effectively driving the OLED pixel into the non-active state and reducing brightness residue or display errors.

[0142] Step S5033: When the absolute value of the low-level voltage value of the above-mentioned target control signal is greater than or equal to the absolute value of the above-mentioned second power supply signal and greater than or equal to the absolute value of the negative voltage signal of the above-mentioned third power supply signal, both the above-mentioned second power supply signal line and the above-mentioned third power supply signal line are determined as the above-mentioned second target signal lines.

[0143] Specifically, when the absolute value of the low-level voltage value of the target control signal is at least equivalent to or even greater than the voltage ranges of AVEE and -VCL, it indicates that the system needs to operate under extreme voltage conditions, perhaps because the display panel needs to process images with high contrast or maintain good display effects under specific conditions. At this time, the second power supply signal line (AVEE) and the third power supply signal line (-VCL) are both marked as part of the second target signal lines and jointly undertake the task of providing the low-level voltage.

[0144] Since the AVEE voltage is lower and the power consumption generated is higher, VCL with lower power consumption is preferably used to provide voltage. If the voltage provided by VCL cannot meet the requirements, AVEE is then used to provide voltage.

[0145] In some embodiments, after determining the high-level voltage value of the target control signal according to the above-mentioned maximum data signal and determining the low-level voltage value of the target control signal according to the above-mentioned target difference, the above-mentioned method further includes the following steps:

[0146] Step S601: Obtain a fourth mapping relationship, where the fourth mapping relationship is the mapping relationship between the data signal difference and the rising time of the control signal, and the rising time is the time required for the control signal to rise from the low level to the high level or the time required for the control signal to fall from the high level to the low level;

[0147] Step S602: Determine the rising time of the target control signal according to the above-mentioned target difference and the above-mentioned fourth mapping relationship.

[0148] Specifically, the adjustment of the rising time of the control signal directly affects the response speed and accuracy of the driving circuit to the display data. If the data signal difference is large, a longer rising time may be required to ensure a smooth transition and avoid display defects or excessive circuit stress caused by voltage mutations. Conversely, if the data signal difference is small, a shorter rising time can reduce unnecessary waiting and power consumption, and improve the display refresh rate and energy efficiency.

[0149] By precisely calculating the rise time of the control signal, flickering, residual images, or color distortion during the display update can be avoided, improving the clarity and stability of the image. Especially when processing high-dynamic-range or fast-paced video content, the optimized rise time can significantly enhance the visual experience. The dynamic adjustment of the rise time helps balance the load on the circuit. Especially in display updates with large differences in data signals, the slowly increasing control signal can reduce the impact on the circuit and extend its service life.

[0150] Among them, the fourth mapping relationship is shown in Table 3:

[0151] Table 3. Fourth Mapping Relationship Table

[0152] △V (Target Difference) Rising EQ Value Falling EQ Value 0V 300 ns 200 ns …… …… …… 6V 10 ns 10 ns

[0153] Among them, Rising EQ Value is the time required for the target control signal to rise from a low level to a high level, and Falling EQ Value is the time required for the target control signal to fall from a high level to a low level.

[0154] In some embodiments, the above method further includes the following steps:

[0155] Step S701, set a preset intermediate voltage;

[0156] Step S702, during the process of the above target control signal rising from a low level to a high level, control the above target control signal to first rise from a low level to the above preset intermediate voltage, and then control the above target control signal to rise from the above preset intermediate voltage to a high level.

[0157] Specifically, the signal first rises from a low level to a preset intermediate voltage, and then rises from this intermediate voltage to the final high level. This step-by-step voltage rise strategy helps smooth the slope of the signal, reduce the peak value of transient current, thereby reducing EMI and saving power consumption. The phased rise can reduce the rate of transient change of the control signal, thereby reducing the electromagnetic radiation generated during the rapid change of the signal. This plays an important role in reducing electromagnetic interference within the system and improving the compatibility between the display panel and other electronic components. A rapid voltage change will cause a violent fluctuation of the current, thereby increasing the power consumption. By first rising to the intermediate voltage and then gradually rising to the high level, this phenomenon can be avoided, achieving more efficient energy use and extending the battery life of mobile devices.

[0158] Figure 7 A signal schematic diagram during the process of the target control signal level rising according to an embodiment of the present application is as Figure 7As shown, the target control signal first climbs from a low level to a preset intermediate voltage V1, and then climbs to a high level. Generally, the preset intermediate voltage V1 is the ground voltage or 0V. The power P during the rising process of the target control signal level is P = I1×V1 + I2×V2. If V1 = GND, then P = I2×V2.

[0159] This embodiment relates to a control method for a specific display panel. As Figure 8 shown, it includes the following steps:

[0160] Step S1: First, confirm the maximum and minimum data voltage values (i.e., the maximum data signal and the minimum data signal) in the source lines from the first to the 1080th (for example).

[0161] Step S2: For SDL, calculate the data voltage difference between the (N + 1)th row and the Nth row to confirm △V (i.e., the target difference). For DDL, calculate the data voltage difference between the (N + 2)th row and the Nth row to confirm △V (i.e., the target difference).

[0162] Step S3: Confirm A (the first compensation data and the fourth compensation data) according to the current display brightness (DBV) of the display panel and the duty cycle (Duty) of the target control signal, and determine B (the second compensation data and the fifth compensation data) according to the high - level voltage value and the low - level voltage value of the previous pulse of the target control signal (Previous line Mux_H / Mux_L).

[0163] Step S4: Use the formulas Mux_H = Max Data (the maximum data signal)+Offset1 (the third compensation data)×A (the first compensation data)×B (the second compensation data) and Mux_L = △V (the target difference)+Offset2 (the sixth compensation data)×A (the fourth compensation data)×B (the fifth compensation data).

[0164] Step S5: If Mux_H is less than AVDD or +VCL, then use AVDD or +VCL to generate the Mux_H voltage, and prefer +VCL; if the absolute value of Mux_L is less than the absolute value of AVEE or the absolute value of -VCL, then use AVEE or -VCL to generate the Mux_L voltage, and prefer -VCL.

[0165] Step S6: Calculate △V, formulate a Mux_EQ value table corresponding to △V, and automatically adjust the EQ value of each row according to different △V. Among them, Mux_H is the state when the circuit is off, and in this case, EQ does not need to be turned on. If the signal is Mux_L, according to different charging speeds, when charging is very fast, turning on EQ can achieve the purpose of power saving.

[0166] Comparative example

[0167] Provide a target control signal Mux, the high level VGH of its input to the red pixel R, blue pixel B, green pixel G, and fourth pixel W of SDL is 8V, the low level VGL is -7.5V, and the power consumption is 100%. The high level VGH of its input to the red pixel R, blue pixel B, green pixel G, and fourth pixel W of DDL is 8V, the low level VGL is -7.5V, and the power consumption is 100%.

[0168] Example 1

[0169] Provide a display panel with a specification of 1000 nit (1V to 7V) and a target control signal Mux. The high level VGH of the target control signal Mux input to the red pixel R, blue pixel B, and green pixel G of SDL is 7V, the low level VGL is -7.5V, the power is 65.5 mW, and the power consumption is 93.5%. The high level VGH of the target control signal Mux input to the fourth pixel W of SDL is 4V, the low level VGL is -3V, the power is 31.6 mW, and the power consumption is 45.2%.

[0170] The high level VGH of the target control signal Mux input to the red pixel R, blue pixel B, and green pixel G of DDL is 7V, the low level VGL is -3V, the power is 25.8 mW, and the power consumption is 64.5%. The high level VGH of the target control signal Mux input to the fourth pixel W of DDL is 2V, the low level VGL is -3V, the power is 12.9 mW, and the power consumption is 32.3%.

[0171] Example 2

[0172] Provide a display panel with a specification of 100 nit (4V to 7V) and a target control signal Mux. The high level VGH of the target control signal Mux input to the red pixel R, blue pixel B, and green pixel G of SDL is 7V, the low level VGL is -7.5V, the power is 65.5 mW, and the power consumption is 93.5%. The high level VGH of the target control signal Mux input to the fourth pixel W of SDL is 4V, the low level VGL is 0V, the power is 18.1 mW, and the power consumption is 28.5%.

[0173] The high level VGH of the target control signal Mux input to the red pixel R, blue pixel B, and green pixel G of the DDL is 7V, the low level VGL is 0V, the power is 31.6 mW, and the power consumption is 79.0%. The high level VGH of the target control signal Mux input to the fourth pixel W of the DDL is 5V, the low level VGL is 0V, the power is 22.6 mW, and the power consumption is 56.5%.

[0174] The data comparison tables of the comparative example, Example 1, and Example 2 are shown in Table 4 as follows:

[0175] Table 4. Data comparison tables of the comparative example, Example 1, and Example 2

[0176]

[0177] It can be clearly seen from the above data comparison tables that the target control signal Mux obtained by using the embodiment of the present application can significantly reduce the power consumption when applied to display panels of different specifications.

[0178] Based on the same inventive concept, the embodiment of the present application also provides a display panel, as Figure 9 shown. The display panel 100 includes a multiplexer, a plurality of pixels, a plurality of pixel driving circuits, and a plurality of selection transistors. The above pixels correspond to the above pixel driving circuits one by one, and one row of the above pixels corresponds to one of the above selection transistors. Among them, the high level voltage value of the target control signal output by the multiplexer is determined according to the maximum data signal. The target control signal is used to control the conduction or cutoff of the selection transistor. The low level voltage value of the target control signal is determined according to the target difference. The maximum data signal is the maximum value of all data signals. The target difference is the difference between the maximum data signal and the minimum data signal. The difference of the minimum data signal is the minimum value of all data signals.

[0179] The above display panel of the present application adjusts the control signal output by the multiplexer in real time according to the data signal, so that the control signal output by the multiplexer is not a fixed voltage value, thereby reducing the power consumption of the display panel and solving the problem that in the existing OLED display driving circuit, the fixed voltage settings of the high level and low level of the multiplexer will result in higher power consumption and greater electromagnetic interference of the display panel.

[0180] In specific implementation, in the implementation of the present invention, a display device is further provided. The display device includes a display panel. The display device provided in this embodiment can be an array substrate or a terminal display device, such as a mobile phone, a computer, a television, or other display devices with display functions. The present invention does not make specific limitations on this. The display device provided in the embodiment of the present invention has the beneficial effects of the pixel driving circuit provided in the embodiment of the present invention. For specific descriptions of the gate driving circuit, they will not be elaborated in this embodiment.

[0181] It should also be noted that the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of another identical element in the process, method, commodity or device including the element.

[0182] From the above description, it can be seen that the above embodiments of the present application achieve the following technical effects:

[0183] 1), In the above control method of the display panel of the present application, first, the maximum value and the minimum value of all data signals are obtained to obtain the maximum data signal and the minimum data signal; then, the difference between the maximum data signal and the minimum data signal is determined as the target difference; finally, the high-level voltage value of the target control signal is determined according to the maximum data signal, and the low-level voltage value of the target control signal is determined according to the target difference. The target control signal is the control signal output by the multiplexer in the display panel, and the target control signal is used to control the selection transistor to conduct or turn off. Among them, when the selection transistor conducts, the data signal is transmitted to the corresponding pixel driving circuit, and the display panel displays the corresponding picture. This method adjusts the control signal output by the multiplexer in real time according to the data signal in the display panel, so that the control signal output by the multiplexer is not a fixed voltage value, thereby reducing the power consumption of the display panel and solving the problem that in the existing OLED display driving circuit, the fixed voltage settings of the high level and the low level of the multiplexer will cause the display panel to have higher power consumption and greater electromagnetic interference.

[0184] 2), The above display panel of the present application adjusts the control signal output by the multiplexer in real time according to the data signal, so that the control signal output by the multiplexer is not a fixed voltage value, thereby reducing the power consumption of the display panel and solving the problem that in the existing OLED display driving circuit, the fixed voltage settings of the high level and the low level of the multiplexer will cause the display panel to have higher power consumption and greater electromagnetic interference.

[0185] The above are only the preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A control method for a display panel, characterized in that, Including: Obtain the maximum value and the minimum value of all data signals to obtain a maximum data signal and a minimum data signal; Determine the difference between the maximum data signal and the minimum data signal as a target difference; Determine a high-level voltage value of a target control signal according to the maximum data signal, and determine a low-level voltage value of the target control signal according to the target difference. The target control signal is a control signal output by a multiplexer in a display panel, and the target control signal is used to control a selection transistor to conduct or turn off. Wherein, when the selection transistor conducts, the data signal is transmitted to a corresponding pixel driving circuit, and the display panel displays a corresponding picture.

2. The method according to claim 1, wherein Determine the difference between the maximum data signal and the minimum data signal as the target difference, including: When the display panel is driven by a single data line, determine the difference between the data signal corresponding to the (n + 1)-th row in the display panel and the data signal corresponding to the n-th row in the display panel as the target difference; When the display panel is driven by a double data line, determine the difference between the data signal corresponding to the (n + 2)-th row in the display panel and the data signal corresponding to the n-th row in the display panel as the target difference.

3. The method according to claim 1, characterized in that, Determine the high-level voltage value of the target control signal according to the maximum data signal, and determine the low-level voltage value of the target control signal according to the target difference, including: Obtain the current display brightness of the display panel and the duty cycle of the target control signal; Determine the high-level voltage value of the target control signal based on at least the current display brightness of the display panel, the duty cycle of the target control signal, and the maximum data signal; Determine the low-level voltage value of the target control signal based on at least the current display brightness of the display panel, the duty cycle of the target control signal, and the target difference.

4. The method according to claim 3, characterized in that, Determine the high-level voltage value of the target control signal based on at least the current display brightness of the display panel, the duty cycle of the target control signal, and the maximum data signal, including: Determine a first compensation data according to the current display brightness of the display panel and the duty cycle of the target control signal; Obtain a second compensation data, where the second compensation data is related to the high-level voltage value and the low-level voltage value of the previous pulse of the target control signal; Determine the high-level voltage value of the target control signal based on at least the first compensation data, the second compensation data, and the maximum data signal.

5. The method according to claim 4, characterized in that Determine the first compensation data according to the current display brightness of the display panel and the duty cycle of the target control signal, including: Obtain a first mapping relationship, where the first mapping relationship is a mapping relationship between the display brightness of the display panel, the duty cycle of the control signal, and the compensation data; Determine the first compensation data according to the first mapping relationship, the current display brightness of the display panel, and the duty cycle of the target control signal.

6. The method according to claim 4, characterized in that Obtain the second compensation data, including: Obtain a second mapping relationship, where the second mapping relationship is the mapping relationship between the high-level voltage value of the previous pulse of the control signal, the low-level voltage value of the previous pulse of the control signal, and the compensation data; Determine the second compensation data according to the second mapping relationship, the high-level voltage value of the previous pulse of the target control signal, and the low-level voltage value of the previous pulse of the target control signal.

7. The method according to claim 4, characterized in that Determine the high-level voltage value of the target control signal based on at least the first compensation data, the second compensation data, and the maximum data signal, including: Determine the product of the first compensation data and the second compensation data as the first compensation value; Determine the sum of the first compensation value and the maximum data signal as the high-level voltage value of the target control signal.

8. The method according to claim 4, characterized in that Determine the high-level voltage value of the target control signal based on at least the first compensation data, the second compensation data, and the maximum data signal, including: Obtain third compensation data, where the third compensation data is a first set value obtained according to historical data; Determine the product of the first compensation data, the second compensation data, and the third compensation data as the second compensation value; Determine the sum of the second compensation value and the maximum data signal as the high-level voltage value of the target control signal.

9. The method according to claim 3, characterized in that, Determine the low-level voltage value of the target control signal based on at least the current display brightness of the display panel, the duty cycle of the target control signal, and the target difference, including: Determine corresponding fourth compensation data according to the current display brightness of the display panel and the duty cycle of the target control signal; Obtain fifth compensation data, where the fifth compensation data is related to the high-level voltage value and the low-level voltage value of the previous pulse of the target control signal; Determine the low-level voltage value of the target control signal based on at least the fourth compensation data, the fifth compensation data, and the target difference.

10. The method according to claim 9, wherein Obtain fifth compensation data, including: Obtain a third mapping relationship, where the third mapping relationship is the mapping relationship between the high-level voltage value of the previous pulse of the control signal, the low-level voltage value of the previous pulse of the control signal, and the compensation data; Determine the fifth compensation data according to the third mapping relationship, the high-level voltage value of the previous pulse of the target control signal, and the low-level voltage value of the previous pulse of the target control signal.

11. The method according to claim 9, wherein Determine the low-level voltage value of the target control signal based on at least the fourth compensation data, the fifth compensation data, and the target difference, including: Determine the product of the fourth compensation data and the fifth compensation data as the third compensation value; Determine the sum of the third compensation value and the target difference as the low-level voltage value of the target control signal.

12. The method according to claim 9, wherein Determine the low-level voltage value of the target control signal based on at least the fourth compensation data, the fifth compensation data, and the target difference, including: Obtain sixth compensation data, where the sixth compensation data is a second set value obtained according to historical data; Determine the product of the fourth compensation data, the fifth compensation data, and the sixth compensation data as the fourth compensation value; Determine the sum of the fourth compensation value and the target difference as the low-level voltage value of the target control signal.

13. The method according to claim 1, wherein The method further includes: Obtain a first power supply signal, a second power supply signal, and a third power supply signal. Both the first power supply signal and the second power supply signal are analog power supply voltages. The first power supply signal is a positive voltage signal, the second power supply signal is a negative voltage signal, and the third power supply signal is the analog power supply voltage of the display panel. The third power supply signal includes a positive voltage signal and a negative voltage signal; Determine a first target signal line for providing the high-level voltage value of the target control signal according to the magnitude relationship among the high-level voltage value of the target control signal, the first power supply signal, and the third power supply signal; Determine a second target signal line for providing the low-level voltage value of the target control signal according to the magnitude relationship among the low-level voltage value of the target control signal, the second power supply signal, and the third power supply signal; Use the first target signal line to provide the high-level voltage value of the target control signal, and use the second target signal line to provide the low-level voltage value of the target control signal, so as to input the target control signal to the control terminal of the selection transistor in the display panel.

14. The method according to claim 13, wherein The first power supply signal is greater than the positive voltage signal of the third power supply signal. The first power supply signal is the signal provided by the first power supply signal line, and the third power supply signal is the signal provided by the third power supply signal line. Determining a first target signal line for providing the high-level voltage value of the target control signal according to the magnitude relationship among the high-level voltage value of the target control signal, the first power supply signal, and the third power supply signal includes: When the high-level voltage value of the target control signal is less than the first power supply signal and less than the positive voltage signal of the third power supply signal, determine the third power supply signal line as the first target signal line; When the high-level voltage value of the target control signal is less than the first power supply signal and greater than the third power supply signal, determine the first power supply signal line as the first target signal line; When the high-level voltage value of the target control signal is greater than or equal to the first power supply signal and greater than or equal to the third power supply signal, determine both the first power supply signal line and the third power supply signal line as the first target signal line.

15. The method according to claim 13, wherein The second power supply signal is less than the negative voltage signal of the third power supply signal. The second power supply signal is the signal provided by the second power supply signal line, and the third power supply signal is the signal provided by the third power supply signal line. Determining a second target signal line for providing the low-level voltage value of the target control signal according to the magnitude relationship among the low-level voltage value of the target control signal, the second power supply signal, and the third power supply signal includes: When the absolute value of the low-level voltage value of the target control signal is less than the absolute value of the second power supply signal and less than the absolute value of the negative voltage signal of the third power supply signal, determine the third power supply signal line as the second target signal line; When the absolute value of the low-level voltage value of the target control signal is less than the absolute value of the second power supply signal and greater than the absolute value of the negative voltage signal of the third power supply signal, the second power supply signal line is determined as the second target signal line; When the absolute value of the low-level voltage value of the target control signal is greater than or equal to the absolute value of the second power supply signal and greater than or equal to the absolute value of the negative voltage signal of the third power supply signal, both the second power supply signal line and the third power supply signal line are determined as the second target signal line.

16. The method according to claim 1, characterized in that, After determining the high-level voltage value of the target control signal according to the maximum data signal and determining the low-level voltage value of the target control signal according to the target difference, the method further includes: Obtaining a fourth mapping relationship, where the fourth mapping relationship is a mapping relationship between the data signal difference and the rise time of the control signal, and the rise time is the time required for the control signal to rise from the low level to the high level or the time required for the control signal to fall from the high level to the low level; Determining the rise time of the target control signal according to the target difference and the fourth mapping relationship.

17. The method according to claim 1, characterized in that The method further includes: Setting a preset intermediate voltage; During the process of the target control signal rising from the low level to the high level, controlling the target control signal to first rise from the low level to the preset intermediate voltage, and then controlling the target control signal to rise from the preset intermediate voltage to the high level.

18. A display panel, characterized in that, Including a multiplexer, a plurality of pixels, a plurality of pixel driving circuits, and a plurality of selection transistors, where the pixels and the pixel driving circuits are in one-to-one correspondence, and one row of the pixels corresponds to one of the selection transistors, wherein the high-level voltage value of the target control signal output by the multiplexer is determined according to the maximum data signal, the target control signal is used to control the conduction or cutoff of the selection transistor, the low-level voltage value of the target control signal is determined according to the target difference, the maximum data signal is the maximum value of all data signals, the target difference is the difference between the maximum data signal and the minimum data signal, and the minimum data signal difference is the minimum value of all data signals.

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