Driving method and apparatus of display panel, display apparatus

Abstract

The application discloses a display panel driving method and device, and a display device. The display panel driving method comprises: in a data writing stage, adjusting a change rate of a data signal and / or a voltage value of an analog power voltage signal, so that a power change amount of the analog power voltage signal when the data signal changes is less than a preset power change amount; and in a light emitting stage, driving a pixel unit to display based on the data signal according to a first gate control signal. When the data signal changes, the power change amount acting on the analog power voltage when the data signal changes can be reduced, and then the instantaneous large current of the analog power voltage signal can be reduced, the probability of damage and signal interference of a driving circuit is reduced, and the reliability of the display panel is improved. When the analog power voltage is provided by a power chip, the probability of replacing the power chip can be reduced, and the improvement probability of process equipment is reduced.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the technical field of display, and in particular, to a driving method and device of display panel, and display device. BACKGROUND

[0002] Organic Light-Emitting Diode (OLED) display panel has many advantages such as self-luminous, high contrast ratio, etc., and is a display panel with wide application prospect.

[0003] The display panel has a driving chip and a driving circuit, the driving chip includes a data driver for providing a data voltage for a pixel circuit in the driving circuit. In the moment when the data driver works, a transient large current of an analog power voltage signal of the driving chip is generated, which easily causes damage of the driving circuit and signal interference, and reduces the reliability of the display panel. SUMMARY

[0004] The present application provides a driving method and device of display panel, and display device, to reduce the transient large current of the analog power voltage, and improve the reliability of the display panel.

[0005] In a first aspect, embodiments of the present application provide a driving method of display panel, the display panel including a pixel unit, the driving method of display panel including:

[0006] In a data writing stage, adjusting a change rate of the data signal and / or a voltage value of the analog power voltage signal, so that a power change amount of the analog power voltage signal when the data signal changes is less than a preset power change amount;

[0007] In a light emitting stage, driving the pixel unit to display according to the data signal based on a first gate control signal.

[0008] Optionally, in the data writing stage, the power change amount of the analog power voltage signal when the data signal changes is adjusted according to the change rate of the data signal and / or the voltage value of the analog power voltage signal, and the power change amount is less than the preset power change amount, including:

[0009] In a first data writing stage, adjusting the analog power voltage to a first voltage; wherein the first voltage is less than a preset voltage of the analog power voltage;

[0010] In a second data writing stage, writing the data signal into the pixel unit; wherein the data signal is a data voltage of a current frame, and a starting time of the first data writing stage is at least not lagging behind a starting time of the second data writing stage.

[0011] Optionally, before the second data writing stage, further including:

[0012] controlling the data signal to be in a high impedance state.

[0013] Optionally, the difference between the first voltage and the preset voltage ranges from 0.3V to 0.5V.

[0014] Optionally, the writing of the data signal into the pixel unit comprises:

[0015] charging the data signal to the data voltage of the current frame multiple times, and writing the data signal into the pixel unit; the voltage after each charging is greater than the voltage after the previous charging.

[0016] Preferably, the charging of the data signal to the data voltage of the current frame multiple times comprises:

[0017] charging the data signal to the data voltage of the current frame in steps.

[0018] Optionally, after the writing of the data signal into the pixel unit, the method further comprises:

[0019] transmitting the data signal to a data input end of the pixel unit;

[0020] controlling a second gate control signal to be effective, so that the data signal is transmitted to a gate of a driving transistor of the pixel unit through the data input end, and the effective level of the second gate control signal is ahead of the effective level of the first gate control signal.

[0021] Optionally, the adjusting of the change rate of the data signal and / or the voltage value of the analog power voltage signal comprises:

[0022] charging the data signal to the pixel unit multiple times; the voltage after each charging is greater than the voltage after the previous charging.

[0023] Preferably, the charging of the data signal to the pixel unit multiple times comprises charging the data signal to the pixel unit in steps.

[0024] Optionally, the pixel unit comprises a pixel circuit and a light emitting unit; and the driving of the pixel unit to display based on the data signal according to the first gate control signal comprises:

[0025] in the light emitting stage, controlling the first gate control signal to be effective, so that the pixel circuit forms a driving current according to the data signal, and drives the light emitting unit to display.

[0026] In a second aspect, an embodiment of the present application further provides a driving device of a display panel, the display panel comprising a pixel unit, and the driving device of the display panel comprising:

[0027] The adjusting module is configured to adjust the change rate of the data signal and / or the voltage value of the analog power voltage signal in the data writing stage, so that the power change amount of the analog power voltage signal when the data signal changes is less than a preset power change amount.

[0028] The driving module is configured to drive the pixel unit to display based on the data signal according to the first gate control signal in the light emitting stage.

[0029] In a third aspect, the embodiment of the present application further provides a display device, comprising a display panel and the driving device of the display panel according to the second aspect; the display panel is connected with the driving device of the display panel, and the driving device of the display panel is configured to drive the display panel to display.

[0030] The technical scheme of the embodiment of the present application adjusts the change rate of the data signal and / or the voltage value of the analog power voltage signal in the data writing stage, so that the power change amount of the analog power voltage signal when the data signal changes is less than a preset power change amount, thereby reducing the instantaneous large current of the analog power voltage, reducing the probability of damage and signal interference of the driving circuit, and improving the reliability of the display panel. When the analog power voltage is provided by a power chip, the probability of replacing the power chip can be reduced, and the improvement probability of the process equipment is also reduced. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 A timing simulation schematic diagram of different signals of a driving chip provided by the related art;

[0032] Figure 2 A structural schematic diagram of a driving chip provided by the embodiment of the present application;

[0033] Figure 3 A flow schematic diagram of a driving method of a display panel provided by the embodiment of the present application;

[0034] Figure 4 A timing simulation schematic diagram of different signals of a driving chip provided by the embodiment of the present application;

[0035] Figure 5 A circuit schematic diagram of a pixel unit provided by the embodiment of the present application;

[0036] Figure 6 Another timing simulation schematic diagram of different signals of a driving chip provided by the embodiment of the present application;

[0037] Figure 7 Another timing simulation schematic diagram of different signals of a driving chip provided by the embodiment of the present application;

[0038] Figure 8A structural schematic diagram of a display panel driving device provided by an embodiment of the present application is shown in the figure.

[0039] Figure 9 A structural schematic diagram of a display device provided by an embodiment of the present application is shown in the figure. DETAILED DESCRIPTION

[0040] The present application will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely intended for the purpose of interpretation of the present application and not for the limitation of the present application. In addition, it should be noted that only the parts related to the present application are shown in the accompanying drawings for the purpose of description, rather than all the structures.

[0041] The display panel includes a driving chip and a driving circuit. The driving chip can include a data driver. The data driver is connected with the pixel circuit in the driving circuit and is used to provide a driving signal for the pixel circuit. The driving chip further includes a power supply module, which is used to form an analog voltage required by the pixel circuit and the gate driving circuit in the driving circuit according to an analog power voltage signal. The analog power voltage signal can be provided by a power IC or a mainboard connected with the display panel. In the process of the driving chip, at the moment when the data driver is powered on, due to external reasons of the driving chip, a transient large current of the analog power voltage signal is generated, which can easily cause damage to the pixel circuit and the gate driving circuit and signal interference, and reduce the reliability of the display panel. The external reasons of the driving chip can include electrostatic interference or structural difference of the driving chip itself. For example, Figure 1 A timing simulation schematic diagram of different signals of a driving chip provided by the related art is shown in the figure. In the figure, AVDD currut is the current timing of the analog power voltage signal, Source is the timing of the data voltage provided by the data driver, TE is the timing of the frame synchronization signal provided by the driving chip, and MIPI is the timing of the data transmission signal provided by the driving chip. As shown in the figure, Figure 1 At the moment when the data voltage changes, the current of the analog power voltage signal has a transient large current, and the peak value reaches 299.4 mA, which can easily cause damage to the pixel circuit and the gate driving circuit and signal interference, and reduce the reliability of the display panel.

[0042] In view of the above technical problems, an embodiment of the present application provides a display panel driving method for driving a display panel to display. The display panel can include a driving chip, a gate driving circuit and a pixel unit. The driving chip is connected with the gate driving circuit and the pixel unit and is used to generate an analog voltage according to an analog power voltage signal to provide a power supply for the gate driving circuit and the pixel unit. For example, Figure 2 A structural schematic diagram of a driving chip provided by an embodiment of the present application is shown in the figure. Figure 2As shown, the driving chip can include a power module 10 and a gamma module 20, the power module 10 converts the analog power voltage signal AVDD into the maximum value of the gamma voltage and outputs to the gamma module 20, so that the gamma module 20 limits the range of the data voltage according to the maximum value of the gamma voltage. Wherein, the maximum value of the gamma voltage includes the minimum gamma voltage VGSP and the maximum gamma voltage VGMP. When the driving transistor in the pixel unit is a P-type transistor, the minimum gamma voltage VGSP corresponds to the maximum brightness of the display panel, and the maximum gamma voltage VGMP corresponds to the minimum brightness of the display panel. The power module 10 can also convert the analog power voltage signal AVDD into the reference voltage VREF of the pixel unit and the power voltage of the gate drive circuit to drive the pixel unit and the gate drive circuit to work. Wherein, the power voltage of the gate drive circuit can include the positive power voltage VGH and the negative power voltage VGL. The driving chip can also include a data processing module 30 (which can include a gate driver and a data driver, etc.), for forming the start signal and the clock signal of the gate drive circuit according to the data transmission signal provided by the mainboard and the gamma value provided by the gamma module 20, and outputting to the gate drive circuit, so that the gate drive circuit generates the gate control signal according to the start signal and the clock signal, and outputs to the pixel unit. Wherein, when the gate drive circuit includes a scanning circuit and a light emitting control circuit, the start signal of the gate drive circuit includes the start signal SIN of the scanning circuit and the start signal EIN of the light emitting control circuit. The clock signal of the gate drive circuit includes the clock signal SCK (which can include at least two) of the scanning circuit and the clock signal ECK (which can include at least two) of the light emitting control circuit. Moreover, the data processing module 30 can form the data voltage data of the pixel unit, so that the pixel unit displays according to the gate control signal and the data voltage data.

[0043] The display panel driving method provided by the embodiment of the present application can be executed by the display panel driving device which can be integrated in the driving chip of the display panel. The display panel driving method comprises:

[0044] In the data writing stage, the change rate of the data signal and / or the voltage value of the analog power voltage signal are adjusted, so that the power change amount of the analog power voltage signal when the data signal changes is less than the preset power change amount;

[0045] Specifically, the change rate of the data signal is the speed of the data signal changing from the initial voltage to the target voltage. In the data writing stage, the data signal jumps from the current voltage value to the data voltage of the current frame. By increasing the time required for the data signal to jump from the current voltage value to the data voltage of the current frame, the change rate of the data signal can be reduced, thereby reducing the instantaneous impact during the change of the data voltage, and further reducing the power variation of the analog power voltage signal, so that the power variation of the analog power voltage signal is less than the preset power variation, reducing the instantaneous large current of the analog power voltage, reducing the probability of damage and signal interference of the driving circuit, and improving the reliability of the display panel. In the data writing stage, the voltage value of the analog power voltage signal can also be adjusted so that the voltage value of the analog power voltage signal is less than the preset voltage value, which can reduce the voltage value of the analog voltage inside the driving chip, and also reduce the power variation of the analog power voltage when the data signal changes, thereby reducing the instantaneous large current of the analog power voltage, reducing the probability of damage and signal interference of the driving circuit, and improving the reliability of the display panel. When the analog power voltage is provided by the power chip, the probability of replacing the power chip can be reduced, and the improvement probability of the process equipment can be reduced. When the power IC provides the analog power voltage signal, the power of the analog power voltage signal is the product of the voltage of the analog power voltage signal and the current acting on the power IC when the data signal is output. The power variation of the analog power voltage signal is the change in the power of the analog power voltage signal before and after the change when the data signal changes according to the adjusted change rate at the current voltage value. The preset power variation is the change in the power of the analog power voltage signal before and after the change when the data signal changes according to the unadjusted change rate when the voltage of the analog power voltage signal is the preset analog voltage. For example, as shown in Figure 1 , the data voltage directly jumps from the high resistance state to the data voltage of the current frame.

[0046] In the light emitting stage, the pixel unit is driven to display based on the data signal according to the first gate control signal.

[0047] Specifically, when the data signal is written into the pixel unit, the data processing module of the driving chip can form the start signal and the clock signal of the gate driving circuit according to the data transmission signal and the gamma value provided by the gamma module, and output to the gate driving circuit, so that the gate driving circuit generates the first gate control signal according to the start signal and the clock signal, and outputs to the pixel unit. The pixel unit writes the data signal into the gate of the drive transistor in the pixel unit according to the first gate control signal, so that the drive transistor can form a drive current according to the data signal to drive the light emitting device in the pixel unit to display.

[0048] The technical scheme of the embodiment adjusts the change rate of the data signal and / or the voltage value of the analog power voltage signal in the data writing stage, so that the power change amount of the analog power voltage signal when the data signal changes is less than the preset power change amount, the instantaneous large current of the analog power voltage is reduced, the probability of damage and signal interference of the driving circuit is reduced, and the reliability of the display panel is improved. When the analog power voltage is provided by the power chip, the probability of replacing the power chip can be reduced, and the improvement probability of the process equipment is also reduced.

[0049] Figure 3 A flowchart of a display panel driving method provided by the embodiment is shown in FIG. 1, and the display panel driving method includes the following steps. Figure 3

[0050] S110, adjusting the analog power voltage to a first voltage in a first data writing stage; wherein the first voltage is less than a preset voltage of the analog power voltage;

[0051] The analog power voltage can be the voltage provided by the power chip or the mainboard to the driving chip of the display panel, and is used to provide the analog power for the power module of the driving chip. The data writing stage can be divided into continuous first data writing stage and second data writing stage, and at least part of the first data writing stage is located before the second data writing stage. In the first data writing stage, the power module of the driving chip is in action, so that the power module can form the first voltage according to the analog power voltage, the first voltage is less than the preset voltage of the analog power voltage, and the voltage value of the analog voltage inside the driving chip can be reduced. For example, the first voltage can be the highest gamma voltage of the gamma module. The highest gamma voltage is less than the analog power voltage, so that the analog voltage value inside the driving chip is reduced.

[0052] S120, writing the data signal into the pixel unit in the second data writing stage; wherein the data signal is the data voltage of the current frame, and the starting time of the first data writing stage is at least not delayed from the starting time of the second data writing stage;

[0053] ​Wherein, after the analog power voltage is regulated to the first voltage, the analog voltage in the driving chip is reduced. In the second data writing stage, the data processing module of the driving chip forms the data voltage of the current frame according to the data transmission signal and outputs to the pixel unit, so that the pixel unit can display the picture of the current frame according to the data voltage of the current frame. Since the analog voltage is reduced before the data processing module forms the data signal according to the data transmission signal, the power change acting on the analog power voltage when the data signal changes can be reduced, and the instantaneous large current of the analog power voltage can be reduced, thereby reducing the probability of damage and signal interference of the driving circuit and improving the reliability of the display panel. When the analog power voltage is provided by the power chip, the probability of replacing the power chip can be reduced, and the improvement probability of the process equipment is also reduced.

[0054] Exemplary, Figure 4 A timing simulation schematic diagram of different signals of a driving chip provided by an embodiment of the present application is provided. Wherein, AVDD currut is the current timing of the analog power voltage signal, Source is the timing of the data signal provided by the data driver, AVDD is the timing of the analog power voltage signal, and MIPI is the timing of the data transmission signal provided by the driving chip. As shown in Figure 4 the first data writing stage, the analog power voltage jumps to the first voltage, and then the data driver provides the data signal of the current frame, so that the peak value of the current of the analog power voltage signal at the moment of data voltage change is reduced from 299.4mA to 153.1mA, thereby reducing the instantaneous large current of the analog power voltage signal, reducing the probability of damage and signal interference of the driving circuit, and improving the reliability of the display panel. Figure 5 A circuit schematic diagram of a pixel unit provided by an embodiment of the present application is provided. As shown in Figure 5As shown, the pixel unit includes 8T1C, the first transistor T1 is a driving transistor, the fourth transistor T4, the seventh transistor T7 and the eighth transistor T8 are initialization transistors, the pixel unit includes an initialization stage, in the initialization stage, the first N-type scan signal SN1 output by the scan circuit is high, the fourth transistor T4 is turned on, the second P-type scan signal SP2 output by the scan circuit is low, the seventh transistor T7 and the eighth transistor T8 are turned on, and different initialization signals are used to initialize the gate of the driving transistor T1, the anode A of the light emitting device and the source S of the driving transistor T1 through the fourth transistor T4, the seventh transistor T7 and the eighth transistor T8 respectively. The second data writing stage can include a data writing stage of the pixel unit. In the data writing stage, the first P-type scan signal SP1 output by the scan circuit is low, and the second transistor T2 can be controlled to be turned on. At the same time, the second N-type scan signal SN2 output by the scan circuit is high, and the third transistor T3 is turned on. The data signal is written into the gate of the driving transistor T1 through the second transistor T2, the driving transistor T1 and the third transistor T3, and maintained through the storage capacitor Cst.

[0055] In the light emitting stage, the pixel unit is driven to display according to the data signal based on the first gate control signal.

[0056] In the data signal is written into the pixel unit, the data processing module of the driving chip can form a start signal and a clock signal of the gate driving circuit according to the data transmission signal and the gamma value provided by the gamma module, and output to the gate driving circuit, so that the gate driving circuit generates the first gate control signal according to the start signal and the clock signal, and outputs to the pixel unit. The pixel unit writes the data signal into the gate of the driving transistor in the pixel unit according to the first gate control signal, so that the driving transistor can form a driving current according to the data signal, and drive the light emitting device in the pixel unit to display. Continue to refer to Figure 5 The light emitting stage can include a light emitting stage of the pixel unit. The first gate control signal can include a light emitting control signal EM. In the light emitting stage, the light emitting control signal EM output by the light emitting control circuit is low, the fifth transistor T5 and the sixth transistor T6 are turned on, the driving transistor T1 forms a driving current according to the data signal of the gate and the first power signal ELVDD, and the light emitting device drives the light emitting device to emit light according to the current data signal. Wherein, the cathode of the light emitting device inputs the second power signal ELVSS.

[0057] The technical scheme of the embodiment adjusts the analog power supply voltage to the first voltage before the second data writing stage, so that the analog voltage in the driving chip is reduced. When the data signal changes, the power change acting on the analog power supply voltage can be reduced, and the transient large current of the analog power supply voltage signal can be reduced, thereby reducing the probability of damage and signal interference of the driving circuit and improving the reliability of the display panel. When the analog power supply voltage is provided by the power supply chip, the probability of replacing the power supply chip can be reduced, and the improvement probability of the process equipment can be reduced.

[0058] In some embodiments, before the second data writing stage, further comprising:

[0059] The control data signal is in a high impedance state.

[0060] Specifically, before the second data writing stage, the data signal can be in a high impedance state, avoiding the transmission of the data signal to the pixel unit, so that the change of the data signal before the analog power supply voltage is adjusted to the first voltage can be avoided, and the transient large current of the analog power supply voltage is ensured to be reduced, further improving the reliability of the display panel. For example, Figure 4 Before the second data writing stage, the data signal Source is in a high impedance state, and the output level is a low-level signal.

[0061] In some embodiments, the difference between the first voltage and the preset voltage is in the range of 0.3V-0.5V, so that when the analog voltage is converted to other voltages, the voltage value of the other voltages can meet the requirements of the pixel unit and the gate driving circuit. For example, the other voltages can include the reference voltage of the pixel unit, and can also include the power supply voltage of the gate driving circuit.

[0062] In some embodiments, writing the data signal to the pixel unit comprises:

[0063] The data signal is charged to the data voltage of the current frame multiple times and written to the pixel unit; the voltage after each charging is greater than the voltage after the last charging.

[0064] Specifically, before the data signal changes, the data signal can be in a high-impedance state. After the data signal changes, the data signal changes according to the data transmission signal to a data voltage of a current frame. Then, the voltage of the data signal changes to the data voltage of the current frame minus a low voltage corresponding to the high-impedance state. During the voltage change of the data signal, the data signal can be charged multiple times from the high-impedance state to the data voltage of the current frame, and the voltage after each charging is greater than the voltage after the previous charging, so that the voltage of the data signal gradually changes to the data voltage of the current frame, thereby reducing the instantaneous impact during the data voltage change, and further reducing the instantaneous large current of the analog power voltage, reducing the probability of damage to the driving circuit and signal interference, and improving the reliability of the display panel.

[0065] In some embodiments, charging the data signal to the data voltage of the current frame multiple times includes:

[0066] charging the data signal to the data voltage of the current frame in steps.

[0067] Specifically, the charging mode of the data signal can be step charging, so that the data signal can be stepped from the high-impedance state to the data voltage of the current frame. Compared with directly jumping from the low voltage of the high-impedance state to the data voltage of the current frame, the change rate of the data voltage can be reduced, thereby reducing the instantaneous impact during the data voltage jump, and further reducing the instantaneous large current of the analog power voltage. For example, Figure 6 Another timing simulation schematic diagram of different signals provided by the driving chip is provided for the embodiments of the present application. In the diagram, AVDD currut is the current timing of the analog power voltage signal, Source is the timing of the data signal provided by the data driver, TE is the timing of the frame synchronization signal provided by the driving chip, and MIPI is the timing of the data transmission signal provided by the driving chip. As shown in the diagram, Figure 6 During the jump of the data signal, the data signal jumps from the low voltage of the high-impedance state to the data voltage of the current frame in three steps, thereby reducing the instantaneous large current of the analog power voltage signal, reducing the probability of damage to the driving circuit and signal interference, and improving the reliability of the display panel.

[0068] In some embodiments, writing the data signal to the pixel unit includes:

[0069] transmitting the data signal to a data input end of the pixel unit;

[0070] Specifically, with continued reference to Figure 5The data input end of the pixel unit is the first electrode of the second transistor T2. In the second data writing stage, the data processing module of the driving chip can form a data signal according to a data transmission signal and transmit the data signal to the first electrode of the second transistor T2. At this time, the second transistor T2 is in a cut-off state, and the data signal cannot be transmitted to the gate of the driving transistor T1.

[0071] The second gate control signal is controlled to be effective, so that the data signal is transmitted to the gate of the driving transistor of the pixel unit through the data input end. The effective level of the second gate control signal is ahead of the effective level of the first gate control signal.

[0072] Specifically, the second gate control signal can include a first P-type scan signal SP1 and a second N-type scan signal SN2. The effective level of the first P-type scan signal SP1 is low, and the effective level of the second N-type scan signal SN2 is high. After the data signal is transmitted to the first electrode of the second transistor T2, the gate drive circuit controls the first P-type scan signal SP1 to be low and the second N-type scan signal SN2 to be high, so that the second transistor T2 and the third transistor T3 are turned on, so that the data signal can be written to the gate of the driving transistor T1 through the second transistor T2, the driving transistor T1 and the third transistor T3, and the writing of the data signal is realized. Thus, writing the data signal to the pixel unit can be divided into a first process of writing the data signal to the data input end of the pixel unit and a second process of writing the data signal from the data input end to the gate of the driving transistor, reducing the instantaneous nature of the data signal change, thereby reducing the instantaneous large current of the analog power supply voltage, reducing the probability of damage and signal interference of the driving circuit, and improving the reliability of the display panel. When the analog power supply voltage is provided by the power supply chip, the probability of replacing the power supply chip can be reduced, and the improvement probability of the process equipment can be reduced. Exemplarily, Figure 7 Another timing simulation schematic diagram of different signals of the driving chip provided by the embodiment of the present application is provided. Among them, AVDD currut is the current timing of the analog power supply voltage signal, Source is the timing of the data signal provided by the data driver, TE is the timing of the frame synchronization signal provided by the driving chip, which is used to represent the second gate control signal. MIPI is the timing of the data transmission signal provided by the driving chip. As shown in Figure 7 The data signal is ahead of the change of the frame synchronization signal, so that the data signal can be written to the data input end of the pixel unit first, and then the frame synchronization signal changes, the second gate control signal is controlled to be effective, so that the data signal is written to the gate of the driving transistor, thereby reducing the instantaneous large current of the analog power supply voltage, reducing the probability of damage and signal interference of the driving circuit, and improving the reliability of the display panel.

[0073] In addition, the active level of the second gate control signal is ahead of the active level of the first gate control signal, so that the data signal is written into the gate of the driving transistor T1 first, and then the driving transistor T1 forms a driving current according to the data signal, and the light emitting device emits light according to the data signal of the current frame, which can ensure the normal operation of the pixel unit.

[0074] In some embodiments, the variation rate of the data signal and / or the voltage value of the analog power voltage signal are adjusted so that the power variation amount of the analog power voltage signal when the data signal varies is less than a preset power variation amount, including:

[0075] The data signal is charged to the pixel unit multiple times, and the voltage after each charging is greater than the voltage after the previous charging.

[0076] Specifically, in the data writing stage, the data signal can be charged to the pixel unit multiple times, and the voltage after each charging is greater than the voltage after the previous charging, so that the voltage of the data signal gradually changes to the data voltage of the current frame, thereby reducing the instantaneous impact in the data voltage variation process, and further reducing the instantaneous large current of the analog power voltage, reducing the damage of the driving circuit and the probability of signal interference, and improving the reliability of the display panel.

[0077] Preferably, the data signal is charged to the pixel unit multiple times, including:

[0078] The data signal is charged to the pixel unit in steps.

[0079] In some embodiments, the pixel unit includes a pixel circuit and a light emitting unit; and the pixel unit is driven to display based on the data signal according to the first gate control signal, including:

[0080] In the light emitting stage, the first gate control signal is controlled to be active, so that the pixel circuit forms a driving current according to the data signal, and drives the light emitting unit to display.

[0081] Specifically, when the first gate control signal is active, the pixel circuit can form a driving current according to the data signal. For example, continuing to refer to Figure 5 , the first gate control signal can include a light emitting control signal EM. When the fifth transistor T5 and the sixth transistor T6 are P-type transistors, the light emitting control signal EM is active at a low level. In the light emitting stage, the light emitting control signal EM output by the light emitting control circuit is at a low level, the fifth transistor T5 and the sixth transistor T6 are turned on, the driving transistor T1 forms a driving current according to the data signal and the first power signal ELVDD, and the light emitting device emits light according to the current data signal.

[0082] The embodiment of the present application also provides a driving device of a display panel, used for driving the display panel. The display panel includes a pixel unit. Figure 8A structural schematic diagram of a driving device of a display panel is provided for an embodiment of the present application. As shown in the figure, the driving device comprises: Figure 8

[0083] an adjusting module 100, configured to, in a data writing stage, adjust a power variation amount of an analog power voltage signal when a data signal varies to be less than a preset power variation amount according to a variation rate of the data signal and / or a voltage value of the analog power voltage signal;

[0084] a driving module 200, configured to, in a light emitting stage, drive the pixel unit to display based on the data signal according to a first gate control signal.

[0085] The technical scheme of the embodiment adjusts the variation rate of the data signal and / or the voltage value of the analog power voltage signal in the data writing stage, so that the power variation amount of the analog power voltage signal when the data signal varies is less than the preset power variation amount, thereby reducing the instantaneous large current of the analog power voltage, reducing the probability of damage and signal interference of the driving circuit, and improving the reliability of the display panel. When the analog power voltage is provided by a power chip, the probability of replacing the power chip can be reduced, and the improvement probability of the process equipment is also reduced.

[0086] Optionally, the adjusting module comprises:

[0087] a first adjusting unit, configured to, in a first data writing stage, adjust the analog power voltage to a first voltage; wherein the first voltage is less than a preset voltage of the analog power voltage;

[0088] a second adjusting unit, configured to, in a second data writing stage, write the data signal into the pixel unit; wherein the data signal is a data voltage of a current frame, and a starting time of the first data writing stage is at least not delayed from a starting time of the second data writing stage.

[0089] Optionally, the driving device of the display panel further comprises:

[0090] a control module, configured to control the data signal to be in a high resistance state.

[0091] Optionally, a difference range between the first voltage and the preset voltage is 0.3V-0.5V.

[0092] Optionally, the second adjusting unit is configured to charge the data signal to the data voltage of the current frame multiple times and write into the pixel unit; a voltage after each charging is greater than a voltage after the last charging.

[0093] Preferably, the second adjusting unit is configured to charge the data signal to the data voltage of the current frame in steps.

[0094] Optionally, the second adjusting unit comprises:

[0095] ​The transmission unit is used to transmit data signals to the data input terminal of the pixel unit;

[0096] The control unit is used to control the second gate control signal to be valid, so that the data signal is transmitted to the gate of the driving transistor of the pixel unit through the data input terminal, and the effective level of the second gate control signal leads the effective level of the first gate control signal.

[0097] In some embodiments, the adjustment module is used to charge the pixel unit with the data signal multiple times; the voltage after each charge is greater than the voltage after the previous charge.

[0098] Preferably, the adjustment module is used to charge the data signal to the pixel unit in a stepped manner.

[0099] This invention also provides a display device. Figure 9 This is a schematic diagram of a display device provided in an embodiment of the present invention. Figure 9 As shown, the display device includes a display panel 101 and a driving device 102 for the display panel provided in any embodiment of the present invention. The display panel 101 is connected to the driving device 102 for the display panel, and the driving device 102 is used to drive the display panel 101 to display. Since the display device includes the driving device 102 for the display panel provided in any embodiment of the present invention, it has the same beneficial effects as the driving device 102 for the display panel provided in any embodiment of the present invention, and will not be described again here. The display device can be, for example, any product or component with display function such as a mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, smart wearable device, or information kiosks in public lobbies.

[0100] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A driving method for a display panel, characterized in that, The display panel includes a driver chip, a gate driving circuit, and pixel units. The driver chip is connected to the gate driving circuit and the pixel units and is used to generate an analog voltage based on the input analog power supply voltage signal to power the gate driving circuit and the pixel units. The driver chip includes a power module, a gamma module, and a data processing module. The analog power supply voltage signal is used to provide analog power to the power module, and the data processing module is used to provide data voltage to the pixel units. The driving method for the display panel includes: During the data writing phase, the voltage value of the analog power supply voltage signal is adjusted so that the power change of the analog power supply voltage signal is less than the preset power change when the data signal changes. During the light-emitting phase, the pixel unit is driven to display based on the data signal according to the first gate control signal; During the data writing phase, the voltage value of the analog power supply voltage signal is adjusted so that the power change of the analog power supply voltage signal is less than a preset power change when the data signal changes. This includes: During the first data writing phase, the analog power supply voltage is adjusted to a first voltage; wherein the first voltage is less than a preset voltage of the analog power supply voltage; the difference between the first voltage and the preset voltage is in the range of 0.3V-0.5V. In the second data writing stage, a data signal is written to the pixel unit; wherein the data signal is the data voltage of the current frame, and the start time of the first data writing stage is at least not later than the start time of the second data writing stage.

2. The driving method for the display panel according to claim 1, characterized in that, Prior to the second data writing stage, the following is also included: The data signal is controlled to be in a high-impedance state.

3. The driving method for the display panel according to claim 1, characterized in that, Writing data signals into pixel units includes: The data signal is charged multiple times to the data voltage of the current frame and written to the pixel unit; the voltage after each charging is greater than the voltage after the previous charging.

4. The driving method for the display panel according to claim 3, characterized in that, Charging the data signal multiple times to the data voltage of the current frame includes: The data signal is charged in a stepwise manner to the data voltage of the current frame.

5. The driving method for a display panel according to any one of claims 1-4, characterized in that, After writing the data signal to the pixel unit, the process includes: The data signal is transmitted to the data input terminal of the pixel unit; The second gate control signal is enabled, so that the data signal is transmitted to the gate of the driving transistor of the pixel unit through the data input terminal, and the effective level of the second gate control signal leads the effective level of the first gate control signal.

6. The driving method for a display panel according to claim 1, characterized in that, The pixel unit includes a pixel circuit and a light-emitting unit; Drive the pixel unit to display based on the data signal according to the first gate control signal, including: During the light-emitting stage, the first gate control signal is made valid, causing the pixel circuit to generate a driving current based on the data signal, thereby driving the light-emitting unit to display.

7. A driving device for a display panel, characterized in that, The display panel includes a driver chip, a gate driving circuit, and pixel units. The driver chip is connected to the gate driving circuit and the pixel units and is used to generate an analog voltage based on the input analog power supply voltage signal to power the gate driving circuit and the pixel units. The driver chip includes a power module, a gamma module, and a data processing module. The analog power supply voltage signal is used to provide analog power to the power module, and the data processing module is used to provide data voltage to the pixel units. The driving device for the display panel includes: The adjustment module is used to adjust the voltage value of the analog power supply voltage signal during the data writing stage so that the power change of the analog power supply voltage signal is less than the preset power change when the data signal changes. A driving module is used to drive the pixel unit to display based on the data signal according to the first gate control signal during the light-emitting stage; The adjustment module includes: A first adjustment unit is used to adjust the analog power supply voltage to a first voltage during the first data writing stage; wherein the first voltage is less than a preset voltage of the analog power supply voltage; and the difference between the first voltage and the preset voltage is in the range of 0.3V-0.5V. The second adjustment unit is used to write a data signal into the pixel unit during the second data writing phase; wherein the data signal is the data voltage of the current frame, and the start time of the first data writing phase is at least not delayed from the start time of the second data writing phase.

8. A display device, characterized in that, It includes a display panel and a driving device for the display panel as described in claim 7; the display panel is connected to the driving device for the display panel, and the driving device for the display panel is used to drive the display panel to display.

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