Display driving integrated circuit, display module, electronic equipment and driving method thereof

Abstract

The embodiment of the invention provides a display driving integrated circuit, a display module, electronic equipment and a driving method thereof, relates to the technical field of electronics, and is used for improving the stability of the display effect of the electronic equipment. According to the invention, for a single OLED panel or a tan OLED panel, different driving schemes are used in different scenes, so that the display effect in different scenes can be optimal. For example, by means of changing the pulse width of the light-emitting control initial signal, changing the frequency of the anode reset initial signal and the like, the display effects of the display panel in different scenes are all optimal, so that the stability of the display effect of the electronic equipment is improved.

Description

Technical Field

[0001] This application relates to the field of electronic technologies, and in particular, to a display driving integrated circuit, a display module, an electronic device, and a driving method thereof. Background Art

[0002] Self-emitting display panels such as organic light emitting diode (OLED) display panels have been widely used in the display field due to their advantages of being thin, light, wide viewing angle, active emission, continuously adjustable emission color, low cost, high color gamut, high contrast ratio, fast response speed, low power consumption, low driving voltage, wide operating temperature range, simple production process, high luminous efficiency, and flexible display.

[0003] With the improvement of the performance of electronic devices, in order to balance the power consumption and effect of electronic devices, when using an electronic device, there are usually state changes such as brightness switching and refresh rate switching for different usage states. However, in current electronic devices, the display effect during state changes still needs to be improved. Summary of the Invention

[0004] This application provides a display driving integrated circuit, a display module, an electronic device, and a driving method thereof, which are used to improve the stability of the display effect of an electronic device.

[0005] In a first aspect of an embodiment of this application, a display driving integrated circuit is provided. The display driving integrated circuit is used to drive a display panel. The display driving integrated circuit is further used to: receive a first instruction and output a first anode reset start signal and a first light emission control start signal to the display panel; in one image frame, the first anode reset start signal includes N first anode reset pulses, and the first light emission control start signal includes M*N first light emission control pulses. After each first anode reset pulse, there are M first light emission control pulses corresponding to it. The first instruction can control the display panel to enter a first display scenario, for example. Among the M first light emission control pulses, the widths of the first W first light emission control pulses are less than the widths of the remaining M - W first light emission control pulses; N and W are integers greater than or equal to 1, M is an integer greater than 1, and W < M. Receive a second instruction and output a second anode reset start signal and a second light emission control start signal to the display panel; in one image frame, the second anode reset start signal includes O second anode reset pulses, and the second light emission control start signal includes P*O second light emission control pulses. After each second anode reset pulse, there are P second light emission control pulses corresponding to it; among the P second light emission control pulses, the widths of the first Q second light emission control pulses are greater than the widths of the remaining P - Q second light emission control pulses. The second instruction can control the display panel to enter a second display scenario, for example. O and Q are integers greater than or equal to 1, P is an integer greater than 1, and Q < P.

[0006] The display driver integrated circuit provided in the embodiment of the present application can reduce the width of the first W first light control pulses after the anode reset of each repeating unit (M first light control pulses) in the first light control start signal based on the first instruction, and can reduce the luminous brightness corresponding to the first W first light control pulses. Originally, due to the influence of the anode reset, the luminous brightness under the first W first light control pulses is weaker than the luminous brightness under the remaining first light control pulses. After reducing the width of the first W first light control pulses, the luminous brightness under the first W first light control pulses will be further reduced, and the luminous brightness under the first W first light control pulses can be almost ignored. The luminous waveform under each repeating unit is changed from multiple peaks (for example, double peaks) to a single peak, and a unified actual luminous waveform is achieved. That is, the consistency of the luminous brightness is relatively high, and the brightness jump caused by the grayscale change is significantly weakened, which helps to improve the smear problem. Based on the second instruction, the width of the first Q (for example, the first) second light control pulses after the anode reset of each repeating unit (P second light control pulses) in the second light control start signal is increased, and the luminous brightness corresponding to the first Q second light control pulses can be increased. Originally, affected by the anode reset, the luminous brightness under the first Q second luminous control pulses is weaker than the luminous brightness under the remaining second luminous control pulses. After increasing the width of the first Q second luminous control pulses, the luminous brightness under the first Q second luminous control pulses will be increased. The luminous waveform under each pulse is made approximately the same, and the change in luminous brightness caused by pulse switching is significantly weakened, achieving a more uniform actual luminous waveform. That is, the luminous brightness is always relatively uniform, which helps to improve the flicker problem. Based on this, the display driver integrated circuit provided in the embodiment of the present application outputs luminous control start signals with different timings based on different instructions, which can improve the smear problem under the first display scene corresponding to the first instruction and the flicker problem under the second display scene corresponding to the second instruction, so that different display scenes have better display effects.

[0007] In a possible implementation, the display driver integrated circuit is further used to: after receiving the first instruction, before outputting the first light control start signal to the display panel, output a third light control start signal to the display panel. That is, in the process of display scene change, a transition frame is added. In an image frame of the transition frame, the third light control start signal includes a plurality of third light control pulses of equal width. By setting the third light control start signal with a fixed pulse width, the instantaneous brightness of the transition frame is adjusted so that the average brightness of the transition frame can be between the light brightness in the first display scene and the light brightness in the second display scene, thereby reducing the brightness difference when the first display scene and the second display scene are switched, which helps to achieve a seamless switching from the second display scene to the first display scene.

[0008] In a possible implementation, the display driver integrated circuit is further used to: after receiving the second instruction, before outputting the first light control start signal to the display panel, output a third light control start signal to the display panel. That is, in the process of display scene change, a transition frame is added. In an image frame of the transition frame, the third light control start signal includes a plurality of third light control pulses of equal width. By setting the third light control start signal with a fixed pulse width, the instantaneous brightness under the transition frame is adjusted so that the average brightness of the transition frame can be between the light brightness under the first display scene and the light brightness under the second display scene, thereby reducing the brightness difference when the first display scene and the second display scene are switched, which helps to achieve a seamless switching from the first display scene to the second display scene.

[0009] In a possible implementation, the display driver integrated circuit is further used to: in a transition frame, when the third light emitting control start signal is output to the display panel, output a first compensation data voltage to the display panel. By compensating the data voltage of the transition frame, the uniformity of the average brightness between the transition frame and the first display scene and the second display scene can be further improved, and the seamless switching between the first display scene and the second display scene can be further achieved.

[0010] In a possible implementation, the display driver integrated circuit is further used to: in a transition frame, when the third light emitting control start signal is output to the display panel, output a compensation initialization voltage to the display panel. By compensating the initialization voltage of the transition frame, the uniformity of the average brightness between the transition frame and the first display scene and the second display scene can be further improved, and the seamless switching between the first display scene and the second display scene can be further achieved.

[0011] In a possible implementation, the display driver integrated circuit is further used to: in the first display scene, when the first light emission control start signal is output to the display panel, output a second compensation data voltage to the display panel. By compensating the data voltage of the display panel, the brightness consistency in the first display scene can be further improved, and the problem of display smear can be improved.

[0012] In one possible implementation, the first instruction includes a picture refresh instruction, which is used to drive the display panel to enter the dynamic image frame mode and switch the display interface; the second instruction includes a self-refresh instruction, which is used to drive the display panel to enter the static image frame mode without switching the display interface. Since the display interface is constantly changing in the dynamic image frame mode, there will be a situation where the low grayscale jumps to the high grayscale, resulting in a serious ghosting problem in the dynamic image frame mode. Since in the static image frame mode, although the display interface does not change, the luminous brightness is constantly switching, resulting in a serious flickering problem in the static image frame mode. The embodiment of the present application drives the display panel in the dynamic image frame mode using the first luminous control start signal to make the luminous brightness of the display panel in the dynamic image frame mode uniform, which helps to improve the ghosting problem in the dynamic image frame mode. By driving the display panel in the static image frame mode using the second luminous control start signal to make the luminous brightness of the display panel in the static image frame mode uniform, it helps to improve the flickering problem in the static image frame mode.

[0013] In a possible implementation, the display driver integrated circuit receives a first instruction to enter a first mode, and receives a second instruction to enter a second mode; the first mode includes a dark mode, and the second mode includes a light mode; the dark mode represents a display mode in which the background of the display panel is dark and the text is light, and the light mode represents a display mode in which the background of the display panel is light and the text is dark. Since in the dark mode, the brightness jump is obvious when the low gray scale changes to the high gray scale, the problem of ghosting is serious in the dark mode. Since in the light mode, the luminous brightness is constantly switching, the problem of flickering in the light mode is serious. In the embodiment of the present application, by using the first luminous control start signal to drive the display panel in the dark mode, the luminous brightness of the display panel in the dark mode is uniform, which helps to improve the problem of ghosting in the dark mode. By using the second luminous control start signal to drive the display panel in the light mode, the luminous brightness of the display panel in the light mode is uniform, which helps to improve the problem of flickering in the light mode.

[0014] In a possible implementation, the first instruction includes a dark mode activation instruction, and the second instruction includes a light mode activation instruction. The electronic device can directly distinguish the first instruction from the second instruction based on the user's operation, with high accuracy.

[0015] In a possible implementation, the display panel includes an array substrate and a plurality of light-emitting devices disposed on the array substrate; the light-emitting devices include a first electrode layer, a light-emitting layer, and a second electrode layer sequentially disposed on the array substrate. The display driver integrated circuit provided in the embodiment of the present application has a better driving effect on a display panel including a single light-emitting layer.

[0016] In a second aspect of the embodiments of the present application, a display module is provided, the display module includes a display driver integrated circuit and a display panel, the display driver integrated circuit is coupled to the display panel; the display driver integrated circuit includes any one of the display driver integrated circuits of the first aspect. The display module provided by the embodiments of the present application includes the above-mentioned display driver integrated circuit, and the beneficial effects of the display module are the same as the beneficial effects of the display driver integrated circuit, which will not be repeated here.

[0017] According to a third aspect of an embodiment of the present application, an electronic device is provided. The electronic device includes a driving controller and a display module. The display module is coupled to the driving controller. The display module includes the display module of the second aspect.

[0018] The electronic device provided in the embodiment of the present application includes the above-mentioned display driver integrated circuit. The beneficial effects of the electronic device are the same as the beneficial effects of the display driver integrated circuit, which will not be repeated here.

[0019] In a possible implementation, the first instruction includes a refresh instruction, the display panel receives a first light-emitting control start signal, and switches from the first display interface to the second display interface; the second instruction includes a self-refresh instruction, the display panel receives a second light-emitting control start signal, and maintains a third display interface. Based on the display driver integrated circuit provided by the present application, the problem of ghosting when switching from the first display interface to the second display interface can be improved, and the problem of flickering when the third display screen is continuously displayed can be improved.

[0020] In a possible implementation, the first instruction includes a dark mode start instruction, the display panel receives a first light control start signal, and the display interface enters the dark mode; the second instruction includes a light mode start instruction, the display panel receives a second light control start signal, and the display interface enters the light mode. Based on the display driver integrated circuit provided in the present application, the problem of ghosting in the dark mode and the problem of flickering in the light mode can be improved.

[0021] In a fourth aspect of the embodiments of the present application, a display driver integrated circuit is provided, which is used to drive a display panel; the display driver integrated circuit is also used to: receive a first brightness instruction representing a first light-emitting brightness, and output a first reset start signal and a first light-emitting control start signal to the display panel. Receive a second brightness instruction representing a second light-emitting brightness, and output a second reset start signal and a second light-emitting control start signal to the display panel. The first light-emitting brightness is less than a set brightness, and the second light-emitting brightness is greater than or equal to the set brightness; f1 is the frequency of the first reset start signal, f2 is the frequency of the second reset start signal, f3 is the frequency of the first light-emitting control start signal, and f4 is the frequency of the second light-emitting control start signal; f1 <f2,f3≦f4,f1≦f3,f2≦f4。

[0022] Since the frequency of the reset start signal is greater, the charging current required by the display panel is greater. In low-brightness scenarios, when the grayscale switches from a low grayscale to a high grayscale, the instantaneous capacitor charging current is greater, which can cause the average brightness to be too bright at the moment of switching, thereby causing the display panel to have ghosting. However, in high-brightness scenarios, the ghosting problem can be ignored. The embodiment of the present application can reduce the charging current required for the display panel by reducing the number of resets of the anode of the light-emitting device in low-brightness scenarios, so as to reduce the transient over-brightness problem introduced by the charging current in low-brightness scenarios. In this way, in low-brightness scenarios, when the grayscale switches from a low grayscale to a high grayscale, the problem of excessive brightness of the light-emitting brightness at the moment of switching is improved, thereby improving the ghosting problem of the display panel to achieve ghost-free display in low-brightness scenarios.

[0023] In a possible implementation, f2=n*360HZ, where n is a positive integer. By setting the base frequency in a high-brightness scene to an integer multiple of 360HZ, flicker-free switching between 90HZ and 120HZ in a high-brightness scene can be achieved, so that the best display effect can be achieved even in high brightness.

[0024] In a possible implementation, the display panel includes an array substrate and a plurality of light-emitting devices disposed on the array substrate; the light-emitting devices include a first electrode layer, a first light-emitting layer, a conductive connection layer, a second light-emitting layer, and a second electrode layer sequentially disposed on the array substrate. The display driver integrated circuit provided in the embodiment of the present application has a better driving effect on a display panel including multiple light-emitting layers.

[0025] In a fifth aspect of the embodiments of the present application, a display module is provided, the display module includes a display driver integrated circuit and a display panel, the display driver integrated circuit is coupled to the display panel; the display driver integrated circuit includes any one of the display driver integrated circuits of the fourth aspect. The display module provided by the embodiments of the present application includes the above-mentioned display driver integrated circuit, and the beneficial effects of the display module are the same as the beneficial effects of the display driver integrated circuit, which will not be repeated here.

[0026] According to a sixth aspect of an embodiment of the present application, an electronic device is provided. The electronic device includes a driving controller and a display module, wherein the display module is coupled to the driving controller; the display module includes the display module of the fifth aspect.

[0027] In a seventh aspect of the embodiments of the present application, a driving method for an electronic device is provided. The electronic device includes a driving controller, a display driving integrated circuit, and a display panel. The driving method includes: the driving controller sends a first instruction; the display driving integrated circuit receives the first instruction and outputs a first anode reset start signal and a first light emission control start signal to the display panel; in an image frame, the first anode reset start signal includes N first anode reset pulses, and the first light emission control start signal includes M*N first light emission control pulses. After each first anode reset pulse, there are M first light emission control pulses corresponding thereto; among the M first light emission control pulses, the widths of the first W first light emission control pulses are smaller than the widths of the remaining M-W first light emission control pulses; N and W are integers greater than or equal to 1, M is an integer greater than 1, and W<M. The driving controller sends and receives a second instruction; the display driving integrated circuit receives the second instruction and outputs a second anode reset start signal and a second light emission control start signal to the display panel; in an image frame, the second anode reset start signal includes O second anode reset pulses, and the second light emission control start signal includes P*O second light emission control pulses. After each second anode reset pulse, there are P second light emission control pulses corresponding thereto; among the P second light emission control pulses, the widths of the first Q second light emission control pulses are greater than the widths of the remaining P-Q second light emission control pulses; O and Q are integers greater than or equal to 1, P is an integer greater than 1, and Q<P. The beneficial effects of the driving method of the electronic device are the same as those of the display driving integrated circuit in the first aspect, and will not be elaborated here.

[0028] In a possible implementation manner, the driving method further includes: after the display driving integrated circuit receives the first instruction and before outputting the first light emission control start signal to the display panel, the display driving integrated circuit outputs a third light emission control start signal to the display panel; in an image frame, the third light emission control start signal includes a plurality of third light emission control pulses with equal widths.

[0029] In a possible implementation manner, the driving method further includes: after the display driving integrated circuit receives the second instruction and before outputting the first light emission control start signal to the display panel, the display driving integrated circuit outputs a third light emission control start signal to the display panel; in an image frame, the third light emission control start signal includes a plurality of third light emission control pulses with equal widths.

[0030] In a possible implementation manner, the driving method further includes: when the display driving integrated circuit outputs the third light emission control start signal to the display panel, the display driving integrated circuit outputs a first compensation data voltage to the display panel.

[0031] In a possible implementation, the driving method further includes: when the display driving integrated circuit outputs a third light-emitting control start signal to the display panel, the display driving integrated circuit outputs a compensation initialization voltage to the display panel.

[0032] In a possible implementation, the driving method further includes: when the display driving integrated circuit outputs a first light-emitting control start signal to the display panel, the display driving integrated circuit outputs a second compensation data voltage to the display panel.

[0033] In an eighth aspect of the embodiments of the present application, a driving method for an electronic device is provided. The electronic device includes a driving controller, a display driving integrated circuit, and a display panel. The driving method includes: the driving controller sends a first brightness instruction representing a first light-emitting brightness, and the display driving integrated circuit outputs a first reset start signal and a first light-emitting control start signal to the display panel according to the first brightness instruction. The driving controller sends a second brightness instruction representing a second light-emitting brightness, and the display driving integrated circuit outputs a second reset start signal and a second light-emitting control start signal to the display panel according to the second brightness instruction. Wherein, the first light-emitting brightness is less than a set brightness, and the second light-emitting brightness is greater than or equal to the set brightness; f1 is the frequency of the first reset start signal, f2 is the frequency of the second reset start signal, f3 is the frequency of the first light-emitting control start signal, and f4 is the frequency of the second light-emitting control start signal; f1 < f2, f3 ≤ f4, f1 ≤ f3, f2 ≤ f4. The beneficial effects of the driving method of the electronic device are the same as those of the display driving integrated circuit in the fourth aspect, and will not be elaborated here.

[0034] In a possible implementation, f2 = n * 360HZ, where n is a positive integer. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic structural diagram of an electronic device provided by an embodiment of the present application;

[0036] Figure 2A It is a schematic topological structure diagram of a pixel circuit provided by an embodiment of the present application;

[0037] Figure 2B It is a schematic structural diagram of a display panel provided by an embodiment of the present application;

[0038] Figure 2C It is a schematic structural diagram of another display panel provided by an embodiment of the present application;

[0039] Figure 2D It is a schematic structural diagram of a light-emitting control signal generation circuit provided by an embodiment of the present application;

[0040] Figure 2EA driving timing diagram of a pixel circuit provided in an embodiment of the present application;

[0041] Figure 3A A brightness variation diagram corresponding to the timing of a light emitting control start signal provided in an embodiment of the present application;

[0042] Figure 3B A light emitting waveform diagram provided in an embodiment of the present application;

[0043] Figure 4A A timing diagram of a light emission control start signal provided in an embodiment of the present application;

[0044] Figure 4B Another light emitting waveform diagram provided in an embodiment of the present application;

[0045] Figure 4C Another light emitting waveform diagram provided in an embodiment of the present application;

[0046] Figure 5 A driving timing diagram of a display panel provided in an embodiment of the present application;

[0047] Fig. 6A A light emitting waveform diagram under a first display scenario provided in an embodiment of the present application;

[0048] Figure 6B A light emitting waveform diagram under a second display scenario provided in an embodiment of the present application;

[0049] Fig. 7A A display scene switching logic diagram provided in an embodiment of the present application;

[0050] Figure 7B A display interface scene switching diagram of a display panel provided in an embodiment of the present application;

[0051] Figure 7C A display interface scene switching diagram of another display panel provided in an embodiment of the present application;

[0052] Fig. 8A A display interface scene switching diagram of another display panel provided in an embodiment of the present application;

[0053] Figure 8B A display interface scene switching diagram of another display panel provided in an embodiment of the present application;

[0054] Fig. 9A A driving timing diagram of another display panel provided in an embodiment of the present application;

[0055] Fig. 9B A display scene switching diagram provided in an embodiment of the present application;

[0056] Fig.10 A light emitting waveform diagram under three display scenarios provided in an embodiment of the present application;

[0057] Fig.11 A driving timing diagram of another display panel provided in an embodiment of the present application;

[0058] Fig. 12A A brightness diagram of different grayscales in a low-brightness scene provided by an embodiment of the present application;

[0059] Fig. 12B This is another brightness diagram of different grayscales in a low-brightness scene provided by an embodiment of the present application. DETAILED DESCRIPTION

[0060] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0061] In the following, the terms "second", "first", etc. are used only for convenience of description and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "second", "first", etc. may explicitly or implicitly include one or more of the feature. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0062] In addition, in the embodiments of the present application, directional terms such as "up", "down", "left" and "right" may be defined including but not limited to the orientation relative to the schematic placement of the components in the drawings. It should be understood that these directional terms may be relative concepts, which are used for relative description and clarification, and may change accordingly according to changes in the orientation of the components in the drawings.

[0063] In the embodiments of the present application, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. In addition, the term "coupled" can be a direct electrical connection or an indirect electrical connection through an intermediate medium. The term "contact" can be a direct contact or an indirect contact through an intermediate medium.

[0064] In the embodiments of the present application, "and / or" describes the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B may represent: A exists alone, A and B exist at the same time, and B exists alone, where A and B may be singular or plural. The character " / " generally indicates that the associated objects are in an "or" relationship.

[0065] The embodiment of the present application provides an electronic device, which may be, for example, a folding electronic device. The electronic device may be, for example, a consumer electronic product, a home electronic product, a vehicle-mounted electronic product, or a financial electronic product. Among them, consumer electronic products may be, for example, mobile phones, tablet computers, laptop computers, e-readers, personal computers (PCs), personal digital assistants (PDAs), desktop displays, smart wearable products (e.g., smart watches, smart bracelets), virtual reality (VR) electronic devices, augmented reality (AR) electronic devices, mixed reality (MR) electronic devices, artificial intelligence (AI) electronic devices, drones, etc. Home electronic products may be, for example, smart door locks, televisions, refrigerators, rechargeable small household appliances (e.g., soybean milk machines, sweeping robots), etc. Vehicle-mounted electronic products may be, for example, vehicle-mounted navigation systems, vehicle-mounted DVDs, etc. Financial electronic products may be, for example, ATM machines, electronic devices for self-service transactions, etc.

[0066] The embodiments of the present application do not impose any special restrictions on the specific form of the above-mentioned electronic device. For the convenience of explanation, the following embodiments are all illustrated by taking the electronic device as a mobile phone.

[0067] Figure 1 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application.

[0068] like Figure 1 As shown, the electronic device 1 includes a display module 40 and a driving controller 30. In some embodiments, the electronic device 1 also includes a power management integrated circuit (power management IC, PMIC) ( Figure 1 The PIMC is used to supply power to the display driver integrated circuit 20 and the driver controller 30.

[0069] The drive controller 30 is the core of the electronic device 1 and is used for overall system processing control. The drive controller 30 is coupled to the display module 40, and the drive controller 30 receives image signals and control signals (for example, provided by a central processing unit (CPU)). The drive controller 30 outputs image data that matches the interface specifications of the display module 40 according to the image signal. The drive controller 30 includes, for example, a system on chips (SOC). The drive controller 30 can be coupled to the display module 40 via a mobile industry processor interface (MIPI) interface. Of course, the drive controller 30 can also be coupled to the display module 40 via other serial / deserial (SerDes) high-speed interfaces.

[0070] The display module 40 , for example, includes a display panel 10 and a display driver integrated circuit 20 . The display driver integrated circuit 20 serves as a control core of the display panel 10 , and is used to drive the display panel 10 to work and receive data from the driver controller 30 .

[0071] The display driver integrated circuit 20 is coupled to the driver controller 30, receives the signal output by the driver controller 30, and provides the display panel 10 with the scanning signal and data signal required for emitting light. The signal sent by the display driver integrated circuit 20 will be described below in combination with the structure of the pixel circuit.

[0072] For example, the display driver integrated circuit 20 receives a data control signal and image data from the driver controller 30. The display driver integrated circuit 20 converts the image data into a data signal and outputs the data signal to a plurality of data signal lines. The data signal is an analog voltage corresponding to the grayscale value of the image data. The display driver integrated circuit 20 is also used to output a scanning control signal such as a clock signal, a gate start signal STV, a reset signal, etc. required for display to the display panel 10. The display driver integrated circuit 20 includes, for example, a display driver chip (display drive integrated circuit, DDIC).

[0073] The display panel 10 is used as a display data presentation unit to present the display and control data sent by the driving controller 30. For example, the display panel 10 is a self-luminous display module 40 such as an organic light emitting diode (OLED) display module 40, an active-matrix organic light-emitting diode (AMOLED) display module 40, a mini organic light-emitting diode (Mini-OLED) display module 40, a micro light-emitting diode (Micro-LED) display module 40, a micro organic light-emitting diode (Micro-OLED) display module 40, a quantum dot light emitting diode (QLED) display module 40, etc. At this time, the display panel 10 can be a rigid display panel, and the display panel 10 can also be a flexible display panel.

[0074] For any of the above display panels 10, the display panel 10 includes an active display area (AA) and a non-display area BB located around the active display area AA. The active display area AA is used to display an image, and the active display area AA includes a plurality of sub pixels (SP), each of which is provided with a pixel circuit 11, and the pixel circuit 11 receives a data signal provided by a display driver integrated circuit 20. The non-display area BB includes a drive circuit, and the drive circuit receives a scan control signal provided by the display driver integrated circuit 20.

[0075] In the present application, the pixel circuits 11 are described by taking a matrix arrangement as an example. The pixel circuits 11 arranged in a row along the horizontal direction X are called pixel circuits 11 in the same row, and the pixel circuits 11 arranged in a row along the vertical direction Y are called pixel circuits 11 in the same column.

[0076] In some embodiments, the pixel circuit 11 generally includes a driving circuit and a light-emitting device composed of multiple transistors, and the driving circuit generates a driving current to drive the light-emitting device to emit light, so as to realize the light emission of the pixel circuit 11. Multiple pixel circuits 11 are arranged in an array on a substrate. For example, a structure including a substrate and multiple driving circuits arranged in an array is called an array substrate. Multiple light-emitting devices are arranged on the array substrate, and the light-emitting devices are coupled to the pixel circuits in a one-to-one correspondence. Alternatively, it can be understood that the display panel 10 includes an array substrate and multiple light-emitting devices, and the array substrate includes a substrate and a driving circuit arranged in an array, and the driving circuit and the light-emitting device are coupled to form the pixel circuit 11.

[0077] Figure 2A A schematic diagram of a topological structure of a pixel circuit provided in an embodiment of the present application.

[0078] In some embodiments, Figure 2A As shown, the pixel circuit 11 includes an anode reset circuit 111 , a second node initialization circuit 112 , a first node initialization circuit 113 , a writing and threshold compensation circuit 114 , a light emitting control circuit 115 and a light emitting device 116 . Figure 2A The pixel circuit 11 shown is only for illustration and is not intended to be limiting.

[0079] The anode reset circuit 111 includes a seventh transistor T7, the second node initialization circuit 112 includes an eighth transistor T8, the first node initialization circuit 113 includes a fourth transistor T4 and a third transistor T3, the write and threshold compensation circuit 114 includes a second transistor T2, a first transistor T1, a third transistor T3, and a storage capacitor Cst, and the light control circuit 115 includes a fifth transistor T5 and a sixth transistor T6. The first transistor T1 is a driving transistor, and the remaining transistors are switch transistors. The first node initialization circuit 113 and the write and threshold compensation circuit 114 share the third transistor T3. The light emitting device 116 is, for example, an OLED.

[0080] The gates of the seventh transistor T7 and the eighth transistor T8 are controlled by the first control signal terminal S1, the gate of the fourth transistor T4 is controlled by the second control signal terminal S2, the gate of the third transistor T3 is controlled by the third control signal terminal S3, and the gate of the second transistor T2 is controlled by the fourth control signal terminal S4.

[0081] Figure 2B A schematic diagram of the structure of a display panel provided in an embodiment of the present application is shown in FIG. Figure 2C A schematic diagram of the structure of another display panel provided in an embodiment of the present application.

[0082] In some embodiments, Figure 2B As shown, the display panel 10 includes an array substrate and a plurality of light emitting devices 116 disposed on the array substrate. Figure 2B The structure of a light emitting device 116 is schematically shown. The array substrate includes a substrate and an anode reset circuit 111, a second node initialization circuit 112, a first node initialization circuit 113, a writing and threshold compensation circuit 114, and a light emitting control circuit 115 arranged on the substrate.

[0083] The light emitting device 116 includes a first electrode layer, a first light emitting layer and a second electrode layer which are sequentially arranged on the array substrate. Such a display panel 10 is known in the art as a single OLED panel.

[0084] In other embodiments, Figure 2C As shown, the display panel 10 includes an array substrate and a plurality of light emitting devices 116 disposed on the array substrate. Figure 2C The structure of a light emitting device 116 is schematically shown. The array substrate includes a substrate and an anode reset circuit 111, a second node initialization circuit 112, a first node initialization circuit 113, a writing and threshold compensation circuit 114, and a light emitting control circuit 115 arranged on the substrate.

[0085] The light emitting device 116 includes a first electrode layer, a first light emitting layer, a conductive connection layer, a second light emitting layer, and a second electrode layer sequentially arranged on the array substrate. Such a display panel 10 is referred to as a tandem OLED panel in the art. At this time, the light emitting device 116 is equivalent to a first sub-light emitting device OLED1 and a second sub-light emitting device OLED2 connected in series, and the first sub-light emitting device OLED1 and the second sub-light emitting device OLED2 are connected in series through a conductive connection layer. The first sub-light emitting device OLED1 has a first parasitic capacitor C1, and the second sub-light emitting device OLED2 has a second parasitic capacitor C2.

[0086] The first light-emitting layer and the second light-emitting layer are used to emit light of the same color. Taking the first light-emitting layer as an example, the first light-emitting layer includes an organic light-emitting layer, and the first light-emitting layer may also include at least one of a hole injection layer, a hole transport layer, an electron blocking layer, a hole blocking layer, an electron transport layer, and an electron injection layer. The organic light-emitting layer in the first light-emitting layer and the organic light-emitting layer in the second light-emitting layer may be used to emit light of the same color or different colors.

[0087] For example, the first electrode layer serves as the anode of the light-emitting device 116, and the second electrode layer serves as the cathode of the light-emitting device 116. A relatively high potential is applied to the first electrode layer, and a relatively low potential is applied to the second electrode layer. Then, holes are injected from the first electrode layer into the first light-emitting layer, and electrons are injected from the second electrode layer into the first light-emitting layer via the conductive connection layer. The energy generated by the recombination of holes and electrons in the first light-emitting layer can excite the first light-emitting layer to emit light. Similarly, holes are injected from the first electrode layer into the second light-emitting layer via the conductive connection layer, and electrons are injected from the second electrode layer into the second light-emitting layer. The energy generated by the recombination of holes and electrons in the second light-emitting layer can excite the second light-emitting layer to emit light. Both the second electrode layer and the conductive connection layer are transparent conductive layers. Light of the same color emitted by the first light-emitting layer and the second light-emitting layer is superimposed and emitted from the second electrode layer side.

[0088] Of course, the light emitting device 116 may include more light emitting layers, and a conductive connection layer is provided between adjacent light emitting layers. Figure 2C The figure is for illustration only.

[0089] like Figure 1 As shown, in some embodiments, the display panel 10 further includes a light emitting control signal generating circuit 12 , and the light emitting control signal generating circuit 12 is used to transmit a light emitting control signal em to the light emitting control signal terminals EM of the plurality of pixel circuits 11 in the display panel 10 .

[0090] Figure 2D A schematic diagram of the structure of a light emitting control signal generating circuit provided in an embodiment of the present application.

[0091] In some embodiments, Figure 2D As shown, the light-emitting control signal generating circuit 12 includes at least two stages of cascaded shift registers RS(1) to RS(n). The signal input terminal VI of the first stage shift register RS(1) is used to receive the light-emitting control start signal STV-em. Except for the first stage shift register RS(1), the signal input terminal VI of each stage shift register RS(m) is coupled to the output terminal GO of the previous stage shift register RS(m-1). When the light-emitting control start signal STV-em is a start signal, the first stage shift register RS1 of the light-emitting control signal generating circuit 12 starts to work, and then the multi-stage shift registers start to work step by step.

[0092] For example, the light emission control start signal STV-em is provided by the display driver integrated circuit 20. The display panel 10 is used to receive the light emission control start signal STV-em sent by the display driver integrated circuit 20, and generate the light emission control signal em required by the pixel circuit 11. The timing of the light emission control signal em received by each row of pixel circuits is the same as the timing of the light emission control start signal STV-em.

[0093] Similarly, in some embodiments, the display panel 10 further includes a first control signal generating circuit (or understood as an anode reset control signal generating circuit) 13, and the first control signal generating circuit 13 is used to transmit a first control signal s1 to each row of pixel circuits 11. The reset start signal STV-s1 required by the first control signal generating circuit 13 is provided by the display driver integrated circuit 20. The timing of the first control signal s1 received by each row of pixel circuits is the same as the timing of the reset start signal STV-s1.

[0094] The display panel 10 further includes a second control signal generating circuit 14, which is used to transmit a second control signal s2 to each row of pixel circuits 11. The initialization start signal STV-s2 required by the second control signal generating circuit 14 is provided by the display driver integrated circuit 20. The timing of the second control signal s2 received by each row of pixel circuits is the same as the timing of the initialization start signal STV-s2.

[0095] The display panel 10 further includes a third control signal generating circuit 15, which is used to transmit a third control signal s3 to each row of pixel circuits 11. The compensation start signal STV-s3 required by the third control signal generating circuit 15 is provided by the display driver integrated circuit 20. The timing of the third control signal s3 received by each row of pixel circuits is the same as the timing of the compensation start signal STV-s3.

[0096] The display panel 10 further includes a fourth control signal generating circuit 16, which is used to transmit a fourth control signal s4 to each row of pixel circuits 11. The write start signal STV-s4 required by the fourth control signal generating circuit 16 is provided by the display driver integrated circuit 20. The timing of the fourth control signal s4 received by each row of pixel circuits is the same as the timing of the write start signal STV-s4.

[0097] Therefore, by adjusting the timing of the light emission control start signal STV-em, the reset start signal STV-s1, the initialization start signal STV-s2, the compensation start signal STV-s3 and the writing start signal STV-s4, the display state of the display panel 10 can be adjusted.

[0098] Figure 2E A driving timing diagram of a pixel circuit provided in an embodiment of the present application.

[0099] Combination Figure 2A and Figure 2E As shown, the light emitting process of the pixel circuit 11 in one frame can be divided into an initialization stage t1, a threshold compensation stage t2, a light emitting stage t3 and an anode reset stage t4.

[0100] In the initialization phase t1:

[0101] The second control signal s2 of the second control signal terminal S2 and the third control signal s3 of the third control signal terminal S3 jump from low level to high level, and then jump from high level to low level. Therefore, the fourth transistor T4 and the third transistor T3 change from off to on, and then from on to off. The first control signal s1 of the first control signal terminal S1, the fourth control signal s4 of the fourth control signal terminal S4 and the light emitting control signal em of the light emitting control signal terminal EM all maintain a high level, so the seventh transistor T7, the eighth transistor T8, the second transistor T2, the fifth transistor T5 and the sixth transistor T6 all maintain an off state.

[0102] In the initialization stage t1, the first transistor T1, the third transistor T3 and the fourth transistor T4 are turned on respectively, and the voltage control of the fourth node N4, the second node N2 and the first node N1 is realized. Since the third transistor T3 and the fourth transistor T4 are respectively used as switch tubes, the first node N1 is electrically connected to the control electrode of the first transistor T1, and the second node N2 is electrically connected to the fourth node N4, so in the initialization stage t1, the control electrode voltage control of the first transistor T1, the voltage control of the first node N1, the voltage control of the second node N2 and the voltage control of the fourth node N4 are realized, so that the control electrode voltage of the first transistor T1, the voltage of the first node N1, the voltage of the second node N2 and the voltage of the fourth node N4 are respectively the first initialization voltage of the first initialization voltage terminal Vinit1, that is, the control electrode of the first transistor T1, the first node N1, the second node N2 and the fourth node N4 are reset.

[0103] In the threshold compensation phase t2:

[0104] The first control signal s1 of the first control signal terminal S1 changes from a high level to a low level, and then from a low level to a high level. Thus, the second transistor T2 changes from off to on, and then from on to off. The third control signal s3 of the third control signal terminal S3 changes from a low level to a high level, and then from a high level to a low level. Thus, the third transistor T3 changes from off to on, and then from on to off. The first control signal s1 of the first control signal terminal S1 and the light-emitting control signal em of the light-emitting control signal terminal EM both maintain a high level, and the second control signal s2 of the second control signal terminal S2 maintains a low level. Therefore, the seventh transistor T7, the eighth transistor T8, the fifth transistor T5, the sixth transistor T6 and the fourth transistor T4 all remain in an off state.

[0105] In the threshold compensation stage t2, the second transistor T2, the third transistor T3 and the first transistor T1 are turned on respectively, so that the data voltage of the data voltage terminal Vd is stored in the storage capacitor Cst, and the writing of the data voltage is completed. The threshold voltage of the first transistor T1 is compensated. The compensation process of the threshold voltage of the first transistor T1 can be considered as the process of the first transistor T1 changing from the on state to the off state.

[0106] In the light-emitting phase t3:

[0107] The light emitting control signal em of the light emitting control signal terminal EM changes from a high level to a low level, and then changes from a low level to a high level. Thus, the sixth transistor T6 and the fifth transistor T5 change from off to on, and then from on to off. The second control signal s2 of the second control signal terminal S2 and the third control signal s3 of the third control signal terminal S3 respectively maintain a low level, and the fourth transistor T4 and the third transistor T3 both maintain an off state. The first control signal s1 of the first control signal terminal S1 and the fourth control signal s4 of the fourth control signal terminal S4 respectively maintain a high level, and the seventh transistor T7, the eighth transistor T8 and the second transistor T2 all maintain an off state.

[0108] In the light emitting stage t3 , the fifth transistor T5 , the first transistor T1 and the sixth transistor T6 are turned on respectively to transmit the driving current to the light emitting device 116 , and the light emitting device 116 emits light under the driving current.

[0109] Anode reset phase t:

[0110] The first control signal s1 of the first control signal terminal S1 changes from a high level to a low level, and then changes from a low level to a high level. Thus, the seventh transistor T7 and the eighth transistor T8 change from off to on, and then from on to off. The second control signal s2 of the second control signal terminal S2 and the third control signal s3 of the third control signal terminal S3 always maintain a low level, and the fourth control signal s4 of the fourth control signal terminal S4 and the light-emitting control signal em of the light-emitting control signal terminal EM always maintain a high level. The third transistor T3, the fourth transistor T4, the second transistor T2, the fifth transistor T5 and the sixth transistor T6 all remain in the off state.

[0111] In the anode reset stage t, the seventh transistor T7 and the eighth transistor T8 are turned on, realizing the control of the voltage of the second node N2 and the control of the anode voltage of the light-emitting device 116, so that the voltage of the second node N2 is the third initialization voltage of the third initialization voltage terminal Vinit3, and the voltage of the anode of the light-emitting device 116 is the second initialization voltage of the second initialization voltage terminal Vinit2, realizing the resetting of the second node N2 and the anode voltage of the light-emitting device 116.

[0112] When the display panel 10 displays at different brightness, the control signal or voltage received by the pixel circuit 11 in the display panel 10 will be dynamically adjusted in real time.

[0113] Figure 3A A brightness variation diagram corresponding to the timing of a light emitting control start signal provided in an embodiment of the present application, Figure 3B A light emitting waveform diagram provided in an embodiment of the present application.

[0114] like Figure 3A As shown, the frequency of the reset start signal STV-s1 is 360 Hz. The screen refresh frequencies supported by the display panel 10 may include 10 Hz, 20 Hz, 30 Hz, 60 Hz, 72 Hz, 90 Hz, and 120 Hz. Figure 3A The corresponding diagrams of the luminous brightness under various screen refresh frequencies are shown in FIG. 1. Taking the screen refresh rate of the display panel 10 as 120 Hz as an example, the frequency of the reset start signal STV-s1 is 360 Hz, and the frequency of the light control start signal STV-em is 1440 Hz. In one image frame, the reset start signal STV-s1 includes 3 pulses, which will reset the anode of the light emitting device 116 3 times. The light control start signal STV-em includes 12 pulses, and each pulse of the reset start signal STV-s1 is followed by 4 pulses of the light control start signal STV-em.

[0115] like Figure 2E As shown, before entering the light-emitting stage t3, an anode reset is performed, and the voltage of the second node N2 and the anode of the light-emitting device 116 is refreshed and reset during the anode reset stage t. Figure 3A As shown in FIG. 1 , this results in insufficient lighting of the first light emitting pulse (the pulse indicated by the arrow) after the anode is reset, thereby deteriorating the stroboscopic effect visibility measure (SVM) of the display panel 10 and the smear effect under the digital domain compensation (OD) technology. Figure 3B As shown, based on the structural characteristics of the light emitting device 116, the first few ( Figure 3B The brightness of the 3 circles in the figure is lower than that of the following waves. Figure 3B Each luminous wave has two convex pulses, and the convexity indicated by the arrow corresponds to Figure 3A The luminous brightness under the first pulse after the middle anode is reset, and the second bump is the luminous brightness under the remaining pulses.

[0116] Figure 4A A timing diagram of a light emitting control start signal provided in an embodiment of the present application, Figure 4BAnother light emitting waveform diagram provided in an embodiment of the present application is: Figure 4C Another luminous waveform diagram provided in an embodiment of the present application.

[0117] The lack of lighting caused by anode reset will lead to uneven overall lighting stages, while SVM requires a uniform lighting ratio and minimizes the non-lighting ratio, thereby improving the flickering problem. Figure 4A As shown, by changing the pulse width of the light-emitting control start signal STV-em, increasing the width of the first pulse after the anode is reset, and using unequal pulse widths to achieve a more uniform brightness within a light-emitting cycle, the effect of optimizing the flash screen is achieved.

[0118] By changing the pulse width of the light control start signal STV-em, the light brightness corresponding to the first pulse after the anode reset can be increased. However, this will cause the overall actual light waveform to no longer strictly maintain the same pattern. After combining with OD technology, in the smear compensation scheme, due to the inconsistent shape of the light waveform, it is impossible to perform perfect smear compensation, and there are problems such as Figure 4B Overcompensation as shown or Figure 4C The under-compensation situation shown.

[0119] Based on this, an embodiment of the present application provides an electronic device 1 , which includes the above-mentioned display panel 10 , a display driver integrated circuit 20 and a driver controller 30 , and is used to optimize the display effect of the display panel 10 .

[0120] Figure 5 A driving timing diagram of a display panel provided in an embodiment of the present application. Fig. 6A A light emitting waveform diagram under a first display scenario provided in an embodiment of the present application, Figure 6B A light emitting waveform diagram under a second display scenario provided in an embodiment of the present application. In an embodiment of the present application, the first display scene includes, for example, a dynamic frame scene, and the second display scene includes, for example, a static frame scene. Alternatively, the first display scene includes, for example, a dark mode scene, and the second display scene includes, for example, a light mode scene. An embodiment of the present application provides a display driver integrated circuit 20, which is used to provide a start signal to a display panel 10 to drive the display panel 10 to display an image.

[0121] The display driver integrated circuit 20 is also used to receive the first instruction and output the following to the display panel 10: Figure 5The first anode reset start signal STV-s11 and the first light-emitting control start signal STV-em1 shown, for example, the display panel 10 enters the first display scene. In the first display scene, in an image frame, the first anode reset start signal STV-s11 includes N first anode reset pulses, and the first light-emitting control start signal STV-em1 includes M*N first light-emitting control pulses. Each first anode reset pulse corresponds to M first light-emitting control pulses, or it can be understood that the M first light-emitting control pulses are a repeating unit. Among the M first light-emitting control pulses, the width of the first W first light-emitting control pulses is less than the width of the remaining MW first light-emitting control pulses. N and W are integers greater than or equal to 1, M is an integer greater than 1, and W is an integer greater than 1. <M。

[0122] Figure 5 In an image frame, the first anode reset start signal STV-s11 includes 3 first anode reset pulses, the first light-emitting control start signal STV-em1 includes 4*3 first light-emitting control pulses, and each first anode reset pulse is followed by 4 first light-emitting control pulses as an example for illustration. For example, the frequency of the first anode reset start signal STV-s11 is 360HZ, and the frequency of the first light-emitting control start signal STV-em1 is 1440HZ. Alternatively, the first anode reset start signal STV-s11 includes 4 first anode reset pulses, the first light-emitting control start signal STV-em1 includes 3*4 first light-emitting control pulses, and each first anode reset pulse is followed by 3 first light-emitting control pulses. The embodiments of the present application are only for illustration and are not limited in any way.

[0123] Four first light-emitting control pulses form a repeating unit, and the width of the first W first light-emitting control pulses in each repeating unit is smaller than the width of the W+1th to Mth first light-emitting control pulses. Alternatively, in each repeating unit, the width of the first few first light-emitting control pulses is relatively small, and the width of the last few first light-emitting control pulses is relatively large. Figure 5 In the example, the width of the first first light-emitting control pulse is small, and the widths of the remaining three first light-emitting control pulses are large. Alternatively, the widths of the first two first light-emitting control pulses are small, and the widths of the remaining two first light-emitting control pulses are large. In this case, the widths of the first two first light-emitting control pulses may be equal or unequal.

[0124] In some embodiments, the width of the first W first light-emitting control pulses is less than or equal to 16H. For example, the width of the first W first light-emitting control pulses is 16H, 12H, 10H, 8H or 4H, etc. H is the duration of writing the data voltage to a row of pixel circuits 11 in the display panel 10, and the width of the pulse is the duration of the start signal in one pulse cycle. The start signal is, for example, a low-level signal.

[0125] For example, in each repetition unit, the width of the first first light-emitting control pulse is 10H, and the widths of the remaining three first light-emitting control pulses are 25H.

[0126] In the first display scenario, the width of the first W (for example, the first) first light control pulses after the anode reset in each repeating unit of the first light control start signal STV-em1 can be reduced to reduce the light brightness corresponding to the first W first light control pulses. Originally, due to the influence of the anode reset, the light brightness under the first W first light control pulses is weaker than the light brightness under the remaining first light control pulses. After reducing the width of the first W first light control pulses, the light brightness under the first W first light control pulses will be further reduced, and the light brightness under the first W first light control pulses can be almost ignored. Fig. 6A As shown, the luminous waveform under each repeating unit changes from multiple peaks (such as double peaks) to a single peak, achieving a unified actual luminous waveform. That is, the consistency of luminous brightness is relatively high, which helps to improve the problem of smearing.

[0127] In some embodiments, after entering the first display scene, the display driver integrated circuit 20 also triggers compensation. When the display driver integrated circuit 20 outputs the first light emission control start signal STV-em1 to the display panel 10, it outputs the second compensation data voltage to the display panel 10. By performing OD compensation on the display panel 10, the brightness consistency can be further improved and the problem of display smear can be improved.

[0128] The embodiment of the present application does not limit the specific compensation method for the second compensation data voltage. The compensation schemes in the related art are applicable to the embodiment of the present application, as long as the brightness in the first display scene is uniform. It can be to compensate the data voltage under some pulses in an image frame, or it can be to compensate the data voltage under all pulses in an image frame. It can be to compensate the data voltage of some pixel circuit rows in an image frame, or it can be to compensate the data voltage of all pixel rows in an image frame. The compensation coefficients of the data voltage in different rows can be different, and the method for determining the compensation coefficient can be any compensation coefficient determination method used in the related art for OD compensation.

[0129] In some embodiments, the display driver integrated circuit 20 is further configured to receive a second instruction and output to the display panel 10: Figure 5The second anode reset start signal STV-s12 and the second light-emitting control start signal STV-em2 shown, for example, the display panel 10 enters the second display scene. In the second display scene, in an image frame, the second anode reset start signal STV-s12 includes O second anode reset pulses, and the second light-emitting control start signal STV-em2 includes P*O second light-emitting control pulses, and each second anode reset pulse corresponds to P second light-emitting control pulses, or it can be understood that P second light-emitting control pulses are a repeating unit. Among the P second light-emitting control pulses, the width of the first Q second light-emitting control pulses is greater than the width of the remaining PQ second light-emitting control pulses; O and Q are integers greater than or equal to 1, P is an integer greater than 1, and Q <P。

[0130] Figure 5 In an image frame, the second anode reset start signal STV-s12 includes 3 second anode reset pulses, the second light-emitting control start signal STV-em2 includes 4*3 second light-emitting control pulses, and each second anode reset pulse is followed by 4 second light-emitting control pulses as an example for illustration. For example, the frequency of the second anode reset start signal STV-s12 is 360HZ, and the frequency of the second light-emitting control start signal STV-em2 is 1440HZ. Alternatively, the second anode reset start signal STV-s12 includes 4 second anode reset pulses, the second light-emitting control start signal STV-em2 includes 3*4 second light-emitting control pulses, and each second anode reset pulse is followed by 3 second light-emitting control pulses. The embodiments of the present application are only for illustration and are not limited in any way.

[0131] Four second light-emitting control pulses form a repeating unit, and the width of the first Q second light-emitting control pulses in each repeating unit is greater than the width of the Q+1th to Pth second light-emitting control pulses. Alternatively, in each repeating unit, the widths of the first few second light-emitting control pulses are relatively large, and the widths of the last few second light-emitting control pulses are relatively small. Figure 5 In the example, the width of the first second light-emitting control pulse is large, and the widths of the remaining three second light-emitting control pulses are small. Alternatively, the widths of the first two second light-emitting control pulses are large, and the widths of the remaining two second light-emitting control pulses are small. In this case, the widths of the first two second light-emitting control pulses may be equal or unequal.

[0132] For example, in each repetition unit, the width of the first second light-emitting control pulse is 52H, and the widths of the remaining three second light-emitting control pulses are 12H.

[0133] In the second display scenario, increasing the width of the first Q (e.g., first) second light control pulses in each repeating unit after the anode reset in the second light control start signal STV-em2 can increase the luminous brightness corresponding to the first Q second light control pulses. Originally, due to the influence of the anode reset, the luminous brightness under the first Q second light control pulses is weaker than the luminous brightness under the remaining second light control pulses. After increasing the width of the first Q second light control pulses, the luminous brightness under the first Q second light control pulses will increase. Figure 6B As shown, the luminous waveform under each pulse is approximately the same, and a relatively uniform actual luminous waveform is achieved. That is, the luminous brightness is always relatively uniform, which helps to improve the flicker problem.

[0134] Based on this, the display driver integrated circuit 20 provided in the embodiment of the present application can improve the ghosting problem in the first display scene and the flickering problem in the second display scene by outputting light control start signals with different timings for the first display scene and the second display scene, so that the first display scene and the second display scene have better display effects respectively.

[0135] In the embodiment of the present application, the first instruction and the second instruction received by the display driver integrated circuit 20 are provided by the driver controller 30 , for example.

[0136] Fig. 7A A display scene switching logic diagram provided in an embodiment of the present application, Figure 7B A display interface scene switching diagram of a display panel provided in an embodiment of the present application, Figure 7C A display interface scene switching diagram of another display panel provided in an embodiment of the present application.

[0137] In some embodiments, Fig. 7A As shown, the first instruction instructs the display panel 10 to enter the first display scene of the dynamic image frame, which is used to drive the display panel 10 to switch the display interface. The second instruction instructs the display panel 10 to enter the second display scene of the static image frame, which is used to drive the display panel 10 not to switch the display interface.

[0138] For example, Figure 7B As shown, the first instruction includes a picture sending refresh instruction, for example, the picture sending refresh instruction is a instruction triggered when the driver controller 30 sends image data to the display driver integrated circuit 20. The second instruction includes a self-refresh instruction, at which time the image data is fixed and there is no new image data. The driver controller 30 sends a self-refresh instruction to the display driver integrated circuit 20.

[0139] Optionally, the current display scene is a dynamic frame scene, the driving controller 30 sends new image data to the display driver integrated circuit 20, and sends a picture refresh instruction to the display driver integrated circuit 20, and the display driver integrated circuit 20 still enters the dynamic frame scene.

[0140] Alternatively, if the current display scene is a static frame scene, the driver controller 30 sends new image data to the display driver integrated circuit 20 and sends a refresh instruction to the display driver integrated circuit 20, and the display driver integrated circuit 20 enters a dynamic frame scene. Figure 7B As shown, the display panel 10 displays the first display interface. The first display interface may be a display interface in a dynamic frame scene, or a display interface in a static frame scene. After receiving the first instruction, the display driver integrated circuit 20 sends a signal to the display panel 10. Figure 5 The first light emitting control start signal STV-em1 shown. Synchronously, the display driver integrated circuit 20 also sends a data voltage corresponding to the image data to the display panel 10. At this time, the data voltage can be a compensated data voltage or an uncompensated data voltage. After receiving the first light emitting control start signal STV-em1, the display panel 10 displays the corresponding second display interface based on the data voltage. At this time, the display interface of the display panel 10 is switched from the first display interface to the second display interface.

[0141] Or, optionally, the current display scene is a dynamic frame scene, the driving controller 30 does not send new image data to the display driver integrated circuit 20, sends a self-refresh instruction to the display driver integrated circuit 20, and the display driver integrated circuit 20 enters a static frame scene.

[0142] Or, optionally, the current display scene is a static frame scene, the driving controller 30 does not send new image data to the display driver integrated circuit 20, sends a self-refresh instruction to the display driver integrated circuit 20, and the display driver integrated circuit 20 still enters the static frame scene.

[0143] For example, Figure 7C As shown, the display panel 10 displays the third display interface. The third display interface may be a display interface in a dynamic frame scene, or a display interface in a static frame scene. After receiving the second instruction, the display driver integrated circuit 20 sends a signal to the display panel 10. Figure 5The second light emitting control start signal STV-em2 is shown. Synchronously, the display driver integrated circuit 20 also sends a data voltage corresponding to the third display interface to the display panel 10. At this time, the data voltage can be a compensated data voltage or an uncompensated data voltage. After receiving the second light emitting control start signal STV-em2, the display panel 10 keeps displaying the third display interface based on the data voltage. At this time, the display interface of the display panel 10 always keeps the third display interface.

[0144] Since the display interface is constantly changing in dynamic frame scenes, there will be a situation where low grayscale jumps to high grayscale, resulting in serious ghosting problems in dynamic frame scenes. Since in static frame scenes, although the display interface does not change, the luminous brightness is constantly switching, resulting in serious flickering problems in static frame scenes. In the embodiment of the present application, by using the first luminous control start signal STV-em1 to drive the display panel 10 in the dynamic frame scene, the luminous brightness of the display panel 10 in the dynamic frame scene is uniform, which helps to improve the ghosting problem in the dynamic frame scene. By using the second luminous control start signal STV-em2 to drive the display panel 10 in the static frame scene, the luminous brightness of the display panel 10 in the static frame scene is uniform, which helps to improve the flickering problem in the static frame scene.

[0145] Fig. 8A A display interface scene switching diagram of another display panel provided in an embodiment of the present application, Figure 8B A display interface scene switching diagram of another display panel provided in an embodiment of the present application.

[0146] In some other embodiments, in the embodiment of the present application, the display driver integrated circuit 20 receives the first instruction to enter the first mode, and the display driver integrated circuit 20 receives the second instruction to enter the second mode. The first mode includes a dark mode, and the second mode includes a light mode. The dark mode represents a display mode in which the background of the display panel is dark and the text is light, and the light mode represents a display mode in which the background of the display panel is light and the text is dark. Dark colors are, for example, black or gray, and light colors are, for example, white.

[0147] For example, the first instruction instructs the display panel 10 to enter the dark mode, and the second instruction instructs the display panel 10 to enter the light mode. The electronic device can enter the dark mode or the light mode, or switch between the dark mode and the light mode by receiving the user's operation.

[0148] For example, the first instruction includes a dark mode start instruction, the driving controller 30 determines the user's instruction to enter the dark mode according to the touch position, and sends the first instruction to enter the dark mode to the display driver integrated circuit 20. The second instruction includes a light mode start instruction, the driving controller 30 determines the user's instruction to enter the light mode according to the touch position, and sends the second instruction to enter the light mode to the display driver integrated circuit 20.

[0149] For example, Fig. 8A As shown, the current display scene is in dark mode, the driving controller 30 sends a second instruction to the display driver integrated circuit 20 to enter the light mode, the display driver integrated circuit 20 switches to the light mode, and sends a second light emission control start signal STV-em2 to the display panel 10. The display panel 10 receives the second light emission control start signal STV-em2, and the display interface enters the light mode.

[0150] like Figure 8B As shown, the current display scene is in light mode, the driving controller 30 sends a first instruction to the display driver integrated circuit 20 to enter the dark mode, the display driver integrated circuit 20 switches to the dark mode, and sends a first light emission control start signal STV-em1 to the display panel 10. The display panel 10 receives the first light emission control start signal STV-em1, and the display interface enters the dark mode.

[0151] Since the brightness jump is obvious when changing from low grayscale to high grayscale in dark mode, the problem of ghosting is serious in dark mode. Since the luminous brightness is constantly switching in light mode, the problem of flickering is serious in light mode. In the embodiment of the present application, the display panel 10 is driven by using the first luminous control start signal STV-em1 in dark mode to make the luminous brightness of the display panel 10 uniform in dark mode, which helps to improve the problem of ghosting in dark mode. The display panel 10 is driven by using the second luminous control start signal STV-em2 in light mode to make the luminous brightness of the display panel 10 uniform in light mode, which helps to improve the problem of flickering in light mode.

[0152] Fig. 9A Another driving timing diagram of a display panel provided in an embodiment of the present application, Fig. 9B A display scene switching diagram provided in an embodiment of the present application. Fig.10 A light emitting waveform diagram under three display scenarios provided in an embodiment of the present application.

[0153] In some embodiments, Fig. 9AAs shown, the display driver integrated circuit 20 is also used to enter the third display scene, and the display driver integrated circuit 20 outputs a third light emission control start signal STV-em3 to the display panel 10. In the third display scene, in an image frame, the third light emission control start signal STV-em3 includes a plurality of third light emission control pulses of equal width. For example, in the third display scene, the display driver integrated circuit 20 also outputs a third anode reset start signal STV-s13 to the display panel 10, and the third anode reset start signal STV-s13 includes one or more third anode reset pulses, and the width of the third light emission control pulse after each third anode reset pulse is equal.

[0154] For example, the width of the third anode reset pulse is greater than the width of the Wth first anode reset pulse, and less than the width of the Qth second anode reset pulse.

[0155] For example, Fig. 9B As shown, when the received instruction is the first instruction, before outputting the first light emission control start signal STV-em1 to the display panel 10, the third display scene is entered and the third light emission control start signal STV-em3 is output to the display panel 10.

[0156] Or, for example, when the received instruction is the second instruction, before outputting the second light emission control start signal STV-em2 to the display panel 10, the third display scene is entered and the third light emission control start signal STV-em3 is output to the display panel 10.

[0157] For example, if the current display scene is a static frame scene, after receiving the first instruction to refresh the image, the display panel 10 will switch from the static frame scene to the dynamic frame scene. Then, before entering the dynamic frame scene, the third display scene is first entered.

[0158] Or, for example, if the current display scene is a dynamic frame scene, after receiving the second instruction to keep refreshing, the display panel 10 switches from the dynamic frame scene to the static frame scene. Then, before entering the static frame scene, the third display scene is first entered.

[0159] For another example, the current display scene is a light mode scene. After receiving the first instruction to enter the dark mode scene (for example, the user is using), the display panel 10 switches from the light mode scene to the dark mode scene. Then, before entering the dark mode scene, the third display scene is first entered.

[0160] Or, for example, the current display scene is a dark mode scene, and after receiving the second instruction to enter the light mode scene, the display panel 10 switches from the dark mode scene to the light mode scene. Then, before entering the light mode scene, the third display scene is first entered.

[0161] Alternatively, it can be understood that when the display panel 10 needs to switch the display scene, a transition frame in the third display scene is added before the display scene is switched. One transition frame may be included, or multiple transition frames may be included. When the display panel 10 is continuously in the first display scene or continuously in the second display scene, the above transition frame may be included between image frames, or may not be included.

[0162] like Fig.10 As shown, by setting a third light-emitting control start signal STV-em3 with a fixed pulse width, the instantaneous brightness in the third display scene is adjusted so that the average brightness in the third display scene can be between the light-emitting brightness in the first display scene and the light-emitting brightness in the second display scene, serving as a transition frame between the light-emitting brightness in the first display scene and the light-emitting brightness in the second display scene, thereby reducing the brightness difference when switching between the first display scene and the second display scene.

[0163] In some embodiments, the display driver integrated circuit 20 is further configured to output the first compensation data voltage to the display panel 10 when the third light emission control start signal STV-em3 is output to the display panel 10 after entering the third display scene. By adjusting the first compensation data voltage in the third display scene, the average brightness in the third display scene can be made the same or approximately the same as the average brightness in the first display scene and / or the average brightness in the second display scene, thereby realizing seamless switching between the first display scene and the second display scene.

[0164] The embodiment of the present application does not limit the specific compensation method for the first compensation data voltage, and the compensation schemes in the related art are all applicable to the embodiment of the present application, as long as the average brightness in the third display scene is the same or approximately the same as the average brightness in the first display scene and / or the average brightness in the second display scene.

[0165] For example, when switching from the first display scene to the second display scene, the data voltage of the third display scene is compensated, and the data voltage is increased to increase the brightness, so that the luminous brightness of the third display scene is as consistent as possible with the luminous brightness of the second display scene. In this switching, the second display scene is the target display scene. That is, the luminous brightness of the third display scene is as consistent as possible with the luminous brightness of the target display scene. By comparing the data voltage of the third display scene with the data voltage of the second display scene, it can be determined whether the data voltage of the third display scene is compensated.

[0166] Or, for example, when switching from the second display scene to the first display scene, the data voltage of the third display scene is compensated, the data voltage is reduced to reduce the brightness, and the luminous brightness of the third display scene is as consistent as possible with the luminous brightness of the first display scene. In this switching, the first display scene is the target display scene, that is, the luminous brightness of the third display scene is as consistent as possible with the luminous brightness of the target display scene.

[0167] In some embodiments, the display driver integrated circuit 20 is further configured to output a compensation initialization voltage to the display panel 10 when the third light emission control start signal STV-em3 is output to the display panel 10 after entering the third display scene. By adjusting the compensation initialization voltage in the third display scene, the average brightness in the third display scene can be made the same or approximately the same as the average brightness in the first display scene and / or the average brightness in the second display scene, thereby realizing a seamless switching between the first display scene and the second display scene.

[0168] The compensation initialization voltage may include one or more of a first initialization voltage of the first initialization voltage terminal Vinit1 , a second initialization voltage of the second initialization voltage terminal Vinit2 , and a third initialization voltage of the third initialization voltage terminal Vinit3 .

[0169] The embodiment of the present application does not limit the specific compensation method for compensating the initialization voltage. The compensation schemes in the related art are all applicable to the embodiment of the present application, as long as the average brightness in the third display scene is the same or approximately the same as the average brightness in the first display scene and / or the average brightness in the second display scene.

[0170] The display driver integrated circuit 20 provided in the embodiment of the present application can be applied to the display module 40 provided in the embodiment of the present application. The display driver integrated circuit 20 is coupled to the display panel 10 and is used to provide the display panel 10 with a light emission control start signal STV-em and a reset start signal STV-s1. The display panel 10 includes, for example, Figure 2B The display panel 10 is shown.

[0171] The embodiment of the present application also provides a driving method of an electronic device 1, and the electronic device 1 includes, for example, any of the above-mentioned electronic devices. The driving method of the electronic device 1 includes: the driving controller 30 sends a first instruction, the display driver integrated circuit 20 receives the first instruction, enters the above-mentioned first display scene, and drives the display panel 10 to drive according to the scheme in the first display scene. The driving controller 30 sends a second instruction, the display driver integrated circuit 20 receives the second instruction, enters the above-mentioned second display scene, and drives the display panel 10 to drive according to the scheme in the second display scene.

[0172] In some embodiments, the driving method of the electronic device 1 also includes: after the display driver integrated circuit 20 receives the first instruction, before entering the first display scene, the display driver integrated circuit 20 first enters the above-mentioned third display scene, drives the display panel 10 to be driven according to the scheme in the third display scene, and then enters the first display scene.

[0173] In some embodiments, the driving method of the electronic device 1 also includes: after the display driver integrated circuit 20 receives the second instruction, before entering the second display scene, the display driver integrated circuit 20 first enters the above-mentioned third display scene, drives the display panel 10 to be driven according to the scheme in the third display scene, and then enters the second display scene.

[0174] Fig.11 A driving timing diagram of another display panel provided in an embodiment of the present application.

[0175] The embodiment of the present application further provides a display driver integrated circuit 20 , which is used to provide a start signal to the display panel 10 to drive the display panel 10 to display an image.

[0176] The display driver integrated circuit 20 is also used to receive a first brightness instruction representing a first light emitting brightness and output a first brightness instruction to the display panel 10. Fig.11 The first reset start signal STV-s11 and the first light emission control start signal STV-em1 are shown.

[0177] The display driver integrated circuit 20 is also used to receive a second brightness instruction representing a second light emitting brightness and output a second brightness instruction to the display panel 10. Fig.11 The second reset start signal STV-s12 and the second light emission control start signal STV-em2 are shown.

[0178] The first luminous brightness is less than the set brightness, and the second luminous brightness is greater than or equal to the set brightness. The first luminous brightness can be understood as the brightness in a low-brightness display scene, and the second luminous brightness can be understood as the brightness in a high-brightness display scene. The set brightness is the critical dividing value between low brightness and high brightness, and the embodiment of the present application does not limit the value of the set brightness.

[0179] When the required brightness is less than the set brightness, the driving controller 30 sends a first brightness instruction to the display driver integrated circuit 20. The display driver integrated circuit 20 receives the first instruction and sends a first pulse sequence A including a first reset start signal STV-s11 and a first light emission control start signal STV-em1.

[0180] When the required brightness is greater than the set brightness, the driving controller 30 sends a second brightness instruction to the display driver integrated circuit 20. The display driver integrated circuit 20 receives the second instruction and sends a second pulse sequence B including a second reset start signal STV-s12 and a second light emission control start signal STV-em2.

[0181] The first brightness instruction and the second brightness instruction may be provided, for example, by the drive controller 30 in the electronic device 1. For example, the user or the CPU adjusts the brightness bar of the electronic device 1, and the drive controller 30 determines the brightness requirement in combination with the touch position. When the brightness requirement is greater than or equal to the set brightness, the second brightness instruction is sent to the display driver integrated circuit 20. When the brightness requirement is less than the set brightness, the first brightness instruction is sent to the display driver integrated circuit 20.

[0182] In some embodiments, Fig.11 As shown, the display panel 10 displays the first display interface, and the progress of the brightness bar in the first display interface is the first progress. The driving controller 30 determines that the brightness requirement is less than the set brightness based on the touch position corresponding to the first progress, and sends a first brightness instruction.

[0183] like Fig.11 As shown, the display panel 10 displays the second display interface, and the progress of the brightness bar in the second display interface is the second progress. The drive controller 30 determines that the brightness requirement is greater than or equal to the set brightness based on the touch position corresponding to the second progress, and sends a second brightness instruction. The display driver integrated circuit 20 sends the first pulse timing A.

[0184] When the progress of the brightness bar remains unchanged, the brightness of the display interface subsequently displayed by the display panel 10 remains unchanged. After the progress of the brightness bar is adjusted, the drive controller 30 re-determines whether to issue the first brightness instruction or the second brightness instruction. The display driver integrated circuit 20 sends the second pulse sequence B.

[0185] The type of pulse timing sent by the display driver integrated circuit 20 matches the interface type of the display panel 10. For example, the display panel 10 and the display driver integrated circuit 20 are coupled via a MIPI interface, and the type of pulse timing sent by the display driver integrated circuit 20 meets the data protocol of the MIPI interface.

[0186] In some embodiments, the frequency of the first reset start signal STV-s11 is f1, the frequency of the second reset start signal STV-s12 is f2, the frequency of the first light emission control start signal STV-em1 is f3, and the frequency of the second light emission control start signal STV-em2 is f4.

[0187] For example, Fig.11As shown, the frequency f3 of the first light control start signal STV-em1 is less than the frequency f4 of the second light control start signal STV-em2. In low brightness scenes, reducing the frequency of the light control signal em can reduce the power consumption of the display driver integrated circuit 20 without affecting the display effect.

[0188] Or, for example, the frequency f3 of the first light-emitting control start signal STV-em1 is equal to the frequency f4 of the second light-emitting control start signal STV-em2. The frequency of the light-emitting control signal em in a low-brightness scene is consistent with the frequency of the light-emitting control signal em in a high-brightness scene, and the display driver integrated circuit 20 does not need to change the frequency in different scenes, which can simplify the structure of the display driver integrated circuit 20.

[0189] Optionally, the frequency f3 of the first light emission control start signal STV-em1 is equal to 120 Hz.

[0190] It can be seen from the above description of the driving method of the pixel circuit 11 that in the anode reset stage t, the anode reset circuit 111 is turned on and the light emitting control circuit 115 needs to remain turned off. Figure 2A For the pixel circuit 11 in FIG. 1 , when the first control signal s1 is a low-level on signal, the light-emitting control signal em needs to be a high-level off signal. Therefore, before the first control signal s1 jumps to a low level each time, the light-emitting control signal em needs to jump to a high level first. In other words, the number of times the light-emitting control signal em jumps to a high level must be greater than or equal to the number of times the first control signal s1 jumps to a low level. That is, the frequency f3 of the first light-emitting control start signal STV-em1 must be greater than or equal to the frequency f1 of the first reset start signal STV-s11.

[0191] For example, Fig.11 As shown, the frequency f1 of the first reset start signal STV-s11 is equal to the frequency f3 of the first light emission control start signal STV-em1. The minimum frequency f3 satisfies the requirement of the frequency f1 of the first reset start signal STV-s11, which can reduce the power consumption of the display driver integrated circuit 20.

[0192] Alternatively, for example, the frequency f1 of the first reset start signal STV-s11 is lower than the frequency f3 of the first light emission control start signal STV-em1.

[0193] Similarly, the frequency f2 of the second reset start signal STV-s12 is less than or equal to the frequency f4 of the second light emission control start signal STV-em2.

[0194] In some embodiments, the frequency f1 of the first reset start signal STV-s11 is less than the frequency f2 of the second reset start signal STV-s12. That is, the number of times the anode of the light-emitting device is reset in a low-brightness scene is less than the number of times the anode of the light-emitting device is reset in a high-brightness scene, and the number of times the anode of the light-emitting device is reset in a low-brightness scene is reduced.

[0195] For example, the frequency f1 of the first reset start signal STV-s11 is equal to 120 Hz. That is, in one image frame, the first reset start signal STV-s11 appears as a low level start signal once. That is, in one image frame, the anode of the light emitting device needs to be reset once.

[0196] For example, the frequency f2 of the second reset start signal STV-s12 is greater than or equal to 3*120HZ (360HZ). That is, within one image frame, the second reset start signal STV-s12 must appear as a low-level start signal at least three times. That is, within one image frame, the anode of the light-emitting device must be reset at least three times. Optionally, the frequency f2 of the second reset start signal STV-s12 is an integer multiple of 360HZ (n*360HZ, n is a positive integer), for example, the frequency f2 of the second reset start signal STV-s12 is 360HZ, 720HZ or 1080HZ, etc.

[0197] By setting the frequency of the second reset start signal STV-s12 to an integer multiple of 360HZ, when the refresh rate of the display panel 10 is 120HZ, the second reset start signal STV-s12 in one image frame includes 3 pulses. When the refresh rate of the display panel 10 is 90HZ, the second reset start signal STV-s12 in one image frame includes 4 pulses. A set of gamma timing of the second reset start signal STV-s12 can be applied to a variety of refresh rates of the display panel 10. On the one hand, there is no need to switch the gamma timing, thereby reducing costs. On the other hand, seamless switching of the display panel 10 at different refresh rates can be achieved, thereby improving the display effect of the display panel 10.

[0198] In the embodiment of the present application, the widths of the low-level pulses in the first reset start signal STV-s11 may be completely equal, incompletely equal, or completely unequal. The widths of the low-level pulses in the second reset start signal STV-s12 may be completely equal, incompletely equal, or completely unequal. The widths of the low-level pulses in the first light-emitting control start signal STV-em1 may be completely equal, incompletely equal, or completely unequal. The widths of the low-level pulses in the second light-emitting control start signal STV-em2 may be completely equal, incompletely equal, or completely unequal.

[0199] In some embodiments, after receiving the first brightness instruction and the second brightness instruction, the timing of the initialization start signal STV-s2, the compensation start signal STV-s3 and the write start signal STV-s4 output to the display panel 10 by the display driver integrated circuit 20 may be the same or different, and the embodiments of the present application are not limited to this.

[0200] The display driver integrated circuit 20 provided in the embodiment of the present application can be applied to the display module 40 provided in the embodiment of the present application. The display driver integrated circuit 20 is coupled to the display panel 10 and is used to provide the display panel 10 with a light emission control start signal STV-em and a reset start signal STV-s1. The display panel 10 includes, for example, Figure 2C The display panel 10 is shown.

[0201] Fig. 12A A brightness diagram of different grayscales in a low-brightness scene provided by an embodiment of the present application, Fig. 12B This is another brightness diagram of different grayscales in a low-brightness scene provided by an embodiment of the present application.

[0202] Resetting the anode of the light-emitting device 116 is equivalent to completely discharging the residual charge in the first parasitic capacitor C1 and the second parasitic capacitor C2, and clearing the light leakage phenomenon introduced by the residual charge when the light-emitting control circuit 115 is turned off. Under the same target brightness, the smaller the current in the light leakage stage, the lower the light emission, resulting in an increase in the operating current required to turn on normal light emission. In other words, the charging current of the first parasitic capacitor C1 and the second parasitic capacitor C2 will increase. That is, the higher the frequency of the reset start signal STV-s1, the greater the charging current required for the capacitor, such as Fig. 12A As shown, in low brightness scenes, when the grayscale switches from low grayscale to high grayscale, the instantaneous capacitor charging current is larger, which may cause the average brightness obtained after brightness integration to be too bright (with bulges) at the circle position, thereby causing ghosting on the display panel 10. However, in high brightness scenes, the ghosting problem can be ignored.

[0203] The embodiment of the present application can reduce the problem of transient over-brightness of the light emitting device 116 due to the parasitic capacitor charging current in low-brightness scenes by reducing the number of times the anode of the light emitting device is reset in low-brightness scenes. Fig. 12B As shown in the figure, in low brightness scenes, when the grayscale switches from low grayscale to high grayscale, the problem of over-brightness at the circle position of the average brightness obtained after the instantaneous brightness is integrated is improved (the brightness bulge is weakened), thereby improving the ghosting problem of the display panel 10. In this way, ghost-free display is achieved in low brightness scenes, and flicker-free switching between 90HZ and 120HZ in high brightness scenes, thereby achieving the purpose of having the best display effect in both high and low brightness.

[0204] The embodiment of the present application further provides a driving method of an electronic device 1, and the electronic device 1 includes, for example, any of the above electronic devices. The driving method of the electronic device 1 includes: the driving controller 30 sends a first brightness instruction representing a first light-emitting brightness, the display driver integrated circuit 20 receives the first brightness instruction, and outputs a first pulse timing A to the display panel 10. The driving controller 30 sends a second brightness instruction representing a second light-emitting brightness, the display driver integrated circuit 20 receives the second brightness instruction, and outputs a second pulse timing B to the display panel 10.

[0205] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto, and any changes or substitutions within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A display driver integrated circuit, characterized in that: The display driver integrated circuit is used to drive the display panel; The display driver integrated circuit is also used for: receiving a first instruction, and outputting a first anode reset start signal and a first light emission control start signal to the display panel; in one image frame, the first anode reset start signal includes N first anode reset pulses, and the first light emission control start signal includes M*N first light emission control pulses, and each first anode reset pulse is followed by M first light emission control pulses; among the M first light emission control pulses, the width of the first W first light emission control pulses is less than the width of the remaining MW first light emission control pulses; N and W are integers greater than or equal to 1, M is an integer greater than 1, and W <M; Receive a second instruction, and output a second anode reset start signal and a second light-emitting control start signal to the display panel; in one image frame, the second anode reset start signal includes O second anode reset pulses, and the second light-emitting control start signal includes P*O second light-emitting control pulses, and each second anode reset pulse is followed by P second light-emitting control pulses; among the P second light-emitting control pulses, the width of the first Q second light-emitting control pulses is greater than the width of the remaining PQ second light-emitting control pulses; O and Q are integers greater than or equal to 1, P is an integer greater than 1, and Q <P。 2. The display driver integrated circuit according to claim 1, characterized in that: The display driver integrated circuit is also used for: After receiving the first instruction, before outputting the first light control start signal to the display panel, outputting a third light control start signal to the display panel; in one image frame, the third light control start signal includes a plurality of third light control pulses of equal width; and / or, After receiving the second instruction, before outputting the second light control start signal to the display panel, a third light control start signal is output to the display panel; in one image frame, the third light control start signal includes a plurality of third light control pulses of equal width.

3. The display driver integrated circuit according to claim 2, characterized in that: The display driver integrated circuit is further configured to output a first compensation data voltage to the display panel when the third light emitting control start signal is output to the display panel.

4. The display driver integrated circuit according to claim 2 or 3, characterized in that: The display driver integrated circuit is further configured to output a compensation initialization voltage to the display panel when the third light emission control start signal is output to the display panel.

5. The display driver integrated circuit according to any one of claims 1 to 4, characterized in that: The display driver integrated circuit is further configured to output a second compensation data voltage to the display panel when the first light emission control start signal is output to the display panel.

6. The display driver integrated circuit according to any one of claims 1 to 5, characterized in that: The first instruction includes a picture refresh instruction, which is used to drive the display panel to switch the display interface; the second instruction includes a self-refresh instruction, which is used to drive the display panel not to switch the display interface.

7. The display driver integrated circuit according to any one of claims 1 to 5, characterized in that: The display driver integrated circuit receives the first instruction to enter the first mode, and receives the second instruction to enter the second mode; the first mode includes a dark mode, and the second mode includes a light mode; the dark mode represents a display mode in which the background of the display panel is dark and the text is light, and the light mode represents a display mode in which the background of the display panel is light and the text is dark.

8. The display driver integrated circuit according to claim 7, characterized in that: The first instruction includes a dark mode activation instruction, and the second instruction includes a light mode activation instruction.

9. A display module, characterized in that: The display module comprises a display driver integrated circuit and a display panel, wherein the display driver integrated circuit is coupled to the display panel; the display driver integrated circuit comprises the display driver integrated circuit according to any one of claims 1 to 8.

10. An electronic device, characterized in that: The electronic device comprises a driving controller and a display module, wherein the display module is coupled to the driving controller; the display module comprises the display module according to claim 9.

11. The electronic device according to claim 10, characterized in that: The first instruction includes a picture refresh instruction, and the display panel receives the first light emission control start signal and switches from the first display interface to the second display interface; The second instruction includes a self-refresh instruction, and the display panel receives the second light emission control start signal and maintains the third display interface.

12. The electronic device according to claim 10, characterized in that: The first instruction includes a dark mode start instruction, the display panel receives the first light control start signal, and the display interface enters the dark mode; the second instruction includes a light mode start instruction, the display panel receives the second light control start signal, and the display interface enters the light mode.

13. A display driver integrated circuit, characterized in that: The display driver integrated circuit is used to drive the display panel; The display driver integrated circuit is also used for: receiving a first brightness instruction representing a first light-emitting brightness, and outputting a first reset start signal and a first light-emitting control start signal to the display panel; receiving a second brightness instruction representing a second light-emitting brightness, and outputting a second reset start signal and a second light-emitting control start signal to the display panel; Wherein, the first light emitting brightness is less than the set brightness, and the second light emitting brightness is greater than or equal to the set brightness; f1 is the frequency of the first reset start signal, f2 is the frequency of the second reset start signal, f3 is the frequency of the first light control start signal, and f4 is the frequency of the second light control start signal; f1 <f2,f3≦f4,f1≦f3,f2≦f4。 14. The display driver integrated circuit according to claim 13, characterized in that: f2=n*360HZ, n is a positive integer.

15. The display driver integrated circuit according to claim 13 or 14, characterized in that: The display panel includes an array substrate and a plurality of light emitting devices arranged on the array substrate; The light emitting device comprises a first electrode layer, a first light emitting layer, a conductive connection layer, a second light emitting layer and a second electrode layer which are sequentially arranged on the array substrate.

16. A display module, characterized in that: The display module includes a display driver integrated circuit and a display panel, and the display driver integrated circuit is coupled to the display panel; the display driver integrated circuit includes the display driver integrated circuit according to any one of claims 13-15.

17. An electronic device, characterized in that: The electronic device includes a driving controller and a display module, and the display module is coupled to the driving controller; the display module includes the display module described in claim 16.

18. A method for driving an electronic device, characterized in that: The electronic device comprises a drive controller, a display drive integrated circuit and a display panel; The driving method comprises: The drive controller sends a first instruction; the display drive integrated circuit receives the first instruction, and outputs a first anode reset start signal and a first light control start signal to the display panel; in an image frame, the first anode reset start signal includes N first anode reset pulses, and the first light control start signal includes M*N first light control pulses, and each first anode reset pulse corresponds to M first light control pulses; among the M first light control pulses, the width of the first W first light control pulses is less than the width of the remaining MW first light control pulses; N and W are integers greater than or equal to 1, M is an integer greater than 1, and W <M; The drive controller sends and receives a second instruction; the display drive integrated circuit receives the second instruction, and outputs a second anode reset start signal and a second light-emitting control start signal to the display panel; in an image frame, the second anode reset start signal includes O second anode reset pulses, and the second light-emitting control start signal includes P*O second light-emitting control pulses, and each second anode reset pulse is followed by P second light-emitting control pulses; among the P second light-emitting control pulses, the width of the first Q second light-emitting control pulses is greater than the width of the remaining PQ second light-emitting control pulses; O and Q are integers greater than or equal to 1, P is an integer greater than 1, and Q <P。 19. The driving method according to claim 18, characterized in that: The driving method further includes: After the display driver integrated circuit receives the first instruction, before outputting the first light-emitting control start signal to the display panel, the display driver integrated circuit outputs a third light-emitting control start signal to the display panel; in one image frame, the third light-emitting control start signal includes a plurality of third light-emitting control pulses of equal width; and / or, After the display driver integrated circuit receives the second instruction, before outputting the first light-emitting control start signal to the display panel, the display driver integrated circuit outputs a third light-emitting control start signal to the display panel; in an image frame, the third light-emitting control start signal includes multiple third light-emitting control pulses of equal width.

20. The driving method according to claim 19, characterized in that: The driving method further includes: when the display driver integrated circuit outputs the third light emission control start signal to the display panel, the display driver integrated circuit also outputs a first compensation data voltage to the display panel.

21. The driving method according to claim 19 or 20, characterized in that: The driving method further includes: when the display driver integrated circuit outputs the third light emission control start signal to the display panel, the display driver integrated circuit also outputs a compensation initialization voltage to the display panel.

22. The driving method according to any one of claims 18 to 21, characterized in that: The driving method further includes: when the display driver integrated circuit outputs the first light emission control start signal to the display panel, the display driver integrated circuit also outputs a second compensation data voltage to the display panel.

23. A method for driving an electronic device, characterized in that: The electronic device comprises a drive controller, a display drive integrated circuit and a display panel; The driving method comprises: The drive controller sends a first brightness instruction representing a first light-emitting brightness, and the display drive integrated circuit outputs a first reset start signal and a first light-emitting control start signal to the display panel according to the first brightness instruction; The drive controller sends a second brightness instruction representing a second light emitting brightness, and the display drive integrated circuit outputs a second reset start signal and a second light emitting control start signal to the display panel according to the second brightness instruction; Wherein, the first light emitting brightness is less than the set brightness, and the second light emitting brightness is greater than or equal to the set brightness; f1 is the frequency of the first reset start signal, f2 is the frequency of the second reset start signal, f3 is the frequency of the first light control start signal, and f4 is the frequency of the second light control start signal; f1 <f2,f3≦f4,f1≦f3,f2≦f4。 24. The driving method according to claim 23, characterized in that: f2=n*360HZ, n is a positive integer.

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