Display driver integrated circuit, display module, electronic device and driving method thereof

Abstract

Embodiments of the present application provide a display driving integrated circuit, a display module, an electronic device and a driving method thereof, and relate to the technical field of electronics, and are used for improving the display effect of an OLED display panel with a multi-light-emitting-layer structure at a low gray scale. The display driving integrated circuit is configured to receive a first brightness instruction representing low brightness, output a first reset start signal and a first light-emitting control start signal to a display panel, receive a second brightness instruction representing high brightness, and output a second reset start signal and a second light-emitting control start signal to the display panel. The display driving integrated circuit outputs different driving time sequences at different brightnesses. By increasing the frequency of the first reset start signal at low brightness, the number of resets of a light-emitting device in the display panel can be increased, thereby increasing the peak current of the light-emitting device at low display brightness and solving the problem of display trailing at a low brightness scene. Meanwhile, by reducing the frequency of the second reset start signal at high display brightness, the display power consumption can be reduced.

Description

Technical Field

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

[0002] With the development of display panel technology, display panels are gradually evolving towards higher brightness. Taking organic light-emitting diode (OLED) display panels as an example, in order to achieve higher brightness, the structure of OLED display panels has gradually evolved from a single-emitting-layer structure to a multi-emitting-layer structure. Under the same power consumption, OLED display panels with multi-emitting-layer structures can achieve higher brightness. At the same brightness, OLED display panels with multi-emitting-layer structures can effectively reduce power consumption.

[0003] However, OLED display panels with multi-emitting-layer structures generally suffer from poor low-grayscale display performance. Summary of the Invention

[0004] This application provides a display driver integrated circuit, a display module, an electronic device, and a driving method thereof, for improving the display effect of OLED display panels with multi-emitting-layer structures at low grayscale.

[0005] A first aspect of this application provides a display driver integrated circuit (ICC) for driving a display panel. The ICC is further configured to: receive a first brightness command characterizing a first luminance, and output a first reset start signal and a first luminance control start signal (a first pulse timing sequence) to the display panel; receive a second brightness command characterizing a second luminance, and output a second reset start signal and a second luminance control start signal (a second pulse timing sequence) to the display panel. Wherein, the first luminance is less than a first set brightness, and the second luminance is greater than the first 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 luminance control start signal, and f4 is the frequency of the second luminance control start signal; f3 is greater than or equal to f4, f1 is less than or equal to f3, and f2 is less than or equal to f4. Furthermore, f1 is greater than f2, or, when f1 is greater than or equal to 720 Hz, f1 is equal to f2.

[0006] The display driver integrated circuit provided in this application provides different driving timing sequences for low-brightness and high-brightness scenarios, driving the display panel with different timing sequences. In low-brightness scenarios, the display driver integrated circuit outputs a high-frequency first reset start signal, increasing the number of anode resets of the light-emitting devices in the display panel. Taking a light-emitting device comprising two light-emitting layers as an example, resetting the anode of the light-emitting device is equivalent to completely discharging the residual current in the first and second parasitic capacitors, which are equivalent to the two light-emitting layers, clearing the duty cycle corresponding to the residual current. Average current = on-time * on-time current; after clearing the residual duty cycle, the on-time decreases. Under the same average current, a decrease in on-time leads to an increase in the on-time current (increased peak current). That is, the charging current of the first and second parasitic capacitors increases. The larger the charging current (peak current), the smaller the time difference between the charging completion of the first and second parasitic capacitors, and the shorter the duration of excessive brightness, thereby improving the display ghosting problem in low-brightness scenarios. Meanwhile, in high-brightness scenarios, since the ghosting problem is negligible, the display driver integrated circuit outputs a low-frequency second reset start signal. This approach aims to reduce the power consumption of electronic devices while addressing the ghosting problem. Furthermore, since the frequency of the first reset start signal is less than or equal to the frequency of the first light emission control start signal, an increase in the frequency of the first reset start signal simultaneously increases the frequency of the first light emission control start signal. This results in a larger peak current (peak brightness) for the light-emitting device while reducing the interval between adjacent light emission events. This improves both the ghosting problem and flicker issues, thereby enhancing display quality. Therefore, the display driver integrated circuit provided in this application, when applied to electronic devices, can simultaneously optimize issues related to ghosting, flicker, image quality, and power consumption.

[0007] In one possible implementation, if f1 is greater than f2, then f1 is greater than or equal to 720 Hz. That is, within one image frame, the first reset start signal must appear at least six times at a low level. In other words, within one image frame, the anode of the light-emitting device must be reset at least six times. This ensures the improvement of the display panel ghosting problem.

[0008] In one possible implementation, if f1 is greater than f2, then f2 is greater than or equal to 360Hz. This ensures that the anode of the light-emitting device is reset at least three times to guarantee high brightness, making the ghosting problem of the display panel negligible and reducing the power consumption of the electronic device.

[0009] In one possible implementation, the first set brightness value ranges from 10 nits to 200 nits. By appropriately selecting a value for the first set brightness, the ghosting problem in electronic devices can be improved while also considering the power consumption of the electronic devices.

[0010] In one possible implementation, the display driver integrated circuit is further configured to: receive a third brightness command characterizing a third luminance, and output a third reset start signal and a third luminance control start signal (a third pulse timing sequence) to the display panel; wherein the third luminance is less than a first set brightness and less than the first luminance; the duty cycle of the first luminance control start signal is greater than the duty cycle of the third luminance control start signal; f5 is equal to f1, f5 is less than or equal to f6, f5 is the frequency of the third reset start signal, and f6 is the frequency of the third luminance control start signal.

[0011] Average current = on-time * current at on-time. Therefore, if the duty cycle of the first light-emitting control start signal is greater than that of the third light-emitting control start signal, the on-time of the first light-emitting control start signal is greater than that of the third light-emitting control start signal. Consequently, the peak current of the light-emitting device when executing the first pulse timing sequence is less than that when executing the third pulse timing sequence. That is, the charging voltage across the light-emitting device when executing the first pulse timing sequence is less than that when executing the third pulse timing sequence. A higher charging voltage results in higher power consumption. Therefore, if both the first and third pulse timing sequences can optimize the display ghosting problem in low-brightness scenarios, increasing the duty cycle of the light-emitting control start signal can reduce the power consumption of the electronic device. Conversely, a higher peak current results in better improvement of ghosting, screen flicker, and image quality in low-brightness scenarios. Therefore, if both the first and third pulse timing sequences can optimize the display ghosting problem in low-brightness scenarios, decreasing the duty cycle of the light-emitting control start signal can improve the improvement of ghosting, screen flicker, and image quality in low-brightness scenarios. Therefore, when the display driver integrated circuit has the ability to output the first pulse timing sequence and the third pulse timing sequence, the problems of ghosting, screen flickering, image quality and power consumption of electronic devices can be further optimized.

[0012] In one possible implementation, the first luminance is the luminance of a first luminance range, and the third luminance is the luminance of a second luminance range. All luminance values ​​within the first luminance range are processed using the first pulse timing sequence, rather than each luminance value requiring a different pulse timing sequence. This reduces the number of pulse timing sequence types and simplifies the driving logic.

[0013] In one possible implementation, the display panel includes an array substrate and multiple light-emitting devices disposed on the array substrate; each light-emitting device 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 disposed on the array substrate. Display driver integrated circuits provide a more significant improvement in the display effect of multi-layer light-emitting devices.

[0014] A second aspect of the embodiments of this application provides a display module, the display module including a display driver integrated circuit and a display panel, the display driver integrated circuit being coupled to the display panel; the display driver integrated circuit includes any of the display driver integrated circuits of the first aspect.

[0015] The display module provided in the second aspect of the embodiments of this application includes the display driver integrated circuit of any one of the first aspects, and its beneficial effects are the same as those of the display driver integrated circuit, which will not be repeated here.

[0016] A third aspect of this application provides an electronic device, comprising a drive controller, a display driver integrated circuit, and a display panel, wherein the display driver integrated circuit is coupled to both the drive controller and the display panel; the display driver integrated circuit includes any of the display driver integrated circuits of the first aspect, and the drive controller is configured to send a first brightness command and a second brightness command to the display driver integrated circuit. And / or, the drive controller is configured to receive initial image data and output compensated image data to the display driver integrated circuit; the display driver integrated circuit is configured to perform digital-to-analog conversion on the compensated image data and output the converted compensated image data to the display panel. In the electronic device provided by this application, after receiving the initial image data, the drive controller compensates for the initial image data regardless of whether the electronic device is in a low-brightness or high-brightness scene, and outputs compensated image data to the display driver integrated circuit to effectively improve problems such as uneven display, uneven graininess, screen flicker, and image quality in the electronic device. Based on image data compensation, the electronic device can improve display ghosting in low-brightness scenes, improve screen flicker, enhance display quality, and reduce power consumption by adjusting the timing in low-brightness and high-brightness scenes.

[0017] A fourth aspect of this application provides a driving method for an electronic device. The electronic device includes a driving controller, a display driving integrated circuit, and a display panel. The driving method includes: the display driving integrated circuit receiving a first brightness command representing a first luminous intensity, and outputting a first reset start signal and a first luminous intensity control start signal to the display panel; the display driving integrated circuit receiving a second brightness command representing a second luminous intensity, and outputting a second reset start signal and a second luminous intensity control start signal to the display panel; wherein the first luminous intensity is less than a first set brightness, and the second luminous intensity is greater than the first 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 luminous intensity control start signal, and f4 is the frequency of the second luminous intensity control start signal; f3 is greater than or equal to f4, f1 is less than or equal to f3, and f2 is less than or equal to f4; and f1 is greater than f2, or f1 is greater than or equal to 720 Hz and f1 is equal to f2. And / or, the driving controller receives initial image data and outputs compensated image data to the display driving integrated circuit; the display driving integrated circuit performs digital-to-analog conversion on the compensated image data and outputs the converted compensated image data to the display panel.

[0018] In one possible implementation, based on the display driver integrated circuit receiving the first brightness command and the second brightness command, the driving method further includes: the display driver integrated circuit receiving the third brightness command characterizing the third luminous brightness, and outputting a third reset start signal and a third luminous control start signal to the display panel; wherein the third luminous brightness is less than the first set brightness and less than the first luminous brightness; the duty cycle of the first luminous control start signal is greater than the duty cycle of the third luminous control start signal; f5 is equal to f1, f5 is less than or equal to f6, f5 is the frequency of the third reset start signal, and f6 is the frequency of the third luminous control start signal.

[0019] A fifth aspect of this application provides an electronic device, which includes a drive controller, a display driver integrated circuit, and a display panel, wherein the display driver integrated circuit is coupled to both the drive controller and the display panel. The display driver integrated circuit includes any of the display driver integrated circuits described in the first aspect. The drive controller is configured to send a first brightness command and a second brightness command to the display driver integrated circuit. And / or, the drive controller is configured to: receive first initial image data and a first compensation command matching a fourth luminous intensity, and output first compensated image data to the display driver integrated circuit; receive second initial image data and a second compensation command matching a fifth luminous intensity, and output first uncompensated image data to the display driver integrated circuit; wherein the fourth luminous intensity is less than a second set brightness, the fifth luminous intensity is greater than a third set brightness, and the third set brightness is greater than or equal to the second set brightness.

[0020] In the electronic device provided in this application embodiment, after receiving initial image data, if the drive controller simultaneously receives a first compensation instruction matching low luminous brightness (fourth luminous brightness), the drive controller executes a compensation scheme for the initial image data and outputs the compensated image data to the drive integrated circuit. However, if the drive controller simultaneously receives a second compensation instruction matching high luminous brightness (fifth luminous brightness), the drive controller executes a no-compensation scheme for the initial image data and outputs uncompensated image data to the drive integrated circuit. Therefore, after receiving the initial image data, the drive controller performs compensation processing on low-brightness images requiring depth compensation to improve problems such as uneven low-grayscale display and uneven low-grayscale graininess in the electronic device 1. However, the drive controller does not perform compensation processing on high-brightness images without high compensation requirements to reduce the power consumption of the electronic device. If the display drive integrated circuit further switches the pulse timing for different brightness levels to improve the ghosting problem, the display effect and power consumption of the electronic device can both reach a superior level.

[0021] In one possible implementation, the display driver integrated circuit is used to output second uncompensated image data to the display panel based on the first uncompensated image data. In high-brightness scenarios, there is no need to compensate the image data, which can reduce the power consumption of the electronic device and simplify its logic.

[0022] In one possible implementation, after receiving the second initial image data and the second compensation instruction, the drive controller is further configured to output a first auxiliary compensation instruction to the display driver integrated circuit; the display driver integrated circuit is configured to output second compensated image data to the display panel based on the first auxiliary compensation instruction and the first uncompensated image data. In high-brightness scenarios where compensation is not critical, image data can be compensated using the display driver integrated circuit. The processing scheme of the display driver integrated circuit is relatively simple and consumes less power than that of the drive controller. Therefore, in high-brightness scenarios, using the display driver integrated circuit to compensate image data can optimize the display effect while reducing the power consumption of the electronic device.

[0023] In one possible implementation, the third set brightness is greater than the second set brightness; the drive controller is further configured to: receive third initial image data and a third compensation instruction matching the sixth luminous brightness, and output third compensated image data and a second auxiliary compensation instruction to the display driver integrated circuit; the display driver integrated circuit is configured to receive the third compensated image data and the second auxiliary compensation instruction, and output fourth compensated image data to the display panel; wherein, the sixth luminous brightness is greater than the second set brightness and less than the third set brightness. In intermediate brightness scenarios, both the drive controller and the display driver integrated circuit perform a certain degree of compensation on the image data, which can realize the transition from compensation by the drive controller only in low brightness scenarios to compensation by the display driver integrated circuit only in high brightness scenarios, realizing the transition between the two compensation schemes, making the display effect transition smoothly, and further optimizing the display effect.

[0024] In one possible implementation, the drive controller is further configured to: receive fourth initial image data and a fourth compensation instruction matching the seventh luminous intensity, and output fifth compensated image data and a third auxiliary compensation instruction to the display driver integrated circuit; the display driver integrated circuit is configured to receive the fifth compensated image data and the third auxiliary compensation instruction, and output sixth compensated image data to the display panel; wherein the seventh luminous intensity is greater than the sixth luminous intensity and less than the third set brightness; the compensation coefficient of the drive controller for the fourth initial image data is less than the compensation coefficient of the drive controller for the third initial image data; the compensation coefficient of the display driver integrated circuit for the fifth compensated image data is greater than the compensation coefficient of the display driver integrated circuit for the third compensated image data. In intermediate brightness scenarios, both the drive controller and the display driver integrated circuit compensate for the image data to a certain extent, and as the brightness gradually increases, the degree of compensation of the image data by the display driver integrated circuit gradually increases, until entering the high brightness scenario, where only the display driver integrated circuit compensates for the image data. This gradual switching between the two compensation schemes results in a smooth transition in the display effect, further optimizing the display effect.

[0025] In one possible implementation, the first set brightness is greater than the third set brightness. Alternatively, the first set brightness is less than the second set brightness. That is, the first set value does not fall between the second and third set values. Therefore, when the electronic device interchanges the first and second pulse timing sequences, the compensation scheme executed by the electronic device is either only driver controller compensation or only display driver integrated circuit compensation; the compensation scheme is a single and stable one. In other words, the compensation scheme does not switch during pulse timing sequence switching, reducing other variables of the electronic device during pulse timing sequence switching, thereby optimizing the display effect variation caused by pulse timing changes.

[0026] In one possible implementation, the display panel includes an array substrate and multiple light-emitting devices disposed on the array substrate. Each light-emitting device 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 disposed on the array substrate. The first and second light-emitting layers emit light of the same color. When the light-emitting devices in the display panel include multiple light-emitting layers, issues such as ghosting, flickering, image quality, and power consumption in electronic devices can be optimized.

[0027] A sixth aspect of this application provides a driving method for an electronic device, the electronic device including a display driver integrated circuit and a display panel; the driving method includes: the display driver integrated circuit receiving a first brightness command characterizing a first luminous intensity, and outputting a first reset start signal and a first luminous intensity control start signal to the display panel; the display driver integrated circuit receiving a second brightness command characterizing a second luminous intensity, and outputting a second reset start signal and a second luminous intensity control start signal to the display panel; wherein the first luminous intensity is less than a first set brightness, and the second luminous intensity is greater than the first 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 luminous intensity control start signal, and f4 is the frequency of the second luminous intensity control start signal; f3 is greater than or equal to f4, f1 is less than or equal to f3, and f2 is less than or equal to f4. Furthermore, f1 is greater than f2, or f1 is greater than or equal to 720 Hz and f1 is equal to f2. And / or, the drive controller receives first initial image data and a first compensation instruction matching a fourth luminous intensity, and outputs first compensated image data to the display driver integrated circuit; the drive controller receives second initial image data and a second compensation instruction matching a fifth luminous intensity, and outputs first uncompensated image data to the display driver integrated circuit; the fourth luminous intensity is less than a second set brightness, the fifth luminous intensity is greater than a third set brightness, and the third set brightness is greater than or equal to the second set brightness. The beneficial effects of the driving method for the electronic device provided in the sixth aspect of this application are the same as those of the electronic device provided in the fifth aspect, and will not be repeated here.

[0028] In one possible implementation, based on the display driver integrated circuit receiving the first brightness command and the second brightness command, the driving method further includes: the display driver integrated circuit receiving the third brightness command characterizing the third luminous brightness, and outputting a third reset start signal and a third luminous control start signal to the display panel; wherein the third luminous brightness is less than the first set brightness and less than the first luminous brightness; the duty cycle of the first luminous control start signal is greater than the duty cycle of the third luminous control start signal; f5 is equal to f1, f5 is less than or equal to f6, f5 is the frequency of the third reset start signal, and f6 is the frequency of the third luminous control start signal.

[0029] In one possible implementation, after the drive controller outputs the first uncompensated image data to the display driver integrated circuit, the driving method further includes: the display driver integrated circuit outputs the second uncompensated image data to the display panel based on the first uncompensated image data.

[0030] In one possible implementation, after the drive controller receives the second initial image data and the second compensation instruction matching the fifth luminous intensity, the driving method further includes: the drive controller outputting a first auxiliary compensation instruction to the display driver integrated circuit; and the display driver integrated circuit outputting second compensated image data to the display panel according to the first auxiliary compensation instruction and the first uncompensated image data.

[0031] In one possible implementation, the third set brightness is greater than the second set brightness; the driving method further includes: the driving controller receiving third initial image data and a third compensation instruction matching the sixth luminous brightness, and outputting third compensated image data and a second auxiliary compensation instruction to the display driving integrated circuit; the display driving integrated circuit receiving the third compensated image data and the second auxiliary compensation instruction, and outputting fourth compensated image data to the display panel; wherein the sixth luminous brightness is greater than the second set brightness and less than the third set brightness.

[0032] In one possible implementation, the driving method further includes: a driving controller receiving fourth initial image data and a fourth compensation instruction matching the seventh luminous intensity, and outputting fifth compensated image data and a third auxiliary compensation instruction to a display driving integrated circuit; the display driving integrated circuit receiving the fifth compensated image data and the third auxiliary compensation instruction, and outputting sixth compensated image data to the display panel; wherein the seventh luminous intensity is greater than the sixth luminous intensity and less than the third set brightness; the compensation coefficient of the driving controller for the fourth initial image data is less than the compensation coefficient of the driving controller for the third initial image data; and the compensation coefficient of the display driving integrated circuit for the fifth compensated image data is greater than the compensation coefficient of the display driving integrated circuit for the third compensated image data. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application;

[0034] Figure 2A A schematic diagram of the topology of a pixel circuit provided in an embodiment of this application;

[0035] Figure 2B A driving timing diagram of a pixel circuit provided in an embodiment of this application;

[0036] Figure 2C This is a schematic diagram of the structure of a display panel provided in an embodiment of this application;

[0037] Figure 2DAn equivalent topological diagram of a light-emitting device provided in an embodiment of this application;

[0038] Figure 2E This is a schematic diagram of the structure of a light emission control signal generation circuit provided in an embodiment of this application;

[0039] Figure 3 This is a driving timing diagram illustrating an embodiment of the present application for a display panel;

[0040] Figure 4 A driving timing diagram for a display panel provided in an embodiment of this application;

[0041] Figure 5 A comparison chart showing the improvement of ghosting issues in different products, provided for embodiments of this application;

[0042] Figure 6 A driving timing diagram for another display panel provided in an embodiment of this application;

[0043] Figure 7 A comparison diagram of duty cycles in different pulse timings provided for embodiments of this application;

[0044] Figure 8A A schematic diagram illustrating image data compensation implemented by an electronic device according to an embodiment of this application;

[0045] Figures 8B-8D A timeline of a compensation scheme provided in an embodiment of this application;

[0046] Figure 9A A schematic diagram illustrating another electronic device implementing image data compensation according to an embodiment of this application;

[0047] Figure 9B A timeline of another compensation scheme provided in the embodiments of this application;

[0048] Figure 10 This is a schematic diagram illustrating the coordination of timing switching and compensation switching between different products, as provided in an embodiment of this application. Detailed Implementation

[0049] The technical solutions of the embodiments of this application will be described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0050] Hereinafter, the terms "second," "first," etc., are used for descriptive convenience only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "second," "first," etc., may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0051] Furthermore, in the embodiments of this application, directional terms such as "upper," "lower," "left," and "right" may be defined relative to the orientation in which the components are schematically placed in the accompanying drawings. It should be understood that these directional terms can be relative concepts, used for relative description and clarification, and can change accordingly based on the orientation of the components in the accompanying drawings.

[0052] In the embodiments of this application, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a direct connection or an indirect connection through an intermediate medium. Furthermore, the term "coupled connection" can be a direct electrical connection or an indirect electrical connection through an intermediate medium. The term "contact" can be direct contact or indirect contact through an intermediate medium.

[0053] In this embodiment of the application, "and / or" describes the relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following associated objects have an "or" relationship.

[0054] This application provides an electronic device, which may be, for example, a foldable electronic device. The electronic device may be, for example, a consumer electronics product, a home electronics product, an in-vehicle electronics product, or a financial electronics product. Consumer electronics products include mobile phones, tablets, laptops, e-readers, personal computers (PCs), personal digital assistants (PDAs), desktop monitors, smart wearable products (e.g., smartwatches, 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 electronics products include smart door locks, televisions, refrigerators, and rechargeable small household appliances (e.g., soymilk makers, robot vacuum cleaners), etc. In-vehicle electronics products include in-vehicle navigation systems, in-vehicle DVDs, etc. Financial electronics products include ATMs, self-service electronic devices, etc.

[0055] This application does not impose any special restrictions on the specific form of the above-mentioned electronic device. For the sake of convenience, the following embodiments all use mobile phones as an example for illustration.

[0056] Figure 1 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application.

[0057] like Figure 1 As shown, the electronic device 1 includes a display module 40 and a drive controller 30. In some embodiments, the electronic device 1 further includes a power management integrated circuit (PMIC). Figure 1 (Not shown in the image), the PIMC is used to supply power to the display driver integrated circuit 20 and the driver controller 30.

[0058] The drive controller 30, as the core of the electronic device 1, is used for overall system processing and control. The drive controller 30 is coupled to the display module 40 and receives image signals and control signals (e.g., provided by a central processing unit (CPU)). The drive controller 30 outputs image data that matches the interface specifications of the display module 40 based on the image signals. The drive controller 30 may include, for example, a system-on-chip (SOC). The drive controller 30 can be coupled to the display module 40 via a mobile industry processor interface (MIPI). Alternatively, the drive controller 30 can also be coupled to the display module 40 via other high-speed serial / deserial (SerDes) interfaces.

[0059] The display module 40 includes, for example, a display panel 10 and a display driver integrated circuit 20. The display driver integrated circuit 20 serves as the control core of the display panel 10, driving the display panel 10 to work and receiving data from the drive controller 30.

[0060] The display driver integrated circuit 20 is coupled to, for example, the drive controller 30, receives signals output by the drive controller 30, and provides the display panel 10 with the scanning signals and data signals required for light emission. The signals sent by the display driver integrated circuit 20 will be explained in detail below in conjunction with the structure of the pixel circuit.

[0061] For example, the display driver integrated circuit 20 receives data control signals and image data from the driver controller 30. The display driver integrated circuit 20 converts the image data into data signals and outputs the data signals to multiple data signal lines. The data signals are analog voltages corresponding to the grayscale values ​​of the image data. The display driver integrated circuit 20 is also used to output scan control signals such as clock signals, gate activation signals (STV), and reset signals required for display to the display panel 10. The display driver integrated circuit 20 may include, for example, a display driver integrated circuit (DDIC).

[0062] The display panel 10 serves as a data presentation unit, used to display and control data sent by the drive controller 30. For example, the display panel 10 may be a self-emissive 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, or a quantum dot light-emitting diode (QLED) display module 40. In this case, the display panel 10 can be a rigid display panel or a flexible display panel.

[0063] For any of the above-described 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 images and includes multiple sub-pixels (SPs). Each sub-pixel is provided with a pixel circuit 11, which receives data signals provided by the display driver integrated circuit 20. The non-display area BB includes a driving circuit, which receives scan control signals provided by the display driver integrated circuit 20.

[0064] In this application, the pixel circuits 11 are described using a matrix arrangement as an example. Pixel circuits 11 arranged in a row along the horizontal direction X are called the same row pixel circuits 11, and pixel circuits 11 arranged in a row along the vertical direction Y are called the same column pixel circuits 11.

[0065] In some embodiments, the pixel circuit 11 typically includes a driving circuit composed of multiple transistors and a light-emitting device. The driving circuit generates a driving current to drive the light-emitting device to emit light, thereby realizing the light emission of the pixel circuit 11. Multiple pixel circuits 11 are arrayed on a substrate. For example, the structure including a substrate and multiple arrayed driving circuits is called an array substrate. Multiple light-emitting devices are disposed on the array substrate, and each light-emitting device is coupled to a pixel circuit. Alternatively, the display panel 10 includes an array substrate and multiple light-emitting devices. The array substrate includes a substrate and an arrayed driving circuit, and the driving circuit and light-emitting devices are coupled to form the pixel circuit 11.

[0066] Figure 2A This is a schematic diagram of a pixel circuit topology provided in an embodiment of this application. Figure 2B This is a driving timing diagram of a pixel circuit provided in an embodiment of this application.

[0067] In some embodiments, such as 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 write and threshold compensation circuit 114, a light emission control circuit 115, and a light emission device 116. Figure 2A The pixel circuit 11 shown is merely an illustration and is not intended to be limiting.

[0068] 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-emitting 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 switching 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.

[0069] Combination Figure 2A and Figure 2B As shown, the light emission process of the pixel circuit 11 in one frame can be divided into an initialization stage t1, a threshold compensation stage t2, a light emission stage t3, and an anode reset stage t4.

[0070] During initialization phase t1:

[0071] The second control signal s2 at the second control signal terminal S2 and the third control signal s3 at the third control signal terminal S3 change from low to high and then back to low. Consequently, the fourth transistor T4 and the third transistor T3 change from off to on and then back to off. The first control signal s1 at the first control signal terminal S1, the fourth control signal s4 at the fourth control signal terminal S4, and the light emission control signal em at the light emission control signal terminal EM all remain at high levels. Therefore, the seventh transistor T7, the eighth transistor T8, the second transistor T2, the fifth transistor T5, and the sixth transistor T6 all remain off.

[0072] During initialization phase t1, the first transistor T1, the third transistor T3, and the fourth transistor T4 are turned on, enabling voltage control of the fourth node N4, the second node N2, and the first node N1. Since the third transistor T3 and the fourth transistor T4 act as switches, and 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, initialization phase t1 achieves voltage control of the control electrode of the first transistor T1, the first node N1, the second node N2, and the fourth node N4. This makes 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 the first initialization voltages of the first initialization voltage terminal Vinit1, effectively resetting the voltages of the control electrode of the first transistor T1, the first node N1, the second node N2, and the fourth node N4.

[0073] During the threshold compensation phase t2:

[0074] The first control signal s1 at the first control signal terminal S1 changes from high to low and then back to high. Consequently, the second transistor T2 changes from off to on and then back to off. The third control signal s3 at the third control signal terminal S3 changes from low to high and then back to low. Consequently, the third transistor T3 changes from off to on and then back to off. The first control signal s1 at the first control signal terminal S1 and the light emission control signal em at the light emission control signal terminal EM both remain high, while the second control signal s2 at the second control signal terminal S2 remains low. Therefore, the seventh transistor T7, the eighth transistor T8, the fifth transistor T5, the sixth transistor T6, and the fourth transistor T4 all remain off.

[0075] In the threshold compensation stage t2, the second transistor T2, the third transistor T3, and the first transistor T1 are turned on, realizing the storage of the data voltage at the data voltage terminal Vd in the storage capacitor Cst, thus completing the writing of the data voltage. This also compensates for the threshold voltage of the first transistor T1. The threshold voltage compensation process 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.

[0076] During the luminescence stage t3:

[0077] The light-emitting control signal em at the light-emitting control signal terminal EM changes from high level to low level, and then from low level to high level. Consequently, 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 at the second control signal terminal S2 and the third control signal s3 at the third control signal terminal S3 remain at low level, while the fourth transistor T4 and the third transistor T3 remain off. The first control signal s1 at the first control signal terminal S1 and the fourth control signal s4 at the fourth control signal terminal S4 remain at high level, while the seventh transistor T7, the eighth transistor T8, and the second transistor T2 remain off.

[0078] During the light-emitting stage t3, the fifth transistor T5, the first transistor T1, and the sixth transistor T6 are turned on respectively, transmitting driving current to the light-emitting device 116, and the light-emitting device 116 emits light under the drive of the driving current.

[0079] Anode reset stage t:

[0080] The first control signal s1 at the first control signal terminal S1 changes from high to low and then back to high. Consequently, the seventh transistor T7 and the eighth transistor T8 change from off to on and then back to off. The second control signal s2 at the second control signal terminal S2 and the third control signal s3 at the third control signal terminal S3 remain low. The fourth control signal s4 at the fourth control signal terminal S4 and the light emission control signal em at the light emission control signal terminal EM remain high. The third transistor T3, the fourth transistor T4, the second transistor T2, the fifth transistor T5, and the sixth transistor T6 all remain off.

[0081] During the anode reset phase 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 anode voltage of the light-emitting device 116. This makes the voltage of the second node N2 the third initialization voltage of the third initialization voltage terminal Vinit3, and the voltage of the anode of the light-emitting device 116 the second initialization voltage of the second initialization voltage terminal Vinit2, thus realizing the reset of the voltage of the second node N2 and the anode voltage of the light-emitting device 116.

[0082] When the display panel 10 is displayed at different brightness levels, the voltage received by each gate of the pixel circuit 11 in the display panel 10 is dynamically adjusted.

[0083] With the development of display panel 10 technology, display panel 10 is gradually evolving towards higher brightness. While achieving higher brightness, the power consumption of display panel 10 will also increase. The power consumption of display panel 10 mainly consists of two parts: one part is the power consumption required for the light-emitting device 116 to emit light, and the other part is the power consumption required for the display driver integrated circuit 20 to provide driving signals.

[0084] Taking OLED display panels as an example, in order to achieve higher brightness, the structure of OLED display panels has gradually evolved from a single-layer structure to a tandem structure. At the same light-emitting power consumption, the tandem structure can achieve higher brightness. At the same brightness, the tandem structure can effectively reduce light-emitting power consumption.

[0085] Figure 2C This is a schematic diagram of the structure of a display panel provided in an embodiment of this application. Figure 2D An equivalent topology diagram of a light-emitting device provided in an embodiment of this application.

[0086] In some embodiments, such as 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. 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 write and threshold compensation circuit 114, and a light-emitting control circuit 115 disposed on the substrate.

[0087] 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 disposed on an array substrate.

[0088] The first and second light-emitting layers 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. The first light-emitting layer may also include at least one of a hole injection layer, a hole transport layer, an electron blocking layer, an electron transport layer, and an electron injection layer. The organic light-emitting layer in the first and second light-emitting layers can be used to emit light of the same color or to emit light of different colors.

[0089] 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. A relatively high potential is applied to the first electrode layer, and a relatively low potential is applied to the second electrode layer. Holes are injected from the first electrode layer into the first light-emitting layer, and electrons are injected from the second electrode layer through the conductive connection layer into the first light-emitting layer. The energy generated after the holes and electrons recombine in the first light-emitting layer can excite it to emit light. Similarly, holes are injected from the first electrode layer through the conductive connection layer into the second light-emitting layer, and electrons are injected from the second electrode layer into the second light-emitting layer. The energy generated after the holes and electrons recombine in the second light-emitting layer can excite it 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 and second light-emitting layers is superimposed and emitted from the second electrode layer side.

[0090] At this time, as Figure 2D As shown, the light-emitting device 116 is equivalent to including a first sub-light-emitting device OLED1 and a second sub-light-emitting device OLED2 connected in series, with the first sub-light-emitting device OLED1 and the second sub-light-emitting device OLED2 connected in series through a conductive interconnect layer. The first sub-light-emitting device OLED1 has a first parasitic capacitance C1, and the second sub-light-emitting device OLED2 has a second parasitic capacitance C2.

[0091] 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 This is just an illustration.

[0092] The origin of the control signals received by the first control signal terminal S1, the second control signal terminal S2, the third control signal terminal S3, the fourth control signal terminal S4, and the light emission control signal terminal EM in the pixel circuit 11 will be illustrated below.

[0093] like Figure 1 As shown, in some embodiments, the display panel 10 further includes a light emission control signal generation circuit 12, which is used to transmit a light emission control signal em to the light emission control signal terminals EM of a plurality of pixel circuits 11 in the display panel 10.

[0094] Figure 2E This is a schematic diagram of a light emission control signal generation circuit provided in an embodiment of this application.

[0095] In some embodiments, such as Figure 2EAs shown, the light emission control signal generation circuit 12 includes at least two 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 emission 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 its previous stage shift register RS(m-1). When the light emission control start signal STV-em is an on signal, the first-stage shift register RS1 of the light emission control signal generation circuit 12 starts working, and subsequently, the multi-stage shift registers start working one after another.

[0096] 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.

[0097] Similarly, in some embodiments, the display panel 10 further includes a first control signal generation circuit (or can be understood as an anode reset control signal generation circuit) 13, which is used to transmit a first control signal s1 for each row of pixel circuits 11. The reset start signal STV-s1 required by the first control signal generation 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.

[0098] The display panel 10 also includes a second control signal generation circuit 14, which transmits a second control signal s2 to each row of pixel circuits 11. The initialization start signal STV-s2 required by the second control signal generation 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.

[0099] The display panel 10 also includes a third control signal generation circuit 15, which transmits a third control signal s3 to each row of pixel circuits 11. The compensation start signal STV-s3 required by the third control signal generation 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.

[0100] The display panel 10 also includes a fourth control signal generation circuit 16, which transmits a fourth control signal s4 to each row of pixel circuits 11. The write start signal STV-s4 required by the fourth control signal generation 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.

[0101] Therefore, the display state of the display panel 10 can be adjusted 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 write start signal STV-s4.

[0102] Figure 3 This is a driving timing diagram illustrating an embodiment of the present application for a display panel.

[0103] In some embodiments, the driving timing of the display panel 10 will be changed accordingly under different brightness levels.

[0104] like Figure 3 As shown, under high brightness, a reduced effective pulse charge (low-level signal) emission control start signal STV-em is used in one frame, with a frequency of 3*120Hz. Under high brightness, the difference in drive current between different high-brightness levels is significant. The emission brightness can be adjusted by changing the magnitude of the drive current. This is generally referred to as direct current (DC) dimming or DC-like dimming mode.

[0105] like Figure 3 As shown, in low brightness, the emission control start signal STV-em in one frame includes multiple effective pulse charges (low-level signals), and the frequency of the emission control start signal STV-em is 12*120Hz. This is generally referred to as pulse width modulation (PWM) dimming mode. In low brightness mode, the difference in drive current between different low brightness levels is relatively small, making it difficult to adjust the emission brightness simply by relying on the magnitude of the drive current. At this time, it is necessary to combine the duty cycle of the emission control start signal STV-em to improve the differentiation of the drive current and achieve the differentiation of low brightness levels. Average current = on-time * current at on-time. With a fixed average current, by reducing the duty cycle of the emission control start signal STV-em, the on-time is shortened, which increases the current at on-time. The larger the current at on-time, the more accurate the precision control, thereby differentiating different low emission brightness levels and improving display quality. At the same time, with a fixed duty cycle, by increasing the number (frequency) of effective pulse charges of the emission control start signal STV-em, the interval between two adjacent emission times can be reduced, improving the flickering problem.

[0106] In both low brightness (PWM dimming mode) and high brightness (DC dimming mode) conditions, the frequencies of the reset start signal STV-s1, initialization start signal STV-s2, compensation start signal STV-s3, and write start signal STV-s4 remain consistent and are not adjusted. For example, Figure 3 The timing of the reset start signal STV-s1 is shown in the figure. Under both low and high brightness conditions, the frequency of the reset start signal STV-s1 is 3*120HZ (the number of effective pulse charge (low level signal) is 3).

[0107] Through the above driving method, high brightness and low power consumption light emission of the light-emitting device 116, which includes the first sub-light-emitting device OLED1 and the second sub-light-emitting device OLED2 connected in series, can be achieved.

[0108] However, since the light-emitting device 116 includes a first sub-light-emitting device OLED1 and a second sub-light-emitting device OLED2 connected in series, it is equivalent to the light-emitting device 116 including a first parasitic capacitor C1 and a second parasitic capacitor C2 connected in series. When there is a difference in capacitance between the first parasitic capacitor C1 and the second parasitic capacitor C2, during the light-emitting stage, the parasitic capacitor with the smaller rechargeable capacity completes charging and emits light earlier, resulting in a larger luminous current for the corresponding light-emitting device and excessive brightness. The greater the difference in rechargeable capacity between the first parasitic capacitor C1 and the second parasitic capacitor C2, the longer the duration of excessive brightness and the brighter the apparent brightness difference. During initial fabrication, it is difficult to completely resolve the differences between the first parasitic capacitor C1 and the second parasitic capacitor C2 in the light-emitting device 116 through design and manufacturing processes. Furthermore, it is impossible to predict the potential differences between the first parasitic capacitor C1 and the second parasitic capacitor C2 during subsequent use. The brightness difference between the first sub-light-emitting device OLED1 and the second sub-light-emitting device OLED2 will cause a severe ghosting problem in the display panel 10 during display. Furthermore, in low-brightness scenarios, the peak current of the light-emitting device is smaller, and after shunting, the current charging the first parasitic capacitor C1 and the second parasitic capacitor C2 is even smaller. With a fixed difference in the rechargeable capacity of the first parasitic capacitor C1 and the second parasitic capacitor C2, the smaller the charging current, the greater the difference in charging time between the two, resulting in a longer duration of excessive brightness and exacerbating the ghosting phenomenon in low-brightness conditions. Moreover, display panels 10, including the aforementioned light-emitting device 116, generally suffer from uneven low-grayscale display, uneven "dirty mura" effect, severe flicker, and high power consumption.

[0109] Based on this, an electronic device 1 is provided in this application embodiment. The electronic device 1 includes the above-mentioned display panel 10, display driver integrated circuit 20 and driver controller 30, which is used to improve the problem of display ghosting under low brightness, and can also improve the problems of uneven low grayscale display, uneven dirt mura, severe flicker and high power consumption.

[0110] Figure 4 This is a driving timing diagram for a display panel provided in an embodiment of this application.

[0111] This application provides a display driver integrated circuit 20, which is applied in the electronic device 1 provided in this application to drive the display panel 10 in the electronic device 1.

[0112] The display driver integrated circuit 20 is also used to receive a first brightness command characterizing a first luminance, and output to the display panel 10 such as... Figure 4 The first reset start signal STV-s11 and the first light emission control start signal STV-em1 are shown.

[0113] The display driver integrated circuit 20 is also used to receive a second brightness command characterizing a second luminance, and output such a command to the display panel 10. Figure 4 The second reset start signal STV-s12 and the second light emission control start signal STV-em2 are shown.

[0114] The first luminous brightness is less than the first set brightness, and the second luminous brightness is greater than the first set brightness. The first luminous brightness can be understood as the brightness in low brightness mode, and the second luminous brightness can be understood as the brightness in high brightness mode. The first set brightness is the critical dividing value between low brightness and high brightness. In the embodiments of this application, the values ​​of the first set brightness and the second set brightness are not limited.

[0115] The first brightness command and the second brightness command can be provided, for example, by the drive controller 30 in the electronic device 1. For instance, when a user (or CPU) adjusts the brightness bar of the electronic device 1, the drive controller 30 determines the brightness requirement based on the touch position.

[0116] When the brightness requirement is less than a first set value, the drive controller 30 sends a first brightness command to the display driver integrated circuit 20. The display driver integrated circuit 20 receives the first command and issues a first pulse timing sequence A, including a first reset start signal STV-s11 and a first light emission control start signal STV-em1.

[0117] When the brightness requirement exceeds the first set value, the drive controller 30 sends a second brightness command to the display driver integrated circuit 20. The display driver integrated circuit 20 receives the second command and issues a second pulse timing sequence B, which includes a second reset start signal STV-s12 and a second light emission control start signal STV-em2.

[0118] The type of pulse timing sent by the display driver integrated circuit 20 matches the interface type of the display panel 10. For example, if the display panel 10 and the display driver integrated circuit 20 are coupled via a MIPI interface, the type of pulse timing sent by the display driver integrated circuit 20 must satisfy the data protocol of the MIPI interface.

[0119] 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.

[0120] For example, such as Figure 4 As shown, the frequency f3 of the first light emission control start signal STV-em1 is greater than the frequency f4 of the second light emission control start signal STV-em2. Increasing the frequency of the light emission control signal em in low-brightness scenarios improves the flickering problem. In high-brightness scenarios, decreasing the frequency of the light emission control signal em, without affecting the display effect, can reduce the power consumption of the display driver integrated circuit 20.

[0121] Alternatively, for example, the frequency f3 of the first light emission control start signal STV-em1 is equal to the frequency f4 of the second light emission control start signal STV-em2. The frequency of the light emission control signal em remains consistent in both low-brightness and high-brightness scenarios, eliminating the need for the display driver integrated circuit 20 to change frequencies in different scenarios, thus simplifying its structure.

[0122] Optionally, the frequency f3 of the first light emission control start signal STV-em1 is equal to 12*120HZ (1440HZ). By increasing the frequency f3 of the first light emission control start signal STV-em1, the interval between two adjacent light emission events can be reduced, thus improving the screen flickering problem.

[0123] As described above regarding the driving method of pixel circuit 11, during the anode reset phase t, the anode reset circuit 111 is turned on, and the light emission control circuit 115 must remain off. Figure 2AIn the pixel circuit 11, when the first control signal s1 is a low-level enable signal, the light-emitting control signal em needs to be a high-level disable signal. Therefore, before the first control signal s1 goes low, the light-emitting control signal em needs to go high. That is, the number of times the light-emitting control signal em goes high must be greater than or equal to the number of times the first control signal s1 goes low. In other words, 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.

[0124] For example, 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. By satisfying the frequency f1 requirement of the first reset start signal STV-s11 with the minimum frequency f3, the power consumption of the display driver integrated circuit 20 can be reduced.

[0125] Or, for example, such as Figure 4 As shown, the frequency f1 of the first reset start signal STV-s11 is less than the frequency f3 of the first light emission control start signal STV-em1. While meeting the requirement of the frequency f1 of the first reset start signal STV-s11, increasing the frequency f3 of the first light emission control start signal STV-em1 can further optimize the screen flickering problem in low-brightness scenarios.

[0126] 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.

[0127] In some embodiments, the frequency f1 of the first reset start signal STV-s11 is greater 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 scenario is greater than the number of times the anode of the light-emitting device is reset in a high-brightness scenario, thus increasing the number of times the anode of the light-emitting device is reset in a low-brightness scenario.

[0128] For example, the frequency f1 of the first reset start signal STV-s11 is greater than or equal to 6 * 120 Hz (720 Hz). That is, within one image frame, the first reset start signal STV-s11 must exhibit a low-level on-state signal at least 6 times. In other words, within one image frame, the anode of the light-emitting device must be reset at least 6 times. For example, the frequency f1 of the first reset start signal STV-s11 can be 720 Hz, 1080 Hz, or 1440 Hz, etc., to ensure an improvement in the ghosting problem of the display panel 10 in low-brightness scenes.

[0129] For example, the frequency f2 of the second reset start signal STV-s12 is greater than or equal to 3 * 120 Hz (360 Hz). That is, within one image frame, the second reset start signal STV-s12 must exhibit a low-level on signal at least three times. In other words, within one image frame, the anode of the light-emitting device must reset at least three times. For example, the frequency f2 of the second reset start signal STV-s12 can be 360 ​​Hz, 720 Hz, or 1080 Hz, etc. This ensures that in high-brightness scenes, the anode of the light-emitting device resets at least three times, the ghosting problem of the display panel 10 can be ignored, and the power consumption of the electronic device 1 is reduced.

[0130] In this embodiment, the widths of the low-level pulses in the first reset start signal STV-s11 can be completely equal, not completely equal, or completely unequal. The widths of the low-level pulses in the second reset start signal STV-s12 can be completely equal, not completely equal, or completely unequal. The widths of the low-level pulses in the first light emission control start signal STV-em1 can be completely equal, not completely equal, or completely unequal. The widths of the low-level pulses in the second light emission control start signal STV-em2 can be completely equal, not completely equal, or completely unequal.

[0131] The display driver integrated circuit 20 provided in this application embodiment outputs different driving timing sequences in low-brightness and high-brightness scenarios to drive the display panel 10 with different timing sequences. In low-brightness scenarios, the display driver integrated circuit 20 outputs a high-frequency first reset start signal STV-s11, increasing the number of anode resets of the light-emitting device. The anode reset of the light-emitting device is equivalent to completely discharging the residual current in the first parasitic capacitor C1 and the second parasitic capacitor C2, clearing the duty cycle corresponding to the residual current. Average current = on-time * current at on-time. After the residual duty cycle is cleared, the on-time decreases. Under the same average current, the on-time decreases, and the current at on-time increases (peak current increases). That is, the charging current of the first parasitic capacitor C1 and the second parasitic capacitor C2 increases. The larger the charging current (peak current), the smaller the time difference between the completion of charging of the first parasitic capacitor C1 and the second parasitic capacitor C2, and the shorter the duration of overbrightness, thereby improving the display ghosting problem in low-brightness scenarios. Meanwhile, in high-brightness scenarios, since the ghosting problem is negligible, the display driver integrated circuit 20 outputs a low-frequency second reset start signal STV-s12. This reduces the power consumption of the electronic device 1 while solving the ghosting problem. Furthermore, since the frequency f1 of the first reset start signal STV-s11 is less than or equal to the frequency f3 of the first light emission control start signal STV-em1, the frequency f3 of the first light emission control start signal STV-em1 also increases as the frequency f1 of the first reset start signal STV-s11 increases. This results in a larger peak current (peak brightness) for the light-emitting device 116 while reducing the interval between adjacent light emission events. This improves both the ghosting problem and the flicker problem, enhancing display quality. Therefore, the display driver integrated circuit 20 provided in this embodiment can simultaneously optimize the ghosting, flicker, image quality, and power consumption of the electronic device 1.

[0132] In other embodiments, the frequency f1 of the first reset start signal STV-s11 is equal to the frequency f2 of the second reset start signal STV-s12, and the frequency f1 of the first reset start signal STV-s11 is greater than or equal to 720 Hz. That is, the first reset start signal STV-s11 includes at least 6 low-level active pulses. For example, the frequency f1 of the first reset start signal STV-s11 is 720 Hz, 1080 Hz, 1440 Hz, etc.

[0133] Figure 5 This is a comparison chart showing the improvement of ghosting issues in different products, provided as an embodiment of this application.

[0134] like Figure 5As shown, the improvement in the ghosting problem of electronic device 1 varies depending on the value of the first set brightness. The value of the first set brightness can be selected according to different needs.

[0135] In the first product, the first set brightness is located at the boundary between severe and slight ghosting. At brightness levels with severe ghosting, a first pulse timing sequence A is used for driving; at brightness levels with slight or negligible ghosting, a second pulse timing sequence B is used. This aims to improve the severe ghosting phenomenon in electronic device 1 while reducing the power consumption of electronic device 1.

[0136] In the second product, the first set brightness is located at the boundary between slight and negligible ghosting. The first pulse timing sequence A is used for brightness levels with both severe and slight ghosting, while the second pulse timing sequence B is used for brightness levels with negligible ghosting. This achieves complete elimination of ghosting in electronic device 1.

[0137] In the third product, the initial brightness setting falls within the range where motion blur is negligible. The first pulse timing sequence A is used for both severe and slight motion blur at certain brightness levels. The first pulse timing sequence A is also used for some slightly higher brightness levels where motion blur is negligible. For exceptionally high brightness levels where motion blur is negligible, the second pulse timing sequence B is used. This aims to completely eliminate motion blur in electronic device 1 while preventing slight motion blur from appearing at slightly higher brightness levels (where motion blur was negligible at the factory) due to aging of electronic device 1.

[0138] In some embodiments, the value range of the first set brightness can be, for example, 10 nits to 200 nits. For instance, the first set brightness can be 10 nits, 30 nits, 50 nits, 70 nits, 90 nits, 100 nits, 110 nits, 130 nits, 150 nits, 170 nits, 190 nits, or 200 nits. A reasonable value for the first set brightness can improve the ghosting problem of the electronic device 1 while also considering the power consumption of the electronic device 1.

[0139] In some embodiments, such as Figure 5 As shown, the first luminous intensity is the luminous intensity within the first brightness range, and the second luminous intensity is the luminous intensity within the third brightness range. Alternatively, it can be understood that the first luminous intensity is not a single point value, but rather any value within a range. Similarly, the second luminous intensity is not a single point value, but rather any value within a range.

[0140] For example, the first luminous brightness is any brightness within the range from the minimum value to the first set brightness. As long as the brightness of the display panel 10 is between the minimum value and the first set brightness, the display panel 10 will execute the first pulse timing sequence A. When the brightness of the display panel 10 is between the first set brightness and the maximum value, the display panel 10 will execute the second pulse timing sequence B.

[0141] Figure 6 This is a driving timing diagram for another display panel provided in an embodiment of this application.

[0142] In other embodiments, the display driver integrated circuit 20 is also used to receive a third brightness command characterizing a third luminance brightness, and output a third pulse timing C to the display panel 10, including a third reset start signal STV-s13 and a third luminance control start signal STV-em3.

[0143] The third luminance is less than the first set luminance, and also less than the first luminance. In other words, even when the luminance is less than the first set value, two or more different pulse timing sequences may occur.

[0144] The frequency of the third reset start signal STV-s13 is f5, and the frequency of the third light emission control start signal STV-em3 is f6. The frequency f5 of the third reset start signal STV-s13 is equal to the frequency f1 of the first reset start signal STV-s11. The frequency f5 of the third reset start signal STV-s13 is less than or equal to the frequency f6 of the third light emission control start signal STV-em3. The frequency f6 of the third light emission control start signal STV-em3 may or may not be equal to the frequency f3 of the first light emission control start signal STV-em1.

[0145] Therefore, the frequency f5 of the third reset start signal STV-s13 is also greater than the frequency f2 of the second reset start signal STV-s12. Thus, even with the luminous intensity at the third luminous intensity, the ghosting problem of electronic device 1 can still be improved. The principle behind improving ghosting, flickering, and display quality is the same as the principle behind improving ghosting when the luminous intensity is the first luminous intensity, and will not be elaborated further here.

[0146] In some embodiments, the duty cycle of the first light emission control start signal STV-em1 is greater than the duty cycle of the third light emission control start signal STV-em3.

[0147] Duty cycle = the sum of the durations of all low-level pulses in a frame / the duration of a frame, which can be expressed as follows: Figure 6As shown, the duration of each low-level pulse in the first light-emitting control start signal STV-em1 is greater than the duration of each low-level pulse in the third light-emitting control start signal STV-em3. Alternatively, the duration of some low-level pulses in the first light-emitting control start signal STV-em1 may be greater than the duration of low-level pulses in the third light-emitting control start signal STV-em3. The duration of another portion of the low-level pulses in the first light-emitting control start signal STV-em1 may be less than or equal to the duration of low-level pulses in the third light-emitting control start signal STV-em3. Furthermore, the durations of multiple low-level pulses in the third light-emitting control start signal STV-em3 may be completely equal, not completely equal, or completely unequal. As long as the sum of the durations of all low-level pulses in one frame of the first light emission control start signal STV-em1 is greater than the sum of the durations of all low-level pulses in one frame of the third light emission control start signal STV-em3, the duty cycle of the first light emission control start signal STV-em1 can be made greater than the duty cycle of the third light emission control start signal STV-em3.

[0148] In other embodiments, the duty cycle of the first emission control start signal STV-em1 can also be equal to the duty cycle of the third emission control start signal STV-em3. For example, in low-brightness scenarios, the pulse timing is the same for various low-brightness conditions.

[0149] In some embodiments, the first luminous intensity is a specific point value. And / or, the third luminous intensity is a specific point value.

[0150] In other embodiments, the first luminance is the luminance within a first luminance range. And / or, the third luminance is the luminance within a second luminance range. Alternatively, it can be understood that the first luminance is not a single point value, but any value within a range. Similarly, the third luminance is not a single point value, but any value within a range.

[0151] For example, the third luminance is any luminance within the range of the minimum value to the fourth set luminance. As long as the luminance of the display panel 10 is between the minimum value and the fourth set luminance, the display panel 10 executes the third pulse timing sequence C. If the luminance of the display panel 10 is between the fourth set luminance and the first set value, the display panel 10 executes the first pulse timing sequence A. The fourth set value is less than the first set value.

[0152] Average current = on-time * current at on-time. Therefore, when the duty cycle of the first light-emitting control start signal STV-em1 is greater than the duty cycle of the third light-emitting control start signal STV-em3, the on-time of the first light-emitting control start signal STV-em1 is greater than that of the third light-emitting control start signal STV-em3. Consequently, the peak current of the light-emitting device 116 when executing the first pulse timing A is less than the peak current of the light-emitting device 116 when executing the third pulse timing C. That is, the charging voltage of the light-emitting device 116 when executing the first pulse timing A is less than the charging voltage of the light-emitting device 116 when executing the third pulse timing C. A larger charging voltage results in greater power consumption. Therefore, when both the first pulse timing A and the third pulse timing C can optimize the display ghosting problem in low-brightness scenarios, increasing the duty cycle of the light-emitting control start signal can reduce the power consumption of the electronic device 1. Conversely, a larger peak current results in better improvement of ghosting, screen flicker, and image quality issues in low-brightness scenarios. Since both the first pulse timing sequence A and the third pulse timing sequence C can optimize the display ghosting problem in low-brightness scenarios, reducing the duty cycle of the light emission control start signal can further improve the improvement of ghosting, screen flicker, and image quality in low-brightness scenarios. Therefore, when the display driver integrated circuit 20 has the ability to output the first pulse timing sequence A and the third pulse timing sequence C, the ghosting, screen flicker, image quality, and power consumption problems of the electronic device 1 can be further optimized. In addition, the larger the duty cycle of the light emission control start signal, the smaller the peak current, the smaller the required gamma code, the larger the data voltage, the larger the gamma fluctuation margin, the greater the guarantee of gamma tuning (yield), and the higher the yield of the electronic device 1.

[0153] Figure 7 This is a comparison diagram of duty cycles in different pulse timings provided in an embodiment of this application.

[0154] In some embodiments, such as Figure 7 As shown, the display driver integrated circuit is also used to receive a fourth brightness command characterizing the fourth luminance, and output a fourth pulse timing D to the display panel, including a fourth reset start signal and a fourth luminance control start signal.

[0155] The fourth luminance is less than the first set luminance, and less than both the first and third luminances. In other words, even when the luminance is less than the first set value, multiple different pulse timing sequences can still occur.

[0156] The frequency of the fourth reset start signal is f7, and the frequency of the fourth light emission control start signal STV-em4 is f8. The frequency f7 of the fourth reset start signal is equal to the frequency f1 of the first reset start signal STV-s11, and the frequency f7 of the fourth reset start signal is less than or equal to the frequency f8 of the fourth light emission control start signal. The frequency f8 of the fourth light emission control start signal STV-em4 and the frequency f3 of the first light emission control start signal STV-em1 may or may not be equal.

[0157] Based on this, in the first embodiment, such as Figure 7 As shown, the duty cycle of the fourth light emission control start signal STV-em4 is less than that of the third light emission control signal STV-em3, and less than that of the first light emission control start signal STV-em1. That is, among the three, the fourth light emission control start signal STV-em4 has the smallest duty cycle, and the first light emission control start signal STV-em1 has the largest duty cycle. For example, in low-brightness scenarios, the display driver integrated circuit 20 can generate multiple start-up light emission control signals with different duty cycles for different levels of brightness.

[0158] The difference between the duty cycle of the first light emission control start signal STV-em1 and the duty cycle of the third light emission control start signal STV-em3 can be greater than, equal to, or less than the difference between the duty cycle of the third light emission control start signal STV-em3 and the duty cycle of the fourth light emission control start signal STV-em4. This application does not limit this aspect.

[0159] In the second embodiment, the duty cycle of the fourth light emission control start signal STV-em4 is equal to the duty cycle of the third light emission control signal STV-em3, and both are less than the duty cycle of the first light emission control start signal STV-em1. For example, in low-brightness scenarios, for different levels of low brightness, the duty cycle of the start light emission control signal generated by the display driver integrated circuit 20 in the ultra-low brightness and lower brightness ranges is less than the duty cycle of the start light emission control signal generated by the display driver integrated circuit 20 in the general low brightness range.

[0160] In the third embodiment, the duty cycle of the fourth light emission control start signal STV-em4 is less than the duty cycle of the third light emission control signal STV-em3, and the duty cycle of the third light emission control signal STV-em3 is equal to the duty cycle of the first light emission control start signal STV-em1. For example, in low-brightness scenarios, for different levels of low brightness, the duty cycle of the start light emission control signal generated by the display driver integrated circuit 20 in the ultra-low brightness range is less than the duty cycle of the start light emission control signal generated by the display driver integrated circuit 20 in the lower brightness range. The duty cycle of the start light emission control signal generated by the display driver integrated circuit 20 in the lower brightness range is equal to the duty cycle of the start light emission control signal generated by the display driver integrated circuit 20 in the general low brightness range.

[0161] In the fourth embodiment, the duty cycle of the fourth light emission control start signal STV-em4 is equal to the duty cycle of the third light emission control signal STV-em3, and equal to the duty cycle of the first light emission control start signal STV-em1. For example, in low-brightness scenarios, the display driver integrated circuit 20 can generate light emission control signals with the same duty cycle for different levels of low brightness.

[0162] Of course, the display driver integrated circuit 20 can also output more different pulse timing sequences when the luminous intensity is less than the fourth luminous intensity. In these multiple pulse timing sequences, the duty cycle of the luminous control start signal is different. For example, as the luminous intensity increases, the duty cycle of the luminous control signal in the multiple pulse timing sequences gradually increases. The frequencies of the luminous control signals in the multiple pulse timing sequences can be the same or different. The frequencies of the reset start signals in the multiple pulse timing sequences can also be the same or different.

[0163] When the luminous intensity is greater than the first set brightness, the display driver integrated circuit 20 can output only one second pulse timing sequence B, or it can output multiple different pulse timing sequences. The frequencies of the luminous control signals in the multiple pulse timing sequences can be the same or different. The duty cycles of the luminous control signals in the multiple pulse timing sequences can be the same or different. The frequencies of the reset start signals in the multiple pulse timing sequences can be the same or different.

[0164] By further refining the duty cycle settings of the light emission control signal, issues such as ghosting, screen flickering, image quality, power consumption, and yield of electronic device 1 can be further optimized.

[0165] The display driver integrated circuit 20 provided in this application embodiment can be applied in the display module 40 provided in this application embodiment. 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.

[0166] Figure 8A This is a schematic diagram illustrating image data compensation implemented by an electronic device according to an embodiment of this application. Figures 8B-8D A timeline of a compensation scheme provided in an embodiment of this application.

[0167] This application also provides a drive controller 30, in some embodiments, such as Figure 8A As shown, the drive controller 30 is used to receive first initial image data and a first compensation instruction matching the fourth luminous intensity, and output first compensated image data to the display driver integrated circuit 20. For example, the drive controller 30 includes a first compensation module, which receives the first initial image data and the first compensation instruction matching the fourth luminous intensity, and outputs the first compensated image data to the display driver integrated circuit 20.

[0168] The drive controller 30 is also configured to receive second initial image data and a second compensation command matching the fifth luminance, and output first uncompensated image data to the display driver integrated circuit 20. The image data output by the drive controller 30 to the display driver integrated circuit 20 is, for example, a digital signal.

[0169] The fourth luminous intensity is less than the second set luminous intensity, and the fifth luminous intensity is greater than the third set luminous intensity. The third set luminous intensity is equal to the second set luminous intensity, but the third set luminous intensity can also be greater than the second set luminous intensity. That is, the fourth luminous intensity is less than the fifth luminous intensity.

[0170] In other words, the drive controller 30 and the drive integrated circuit 20 are capable of executing compensation scheme E, which is as follows: in low-brightness scenes, the drive controller 30 compensates for the received initial image data. In high-brightness scenes, the drive controller 30 does not compensate for the received initial image data. Regardless of whether it is a low-brightness or high-brightness scene, the display drive integrated circuit 20 does not compensate for the received image data.

[0171] In other words, in compensation scheme E, in low-brightness scenarios, the drive controller 30 compensates for the image data, but the display driver integrated circuit 20 does not compensate for the image data. Image data compensation includes, for example, demura compensation and overdriving compensation (OD).

[0172] By comparing the image data received and output by the drive controller 30, it can be determined whether the drive controller 30 has performed compensation processing on the image data. For example, based on the differences between the two image data, it can be analyzed whether there is a regularity in the blocks and the data itself, thereby determining whether compensation has been performed and, further, inferring what type of compensation it is.

[0173] In some embodiments, the display driver integrated circuit 20 does not compensate for the received first uncompensated image data. Instead, it directly converts the first uncompensated image data into an analog signal and outputs the first uncompensated image data after digital-to-analog conversion as the second uncompensated image data to the display panel 10.

[0174] For example, the display driver integrated circuit 20 includes a second compensation module, which receives the first uncompensated image data and outputs the second uncompensated image data after digital-to-analog conversion to the display panel 10. In high-brightness scenarios, there is no need to compensate the image data, which can reduce the power consumption of the electronic device 1 and simplify the logic of the electronic device 1.

[0175] like Figure 8B As shown, the display effect is relatively ideal in high-brightness scenes, and image data compensation is not required. Compensation scheme E is only used to compensate the image data in low-brightness scenes to reduce the power consumption of the drive controller 30 and the display driver integrated circuit 20.

[0176] In other embodiments, such as Figure 8A As shown, after receiving the second initial image data and the second compensation instruction matching the fifth luminous intensity, the drive controller 30 is further configured to output a first auxiliary compensation instruction to the display driver integrated circuit 20. At this time, the display driver integrated circuit 20 is also configured to receive the first auxiliary compensation instruction and the first uncompensated image data, and for example, output second compensated image data to the display panel 10 according to the first auxiliary compensation instruction and the first uncompensated image data.

[0177] In other words, the drive controller 30 and the drive integrated circuit 20 have the capability to execute compensation scheme F. Compensation scheme F is as follows: In high-brightness scenarios, the drive controller 30 does not compensate for the received initial image data, but instead sends a first auxiliary compensation command to the display drive integrated circuit 20. Based on the first auxiliary compensation command, the display drive integrated circuit 20 compensates for the first uncompensated image data sent by the drive controller 30, converts the data signal into an analog signal, and outputs second compensated image data.

[0178] For example, the display driver integrated circuit 20 includes a second compensation module, which is used to receive a first auxiliary compensation command and a first uncompensated image data, and output digital-to-analog converted and compensated second compensated image data to the display panel 10.

[0179] In high-brightness scenarios where compensation is not critical, image data can be compensated using the display driver integrated circuit 20. The processing scheme of the display driver integrated circuit 20 is relatively simple and consumes less power than the driver controller 30. Therefore, in high-brightness scenarios, using the display driver integrated circuit 20 to compensate image data can optimize display effects while reducing the power consumption of the electronic device 1.

[0180] For example, such as Figure 8C As shown, in low-brightness scenes, electronic device 1 uses compensation scheme E to compensate for the image data. In high-brightness scenes, electronic device 1 uses compensation scheme F to compensate for the image data.

[0181] In some other embodiments, such as Figure 8D As shown, in high-brightness scenes, compensation scheme E is also used to compensate the image data. This reduces the need to switch between compensation schemes and ensures display quality. Therefore, regardless of whether the scene is low-brightness or high-brightness, compensation scheme E is used to compensate the image data.

[0182] When implementing compensation scheme E, the compensation coefficients for the image data by the drive controller 30 for different brightness levels can be the same or different. Figure 8D This example illustrates the concept of using the same compensation coefficient for image data in the drive controller 30 for different brightness levels.

[0183] In the electronic device 1 provided in this application embodiment, after receiving initial image data, if the drive controller 30 simultaneously receives a first compensation instruction matching low luminous brightness (fourth luminous brightness), the drive controller 30 executes a compensation scheme for the initial image data and outputs the compensated image data to the display driver integrated circuit 20. However, if the drive controller 30 simultaneously receives a second compensation instruction matching high luminous brightness (fifth luminous brightness), the drive controller 30 executes a non-compensation scheme for the initial image data and outputs uncompensated image data to the display driver integrated circuit 20. The drive controller 30 has a high process node, strong processing capabilities, and good processing effect. Therefore, after receiving the initial image data, the drive controller 30 performs compensation processing on low-brightness images with depth compensation requirements, which can improve problems such as uneven low grayscale display and uneven low grayscale dirty mura in the electronic device 1. However, the drive controller 30 does not perform compensation processing on high-brightness images without high compensation requirements to reduce the power consumption of the electronic device 1.

[0184] In some embodiments, the display driver integrated circuit 20 outputs the same pulse timing regardless of whether it is in low brightness mode or high brightness mode. The electronic device 1 compensates for the display effect only through the driver controller 30.

[0185] In other embodiments, the display driver integrated circuit 20 further includes a timing switching module, which can switch between the first pulse timing A and the second pulse timing B as described above. That is, while the electronic device 1 compensates for the display effect through the driver controller 30, it also switches the pulse timing for different brightness levels through the display driver integrated circuit 20 to improve the ghosting problem.

[0186] During the driving process of electronic device 1, by switching the driving timing scheme and compensation scheme of electronic device 1 in coordination under different brightness levels, the display effect and power consumption of electronic device 1 can reach a better level.

[0187] In some embodiments, the values ​​of the second and third set brightness can range from, for example, 10 nits to 200 nits. For instance, the values ​​of the second or third set brightness can be 10 nits, 30 nits, 50 nits, 70 nits, 90 nits, 100 nits, 110 nits, 130 nits, 150 nits, 170 nits, 190 nits, or 200 nits. This aims to improve the unevenness of low grayscale display and dirty mura in electronic device 1 while also considering the power consumption of electronic device 1.

[0188] Figure 9A This is a schematic diagram illustrating another electronic device implementing image data compensation according to an embodiment of this application. Figure 9B A timeline of another compensation scheme provided in an embodiment of this application.

[0189] In some embodiments, such as Figure 9A As shown, the drive controller 30 is also used to receive third initial image data and a third compensation instruction matching the sixth luminous intensity. For example, based on the third compensation instruction, after compensating the third initial image data through the first compensation module, it outputs third compensated image data and a second auxiliary compensation instruction to the display driver integrated circuit 20. The display driver integrated circuit 20 is used to receive the third compensated image data and the second auxiliary compensation instruction. For example, based on the second auxiliary compensation instruction, after compensating and performing digital-to-analog conversion on the third compensated image data through the second compensation module, it outputs fourth compensated image data to the display panel 10.

[0190] At this point, the third set brightness is greater than the second set brightness, the sixth set brightness is greater than the second set brightness, and the sixth set brightness is less than the third set brightness. In other words, the sixth set brightness is greater than the fourth set brightness, and the sixth set brightness is less than the fifth set brightness.

[0191] That is, the drive controller 30 and the display driver integrated circuit 20 have the capability to execute compensation scheme G. Compensation scheme G is as follows: In an intermediate brightness scene, the drive controller 30 compensates the received initial image data, outputs the compensated third image data, and sends a second auxiliary compensation command to the display driver integrated circuit 20. Based on the second auxiliary compensation command, the display driver integrated circuit 20 compensates the third image data, performs digital-to-analog conversion, and outputs fourth compensated image data.

[0192] like Figure 9B As shown, in low-brightness scenarios where the brightness is less than the second set value, compensation scheme E is executed. In low-to-medium brightness scenarios where the brightness is greater than the second set value but less than the third set value, compensation scheme G is executed. In high-brightness scenarios where the brightness is greater than the third set value, compensation scheme F is executed.

[0193] In the mid-brightness scene, both the drive controller 30 and the display driver integrated circuit 20 perform a certain degree of compensation on the image data, which can realize the transition from the compensation scheme E in the low-brightness scene to the compensation scheme F in the high-brightness scene, realize the transition switching between the two compensation schemes, make the display effect transition smoothly, and further optimize the display effect.

[0194] In some embodiments, the drive controller 30 is further configured to receive fourth initial image data and a fourth compensation instruction matching the seventh luminous intensity. For example, based on the fourth compensation instruction, after compensating the fourth initial image data through the first compensation module, it outputs fifth compensated image data and a third auxiliary compensation instruction to the display driver integrated circuit 20. At this time, the display driver integrated circuit 20 is configured to receive the fifth compensated image data and the third auxiliary compensation instruction. For example, based on the third auxiliary compensation instruction, after further compensating and performing digital-to-analog conversion on the fifth compensated image data through the second compensation module, it outputs sixth compensated image data to the display panel 10.

[0195] The seventh luminous brightness is greater than the second set brightness, but less than the third set brightness. The seventh luminous brightness is a medium-low brightness, and greater than the sixth luminous brightness.

[0196] In other words, in scenarios with luminous intensity of the sixth and seventh luminous intensity, electronic device 1 executes compensation scheme G. However, for different luminous intensities, the compensation coefficients for image data by drive controller 30 and display driver integrated circuit 20 are different.

[0197] For example, the compensation coefficient of the drive controller 30 for the fourth initial image data at the seventh luminance is less than the compensation coefficient of the drive controller 30 for the third initial image data at the sixth luminance. Alternatively, it can be understood that the brighter the luminance, the smaller the compensation coefficient of the drive controller 30.

[0198] The compensation coefficient of the display driver integrated circuit 20 for the fifth compensated image data at the seventh luminance is greater than the compensation coefficient of the display driver integrated circuit 20 for the third compensated image data at the sixth luminance. Alternatively, it can be understood that the brighter the luminance, the larger the compensation coefficient of the display driver integrated circuit 20.

[0199] For example, Figure 9B In scenarios where the brightness falls between the second and third set brightness levels, the intersection of the dotted line and the solid line is the midpoint. Before the midpoint, the compensation coefficient of the drive controller 30 for the image data is greater than that of the display driver integrated circuit 20, and the compensation for the image data is primarily performed by the drive controller 30. After the midpoint, the compensation coefficient of the drive controller 30 for the image data is less than that of the display driver integrated circuit 20, and the compensation for the image data is primarily performed by the display driver integrated circuit 20.

[0200] In some embodiments, the drive controller 30 is further configured to receive fifth initial image data and a fifth compensation instruction matching the eighth luminous intensity. For example, based on the fifth compensation instruction, after compensating the fifth initial image data through the first compensation module, it outputs seventh compensated image data and a fourth auxiliary compensation instruction to the display driver integrated circuit 20. At this time, the display driver integrated circuit 20 is configured to receive the seventh compensated image data and the fourth auxiliary compensation instruction. For example, based on the fourth auxiliary compensation instruction, after further compensating and performing digital-to-analog conversion on the seventh compensated image data through the second compensation module, it outputs eighth compensated image data to the display panel 10.

[0201] The eighth luminous intensity is greater than the second set brightness, but less than the third set brightness. The eighth luminous intensity is a medium-low brightness, and greater than the seventh luminous intensity.

[0202] For example, the compensation coefficient of the drive controller 30 for the fifth initial image data at the eighth luminance is less than the compensation coefficient of the drive controller 30 for the fourth initial image data at the seventh luminance. The compensation coefficient of the display driver integrated circuit 20 for the seventh compensated image data at the eighth luminance is greater than the compensation coefficient of the display driver integrated circuit 20 for the fifth compensated image data at the seventh luminance.

[0203] For example, the compensation coefficients of the drive controller 30 for the fifth initial image data at the eighth luminous intensity, the compensation coefficients of the drive controller 30 for the fourth initial image data at the seventh luminous intensity, and the compensation coefficients of the drive controller 30 for the third initial image data at the sixth luminous intensity satisfy the same linear equation.

[0204] The compensation coefficients of the display driver integrated circuit 20 for the seventh compensated image data at the eighth luminance, the compensation coefficients of the display driver integrated circuit 20 for the fifth compensated image data at the seventh luminance, and the compensation coefficients of the display driver integrated circuit 20 for the third compensated image data at the sixth luminance satisfy the same linear equation.

[0205] In some embodiments, when the luminance is greater than a second set value and less than a third set value, as the luminance increases, the compensation coefficient of the drive controller 30 for the initial image data under the matching luminance decreases linearly, and the compensation coefficient limit of the display drive integrated circuit 20 for the image data sent by the drive controller 30 increases.

[0206] In mid-brightness scenarios, both the drive controller 30 and the display driver integrated circuit 20 compensate for the image data to a certain extent. As the brightness gradually increases, the degree of compensation by the display driver integrated circuit 20 gradually increases until entering high-brightness scenarios, where only the display driver integrated circuit 20 compensates for the image data. This gradual switching between the two compensation schemes results in a smooth transition in the display effect, further optimizing the display performance.

[0207] Figure 10 This is a schematic diagram illustrating the coordination of timing switching and compensation switching between different products, as provided in an embodiment of this application.

[0208] In some embodiments, such as Figure 10 The fourth type of product has a first set brightness that is greater than the third set brightness.

[0209] In this product, when in a low-brightness scenario and the luminous intensity is less than a second preset brightness, electronic device 1 executes the first pulse timing sequence A and compensation scheme E. When in a low-brightness scenario and the luminous intensity is greater than a second preset value but less than a third preset brightness, electronic device 1 executes the first pulse timing sequence A and compensation scheme G. When in a low-brightness scenario and the luminous intensity is greater than a third preset value but less than a first preset brightness, electronic device 1 executes the first pulse timing sequence A and compensation scheme G. When in a high-brightness scenario and the luminous intensity is greater than the first preset brightness, electronic device 1 executes the second pulse timing sequence B and compensation scheme F.

[0210] In other embodiments, such as Figure 10 The fifth type of product has a first set brightness that is less than the second set brightness.

[0211] In this product, when in a low-brightness scenario and the luminous intensity is less than a first preset brightness, electronic device 1 executes the first pulse timing sequence A and compensation scheme E. When in a low-brightness scenario and the luminous intensity is greater than the first preset value but less than the second preset brightness, electronic device 1 executes the second pulse timing sequence B and compensation scheme E. When in a medium-low brightness scenario and the luminous intensity is greater than the second preset value but less than the third preset brightness, electronic device 1 executes the second pulse timing sequence B and compensation scheme G. When in a high-brightness scenario and the luminous intensity is greater than the third preset brightness, electronic device 1 executes the second pulse timing sequence B and compensation scheme F.

[0212] In other words, the first set value is greater than the third set value, or the first set value is less than the second set value. The first set value does not fall between the second and third set values. Therefore, when electronic device 1 interchanges the first pulse timing sequence A and the second pulse timing sequence B, the compensation scheme executed by electronic device 1 is either only the drive controller 30 compensates or only the display driver integrated circuit 20 compensates; the compensation scheme is a single and stable compensation scheme. That is, there will be no switching of the compensation scheme when the pulse timing is switched, reducing other variables of electronic device 1 during pulse timing switching, thereby optimizing the display effect variation caused by the pulse timing change.

[0213] This application embodiment also provides a driving method for an electronic device 1, which includes, for example, any of the above-described electronic devices. The driving method for the electronic device 1 includes: a display driver integrated circuit 20 receiving a first brightness command representing a first luminance, and outputting a first pulse timing sequence A to a display panel 10; and the display driver integrated circuit 20 receiving a second brightness command representing a second luminance, and outputting a second pulse timing sequence B to the display panel 10.

[0214] In some embodiments, the driving method of the electronic device 1 further includes: the display driver integrated circuit 20 receiving a third brightness command characterizing a third luminance, and outputting a third pulse timing C to the display panel 10.

[0215] In some embodiments, the driving method of the electronic device 1 further includes: the driving controller 30 receiving first initial image data and a first compensation instruction matching the fourth luminous intensity, and controlling the driving controller 30 and the display driving integrated circuit 20 to execute the compensation scheme E.

[0216] In some embodiments, the driving method of the electronic device 1 further includes: the driving controller 30 receiving second initial image data and a second compensation instruction matching the fifth luminous intensity, and controlling the driving controller 30 and the display driving integrated circuit 20 to execute the compensation scheme F.

[0217] In some embodiments, the driving method of the electronic device 1 further includes: the driving controller 30 receiving third initial image data and a third compensation instruction matching the sixth luminous intensity, and controlling the driving controller 30 and the display driving integrated circuit 20 to execute the compensation scheme G.

[0218] In some embodiments, the driving method of the electronic device 1 further includes: the driving controller 30 receiving fourth initial image data and a fourth compensation instruction matching the seventh luminous intensity, and controlling the driving controller 30 and the display driving integrated circuit 20 to execute the compensation scheme G. Furthermore, the compensation coefficients of the driving controller 30 and the display driving integrated circuit 20 are different for different brightness levels. For example, as the brightness gradually increases, the compensation coefficient of the driving controller 30 gradually decreases, while the compensation coefficient of the display driving integrated circuit 20 gradually increases.

[0219] The beneficial effects of the driving method of the electronic device 1 provided in this application embodiment are the same as the beneficial effects of the electronic device 1, and will not be repeated here.

[0220] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A display driving integrated circuit, characterized by comprising: The display driving integrated circuit is used for driving the display panel. The display driving integrated circuit is further 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 a first set brightness, and the second light-emitting brightness is greater than the first set brightness; f1 is a frequency of the first reset start signal, f2 is a frequency of the second reset start signal, f3 is a frequency of the first light-emitting control start signal, and f4 is a frequency of the second light-emitting control start signal; f3 is greater than or equal to f4, f1 is less than or equal to f3, and f2 is less than or equal to f4; and, f1 is greater than f2, or f1 is greater than or equal to 720 HZ and f1 is equal to f2.

2. The display driver integrated circuit of claim 1, wherein, In the case that f1 is greater than f2, f1 is greater than or equal to 720 HZ.

3. The display driver integrated circuit of claim 2, wherein, f2 is greater than or equal to 360 HZ.

4. The display driver integrated circuit of any of claims 1-3, wherein, The first set brightness ranges from 10 nit to 200 nit.

5. The display driver integrated circuit according to any one of claims 1 to 3, wherein, The display driving integrated circuit is further used for: receiving a third brightness instruction representing a third light-emitting brightness, and outputting a third reset start signal and a third light-emitting control start signal to the display panel; wherein the third light-emitting brightness is less than the first set brightness and less than the first light-emitting brightness; a duty cycle of the first light-emitting control start signal is greater than a duty cycle of the third light-emitting control start signal; f5 is equal to f1, f5 is less than or equal to f6, f5 is a frequency of the third reset start signal, and f6 is a frequency of the third light-emitting control start signal.

6. The display driver integrated circuit of any one of claims 1-3, wherein, The display panel comprises an array substrate and a plurality of light-emitting devices arranged on the array substrate. The light-emitting device comprises, in sequence, a first electrode layer, a first light-emitting layer, a conductive connection layer, a second light-emitting layer, and a second electrode layer arranged on the array substrate.

7. A display module, characterized by The display module comprises a display driving integrated circuit and a display panel, the display driving integrated circuit is coupled with the display panel; the display driving integrated circuit comprises the display driving integrated circuit of any one of claims 1-6.

8. An electronic device, comprising: The electronic device comprises a driving controller, a display driving integrated circuit, and a display panel, the display driving integrated circuit is coupled with the driving controller and the display panel respectively; The display driving integrated circuit comprises the display driving integrated circuit of any one of claims 1-6, and the driving controller is used for sending the first brightness instruction and the second brightness instruction to the display driving integrated circuit.

9. The electronic device of claim 8, wherein, The driving controller is further used for receiving initial image data and outputting compensation image data to the display driving integrated circuit. The display driving integrated circuit is used for digital-to-analog conversion on the compensation image data and outputting the converted compensation image data to the display panel.

10. A driving method of an electronic device, characterized by, The electronic device comprises a driving controller, a display driving integrated circuit, and a display panel; The driving method comprises: The display driving integrated circuit receives a first brightness instruction representing a first light-emitting brightness, and outputs a first reset start signal and a first light-emitting control start signal to the display panel; The display driving integrated circuit receives a second brightness instruction representing a second light-emitting brightness, and outputs 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 first set brightness, and the second light-emitting brightness is greater than the first set brightness; f1 is a frequency of the first reset start signal, f2 is a frequency of the second reset start signal, f3 is a frequency of the first light-emitting control start signal, and f4 is a frequency of the second light-emitting control start signal; f3 is greater than or equal to f4, f1 is less than or equal to f3, and f2 is less than or equal to f4; and f1 is greater than f2, or f1 is greater than or equal to 720 HZ and f1 is equal to f2.

11. The driving method according to claim 10, wherein The driving method further includes: The driving controller receives initial image data and outputs compensated image data to the display driving integrated circuit; The display driving integrated circuit performs digital-to-analog conversion on the compensated image data and outputs the converted compensated image data to the display panel.

12. The driving method according to claim 10 or 11, wherein The driving method further includes: The display driving integrated circuit receives a third brightness instruction representing a third light-emitting brightness, and outputs a third reset start signal and a third light-emitting control start signal to the display panel; The third light-emitting brightness is less than the first set brightness and less than the first light-emitting brightness; a duty cycle of the first light-emitting control start signal is greater than a duty cycle of the third light-emitting control start signal; f5 is equal to f1, f5 is less than or equal to f6, f5 is a frequency of the third reset start signal, and f6 is a frequency of the third light-emitting control start signal.

13. An electronic device, comprising: The electronic device includes a driving controller, a display driving integrated circuit, and a display panel, and the display driving integrated circuit is coupled to the driving controller and the display panel, respectively; The driving controller is configured to: receive first initial image data in a first brightness interval and output first compensated image data to the display driving integrated circuit; receive second initial image data in a second brightness interval and output first uncompensated image data and a first auxiliary compensation instruction to the display driving integrated circuit; The display driving integrated circuit is configured to: output converted compensated image data to the display panel according to the first compensated image data; output second compensated image data to the display panel according to the first auxiliary compensation instruction and the first uncompensated image data; The brightness of the first brightness interval is less than a second set brightness, the brightness of the second brightness interval is greater than a third set brightness, and the third set brightness is greater than the second set brightness.

14. The electronic device of claim 13, wherein The driving controller is further configured to: receive third initial image data in a third brightness interval and output third compensated image data and a second auxiliary compensation instruction to the display driving integrated circuit; The display driving integrated circuit is configured to receive the third compensation image data and the second auxiliary compensation instruction, and output fourth compensation image data to the display panel. The luminance in the third luminance range is greater than the second set luminance and less than the third set luminance. 15.The electronic device of claim 14, wherein The compensation coefficient of the driving controller for the third initial image data is a first compensation coefficient, and the compensation coefficient of the display driving integrated circuit for the third compensation image data is a second compensation coefficient; as the luminance in the third luminance range increases, the first compensation coefficient gradually decreases, and the second compensation coefficient gradually increases. 16.The electronic device of claim 14, wherein The third luminance range includes a sixth luminance and a seventh luminance. The driving controller is further configured to receive fourth initial image data at the sixth luminance in the third luminance range, output fifth compensation image data and a third auxiliary compensation instruction to the display driving integrated circuit; and the display driving integrated circuit is configured to receive the fifth compensation image data and the third auxiliary compensation instruction, and output sixth compensation image data to the display panel. The driving controller is further configured to receive fifth initial image data at the seventh luminance in the third luminance range, output seventh compensation image data and a fourth auxiliary compensation instruction to the display driving integrated circuit; and the display driving integrated circuit is further configured to receive the seventh compensation image data and the fourth auxiliary compensation instruction, and output eighth compensation image data to the display panel. The fourth compensation coefficient of the driving controller for the fifth initial image data is less than the third compensation coefficient of the driving controller for the fourth initial image data; and the sixth compensation coefficient of the display driving integrated circuit for the seventh compensation image data is greater than the fifth compensation coefficient of the display driving integrated circuit for the fifth compensation image data.

17. The electronic device of any of claims 13-16, wherein, The display panel includes an array substrate and a plurality of light emitting devices disposed on the array substrate. The light emitting device includes a first electrode layer, a first light emitting layer, a conductive connection layer, a second light emitting layer and a second electrode layer disposed on the array substrate in sequence, and the first light emitting layer and the second light emitting layer are configured to emit light of the same color.

18. A driving method of an electronic device, characterized by, The electronic device includes a driving controller, a display driving integrated circuit and a display panel. The driving method includes: The driving controller receives first initial image data in a first luminance range, and outputs first compensation image data to the display driving integrated circuit; and the display driving integrated circuit outputs converted compensation image data to the display panel according to the first compensation image data. The driving controller receives second initial image data in a second luminance range, and outputs first uncompensated image data and a first auxiliary compensation instruction to the display driving integrated circuit; and the display driving integrated circuit outputs second compensation image data to the display panel according to the first auxiliary compensation instruction and the first uncompensated image data. The luminance in the first luminance interval is less than a second set luminance, the luminance in the second luminance interval is greater than a third set luminance, and the third set luminance is greater than the second set luminance.

19. The driving method of claim 18, wherein, The driving method further comprises: The driving controller receives third initial image data in a third luminance interval, and outputs third compensation image data and a second auxiliary compensation instruction to the display driving integrated circuit; The display driving integrated circuit receives the third compensation image data and the second auxiliary compensation instruction, and outputs fourth compensation image data to the display panel; The luminance in the third luminance interval is greater than the second set luminance and less than the third set luminance.

20. The driving method of claim 19, wherein, The compensation coefficient of the driving controller to the third initial image data is a first compensation coefficient, and the compensation coefficient of the display driving integrated circuit to the third compensation image data is a second compensation coefficient; as the luminance in the third luminance interval increases, the first compensation coefficient gradually decreases, and the second compensation coefficient gradually increases.

21. The driving method of claim 19, wherein, The third luminance interval includes a sixth luminance and a seventh luminance; The driving method further comprises: The driving controller receives fourth initial image data at the sixth luminance in the third luminance interval, and outputs fifth compensation image data and a third auxiliary compensation instruction to the display driving integrated circuit; the display driving integrated circuit receives the fifth compensation image data and the third auxiliary compensation instruction, and outputs sixth compensation image data to the display panel; The driving controller receives fifth initial image data at the seventh luminance in the third luminance interval, and outputs seventh compensation image data and a fourth auxiliary compensation instruction to the display driving integrated circuit; the display driving integrated circuit receives the seventh compensation image data and the fourth auxiliary compensation instruction, and outputs eighth compensation image data to the display panel; The fourth compensation coefficient of the driving controller to the fifth initial image data is less than the third compensation coefficient of the driving controller to the fourth initial image data; and the sixth compensation coefficient of the display driving integrated circuit to the seventh compensation image data is greater than the fifth compensation coefficient of the display driving integrated circuit to the fifth compensation image data.

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