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

Abstract

The embodiment of the invention provides a display driving integrated circuit, a display module, electronic equipment and a driving method thereof, relates to the technical field of electronics, and is used for improving the display effect of an OLED (Organic Light Emitting Diode) display panel with a multi-light-emitting layer structure under a low gray scale. The display driving integrated circuit is used for receiving a first brightness instruction representing low brightness and outputting a first reset starting signal and a first light-emitting control starting signal to the display panel; and receiving a second brightness instruction representing high brightness, and outputting a second reset starting signal and a second light-emitting control starting signal to the display panel. The display driving integrated circuit outputs different driving time sequences under different brightness, and the reset times of the light-emitting device in the display panel can be increased by increasing the frequency of the first reset initial signal under low brightness, so that the peak current of the light-emitting device under low display brightness is increased, and the problem of smear display under a low-brightness scene is solved. Meanwhile, the display power consumption can be reduced by reducing the frequency of the second reset initial signal under the high display brightness.

Description

Technical Field

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

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

[0003] However, currently, the OLED display panel with a multi-light-emitting layer structure generally has a problem of poor display effect at low gray levels. Summary of the Invention

[0004] The present application provides a display driving integrated circuit, a display module, an electronic device, and a driving method thereof, which are used to improve the display effect of an OLED display panel with a multi-light-emitting layer structure at low gray levels.

[0005] In a first aspect of an embodiment of the present application, a display driving integrated circuit is provided. The display driving integrated circuit is used to drive a display panel; the display driving integrated circuit is further configured to: receive a first brightness instruction representing a first luminous brightness, and output a first reset start signal and a first light-emitting control start signal (a first type of pulse timing sequence) to the display panel; receive a second brightness instruction representing a second luminous brightness, and output a second reset start signal and a second light-emitting control start signal (a second type of pulse timing sequence) to the display panel. Wherein, the first luminous brightness is less than a first set brightness, and the second luminous brightness 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 light-emitting control start signal, and f4 is the frequency of the second light-emitting control start signal; f3≥f4, f1≦f3, f2≦f4. And, f1>f2, or, when f1≥720HZ, f1 = f2.

[0006] The display driving integrated circuit provided by the embodiment of the present application outputs different driving timings in low-brightness scenarios and high-brightness scenarios, and drives the display panel with different timings. In a low-brightness scenario, the display driving integrated circuit outputs a first reset start signal with a high frequency, increasing the number of times of anode reset of the light-emitting devices in the display panel. Taking the example that the light-emitting device includes two light-emitting layers, the anode reset of the light-emitting device is equivalent to completely discharging the residual current in the first parasitic capacitance and the second parasitic capacitance equivalent to the two light-emitting layers, and clearing the duty cycle corresponding to the residual current. Average current = on-time * current during on-time. After clearing the residual duty cycle, the on-time decreases. At the same average current, when the on-time decreases, the current during on-time will increase (the peak current increases). That is to say, the charging current of the first parasitic capacitance and the second parasitic capacitance will increase. The larger the charging current (peak current), the smaller the time difference for the first parasitic capacitance and the second parasitic capacitance to complete charging, and the shorter the over-bright duration, thereby improving the problem of display ghosting in low-brightness scenarios. At the same time, in a high-brightness scenario, since the ghosting problem can be ignored, the display driving integrated circuit outputs a second reset start signal with a low frequency. To achieve reducing the power consumption of the electronic device while solving the problem of display ghosting of the electronic device. In addition, since the frequency of the first reset start signal is less than or equal to the frequency of the first light-emitting control start signal, then, while the frequency of the first reset start signal increases, the frequency of the first light-emitting control start signal also increases. While enabling the light-emitting device to have a larger peak current (peak brightness), the interval time between two adjacent light emissions is reduced. Achieving improving the ghosting problem while further improving the screen flashing problem and enhancing the display image quality. Based on this, the display driving integrated circuit provided by the embodiment of the present application is applied to an electronic device, which can take into account and optimize problems such as ghosting, screen flashing, image quality, and power consumption of the electronic device.

[0007] In a possible implementation manner, when f1 > f2, f1 ≥ 720HZ. That is to say, within one image frame, the first reset start signal has at least 6 low-level start signals. That is, within one image frame, the anode of the light-emitting device needs to be reset at least 6 times. To ensure the improvement effect of the display panel ghosting problem.

[0008] In a possible implementation manner, when f1 > f2, f2 ≥ 360HZ. To ensure that in a high-brightness scenario, the anode of the light-emitting device needs to be reset at least 3 times, making the ghosting problem of the display panel negligible, while reducing the power consumption of the electronic device.

[0009] In a possible implementation manner, the value range of the first set brightness is 10nit to 200nit. Reasonably setting the value of the first set brightness can achieve improving the ghosting problem of the electronic device while taking into account the power consumption problem of the electronic device.

[0010] In a possible implementation, the display driving integrated circuit is further configured to: receive a third brightness instruction characterizing a third emission brightness, and output a third reset start signal and a third emission control start signal (a third pulse timing) to the display panel; wherein, the third emission brightness is less than the first set brightness and less than the first emission brightness; the duty cycle of the first emission control start signal is greater than the duty cycle of the third emission control start signal; f5 = f1, f5 ≦ f6, where f5 is the frequency of the third reset start signal and f6 is the frequency of the third emission control start signal.

[0011] Average current = turn-on time * current during turn-on. Therefore, when the duty cycle of the first emission control start signal is greater than the duty cycle of the third emission control start signal, the turn-on time of the first emission control start signal is greater than that of the third emission control start signal. Then, the peak current of the light-emitting device when executing the first pulse timing is less than the peak current of the light-emitting device when executing the third pulse timing. That is, the charging cross-voltage of the light-emitting device when executing the first pulse timing is less than the charging cross-voltage of the light-emitting device when executing the third pulse timing. And the larger the charging cross-voltage, the greater the power consumption. Then, when both the first pulse timing and the third pulse timing can optimize the display ghosting problem in the low-brightness scenario, increasing the duty cycle of the emission control start signal can reduce the power consumption of the electronic device. From another perspective, the larger the peak current, the better the improvement effect of the electronic device on ghosting, screen flashing, and image quality problems in the low-brightness scenario. Then, when both the first pulse timing and the third pulse timing can optimize the display ghosting problem in the low-brightness scenario, reducing the duty cycle of the emission control start signal can improve the improvement effect of ghosting, screen flashing, and image quality problems in the low-brightness scenario. Therefore, when the display driving integrated circuit has the ability to output the first pulse timing and the third pulse timing, the ghosting, screen flashing, image quality, and power consumption problems of the electronic device can be further optimized.

[0012] In a possible implementation, the first emission brightness is the emission brightness in the first brightness interval, and the third emission brightness is the emission brightness in the second brightness interval. The first pulse timing is executed for all brightness levels within the first brightness interval, rather than executing a different pulse timing for each brightness value, which can reduce the types of pulse timings and simplify the driving logic.

[0013] In a possible implementation, the display panel includes an array substrate and a plurality of light-emitting devices disposed on the array substrate; the light-emitting devices include a first electrode layer, a first light-emitting layer, a conductive connection layer, a second light-emitting layer, and a second electrode layer disposed in sequence on the array substrate. The display driving integrated circuit can more significantly improve the display effect of the light-emitting devices with multiple light-emitting layers.

[0014] In a second aspect of the embodiments of the present application, a display module is provided. The display module includes a display driving integrated circuit and a display panel, and the display driving integrated circuit is coupled to the display panel; the display driving integrated circuit includes the display driving integrated circuit according to any one of the first aspect.

[0015] The display module provided in the second aspect of the embodiments of the present application includes the display driving integrated circuit according to any one of the first aspect, and its beneficial effects are the same as those of the display driving integrated circuit, which will not be elaborated here.

[0016] In a third aspect of the embodiments of the present application, an electronic device is provided. The electronic device includes a driving controller, a display driving integrated circuit and a display panel, and the display driving integrated circuit is respectively coupled to the driving controller and the display panel; the display driving integrated circuit includes the display driving integrated circuit according to any one of the first aspect, and the driving controller is configured to send a first brightness instruction and a second brightness instruction to the display driving integrated circuit. And / or, the driving controller is configured to receive initial image data and output compensated image data to the display driving integrated circuit; the display driving 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 in the embodiments of the present application, after the driving controller receives the initial image data, regardless of whether the electronic device is in a low-brightness scene or a high-brightness scene, the driving controller compensates the initial image data and outputs the compensated image data to the display driving integrated circuit, so as to effectively improve problems such as uneven display, uneven sand grain feeling, screen flashing, and image quality in the electronic device. On the basis of compensating the image data, the electronic device can improve the display ghosting in the low-brightness scene, improve the screen flashing problem, enhance the display image quality, and reduce the power consumption of the electronic device by adjusting the timing in the low-emission brightness and high-emission brightness scenes.

[0017] In a fourth aspect of the embodiments of the present application, a driving method for an electronic device is provided. The electronic device includes a driving controller, a display driving integrated circuit, and a display panel. The driving method includes: the display driving integrated circuit receives a first brightness instruction representing a first emission brightness, and outputs a first reset start signal and a first emission control start signal to the display panel; the display driving integrated circuit receives a second brightness instruction representing a second emission brightness, and outputs a second reset start signal and a second emission control start signal to the display panel; wherein, the first emission brightness is less than a first set brightness, and the second emission brightness 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 emission control start signal, and f4 is the frequency of the second emission control start signal; f3≥f4, f1≦f3, f2≦f4; and, f1>f2, or, f1≥720HZ and f1 = 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 a possible implementation manner, on the basis that the display driving integrated circuit receives the first brightness instruction and the second brightness instruction, the driving method further includes: the display driving integrated circuit receives a third brightness instruction representing a third emission brightness, and outputs a third reset start signal and a third emission control start signal to the display panel; wherein, the third emission brightness is less than the first set brightness and less than the first emission brightness; the duty cycle of the first emission control start signal is greater than the duty cycle of the third emission control start signal; f5 = f1, f5≦f6, f5 is the frequency of the third reset start signal, and f6 is the frequency of the third emission control start signal.

[0019] In a fifth aspect of the embodiments of the present application, an electronic device is provided. The electronic device includes a driving controller, a display driving integrated circuit, and a display panel. The display driving integrated circuit is respectively coupled to the driving controller and the display panel. The display driving integrated circuit includes the display driving integrated circuit according to any one of the first aspects. The driving controller is configured to send a first brightness instruction and a second brightness instruction to the display driving integrated circuit. And / or, the driving controller is configured to: receive first initial image data and a first compensation instruction matching a fourth emission brightness, and output first compensated image data to the display driving integrated circuit; receive second initial image data and a second compensation instruction matching a fifth emission brightness, and output first uncompensated image data to the display driving integrated circuit; the fourth emission brightness is less than a second set brightness, the fifth emission brightness 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 by the embodiment of the present application, after receiving the initial image data, if the driving controller simultaneously receives the first compensation instruction matching the low emission luminance (the fourth emission luminance), the driving controller executes the scheme of compensating the initial image data and outputs the compensated image data to the driving integrated circuit. After receiving the initial image data, if the driving controller simultaneously receives the second compensation instruction matching the high emission luminance (the fifth emission luminance), the driving controller executes the scheme of not compensating the initial image data and outputs the uncompensated image data to the driving integrated circuit. Therefore, after receiving the initial image data, the driving controller compensates the low-luminance images with a depth compensation requirement to improve problems such as uneven low-gray-scale display and uneven low-gray-scale sand grain feeling in the electronic device 1. However, the driving controller does not compensate the high-luminance images with no high compensation requirement to reduce the power consumption of the electronic device. If the display driving integrated circuit further switches the pulse timing for different luminances to improve the ghosting problem, the display effect and power consumption of the electronic device can both reach an optimal level.

[0021] In a possible implementation manner, the display driving integrated circuit is used to output the second uncompensated image data to the display panel according to the first uncompensated image data. In a high-luminance scenario, there is no need to compensate the image data, which can reduce the power consumption of the electronic device and simplify the logic of the electronic device.

[0022] In a possible implementation manner, after receiving the second initial image data and the second compensation instruction, the driving controller is further used to output the first auxiliary compensation instruction to the display driving integrated circuit; the display driving integrated circuit is used to output the second compensated image data to the display panel according to the first auxiliary compensation instruction and the first uncompensated image data. In a high-luminance scenario, when there is no high requirement for compensation, the display driving integrated circuit can compensate the image data. The processing scheme of the display driving integrated circuit is relatively simple and has lower power consumption than that of the driving controller. Therefore, in a high-luminance scenario, using the display driving integrated circuit to compensate the image data can optimize the display effect while reducing the power consumption of the electronic device.

[0023] In a possible implementation, the third set brightness is greater than the second set brightness; the driving controller is further configured to: receive third initial image data and a third compensation instruction matching a sixth emission brightness, and output third compensation 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; wherein, the sixth emission brightness is greater than the second set brightness and less than the third set brightness. In the intermediate brightness scenario, both the driving controller and the display driving integrated circuit perform a certain degree of compensation on the image data, which can achieve the transition from only the driving controller compensating in the low brightness scenario to only the display driving integrated circuit compensating in the high brightness scenario, realizing the transitional switching between the two compensation schemes, making the display effect smoothly transition, and further optimizing the display effect.

[0024] In a possible implementation, the driving controller is further configured to: receive fourth initial image data and a fourth compensation instruction matching a seventh emission brightness, and output fifth compensation image data and a third auxiliary compensation instruction to the display driving integrated circuit; 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; wherein, the seventh emission brightness is greater than the sixth emission brightness 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; the compensation coefficient of the display driving integrated circuit for the fifth compensation image data is greater than the compensation coefficient of the display driving integrated circuit for the third compensation image data. In the intermediate brightness scenario, both the driving controller and the display driving integrated circuit perform a certain degree of compensation on the image data, and as the brightness gradually increases, the compensation degree of the display driving integrated circuit for the image data gradually increases until entering the high brightness scenario, where only the display driving integrated circuit compensates the image data completely. The gradual switching between the two compensation schemes is realized, making the display effect smoothly transition, and further optimizing the display effect.

[0025] In a possible implementation, the first set brightness is greater than the third set brightness. Or, the first set brightness is less than the second set brightness. That is to say, the first set value does not fall between the second set value and the third set value. Then, when the electronic device interchanges the first pulse timing and the second pulse timing, the compensation scheme executed by the electronic device is either only the driving controller compensates or only the display driving integrated circuit compensates, and 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 the electronic device when the pulse timing is switched, thereby optimizing the display effect variation problem caused by the change of the pulse timing.

[0026] In a possible implementation, the display panel includes an array substrate and a plurality of light-emitting devices disposed on the array substrate; the light-emitting devices include a first electrode layer, a first light-emitting layer, a conductive connection layer, a second light-emitting layer, and a second electrode layer sequentially disposed on the array substrate, and the first light-emitting layer and the second light-emitting layer are configured to emit light of the same color. When the light-emitting devices in the display panel include multiple light-emitting layers, problems such as smear, flash, image quality, and power consumption of the electronic device can be optimized.

[0027] In a sixth aspect of the embodiments of the present application, a driving method for an electronic device is provided. The electronic device includes a display driving integrated circuit and a display panel; the driving method includes: the display driving integrated circuit receives a first brightness instruction characterizing 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 characterizing a second light-emitting brightness, and outputs 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 the frequency of the first reset start signal, f2 is the frequency of the second reset start signal, f3 is the frequency of the first light-emitting control start signal, and f4 is the frequency of the second light-emitting control start signal; f3≥f4, f1≦f3, f2≦f4. And f1>f2, or, f1≥720HZ and f1 = f2. And / or, the driving controller receives first initial image data and a first compensation instruction matching a fourth light-emitting brightness, and outputs first compensated image data to the display driving integrated circuit; the driving controller receives second initial image data and a second compensation instruction matching a fifth light-emitting brightness, and outputs first uncompensated image data to the display driving integrated circuit; the fourth light-emitting brightness is less than a second set brightness, the fifth light-emitting brightness 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 the present application are the same as those of the electronic device provided in the fifth aspect, and will not be elaborated here.

[0028] In a possible implementation, on the basis that the display driving integrated circuit receives the first brightness instruction and the second brightness instruction, the driving method further includes: the display driving integrated circuit receives a third brightness instruction characterizing a third light-emitting brightness, and outputs 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; the duty cycle of the first light-emitting control start signal is greater than the duty cycle of the third light-emitting control start signal; f5 = f1, f5≦f6, f5 is the frequency of the third reset start signal, and f6 is the frequency of the third light-emitting control start signal.

[0029] In a possible implementation, after the driving controller outputs first uncompensated image data to the display driving integrated circuit, the driving method further includes: the display driving integrated circuit outputs second uncompensated image data to the display panel according to the first uncompensated image data.

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

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

[0032] In a possible implementation, the driving method further includes: the driving controller receives fourth initial image data and a fourth compensation instruction matching a seventh emission luminance, outputs fifth compensated image data and a third auxiliary compensation instruction to the display driving integrated circuit; the display driving integrated circuit receives the fifth compensated image data and the third auxiliary compensation instruction, and outputs sixth compensated image data to the display panel; wherein, the seventh emission luminance is greater than the sixth emission luminance and less than the third set luminance; 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; 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. Description of the Drawings

[0033] Figure 1 A schematic structural diagram of an electronic device provided by an embodiment of the present application;

[0034] Figure 2A A schematic topological structure diagram of a pixel circuit provided by an embodiment of the present application;

[0035] Figure 2B A driving timing diagram of a pixel circuit provided by an embodiment of the present application;

[0036] Figure 2C A schematic structural diagram of a display panel provided by an embodiment of the present application;

[0037] Figure 2DAn equivalent topology diagram of a light-emitting device provided by an embodiment of the present application;

[0038] Figure 2E A schematic structural diagram of a light-emitting control signal generation circuit provided by an embodiment of the present application;

[0039] Figure 3 A driving timing diagram of a display panel illustrated by an embodiment of the present application;

[0040] Figure 4 A driving timing diagram of a display panel provided by an embodiment of the present application;

[0041] Figure 5 A comparison diagram of the improvement of the smear problem of different products provided by an embodiment of the present application;

[0042] Figure 6 Another driving timing diagram of a display panel provided by an embodiment of the present application;

[0043] Figure 7 A comparison diagram of the duty cycle in different pulse timings provided by an embodiment of the present application;

[0044] Figure 8A A schematic diagram of an electronic device implementing image data compensation provided by an embodiment of the present application;

[0045] Figures 8B - 8D A timing diagram of a compensation scheme provided by an embodiment of the present application;

[0046] Figure 9A Another schematic diagram of an electronic device implementing image data compensation provided by an embodiment of the present application;

[0047] Figure 9B Another timing diagram of a compensation scheme provided by an embodiment of the present application;

[0048] Figure 10 A schematic diagram of the cooperation between the timing switching and compensation switching of different products provided by an embodiment of the present application. Detailed implementation manners

[0049] Next, the technical solutions in the embodiments of the present application will be described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments.

[0050] Hereinafter, terms such as "second", "first", etc. are only used for convenience of description and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "second", "first", etc. may explicitly or implicitly include one or more such features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0051] In addition, in the embodiments of the present application, orientation terms such as "upper", "lower", "left", "right", etc. may include but are not limited to being defined relative to the schematic placement of components in the drawings. It should be understood that these directional terms may be relative concepts, and they are used for relative description and clarification, and they may change accordingly with the change of the orientation of the components placed in the drawings.

[0052] In the embodiments of the present application, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" may be a fixed connection, a detachable connection, or integrated; it may be directly connected or indirectly connected through an intermediate medium. In addition, the term "coupled" may be a direct electrical connection or an indirect electrical connection through an intermediate medium. The term "contact" may be direct contact or indirect contact through an intermediate medium.

[0053] In the embodiments of the present application, "and / or" describes the association relationship of associated objects and indicates that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone, where A and B may be singular or plural. The character " / " generally indicates that the associated objects before and after are an "or" relationship.

[0054] An embodiment of the present application provides an electronic device, which may be a foldable electronic device, for example. The electronic device may be a consumer electronic product, a home electronic product, a vehicle-mounted electronic product, or a financial electronic product. Among them, consumer electronic products such as mobile phones, tablets, laptop computers, e-readers, personal computers (PCs), personal digital assistants (PDAs), desktop monitors, smart wearable products (such as smart watches, smart bracelets), virtual reality (VR) electronic devices, augmented reality (AR) electronic devices, mixed reality (MR) electronic devices, artificial intelligence (AI) electronic devices, drones, etc. Home electronic products such as smart door locks, TVs, refrigerators, rechargeable small household appliances (such as soymilk makers, floor cleaning robots), etc. Vehicle-mounted electronic products such as vehicle navigation devices, in-vehicle DVDs, etc. Financial electronic products such as ATM machines, electronic devices for self-service business handling, etc.

[0055] The embodiment of the present application does not impose any special restrictions on the specific form of the above-mentioned electronic device. For the convenience of description, the following embodiments are all exemplified by taking the electronic device as a mobile phone.

[0056] Figure 1 It is a schematic structural diagram of an electronic device provided by an embodiment of the present application.

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

[0058] The driving controller 30 serves as the core of the electronic device 1 and is used for overall system processing and control. The driving controller 30 is coupled to the display module 40. The driving controller 30 receives an image signal and a control signal (such as that provided by a central processing unit (CPU)). The driving controller 30 outputs image data that matches the interface specification of the display module 40 according to the image signal. The driving controller 30 includes, for example, a system on chips (SOC). The driving controller 30 can be coupled to the display module 40 through a mobile industry processor interface (MIPI). Of course, the driving controller 30 can also be coupled to the display module 40 through other serial / deserial (SerDes) high-speed interfaces.

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

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

[0061] For example, the display driving integrated circuit 20 receives a data control signal and image data from the driving controller 30. The display driving integrated circuit 20 converts the image data into a data signal and outputs the data signal to a plurality of data signal lines. The data signal is an analog voltage corresponding to the gray level value of the image data. The display driving integrated circuit 20 is also used to output scanning control signals such as a clock signal, a gate start signal STV, and a reset signal required for display to the display panel 10. The display driving integrated circuit 20 includes, for example, a display drive integrated circuit (DDIC).

[0062] The display panel 10 serves as a display data presentation unit for presenting the display and control data sent by the driving controller 30. By way of example, the display panel 10 is a self-emitting display module 40 such as an organic light emitting diode (OLED) display module 40, an active-matrix organic light-emitting diode (AMOLED) display module 40, a mini organic light-emitting diode (Mini-OLED) display module 40, a micro light-emitting diode (Micro-LED) display module 40, a micro organic light-emitting diode (Micro-OLED) display module 40, a quantum dot light emitting diodes (QLED) display module 40, etc. At this time, the display panel 10 can be a rigid display panel, or the display panel 10 can also be a flexible display panel.

[0063] For any of the above display panels 10, the display panel 10 includes an active area (AA) and a non-display area (BB) located around the active area AA. The active area AA is used for displaying images. The active area AA includes a plurality of sub pixels (SP), and a pixel circuit 11 is provided in each sub pixel. The pixel circuit 11 receives the data signal provided by the display driving integrated circuit 20. The non-display area BB includes a driving circuit, and the driving circuit receives the scan control signal provided by the display driving integrated circuit 20.

[0064] In this application, the pixel circuit 11 is described by taking the arrangement in a matrix form as an example. The pixel circuits 11 arranged in a row along the horizontal direction X are called the same row of pixel circuits 11, and the pixel circuits 11 arranged in a row along the vertical direction Y are called the same column of pixel circuits 11.

[0065] In some embodiments, the pixel circuit 11 generally includes a driving circuit composed of multiple transistors and a light-emitting device. A driving current is generated by the driving circuit to drive the light-emitting device to emit light, so as to realize the light emission of the pixel circuit 11. Multiple pixel circuits 11 are arranged in an array on a substrate. For example, a structure including a substrate and multiple driving circuits arranged in an array is called an array substrate. Multiple light-emitting devices are arranged on the array substrate, and the light-emitting devices are coupled to the pixel circuits one by one. Or it can be understood that the display panel 10 includes an array substrate and multiple light-emitting devices. The array substrate includes a substrate and driving circuits arranged in an array, and the driving circuits and the light-emitting devices are coupled to form the pixel circuit 11.

[0066] Figure 2A Schematic diagram of a topological structure of a pixel circuit provided by an embodiment of the present application Figure 2B Driving timing diagram of a pixel circuit provided by an embodiment of the present application

[0067] In some embodiments, as Figure 2A shown, the pixel circuit 11 includes an anode reset circuit 111, a second node initialization circuit 112, a first node initialization circuit 113, a writing and threshold compensation circuit 114, a light-emitting control circuit 115, and a light-emitting device 116. Figure 2A The pixel circuit 11 shown is only for illustration and is not subject to any limitation.

[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 writing 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 rest of the transistors are switching transistors. The first node initialization circuit 113 and the writing and threshold compensation circuit 114 share the third transistor T3. The light-emitting device 116 is, for example, an OLED.

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

[0070] In the initialization stage t1:

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

[0072] In the initialization stage t1, the first transistor T1, the third transistor T3, and the fourth transistor T4 are respectively turned on, realizing the 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 serve as switching transistors respectively, 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. Therefore, in the initialization stage t1, the control electrode voltage control of the first transistor T1, the voltage control of the first node N1, the voltage control of the second node N2, and the voltage control of the fourth node N4 are realized, so that the control electrode voltage of the first transistor T1, the voltage of the first node N1, the voltage of the second node N2, and the voltage of the fourth node N4 are respectively the first initialization voltage of the first initialization voltage terminal Vinit1, that is, the voltage reset of the control electrode of the first transistor T1, the first node N1, the second node N2, and the fourth node N4 is realized.

[0073] In the threshold compensation stage t2:

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

[0075] In the threshold compensation stage t2, the second transistor T2, the third transistor T3, and the first transistor T1 are turned on respectively, storing the data voltage of the data voltage terminal Vd in the storage capacitor Cst, completing the writing of the data voltage. Also, the threshold voltage of the first transistor T1 is compensated. The compensation process of the threshold voltage of the first transistor T1 can be considered as the process of the first transistor T1 changing from the on state to the off state.

[0076] In the light-emitting stage t3:

[0077] The light-emitting control signal em of the light-emitting control signal terminal EM changes from high level to low level, and then from low level to high level. Thus, the sixth transistor T6 and the fifth transistor T5 change from off state to on state, and then from on state to off state. The second control signal s2 of the second control signal terminal S2 and the third control signal s3 of the third control signal terminal S3 both remain at low level, and the fourth transistor T4 and the third transistor T3 both remain in the off state. The first control signal s1 of the first control signal terminal S1 and the fourth control signal s4 of the fourth control signal terminal S4 both remain at high level, and the seventh transistor T7, the eighth transistor T8, and the second transistor T2 all remain in the off state.

[0078] In the light-emitting stage t3, the fifth transistor T5, the first transistor T1, and the sixth transistor T6 are turned on respectively, transmitting a 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 of the first control signal terminal S1 changes from high level to low level, and then from low level to high level. Thus, the seventh transistor T7 and the eighth transistor T8 change from off state to on state, and then from on state to off state. The second control signal s2 of the second control signal terminal S2 and the third control signal s3 of the third control signal terminal S3 always remain at low level, and the fourth control signal s4 of the fourth control signal terminal S4 and the light-emitting control signal em of the light-emitting control signal terminal EM always remain at high level. The third transistor T3, the fourth transistor T4, the second transistor T2, the fifth transistor T5, and the sixth transistor T6 all remain in the off state.

[0081] In the anode reset stage t, the seventh transistor T7 and the eighth transistor T8 are turned on, realizing the control of the voltage of the second node N2 and the voltage of the anode of the light-emitting device 116, making 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, realizing the reset of the voltage of the second node N2 and the anode of the light-emitting device 116.

[0082] When the display panel 10 displays at different brightness levels, the voltages received by the gates of each pixel circuit 11 in the display panel 10 are dynamically adjusted.

[0083] With the development of the technology of the display panel 10, the display panel 10 gradually evolves towards higher brightness. While obtaining higher brightness, the power consumption of the display panel 10 will also increase accordingly. The power consumption of the 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 driving integrated circuit 20 to provide driving signals.

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

[0085] Figure 2C Schematic diagram of the structure of a display panel provided by an embodiment of the present application Figure 2D Equivalent topology diagram of a light-emitting device provided by an embodiment of the present application

[0086] In some embodiments, as Figure 2C 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 the array substrate.

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

[0089] For example, if the first electrode layer serves as the anode of the light-emitting device 116, the second electrode layer serves as the cathode of the light-emitting device 116, a relatively high potential is applied to the first electrode layer, and a relatively low potential is applied to the second electrode layer, then holes are injected from the first electrode layer into the first light-emitting layer, electrons are injected from the second electrode layer into the first light-emitting layer through the conductive connection layer, and the energy generated after the holes and electrons recombine in the first light-emitting layer can excite the first light-emitting layer to emit light. Similarly, holes are injected from the first electrode layer into the second light-emitting layer through the conductive connection layer, electrons are injected from the second electrode layer into the second light-emitting layer, and the energy generated after the holes and electrons recombine in the second light-emitting layer can excite the second light-emitting layer to emit light. Both the second electrode layer and the conductive connection layer are transparent conductive layers, and the light of the same color emitted by the first light-emitting layer and the second light-emitting layer is superimposed and emitted from the side of the second electrode layer.

[0090] At this time, as Figure 2D 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, and the first sub-light-emitting device OLED1 and the second sub-light-emitting device OLED2 are connected in series through the conductive connection 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 only a schematic illustration in

[0092] Next, a schematic illustration will be given of 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-emitting control signal terminal EM in the pixel circuit 11.

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

[0094] Figure 2E This is a schematic structural diagram of a light-emitting control signal generation circuit provided by an embodiment of the present application.

[0095] In some embodiments, 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 of 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 enable signal, the first-stage shift register RS1 of the light emission control signal generation circuit 12 starts to work, and then, the multi-stage shift registers start to work one by one.

[0096] Exemplarily, the light emission control start signal STV-em is provided by the display driving integrated circuit 20. The display panel 10 is used to receive the light emission control start signal STV-em sent by the display driving 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 understood as an anode reset control signal generation circuit) 13, and the first control signal generation circuit 13 is used to transmit the first control signal s1 to 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 driving 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 further includes a second control signal generation circuit 14, and the second control signal generation circuit 14 is used to transmit the 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 driving 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 further includes a third control signal generation circuit 15, and the third control signal generation circuit 15 is used to transmit the 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 driving 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 further includes a fourth control signal generation circuit 16, which is configured to transmit a fourth control signal s4 to each row of pixel circuits 11. The write start signal STV-s4 required by the fourth control signal generation circuit 16 is provided by the display driving 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, by adjusting the timings 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, the display state of the display panel 10 can be adjusted.

[0102] Figure 3 It is a driving timing diagram of a display panel illustrated in an embodiment of the present application.

[0103] In some embodiments, at different brightness levels, the driving timing of the display panel 10 will change correspondingly.

[0104] As Figure 3 shown, at high brightness, in one frame, the light emission control start signal STV-em that uses fewer effective pulses (low-level signals) will be used, and the frequency of the light emission control start signal STV-em is 3 * 120HZ. At high brightness, the differences in different high-brightness driving currents are relatively large. By changing the magnitude of the driving current, the light emission brightness can be adjusted. It is generally referred to as direct current (DC) dimming or a DC-like dimming mode.

[0105] As Figure 3 shown, at low brightness, in one frame, the light emission control start signal STV-em includes multiple effective pulses (low-level signals), and the frequency of the light emission control start signal STV-em is 12 * 120HZ. It is generally referred to as the pulse width modulation (PWM) dimming mode. In the low-brightness mode, the differences in different low-brightness driving currents are relatively small, and it is relatively difficult to adjust the light emission brightness solely by the magnitude of the driving current. At this time, it is necessary to combine the duty cycle of the light emission control start signal STV-em to improve the discrimination of the driving current and achieve the discrimination of low brightness. Average current = on-time * current during on-time. When the average current is fixed, by reducing the duty cycle of the light emission control start signal STV-em to shorten the on-time, the current during on-time can be increased. The larger the current during on-time, the more accurate the precision control, so as to distinguish different low light emission brightness levels and improve the display image quality. At the same time, when the duty cycle is fixed, by increasing the number (frequency) of effective pulses of the light emission control start signal STV-em, the interval time between two adjacent light emissions can be reduced, and the flash problem can be improved.

[0106] Under low brightness (PWM dimming mode) and high brightness (DC dimming mode), the frequencies of 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 remain the same without adjustment. For example, Figure 3 The timing diagram of the reset start signal STV-s1 is shown. Under low brightness and high brightness, the frequency of the reset start signal STV-s1 is 3 * 120 HZ (the number of effective pulses (low-level signals) is 3).

[0107] Through the above driving method, high-brightness and low-power emission of the light-emitting device 116 including 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 the first sub-light-emitting device OLED1 and the second sub-light-emitting device OLED2 connected in series, it is equivalent to that the light-emitting device 116 includes the first parasitic capacitor C1 and the second parasitic capacitor C2 connected in series. When there are differences in the capacitance values of the first parasitic capacitor C1 and the second parasitic capacitor C2, during the light-emitting stage, the parasitic capacitor with a smaller rechargeable capacity is charged first and emits light earlier, and the light-emitting current of the corresponding light-emitting device is larger, resulting in over-brightness. The greater the difference in the rechargeable capacities of the first parasitic capacitor C1 and the second parasitic capacitor C2, the longer the duration of over-brightness, and the greater the brightness difference. During initial preparation, it is difficult to completely solve the differences in the first parasitic capacitor C1 and the second parasitic capacitor C2 in the light-emitting device 116 from the design and process. During subsequent use, it is also impossible to predict the possible differences in the first parasitic capacitor C1 and the second parasitic capacitor C2. The brightness difference between the first sub-light-emitting device OLED1 and the second sub-light-emitting device OLED2 will cause a serious ghosting problem in the display panel 10 during the display process. Moreover, in a low-brightness scenario, the peak light-emitting current of the light-emitting device is smaller. After shunting, the currents charging the first parasitic capacitor C1 and the second parasitic capacitor C2 are smaller. When the difference in the rechargeable capacities of the first parasitic capacitor C1 and the second parasitic capacitor C2 is fixed, the smaller the charging current, the greater the time difference for the first parasitic capacitor C1 and the second parasitic capacitor C2 to be charged, and the longer the duration of over-brightness, further exacerbating the ghosting phenomenon at low brightness. Moreover, the display panel 10 including the above light-emitting device 116 generally also has problems such as uneven low gray-scale display, uneven sand grain feeling (dirty mura), serious stroboscopic, and high power consumption.

[0109] Based on this, an electronic device 1 provided by an embodiment of the present application includes the above-mentioned display panel 10, display driver integrated circuit 20, and drive controller 30, which is used to improve the problem of display ghosting at low brightness, and can also improve problems such as uneven display at low gray levels, uneven dirty mura, severe stroboscopic, and high power consumption.

[0110] Figure 4 It is a driving timing diagram of a display panel provided by an embodiment of the present application.

[0111] An embodiment of the present application provides a display driver integrated circuit 20. The display driver integrated circuit 20 is applied to the electronic device 1 provided by the embodiment of the present application and is used to drive the display panel 10 in the electronic device 1.

[0112] The display driver integrated circuit 20 is further configured to receive a first brightness instruction representing a first emission brightness, and output a first reset start signal STV-s11 and a first emission control start signal STV-em1 as shown in Figure 4 to the display panel 10.

[0113] The display driver integrated circuit 20 is further configured to receive a second brightness instruction representing a second emission brightness, and output a second reset start signal STV-s12 and a second emission control start signal STV-em2 as shown in Figure 4 to the display panel 10.

[0114] The first emission brightness is less than a first set brightness, and the second emission brightness is greater than the first set brightness. The first emission brightness can be understood as the brightness in the low brightness mode, and the second emission brightness can be understood as the brightness in the high brightness mode. The first set brightness is a critical division value between low brightness and high brightness, and the embodiment of the present application does not limit the values of the first set brightness and the second set brightness.

[0115] The first brightness instruction and the second brightness instruction can be provided by the drive controller 30 in the electronic device 1, for example. Exemplarily, the user (or CPU) adjusts the brightness bar of the electronic device 1, and the drive controller 30 determines the brightness requirement situation in combination with the touch position.

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

[0117] When the brightness requirement is greater than the first set value, the driving controller 30 sends a second brightness instruction to the display driving integrated circuit 20. The display driving integrated circuit 20 receives the second instruction and issues a second type of pulse timing B including a second reset start signal STV-s12 and a second light emission control start signal STV-em2.

[0118] The type of the pulse timing sent by the display driving integrated circuit 20 matches the interface type of the display panel 10. For example, the display panel 10 and the display driving integrated circuit 20 are coupled through an MIPI interface, and the type of the pulse timing sent by the display driving integrated circuit 20 satisfies 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] Exemplarily, as Figure 4 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 a low brightness scenario can improve the flash screen problem. In a high brightness scenario, without affecting the display effect, reducing the frequency of the light emission control signal em can reduce the power consumption of the display driving integrated circuit 20.

[0121] Alternatively, exemplarily, 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 in a low brightness scenario is the same as that in a high brightness scenario. The display driving integrated circuit 20 does not need to change the frequency in different scenarios, which can simplify the structure of the display driving integrated circuit 20.

[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 time between two adjacent light emissions can be reduced, improving the flash screen problem.

[0123] From the above description of the driving method of the pixel circuit 11, it can be seen that during the anode reset stage t, the anode reset circuit 111 is turned on, and the light emission control circuit 115 needs to remain off. To Figure 2AFor the pixel circuit 11, when the first control signal s1 is a low-level enable signal, the light emission control signal em needs to be a high-level turn-off signal. Therefore, before the first control signal s1 becomes low level each time, the light emission control signal em needs to become high level. That is to say, the number of times the light emission control signal em becomes high level should be greater than or equal to the number of times the first control signal s1 becomes low level. That is, the frequency f3 of the first light emission control start signal STV-em1 should be greater than or equal to the frequency f1 of the first reset start signal STV-s11.

[0124] Exemplarily, 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. Meeting the requirement of the frequency f1 of the first reset start signal STV-s11 with the minimum frequency f3 can reduce the power consumption of the display driving integrated circuit 20.

[0125] Or, exemplarily, as Figure 4 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. Under the condition of 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 problem of screen flashing 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 to say, in low-brightness scenarios, the number of times the anode of the light-emitting device is reset is more than that in high-brightness scenarios, and the number of times the anode of the light-emitting device is reset is increased in low-brightness scenarios.

[0128] Exemplarily, the frequency f1 of the first reset start signal STV-s11 is greater than or equal to 6 * 120HZ (720HZ). That is to say, within one image frame, the first reset start signal STV-s11 should at least appear 6 times as a low-level enable signal. That is, within one image frame, the anode of the light-emitting device should be reset at least 6 times. For example, the frequency f1 of the first reset start signal STV-s11 is 720HZ, 1080HZ or 1440HZ, etc., to ensure the improvement effect on the ghosting problem of the display panel 10 in low-brightness scenarios.

[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 to say, within one image frame, the second reset start signal STV-s12 should have at least 3 low-level start signals. Namely, within one image frame, the anode of the light-emitting device should be reset at least 3 times. For example, the frequency f2 of the second reset start signal STV-s12 is 360 HZ, 720 HZ, 1080 HZ, etc. To ensure that in a high-brightness scenario, the anode of the light-emitting device is reset at least 3 times, the smear problem of the display panel 10 can be ignored, and at the same time, the power consumption of the electronic device 1 is reduced.

[0130] In the embodiments of the present application, 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-emitting 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-emitting control start signal STV-em2 can be completely equal, not completely equal, or completely unequal.

[0131] The display driving integrated circuit 20 provided by the embodiment of the present application outputs different driving timings in low-brightness scenarios and high-brightness scenarios, and drives the display panel 10 with different timings. In a low-brightness scenario, the display driving integrated circuit 20 outputs a first reset start signal STV-s11 with a high frequency, increasing the number of times of resetting the anode of the light-emitting device. Resetting the anode 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, and clearing the duty cycle corresponding to the residual current. Average current = on-time * current at turn-on. After clearing the remaining duty cycle, the on-time decreases. At the same average current, when the on-time decreases, the current at turn-on will increase (the peak current increases). That is to say, the charging current of the first parasitic capacitor C1 and the second parasitic capacitor C2 will increase. The larger the charging current (peak current), the smaller the time difference for the first parasitic capacitor C1 and the second parasitic capacitor C2 to complete charging, and the shorter the over-bright duration, thereby improving the problem of display ghosting in low-brightness scenarios. At the same time, in a high-brightness scenario, since the ghosting problem can be ignored, the display driving integrated circuit 20 outputs a second reset start signal STV-s12 with a low frequency. To reduce the power consumption of the electronic device 1 on the basis of solving the display ghosting problem of the electronic device 1. In addition, 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-emitting control start signal STV-em1, then, while the frequency f1 of the first reset start signal STV-s11 increases, the frequency f3 of the first light-emitting control start signal STV-em1 also increases. While enabling the light-emitting device 116 to have a larger peak current (peak brightness), the interval time between two adjacent light emissions is reduced. While improving the ghosting problem, the flash screen problem is further improved and the display image quality is enhanced. Based on this, the display driving integrated circuit 20 provided by the embodiment of the present application can take into account and optimize problems such as ghosting, flash screen, image quality, and power consumption of the electronic device 1.

[0132] In some 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 720HZ. That is, the first reset start signal STV-s11 includes at least 6 low-level effective pulses. For example, the frequency f1 of the first reset start signal STV-s11 is 720HZ, 1080HZ, 1440HZ, etc.

[0133] Figure 5 It is a comparison chart of the improvement of the ghosting problem of different products provided by the embodiment of the present application.

[0134] Such as Figure 5As shown, when the value of the first set brightness is different, the improvement of the ghosting problem of the electronic device 1 is different, and the value of the first set brightness can be selected according to different requirements.

[0135] In the first product, the first set brightness is at the brightness demarcation point between severe ghosting and slight ghosting. The first pulse timing A is used to drive at the brightness with severe ghosting, and the second pulse timing B is used to drive at the brightness with slight or negligible ghosting. This is to improve the severe ghosting phenomenon in the electronic device 1 while reducing the power consumption of the electronic device 1.

[0136] In the second product, the first set brightness is at the brightness demarcation point between slight ghosting and negligible ghosting. The first pulse timing A is used to drive at the brightness with severe and slight ghosting, and the second pulse timing B is used to drive at the brightness with negligible ghosting. This is to completely eliminate the ghosting problem in the electronic device 1.

[0137] In the third product, the first set brightness is in the brightness range with negligible ghosting. The first pulse timing A is used to drive at the brightness with severe and slight ghosting, and also at a part of the brightness that is slightly higher and has negligible ghosting. The second pulse timing B is used to drive at the brightness that is particularly high and has negligible ghosting. This is to completely eliminate the ghosting problem in the electronic device 1 and avoid the phenomenon of slight ghosting at the brightness that is slightly higher (with negligible ghosting at the factory) due to the aging of the electronic device 1.

[0138] In some embodiments, the value range of the first set brightness can be, for example, 10 nit to 200 nit. For example, the first set brightness is 10 nit, 30 nit, 50 nit, 70 nit, 90 nit, 100 nit, 110 nit, 130 nit, 150 nit, 170 nit, 190 nit or 200 nit, etc. By reasonably setting the value of the first set brightness, the ghosting problem of the electronic device 1 can be improved while taking into account the power consumption problem of the electronic device 1.

[0139] In some embodiments, as Figure 5 shown, the first emission brightness is the emission brightness in the first brightness interval, and the second emission brightness is the emission brightness in the third brightness interval. Or it can be understood that the first emission brightness is not a point value, but any value within an interval. Similarly, the second emission brightness is not a point value, but any value within an interval.

[0140] For example, the first emission luminance is any luminance within the range from the minimum value to the first set luminance. As long as the luminance of the display panel 10 is between the minimum value and the first set luminance, the display panel 10 executes the first type of pulse timing A. When the luminance of the display panel 10 is between the first set luminance and the maximum value, the display panel 10 executes the second type of pulse timing B.

[0141] Figure 6 This is another driving timing diagram of the display panel provided by the embodiment of the present application.

[0142] In some other embodiments, the display driving integrated circuit 20 is further configured to receive a third luminance instruction characterizing the third emission luminance, and output a third type of pulse timing C including a third reset start signal STV-s13 and a third emission control start signal STV-em3 to the display panel 10.

[0143] The third emission luminance is less than the first set luminance and less than the first emission luminance. That is to say, when the emission luminance is less than the first set value, two or more different pulse timings may also occur.

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

[0145] Then, 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. Therefore, when the emission luminance is the third emission luminance, the smear problem of the electronic device 1 can still be improved. The principle of improving the smear problem, improving the flash problem, and enhancing the display image quality is the same as the principle of improving the smear problem when the emission luminance is the first emission luminance, and will not be elaborated here.

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

[0147] Duty cycle = sum of the durations of all low-level pulses in one frame / duration of one frame, and it can be, for example 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. It can also be that the duration of some low-level pulses in the first light-emitting control start signal STV-em1 is greater than the duration of the low-level pulses in the third light-emitting control start signal STV-em3. The duration of some other low-level pulses in the first light-emitting control start signal STV-em1 can be less than or equal to the duration of the low-level pulses in the third light-emitting control start signal STV-em3. In addition, the durations of multiple low-level pulses in the third light-emitting control start signal STV-em3 can be exactly equal, not exactly equal, or completely unequal. As long as the sum of the durations of all low-level pulses within one frame in the first light-emitting control start signal STV-em1 is greater than the sum of the durations of all low-level pulses within one frame in the third light-emitting control start signal STV-em3, the duty cycle of the first light-emitting control start signal STV-em1 can be made greater than the duty cycle of the third light-emitting control start signal STV-em3.

[0148] In some other embodiments, the duty cycle of the first light-emitting control start signal STV-em1 can also be equal to the duty cycle of the third light-emitting control start signal STV-em3. For example, in a low-brightness scenario, the pulse timings at various low brightness levels are the same.

[0149] In some embodiments, the first light-emitting brightness is a specific point value. And / or, the third light-emitting brightness is a specific point value.

[0150] In some other embodiments, the first light-emitting brightness is the light-emitting brightness within a first brightness range. And / or, the third light-emitting brightness is the light-emitting brightness within a second brightness range. Or it can be understood that the first light-emitting brightness is not a point value, but any value within an interval. Similarly, the third light-emitting brightness is not a point value, but any value within an interval.

[0151] For example, the third light-emitting brightness is any brightness from the minimum value to the fourth set brightness range. As long as the brightness of the display panel 10 is between the minimum value and the fourth set brightness, the display panel 10 executes the third pulse timing C. When the brightness of the display panel 10 is between the fourth set brightness and the first set value, the display panel 10 executes the first pulse timing A. The fourth set value is less than the first set value.

[0152] Average current = turn-on time * current at turn-on. 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 turn-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. Then, 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 cross-voltage of the light-emitting device 116 when executing the first pulse timing A is less than the charging cross-voltage of the light-emitting device 116 when executing the third pulse timing C. And the greater the charging cross-voltage, the greater the power consumption. Then, when both the first pulse timing A and the third pulse timing C can optimize the display ghosting problem in the low-brightness scenario, increasing the duty cycle of the light-emitting control start signal can reduce the power consumption of the electronic device 1. From another perspective, the greater the peak current, the better the improvement effect of the electronic device 1 on ghosting, screen flickering, and image quality problems in the low-brightness scenario. Then, when both the first pulse timing A and the third pulse timing C can optimize the display ghosting problem in the low-brightness scenario, reducing the duty cycle of the light-emitting control start signal can improve the improvement effect of ghosting, screen flickering, and image quality problems in the low-brightness scenario. Therefore, when the display driving integrated circuit 20 has the ability to output the first pulse timing A and the third pulse timing C, the ghosting, screen flickering, image quality, and power consumption problems of the electronic device 1 can be further optimized. In addition, the greater the duty cycle of the light-emitting control start signal, the smaller the peak current, the smaller the required gamma value (gamma code), the greater the data voltage, the greater 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 chart of duty cycles in different pulse timings provided by the embodiments of the present application.

[0154] In some embodiments, as Figure 7 shown, the display driving integrated circuit is further configured to receive a fourth brightness instruction representing the fourth light-emitting brightness, and output a fourth pulse timing D including a fourth reset start signal and a fourth light-emitting control start signal to the display panel.

[0155] The fourth light-emitting brightness is less than the first set brightness and less than the first light-emitting brightness and the third light-emitting brightness. That is to say, in the case where the light-emitting brightness is less than the first set value, there will also be multiple different pulse timings.

[0156] The frequency of the fourth reset start signal is f7, 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 be equal or may not be equal.

[0157] On this basis, in the first embodiment, as Figure 7 shown, 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 less than the duty cycle of the first light emission control start signal STV-em1. That is, among the three, the duty cycle of the fourth light emission control start signal STV-em4 is the smallest, and the duty cycle of the first light emission control start signal STV-em1 is the largest. For example, in a low brightness scenario, for different low brightness levels, the display driving integrated circuit 20 can generate start light emission control signals with different duty cycles.

[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 may 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. The embodiments of the present application do not limit this.

[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 a low brightness scenario, for different low brightness levels, in the extremely low brightness and relatively low brightness intervals, the duty cycle of the start light emission control signal generated by the display driving integrated circuit 20 is less than the duty cycle of the start light emission control signal generated by the display driving integrated circuit 20 in the general low brightness interval.

[0160] In the third embodiment, the duty ratio of the fourth light emission control start signal STV-em4 is smaller than the duty ratio of the third light emission control signal STV-em3, and the duty ratio of the third light emission control signal STV-em3 is equal to the duty ratio of the first light emission control start signal STV-em1. For example, in a low brightness scenario, for different low brightness levels, the duty ratio of the start light emission control signal generated by the display driving integrated circuit 20 in the extremely low brightness range is smaller than the duty ratio of the start light emission control signal generated by the display driving integrated circuit 20 in the relatively low brightness range. The duty ratio of the start light emission control signal generated by the display driving integrated circuit 20 in the relatively low brightness range is equal to the duty ratio of the start light emission control signal generated by the display driving integrated circuit 20 in the generally low brightness range.

[0161] In the fourth embodiment, the duty ratio of the fourth light emission control start signal STV-em4 is equal to the duty ratio of the third light emission control signal STV-em3 and is equal to the duty ratio of the first light emission control start signal STV-em1. For example, in a low brightness scenario, for different low brightness levels, the duty ratios of the light emission control signals that the display driving integrated circuit 20 can generate are the same.

[0162] Of course, the display driving integrated circuit 20 can also output more different pulse timings when the light emission brightness is less than the fourth light emission brightness. Among the multiple pulse timings, the duty ratios of the light emission control start signals are different. For example, as the light emission brightness increases, the duty ratios of the light emission control signals in the multiple pulse timings gradually increase. The frequencies of the light emission control signals in the multiple pulse timings can be the same or different. The frequencies of the reset start signals in the multiple pulse timings can be the same or different.

[0163] When the light emission brightness is greater than the first set brightness, the display driving integrated circuit 20 can output only one second type of pulse timing B, or the display driving integrated circuit 20 can output multiple different pulse timings. The frequencies of the light emission control signals in the multiple pulse timings can be the same or different. The duty ratios of the light emission control signals in the multiple pulse timings can be the same or different. The frequencies of the reset start signals in the multiple pulse timings can be the same or different.

[0164] By further refining the levels of the duty ratios of the light emission control signals, problems such as afterimage, screen flashing, image quality, power consumption, and yield of the electronic device 1 can be further optimized.

[0165] The display driving integrated circuit 20 provided by the embodiment of the present application can be applied to the display module 40 provided by the embodiment of the present application. The display driving integrated circuit 20 is coupled to the display panel 10 and is used to provide the light emission control start signal STV-em and the reset start signal STV-s1 for the display panel 10.

[0166] Figure 8A Schematic diagram for an electronic device provided by an embodiment of the present application to implement image data compensation Figures 8B - 8D Timing diagram of a compensation scheme provided by an embodiment of the present application

[0167] An embodiment of the present application further provides a driving controller 30. In some embodiments, as Figure 8A shown, the driving controller 30 is configured to receive first initial image data and a first compensation instruction matching a fourth emission luminance, and output first compensated image data to the display driving integrated circuit 20. For example, the driving controller 30 includes a first compensation module, and the first compensation module receives the first initial image data and the first compensation instruction matching the fourth emission luminance, and outputs the first compensated image data to the display driving integrated circuit 20.

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

[0169] The fourth emission luminance is less than the second set luminance, and the fifth emission luminance is greater than the third set luminance. The third set luminance is equal to the second set luminance, and the third set luminance may also be greater than the second set luminance. That is, the fourth emission luminance is less than the fifth emission luminance.

[0170] That is to say, the driving controller 30 and the driving integrated circuit 20 have the ability to execute the compensation scheme E. The compensation scheme E is: in a low-brightness scenario, the driving controller 30 compensates the received initial image data. In a high-brightness scenario, the driving controller 30 does not compensate the received initial image data. Whether in a low-brightness scenario or a high-brightness scenario, the display driving integrated circuit 20 does not compensate the received image data.

[0171] That is to say, in the compensation scheme E, in a low-brightness scenario, the driving controller 30 compensates the image data, but the display driving integrated circuit 20 does not compensate the image data. The compensation of the image data, for example, includes (demura) compensation for luminance difference, overdriving compensation (OD), etc.

[0172] By comparing the image data received by the driving controller 30 and the output image data, it can be determined whether the driving controller 30 has performed compensation processing on the image data. For example, according to the difference between the two image data, analyze whether there is block regularity and data regularity, so as to determine whether there is compensation, and further it can be speculated which type of compensation it belongs to.

[0173] In some embodiments, the display driving integrated circuit 20 does not compensate the received first uncompensated image data either. Directly based on the first uncompensated image data, after converting the first uncompensated image data into an analog signal, the first uncompensated image data after digital-to-analog conversion is output as the second uncompensated image data to the display panel 10.

[0174] Exemplarily, the display driving integrated circuit 20 includes a second compensation module. The second compensation module is configured to receive the first uncompensated image data and output the second uncompensated image data after digital-to-analog conversion to the display panel 10. In a high-brightness scenario, 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] As Figure 8B shown, in a high-brightness scenario, the display effect is relatively ideal, and the image data can be not compensated. Only in a low-brightness scenario, the compensation scheme E is adopted to compensate the image data. To reduce the power consumption of the driving controller 30 and the display driving integrated circuit 20.

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

[0177] That is to say, the driving controller 30 and the driving integrated circuit 20 have the ability to execute the compensation scheme F. The compensation scheme F is: in a high-brightness scenario, the driving controller 30 does not compensate the received initial image data, but issues a first auxiliary compensation instruction to the display driving integrated circuit 20. The display driving integrated circuit 20 compensates the first uncompensated image data sent by the driving controller 30 based on the first auxiliary compensation instruction, and after converting the data signal into an analog signal, outputs the second compensated image data.

[0178] Exemplarily, the display driving integrated circuit 20 includes a second compensation module. The second compensation module is configured to receive the first auxiliary compensation instruction and the first uncompensated image data, and output the second compensated image data after digital-to-analog conversion and compensation to the display panel 10.

[0179] In a high-brightness scenario, when there is no high demand for compensation, the image data can be compensated by the display driving integrated circuit 20. The processing solution of the display driving integrated circuit 20 is relatively simple and has lower power consumption than that of the driving controller 30. Therefore, in a high-brightness scenario, using the display driving integrated circuit 20 to compensate the image data can optimize the display effect while reducing the power consumption of the electronic device 1.

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

[0181] In some other embodiments, as Figure 8D shown, in a high-brightness scenario, compensation scheme E is also used to compensate the image data. To reduce the switching of compensation schemes and ensure the display effect. At this time, whether in a low-brightness scenario or a high-brightness scenario, compensation scheme E is used to compensate the image data.

[0182] When executing compensation scheme E, the compensation coefficients of the driving controller 30 for the image data at different brightness levels can be the same or different. Figure 8D Only taking the example that the compensation coefficients of the driving controller 30 for the image data at different brightness levels are the same for illustration.

[0183] In the electronic device 1 provided by the embodiments of the present application, after receiving the initial image data, if the driving controller 30 simultaneously receives the first compensation instruction matching the low emission brightness (the fourth emission brightness), the driving controller 30 executes the scheme of compensating the initial image data and outputs the compensated image data to the display driving integrated circuit 20. After the driving controller 30 receives the initial image data, if it simultaneously receives the second compensation instruction matching the high emission brightness (the fifth emission brightness), the driving controller 30 executes the scheme of not compensating the initial image data and outputs the uncompensated image data to the display driving integrated circuit 20. And the driving controller 30 has a high process node, strong processing ability, and good processing effect. Therefore, after receiving the initial image data, the driving controller 30 compensates the low-brightness images with a deep compensation demand, which can improve problems such as uneven low gray-scale display and uneven low gray-scale dirty mura in the electronic device 1. However, the driving controller 30 will not compensate the high-brightness images without high compensation demand to reduce the power consumption of the electronic device 1.

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

[0185] In some other embodiments, the display driving integrated circuit 20 further includes a timing switching module, and the switching output of the first pulse timing A and the second pulse timing B can be realized through the timing switching module. That is to say, while the electronic device 1 compensates the display effect through the driving controller 30, it also switches the pulse timing according to different brightness through the display driving integrated circuit 20 to improve the ghosting problem.

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

[0187] In some embodiments, the value ranges of the second set brightness and the third set brightness can be, for example, 10 nit to 200 nit. For example, the values of the second set brightness or the third set brightness can be 10 nit, 30 nit, 50 nit, 70 nit, 90 nit, 100 nit, 110 nit, 130 nit, 150 nit, 170 nit, 190 nit, or 200 nit, etc. To improve the problems of uneven low gray-scale display and dirty mura unevenness of the electronic device 1 while taking into account the power consumption problem of the electronic device 1.

[0188] Figure 9A A schematic diagram of another electronic device for realizing image data compensation provided by the embodiments of the present application. Figure 9B A timing diagram of another compensation scheme provided by the embodiments of the present application.

[0189] In some embodiments, as Figure 9A shown, the driving controller 30 is further configured to receive the third initial image data and the third compensation instruction matching the sixth emission brightness. For example, based on the third compensation instruction, after compensating the third initial image data through the first compensation module, the driving controller 30 outputs the third compensated image data and the second auxiliary compensation instruction to the display driving integrated circuit 20. The display driving integrated circuit 20 is configured 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, the display driving integrated circuit 20 outputs the fourth compensated image data to the display panel 10.

[0190] At this time, the third set brightness is greater than the second set brightness, the sixth emission brightness is greater than the second set brightness, and the sixth emission brightness is less than the third set brightness. That is to say, the sixth emission brightness is greater than the fourth emission brightness and less than the fifth emission brightness.

[0191] That is, the driving controller 30 and the display driving integrated circuit 20 have the ability to execute the compensation scheme G. The compensation scheme G is as follows: in the medium brightness scenario, the driving controller 30 compensates the received initial image data, outputs the compensated third compensated image data, and sends a second auxiliary compensation instruction to the display driving integrated circuit 20. The display driving integrated circuit 20 compensates the third compensated image data based on the second auxiliary compensation instruction, and after performing digital-to-analog conversion, outputs the fourth compensated image data.

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

[0193] In the medium brightness scenario, both the driving controller 30 and the display driving integrated circuit 20 compensate the image data to a certain extent, which can achieve the transition from the compensation scheme E in the low brightness scenario to the compensation scheme F in the high brightness scenario, realize the transition switching between the two compensation schemes, make the display effect smoothly transition, and further optimize the display effect.

[0194] In some embodiments, the driving controller 30 is further configured to receive the fourth initial image data and the fourth compensation instruction matching the seventh emission brightness. For example, based on the fourth compensation instruction, after compensating the fourth initial image data through the first compensation module, the driving controller 30 outputs the fifth compensated image data and the third auxiliary compensation instruction to the display driving integrated circuit 20. At this time, the display driving 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, the display driving integrated circuit 20 outputs the sixth compensated image data to the display panel 10.

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

[0196] That is to say, in the scenarios with the sixth emission brightness and the seventh emission brightness, the electronic device 1 executes the compensation scheme G. However, for different brightness levels, the compensation coefficients of the driving controller 30 and the display driving integrated circuit 20 for the image data are different.

[0197] Exemplarily, the compensation coefficient of the driving controller 30 for the fourth initial image data at the seventh emission brightness is less than the compensation coefficient of the driving controller 30 for the third initial image data at the sixth emission brightness. Or it can be understood that the brighter the emission brightness, the smaller the compensation coefficient of the driving controller 30.

[0198] The compensation coefficient of the display driving integrated circuit 20 for the fifth compensated image data at the seventh light-emitting brightness is greater than the compensation coefficient of the display driving integrated circuit 20 for the third compensated image data at the sixth light-emitting brightness. Or, it can be understood that the brighter the light-emitting brightness, the greater the compensation coefficient of the display driving integrated circuit 20.

[0199] For example, Figure 9B In, in a scenario where the brightness is between the second set brightness and the third set brightness, the intersection point of the dotted line and the solid line is the midpoint. Before the midpoint, the compensation coefficient of the driving controller 30 for the image data is greater than the compensation coefficient of the display driving integrated circuit 20 for the image data, and the driving controller 30 mainly compensates the data image. After the midpoint, the compensation coefficient of the driving controller 30 for the image data is less than the compensation coefficient of the display driving integrated circuit 20 for the image data, and the display driving integrated circuit 20 mainly compensates the image data.

[0200] In some embodiments, the driving controller 30 is further configured to receive the fifth initial image data and a fifth compensation instruction matching the eighth light-emitting brightness. For example, based on the fifth compensation instruction, after compensating the fifth initial image data through the first compensation module, the driving controller 30 outputs the seventh compensated image data and a fourth auxiliary compensation instruction to the display driving integrated circuit 20. At this time, the display driving 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, the display driving integrated circuit 20 outputs the eighth compensated image data to the display panel 10.

[0201] The eighth light-emitting brightness is greater than the second set brightness and less than the third set brightness. The eighth light-emitting brightness is a medium-low brightness and greater than the seventh light-emitting brightness.

[0202] Exemplarily, the compensation coefficient of the driving controller 30 for the fifth initial image data at the eighth light-emitting brightness is less than the compensation coefficient of the driving controller 30 for the fourth initial image data at the seventh light-emitting brightness. The compensation coefficient of the display driving integrated circuit 20 for the seventh compensated image data at the eighth light-emitting brightness is greater than the compensation coefficient of the display driving integrated circuit 20 for the fifth compensated image data at the seventh light-emitting brightness.

[0203] For example, the compensation coefficient of the driving controller 30 for the fifth initial image data at the eighth light-emitting brightness, the compensation coefficient of the driving controller 30 for the fourth initial image data at the seventh light-emitting brightness, and the compensation coefficient of the driving controller 30 for the third initial image data at the sixth light-emitting brightness satisfy the same linear equation.

[0204] The compensation coefficient of the display driving integrated circuit 20 for the seventh compensated image data at the eighth luminance, the compensation coefficient of the display driving integrated circuit 20 for the fifth compensated image data at the seventh luminance, and the compensation coefficient of the display driving 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 the second set value and less than the third set value, as the luminance increases, the compensation coefficient of the driving controller 30 for the initial image data at the matching luminance linearly decreases, and the compensation coefficient of the display driving integrated circuit 20 for the image data sent by the driving controller 30 is defined to increase.

[0206] In the intermediate luminance scenario, both the driving controller 30 and the display driving integrated circuit 20 compensate the image data to a certain extent. As the luminance gradually increases, the degree of compensation of the display driving integrated circuit 20 for the image data gradually increases until entering the high luminance scenario, where only the display driving integrated circuit 20 compensates the image data completely. The gradual switching between the two compensation schemes is realized, making the display effect transition smoothly and further optimizing the display effect.

[0207] Figure 10 It is a schematic diagram showing the cooperation of different product timing switching and compensation switching provided by the embodiments of the present application.

[0208] In some embodiments, such as Figure 10 in the fourth product, the first set luminance is greater than the third set luminance.

[0209] In this product, when in the low luminance scenario and the luminance is less than the second set luminance, the electronic device 1 executes the first pulse timing A and compensation scheme E. When in the low luminance scenario and the luminance is greater than the second set value and less than the third set luminance, the electronic device 1 executes the first pulse timing A and compensation scheme G. When in the low luminance scenario and the luminance is greater than the third set value and less than the first set luminance, the electronic device 1 executes the first pulse timing A and compensation scheme G. When in the high luminance scenario and the luminance is greater than the first set luminance, the electronic device 1 executes the second pulse timing B and compensation scheme F.

[0210] In some other embodiments, such as Figure 10 in the fifth product, the first set luminance is less than the second set luminance.

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

[0212] That is to say, 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 set value and the third set value. Then, when the electronic device 1 exchanges the first pulse timing A and the second pulse timing B, the compensation scheme executed by the electronic device 1 is either only compensated by the driving controller 30 or only compensated by the display driving integrated circuit 20, and the compensation scheme is a single and stable compensation scheme. That is, the compensation scheme does not switch when the pulse timing switches, reducing other variables of the electronic device 1 when the pulse timing switches, thereby optimizing the problem of display effect changes caused by pulse timing changes.

[0213] The embodiment of the present application also provides a driving method for the electronic device 1. The electronic device 1 includes, for example, any of the above-mentioned electronic devices. The driving method of the electronic device 1 includes: the display driving integrated circuit 20 receives a first brightness instruction representing the first emission brightness and outputs the first pulse timing A to the display panel 10. The display driving integrated circuit 20 receives a second brightness instruction representing the second emission brightness and outputs the second pulse timing B to the display panel 10.

[0214] In some embodiments, the driving method of the electronic device 1 further includes: the display driving integrated circuit 20 receives a third brightness instruction representing the third emission brightness and outputs the 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 receives the first initial image data and a first compensation instruction matching the fourth emission brightness, and controls 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 receives the second initial image data and a second compensation instruction matching the fifth emission brightness, and controls 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 receives third initial image data and a third compensation instruction matching the sixth light-emitting brightness, and controls the driving controller 30 and the display driving integrated circuit 20 to execute compensation scheme G.

[0218] In some embodiments, the driving method of the electronic device 1 further includes: the driving controller 30 receives fourth initial image data and a fourth compensation instruction matching the seventh light-emitting brightness, and controls the driving controller 30 and the display driving integrated circuit 20 to execute compensation scheme G. And for different brightness levels, the compensation coefficients of the driving controller 30 and the display driving integrated circuit 20 are different. For example, as the brightness gradually increases, the compensation coefficient of the driving controller 30 gradually decreases, and 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 by the embodiments of the present application are the same as those of the electronic device 1, and will not be elaborated here.

[0220] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A display driving integrated circuit, characterized in that, The display driving integrated circuit is used to drive a display panel; The display driving integrated circuit is further used for: Receiving a first brightness instruction representing a first emission brightness, and outputting a first reset start signal and a first emission control start signal to the display panel; Receiving a second brightness instruction representing a second emission brightness, and outputting a second reset start signal and a second emission control start signal to the display panel; Wherein, the first emission brightness is less than a first set brightness, and the second emission brightness 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 emission control start signal, and f4 is the frequency of the second emission control start signal; f3≥f4, f1≦f3, f2≦f4; and, f1>f2, or, f1≥720HZ and f1 = f2.

2. The display driving integrated circuit according to claim 1, wherein In the case of f1>f2, f1≥720HZ.

3. The display driving integrated circuit according to claim 2, wherein f2≥360HZ.

4. The display driving integrated circuit according to any one of claims 1-3, characterized in that, The value range of the first set brightness is 10nit to 200nit.

5. The display driving integrated circuit according to any one of claims 1-4, characterized in that, The display driving integrated circuit is further used for: Receiving a third brightness instruction representing a third emission brightness, and outputting a third reset start signal and a third emission control start signal to the display panel; Wherein, the third emission brightness is less than the first set brightness and less than the first emission brightness; the duty ratio of the first emission control start signal is greater than the duty ratio of the third emission control start signal; f5 = f1, f5≦f6, f5 is the frequency of the third reset start signal, and f6 is the frequency of the third emission control start signal.

6. The display driving integrated circuit according to any one of claims 1-5, characterized in that, The display panel includes an array substrate and a plurality of light-emitting devices arranged on the array substrate; The light-emitting device includes a first electrode layer, a first light-emitting layer, a conductive connection layer, a second light-emitting layer, and a second electrode layer sequentially arranged on the array substrate.

7. A display module, characterized in that, The display module includes a display driving integrated circuit and a display panel, and the display driving integrated circuit is coupled to the display panel; the display driving integrated circuit includes the display driving integrated circuit according to any one of claims 1-6.

8. An electronic device, characterized in that, The electronic device includes a driving controller, a display driving integrated circuit, and a display panel, and the display driving integrated circuit is respectively coupled to the driving controller and the display panel; The display driving integrated circuit includes the display driving integrated circuit according to any one of claims 1-6, and the driving controller is used to send the first brightness instruction and the second brightness instruction to the display driving integrated circuit; And / or, The driving controller is used to receive initial image data and output compensated image data to the display driving integrated circuit; The display driving integrated circuit is used to perform digital-to-analog conversion on the compensated image data and output the converted compensated image data to the display panel.

9. A driving method for an electronic device, characterized in that, 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 receives a first brightness instruction representing a first emission brightness, and outputs a first reset start signal and a first emission control start signal to the display panel; The display driving integrated circuit receives a second brightness instruction characterizing a second light emitting brightness, and outputs 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 the frequency of the first reset start signal, f2 is the frequency of the second reset start signal, f3 is the frequency of the first light emitting control start signal, and f4 is the frequency of the second light emitting control start signal; f3≥f4, f1≦f3, f2≦f4; and, f1>f2, or, f1≥720HZ and f1 = 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.

10. An electronic device, characterized in that, The electronic device includes a driving controller, a display driving integrated circuit, and a display panel, and the display driving integrated circuit is respectively coupled to the driving controller and the display panel; The display driving integrated circuit includes the display driving integrated circuit according to any one of claims 1-6, and the driving controller is configured to send the first brightness instruction and the second brightness instruction to the display driving integrated circuit; and / or, The driving controller is configured to: Receive first initial image data and a first compensation instruction matching a fourth light emitting brightness, and output first compensated image data to the display driving integrated circuit; Receive second initial image data and a second compensation instruction matching a fifth light emitting brightness, and output first uncompensated image data to the display driving integrated circuit; The fourth light emitting brightness is less than a second set brightness, the fifth light emitting brightness is greater than a third set brightness, and the third set brightness is greater than or equal to the second set brightness.

11. The electronic device according to claim 10, wherein The display driving integrated circuit is configured to output second uncompensated image data to the display panel according to the first uncompensated image data.

12. The electronic device according to claim 10, wherein After receiving the second initial image data and the second compensation instruction, the driving controller is further configured to output a first auxiliary compensation instruction to the display driving integrated circuit; The display driving integrated circuit is configured to output second compensated image data to the display panel according to the first auxiliary compensation instruction and the first uncompensated image data.

13. The electronic device according to any one of claims 10-12, characterized in that, The third set brightness is greater than the second set brightness; The driving controller is further configured to: receive third initial image data and a third compensation instruction matching a sixth light emitting brightness, 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 compensated image data and the second auxiliary compensation instruction and output fourth compensated image data to the display panel; Wherein, the sixth light emitting brightness is greater than the second set brightness and less than the third set brightness.

14. The electronic device according to claim 13, wherein The driving controller is further configured to: receive the fourth initial image data and a fourth compensation instruction matching the seventh emission brightness, and output fifth compensation image data and a third auxiliary compensation instruction to the display driving integrated circuit; 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; Wherein, the seventh emission brightness is greater than the sixth emission brightness 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; the compensation coefficient of the display driving integrated circuit for the fifth compensation image data is greater than the compensation coefficient of the display driving integrated circuit for the third compensation image data.

15. The electronic device according to claim 13 or 14, wherein The first set brightness is greater than the third set brightness; Or The first set brightness is less than the second set brightness.

16. The electronic device according to any one of claims 10-15, characterized in that, 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 sequentially disposed on the array substrate, and the first light-emitting layer and the second light-emitting layer are configured to emit light of the same color.

17. A driving method for an electronic device, characterized in that 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 receives a first brightness instruction representing a first emission 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 emission brightness, and outputs a second reset start signal and a second light-emitting control start signal to the display panel; Wherein, the first emission brightness is less than a first set brightness, and the second emission brightness 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 light-emitting control start signal, and f4 is the frequency of the second light-emitting control start signal; f3≥f4, f1≦f3, f2≦f4; and, f1>f2, or, f1≥720HZ and f1 = f2; And / or The driving controller receives first initial image data and a first compensation instruction matching a fourth emission brightness, and outputs first compensation image data to the display driving integrated circuit; The driving controller receives second initial image data and a second compensation instruction matching a fifth emission brightness, and outputs first uncompensated image data to the display driving integrated circuit; The fourth emission brightness is less than a second set brightness, the fifth emission brightness is greater than a third set brightness, and the third set brightness is greater than or equal to the second set brightness.

18. The driving method according to claim 17, wherein Based on the display driving integrated circuit receiving the first brightness instruction and the second brightness instruction, the driving method further includes: The display driving integrated circuit receives a third brightness instruction characterizing a third emission brightness, and outputs a third reset start signal and a third emission control start signal to the display panel; wherein, the third emission brightness is less than the first set brightness and less than the first emission brightness; the duty cycle of the first emission control start signal is greater than the duty cycle of the third emission control start signal; f5 = f1, f5 ≤ f6, where f5 is the frequency of the third reset start signal and f6 is the frequency of the third emission control start signal.

19. The driving method according to claim 17, wherein After the driving controller outputs the first uncompensated image data to the display driving integrated circuit, the driving method further includes: the display driving integrated circuit outputs second uncompensated image data to the display panel according to the first uncompensated image data.

20. The driving method according to claim 17, wherein After the driving controller receives the second initial image data and the second compensation instruction, the driving method further includes: the driving controller outputs a first auxiliary compensation instruction to the display driving integrated circuit; the display driving integrated circuit outputs second compensated image data to the display panel according to the first auxiliary compensation instruction and the first uncompensated image data.

21. The driving method according to claim 17, 19 or 20, characterized in that, The third set brightness is greater than the second set brightness; The driving method further includes: the driving controller receives third initial image data and a third compensation instruction matching a sixth emission brightness, and outputs third compensated image data and a second auxiliary compensation instruction to the display driving integrated circuit; the display driving integrated circuit receives the third compensated image data and the second auxiliary compensation instruction, and outputs fourth compensated image data to the display panel; wherein, the sixth emission brightness is greater than the second set brightness and less than the third set brightness.

22. The driving method according to claim 21, wherein The driving method further includes: the driving controller receives fourth initial image data and a fourth compensation instruction matching a seventh emission brightness, and outputs fifth compensated image data and a third auxiliary compensation instruction to the display driving integrated circuit; the display driving integrated circuit receives the fifth compensated image data and the third auxiliary compensation instruction, and outputs sixth compensated image data to the display panel; wherein, the seventh emission brightness is greater than the sixth emission brightness 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; 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.

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