Display driving control method, control circuit, display device and display driving control chip

Abstract

The application relates to a display driving control method, a control circuit, a display device and a display driving control chip. The display driving control method comprises the following steps: obtaining a target display brightness and a target refresh rate; determining a dimming mode according to the target display brightness; and outputting a driving signal corresponding to the dimming mode and the target refresh rate. The method can reduce display driving power consumption.

Description

Technical Field

[0001] This application relates to the field of display driver technology, and in particular to a display driver control method, control circuit, display device, and display driver control chip. Background Technology

[0002] With the rapid development of technology, the pursuit of high performance in display devices has driven them to evolve towards high refresh rates, high-quality displays, and large-size screens. At the same time, it is required that standby time not be affected, that is, power consumption cannot be increased significantly. Therefore, reducing power consumption has become the key.

[0003] However, for display devices, the driving voltage requirements vary depending on the refresh rate and the dimming method at the same refresh rate. Current display driver designs only allow for a single driving voltage value, meaning the driving voltage can only be set to the level required to meet the maximum driving voltage requirement. This results in increased power consumption of the display driver when the driving voltage is not at its maximum. Summary of the Invention

[0004] Therefore, it is necessary to provide a display driver control method, control circuit, display device, and display driver control chip to address the above-mentioned technical problems.

[0005] In a first aspect, this application provides a display driver control method, the method comprising:

[0006] Obtain the target display brightness and target refresh rate;

[0007] Determine the dimming method based on the target display brightness;

[0008] Output drive signals corresponding to the dimming mode and target refresh rate.

[0009] In one embodiment, the output of a drive signal corresponding to the dimming mode and the target refresh rate includes:

[0010] Determine the target black state voltage based on the dimming method and the target refresh rate;

[0011] Determine the reference driving voltage corresponding to the target black-state voltage;

[0012] The drive signal is output according to the target voltage supply method corresponding to the reference drive voltage;

[0013] Among them, the target voltage supply method is the one with the smallest output voltage that is greater than the reference driving voltage among a variety of preset voltage supply methods.

[0014] In one embodiment, the drive signal is output according to the target voltage supply method corresponding to the reference drive voltage, including:

[0015] The drive voltage is output according to the target voltage supply method corresponding to the reference drive voltage;

[0016] The drive signal is output based on the drive voltage.

[0017] In one embodiment, the multiple preset voltage supply methods are composed of one or more combinations of several external power signals;

[0018] Among them, several external power supply signals include: analog voltage signals, driver analog power supply voltage signals, I / O interface voltage signals, and digital voltage signals.

[0019] Secondly, this application also provides a display driver control circuit. The power supply terminal of the display driver control circuit is used to connect to an external power supply signal, and the input terminal of the display driver control circuit is used to connect to an application processor to obtain the target display brightness and target refresh rate from the application processor, and determine the dimming mode according to the target display brightness. The output terminal of the display driver control circuit is used to connect to a display panel. The display driver control circuit is used to execute the steps of the method as described in the above embodiments to output a drive signal corresponding to the dimming mode and the target refresh rate.

[0020] In one embodiment, the display drive control circuit includes:

[0021] The dynamic boost control module has its input terminal connected to the application processor. The dynamic boost control module is used to determine the target black state voltage based on the dimming method and the target refresh rate, and to determine the reference drive voltage corresponding to the target black state voltage.

[0022] The voltage output module has a power supply terminal for connecting to an external power signal, an input terminal for connecting to the output terminal of the dynamic boost control module, and an output terminal for connecting to the display panel. Under the drive of the dynamic boost control module, the voltage output module outputs a drive signal according to the target voltage supply method corresponding to the reference drive voltage.

[0023] Among them, the target voltage supply method is the one with the smallest output voltage that is greater than the reference driving voltage among a variety of preset voltage supply methods.

[0024] In one embodiment, the voltage output module includes:

[0025] The voltage production module has a power supply terminal for receiving an external power signal and an input terminal connected to the output terminal of the dynamic boost control module. Under the drive of the dynamic boost control module, the voltage production module outputs a drive voltage according to the target voltage supply method corresponding to the reference drive voltage.

[0026] The driver circuit has its input terminal connected to the output terminal of the voltage production module and its output terminal connected to the display panel. The driver circuit is used to output a drive signal according to the drive voltage.

[0027] In one embodiment, the voltage generation module includes:

[0028] The charge pump circuit has its power supply terminal connected to an external power signal, and its input terminal connected to the output terminal of the dynamic boost control module.

[0029] The linear voltage regulator circuit has its input terminal connected to the output terminal of the charge pump circuit, and its output terminal connected to the input terminal of the drive circuit.

[0030] Thirdly, this application also provides a display device, which includes:

[0031] Display panel;

[0032] The application processor is used to output the target display brightness and the target refresh rate;

[0033] As in the above embodiment, the display driver control circuit has an input terminal connected to the application processor, a power supply terminal for connecting to an external power signal, and an output terminal connected to the display panel.

[0034] Fourthly, this application also provides a display driver control chip, including a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement the steps of the method described above.

[0035] The above-described display driver control method, control circuit, display device, and display driver control chip have at least the following beneficial effects:

[0036] By accurately acquiring the target display brightness and refresh rate, and determining the appropriate dimming mode based on the target display brightness, the system can output corresponding drive signals for different usage scenarios and user needs. Unlike existing technologies that use a single drive voltage set solely to meet the highest demands, resulting in excessive power consumption, this method can rationally adjust the drive voltage based on the actual combination of brightness, refresh rate, and dimming mode. This allows for the use of relatively low and suitable drive voltages in various scenarios, such as low brightness and low refresh rate or high brightness and high refresh rate, significantly reducing display driver power consumption, effectively improving the energy efficiency of display devices, saving electricity for users, and extending the lifespan of display devices. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is a schematic diagram of the brightness versus DBV value curve of a display device in one embodiment;

[0039] Figure 2 This is a flowchart illustrating the driving control method in one embodiment;

[0040] Figure 3 This is a flowchart illustrating the steps of outputting a drive signal corresponding to the dimming mode and the target refresh rate in one embodiment.

[0041] Figure 4 This is a flowchart illustrating the steps of outputting a drive signal according to the target voltage supply method corresponding to the reference drive voltage in one embodiment;

[0042] Figure 5 This is a schematic diagram showing the connection between the drive control circuit and external devices in one embodiment;

[0043] Figure 6 This is a schematic diagram of the drive control circuit in one embodiment;

[0044] Figure 7 This is a schematic diagram of the drive control circuit in another embodiment;

[0045] Figure 8 This is a schematic diagram of the drive control circuit in yet another embodiment;

[0046] Figure 9 This is a structural block diagram of the drive control device shown in one embodiment;

[0047] Figure 10 This is an internal structural diagram of a computer device in one embodiment. Detailed Implementation

[0048] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0049] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0050] It should be noted that when one element is considered to be "connected" to another element, it can be directly connected to the other element or connected to the other element through an intermediary element. Furthermore, in the following embodiments, "connection" should be understood as "electrical connection," "communication connection," etc., if there is transmission of electrical signals or data between the connected objects.

[0051] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” or “having,” etc., specify the presence of the stated feature, whole, step, operation, component, part, or combination thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof.

[0052] As described in the background section, existing display devices suffer from high power consumption. The inventors have discovered that this problem arises because existing display devices have a single driving voltage setting for different refresh rates and dimming modes. Furthermore, this driving voltage setting must meet the requirement of the highest driving voltage. Consequently, even when the display device operates at a lower refresh rate or lower brightness, it can only operate at the highest set driving voltage, resulting in high power consumption.

[0053] Taking AMOLED (Active Matrix Organic Light Emission Diode) display devices as an example, they typically employ different dimming methods at different brightness levels during operation. For instance, ... Figure 1As shown, when the brightness is below 70 nits, PWM (Pulse Width Modulation) dimming is used; when the brightness is above 70 nits, DC (Direct Current) dimming is used. AMOLED displays require different driving voltages at different refresh rates, and even at the same refresh rate, different dimming methods require different driving voltages. For example, when using DC dimming at a refresh rate of 120Hz, the driving voltage is relatively low; while when using PWM dimming at a refresh rate of 120Hz, the driving voltage is relatively high. However, in current display driver designs, the driving voltage can only be set to a single value. To meet the requirement of the highest driving voltage, the driving voltage must be set to the level required for the highest driving voltage, resulting in increased display driver power consumption when the driving voltage is not at its highest.

[0054] For the reasons mentioned above, such as Figure 2 As shown, this application provides a display driver control method, which includes:

[0055] S202, Obtain the target display brightness and target refresh rate;

[0056] S204, determine the dimming method based on the target display brightness;

[0057] S206 outputs a drive signal corresponding to the dimming mode and target refresh rate.

[0058] Target display brightness refers to the level of screen brightness that the user expects the display device to achieve. This target display brightness can be a specific numerical value used to measure the brightness of the displayed content. Different usage scenarios and user preferences will correspond to different target display brightness levels. For example, in bright outdoor light, a higher brightness may be needed to see the screen content clearly, while in dim indoor light, a lower brightness may be needed to protect the eyes and save power. Target refresh rate refers to the number of times the display device updates the screen image per second, measured in Hertz (Hz). A higher refresh rate makes the image display smoother and more fluid, especially when displaying dynamic scenes, such as watching videos or playing games. For example, a common 60Hz refresh rate means the screen updates the image 60 times per second, while a 120Hz refresh rate means it updates 120 times per second. The target refresh rate reflects the user's requirement for the smoothness of the display. Dimming method is the method used to adjust the screen brightness of the display device. In AMOLED display devices, there are usually two methods: PWM dimming and DC dimming. PWM dimming, or Pulse Width Modulation dimming, adjusts brightness by controlling the on and off times of the light source. It can achieve high precision at low brightness levels, but may have flicker issues. DC dimming, on the other hand, directly adjusts brightness by changing the magnitude of the drive current. It provides better display effects at high brightness levels and does not have flicker, but may have problems such as inaccurate colors at low brightness levels.

[0059] For example, consider an AMOLED display device where a user is viewing static images (such as browsing a photo album) in a dimly lit indoor environment. Based on the environment and personal preference, the user desires a low screen brightness, assuming a target display brightness of 50 nits (below 70 nits). Since viewing static images doesn't require high image smoothness, the target refresh rate is assumed to be set to 60Hz. In existing technologies, regardless of the actual needs, the driving voltage is set to meet the highest refresh rate and brightness levels. Even in such low-brightness and low-refresh-rate scenarios, the device operates with a high driving voltage, resulting in unnecessary power consumption. Since the target display brightness is 50 nits (below 70 nits), the dimming method can be determined to be PWM dimming. In existing technologies, the dimming method is not flexibly selected based on brightness, making optimization impossible based on the driving voltage characteristics under different dimming methods; a uniformly set high driving voltage is used. Once the PWM dimming method and the target refresh rate of 60Hz are determined, the system outputs a drive signal corresponding to this combination. The drive voltage corresponding to this signal is set based on the actual requirements of PWM dimming and the 60Hz refresh rate, and will be lower than the drive voltage required to meet the highest refresh rate and highest brightness requirements. In existing technologies, because the drive voltage setting is singular, the device operates at a high drive voltage, resulting in high power consumption. In this application, however, a suitable drive signal is output based on the actual target display brightness, target refresh rate, and determined dimming method, using a relatively lower drive voltage, thereby reducing the power consumption of the display driver and solving the problem of excessive power consumption in existing technologies. Similarly, for scenarios requiring high brightness and high refresh rates, such as a target display brightness higher than 70 nits and a target refresh rate of 120Hz, this application also outputs a suitable drive signal based on the actual target display brightness, target refresh rate, and dimming method, using a relatively lower drive voltage, thereby reducing the power consumption of the display driver.

[0060] The aforementioned display driver control method accurately acquires the target display brightness and refresh rate, and determines an appropriate dimming mode based on the target display brightness. This allows it to output corresponding drive signals for different usage scenarios and user needs. Unlike existing technologies that use a single drive voltage set solely to meet the highest demands, resulting in excessive power consumption, this method can rationally adjust the drive voltage based on the actual combination of brightness, refresh rate, and dimming mode. It can use a relatively low and suitable drive voltage in various scenarios, such as low brightness and low refresh rate or high brightness and high refresh rate, significantly reducing display driver power consumption, effectively improving the energy efficiency of display devices, saving electricity for users, and extending the lifespan of display devices.

[0061] In one exemplary embodiment, such as Figure 3As shown, the output drive signals corresponding to the dimming mode and target refresh rate include:

[0062] S302, determine the target black state voltage based on the dimming method and target refresh rate;

[0063] S304, determine the reference driving voltage corresponding to the target black-state voltage;

[0064] S306 outputs a drive signal according to the target voltage supply method corresponding to the reference drive voltage;

[0065] Among them, the target voltage supply method is the one with the smallest output voltage that is greater than the reference driving voltage among a variety of preset voltage supply methods.

[0066] The target black state voltage is a voltage value determined based on the display device's dimming mode and target refresh rate. Black state voltage refers to the driving voltage required by the display panel to display a black image. Different dimming modes and refresh rates affect the voltage requirements for displaying black. The target black state voltage is the appropriate voltage for displaying a black image based on the specific dimming mode and target refresh rate. The reference driving voltage is a driving voltage value corresponding to the target black state voltage. It is a reference voltage value used to drive the display device, derived according to a certain correspondence or algorithm after determining the target black state voltage. This voltage value is a key parameter to ensure the display device can display images normally under the current dimming mode and target refresh rate. For example, assuming the black state voltage is 6V, the reference driving voltage must be at least greater than or equal to the black state voltage + 1V, i.e., at least 7V. The target voltage supply method is selected from several preset voltage supply methods. The selection principle is that the output voltage must be greater than the reference driving voltage, and its voltage value is the smallest among all preset voltage supply methods that meet this condition. This approach ensures that the voltage supplied to the display device is sufficient for driving requirements without being excessive, thereby reducing power consumption. Preset voltage supply methods are a series of pre-defined ways to provide driving voltage to the display device. These methods can include different voltage values, voltage regulation strategies, or circuit configurations to adapt to different operating conditions and needs. In practical applications, a suitable target voltage supply method is selected from these preset methods to output the driving signal, based on factors such as the specific reference driving voltage.

[0067] For example, taking AMOLED display devices, the black state voltage varies with different refresh rates, and even at the same refresh rate, different dimming methods result in different black state voltages. However, current display driver designs use a single driving voltage setting for different refresh rates and dimming methods, and this voltage must be set to the voltage required at the highest black state voltage. This leads to higher display driver power consumption when the black state voltage is not at its highest. For instance, if the display device uses DC dimming and has a refresh rate of 120Hz, the required black state voltage is lower, and the corresponding driving voltage does not need to be too high. If the current display driver design uses a higher driving voltage, it will undoubtedly increase the display driver power consumption.

[0068] For the reasons mentioned above, in this embodiment, by determining the dimming method (e.g., DC dimming) and the target refresh rate (e.g., 120Hz), and based on the characteristics of the black state voltage of the AMOLED display device under different refresh rates and dimming methods, the target black state voltage under these conditions can be determined. This target black state voltage is a suitable voltage for displaying a black image under the current DC dimming and 120Hz refresh rate, and is lower than the highest black state voltage. After obtaining the target black state voltage, a reference driving voltage is derived according to a certain correspondence or algorithm. For example, assuming the target black state voltage is 6V, according to the aforementioned rule (the reference driving voltage is at least greater than or equal to the black state voltage + 1V), then the reference driving voltage is at least 7V. Since this reference driving voltage is derived based on the current actual target black state voltage, it is lower than the high driving voltage set in the prior art to meet the highest black state voltage. Then, from a variety of preset voltage supply methods, the target voltage supply method is selected according to the principle that the output voltage is greater than the reference driving voltage and the voltage value is the smallest. Since the reference drive voltage is a relatively low value derived from actual needs, the output voltage of the selected target voltage supply method will not be too high, which is just enough to meet the driving requirements of display devices under current DC dimming and 120Hz refresh rate.

[0069] In this embodiment, a suitable target black state voltage and reference driving voltage are determined based on the actual dimming method and target refresh rate, and a suitable target voltage supply method is selected. The driving voltage corresponding to the output driving signal is a relatively low value that meets the actual requirements, avoiding the use of excessively high driving voltage in non-maximum black state voltage conditions in the prior art, thereby effectively reducing display driving power consumption and solving the problem of excessive power consumption.

[0070] In one exemplary embodiment, such as Figure 4 As shown, the drive signal is output according to the target voltage supply method corresponding to the reference drive voltage, including:

[0071] S402 outputs the drive voltage according to the target voltage supply method corresponding to the reference drive voltage;

[0072] S404 outputs a drive signal based on the drive voltage.

[0073] Among them, the drive signal is used to control the operation of the display device. After receiving the drive voltage, the display device will generate a corresponding drive signal based on this voltage. The drive signal contains information such as pixel brightness and color, thereby controlling the display device to present an image that meets the user's needs.

[0074] For example, assuming the determined reference driving voltage is 7V, the system filters from various preset voltage supply methods to find the one with the lowest output voltage greater than 7V. Assuming preset voltage supply methods include 7.5V, 8V, and 9V, the target voltage supply method is the one with an output voltage of 7.5V. Following the selected target voltage supply method, a 7.5V driving voltage is output, and a corresponding driving signal is generated based on this voltage. This driving signal controls the pixels of the display device, enabling it to display content at the appropriate brightness under the corresponding dimming mode and refresh rate. Based on this, the display device can operate at a lower voltage to meet actual needs, avoiding the power waste caused by using excessively high voltages and effectively solving the problem of excessive display driver power consumption.

[0075] In this embodiment, a suitable target voltage supply method is selected based on a reference driving voltage, outputting a driving voltage that meets the requirements and is as low as possible. A driving signal is then generated based on this driving voltage to control the display device's operation. This precisely adapts to the actual needs of the display device under different dimming modes and refresh rates, avoiding the use of excessively high fixed voltages as in traditional methods. It ensures that the display device can correctly present the image that meets the user's expectations, such as controlling pixel brightness and color, while significantly reducing unnecessary power consumption, effectively solving the problem of excessive power consumption in display driving.

[0076] In one exemplary embodiment, the multiple preset voltage supply methods are composed of one or more of a plurality of external power signals; wherein, the plurality of external power signals include: analog voltage signals, driver analog power supply voltage signals, I / O interface voltage signals, and digital voltage signals.

[0077] In the power supply methods of display driver chips, multiple voltage supply methods are typically provided, such as analog voltage signal (AVDD), driver analog power supply voltage signal (VCI), I / O interface voltage signal (VDDI), and digital voltage signal (DVDD) to power the display driver chip. Preset voltage supply methods refer to the different modes or methods of providing voltage to the driver chip through these four power supplies in advance. For example, a single external power signal (such as AVDD) can be selected as a voltage supply method, or multiple external power signals can be combined (such as AVDD+VDDI) as a voltage supply method to meet the driving voltage requirements under different dimming modes and different refresh rates.

[0078] For example, the preset voltage supply method is a way to preset and adjust the voltage values ​​of the four external power supply signals AVDD, VCI, VDDI and DVDD according to the different working conditions and requirements of the display driver chip, so as to provide appropriate power supply to the display driver chip, thereby ensuring that the display device can work normally according to the expected target display brightness, target refresh rate and dimming mode, while optimizing power consumption and performance.

[0079] In the above embodiments, by setting multiple preset voltage supply methods to be composed of one or more combinations of several external power signals such as analog voltage signals, driver analog power supply voltage signals, I / O interface voltage signals, and digital voltage signals, a flexible and diverse power supply mode is provided for the display driver chip. This method can preset and adjust the voltage values ​​of each external power signal according to different operating conditions and requirements of the display driver chip, such as different dimming modes and refresh rates, thereby providing appropriate power supply. This not only ensures that the display device works normally according to the expected target display brightness, target refresh rate, and dimming mode, guaranteeing the display effect, but also effectively optimizes power consumption and performance, avoiding power waste or insufficient performance caused by a fixed power supply mode, and improving the energy utilization efficiency and overall working efficiency of the display device.

[0080] In one exemplary embodiment, such as Figure 5 As shown, this application also provides a display driver control circuit 2. The power supply terminal of the display driver control circuit 2 is used to connect to an external power signal, and the input terminal of the display driver control circuit 2 is used to connect to an application processor 100 to obtain the target display brightness and target refresh rate from the application processor 100, and determine the dimming mode according to the target display brightness. The output terminal of the display driver control circuit 2 is used to connect to a display panel 300. The display driver control circuit 2 is used to execute the steps of the method as described in the above embodiments to output a drive signal corresponding to the dimming mode and the target refresh rate.

[0081] The specific connection relationship of the above-mentioned display driver control circuit 2 can be referred to Figure 5 As shown, the external power signal can also come from the application processor 100. For the specific control method, process and beneficial effects of the display driver, please refer to the description in the above-mentioned display driver control method embodiment, which will not be repeated here.

[0082] In one exemplary embodiment, such as Figure 6 As shown, the display drive control circuit 2 includes a dynamic boost control module 22 and a voltage output module 24. The input terminal of the dynamic boost control module 22 is connected to the application processor 100. The dynamic boost control module 22 determines the target black state voltage based on the dimming mode and target refresh rate, and determines the reference drive voltage corresponding to the target black state voltage. The power supply terminal of the voltage output module 24 is connected to an external power signal. The input terminal of the voltage output module 24 is connected to the output terminal of the dynamic boost control module 22, and the output terminal of the voltage output module 24 is connected to the display panel 300. Under the drive of the dynamic boost control module 22, the voltage output module 24 outputs a drive signal according to the target voltage supply method corresponding to the reference drive voltage. The target voltage supply method is the smallest among multiple preset voltage supply methods where the output voltage is greater than the reference drive voltage.

[0083] The meanings of the target black-state voltage, the target voltage supply method, and the preset voltage supply method can be referred to the description in the above method embodiments, and will not be repeated here.

[0084] For example, after receiving the target display brightness and target refresh rate sent by the application processor 100, the dynamic boost control module 22 determines the dimming mode based on the target display brightness, and then determines the target black state voltage according to the dimming mode and target refresh rate, and determines the reference driving voltage corresponding to the target black state voltage. Driven by the dynamic boost control module 22, the voltage output module 24 outputs the voltage with the smallest value greater than the reference driving voltage from a variety of preset voltage supply methods, based on the reference driving voltage and the external power signal, as the target voltage supply method, and then outputs the driving signal according to the target voltage supply method. For example, a single external power signal (such as AVDD) can be selected as the voltage supply method, or a combination of multiple external power signals (such as AVDD+VDDI) can be used as the voltage supply method to meet the driving voltage requirements under different dimming modes and different refresh rates, thereby achieving low power consumption.

[0085] In this embodiment, the dynamic boost control module 22, connected to the application processor 100, can accurately receive key information such as target display brightness and target refresh rate, and determine the dimming mode, target black state voltage, and corresponding reference drive voltage accordingly, thus achieving accurate control over the operating state of the display device. The voltage output module 24, in conjunction with the dynamic boost control module 22, selects the target voltage supply mode with the smallest output voltage greater than the reference drive voltage from a variety of preset voltage supply modes consisting of single or multiple external power signals. This greatly improves the flexibility and adaptability of the power supply. It not only meets the drive voltage requirements of the display device under different dimming modes and refresh rates, ensuring the display device displays the image as expected by the user, but also effectively avoids using excessively high drive voltages, reducing the power consumption of the display driver.

[0086] In one exemplary embodiment, such as Figure 6 As shown, the voltage output module 24 includes a voltage production module 242 and a drive circuit 244. The power supply terminal of the voltage production module 242 is used to connect to an external power signal. The input terminal of the voltage production module 242 is connected to the output terminal of the dynamic boost control module 22. The voltage production module 242 is used to output a drive voltage according to the target voltage supply method corresponding to the reference drive voltage under the drive of the dynamic boost control module 22. The input terminal of the drive circuit 244 is connected to the output terminal of the voltage production module 242, and the output terminal of the drive circuit 244 is connected to the display panel 300. The drive circuit 244 is used to output a drive signal according to the drive voltage.

[0087] Among them, the driving circuit 244 can refer to an integrated gate driving circuit.

[0088] For example, under the drive of the dynamic boost control module 22, the voltage production module 242 outputs a drive voltage according to the target voltage supply method corresponding to the reference drive voltage. Specifically, assuming the determined reference drive voltage is 7V, it then selects from various preset voltage supply methods to find the method with the smallest output voltage greater than 7V. Assuming the preset voltage supply methods include 7.5V, 8V, 9V, etc., then the target voltage supply method is the method with an output voltage of 7.5V. According to the selected target voltage supply method, a 7.5V drive voltage is output to the drive circuit 244, and the drive circuit 244 generates a corresponding drive signal based on this voltage. This drive signal controls the pixels of the display device, enabling it to display content at the corresponding brightness under the corresponding dimming mode and refresh rate conditions. Based on this, the display device can operate at a lower voltage to meet actual needs, avoiding the power waste caused by using excessively high voltages, and effectively solving the problem of excessive power consumption in display driving.

[0089] In one exemplary embodiment, such as Figure 6As shown, the voltage generation module 242 includes a charge pump circuit 2422 and a linear regulator circuit 2424. The power supply terminal of the charge pump circuit is used to connect to an external power signal, and the input terminal of the charge pump circuit 2422 is connected to the output terminal of the dynamic boost control module 22; the input terminal of the linear regulator circuit 2424 is connected to the output terminal of the charge pump circuit 2422, and the output terminal of the linear regulator circuit 2424 is connected to the input terminal of the drive circuit 244.

[0090] For example, under the drive of the dynamic boost control module 22, the charge pump circuit 2422 outputs an initial drive voltage to the linear regulator circuit 2424 according to the target voltage supply method corresponding to the reference drive voltage. After adjustment by the linear regulator circuit 2424, the drive voltage is output to the drive circuit 244, and then the drive circuit 244 outputs a drive signal to the display panel 300.

[0091] In this embodiment, by combining the charge pump circuit 2422 and the linear regulator circuit 2424, a stable and suitable driving voltage and driving signal can be provided to the display panel 300. Driven by the dynamic boost control module 22, the charge pump circuit 2422 outputs an initial driving voltage according to the target voltage supply method corresponding to the reference driving voltage. This process can flexibly adjust the voltage according to different operating states of the display device to meet the needs of different dimming methods and refresh rates. The linear regulator circuit 2424 adjusts the initial driving voltage output by the charge pump circuit 2422, effectively reducing voltage fluctuations and noise, and outputting a stable and smooth driving voltage. A stable driving voltage ensures that the driving signal output by the driving circuit 244 is accurate and reliable, thereby guaranteeing the display effect of the display panel 300 and reducing problems such as screen flicker and color deviation.

[0092] To describe the technical solution of this application in more detail, an AMOLED display device is used as an example below, combined with... Figures 6 to 8 Describe:

[0093] like Figure 6 As shown, for the display driver control circuit 2 of the AMOLED display device, the external power signals input to the display driver control circuit 2 may include four external power signals: AVDD, VCI, VDDI, and DVDD. Powering the display driver control circuit 2 through these four external power signals can form a configuration as shown below. Figure 7 The various preset voltage supply methods shown are AVDD (AVEE), AVDD+VDDI (AVEE-VDDI), AVDD+VCI (AVEE-VCI), 2*AVDD (2*AVEE), etc., where AVEE=-AVDD.

[0094] Inside the display driver control circuit 2, such as Figure 6 and Figure 7 As shown, the external power signal is converted by the charge pump circuit 2422 and outputs a preliminary driving voltage (VGH and VGL) to the linear regulator circuit 2424. The preliminary driving voltage, after being processed by the linear regulator circuit 2424, outputs a driving voltage (PVGH and PVGL) to the driving circuit 244. Then, the driving circuit 244 generates and outputs a driving signal (GIP signal) to the display panel 300. Due to the characteristics of AMOLED display devices, the black state voltage (VGMP) varies with different refresh rates. For example, the black state voltage corresponding to a 60Hz refresh rate is higher than that corresponding to a 120Hz refresh rate. At the same refresh rate, DC dimming requires a lower black state voltage, for example, VGMP = 6.3V; while PWM dimming requires a higher black state voltage, for example, VGMP = 7.2V. For the pixel circuit of an AMOLED display device, the driving voltage PVGH must be at least greater than or equal to the black state voltage VGMP + 1V to ensure normal display. However, due to the single setting of the driving voltage in the existing display driver design, and in order to meet the requirement of the highest black state voltage, the driving voltage PVGH needs to be set to the highest black state voltage +1V. As a result, in some cases where the requirement of the highest black state voltage is not required, the power consumption of the display driver control circuit 2 is too high due to the driving voltage being set too high and unchanged.

[0095] For the reasons mentioned above, this application adds a dynamic boost control module 22 inside the display driver control circuit 2 to receive the target display brightness and target refresh rate sent by the application processor 100, determine the dimming mode based on the target display brightness, then determine the target black state voltage according to the dimming mode and target refresh rate, further determine the reference driving voltage corresponding to the target black state voltage, and then determine the target voltage supply mode based on the reference driving voltage, so that the voltage output module 24 selects one from a variety of preset voltage supply modes as the target voltage supply mode to output a driving signal to the display panel 300. Figure 8 The following example illustrates this, where the fixed refresh rate is 120Hz:

[0096] (1) If the dimming method is determined to be DC dimming based on the target display brightness, since the black state voltage VGMP required for DC dimming is 6.3V, the driving voltage PVGH is at least greater than or equal to VGMP+1V=7.3V. Since AVDD=7.8V, under the drive of the dynamic boost control module 22, the charge pump circuit 2422 can select the AVDD voltage supply method to output the initial driving voltage VGH to the linear regulator circuit 2424, and then the driving voltage PVGH is output to the driving circuit 244 through the linear regulator circuit 2424, and then the driving signal (GIP signal) is output to the display panel 300 through the driving circuit 244 to meet the driving requirements under a refresh rate of 120Hz and DC dimming.

[0097] (2) If the dimming method is determined to be PWM dimming based on the target display brightness, since the black state voltage VGMP required for PWM dimming is 7.2V, the driving voltage PVGH is at least greater than or equal to VGMP+1V=8.2V. Since AVDD+VDDI=9.6V, under the drive of the dynamic boost control module 22, the charge pump circuit 2422 can select the voltage supply mode of AVDD+VDDI to output the initial driving voltage VGH to the linear regulator circuit 2424, and then output the driving voltage PVGH through the linear regulator circuit 2424, and then output the driving signal (GIP signal) through the driving circuit 244 to the display panel 300 to meet the driving requirements under 120Hz refresh rate and PWM dimming.

[0098] Similarly, for a refresh rate of 60Hz, different voltage supply methods can be selected for DC dimming and PWM dimming to output drive signals based on the determined black state voltage, thereby reducing the power consumption of a single display driver control channel and improving the standby time for end users.

[0099] In one exemplary embodiment, this application also provides a display device, which includes a display panel, an application processor, and the display driver control circuit described in the above embodiment. The application processor is used to output a target display brightness and a target refresh rate; the input terminal of the display driver control circuit is connected to the application processor, the power supply terminal of the display driver control circuit is used to connect to an external power signal, and the output terminal of the display driver control circuit is connected to the display panel.

[0100] It should be understood that although the steps in the flowcharts of the embodiments described above are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the embodiments described above may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.

[0101] Based on the same inventive concept, this application also provides a display driving control device for implementing the display driving control method described above. The solution provided by this device is similar to the solution described in the above method; therefore, the specific limitations in one or more display driving control device embodiments provided below can be found in the limitations of the display driving control method described above, and will not be repeated here.

[0102] In one exemplary embodiment, such as Figure 9 As shown, a display driving control device is provided, comprising:

[0103] The data acquisition module 902 is used to acquire the target display brightness and the target refresh rate.

[0104] The dimming mode determination module 904 is used to determine the dimming mode based on the target display brightness.

[0105] The drive signal output module 906 is used to output drive signals corresponding to the dimming mode and the target refresh rate.

[0106] In an exemplary embodiment, the drive signal output module 906 described above includes:

[0107] The black state voltage determination unit is used to determine the target black state voltage based on the dimming method and the target refresh rate.

[0108] The reference driving voltage determination unit is used to determine the reference driving voltage corresponding to the target black state voltage.

[0109] The drive signal output unit is used to output drive signals according to the target voltage supply method corresponding to the reference drive voltage.

[0110] Among them, the target voltage supply method is the one with the smallest output voltage that is greater than the reference driving voltage among a variety of preset voltage supply methods.

[0111] In an exemplary embodiment, the drive signal output unit includes:

[0112] The drive voltage output unit outputs the drive voltage according to the target voltage supply method corresponding to the reference drive voltage;

[0113] The drive unit outputs a drive signal based on the drive voltage.

[0114] Each module in the aforementioned display driver control device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in the processor of a computer device in hardware form or independent of it, or stored in the memory of the computer device in software form, so that the processor can call and execute the operations corresponding to each module.

[0115] In one exemplary embodiment, a computer device is provided, which may be a terminal, and its internal structure diagram may be as follows: Figure 10 As shown, the computer device includes a processor, memory, input / output interfaces, a communication interface, a display unit, and an input device. The processor, memory, and input / output interfaces are connected via a system bus, and the communication interface, display unit, and input device are also connected to the system bus via the input / output interfaces. The processor provides computing and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The input / output interfaces are used for exchanging information between the processor and external devices. The communication interface is used for wired or wireless communication with external terminals; wireless communication can be achieved through Wi-Fi, mobile cellular networks, Near Field Communication (NFC), or other technologies. When the computer program is executed by the processor, it implements a display driving control method. The display unit of the computer device forms a visually visible image and can be a display screen, a projection device, or a virtual reality imaging device. The display screen can be an LCD screen or an e-ink screen. The input device of the computer device can be a touch layer covering the display screen, or buttons, trackballs, or touchpads set on the casing of the computer device, or external keyboards, touchpads, or mice, etc.

[0116] Those skilled in the art will understand that Figure 10 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0117] In one exemplary embodiment, a display driver control chip is provided, including a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement the steps in the above-described method embodiments.

[0118] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon, which, when executed by a processor, implements the steps in the above method embodiments.

[0119] In one embodiment, a computer program product is provided, including a computer program that, when executed by a processor, implements the steps in the above method embodiments.

[0120] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, artificial intelligence (AI) processors, etc., and are not limited to these.

[0121] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0122] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A display driving control method, characterized in that, The method includes: Obtain the target display brightness and target refresh rate; The dimming method is determined based on the target display brightness; Output a drive signal corresponding to the dimming mode and the target refresh rate.

2. The display driving control method according to claim 1, characterized in that, The output drive signal corresponding to the dimming mode and the target refresh rate includes: The target black state voltage is determined based on the dimming method and the target refresh rate; Determine the reference driving voltage corresponding to the target black state voltage; The drive signal is output according to the target voltage supply method corresponding to the reference drive voltage; The target voltage supply method is one of a variety of preset voltage supply methods, in which the output voltage is greater than the reference driving voltage and the voltage value is the smallest.

3. The display driving control method according to claim 2, characterized in that, The step of outputting the drive signal according to the target voltage supply method corresponding to the reference drive voltage includes: The driving voltage is output according to the target voltage supply method corresponding to the reference driving voltage; The drive signal is output according to the drive voltage.

4. The display driving control method according to claim 2 or 3, characterized in that, The various preset voltage supply methods are composed of one or more combinations of several external power signals; The external power signals include: analog voltage signals, driver analog power supply voltage signals, I / O interface voltage signals, and digital voltage signals.

5. A display driving control circuit, characterized in that, The power supply terminal of the display driver control circuit is used to connect to an external power signal, and the input terminal of the display driver control circuit is used to connect to an application processor to obtain the target display brightness and target refresh rate from the application processor, and determine the dimming mode according to the target display brightness; the output terminal of the display driver control circuit is used to connect to a display panel; the display driver control circuit is used to execute the steps of the method as described in any one of claims 1 to 4 to output a drive signal corresponding to the dimming mode and the target refresh rate.

6. The display driving control circuit according to claim 5, characterized in that, The display driving control circuit includes: A dynamic boost control module, wherein the input terminal of the dynamic boost control module is connected to the application processor, and the dynamic boost control module is used to determine the target black state voltage according to the dimming mode and the target refresh rate; and determine the reference driving voltage corresponding to the target black state voltage; A voltage output module, wherein the power supply terminal of the voltage output module is used to connect to the external power supply signal, the input terminal of the voltage output module is connected to the output terminal of the dynamic boost control module, and the output terminal of the voltage output module is connected to the display panel; the voltage output module is used to output the drive signal according to the target voltage supply mode corresponding to the reference drive voltage under the drive of the dynamic boost control module. The target voltage supply method is one of a variety of preset voltage supply methods, in which the output voltage is greater than the reference driving voltage and the voltage value is the smallest.

7. The display driving control circuit according to claim 6, characterized in that, The voltage output module includes: A voltage production module, wherein the power supply terminal of the voltage production module is used to connect to the external power signal, the input terminal of the voltage production module is connected to the output terminal of the dynamic boost control module, and the voltage production module is used to output a drive voltage according to the target voltage supply mode corresponding to the reference drive voltage under the drive of the dynamic boost control module; The driving circuit has its input terminal connected to the output terminal of the voltage production module and its output terminal connected to the display panel. The driving circuit is used to output the driving signal according to the driving voltage.

8. The display driving control circuit according to claim 7, characterized in that, The voltage production module includes: A charge pump circuit, wherein the power supply terminal of the charge pump circuit is used to connect to the external power supply signal, and the input terminal of the charge pump circuit is connected to the output terminal of the dynamic boost control module; A linear voltage regulator circuit, wherein the input terminal of the linear voltage regulator circuit is connected to the output terminal of the charge pump circuit, and the output terminal of the linear voltage regulator circuit is connected to the input terminal of the drive circuit.

9. A display device, characterized in that, The display device includes: Display panel; Application processor, the application processor being used to output target display brightness and target refresh rate; The display driver control circuit as described in any one of claims 5-8, wherein the input terminal of the display driver control circuit is connected to the application processor, the power supply terminal of the display driver control circuit is used to connect to the external power signal, and the output terminal of the display driver control circuit is connected to the display panel.

10. A display driver control chip, comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the method according to any one of claims 1 to 4.

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