Display panel control method, display panel control apparatus, and electronic device
Patent Information
- Application Number
- CN202510559204.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-29
- Publication Date
- 2026-10-30
AI Technical Summary
[0003]但目前的OLED显示产品的使用性能有待提升
[0012]在本申请实施例中，通过在显示面板的屏体的正电源的电压值固定为第一预设电压值的情况下，按照预设幅度逐渐增大屏体的负电源的电压值，直到负电源的电压值为第二预设电压值，并在增大负电源的电压值的过程中，获取负电源的各电压值对应的屏体的亮度值，能够基于负电源的各电压值和对应的亮度值确定负电源的各电压值与亮度值之间的对应关系，并基于对应关系，从负电源的各电压值中确定各候选电压值，各候选电压值为负电源的各电压值中对应的亮度值的变化率小于预设变化率的电压值，故基于第一预设电压值和各候选电压值中的最大电压值对显示面板进行上电，能够保证在屏体的亮度较为稳定的情况下，第一预设电压值和最大电压值的压差(即跨压)较小，较小的跨压能够降低屏体的功耗，进而降低显示面板的功耗。
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Abstract
Description
Technical Field
[0001] This application belongs to the field of display technology, and in particular relates to a display panel control method, display panel control device and electronic device. Background Technology
[0002] Organic light-emitting diodes (OLEDs) and flat panel displays based on light-emitting diodes (LEDs) are widely used in various consumer electronics products such as wearable wristbands, wearable watches, mobile phones, televisions, laptops, and desktop computers due to their advantages such as high image quality, energy saving, thin body and wide range of applications, becoming the mainstream of display devices.
[0003] However, the performance of current OLED display products needs to be improved. Summary of the Invention
[0004] This application provides a display panel control method, a display panel control device, and an electronic device, which can reduce the power consumption of the display panel.
[0005] In a first aspect, embodiments of this application provide a display panel control method, including:
[0006] When the voltage value of the positive power supply of the display panel is a first preset voltage value, the voltage value of the negative power supply of the display panel is increased by a preset amount until the voltage value of the negative power supply is a second preset voltage value, which is less than the first preset voltage value.
[0007] During the process of increasing the voltage value of the negative power supply, the brightness value of the screen corresponding to each voltage value of the negative power supply is obtained;
[0008] Based on the voltage values and corresponding brightness values of the negative power supply, the correspondence between the voltage values and brightness values of the negative power supply is determined.
[0009] Based on the correspondence, candidate voltage values are determined from the voltage values of the negative power supply. Each candidate voltage value is a voltage value whose rate of change of brightness value is less than a preset rate of change among the voltage values of the negative power supply. The rate of change of brightness value is the rate at which brightness value changes with voltage value.
[0010] Determine the maximum voltage value among the candidate voltage values;
[0011] The display panel is powered on based on the first preset voltage value and the maximum voltage value.
[0012] In this embodiment, by fixing the voltage value of the positive power supply of the display panel to a first preset voltage value, the voltage value of the negative power supply of the display panel is gradually increased by a preset amount until the voltage value of the negative power supply is a second preset voltage value. During the process of increasing the voltage value of the negative power supply, the brightness value of the screen corresponding to each voltage value of the negative power supply is obtained. Based on each voltage value of the negative power supply and the corresponding brightness value, the correspondence between each voltage value of the negative power supply and the brightness value can be determined. Based on the correspondence, each candidate voltage value is determined from each voltage value of the negative power supply. Each candidate voltage value is a voltage value whose rate of change of the corresponding brightness value among each voltage value of the negative power supply is less than a preset rate of change. Therefore, by powering on the display panel based on the first preset voltage value and the maximum voltage value among each candidate voltage value, it can be ensured that when the brightness of the screen is relatively stable, the voltage difference (i.e., the cross voltage) between the first preset voltage value and the maximum voltage value is small. A small cross voltage can reduce the power consumption of the screen, thereby reducing the power consumption of the display panel.
[0013] Secondly, embodiments of this application provide a display panel control device, including:
[0014] A voltage amplification module is used to increase the voltage value of the negative power supply of the display panel by a preset amount when the voltage value of the positive power supply of the display panel is a first preset voltage value, until the voltage value of the negative power supply is a second preset voltage value, wherein the second preset voltage value is less than the first preset voltage value.
[0015] A brightness acquisition module is used to acquire the brightness value of the screen corresponding to each voltage value of the negative power supply during the process of increasing the voltage value of the negative power supply.
[0016] The relationship determination module is used to determine the correspondence between the voltage values and the brightness values of the negative power supply based on the voltage values and the corresponding brightness values of the negative power supply.
[0017] The candidate determination module is used to determine each candidate voltage value from each voltage value of the negative power supply based on the correspondence relationship. The candidate voltage value is a voltage value whose rate of change of the corresponding brightness value is less than a preset rate of change. The rate of change of the brightness value is the rate at which the brightness value changes with the voltage value.
[0018] A voltage determination module is used to determine the maximum voltage value among the candidate voltage values;
[0019] The panel power-on module is used to power on the display panel based on the first preset voltage value and the maximum voltage value.
[0020] Thirdly, embodiments of this application provide an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the electronic device implements the display panel control method as described in any one of the first aspects above.
[0021] Fourthly, embodiments of this application provide a computer-readable storage medium storing a computer program that, when executed by a computer, implements the display panel control method as described in the first aspect above.
[0022] Fifthly, embodiments of this application provide a computer program product, including a computer program that, when run, causes the display panel control method as described in any one of the first aspects above to be executed.
[0023] It is understood that the beneficial effects of the second to fifth aspects mentioned above can be found in the relevant descriptions in the first aspect mentioned above, and will not be repeated here. Attached Figure Description
[0024] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art 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.
[0025] Figure 1 This is a flowchart illustrating a display panel control method provided in an embodiment of this application;
[0026] Figure 2 This is an example diagram of the brightness curve;
[0027] Figure 3 This is another schematic flowchart of the display panel control method provided in the embodiments of this application;
[0028] Figure 4 This is another flowchart illustrating the display panel control method provided in the embodiments of this application;
[0029] Figure 5 This is a schematic diagram of the structure of the display panel control device provided in the embodiments of this application;
[0030] Figure 6 This is a schematic diagram of the structure of the electronic device provided in the embodiments of this application. Detailed Implementation
[0031] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application may also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods have been omitted so as not to obscure the description of this application with unnecessary detail.
[0032] It should be understood that, when used in this application specification and the appended claims, the term "comprising" indicates the presence of the described features, integrals, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or a collection thereof.
[0033] Furthermore, in the description of this application and the appended claims, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0034] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.
[0035] As display panel performance continues to improve, its high contrast, wide color gamut, and low latency have led to an increasing adoption rate in wearable watches, fitness trackers, and other electronic devices. However, these devices are limited by battery capacity, restricting their standby time and contradicting the demand for extended standby time. To address this contradiction, this application provides a display panel control method, a display panel control device, and an electronic device. In this embodiment, when the voltage value of the positive power supply of the display panel is fixed at a first preset voltage value, the voltage value of the negative power supply of the display panel is gradually increased by a preset amount until the voltage value of the negative power supply is a second preset voltage value. During the process of increasing the voltage value of the negative power supply, the brightness value of the screen corresponding to each voltage value of the negative power supply is obtained. Based on each voltage value of the negative power supply and the corresponding brightness value, the correspondence between each voltage value of the negative power supply and the brightness value can be determined. Based on the correspondence, each candidate voltage value is determined from each voltage value of the negative power supply. Each candidate voltage value is a voltage value whose rate of change of the corresponding brightness value among each voltage value of the negative power supply is less than a preset rate of change. Therefore, when the display panel is powered on based on the first preset voltage value and the maximum voltage value among each candidate voltage value, it can be ensured that when the brightness of the screen is relatively stable, the voltage difference (i.e., the cross voltage) between the first preset voltage value and the maximum voltage value is small. A small cross voltage can reduce the power consumption of the screen, thereby reducing the power consumption of the display panel.
[0036] For ease of understanding, this application describes an active matrix organic light-emitting diode (AMOLED) display panel as an example, but this does not constitute a limitation on the type of display panel.
[0037] AMOLED display panels have advantages such as fast response time, self-illumination, thinness, excellent display effect and lower power consumption, and have gradually become the mainstream choice in the display field.
[0038] Please see Figure 1 , Figure 1 The illustration shows a flowchart of a display panel control method provided in an embodiment of this application. This is an example and not a limitation; the method can be applied to electronic devices and includes the following steps:
[0039] Step 101: When the voltage of the positive power supply of the display panel is a first preset voltage value, increase the voltage of the negative power supply of the display panel by a preset amount until the voltage of the negative power supply is a second preset voltage value.
[0040] The second preset voltage value is lower than the first preset voltage value. Optionally, the first and second preset voltage values can be set according to the needs of the scenario. As an example and not a limitation, the first preset voltage value is 4.6V and the second preset voltage value is 0V.
[0041] The positive and negative power supplies of the screen are used to power the display pixel circuitry of the screen. The positive power supply of the screen can be ELVDD. The negative power supply of the screen can be ELVSS.
[0042] The preset amplitude can refer to the increase in the voltage value of the negative power supply of the screen. Optionally, the preset amplitude can be set according to the needs of the scenario. As an example and not a limitation, the preset amplitude is 0.1V.
[0043] The voltage value of the negative power supply of the screen is usually negative. By fixing the voltage value of the positive power supply of the screen to a first preset voltage value, and increasing the voltage value of the negative power supply of the screen by a preset amount until a second preset voltage value is reached, the maximum voltage value that can keep the brightness of the screen stable can be determined from the various voltage values of the negative power supply of the screen. The larger the voltage value of the negative power supply, the smaller the voltage difference between the positive and negative power supplies, the lower the power consumption of the screen, and the lower the power consumption of the display panel.
[0044] Step 102: During the process of increasing the voltage value of the negative power supply, obtain the brightness value of the screen corresponding to each voltage value of the negative power supply.
[0045] During the process of increasing the voltage value of the negative power supply, the brightness value of the screen is collected at the same time as the voltage value of the negative power supply changes, so as to obtain the brightness value of the screen corresponding to each voltage value of the negative power supply.
[0046] It should be understood that the brightness value of the screen can be collected by an electronic device or by other devices (such as a luminance meter) and then sent to the electronic device. This application does not limit this.
[0047] Step 103: Based on the voltage values and corresponding brightness values of the negative power supply, determine the correspondence between the voltage values and brightness values of the negative power supply.
[0048] Each voltage value of the negative power supply corresponds to a brightness value.
[0049] Step 104: Based on the correspondence, determine each candidate voltage value from the voltage values of the negative power supply.
[0050] Among them, the region where the rate of change of the brightness value corresponding to each voltage value of each candidate voltage value of the negative power supply is less than the preset rate of change, and the rate of change of the brightness value is the rate at which the brightness value changes with the voltage value.
[0051] The preset rate of change is used to determine the magnitude of the change in brightness value. A rate of change of brightness value less than the preset rate of change indicates that the change in brightness value is small, while a rate of change of brightness value greater than or equal to the preset rate of change indicates that the change in brightness value is large. Therefore, each candidate voltage value can also be understood as the voltage value among the voltage values of the negative power supply with the smallest change in brightness value or tending to be stable.
[0052] Optionally, a preset rate of change can be set according to the needs of the scenario.
[0053] Step 105: Determine the maximum voltage value among the candidate voltage values.
[0054] After determining each candidate voltage value, the candidate voltage values can be compared to obtain the maximum voltage value among them.
[0055] It should be understood that, in order to intuitively demonstrate the correspondence between the voltage values and brightness values of the negative power supply, a brightness curve can be used for visualization.
[0056] like Figure 2 The image shown is an example of a brightness curve. Figure 2 In this context, nit (nit) is the unit of brightness. Figure 2 In the brightness curve shown, when the voltage of the negative power supply is -3.5V (i.e. Figure 2 When the voltage value corresponding to the red solid line with arrows is reached, the rate of change of the brightness value increases significantly, that is, the brightness value changes from a slow decrease to a rapid decrease. Therefore, it can be determined that... Figure 2 In the brightness curve, each voltage value between -6V and -3.5V is a candidate voltage value. The red dashed line represents the rate of change of brightness value corresponding to each candidate voltage value (which can be represented by the slope). The maximum voltage value among all candidate voltage values is -3.5V.
[0057] In one embodiment, after determining the maximum voltage value among the candidate voltage values, further steps can be taken such as... Figure 3 Steps 301 and 302 shown indicate adjusting the reset voltage of the screen.
[0058] Step 301: Determine the target reset voltage value of the screen based on the maximum voltage value.
[0059] The reset voltage of the screen is usually greater than or equal to the voltage of the screen's negative power supply. Therefore, when selecting the maximum voltage value corresponding to the saturation region of the brightness curve as the final voltage value of the screen's negative power supply (i.e., the voltage value used by the negative power supply when powering on the screen), the target reset voltage value of the screen can be determined based on the maximum voltage value.
[0060] It should be understood that, provided the target reset voltage of the screen is greater than or equal to the maximum voltage, the target reset voltage can be set according to the needs of the scenario. As an example, and not a limitation, if the maximum voltage is -3.5V, then the target reset voltage of the screen can be -3.5V.
[0061] It should be understood that if the current reset voltage value of the screen is less than or greater than the target reset voltage value of the screen, then step 302 is executed; if the current reset voltage value of the screen is equal to the target reset voltage value of the screen, then there is no need to adjust the current reset voltage value of the screen, that is, there is no need to execute step 302.
[0062] Step 302: Under the constraint of minimizing the integrated circuit power consumption generated when adjusting the current reset voltage value of the screen, adjust the current reset voltage value of the screen to the target reset voltage value.
[0063] The integrated circuit power consumption generated when adjusting the current reset voltage value of the screen can refer to the integrated circuit power consumption generated when adjusting the current reset voltage value of the screen to the target reset voltage value.
[0064] It should be understood that this application does not limit the specific type of integrated circuit. By way of example and not limitation, the aforementioned integrated circuit can be a display driver IC (DDIC).
[0065] When adjusting the current reset voltage value of the screen to the target reset voltage value, there are usually several first adjustment methods to achieve the target reset voltage value. By using the first adjustment method with the lowest integrated circuit power consumption to achieve the target reset voltage value, the power consumption of the integrated circuit can be reduced, thereby reducing the power consumption of the display panel.
[0066] It should be understood that when the current reset voltage value is less than the target reset voltage value, the first adjustment method can be understood as a boost method; when the current reset voltage value is greater than the target reset voltage value, the first adjustment method can be understood as a buck method.
[0067] In one possible implementation, step 302 above may include:
[0068] Under the condition of minimizing the power consumption of the integrated circuit when constraining the current reset voltage value of the screen, a second buck-boost ratio of at least one power supply method is determined based on the target reset voltage value;
[0069] Based on the second step-up / step-down ratio of each power supply method, the current reset voltage value of the screen is adjusted to the target reset voltage value.
[0070] The power supply methods mentioned above are inherent to the integrated circuits of the display panel. Each power supply method typically corresponds to at least one buck-boost ratio, which is also inherent to the integrated circuit.
[0071] The buck-boost ratio is the ratio of the output voltage to the input voltage for the corresponding power supply mode, and the input voltage for the power supply mode can be preset. The output voltage corresponding to the second buck-boost ratio can be determined by the target reset voltage value.
[0072] It should be understood that the power supply methods and corresponding step-up / step-down ratios of integrated circuits produced by different integrated circuit manufacturers may be the same or different.
[0073] Optionally, after determining the second buck-boost ratio of at least one power supply method, when powering on the display panel, the current reset voltage value of the screen can be adjusted to the target reset voltage value based on the second buck-boost ratio of each power supply method.
[0074] Optionally, the integrated circuit may include two power supply methods: analog circuit power supply (VCI) and input / output (I / O) power supply (VDDIO). VCI powers the analog circuit portion of the integrated circuit, while VDDIO powers the I / O interface. The buck-boost ratio of VCI can be understood as the ratio of its output voltage to its input voltage, or the ratio of the integrated circuit's analog output voltage to its analog input voltage. Similarly, the buck-boost ratio of VDDIO can be understood as the ratio of its output voltage to its input voltage, or the ratio of the integrated circuit's I / O output voltage to its I / O input voltage.
[0075] As an example rather than a limitation, VCI includes five buck-boost ratios: -2, -1, 0, 1, and 2. A buck-boost ratio of 0 for VCI can be understood as not using VCI for power supply. The input voltage of VCI is 3.3V. VDDIO includes three buck-boost ratios: -1, 0, and 1. A buck-boost ratio of 0 for VCI can be understood as not using VDDIO for power supply. The current reset voltage of the screen is -4V, and the target reset voltage is -3.5V. Both the first adjustment method using a VCI of -1 (i.e., the second buck-boost ratio of VCI is -1) and a VDDIO of -1 (i.e., the second buck-boost ratio of VDDIO is -1) and the first adjustment method using a VCI of -2 (i.e., the second buck-boost ratio of VCI is -2) can achieve the target reset voltage. However, the power consumption of VCI when supplying power is usually greater than that of VDDIO. Therefore, it can be determined that the first adjustment method using a VCI of -1 and a VDDIO of -1 generates the least power consumption in the integrated circuit. Thus, a VCI of -1 and a VDDIO of -1 can be used to adjust the current reset voltage to the target reset voltage, thereby reducing the power consumption of the analog section of the integrated circuit and consequently reducing the power consumption of the display panel.
[0076] Step 106: Power on the display panel based on the first preset voltage value and the maximum voltage value.
[0077] Power on the display panel when the voltage of the positive power supply to the screen is the first preset voltage value and the voltage of the negative power supply to the screen is the maximum voltage value.
[0078] In one embodiment, after powering on the display panel, the required white state voltage value (VGSP) can be determined to provide users with a better visual experience. The white state voltage value is the voltage value when the screen displays a white state image, and the method for determining the white state voltage value is as follows:
[0079] Obtain the register values of the red, green, and blue sub-pixels at the maximum grayscale.
[0080] The voltage value of the red sub-pixel is determined based on the register value of the red sub-pixel;
[0081] The voltage value of the green sub-pixel is determined based on the register value of the green sub-pixel;
[0082] The voltage value of the blue sub-pixel is determined based on the register value of the blue sub-pixel;
[0083] The minimum value among the voltage values of the red sub-pixel, the green sub-pixel, and the blue sub-pixel is determined as the white state voltage value of the screen.
[0084] The image corresponding to the highest grayscale level is a white image. Red, green, and blue subpixels are the three basic units that make up each pixel on the display panel. The red subpixel is responsible for displaying red, the green subpixel for displaying green, and the blue subpixel for displaying blue. Each grayscale level corresponds to a set of register values, which includes the register values of the red, green, and blue subpixels at that grayscale level.
[0085] The register value of a red subpixel can refer to the number of grayscale precisions corresponding to that red subpixel. This number of grayscale precisions refers to the number of times the red subpixel's brightness value can reach the brightness value corresponding to a white state image. Similarly, the register value of a green subpixel can refer to the number of grayscale precisions corresponding to that green subpixel. The same applies to blue subpixels.
[0086] Grayscale precision can refer to the number of equal parts into which a pre-set initial data voltage value is divided. In one embodiment, the initial data voltage value can be divided by 2. N This yields the grayscale precision, where N represents the number of grayscale bits supported by the integrated circuit. The number of grayscale bits can be understood as the number of binary bits in the grayscale.
[0087] The register values of the red, green, and blue subpixels are usually in hexadecimal. First, convert these values to decimal to obtain the first value for the red subpixel, the second value for the green subpixel, and the third value for the blue subpixel. Multiplying the first value by the grayscale precision yields the voltage value of the red subpixel; multiplying the second value by the grayscale precision yields the voltage value of the green subpixel; and multiplying the third value by the grayscale precision yields the voltage value of the blue subpixel.
[0088] For the voltage values of the red, green, and blue sub-pixels, the higher the voltage value, the brighter the corresponding sub-pixel, and the lower the voltage value, the dimmer the corresponding sub-pixel. Therefore, in order to ensure that the brightness of the red, green, and blue sub-pixels can all reach the brightness required by the screen (for example, the brightness values of the red, green, and blue sub-pixels can all reach the brightness values corresponding to the white state screen), the minimum value among the voltage values of the red, green, and blue sub-pixels can be determined as the white state voltage value.
[0089] In one embodiment, after powering on the display panel, it can also be done via, as shown in the example... Figure 4 Steps 401 to 403 show adjusting the voltage value of the analog positive power supply.
[0090] Step 401: Obtain the target black state voltage value of the screen.
[0091] The target black-state voltage value is the required black-state voltage value (VGMP) for the display panel. For example, this requirement could be the target voltage value for the analog positive power supply used to determine the integrated circuits of the display panel. The black-state voltage value is the voltage value when the screen displays a black image. The black-state voltage value is typically greater than the white-state voltage value.
[0092] After obtaining the white state voltage value and the target black state voltage value of the screen, the target data voltage value of the screen can be determined based on the white state voltage value and the target black state voltage value. The brightness of the pixels can be controlled based on the target data voltage value.
[0093] In one possible implementation, step 401 above may include:
[0094] Obtain the actual brightness value of the screen at the minimum grayscale;
[0095] If the actual brightness value is less than or equal to the target brightness value, adjust the black state voltage value of the screen until the actual brightness value is greater than the target brightness value.
[0096] The target black state voltage value is determined based on the minimum value among all black state voltage values that make the actual brightness value less than or equal to the target brightness value.
[0097] The minimum grayscale corresponds to a black screen. The target brightness value is the desired brightness level at the minimum grayscale. Optionally, the target brightness value can be set according to scene requirements. As an example and not a limitation, the target brightness value is 0.006 nits.
[0098] At the minimum grayscale, the actual brightness value of the screen can be adjusted by adjusting the black state voltage value. The actual brightness value of the screen is then compared with the target brightness value until the actual brightness value is greater than the target brightness value. To reduce the power consumption of the integrated circuit, the target black state voltage value can be determined based on the minimum value among all black state voltage values that make the actual brightness value less than or equal to the target brightness value, while ensuring that the actual brightness value of the screen at the minimum grayscale meets the requirement of the target brightness value (i.e., the actual brightness value is less than or equal to the target brightness value).
[0099] In one possible implementation, the minimum value can be determined as the target black-state voltage value; alternatively, the minimum value can be added to a third preset voltage value to obtain the target black-state voltage value.
[0100] The third preset voltage value is a small, pre-set value to provide a certain safety margin or error range. The result of adding the minimum value to the third preset voltage value is determined as the target black state voltage value, which can reduce the possibility of the screen showing a black-to-brightness phenomenon, thereby ensuring that the screen can still stably display a black state image in actual scenarios.
[0101] Step 402: Based on the target black-state voltage value, determine the target voltage value of the analog positive power supply of the integrated circuit of the display panel.
[0102] In this context, the analog positive power supply of the integrated circuit can refer to AVDD.
[0103] The voltage value of the analog positive power supply of an integrated circuit is usually greater than or equal to the black state voltage value of the screen. Therefore, the voltage value of the analog positive power supply can be dynamically adjusted based on the black state voltage value.
[0104] It should be understood that, provided the target voltage of the analog positive power supply of the integrated circuit is greater than or equal to the target black-state voltage of the screen, the target voltage value can be set according to the requirements of the scenario. As an example and not a limitation, if the target black-state voltage is 4V, then the target voltage of the analog positive power supply can be 5.1V.
[0105] It should be understood that if the current voltage value of the simulated positive power supply is less than or greater than the target voltage value of the simulated positive power supply, then step 403 is executed; if the current voltage value of the simulated positive power supply is equal to the target voltage value of the simulated positive power supply, then there is no need to adjust the current voltage value of the simulated positive power supply, that is, there is no need to execute step 403.
[0106] Step 403: Under the constraint of minimizing the power consumption of the integrated circuit when adjusting the current voltage value of the analog positive power supply, adjust the current voltage value of the analog positive power supply to the target voltage value.
[0107] The power consumption of the integrated circuit generated when adjusting the current voltage value of the analog positive power supply can refer to the power consumption of the integrated circuit generated when adjusting the current voltage value of the analog positive power supply to the target voltage value.
[0108] When adjusting the current voltage value of the analog positive power supply to the target voltage value, there are usually several secondary adjustment methods to achieve the target voltage value. By using the secondary adjustment method with the lowest power consumption of the integrated circuit to achieve the target voltage value, the power consumption of the integrated circuit can be reduced, thereby reducing the power consumption of the display panel.
[0109] It should be understood that when the current voltage value is less than the target voltage value, the second adjustment method can be understood as a voltage boosting method; when the current voltage value is greater than the target voltage value, the second adjustment method can be understood as a voltage bucking method.
[0110] In one possible implementation, step 403 above may include:
[0111] Under the constraint of minimizing the power consumption of the integrated circuit when adjusting the current voltage value of the analog positive power supply, a first buck-boost ratio of at least one power supply method is determined based on the target voltage value.
[0112] Based on the first step-up / step-down ratio of each power supply method, power is supplied to the simulated positive power supply to adjust the current voltage value of the simulated positive power supply to the target voltage value.
[0113] The power supply method and buck-boost ratio are described in step 302 and will not be repeated here. The output voltage corresponding to the first buck-boost ratio can be determined by the target voltage value.
[0114] As an example rather than a limitation, VCI includes five buck-boost ratios: -2, -1, 0, 1, and 2. A buck-boost ratio of 0 for VCI can be understood as not using VCI for power supply. The input voltage of VCI is 3.3V. VDDIO includes three buck-boost ratios: -1, 0, and 1. A buck-boost ratio of 0 for VCI can be understood as not using VDDIO for power supply. The current voltage of the simulated positive power supply is -4V, and the target voltage is 5.1V. Both a second adjustment method using a VCI with a first step-up / step-down ratio of 1 and a VDDIO with a first step-up / step-down ratio of 1, and a second adjustment method using a VCI with a first step-up / step-down ratio of 2, can achieve the target voltage. However, the power consumption of VCI when supplying power is typically greater than that of VDDIO. Therefore, it can be determined that the second adjustment method using a VCI with a first step-up / step-down ratio of 1 and a VDDIO generates the least power consumption in the integrated circuit. Thus, a VCI with a first step-up / step-down ratio of 1 and a VDDIO can be used to adjust the current voltage of the simulated positive power supply to the target voltage, thereby reducing the power consumption of the analog section of the integrated circuit and consequently reducing the power consumption of the display panel.
[0115] In this embodiment, by fixing the voltage value of the positive power supply of the display panel to a first preset voltage value, the voltage value of the negative power supply of the display panel is gradually increased by a preset amount until the voltage value of the negative power supply is a second preset voltage value. During the process of increasing the voltage value of the negative power supply, the brightness value of the screen corresponding to each voltage value of the negative power supply is obtained. Based on each voltage value of the negative power supply and the corresponding brightness value, the correspondence between each voltage value of the negative power supply and the brightness value can be determined. Based on the correspondence, each candidate voltage value is determined from each voltage value of the negative power supply. Each candidate voltage value is a voltage value whose rate of change of the corresponding brightness value among each voltage value of the negative power supply is less than a preset rate of change. Therefore, by powering on the display panel based on the first preset voltage value and the maximum voltage value among each candidate voltage value, it can be ensured that when the brightness of the screen is relatively stable, the voltage difference (i.e., the cross voltage) between the first preset voltage value and the maximum voltage value is small. A small cross voltage can reduce the power consumption of the screen, thereby reducing the power consumption of the display panel.
[0116] It should be understood that the sequence number of each step in the above embodiments does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.
[0117] Corresponding to the display panel control method described in the above embodiments, Figure 5 A schematic diagram of the display panel control device provided in an embodiment of this application is shown. For ease of explanation, only the parts related to the embodiment of this application are shown.
[0118] Reference Figure 5 The device includes:
[0119] The voltage amplification module 501 is used to increase the voltage value of the negative power supply of the display panel by a preset amount when the voltage value of the positive power supply of the display panel is a first preset voltage value, until the voltage value of the negative power supply is a second preset voltage value, wherein the second preset voltage value is less than the first preset voltage value.
[0120] The brightness acquisition module 502 is used to acquire the brightness value of the screen corresponding to each voltage value of the negative power supply during the process of increasing the voltage value of the negative power supply.
[0121] The relationship determination module 503 is used to determine the correspondence between the voltage values and the brightness values of the negative power supply based on the voltage values and the corresponding brightness values of the negative power supply.
[0122] The candidate determination module 504 is used to determine each candidate voltage value from each voltage value of the negative power supply based on the correspondence relationship. Each candidate voltage value is a voltage value whose rate of change of the corresponding brightness value is less than a preset rate of change. The rate of change of the brightness value is the rate at which the brightness value changes with the voltage value.
[0123] Voltage determination module 505 is used to determine the maximum voltage value among the candidate voltage values;
[0124] The panel power-on module 506 is used to power on the display panel based on the first preset voltage value and the maximum voltage value.
[0125] Optionally, the above-mentioned device further includes:
[0126] A voltage acquisition module is used to acquire the target black state voltage value of the screen.
[0127] The target determination module is used to determine the target voltage value of the analog positive power supply of the integrated circuit of the display panel based on the target black state voltage value;
[0128] The first adjustment module is used to adjust the current voltage value of the simulated positive power supply to the target voltage value under the constraint of minimizing the integrated circuit power consumption generated when adjusting the current voltage value of the simulated positive power supply.
[0129] Optionally, the first adjustment module mentioned above is specifically used for:
[0130] Under the constraint of minimizing the integrated circuit power consumption when adjusting the current voltage value of the simulated positive power supply, a first buck-boost ratio for at least one power supply method is determined based on the target voltage value;
[0131] Based on the first step-up / step-down ratio of each power supply method, power is supplied to the simulated positive power supply to adjust the current voltage value of the simulated positive power supply to the target voltage value.
[0132] Optionally, the voltage acquisition module mentioned above includes:
[0133] A brightness acquisition unit is used to acquire the actual brightness value of the screen at the minimum gray level;
[0134] A voltage adjustment unit is used to adjust the black state voltage of the screen if the actual brightness value is less than or equal to the target brightness value, until the actual brightness value is greater than the target brightness value.
[0135] A voltage determination unit is used to determine the target black state voltage value based on the minimum value among all black state voltage values that make the actual brightness value less than or equal to the target brightness value.
[0136] Optionally, the voltage determination unit described above is specifically used for:
[0137] The minimum value is determined as the target black-state voltage value;
[0138] Alternatively, the minimum value can be added to the third preset voltage value to obtain the target black state voltage value.
[0139] Optionally, the above-mentioned device further includes:
[0140] A reset determination module is used to determine the target reset voltage value of the screen based on the maximum voltage value;
[0141] The second adjustment module is used to adjust the current reset voltage value of the screen to the target reset voltage value under the constraint of minimizing the integrated circuit power consumption generated when adjusting the current reset voltage value of the screen.
[0142] Optionally, the second adjustment module mentioned above is specifically used for:
[0143] Under the constraint of minimizing the integrated circuit power consumption when adjusting the current reset voltage value of the screen, a second buck-boost ratio of at least one power supply method is determined based on the target reset voltage value.
[0144] Based on the second step-up / step-down ratio of each power supply method, the current reset voltage value of the screen is adjusted to the target reset voltage value.
[0145] Optionally, the above-mentioned device further includes:
[0146] The register acquisition module is used to acquire the register values of the red sub-pixels, green sub-pixels, and blue sub-pixels at the maximum grayscale.
[0147] The first determining module is used to determine the voltage value of the red sub-pixel based on the register value of the red sub-pixel;
[0148] The second determining module is used to determine the voltage value of the green sub-pixel based on the register value of the green sub-pixel;
[0149] The third determining module is used to determine the voltage value of the blue sub-pixel based on the register value of the blue sub-pixel;
[0150] The white state determination module is used to determine the minimum value among the voltage values of the red sub-pixel, the green sub-pixel, and the blue sub-pixel as the white state voltage value of the screen.
[0151] It should be noted that the information interaction and execution process between the above-mentioned devices / units are based on the same concept as the method embodiments of this application. For details on their specific functions and technical effects, please refer to the method embodiments section, and they will not be repeated here.
[0152] Figure 6 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Figure 6 As shown, the electronic device 6 of this embodiment includes: at least one processor 60 ( Figure 6 (Only one is shown in the diagram), memory 61, and computer program 62 stored in said memory 61 and executable on said at least one processor 60, which, when executed, implements the steps in any of the above method embodiments.
[0153] The electronic device may include, but is not limited to, a processor 60 and a memory 61. Those skilled in the art will understand that... Figure 6 This is merely an example of electronic device 6 and does not constitute a limitation on electronic device 6. It may include more or fewer components than shown, or combine certain components, or different components, such as input / output devices, network access devices, etc.
[0154] The processor 60 may be a Central Processing Unit (CPU), or it may be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor.
[0155] In some embodiments, the memory 61 may be an internal storage unit of the electronic device 6, such as a hard disk or memory of the electronic device 6. In other embodiments, the memory 61 may be an external storage device of the electronic device 6, such as a plug-in hard disk, smart media card (SMC), secure digital (SD) card, flash card, etc., equipped on the electronic device 6. Furthermore, the memory 61 may include both internal and external storage units of the electronic device 6. The memory 61 is used to store the operating system, applications, bootloader, data, and other programs, such as the program code of the computer program. The memory 61 can also be used to temporarily store data that has been output or will be output.
[0156] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional units and modules is merely an example. In practical applications, the above functions can be assigned to different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiments can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit. Furthermore, the specific names of the functional units and modules are only for easy differentiation and are not intended to limit the scope of protection of this application. The specific working process of the units and modules in the above system can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.
[0157] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, 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 computer-readable storage medium, and when executed by a processor, it can implement the steps of the various method embodiments described above. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. The computer-readable medium can include at least: any entity or device capable of carrying computer program code to a device / electronic device, a recording medium, a computer memory, a read-only memory (ROM), a random access memory (RAM), an electrical carrier signal, a telecommunication signal, and a software distribution medium. Examples include USB flash drives, portable hard drives, magnetic disks, or optical disks.
[0158] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.
[0159] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.
[0160] In the embodiments provided in this application, it should be understood that the disclosed devices / electronic devices and methods can be implemented in other ways. For example, the device / electronic device embodiments described above are merely illustrative. For instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual couplings or direct couplings or communication connections may be through some interfaces; indirect couplings or communication connections between devices or units may be electrical, mechanical, or other forms.
[0161] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.
[0162] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.
Claims
1. A display panel control method, characterized in that, include: When the voltage value of the positive power supply of the display panel is a first preset voltage value, the voltage value of the negative power supply of the display panel is increased by a preset amount until the voltage value of the negative power supply is a second preset voltage value, which is less than the first preset voltage value. During the process of increasing the voltage value of the negative power supply, the brightness value of the screen corresponding to each voltage value of the negative power supply is obtained; Based on the voltage values and corresponding brightness values of the negative power supply, the correspondence between the voltage values and brightness values of the negative power supply is determined. Based on the correspondence, candidate voltage values are determined from the voltage values of the negative power supply. Each candidate voltage value is a voltage value whose rate of change of brightness value is less than a preset rate of change among the voltage values of the negative power supply. The rate of change of brightness value is the rate at which brightness value changes with voltage value. Determine the maximum voltage value among the candidate voltage values; The display panel is powered on based on the first preset voltage value and the maximum voltage value.
2. The display panel control method according to claim 1, characterized in that, After powering on the display panel, the following steps are also included: Obtain the target black state voltage value of the screen; Based on the target black state voltage value, determine the target voltage value of the analog positive power supply of the integrated circuit of the display panel; Under the constraint of minimizing the integrated circuit power consumption generated when adjusting the current voltage value of the simulated positive power supply, the current voltage value of the simulated positive power supply is adjusted to the target voltage value.
3. The display panel control method according to claim 2, characterized in that, Adjusting the current voltage value of the simulated positive power supply to the target voltage value while minimizing the integrated circuit power consumption during the adjustment of the current voltage value of the simulated positive power supply includes: Under the constraint of minimizing the integrated circuit power consumption when adjusting the current voltage value of the simulated positive power supply, a first buck-boost ratio for at least one power supply method is determined based on the target voltage value; Based on the first step-up / step-down ratio of each power supply method, power is supplied to the simulated positive power supply to adjust the current voltage value of the simulated positive power supply to the target voltage value.
4. The display panel control method according to claim 2, characterized in that, The step of obtaining the target black state voltage value of the screen includes: Obtain the actual brightness value of the screen at the minimum gray level; If the actual brightness value is less than or equal to the target brightness value, then adjust the black state voltage value of the screen until the actual brightness value is greater than the target brightness value; The target black state voltage value is determined based on the minimum value among all black state voltage values that make the actual brightness value less than or equal to the target brightness value.
5. The display panel control method according to claim 4, characterized in that, The step of determining the target black state voltage value based on the minimum value among all black state voltage values that make the actual brightness value less than or equal to the target brightness value includes: The minimum value is determined as the target black-state voltage value; Alternatively, the minimum value can be added to the third preset voltage value to obtain the target black state voltage value.
6. The display panel control method according to any one of claims 1 to 5, characterized in that, After determining the maximum voltage value corresponding to the saturation region, the process further includes: Based on the maximum voltage value, determine the target reset voltage value of the screen. Under the constraint of minimizing the integrated circuit power consumption generated when adjusting the current reset voltage value of the screen, the current reset voltage value of the screen is adjusted to the target reset voltage value.
7. The display panel control method according to claim 6, characterized in that, Adjusting the current reset voltage of the screen to the target reset voltage value while minimizing the integrated circuit power consumption during the adjustment of the current reset voltage value of the screen includes: Under the constraint of minimizing the integrated circuit power consumption when adjusting the current reset voltage value of the screen, a second buck-boost ratio of at least one power supply method is determined based on the target reset voltage value. Based on the second step-up / step-down ratio of each power supply method, the current reset voltage value of the screen is adjusted to the target reset voltage value.
8. The display panel control method according to any one of claims 1 to 5, characterized in that, After powering on the display panel, the following steps are also included: Obtain the register values of the red, green, and blue sub-pixels at the maximum grayscale. The voltage value of the red sub-pixel is determined based on the register value of the red sub-pixel; The voltage value of the green sub-pixel is determined based on the register value of the green sub-pixel; The voltage value of the blue sub-pixel is determined based on the register value of the blue sub-pixel; The minimum value among the voltage values of the red sub-pixel, the green sub-pixel, and the blue sub-pixel is determined as the white state voltage value of the screen.
9. A display panel control device, characterized in that, include: A voltage amplification module is used to increase the voltage value of the negative power supply of the display panel by a preset amount when the voltage value of the positive power supply of the display panel is a first preset voltage value, until the voltage value of the negative power supply is a second preset voltage value, wherein the second preset voltage value is less than the first preset voltage value. A brightness acquisition module is used to acquire the brightness value of the screen corresponding to each voltage value of the negative power supply during the process of increasing the voltage value of the negative power supply. The relationship determination module is used to determine the correspondence between the voltage values and the brightness values of the negative power supply based on the voltage values and the corresponding brightness values of the negative power supply. The candidate determination module is used to determine each candidate voltage value from each voltage value of the negative power supply based on the correspondence relationship. The candidate voltage value is a voltage value whose rate of change of the corresponding brightness value is less than a preset rate of change. The rate of change of the brightness value is the rate at which the brightness value changes with the voltage value. A voltage determination module is used to determine the maximum voltage value among the candidate voltage values; The panel power-on module is used to power on the display panel based on the first preset voltage value and the maximum voltage value.
10. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it causes the electronic device to implement the display panel control method as described in any one of claims 1 to 8.