Mapping relationship generation method, voltage control method for display apparatus, and related device

Abstract

Provided in the present disclosure are a mapping relationship generation method, a voltage control method for a display apparatus, and a related device. The mapping relationship generation method comprises: determining a first refresh rate parameter and a first display area parameter of a display picture in a display apparatus; according to a preset voltage gradient, adjusting a driving voltage of the display apparatus, and determining a first target display parameter difference which meets a preset display parameter condition and is among one or more display parameter differences of the display apparatus under each pair of adjacent driving voltages; on the basis of the first target display parameter difference, determining a first target driving voltage under the first refresh rate parameter and the first display area parameter; and generating a mapping relationship between the first refresh rate parameter, the first display area parameter and the first target driving voltage. Thus, the determined first target driving voltage is more accurate, and power consumption can be reduced while high-luminance uniformity is ensured.

Description

Mapping relationship generation method, voltage control method for display device and related equipment

[0001] This application claims priority to Chinese Patent Application No. 202410683585.5, filed on May 29, 2024, entitled "Mapping Relationship Generation Method, Voltage Control Method for Display Device and Related Equipment", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This disclosure relates to the field of display technology, and in particular to a mapping relationship generation method, a voltage control method for a display device, and related equipment. Background Technology

[0003] OLED (Organic Light-Emitting Diode), also known as Organic Electroluminescence Display or Organic Light-Emitting Semiconductor, is a current-driven organic light-emitting device that emits light through the injection and recombination of charge carriers.

[0004] In related technologies, how to reduce the power consumption of OLED devices while ensuring display quality is a problem that is being addressed. Summary of the Invention

[0005] In view of this, the purpose of this disclosure is to provide a mapping relationship generation method, a voltage control method for a display device, and related equipment.

[0006] To achieve the above objectives, the first aspect of this disclosure proposes a method for generating mapping relationships, the method comprising:

[0007] A first refresh rate parameter and a first display area parameter are determined in the display device, wherein the first display area parameter indicates the proportion of the area occupied by the bright area in the display screen;

[0008] The driving voltage of the display device is gradually adjusted according to a preset voltage gradient, and the changes in display parameters of the display device under different driving voltage values ​​are obtained as the driving voltage is gradually adjusted to determine a first target driving voltage. The first target driving voltage is the voltage value of the driving voltage that makes the display device meet the display performance conditions. The driving voltage includes the cathode power supply voltage of the light-emitting element in the pixel of the display device; and...

[0009] A mapping relationship is generated between the first refresh rate parameter, the first display area parameter, and the first target driving voltage, so that the display device can determine the driving voltage value that satisfies the display performance conditions of the display device corresponding to the refresh rate and display area parameter used through the mapping relationship.

[0010] Based on the same inventive concept, a second aspect of this disclosure provides a voltage control method for a display device, the method comprising:

[0011] Obtain the target refresh rate of the current screen on the display device;

[0012] Obtain the target display area parameters of the current screen on the display device;

[0013] The mapping relationship is obtained using the mapping relationship generation method described in the first aspect;

[0014] Based on the mapping relationship, the target driving voltage corresponding to the target refresh rate and the target display area parameter is determined, and the power supply component of the display device is controlled to provide the target driving voltage.

[0015] Based on the same inventive concept, a third aspect of this disclosure proposes an electronic device including a memory, a processor, and a computer program stored in the memory and executable by the processor, wherein the processor implements the method described above when executing the computer program.

[0016] Based on the same inventive concept, a fourth aspect of this disclosure provides a non-transitory computer-readable storage medium that stores computer instructions for causing a computer to perform the methods described above.

[0017] Based on the same inventive concept, a fifth aspect of this disclosure provides a computer program product comprising computer program instructions that, when executed on a computer, cause the computer to perform the method described above. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in this disclosure or related technologies, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are only embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 shows an OLED display according to an embodiment of this disclosure. ds -V ds A schematic diagram of the redundant voltage drop curve;

[0020] Figure 2 is a schematic diagram of the driving timing for conventional refresh rate and high refresh rate in OLED display according to an embodiment of this disclosure;

[0021] Figure 3 is a schematic diagram of the differences in OLED power consumption and temperature at different frequencies during OLED high-brightness display (3Pusle) according to an embodiment of the present disclosure;

[0022] Figure 4 is a schematic diagram of the differences in OLED power consumption and temperature at different frequencies during OLED high-brightness display (18Pusle) according to an embodiment of the present disclosure;

[0023] Figure 5 is a schematic diagram comparing the data flow of OLED full-screen high grayscale display and common display scenarios according to an embodiment of the present disclosure;

[0024] Figure 6 shows the OLED display in an embodiment of this disclosure. ds -V ds Curve and device operating curve V op A schematic diagram;

[0025] Figure 7 shows the OLED high refresh rate and high brightness display according to an embodiment of this disclosure. ds -V ds With device operating curve V op Schematic diagram;

[0026] Figure 8 shows the OLED display in an embodiment of this disclosure. ds -V ds Curve and operating curves of different devices V op Schematic diagram;

[0027] Figure 9 shows the OLED display in an embodiment of this disclosure. ds -V ds Curves and device operating curves in different display areas V op Schematic diagram;

[0028] Figure 10 is a flowchart of the mapping relationship generation method according to an embodiment of this disclosure;

[0029] Figure 11 is a schematic diagram showing the correspondence between the first target driving voltage and the calibration value corresponding to the display brightness in an embodiment of this disclosure;

[0030] Figure 12 is a schematic diagram of the mapping relationship generation system according to an embodiment of this disclosure;

[0031] Figure 13 is a schematic diagram of the mapping relationship generation method according to an embodiment of the present disclosure;

[0032] Figure 14 is a schematic diagram of the mapping relationship in an embodiment of this disclosure;

[0033] Figure 15 is a schematic diagram of the pixel driving circuit according to an embodiment of the present disclosure;

[0034] Figure 16 is a flowchart of a voltage control method for a display device according to another embodiment of the present disclosure;

[0035] Figure 17 is a schematic diagram of the structure of the first target driving voltage portion register in a driver IC according to another embodiment of the present disclosure;

[0036] Figure 18 is a schematic diagram of a voltage control method for a display device according to another embodiment of the present disclosure;

[0037] Figure 19 is a schematic diagram of the structure of an electronic device according to an embodiment of this disclosure. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of this disclosure clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.

[0039] It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this disclosure should have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms "first," "second," and similar terms used in the embodiments of this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0040] Active-matrix organic light-emitting diode (AMOLED) is a display technology.

[0041] The low power consumption requirement of AMOLED has become a key research focus in the market for terminal power management technology. This is achieved by identifying the source-drain voltage (V) of the driving thin-film transistor (TFT) in the pixel circuit. ds Using redundant voltage drops to dynamically scale the cathode power supply voltage (VSS) of an OLED is an effective method to reduce the power consumption of OLED displays. This method can reduce power consumption while ensuring high brightness uniformity.

[0042] Figure 1 shows an OLED display according to an embodiment of this disclosure. ds -Vds A schematic diagram of the redundant voltage drop curve. As shown in Figure 1, Figure 1 includes I corresponding to high grayscale and low grayscale respectively. ds -V ds Relationship curve, based on V ds Pinch-off point determines whether a device is operating in the linear or saturation region, V ds Pinch point and V ds Setting value (V) ds The voltage drop between the sets is redundant. Within the linear region (linear operating region), the MOSFET can be considered a variable resistor controlled by the gate-source voltage, and the source-drain current (Id) is... ds As the source-drain voltage (V) increases ds The voltage increases linearly with the increase of the source-drain voltage (V). Within the saturation region (saturation operating region), the voltage increases linearly with the increase of the source-drain voltage (V). ds As the current continues to increase, the channel begins to pinch off near the drain, limiting the source-drain current (Id). ds The increase of ) is I ds It remains essentially unchanged or increases very slowly. The DTFT has a sufficiently large source-drain voltage (V). ds This allows the DTFT to operate in the saturation region, due to the I in the saturation region. ds If the current is basically constant, then the difference between the drain voltage and the pinch-off point (the intersection of the linear region and the saturation region) is the redundant voltage drop.

[0043] In related technologies, the dynamic scaling VSS strategy has three problems: First, it identifies V based on the conventional refresh rate (120Hz & low pulse count). ds Redundant voltage drop, without considering the impact of screen temperature on V at high refresh rates (>144Hz & high Pulse count). ds The impact of redundant voltage drop, where high refresh rate refers to the number of times the screen can update the displayed content per second, usually defined as greater than 120Hz. Pulse count is the number of times the screen controls the OLED device to switch on / off (emission on / off) within one frame refresh time at the corresponding refresh rate; secondly, based on full-screen high grayscale display recognition V ds The redundancy voltage drop does not take into account the different proportions of high grayscale; thirdly, the VSS scaling adjustment uses a preset value method, that is, all products use the same set of fixed parameters, and the differences between individual products will lead to unqualified high brightness uniformity and power consumption indicators.

[0044] The dynamic scaling VSS voltage strategy of related technologies identifies redundant voltage drops based on the conventional refresh rate (usually 120Hz & 3Pulse in LTPO2.0 circuits). However, with the widespread application of mobile terminals in e-sports, high-definition real-time video and other scenarios, high refresh rates (≥144Hz & ≥18pulse) have gradually become one of the development focuses of OLED.

[0045] Figure 2 is a schematic diagram of the driving timing for conventional and high refresh rates in an OLED display according to an embodiment of this disclosure. As shown in Figure 2, compared to a conventional refresh rate of 120Hz & 3Pulse, a high refresh rate of 144Hz & 18pulse refreshes and holds more frames in the same amount of time. As can be seen from the definition of a high refresh rate, due to the higher frequency of data writing in a shorter refresh time, the total power consumption generally increases by 3% to 5%, and the power consumption of the driver IC used to control peripherals or sensors generally increases by 20% to 30%, especially in high-brightness scenarios (>1000 nits), where the screen temperature rises by at least 6 to 8°C due to the power consumption of the driver IC.

[0046] As shown in Figures 3 and 4, compared to a 3-pusle high-brightness display, an 18-pusle high-brightness display experiences a 4°C increase in temperature at the same brightness, resulting in a significant increase in DIC power consumption, EL power consumption, and total power consumption. The effect of temperature on redundant voltage drop can generally be attributed to the following: increased temperature leads to increased carrier concentration, thereby reducing the voltage required to form a conductive channel, i.e., the threshold voltage V of the MOSFET. th Positive bias, thus making V ds The position of the break point is shifted to the left, that is, at a lower V. ds The value reaches the saturation region. Therefore, current dynamic scaling strategies urgently need to consider the high refresh rate dimension and establish a coupling relationship between the high refresh rate and redundant voltage drop to support power reduction strategies under high brightness and high refresh rate conditions. Among these, the threshold voltage V of the MOSFET... th It refers to the minimum gate voltage required for a MOSFET to transition from the off state to the on state.

[0047] Meanwhile, the dynamic scaling VSS voltage strategy of related technologies identifies redundant voltage drops based on full-screen high grayscale (as shown in Figure 5, the data stream of full-screen high grayscale display is all Gray 255), while the display scenario of the terminal is usually a mixture of high grayscale and low grayscale (as shown in Figure 5, the data stream of common display scenarios includes different Gray values). The low grayscale VSS voltage... ds Assuming the pinch-off point is lower (compared to higher grayscale), the redundancy of VSS scaling increases with the proportion of lower grayscale in different display scenarios. Therefore, current dynamic scaling strategies urgently need to consider different display areas (higher grayscale proportion) and establish a coupling relationship between display area and redundant voltage drop to support power reduction strategies in more scenarios.

[0048] Furthermore, the dynamic scaling VSS voltage strategy of related technologies uses a preset value approach, meaning all products use the same set of fixed parameters. Due to process fluctuations in OLED manufacturing, there will be differences between individual products, and these differences are greater as the process fluctuations become more pronounced. A uniform preset parameter can lead to yield losses or power consumption losses for some products. Therefore, there is an urgent need to propose a VSS voltage scaling strategy for individual products under different display areas, enabling each screen to find the optimal solution that balances its own power consumption and high brightness uniformity, thereby avoiding a series of drawbacks caused by the preset value approach.

[0049] As mentioned above, how to reduce power consumption while maintaining high brightness uniformity when scaling the driving voltage has become an important research problem.

[0050] (1) The principle of dynamic scaling of VSS voltage for coupled display area.

[0051] When the voltage difference between the anode power supply voltage (VDD) and the cathode power supply voltage (VSS) of the OLED is sufficiently large, the driving TFT has a sufficiently large source-drain voltage to operate in the saturation region. As shown in Figure 6, V ds Setting value and V ds The difference region between the pinch points, I ds The results are essentially the same. Therefore, the cathode power supply voltage (VSS) can be scaled within a certain range to reduce OLED driving power consumption, while ensuring that the operating areas of the R / G / B type devices remain in the saturation region. After scaling the VSS, there will be no visually noticeable change in the display effect (color coordinates and brightness) compared to the original settings.

[0052] (2) The principle of dynamic scaling of VSS voltage coupled with high refresh rate (temperature change).

[0053] The power consumption of the driver IC and the screen temperature of OLED at high refresh rates are both increased to a certain extent compared to conventional refresh rates. As shown in Figures 3 and 4, taking a refresh rate of 144Hz and 18 Pulses as an example, the screen temperature at a brightness of 1200 nits is 6-8℃ higher than that at the standard frequency (120Hz & 3 Pulses). As shown in Figure 7, the I²C of a high refresh rate, high grayscale display area corresponds to... ds -V ds The curve is higher than the I corresponding to the high grayscale display area of ​​the conventional refresh rate. ds -V ds The curve. The specific reason is that as the temperature increases, the carrier concentration driving the TFT increases, reducing the voltage required to form the conductive channel, i.e., the threshold voltage V. th Positive and negative, V ds The pinch point shifts to the left, that is, at a lower V. dsThe value can reach the saturation region. At the same time, the increase in temperature also leads to an increase in the drain-source current I driving the TFT. ds The increase means that the overall current level in the saturation region shifts upward. Therefore, the redundant voltage drop at high refresh rates is greater than at conventional refresh rates, providing a larger VSS scaling margin for high-brightness, high-refresh-rate applications.

[0054] (3) Establishment of criteria for finding the balance point by dynamic scaling of VSS voltage.

[0055] OLED device driving operating voltage V op This is determined by the material properties, device structure, and light-emitting mechanism. Among these, the driving operating voltage V... op This refers to the driving voltage required for an OLED device to emit light normally. Figure 8 shows the OLED display in an embodiment of this disclosure. ds -V ds Curve and operating curves of different devices V op Schematic diagram. Figure 8 shows the typical driving voltages for OLED devices with R, G, and B devices. From this, we can derive the driving voltages required to ensure I... ds The stability of the source-drain current requires ensuring V op Voltage minimum (i.e., as V) ds OLED devices that enter the linear operating region earliest (with voltage reduction) operate in the saturation region. The current changes in R, G, and B OLED devices result in the most direct changes in color coordinates (CIE standard) and brightness. Therefore, by establishing V... ds By mapping the source-drain voltage to chromaticity and luminance, we can find the inflection point of the chromaticity / luminance change, with the earliest inflection point (earliest change refers to V) being the key. ds The point with the largest source-drain voltage difference can be used as the equilibrium point to determine the VSS voltage scaling range. It should also be noted that the VSS voltage scaling range is limited by low grayscale values. ds The pinch-off point is lower than the V of the high grayscale. ds The breakpoint, therefore, the smaller the proportion of high grayscale display area, the more V... ds The higher the redundancy voltage drop, the more power consumption can be reduced while ensuring image quality.

[0056] In the Auto Gamma process of related technologies, the optical measurement unit collects data from the central area of ​​the screen. As shown in Figure 9, due to the longitudinal RC Loading difference in the OLED Panel of related technologies, the VSS voltage in the central area of ​​the screen differs from the VSS voltage on the far IC side or near IC side. Moreover, the VSS voltage on the far IC side is generally greater than that in the central area. Therefore, in order to ensure that the OLED device on the far IC side operates in the saturation region, a fixed compensation voltage needs to be added at the equilibrium point obtained by scanning.

[0057] Based on the above description, as shown in Figure 10, this disclosure proposes a mapping relationship generation method, the method comprising:

[0058] Step 101: Determine the first refresh rate parameter and the first display area parameter of the screen displayed in the display device.

[0059] Step 102: Adjust the driving voltage of the display device according to the preset voltage gradient, and determine the first target display parameter difference that satisfies the preset display parameter condition for one or more display parameter differences under adjacent driving voltages.

[0060] Step 103: Determine the first target driving voltage under the first refresh rate parameter and the first display area parameter based on the difference between the first target display parameters.

[0061] Step 104: Generate the mapping relationship between the first refresh rate parameter, the first display area parameter, and the first target driving voltage.

[0062] For example, the first refresh rate parameter is 120Hz, the first display area parameter is 75%, and the initial driving voltage of the display device is VSS0. The display area parameter can refer to the proportion of high grayscale pixels to the total number of pixels in the displayed image. Optionally, high grayscale pixels can refer to pixels with a grayscale value greater than 127.

[0063] The initial driving voltage VSS0 and the adjacent driving voltage VSS0-V are obtained through the optical measurement unit. Step The display parameters are specified below, where there are one or more display parameters, such as: color coordinate value parameter CIE(x, y) and brightness value parameter (Lv). The initial drive voltage VSS0 and the adjacent drive voltage VSS0-V... Step The display parameters are processed to obtain the display parameter difference, and it is determined whether the display parameter difference meets the preset display parameter conditions.

[0064] When the display parameter difference meets the preset display parameter conditions, the display parameter difference is taken as the first target display parameter difference, and the initial driving voltage VSS0 corresponding to the first target display parameter difference is compared with the adjacent driving voltage VSS0-V. Step The first target driving voltage is determined, and a mapping relationship VSS(120Hz, 75%) is generated between the first refresh rate parameter 120Hz, the first display area parameter 75%, and the first target driving voltage.

[0065] When the displayed parameter difference does not meet the preset displayed parameter conditions, the preset voltage gradient V is applied. StepAdjust the driving voltage of the display device until the difference between one or more display parameters of the display device under adjacent driving voltages meets the first target display parameter difference value of the preset display parameter condition. For example, adjust the driving voltage of the display device from the initial driving voltage VSS0 to VSS0-V Step Then the adjacent driving voltage changes from VSS0 to V Step Adjust to VSS0-2V Step .

[0066] When the difference between one or more display parameters under adjacent driving voltages meets preset display parameter conditions, the first target driving voltage under the first refresh rate parameter and the first display area parameter is determined based on the first target display parameter difference that meets the preset display parameter conditions. In this way, the determined first target driving voltage can ensure high brightness uniformity of the display and reduce the display power consumption of the OLED. High brightness uniformity refers to the objective value representation of the uniformity of color coordinate values ​​and brightness values ​​across the entire screen. Ensuring high brightness uniformity means ensuring the uniformity of color coordinate values ​​and brightness values ​​across the entire screen.

[0067] As can be seen, the processes in steps 102 and 103 are equivalent to gradually adjusting the driving voltage of the display device according to a preset voltage gradient, and obtaining the changes in the display parameters of the display device under different driving voltage values ​​as the driving voltage is gradually adjusted, thereby determining the first target driving voltage (the voltage value of the driving voltage that makes the display device meet the display performance conditions). The process in step 104 is equivalent to generating a mapping relationship between the first refresh rate parameter, the first display area parameter, and the first target driving voltage, so that the display device can determine the driving voltage value corresponding to the used refresh rate and display area parameters that meets the display performance conditions of the display device through the mapping relationship. Here, the driving voltage includes the cathode power supply voltage (VSS) of the light-emitting element in the pixel of the display device, while the display performance conditions are, for example, comprehensive performance conditions that consider factors such as color coordinates, brightness value, and power consumption of the display device (e.g., having relatively small or minimum power consumption under the premise of meeting specified display performance indicators). Therefore, the above mapping relationship generation method can be used by the display device to improve its own display performance.

[0068] Through the above embodiments, a first refresh rate parameter and a first display area parameter of the displayed image in the display device are determined. The driving voltage of the display device is adjusted according to a preset voltage gradient, and a first target display parameter difference is determined where the difference between one or more display parameters under adjacent driving voltages satisfies a preset display parameter condition. Based on the first target display parameter difference, a first target driving voltage under the first refresh rate parameter and the first display area parameter is determined, making the determined first target driving voltage more accurate and reducing power consumption while ensuring high brightness uniformity. A mapping relationship between the first refresh rate parameter, the first display area parameter, and the first target driving voltage is generated. By constructing the mapping relationship, it is convenient to determine the target driving voltage corresponding to the target refresh rate and target display area parameters by calling the mapping relationship, without manual writing, and the target driving voltage can be determined efficiently.

[0069] In some embodiments, the display parameter difference includes: color coordinate difference and brightness difference;

[0070] Step 102 includes:

[0071] Step 1021: Determine the initial drive voltage.

[0072] Step 1022: Determine the first driving voltage based on the initial driving voltage and the preset voltage gradient.

[0073] In practice, the first driving voltage is obtained by subtracting the initial driving voltage from the preset voltage gradient. For example, if the initial driving voltage is VSS0 and the preset voltage gradient is V... Step Then the first driving voltage is VSS0 - V Step .

[0074] Alternatively, the first driving voltage can be obtained by summing the initial driving voltage and the preset voltage gradient. For example, if the initial driving voltage is VSS0 and the preset voltage gradient is V... Step Then the first driving voltage is VSS0+V Step .

[0075] Step 1023: In response to determining that the color coordinate difference and the brightness difference of the initial driving voltage and the first driving voltage are both less than a preset difference threshold, the smaller of the initial driving voltage and the first driving voltage is reduced according to the preset voltage gradient to obtain a second driving voltage.

[0076] It should be noted that the second driving voltage here is the voltage value that the driving voltage needs to be adjusted to in the next step after the first driving voltage during the gradual adjustment process of the driving voltage.

[0077] In practice, the preset difference threshold is the critical point where the color coordinate difference and luminance difference reach an inflection point. When the color coordinate difference and luminance difference of the initial driving voltage and the first driving voltage are both less than the preset difference threshold, it means that the color coordinate difference (the magnitude of color coordinate value change) and luminance difference (the magnitude of luminance value change) between the initial driving voltage and the first driving voltage have not reached an inflection point, that is, the color coordinate values ​​and luminance values ​​between the initial driving voltage and the first driving voltage have not changed exponentially. In this scenario, the smaller of the initial driving voltage and the first driving voltage is reduced according to a preset voltage gradient to obtain the second driving voltage.

[0078] For example, the initial driving voltage is VSS0, and the first driving voltage is VSS0 - V Step When the color coordinate difference and brightness difference between the initial driving voltage and the first driving voltage are both less than a preset difference threshold, the second driving voltage is VSS0-2V. Step .

[0079] Alternatively, in step 1024, in response to determining that the color coordinate difference and the luminance difference of the initial driving voltage and the first driving voltage are both greater than a preset difference threshold, the larger of the initial driving voltage and the first driving voltage is increased according to the preset voltage gradient to obtain a second driving voltage.

[0080] In specific implementation, when the chromaticity difference and luminance difference between the initial driving voltage and the first driving voltage are both greater than a preset difference threshold, it indicates that both the chromaticity difference (the magnitude of change in chromaticity values) and luminance difference (the magnitude of change in luminance values) between the initial driving voltage and the first driving voltage have reached an inflection point, meaning that the chromaticity values ​​and luminance values ​​between the initial driving voltage and the first driving voltage change exponentially. In this scenario, the larger of the initial driving voltage and the first driving voltage is increased according to a preset voltage gradient to obtain the second driving voltage.

[0081] For example, the initial driving voltage is VSS0, and the first driving voltage is VSS0 - V Step When the color coordinate difference and brightness difference between the initial driving voltage and the first driving voltage are both greater than a preset difference threshold, the second driving voltage is VSS0+V. Step .

[0082] By using the above scheme, based on the comparison results of the color coordinate difference and brightness difference between the initial driving voltage and the first driving voltage with the preset difference threshold, the initial driving voltage and the first driving voltage are adjusted in different ways under different scenarios to obtain the second initial driving voltage, thereby enabling more accurate adjustment of the driving voltage.

[0083] In some embodiments, after step 1023, step 102 includes: step 1023A, in response to determining that either the color coordinate difference or the brightness difference corresponding to the first target display parameter difference is greater than a preset difference threshold, the first target display parameter difference is determined as a first target display parameter difference that satisfies the preset display parameter conditions.

[0084] In specific implementation, when neither the chromaticity value change amplitude nor the luminance value change amplitude of the initial driving voltage and the first driving voltage has reached an inflection point, the smaller of the initial driving voltage and the first driving voltage is reduced according to a preset voltage gradient to obtain the second driving voltage. It is then determined whether the chromaticity value difference and luminance value difference between the second driving voltage and the adjacent driving voltage are greater than a preset difference threshold. If either the chromaticity value difference or the luminance value difference between the second driving voltage and the adjacent driving voltage is greater than the preset difference threshold, it indicates that either the chromaticity value change amplitude or the luminance value change amplitude has reached an inflection point. The first target display parameter difference is then determined as the first target display parameter difference that satisfies the preset display parameter conditions.

[0085] For example, after adjusting the driving voltage of the display device, the second driving voltage is VSS0-2V. Step The adjacent driving voltage is VSS0-V Step If either the color coordinate difference or the brightness difference exceeds a preset difference threshold, then the color coordinate difference and brightness difference under the second driving voltage and the adjacent driving voltage are determined as the first target display parameter difference that satisfies the preset display parameter conditions.

[0086] Alternatively, after step 1024, step 102 includes: step 1024A, in response to determining that either the color coordinate difference or the brightness difference corresponding to the first target display parameter difference is less than a preset difference threshold, the first target display parameter difference is determined as a first target display parameter difference that satisfies the preset display parameter conditions.

[0087] In specific implementation, when the color coordinate value change amplitude and brightness value change amplitude of both the initial driving voltage and the first driving voltage reach an inflection point, the larger of the initial driving voltage and the first driving voltage is increased according to a preset voltage gradient to obtain the second driving voltage. It is then determined whether the color coordinate difference and brightness difference between the second driving voltage and the adjacent driving voltage are less than a preset difference threshold. If either the color coordinate difference or brightness difference between the second driving voltage and the adjacent driving voltage is less than the preset difference threshold, it indicates that either the color coordinate value change amplitude or the brightness value change amplitude has deviated from an inflection point, and the first target display parameter difference is determined as the first target display parameter difference that satisfies the preset display parameter conditions.

[0088] For example, after adjusting the driving voltage of the display device, the second driving voltage is VSS0+VStep The adjacent driving voltage is VSS0. When either the color coordinate difference or the brightness difference is less than a preset difference threshold, the color coordinate difference and brightness difference under the second driving voltage and the adjacent driving voltage are determined as the first target display parameter difference that satisfies the preset display parameter conditions.

[0089] By using the above scheme, based on the comparison results of the color coordinate difference and brightness difference between the initial driving voltage and the first driving voltage with the preset difference threshold, the first target display parameter difference is determined according to different standards in different scenarios, thereby enabling more accurate determination of the first target display parameter difference that meets the preset display parameter conditions.

[0090] In some embodiments, after step 1023A, step 103 includes: step 1031, determining the larger of the two driving voltages corresponding to the difference in the first target display parameters as the first target driving voltage.

[0091] In practice, when the changes in both the color coordinate parameter CIE(x, y) and the luminance parameter (Lv) have not reached an inflection point, the preset voltage gradient V is applied. Step Reduce the driving voltage and compare the changes in the color coordinate parameter CIE(x, y) and brightness parameter (Lv) of the reduced second driving voltage with those of the adjacent driving voltage, until the change in either the color coordinate parameter CIE(x, y) or the brightness parameter (Lv) first reaches an inflection point. The driving voltage preceding the second driving voltage that reaches the inflection point is taken as the first target driving voltage corresponding to the first refresh rate parameter and the first display area parameter. The first target driving voltage is the optimal driving voltage that achieves both power consumption and high brightness uniformity under the first refresh rate parameter and the first display area parameter.

[0092] Alternatively, after step 1024A, step 103 includes: step 1032, determining the larger of the two driving voltages corresponding to the difference in the first target display parameters as the first target driving voltage.

[0093] In practice, when the changes in both the color coordinate parameter CIE(x, y) and the luminance parameter (Lv) reach an inflection point, the preset voltage gradient V is applied. StepIncrease the driving voltage and compare the changes in the color coordinate parameter CIE(x, y) and brightness parameter (Lv) of the increased second driving voltage with those of the adjacent driving voltage, until the change in either the color coordinate parameter CIE(x, y) or the brightness parameter (Lv) first deviates from the inflection point. The first second driving voltage that deviates from the inflection point is taken as the first target driving voltage corresponding to the first refresh rate parameter and the first display area parameter. The first target driving voltage is the optimal driving voltage that achieves both power consumption and high brightness uniformity under the first refresh rate parameter and the first display area parameter.

[0094] By using the above scheme, the first target driving voltage is determined in different ways under different scenarios based on the comparison results of the color coordinate difference and brightness difference between the initial driving voltage and the first driving voltage and the preset difference threshold, so that the determined first target driving voltage is more accurate.

[0095] In some embodiments, prior to step 104, the method further includes:

[0096] Step 1041: Retrieve the compensation voltage corresponding to one or more pixel units located away from the center of the display device.

[0097] Step 1042: Obtain the compensated first target driving voltage based on the first target driving voltage and the compensation voltage.

[0098] In specific implementation, considering remote IC-side RC Loading, after determining the first target driving voltage corresponding to the first refresh rate parameter and the first display area parameter, the first target driving voltage and the compensation voltage are summed to obtain the compensated first target driving voltage. Step 104 includes: generating the mapping relationship between the first refresh rate parameter, the first display area parameter, and the compensated first target driving voltage.

[0099] The compensation voltage is determined empirically. In addition, a first optimal driving voltage at the center of the display device and a second optimal driving voltage at the far side of the IC are obtained; the difference between the first and second optimal driving voltages is processed to obtain the compensation voltage.

[0100] The above scheme, based on the first target driving voltage and the compensation voltage, makes the compensated first target driving voltage take into account the influence of the load on the far IC side, thereby making the generated mapping relationship more accurate.

[0101] In some embodiments, the method further includes:

[0102] Step 1051: Determine the second display area parameter of the image displayed in the display device.

[0103] Step 1052: Adjust the driving voltage of the display device according to the preset voltage gradient, and determine a second target display parameter difference that satisfies the preset display parameter condition for one or more display parameter differences of the display device under adjacent driving voltages.

[0104] Step 1053: Determine the second target driving voltage under the first refresh rate parameter and the second display area parameter based on the difference between the second target display parameters.

[0105] Step 1054: Generate the mapping relationship between the first refresh rate parameter, the second display area parameter, and the second target driving voltage.

[0106] For example, the first refresh rate parameter is 120Hz, and the first display area parameter is 75%. After determining the mapping relationship VSS(120Hz, 75%) between the first refresh rate parameter 120Hz, the first display area parameter 75%, and the first target driving voltage, the second display area parameter of the screen displayed in the display device is determined to be 45%. The driving voltage of the display device is adjusted according to a preset voltage gradient, and the step of determining the mapping relationship is repeated to obtain the mapping relationship VSS(120Hz, 45%) between the first refresh rate parameter 120Hz, the second display area parameter 45%, and the second target driving voltage.

[0107] By using the above scheme, by determining the second display area parameter of the screen displayed in the display device and repeating the steps of determining the mapping relationship, the target driving voltage corresponding to different display area parameters can be obtained.

[0108] In some embodiments, the method further includes:

[0109] Step 1061: Determine the second refresh rate parameter of the screen displayed on the display device.

[0110] Step 1062: Adjust the driving voltage of the display device according to the preset voltage gradient, and determine a third target display parameter difference where the difference between one or more display parameters of the display device under adjacent driving voltages satisfies the preset display parameter conditions.

[0111] Step 1063: Determine the third target driving voltage under the second refresh rate parameter and the first display area parameter based on the difference in the third target display parameters.

[0112] Step 1064: Generate the mapping relationship between the second refresh rate parameter, the first display area parameter, and the third target driving voltage.

[0113] For example, the first refresh rate parameter is 120Hz, and the first display area parameter is 75%. After determining the mapping relationship VSS(120Hz, 75%) between the first refresh rate parameter 120Hz, the first display area parameter 75%, and the first target driving voltage, the second refresh rate parameter of the screen displayed in the display device is determined to be 144Hz. The driving voltage of the display device is adjusted according to a preset voltage gradient, and the step of determining the mapping relationship is repeated to obtain the mapping relationship VSS(144Hz, 75%) between the second refresh rate parameter 144Hz, the first display area parameter 75%, and the third target driving voltage.

[0114] By using the above scheme, by determining the second refresh rate parameter of the displayed image in the display device and repeating the steps of determining the mapping relationship, the target driving voltage corresponding to different refresh rate parameters can be obtained.

[0115] In some embodiments, the method further includes:

[0116] Step 1071: Obtain the display brightness of the screen displayed on the display device.

[0117] Step 1072: Retrieve the calibration value corresponding to the display brightness and store the calibration value.

[0118] In specific implementation, after obtaining the first target driving voltage VSS(n, α) of the product Band(n), the gamma calibration value under Band(n) is adjusted based on the first target driving voltage VSS(n, 100%) corresponding to the first display area α being 100%, and the adjusted gamma calibration value is saved.

[0119] Figure 11 is a schematic diagram illustrating the correspondence between the first target driving voltage and the calibration value corresponding to the display brightness in an embodiment of this disclosure. As shown in Figure 11, at target brightness 1, the calibration value Gamma Band (1) includes a Gamma Band (1,1) with a refresh rate parameter of 120Hz and a Gamma Band (1,2) with a refresh rate parameter of 144Hz. Gamma Band (1,1) includes a 3-pulse Gamma Band (1,1,1) and an 18-pulse Gamma Band (1,1,2). Similarly, at target brightness n, the correspondence between the calibration value Gamma Band (n) and the target brightness is not described in detail here.

[0120] The above method determines the calibration value corresponding to the display brightness and stores the calibration value, which is convenient for subsequent retrieval of the calibration value corresponding to the current brightness of the current screen of the display device, and calibrates the target driving voltage based on the calibration value.

[0121] The mapping relationship generation method in this embodiment is applied to a mapping relationship generation system. The mapping relationship generation system can be an automatic gamma correction device. Figure 12 is a schematic diagram of the structure of the mapping relationship generation system according to an embodiment of this disclosure. As shown in Figure 12, the core hardware units of the mapping relationship generation system include: a display driver unit (image generator), an optical measurement unit (optical testing system), a software driver, and an OLED module. The display driver unit provides driving signals to drive the product and is implemented based on a Field Programmable Gate Array (FPGA) and a Personal Computer (PC).

[0122] Figure 13 is a schematic diagram of the mapping relationship generation method according to an embodiment of this disclosure. As shown in Figure 13, after the display device is powered on, the display driving unit loads the initial Band(n) (different brightness, different refresh rates, different Pulse counts) and the image with a high grayscale display area of ​​α according to the settings in the software. After the product is lit, under the current initial driving voltage VSS(n, α), the target brightness and target color coordinates of the high grayscale display area of ​​Gray 255 are adjusted by gamma tuning. Here, Band(n) can be Band(n, β, γ), where n refers to brightness, β refers to refresh rate, and γ refers to Pulse count. The initial driving voltage VSS(n, α) and the adjacent driving voltage VSS(n, α) - V are obtained through the optical measurement unit. Step The display parameters are as follows.

[0123] The initial driving voltage VSS(n, α) is compared with the adjacent driving voltage VSS(n, α) - V Step The two sets of color coordinate parameters CIE(x, y) and luminance parameters (Lv) are compared to determine whether the change range of both the color coordinate parameters CIE(x, y) and luminance parameters (Lv) exceeds the preset difference threshold.

[0124] When the changes in both the color coordinate parameter CIE(x, y) and the luminance parameter (Lv) exceed a preset difference threshold, the initial driving voltage is increased according to a preset voltage gradient. It is then determined whether the changes in the increased driving voltage and the changes in the two sets of color coordinate parameters CIE(x, y) and luminance parameters (Lv) under adjacent driving voltages exceed the preset difference threshold. If the changes in either the increased driving voltage or the changes in the two sets of color coordinate parameters CIE(x, y) and luminance parameters (Lv) under adjacent driving voltages are less than the preset difference threshold, Band(n) and the optimal driving voltage VSS(n, α) for a high grayscale display area of ​​α are obtained.

[0125] When the changes in both the color coordinate parameter CIE(x, y) and the luminance parameter (Lv) do not exceed a preset difference threshold, the initial driving voltage is reduced according to a preset voltage gradient. It is then determined whether the changes in the reduced driving voltage and the changes in the two sets of color coordinate parameters CIE(x, y) and luminance parameters (Lv) under adjacent driving voltages exceed the preset difference threshold. If the changes in either the reduced driving voltage or the changes in the two sets of color coordinate parameters CIE(x, y) and luminance parameters (Lv) under adjacent driving voltages exceed the preset difference threshold, Band(n) and the optimal driving voltage VSS(n, α) for a high grayscale display area of ​​α are obtained.

[0126] Considering compensation at the far IC side, the optimal driving voltage after compensation is VSS(n, α)' = VSS(n, α) + offset. Where offset is the compensation voltage.

[0127] Determine whether the proportion of all high grayscale display areas α in Band(n) has been adjusted. If the proportion of high grayscale display areas α has not been adjusted, obtain the optimal driving voltage corresponding to different proportions of high grayscale display areas α by adjusting different proportions of high grayscale display areas α.

[0128] Determine whether Band(n) has been properly debugged. If Band(n) has not been properly debugged, adjust different Band(n) to obtain the optimal driving voltage corresponding to different Band(n).

[0129] Under VSS(n, 100%), adjust all Band Gamma calibration values ​​and maintain the gamma values. Save the mapping relationship between VSS(n, α) and Band(n) (different Pulse numbers γ, refresh rate β, brightness n) as well as the high grayscale display ratio α, Pulse number, and refresh rate. Power off the display device, and the VSS voltage dynamic scaling process coupling high refresh rate and display area ends.

[0130] It's important to note that high refresh rate and Pulse count were only collected as variables in the high-brightness band (>1000 nits), as the temperature changes caused by high refresh rate and high Pulse count in the low-brightness range (<1000 nits) are minimal. V in high-brightness scenes with high refresh rates... ds Redundant voltage drop has a wider range of scaling options.

[0131] Figure 14 is a schematic diagram of the mapping relationship in an embodiment of this disclosure. As shown in Figure 14, the mapping relationship includes the Band Gamma(n) calibration value corresponding to different target brightness, and also includes the mapping relationship between refresh rate (β), Pulse number (γ), high grayscale ratio display area (α) and optimal driving voltage VSS(n, β, γ, α).

[0132] As shown in Figure 14, for a target brightness Lv1 (>1000 nits), the Band Gamma(n) calibration value is Band(1). When the refresh rate β is 120Hz, the Pulse number γ is 3, and the high grayscale ratio display area α is 100%, the optimal driving voltage VSS(1, 120Hz, 3Pulse, 100%) is -4.5V. Similarly, the optimal driving voltage VSS(1, 120Hz, 3Pulse, 75%) is -4.2V. As shown in the dashed box in Figure 14, due to the small temperature difference at high refresh rates, no differentiated settings are needed at low brightness.

[0133] In some embodiments, the display device includes a plurality of light-emitting units (e.g., OLED) arranged in an array, wherein a first electrode (e.g., cathode) of the light-emitting unit receives the driving voltage (e.g., VSS).

[0134] For example, FIG15 is a schematic diagram of a pixel driving circuit according to an embodiment of the present disclosure. As shown in FIG15, in the 7T1C pixel driving circuit, T1 is a reset transistor, T2 is a compensation transistor, T3 is a driving transistor, T4 is a data writing transistor, T5 and T6 are light-emitting control transistors, and T7 is an anode reset transistor.

[0135] The specific process of controlling the OLED light-emitting unit is as follows: During the initialization phase, the reset transistor T1 is turned on, and the reference signal V received by the source of the reset transistor T1 is transmitted through the transistor. init and the reset signal V received by the gate Reset The gate of the driving transistor T3 is reset. During the compensation phase, the compensation transistor T2, the driving transistor T3, and the data writing transistor T4 are turned on, and the data voltage V received at the source of the data writing transistor T4 is transferred. Data Write to the gate of driving transistor T3. At this time, the gate voltage of driving transistor T3 is V. Data +V th Simultaneously, the anode reset transistor T7 is turned on, initializing the drain of the driving transistor T3. During the light-emitting phase, the light-emitting control transistors T5 and T6 are turned on, based on the power supply voltage V received by the light-emitting control transistor T5. DD The gate voltage V of the compensated driving transistor T3 Data +V th Write to the drain of the driving transistor T3.

[0136] When driving transistor T3 is working, it is necessary to control the source-drain voltage V of driving transistor T3. ds Operating in the linear region allows for more stable light emission from the light-emitting device. Furthermore, by adjusting the driving voltage VSS, the source-drain voltage V of the driving transistor T3 can be controlled.ds Adjustments were made.

[0137] Through the above embodiments, the mapping relationship generation method proposed in this disclosure realizes the construction of a mapping relationship between refresh rate parameters, high grayscale display area parameters, and target driving voltage for each screen during the display module production process. This ensures high brightness uniformity while reducing the display power consumption of OLED. Furthermore, by programming the above mapping relationship into the display module driver IC, the ease of display device invocation is ensured.

[0138] Based on the same inventive concept, corresponding to the methods of any of the above embodiments, as shown in FIG16, another embodiment of this disclosure proposes a voltage control method for a display device, the method comprising:

[0139] Step 201: Obtain the target refresh rate of the current screen of the display device.

[0140] Step 202: Obtain the target display area parameters of the current screen of the display device.

[0141] Step 203: Retrieve the mapping relationship obtained using the mapping relationship generation method described in the above embodiments.

[0142] Step 204: Based on the mapping relationship, determine the target driving voltage corresponding to the target refresh rate and the target display area parameters, and control the voltage regulator of the display device to output the target driving voltage.

[0143] In practical implementation, after the VSS voltage of a product is dynamically scaled and adjusted, the optimal driving voltage VSS(n, β, γ, α) for each band and the calibration value (Band Gamma) corresponding to the current display brightness are written together into the register of the driver IC. The relevant register structure in the driver IC is shown in Figure 17. Compared with the VSS register in related technologies, the register structure in this embodiment adds the following to each band: 1) a storage location associated with the proportion of high grayscale display area α; 2) a storage location associated with the refresh rate β; and 3) a storage location associated with the Pulse number γ. Note that because the temperature change caused by the high refresh rate and high Pulse number in the low brightness range (<1000 nits) is not significant, it is not necessary to set VSS. ds Differentiation, V in high-brightness scenes and high refresh rates ds Redundant voltage drop has a wider range of scaling options.

[0144] As shown in Figure 17, for high brightness values ​​(Lv > 1000 nit), the register stores the mapping relationship between different refresh rate parameters β, different display areas α, and the optimal driving voltage VSS. For example, in Band (1), the mapping relationship is VSS(1, β, γ, α). For low brightness values ​​(Lv < 1000 nit), the register stores the mapping relationship between different display areas α and the optimal driving voltage VSS. For example, in Band (3), the mapping relationship is VSS(3, α).

[0145] After receiving the VSS(n, β, γ, α) adjustment information from the host, the command receiving module of the display module driver IC converts it into the VSS(n, β, γ, α) parameters to be invoked. The driver IC queries the VSS(n, β, γ, α) storage module to find the VSS(n, β, γ, α) parameters for the target refresh rate β, target Pulse count γ, and target display area α under the corresponding band, and sends them to the DC-DC power control VSS regulator module.

[0146] The DC-DC power supply control VSS regulator module outputs the target drive voltage VSS(n, β, γ, α) on the display screen based on the received VSS(n, β, γ, α) parameters. A DC-DC power supply is a DC-DC converter that transforms DC voltage into another DC voltage.

[0147] Through the above embodiments, when the module product is in application, because the driver IC already stores the VSS(n, β, γ, α) information, the terminal corresponding to the display device only needs to identify the target brightness, target refresh rate, target Pulse count, and target display area parameters corresponding to different application scenarios. The terminal does not need to send additional parameters to the driver IC; it only needs to send a regular VSS voltage switching command. The driver IC itself can complete the corresponding VSS(n, β, γ, α) parameter retrieval process. In this process, the terminal does not need to adapt the VSS(n, β, γ, α) parameters in advance, increasing the versatility of the display module.

[0148] In some embodiments, as shown in FIG18, the display device includes: a processor and a signal detection module; step 201 includes:

[0149] Step 2011: The processor sends a refresh rate acquisition command to the signal detection module.

[0150] Step 2012: The signal detection module obtains the time interval between the display device and two adjacent display frames corresponding to the current frame.

[0151] Step 2013: The signal detection module determines the target refresh rate based on the time interval and sends the target refresh rate to the processor.

[0152] In practice, the display device's terminal identifies the target refresh rate of the current screen in the following ways: the display device's TE synchronization signal detection module identifies the TE synchronization signal (Tearing Effect signal: synchronized with the display refresh signal) and obtains the target refresh rate by capturing the interval between two adjacent TE signals.

[0153] In addition, the terminal recognition display scene of the display device usually has the following Pulse number: the preset relationship between different Pulse numbers and Gamma Mode is stored in the driver IC, that is, the Pulse number and Gamma Mode are coupled.

[0154] Among them, the brightness adjustment corresponding to the terminal recognition display scenario is usually as follows: As shown in Figure 17, the preset relationship between Gamma Band and brightness adjustment is stored in the driver IC, that is, the brightness adjustment is coupled with Band(n).

[0155] Through the above scheme, the signal detection module can accurately obtain the target refresh rate of the current screen by obtaining the time interval between the display device and the two adjacent display frames corresponding to the current screen.

[0156] In some embodiments, as shown in FIG18, the display device includes: a processor and an image processing module; step 202 includes:

[0157] Step 202A: The processor sends a display area parameter acquisition instruction to the image processing module.

[0158] Step 202B: The image processing module decodes the current image to obtain image information.

[0159] Step 202C: The image processing module performs traversal processing on the image information and reads the grayscale of each pixel unit in the image information.

[0160] Step 202D: The image processing module determines the target display area parameter based on the grayscale of each pixel unit in the image information, and sends the target display area parameter to the processor.

[0161] In practice, the target display area parameters for the terminal of the display device to identify the current screen are usually as follows: When decoding image data, the image processing module of the display device traverses the pixel arrangement to read the gray level of each pixel. By calculating the proportion of high gray levels (for example, defining gray levels above 207 as high gray levels) in all pixels, the target display area parameters can be deduced.

[0162] Through the above scheme, the image processing module traverses and processes the image information, reads the grayscale of each pixel unit in the image information, and can accurately obtain the target display area parameters of the current screen.

[0163] In some embodiments, as shown in FIG18, the display device includes: a processor and a temperature detection module; step 202 includes:

[0164] Step 202a: The processor sends a command to the temperature detection module to obtain the display area parameter.

[0165] Step 202b: The temperature detection module obtains the current temperature when the display device displays the current screen.

[0166] Step 202c: The temperature detection module determines the target display area parameter corresponding to the current temperature based on the pre-stored correspondence between temperature and display area parameters, and sends the target display area parameter to the processor.

[0167] In practice, the target display area parameters for the display device to identify the current screen usually include: the display device's temperature detection module learns the statistical laws of temperature and display area of ​​the display module in advance by a large amount of human learning, and calculates the target display area parameters by detecting the real-time temperature of the screen.

[0168] Using the above method, the temperature detection module can accurately obtain the target display area parameters of the current screen based on the pre-stored correspondence between temperature and display area parameters.

[0169] Through the above embodiments, during the overall calling process, the terminal only needs to send commands to the driver IC to adjust the VSS(n, β, γ, α) parameters, without sending additional parameters, which reduces the workload of the terminal and improves the integration of the display module.

[0170] It should be noted that the method of this embodiment can be executed by a single device, such as a computer or server. The method of this embodiment can also be applied to a distributed scenario, where multiple devices cooperate to complete the task. In such a distributed scenario, one of these devices may execute only one or more steps of the method of this embodiment, and the multiple devices will interact with each other to complete the method described.

[0171] It should be noted that the above description describes some embodiments of this disclosure. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in a different order than that shown in the above embodiments and still achieve the desired result. Furthermore, the processes depicted in the drawings do not necessarily require a specific or sequential order to achieve the desired result. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0172] Based on the same inventive concept, corresponding to any of the above embodiments, this disclosure also provides 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 program, it implements the mapping relationship generation method or the voltage control method of the display device described in any of the above embodiments.

[0173] Figure 19 shows a more specific hardware structure diagram of an electronic device provided in this embodiment. The device may include: a processor 1010, a memory 1020, an input / output interface 1030, a communication interface 1040, and a bus 1050. The processor 1010, memory 1020, input / output interface 1030, and communication interface 1040 are interconnected internally via the bus 1050.

[0174] The processor 1010 can be implemented using a general-purpose CPU (Central Processing Unit), microprocessor, application-specific integrated circuit (ASIC), or one or more integrated circuits, and is used to execute relevant programs to implement the technical solutions provided in the embodiments of this specification.

[0175] The memory 1020 can be implemented in the form of ROM (Read Only Memory), RAM (Random Access Memory), static storage device, dynamic storage device, etc. The memory 1020 can store the operating system and other applications. When the technical solutions provided in the embodiments of this specification are implemented by software or firmware, the relevant program code is stored in the memory 1020 and is called and executed by the processor 1010.

[0176] The input / output interface 1030 is used to connect input / output modules to realize information input and output. Input / output modules can be configured as components within the device (not shown in the figure) or externally connected to the device to provide corresponding functions. Input devices may include keyboards, mice, touchscreens, microphones, various sensors, etc., while output devices may include displays, speakers, vibrators, indicator lights, etc.

[0177] The communication interface 1040 is used to connect a communication module (not shown in the figure) to enable communication between this device and other devices. The communication module can communicate via wired means (such as USB (Universal Serial Bus), network cable, etc.) or wireless means (such as mobile network, WIFI (Wireless Fidelity), Bluetooth, etc.).

[0178] Bus 1050 includes a pathway for transmitting information between various components of the device, such as processor 1010, memory 1020, input / output interface 1030, and communication interface 1040.

[0179] It should be noted that although the above-described device only shows the processor 1010, memory 1020, input / output interface 1030, communication interface 1040, and bus 1050, in specific implementations, the device may also include other components necessary for normal operation. Furthermore, those skilled in the art will understand that the above-described device may only include the components necessary for implementing the embodiments of this specification, and not necessarily all the components shown in the figures.

[0180] The electronic devices described above are used to implement the corresponding mapping relationship generation method or the voltage control method of the display device in any of the foregoing embodiments, and have the beneficial effects of the corresponding method embodiments, which will not be repeated here.

[0181] Based on the same inventive concept, corresponding to the methods of any of the above embodiments, this disclosure also provides a non-transitory computer-readable storage medium storing computer instructions for causing the computer to execute the mapping relationship generation method or the voltage control method of the display device as described in any of the above embodiments.

[0182] The computer-readable medium of this embodiment includes permanent and non-permanent, removable and non-removable media, and information storage can be implemented by any method or technology. Information can be computer-readable instructions, data structures, program modules, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic magnetic disk storage or other magnetic storage devices, or any other non-transfer medium that can be used to store information accessible by a computing device.

[0183] The computer instructions stored in the storage medium of the above embodiments are used to cause the computer to execute the mapping relationship generation method or the voltage control method of the display device as described in any of the above embodiments, and have the beneficial effects of the corresponding method embodiments, which will not be repeated here.

[0184] Based on the same inventive concept, corresponding to the methods of any of the above embodiments, this disclosure also provides a computer program product, including computer program instructions, which, when the computer program instructions are run on a computer, cause the computer to execute the mapping relationship generation method or the voltage control method of the display device as described in any of the above embodiments.

[0185] The computer program instructions of the computer program product in the above embodiments are used to cause the computer to execute the mapping relationship generation method or the voltage control method of the display device as described in any of the above embodiments, and have the beneficial effects of the corresponding method embodiments, which will not be repeated here.

[0186] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of this disclosure (including the claims) is limited to these examples; within the framework of this disclosure, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of the embodiments of this disclosure as described above, which are not provided in detail for the sake of brevity.

[0187] Additionally, to simplify the description and discussion, and to avoid obscuring the embodiments of this disclosure, the provided drawings may or may not show well-known power / ground connections to integrated circuit (IC) chips and other components. Furthermore, the apparatus may be shown in block diagram form to avoid obscuring the embodiments of this disclosure, and this also takes into account the fact that the details of implementation of these block diagram apparatuses are highly dependent on the platform on which the embodiments of this disclosure will be implemented (i.e., these details should be fully understood by those skilled in the art). While specific details (e.g., circuitry) have been set forth to describe exemplary embodiments of this disclosure, it will be apparent to those skilled in the art that the embodiments of this disclosure may be implemented without these specific details or with variations thereof. Therefore, these descriptions should be considered illustrative rather than restrictive.

[0188] Although this disclosure has been described in conjunction with specific embodiments thereof, many substitutions, modifications, and variations of these embodiments will be apparent to those skilled in the art from the foregoing description. For example, other memory architectures (e.g., dynamic RAM (DRAM)) may be used with the embodiments discussed.

[0189] This disclosure is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the scope of protection of this disclosure.

Claims

1. A mapping relationship generation method, characterized by, The method includes: A first refresh rate parameter and a first display area parameter are determined in the display device, wherein the first display area parameter indicates the proportion of the area occupied by the bright area in the display screen; The driving voltage of the display device is gradually adjusted according to a preset voltage gradient, and the changes in display parameters of the display device under different driving voltage values ​​are obtained as the driving voltage is gradually adjusted to determine a first target driving voltage. The first target driving voltage is the voltage value of the driving voltage that makes the display device meet the display performance conditions. The driving voltage includes the cathode power supply voltage of the light-emitting element in the pixel of the display device; and... A mapping relationship is generated between the first refresh rate parameter, the first display area parameter, and the first target driving voltage, so that the display device can determine the driving voltage value that satisfies the display performance conditions of the display device corresponding to the refresh rate and display area parameter used through the mapping relationship.

2. The method according to claim 1, characterized in that, The changes in the display parameters include: color coordinate difference and brightness difference; The stepwise adjustment of the driving voltage of the display device according to a preset voltage gradient includes: Determine the initial drive voltage; The first driving voltage is determined based on the initial driving voltage and the preset voltage gradient; In response to determining that the chromaticity difference and luminance difference between the driving voltage equal to the initial driving voltage and the driving voltage equal to the first driving voltage are both less than a preset difference threshold, the smaller of the initial driving voltage and the first driving voltage is reduced according to the preset voltage gradient to obtain a second driving voltage; In response to determining that the chromaticity difference and luminance difference between the driving voltage equal to the initial driving voltage and the driving voltage equal to the first driving voltage are both greater than a preset difference threshold, the larger of the initial driving voltage and the first driving voltage is increased according to the preset voltage gradient to obtain a second driving voltage; The second driving voltage is the voltage value that the driving voltage needs to be adjusted to in the next step after the first driving voltage.

3. The method of claim 2, wherein, After reducing the smaller of the initial driving voltage and the first driving voltage according to the preset voltage gradient to obtain the second driving voltage, the display performance condition is satisfied when either the color coordinate difference or the brightness difference is greater than a preset difference threshold and the driving voltage is equal to the first driving voltage. After increasing the larger of the initial driving voltage and the first driving voltage according to the preset voltage gradient to obtain the second driving voltage, the display performance condition is satisfied when either the color coordinate difference or the brightness difference is less than a preset difference threshold and the driving voltage is equal to the second driving voltage.

4. The method of claim 1, wherein, The display performance condition is satisfied when the change in the display parameters between the driving voltage equal to the previous step voltage value and the driving voltage equal to the current step voltage value satisfies the display parameter condition, such that the voltage value of the driving voltage for the display device to satisfy the display performance condition is the larger of the previous step voltage value and the current step voltage value.

5. The method according to claim 1, characterized in that, Before generating the mapping relationship between the first refresh rate parameter, the first display area parameter, and the first target driving voltage, the method further includes: Acquire compensation voltages corresponding to one or more pixel units located remotely from the center of the display device; and, The compensated first target driving voltage is obtained based on the first target driving voltage and the compensation voltage.

6. The method according to claim 1, characterized in that, The method further includes: Determine the second display area parameter of the image displayed in the display device; The driving voltage of the display device is gradually adjusted according to the preset voltage gradient, and the change in the display parameters of the display device under different voltage values ​​is obtained as the driving voltage is gradually adjusted, so as to determine the second target driving voltage. The second target driving voltage is the voltage value of the driving voltage that makes the display device meet the display performance conditions under the second display area parameter. Generate a mapping relationship between the first refresh rate parameter, the second display area parameter, and the second target driving voltage.

7. The method according to claim 1, characterized in that, The method further includes: Determine the second refresh rate parameter of the screen displayed on the display device; The driving voltage of the display device is gradually adjusted according to the preset voltage gradient, and the change in the display parameters of the display device under different voltage values ​​is obtained as the driving voltage is gradually adjusted, so as to determine the third target driving voltage. The third target driving voltage is the voltage value of the driving voltage that makes the display device meet the display performance conditions under the second refresh rate parameter. Generate the mapping relationship between the second refresh rate parameter, the first display area parameter, and the third target driving voltage.

8. The method according to claim 1, characterized in that, The method further includes: Obtain the display brightness of the screen displayed on the display device; The brightness calibration value corresponding to the display brightness is determined according to the mapping relationship, so that the display device can meet the display performance conditions by applying the brightness calibration value.

9. The method according to any one of claims 1 to 8, characterized in that, The display device includes a plurality of organic light-emitting diodes arranged in an array, and the driving voltage is the cathode power supply voltage of the plurality of organic light-emitting diodes.

10. A voltage control method for a display device, characterized in that, The method includes: Obtain the target refresh rate of the current screen on the display device; Obtain the target display area parameters of the current screen on the display device; The mapping relationship is obtained by means of any one of claims 1 to 8; Based on the mapping relationship, the target driving voltage corresponding to the target refresh rate and the target display area parameter is determined, and the power supply component of the display device is controlled to provide the target driving voltage.

11. The method according to claim 10, characterized in that, The display device includes: a processor and a signal detection module; The acquisition of the target refresh rate of the current screen of the display device includes: The processor sends a refresh rate acquisition command to the signal detection module; The signal detection module obtains the time interval between the display device and two adjacent display frames corresponding to the current frame; The signal detection module determines the target refresh rate based on the time interval and sends the target refresh rate to the processor.

12. The method according to claim 10, characterized in that, The display device includes: a processor and an image processing module; The acquisition of the target display area parameters of the current screen of the display device includes: The processor sends a display area parameter acquisition instruction to the image processing module; The image processing module decodes the current image to obtain image information; The image processing module iterates through the image information and reads the grayscale of each pixel unit in the image information. The image processing module determines the target display area parameter based on the grayscale of each pixel unit in the image information, and sends the target display area parameter to the processor.

13. The method according to claim 10, characterized in that, The display device includes: a processor and a temperature detection module; The acquisition of the target display area parameters of the current screen of the display device includes: The processor sends a command to the temperature detection module to obtain the display area parameter; The temperature detection module obtains the current temperature when the display device displays the current screen. The temperature detection module determines the target display area parameter corresponding to the current temperature based on the pre-stored correspondence between temperature and display area parameters, and sends the target display area parameter to the processor.

14. An electronic device, characterized in that, It includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the program, implements the method as claimed in any one of claims 1 to 9 or the method as claimed in any one of claims 10 to 13.

15. A non-transitory computer-readable storage medium, characterized in that, The non-transitory computer-readable storage medium stores computer instructions for causing a computer to perform the method according to any one of claims 1 to 9 or the method according to any one of claims 10 to 13.

16. A computer program product comprising computer program instructions, characterized in that, When the computer program instructions are executed on a computer, the computer causes the computer to perform the method as described in any one of claims 1 to 9 or the method as described in any one of claims 10 to 13.

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