Display device

Abstract

The application provides a display device. A processor of the display device is configured to: acquire a backlight current of a display screen and a color temperature related parameter; the color temperature related parameter includes a color coordinate of the display screen; determine a target backlight current of the display screen between an i-th display compensation moment and an i+1-th display compensation moment according to the backlight current of the display screen and a brightness compensation coefficient; determine a target RGB color table required for image display of the display screen between the i-th display compensation moment and the i+1-th display compensation moment according to the color temperature related parameter and a compensation coefficient corresponding to each color temperature related parameter, the target RGB color table including values of RGB three channels corresponding to each gray scale; and perform image display according to the target backlight current and the target RGB color table. The application improves the stability of image display.

Description

Technical Field

[0001] This application relates to display technology. More specifically, it relates to a display device. Background Technology

[0002] As an electronic product, display devices generate heat during operation, causing their temperature to rise. Typically, the temperature of a display device changes significantly over a period of time after it is turned on. Furthermore, the brightness and color temperature of the displayed image are greatly affected by temperature.

[0003] Therefore, existing display devices exhibit noticeable changes in image brightness and color temperature for a period of time after being powered on. In other words, existing display devices suffer from poor image display stability. Summary of the Invention

[0004] An exemplary embodiment of this application provides a display device that can improve the stability of image display.

[0005] In a first aspect, this application provides a display device, comprising:

[0006] A display screen used to display images;

[0007] A processor connected to the display screen is configured to:

[0008] Obtain the backlight current of the display screen at the i-th display compensation time, and the color temperature related parameters; the backlight current of the display screen is positively correlated with the brightness of the display screen, and the color temperature related parameters include: the color coordinates of the display screen; i is an integer greater than or equal to 1;

[0009] Based on the backlight current of the display screen at the i-th display compensation time and the brightness compensation coefficient, determine the target backlight current of the display screen between the i-th display compensation time and the (i+1)-th display compensation time.

[0010] Based on the color temperature related parameters of the display screen at the i-th display compensation time, and the compensation coefficients corresponding to each color temperature related parameter, the target RGB color table required for the display screen to display images between the i-th display compensation time and the (i+1)-th display compensation time is determined. The target RGB color table includes the values ​​of the RGB three channels corresponding to each gray level.

[0011] Between the i-th display compensation time and the (i+1)-th display compensation time, the display screen is controlled to display an image based on the target backlight current and the target RGB color table.

[0012] In some embodiments, the processor is configured to:

[0013] Based on the color temperature related parameters of the display screen at the i-th display compensation time, and the compensation coefficients corresponding to each color temperature related parameter, the compensated color coordinates corresponding to each gray level are obtained.

[0014] Based on the compensated color coordinates corresponding to each gray level, the values ​​of the RGB three channels corresponding to each gray level are obtained.

[0015] In some embodiments, the color temperature related parameters include: the color coordinates of the display screen, and the processor is configured to:

[0016] Based on the color coordinate compensation coefficient of each color coordinate at the i-th display compensation time, obtain the gray level compensation coefficient corresponding to each gray level;

[0017] The compensated color coordinates of each gray level are obtained based on the color coordinates of the display screen at the i-th display compensation time and the gray level compensation coefficients corresponding to each gray level.

[0018] In some embodiments, the processor is configured to:

[0019] For each first gray level in the gray levels, the gray level compensation coefficient corresponding to each first gray level is obtained according to the ratio of the brightness corresponding to the first gray level to the brightness corresponding to the target gray level, and the gray level compensation coefficient corresponding to the target gray level; the gray level compensation coefficient corresponding to the target gray level is the color coordinate compensation coefficient of each color coordinate at the i-th display compensation time.

[0020] Based on the gray level compensation coefficients corresponding to each of the first gray levels, the gray level compensation coefficients corresponding to each gray level in each gray level are obtained.

[0021] In some embodiments, the processor is configured to:

[0022] The target backlight current of the display screen between the i-th and (i+1)-th display compensation times is obtained based on the backlight current of the display screen at the i-th display compensation time and the product of the backlight current and the brightness compensation coefficient.

[0023] In some embodiments, the processor is configured to:

[0024] The type of the image to be displayed is detected to obtain an image type detection result; the image type detection result is used to characterize whether the image to be displayed is a high dynamic range (HDR) image.

[0025] Based on the image type detection result, the duration between the i-th display compensation time and the (i+1)-th display compensation time is determined.

[0026] In some embodiments, the processor is configured to:

[0027] Obtain the duration between the last power-off time and the current power-on time of the display device;

[0028] If it is determined that the duration between the last power-off time and the current power-on time is less than a preset duration, then the corresponding display compensation times for the display device after the current power-on are determined based on the running time of the display device after the last power-on.

[0029] In some embodiments, the maximum value of i is N; N is an integer greater than or equal to 1, and the processor is configured to:

[0030] If the running time of the display device after the last power-on is less than the total compensation time, then each display compensation time corresponding to the display device after the current power-on is determined to correspond to each display compensation time that the display device has not reached after the last power-on; the total compensation time is equal to the time between the last power-on time of the display device and the N+1th display compensation time.

[0031] Secondly, this application provides an image display method, the method comprising:

[0032] Obtain the backlight current of the display screen at the i-th display compensation time, and the color temperature related parameters; the backlight current of the display screen is positively correlated with the brightness of the display screen, and the color temperature related parameters include: the color coordinates of the display screen; i is an integer greater than or equal to 1;

[0033] Based on the backlight current of the display screen at the i-th display compensation time and the brightness compensation coefficient, determine the target backlight current of the display screen between the i-th display compensation time and the (i+1)-th display compensation time.

[0034] Based on the color temperature related parameters of the display screen at the i-th display compensation time, and the compensation coefficients corresponding to each color temperature related parameter, the target RGB color table required for the display screen to display images between the i-th display compensation time and the (i+1)-th display compensation time is determined. The target RGB color table includes the values ​​of the RGB three channels corresponding to each gray level.

[0035] Between the i-th display compensation time and the (i+1)-th display compensation time, the display screen is controlled to display an image based on the target backlight current and the target RGB color table.

[0036] Thirdly, this application provides an image display device, the device comprising:

[0037] The acquisition module is used to acquire the backlight current of the display screen at the i-th display compensation time, and color temperature related parameters; the backlight current of the display screen is positively correlated with the brightness of the display screen, and the color temperature related parameters include: the color coordinates of the display screen; i is an integer greater than or equal to 1;

[0038] The processing module is configured to determine the target backlight current of the display screen between the i-th and i+1-th display compensation times based on the backlight current of the display screen at the i-th display compensation time and the brightness compensation coefficient; and to determine the target RGB color table required for image display between the i-th and i+1-th display compensation times based on the color temperature related parameters of the display screen at the i-th display compensation time and the compensation coefficients corresponding to each color temperature related parameter; wherein the target RGB color table includes the values ​​of the RGB three channels corresponding to each grayscale level;

[0039] The control module is used to control the display screen to display an image based on the target backlight current and the target RGB color table between the i-th display compensation time and the (i+1)-th display compensation time.

[0040] Fourthly, this application provides a display device comprising: a display screen for displaying an image; a processor connected to the display screen, the processor being configured to perform the image display method as described in the second aspect; and the power of the entire display device varying over time during the execution of the image display method by the processor.

[0041] In some embodiments, the power of the entire display device varies with time according to the following formula:

[0042]

[0043] Wherein, P(t) represents the power of the display device at time t when the display device executes the image display method; Pi represents the power of the display device when the display device does not execute the image display method; Cl(t) represents the brightness compensation coefficient at time t.

[0044] Fifthly, this application provides a computer-readable storage medium storing computer-executable instructions that, when executed by a processor, implement the method described in any of the first aspects.

[0045] In a sixth aspect, this application provides a computer program product, including a computer program that, when executed by a control module, implements the method described in any of the first aspects.

[0046] The display device provided in this application determines the target backlight current between the i-th and (i+1)-th display compensation times by using a brightness compensation coefficient and the backlight current of the display at the i-th display compensation time. By controlling the display to display images according to this target backlight current, brightness compensation for image display is achieved. Similarly, by using color temperature-related parameters and their corresponding compensation coefficients, the target RGB color table required for image display is determined. By controlling the display to display images according to this target RGB color table, color temperature compensation for image display is achieved. Through these methods, brightness and color temperature compensation are achieved after the display device is powered on, improving the stability of image display. Attached Figure Description

[0047] To more clearly illustrate the implementation methods in the embodiments of this application 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 some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings.

[0048] Figure 1 A schematic diagram of the structure of a display device provided in this application;

[0049] Figure 2 A flowchart illustrating an image display method provided in this application;

[0050] Figure 3 A graph showing the relationship between backlight current and brightness of a display screen provided in this application;

[0051] Figure 4 A flowchart illustrating a method for determining a target RGB color table provided in this application;

[0052] Figure 5 A flowchart illustrating a method for determining the display compensation time of a display device is provided in this application;

[0053] Figure 6 A flowchart illustrating another image display method provided in this application;

[0054] Figure 7 This is a schematic diagram of the structure of an image display device provided in this application. Detailed Implementation

[0055] To make the objectives, implementation methods and advantages of this application clearer, the exemplary implementation methods of this application will be clearly and completely described below with reference to the accompanying drawings of the exemplary embodiments of this application. Obviously, the described exemplary embodiments are only some embodiments of this application, and not all embodiments.

[0056] It should be noted that the brief descriptions of terms in this application are only for the convenience of understanding the embodiments described below, and are not intended to limit the embodiments of this application. Unless otherwise stated, these terms should be understood in their ordinary and common meaning.

[0057] Furthermore, the terms “including” and “having”, and any variations thereof, are intended to cover but not exclusively include, for example, a product or device that includes a series of components is not necessarily limited to those components that are clearly listed, but may include other components that are not clearly listed or that are inherent to such product or device.

[0058] The following is a brief explanation of some of the terms and concepts used in this application:

[0059] Color coordinates: These are the coordinates of a color. They can also be called color representation. The commonly used color coordinate system (x, y) has the x-axis as the horizontal axis and the y-axis as the vertical axis. Color coordinates can accurately represent colors. Color temperature is calculated using color coordinates.

[0060] Figure 1 This is a schematic diagram of the structure of a display device provided in this application. Figure 1 As shown, in some embodiments, the display device 200 may include a controller 250, a communicator 220, an input / output interface 255, a display screen 275, a memory 260, and other devices.

[0061] For example, the display device 200 may be a smart TV, a smart display panel, a projection display device, a monitor, etc. In some embodiments, the display device 200 provides broadcast television reception functionality and may also be additionally equipped with smart network TV functionality that provides computer support, including but not limited to network TV, smart TV, Internet Protocol Television (IPTV), etc.

[0062] In some embodiments, the controller 250 controls the operation of the display device and responds to user operations through various software control programs stored in memory. The controller 250 can control the overall operation of the display device 200. For example... Figure 1As shown, the controller 250 may include at least one of the following: Random Access Memory 251 (RAM), Read-Only Memory 252 (ROM), other processors, such as a Graphics Processing Unit 253 (GPU), a Central Processing Unit 254 (CPU), a Communication Interface, and a Communication Bus 256. The Communication Bus connects the various components. In some embodiments, RAM 251 is used to store temporary data for the operating system or other running programs. In some embodiments, ROM 252 is used to store various system startup instructions.

[0063] In some embodiments, upon receiving a power-on signal, the display device 200 starts up, the CPU executes the system startup instructions in ROM 252, and copies temporary data of the operating system stored in memory to RAM 251 to facilitate the startup or operation of the operating system. After the operating system has started, the CPU copies temporary data of various applications from memory to RAM 251 to facilitate the startup or operation of various applications.

[0064] In some embodiments, the CPU processor 254 is configured to execute operating system and application instructions stored in memory, and to execute various applications, data, and content based on various interactive instructions received from external input, so as to ultimately display and play various audio and video content.

[0065] In some exemplary embodiments, the CPU processor 254 may include multiple processors. These multiple processors may include a main processor and one or more sub-processors. The main processor is used to perform some operations of the display device 200 in a pre-power-on mode and / or to display a screen in normal mode. The one or more sub-processors are used for one operation in a standby mode or other state. The display formatting module can be used to convert the received frame rate video output signal to a signal that conforms to a display format, such as outputting red, green, and blue (RGB) data signals.

[0066] In some embodiments, the communicator 220 is a component used to communicate with external devices or external servers according to various communication protocol types. For example, the communicator 200 may include at least one of a WIFI module, a Bluetooth module, a wired Ethernet module, or other network communication protocol chips or near-field communication protocol chips, as well as an infrared receiver. In some embodiments, the display device 200 can establish the transmission and reception of control signals and data signals with an external control device or content providing device through the communicator 220.

[0067] In some embodiments, the input / output interface 255 (e.g.) Figure 1 The first to nth interfaces shown can be configured to perform data transmission between the controller 250 and other external devices or other controllers 250. This includes receiving video and audio signal data, or command and instruction data, from external devices.

[0068] In some embodiments, the display screen 275 can be used to receive image signals output from a processor and to display video content, images, and a menu control interface. In some embodiments, the display screen 275 includes a display component for presenting an image and a driving component for driving the image display. Exemplarily, the display screen may include a display panel. The display panel may be a liquid crystal display (LCD), an organic light-emitting diode (OLED), an active-matrix organic light-emitting diode (AMOLED), a flexible light-emitting diode (FLED), a MiniLED, a MicroLED, a Micro-OLED, a quantum dot light-emitting diode (QLED), etc. In some embodiments, the above-described display device may include one or more display screens.

[0069] In some embodiments, the memory 260 may include storing various software modules for driving the display device 200. For example, the various software modules stored in the first memory include at least one of the following: a basic module, a detection module, a communication module, a display control module, a browser module, and various service modules.

[0070] It should be understood that Figure 1 This application merely illustrates, by way of example, the components in the structure of the display device that are relevant to this application, and does not limit whether the display device includes other components.

[0071] Due to the inherent operating characteristics of display devices, their temperature will continuously rise after power-on and as they operate. It takes a period of time for the display to reach a stable temperature. For example, with smart TVs or monitors, the temperature typically stabilizes after 30 minutes of operation. Before the display temperature stabilizes, the rate of temperature fluctuation will be relatively high.

[0072] The inventors discovered through research that the brightness and color temperature of images displayed on a screen are affected by temperature variations in the display device. During periods of unstable temperature changes in the display device, the brightness and color temperature of the displayed image may fluctuate with the temperature of the display device. Therefore, existing displays suffer from poor image display stability.

[0073] Therefore, this application provides a method for compensating for the brightness and color temperature of a display screen to improve the stability of image display. The execution entity of the image display method provided in this application can be the aforementioned display device, or a processor installed in the display device.

[0074] The technical solution of this application will be described in detail below, taking a display device as the executing entity and specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.

[0075] Figure 2 This is a flowchart illustrating an image display method provided in this application. Figure 2 As shown, the method may include the following steps:

[0076] S101. Obtain the backlight current of the display screen at the i-th display compensation time, and the color temperature related parameters.

[0077] Wherein, i is an integer greater than or equal to 1. The display device may pre-store the maximum value of i, as well as the interval between each display compensation moment. In this implementation, the display device can execute the image display method only for a short period after power-on, thereby ensuring the stability of brightness and color temperature during image display. Alternatively, i may not be set to a maximum value. In this implementation, the display device can continuously execute the image display method provided in this application after power-on.

[0078] The backlight current of the aforementioned display screen is positively correlated with its brightness. That is, the higher the backlight current, the brighter the display screen; conversely, the lower the backlight current, the lower the brightness. Optionally, the brightness of the display screen mentioned here may refer to the brightness value corresponding to the geometric center point of the display screen. Optionally, this application does not limit how the display device obtains the backlight current of the display screen at the i-th display compensation moment. For example, the display device may detect the backlight current of the display screen at the i-th display compensation moment using a current detection device.

[0079] The aforementioned color temperature-related parameters may include the color coordinates of the display screen. These color coordinates can be represented as color coordinates (x, y), where x is the horizontal axis value and y is the vertical axis value. Optionally, the color coordinates of the display screen mentioned here may refer to the color coordinates corresponding to the geometric center point of the display screen.

[0080] Optionally, this application does not limit how the display device obtains the color temperature-related parameters of the display screen at the i-th display compensation time. Optionally, the display screen can obtain its color coordinates through a color coordinate detection device. Alternatively, the color temperature-related parameters at each display compensation time can be determined through offline experiments and pre-stored in the display device.

[0081] S102. Based on the backlight current of the display screen at the i-th display compensation time and the brightness compensation coefficient, determine the target backlight current of the display screen between the i-th display compensation time and the (i+1)-th display compensation time.

[0082] The brightness compensation coefficients of the display screen at each display compensation moment can be pre-stored by the user in the display device. These brightness compensation coefficients are used to compensate for the brightness of the image displayed on the display screen.

[0083] Figure 3 This application provides a diagram showing the relationship between backlight current and brightness of a display screen. For example... Figure 3 As shown, the relationship between backlight current and brightness is I = L(t). Where I represents backlight current, L represents brightness, and t represents time. According to... Figure 3 The relationship diagram shown can be used in engineering to determine the backlight current change rate through function fitting, as shown in the following formula (0):

[0084] ΔI=f(ΔL) (0)

[0085] Where ΔI represents the rate of change of backlight current, and ΔL represents the rate of change of brightness. Therefore, the brightness compensation coefficient can be used as the compensation coefficient for the backlight current at the same display compensation moment.

[0086] It should be understood that this application does not limit the duration between the i-th display compensation time and the (i+1)-th display compensation time. For example, the duration between the i-th display compensation time and the (i+1)-th display compensation time can be positively correlated with the value of i. That is, the larger i is, the longer the duration between the i-th display compensation time and the (i+1)-th display compensation time can be, so that when the temperature change rate is large in the early stage of the display device's power-on, the frequency of brightness and color temperature compensation for the display screen is also greater, thereby further improving the stability of image display. In some embodiments, the duration between any two adjacent display compensation times can also be the same.

[0087] S103. Based on the color temperature related parameters of the display screen at the i-th display compensation time and the compensation coefficients corresponding to each color temperature related parameter, determine the target RGB color table required for the display screen to display images between the i-th display compensation time and the (i+1)-th display compensation time.

[0088] The aforementioned target RGB color table includes the values ​​of the RGB three channels corresponding to each grayscale level. It should be understood that this application does not limit the number of grayscale levels that the display screen of the display device can correspond to. For example, an 8-bit display screen can correspond to 256 grayscale levels from 0 to 255. For a 10-bit display screen, it can correspond to 1024 grayscale levels from 0 to 1023. For example, the target RGB color table can be shown in Table 1 below:

[0089] Table 1

[0090]

[0091]

[0092] The compensation coefficients corresponding to each color temperature-related parameter can be pre-stored by the user in the display device. Taking the color coordinates of the display screen as an example, the compensation coefficients corresponding to the color coordinates of the display screen can include, for example, the color coordinate horizontal axis compensation coefficient corresponding to the x-axis of the color coordinates, and the color coordinate vertical axis compensation coefficient corresponding to the y-axis of the color coordinates.

[0093] S104. Between the i-th display compensation time and the (i+1)-th display compensation time, control the display screen to display an image based on the target backlight current and the target RGB color table.

[0094] It should be understood that this application does not limit how the display device controls the display screen to display images based on the aforementioned target backlight current and the aforementioned target RGB color table. Optionally, any existing image display method of a display device can be referred to, which will not be elaborated here. Furthermore, it should be understood that this application does not limit whether the display device processes the image based on other image processing methods before displaying the image.

[0095] In this embodiment, the target backlight current between the i-th and (i+1)-th display compensation times can be determined by using the brightness compensation coefficient and the backlight current of the display at the i-th display compensation time. By controlling the display to display images according to this target backlight current, brightness compensation for image display is achieved. Similarly, the target RGB color table required for image display can be determined by using color temperature-related parameters and their corresponding compensation coefficients. By controlling the display to display images according to this target RGB color table, color temperature compensation for image display is achieved. Through this method, brightness and color temperature compensation are achieved after the display device is powered on, improving the stability of image display.

[0096] The following details how a display device determines the target backlight current between the i-th and (i+1)-th display compensation times based on the backlight current of the display at the i-th display compensation time and the brightness compensation coefficient:

[0097] As one possible implementation, the display device can obtain the target backlight current of the display between the i-th and i+1-th display compensation times based on the backlight current of the display at the i-th display compensation time and the product of the backlight current and the brightness compensation coefficient.

[0098] For example, the display device can obtain the target backlight current of the display screen between the i-th display compensation time and the (i+1)-th display compensation time using the following formula (1):

[0099] I=Ii-Ii×Cl(t) (1)

[0100] Where Ii represents the backlight current of the display at the i-th display compensation time. Cl(t) represents the brightness compensation coefficient. I represents the target backlight current of the display between the i-th and (i+1)-th display compensation times. In some embodiments, the display device can also obtain the above-mentioned target backlight current by I = Ii × [1-Cl(t)].

[0101] For example, taking an LCD display as an example, the display device can adjust the backlight current of the display screen through pulse width modulation (PWM).

[0102] In this implementation, the brightness compensation coefficient is used as the current compensation coefficient for current compensation. The backlight current of the display device is adjusted by the brightness compensation coefficient, so that the adjusted backlight current of the display screen can stabilize the brightness of the display screen for image display.

[0103] The following section provides a detailed explanation of how a display device determines the target RGB color table required for image display between the i-th and (i+1)-th display compensation times based on the color temperature-related parameters of the display screen at the i-th display compensation time and the compensation coefficients corresponding to each color temperature-related parameter.

[0104] Figure 4 This is a flowchart illustrating a method for determining a target RGB color table provided in this application. Figure 4 As shown, as one possible implementation, the method may include the following steps:

[0105] S201. Based on the color temperature related parameters of the display screen at the i-th display compensation time, and the compensation coefficients corresponding to each color temperature related parameter, obtain the compensated color coordinates corresponding to each gray level.

[0106] In some embodiments, taking the color temperature-related parameters including the color coordinates of the display screen as an example, the compensation coefficients corresponding to the color temperature-related parameters include: the compensation coefficient corresponding to the color coordinate x of the display screen, and the compensation coefficient corresponding to the color coordinate y of the display screen. In this implementation, the display screen can first obtain the grayscale compensation coefficients corresponding to each grayscale level based on the color coordinate compensation coefficients of each color coordinate at the i-th display compensation time. Then, the display device can obtain the compensated color coordinates corresponding to each grayscale level based on the color coordinates of the display screen at the i-th display compensation time and the grayscale compensation coefficients corresponding to each grayscale level.

[0107] For any given gray level, the gray level compensation coefficients include: a first gray level compensation coefficient and a second gray level compensation coefficient. The first gray level compensation coefficient is used to calculate the compensated color coordinate x corresponding to that gray level. The second gray level compensation coefficient is used to calculate the compensated color coordinate y corresponding to that gray level.

[0108] Optionally, after obtaining the compensation coefficients corresponding to each gray level, the display device can obtain the compensated color coordinates corresponding to each gray level, for example, through the following formulas (2) and (3).

[0109] x=xi×[1-Cxj(t)] (2)

[0110] y = yi × [1 - Cyj(t)] (3)

[0111] Where xi represents the value of the horizontal axis of the color coordinate system at the i-th display compensation time, and yi represents the value of the vertical axis of the color coordinate system at the i-th display compensation time. Cxj(t) represents the first grayscale compensation coefficient corresponding to grayscale j. Cyj(t) represents the second grayscale compensation coefficient corresponding to grayscale j. x represents the value of the horizontal axis of the compensated color coordinate system corresponding to grayscale j. y represents the value of the vertical axis of the compensated color coordinate system corresponding to grayscale j.

[0112] In some embodiments, the display device may also pre-store the values ​​of color temperature-related parameters, the compensation coefficients corresponding to the color temperature-related parameters, and the mapping relationship between the compensated color coordinates of each gray level. In this implementation, the display device can determine the compensated color coordinates of each gray level based on the color temperature-related parameters at the i-th display compensation time, the compensation coefficients corresponding to each color temperature-related parameter, and the mapping relationship between the values ​​of the color temperature-related parameters, the compensation coefficients corresponding to the color temperature-related parameters, and the compensated color coordinates of each gray level.

[0113] S202. Based on the compensated color coordinates corresponding to each gray level, obtain the values ​​of the RGB three channels corresponding to each gray level.

[0114] It should be understood that this application does not limit how the display device obtains the values ​​of the RGB three channels corresponding to each grayscale level based on the compensated color coordinates. Optionally, for any grayscale level, existing methods for converting the color coordinates of that grayscale level into the values ​​of the RGB three channels corresponding to that grayscale level can be referred to.

[0115] For example, according to the principles of color theory, as shown in formula (4) and formula (5) below, the chromatic coordinates (x, y) can first be represented by the tristimulus values ​​X, Y, Z:

[0116]

[0117]

[0118] Based on the above formulas (4) and (5), we can obtain the following formulas (6) and (7).

[0119]

[0120]

[0121] Where Y equals the luminance L corresponding to that grayscale level. Optionally, for any display compensation time, the luminance L corresponding to each grayscale level can be either the compensated luminance L or the uncompensated luminance L corresponding to that grayscale level. Taking the compensated luminance L corresponding to each grayscale level as an example, the specific implementation method of the display device obtaining the compensated luminance L corresponding to each grayscale level can refer to the method of the display device obtaining the color coordinates corresponding to each grayscale level, which will not be elaborated here. Alternatively, the luminance L corresponding to each grayscale level at each display compensation time can also be pre-stored by the user in the display device.

[0122] Then, the display device can convert the above XYZ tristimulus values ​​into RGB stimulus values. Optionally, the conversion relationship between the XYZ tristimulus values ​​and RGB stimulus values ​​can be shown in the following formula (8):

[0123]

[0124] in, Used to represent RGB stimulus values. It should be understood that the constants involved in formula (8) can vary depending on the type of display screen. Taking an 8-bit display screen as an example, for any gray level, the display device can obtain the values ​​of the RGB three channels corresponding to that gray level using the following formula (9):

[0125]

[0126] Where r_gamma is the inverse gamma transform of R, G, and B. r, g, and b can be used to represent the values ​​of the RGB three channels corresponding to this grayscale level. The inverse gamma transform function is as follows:

[0127]

[0128] Here, 's' can represent any one of R, G, and B. The constants in formula (10) can be different for different types of displays.

[0129] Using the above method, the display device can obtain the values ​​of the RGB three channels corresponding to each gray level based on the compensated color coordinates corresponding to each gray level.

[0130] In this embodiment, based on the color temperature parameters and corresponding compensation coefficients of the display screen at the i-th display compensation time, the compensated color coordinates corresponding to each grayscale level can be determined. These compensated color coordinates can then be used to determine the target RGB color table. This method effectively determines the values ​​of the RGB three channels corresponding to each grayscale level, enabling the display screen to maintain stable image display color temperature between the i-th and (i+1)-th display compensation times.

[0131] The following section provides a detailed explanation of how a display device obtains the grayscale compensation coefficients corresponding to each grayscale level based on the color coordinate compensation coefficients at the i-th display compensation time.

[0132] As one possible implementation, for any gray level, the display device can determine the gray level compensation coefficient corresponding to that gray level based on the brightness corresponding to that gray level and the color coordinate compensation coefficient of that gray level.

[0133] In some embodiments, the display device can first determine the grayscale compensation coefficient corresponding to each first grayscale level based on the brightness corresponding to each first grayscale level and the color coordinate compensation coefficient of the first grayscale level. Then, based on the grayscale compensation coefficient corresponding to each first grayscale level, the display device can determine the grayscale compensation coefficient corresponding to each grayscale level. Using this method, the display device does not need to determine the grayscale compensation coefficient for all grayscale levels based on the brightness corresponding to the grayscale level and the color coordinate compensation coefficient of the grayscale level. This improves the efficiency of the display device in obtaining the grayscale compensation coefficient corresponding to each grayscale level, thereby improving the efficiency of the display device in color temperature compensation.

[0134] Optionally, for each first gray level in each gray level, the display device can obtain the gray level compensation coefficient corresponding to each first gray level based on the ratio of the brightness corresponding to the first gray level to the brightness corresponding to the target gray level, and the gray level compensation coefficient corresponding to the target gray level.

[0135] The grayscale compensation coefficient corresponding to the target grayscale is the color coordinate compensation coefficient of each color coordinate at the i-th display compensation time. Taking an 8-bit display screen as an example, the target grayscale can be grayscale 255. That is, the first grayscale compensation coefficient in the grayscale compensation coefficient corresponding to grayscale 255 can be the color coordinate x compensation coefficient of the color coordinate at the i-th display compensation time. The second grayscale compensation coefficient in the grayscale compensation coefficient corresponding to grayscale 255 can be the color coordinate y compensation coefficient of the color coordinate at the i-th display compensation time.

[0136] The aforementioned first grayscale may include, for example, the grayscale corresponding to 10% (10IRE) of the full white field, the grayscale corresponding to 20% (20IRE) of the full white field, the grayscale corresponding to 30% (30IRE) of the full white field, the grayscale corresponding to 40% (40IRE) of the full white field, the grayscale corresponding to 50% (50IRE) of the full white field, the grayscale corresponding to 60% (60IRE) of the full white field, the grayscale corresponding to 70% (70IRE) of the full white field, the grayscale corresponding to 80% (80IRE) of the full white field, and the grayscale corresponding to 90% (90IRE) of the full white field. Optionally, the aforementioned first grayscale may also be other grayscales, and this application does not limit this.

[0137] Optionally, the display device may pre-store a mapping relationship between gray levels and brightness. Based on this mapping relationship, and the first gray level and the target gray level, the display device can obtain the brightness corresponding to the first gray level and the brightness corresponding to the target gray level. Then, for example, the display device can obtain the gray level compensation coefficient corresponding to each first gray level according to the following formula (11) and formula (12):

[0138]

[0139]

[0140] Where Cx(t) represents the first grayscale compensation coefficient corresponding to the target grayscale, which is the x-coordinate compensation coefficient of the color coordinate at the i-th display compensation time. Cy(t) represents the second grayscale compensation coefficient corresponding to the target grayscale, which is the y-coordinate compensation coefficient of the color coordinate at the i-th display compensation time. WLj represents the brightness corresponding to the first grayscale j. WL100 represents the brightness corresponding to the target grayscale.

[0141] After obtaining the grayscale compensation coefficients corresponding to each first grayscale level, the display device can obtain the grayscale compensation coefficients corresponding to each grayscale level within each grayscale level based on the grayscale compensation coefficients corresponding to each first grayscale level. Optionally, the display device can, for example, use linear interpolation to perform linear interpolation on the grayscale compensation coefficients corresponding to each first grayscale level to obtain the grayscale compensation coefficients corresponding to each grayscale level within each grayscale level.

[0142] In some embodiments, the display device may further obtain a grayscale compensation coefficient for each grayscale level based on the ratio of the brightness corresponding to the grayscale level to the brightness corresponding to the target grayscale level, and the grayscale compensation coefficient corresponding to the target grayscale level, thereby obtaining a grayscale compensation coefficient corresponding to each grayscale level.

[0143] As another possible implementation, the display device may, for example, pre-store the mapping relationship between the color coordinate compensation coefficient and the grayscale compensation coefficient corresponding to each grayscale level at each display compensation time. In this implementation, for example, the display device can determine the first grayscale compensation coefficient corresponding to each grayscale level based on the color coordinate compensation coefficient at the i-th display compensation time for color coordinate x, and the mapping relationship between the color coordinate compensation coefficient and the first grayscale compensation coefficient corresponding to each grayscale level. The display device can determine the second grayscale compensation coefficient corresponding to each grayscale level based on the color coordinate compensation coefficient at the i-th display compensation time for color coordinate y, and the mapping relationship between the color coordinate compensation coefficient and the second grayscale compensation coefficient corresponding to each grayscale level.

[0144] In this embodiment, the grayscale compensation coefficient can be determined based on the brightness corresponding to different grayscale levels, and the grayscale compensation coefficient for each grayscale level can be determined based on the grayscale compensation coefficient of the first grayscale level. This method improves the accuracy of determining the color coordinates corresponding to each grayscale level, thereby improving the accuracy of the color temperature displayed by the display device. By obtaining the grayscale compensation coefficient for each grayscale level from the grayscale compensation coefficient of the first grayscale level, the display device does not need to calculate the brightness ratio for all grayscale levels, thus improving the efficiency of obtaining the grayscale compensation coefficients corresponding to all grayscale levels.

[0145] As one possible implementation, the display device can also determine the duration between the i-th display compensation time and the (i+1)-th display compensation time according to the type of image to be displayed, so as to further improve the stability of the display device in displaying images.

[0146] Optionally, the display device can first detect the type of the image to be displayed and obtain an image type detection result. Then, based on the image type detection result, the duration between the i-th display compensation time and the (i+1)-th display compensation time is determined. The image type detection result is used to characterize whether the image to be displayed is a High Dynamic Range (HDR) image.

[0147] If the image type detection result indicates that the image to be displayed is an HDR image, it means that the image consumes a lot of power and the display device has a large temperature change rate, which may lead to a high brightness and color temperature change rate when the display device displays the image. Therefore, the display device can improve the stability of image display by increasing the frequency of display compensation.

[0148] If the image type detection result is used to characterize the image to be displayed as a non-HDR image, for example, the image to be displayed can be a Standard Dynamic Range (SDR) image, it means that the power consumption of the image to be displayed is low, the temperature change rate of the display device is small, and thus the brightness and color temperature change rate of the display device are small when the display device displays the image.

[0149] Therefore, when the image type detection result is used to characterize the image to be displayed as an HDR image, the display device can determine the duration between the i-th display compensation time and the (i+1)-th display compensation time as a first duration. When the image type detection result is used to characterize the image to be displayed as a non-HDR image, the display device can determine the duration between the i-th display compensation time and the (i+1)-th display compensation time as a second duration. The first duration is shorter than the second duration. Both the first and second durations can be pre-stored by the user in the electronic device.

[0150] In this implementation, it should be understood that this application does not limit how the display device detects whether the image to be displayed is an HDR image. Optionally, any existing image type detection method can be referred to to determine whether the image to be displayed is an HDR image, which will not be elaborated here.

[0151] As a possible implementation, the display device can further determine the compensation time based on the power-on / off duration of the display device. This method considers the situation where, in cases of short power-off times, the display device may not have fully cooled down, and upon restarting, the temperature from the previous power-on period may still affect the current image display. This method further improves the stability of image display. For example, Figure 5 This application provides a flowchart illustrating a method for determining the display compensation time of a display device.

[0152] In some embodiments, the display device can obtain the duration between the last power-off time and the current power-on time. That is, the display device can obtain the continuous duration during which the display device was in a power-off state before the current power-on. Optionally, the display device can, for example, record the power-off time using a timer before each power-off and record the power-on time after each power-on. The display device can determine the duration between the last power-off time and the current power-on time by reading the last power-off time and the current power-on time.

[0153] If the display device determines that the time between the last power-off time and the current power-on time is less than the preset time, it indicates that the display device has been in a power-off state for a short period of time, and the display device temperature has not yet decreased. Therefore, the image display after the current power-on is still affected by the previous power-on. Thus, the display device can determine the corresponding display compensation times after the current power-on based on the operating time since the last power-on.

[0154] When the display device determines that the duration between the last power-off time and the current power-on time is less than a preset duration, for example, if the aforementioned i has a maximum value, and the maximum value is N, where N is an integer greater than or equal to 1, the display device can further determine whether the running time of the display device since the last power-on is less than the total compensation duration. This total compensation duration is equal to the duration between the last power-on time of the display device and the (N+1)th display compensation time. Optionally, this total compensation duration can be pre-stored by the user in the display device. Optionally, the display device can record the running time of the display device since the last power-on using a timer.

[0155] If the runtime since the last power-on is less than the total compensation time, it indicates that the brightness and color temperature of the displayed image still vary. Therefore, the display device can determine the corresponding display compensation times after the current power-on, and the display compensation times that were not reached after the last power-on. This method allows the display device to perform compensation based on the compensation state before the last power-off upon restarting, further improving the stability of image display.

[0156] Optionally, the display device can, for example, repeatedly call the pointer corresponding to the last display compensation moment used before the last power-off to achieve the correspondence between each display compensation moment after the current power-on and each display compensation moment that the display device has not reached since the last power-on.

[0157] If the runtime since the last power-on is greater than or equal to the total compensation time, it indicates that the brightness and color temperature of the displayed image have not changed. Optionally, the display device can, for example, determine that after this power-on, for example, Figure 5 As shown, no compensation is made to the image display on the display device, meaning that the image display can be performed without relying on the aforementioned image display method.

[0158] If the display device determines that the duration between the last power-off time and the current power-on time is greater than or equal to a preset duration, it indicates that the display device has been in a power-off state for a relatively long time, and its temperature has decreased. Therefore, image display after the current power-on is unaffected by the previous power-on. Optionally, the display device does not need to determine the corresponding display compensation times after the current power-on based on the operating time since the last power-on. For example, if... Figure 5 As shown, the display device can display an image from the first display compensation time, based on the parameters corresponding to the first display compensation time, using the methods described in the aforementioned embodiments.

[0159] Figure 6 A flowchart illustrating another image display method provided in this application. Figure 6 As shown, the method may include the following steps:

[0160] Step 1: Through offline experiments, determine the brightness compensation coefficient and color coordinate compensation coefficient of the display screen at each display compensation time and store them in the display device.

[0161] Users can select a display screen of the same type as the aforementioned display device and conduct the following offline experiment to determine the brightness compensation coefficient and color coordinate compensation coefficient. Using a brightness detection device, the brightness value L of the display screen at each display compensation moment in a preset state can be read. Using a color coordinate detection device, the color coordinates (x, y) of the display screen at each display compensation moment in a preset state can be read. The aforementioned preset state refers to a state where the display device does not perform any brightness or color temperature adjustments on the displayed image.

[0162] Assume the total compensation duration is ts minutes. ts minutes is the total time from the initial power-on state to the stable state of the display screen. Assume the brightness and color coordinate values ​​are read every tg minutes. By calculating the error between the read values ​​and the target values, the change rate of the values ​​at this time is obtained, and the compensation coefficients Cl(t), Cx(t), and Cy(t) are further derived. Wherein, Cl(t) represents the brightness compensation coefficient at time t, Cx(t) represents the color coordinate x compensation coefficient at time t, and Cy(t) represents the color coordinate y compensation coefficient at time t. Optionally, the formulas for obtaining Cl(t), Cx(t), and Cy(t) can be as follows: formula (13), formula (14), and formula (15):

[0163]

[0164]

[0165]

[0166] Where n = ts / tg, Lm represents the target brightness value, xm represents the target value of the color coordinate x, and ym represents the target value of the color coordinate y. t represents the display compensation time. L(t) represents the detected brightness value of the display screen, x(t) represents the detected value of the color coordinate x of the display screen, and y(t) represents the detected value of the color coordinate y of the display screen. The target brightness value, the target value of the color coordinate x, and the target value of the color coordinate y can be defined according to the specifications or requirements of the display device. For example, the target brightness value can be 1000 nits, and the target value of the color coordinates can be (xm, ym) = (0.3127, 0.329).

[0167] Optionally, the above formula can also be integrated into an electronic device, where the user can input (Lm, xm, ym, ts, tg). The electronic device can then output the brightness compensation parameters and color coordinate compensation parameters corresponding to each display compensation time based on the user-input parameters.

[0168] Step 2: The display device obtains the backlight current of the display screen at the i-th display compensation time, as well as the color coordinates.

[0169] Step 3: The display device obtains the target backlight current of the display screen between the i-th and i+1-th display compensation times based on the backlight current of the display screen at the i-th display compensation time and the product of the backlight current and the brightness compensation coefficient.

[0170] Step 4: The display device obtains the gray level compensation coefficient corresponding to each gray level based on the ratio of the brightness corresponding to each gray level to the brightness corresponding to gray level 255, and the gray level compensation coefficient corresponding to gray level 255.

[0171] Step 5: The display device obtains the compensated color coordinates for each gray level based on the gray level compensation coefficient and the color coordinates.

[0172] Step 6: The display device obtains the compensated RGB values ​​corresponding to each gray level based on the color coordinates of each gray level, which is the target RGB color table.

[0173] In some embodiments, the RGB color table may also be referred to as a gamma table.

[0174] Step 7: Between the i-th display compensation time and the (i+1)-th display compensation time, the display device controls the display screen to display an image based on the target backlight current and the target RGB color table.

[0175] In existing image display methods, the brightness and color temperature of the display screen constantly change during the power-on aging period of the display device. However, in this embodiment, the display device automatically runs the aforementioned image display algorithm during the power-on ts period, ensuring that the brightness and color temperature of the display screen automatically adjust over time, thus guaranteeing the stability of the displayed image.

[0176] In some embodiments, R is assumed to be the built-in input resistance of the display device, which is a fixed constant. According to the relationship between current and power, P = I... 2 ×R. Therefore, the total power of the display device after brightness compensation can be expressed by the following formula (16):

[0177] P(t) = [Ii*(1-Cl(t))] 2 ×R (16)

[0178] Wherein, P(t) represents the total power of the display device when it executes the image display method provided in this application. Formula (16) can be converted to P(t) = Ii 2 ×R×(1-Cl(t)) 2 That is, P(t) = Pi × (1 - Cl(t)) 2Wherein, Pi represents the total power of the display device when it is not performing the image display method described in any of the above embodiments.

[0179] Therefore, the power ratio of the display device before and after brightness compensation can be expressed by the following formula (17):

[0180]

[0181] In other words, when the image display method provided in this application is not used, the power of the entire display device is a constant value. When the display device executes the image display method provided in this application, the adjustment of the screen brightness and color temperature will be reflected in the change of the power of the entire display device. The power of the entire display device is not a constant value. The power of the entire display device can change with time. Optionally, the change law of the power of the entire device with time can conform to the above formula (17).

[0182] Figure 7 This is a schematic diagram of the structure of an image display device provided in this application. Figure 7 As shown, the device may include: an acquisition module 31, a processing module 32, and a control module 33. Among them,

[0183] The acquisition module 31 is used to acquire the backlight current of the display screen at the i-th display compensation time, and color temperature related parameters. The backlight current of the display screen is positively correlated with the brightness of the display screen, and the color temperature related parameters include: the color coordinates of the display screen; i is an integer greater than or equal to 1.

[0184] Processing module 32 is configured to determine the target backlight current of the display screen between the i-th and i+1-th display compensation times based on the backlight current of the display screen at the i-th display compensation time and the brightness compensation coefficient; and to determine the target RGB color table required for image display between the i-th and i+1-th display compensation times based on the color temperature related parameters of the display screen at the i-th display compensation time and the compensation coefficients corresponding to each color temperature related parameter. The target RGB color table includes the values ​​of the RGB three channels corresponding to each grayscale level.

[0185] The control module 33 is used to control the display screen to display an image based on the target backlight current and the target RGB color table between the i-th display compensation time and the (i+1)-th display compensation time.

[0186] Optionally, the processing module 32 is specifically used to obtain the compensated color coordinates corresponding to each gray level based on the color temperature related parameters of the display screen at the i-th display compensation time and the compensation coefficients corresponding to each color temperature related parameter; and to obtain the values ​​of the RGB three channels corresponding to each gray level based on the compensated color coordinates corresponding to each gray level.

[0187] Optionally, the color temperature related parameters include the color coordinates of the display screen. In this implementation, the processing module 32 is specifically used to obtain the grayscale compensation coefficients corresponding to each grayscale level based on the color coordinate compensation coefficients of each color coordinate at the i-th display compensation time; and to obtain the compensated color coordinates corresponding to each grayscale level based on the color coordinates of the display screen at the i-th display compensation time and the grayscale compensation coefficients corresponding to each grayscale level.

[0188] Optionally, the processing module 32 is specifically configured to, for each first gray level in the gray levels, obtain a gray level compensation coefficient corresponding to each first gray level based on the ratio of the brightness corresponding to the first gray level to the brightness corresponding to the target gray level, and the gray level compensation coefficient corresponding to the target gray level; and obtain a gray level compensation coefficient corresponding to each gray level in the gray levels based on the gray level compensation coefficients corresponding to each first gray level. Wherein, the gray level compensation coefficient corresponding to the target gray level is the color coordinate compensation coefficient of each color coordinate at the i-th display compensation time.

[0189] Optionally, the processing module 32 is specifically used to obtain the target backlight current of the display screen between the i-th and i+1-th display compensation times based on the backlight current of the display screen at the i-th display compensation time and the product of the backlight current and the brightness compensation coefficient.

[0190] Optionally, the processing module 32 is further configured to detect the type of the image to be displayed, and obtain an image type detection result; based on the image type detection result, determine the duration between the i-th display compensation time and the (i+1)-th display compensation time. The image type detection result is used to characterize whether the image to be displayed is a high dynamic range (HDR) image.

[0191] Optionally, the acquisition module 31 is further configured to acquire the duration between the last power-off time and the current power-on time of the display device; the processing module 32 is further configured to, when it is determined that the duration between the last power-off time and the current power-on time is less than a preset duration, determine the corresponding display compensation times of the display device after the current power-on based on the running time of the display device after the last power-on.

[0192] Optionally, the maximum value of i is N; N is an integer greater than or equal to 1. Optionally, the processing module 32 is further configured to, when the running time of the display device after the last power-on is less than the total compensation time, determine the corresponding display compensation times after the current power-on, and associate them with the display compensation times that the display device has not reached since the last power-on. Wherein, the total compensation time is equal to the time between the last power-on time of the display device and the (N+1)th display compensation time.

[0193] The image display device provided in this application is used to execute the aforementioned image display method embodiments. Its implementation principle and technical effect are similar, and will not be described in detail here.

[0194] This application also provides a computer-readable storage medium, which may include various media capable of storing program code, such as a USB flash drive, a portable hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk. Specifically, the computer-readable storage medium stores program instructions, which are used in the methods described in the above embodiments.

[0195] This application also provides a program product including executable instructions stored in a readable storage medium. At least one control module of a display device can read the executable instructions from the readable storage medium, and the at least one control module executes the executable instructions to cause the display device to implement the image display methods provided in the various embodiments described above.

[0196] Finally, it should be noted that the above 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 or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

[0197] For ease of explanation, the above description has been provided in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or to limit the embodiments to the specific forms disclosed above. Various modifications and variations can be obtained based on the above teachings. The selection and description of the above embodiments are for the purpose of better explaining the principles and practical applications, thereby enabling those skilled in the art to better utilize the described embodiments and various different variations of embodiments suitable for specific use considerations.

Claims

1. A display device, characterized by comprising: The display screen is used for displaying images. A processor connected with the display screen, the processor is configured to: obtain the backlight current of the display screen at the i th display compensation moment, and a color temperature related parameter; The backlight current of the display screen is positively correlated with the brightness of the display screen, and the color temperature related parameter includes the color coordinates of the display screen; i is an integer greater than or equal to 1; According to the backlight current of the display screen at the i th display compensation moment, and a brightness compensation coefficient, determine the target backlight current of the display screen between the i th display compensation moment and the i+1 th display compensation moment. According to the color temperature related parameter of the display screen at the i th display compensation moment, and the compensation coefficient corresponding to each color temperature related parameter, determine the target RGB color table required for image display of the display screen between the i th display compensation moment and the i+1 th display compensation moment, the target RGB color table includes the values of the RGB three channels corresponding to each gray scale. According to the target backlight current and the target RGB color table, control the display screen to display images between the i th display compensation moment and the i+1 th display compensation moment. The processor is configured to:

2. The display device of claim 1, wherein, According to the color temperature related parameter of the display screen at the i th display compensation moment, and the compensation coefficient corresponding to each color temperature related parameter, obtain the compensated color coordinates corresponding to each gray scale; According to the compensated color coordinates corresponding to each gray scale, obtain the values of the RGB three channels corresponding to each gray scale. The color temperature related parameter includes the color coordinates of the display screen, and the processor is configured to:

3. The display device of claim 2, wherein, For each first gray scale in the gray scales, according to the ratio of the brightness corresponding to the first gray scale to the brightness corresponding to the target gray scale, and the gray scale compensation coefficient corresponding to the target gray scale, obtain the gray scale compensation coefficient corresponding to each first gray scale; the gray scale compensation coefficient corresponding to the target gray scale is the color coordinate compensation coefficient of each color coordinate at the i th display compensation moment; According to the gray scale compensation coefficient corresponding to each first gray scale, obtain the gray scale compensation coefficient corresponding to each gray scale in the gray scales; According to the color coordinates of the display screen at the i th display compensation moment, and the gray scale compensation coefficient corresponding to each gray scale, obtain the compensated color coordinates corresponding to each gray scale. The processor is configured to:

4. The display device according to any of claims 1-3, characterized in that, According to the backlight current of the display screen at the i th display compensation moment, and the product of the backlight current and the brightness compensation coefficient, obtain the target backlight current of the display screen between the i th display compensation moment and the i+1 th display compensation moment. The processor is configured to:

5. The display device according to any of claims 1-3, characterized in that, Detect the type of the image to be displayed to obtain an image type detection result; the image type detection result is used to represent whether the image to be displayed is a high dynamic range (HDR) image; According to the image type detection result, determine the time length between the i th display compensation moment and the i+1 th display compensation moment. The processor is configured to:

6. The display device according to any of claims 1-3, characterized in that, Obtain the time length between the last shutdown moment of the display device and the current startup moment; ​ If it is determined that the time length between the last shutdown time and the current startup time is less than the preset time length, then according to the running time length of the display device after the last startup, the corresponding display compensation time of the display device after the current startup is determined.

7. The display device of claim 6, wherein, The maximum value of i is N; the N is an integer greater than or equal to 1, and the processor is configured to: If the running time length of the display device after the last startup is less than the compensation total time length, then the corresponding display compensation time of the display device after the current startup is determined, which corresponds to the display compensation time that the display device has not reached after the last startup; the compensation total time length is equal to the time length between the last startup time of the display device and the N+1th display compensation time.

8. An image display method characterized by The method comprises: obtaining the backlight current of the display screen at the i th display compensation time, and the color temperature related parameter; the backlight current of the display screen is positively correlated with the brightness of the display screen, and the color temperature related parameter comprises the color coordinate of the display screen; the i is an integer greater than or equal to 1; determining the target backlight current between the i th display compensation time and the i+1th display compensation time of the display screen according to the backlight current of the display screen at the i th display compensation time and the brightness compensation coefficient; determining the target RGB color table required for image display between the i th display compensation time and the i+1th display compensation time of the display screen according to the color temperature related parameter of the display screen at the i th display compensation time and the compensation coefficient corresponding to each color temperature related parameter; the target RGB color table comprises the value of RGB three channels corresponding to each gray scale; between the i th display compensation time and the i+1th display compensation time, controlling the display screen to perform image display according to the target backlight current and the target RGB color table.

9. A display device, characterized by It comprises: a display screen for displaying images; a processor connected with the display screen, the processor is configured to execute the image display method of claim 8; during the execution of the image display method by the processor, the power of the display device changes with time.

10. The display device of claim 9, wherein, The change rule of the power of the display device changing with time meets the following formula: wherein P(t) represents the power of the display device at t time when the display device executes the image display method; Pi represents the power of the display device; Cl(t) represents the brightness compensation coefficient corresponding to t time.

Images