Display device and display correction method of display device

Abstract

Embodiments of the present application provide a display device and a display correction method of the display device, and relate to the technical field of display. The display device comprises a display configured to display image content; a backlight module configured to provide a backlight light source for the display; and a controller configured to determine a standard gamma table corresponding to a preset backlight value; obtain a color coordinate compensation coefficient; determine a color coordinate deviation value at a current temperature according to the color coordinate compensation coefficient; update the standard gamma table according to the color coordinate deviation value at the current temperature, and display the image content by using the updated standard gamma table. Embodiments of the present application compensate for the influence of temperature on the color of the display device, improve the accuracy of color compensation of the display device, and improve the display effect of the display device.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display. More particularly, it relates to a display device and a display correction method of the display device. BACKGROUND

[0002] With the development of science and technology and the improvement of people's living standards, people's requirements for color restoration and picture display of display devices are getting higher and higher. It is found in the development process of display devices that the color is warm and the color temperature is inaccurate when the display device is just turned on, and the color can only be stabilized after about half an hour.

[0003] In the prior art, some display devices compensate colors according to the boot time, but as the boot time changes, the temperature of the display device also changes, and the temperature rise will cause color deviation problems. Different design architectures have different temperature rise curves of display devices, so color compensation according to time is not accurate enough, and the display device still has color deviation problems, which affects the display effect of the display device. SUMMARY

[0004] To solve the problems set forth in the background, the embodiments of the present application provide a display device and a display correction method of the display device, which compensate for the influence of temperature on the color of the display device, improve the accuracy of color compensation of the display device, and improve the display effect of the display device.

[0005] The technical solutions provided by the embodiments of the present application are as follows:

[0006] In a first aspect, the embodiments of the present application provide a display device, comprising:

[0007] a display configured to display image content;

[0008] a backlight module configured to provide a backlight light source for the display;

[0009] a controller configured to:

[0010] determine a standard gamma table corresponding to a preset backlight value;

[0011] obtain a color coordinate compensation coefficient;

[0012] determine a color coordinate deviation value at a current temperature according to the color coordinate compensation coefficient;

[0013] update the standard gamma table according to the color coordinate deviation value at the current temperature, and display image content using the updated standard gamma table.

[0014] In a second aspect, the embodiments of the present application provide a display correction method of a display device, applied to a display device, and the method comprises:

[0015] determine a standard gamma table corresponding to the preset backlight value;

[0016] obtain a color coordinate compensation coefficient;

[0017] determine a color coordinate deviation value at a current temperature according to the color coordinate compensation coefficient;

[0018] determine a gamma table deviation value according to the color coordinate deviation value at the current temperature;

[0019] update the standard gamma table according to the gamma table deviation value, and display image content by using the updated standard gamma table.

[0020] In a third aspect, an electronic device is provided, including a memory and a processor, the memory is configured to store a computer program, and the processor is configured to, when executing the computer program, enable the electronic device to implement the display correction method of the display device according to the second aspect or any one of the embodiments of the second aspect.

[0021] In a fourth aspect, a computer readable storage medium is provided, and the computer readable storage medium stores a computer program, and when the computer program is executed by a computing device, the computing device is enabled to implement the display correction method of the display device according to the second aspect or any one of the embodiments of the second aspect.

[0022] In a fifth aspect, a computer program product is provided, and when the computer program product is executed on a computer, the computer is enabled to implement the display correction method of the display device according to the second aspect or any one of the embodiments of the second aspect.

[0023] According to the above technical solutions, the display device and the display correction method of the display device provided by the embodiments of the present application are as follows: after determining a standard gamma table corresponding to a preset backlight value, a color coordinate compensation coefficient is obtained, a color coordinate deviation value at a current temperature is determined according to the color coordinate compensation coefficient, and a gamma table deviation value is determined according to the color coordinate deviation value at the current temperature; the standard gamma table is updated according to the gamma table deviation value, and image content is displayed by using the updated standard gamma table. Therefore, the display device and the display correction method of the display device provided by the embodiments of the present application utilize the rule of the change of the display and the temperature, determine a color coordinate compensation coefficient, determine a color coordinate deviation value at a current temperature by using the color coordinate compensation coefficient, deduce a gamma table deviation value to update a standard gamma table, and display image content by using the updated standard gamma table, thereby compensating for the influence of the temperature on the color of the display device, avoiding the problem that the change of the temperature leads to inaccurate color display, improving the accuracy of color compensation of the display device, and improving the display effect of the display device. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the present application, the drawings required to be used in the embodiments will be briefly introduced as follows. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0025] Figure 1 A schematic diagram of an operating scenario between a display device and a control device according to an exemplary embodiment of the present application;

[0026] Figure 2 A configuration block diagram of a control device according to an exemplary embodiment of the present application;

[0027] Figure 3 A configuration block diagram of a display device according to an exemplary embodiment of the present application;

[0028] Figure 4 A video on demand program interface schematic diagram of a display device according to an exemplary embodiment of the present application;

[0029] Figure 5 A flow schematic diagram of a display correction method of a display device according to an exemplary embodiment of the present application;

[0030] Figure 6 A flow schematic diagram of a display correction method of another display device according to an exemplary embodiment of the present application;

[0031] Figure 7 A specific flow schematic diagram of a display correction method of a display device according to an exemplary embodiment of the present application;

[0032] Figure 8 A specific flow schematic diagram of a display correction method of another display device according to an exemplary embodiment of the present application;

[0033] Figure 9 A specific flow schematic diagram of a display correction method of another display device according to an exemplary embodiment of the present application;

[0034] Figure 10 A structure schematic diagram of a device according to an exemplary embodiment of the present application. DETAILED DESCRIPTION

[0035] In order to make the purpose and implementation of the present application more clear, the exemplary embodiments of the present application will be described clearly and completely in combination with the drawings of the exemplary embodiments of the present application. Obviously, the described exemplary embodiments are only some of the embodiments of the present application, but not all the embodiments.

[0036] It should be noted that the brief description of the terms in the present application is only for the convenience of understanding the embodiments described below, and is not intended to limit the embodiments of the present application. Unless otherwise specified, these terms should be understood according to their ordinary and general meanings.

[0037] The terms "first", "second", "third" and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar or identical objects or entities, and do not necessarily mean a specific order or sequence, unless otherwise noted. It should be understood that the terms used in this way can be interchanged under appropriate circumstances.

[0038] The terms "include" and "have" and any variations thereof are intended to cover but not exclusive inclusion, for example, a product or device including a series of components does not have to be limited to all components clearly listed, but can include other components not clearly listed or inherent to these products or devices.

[0039] Figure 1 A schematic diagram of an operating scenario between a display device and a control device according to an exemplary embodiment of the present application is shown. As shown, a user can operate the display device 200 through the smart device 300 or the control device 100. Figure 1 As shown, a user can operate the display device 200 through the smart device 300 or the control device 100.

[0040] In some embodiments, the control device 100 can be a remote controller, and the communication between the remote controller and the display device 200 can include infrared protocol communication or Bluetooth protocol communication, and other short-distance communication methods, to control the display device 200 by wireless or wired means. The user can input user instructions through the keys on the remote controller, voice input, control panel input, etc. to control the display device 200.

[0041] In some embodiments, the smart device 300 (such as a mobile terminal, a tablet computer, a computer, a notebook computer, etc.) can also be used to control the display device 200. For example, the display device 200 is controlled using an application running on the smart device.

[0042] In some embodiments, the display device 200 can not use the above-mentioned smart device or control device to receive instructions, but can receive user control through touch or gesture, etc.

[0043] In some embodiments, the display device 200 can also be controlled in ways other than the control device 100 and the smart device 300, for example, the user's voice instructions can be received directly through a voice instruction acquisition module configured inside the display device 200, or the user's voice instructions can be received through a voice control device set outside the display device 200.

[0044] In some embodiments, the display device 200 also communicates data with the server 400. The display device 200 can be allowed to be connected in communication through a local area network (LAN), a wireless local area network (WLAN), and other networks. The server 400 can provide various content and interactions to the display device 200. The server 400 can be one cluster or multiple clusters, and can include one or more types of servers.

[0045] Figure 2 A configuration block diagram of a control device according to an exemplary embodiment of the present application is shown. As shown, the control device 100 includes a controller 110, a communicator 130, a user input / output interface 140, a memory, a power supply. The control device 100 can receive input operation instructions of a user, the communicator 130 is in communication connection with the display device, and the control device 100 converts the operation instructions into instructions that the display device 200 can recognize and respond to, playing the role of an intermediary in the interaction between the user and the display device 200. Figure 2

[0046] Figure 3 A configuration block diagram of a display device according to an exemplary embodiment of the present application is shown. As shown, the display device 200 includes a tuner and demodulator 210, a communicator 220, a detector 230, an external device interface 240, a controller 250, a display 260, an audio output interface 270, a memory, a power supply, and at least one of a user interface. Figure 3

[0047] In some embodiments, the controller 250 includes a processor, a video processor, an audio processor, a graphics processor, a RAM, a ROM, a first interface to an n-th interface for input / output.

[0048] The display 260 is used to display an interface, including a display screen component for presenting a picture, and a driving component for driving image display, a component for receiving an image signal originating from the output of the controller, and displaying video content, image content, and a menu control interface, and a user control UI interface.

[0049] The communicator 220 is a component for communicating with external devices or servers according to various communication protocol types. For example, the communicator can include at least one of a Wifi module, a Bluetooth module, a wired Ethernet module, and other network communication protocol chips or near field communication protocol chips, and an infrared receiver. The display device 200 can be in communication connection with the control device 100 or the server 400 through the communicator 220, i.e., to establish the sending and receiving of control signals and data signals.

[0050] The user interface can be used to receive control signals of the control device 100 (such as an infrared remote control, etc.).

[0051] ​​The detector 230 is configured to acquire signals of an external environment or interaction with the external environment. For example, the detector 230 includes a light receiver configured to acquire an intensity of ambient light, a sensor configured to acquire an intensity of ambient light, or an image acquirer such as a camera configured to acquire an external environment scene, a user attribute, or a user interaction gesture. Alternatively, the detector 230 includes a sound acquirer such as a microphone configured to acquire an external sound.

[0052] The external device interface 240 can include, but is not limited to, any one or more of a high-definition multimedia interface (HDMI), an analog or digital high-definition component input interface (component), a composite video input interface (CVBS), a USB input interface (USB), an RGB port, or the like. The external device interface 240 can also include a composite input / output interface formed by a plurality of the above interfaces.

[0053] The tuner-demodulator 210 receives broadcast television signals through wired or wireless reception and demodulates audio / video signals and EPG data signals from the received broadcast television signals.

[0054] In some embodiments, the controller 250 and the tuner-demodulator 210 can be located in different devices. For example, the tuner-demodulator 210 can be located in an external device such as an external set-top box, which is separate from the main device in which the controller 250 is located.

[0055] The controller 250 controls the operation of the display device 200 and responds to user operations by executing various software control programs stored in the memory. The controller 250 controls the overall operation of the display device 200. For example, in response to receiving a user command for selecting a UI object displayed on the display 260, the controller 250 can perform an operation related to the object selected by the user command.

[0056] In some embodiments, the controller 250 includes at least one of a central processing unit (CPU), a video processor, an audio processor, a graphics processing unit (GPU), a RAM (Random Access Memory), a ROM (Read-Only Memory), a first to nth interface for input / output, a communication bus, or the like.

[0057] A user can input a user command through a graphical user interface (GUI) displayed on the display 260, and the user input interface receives the user input command through the graphical user interface (GUI). Alternatively, a user can input a user command by inputting a specific sound or gesture, and the user input interface receives the user input command by recognizing the sound or gesture through a sensor.

[0058] A "user interface" is the medium through which an application or operating system interacts and exchanges information with the user. It converts information from its internal form to a form that the user can accept. A common form of user interface is the graphical user interface (GUI), which refers to a user interface related to computer operation displayed graphically. It can be an icon, window, control, or other interface element displayed on the screen of an electronic device. Controls can include visual interface elements such as icons, buttons, menus, tabs, text boxes, dialog boxes, status bars, navigation bars, and widgets.

[0059] In some embodiments, after the display device is started, it can directly enter the interface of a preset video-on-demand program. The interface of the video-on-demand program can be as follows: Figure 4 As shown, it includes at least a navigation bar 310 and a content display area located below the navigation bar 310. The content displayed in the content display area changes as the selected control in the navigation bar changes. Programs in the application layer can be integrated into a video-on-demand program and displayed via a control in the navigation bar, or further displayed after an application control in the navigation bar is selected.

[0060] In some embodiments, after the display device is started, it can directly enter the display interface of the last selected signal source, or the signal source selection interface. The signal source can be a preset video-on-demand program, or at least one of an HDMI interface, a live TV interface, etc. After the user selects different signal sources, the display can show content obtained from those different signal sources. Applications within the system can...

[0061] In some embodiments, the hardware or software architecture may be based on the description in the above embodiments, and in some embodiments...

[0062] The solution can be based on other similar hardware or software architectures that can implement the technical solution of this application.

[0063] In some embodiments, the display device 200 may be a terminal device with display functionality, such as a television, smartphone, computer, or educational device. The display device 200 includes:

[0064] Monitor 260 is configured to display image content.

[0065] A backlight module is configured to provide a backlight source to the display.

[0066] and the controller 250 is configured to: determine a standard gamma table corresponding to the preset backlight value; obtain a color coordinate compensation coefficient; determine a color coordinate deviation value at a current temperature according to the color coordinate compensation coefficient; update the standard gamma table according to the color coordinate deviation value at the current temperature, and display image content by using the updated standard gamma table.

[0067] In some embodiments, the controller 250 can: determine corresponding standard chrominance values and / or standard luminance values according to the current setting of the backlight value; sense the three-primary-color gray scale values of the backlight module; determine real-time chrominance values and / or real-time luminance values according to the three-primary-color gray scale values of the backlight module; and adjust the driving signal of the backlight module according to the difference between the real-time chrominance values and the standard chrominance values, and / or the difference between the real-time luminance values and the standard luminance values, so that the real-time backlight value of the backlight module is consistent with the preset backlight value.

[0068] In some embodiments, the controller 250 can adjust the duty cycle of the backlight pulse width modulation signal and / or the backlight driving current according to the difference between the real-time chrominance values and the standard chrominance values, and / or the difference between the real-time luminance values and the standard luminance values, so that the real-time backlight value of the backlight module is consistent with the preset backlight value.

[0069] In some embodiments, the controller 250 can: if the real-time chrominance values are greater than the standard chrominance values, and / or the real-time luminance values are greater than the standard luminance values, decrease the duty cycle of the backlight pulse width modulation signal and / or the backlight driving current, so that the real-time backlight value of the backlight module is consistent with the preset backlight value; and if the real-time chrominance values are less than the standard chrominance values, and / or the real-time luminance values are less than the standard luminance values, increase the duty cycle of the backlight pulse width modulation signal and / or the backlight driving current, so that the real-time backlight value of the backlight module is consistent with the preset backlight value.

[0070] In some embodiments, the controller 250 can sense the three-primary-color gray scale values at multiple different positions of the backlight module; and adjust the driving signal of the backlight module at the corresponding positions according to the difference between the real-time chrominance values and the standard chrominance values at the corresponding positions of the backlight module, and / or the difference between the real-time luminance values and the standard luminance values at the corresponding positions of the backlight module, so that the real-time backlight value of the backlight module is consistent with the preset backlight value.

[0071] In some embodiments, the controller 250 can determine whether the current boot-up running time is greater than a preset time threshold; if the current boot-up running time is greater than the preset time threshold, sense the three primary color gray scale values of the backlight module at a first time interval, otherwise sense the three primary color gray scale values of the backlight module at a second time interval; wherein the first time interval is greater than the second time interval.

[0072] In some embodiments, the controller 250 can determine the color coordinate deviation value at the current temperature according to the color coordinate compensation coefficient and the reference color coordinate at the current temperature.

[0073] In some embodiments, the controller 250 can determine the color coordinate at the current temperature according to the color coordinate deviation value at the current temperature and the reference color coordinate at the current temperature; determine the three stimulus values of the current display picture according to the color coordinate at the current temperature; determine the theoretical three primary color gray scale values according to the three stimulus values of the current display picture; and determine the updated standard gamma table according to the theoretical three primary color gray scale values.

[0074] In some embodiments, the controller 250 can determine the gamma table deviation value according to the color coordinate deviation value at the current temperature; update the standard gamma table according to the gamma table deviation value, and display image content using the updated standard gamma table.

[0075] Figure 5 A flowchart of a display correction method of a display device according to an exemplary embodiment of the present application is shown. In some embodiments, the controller 250 performs the following steps shown in Figure 5

[0076] S501, determine a standard gamma table corresponding to a preset backlight value.

[0077] After the display device is powered on, the preset backlight value can be determined according to the input HDR (High Dynamic Range Imaging) signal or SDR (Software Defination Radio) signal, or can be determined according to the actual use demand of the user.

[0078] After the preset backlight value is determined, the standard gamma table corresponding to the preset backlight value can be obtained. Exemplarily, the specific correspondence between the standard gamma table and the backlight value can be pre-stored in the controller, and when the backlight value is determined, the corresponding standard gamma table can be matched by looking up the table.

[0079] S502, obtain a color coordinate compensation coefficient.

[0080] ​The color coordinate compensation coefficient can be determined by historical data before factory shipment and stored in the controller. After the user powers on the display device, the stored color coordinate compensation coefficient can be automatically called. The present disclosure does not limit the calculation method of the color coordinate compensation coefficient, and a specific method for determining the color coordinate compensation coefficient is exemplarily provided as follows:

[0081] In order to improve the stability of the display, the display can be aged for a preset time, for example, 60 minutes, and then the display is automatically gamma corrected at different backlight brightness, for example, with a step of 100 nits. The purpose of gamma correction for images is to compensate for the characteristics of human vision, so as to maximize the use of data bits or bandwidth representing black and white according to the user's perception of light or black and white, and improve the user's visual experience. The specific steps of gamma correction are well known to those skilled in the art, and the present embodiment does not repeat them.

[0082] Then, the display device subjected to the above automatic gamma correction is turned on, a white card is input, and color coordinates at different backlight values and different temperatures are collected. Table 1 is color coordinate data corresponding to different temperatures at 1000 nits, and Table 2 is color coordinate data corresponding to different temperatures at 100 nits. It should be noted that the present embodiment only exemplarily shows the color coordinate data at 1000 nits and 100 nits, and in the actual collection process, color coordinates at different temperatures corresponding to other backlight values can also be collected, which are not enumerated one by one in the present embodiment.

[0083] Table 1 Color coordinate data corresponding to different temperatures at 1000 nits

[0084]

[0085] Table 2 Color coordinate data corresponding to different temperatures at 100 nits

[0086]

[0087] In Table 1 and Table 2, x and y represent color coordinates (x, y), T (℃) represents the temperature collected by a temperature collection device such as a temperature sensor, Lv-1 represents the preset backlight value of the display device, and Lv-2 represents the measured backlight value of the display device.

[0088] According to the above collected color coordinate data at different backlight values and different temperatures, a compensation coefficient formula is derived by using a simulation algorithm, as follows:

[0089] C(x)=(A+Bx+Cx 2 +Dx 3 ) / 1000

[0090] Wherein, A=1114.5638; B=0.35365; C=-0.110755; D=0.001218

[0091] C(y)=(E+Fy+Gy 2 +Hy 3 ) / 1000

[0092] Wherein, E=1332.017; F=-15.714; G=0.2465; H=-0.001276

[0093] Wherein, C(x) is the compensation coefficient of color coordinate x, and C(y) is the compensation coefficient of color coordinate y.

[0094] S503, determining the color coordinate deviation value at the current temperature according to the color coordinate compensation coefficient.

[0095] The color coordinate compensation coefficient is different, and the color coordinate deviation value is different. If the reference color coordinate at the current temperature is known, the color coordinate deviation value at the current temperature can be determined according to the color coordinate compensation coefficient of the reference color coordinate.

[0096] S504, updating the standard gamma table according to the color coordinate deviation value at the current temperature, and displaying the image content by using the updated standard gamma table.

[0097] The color coordinate deviation value affects the values in the gamma table. If the color coordinate deviation value is obtained, the values in the updated gamma table can be determined according to the relationship between the color coordinate deviation value and the gamma table, so that the image content is displayed by using the updated standard gamma table, thereby compensating for the influence of temperature on display color.

[0098] The embodiment of the application utilizes the rule of the change of the display and the temperature, determines the color coordinate compensation coefficient, determines the color coordinate deviation value at the current temperature by using the color coordinate compensation coefficient, and deduces the gamma table deviation value to update the standard gamma table, and displays the image content by using the updated standard gamma table, thereby compensating for the influence of temperature on the color of the display device, avoiding the problem that the change of temperature leads to inaccurate color display, improving the accuracy of color compensation of the display device, and improving the display effect of the display device.

[0099] In some embodiments, before determining the color coordinate deviation value at the current temperature according to the color coordinate compensation coefficient, it further includes: determining the corresponding standard chroma value and / or standard brightness value according to the preset backlight value; sensing the three primary color gray scale values of the backlight module; determining the real-time chroma value and / or real-time brightness value according to the three primary color gray scale values of the backlight module; adjusting the driving signal of the backlight module according to the difference between the real-time chroma value and the standard chroma value, and / or the difference between the real-time brightness value and the standard brightness value, so that the real-time backlight value of the backlight module is consistent with the preset backlight value.

[0100] Figure 6 FIG. 6 is a flowchart illustrating a display correction method of another display device according to an exemplary embodiment of the present application. In some embodiments, the method is performed in conjunction with the display device 100 shown in FIG. 1. Figure 5 and Figure 6 , Figure 6 In the method shown, S601, S602, S607 and S608 can be understood with reference to S501-S505 in FIG. 5, which will not be described in detail. The controller 250 also performs the following steps shown in FIG. 6: Figure 5 Figure 6

[0101] S603, determining corresponding standard chrominance values and / or standard luminance values according to the preset backlight value.

[0102] Specifically, the controller can pre-store a corresponding relationship between backlight values and standard chrominance values and standard luminance values, and when the set backlight value is determined, at least one of the corresponding standard chrominance values and standard luminance values is determined by looking up a table or the like.

[0103] S604, sensing the three primary color gray scale values of the backlight module.

[0104] Specifically, at least one light sensor can be placed at the position of the backlight module, and the three primary color gray scale values RGB of the backlight module are sensed by the light sensor.

[0105] S605, determining real-time chrominance values and / or real-time luminance values according to the three primary color gray scale values of the backlight module.

[0106] The three stimulus values XYZ are obtained by using the three primary color gray scale values RGB, and are specifically calculated as follows:

[0107] X = L1R + L2G + L3B

[0108] Y = M1R + M2G + M3B

[0109] Z = N1R + N2G + N3B

[0110] ​​Y value in the three-stimulus value is equal to the real-time brightness value. In addition, according to simulation curve fitting calculation, the parameters L1, L2, L3, M1, M2, M3, N1, N2 and N3 are -0.14282, 1.54924, -0.95641, -0.32466, 1.57837, -0.73191, -0.68202, 0.77073 and 0.56332 respectively. It should be noted that the specific calculation method is well known to those skilled in the art, and the embodiments of the present application will not be repeated. Different display devices correspond to different parameters, which can be fitted and calculated based on the model, display performance and other parameters of the display device and stored in the controller. In the calculation, it can be directly called, and the embodiments of the present application are not limited.

[0111] After determining the three-stimulus value XYZ, the color coordinates (x, y) are obtained by the following calculation:

[0112] x = X / (X + Y + Z)

[0113] y = Y / (X + Y + Z)

[0114] The real-time color value CCT is obtained based on the color coordinates (x, y), and the specific calculation method is as follows:

[0115] CCT = P1n^3 + P2n^2 + P3n + 5520.33

[0116] n = (x-a) / (b-y)

[0117] It should be noted that a and b can be determined according to the type of light sensor, and P1, P2, P3, a and b are all constants, and the embodiments of the present application are not limited.

[0118] Through the above calculation formula, the real-time color value and the real-time brightness value can be obtained after determining the three primary color gray scale value.

[0119] S606, according to the difference between the real-time color value and the standard color value, and / or the difference between the real-time brightness value and the standard brightness value, adjust the driving signal of the backlight module, so that the real-time backlight value of the backlight module is consistent with the preset backlight value.

[0120] Specifically, when there is a difference between the real-time color value and the standard color value, and / or there is a difference between the real-time brightness value and the standard brightness value, it means that there is a difference between the current backlight value of the backlight module and the preset backlight value, and the backlight value has changed. In order to ensure the stability of the backlight, the driving signal of the backlight module can be adjusted to make the real-time backlight value of the backlight module reach the preset backlight value.

[0121] In some embodiments, the controller adjusts the driving signal of the backlight module according to the difference between the real-time chroma value and the standard chroma value, and / or the difference between the real-time brightness value and the standard brightness value, in a manner that the real-time backlight value of the backlight module is consistent with the preset backlight value, which can be adjusting the duty cycle of the backlight pulse width modulation signal and / or the backlight driving current according to the difference between the real-time chroma value and the standard chroma value, and / or the difference between the real-time brightness value and the standard brightness value, so that the real-time backlight value of the backlight module is consistent with the preset backlight value.

[0122] Specifically, according to the difference between the real-time chroma value and the standard chroma value, and / or the difference between the real-time brightness value and the standard brightness value, at least one of the duty cycle of the backlight pulse width modulation signal and the backlight driving current needs to be adjusted, so as to update the real-time backlight value to the preset backlight value, and ensure that the backlight value of the display device is in a stable state. For example, when it is necessary to increase the real-time backlight value of the entire backlight module, the backlight pulse width modulation signal can be increased, or when it is necessary to reduce the real-time backlight value of the entire backlight module, the backlight pulse width modulation signal can be reduced. For example, when it is necessary to increase the real-time backlight value of the backlight module, the backlight driving current can be increased, or when it is necessary to reduce the real-time backlight value of the backlight module, the backlight driving current can be reduced.

[0123] It should be noted that the duty cycle of the backlight pulse width modulation signal and the backlight driving current can be adjusted at the same time so that the real-time backlight value of the backlight module is consistent with the preset backlight value, and the present embodiment does not limit the adjustment sequence. Only the duty cycle of the backlight pulse width modulation signal can be adjusted, or only the backlight driving current can be adjusted, which can be set according to the actual use demand of the display device, and the present embodiment does not limit this.

[0124] In some embodiments, the controller adjusts the driving signal of the backlight module according to the difference between the real-time chroma value and the standard chroma value, and / or the difference between the real-time brightness value and the standard brightness value, in a manner that the real-time backlight value of the backlight module is consistent with the preset backlight value, which can be adjusting the duty cycle of the backlight pulse width modulation signal and / or the backlight driving current according to the difference between the real-time chroma value and the standard chroma value, and / or the difference between the real-time brightness value and the standard brightness value, so that the real-time backlight value of the backlight module is consistent with the preset backlight value.

[0125] Exemplarily, the preset backlight value is 100 nits for example, and it is known through table lookup that the standard chroma value corresponding to the 100 nits backlight value is 3000K for example, and the standard brightness value is 500lx for example. When the acquired real-time chroma value is 2500K for example, and the real-time brightness value is 400lx for example, it indicates that the backlight value of the current backlight module is less than the preset backlight value, and the duty cycle of the backlight pulse width modulation signal can be increased, for example, from the current 80% duty cycle to 90% duty cycle, so as to increase the real-time backlight value to reach the preset backlight value. When the acquired real-time chroma value is 3200K for example, and the real-time brightness value is 550lx for example, it indicates that the backlight value of the current backlight module is greater than the preset backlight value, and the duty cycle of the backlight pulse width modulation signal can be reduced, for example, from the current 80% duty cycle to 70% duty cycle, so as to make the real-time backlight value of the backlight module consistent with the preset backlight value.

[0126] In addition, the real-time backlight value of the backlight module can also be made consistent with the preset backlight value by adjusting the backlight driving current. Exemplarily, the preset backlight value is 100 nits for example, and it is known through table lookup that the standard chroma value corresponding to the 100 nits backlight value is 3000K for example, and the standard brightness value is 500lx for example. When the acquired real-time chroma value is 2500K for example, and the real-time brightness value is 400lx for example, it indicates that the backlight value of the current backlight module is less than the preset backlight value, and the backlight driving current can be increased, for example, the driving current of each light-emitting lamp bead is increased from the current 10mA to 15mA, so as to increase the real-time backlight value of the backlight module to the preset backlight value of 100 nits for example. When the acquired real-time chroma value is 3200K for example, and the real-time brightness value is 550lx for example, it indicates that the backlight value of the current backlight module is greater than the preset backlight value, and the backlight driving current can be reduced, for example, the driving current of each light-emitting lamp bead is reduced from the current 10mA to 8mA, so as to reduce the real-time backlight value of the backlight module to the preset backlight value of 100 nits for example.

[0127] It should be noted that, in order to make the real-time backlight value of the backlight module consistent with the preset backlight value, the duty cycle of the backlight pulse width modulation signal can be adjusted only, the backlight driving current can be adjusted only, or both the backlight pulse width modulation signal and the backlight driving current can be adjusted. The order of adjusting the backlight pulse width modulation signal and the backlight driving current can be set according to the actual use of the display device, and the embodiments of the present application do not limit this.

[0128] In some embodiments, the controller can also control the sensing of the three primary color gray scale values at multiple different positions of the display, adjust the driving signal of the backlight module at the corresponding position according to the difference between the real-time chrominance value and the standard chrominance value at the corresponding position of the backlight module, and / or the difference between the real-time luminance value and the standard luminance value at the corresponding position of the backlight module, so as to make the real-time backlight value of the backlight module consistent with the preset backlight value.

[0129] Specifically, in order to sense the three primary color gray scale values RGB of the backlight module of the display, multiple different light sensors are arranged at multiple different positions of the backlight module for testing the three primary color gray scale values RGB. For example, for a display device with a 4K resolution, light sensors can be arranged at the coordinate positions (3800, 2100), (3800, 100), (100, 2100) and (100, 100) of the backlight module, respectively, so that the light sensors can sense the luminance of the backlight module and obtain the three primary color gray scale values RGB of the four coordinate positions of the backlight module, and determine the real-time chrominance value and / or the real-time luminance value based on the three primary color gray scale values of the backlight module. The specific calculation method can be understood with reference to the above embodiments, which will not be described here again.

[0130] For example, when there is a difference between the real-time luminance value and the standard chrominance value at the multiple different positions of the backlight module, and / or there is a difference between the real-time luminance value and the standard luminance value at the multiple different positions of the backlight module, the backlight value of the real-time backlight module can be adjusted as a whole, i.e., the backlight pulse width modulation signal is adjusted, so as to adjust the backlight value of the entire backlight module. Since the difference between the real-time backlight value and the preset backlight value is different for different partitions, adjusting the backlight pulse width modulation signal of the entire backlight module cannot make the real-time backlight value of different partitions reach the preset backlight value. In order to accurately adjust the backlight value of different partitions of the backlight module, the real-time chrominance value and / or the real-time luminance value obtained by the light sensors at multiple different positions can be used to adjust the backlight driving current of the corresponding position in different partitions, so that the real-time backlight value of the backlight module in each partition is consistent with the preset backlight value.

[0131] In addition, it can also be determined whether the real-time chrominance value of multiple partitions exceeds the preset chrominance value, and / or whether the real-time luminance value exceeds the preset luminance value. For example, when the real-time luminance value of the first position and the second position corresponding to the four light sensors exceeds the preset luminance value, and the real-time luminance value of the third position and the fourth position is less than the preset luminance value, the partition adjustment is performed, the driving current of the backlight module corresponding to the first position and the second position is increased, and the driving current of the backlight module corresponding to the third position and the fourth position is decreased, so that the real-time backlight value of the backlight module is equal to the preset backlight value.

[0132] It should be noted that the number of light sensors set can be equal to the number of partitions of the backlight module, one light sensor can be set at a plurality of partition positions of the backlight module, or a plurality of light sensors can be set at one partition position of the backlight module, and the embodiments of the present application do not limit this.

[0133] In some embodiments, the manner in which the controller senses the three-primary-color gray scale values of the backlight module can be: determining whether the current boot-up running time is greater than a preset time threshold; if the current boot-up running time is greater than the preset time threshold, sensing the three-primary-color gray scale values of the backlight module at a first time interval, otherwise sensing the three-primary-color gray scale values of the backlight module at a second time interval; wherein the first time interval is greater than the second time interval.

[0134] Specifically, the backlight value changes rapidly within the preset time threshold in the boot-up of the display device, and after exceeding the preset time, the operation of the display device tends to be stable, and the change rate of the backlight value decreases. Therefore, in order to improve the accuracy of sensing the three-primary-color gray scale values of the backlight module of the display, the three-primary-color gray scale values of the backlight module can be sensed at different time intervals. For example, when the current display device boot-up time is greater than the preset time threshold, for example, 30 minutes, the three-primary-color gray scale values of the backlight module are sensed at a first time interval, for example, 5 minutes, and when the current display device boot-up time is within the preset time threshold, for example, 30 minutes, the three-primary-color gray scale values of the backlight module are sensed at a second time interval, for example, 1 minute.

[0135] It should be noted that the specific values of the preset time threshold, the first time interval and the second time interval can be set according to the actual use of the display device, and the embodiments of the present application do not limit this.

[0136] In some embodiments, the manner in which the color coordinate deviation value at the current temperature is determined according to the color coordinate compensation coefficient can be:

[0137] The color coordinate deviation value at the current temperature is determined according to the color coordinate compensation coefficient and the reference color coordinate at the current temperature.

[0138] Specifically, the color coordinate compensation coefficient is stored in the controller, which can be called at any time when the user uses the display device for color compensation, and the color coordinate deviation value at the current temperature can be determined by the color coordinate compensation coefficient. For example, under 1000 nits of backlight, the reference color coordinate at a temperature of 25°C is, for example, (0.322, 0.331), the compensation coefficient C(x) of the color coordinate x is, for example, 1.1, and the compensation coefficient C(y) of the color coordinate y is, for example, 1.2, then the color coordinate at 25°C should be (0.354, 0.397), and the color coordinate deviation value is (0.032, 0.066).

[0139] In some embodiments, the controller can update the standard gamma table according to the color coordinate deviation value at the current temperature in the following manner: determining the color coordinate at the current temperature according to the color coordinate deviation value at the current temperature and the reference color coordinate at the current temperature; determining the tristimulus value of the current display picture according to the color coordinate at the current temperature; determining the theoretical three-primary color gray scale value according to the tristimulus value of the current display picture; and determining the updated standard gamma table according to the theoretical three-primary color gray scale value.

[0140] Specifically, the color coordinate at the current temperature is the sum of the color coordinate deviation value at the current temperature and the reference color coordinate at the current temperature, and the tristimulus value XYZ of the current display picture is determined by using the calculated color coordinate (x, y) at the current temperature. According to the principle of color science, the conversion relationship between the color coordinate (x, y) and the tristimulus value XYZ is calculated according to the following calculation formula:

[0141] x = X / (X+Y+Z)

[0142] y = Y / (X+Y+Z)

[0143] Then the tristimulus value XYZ can be obtained as follows:

[0144] X = x / y*Y

[0145] Y = Y = Lv

[0146] Z = (1-x-y) / y*Y

[0147] Wherein, Lv is the current backlight value.

[0148] The tristimulus value XYZ is converted into the theoretical three-primary color gray scale value RGB, and the specific calculation formula is as follows:

[0149]

[0150] The parameters in the calculation matrix are all constants, and the specific calculation method is well known to those skilled in the art, which will not be described here.

[0151] The theoretical three-primary color gray scale value RGB is converted into the value corresponding to each gray scale (r, g, b) in the gamma table, and the specific calculation formula is as follows:

[0152]

[0153]

[0154] The value corresponding to each gray scale (r, g, b) in the gamma table is updated to the value corresponding to each gray scale (r1, g1, b1) in the standard gamma table, and the updated standard gamma table is used to display image content, so as to correct the color and compensate for the influence of temperature on the color of the display device.

[0155] In some embodiments, the controller can also update the standard gamma table according to the color coordinate deviation value at the current temperature in the following manner: determine a gamma table deviation value according to the color coordinate deviation value at the current temperature; update the standard gamma table according to the gamma table deviation value, and display the image content using the updated standard gamma table.

[0156] Specifically, based on the color coordinate deviation value at the current temperature, the conversion relationship between the color coordinates (x, y) and the tristimulus values XYZ can be used to obtain the tristimulus value XYZ deviation value ΔXYZ, and the tristimulus value XYZ deviation value ΔXYZ can be converted into the theoretical three-primary color gray scale value RGB deviation value ΔRGB. The theoretical three-primary color gray scale value RGB deviation value ΔRGB is converted into the difference value (△r, △g, △b) of the numerical values corresponding to each gray scale in the gamma table. The difference value (△r, △g, △b) of the numerical values corresponding to each gray scale in the gamma table is summed with the numerical values (r1, g1, b1) corresponding to each gray scale in the standard gamma table, and the numerical values (r, g, b) corresponding to each gray scale in the updated standard gamma table are obtained. The image content is displayed using the updated standard gamma table to achieve color correction. It should be noted that the specific calculation formula can be understood with reference to the above-mentioned embodiments, and will not be described here.

[0157] Figure 7 A specific flowchart of a display correction method of a display device provided by the embodiments of the present application is shown in FIG. 7. Figure 7 The display correction method of the display device includes the following steps.

[0158] S701, turn on.

[0159] S702, set a preset backlight value adaptively according to user settings or signal information.

[0160] S703, determine a corresponding standard gamma table according to the preset backlight value.

[0161] S704, determine whether the preset backlight value has changed; if yes, execute step 703; if no, execute step 705.

[0162] S705, obtain the temperature of the display.

[0163] S706, determine whether the temperature of the display has changed; if yes, execute step 705; if no, execute step 707.

[0164] S707, determine a color coordinate compensation coefficient according to different backlight values and the temperature of the display.

[0165] S708, determine a color coordinate deviation value at the current temperature according to the color coordinate compensation coefficient.

[0166] S709, determining the color coordinate at the current temperature according to the color coordinate deviation value at the current temperature and the reference color coordinate at the current temperature.

[0167] S710, determining the tristimulus value of the current display picture according to the color coordinate at the current temperature.

[0168] S711, determining the theoretical three-primary color gray scale value according to the tristimulus value of the current display picture.

[0169] S712, determining the updated standard gamma table according to the theoretical three-primary color gray scale value, and displaying the image content by using the updated standard gamma table.

[0170] It should be noted that after displaying the image content by using the updated standard gamma table, it is necessary to continue to judge whether the preset backlight value changes, and if the preset backlight value changes, the standard gamma table is continuously updated.

[0171] Figure 8 The specific flowchart of another display correction method of the display device provided by the embodiment of the present application is combined with Figure 7 and Figure 8 , Figure 8 The method shown in the method can be understood with reference to S703-S712 in Figure 7 , and will not be described here. The difference is that S801-S812 can also be included before S813. The display correction method of the display device specifically includes:

[0172] S801, starting up.

[0173] S802, adaptively setting the preset backlight value according to user settings or signal information.

[0174] S803, determining the corresponding standard chrominance value and / or standard brightness value according to the preset backlight value.

[0175] S804, judging whether the preset backlight value changes; if yes, executing step 803; if no, executing step 805.

[0176] S805, judging whether the current startup running time is greater than a preset time threshold; if yes, executing step 806; if no, executing step 807.

[0177] S806, sensing the three-primary color gray scale value of the backlight module at a second time interval.

[0178] S807, sensing the three-primary color gray scale value of the backlight module at a first time interval.

[0179] S808, determining the real-time chrominance value and / or real-time brightness value according to the three-primary color gray scale value of the backlight module.

[0180] S809, judging whether there is a difference between the real-time chrominance value and the standard chrominance value, and / or whether there is a difference between the real-time luminance value and the standard luminance value; if yes, executing step 810; if no, executing step 804.

[0181] S810, judging whether the real-time chrominance values of the multiple positions of the backlight module are all deviated in the same direction from the standard chrominance values, and / or whether the real-time luminance values are all deviated in the same direction from the standard luminance values; if yes, executing step 811; if no, executing step 812.

[0182] S811, adjusting the duty cycle of the backlight pulse width modulation signal to make the real-time backlight value of the backlight module consistent with the preset backlight value.

[0183] S812, adjusting the backlight current of each position respectively to make the real-time backlight value of each position of the backlight module consistent with the preset backlight value.

[0184] S813, determining the corresponding standard gamma table according to the preset backlight value.

[0185] S814, obtaining a color coordinate compensation coefficient.

[0186] S815, determining a color coordinate deviation value at the current temperature according to the color coordinate compensation coefficient.

[0187] S816, updating the standard gamma table according to the color coordinate deviation value at the current temperature, and displaying image content by using the updated standard gamma table.

[0188] Figure 9 Another specific flowchart of the display correction method of the display device is provided for the embodiments of the present application, which is combined with Figure 7 and Figure 9 , Figure 9 The method shown in the embodiments can be understood with reference to S701-708 in the method shown in Figure 7 , and thus will not be described here. The display correction method of the display device comprises:

[0189] S901, starting up.

[0190] S902, adaptively setting a preset backlight value according to user settings or signal information.

[0191] S903, determining the corresponding standard gamma table according to the preset backlight value.

[0192] S904, judging whether the preset backlight value changes; if yes, executing step 903; if no, executing step 905.

[0193] S905, obtaining the temperature of the display.

[0194] S906, judging whether the temperature of the display changes; if yes, executing step 905; if no, executing step 907.

[0195] S907, determining the color coordinate compensation coefficient according to the different backlight values and the temperature of the display.

[0196] S908, determining the color coordinate deviation value at the current temperature according to the color coordinate compensation coefficient.

[0197] S909, determining the color coordinate deviation value at the current temperature according to the color coordinate deviation value at the current temperature.

[0198] S910, determining the three-stimulus value deviation value of the current display picture according to the color coordinate deviation value at the current temperature.

[0199] S911, determining the theoretical three-primary color gray scale value deviation value according to the three-stimulus value deviation value of the current display picture.

[0200] S912, determining the updated standard gamma table according to the theoretical three-primary color gray scale value deviation value, and displaying the image content by using the updated standard gamma table.

[0201] As can be seen from the above embodiments, the display device and the display correction method of the display device provided by the embodiments of the present application make use of the rule of the change of the display and the temperature, determine the color coordinate compensation coefficient, determine the color coordinate deviation value at the current temperature by using the color coordinate compensation coefficient, derive the gamma table deviation value, update the standard gamma table, and display the image content by using the updated standard gamma table, thereby making up for the influence of the temperature on the color of the display device, improving the accuracy of the color compensation of the display device, and improving the display effect of the display device.

[0202] In a specific implementation, the present application further provides a computer storage medium, wherein the computer storage medium can store a program, and the program can include some or all steps in the embodiments of the method provided by the present application when executed. The storage medium can be a magnetic disc, an optical disc, a read-only memory (ROM) or a random access memory (RAM), etc.

[0203] In a specific implementation, the present application further provides a device, which includes a processor and a memory, Figure 10 Fig. 1 is a structural schematic diagram of a device according to an exemplary embodiment of the present application. As shown in Fig. 1, the device includes a processor 10 and a memory 20. Figure 10As shown, the device includes a processor 1001 and a memory 1002. The processor 1001 executes the steps of the display correction method of the display device as described in the above embodiment by calling the program or instructions stored in the memory 1002. Therefore, it has the beneficial effects of the above embodiment, which will not be repeated here.

[0204] Specifically, such as Figure 10 As shown, the device can be configured to include at least one processor 1001, at least one memory 1002, and at least one communication interface 1003. The various components within the device are coupled together via a bus system 1004. The communication interface 1003 is used for information transmission with external devices. It is understood that the bus system 1004 is used to implement communication between these components. In addition to a data bus, the bus system 1004 also includes a power bus, a control bus, and a status signal bus. However, for clarity, ... Figure 10 The general labeled all buses as Bus System 1004.

[0205] It is understood that the memory 1002 in this embodiment may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. In some embodiments, the memory 1002 stores the following elements: executable units or data structures, or subsets thereof, or extended sets thereof, operating systems, and applications. In this embodiment of the invention, the processor 1001 executes the steps of various embodiments of the display calibration method for the display device provided in this embodiment of the invention by calling the programs or instructions stored in the memory 1002.

[0206] The display calibration method for the display device provided in this embodiment of the invention can be applied to, or implemented by, the processor 1001. The processor 1001 can be an integrated circuit chip with signal processing capabilities. During implementation, each step of the above method can be completed by integrated logic circuits in the hardware of the processor 1001 or by instructions in software form. The processor 1001 can be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. The general-purpose processor can be a microprocessor or any conventional processor.

[0207] The steps provided by the embodiments of the present application can be directly embodied as hardware code processing for execution, or be executed by a combination of hardware and software units in the code processing. The software units can be located in random access memories, flash memories, read-only memories, programmable read-only memories, or electrically erasable programmable memories, registers, and other mature storage media in the field. The storage media are located in the storage 1002, and the processor 1001 reads information in the storage 1002 to complete the steps of the method in combination with hardware.

[0208] The device can also include one physical component or a plurality of physical components to generate instructions according to the processor 1001 in executing the display correction method of the display device provided by the embodiments of the present application. Different physical components can be arranged in the device or outside the device, such as a cloud server. Each physical component cooperates with the processor 1001 and the storage 1002 to realize the function of the device in the embodiments.

[0209] Those skilled in the art can clearly understand that the technology in the embodiments of the present application can be realized by means of software and necessary general hardware platforms. Based on such understanding, the technical solutions in the embodiments of the present application can be embodied in the form of a software product, which can be stored in a storage medium, such as a ROM / RAM, a magnetic disk, an optical disk, etc., and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the method of each embodiment or some parts of the embodiments of the present application.

[0210] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

[0211] In order to facilitate explanation, the above description has been made in combination with specific embodiments. However, the above exemplary discussion is not intended to exhaust or limit the embodiments to the specific forms disclosed above. Various modifications and variations can be derived according to the above teachings. The selection and description of the above embodiments are for better explanation of principles and practical applications, so that those skilled in the art can better use the embodiments and various different modified embodiments suitable for specific use considerations.

Claims

1. A display device, characterized by comprising: The application relates to a display device, comprising: a display configured to display image content; a backlight module configured to provide backlight light source for the display; a controller configured to: determine a standard gamma table corresponding to a preset backlight value; obtain a color coordinate compensation coefficient, wherein the color coordinate compensation coefficient is determined according to color coordinate data corresponding to different backlight values and different temperatures; determine a color coordinate deviation value at a current temperature according to the color coordinate compensation coefficient; update the standard gamma table according to the color coordinate deviation value at the current temperature, and display image content by using the updated standard gamma table.

2. The display device of claim 1, wherein, The controller is further configured to: determine corresponding standard chrominance values and / or standard brightness values according to the preset backlight value; sense three primary color gray scale values of the backlight module; determine real-time chrominance values and / or real-time brightness values according to the three primary color gray scale values of the backlight module; adjust a driving signal of the backlight module according to a difference between the real-time chrominance values and the standard chrominance values, and / or a difference between the real-time brightness values and the standard brightness values, so that real-time backlight values of the backlight module are consistent with the preset backlight value.

3. The display device of claim 2, wherein, The controller is further configured to: adjust a duty cycle of a backlight pulse width modulation signal and / or a backlight driving current according to a difference between the real-time chrominance values and the standard chrominance values, and / or a difference between the real-time brightness values and the standard brightness values, so that real-time backlight values of the backlight module are consistent with the preset backlight value.

4. The display device of claim 3, wherein, The controller is further configured to: if the real-time chrominance values are greater than the standard chrominance values, and / or the real-time brightness values are greater than the standard brightness values, decrease the duty cycle of the backlight pulse width modulation signal and / or the backlight driving current, so that the real-time backlight values of the backlight module are consistent with the preset backlight value; if the real-time chrominance values are less than the standard chrominance values, and / or the real-time brightness values are less than the standard brightness values, increase the duty cycle of the backlight pulse width modulation signal and / or the backlight driving current, so that the real-time backlight values of the backlight module are consistent with the preset backlight value.

5. The display device according to any of claims 2-4, characterized in that, The controller is further configured to: sense three primary color gray scale values at multiple different positions of the backlight module; adjust driving signals of the backlight module at corresponding positions respectively according to differences between the real-time chrominance values and the standard chrominance values at the multiple different positions of the backlight module, and / or differences between the real-time brightness values and the standard brightness values at the multiple different positions of the backlight module, so that the real-time backlight values of the backlight module are consistent with the preset backlight value.

6. The display device of claim 2, wherein, The controller is further configured to: determine whether a current running time after starting up is greater than a preset time threshold value; if the current running time after starting up is greater than the preset time threshold value, sense the three primary color gray scale values of the backlight module at a first time interval, otherwise sense the three primary color gray scale values of the backlight module at a second time interval; wherein the first time interval is greater than the second time interval.

7. The display device of claim 1, wherein, The controller is further configured to: determine the color coordinate deviation value at the current temperature according to the color coordinate compensation coefficient and a reference color coordinate at the current temperature.

8. The display device of claim 1, wherein, The controller is further configured to: determine the color coordinate at the current temperature according to the color coordinate deviation value at the current temperature and the reference color coordinate at the current temperature; determine the tristimulus value of the current display picture according to the color coordinate at the current temperature; determine the theoretical three-primary-color gray scale value according to the tristimulus value of the current display picture; determine the updated standard gamma table according to the theoretical three-primary-color gray scale value.

9. The display device of claim 1, wherein, The controller is further configured to: determine the gamma table deviation value according to the color coordinate deviation value at the current temperature; update the standard gamma table according to the gamma table deviation value, and display image content by using the updated standard gamma table.

10. A display correction method of a display device, characterized by, The method is applied to a display device, and the method determine a standard gamma table corresponding to a preset backlight value; obtain a color coordinate compensation coefficient; wherein the color coordinate compensation coefficient is determined according to color coordinate data corresponding to different backlight values and different temperatures; determine a color coordinate deviation value at a current temperature according to the color coordinate compensation coefficient; determine a gamma table deviation value according to the color coordinate deviation value at the current temperature; update the standard gamma table according to the gamma table deviation value, and display image content by using the updated standard gamma table.

Images