WO2022166567A1 - Dispositif d'affichage et procédé de réglage de paramètre d'affichage - Google Patents

Dispositif d'affichage et procédé de réglage de paramètre d'affichage Download PDF

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Publication number
WO2022166567A1
WO2022166567A1 PCT/CN2022/072289 CN2022072289W WO2022166567A1 WO 2022166567 A1 WO2022166567 A1 WO 2022166567A1 CN 2022072289 W CN2022072289 W CN 2022072289W WO 2022166567 A1 WO2022166567 A1 WO 2022166567A1
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WIPO (PCT)
Prior art keywords
display
brightness
target
color temperature
interval
Prior art date
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PCT/CN2022/072289
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English (en)
Chinese (zh)
Inventor
何营昊
王英俊
于新磊
刘芳
张瑞吉
Original Assignee
海信视像科技股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Priority claimed from CN202110143233.7A external-priority patent/CN112908273A/zh
Priority claimed from CN202111170228.1A external-priority patent/CN115953965A/zh
Priority claimed from CN202111461428.2A external-priority patent/CN116229906A/zh
Application filed by 海信视像科技股份有限公司 filed Critical 海信视像科技股份有限公司
Publication of WO2022166567A1 publication Critical patent/WO2022166567A1/fr

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/02—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the way in which colour is displayed
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/10—Intensity circuits

Definitions

  • the present application relates to display device technology, and in particular, to a display device and a display parameter adjustment method.
  • the display device can also apply many intelligent control technologies, for example, the display device has an automatic backlight adjustment function.
  • the display device turns on the automatic backlight adjustment function, it can sense the brightness change of the external environment, and automatically adjust the current backlight brightness to the target backlight brightness corresponding to the environmental brightness, so as to adapt to the brightness of the external environment and improve the user's ability to operate under different ambient light conditions. viewing experience.
  • Some embodiments of the present application provide a display device and a display parameter adjustment method, wherein the display device includes a display, a light sensor, and a controller.
  • the display is configured to display the target image;
  • the light sensor is configured to collect the ambient color temperature of the environment where the display device is located;
  • the controller is configured to perform the following steps: acquiring the target ambient color temperature collected by the light sensor; acquiring the corresponding relationship according to the preset display parameters
  • the target display parameters corresponding to the target ambient color temperature, and the display parameter correspondences represent respective display parameters corresponding to different ambient color temperatures; the display parameters of the target image are adjusted to the target display parameters.
  • the controller is configured to: convert the target ambient color temperature into a display color temperature in the step of acquiring the target display parameter corresponding to the target ambient color temperature according to the preset display parameter correspondence; Determine the target color temperature interval in which the display color temperature is located; obtain the display parameter corresponding to the target color temperature interval according to the display parameter correspondence, and use it as the target display parameter.
  • the controller is configured to: after performing the step of converting the target ambient color temperature into a display color temperature, determine whether the display color temperature is within a preset color temperature threshold; The steps of displaying the target color temperature range corresponding to the color temperature are described; if not, no processing is performed.
  • the controller is configured to: control the display to display an image function interface in response to an instruction input by a user indicating to display an image function interface, the image function interface includes several functions including an ambient color temperature adjustment function. an image function option; when a selection instruction for selecting the ambient color temperature adjustment function input by the user in the image function interface is detected, the step of determining the target display parameter corresponding to the target ambient color temperature is performed.
  • the controller is configured to: after performing the step of acquiring the target ambient color temperature collected by the light sensor, in response to an instruction input by a user to instruct to turn on the ambient brightness adjustment function, convert the target ambient color temperature to ambient brightness; determine the target brightness interval where the ambient brightness is located; when the display is a first-type display, obtain a target PLC curve corresponding to the target brightness interval and adjust the backlight brightness of the display device according to the target PLC curve; when When the display is the second type of display, obtain the target brightness corresponding to the target brightness interval and adjust the backlight brightness of the display device to the target brightness; obtain the target gamma curve corresponding to the target brightness interval The horse curve adjusts the brightness of each pixel in the target image.
  • the controller is configured to: in executing the step of acquiring the PLC curve corresponding to the target brightness interval; acquiring an initial PLC curve of the display device; acquiring the PLC curve according to a preset PLC curve offset relationship The PLC curve offset corresponding to the target brightness interval; the initial PLC curve is adjusted according to the PLC curve offset to obtain the target PLC curve.
  • the controller is configured to: in performing the step of acquiring a target gamma curve corresponding to the target brightness interval; acquiring an initial gamma curve of the display device; offsetting according to a preset gamma curve The gamma curve offset corresponding to the target brightness interval is obtained in the relationship; the initial gamma curve is adjusted according to the gamma curve offset to obtain the target gamma curve.
  • the controller is configured to: after performing the step of determining a target color temperature interval in which the display color temperature is located, determine whether the target brightness interval is a preset brightness interval; if the target brightness interval The interval is a preset brightness interval, then the display parameter corresponding to the first color temperature interval is used as the target display parameter, and the step of adjusting the display parameter of the target image to the target display parameter is performed; if the target brightness interval is not preset the brightness interval, the step of obtaining the display parameters corresponding to the target color temperature interval according to the corresponding relationship of the display parameters is performed.
  • the controller is configured to: after performing the step of determining a target color temperature interval in which the display color temperature is located, determine whether the target brightness interval is a preset brightness interval; if the target brightness interval The interval is a preset brightness interval, then when the display is the first type of display, obtain the first PLC curve corresponding to the first brightness interval and adjust the backlight brightness of the display device according to the first PLC curve, and, when the display is the first In the case of the second type of display, the first brightness corresponding to the first brightness interval is obtained and the backlight brightness of the display device is adjusted to the first brightness; the first gamma curve corresponding to the first brightness interval is obtained and based on the first gamma The curve adjusts the brightness of each pixel in the target image.
  • Some embodiments of the present application provide a display parameter adjustment method, which includes: acquiring a target ambient color temperature collected by a light sensor; acquiring a target display parameter corresponding to the target ambient color temperature according to a preset corresponding relationship of display parameters, and the corresponding relationship of the display parameters Indicates the respective display parameters corresponding to different ambient color temperatures; the display parameters of the target image are adjusted to the target display parameters.
  • Some embodiments of the present application provide a display device, including: a display for displaying a user interface; a controller connected to the display, the controller being configured to: receive a user signaling for adjusting backlight brightness; If it is currently in a non-light-sensing mode, enable the user adjustment mode and perform user adjustment of the backlight brightness of the display; if it is currently in a light-sensing mode, turn on the light-sensing gainer based on the light-sensing mode mode, and adjust the light gain parameter of the display in the light gain sub-mode.
  • a first memory is further included, the first memory is configured to: store the parameters for enabling a user adjustment mode and performing user adjustment of the display backlight brightness in the first memory; When the display device is powered on, the current backlight brightness of the display device is adjusted according to the user adjustment parameters stored in the first memory.
  • a second memory is further included, the second memory is configured to: store the light sensitivity gain parameter adjusted in the light sensitivity gain sub-mode in the second memory; when the display device is powered on At the time, the light gain of the display device is adjusted according to the light gain parameter stored in the second memory.
  • Some embodiments of the present application provide a display device, including: a processor configured to: acquire a brightness value of ambient light collected by an ambient light sensor; determine a first brightness interval in which the brightness value is located; A first gamma curve corresponding to a brightness interval adjusts the brightness of each pixel in the to-be-displayed image; the display is configured to display the to-be-displayed image adjusted by the processor.
  • the first gamma curve is obtained by adjusting on the basis of an original gamma curve corresponding to the display device;
  • the original gamma curve includes a plurality of sub-segments, and the first sub-segment has a first The endpoint corresponds to the first offset value in the first brightness interval;
  • the second endpoint of the first subsection corresponds to the second offset value in the first brightness interval;
  • the first subsection is the any subsection of the plurality of subsections;
  • the first endpoint of the first subsection of the first gamma curve is a first offset at the first endpoint of the first subsection of the original gamma curve obtained after adjusting the value;
  • the second end point of the first subsection of the first gamma curve is obtained after the second end point of the first subsection of the original gamma curve is adjusted by the second offset value ;
  • the first subsection of the first gamma curve satisfies a preset functional relationship.
  • the preset functional relationship is any one of a linear function, an exponential function, and a quadratic function.
  • the processor is further configured to: adjust the brightness value of the display according to the first PLC curve corresponding to the first brightness interval; wherein the PLC curves corresponding to different brightness intervals are different.
  • the first PLC curve is obtained by adjusting on the basis of an original PLC curve corresponding to the display device; the original PLC curve includes a plurality of sub-segments, and the second sub-segment is at the first brightness level.
  • the interval corresponds to the third offset value; the second subsection is any subsection of the plurality of subsections; the second subsection of the first PLC curve is the second subsection of the original PLC curve After adjustment of the third offset value.
  • FIG. 1 is a schematic diagram of an operation scenario between a display device and a control apparatus according to some embodiments of the present application;
  • FIG. 2 is a block diagram of a hardware configuration of a display device 200 according to some embodiments of the present application
  • control device 100 is a block diagram of the hardware configuration of the control device 100 according to some embodiments of the present application.
  • FIG. 4 is a schematic diagram of software configuration in the display device 200 according to some embodiments of the present application.
  • FIG. 5 is a schematic diagram of displaying an icon control interface of an application in a display device 200 according to some embodiments of the present application;
  • FIG. 6 is a schematic diagram of displaying confirmation information of an ambient color temperature adjustment mode in a display according to some embodiments of the present application.
  • FIG. 7 is an interaction flowchart of each component of a display device according to some embodiments of the present application.
  • FIG. 8 is a schematic diagram of a color temperature abnormality prompt interface according to some embodiments of the present application.
  • FIG. 9 is a schematic diagram of a display device adjusting a white balance value according to some embodiments of the present application.
  • FIG. 10 is a schematic diagram of an image function interface according to some embodiments of the present application.
  • FIG. 11 is a schematic diagram of a display device automatically adjusting brightness according to some embodiments of the present application.
  • FIG. 12 is a schematic diagram of an interface for prompting abnormal ambient brightness according to some embodiments of the present application.
  • FIG. 13 is a flow chart of adjusting the brightness of different types of displays by a display device according to some embodiments of the present application.
  • FIG. 14 is a flowchart of adjusting backlight brightness of a display device according to some embodiments of the present application.
  • 15 is a flowchart of adjusting the brightness of a target image according to some embodiments of the present application.
  • 16 is a flowchart of adjusting backlight brightness of a display device according to some embodiments of the present application.
  • 17 is a schematic diagram of a display device adjusting brightness according to some embodiments of the present application.
  • 19A is a comparison diagram of the first subsection of the original gamma curve and the first subsection of the first gamma curve according to some embodiments of the present application;
  • 19B is a comparison diagram of the original gamma curve and the first gamma curve according to some embodiments of the present application.
  • 20A is a comparison diagram of the second subsection of the original PLC curve and the second subsection of the first PLC curve according to some embodiments of the present application;
  • 20B is a comparison diagram of the original PLC curve and the first PLC curve according to some embodiments of the present application.
  • FIG. 21A is a schematic diagram illustrating the correspondence between the UI value of the screen brightness and the PWM value according to some embodiments of the present application.
  • FIG. 21B is a schematic diagram illustrating the correspondence between the gain value of the light-sensing gain and the UI value according to some embodiments of the present application.
  • 21C is a schematic diagram of the change of PWM value after gain value gain in light-sensing gain mode according to some embodiments of the present application.
  • FIG. 22 is a schematic flowchart of a user backlight brightness adjustment process in a light sensing mode according to some embodiments of the present application.
  • FIG. 1 is a schematic diagram of an operation scenario between a display device and a control device according to some embodiments of the present application.
  • a user can operate the display device 200 through a mobile terminal 300 and the control device 100 .
  • the control apparatus 100 may be a remote control, and the communication between the remote control and the display device includes infrared protocol communication, Bluetooth protocol communication, and wireless or other wired ways to control the display device 200 .
  • the user can control the display device 200 by inputting user instructions through keys on the remote control, voice input, control panel input, and the like.
  • mobile terminals, tablet computers, computers, notebook computers, and other smart devices may also be used to control the display device 200 .
  • the mobile terminal 300 may install a software application with the display device 200 to implement connection communication through a network communication protocol, so as to achieve the purpose of one-to-one control operation and data communication.
  • the audio and video content displayed on the mobile terminal 300 may also be transmitted to the display device 200 to realize a synchronous display function.
  • the display device 200 also performs data communication with the server 400 through various communication methods.
  • the display device 200 may be allowed to communicate via local area network (LAN), wireless local area network (WLAN), and other networks.
  • the server 400 may provide various contents and interactions to the display device 200 .
  • the display device 200 may be a liquid crystal display, an OLED display, or a projection display device.
  • the display device 200 may additionally provide an intelligent network television function that provides a computer-supported function in addition to the function of broadcasting and receiving television.
  • FIG. 2 exemplarily shows a configuration block diagram of the control apparatus 100 according to an exemplary embodiment.
  • the control device 100 includes a controller 110 , a communication interface 130 , a user input/output interface 140 , a memory, and a power supply.
  • the control device 100 can receive the user's input operation instruction, and convert the operation instruction into an instruction that the display device 200 can recognize and respond to, and play an intermediary role between the user and the display device 200 .
  • the communication interface 130 is used for external communication, and includes at least one of a WIFI chip, a Bluetooth module, NFC or an alternative module.
  • the user input/output interface 140 includes at least one of a microphone, a touchpad, a sensor, a key or an alternative module.
  • FIG. 3 is a block diagram showing a hardware configuration of the display apparatus 200 according to an exemplary embodiment.
  • 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, an external memory, a power supply, and a user interface 280. at least one of.
  • the controller includes a central processing unit, a video processing unit, an audio processing unit, a graphics processing unit, a RAM, a ROM, and a first interface to an nth interface for input/output.
  • the display 260 may be at least one of a liquid crystal display, an OLED display, a touch display, and a projection display, and may also be a projection device and a projection screen.
  • the tuner-demodulator 210 receives broadcast television signals through wired or wireless reception, and demodulates audio and video signals, such as EPG data signals, from a plurality of wireless or wired broadcast television signals.
  • the detector 230 is used to collect external environment or external interaction signals.
  • the controller 250 and the tuner 210 may be located in different separate devices, that is, the tuner 210 may also be located in an external device of the main device where the controller 250 is located, such as an external set-top box.
  • the controller 250 controls the operation of the display device and responds to user operations.
  • the controller 250 controls the overall operation of the display apparatus 200 .
  • a user may input a user command on 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).
  • GUI graphical user interface
  • the user may input a user command by inputting a specific sound or gesture, and the user input interface recognizes the sound or gesture through a sensor to receive the user input command.
  • a "user interface” is a medium interface for interaction and information exchange between an application program or an operating system and a user, which enables conversion between an internal form of information and a form acceptable to the user.
  • the commonly used form of user interface is Graphical User Interface (GUI), which refers to a user interface related to computer operations displayed in a graphical manner. It can be an icon, window, control and other interface elements displayed on the display screen of the electronic device, wherein the control can include icons, buttons, menus, tabs, text boxes, dialog boxes, status bars, navigation bars, Widgets, etc. at least one of the visual interface elements.
  • GUI Graphical User Interface
  • FIG. 4 is a schematic diagram of software configuration in the display device 200 according to some embodiments of the present application.
  • the system is divided into four layers. , the Application Framework layer (referred to as the "framework layer"), the Android runtime (Android runtime) and the system library layer (referred to as the “system runtime layer”), and the kernel layer.
  • the kernel layer contains at least one of the following drivers: audio driver, display driver, Bluetooth driver, camera driver, WIFI driver, USB driver, HDMI driver, sensor driver (such as fingerprint sensor, temperature sensor, pressure sensor, etc.), and power supply drive etc.
  • FIG. 5 is a schematic diagram showing an icon control interface of an application in a display device 200 according to some embodiments of the present application.
  • the application layer includes at least one application that can display a corresponding icon control on the display, such as: Live TV application icon control, video on demand application icon control, media center application icon control, application center icon control, game application icon control, etc.
  • Live TV app that can provide live TV from different sources.
  • Video-on-demand application that can provide video from different storage sources. Unlike live TV applications, video-on-demand provides a display of video from certain storage sources.
  • a media center application that can provide a variety of multimedia content playback applications. The application center can provide storage of various applications.
  • the light sensor is a color temperature sensor for collecting the ambient color temperature of the environment where the display device is located, and the ambient color temperature may be the RGB value of ambient light in the environment where the display device is located.
  • the light sensor can be built into the display device as a detector, or can be externally connected to the display device as an external device.
  • the light sensor can be connected to the external device interface of the display device, connected to the display device, and the ambient color temperature collected by the light sensor can be sent to the display device.
  • the controller may obtain the target ambient color temperature collected by the light sensor. After acquiring the target environment color temperature, the controller can adjust the display parameters of the display device in combination with the current target environment color temperature, so that the display parameters of the display device can be adapted to the environment, thereby improving the display effect. For example, it may be to adjust the display parameters of the target image in the display, such as the white balance value and the like.
  • the display device has an ambient color temperature adjustment function.
  • the ambient color temperature adjustment function When the ambient color temperature adjustment function is enabled on the display device, the display parameters can be automatically adjusted according to the ambient color temperature, thereby improving the display effect.
  • the display device may be set with an ambient color temperature adjustment mode. In the ambient color temperature adjustment mode, the display device can automatically adjust the display parameters according to the ambient color temperature.
  • the user may send an ambient color temperature adjustment mode instruction to the display device by operating a designated button on the remote control.
  • a designated button on the remote control In the actual application process, the corresponding relationship between the ambient color temperature adjustment mode command and the buttons of the remote control is pre-bound.
  • an ambient color temperature adjustment mode button is set on the remote control.
  • the remote control sends an ambient color temperature adjustment mode command to the controller, and the controller controls the display device to enter the ambient color temperature adjustment mode.
  • the controller can control the display device to exit the ambient color temperature adjustment mode.
  • the correspondence between the ambient color temperature adjustment mode command and multiple remote control buttons can also be pre-bound.
  • the remote Color temperature adjustment mode command When the user touches multiple buttons bound to the ambient color temperature adjustment mode command, the remote Color temperature adjustment mode command.
  • the user can use the sound collector of the display device to send an ambient color temperature adjustment mode instruction to the display device through voice input, so as to control the display device to enter the ambient color temperature adjustment mode.
  • the display device may be provided with an intelligent voice system, and the intelligent voice system may recognize the user's voice to extract the instruction content input by the user.
  • the user can input a preset wake-up word through the microphone to activate the intelligent voice system, so that the controller can respond to the command input by the user.
  • the user may send an ambient color temperature adjustment mode instruction to the display device through a preset gesture.
  • the display device can detect the user's behavior through an image collector, such as a camera. When the user makes a preset gesture, it can be considered that the user sends an ambient color temperature adjustment mode instruction to the display device.
  • an ambient color temperature adjustment mode instruction may also be sent to the display device.
  • a control can be set in the mobile terminal, which can be used to select whether to enter the ambient color temperature adjustment mode, so as to send the ambient color temperature adjustment mode command to the controller.
  • the controller can control the display device to enter the ambient color temperature adjustment mode.
  • the controller in order to prevent the user from accidentally triggering the ambient color temperature adjustment mode, when the controller receives the ambient color temperature adjustment mode instruction, it can control the display to display the ambient color temperature adjustment mode confirmation information, so that the user can make a second confirmation whether to control the The display device enters the ambient color temperature adjustment mode.
  • FIG. 6 is a schematic diagram of displaying confirmation information of an ambient color temperature adjustment mode in a display according to some embodiments of the present application.
  • FIG. 7 is an interaction flow diagram of various components of a display device according to some embodiments of the present application.
  • the controller can first obtain the target ambient color temperature collected by the light sensor, and then adjust the display parameters of the display device according to the target ambient color temperature, so that the display parameters can adapt to the environment where the display device is located, thereby Improve the display effect.
  • the controller may first convert the target ambient color temperature to the display color temperature.
  • the display color temperature refers to a CCT value (correlated color temperature, correlated color temperature), and the correlated color temperature refers to the Kelvin rated value at which the color composition of the light source is closest to the human perception of color.
  • the controller can use the CCT algorithm to convert the color temperature of the target environment into a CCT value, so as to obtain the display color temperature corresponding to the environment in which the display device is currently located.
  • the target ambient color temperature can be processed by using the correlated color temperature calculation formula to obtain the display color temperature.
  • a sampling period and sampling times may be preset, such as 10s and 4 times. That is, the light sensor can continuously sample the ambient color temperature 4 times according to a period of 10 to obtain four ambient color temperatures.
  • the controller can convert these four ambient color temperatures into CCT values respectively, and obtain the average CCT value of the four CCT values, so as to use the average CCT value as the display color temperature to improve the accuracy of the correlated color temperature, so that the obtained The ambient color temperature is more stable.
  • the controller may detect the display color temperature, and determine whether the ambient color temperature of the environment where the display device is located is normal by judging whether the display color temperature is within the range of the color temperature threshold.
  • a color temperature threshold [a, b] can be preset, which can be [0, 7500K]. If the controller detects that the display color temperature is not within the range of the color temperature threshold, it determines that the ambient color temperature of the environment where the display device is located is abnormal.
  • the controller will not adjust the display parameters of the display device until the light sensor obtains the After one ambient color temperature, it is then judged whether the display color temperature corresponding to the next ambient color temperature is within the range of the color temperature threshold.
  • the color temperature threshold may be set by the manufacturer of the display device. Different manufacturers may set different color temperature thresholds, and may also set the same color temperature threshold, which is not limited in this embodiment of the present application.
  • the controller can adjust the display parameters of the display device according to the display color temperature.
  • FIG. 8 is a schematic diagram of a color temperature abnormality prompt interface according to some embodiments of the present application. As shown in FIG. 8 , after the controller determines that the ambient color temperature of the environment where the display device is located is abnormal, it can control the display to display the color temperature Abnormal prompt interface, the color temperature abnormal prompt interface is used to prompt the user: the ambient color temperature of the current display device is in an abnormal state, and the user can detect whether the light sensor is faulty.
  • the controller may adjust the display parameters of the display device according to the display color temperature converted from the target ambient color temperature. For example, the controller may detect the display color temperature, determine the color temperature range in which the display color temperature is located, and obtain the target color temperature range.
  • the color temperature interval refers to each interval range obtained by dividing the correlated color temperature according to the preset color temperature threshold in combination with the subjective evaluation of the correlated color temperature by humans. By judging the interval range in which the display color temperature is located, the color temperature interval in which the current display color temperature is located can be determined. For example, the display color temperature can be divided into 6 color temperature intervals, as shown in Table 1.
  • [L0, L6] is the preset color temperature threshold.
  • L0, L1, L2, L3, L4, L5, and L6 are boundary values of 6 color temperature intervals, and satisfy the relationship of L6>L5>L4>L3>L2>L1>L0.
  • the color temperature range of the first color temperature interval Level1 is L0-L1, which may be 0-1500K.
  • the color temperature range of the second color temperature interval Level2 is L1-L2, which may be 1500K-3000K.
  • the color temperature range of the third color temperature interval Level3 is L2-L3, which may be 3000K-4500K.
  • the color temperature range of the fourth color temperature interval Level4 is L3-L4, which may be 4500K-5500K.
  • the color temperature range of the fifth color temperature interval Level5 is L4-L5, which may be 5500K-6500K.
  • the color temperature range of the sixth color temperature interval Level6 is L5-L6, which may be 6500K-7500K. From the first color temperature range to the sixth color temperature range, the penetrating power of the light effect is gradually weakened.
  • the controller can determine the target color temperature range in which the display color temperature is located. For example, if the current display color temperature is within the range of L2-L3, the target color temperature interval in which the current display color temperature is located is the third color temperature interval Level3.
  • the third color temperature interval can be set as a normal color temperature interval, the first and second color temperature intervals are warm color temperature intervals, and the fourth, fifth and sixth color temperature intervals are cool color temperature intervals.
  • the display parameters corresponding to the target color temperature interval can be obtained.
  • display parameters corresponding to each color temperature interval can be preset, and the display parameters can include white balance value, contrast, and color saturation.
  • a display parameter corresponding relationship may be preset, and the display parameter corresponding relationship is used to represent the display parameters corresponding to each color temperature interval. Since the display color temperature can be determined according to the ambient color temperature, so as to determine the color temperature interval, the corresponding relationship of the display parameters can also be used to represent the respective display parameters corresponding to different ambient color temperatures.
  • each color temperature interval corresponds to a white balance value.
  • the white balance value can be set relatively small; when the color temperature is large, the white balance value can be set relatively large. . Therefore, from the first color temperature interval to the sixth color temperature interval, the white balance value can be set from small to large.
  • Table 2 shows the display parameters corresponding to each color temperature interval in some embodiments.
  • the display parameters corresponding to the current target color temperature interval are: white balance value B3, contrast D3 and color saturation Y3.
  • the display parameters corresponding to the target color temperature range can be set as the target display parameters.
  • the controller may adjust the display parameters of the display device according to the target display parameters. Specifically, the controller may adjust the display parameters of the target image to the target display parameters.
  • the initial display parameters of the display device are: white balance value B0, contrast D0, and color saturation Y0.
  • the display parameters corresponding to the fourth color temperature interval Level4 can be determined, and the display parameters of the display device are updated to the display parameters corresponding to the fourth color temperature interval Level4. That is, the white balance value of the display device is updated from B0 to B4, the contrast of the display device is updated from D0 to D4, and the color saturation of the display device is updated from Y0 to Y4.
  • the display parameters of the display device are automatically adjusted according to the ambient color temperature.
  • a white balance value adjustment amount may be preset for each color temperature interval, that is, the display parameter correspondence is used to represent the white balance value adjustment amount corresponding to each color temperature interval.
  • the initial white balance value of the display device is B0, which can be represented by RGB to, where the value of R is R0, the value of G is G0, and the value of B is B0.
  • Each color temperature interval corresponds to an adjustment amount.
  • the adjustment amount corresponding to the first color temperature interval is b1 , including the R value adjustment amount r1, the G value g1, and the B value b1.
  • r1, g1 and b1 may be the same or different.
  • the adjusted white balance value of the display device is R value R0-r1
  • G value is G0-g1
  • B value is B0-b1.
  • the adjustment amount corresponding to the second color temperature interval is b2. It should be noted that the color temperature of the first color temperature interval is smaller than that of the second color temperature interval, so the degree of warm tone is deeper, and the white balance value needs to be set smaller, that is, b1>b2 .
  • the third color temperature interval is set as the normal color temperature interval, and the corresponding white balance value is the initial white balance value.
  • the adjustment amounts of the white balance value are b4, b5, and b6 in sequence. The degree of cool color gradually deepens, so the corresponding white balance value adjustment amount b4 ⁇ b5 ⁇ b6.
  • FIG. 9 is a schematic diagram of a display device adjusting a white balance value according to some embodiments of the present application. When it is detected that the display color temperature corresponding to the ambient color temperature is in the first color temperature range, the white balance value of the display device will decrease.
  • the adjusted white balance value is R value R0-r1, G value is G0-g1, and B value is B0- b1.
  • a detection period may be preset, for example, 10 minutes, and in each detection period, the display device may automatically adjust the display parameters according to the ambient color temperature.
  • the controller can control the light sensor to re-obtain the ambient color temperature at the current moment, so as to obtain the display color temperature at the current moment. Further, the controller can determine the color temperature interval corresponding to the display color temperature at the current moment, thereby determining the new target display parameters, and updating the current display parameters of the display device to the new target display parameters, so that the display parameters are adapted to the environment at the current moment. Color temperature to continuously improve the display effect of the display device and improve the user experience.
  • some embodiments of the present application propose to adjust the relative brightness of the display device according to the ambient brightness. Makes automatic adjustments to suit the current ambient brightness. That is, in addition to the user's ambient color temperature adjustment function, the display device may also have an ambient brightness adjustment function.
  • the ambient brightness adjustment function is enabled on the display device, the display device can be controlled to enter the ambient brightness adjustment mode, and the brightness of the display device can be automatically adjusted according to the ambient brightness, thereby improving the display effect.
  • the user can control whether to enable the ambient color temperature adjustment function and/or the ambient brightness adjustment function of the display device.
  • the user may input an instruction to the display device instructing to display the graphical function interface.
  • the controller can control the display to display the image function interface.
  • 10 is a schematic diagram of an image function interface according to some embodiments of the present application.
  • the image function interface includes several image function options supported by the display device, including: screen brightness mode adjustment function, ambient color temperature adjustment function, ambient brightness Adjustment function, area light control adjustment function and factory reset function.
  • the user can choose the standard mode, high-performance mode and energy-saving mode; under the regional light control adjustment function, the user can choose three kinds of regional light control; the user can also turn on or off the ambient color temperature adjustment function and ambient brightness adjustment function.
  • the user can control whether each image function is enabled on the display device through the image function interface.
  • the controller can control the display device to enter the ambient color temperature adjustment mode, determine the target display parameters corresponding to the current target ambient color temperature, and adjust the display parameters of the display device to the target display parameters.
  • the controller can also acquire the ambient brightness of the environment where the display device is currently located, and automatically adjust the brightness of the display device according to the ambient brightness.
  • FIG. 11 is a schematic diagram of a display device automatically adjusting brightness according to some embodiments of the present application, please refer to FIG. 11 .
  • the controller may first obtain the current ambient brightness.
  • a brightness sensor may be built in the display device, or an external brightness sensor may be externally connected through an external device interface.
  • the current ambient brightness can be collected through the brightness sensor.
  • the controller may also acquire the current ambient brightness through the target ambient color temperature collected by the light sensor. Specifically, the controller may process the target ambient color temperature by using an algorithm that converts color temperature into luminance to obtain ambient luminance.
  • the weight calculation method can be used to obtain the ambient brightness
  • the target ambient color temperature can be an RGB value.
  • the ambient brightness in some embodiments of the present application refers to luminous flux (Luminous flux, lumen value, Lux value).
  • the display device can be set to a relatively small brightness, so that Make the display device more adaptable to the current environment, and the displayed picture will not be too dazzling.
  • the display device can be set to a relatively large brightness, so that the screen of the display is bright enough, and the human eye can normally distinguish the TV screen.
  • the controller may first detect the ambient brightness to determine whether the current ambient brightness is normal.
  • a brightness threshold may be preset. For example, if the brightness value range of ambient light that can be collected by the brightness sensor is A-B, this range can be set as the brightness threshold value.
  • the luminance threshold may be obtained according to the color temperature threshold, and the luminance threshold may be determined by converting two adjacent points of the color temperature threshold into corresponding luminances, and using these two luminances as the luminance threshold critical points.
  • the controller can determine whether the ambient brightness is within the range of the brightness threshold, so as to determine whether the ambient brightness of the environment where the display device is located is normal.
  • the ambient brightness is less than the minimum value of the brightness threshold, it is considered that the ambient brightness is too weak, and the human eye is not suitable for using the display device in the current ambient brightness.
  • the ambient brightness is greater than the maximum value of the brightness threshold, it is considered that the ambient brightness is too low Strong, the human eye is also not suitable for using the display device in the current ambient brightness, in both cases, the ambient brightness will be determined to be an abnormal state. That is, if the controller detects that the ambient brightness is not within the range of the brightness threshold, it is determined that the ambient brightness of the environment where the display device is located is abnormal.
  • the brightness threshold may be set by the manufacturer of the display device, and different manufacturers may set different ambient brightness, or may set the same, which is not limited in this embodiment of the present application.
  • the controller can adjust the brightness of the display device according to the ambient brightness.
  • FIG. 12 is a schematic diagram of an interface for prompting abnormal ambient brightness according to some embodiments of the present application.
  • the controller can control the display to display the abnormal ambient brightness prompt interface.
  • the abnormal ambient brightness prompt interface is used to prompt the user: the ambient brightness of the current environment where the display device is located is abnormal. The user can detect whether the brightness sensor is faulty, or Turn off the display device directly or adjust the brightness of the surrounding environment.
  • the controller may adjust the brightness of the display device based on ambient brightness. For example, the controller may detect the ambient brightness, determine the brightness interval in which the ambient brightness is located, and obtain the target brightness interval.
  • the brightness interval refers to each interval range obtained by dividing the ambient brightness according to the preset brightness threshold in combination with the subjective evaluation of the ambient brightness by humans. By judging the interval range in which the ambient brightness is located, the target brightness interval in which the current ambient brightness is located can be determined. Among them, human subjective evaluation of ambient light brightness can be divided into: particularly dark, dark, normal, bright and so on.
  • the brightness threshold may be divided according to four evaluations, and each evaluation may correspond to one brightness interval, or may correspond to multiple brightness intervals.
  • the brightness threshold can be divided into 8 intervals as a whole, among which, the evaluation of extremely dark corresponds to 3 intervals of brightness, the evaluation of dark corresponds to 2 intervals of brightness, the evaluation of normal corresponds to 2 intervals of brightness, and the evaluation of bright corresponds to 1 brightness interval interval.
  • Table 3 shows the division of luminance intervals.
  • [0, T7] is the preset brightness threshold.
  • P0, P1, P2, P3, P4, P5, P6, P7, P8 are the boundary values of 8 brightness intervals, and satisfy the relationship of P8>P7>P6>P5>P4>P3>P2>P1>P0.
  • the brightness threshold that can be set to ambient brightness is 0-255.
  • the ambient brightness 0-100 may be set as a particularly dark evaluation type, and three brightness intervals may be set, for example, a first brightness interval of 0-30, a second brightness interval of 30-65, and a third brightness interval of 65-100.
  • the ambient brightness 100-150 may be set as a dark evaluation type, and two brightness intervals may be set, for example, a fourth brightness interval 100-125 and a fifth brightness interval 125-150.
  • the ambient brightness 150-230 can be set as a normal evaluation type, and two brightness intervals can be set, for example, a sixth brightness interval 150-190 and a seventh brightness interval 190-230.
  • the ambient brightness 230-255 can be set as a bright evaluation type, and a brightness interval can be set, for example, the eighth brightness interval 230-255.
  • the controller can determine the target brightness range in which the ambient brightness is located. For example, if the current ambient brightness is within the range of P2-P3, the target brightness interval in which the current ambient brightness is located is the third brightness interval.
  • two adjacent luminance intervals may be discontinuous.
  • the first brightness interval is (0cd/m2, 10cd/m2)
  • the second brightness interval may be (13cd/m2-50cd/m2), where cd/m2 is candela/square meter.
  • the luminance interval (10cd/m2, 13cd/m2) between the first luminance interval and the second luminance interval may be referred to as a luminance buffer interval.
  • the brightness buffer interval refers to: when the brightness of the ambient light changes slightly, humans cannot respond to such small changes. In this case, the human subjective evaluation of the brightness of the ambient light will not change.
  • the brightness interval in which the ambient light brightness value is located is called the brightness buffer interval. When it is detected that the current ambient brightness is within the brightness buffer time, the controller will not adjust the brightness of the display device.
  • the controller may adjust the brightness of the display device according to the target brightness interval.
  • the material of the display may be different, and the parameters for measuring its brightness are also different for different types of displays.
  • the PLC Peak Luminance Control, peak brightness control
  • the abscissa of the PLC curve is the gray value of the displayed image, and the ordinate is the peak brightness of the display.
  • the PLC curve adjusts the peak brightness of the display according to the gray value of the displayed image, making the display screen more three-dimensional.
  • the PWM (pulse width modulation, pulse width modulation) value can be used to measure its backlight brightness.
  • PWM is a technology that controls the brightness of the backlight by controlling the duty cycle of the high level and the low level within a time period.
  • the PWM value can be used to measure the backlight of a display device.
  • the first type of display refers to an OLED (Organic Light-Emitting Diode, organic light-emitting semiconductor) screen.
  • OLED Organic Light-Emitting Diode, organic light-emitting semiconductor
  • OLED does not require a separate backlight or color filter, and can emit light by itself, generally using light-emitting Composed of an array of diodes, each OLED pixel can be assigned three colors of red, green, and blue.
  • the backlight brightness of the OLED screen can be obtained by using the PLC curve, and the backlight brightness of the first type of display can be adjusted through the PLC curve corresponding to the ambient brightness.
  • the second type of display refers to other screens other than OLED screens, such as LED screens or LCD screens.
  • an LCD Liquid-Crystal Display, liquid crystal display
  • the white light will form basic colors such as red, green and blue after passing through, and the light passing rate of each pixel is controlled by the current, thereby controlling the color of the pixel.
  • the backlight brightness of the LCD screen can be expressed by PWM values.
  • the brightness of the display device may also include the brightness of the target image, that is, the brightness of each pixel in the target image.
  • a gamma curve can be used to measure the brightness of the target image.
  • the Gamma curve is a special tone curve.
  • the gamma curve is used to represent the mapping relationship between the gray value of the pixel points of the image and the brightness value, and is used to combine the gray value of the pixel points of the image to adjust the image.
  • the brightness value of the pixel is used to measure the brightness of the target image.
  • the abscissa of the gamma curve represents the gray value
  • the ordinate represents the brightness of the pixels of the adjusted display image, that is, the brightness of the pixel color of the adjusted display image.
  • the color of each pixel may include red, green and blue, and adjusting the brightness of the pixel color of the displayed image can also be interpreted as adjusting the brightness ratio of the red, green, and blue colors of the displayed image pixel.
  • the brightness of the pixel color can also be described as the lightness and darkness of the pixel color.
  • the brightness of the displayed image can be adjusted through the gamma curve corresponding to the ambient brightness.
  • FIG. 13 is a flowchart of a display device adjusting the brightness of different types of displays according to some embodiments of the present application.
  • the controller may first detect the type of the display, and when it is detected that the display is the first When the display is similar, the controller can obtain the target PLC curve and the target gamma curve corresponding to the target brightness interval. Further, the backlight brightness of the display device can be adjusted according to the target PLC curve, and the brightness of each pixel in the target image can be adjusted according to the target gamma curve.
  • the controller when acquiring the target PLC curve corresponding to the target brightness interval, may first acquire the initial PLC curve of the display device. For the target brightness interval, the controller can obtain the PLC curve offset corresponding to the target brightness interval, and then adjust the initial PLC curve through the PLC curve offset to obtain the target PLC curve.
  • 14 is a flowchart of adjusting backlight brightness of a display device according to some embodiments of the present application.
  • a PLC curve offset corresponding to each target luminance interval may be preset.
  • a PLC curve offset correspondence may be preset, and the PLC curve offset correspondence is used to represent the PLC curve offset corresponding to each target brightness interval.
  • FIG. 15 is a flowchart of adjusting the brightness of a target image according to some embodiments of the present application.
  • the corresponding PLC curve offset may be multiple.
  • the PLC curve may be a curve composed of multiple sub-segments.
  • the gray value range represented by the abscissa of the PLC curve may be normalized to a range of 0-255, that is, the PLC curve may include 256 gray values.
  • the initial PLC curve can be divided into P sub-segments, the number of gray values included in each sub-segment can be the same or different, and each sub-segment can correspond to a PLC curve offset.
  • the offset value may be the offset of the maximum brightness value (also referred to as peak brightness) corresponding to the grayscale value.
  • the offset corresponding to the subsection is offset, so as to obtain the adjusted subsection.
  • each subsection of the initial PLC curve is adjusted to obtain the adjusted target PLC curve.
  • the controller when acquiring the target gamma curve corresponding to the target brightness interval, may first acquire the initial gamma curve of the display device. For the target brightness interval, the controller can obtain the gamma curve offset corresponding to the target brightness interval. The target gamma curve can be obtained by adjusting the initial gamma curve by the offset of the gamma curve.
  • a gamma curve offset corresponding to each target luminance interval may be preset.
  • a gamma curve offset corresponding relationship may be preset, and the gamma curve offset corresponding relationship is used to represent the gamma curve offset corresponding to each target brightness interval.
  • the gamma curve can be a curve obtained by connecting multiple points in sequence, that is, the gamma curve can include Q nodes, and the gray value range represented by the abscissa of the gamma curve can be normalized to a range of 0-255. That is, the gamma curve can include 256 gray values, and the points corresponding to the Q gray values can be selected as nodes, and the nodes can be connected in order of gray values from small to large to obtain the gamma curve.
  • Each node of the initial gamma curve can correspond to a gamma curve offset. Adjust each node according to the gamma curve offset corresponding to each node to obtain all the adjusted nodes, and then connect all the nodes to obtain the target gamma curve.
  • the backlight brightness of the display device and the brightness of each pixel in the target image can be adjusted.
  • FIG. 16 is a flowchart of adjusting the backlight brightness of a display device according to some embodiments of the present application.
  • the controller can obtain the corresponding brightness of the target brightness interval.
  • the backlight brightness of the display device can be adjusted according to the target brightness, and the brightness of each pixel in the target image can be adjusted according to the target gamma curve.
  • the target brightness in some embodiments of the present application refers to a PWM value.
  • the PWM value corresponding to each brightness interval may be preset.
  • a PWM value corresponding relationship may be preset, and the PWM value corresponding relationship is used to represent the PWM value corresponding to each brightness interval.
  • the backlight brightness of the display device can be determined according to the target PLC curve or the target brightness, and the brightness of the target image can also be determined according to the target gamma curve.
  • the ambient brightness is dark, the brightness of the display device needs to be lower so that the user does not feel too dazzling, and when the ambient brightness is brighter, the brightness of the display device needs to be higher so that the user can see the target image clearly.
  • the brightness interval corresponding to the ambient brightness is from the first brightness interval to the eighth brightness interval, and the brightness of the display device will gradually increase.
  • the ambient brightness corresponding to the sixth brightness interval and the seventh brightness interval may be set, the brightness of the display device remains unchanged at the initial brightness.
  • the initial brightness of the display device is: the backlight brightness is p0, and the image brightness is q0.
  • the human's evaluation of the ambient brightness is bright, that is, the display device is in a brighter environment at this time, and the brightness of the display device needs to be increased.
  • the brightness corresponding to the display device is the backlight brightness p8, the image brightness q8, and p8>p0, q8>q0.
  • FIG. 18 is a flowchart of adjusting the brightness of a display device according to some embodiments of the present application. Referring to FIG.
  • the controller does not adjust the display parameters of the display device according to the display parameters of the target brightness interval, but directly uses the display parameters corresponding to the first brightness interval as the target display parameters, and then adjusts the display device according to the target display parameters. display parameters. If the target brightness interval is not the brightness interval corresponding to the particularly dark evaluation type, the controller can use the display parameters of the target color brightness interval as the target display parameters, and then adjust the display parameters of the display device according to the target display parameters.
  • the controller adjusts the brightness of the display device according to the first brightness interval.
  • the controller can directly adjust the backlight brightness of the display device according to the first brightness interval. For example, it will adjust the initial PLC curve according to the PLC curve offset corresponding to the first brightness interval to obtain The first PLC curve corresponding to the first brightness interval, and the backlight brightness of the display device is adjusted according to the first PLC curve.
  • the controller directly determines the first brightness corresponding to the first brightness interval, that is, the PWM value corresponding to the first brightness interval, and adjusts the backlight brightness of the display device to the first brightness.
  • the controller can directly adjust the brightness of the target image according to the first brightness interval.
  • the initial gamma curve can be adjusted according to the offset of the gamma curve corresponding to the first brightness interval to obtain the first gamma curve corresponding to the first brightness interval, and the brightness of the target image can be adjusted according to the first gamma curve .
  • the controller may continue to adjust the brightness of the display device according to the target brightness interval, or it may be in the preset brightness interval, that is, the evaluation of particularly dark Adjust the brightness of the display device in any one of all brightness intervals corresponding to the type.
  • the embodiments of the present application do not make specific limitations.
  • the display device obtains the brightness value of the ambient light.
  • the display device may acquire the brightness value of the current ambient light through the ambient light sensor.
  • the brightness value of the current ambient light we refer to the brightness value of the current ambient light as the first brightness value.
  • the display device detects the first brightness value, and determines whether the collected first brightness value is normal.
  • the ambient light brightness value range that can be collected by the ambient light sensor is 0cd/m2-2048cd/m2, then when the display device detects that the first brightness value is not within this range, it determines that the collected first brightness value unusual.
  • the display device determines that the brightness interval in which the first brightness value is located is the first brightness interval.
  • the first brightness interval is one of the N segments.
  • the brightness range of ambient light that can be collected by the ambient light sensor is 0cd/m2-2048cd/m2
  • the brightness range of 0cd/m2-2048cd/m2 is divided into N brightness intervals, then the first brightness interval is one of the N brightness intervals.
  • different brightness intervals do not overlap.
  • the N brightness intervals may constitute a brightness range of ambient light collected by the ambient light sensor.
  • the display device When the display device determines that the brightness value of the ambient light collected by the ambient light sensor is in the brightness buffer time, it will delete the collected ambient light brightness value, and re-acquire the current ambient light brightness value through the ambient light sensor until the acquired ambient light value is reached.
  • the first brightness value is determined to be acquired only when the brightness value of the light is not between the brightness buffers. After acquiring the first brightness value, the brightness interval in which the first brightness value is located is determined from the N brightness intervals. For convenience of description, the brightness interval in which the first brightness value is located is hereinafter referred to as the first brightness interval.
  • the display device adjusts the brightness of each pixel in the image to be displayed according to the gamma curve corresponding to the first brightness interval. It should be noted that different brightness intervals correspond to different gamma curves, and here the gamma curve corresponding to the first brightness interval is referred to as the first gamma curve.
  • the display device adjusts the brightness of each pixel in the image to be displayed according to the first gamma curve, and displays the adjusted image to be displayed.
  • the first gamma curve may be adjusted based on the original gamma curve corresponding to the display device.
  • the process of adjusting and obtaining the gamma curve corresponding to each brightness interval may be performed by a controller in the display device.
  • the process of adjusting and obtaining gamma curves corresponding to different brightness intervals may be performed by a service device, and configuring the display device after adjusting and obtaining gamma curves corresponding to different brightness intervals.
  • This embodiment of the present application does not limit this, and the following description takes as an example that the process of adjusting the gamma curves corresponding to different brightness intervals is performed by a controller in the display device as an example.
  • the following description takes as an example the first gamma curve corresponding to the first luminance interval obtained by adjusting.
  • the controller divides the original gamma curve into multiple sub-segments, and adjusts the two end points of each sub-segment according to the adjustment values corresponding to the two end points of each sub-segment.
  • the controller adjusts the first sub-segment of the original gamma curve according to the preset functional relationship and the two end points of the adjusted first sub-segment to obtain the first sub-segment of the first gamma curve.
  • the first subsection is any subsection of the gamma curve.
  • the controller can divide the original gamma curve into M sub-segments, for example, the gray value range represented by the abscissa of the gamma curve can be normalized to a range of 0-255, that is, the gamma curve can include 256 grayscale value.
  • the original gamma curve may be divided into M sub-segments, and each sub-segment may include the same or different number of grayscale values.
  • Each subsection includes two endpoints. In some embodiments of the present application, each endpoint corresponds to an offset value.
  • the offset value may be an offset of the brightness corresponding to the grayscale value.
  • the gamma curve of each sub-segment is adjusted according to the shifted brightness of the two end points of each sub-segment and the preset functional relationship.
  • the subsection to be adjusted among the M subsections is called the first subsection, and the two end points of the first subsection are respectively called the first end point and the second end point, wherein M>0.
  • the M offset values corresponding to the first brightness interval may be the same or different
  • the first endpoint corresponds to the first offset value in the first brightness interval
  • the second endpoint corresponds to the first offset value in the first brightness interval.
  • the first brightness interval corresponds to the second offset value.
  • the M offset values included in the first luminance interval may be preset according to experience. Different brightness intervals can correspond to different offset values.
  • the controller adjusts the first end point of the first subsection of the original gamma curve according to the first offset value to obtain the first end point of the first subsection of the first gamma curve; and adjusting the second end point of the first subsection of the original gamma curve according to the second offset value to obtain the second end point of the first subsection of the first gamma curve.
  • the controller adjusts all the endpoints corresponding to the M sub-segments in the original gamma curve according to the above method, and the curve adjusted according to the original gamma curve is called the first gamma curve.
  • the preset functional relationship may be a functional relationship such as a linear function, an exponential function, or a quadratic function, which is not limited in this embodiment of the present application.
  • the controller first determines a preset functional relationship corresponding to the first sub-segment according to two endpoints of the first sub-segment of the original gamma curve, and then determines the first sub-segment divided by two according to the determined preset functional relationship points other than one endpoint.
  • the first subsection of the first gamma curve is obtained. Using this method to adjust the first subsection of the original gamma curve can ensure a smooth transition between all points in the first subsection of the first gamma curve.
  • the value of M in the above steps can be set to 16, that is, the original gamma curve includes 16 sub-segments, then the first luminance interval corresponds to 16 offset values.
  • the 16 The offset values are respectively represented as A1, A2, A3...A16.
  • the gray value range of the displayed image is 0-255, and the original gamma curve can contain 256 points, then the first sub-segment of the original gamma curve contains 16 points (including the first endpoint and the second endpoint).
  • the endpoints of the 16 sub-segments of the original gamma curve are determined according to the 16 offset values corresponding to the first luminance interval for adjustment. Referring to the example shown in Table 1, the endpoints of the 16 sub-segments of the original gamma curve are adjusted by 16 offset values to obtain the endpoints of the 16 sub-segments of the first gamma curve.
  • the first column is the abscissa of the gamma curve, that is, the gray value; the second column is the ordinate value of each endpoint included in the 16 subsections of the original gamma curve; the third column is the first column 16 offset values corresponding to the luminance interval; the fourth column is the ordinate value of the 17 endpoints included in the 16 sub-segments of the first gamma curve.
  • the 16 offset values corresponding to the first luminance interval are used to adjust the latter endpoint value of the two endpoint values included in each subsection.
  • the values of the constant items k and b of the linear function are determined according to the first endpoint and the second endpoint of the first subsection of the adjusted original gamma curve.
  • the first end point of the first subsection of the original gamma curve is (80, 90), and the second end point is (100, 105).
  • the first-order function satisfied by the first subsection of the original gamma curve is determined.
  • the controller adjusts other sub-segments of the original gamma curve except the first sub-segment according to the above method, and obtains the first gamma curve after all adjustments are completed.
  • FIG. 19B it is a schematic diagram of the comparison between the original gamma curve and the first gamma curve.
  • some embodiments of the present application further provide a method for adjusting the brightness value of the display according to the PLC curve corresponding to the first brightness interval.
  • the PLC curve is used to adjust the maximum brightness of the display.
  • the abscissa of the PLC curve is the gray value of the displayed image, and the ordinate is the maximum brightness value of the display. It should be noted that the PLC curves corresponding to different brightness intervals are not the same. For the convenience of description, the PLC curve corresponding to the first brightness interval is referred to as the first PLC curve.
  • the first PLC curve may be adjusted based on the original PLC curve corresponding to the display device.
  • the process of adjusting and obtaining the PLC curves corresponding to each brightness interval may be performed by a controller in the display device.
  • the process of adjusting and obtaining PLC curves corresponding to different brightness intervals may be performed by a service device, and configuring the display device after adjusting and obtaining PLC curves corresponding to different brightness intervals. The following description will be given by taking an example that the process of adjusting the first PLC curve is executed by the controller.
  • the controller divides the original PLC curve into sub-segments.
  • the controller adjusts each point in each subsection of the PLC curve according to the offset value corresponding to each subsection of the PLC curve to obtain the first PLC curve.
  • the controller may divide the original PLC curve into Q sub-segments, for example, the gray value range represented by the abscissa of the PLC curve may be normalized to a range of 0-255, that is, the PLC curve may include 256 gray values .
  • the original PLC curve may be divided into Q sub-segments, and each sub-segment may include the same or different number of grayscale values.
  • each subsection corresponds to an offset value.
  • the offset value may be the offset of the maximum brightness value (also referred to as peak brightness) corresponding to the grayscale value.
  • the offset corresponding to the subsection is offset, thereby obtaining an adjusted subsection.
  • Each sub-section of the PLC curve is adjusted according to the offset value corresponding to the first brightness interval, so as to realize the regulation of the brightness of the display and improve the picture quality of the display device while reducing the power consumption.
  • the first brightness interval includes Q offset values, and the second subsection of the original PLC curve corresponds to the third offset value in the first brightness interval.
  • the Q offset values are preset according to the first brightness interval. For the PLC curve, different brightness intervals can correspond to different offset values.
  • the P points in the second subsection of the original PLC curve are adjusted according to the third offset value to obtain the second subsection of the first PLC curve.
  • the original PLC curve includes 8 sub-segments, and each sub-segment includes P points
  • the value of P is 32.
  • the second subsection of the 8 subsections of the original PLC curve as the third section of the original PLC curve as an example, referring to FIG. 20A , it shows the difference between the second subsection of the original PLC curve and the second subsection of the first PLC curve. Comparison chart.
  • the second subsection of the original PLC curve is (100, 200)-(150, 150).
  • the second subsection of the first PLC curve is determined to be (100, 130)-(150, 80) , refer to Table 5.
  • the first PLC curve is obtained by adjusting all 8 sub-segments included in the original PLC curve according to the offset value corresponding to the first brightness interval.
  • FIG. 20B it is a comparison diagram of the original PLC curve and the first PLC curve.
  • the above-mentioned scheme of using a gamma curve to adjust the brightness of each pixel of the image to be displayed, and a scheme of adjusting the brightness value of the display according to the PLC curve can be implemented separately, or Can be implemented in combination.
  • the brightness of each pixel of the to-be-displayed image may be adjusted according to the gamma curve; or, the brightness value of the display used for displaying the to-be-displayed image may be adjusted according to the PLC curve.
  • the brightness of each pixel of the image to be displayed can be adjusted first according to the gamma curve, and then the brightness value of the display used to display the image to be displayed can be adjusted according to the PLC curve;
  • the curve adjusts the brightness value of the display, and then adjusts the brightness of each pixel of the image to be displayed according to the gamma curve.
  • the ambient light sensor is turned off, the brightness of each pixel of the displayed image and the brightness of the display are no longer adjusted, so as to avoid abnormality of the displayed image.
  • the backlight brightness mode of the display device includes a light-sensing mode and a non-light-sensing mode, wherein the light-sensing mode refers to a mode in which the backlight brightness of the display is adaptively and automatically adjusted according to the brightness of the ambient light where the display is located , in order to achieve a better display effect under the influence of ambient light; in addition, the non-light-sensing mode includes any defined mode except the light-sensing mode, such as bright mode, soft mode, dynamic frequency conversion mode, etc.
  • the screen brightness UI value is usually set, which is convenient for the user to adjust in the form of a scale value or a progress bar.
  • the UI value ranges from 0 to 20 or 0 to 30, as shown in Figure 21A.
  • the UI value corresponds to the PWM value that directly controls the brightness of the screen.
  • the UI value is usually set as an integer value, that is, there are 31 specific values for the adjustment of the UI value, all corresponding to The only set of PWM values is to adjust the UI value, and the middle layer will call the corresponding PWM value to adjust the screen brightness. It can be understood that when the UI value is 0, it does not correspond to 0 of the PWM value, because in general, the user does not need to completely adjust the screen to black, which will lose the meaning of the display. ⁇ Light gain sub-mode>
  • the PWM value when the preset backlight mode of the display device is bright mode or soft mode, the PWM value is generally set to a certain value.
  • the PWM value may not be exactly the same in the soft mode due to the adjustment differences of various manufacturers, but on the whole it belongs to a soft PWM value range, showing a soft backlight display effect.
  • the PWM value of the dynamic frequency conversion mode changes in real time according to the APL (average picture luma) value of the current picture.
  • the user can adjust the size of the backlight PWM value from 0 to 255.
  • the display device When the display device is in the light-sensing mode, since the PWM value changes according to the change of the current ambient light, the ambient light is dark, the PWM value is low, and the screen brightness is low; the ambient light is bright, the PWM value is high, and the screen brightness is high; so in the light-sensing mode
  • the screen brightness interface in the light-sensing mode corresponds to the adjustment of the light-sensing gain.
  • the light-sensing gain is controlled to appropriately adjust the backlight brightness, so as to realize the adjustment of the backlight brightness, that is, the screen brightness of the display screen in the light-sensing mode.
  • the user can adjust the backlight brightness of the display through voice control or a control device such as a remote control, and the controller connected to the display reads the current backlight mode after receiving the user's adjustment of the backlight brightness signaling information, and make corresponding control adjustments according to the current mode state of the display. For example, if it is currently in a non-light-sensing mode, enable the user adjustment mode and perform user adjustment of the backlight brightness of the display; if it is currently in the light-sensing mode, Based on the light-sensing mode, the light-sensing gain sub-mode is turned on.
  • the user When the user adjusts the brightness of the backlight, the user actually adjusts the gain value of the light-sensing gain parameter in the light-sensing gain sub-mode, that is, the light sensitivity coefficient, not directly adjusting the backlight.
  • the brightness UI value The backlight brightness UI value at this time corresponds to the gain value of the light-sensing gain parameter. Based on the gain value of the light-sensing gain parameter, the user still indirectly adjusts the backlight brightness of the display.
  • the user is not limited by the backlight mode, and the user can independently and conveniently adjust the backlight brightness in any mode, omitting the cumbersome switching in some backlight modes.
  • the light-sensing interval can be divided into 9 intervals from 0 to 8. Each interval has a corresponding light-sensing value and PWM value (adjustable range value).
  • PWM value adjustable range value
  • the ambient light reaches the light of a certain interval
  • the screen brightness will be adjusted according to the PWM of the corresponding interval.
  • UI values 0-30 in the light-sensing gain sub-mode correspond to gain values of 0.4-1.6, and the scale interval of each gain value is 0.04.
  • the PWM value corresponding to each light-sensing interval is multiplied by a gain value.
  • the PWM interval value corresponding to the light-sensing interval value will move up and down as a whole, and the adjustment of the light-sensing gain has been achieved.
  • the purpose of increasing or decreasing the screen brightness is a schematic diagram of the gain of the PWM value after the gain value is 1.4 and the UI value is 25, and the 0 interval is shifted upward by 1.4 times. After the gain, the screen brightness increases by 1.4 times, so as to realize the adjustment of the screen brightness in the light-sensing mode.
  • the display device may further include a first memory, where the first memory is configured to store the relevant parameters for user adjustment of the backlight brightness of the display included when the user adjustment mode is enabled, such as specific mode parameters, brightness parameters, etc.; When the device is powered on, the current backlight brightness of the display is adjusted according to the user adjustment parameters stored in the first memory.
  • the user adjustment parameters set by the user are directly called from the first memory to customize the memory function for the user. Greatly improve the user experience.
  • the display device may further include a second memory.
  • the second memory is used to store the light-sensing gain parameters adjusted by the user; when the display device is powered on, according to the data stored in the second memory
  • the light-sensing gain parameter adjusts the light-sensing gain of the display device, thereby realizing the adjustment of the backlight brightness of the display.
  • the user adjustment parameter memory function is provided in the light sensing mode, which is beneficial to improve the user experience.
  • the backlight brightness of the display device can be adjusted through a voice control function.
  • the controller controls the display to perform display control of the backlight brightness according to the voice command. For example, when the user says: "increase the brightness of the backlight", the controller in the display device will read the current backlight mode information, and make corresponding control adjustments according to the current mode state of the display.
  • the specific increase of the backlight brightness value can be preset as a UI integer value. For example, taking the UI value of 0 to 30 as an example, when the user adjustment mode is enabled in the current non-light sensing mode, the UI value is 15. When the user speaks When "Increase Backlight Brightness", the UI value is increased to 16.
  • the user can continue to adjust the upward adjustment twice in a row or choose to long press the upward adjustment button to trigger a pop-up prompt box, the prompt box shows the content: "The light sensitivity brightness has been adjusted to the maximum under the current ambient light, if you need to Continue to increase the screen brightness, the light-sensing mode will be turned off, adjust it in the user adjustment mode, do you need it?", and set two options of YES and NO. After the user clicks YES, it will jump to the energy-saving mode to adjust the screen brightness. .
  • the control logic is basically the same as that when the ambient light is weak.
  • the existing process of jumping from the light sensing mode to the user adjustment mode is accompanied by the transition of the meaning of the UI value, because the UI value in the light sensing mode corresponds to the light sensing gain parameter value, while the user adjustment mode
  • the UI value directly corresponds to the PWM value.
  • the UI values of the two do not represent the same PWM value of screen brightness. Therefore, in order to enable users to obtain a smoother adjustment effect, the equivalent conversion of the two UI values is required.
  • a display device includes: a display for displaying a user interface; a controller connected to the display, where the controller is configured to: receive a user signaling for adjusting backlight brightness; If it is currently in the non-light-sensing mode, the user adjustment mode is enabled and the user adjusts the backlight brightness of the display; if it is currently in the light-sensing mode, the light-sensing gain sub-mode is enabled based on the light-sensing mode. , and adjust the light gain parameter of the display in the light gain sub-mode.
  • the above-mentioned implementation steps may include: receiving a user-adjusted backlight brightness signaling; according to the current backlight mode, if it is currently in a non-light-sensing mode, enabling the user adjustment mode and adjusting the display backlight brightness; If it is currently in the light-sensing mode, turn on the light-sensing gain sub-mode based on the light-sensing mode, and adjust the light-sensing gain parameters of the display in the light-sensing gain sub-mode; control the display to adjust the screen brightness according to the parameters adjusted by the user.
  • the controller in the light sensing mode, when the user adjusts the backlight brightness, the controller first calls the ambient light information collected by the light sensing device, and adjusts the PWM value in real time according to the ambient light information.
  • the controller The optical gain sub-mode is enabled, so the actual adjustment of the UI value is the optical gain parameter.
  • the controller writes the adjusted optical gain parameter into the optical gain database, and then calls the corresponding PWM value from the optical interval database.
  • the PWM value is multiplied by the light-sensing gain parameter and then returned to the controller to form the final adjusted PWM value, so that the display can display the brightness with the PWM value, so as to realize the adjustment of the screen brightness in the light-sensing mode.
  • the backlight mode when the user performs adjustment in the non-light-sensing mode, the backlight mode jumps to the user adjustment mode, and after the steps of adjusting the brightness of the display backlight, the method further includes: enabling the user adjustment mode and performing the display backlighting.
  • the user adjustment parameters of the brightness are stored in the first memory; when the display device is powered on, the current backlight brightness of the display device is adjusted according to the user adjustment parameters stored in the first memory.
  • the method further includes: store the light-sensing gain parameters adjusted in the light-sensing gain sub-mode into the second memory; adjust the light-sensing gain of the display device according to the light-sensing gain parameters stored in the second memory when the display device is turned on.
  • the actual PWM value of the backlight brightness corresponds to the UI value adjusted by the user.
  • the UI value mentioned in this application specifically refers to the backlight brightness value displayed on the user interface, and the backlight brightness bar displayed on the screen intuitively.
  • the PWM value of brightness is in a one-to-one mapping relationship.
  • intuitively adjusting the UI value the user is essentially adjusting the PWM value of the backlight brightness.
  • the UI value is set for the convenience of the operator's intuitive operation.
  • the step of adjusting the light-sensing gain parameter of the display in the light-sensing gain sub-mode further includes: if the screen brightness cannot meet the user's requirement for screen brightness after adjusting the light-sensing gain parameter of the display, asking whether to jump Go to the user adjustment mode, if you choose to jump to the user adjustment mode, the backlight brightness of the display will be adjusted in the user adjustment mode.
  • the PWM value of the screen brightness in the light sensing mode is calculated and converted to the UI value in the user adjustment mode. Adjust it to keep the brightness of the screen basically unchanged. It can be understood that due to the different setting logic of the UI value, the PWM values may not be completely equal. For example, after setting the UI value to an integer value from 0 to 30, there are actually 31 gears, which means that only 31 A specific PWM value, of course, if the gear interval is set to 0.5 or 0.1 or less, the total number of corresponding PWM values will be more.
  • the PWM value corresponding to the UI value of the screen brightness is calculated, and the PWM value before the jump is found by taking the absolute value difference and taking the minimum value.
  • the closest PWM value is the UI value after the jump. Since the PWM value is the closest to the PWM value before the jump, the screen brightness basically remains unchanged, even if there are subtle The difference does not appear flickering, and the smooth transition of screen brightness during the jump process is beneficial to the user's visual experience.
  • the step of acquiring the UI value of the dynamic frequency conversion mode is as follows: in the dynamic frequency conversion mode, the PWM value is based on the APL value of the currently displayed picture. Real-time change; the middle layer returns the UI value corresponding to the PWM value at this time before obtaining the screen brightness interface; calculates the PWM value corresponding to the UI value of the screen brightness, and finds the closest value to the real-time PWM value by taking the absolute value difference and taking the minimum value.
  • PWM value, the corresponding UI value is the UI value of dynamic frequency conversion mode.
  • the step of turning on a light-sensing gain sub-mode based on the light-sensing mode if it is currently in a light-sensing mode, and adjusting a light-sensing gain parameter of the display in the light-sensing gain sub-mode including: the user adjusts the light-sensing gain parameter of the display corresponding to the user-adjusted UI value, and the range of the user-adjusted UI value reflects the light-sensing gain gradient.
  • a preset coefficient makes the PWM value and UI value after light perception change subject to a certain degree of gain control, which not only retains the advantages of light perception, but also reflects the user's autonomous direct control, which further improves the user's experience.
  • the adjustment option of screen brightness when in bright mode, soft mode or dynamic frequency conversion mode, is set to gray, that is, in a non-adjustable state, but based on the concept of the present application, the adjustment option of screen brightness can be set to It is in an adjustable state, but in the above mode, once the screen brightness value is adjusted, the corresponding mode switch will be performed, and it will be switched to the user adjustment mode.
  • the screen brightness mode When the user adjusts the screen brightness, the screen brightness mode will automatically display as "" "User Adjustment Mode", thus realizing the goal of more convenient and flexible user adjustment of screen brightness in any range.
  • the display device may memorize the mode switching, and set whether to select the original mode or the switched user adjustment mode when the backlight mode is selected or turned on next time according to personal preference.
  • the embodiment of the present application also provides a display parameter adjustment method, which is applied to a display device, and the method includes:
  • Step 1901 Acquire the target environment color temperature collected by the light sensor.
  • Step 1902 Acquire target display parameters corresponding to the target ambient color temperature according to a preset display parameter correspondence, where the display parameter correspondence represents respective display parameters corresponding to different ambient color temperatures.
  • Step 1903 Adjust the display parameters of the target image to the target display parameters.
  • the target ambient color temperature is converted into a display color temperature; the location where the display color temperature is located is determined.
  • the target color temperature interval; the display parameters corresponding to the target color temperature interval are obtained according to the corresponding relationship of the display parameters, and used as the target display parameter.
  • the target ambient color temperature is converted into a display color temperature; the location where the display color temperature is located is determined.
  • the target color temperature interval; the display parameters corresponding to the target color temperature interval are obtained according to the corresponding relationship of the display parameters, and used as the target display parameter.
  • the step of converting the target ambient color temperature into a display color temperature is performed, it is determined whether the display color temperature is within a preset color temperature threshold; if so, a target color temperature interval corresponding to the display color temperature is determined. steps; if not, do not process.
  • the display in response to an instruction input by a user to instruct to display an image function interface, the display is controlled to display an image function interface, the image function interface includes several image function options including an ambient color temperature adjustment function; when detecting When the user inputs the selection instruction for selecting the ambient color temperature adjustment function in the image function interface, the step of determining the target display parameter corresponding to the target ambient color temperature is performed.
  • the target ambient color temperature is converted into ambient brightness in response to an instruction input by the user to instruct to turn on the ambient brightness adjustment function; the ambient brightness is determined; The target brightness interval in which it is located; when the display is a first-type display, obtain a target PLC curve corresponding to the target brightness interval and adjust the backlight brightness of the display device according to the target PLC curve; when the display is a second-type display, Obtain the target brightness corresponding to the target brightness interval and adjust the backlight brightness of the display device to the target brightness; obtain the target gamma curve corresponding to the target brightness interval and adjust the target image according to the target gamma curve.
  • the brightness of each pixel when the display is a first-type display, obtain a target PLC curve corresponding to the target brightness interval and adjust the backlight brightness of the display device according to the target PLC curve; when the display is a second-type display, Obtain the target brightness corresponding to the target brightness interval and adjust the backlight brightness of the display device to the target brightness; obtain the target gamma curve
  • the step of acquiring the PLC curve corresponding to the target brightness interval acquiring an initial PLC curve of the display device; acquiring the PLC curve offset corresponding to the target brightness interval according to a preset PLC curve offset relationship
  • the initial PLC curve is adjusted according to the PLC curve offset to obtain the target PLC curve.
  • the step of obtaining a target gamma curve corresponding to the target brightness interval obtaining an initial gamma curve of a display device; obtaining the target brightness interval corresponding to a preset gamma curve offset relationship gamma curve offset; adjust the initial gamma curve according to the gamma curve offset to obtain a target gamma curve.
  • the step of determining the target color temperature interval in which the display color temperature is located it is determined whether the target brightness interval is a preset brightness interval; if the target brightness interval is a preset brightness interval, Then use the display parameter corresponding to the first color temperature interval as the target display parameter, and perform the step of adjusting the display parameter of the target image to the target display parameter; if the target brightness interval is not the preset brightness interval, perform The step of obtaining the display parameters corresponding to the target color temperature interval according to the corresponding relationship of the display parameters.
  • the target brightness interval is a preset brightness interval; if the target brightness interval is a preset brightness interval, Then when the display is the first type of display, obtain the first PLC curve corresponding to the first brightness interval and adjust the backlight brightness of the display device according to the first PLC curve, and when the display is the second type of display, obtain the first PLC curve.
  • the first brightness corresponding to the brightness interval and adjust the backlight brightness of the display device to the first brightness obtain the first gamma curve corresponding to the first brightness interval and adjust each of the target images according to the first gamma curve brightness of a pixel.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Controls And Circuits For Display Device (AREA)

Abstract

Certains modes de réalisation de la présente demande divulguent un dispositif d'affichage et un procédé de réglage de paramètre d'affichage. Le dispositif d'affichage comprend un afficheur, un capteur optique et un dispositif de commande. L'afficheur est conçu pour afficher une image cible; le capteur optique est conçu pour acquérir une température de couleur ambiante de l'environnement où se trouve le dispositif d'affichage; et le dispositif de commande est configuré pour : obtenir une température de couleur ambiante cible acquise par le capteur optique, obtenir, selon une correspondance de paramètre d'affichage prédéfinie, un paramètre d'affichage cible correspondant à la température de couleur ambiante cible, puis régler le paramètre d'affichage de l'image cible au paramètre d'affichage cible, de telle sorte que le dispositif d'affichage puisse régler automatiquement le paramètre d'affichage.
PCT/CN2022/072289 2021-02-02 2022-01-17 Dispositif d'affichage et procédé de réglage de paramètre d'affichage WO2022166567A1 (fr)

Applications Claiming Priority (6)

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CN202110143233.7 2021-02-02
CN202110143233.7A CN112908273A (zh) 2021-02-02 2021-02-02 一种显示设备及背光调整方法
CN202111170228.1A CN115953965A (zh) 2021-10-08 2021-10-08 显示设备和显示参数调整方法
CN202111170228.1 2021-10-08
CN202111461428.2A CN116229906A (zh) 2021-12-02 2021-12-02 显示设备及背光模式融合控制方法
CN202111461428.2 2021-12-02

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