Display device and method of display brightness control

Abstract

The application discloses a display device and a display brightness control method, comprising a display, a distance sensor and a controller. The controller is configured to control the distance sensor to detect whether a user exists in a first distance interval, control the display to adopt eye protection light control if the user exists in the first distance interval, control to detect whether a user exists in a second distance interval if the user does not exist, control the display to adopt distance value light control if the user exists in the second distance interval, control to detect whether a user exists in a third distance interval if the user does not exist, control the display to adopt standard brightness value light control if the user exists in the third distance interval, and control to reduce the display brightness of the display if the user does not exist. In the application, the display brightness of the display is adjusted according to whether a user exists in front of the display device and the distance between the user and the display device, so that the user experience is improved while the eyes are protected.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a display device and a method for controlling display brightness. Background Technology

[0002] A display device is a device that enables two-way human-computer interaction, integrating multiple functions such as audio-visual, entertainment, and data processing. It displays a user interface on a screen and interacts with the user and exchanges information through that interface. The display brightness is typically achieved through backlighting. Backlighting refers to illumination from the side or back of the monitor to increase its brightness in low-light environments. When users view content displayed on a screen, excessive brightness can strain their eyes, while insufficient brightness can cause eye fatigue. Therefore, the display brightness significantly impacts the user's experience with the display device. Summary of the Invention

[0003] This application provides a display device and a method for controlling display brightness, in order to solve the technical problem of adjusting the display brightness of a monitor in the related art.

[0004] To address the aforementioned technical problems, some embodiments of this application disclose the following technical solutions:

[0005] In a first aspect, some embodiments of this application disclose a display device, the display device comprising: a display; a distance sensor configured to detect the distance between a user and the display device; and a controller configured to: control the distance sensor to detect whether a user exists within a first distance interval; control the display to employ eye-protection light control when a user exists within the first distance interval; control the distance sensor to detect whether a user exists within a second distance interval when no user exists within the first distance interval; control the display to employ distance-based light control when a user exists within the second distance interval; control the distance sensor to detect whether a user exists within a third distance interval when no user exists within the second distance interval; control the display to employ standard brightness-based light control when a user exists within the third distance interval; and control the display brightness of the display to decrease when no user exists within the third distance interval; wherein the first distance interval, the second distance interval, and the third distance interval are sequentially moved further away from the display device, and the display brightness of the eye-protection light control, the distance-based light control, and the standard brightness-based light control is sequentially increased.

[0006] Secondly, some embodiments of this application disclose a method for controlling display brightness, the method comprising:

[0007] The system controls a distance sensor to detect the presence of a user within a first distance interval. When a user is present in the first distance interval, the system controls the display to use eye-protection light control. When no user is present in the first distance interval, the system controls the distance sensor to detect the presence of a user within a second distance interval. When a user is present in the second distance interval, the system controls the display to use distance-based light control. When no user is present in the second distance interval, the system controls the distance sensor to detect the presence of a user within a third distance interval. When a user is present in the third distance interval, the system controls the display to use standard brightness light control. When no user is present in the third distance interval, the system controls the display brightness to decrease. The first, second, and third distance intervals are sequentially moved further away from the display device, and the display brightness of the eye-protection light control, distance-based light control, and standard brightness light control is sequentially increased.

[0008] Compared with related technologies, the beneficial effects of this application are as follows:

[0009] This application provides a display device and a method for controlling display brightness. The display device is equipped with a distance sensor that can detect the distance between a user and the display device. The display device can determine whether a user is in front of it through the distance sensor, and if a user is present, it can obtain the distance value between the user and the display device. When no user is in front of the display device, the display device reduces the display brightness to save energy. When a user is in front of the display device, the distance between the user and the display device is further determined. If the user is within a first distance range relatively close to the display device, the display device adjusts the display brightness to the lowest level through eye protection dimming. If the user is within a third distance range relatively far from the display device, the display device adjusts the display brightness to the brightest level through standard brightness dimming. If the user is within a second distance range, the display device fine-tunes the display brightness through distance-based dimming. In this application, the display device adjusts the display brightness based on whether a user is in front of it and the distance between the user and the display device, providing a better user experience while protecting the user's eyes.

[0010] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0011] To more clearly illustrate the technical solution of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1This is a schematic diagram illustrating an operational scenario between a display device and a control device according to one or more embodiments of this application;

[0013] Figure 2 This is a hardware configuration block diagram of a display device 200 according to one or more embodiments of this application;

[0014] Figure 3 This is a hardware configuration block diagram of a control device 100 according to one or more embodiments of this application;

[0015] Figure 4 This is a schematic diagram of the software configuration in a display device 200 according to one or more embodiments of this application;

[0016] Figure 5 This is a schematic diagram showing the icon control interface of an application in a display device 200 according to one or more embodiments of this application;

[0017] Figure 6 This is a schematic diagram of a distance interval division scenario according to one or more embodiments of this application;

[0018] Figure 7 This is a flowchart illustrating a method for controlling display brightness according to one or more embodiments of this application;

[0019] Figure 8 This is a schematic diagram of the basic structure of a laser television according to one or more embodiments of this application;

[0020] Figure 9 This is a schematic diagram of the basic structure of a liquid crystal television according to one or more embodiments of this application;

[0021] Figure 10 This is a schematic diagram illustrating the display effect of an eye protection prompt according to one or more embodiments of this application;

[0022] Figure 11 This is a schematic diagram of the control flow for display brightness within a first distance interval according to one or more embodiments of this application;

[0023] Figure 12 This is a schematic diagram of the control flow for display brightness within a second distance interval according to one or more embodiments of this application;

[0024] Figure 13 This is a schematic diagram of the control flow for display brightness within a third distance interval according to one or more embodiments of this application;

[0025] Figure 14 This is a schematic diagram of the control flow of an unmanned state algorithm according to one or more embodiments of this application;

[0026] Figure 15This is an overall architecture diagram of display brightness control according to one or more embodiments of this application. Detailed Implementation

[0027] To make the objectives, implementation methods and advantages of this application clearer, the exemplary implementation methods of this application will be clearly and completely described below with reference to the accompanying drawings of the exemplary embodiments of this application. Obviously, the described exemplary embodiments are only some embodiments of this application, and not all embodiments.

[0028] Based on the exemplary embodiments described in this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of the appended claims. Furthermore, although the disclosures in this application are presented by way of one or more exemplary examples, it should be understood that each aspect of these disclosures can constitute a complete implementation on its own. It should be noted that the brief descriptions of terminology in this application are merely for the convenience of understanding the embodiments described below, and are not intended to limit the implementation of this application. Unless otherwise stated, these terms should be understood in their ordinary and common meaning.

[0029] Figure 1 This is a schematic diagram illustrating an operational scenario between a display device and a control device according to one or more embodiments of this application, such as... Figure 1 As shown, a user can operate the display device 200 via a mobile terminal 300 and a control device 100. The control device 100 can be a remote control, and communication between the remote control and the display device includes infrared protocol communication, Bluetooth protocol communication, wireless or other wired methods to control the display device 200. The user can input user commands through buttons on the remote control, voice input, control panel input, etc., to control the display device 200. In some embodiments, a mobile terminal, tablet computer, computer, laptop computer, and other smart devices can also be used to control the display device 200.

[0030] In some embodiments, the mobile terminal 300 can install software applications with the display device 200 to achieve connection and communication via network communication protocols, enabling one-to-one control operations and data communication. Audio and video content displayed on the mobile terminal 300 can also be transmitted to the display device 200 for synchronous display. The display device 200 also communicates with the server 400 via various communication methods. The display device 200 can communicate via a local area network (LAN), wireless local area network (WLAN), and other networks. The server 400 can provide various content and interactive features to the display device 200. The display device 200 can be a liquid crystal display, an OLED display, or a projection display device. In addition to providing broadcast television reception functions, the display device 200 can also be equipped with a smart network television function that provides computer support.

[0031] Figure 2 This is a hardware configuration block diagram of a display device 200 according to one or more embodiments of this application. Figure 2 As shown, 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 user input commands and convert them into commands that the display device 200 can recognize and respond to, acting as an intermediary for interaction between the user and the display device 200. The communication interface 130 is used for external communication and includes at least one of a Wi-Fi chip, a Bluetooth module, NFC, or a replacement module. The user input / output interface 140 includes at least one of a microphone, a touchpad, a sensor, buttons, or a replacement module.

[0032] Figure 3 This is a hardware configuration block diagram of a control device 100 according to one or more embodiments of this application. Figure 3 The display device 200 shown includes at least one of the following: a tuner / demodulator 210, a communicator 220, a detector 230, an external device interface 240, a controller 250, a display 260, an audio output interface 270, a memory, a power supply, and a user interface 280. The controller includes a central processing unit, a video processor, an audio processor, a graphics processor, RAM, ROM, and a first to nth interface for input / output. The display 260 can be at least one of a liquid crystal display, an OLED display, a touch display, and a projection display, and can also be a projection device and a projection screen. The tuner / demodulator 210 receives broadcast television signals via wired or wireless reception and demodulates audio and video signals, such as EPG data signals, from multiple wireless or wired broadcast television signals. The detector 230 is used to collect signals from the external environment or signals interacting with the external environment. The controller 250 and the tuner / demodulator 210 can be located in different separate devices; that is, the tuner / demodulator 210 can also be located in an external device of the main device where the controller 250 is located, such as an external set-top box.

[0033] In some embodiments, the controller 250 controls the operation of the display device and responds to user operations through various software control programs stored in memory. The controller 250 controls the overall operation of the display device 200. The user can input user commands through a graphical user interface (GUI) displayed on the monitor 260, and the user input interface receives the user input commands through the GUI. Alternatively, the user can input user commands by inputting specific sounds or gestures, and the user input interface receives the user input commands by recognizing the sounds or gestures through sensors.

[0034] In some embodiments, a "user interface" is the medium through which an application or operating system interacts and exchanges information with a user, enabling the conversion between the internal form of information and a form acceptable to the user. A common form of user interface is the graphical user interface (GUI), which refers to a user interface related to computer operation displayed graphically. It can be an icon, window, control, or other interface element displayed on the screen of an electronic device. Controls can include at least one of the visual interface elements such as icons, buttons, menus, tabs, text boxes, dialog boxes, status bars, navigation bars, and widgets.

[0035] Figure 4 This is a schematic diagram of the software configuration in a display device 200 according to one or more embodiments of this application, such as... Figure 4 As shown, the system is divided into four layers, from top to bottom: the Applications layer (referred to as the "Application Layer"), the Application Framework layer (referred to as the "Framework Layer"), the Android runtime and 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, Wi-Fi driver, USB driver, HDMI driver, sensor driver (such as fingerprint sensor, temperature sensor, pressure sensor, etc.), and power driver, etc.

[0036] Figure 5 This is a schematic diagram showing the icon control interface of an application in a display device 200 according to one or more embodiments of this application, such as... Figure 5 As shown, the application layer contains at least one application whose corresponding icon control can be displayed on the screen, 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 applications can provide live television from different signal sources. Video-on-demand applications can provide video from different storage sources. Unlike live TV applications, video-on-demand provides video display from certain storage sources. Media center applications can provide applications for playing various multimedia content. The application center can provide storage for various applications.

[0037] In some embodiments, the hardware or software architecture can be based on the description in the above embodiments, and in some embodiments it can be based on other similar hardware or software architectures, as long as the technical solution of this application can be implemented.

[0038] Based on the aforementioned display device 200, when a user views content displayed on the monitor 260, if the monitor 260's brightness is too bright, it will irritate the user's eyes; if the monitor 260's brightness is too dim, it will cause excessive eye strain. Therefore, the display brightness of the monitor 260 greatly affects the user's experience with the display device. To improve the user experience, some embodiments of this application provide a display device and a method for controlling display brightness.

[0039] Figure 6 This is a schematic diagram of a distance interval division scenario according to one or more embodiments of this application, combined with Figure 6 The display device 200 divides the distance between the user and the display device 200 based on eye protection and the detection range of the distance sensor. For eye protection, the display device 200 sets the minimum distance a user can maintain from the display device 200 to view the content as a first distance value, such as 0.2 meters; the range of 0-0.2 meters is then the first distance interval. Based on the detection range of the distance sensor and the maximum distance a user can maintain from the display device 200 to view the content, a third distance value is set, such as 6 meters. A second distance value is set between the first and third distance values; the range between the first and second distance values ​​is the second distance interval, and the range between the second and third distance values ​​is the third distance interval. For example, if the second distance value is set to 4 meters, then the second distance interval is 0.2-4 meters, and the third distance interval is 4-6 meters. That is, the first, second, and third distance intervals are sequentially farther away from the display device 200.

[0040] In some embodiments, when the distance sensor detects that a user is in front of the display device 200, the distance between the user and the display device 200 is obtained, and the distance range in which the user is located is determined.

[0041] In some embodiments, when detecting the distance interval to which a user belongs, the display device 200 sets a priority, that is, the priority of the first distance interval is higher than the priority of the second distance interval, and the priority of the second distance interval is higher than the priority of the third distance interval. Therefore, the display device 200 first controls the detection of whether a user exists in the first distance interval. Only if no user exists in the first distance interval does it control the detection of whether a user exists in the second distance interval. If no user exists in both the first and second distance intervals, it finally detects whether a user exists in the third distance interval.

[0042] In some embodiments, if there are multiple users in front of the display device 200, the display device 200 may prioritize the user closest to the display 260. For example, if there are users in both the first distance range and the third distance range, the user in the first distance range will be prioritized for light control.

[0043] In some embodiments, the display device 200 uses different light control methods depending on the distance range the user is in. For the first distance range, the second distance range, and the third distance range, the display device 200 adjusts the display brightness of the monitor 260 through eye protection light control, distance value light control, and standard brightness value light control, respectively. The display brightness of eye protection light control, distance value light control, and standard brightness value light control is increased sequentially. The following describes the specific steps.

[0044] The process of display brightness control provided in some embodiments of this application will now be described with reference to the accompanying drawings.

[0045] Figure 7 This is a flowchart illustrating a method for controlling display brightness according to one or more embodiments of this application. In some embodiments, this application provides a display device 200 including a display 260, a distance sensor, and a controller 250, wherein the controller 250 is communicatively connected to the display 260 and the distance sensor. The controller 250 is configured to perform... Figure 6 The process of controlling display brightness. Combined with... Figure 7 The brightness control process for this display is as follows:

[0046] S701: Control the distance sensor to detect whether there is a user within the first distance interval.

[0047] In some embodiments, the distance sensor is used to detect whether a user is in front of the display device 200, and can also detect the distance between the user and the display device 200. Here, "in front of the display device 200" does not only refer to the area directly in front of the display device 200, but can refer to the range that the distance sensor can detect. Of course, in order to more comprehensively detect whether a user is in front of the display device 200, multiple distance sensors can be installed on the display device 200.

[0048] In some embodiments, the installation location of the distance sensor varies depending on the type of display device 200.

[0049] In some embodiments, taking a laser TV as an example, the display device 200 Figure 8 This is a schematic diagram of the basic structure of a laser TV according to one or more embodiments of this application, combined with... Figure 8As shown, a laser TV consists of a screen and a main unit. The screen, also known as the monitor, is typically large, starting at 80 inches. Laser TVs use a laser light source integrated into the main unit. The main unit projects media resources onto the screen, where the image is reflected before reaching the viewer's eyes. In a laser TV, a distance sensor is mounted on the main unit, and the controller 250 controls the sensor to detect the distance between the user and the main unit. The controller 250 controls the light output based on this distance, which in turn controls the light output based on the distance between the user and the laser light source. Brightness adjustment is achieved by adjusting the luminous flux of the optical engine emitting the laser light source.

[0050] In some embodiments, taking an LCD TV as an example, the display device 200 Figure 9 This is a schematic diagram of the basic structure of a liquid crystal television according to one or more embodiments of this application. Figure 9 As shown, a distance sensor is mounted on the display 260, which is configured to display a user interface through which the user views media resources presented by the LCD TV. The controller 250 controls the distance sensor to detect the distance between the user and the display 260, and controls the light based on this distance. When controlling the light based on distance, if the display 260 uses backlighting (i.e., illumination from the side or back of the display 260 to increase its brightness in low-light environments), the brightness of the display 260 can be adjusted by adjusting the backlight source. In some embodiments, in addition to detecting the distance between the user and the display using a distance sensor, the LCD TV can also use a binocular camera to capture the depth distance between the user and the display, and can also utilize UWB (Ultra Wide Band) technology or AOA (Activity On Arrow) technology to locate the user in front of the display.

[0051] In some embodiments, the display device 200 may have a distance sensor internally or externally connected, such as integrating the distance sensor inside the laser TV host or installing it externally. Alternatively, the distance sensor may be mounted on the bezel of the LCD TV display.

[0052] In some embodiments, the display device 200 first controls the distance sensor to detect whether a user exists within a first distance interval that is relatively close to the display device 200.

[0053] S702: When a user is present in the first distance interval, control the display to use eye protection light control; when no user is present in the first distance interval, control the distance sensor to detect whether a user is present in the second distance interval.

[0054] In some embodiments, if the distance sensor detects the presence of a user within a first distance range, it sends a message to the controller 250 indicating the presence of a user within the first distance range. Upon receiving the message, the controller 250 controls the display 260 to use eye-protection light control.

[0055] In some embodiments, the display device 200 is equipped with an eye-protection light control switch, which has a child mode and an adult mode. For example, the user interface may have an eye-protection light control switch setting option, which the user can choose to turn on or off. When turning on, the user can also choose to enable either child mode or adult mode. In some embodiments, to maximize eye protection, the switch can be set to adult mode by default.

[0056] In some embodiments, when a user clicks to activate the adult mode within the eye protection light control switch, the display device 200 receives a trigger command from the user indicating that the adult mode in the eye protection light control switch has been activated. The display device 200 performs distance detection. If the user is within the first distance range, it indicates that the user is too close to the display device 200, which may cause significant eye damage. In this case, the display device 200 controls the monitor 260 to display a countdown timer for screen-off, and after the countdown ends, adjusts the monitor's brightness to 0 to turn off the monitor. Figure 10 This is a schematic diagram illustrating the display effect of an eye protection prompt according to one or more embodiments of this application, such as... Figure 10 As shown, when the user is too close to the display device 200, the display device 200 displays a countdown timer for screen-off in the form of a floating window on the playback interface currently viewed by the user.

[0057] In some embodiments, when a user clicks to activate the child mode within the eye protection dimming switch, the display device 200 receives an input trigger command indicating that the child mode in the eye protection dimming switch is activated. The display device 200 performs distance detection; if the user is within the first distance range, it controls the display device to announce an upcoming screen-off warning, and after the announcement, adjusts the display brightness to 0 to turn off the display. For example, the display device 200 announces through a speaker: "Eye protection warning, the device will turn off the screen in 10 seconds."

[0058] In some embodiments, when the user does not turn on the eye protection light control switch, and the display device 200 detects that it has not received an input trigger command indicating that the eye protection light control has been turned on, it will not intervene even if the user is within the first distance range, and will still control the display 260 to maintain the current display brightness.

[0059] The process of controlling light to protect the human eye within the first distance interval described above will be further explained below with reference to the accompanying drawings.

[0060] Figure 11 This is a schematic diagram illustrating the control flow of display brightness within a first distance interval according to one or more embodiments of this application. Figure 11 As shown, the display device 200 detects whether the eye-protection light control switch is currently on. If the user has not turned on the eye-protection light control switch, the display device 200 will not interfere with the brightness control of the monitor 260 when the user is within the first distance range. If the user has turned on the eye-protection light control switch, the display device 200 detects the presence of the user within the first distance range via the distance sensor, and further detects the currently activated eye-protection light control switch mode. If it is adult mode, a countdown prompt is displayed via a floating window; if it is child mode, an eye-protection voice prompt is displayed. After the prompt, the display device 200 controls the monitor 260 to turn off.

[0061] In some embodiments, when a user is detected to be absent within a first distance interval that is close to the display device 200, the distance sensor sends a message to the controller 250 indicating that no user is present in the first distance interval, and the controller 250 then controls the distance sensor to detect whether a user is present in a second distance interval.

[0062] S703: When a user is present in the second distance interval, control the display to use distance-based light control; when no user is present in the second distance interval, control the distance sensor to detect whether a user is present in the third distance interval.

[0063] In some embodiments, if the distance sensor detects the presence of a user within the second distance range, it sends a message to the controller 250 indicating the presence of a user within the second distance range. Upon receiving the message, the controller 250 controls the display 260 to use distance-based light control.

[0064] In some embodiments, the display device 200 stores inherent parameters of the device itself in the data separation module, such as display size and memory size, and stores a brightness control curve between distance and display brightness. Here, distance refers to the distance between the user and the display device 200. That is to say, any size display has a brightness control curve, in which the correspondence between distance and display brightness value is mapped.

[0065] In some embodiments, if the display device 200 detects that the user is within a second distance interval but not within the first or third distance interval via a distance sensor, it obtains the size of the display 260 from the data separation module. The display device 200 further obtains a brightness control curve corresponding to the size of the display 260. Based on the distance value between the user and the display device 200 detected by the distance sensor, a corresponding brightness value is obtained from the brightness control curve. The display device 200 can control the display 260 to adjust to the corresponding brightness value via I2C commands. In other words, within the second distance interval, the display device 200 can obtain the distance between the user and the display device 200 in real time and fine-tune the display brightness of the display 260 based on the distance value.

[0066] Figure 12 This is a schematic diagram illustrating the control flow of display brightness within a second distance interval according to one or more embodiments of this application. Figure 12 As shown, the display device 200 detects whether a user exists within the second distance range using a distance sensor. If a user is present within the second distance range, the display device 200 retrieves the size of the display from the data separation module and further retrieves the brightness control curve corresponding to that size. The display device 200 obtains the distance value between the user and the display device 200 based on the distance sensor, retrieves the brightness value corresponding to that distance value from the brightness control curve, and finally sets the brightness of the backlight source based on that brightness value.

[0067] In some embodiments, when the distance sensor detects that the user is in front of the display device 200 and the distance between the user and the display device 200 is constantly changing, that is, when the user is walking back and forth in front of the display device 200, in order to prevent the display from flickering due to the display brightness control, the display device 200 controls the display 260 to adjust the display brightness to a fixed brightness value.

[0068] In some embodiments, within a preset time period, the display device 200 acquires the distance value detected by the distance sensor at preset time intervals. Based on the distance interval to which the distance value belongs, the display brightness value of the display 260 corresponding to the distance value is acquired. The change in display brightness values ​​corresponding to adjacent distance values ​​is detected. When the change in display brightness values ​​is greater than a preset change value, the display brightness of the display 260 is adjusted to a fixed brightness value, wherein the fixed brightness value refers to the average of the acquired display brightness values. When the change in display brightness values ​​is less than the preset change value, the display brightness of the display 260 is adjusted to the brightness value corresponding to the current distance between the user and the display 260.

[0069] For example, within a 3-second timeframe, the display device 200 detects the change in distance between the user and the display device 200 every 200ms, acquiring a first brightness value and a second brightness value. The first brightness value refers to the brightness value corresponding to the distance between the user and the display device 200 at the 1st ms, and the second brightness value refers to the brightness value corresponding to the distance between the user and the display device 200 at the 200th ms. The difference between |first brightness value - second brightness value| is calculated to obtain the first difference. Then, the third brightness value is acquired, i.e., the brightness value corresponding to the distance between the user and the display device 200 at the 400th ms, and the difference between |second brightness value - third brightness value| is calculated to obtain the second difference. This process continues, calculating the difference between the display brightness values ​​corresponding to adjacent distance values. Finally, the positive and negative values ​​of multiple differences are statistically analyzed. If the value continuously changes between positive and negative within 3 seconds, the current display brightness of the monitor 260 is set to a fixed brightness value and no further fluctuations are made to ensure that the screen does not flicker. If the value does not change significantly within 3 seconds (no positive or negative fluctuations), the brightness will be set according to the display brightness control method corresponding to the user's distance range. Here, the fixed brightness value refers to the average brightness value calculated based on the first brightness value, the second brightness value, the third brightness value, and so on.

[0070] In some embodiments, when no user is detected in the second distance interval, the distance sensor sends a message to the controller 250 indicating that no user is detected in the second distance interval, and the controller 250 then controls the distance sensor to detect whether a user is detected in the third distance interval.

[0071] S704: When a user is present in the third distance range, control the display to use a standard brightness value for light control; when no user is present in the third distance range, control the display brightness to be reduced.

[0072] Figure 13 This is a schematic diagram of the control flow for display brightness within a third distance interval according to one or more embodiments of this application, combined with... Figure 13 If a user is present within the third distance range, the distance sensor sends a message to the controller 250 indicating the presence of a user within the third distance range. Upon receiving the message, the controller 250 controls the display 260 to use a standard brightness value for light control, that is, adjusts the display brightness of the display 260 to the normal display brightness. Within the third distance range, excessive brightness adjustment will increase the energy consumption of the display device 200 and reduce the lifespan of the light source device. Therefore, the display device 200 can be directly controlled to control the display 260 at a normal display brightness.

[0073] In some embodiments, when there is no user within the third distance interval, that is, when the distance sensor detects that there is no user in front of the display device 200, the display device 200, upon receiving a message indicating that there is no user in front of it, controls to reduce the brightness of the backlight source or reduce the luminous flux of the optical engine, thereby controlling the display 260 to reduce its display brightness, so that the display 260 enters an energy-saving mode and reduces energy consumption. In some embodiments, when the display device 200 detects that there is no user in front of it, it can directly set the brightness of the backlight source or the luminous flux of the optical engine to 0, that is, control the display device 200 to enter a screen-off state.

[0074] In some embodiments, the display device 200 has a screensaver program. For example, in specific scenarios such as art galleries or retail displays, if the display device 200 enables the screensaver program, it can display specific image content such as art paintings on the display 260.

[0075] In some embodiments, the display device 200 is configured with a first preset duration and a second preset duration, wherein the second preset duration is longer than the first preset duration. This preset duration is used for comparison with a period of inactivity. If the display device 200 has a screensaver enabled, and the distance sensor detects that there is no user in front of the display device 200, the display device 200, upon receiving a message indicating that there is no user in front of it, starts a timer to obtain the inactivity duration. If the inactivity duration exceeds the first preset duration, the display device 200 controls the display 260 to display a screensaver image. While displaying the screensaver image, the timer continues. When the inactivity duration exceeds the second preset duration, the display device 200 adjusts the display brightness of the display 260 to 0, thus turning off the display 260.

[0076] In some embodiments, if the display device 200 has not enabled the screen saver program, when it receives a message indicating that there is no user in front of the display device 200, the display device 200 controls the start of a timer to obtain the duration of no user access. When the duration of no user access exceeds a second preset time, the display device 200 turns off the display 260.

[0077] In some embodiments, when the distance sensor detects that there is no user in front of the display device 200, the display device 200 may also receive a message from the distance sensor indicating that there is a user in front of it. For example, a user may temporarily leave the viewing area while watching a program displayed on the display device 200 due to some temporary circumstances, and then return to the display device 200 to continue watching the program after dealing with the temporary circumstances. In this case, the display device 200 predicts the user's departure based on the user's movement speed and the change in distance between the user and the display device 200. If the distance between the user and the display device 200 remains unchanged, it indicates that the user may have sat down to watch the content displayed on the display device 200. In this case, the display 260 is controlled to maintain the current display brightness, and the timer is paused, and the duration of absence is no longer acquired. If the distance between the user and the display device 200 gradually increases at a speed exceeding a preset movement speed, that is, the user enters the area in front of the display device 200 and then quickly leaves, the user's presence can be ignored, and the timer can continue to be controlled to acquire the duration of absence.

[0078] The above-described unmanned control process will be further explained below with reference to the accompanying drawings.

[0079] Figure 14 This is a schematic diagram of the control flow of an unmanned state algorithm according to one or more embodiments of this application. Figure 14 As shown, when the display device 200 receives a message indicating that there is no user in front of it, it starts a timer. If no one is currently present, time T1 is started. During the timer, the display device 200 uses a distance sensor to detect whether anyone is in front of it. If no one is present, the timer continues until time T1, at which point the display device 200 turns off the screen. When someone appears, the display device 200 calculates the distance to determine if the distance between the user and the display device 200 has increased. If the distance between the user and the display device 200 has not increased, the display device 260 maintains its current brightness and remains on. If the distance between the user and the display device 200 gradually increases, the display device 200 predicts whether the user will leave within time T2 based on the user's movement speed. If the user moves at a relatively fast speed and the distance between them increases, it is determined that the user will leave within time T2, and distance detection continues. If the user moves slowly, it is determined that the user will not leave the area, and the monitor 260 is controlled to maintain the current brightness and continue to be lit.

[0080] The above display brightness control process is further described below.

[0081] Figure 15 This is an overall architecture diagram of display brightness control according to one or more embodiments of this application. Figure 15As shown, the display device 200 has a background main thread for display brightness control. This main thread includes a distance detection module, a light control decision module, a light control execution module, a timer module, and a motion trend detection module. After the display device 200 is powered on, the main thread for display brightness control is started in the background and runs continuously, adjusting the light in real time based on the distance between the user and the display device 200. The distance detection module first reads distance control distribution data from the data separation data storage, presets the duration of inactivity and preset thresholds for brightness related to tolerable motion trends. The distance control distribution data includes distance intervals divided according to the distance range detected by the distance sensor, and also obtains the distance value between the user and the display device 200 detected by the distance sensor in real time. Other modules can obtain relevant data as needed from the distance detection module.

[0082] When a user is present in front of the display device 200, the distance detection module determines the current distance range of the user based on the real-time distance value between the user and the display device 200, and sends a message indicating which distance range the user is located in to the light control decision module. Upon receiving the message, the light control decision module selects a specific light control method according to the light control strategy for each distance range, and feeds back the determined light control method to the light control execution module. The light control execution module adjusts the laser / backlight brightness, stops laser / backlight emission, or controls laser / backlight emission based on the received light control method, thereby controlling the current display brightness.

[0083] When there is no user in front of the display device 200, the display device 200 controls the timer module to perform timing based on the preset unoccupied duration obtained from the distance detection module. Here, the light control decision module can... Figure 14 The unmanned state algorithm shown selects the light control method, and the light control execution module performs the light control.

[0084] When a user is in motion in front of the display device 200, the display device 200 controls the motion trend detection module to estimate the motion trend based on data obtained from the distance detection module. This motion trend estimation includes the acceleration of distance change, calculated as the ratio of the difference in distance between the user and the display device 200 before and after movement to the time taken for movement; the estimated time it will take for the user to move out of the current distance range in the direction of movement; and the calculation of a fixed brightness value as the distance between the user and the display device 200 continuously changes. The light control decision module selects the light control method based on the user's current distance range and motion trend, and the light control execution module then performs the light control.

[0085] In this application, the display device 200 adjusts the display brightness of the monitor 260 based on whether a user is present in front of the display device 200 and the distance between the user and the display device 200. This ensures eye safety, especially during close-range viewing, thus providing a superior user experience while protecting the user's eyes. Furthermore, this application can calculate and predict the user's dynamics, further enhancing the precision of the brightness adjustment of the monitor 260.

[0086] Based on the same inventive concept as the aforementioned display device, some embodiments of this application also provide a method for controlling display brightness. The method includes: a display device 200 controlling a distance sensor to first detect whether a user exists within a first distance interval. When a user exists within the first distance interval, the display device 200 controls the display 260 to use eye-protection light control; when no user exists within the first distance interval, the display device 200 then controls the distance sensor to detect whether a user exists within a second distance interval. When a user exists within the second distance interval, the display device 200 controls the display 260 to use distance-based light control; when no user exists within the second distance interval, the display device 200 finally controls the distance sensor to detect whether a user exists within a third distance interval. When a user exists within the third distance interval, the display device 200 controls the display 260 to use standard brightness value light control; when no user exists within the third distance interval, the display device 200 controls the reduction of the display brightness of the display 260. The first distance interval, the second distance interval, and the third distance interval are successively moved away from the display 260, and the display brightness of the human eye protection light control, the distance value light control, and the standard brightness value light control is successively increased.

[0087] For ease of explanation, the above description has been provided in conjunction with specific embodiments. However, the discussion in some embodiments above is not intended to be exhaustive or to limit the embodiments to the specific forms disclosed above. Various modifications and variations can be obtained based on the above teachings. The selection and description of the above embodiments are for the purpose of better explaining the principles and practical applications, thereby enabling those skilled in the art to better utilize the embodiments and various different variations of the embodiments suitable for specific application considerations.

Claims

1. A display device, characterized by comprising: The display device comprises: a display; a distance sensor configured to detect a distance between a user and the display device; a controller configured to: control the distance sensor to detect whether there is a user in a first distance interval; when there is a user in the first distance interval, control the display to adopt eye protection dimming; when there is no user in the first distance interval, control the distance sensor to detect whether there is a user in a second distance interval; when there is a user in the second distance interval, control the display to adopt distance value dimming, wherein the size of the display and a luminance control curve corresponding to the size of the display are obtained, the luminance control curve has a corresponding relationship between distance and luminance value mapped therein, distance refers to the distance between the user and the display device; according to the distance value between the user and the display device detected by the distance sensor, a corresponding luminance value is obtained in the luminance control curve, and the display is controlled to be adjusted to the corresponding luminance value; when there is no user in the second distance interval, control the distance sensor to detect whether there is a user in a third distance interval; when there is a user in the third distance interval, control the display to adopt standard luminance value dimming; when there is no user in the third distance interval, control to reduce the display brightness of the display; wherein the first distance interval, the second distance interval and the third distance interval are sequentially away from the display device, and the display brightness of the eye protection dimming, the distance value dimming and the standard luminance value dimming is sequentially increased.

2. The display device of claim 1, wherein, In the step of controlling to reduce the display brightness of the display when there is no user in the third distance interval, the controller is configured to: control to start timing when the distance sensor detects that there is no user in front of the display device, to obtain an unattended time length; if the unattended time length exceeds a first preset time length, control the display to display a screen saver image; if the unattended time length exceeds a second preset time length, control the display to turn off the screen, wherein the second preset time length is greater than the first preset time length.

3. The display device of claim 2, wherein, After the control starts timing, the controller is further configured to: receive a message sent by the distance sensor that there is a user in front of the display device, and make a departure prediction according to the user moving speed and the distance change between the user and the display device; if the distance between the user and the display device is unchanged, control the display to maintain the current display brightness and pause the timing; if the distance between the user and the display device gradually increases at a speed exceeding a preset moving speed, continue the timing.

4. The display device of claim 1, wherein, In the step of controlling the display to adopt eye protection dimming when there is a user in the first distance interval, the controller is configured to: when a trigger instruction representing an adult mode of starting eye protection dimming is received, if the user is in the first distance interval, control the display to display a screen-off countdown prompt, and after the screen-off countdown ends, control the display to turn off the screen. When a trigger instruction representing a child mode of opening human eye protection control light is input, if the user is in the first distance interval, the display device is controlled to broadcast a prompt of about to be turned off, and after the broadcast is ended, the display is controlled to be turned off.

5. The display device of claim 1, wherein, The controller is further configured to: When no trigger instruction representing a child mode of opening human eye protection control light is input, if the user is in the first distance interval, the display is controlled to maintain a current display brightness.

6. The display device of claim 1, wherein, The controller is further configured to: When the distance sensor detects that the user exists in front of the display device and the distance value between the user and the display device is constantly changing, the display is controlled to adjust the display brightness to a fixed brightness value.

7. The display device of claim 6, wherein, In the step of controlling the display to adjust the display brightness to a fixed brightness value when the distance value between the user and the display device is constantly changing, the controller is configured to: Within a preset time length, the distance value detected by the distance sensor is acquired every preset time interval; According to the distance interval to which the distance value belongs, the display brightness value corresponding to the distance value is acquired; The change value between the display brightness values corresponding to adjacent distance values is detected; When the change value between the display brightness values is greater than a preset change value, the display brightness of the display is adjusted to a fixed brightness value, wherein the fixed brightness value refers to the mean value of the acquired display brightness values; When the change value between the display brightness values is less than the preset change value, the display brightness of the display is adjusted to the brightness value corresponding to the current distance value between the user and the display.

8. The display device of claim 1, wherein, The controller is further configured to: When the display device is a laser television, the distance sensor is installed on a host, and the controller controls the distance sensor to detect the distance between the user and the host; When the display device is a liquid crystal television, the distance sensor is installed on a display, and the controller controls the distance sensor to detect the distance between the user and the display.

9. A method of displaying luminance control, characterized by, The method comprises: Controlling a distance sensor to detect whether a user exists in a first distance interval; When the user exists in the first distance interval, controlling a display to adopt human eye protection control light; when the user does not exist in the first distance interval, controlling the distance sensor to detect whether a user exists in a second distance interval; When the user exists in the second distance interval, controlling the display to adopt distance value control light, wherein the size of the display and a brightness control curve corresponding to the size of the display are acquired, the brightness control curve has a corresponding relationship between distance and brightness value mapped therein, distance refers to the distance between the user and the display; according to the distance value between the user and the display detected by the distance sensor, a corresponding brightness value is acquired in the brightness control curve, and the display is controlled to be adjusted to the corresponding brightness value; when the user does not exist in the second distance interval, controlling the distance sensor to detect whether a user exists in a third distance interval; controlling the display to adopt standard luminance value control light when there is a user in the third distance interval; and controlling to reduce the display luminance of the display when there is no user in the third distance interval; wherein the first distance interval, the second distance interval and the third distance interval are sequentially away from the display, and the display luminance of the eye protection control light, the distance value control light and the standard luminance value control light is sequentially increased.

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