WO2022001853A1 - Dispositif d'affichage et procédé de correction d'écran - Google Patents

Dispositif d'affichage et procédé de correction d'écran Download PDF

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Publication number
WO2022001853A1
WO2022001853A1 PCT/CN2021/102288 CN2021102288W WO2022001853A1 WO 2022001853 A1 WO2022001853 A1 WO 2022001853A1 CN 2021102288 W CN2021102288 W CN 2021102288W WO 2022001853 A1 WO2022001853 A1 WO 2022001853A1
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WIPO (PCT)
Prior art keywords
screen
height
movement speed
speed increment
adjusting
Prior art date
Application number
PCT/CN2021/102288
Other languages
English (en)
Chinese (zh)
Inventor
吴汉勇
贾亚洲
丁国耀
司洪龙
刘清友
甄凌云
王之奎
李晓平
陈许
王秉清
马会会
张安祺
于硕
刘晋
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.)
Filing date
Publication date
Priority claimed from CN202110297021.4A external-priority patent/CN113938727B/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
Priority to CN202180046281.2A priority Critical patent/CN116391155A/zh
Publication of WO2022001853A1 publication Critical patent/WO2022001853A1/fr

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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/54—Accessories
    • G03B21/56—Projection screens
    • G03B21/58—Projection screens collapsible, e.g. foldable; of variable area
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/422—Input-only peripherals, i.e. input devices connected to specially adapted client devices, e.g. global positioning system [GPS]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/431—Generation of visual interfaces for content selection or interaction; Content or additional data rendering
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]

Definitions

  • the present application relates to the technical field of display devices, and in particular, to a display device and a screen calibration method.
  • Laser TV is a TV product that uses a laser light source as a display light source and cooperates with projection display technology to form images. It is equipped with a special projection screen and can receive radio TV programs or Internet TV programs. In addition to the top-down unfolding screen, the laser TV also uses the bottom-up unfolding screen from the TV cabinet. The latter specifically sets the optical machine and the lifting screen in the TV cabinet. When the TV is turned on, the screen is removed from the TV cabinet. The middle slowly rises, and the image of the optical machine will hit the global position behind.
  • Some embodiments of the present application provide a display device, including:
  • the screen which is configured to be rolled up and down;
  • a drive assembly configured to drive the screen to unfold or curl
  • a monitoring component configured to monitor the state of the screen during the unfolding or rolling of the screen, and feed back the state information of the screen to the controller;
  • Controller configured as:
  • the drive assembly When it is determined according to the state information that the screen is in a non-horizontal state, the drive assembly is adjusted so that the drive assembly drives the first side of the screen to move at the adjusted speed and to restore the screen In the horizontal state, the moving speed of the first side and the second side of the screen is the same;
  • the driving assembly is not adjusted.
  • the controller is configured to:
  • the monitoring component includes an image collector
  • the state information is image information of the screen collected by the image collector
  • the first side height and the second side height are calculated from the image information.
  • the monitoring assembly includes an angle monitor, the angle monitor is configured to monitor the rotation angle of the drive assembly, and the state information is determined according to the corresponding relationship between the rotation angle and the movement of the drive assembly information, wherein the movement correspondence is the correspondence between the rotation angle of the drive assembly and the movement distance of the screen.
  • the controller when the screen is being raised and the height of the first side is higher than the height of the second side, the controller is configured to:
  • the movement speed increment is adjusted until the movement speed increment decreases to the movement speed increment supplement value.
  • the controller is configured to: at every preset interval, divide the current value of the movement speed increment by the step-back value to obtain the movement speed increment used in the next preset interval. quantity.
  • the controller is configured to:
  • the driving component Before determining whether the screen is in a horizontal state according to the state information, when the screen has not moved to the reference zero position, the driving component is controlled to drive the screen to move to the reference zero position.
  • Some embodiments of the present application provide a screen correction method, the method is applied to the screen in the process of unfolding or curling, including:
  • the driving component When it is determined that the screen is in a non-horizontal state according to the state information of the screen fed back by the monitoring component, the driving component is adjusted, so that the driving component drives the first side of the screen to move at the adjusted speed, and The moving speed of the first side and the second side of the screen is the same while the screen is restored to a horizontal state, wherein the driving component is configured to drive the screen to unfold or curl;
  • the driving assembly is not adjusted.
  • determining whether the screen is in a horizontal state according to the state information specifically:
  • the moving speed of the first side is adjusted, and the specific steps are:
  • the movement speed increment is adjusted until the movement speed increment decreases to the movement speed increment supplement value.
  • FIG. 1 is a schematic diagram of an operation scenario between a display device and a control apparatus according to one or more embodiments of the present application;
  • FIG. 2 is a block diagram of a hardware configuration of a display device 200 according to one or more embodiments of the present application;
  • FIG. 3 is a block diagram of the hardware configuration of the control device 100 according to one or more embodiments of the present application;
  • FIG. 4 is a schematic diagram of software configuration in a display device 200 according to one or more embodiments of the present application.
  • 5A-5B are schematic structural diagrams of a curling laser device according to one or more embodiments of the present application.
  • 6-8 are schematic diagrams of components of a curling laser device according to one or more embodiments of the present application.
  • FIG. 9 is a schematic diagram of image projection according to one or more embodiments of the present application.
  • 10A-10B are schematic diagrams of software of a curling laser device according to one or more embodiments of the present application.
  • 11-13, 14A-14B, 15, 16A-16C and 17 are schematic diagrams of image cropping according to one or more embodiments of the present application.
  • FIG. 18 is a schematic diagram of a display interface according to one or more embodiments of the present application.
  • 19A-19B are schematic diagrams of projection screens according to one or more embodiments of the present application.
  • 20A-20B are flowcharts of a screen calibration method according to one or more embodiments of the present application.
  • 21 is a schematic diagram of a preset speed curve according to one or more embodiments of the present application.
  • 22 is a schematic diagram of a speed curve provided according to one or more embodiments of the present application.
  • FIG. 23 is a flowchart of exception handling provided according to one or more 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 one or more 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 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 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 one or more embodiments of the present application.
  • the system is divided into four layers. Layer)
  • the Application Framework layer referred to as the "framework layer”
  • the Android runtime (Android runtime)
  • the system library layer referred to as the “system runtime 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.
  • FIGS. 5A-5B are schematic structural diagrams of a curling laser device according to one or more embodiments of the present application
  • FIGS. 6-8 are schematic diagrams of components of a curling laser device according to one or more embodiments of the present application; FIGS. 5A and 5B 6.
  • the rolling screen 275 in this embodiment can be driven by the driving component 276 to complete the rolling or extending action.
  • the drive assembly 276 includes a plurality of sets of lifting assemblies and beams 231, each set of lifting assemblies includes a lifting frame 232, a lifting motor 233 and a reduction gear set 234; the first end of the lifting frame 232 is rotatably connected to the base 21, and the The two ends are rotatably connected to the beam 231 , the reduction gear set 234 is respectively connected to the lift motor 233 and the lift frame 232 , the second side of the curling screen 275 is fixedly connected to the beam 231 ; the lift motor 233 can drive the lift frame through the reduction gear set 234 When the lift frame 232 is lifted, the beam 231 is supported to unwind and roll the screen 275 .
  • the lift motor 233 and the reduction gear set 234 are fixed on the base 21 , and the reduction gear set 234 is fixedly connected to the first end of the lift frame 232 .
  • the gears included in the reduction gear set 234 are rotatably fixed on the base 21 through the gear bracket, or the gears in the reduction gear set 234 except the gears connected with the lift frame 232 and/or the lift motor 233 can be rotatably fixed on the base 21 through the gear bracket. It is rotatably fixed on the base 21 .
  • the curling screen 275 can be in three states: the first is that the curling screen 275 needs to be curled up in a non-playing scene to reduce the occupied space of the display device. At this time, the curling screen 275 is in a rolling state. For details, please refer to FIG. 7 . In the second play scenario, the curling screen 275 needs to be extended, so that the extended screen can carry the media resources projected by the projection component 278 . For details, please refer to Figure 8.
  • the third is a transition state (not shown) in which the curling screen 275 is in a state of transition between the rolled state and the expanded state during the upward or downward movement of the curling screen 275 .
  • the roll-up screen 275 can carry the media assets projected by the projection component 278, presenting the media assets to the user.
  • the curling screen 275 can also be an OLED screen, which directly displays media resources to the user.
  • the media resource may be an image or a video, wherein the video is displayed as a frame-by-frame image, so in this embodiment, the media resource may be collectively referred to as an image.
  • the curled screen 275 may be a diffuse screen, or a retrograde screen.
  • the drive assembly 276, connected to the curling screen 275, is configured to drive the curling screen 275 to move, including upward movement or downward movement.
  • the driving component 276 can drive the curling screen 275 to rewind or extend based on the control of the controller 250.
  • the drive assembly 276 may be a retractable crawler or a motor in some embodiments.
  • the motor can be set with a motor at the left and right ends of the screen, or a reel lift motor can be set in the middle of the screen, and a motor can be set at the left and right ends of the lift screen. Reel lift motor.
  • the monitoring component 277 includes an image collector, and accordingly, the information monitored by the monitoring component 277 may be image information.
  • the monitoring component 277 includes a camera, and the corresponding monitoring information can be obtained by taking pictures of the screen.
  • the number of cameras 279 may be one or more, wherein, at least one camera has a camera area that is a curled screen area, and the camera is used to take pictures of the screen and display images during the lifting process. When the number of cameras is 2, the two cameras are respectively arranged on two sides of the projection assembly.
  • the camera can be rotated on a horizontal plane, and when it is necessary to take a picture of the screen and display an image, the camera is rotated to the screen orientation; when it is required to take a photo of the user, the camera is rotated to the user.
  • the monitoring assembly 277 includes an angle monitor to monitor the real-time rotational angle of the drive assembly 276 .
  • the monitoring component 277 includes a gravitational acceleration sensor. During the rotation of the driving component 276, by monitoring the information of the gravity sensor in three directions of the space coordinate system (x, y, z), any arbitrary information of the driving component 276 can be obtained. The posture corresponding to the moment. The rotation angle of the driving assembly 276 is calculated according to the attitude.
  • the monitoring component 277 includes an infrared sensor, and the information monitored by the corresponding monitoring component 277 is whether there is a foreign object above the curling screen.
  • the screen curling and unrolling may be that the screen rises from bottom to top or descends from top to bottom, or can be unrolled from left to right or right to left.
  • the present application describes the direction and form of screen curling and unrolling Not limited.
  • the user presses the power-on button of the control device or the power-on button on the display device to power on the projection assembly and the controller.
  • the control slide is opened and the notification screen rises to offset zero.
  • the sliding cover is used to cover the top of the screen in the rolled state when the screen is in the rolled state, so as to prevent dust from falling on the surface of the screen.
  • the screen control system and the start-up display service are run.
  • the screen control system is connected to the monitoring component, and the status parameters of the drive component are obtained through the monitoring component, so as to obtain information such as the height and status of the screen, and the start-up display service is ready to play Preset image.
  • the preset image may be a preset picture, a preset animation or video, or a preset start-up advertisement or the like.
  • the controller will poll and send instructions to the monitoring component, so as to obtain information such as the current status and height of the screen provided by the monitoring component.
  • the controller judges whether the current screen is at a position relative to the zero point according to the height and status information of the screen. If the current screen does not reach the relative zero position, judge whether the difference between the time when the notification screen rises to the relative zero point and the current time exceeds the preset time difference; if the difference between the time when the notification screen rises to the relative zero point and the current time does not exceed the preset time difference If the difference between the time when the notification screen rises to the relative zero point and the current time exceeds the preset time difference, it means that the detection is overtime and an alarm prompt will be issued.
  • FIG. 9 is a schematic diagram of image projection according to one or more embodiments of the present application.
  • the graphic image service collects layers (layers) drawn by different applications, synthesizes a bitmap, and combines the The image is sent to the projection component so that the projection component projects the image onto the screen.
  • the preset speed curve refers to a curve between time and screen height
  • the preset height curve refers to a curve between time and preset image display height.
  • the preset height curve and the preset speed curve can be consistent from the relative zero point to the highest point.
  • controlling the screen to ascend according to the preset speed curve and the power-on display service playing the preset image according to the preset height curve may be performed simultaneously or sequentially.
  • FIGS. 10A-10B are schematic diagrams of software of a curling laser device according to one or more embodiments of the present application.
  • the software architecture includes: a geometric computing service is used to connect a camera to capture images, Real-time processing is performed and the calculation results are fed back to the on-screen control system of the controller.
  • the geometric calculation service also includes data acquisition, data processing, feature calculation, and result distribution.
  • the screen control system is used to control the screen, perform automatic geometric correction, and provide real-time screen rising status information to upper-layer applications.
  • the screen control system also includes: transport layer, protocol layer, business layer, etc.; the application includes startup animation, setting, and shutdown animation, all of which are used to control the playback of the current effective display interface in real time through the screen control system; the graphic image service is responsible for synthesizing and displaying images, The graphic image service also includes: a media player, a graphic image processing module, and the like.
  • the camera collects data and sends it to the geometric computing service; the geometric computing service calculates the curling or unfolding state of the current screen and the display area state of the laser display in real time; In the unfolded state, the speed of the left and right motors is dynamically adjusted to keep the screen horizontal; the laser projection matrix is dynamically adjusted according to the state of the display area displayed by the laser, so as to achieve the effect that the optical-mechanical projection is always forward; applications such as boot animation can read the curl or Expand the status information, dynamically adjust the effective display area in the current business module to match the height of the screen display; the boot animation and other uses are displayed through the graphic image service.
  • the step of obtaining the height of the screen includes: the controller obtains image information of the current screen through an image collector, and measures the height of the screen according to the image information to obtain the height of the current screen. Determine whether the height of the current screen is lower than the display height of the preset image; wherein, the height of the current screen is obtained according to the information fed back by the monitoring component, and the display height of the preset image can be obtained according to the preset height curve and the current time.
  • the current preset image is divided into the first image and the second image according to the height of the screen; for example, the controller may The width of the screen is used to generate a display area; the first coordinate corresponding to the display area is read; the image corresponding to the first coordinate in the preset image is the second image, and the rest of the images are the first image.
  • the first coordinate system is established with the lower left corner of the screen as the origin.
  • the second coordinate system is established with the lower left corner of the preset image as the origin.
  • the coordinate system 1 is the first Coordinate system
  • coordinate system 2 is the second coordinate system.
  • the size of the screen is 1920mm*1080mm
  • the screen can be cut into 1920*1080 display blocks, and the coordinate value of each display block in the first coordinate system is known .
  • the controller calculates that the height of the screen is 678mm at a certain moment, and the first coordinates corresponding to the display area are: (0,0)(0,1)...(0,1920); (1, 0)(1,1)...(1,1920);...(678,0)(678,1)...(678,1920).
  • the image corresponding to the first coordinate in the preset image is the second image, and the rest of the images are the first images.
  • FIG. 12 The image corresponding to the first coordinate in the preset image is the second image, and the rest of the images are the first images.
  • the size of the screen is 1920mm*1080mm.
  • the controller calculates that the height of the screen is 678mm at a certain moment, the image corresponding to the preset image with a height of 678mm from the bottom is the second image, and the rest of the images are the first image.
  • Blackout processing is performed on the first image to obtain a processed image; for example, a floating layer window can be set on the upper layer of the first image, the size of the floating layer window is equal to the size of the first image, and the floating layer window is used to load the black interface,
  • the final processed image can be seen in Figure 14A.
  • the color of each pixel in the first image may be set to black, and the finally obtained processed image may refer to FIG. 14B .
  • the graphic image service divides and masks the preset image, it sends the processed image to the projection component, so that the projection component projects the processed image on the screen.
  • the screen continues to rise according to the preset speed curve and the preset image is projected according to the preset height curve.
  • the processed image projected out can refer to FIG. 15 .
  • the methods provided by some embodiments of the present application are also applicable to the shutdown process.
  • the current preset image is cut into the first image and the second image according to the height of the screen, and the projection component is controlled to project the first image on the current screen.
  • the projection component is controlled to project the first image on the current screen.
  • the screen for example, crop the preset image horizontally at the height of the screen from the top to obtain the first image and the second image.
  • the upper part of the laser projection area can be replaced by a black image or black pixels.
  • the graphic image service combines the black image with the first image after coordinate transformation. into a processed image, and display the processed image on the current screen.
  • the coordinate transformation method subtracts the difference between the highest point of the screen and the current screen height from the ordinate of the first image, and the abscissa remains unchanged.
  • the size of the screen is 1920mm*1080mm
  • the screen can be cut into 1920*1080 display blocks, and the coordinate value of each display block in the first coordinate system is known.
  • the controller calculates that the height of the screen is 678mm at a certain moment, and the preset image is horizontally cropped at a height of 678mm from the top to obtain the first image and the second image. As shown in Fig.
  • the coordinates of the current first image are (1080,0)(1080,1)...(1080,1920);(1079,0)(1079,1)...(1079,1920);... ...(402,0)(402,1)...(402,1920); the difference between the highest point of the screen and the current screen height is 402.
  • the ordinate of the first image is subtracted by 402 to obtain the first image.
  • the coordinates of the image are (402,0)(402,1)...(402,1920);(401,0)(401,1)...(401,1920);...(0,0)(0, 1)...(0,1920), as shown in Figure 16B.
  • the upper part of the laser projection area can be replaced by an all-black image or all-black pixels, and the graphic image service merges the all-black image and the coordinate-transformed first image into a processed image, as shown in FIG. 16C .
  • the graphic image service After the graphic image service performs cropping, coordinate conversion, and blackout processing on the preset image, it sends the processed image to the projection component, so that the projection component projects the processed image on the screen.
  • the projected image can be referred to FIG. 17 .
  • the methods provided by some embodiments of the present application are also applicable to the shutdown process.
  • the preset image is cropped to be the same height as the current screen, and when the projection component projects the image, only the current screen area is projected. This method only has laser projection on the screen and no projection outside the screen, which is more in line with the design constraints and will not leak light to the outside of the screen.
  • the user presses the power-on button of the control device or the power-on button on the display device to power on the projection assembly and the controller, the controller notifies the screen to rise, the system blocks sound and keys, and the projection assembly does not project images,
  • the boot animation program cyclically detects the current screen rising status by reading GPIO, etc. After the screen rises to the highest point, the boot animation program notifies the projection component to project the image, and releases the button shielding and sound shielding to enter the main system.
  • the user powers up the projection assembly and the controller by pressing the power button of the control device or pressing the power button on the display device. The controller notifies that the screen goes up and, at the same time, blocks keystrokes and sounds.
  • the projection assembly does not project an image, but the image is still playing in the background.
  • the purpose of shielding the buttons and sounds is to prevent the sound attached to the image from being played or the user accidentally pressing the button on the control device to trigger the corresponding function, so as to make the user mistakenly think that there is an error in the operation of the display device, delay the boot process, and cause a bad user experience.
  • the projection component is controlled to project a preset image and release the key and sound shielding; wherein, the preset height can be half of the total height of the screen.
  • FIG. 18 is a schematic diagram of a display interface according to one or more embodiments of the present application.
  • the screen When it is detected that the screen has risen to the preset height, the screen will display a prompt message, prompting "the screen is starting, press any key to turn on the screen” and release the key shield. At this time, only the font is colored, and other areas are black, such as shown in Figure 18. If it is detected that the user manually triggers the button after the prompt information is displayed, the screen brightening action is triggered, and the projection component is controlled to project a preset image and cancel the sound shielding.
  • the preset image rises according to the preset speed curve; the height of the screen is obtained in real time, if the height of the screen is lower than the display height of the preset image, the preset image is processed according to the height of the screen, so that the display height of the preset image is the same as that of the screen. Match the rising height; if it is not detected that the user manually triggers the button after the prompt message is displayed, and after the screen rises to the highest point, control the projection component to project the preset image and release the sound shielding.
  • 19A-19B are schematic diagrams of projection screens according to one or more embodiments of the present application; as shown in FIG. 19 , when the height of the first side of the screen and the height of the second side of the screen are inconsistent during the rising process of the screen, the screen is in a non-horizontal state .
  • the step of judging whether the screen is horizontal by using the image information of the screen collected by the image collector is: according to the collected screen image information and the reference position information of the image collector, calculate The height of the first side and the height of the second side of the screen, namely the height of the first side and the height of the second side. If the absolute value of the height difference between the height of the first side and the height of the second side is less than or equal to the difference threshold, it is determined that the screen is in a horizontal state. If the absolute value of the height difference between the height of the first side and the height of the second side is greater than the difference threshold, it is determined that the screen is in a non-horizontal state.
  • the difference threshold may be empirical data pre-stored in the controller.
  • the display device includes two groups of driving assemblies, and the rotation angle information of the two groups of driving assemblies is respectively monitored by the angle monitors.
  • the heights on both sides are calculated separately from the rotation angle information.
  • the display device includes two groups of driving components, and the two groups of driving components respectively drive two sides of the screen to move. According to the rotation angle information of the two groups of driving components monitored respectively, the heights of the two sides are calculated respectively.
  • the controller is configured to perform: during the movement of the screen, when it is determined that the screen is in a non-horizontal state according to the state information of the screen monitored by the monitoring component, adjust the driving component so that the driving component drives The first side of the screen moves at the adjusted speed, and the moving speeds of the first side and the second side of the screen are the same while the screen is restored to a horizontal state.
  • the driving component is not adjusted, that is, the screen is driven to move at the original speed.
  • the movement speed of the uppermost side of the screen may be adjusted based on the lowermost side of the screen. That is, if the height of the first side is higher than the height of the second side, adjusting the moving speed of the first side actually reduces the moving speed of the first side while maintaining the moving speed of the second side unchanged.
  • the movement speed of the lowermost side of the screen may be adjusted based on the uppermost side of the screen. That is, if the height of the first side is lower than the height of the first side, adjusting the moving speed of the first side actually increases the moving speed of the first side while maintaining the moving speed of the second side unchanged.
  • the drive components can also be in one group or in multiple groups. Some embodiments of the present application take two groups of drive assemblies as examples to describe the specific process of adjusting the speed.
  • the two sets of driving assemblies in some embodiments of the present application are respectively used to drive the first side movement and the second side movement of the screen.
  • the controller directly controls the rotation of the drive assembly, that is, controls the angular velocity of the motor.
  • the motor converts its angular velocity to the linear velocity of the screen.
  • the thickness of the screen used for the screen is relatively small, and the amount of change in the radius of the rotating shaft in the process of rising or falling of the screen is ignored.
  • the screen is in the rising process and the height of the first side is lower than the height of the second side, it means that the moving speed of the first side is slower than that of the second side. Then, adjusting the moving speed of the first side based on the second side is actually increasing the moving speed of the first side.
  • the specific process of adjusting the moving speed of the first side is as follows: according to the height difference Z between the height of the first side of the screen and the height of the second side of the screen, and the preset adjustment time T (it is expected to complete the adjustment within the preset adjustment time), determine the screen first.
  • the calculation formula of the incremental replenishment amount dd ⁇ of moving speed is: [TH2/t-H/t]-[TH1/t-H/t].
  • TH2 and TH1 are the height of the first side and the height of the second side of the screen, respectively.
  • t is the current rising time
  • H is the theoretical height of the current screen rising
  • the calculation formula is:
  • r1 is the inner diameter of the reel
  • h is the thickness of the screen
  • x is the current number of turns
  • r2 is the maximum radius of the reel when the screen is not unfolded.
  • the specific process of adjusting the movement speed increment by using the backstepping algorithm is as follows: at every preset interval, the value of the current movement speed increment is divided by a backstep value, for example, the value of the current movement speed increment can be divided by two. Use the obtained movement speed increment as the movement speed increment used in the next preset interval.
  • the incremental adjustment value of the movement speed is issued every 500ms, that is, a step backward every 500ms.
  • the regression algorithm of dv2, dv2/2, dv2/4...dd ⁇ adjust the screen movement speed in increments of the backward movement speed.
  • the monitoring component monitors whether the state of the screen is level in real time.
  • the incremental supplementary value dd ⁇ of the movement speed is directly issued to the movement speed of the first side of the screen. If it is detected that the screen is not in a horizontal state, the movement speed increment will continue to be issued to the movement speed of the first side of the screen in the form of a regression algorithm, until the movement speed increment is degraded to the movement speed increment supplementary value dd ⁇ .
  • a non-regressive algorithm can also be used to adjust the movement speed increment. The specific process is: always adjust the movement speed of the first side by the movement speed increment, and when the adjustment time reaches the preset adjustment time, the movement speed The increment is directly reduced to the movement speed increment supplementary value dd ⁇ .
  • the screen is in the rising process and the height of the first side is higher than the height of the second side, it means that the moving speed of the first side is faster than that of the second side. Then, adjusting the moving speed of the first side based on the second side is actually reducing the moving speed of the first side.
  • the specific process of adjusting the movement speed of the first side is: while reducing the movement speed of the first side by the movement speed increment (the movement speed increment is a negative value at this time), use the backward algorithm to adjust the movement speed increment until the movement speed increases. The amount drops to the movement speed incremental replenishment value.
  • the calculation method of the movement speed increment and the movement speed increment supplementary value refers to the above-mentioned embodiment.
  • the screen if the screen is in the process of descending and the height of the first side is lower than the height of the second side, it means that the moving speed of the first side is faster than that of the second side. Then, adjusting the moving speed of the first side based on the second side actually reduces the moving speed of the first side while maintaining the moving speed of the second side unchanged.
  • the screen if the screen is in the process of descending and the height of the first side is higher than the height of the second side, it means that the moving speed of the first side is slower than that of the second side.
  • adjusting the moving speed of the first side based on the second side actually increases the moving speed of the first side while maintaining the moving speed of the second side unchanged.
  • adjusting the moving speed of the first side reference may be made to the foregoing embodiment, which will not be repeated in this embodiment.
  • the controller is further configured to execute: after the screen is moved to the top, when it is determined that the screen is in a non-horizontal state according to the state information of the screen monitored by the monitoring component, control the driving component to drive the screen.
  • the lowest side continues to rise, while the highest side that does not drive the screen continues to rise until the screen returns to a horizontal state. Determining whether the screen is in a horizontal state has been described in detail above, and will not be repeated here. Based on the above embodiment, if the screen is raised to the top, the screen is in a non-horizontal state.
  • the movement time is calculated (the movement process of the lowest side is still at a constant speed during this process), that is, the absolute value of the height difference for the lowest side to move at the current moving speed is required. time spent.
  • the driving component drives the lowest side to continue to rise at the current moving speed until the time when the screen returns to the horizontal state, that is, the time when the lowest side continues to rise reaches the moving time, and the screen returns to the horizontal state.
  • the screen if the screen is raised to the top, the screen is not horizontal. Then, the driving component on the lowest side is controlled to drive the lowest side to continue to rise, and at the same time, the driving component on the highest side is turned off, that is, the highest side is not driven to continue to rise. In the process of driving the lowermost side to continue to rise, continue to receive the status information of the screen fed back by the monitoring component, and continue to determine whether the screen returns to a horizontal state according to the status information. If it is determined that the screen is still in a non-horizontal state, continue to control the driving component of the lowest side to drive the lowest side to continue to rise. Until it is determined that the screen returns to the horizontal state according to the feedback status information.
  • FIGS. 20A-20B are flowcharts of a screen correction method according to one or more embodiments of the present application; with reference to FIG. 20A , the method includes the following steps: During the curling process (only the constant speed stage is involved), the monitoring component monitors the status of the screen and feeds back the status information of the screen to the controller. The controller determines whether the screen is in a horizontal state according to the state information of the screen. If the screen is in a non-horizontal state, the controller adjusts the drive assembly so that the drive assembly drives the first side of the screen to move at the adjusted speed, and the screen returns to a horizontal state while the screen is restored The first side and the second side move at the same speed. If the screen is horizontal, the drive assembly is not adjusted, that is, the two sides of the screen move at the original speed. Meanwhile, the monitoring component continues to monitor the status of the screen, and periodically sends the status information of the screen to the controller.
  • An embodiment of the present application provides another method for calibrating a screen of a display device.
  • the method includes the following steps: the screen is in the process of unwinding or curling (only the constant speed stage is involved), the monitoring component monitors the state of the screen, and sends a message to the screen.
  • the controller feeds back the status information of the screen.
  • the controller calculates the height of the first side and the height of the second side of the screen according to the state information of the screen, and simultaneously calculates the absolute value of the height difference between the first side and the second side.
  • the controller also pre-stores the difference threshold of the height difference.
  • the driving assembly does not need to be adjusted. If the absolute value of the height difference between the first side and the second side is greater than the difference threshold, it is determined that the screen is in a non-horizontal state, and the drive assembly needs to be adjusted to adjust the moving speed of the first side of the screen based on the second side of the screen, that is, not to Adjust the moving speed of the second side, and adjust the moving speed of the first side, so that the heights of the first side and the second side are consistent (the absolute value of the height difference is less than or equal to the difference threshold), and the moving speed of the first side and the second side is at the same time.
  • the curling screen is controlled to ascend according to a preset speed curve, wherein the preset speed curve refers to a curve between time and curling screen height, and the preset height curve refers to a curve between time and preset image display height.
  • the curve of time vs. curl screen height and the curve of time vs. preset image display height can be the same or different.
  • FIG. 21 is a schematic diagram of a preset speed curve according to one or more embodiments of the present application. The preset speed curve adopts the default ascending curve parameters of the display device when it leaves the factory, as shown in Route 1 in FIG. 21 .
  • Hmax is the total height of the screen rising this time
  • t is the current time
  • Tmax is the total time that the screen is rising this time.
  • the actual height and ascent time of each ascent will be used as the basis, and stored in the historical database as a reference for the next startup.
  • the specific implementation method is as follows: 1. In the interface design, design an interface for adding the screen to rise according to the parameters (pass the current rising height and the total time to the screen as parameters). 2. Each time the machine is powered on, the parameters of the current boot (for example, the ascent time, according to the real-time altitude, the total duration through the curve formula, inversely deduce the speed, acceleration and other information of the current ascent). 3. Due to aging, temperature and humidity are gradually affected, so nearly 10 times of startup can be taken as the basis for calculating the initial speed, height and acceleration of this startup. 4.
  • the user interface shows that the system fits a new rising curve according to the calculated parameters.
  • the control screen display image rises.
  • the serial port command is sent to the monitoring component, and it rises synchronously. 5.
  • the parameters of this startup will be included in the rising curve database again for the next startup.
  • the height of the curling screen specifically refers to the distance between the highest point of the curling screen and the bottom (absolute zero point) of the curling screen.
  • the method for calculating the height of the curling screen includes: the controller obtains the number of rotations of the driving component through the monitoring component; the screen display calculation service run by the controller calculates the current height of the curling screen according to the number of rotations of the driving component.
  • FIG. 22 is a schematic diagram of a speed curve provided according to one or more embodiments of the present application. During this process, a graph of time versus curling screen height is shown in Figure 22.
  • the reset state refers to re-entering the normal boot process after the curling screen is lowered to the absolute zero point.
  • FIG. 23 is a flowchart of exception handling provided in accordance with one or more embodiments of the present application.
  • the screen control system polls and sends an instruction to the monitoring component to obtain the current state, height and abnormal information of the curling screen, it controls the graphic image service to stop sending images to the projection component; controls the curling screen to enter reset (reset) ) state, when the curling screen drops to the absolute zero point and then rises to the relative zero point, the screen control system sends a screen-raising command to control the curling screen to rise according to the preset speed curve, and at the same time, notify the graphic image service to send the image to the preset curve according to the preset curve.
  • the projection assembly projects onto the curled screen.
  • the screen control system still needs to poll and send an instruction to the monitoring component to obtain information such as the current state and height of the curling screen.
  • the rising height of the curling screen and the display height of the image are kept in sync.
  • the monitoring component feeds back the state to the screen control system, and the curling screen is lifted up.
  • the step of keeping the rising height of the curling screen and the display height of the image in a synchronized state specifically includes: acquiring the current height of the curling screen in real time, and comparing the current height of the curling screen with the display height of the image. If the height of the current curling screen is lower than the display height of the image, the image will be cropped to the same size as the height of the curling screen, and the area of the non-curling screen will be blacked out; if the height of the current curling screen is not lower than the display height of the image, continue to follow the The preset curve rises to curl the screen and display the image.
  • the projection assembly is controlled to project a user interface on the curling screen, and the user interface includes abnormal information prompt information.
  • the abnormal information prompt information includes abnormal information prompt text and abnormal information prompt box.
  • the abnormal information prompt box has a certain height, which can be set as a preset height.
  • the steps of controlling the projection component to project the user interface include: determining the effective display area and the non-effective display area of the user interface according to the current height of the curling screen; masking the non-effective display area; judging whether the current curling screen height exceeds a preset height; When the height of the curling screen does not exceed the preset height, set the abnormal information prompt text at the preset position of the effective display area to obtain the processed user interface; if the current curling screen height exceeds the preset height, set the abnormal information prompt box in The preset position of the effective display area is obtained, and the processed user interface is obtained; the projection component is controlled to project the processed user interface onto the curling screen.

Abstract

Un dispositif d'affichage et un procédé de correction d'écran sont divulgués. Le procédé comprend : l'utilisation d'un ensemble de surveillance pour surveiller l'état d'un écran en temps réel, et la détermination, en fonction d'informations d'état de l'écran, quant à savoir si l'écran est dans un état horizontal. S'il est déterminé que l'écran est dans un état horizontal, un ensemble d'entraînement n'est pas réglé, et par conséquent, l'état de déplacement de l'écran n'a pas besoin d'être réglé. S'il est déterminé que l'écran n'est pas dans un état horizontal, l'ensemble d'entraînement est réglé, de telle sorte qu'un premier côté de l'écran se déplace à la vitesse réglée. Enfin, la vitesse de déplacement du premier côté et d'un second côté de l'écran est cohérente tandis que l'écran est activé pour être restauré à l'état horizontal.
PCT/CN2021/102288 2020-06-29 2021-06-25 Dispositif d'affichage et procédé de correction d'écran WO2022001853A1 (fr)

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CN202110297021.4A CN113938727B (zh) 2020-06-29 2021-03-19 一种显示设备
CN202110296908.1 2021-03-19
CN202110298485.7A CN113938729A (zh) 2020-06-29 2021-03-19 显示设备的屏幕校正方法和显示设备
CN202110298436.3A CN114125518B (zh) 2020-06-29 2021-03-19 一种显示设备
CN202110296908.1A CN113938726B (zh) 2020-06-29 2021-03-19 一种显示设备
CN202110296907.7A CN113938725B (zh) 2020-06-29 2021-03-19 显示设备的屏幕校正方法和显示设备
CN202110298485.7 2021-03-19
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