CN117136332A

CN117136332A - Control method and main control device of laser television and laser television

Info

Publication number: CN117136332A
Application number: CN202280027528.0A
Authority: CN
Inventors: 陈许; 吴凯
Original assignee: Qingdao Hisense Laser Display Co Ltd
Current assignee: Qingdao Hisense Laser Display Co Ltd
Priority date: 2021-04-25
Filing date: 2022-03-24
Publication date: 2023-11-28
Also published as: WO2022227964A1; CN113259641A

Abstract

A control method of a laser television, a main control device and the laser television. The method comprises the following steps: receiving a control instruction for instructing to expand or retract the screen to a target position (101); according to the control instruction, a corresponding instruction is sent to a screen control unit of the screen so as to control the screen to be unfolded or retracted to a target position (102); during the expansion or retraction of the screen, position information of the expanded screen is acquired in real time from the screen control unit and transmitted to the projection display unit of the projection device, so that the position of the projection area is adjusted in real time by the projection display unit to be consistent with the position of the expanded screen (103).

Description

Control method and main control device of laser television and laser television

Cross Reference to Related Applications

The application claims priority to China patent office, application No. 202110448633.9, control method of laser television, master control device and Chinese patent application of laser television filed in 2021, 4 and 25, the entire contents of which are incorporated herein by reference.

Technical Field

The present application relates to control technologies, and in particular, to a control method and a master control device for a laser television, and a laser television.

Background

The television technology is subjected to three technical iterations of black-and-white television, color television and digital television represented by liquid crystal television, PDP, OLED and the like, and the fourth generation television display technology of laser projection equipment collocation and screen, namely the laser television technology, appears at present.

Currently, a laser television mainly comprises a laser projection device and a screen, and because of the large screen size, a rollable screen is currently appeared to reduce the product size. For such laser televisions, how to realize effective control is a current problem to be solved.

Disclosure of Invention

In one aspect, the present application provides a method for controlling a laser television, the laser television including a projection device and a rollable screen; the control method comprises the following steps: receiving a control instruction, wherein the control instruction is used for indicating to expand or retract the screen to a target position; according to the control instruction, a corresponding instruction is sent to a screen control unit of the screen so as to control the screen to be unfolded or retracted to a target position; and in the process of expanding or retracting the screen, acquiring the position information of the expanded screen from the screen control unit in real time, and sending the position information to a projection display unit of the projection equipment so that the position of the projection area adjusted by the projection display unit in real time is consistent with the position of the expanded screen.

In another aspect, the present application provides a master control apparatus, where the master control apparatus is disposed in a control system of a laser television, and the control system includes the master control apparatus, a projection display unit, and a screen control unit; the master control device includes: the receiving module is used for receiving a control instruction, wherein the control instruction is used for indicating to expand or retract the screen to a target position; the processing module is used for sending a corresponding instruction to a screen control unit of the screen according to the control instruction so as to control the screen to be unfolded or retracted to a target position; the processing module is further configured to acquire, in real time, position information of the expanded screen from the screen control unit during the process of expanding or retracting the screen, and send the position information to a projection display unit of the projection device, so that the position of the projection area is adjusted in real time by the projection display unit to be consistent with the position of the expanded screen.

In still another aspect, the present application provides a master control apparatus, where the master control apparatus is disposed in a control system of a laser television, and the control system includes the master control apparatus, a projection display unit, and a screen control unit; the master control device includes: a memory, a processor; a memory; a memory for storing the processor-executable instructions; wherein the processor is configured to: the method as described above is performed according to the executable instructions.

In yet another aspect, the application provides a computer-readable storage medium having stored therein computer-executable instructions for performing the method as described above when executed by a processor.

In yet another aspect, the application provides a computer program product comprising a computer program which, when executed by a processor, implements a method as described above.

In yet another aspect, the present application provides a laser television comprising: a projection device, a rollable screen, a projection display unit for controlling the projection device, a screen control unit for controlling the rollable screen, and a master device as described above.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.

A schematic diagram of an operation scenario between a laser television and a control device according to an embodiment is exemplarily shown in fig. 1;

a block diagram of a configuration of the control apparatus 100 in accordance with an exemplary embodiment is exemplarily shown in fig. 2;

a schematic hardware architecture of the laser television 200 according to an exemplary embodiment is illustrated in fig. 3a and 3 b;

Fig. 4 is a schematic flow chart illustrating a control method of a laser television according to a first embodiment of the present application;

fig. 5a and 5b are schematic structural diagrams and signaling interaction diagrams of a control system of a laser television;

fig. 6 is a schematic flow chart of a control method of a laser television according to a second embodiment of the present application;

fig. 7 is a schematic flow chart of a control method of a laser television according to a third embodiment of the present application;

fig. 8a is a schematic architecture diagram of a control system of a laser television according to a fourth embodiment of the present application;

FIGS. 8 b-8 d are flowcharts in different scenarios;

fig. 9 is a schematic structural diagram of a master control device according to a fifth embodiment of the present application;

fig. 10 is a schematic structural diagram of a master control device according to a sixth embodiment of the present application.

Specific embodiments of the present application have been shown by way of the above drawings and will be described in more detail below. The drawings and the written description are not intended to limit the scope of the inventive concepts in any way, but rather to illustrate the inventive concepts to those skilled in the art by reference to the specific embodiments.

Detailed Description

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the application. Rather, they are merely examples of apparatus and methods consistent with aspects of the application as detailed in the accompanying claims.

It should be noted that the brief description of the terminology in the present application is for the purpose of facilitating understanding of the embodiments described below only and is not intended to limit the embodiments of the present application. Unless otherwise indicated, these terms should be construed in their ordinary and customary meaning.

The terms first, second and the like in the description and in the claims and in the above-described figures are used for distinguishing between similar or similar objects or entities and not necessarily for describing a particular sequential or chronological order, unless otherwise indicated (Unless otherwise indicated). It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application are, for example, capable of operation in sequences other than those illustrated or otherwise described herein.

Furthermore, the terms "comprise" and "have," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a product or apparatus that comprises a list of elements is not necessarily limited to those elements expressly listed, but may include other elements not expressly listed or inherent to such product or apparatus. The term "module" as used in this disclosure refers to any known or later developed hardware, software, firmware, artificial intelligence, fuzzy logic, or combination of hardware and/or software code that is capable of performing the function associated with that element.

The term "remote control" as used in the various embodiments of the present application refers to a component of an electronic device (such as a display device as disclosed herein) that can typically wirelessly control the electronic device over a relatively short distance. The assembly may be connected to the electronic device generally using infrared and/or Radio Frequency (RF) signals and/or bluetooth, and may also include functional modules such as WiFi, wireless USB, bluetooth, motion sensors, etc. For example: the hand-held touch remote controller replaces most of the physical built-in hardware in a general remote control device with a touch screen user interface.

A schematic diagram of an operation scenario between a laser television and a control device according to an embodiment is exemplarily shown in fig. 1. As shown in fig. 1, a user can operate a laser television 200 by controlling the apparatus 100.

The control device 100 may be a remote controller 100A, which may communicate with the laser tv 200 through infrared protocol communication, bluetooth protocol communication, zigBee protocol communication, or other short-range communication, and is used to control the laser tv 200 through wireless or other wired modes. The user may control the laser television 200 by inputting user instructions through keys, voice input, control panel input, etc. on the remote control 100A. Such as: the user can input corresponding control commands through a screen up and down key, a volume up and down key, a channel control key, up/down/left/right movement keys, a voice input key, a menu key, an on/off key, etc. on the remote controller 100A, thereby realizing the function of controlling the laser television 200.

The control apparatus 100 may also be an intelligent device, such as a mobile terminal 100B, a tablet computer, a notebook computer, etc., which may communicate with the laser television 200 through a local network (LAN, local Area Network), a wide area network (WAN, wide Area Network), a wireless local area network (WLAN, wireless Local Area Network), or other networks, and control the laser television 200 through an application program corresponding to the laser television 200. For example, the laser television 200 is controlled using an application running on a smart device. The application may provide various controls to the User through an intuitive User Interface (UI) on a screen associated with the smart device.

For example, the mobile terminal 100B and the laser television 200 may each be provided with a software application, so that connection communication between the two may be implemented through a network communication protocol, thereby achieving the purpose of one-to-one control operation and data communication. Such as: the mobile terminal 100B and the laser television 200 can be made to establish a control instruction protocol, a remote control keyboard is synchronized to the mobile terminal 100B, and the function of controlling the laser television 200 is realized by controlling a user interface on the mobile terminal 100B; the audio and video content displayed on the mobile terminal 100B may also be transmitted to the laser television 200, so as to realize a synchronous display function.

As shown in fig. 1, the laser television 200 may also be in data communication with the server 300 via a variety of communication means. In various embodiments of the present application, the laser television 200 may be permitted to make a wired or wireless communication connection with the server 300 via a local area network, a wireless local area network, or other network. The server 300 may provide various content and interactions to the laser television 200.

By way of example, the laser television 200 receives software program updates by sending and receiving information, and by interacting with an electronic program guide (EPG, electronic Program Guide), or accessing a remotely stored digital media library. The servers 300 may be one group, may be multiple groups, and may be one or more types of servers. Other web service content such as video on demand and advertising services are provided through the server 300.

The laser television 200 includes a screen 201 and a projection device 202. The projection device 202 obtains the content to be displayed, and projects the content to be displayed to the screen 201 by adopting an optical projection imaging mode, so that the screen 201 displays the content to be displayed. The particular laser television type, size, resolution, etc. are not limited, and those skilled in the art will appreciate that the laser television 200 may be modified in performance and configuration as desired.

The laser tv 200 may additionally provide an intelligent network tv function of a computer support function in addition to a broadcast receiving tv function. Examples include web tv, smart tv, internet Protocol Tv (IPTV), etc. In some embodiments, the laser television may not have broadcast receiving television functionality.

In other examples, more functions may be added or the above functions may be reduced. The function of the laser television is not particularly limited in the present application.

A block diagram of the configuration of the control apparatus 100 according to the exemplary embodiment is exemplarily shown in fig. 2. As shown in fig. 2, the control device 100 includes a controller 110, a communicator 130, a user input/output interface 140, a memory 190, and a power supply 180.

The control device 100 is configured to control the laser television 200, receive an input operation instruction from a user, and convert the operation instruction into an instruction that the laser television 200 can recognize and respond to, so as to perform an interaction between the user and the laser television 200. Such as: the user responds to the channel addition and subtraction operation by operating the channel addition and subtraction key on the control apparatus 100. And the following steps: the user operates a screen up-down key on the control device 100, and the laser television 200 moves up or down in response to the control screen. In the present application, "up" or "down" is relative to the installation position of the screen, and it is understood that the direction in which the "up" or "down" is located is different depending on the installation position of the screen. For example, for a ceiling-mounted screen, "up" and "down" refer to a change in the height direction of the screen, while for a vertical side wall-mounted screen, the directions of "up" and "down" are changes in the horizontal direction.

In some embodiments, the control apparatus 100 may be a smart device. Such as: the control device 100 may install various applications for controlling the laser television 200 according to the user's needs.

In some embodiments, as shown in fig. 1, the mobile terminal 100 or other intelligent electronic device may function similarly to the control apparatus 100 after installing an application for manipulating the laser television 200. Such as: the user may implement the functions of the physical keys of the control apparatus 100 by installing an application, various function keys or virtual buttons of a graphical user interface available on the mobile terminal 100B or other intelligent electronic device.

The controller 110 includes a processor 112, RAM 113 and ROM 114, a communication interface, and a communication bus. The controller 110 is used to control the operation and operation of the control device 100, as well as the communication collaboration among the internal components and the external and internal data processing functions.

The communicator 130 performs communication of control signals and data signals with the laser television 200 under the control of the controller 110. Such as: the received user input signal is transmitted to the laser television 200. The communicator 130 may include at least one of a WIFI module 131, a bluetooth module 132, an NFC module 133, and the like.

A user input/output interface 140, wherein the input interface includes at least one of a microphone 141, a touch pad 142, a sensor 143, keys 144, a camera 145, etc. Such as: the user can realize the user instruction input function through actions such as voice, touch, gesture, pressing and the like, and the input interface converts the received analog signals into digital signals and converts the digital signals into corresponding instruction signals to be sent to the laser television 200.

The output interface includes an interface that transmits the received user instruction to the laser television 200. In some embodiments, an infrared interface may be used, as well as a radio frequency interface. Such as: when the infrared signal interface is used, the user input instruction needs to be converted into an infrared control signal according to an infrared control protocol, and the infrared control signal is transmitted to the laser television 200 through the infrared transmitting module. And the following steps: when the radio frequency signal interface is used, the user input instruction is converted into a digital signal, and then the digital signal is modulated according to a radio frequency control signal modulation protocol and then transmitted to the laser television 200 through the radio frequency transmission terminal.

In some embodiments, the control device 100 includes at least one of a communicator 130 and an output interface. The control device 100 is provided with a communicator 130 such as: the modules such as WIFI, bluetooth, NFC, etc. can send the user input instruction to the laser television 200 through the WIFI protocol, or the bluetooth protocol, or the NFC protocol code.

A memory 190 for storing various operation programs, data and applications for driving and controlling the control device 100 under the control of the controller 110. The memory 190 may store various control signal instructions input by a user.

The power supply 180 is configured to provide operation power support for each electrical component of the control device 100 under the control of the controller 110. The power supply 180 may use a battery and associated control circuitry to provide power.

A schematic hardware architecture of the laser television 200 according to an exemplary embodiment is illustrated in fig. 3 a. For ease of illustration, the laser television 200 of fig. 3a is illustrated with a projection device and screen separation arrangement.

As shown in fig. 3a, the laser television in the laser television 200 includes: a projection device 1 and a rollable screen 2. The projection device 1 is used for acquiring content to be displayed, specifically, the projection device can separate a video signal of the content to be displayed into image signals of three primary colors of RGB, then respectively control an RGB three primary color semiconductor laser generator through processing, emit laser with corresponding intensity, and scan a light beam through a projection lens to a screen to form an image after modulation output and signal synchronization control. The screen 2 is used to present a picture to the user.

In addition, the laser tv 200 further includes a sound reproduction device (not shown) such as an audio component, for example, an I2S interface including a power Amplifier (AMP) and a Speaker (Speaker), etc., for realizing reproduction of sound. Typically, the audio assembly is capable of at least two channels of sound output; when the panoramic surround effect is to be achieved, a plurality of acoustic components need to be provided to output sounds of a plurality of channels, and a detailed description thereof will not be given here.

In the present application, in addition to the way in which the projection device and the screen are separately provided, in order to reduce the occupied space, in another arrangement, the projection device 1 and the rollable screen 2 are integrated. As an example, as shown in fig. 3b, the laser television 200 of this solution integrates the projection device and the rollable screen in a case 3, and a sliding cover 4 and a flip cover 5 are provided on the case 3 for shielding the projection device 1 and the screen 2, respectively, when the laser television 200 is not in operation. When the laser television 200 is in a working state, the sliding cover 4 and the flip cover 5 are opened, the screen 2 is unfolded or retracted under the action of the screen transmission mechanism, and the display effect in the switching-on and switching-off process of the laser television is shown in the figure. Correspondingly, the laser television of the scheme also comprises a projection display unit for controlling the projection equipment, a screen control unit for controlling the lifting of a screen, a sliding cover transmission mechanism for controlling the opening or closing of a sliding cover, a screen transmission mechanism for realizing the lifting of the screen, a flip transmission mechanism for controlling the opening or closing of a flip and other modules.

Fig. 4 is a schematic flow chart illustrating a control method of a laser television according to a first embodiment of the present application, where an execution body of the embodiment may be a master control device, and the scheme of the embodiment is used to implement effective control of the laser television, as shown in fig. 4, and the method includes:

101. receiving a control instruction, wherein the control instruction is used for indicating to expand or retract the screen to a target position;

102. according to the control instruction, a corresponding instruction is sent to a screen control unit of the screen so as to control the screen to be unfolded or retracted to a target position; the method comprises the steps of,

103. and in the process of expanding or retracting the screen, acquiring the position information of the expanded screen from the screen control unit in real time, and sending the position information to a projection display unit of the projection equipment so that the position of the projection area adjusted by the projection display unit in real time is consistent with the position of the expanded screen.

Wherein the control instruction is an instruction capable of triggering the screen to be unfolded or retracted, and the control instruction comprises but is not limited to: a power on command (which may trigger a screen expansion), a power off command (which may trigger a screen retraction), and a screen up/down command. In practical applications, the user may send a control instruction to the main control device through the aforementioned control device, or may trigger the control instruction through a hardware structure (e.g., a key) disposed on the laser television.

In practical application, the control method can be implemented by a computer program, for example, application software and the like; alternatively, the control method may be implemented as a medium storing a related computer program, for example, a usb disk, a cloud disk, or the like; still alternatively, the control method may be implemented by a physical device, e.g., a chip or the like, in which the relevant computer program is integrated or installed.

And the main control device in 102 sends corresponding instructions to the screen control unit according to different control instructions so as to control the screen to reach the corresponding target positions. For example, the control instruction includes a power-on instruction, and a corresponding instruction is sent to the screen control unit to instruct the screen to be unfolded to a vertex position (the target position in the scene is the vertex position). The vertex position here may be preset, for example, a position that is normally set when the user views the television, or a position where the maximum size of the screen support extension is located, or a position that is set by default, which is not limited thereto. For another example, the control command includes a shutdown command, and a corresponding command is sent to the screen control unit to instruct the screen to retract to the starting position. The initial position may be the position of the screen before the power-on or in the power-off state. Further, for example, the control instruction may be an instruction specially used for adjusting the position of the screen, for example, the user may specify the height of the screen, and correspondingly send the height of the user instruction to the screen control unit, so as to instruct the screen to be unfolded or retracted to the position specified by the user, or the user may adjust the screen to be lifted or lowered as required until reaching the satisfactory height, and then stop adjusting, and correspondingly send a lifting instruction or a lowering instruction to the screen control unit, so as to instruct the screen control unit to unfold or retract until receiving the stop instruction, and accordingly instruct the screen control unit to stop lifting or lowering the screen.

Wherein the position of the projection area coincides with the position of the unfolded screen means that the projection area coincides with the area of the unfolded screen, for example, the edge of the projection area coincides with the edge of the unfolded screen. In one implementation, the process of expanding or retracting the screen may synchronize the playing of the display content, for example, playing video requested by the user, or a preset animation. A specific display effect can be seen in fig. 3a and 3 b. The application synchronizes the position of the unfolded screen to the projection display unit in real time in the process of lifting the screen, so that the area of the display picture is consistent with the area of the screen all the time, the playing effect of laser display is improved, the problem of inconvenience in watching caused by the change of the position of the screen is avoided, and the scheme of synchronizing the position information in real time can also avoid the problem that the display picture cannot synchronously follow the movement of the screen due to the abnormality of the projection equipment or one side of the screen.

For better understanding of the present solution, as shown in fig. 5a by way of example, fig. 5a is a schematic structural diagram of a control system of a laser television, where the control system includes a main control device 51, a projection display unit 52, and a screen control unit 53. Fig. 5b is a signaling interaction diagram corresponding to the control method provided in the first embodiment, as shown in fig. 5b, the main control device receives a control instruction, and sends a corresponding instruction to the screen control unit according to the control instruction, so as to control the screen to be unfolded or retracted to the target position. In the process of expanding or retracting the screen, the main control device acquires the position information of the expanded screen from the screen control unit in real time and sends the position information to the projection display unit, so that the position of the projection area is adjusted by the projection display unit in real time to be consistent with the position of the expanded screen.

In addition, the laser television further includes a foreign matter detection unit for safety. In one embodiment, before 102, the method may further include:

a first detection instruction is sent to a foreign matter detection unit, and the first detection instruction is used for indicating the foreign matter detection unit to detect whether an obstacle exists in the expanding or retracting direction of the screen or not and returning a detection result;

and sending a corresponding instruction to a screen control unit of the screen according to the control instruction so as to control the screen to be unfolded or retracted to a target position, wherein the method comprises the following steps of:

and according to the detection result of the foreign matter detection unit, if no obstacle exists, sending a corresponding instruction to a screen control unit of the screen so as to control the screen to be unfolded or retracted to a target position.

Specifically, after receiving the control instruction, the main control device instructs the foreign matter detection unit to detect whether an obstacle is blocked in the moving direction of the screen, and if not, the subsequent processing is executed. According to the embodiment, the screen equipment can be protected from being damaged in the screen lifting process, and the safety is improved. In one implementation, if an obstacle is detected, the process may be paused and prompted, such as, but not limited to: picture cues (such as display "obstacle present, please move around" on the screen), voice cues (such as output "obstacle present, please move around"), etc.

In the control method of the laser television provided by the embodiment, the main control device sends an instruction to the screen control unit of the screen to control the expansion or retraction of the screen, and in the process of expanding or retracting the screen, the position information of the expanded screen is acquired from the screen control unit in real time and is sent to the projection display unit of the projection device, and the projection display unit adjusts the position of the projection area in real time based on the position information, so that the position of the projection area is consistent with that of the expanded screen in the process of expanding or retracting the screen. According to the scheme, the projection area and the position of the unfolded screen are kept consistent in the process of unfolding or retracting the screen, so that the effective control of the laser television is realized through synchronous linkage of the projection area and the position of the screen. In addition, the expanded screen position in the scheme is acquired and transmitted in real time, so that linkage failure caused by single-side equipment change can be effectively avoided, and the stability of laser television control is improved.

Fig. 6 is a schematic flow chart illustrating a control method of a laser television according to a second embodiment of the present application, where the scene in the embodiment relates to a startup scene, and as shown in fig. 6, on the basis of any embodiment, the control instruction includes a startup instruction; 102 specifically includes:

601. According to the starting-up instruction, a first starting-up control instruction is sent to the screen control unit, and the first starting-up control instruction is used for instructing the screen control unit to control the screen to be unfolded from a starting position to a zero position and returning a first starting-up preparation message;

602. according to the starting-up instruction, a second starting-up control instruction is sent to the projection display unit, and the second starting-up control instruction is used for indicating the projection display unit to finish display initialization and returning a second starting-up preparation message;

603. after receiving the first startup preparation message and the second startup preparation message, sending an unfolding instruction to the screen control unit, wherein the unfolding instruction is used for instructing the screen control unit to control the screen to be unfolded to a vertex position;

correspondingly, 103 specifically includes:

604. and in the process of expanding the screen from the zero point position to the vertex position, acquiring the position information of the expanded screen from the screen control unit in real time, and sending the position information to a projection display unit of the projection equipment so that the position of the projection area adjusted by the projection display unit in real time is consistent with the position of the expanded screen.

In this embodiment, the control instruction is a power-on instruction. In practical applications, the user may send a control instruction to the main control device through the aforementioned control device, or may trigger the control instruction through a hardware structure (for example, a start button) disposed on the laser television.

In combination with the scene illustration, the main control device sends a first startup control instruction to the screen control unit according to the startup instruction. And the screen control unit is used for controlling the screen to be unfolded from the initial position to the zero position according to the first starting control instruction and then returning a first starting preparation message to the main control device. The zero position may be a preset position, for example, a starting position of the rollable screen corresponds to a position of the screen when the screen is completely retracted, and the zero position refers to a critical position when the screen is about to be unfolded. In some cases the starting position and the zero position may be the same, in other cases the zero position is the position of the screen immediately before it is lifted from the box, i.e. the position where the screen is lifted flush with the upper surface of the box, in connection with the laser television shown in fig. 3b as an example.

In addition, the main control device also transmits a second startup control instruction to the projection display unit according to the startup instruction (the transmission sequence of the first startup control instruction and the second startup control instruction is not limited). And the projection display unit returns a second startup preparation message to the main control device after performing display preparation (such as initialization execution and the like) according to the second startup control instruction. After receiving the first startup preparation message and the second startup preparation message, the main control device indicates that the preparation of screen lifting and projection display is completed at the moment, and sends an unfolding instruction to the screen control unit, and the screen control unit controls the screen to be unfolded continuously from the zero position to the vertex position according to the unfolding instruction. The vertex position here may be preset, for example, a position that is normally set when the user views the television, or a position where the maximum size of the screen support extension is located, or a position that is set by default, which is not limited thereto.

In the process of expanding the screen from the zero point position to the vertex position, the main control device acquires the position information of the expanded screen from the screen control unit in real time and sends the position information to the projection display unit. The projection display unit correspondingly adjusts the projection area of the projection equipment according to the position information of the unfolded screen, so that the area of the display picture is always consistent with the screen area.

In one implementation, the laser television further includes a power supply unit, which needs to convert ac mains to power required by each module, and the power supply usually has different specifications, for example, 18V for an audio component, 12V/18V for a main control device, and so on. In one example, the power supply control of the projection display unit and the screen control unit is uniformly responsible for the master control device, i.e. the master control device controls when the power supply unit supplies power to the two modules so as to optimize the power supply control strategy, thereby realizing effective control and saving electricity consumption.

In one embodiment, in a power-on scenario, the control instruction includes a power-on instruction; also included before 102 is: and sending a power supply instruction to a power supply unit according to the control instruction, wherein the power supply instruction is used for indicating the power supply unit to supply power to the screen control unit and the projection display unit. Specifically, after the power supply unit supplies power to the screen control unit and the projection display unit, the main control device can communicate with the screen control unit and the projection display unit so as to realize the control method of the application.

In combination with the aforementioned laser television integrating the projection device and the screen, in a startup scene, the screen control unit also needs to control power supply of modules (such as a flip drive mechanism and a screen drive mechanism) related to screen rising, and corresponding control instructions include startup instructions; the first startup control instruction is used for instructing the screen control unit to execute the following steps: powering the flip cover transmission mechanism and indicating the flip cover transmission mechanism to execute flip cover operation; after the flip operation is finished, supplying power to the screen transmission mechanism, and indicating the screen transmission mechanism to operate so as to enable the screen to be unfolded from the initial position to the zero position; and returning a first startup preparation message.

Specifically, the main control device sends a first starting control instruction to the screen control unit according to the starting instruction; the screen control unit supplies power to the flip transmission mechanism according to the first starting control instruction so as to execute flip operation and detect whether the flip is in place or not; if the flip cover is in place, power is supplied to the screen transmission mechanism to control the screen to be unfolded, and if the flip cover cannot be in place, error reporting processing is carried out. In the subsequent process of expanding the screen, the projection area is kept consistent with the expanded screen by synchronizing the position of the expanded screen to the projection display unit. According to the embodiment, the modules are controlled to cooperatively operate to finish synchronous ascending of the display picture and the screen, and normal starting-up operation of the integrated laser television is ensured.

In combination with the integrated laser television, in a startup scene, the screen control unit also needs to control power supply of a module (such as a sliding cover transmission mechanism) related to projection display, and correspondingly, the second startup control instruction is used for instructing the projection display unit to execute the following steps: supplying power to the sliding cover transmission mechanism and indicating the sliding cover transmission mechanism to execute sliding cover opening operation; after the sliding cover is opened, executing display initialization; and returning a second startup preparation message.

Specifically, the main control device sends a second starting control instruction to the projection display unit according to the starting instruction; the projection display unit supplies power to the sliding cover transmission mechanism according to the second starting control instruction so as to execute sliding cover opening operation and detect whether the sliding cover is opened in place or not; if the sliding cover is opened in place, the second startup preparation message is returned after the display initialization is executed, and if the sliding cover is not opened in place, the error reporting process is carried out. And in the subsequent process of expanding the screen, receiving the position of the expanded screen synchronized by the main control device, and keeping the projection area consistent with the expanded screen. According to the embodiment, the modules are controlled to cooperatively operate to finish synchronous ascending of the display picture and the screen, and normal starting-up operation of the integrated laser television is ensured.

In the control method of the laser television provided by the embodiment, the main control device firstly sends a startup control instruction to the screen control unit and the projection display unit under the startup scene, after the startup control instruction and the startup control instruction are prepared, the main control device sends an unfolding instruction to the screen control unit to execute screen unfolding, in the process of screen unfolding, the position information of the unfolded screen is acquired from the screen control unit in real time and is sent to the projection display unit of the projection device, the projection display unit adjusts the position of the projection area in real time based on the position information, and the projection area is kept consistent with the position of the unfolded screen in the process of screen unfolding or retraction. According to the scheme, in the starting-up process of the laser television, the positions of the projection area and the unfolded screen are kept consistent, so that the effective control of the laser television is realized through synchronous linkage of the projection area and the screen position. In addition, the expanded screen position in the scheme is acquired and transmitted in real time, so that linkage failure caused by single-side equipment change can be effectively avoided, and the stability of starting control of the laser television is improved.

Fig. 7 is a schematic flow chart of a control method of a laser television according to a third embodiment of the present application, where, as shown in fig. 7, a scene in this embodiment relates to a startup scene, and on the basis of any embodiment, the control instruction includes a shutdown instruction; 102 specifically includes:

701. According to the shutdown instruction, a retraction instruction is sent to the screen control unit, and the retraction instruction is used for indicating the screen control unit to control the screen to retract to a starting position and returning a first shutdown preparation message;

correspondingly, 103 specifically includes:

702. in the process that the screen is retracted to the zero position, position information of the unfolded screen is acquired from the screen control unit in real time and is sent to a projection display unit of the projection equipment, so that the position of a projection area is adjusted by the projection display unit in real time to be consistent with the position of the unfolded screen;

wherein, after 701, further comprising:

703. if the screen is retracted to the zero position, a backlight closing instruction is sent to the projection display unit, and the backlight closing instruction is used for indicating the projection display unit to end projection and returning a second shutdown preparation message;

704. and receiving the first shutdown preparation message and the second shutdown preparation message to finish shutdown processing.

In this embodiment, the control instruction is a shutdown instruction. In practical applications, the user may send a control instruction to the main control device through the aforementioned control device, or may trigger the control instruction through a hardware structure (for example, a shutdown key) disposed on the laser television.

The main control device sends a retraction instruction to the screen control unit according to the shutdown instruction by combining with the scene for illustration. And the screen control unit is used for controlling the screen to be retracted to the initial position according to the retraction instruction and returning a first shutdown preparation message to the main control device. In the process of screen retraction, the main control device acquires the position information of the unfolded screen from the screen control unit in real time and sends the position information to the projection display unit. The projection display unit correspondingly adjusts the projection area of the projection equipment according to the position information of the unfolded screen, so that the area of the display picture is always consistent with the screen area.

In addition, in the screen retraction process, the main control device detects that the screen reaches the zero position, and then sends a backlight closing instruction to the projection display unit. I.e. the screen has been retracted to a position not visible to the user at this point, and the projection can be turned off. And after the projection display unit turns off the backlight according to the backlight turn-off instruction, returning a second shutdown preparation message to the main control device. After receiving the first shutdown preparation message and the second shutdown preparation message, the main control device indicates that the projection display unit and the screen control unit have completed shutdown preparation, and the main control device completes shutdown processing.

Also in one example, the power supply control of the projection display unit and the screen control unit is uniformly responsible for the master control device. In one implementation, in a shutdown scenario, 704 specifically includes: receiving the first shutdown preparation message and the second shutdown preparation message; and sending a power-off instruction to a power supply unit, wherein the power-off instruction is used for instructing the power supply unit to stop supplying power to a screen control unit of the screen and a projection display unit of the projection equipment. In practical application, the main control device controls the projection display unit and the screen control unit to enter a standby mode after power is off, so as to save the electricity consumption of the laser television.

In combination with the aforementioned laser television integrating the projection device and the screen, in a shutdown scenario, the screen control unit needs to control the power supply of the module (such as the flip drive mechanism and the screen drive mechanism) related to the retraction of the screen, and accordingly, the retraction instruction is used to instruct the screen control unit to execute the following steps: controlling the screen to retract to a starting position; instructing the flip drive mechanism to perform a closing action; and after detecting that the flip cover is closed, returning a first shutdown preparation message.

Specifically, the main control device sends a retraction instruction to the screen control unit according to the shutdown instruction; the screen control unit supplies power to the screen transmission mechanism according to the retraction instruction so as to retract the screen to the initial position, and then supplies power to the flip transmission mechanism so as to execute flip closing operation and detect whether the closing is in place; if the flip is closed in place, a first shutdown preparation message is returned to the main control device, and if the flip cannot be closed in place, error reporting processing is carried out. According to the embodiment, the modules are controlled to cooperatively operate to finish synchronous descending of the display picture and the screen, and normal shutdown of the integrated laser television is ensured.

In combination with the integrated laser television, in a shutdown scenario, the screen control unit also needs to control power supply of a module (such as a sliding cover transmission mechanism) related to projection display, and correspondingly, the backlight closing instruction is used for instructing the projection display unit to execute the following steps: turning off the backlight and ending projection; instructing the slider drive to perform a closing action; and after detecting that the sliding cover is closed, returning a second shutdown preparation message.

Specifically, the main control device instructs the screen control unit to retract the screen to the starting position according to the shutdown instruction. Before the screen reaches the zero point position, the main control device sends the position of the unfolded screen to the projection display unit in real time so as to keep the projection area consistent with the unfolded screen. When the screen reaches the zero position, a backlight closing instruction is sent to the projection display unit; the projection display unit turns off the backlight according to the backlight turn-off instruction, supplies power to the sliding cover transmission mechanism to execute the sliding cover turn-off operation, and detects whether the sliding cover is turned off in place; if the sliding cover is closed in place, a second startup preparation message is returned to the main control device, otherwise, error reporting processing is carried out. According to the embodiment, the modules are controlled to cooperatively operate to finish synchronous descending of the display picture and the screen, and normal shutdown of the integrated laser television is ensured.

In addition, in view of safety during working, in one embodiment, the retraction instruction is further configured to instruct the screen control unit to control the screen to retract to the start position and return a first shutdown preparation message if it is determined that no person is within a preset range around the screen according to a detection result of the human body sensor. Specifically, after receiving the retraction instruction sent by the main control device, the screen control unit detects whether people are close to the periphery through the human body sensor, and if not, the shutdown process is executed, so that the user is prevented from being pinched in the screen retraction process, and the safety is improved. In one implementation, if a person is detected, shutdown may be paused and prompted, such as, but not limited to: picture cues (e.g., display "off on screen, please get away from the device"), voice cues (e.g., output "off, please get away from the television"), etc.

In the control method of the laser television provided by the embodiment, the main control device firstly sends a retraction instruction to the screen control unit under the shutdown scene, the screen is controlled to retract to the initial position, the position information of the extended screen is obtained from the screen control unit in real time before the screen reaches the zero position and is sent to the projection display unit of the projection device, the projection display unit adjusts the position of the projection area in real time based on the position information, and the projection area is kept consistent with the position of the extended screen in the process of expanding or retracting the screen. And after the screen reaches the zero position, the projection display unit is instructed to turn off the backlight, and the shutdown processing is completed. According to the scheme, in the shutdown process of the laser television, the positions of the projection area and the unfolded screen are kept consistent, so that the effective control of the laser television is realized through synchronous linkage of the projection area and the screen position. In addition, the expanded screen position in the scheme is acquired and transmitted in real time, so that linkage failure caused by single-side equipment change can be effectively avoided, and the stability of starting control of the laser television is improved.

For a better understanding of the solution, examples are presented in connection with an integrated laser television. As shown in fig. 8a, fig. 8a is a schematic diagram of a control system of a laser television according to a fourth embodiment of the present application, where the control device is installed in the laser television, and the control system includes a main control device, a projection display unit, a screen control unit, a power supply unit, a flip drive mechanism, a slide drive mechanism, a screen drive mechanism, a foreign object detection unit, and the like. These units are divided according to the functional levels shown in table 1.

TABLE 1

	Primary functional unit	Two-stage functional unit	Three-stage functional unit
Main control device	√
Power supply unit		√
Projection display unit		√
Screen control unit		√
Foreign matter detection unit		√
Sliding cover transmission mechanism			√
Lifting transmission mechanism			√
Flip drive mechanism			√

The primary functional unit is responsible for managing the secondary functional unit, the secondary functional unit is responsible for managing the tertiary functional unit, and the primary functional unit cannot directly manage the tertiary functional unit. In connection with the flowcharts in the different scenarios shown in fig. 8b to 8d (on mode, linked off mode, direct off mode respectively), the following functions of the units are understood:

1. the main control device: the control center of the whole system. The device mainly comprises four secondary functional units, namely a power supply unit, a projection display unit, a screen control unit and a foreign matter detection unit. And controlling which time of the power supply unit supplies power to which functional module. The projection display unit is controlled to project an image at which time and turn off the backlight at which time. And controlling the screen control unit to start to lift and lower the screen at any moment, and adjusting the position of the projection area in real time according to the lifting height, the lifting moment, the descending height and the descending moment curve (an information mode of the position information of the unfolded screen) fed back by the screen control unit, so that the synchronization of the projection area and the lifting of the screen is realized. In practical application, an RS232 communication mode is adopted between an audio and video processing and control module and a screen control unit in the main control device. The main communication commands include startup, shutdown, ascending, pause, descending, pause, acceleration, deceleration, abnormal zero state and the like.

2. A power supply unit: the secondary functional unit is used for providing power for each functional unit and is controlled by the primary functional unit.

3. Projection display unit: and the secondary functional unit is used for providing brightness control information and color control information required by image display. Executing and feeding back the laser projection display function and the completion state of the opening/closing action of the sliding cover, and ensuring that the sliding cover is not opened in place and cannot be used for outputting backlight so as to avoid light paths being blocked by the sliding cover.

4. Screen control unit: the secondary functional unit mainly comprises a screen control unit, a lifting driving unit, a screen transmission mechanism, a flip driving unit and a flip transmission mechanism unit. And receiving a control instruction sent by the main control device through the RS232 communication interface. The screen lifting and the flip opening/closing are executed, and feedback is given to the main control device whether abnormal states exist, such as ascending locked rotation, descending locked rotation, flip not in place and the like. And feeding back the screen to the main control device to the zero position, the completion of on/off preparation, and the like.

5. Foreign matter detection unit: and the secondary functional unit is used for detecting whether an obstacle exists in the lifting direction before the screen is lifted, stopping lifting if the obstacle exists in the lifting direction, and executing lifting action after the obstacle is removed. In addition, the hand clamping prevention function is used for detecting whether a person approaches in the descending process of the lifting screen, if so, suspending the descending action of the screen, and starting the descending after the person is far away from the detection area.

6. Sliding cover driving unit and sliding cover transmission mechanism: the three-level functional unit comprises a motor driving module, a motor, a transmission mechanism, a limit switch when the sliding cover is opened and closed, and the like. When the sliding cover is opened in place and closed in place, the feedback state to the projection display unit is normal. When the sliding cover function is opened and closed in place, the feedback state is abnormal.

7. Flip drive unit and flip drive mechanism: the three-level functional unit comprises a motor driving module, a motor, a transmission mechanism, a limit switch when the flip is opened and closed, and the like. And after the flip cover is opened in place and closed in place, feeding back the normal state to the screen control unit. When the flip function is not in place, the feedback state is abnormal.

8. Screen transmission mechanism: the three-stage functional unit comprises a motor driving module, a motor, a transmission mechanism, a zero position limit switch and the like. The motor comprises a lifting screen motor and a screen curling motor. The screen lifting motor is provided with an encoder, the angular speed of the motor can be measured through the encoder when the motor rotates, and according to the mechanism transmission design principle, the angular speed of the motor can be converted into the linear speed of screen lifting, so that the main control device synchronizes the linear speed of screen lifting to the projection display unit, the projection display unit adjusts the projection area to follow according to the linear speed of screen lifting, and the projection display unit and the projection area synchronously ascend and descend. In one implementation, the motor has a power-off band-type brake function, and when the screen ascends to the vertex position, the motor is powered off, and the motor has the power-off band-type brake function, so that the screen is ensured not to naturally fall, the power consumption of the whole machine is reduced, and the reliability of a product is improved.

It should be noted that, the figure shows a shutdown flow in a direct shutdown mode, in which the projection area and the screen do not adopt a synchronous linkage lifting mode, so as to support the rapid recovery of the screen, and reduce the time required for shutdown.

Fig. 9 is a schematic structural diagram of a master control device according to a fifth embodiment of the present application, where the master control device is disposed in a control system of a laser television, and the control system includes the master control device, a projection display unit, and a screen control unit; as shown in fig. 9, the master control apparatus includes:

a receiving module 91, configured to receive a control instruction, where the control instruction is used to instruct the screen to be deployed or retracted to a target position;

the processing module 92 is configured to send a corresponding instruction to a screen control unit of the screen according to the control instruction, so as to control the screen to be expanded or retracted to a target position;

the processing module 92 is further configured to obtain, in real time, position information of the expanded screen from the screen control unit during the process of expanding or retracting the screen, and send the position information to the projection display unit of the projection device, so that the position of the projection area is adjusted in real time by the projection display unit to be consistent with the position of the expanded screen.

In one embodiment, the processing module 92 is further configured to send, before sending a corresponding instruction to a screen control unit of the screen according to the control instruction, a first detection instruction to a foreign object detection unit, where the first detection instruction is used to instruct the foreign object detection unit to detect whether there is an obstacle in the direction of deployment or retraction of the screen and return a detection result; correspondingly, the processing module 92 is specifically configured to send a corresponding instruction to the screen control unit of the screen to control the screen to be unfolded or retracted to the target position if no obstacle exists according to the detection result of the foreign object detection unit.

In one embodiment, the control instruction includes a power-on instruction; the processing module 92 is further specifically configured to send a first startup control instruction to the screen control unit according to the startup instruction, where the first startup control instruction is used to instruct the screen control unit to control the screen to expand from a starting position to a zero position and return a first startup preparation message; the processing module 92 is further specifically configured to send a second startup control instruction to the projection display unit according to the startup instruction, where the second startup control instruction is used to instruct the projection display unit to complete display initialization and return a second startup preparation message; the processing module 92 is further specifically configured to send an expansion instruction to the screen control unit after receiving the first startup preparation message and the second startup preparation message; the expansion instruction is used for instructing the screen control unit to control the screen to be expanded to the vertex position; the processing module 92 is further specifically configured to obtain, in real time, position information of the expanded screen from the screen control unit and send the position information to the projection display unit of the projection device in a process that the screen expands from the zero position to the vertex position, so that the position of the projection area is adjusted in real time by the projection display unit to be consistent with the position of the expanded screen.

In one embodiment, the processing module 92 is further configured to send a power supply instruction to a power supply unit according to the control instruction, where the power supply instruction is used to instruct the power supply unit to supply power to the screen control unit and the projection display unit.

In one embodiment, the control instruction includes a shutdown instruction; the processing module 92 is specifically configured to send a retraction instruction to the screen control unit according to the shutdown instruction, where the retraction instruction is used to instruct the screen control unit to control the screen to retract to a starting position and return a first shutdown preparation message; the processing module 92 is further specifically configured to obtain, in real time, position information of the expanded screen from the screen control unit and send the position information to a projection display unit of the projection device, so that the position of the projection area is adjusted in real time by the projection display unit to be consistent with the position of the expanded screen in the process of retracting the screen to the zero position; the processing module 92 is further configured to send a backlight shutdown instruction to the projection display unit if the screen is retracted to the zero position, where the backlight shutdown instruction is used to instruct the projection display unit to end projection and return a second shutdown preparation message; the processing module 92 is further configured to receive the first shutdown preparation message and the second shutdown preparation message, and complete shutdown processing.

In one embodiment, the processing module 92 is specifically configured to receive the first shutdown preparation message and the second shutdown preparation message; and sending a power-off instruction to a power supply unit, wherein the power-off instruction is used for instructing the power supply unit to stop supplying power to a screen control unit of the screen and a projection display unit of the projection equipment.

The main control device provided by the embodiment sends an instruction to the screen control unit of the screen to control the expansion or retraction of the screen, and in the process of expanding or retracting the screen, the position information of the expanded screen is acquired from the screen control unit in real time and is sent to the projection display unit of the projection device, and the projection display unit adjusts the position of the projection area in real time based on the position information, so that the projection area is consistent with the position of the expanded screen in the process of expanding or retracting the screen. According to the scheme, the projection area and the position of the unfolded screen are kept consistent in the process of unfolding or retracting the screen, so that the effective control of the laser television is realized through synchronous linkage of the projection area and the position of the screen. In addition, the expanded screen position in the scheme is acquired and transmitted in real time, so that linkage failure caused by single-side equipment change can be effectively avoided, and the stability of laser television control is improved.

Fig. 10 is a schematic structural diagram of a master control device according to a sixth embodiment of the present application, where, as shown in fig. 10, the master control device includes:

a processor 291, the master device further comprising a memory 292; a communication interface (Communication Interface) 293 and bus 294 may also be included. The processor 291, the memory 292, and the communication interface 293 may communicate with each other via the bus 294. Communication interface 293 may be used for information transfer. The processor 291 may call logic instructions in the memory 294 to perform the methods of the above embodiments.

Further, the logic instructions in memory 292 described above may be implemented in the form of software functional units and stored in a computer-readable storage medium when sold or used as a stand-alone product.

The memory 292 is a computer readable storage medium, and may be used to store a software program, a computer executable program, and program instructions/modules corresponding to the methods in the embodiments of the present application. The processor 291 executes functional applications and data processing by running software programs, instructions and modules stored in the memory 292, i.e., implements the methods of the method embodiments described above.

Memory 292 may include a storage program area that may store an operating system, at least one application program required for functionality, and a storage data area; the storage data area may store data created according to the use of the terminal device, etc. Further, memory 292 may include high-speed random access memory, and may also include non-volatile memory.

In an exemplary embodiment of the present application, there is also provided a laser television including: a projection device, a rollable screen, a projection display unit for controlling the projection device, a screen control unit for controlling the rollable screen, and a master device as described above.

In an exemplary embodiment, a computer-readable storage medium storing computer-executable instructions for implementing the above method when executed by a processor is also provided. For example, the computer readable storage medium may be ROM, random Access Memory (RAM), CD-ROM, magnetic tape, floppy disk, optical data storage device, etc.

In an exemplary embodiment, a computer program product is also provided, comprising a computer program which, when executed by a processor, implements the above method.

Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of the application following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the application pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.

It is to be understood that the application is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the application is limited only by the appended claims.

Claims

A control method of a laser television, characterized in that the laser television comprises a projection device and a rollable screen; the control method comprises the following steps:

receiving a control instruction, wherein the control instruction is used for indicating to expand or retract the screen to a target position;

according to the control instruction, a corresponding instruction is sent to a screen control unit of the screen so as to control the screen to be unfolded or retracted to a target position; the method comprises the steps of,

And in the process of expanding or retracting the screen, acquiring the position information of the expanded screen from the screen control unit in real time, and sending the position information to a projection display unit of the projection equipment so that the position of the projection area adjusted by the projection display unit in real time is consistent with the position of the expanded screen.
The method of claim 1, wherein the control instruction comprises a power-on instruction; and sending a corresponding instruction to a screen control unit of the screen according to the control instruction so as to control the screen to be unfolded or retracted to a target position, wherein the method comprises the following steps of:

according to the starting-up instruction, a first starting-up control instruction is sent to the screen control unit, and the first starting-up control instruction is used for instructing the screen control unit to control the screen to be unfolded from a starting position to a zero position and returning a first starting-up preparation message;

according to the starting-up instruction, a second starting-up control instruction is sent to the projection display unit, and the second starting-up control instruction is used for indicating the projection display unit to finish display initialization and returning a second starting-up preparation message;

after receiving the first startup preparation message and the second startup preparation message, sending an unfolding instruction to the screen control unit; the expansion instruction is used for instructing the screen control unit to control the screen to be expanded to the vertex position;

The process of expanding or retracting the screen, acquiring the position information of the expanded screen from the screen control unit in real time, and sending the position information to a projection display unit of the projection device, so that the position of the projection area adjusted by the projection display unit in real time is consistent with the position of the expanded screen, comprises the following steps:

and in the process of expanding the screen from the zero point position to the vertex position, acquiring the position information of the expanded screen from the screen control unit in real time, and sending the position information to a projection display unit of the projection equipment so that the position of the projection area adjusted by the projection display unit in real time is consistent with the position of the expanded screen.
The method according to claim 2, wherein the sending, according to the control instruction, a corresponding instruction to a screen control unit of the screen to control the screen to be deployed or retracted to a target position, further comprises:

and sending a power supply instruction to a power supply unit according to the control instruction, wherein the power supply instruction is used for indicating the power supply unit to supply power to the screen control unit and the projection display unit.
The method of claim 2, wherein the first power-on control instruction is configured to instruct the screen control unit to perform the steps of: powering the flip cover transmission mechanism and indicating the flip cover transmission mechanism to execute flip cover operation; after the flip operation is finished, supplying power to the screen transmission mechanism, and indicating the screen transmission mechanism to operate so as to enable the screen to be unfolded from the initial position to the zero position; and returning a first startup preparation message.
The method of claim 2, wherein the second power-on control instruction is configured to instruct the projection display unit to perform the steps of: supplying power to the sliding cover transmission mechanism and indicating the sliding cover transmission mechanism to execute sliding cover opening operation; after the sliding cover is opened, executing display initialization; and returning a second startup preparation message.
The method of claim 1, wherein the control instruction comprises a shutdown instruction; and sending a corresponding instruction to a screen control unit of the screen according to the control instruction so as to control the screen to be unfolded or retracted to a target position, wherein the method comprises the following steps of:

according to the shutdown instruction, a retraction instruction is sent to the screen control unit, and the retraction instruction is used for indicating the screen control unit to control the screen to retract to a starting position and returning a first shutdown preparation message;

the process of expanding or retracting the screen, acquiring the position information of the expanded screen from the screen control unit in real time, and sending the position information to a projection display unit of the projection device, so that the position of the projection area adjusted by the projection display unit in real time is consistent with the position of the expanded screen, comprises the following steps:

In the process that the screen is retracted to the zero position, position information of the unfolded screen is acquired from the screen control unit in real time and is sent to a projection display unit of the projection equipment, so that the position of a projection area is adjusted by the projection display unit in real time to be consistent with the position of the unfolded screen;

after sending a retraction instruction to a screen control unit of the screen according to the shutdown instruction, the method further comprises the following steps:

if the screen is retracted to the zero position, a backlight closing instruction is sent to the projection display unit, and the backlight closing instruction is used for indicating the projection display unit to end projection and returning a second shutdown preparation message;

and receiving the first shutdown preparation message and the second shutdown preparation message to finish shutdown processing.
The method of claim 6, wherein the receiving the first shutdown preparation message and the second shutdown preparation message completes a shutdown process, comprising:

receiving the first shutdown preparation message and the second shutdown preparation message;

and sending a power-off instruction to a power supply unit, wherein the power-off instruction is used for instructing the power supply unit to stop supplying power to a screen control unit of the screen and a projection display unit of the projection equipment.
The method of claim 6, wherein the retraction instruction is for instructing the screen control unit to: controlling the screen to retract to a starting position; instructing the flip drive mechanism to perform a closing action; and after detecting that the flip cover is closed, returning a first shutdown preparation message.
The method of claim 6, wherein the backlight off instruction is configured to instruct the projection display unit to perform the steps of: turning off the backlight and ending projection; instructing the slider drive to perform a closing action; and after detecting that the sliding cover is closed, returning a second shutdown preparation message.
The method according to claim 6, wherein the retraction instruction is further configured to instruct the screen control unit to control the screen to retract to the start position and return the first shutdown preparation message if it is determined that no person is within a preset range around the screen according to the detection result of the human body sensor.
The method according to any one of claims 1-10, wherein the sending, according to the control instruction, a corresponding instruction to a screen control unit of the screen to control the screen to be deployed or retracted to a target position, further comprises:

A first detection instruction is sent to a foreign matter detection unit, and the first detection instruction is used for indicating the foreign matter detection unit to detect whether an obstacle exists in the expanding or retracting direction of the screen or not and returning a detection result;

and sending a corresponding instruction to a screen control unit of the screen according to the control instruction so as to control the screen to be unfolded or retracted to a target position, wherein the method comprises the following steps of:

and according to the detection result of the foreign matter detection unit, if no obstacle exists, sending a corresponding instruction to a screen control unit of the screen so as to control the screen to be unfolded or retracted to a target position.
The main control device is characterized by being arranged in a control system of the laser television, and the control system comprises the main control device, a projection display unit and a screen control unit; the master control device includes:

the receiving module is used for receiving a control instruction, wherein the control instruction is used for indicating to expand or retract the screen to a target position;

the processing module is used for sending a corresponding instruction to a screen control unit of the screen according to the control instruction so as to control the screen to be unfolded or retracted to a target position;

The processing module is further configured to acquire, in real time, position information of the expanded screen from the screen control unit during the process of expanding or retracting the screen, and send the position information to a projection display unit of the projection device, so that the position of the projection area is adjusted in real time by the projection display unit to be consistent with the position of the expanded screen.
The main control device is characterized by being arranged in a control system of the laser television, and the control system comprises the main control device, a projection display unit and a screen control unit; the master control device includes: a memory, a processor;

a memory; a memory for storing the processor-executable instructions;

wherein the processor is configured to: the method of any of claims 1-11 being performed in accordance with the executable instructions.
A laser television, comprising: a projection device, a rollable screen, a projection display unit for controlling the projection device, a screen control unit for controlling the rollable screen, and a master device according to claim 12.