CN115243020A

CN115243020A - Image following method for projection equipment during screen lifting and projection equipment

Info

Publication number: CN115243020A
Application number: CN202210843967.0A
Authority: CN
Inventors: 修建竹
Original assignee: Hisense Visual Technology Co Ltd
Current assignee: Hisense Visual Technology Co Ltd
Priority date: 2022-07-18
Filing date: 2022-07-18
Publication date: 2022-10-25

Abstract

The application provides an image following method for a projection device during screen lifting and a projection device, which monitor the moving height of a screen in the moving process through a monitoring assembly. The screen is a rollable screen. And after receiving the moving height of the screen, the controller calculates the projection height according to the moving height by using a preset rule. The preset rule specifies a mapping relationship between the movement height and the projection height. And finally, controlling the projection assembly to project an image with corresponding height to the screen according to the projection height. According to the embodiment of the application, the height of the image needing to be projected can be calculated according to the moving height of the screen in the screen moving process, the effect that the image synchronously rises and falls along with the screen is achieved, and therefore the watching experience of a user is improved.

Description

Image following method for projection equipment during screen lifting and projection equipment

Technical Field

The application relates to the technical field of projection equipment, in particular to an image following method for the lifting of a screen of the projection equipment and the projection equipment.

Background

The television technology has undergone three technical iterations of black and white televisions, color televisions and digital televisions represented by liquid crystal televisions, PDPs, OLEDs and the like, and a fourth generation television display technology, namely a laser television technology, for matching laser projection equipment and screens has appeared at present. Laser televisions currently include primarily a laser projection device and a screen. Due to the large size of the screen, a liftable screen realized by curling is currently appearing to reduce the size of the product.

The development of laser television technology has presented diversified new forms at present, and television and liftable screen integration is just one of them. When the laser television with the new form is turned on or off, the projected image can not be lifted along with the screen, so that the user watching experience is poor. Therefore, for the laser television with the new form, a mechanism is urgently needed to ensure that the image can synchronously follow the lifting in the screen lifting process.

Disclosure of Invention

The application provides an image following method for projection equipment during screen lifting and projection equipment, which are used for solving the problem that the user watching experience is poor due to the fact that the projected image follows lifting when a screen cannot be guaranteed to lift when a television is turned on and turned off in a new state of a laser television.

In a first aspect, the present embodiment provides a projection apparatus, including:

a projection assembly configured to project an image to a screen, the screen being a liftable screen;

the monitoring component is configured to monitor the moving height of the screen during the screen moving process and feed back the moving height to the controller;

a controller configured to:

calculating a projection height according to the movement height by using a preset rule, wherein the preset rule specifies a mapping relation between the movement height and the projection height;

and controlling the projection assembly to project an image with corresponding height to the screen according to the projection height.

In a second aspect, the present embodiment provides an image following method when a screen of a projection apparatus is lifted, the projection apparatus including,

a projection component configured to project an image onto a screen, the screen being a liftable screen; a monitoring component configured to monitor a moving height of the screen during the screen movement and to feed back the moving height to a controller, the method comprising:

According to the image following method for the projection equipment and the projection equipment, the moving height of the screen in the moving process is monitored through the monitoring assembly. The screen is a rollable screen. And after receiving the moving height of the screen, the controller calculates the projection height according to the moving height by using a preset rule. The preset rule specifies a mapping relationship between the movement height and the projection height. And finally, controlling the projection assembly to project an image with corresponding height to the screen according to the projection height. According to the embodiment of the application, the height of the image needing to be projected can be calculated according to the moving height of the screen in the screen moving process, the effect that the image synchronously rises and falls along with the screen is achieved, and therefore the watching experience of a user is improved.

Drawings

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

Fig. 1 is a schematic diagram schematically illustrating an operation scenario between a laser television and a control device according to an embodiment;

fig. 2 is a block diagram schematically showing a configuration of the control apparatus 100 according to an exemplary embodiment;

fig. 3 schematically illustrates a hardware configuration of the laser television 200 according to an exemplary embodiment;

fig. 4 is a schematic diagram illustrating a hardware configuration of still another laser television 200 according to an exemplary embodiment;

fig. 5 is a schematic structural diagram schematically illustrating a laser projection apparatus provided by an embodiment of the present application;

fig. 6 is a schematic diagram illustrating a framework of a stateful switchover mechanism provided in an embodiment of the present application;

fig. 7 is a schematic diagram illustrating a screen ascending curve provided by an embodiment of the present application;

fig. 8 is a schematic diagram illustrating a screen image acquired by an image acquisition device provided by an embodiment of the present application;

fig. 9 is a schematic diagram illustrating a screen image acquired by another image acquisition apparatus provided by an embodiment of the present application;

fig. 10 is a signaling diagram illustrating a method for implementing a state switch according to an embodiment of the present application;

fig. 11 is a signaling diagram illustrating another implementation method for switching states according to an embodiment of the present application;

fig. 12 is a signaling diagram illustrating still another implementation method for switching states according to an embodiment of the present application;

fig. 13 is a signaling diagram schematically illustrating a screen lifting state switching method of a projection device according to an embodiment of the present application;

fig. 14 is a schematic projection diagram illustrating a projection device according to an embodiment of the present application when a screen is in a raised state;

FIG. 15 is a schematic diagram illustrating a projection of a projection device according to an embodiment of the present application with a screen at a highest point;

FIG. 16 is a schematic diagram illustrating a projection of a projection apparatus according to an embodiment of the present application in a screen image descending state;

fig. 17 is a signaling diagram of an image following method when a screen of a projection device rises and falls according to an embodiment of the present invention.

With the above figures, there are shown specific embodiments of the present application, which will be described in more detail below. These drawings and written description are not intended to limit the scope of the inventive concepts in any manner, but rather to illustrate the inventive concepts to those skilled in the art by reference to specific embodiments.

Detailed Description

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

It should be noted that the brief descriptions of the terms in the present application are only for convenience of understanding of the embodiments described below, and are not intended to limit the embodiments of the present application. These terms should be understood in their ordinary and customary meaning unless otherwise indicated.

The terms "comprises" and "comprising," 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 explicitly listed, but may include other elements not expressly listed or inherent to such product or apparatus. The term "module" or "component" as used herein 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 functionality 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 (e.g., a display device as disclosed herein) that is capable of wirelessly controlling the electronic device, typically over a relatively short distance. The component may typically be connected to the electronic device 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 the common remote control device with the user interface in the touch screen.

Fig. 1 is a schematic diagram schematically illustrating an operation scenario between a laser television and a control device according to an embodiment. As shown in fig. 1, a user can operate the laser television 200 through the control device 100.

The control device 100 may be a remote controller 100A, which can communicate with the laser television 200 through an infrared protocol communication, a bluetooth protocol communication, a ZigBee (ZigBee) protocol communication, or other short-distance communication, and is used to control the laser television 200 through a wireless or other wired manner. The user can input a user instruction through a key on the remote control 100A, voice input, control panel input, or the like to control the laser television 200. Such as: the user can input a corresponding control instruction through an up/down key, a volume up/down key, a channel control key, up/down/left/right movement keys, a voice input key, a menu key, an on/off key, etc. of the screen 201 on the remote controller 100A, thereby implementing a function of controlling the laser television 200.

The control device 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 Area Network (LAN), a Wide Area Network (WAN), a Wireless Local Area Network (WLAN), or other networks, and implement control of the laser television 200 through an application program corresponding to the laser television 200. For example, 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 201 associated with the smart device.

For example, the mobile terminal 100B and the laser television 200 may each have a software application installed thereon, so that the connection communication between the two can be realized through a network communication protocol, and the purpose of one-to-one control operation and data communication can be further realized. Such as: a control instruction protocol can be established between the mobile terminal 100B and the laser television 200, 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 implement a synchronous display function.

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

Illustratively, laser television 200 receives software program updates, or accesses a remotely stored digital media library by sending and receiving information, and Electronic Program Guide (EPG) interactions. The servers 300 may be a group or groups, and may be one or more types of servers. Other web service contents such as a video on demand and an advertisement service are provided through the server 300.

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

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

In other examples, more or less functionality may be added. The functions of the laser television are not particularly limited in the present application.

Fig. 2 is a block diagram schematically showing the configuration of the control apparatus 100 according to the exemplary embodiment. 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, and to receive an input operation command from a user, and to convert the operation command into a command recognizable and responsive to the laser television 200, so as to mediate interaction between the user and the laser television 200. Such as: the user responds to the channel up/down operation by operating the channel up/down key on the control device 100. The following steps are repeated: the user operates the screen 201 up-down key on the control device 100, and the laser television 200 rises or falls in response to the control screen 201. It should be noted that, in the present application, the term "up" or "down" refers to the installation position of the screen 201, and it is understood that the direction in which the "up" or "down" is located differs depending on the installation position of the screen 201. For example, for the screen 201 installed on the ceiling, the "up" and "down" refer to the change of the screen 201 in the height direction, and for the screen 201 installed on the vertical side wall, the directions of the "up" and "down" are the change in the horizontal direction.

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

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

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

The communicator 130 communicates 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, a bluetooth module, an NFC module, and the like.

A user input/output interface 140, wherein the input interface comprises at least one of a microphone, a touch pad, a sensor, a key, a camera, and the like. Such as: the user can realize a user instruction input function through actions such as voice, touch, gesture, pressing and the like, and the input interface converts the received analog signal into a digital signal and converts the digital signal into a corresponding instruction signal, and sends the instruction signal 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, it may be an infrared interface or 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 sent to the laser television 200 through the infrared sending module. And the following steps: when the rf signal interface is used, a user input command needs to be converted into a digital signal, and then modulated according to the rf control signal modulation protocol, and then transmitted to the laser television 200 through the rf transmitting terminal.

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

Fig. 3 schematically illustrates a hardware configuration of the laser television 200 according to an exemplary embodiment. For convenience of explanation, the laser television 200 in fig. 3 is illustrated by taking an example in which the laser projection device 202 and the screen 201 are separately provided.

As shown in fig. 3, the laser television 200 includes: a laser projection device 202 and a screen 201. The laser projection device 202 is configured to obtain a video to be played, and specifically, the laser projection device 202 may analyze a video signal to be played into an image signal and project the image signal onto the screen 201 to form an image. The screen 201 is used to present a picture to the user.

In the present application, in addition to the manner of separately arranging the laser projection device 202 and the screen 201, in order to reduce the occupied space, in another arrangement manner, the laser projection device 202 and the screen 201 are integrated. As an example, as shown in fig. 4, the laser television 200 of this solution integrates the laser projection device 202 and the screen 201 into a television cabinet, and the television cabinet is provided with a sliding cover and a flip cover for shielding the laser projection device 202 and the screen 201 respectively when the laser television 200 is not in operation. When the laser television 200 is in the working state, the sliding cover and the turnover cover are opened, and the screen 201 is unfolded or retracted through the operation of the screen 201 transmission component.

In the embodiment where the laser projection apparatus 202 is integrated with the screen 201, when the laser projection apparatus 202 is turned on or off, it cannot be guaranteed that the screen 201 is lifted and lowered synchronously. In order to solve the problem, an embodiment of the present invention provides a laser projection device 202, which can ensure that a screen 201 is lifted and lowered synchronously when the laser projection device 202 is turned on and turned off.

Fig. 5 is a schematic structural diagram of a laser projection apparatus 202 provided in an embodiment of the present application, where as shown in fig. 5, the laser projection apparatus 202 includes: a controller 11 provided with a communication terminal, a projection display module 12, a power supply board 13 provided with a power supply terminal, and an audio output module 14; the power supply terminal is used for receiving an external power supply signal, and the power supply board 13 is connected with the controller 11, the projection display component 12 and the audio output component 14; a controller 11 connected with the projection display assembly 12 and the audio output assembly 14; the communication terminal is used for externally connecting the screen 201.

The example is made in connection with the working scene of the laser television: when the power supply terminal is connected to an external power supply signal, the power supply board 13 converts the external power supply signal into a power supply signal and supplies power to the projection display assembly 12 and the audio output assembly 14 under the control of the controller 11; when the communication terminal is connected to the screen 201, the controller 11 analyzes an image signal and an audio signal according to a video signal to be played, instructs the projection display component 12 to project and display a corresponding image to the projection area, and controls the audio output component 14 to output a corresponding audio; the controller 11 also obtains the position information of the screen 201 in real time, and controls the projection area of the projection display assembly 12 to be consistent with the position of the screen 201.

The controller 11 is mainly responsible for controlling the power board 13, the projection display module 12, related components in the screen 201, and the like. For example, the controller 11 controls the power supply board 13 at which time to supply power to which component, so as to optimize the power supply control strategy, achieve effective control and save power consumption. For another example, the controller 11 controls the projection display module 12 at which timing to project an image and which timing to turn off the backlight. For another example, the controller 11 controls the screen 201 at which time to start to raise and lower the screen 201, and adjusts the projection area of the projection display unit 12 at any time according to the raising height, raising time, lowering height, and lowering time fed back from the screen 201, thereby achieving synchronization of the raising and lowering of the projection area and the screen 201.

Specifically, the functions supported by the controller 11 include, but are not limited to, an audio/video codec function, a video signal processing function, and a signal output function (for example, supporting output of a VB1 signal or an LVDS signal). In order to facilitate communication with other components, the controller 11 may also support some data transmission interfaces and software communication protocols corresponding to the data transmission interfaces, such as RS2332 (serial communication protocol is used for corresponding communication protocol), RJ45 (Modbus communication protocol is used for corresponding communication protocol), USB (USB communication protocol is used for corresponding communication protocol), high Definition Multimedia Interface (HDMI for short), and the like. In the figure, the controller 11 and the projection display module use an I2C and General-purpose input/output (GPIO) communication interaction as an example. In practical applications, the controller 11 may be integrated on a motherboard chip of the laser projection apparatus 202, or a multimedia function chip having the above functions may be specially configured to implement the above.

In the present embodiment, the controller 11 can establish connection with the screen 201 through the communication terminal. Connections here include, but are not limited to: a wired communication connection, a wireless communication connection, etc. In the wired connection mode, the communication terminal is a hardware socket, and correspondingly, the screen 201 is provided with a corresponding hardware socket, and the two hardware sockets can establish the wired communication connection through accessing a data line. The main communication commands include, but are not limited to: start-up, shut-down, up, pause, down, acceleration, deceleration, abnormal, zero state, etc.

In this embodiment, the laser projection device 202 further comprises a monitoring component 15, which is primarily responsible for monitoring the current state of the screen 201. In this embodiment, the state of the screen 201 monitored by the monitoring component does not refer to the position state of the screen 201, but is a state preset in the state switching mechanism. The state here is the state information stored in the screen 201 after the last state switching. For example, after the last switching of the state, the state is the top state, and the state information stored in the screen 201 is the top state information. An identification may be set for each state, for example the identification of the top state as T. Before the next switching, the monitoring component reads the state identifier from the storage device of the screen 201, and judges the current state of the screen 201 according to the state identifier. The state switching mechanism is a preset mechanism. After the controller 11 receives the current state of the screen 201 monitored by the monitoring component, the current state of the screen 201 is switched according to the state switching mechanism. Further, the controller 11 controls the screen 201 to perform corresponding operations according to the current state of the switched screen 201. The operation corresponding to the state performed by the screen is a movement operation, for example, an operation of raising, lowering, keeping unmoving, or the like.

For example, if the current state of the screen 201 is a first state and the next state of the first state is a second state in the state switching mechanism, the screen 201 is controlled to switch from the first state to the second state according to the state switching mechanism. Meanwhile, the control screen 201 performs a second state corresponding operation. That is, in the present embodiment, the sequential relationship of the plurality of states of the screen 201 is preset in advance, and the current state of the screen 201 is switched while controlling the screen 201 to perform the corresponding operation in accordance with the preset sequential relationship. Like this, through the lift of state switching direct control screen 201 to when guaranteeing laser projection equipment 202 switching on and shutting down, screen 201 is synchronous to follow and goes up and down, finally promotes the user and watches experience.

The screen related to the embodiment can bear the media resource projected by the projection component, and the media resource is displayed to the user. In some possible embodiments, the screen may be a diffuse reflection screen or a retro-reflective screen. It should be noted that, the present embodiment is only exemplary to show two kinds of screens, and in the process of practical application, the screens may be, but are not limited to, the two kinds of displays, and any screen that has a media resource that can be used for carrying projection of the projection component and can complete a rolling or extending action may be applied to the solution shown in the present embodiment.

The embodiments of the present invention will be described in detail with reference to specific examples. Fig. 6 is a schematic diagram illustrating a framework of a state switching mechanism of a screen 201 according to an embodiment of the present application. The states shown in fig. 6 may be both the first state and the second state. The second state is always the next state to the first state. For example, when the bottom state is the first state, the zero point state is the second state, and when the state is switched, the bottom state is switched to the zero point state. When the zero point state is the first state, the ready-to-rise state is the second state. The zero point state is switched to the ready-to-rise state when the state is switched. This causes the sequential switching to be performed in the order of the arrows shown in fig. 6.

Note that a double arrow is formed between the rising state and the obstacle detection state. That is, when the rising state is the first state, if the obstacle blocking screen movement is detected, the obstacle state is detected as the second state. If the removal of the obstacle is detected, the obstacle state is detected to be a first state, and the ascending state is detected to be a second state. And if the ascending state is the first state and no obstacle is detected to block the screen from moving, the top state is the second state. Similarly, when the descending state is the first state, if the obstacle blocking screen is detected to move, the obstacle state is detected to be the second state. If the removal of the obstacle is detected, the state of the obstacle is detected to be a first state, and the descending state is detected to be a second state. And if the descending state is the first state and no obstacle is detected to block the screen from moving, the bottom state is the second state.

As shown in fig. 6, in the state switching mechanism, if the current state of the screen 201 is the bottom state, the laser projection apparatus 202 is in the power-off state at this time. The bottom state corresponding position is the lowest position where the screen 201 can move, that is, when the current state of the screen 201 is the bottom state, the screen 201 is at the lowest point.

As shown in the screen ascending graph of fig. 7, the ascending process of the screen is divided into a reset phase, an acceleration phase, a uniform velocity phase and a deceleration phase. The reset phase is a process that the screen rises from the absolute zero point of the screen to the reference zero point, and the rising speed of the screen in the reset phase is an acceleration process. The acceleration phase is a process that the screen rises from a reference zero point, and the rising speed rises from a lower value to a higher value. And when the rising speed of the screen is increased to a preset constant speed, entering a uniform speed stage. The screen continuously rises at the preset uniform speed and keeps rising at a uniform speed. When the height reaches the next highest point (the starting position of the deceleration stage), the ascending speed of the screen starts to be reduced, and the ascending process of the screen enters the deceleration stage until the screen ascends to the highest point.

Based on the screen rising curve shown in fig. 7, when the state of the screen is the bottom state, the screen is located at the lowest point where the screen can move (i.e. the absolute zero point of the screen in fig. 7); when the state of the screen is a zero state, the screen is located at a preset reference position of the screen (namely, a reference zero point in fig. 7); when the screen is in a state of ready to rise, the screen is located at a preset reference position of the screen; when the screen is in the rising state, the moving direction of the screen is from the lowest point to the highest point; when the state of the screen is the top state, the screen is located at the highest movable point (namely, the highest point in fig. 7) of the screen; when the state of the screen is a ready-to-descend state, the screen is positioned at the movable lowest point of the screen; when the screen is in a descending state, the moving direction of the screen is from the highest point to the lowest point; when the state of the screen is the state that the obstacle is detected, the screen pauses the ascending action or pauses the descending state.

In the present embodiment, only the case where the laser projection apparatus 202 is normally turned on and off is considered, that is, the screen 201 is always at the lowest point when the laser projection apparatus 202 is turned off, and the case where the laser projection apparatus 202 is not normally turned on and off is not considered (for example, the screen 201 has not yet fallen to the lowest point and the laser projection apparatus 202 is turned off). Namely, the screen is in the bottom state, the screen is in the absolute zero position, and the screen is in the zero state, the screen is in the reference zero position.

While the current state of the screen 201 is the bottom state, a power-on instruction input by a user is received. According to the state sequence relationship in the state switching mechanism, the next state of the bottom state is a zero-point state, which indicates that the bottom state is the first state, and the zero-point state is the second state, then the control screen 201 is switched from the bottom state to the zero-point state. At the same time, the control screen 201 moves from the bottom state corresponding position to the zero state corresponding position. And the corresponding position of the zero state is a preset reference position. That is, the control screen 201 moves from the lowest point to the reference point while the control screen 201 is switched from the bottom state to the zero point state. Thus, the screen 201 can be ensured to synchronously follow the rising while the laser projection device 202 is started.

In some embodiments, after the screen 201 is switched from the bottom state to the zero-point state, according to the state switching mechanism of fig. 6, the next state of the zero-point state is the ready-to-rise state, which means that the zero-point state is the first state, the ready-to-rise state is the second state, the screen 201 is controlled to further switch from the zero-point state to the ready-to-rise state, and a start-to-rise instruction is generated. After the rise command is generated, the rise command is temporarily stored in the storage element, and at this time, the screen 201 is not controlled to perform the corresponding operation according to the rise command. That is, when the screen 201 is in the ready-to-rise state, it is ready for rising. For example, in the ready-to-rise state, the boot video is ready, following the animation is ready. At this time, the controller 11 controls the screen 201 to be maintained at the preset reference position, that is, the screen 201 is maintained at the reference point position. In this way, the screen 201 can be directly brought into the rising preparation state from the zero point state, and the screen 201 is ensured to continue further moving actions, so as to ensure that the screen 201 synchronously follows the rising.

After the screen 201 is successfully switched to the ready-to-rise state, the screen 201 is ready to rise, and according to the state switching mechanism of fig. 6, the next state of the ready-to-rise state is the rise state, which means that the ready-to-rise state is the first state and the rise state is the second state, and the control screen 201 is further switched from the ready-to-rise state to the rise state. Meanwhile, according to the above-described ascending instruction saved in the storage element, the control screen 201 starts to ascend, and the control screen 201 keeps the ascending action until the screen 201 moves from the reference point to the top state corresponding position. Here, the top state corresponding position may be the highest position where the screen 201 is movable. In this way, the screen 201 can be directly brought into the ascending state from the ready-to-ascend state, the screen 201 is guaranteed to move upward, and the screen 201 is guaranteed to synchronously follow the ascending.

In some embodiments, during the ascent of the screen 201, if an obstacle is detected, according to the state switching mechanism of fig. 6, the ascent state is a first state, the obstacle detected state is a second state, the control screen 201 switches from the ascent state to the obstacle detected state, and the control screen 201 suspends the ascent action. Thus, during the ascent of the screen 201, the screen 201 may be directly controlled to pause the ascent if an obstacle is detected. And if it is detected that the obstacle is removed, according to the state switching mechanism of fig. 6, it is detected that the state of the obstacle is the first state, the ascending state is the second state, the control screen 201 is switched from the state in which the obstacle is detected to the ascending state, and the control screen 201 continues the ascending motion. In this way, the screen 201 may continue to rise directly after the obstacle is cleared.

In some embodiments, the obstacle detection may utilize a distance sensor, a photoelectric sensor, or other technical means, or may further include an image collector to collect an image, specifically, a camera, where the controller acquires a captured screen image from the camera to determine whether there is an obstacle obstructing movement of the screen. The images of one screen can be shot at preset time intervals, the images shot at the adjacent time before and after are compared, and whether the barrier exists or not is judged according to the comparison result.

The number of the cameras can be one or more, wherein the camera area of at least one camera is a screen lifting area, and the camera is used for shooting a screen and displaying pictures in the lifting process. When the quantity of camera was 2, two cameras were located the both sides of projection subassembly respectively. In some embodiments, the camera can rotate on a horizontal plane, and when a screen needs to be shot and an image photo needs to be displayed, the shooting lens is rotated to the direction of the screen; when the user picture needs to be taken, the shooting lens is rotated to the user.

Illustratively, two screen images a and b shown in fig. 8 are images taken at adjacent times. b is shot later than a, and the b image is shown with an increased amount of the hatched area of the dotted line region in fig. 8 with respect to the a image. It can be judged that there is an obstacle obstructing the movement of the screen at this time. In addition, an air blowing device can be arranged near the screen, so that light obstacles around the screen can be cleared. For example, the blowing device can easily remove paper scraps. The blowing device does not need to be set to be normally open, and can be turned on again when an obstacle is detected.

For example, the b-image now has the shading of the dashed area shown in fig. 8 for the a-image. The camera device sends the detected barrier signal to the controller, and the controller controls the blowing device to be started. And after the blowing device is started for a preset time, shooting the screen image b1. If the screen image b1 is shaded out relative to the screen image a, the dotted area indicates that the obstacle has been cleared, the mass may be light, and the screen movement will no longer be impeded. If the screen image b1 is not removed from the screen image a, the barrier material is heavy and not easy to be removed, and the screen movement is still hindered. As shown in fig. 9, if the position of the dotted area in the screen image b1 is shifted relative to the position of the dotted area in the screen image b, it can also indicate that the barrier material is light and no longer obstructs the screen movement. Whether barriers exist around the screen or not can be judged through the image shooting mode, and the accurate objects of the barriers can be obtained, so that a user can conveniently clear the barriers.

In some embodiments, when it is detected that an obstacle obstructing movement of the screen exists, the speaker may be further controlled to emit a voice prompt for removing the obstacle, so that the user can know that the obstacle exists around the screen, which may cause the screen to be unable to move normally, and thus the normal lifting of the screen can be ensured by removing the obstacle.

In some embodiments, as shown in fig. 6, in the state switching mechanism, if the current state of the screen 201 is the top state, the laser projection apparatus 202 is in the on state. In the same embodiment, only the normal on/off scenario is considered, that is, when the current state of the screen 201 is the top state, the laser projection apparatus 202 can only be in the on state, and the abnormal off condition is not considered (for example, when the current state of the screen 201 is the top state, the laser projection apparatus 202 is powered off, so that the screen 201 cannot descend).

While the current state of the screen 201 is the top state, a shutdown instruction input by the user is received. According to the state sequence relationship in the state switching mechanism, the next state of the top state is the ready-to-descend state, which means that the top state is the first state, and the ready-to-descend state is the second state, the control screen 201 is switched from the top state to the ready-to-descend state, and a start-to-descend instruction is generated. After the lowering command is generated, the lowering command is temporarily stored in the storage element, and at this time, the screen 201 is not controlled to perform the corresponding operation according to the lowering command. At this time, the controller 11 controls the screen 201 to be maintained at the preset reference position, that is, the screen 201 is maintained at the reference point position. In this way, the screen 201 can be directly entered into the descending preparation state from the top state, and the screen 201 is ensured to continue further moving actions, thereby ensuring that the screen 201 synchronously follows the descending.

After the screen 201 is successfully switched to the ready-to-descend state, indicating that the screen 201 is ready to descend, according to the state switching mechanism of fig. 6, the next state of the ready-to-descend state is the descend state, indicating that the ready-to-descend state is the first state, and the descend state is the second state, and the control screen 201 is further switched from the ready-to-descend state to the descend state. Meanwhile, according to the above-described lowering instruction stored in the storage element, the control screen 201 starts to be lowered, and the control screen 201 keeps the lowering action until the screen 201 goes from the highest position to the bottom state corresponding position. Here, the bottom state corresponding position may be the lowest position where the screen 201 can move. In this way, the screen 201 can be directly brought into the descending state from the ready-to-descend state, the screen 201 is guaranteed to move downwards, and the screen 201 is guaranteed to synchronously follow the descending.

In some embodiments, during the lowering of the screen 201, if an obstacle is detected, the lowering state is a first state, the obstacle state is detected as a second state, the control screen 201 switches from the lowering state to the obstacle detected state, and the control screen 201 pauses the lowering action according to the state switching mechanism of fig. 6. Thus, during the descent of the screen 201, the screen 201 may be directly controlled to pause the descent if an obstacle is detected. And if it is detected that the obstacle is removed, according to the state switching mechanism of fig. 5, it is detected that the state of the obstacle is the first state, the descending state is the second state, the control screen 201 is switched from the state in which the obstacle is detected to the descending state, and the control screen 201 continues the descending motion. In this way, the screen 201 may continue to descend directly after clearing the obstruction.

In the state switching mechanism of the above embodiment, the specific description of each state and the state transition-out condition in the lifting process can be shown in table 1:

TABLE 1 State Explanation and transfer-in-out conditions in the State switching mechanism

The MCU (Micro Controller Unit) in table 1 is also called a microcontroller.

The specific implementation process of the above embodiment may be as follows:

at power-on, the process shown in the state-switch signaling diagram shown in fig. 10. The method comprises the steps that when an Android system starts a home (application program), according to scene judgment, an activiymanagervice (service responsible for managing all activities in the system) starts the hisprelervice (background service). And after the hispalyservice is started, a state switching module is established during initialization. The state switching module initializes communication with the MCU, reads the state of the screen 201, and initializes the state to a BOTTOM state (BOTTOM state) when the device is powered on. And the hisplayservice sends a starting instruction, and the state switching module carries out subsequent state switching according to a state switching mechanism after receiving the starting instruction.

At shutdown, the procedure shown in the state-switch signaling diagram shown in fig. 11. And (3) the shutdown management service receives a shutdown key instruction and starts the hisplyservice background service. The hisplayservice creates a state initialization module at onstart (text start triggering event handler) lifecycle. The state switching module is in serial communication with the MCU, reads the state of the screen 201, and under the condition of normal shutdown, the state of the screen 201 is in a TOP state (TOP state). And the Hisplayserver sends a shutdown instruction, and the state switching module performs subsequent state switching according to a state switching mechanism after receiving the instruction.

When an obstacle is detected during the process of raising or lowering the screen 201, the process shown in the state switching signaling diagram shown in fig. 12 is performed. Obstacle detection thread: 1s polling reads GPIO (General Purpose Input Output, which is referred to as a pin of a chip in the embodiment of the present invention), then acquires the state of an obstacle, and notifies the read result to a lifting UI processing thread. UI processing thread: when an obstacle is detected in the ascending and descending processes, the pending state is entered (the obstacle state is detected), the MCU is informed to suspend the ascending and descending of the screen 201, and the following of the animation is stopped at the same time. After the barrier is removed, the pending state is removed, the MCU is notified to continue the movement of the screen 201, and the frame moves synchronously with the movement. And receiving the state information of the state machine and executing the related operation. A lifting state machine: the switching of the lifting and the suspension of the screen 201, which manages the lifting and the suspension of the screen 201, is to interact with the MCU through serial port communication and send corresponding instructions to control the lifting and the suspension of the screen 201.

In some embodiments, the controller may prompt the user of successful state switching through an indicator light or screen flash after successful state switching of the control screen. For example, when the screen is successfully switched from the bottom state to the zero point state while the screen moves from the lowest point to the reference point, the screen regularly blinks for a predetermined time. In practical applications, it may happen that the screen is not moved to the highest point or the lowest point, and the user mistakenly thinks that the screen has moved to the highest point or the lowest point. Namely, the user mistakenly thinks that the state switching is successful, so the user can be reminded through the successful state switching indication. For example, when the screen is raised, the screen does not rise to the highest point due to factors such as a fault, but the user cannot judge whether the screen rises to the highest point with naked eyes. Therefore, if the screen is set to be successfully switched from the ascending state to the top state, namely the screen successfully ascends to the highest point position, the screen regularly flickers. If the screen does not regularly flicker, the screen state switching is not successful, and therefore the situation that whether the state switching is successful or not cannot be judged is avoided.

In some embodiments, when the ascending state is switched to the top state, since it takes a certain time to move from the reference point position to the top highest point position, in order to avoid an abnormal condition in the middle caused by too long time, an intermediate state may be set during the ascending process. For example, a rising intermediate state is set between the rising state and the top state. And when the ascending state is successfully switched to the ascending middle state, switching from the ascending middle state to the top state. Similarly, when the descending state is switched to the bottom state, since it takes a certain time to move from the top highest point position to the bottom lowest point position, in order to avoid an intermediate abnormal condition caused by an excessively long time, an intermediate state may be set in the descending process. For example, a descending intermediate state is provided between the descending state and the bottom state. And when the top state is successfully switched to the descending middle state, switching from the descending middle state to the bottom state. Therefore, the ascending stage and the descending stage which are long in time are refined, and the abnormal condition of state switching in the stages is reduced.

In some embodiments, a custom state may also be set between the up state and the top state. For example, the user does not want to raise the screen to the highest point, i.e., to a position between the lowest point and the highest point. A custom key may be provided on the control device. Specifically, in the ascending process of the screen, a user inputs a custom instruction by pressing a custom button on the control device, the controller receives the custom instruction, the screen is controlled to be switched from the bottom state to the custom state according to the custom instruction, and meanwhile the screen is controlled to move from the lowest point position to the position corresponding to the custom state.

Here, the user-defined state corresponding position may be preset as one, or may be preset as a plurality. When the corresponding positions of the user-defined state are multiple, the controller can control the equipment to select the label of the user-defined position through voice prompt after receiving the self-defined instruction. For example, the user is prompted to select custom location 1 or custom location 2. Similarly, a custom state may be set between the down state and the bottom state. In the descending process of the screen, a user inputs a custom instruction by pressing a custom button on the control device, the controller receives the custom instruction, the screen is controlled to be switched from the top state to the custom state according to the custom instruction, and meanwhile the screen is controlled to move from the highest point position to the position corresponding to the custom state. Therefore, by utilizing the self-defined state, the user can control the screen to move to the position required to be used by the user through the control device.

Fig. 13 is a signaling schematic diagram of a method for switching a lifting state of a screen 201 of a laser projection device 202, which is applied to the laser projection device 202, where the laser projection device 202 includes a monitoring component configured to monitor a current state of the screen 201, the screen 201 is the lifting screen 201, the state of the screen 201 is a state preset in a state switching mechanism, the state switching mechanism is a preset mechanism, and the screen 201 switches the current state according to the state switching mechanism, where the method is applied to a controller 11 of the laser projection device 202, and specifically includes the following steps:

step one, acquiring the current state of a screen 201 from a monitoring component;

step two, when the current state of the screen 201 is the first state, the screen 201 is controlled to be switched from the first state to the second state. It should be noted that the first state and the second state are both states defined in the state switching mechanism. In the state switching mechanism, the second state is a state next to the first state.

And step three, controlling the screen 201 to execute the operation corresponding to the second state.

Thus, the controller can determine the relationship (in this embodiment, the sequential relationship) between the current state of the screen 201 and other states in the state switching mechanism by using a preset state switching mechanism according to the current state of the screen 201. The direct control screen 201 switches from the current state to the state indicated in the state switching mechanism. Further, according to the switched state, the control screen 201 executes the corresponding operation of the switched state. Therefore, when the laser projection equipment 202 is started and shut down, the screen 201 can be synchronously lifted and lowered, and the watching experience of a user is improved.

In some embodiments, during the screen lifting process of the laser television with the new form, the projected image cannot lift synchronously along with the screen. In order to solve the above problem, based on the architecture of the projection device in the foregoing embodiment, an embodiment of the present invention further provides a projection device, including: the projection assembly is configured to project an image to a screen, and the screen is a liftable screen; the monitoring component is configured to monitor the moving height of the screen during the screen moving process and feed back the moving height to the controller; a controller configured to: calculating the projection height according to the movement height by using a preset rule, wherein the preset rule specifies a mapping relation between the movement height and the projection height; and controlling the projection assembly to project an image with corresponding height to the screen according to the projection height. The preset rule may specifically be a corresponding table for setting the screen movement height and the projection height. For example, if the screen moving height is 10cm, the projection height is also 10cm, or a specific value is set according to the actual situation of the screen.

In some embodiments, if the state of the screen is the ascending state, the ascending height of the screen is obtained, and the ascending height is determined as the moving height, and the moving direction of the screen is from the lowest point to the highest point when the state of the screen is the ascending state; and calculating the percentage of the moving height in the complete height, wherein the complete height is the height of the screen from rising to the highest point, and when the screen rises to the highest point, the image projected to the screen by the projection assembly is a complete image. And controlling the projection component to project the image with the corresponding height to the screen according to the percentage. For example, as shown in the projection diagram of the ascending state shown in fig. 14 and the complete projection diagram shown in fig. 15, the current screen is in the ascending state, i.e. the moving direction is from the lowest point to the highest point. The rising height of the screen from the lowest point to the highest point is H, and the moving height of the screen is H at the moment. The full height is W. The percentage of the screen rise at this time is H/W. The image is projected onto the screen in the same percentage, i.e. the height of the projection area L = H/W Z, where Z is the height of the image when the projection assembly projects the complete image onto the screen.

In some embodiments, the projection module is controlled to pause projection of the image onto the screen when the state of the screen is the state in which the obstacle is detected, and the screen is controlled to pause movement when the state of the screen is the state in which the obstacle is detected.

In some embodiments, when the screen is in a descending state, the descending height of the screen is obtained, and a value obtained by subtracting the descending height from the complete height is determined as a moving height, the complete height is a height from the screen to the highest point, when the screen is raised to the highest point, an image projected to the screen by the projection assembly is a complete image, and when the screen is in the descending state, the moving direction of the screen is from the highest point to the lowest point; calculating a percentage of the mobile height to the full height; and controlling the projection component to project the image with the corresponding height to the screen according to the percentage.

For example, as shown in the projection diagram of the descending state shown in fig. 16, the current screen is in the descending state, i.e. the moving direction is from the highest point to the lowest point. The descending height of the screen from the highest point to the highest point is M, and the moving height of the screen is W-M at the moment. The percentage of the rise of the screen at this time is W-M/W. The image is projected to the screen in the same percentage, i.e. the height of the projection area L = W-M/W Z.

In some embodiments, the projected image may be a video animation implemented by TextureView (UI controls for displaying data streams) + MediaPlayer (media center software). The specific TextureView is used to control the picture height, and MediaPlayer is used to control the picture playback. The specific implementation mechanism of the screen-up embodiment is as follows:

when starting to rise, setting the Y-axis value of the TextureView (namely the height value of the rising animation) as the initial state, calling a starting interface of the MediaPlayer to start playing the video animation, and simultaneously informing the MCU to start the screen to rise through serial communication.

The screen is in a rising state (in the rising process), the monitoring component (a lifting state machine) is communicated with the MCU through the serial port, and the rising height percentage (namely the percentage of the moving height to the full height) of the screen is polled. The UI processing thread is then notified of the height percentage, and converts the height percentage into a Y-axis value of TextureView. And controlling the projection component to project video pictures of corresponding areas (namely pictures with corresponding Y-value heights) to the screen according to the Y-axis value of the TextureView. The following of the video animation and the screen is realized through the mechanism.

And if the obstacle thread detects the obstacle, entering a pause state (the obstacle state is detected) through the lifting state machine. And the lifting state machine informs the MCU of suspending screen lifting actions through serial port communication, and simultaneously informs a UI processing thread to process animation related logic. Specifically, after receiving the detected obstacle message, the UI processing thread calls a pause method to pause the playing of the video animation, and stops updating the Y-axis value of the TextureView.

And if the obstacle thread detects that the obstacle disappears, the lifting state machine is informed of the disappearance of the obstacle, and the lifting state machine is restored to the ascending state. And the lifting state machine informs the MCU to continuously raise the screen through serial port communication, and simultaneously informs the UI to process the thread and continuously process the animation related logic. And after receiving the message, the UI processing thread calls a Start method to continue playing the video animation. And the lifting state machine is communicated with the MCU through serial port communication, and continuously polls to obtain the lifting height percentage of the screen. And notifies the UI processing thread of the acquired screen rise percentage. The UI processing thread converts the rise height percentage into a Y-axis value of the TextureView, thereby continuously realizing synchronous following of the video animation and the screen rise and fall by adjusting the Y-axis value of the TextureView.

Fig. 17 is a signaling diagram of an image following method when a screen of a projection device is lifted, where the image following method is applied to a projection device, where the projection device includes a projection component configured to project an image onto the screen, and the screen is a liftable screen; the monitoring component is configured to monitor the moving height of the screen in the screen moving process and feed back the moving height to the controller, and the monitoring component specifically comprises the following steps:

and step two, controlling the projection assembly to project an image with a corresponding height to the screen according to the projection height.

Those skilled in the art will appreciate that aspects of the present application may be illustrated and described in terms of several patentable species or situations, including any new and useful combination of processes, machines, manufacture, or materials, or any new and useful improvement thereof. Accordingly, various aspects of the present application may be embodied entirely in hardware, entirely in software (including firmware, resident software, micro-code, etc.) or in a combination of hardware and software. The above hardware or software may be referred to as "data block," controller, "" engine, "" unit, "" component, "or" system. Furthermore, aspects of the present application may be represented as a computer product, including computer readable program code, embodied in one or more computer readable media.

Additionally, the order in which elements and sequences of the processes described herein are processed, the use of alphanumeric characters, or the use of other designations, is not intended to limit the order of the processes and methods described herein, unless explicitly claimed. While certain presently contemplated useful embodiments of the invention have been discussed in the foregoing disclosure by way of various examples, it is to be understood that such detail is solely for that purpose and that the appended claims are not limited to the disclosed embodiments, but, on the contrary, are intended to cover all modifications and equivalent arrangements that are within the spirit and scope of the embodiments of the disclosure. For example, although the system components described above may be implemented by hardware devices, they may also be implemented by software-only solutions, such as installing the described system on an existing server or mobile device.

Similarly, it should be noted that in the preceding description of embodiments of the application, various features are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure aiding in the understanding of one or more of the embodiments. This method of disclosure, however, is not intended to imply that more features are required than are expressly recited in the claims. Indeed, the embodiments may be characterized as having less than all of the features of a single embodiment disclosed above.

Claims

1. A projection device, comprising:

a controller configured to:

2. The projection device of claim 1, wherein the controller is specifically configured to:

when the screen is in the rising state, acquiring the rising height of the screen, and determining the rising height as the moving height, wherein when the screen is in the rising state, the moving direction of the screen is from the lowest point to the highest point;

calculating the percentage of the moving height in the complete height, wherein the complete height is the height of the screen from rising to the highest point, and when the screen rises to the highest point, the image projected to the screen by the projection assembly is a complete image;

and controlling the projection component to project the image with the corresponding height to the screen according to the percentage.

3. The projection device of claim 1, wherein the controller is specifically configured to:

and when the state of the screen is the state that the obstacle is detected, controlling the projection assembly to pause projecting the image to the screen, and when the state of the screen is the state that the obstacle is detected, pausing the movement of the screen.

4. The projection device of claim 1, wherein the controller is specifically configured to:

when the screen is in a descending state, acquiring a descending height of the screen, and determining a value obtained by subtracting the descending height from a complete height as the moving height, wherein the complete height is a height from the screen to the highest point, when the screen is lifted to the highest point, an image projected to the screen by the projection assembly is a complete image, and when the screen is in the descending state, a moving direction of the screen is from the highest point to the lowest point;

calculating a percentage of the mobile height to the full height;

and controlling the projection assembly to project the image with the corresponding height to the screen according to the percentage.

5. The projection device of claim 1, wherein the monitoring component is further configured to monitor a state of the screen, the state of the screen including a first state and a second state preset according to a state switching mechanism, the controller being further configured to:

acquiring the current state of the screen;

when the current state of the screen is a first state, controlling the screen to switch from the first state to a second state, and controlling the screen to execute the corresponding operation of the second state, wherein in the state switching mechanism, the second state is a next state of the first state.

6. The projection device of claim 5, wherein the controller is further configured to:

receiving a starting-up instruction input by a user;

responding to the starting instruction, when the first state is a bottom state, the second state is a zero state, and controlling the screen to move from the position corresponding to the bottom state to the position corresponding to the zero state, when the state of the screen is the bottom state, the screen is located at the lowest movable point position of the screen, and when the state of the screen is the zero state, the screen is located at a preset reference position;

and when the first state is a zero state, the second state is a ready-to-rise state, the states are switched, meanwhile, a start-to-rise instruction is generated, meanwhile, the screen is controlled to be kept at the preset reference position, and when the state of the screen is the ready-to-rise state, the screen is located at the preset reference position.

7. The projection device of claim 6, wherein the controller is further configured to:

and when the first state is a ready-to-rise state, the second state is a rise state, and the switching state controls the screen to start rising and keep rising according to the rising starting instruction until the screen moves to a position corresponding to the top state, wherein when the screen state is the rise state, the moving direction of the screen is from the lowest point to the highest point, and when the screen state is the top state, the screen is located at the position of the highest point where the screen can move.

8. The projection device of claim 5, wherein the controller is further configured to:

receiving a shutdown instruction input by a user;

responding to the shutdown instruction, when the first state is the top state, the second state is the ready-to-descend state, switching the states, generating a descent starting instruction, and controlling the screen to be kept at the position corresponding to the top state, wherein when the states of the screen are the top state and the ready-to-descend state, the screen is located at the movable highest point of the screen.

9. The projection device of claim 8, wherein the controller is further configured to:

and when the first state is a ready-to-descend state, the second state is a descending state, the states are switched, and meanwhile, according to the descending starting instruction, the screen is controlled to start descending and keep descending action until the screen moves to a position corresponding to a bottom part state, and when the state of the screen is the bottom state, the screen is located at the lowest movable point position of the screen.

10. The image following method is characterized in that the projection equipment comprises a projection component, a control component and a display component, wherein the projection component is configured to project an image to a screen, and the screen is a liftable screen; a monitoring component configured to monitor a moving height of the screen during the screen movement and to feed back the moving height to a controller, the method comprising: