CN110908233A - Control system and method for integrated cabinet of ultra-short-focus projector - Google Patents
Control system and method for integrated cabinet of ultra-short-focus projector Download PDFInfo
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- CN110908233A CN110908233A CN201911241064.XA CN201911241064A CN110908233A CN 110908233 A CN110908233 A CN 110908233A CN 201911241064 A CN201911241064 A CN 201911241064A CN 110908233 A CN110908233 A CN 110908233A
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- projection screen
- projector
- lifting
- receiving
- control module
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/54—Accessories
- G03B21/56—Projection screens
- G03B21/58—Projection screens collapsible, e.g. foldable; of variable area
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon Stands for scientific apparatus such as gravitational force meters
- F16M11/20—Undercarriages with or without wheels
- F16M11/24—Undercarriages with or without wheels changeable in height or length of legs, also for transport only, e.g. by means of tubes screwed into each other
- F16M11/26—Undercarriages with or without wheels changeable in height or length of legs, also for transport only, e.g. by means of tubes screwed into each other by telescoping, with or without folding
Abstract
The invention relates to the field of projectors, aims to solve the problem that an existing ultra-short-focus projector is easily clamped by foreign matters during automatic lifting, and provides a control system for an integrated cabinet of the ultra-short-focus projector, which comprises: the projector is fixedly connected with the projector telescopic device, the projection screen is fixedly connected with the projection screen lifting device, the control module is respectively connected with the projector telescopic device, the projection screen lifting device and the projection screen anti-clamping device, and the projection screen anti-clamping device is connected with the projection screen lifting device. The projection screen anti-pinch device is arranged in the projection screen lifting device, and detects whether the lifting of the projection screen is blocked or not in the automatic lifting process of the projector, if so, the projection screen is controlled to stop automatically lifting, so that the phenomenon that the lifting device is damaged due to the fact that the projection screen is blocked is avoided, and the stability and the safety of the projection system are improved.
Description
Technical Field
The invention relates to the field of projectors, in particular to a control system and a control method for an integrated cabinet of an ultra-short-focus projector.
Background
Ultra-short-focus projectors have a very short throw ratio, i.e., the ratio of the distance between the projector and the screen to the screen size. The ultra-short focus projector can project pictures on a large screen from a position a few inches away from the surface of the screen. The situation that the projector moves to block the picture on the screen does not exist, and the ultra-short-focus projector can be used for watching bright and colorful large-screen images in any room, classroom and conference room.
At present, most ultrashort burnt projectors are basically placed on a common television cabinet, a configured projection screen is hung on a television wall, the positions of the projector and the projection screen cannot be moved at will, otherwise, the projected image can be deviated on the projection screen, in order to hide the projection screen when the projector is not used, the ultrashort burnt projectors are placed in an integrated cabinet in the prior art, when the projector is not used, the projector and the projection screen are hidden, when the projector is used, the projector and the projection screen automatically extend out, but because the projection screen is in the process of automatically extending out, the projection screen is easily clamped due to foreign matters in a groove body extending out of the projection screen, the lifting system is damaged, and the normal use of the projector is influenced.
Disclosure of Invention
The invention aims to solve the problem that a projection screen of an existing ultra-short-focus projector is easily clamped by foreign matters when being lifted automatically, and provides a control system and a control method for an integrated cabinet of the ultra-short-focus projector.
The technical scheme adopted by the invention for solving the technical problems is as follows: a control system for an ultra-short-focus projector integrated cabinet, comprising: the projector is fixedly connected with the projector telescopic device, the projection screen is fixedly connected with the projection screen lifting device, the control module is respectively connected with the projector telescopic device, the projection screen lifting device and the projection screen anti-clamping device, and the projection screen anti-clamping device is connected with the projection screen lifting device;
the anti-pinch device of the projection screen is used for detecting whether the projection screen is blocked or not in the lifting process and sending a detection signal to the control module;
the control module is used for sending a starting instruction or a shutdown instruction to the projector telescopic device and/or the projection screen lifting device; receiving a detection signal, obtaining a detection result according to the detection signal, and judging whether to send a lifting stop control signal according to the detection result;
the projector telescopic device is used for driving the projector to extend out after receiving the starting instruction and driving the projector to retract after receiving the shutdown instruction;
the projection screen lifting device is used for driving the projection screen to lift up after receiving a starting command and driving the projection screen to descend after receiving a shutdown command; and in the process of driving the projection screen to lift, receiving a lifting stopping control signal sent by the control module, and stopping lifting according to the lifting stopping control signal.
Furthermore, in order to realize anti-pinch detection on the projection screen, the anti-pinch device of the projection screen comprises a first current detection unit;
the first current detection unit is used for detecting the current of a motor of the projection screen lifting device in the lifting process of the projection screen, and if the current is larger than a preset value, the projection screen is judged to be blocked.
Further, in order to solve the problem that the projector of the ultra-short-focus projector is easily clamped by foreign objects when automatically stretching, the projector further comprises: the projector anti-pinch device is respectively connected with the projector telescopic device and the control module;
the projector anti-pinch device is used for detecting whether the projector receives a barrier in the stretching process and sending a detection signal to the control module;
the control module is also used for obtaining a detection result according to the detection signal and judging whether to send a telescopic control stopping signal according to the detection result;
the projection screen telescopic device is also used for receiving a telescopic stopping control signal sent by the control module in the process of driving the projector to stretch and retract, and stretching and retracting are stopped according to the telescopic stopping control signal.
Furthermore, in order to realize anti-pinch detection of the projector, the anti-pinch device of the projection screen comprises a second current detection unit;
and the second current detection unit is used for detecting the current of a motor of the projector telescopic device in the telescopic process of the projector, and if the current is greater than a preset value, the projector is judged to be blocked.
Further, in order to realize the acquisition of images, the system also comprises a camera and a camera lifting device, wherein the camera is arranged on the camera lifting device, the camera lifting device is connected with the control module, and the camera is connected with the projector;
the control module is also used for sending a starting instruction or a shutdown instruction to the camera lifting device;
the camera lifting device is used for driving the camera to lift out after receiving the starting instruction and driving the camera to descend after receiving the shutdown instruction.
Furthermore, the alarm device also comprises an alarm module for alarming after the projection screen is clamped, and the alarm module is connected with the control module;
the control module is used for sending an alarm signal to the alarm module after judging that the projection screen is blocked in the lifting process;
and the alarm module is used for sending out an alarm after receiving the alarm signal.
Furthermore, the system is convenient for a user to carry out on-off operation, and further comprises a key module, wherein the key module is connected with the control module;
and the key module is used for controlling the control module to send a starting instruction or a shutdown instruction to the projector telescopic device and/or the projection screen lifting device.
On the other hand, the invention also provides a control method for the integrated cabinet of the ultra-short-focus projector, which comprises the following steps:
the control module sends a starting instruction or a shutdown instruction to the projector telescopic device and/or the projection screen lifting device;
the projector telescopic device drives the projector to extend out after receiving the starting instruction, and drives the projector to retract after receiving the shutdown instruction;
the projection screen lifting device drives the projection screen to rise after receiving the starting command, drives the projection screen to fall after receiving the shutdown command, detects whether the projection screen is blocked in the lifting process, and stops lifting if the projection screen is blocked.
Further, the detecting whether the projection screen is blocked during the lifting process comprises:
detecting the current of a motor of the projection screen lifting device in the lifting process of the projection screen, and if the current is larger than a preset value, judging that the projection screen is blocked.
Further, the method also comprises the following steps:
the control module sends a starting instruction or a shutdown instruction to the camera lifting device;
the camera lifting device drives the camera to lift out after receiving the starting-up instruction, and drives the camera to descend after receiving the shutdown instruction.
The invention has the beneficial effects that: according to the control system and method for the integrated cabinet of the ultra-short-focus projector, the projection screen anti-pinch device is arranged in the projection screen lifting device, the projection screen anti-pinch device detects whether the lifting of the projection screen is blocked or not in the automatic lifting process of the projection screen, if so, the projection screen is controlled to stop automatically lifting, and the user checks the fault and then lifts again; in addition, at the automatic flexible in-process of projector, whether the flexible of projector detection anti-pinch device receives and blocks, if yes, then control projector stop automatic flexible, avoided the flexible card of projector to die the damage telescoping device, improved projection system's stability and security.
Drawings
Fig. 1 is a schematic structural diagram of a control system for an integrated cabinet of an ultra-short-focus projector according to an embodiment of the present invention;
fig. 2 is a schematic flowchart of a control method for an integrated cabinet of an ultra-short-focus projector according to an embodiment of the present invention.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
The invention discloses a control system for an integrated cabinet of an ultra-short-focus projector, which comprises: the projector is fixedly connected with the projector telescopic device, the projection screen is fixedly connected with the projection screen lifting device, the control module is respectively connected with the projector telescopic device, the projection screen lifting device and the projection screen anti-clamping device, and the projection screen anti-clamping device is connected with the projection screen lifting device; the anti-pinch device of the projection screen is used for detecting whether the projection screen is blocked or not in the lifting process and sending a detection signal to the control module; the control module is used for sending a starting instruction or a shutdown instruction to the projector telescopic device and/or the projection screen lifting device; receiving a detection signal, obtaining a detection result according to the detection signal, and judging whether to send a lifting stop control signal according to the detection result; the projector telescopic device is used for driving the projector to extend out after receiving the starting instruction and driving the projector to retract after receiving the shutdown instruction; the projection screen lifting device is used for driving the projection screen to lift up after receiving a starting command and driving the projection screen to descend after receiving a shutdown command; and in the process of driving the projection screen to lift, receiving a lifting stopping control signal sent by the control module, and stopping lifting according to the lifting stopping control signal.
The device modules are all arranged in the integrated cabinet, when a user sends a starting instruction through the control module, the projector telescopic device drives the projector to extend out of the integrated cabinet, the projection screen lifting device drives the projection screen to lift out, the projection screen anti-clamping device detects whether the projection screen is blocked or not in the lifting process of the projection screen, and if yes, the projection screen lifting device is controlled to stop driving the projection screen to lift out; when a user sends a shutdown instruction through the control module, the projector telescopic device drives the projector to retract from the integrated cabinet, the projection screen lifting device drives the projection screen to descend, the projection screen anti-clamping device detects whether the projection screen is blocked or not in the descending process of the projection screen, and if yes, the projection screen lifting device is controlled to stop driving the projection screen to descend.
Examples
The control system for an integrated cabinet of an ultra-short-focus projector according to an embodiment of the present invention, as shown in fig. 1, includes: the projector is fixedly connected with the projector telescopic device, the projection screen is fixedly connected with the projection screen lifting device, the control module is respectively connected with the projector telescopic device, the projection screen lifting device and the projection screen anti-clamping device, and the projection screen anti-clamping device is connected with the projection screen lifting device;
the anti-pinch device of the projection screen is used for detecting whether the projection screen is blocked or not in the lifting process and sending a detection signal to the control module;
the control module is used for sending a starting instruction or a shutdown instruction to the projector telescopic device and/or the projection screen lifting device; receiving a detection signal, obtaining a detection result according to the detection signal, and judging whether to send a lifting stop control signal according to the detection result;
the projector telescopic device is used for driving the projector to extend out after receiving the starting instruction and driving the projector to retract after receiving the shutdown instruction;
the projection screen lifting device is used for driving the projection screen to lift up after receiving a starting command and driving the projection screen to descend after receiving a shutdown command; and in the process of driving the projection screen to lift, receiving a lifting stopping control signal sent by the control module, and stopping lifting according to the lifting stopping control signal.
The power supply of each module can be exchanged through AC 220V, DC12V is generated through an AC/DC voltage reduction conversion circuit, DC12V provides working power for a projector expansion device, a projection screen lifting device and a projection screen anti-pinch device in the system, DC12V generates DC 3.3V through DC/DC, and DC 3.3V provides working power for the control module.
The control module can be an MCU, a singlechip, a central processing unit or other processors with processing and operation functions. The control module comprises a serial port debugging interface and a writing interface, and the serial port debugging interface and the writing interface can write a control program to the control module.
The projector telescopic device comprises a projector telescopic control circuit, a motor, a limit switch and a tray, wherein the projector telescopic control circuit is used for receiving a control signal of the control module and then controlling the rotation of the motor, the motor rotates forward and backward to control the tray to move forward and backward, the limit switch controls the telescopic displacement of the motor, the projector is placed on the tray, and the tray moves forward and backward to drive the projector to stretch.
The projection screen lifting device comprises a projection screen lifting control circuit, a motor, a limit switch and a lifting support, wherein the projection screen lifting control circuit is used for controlling the rotation of the motor after receiving a control signal of the control module, the motor rotates forwards and backwards to control the lifting support to lift, the limit switch controls the lifting displacement of the motor, the projection screen is arranged on the lifting support, and the lifting of the projection screen is driven by the lifting support.
The anti-pinch device of the projection screen can be a current detection unit or an infrared sensor, the current detection unit can detect the current of a motor of the lifting device of the projection screen, when the current is larger than a preset value, the projection screen is indicated to be blocked in the lifting process, and the infrared sensor can detect whether foreign matters exist in a lifting groove of the projection screen.
The device modules are all arranged in the integrated cabinet, when a user sends a starting instruction through the control module, the projector telescopic device drives the projector to extend out of the integrated cabinet, the projection screen lifting device drives the projection screen to lift out, the projection screen anti-clamping device detects whether the projection screen is blocked or not in the lifting process of the projection screen, and if yes, the projection screen lifting device is controlled to stop driving the projection screen to lift out; when a user sends a shutdown instruction through the control module, the projector telescopic device drives the projector to retract from the integrated cabinet, the projection screen lifting device drives the projection screen to descend, the projection screen anti-clamping device detects whether the projection screen is blocked or not in the descending process of the projection screen, and if yes, the projection screen lifting device is controlled to stop driving the projection screen to descend.
In the lifting process of the projection screen, if the projection screen is detected to be blocked, the projection screen lifting device is controlled to stop driving the projection screen to lift, the projection screen anti-clamping device continuously detects whether the projection screen receives the blocking, and if the projection screen is detected to be unblocked subsequently, a lifting starting control signal is sent to the projection screen lifting device, so that the projection screen can be lifted normally; or after the preset time for stopping lifting, the lifting device of the projection screen is started again to drive the projection screen to lift.
Optionally, this embodiment further includes: the projector anti-pinch device is respectively connected with the projector telescopic device and the control module;
the projector anti-pinch device is used for detecting whether the projector receives a barrier in the stretching process and sending a detection signal to the control module;
the control module is also used for obtaining a detection result according to the detection signal and judging whether to send a telescopic control stopping signal according to the detection result;
the projection screen telescopic device is also used for receiving a telescopic stopping control signal sent by the control module in the process of driving the projector to stretch and retract, and stretching and retracting are stopped according to the telescopic stopping control signal.
The projector anti-pinch device can be a current detection unit or an infrared sensor, the current detection unit can detect the current of a motor of the projector telescopic device, when the current is larger than a preset value, the fact that the projector is blocked in the telescopic process is indicated, and the infrared sensor can detect whether foreign matters exist in a projector lifting groove.
When a user sends a starting instruction through the control module, the projector expansion device drives the projector to extend out of the integrated cabinet, the projection screen lifting device drives the projection screen to lift out, the projector clamping-proof device detects whether the projector is blocked or not in the process of extending out of the projector, and if yes, the projector expansion device is controlled to stop driving the projector to extend out; when a user sends a shutdown instruction through the control module, the projector telescopic device drives the projector to retract into the integrated cabinet, the projector clamping prevention device detects whether the projector is blocked or not in the retraction process of the projector, and if so, the projector telescopic device is controlled to stop driving the projector to retract.
In the process of stretching the projector, if the projector is detected to be blocked, controlling the projector stretching device to stop driving the projector to stretch, and then continuously detecting whether the projector receives the blockage by the projector anti-clamping device; or after the preset time for the telescopic device of the projector to stop stretching, the telescopic device of the projector is started again to drive the projector to stretch.
In this embodiment, the projector may further include a camera and a camera lifting device, the camera is disposed on the camera lifting device, the camera lifting device is connected with the control module, and the camera is connected with the projector; the control module is also used for sending a starting instruction or a shutdown instruction to the camera lifting device; the camera lifting device is used for driving the camera to lift out after receiving the starting instruction and driving the camera to descend after receiving the shutdown instruction. The camera is used for the projector to obtain the user image, and interaction with the user is realized.
Optionally, the system further comprises an alarm module, wherein the alarm module is connected with the control module; the control module is used for sending an alarm signal to the alarm module after judging that the projection screen is blocked in the lifting process; and the alarm module is used for sending out an alarm after receiving the alarm signal.
Particularly, receive when detecting the projection screen and block the back at the lift in-process, send out the police dispatch newspaper to the user through alarm module, the user of being convenient for in time knows and excludes the projection screen and blocks the condition, wherein, alarm module can be audible alarm or light alarm, like bee calling organ or LED pilot lamp.
Optionally, the present embodiment further includes a key module, where the key module is connected to the control module; and the key module is used for controlling the control module to send a starting instruction or a shutdown instruction to the projector telescopic device and/or the projection screen lifting device.
Specifically, a user can control the control module to send a startup instruction or a shutdown instruction through the key module, the key module comprises a plurality of touch keys, the control module can be controlled to simultaneously send startup and shutdown instructions to the projector telescopic device, the projection screen lifting device and the camera lifting device, and the control module can be independently controlled to send startup and shutdown instructions to one or more of the projector telescopic device, the projection screen lifting device and the camera lifting device.
Based on the above technical solution, an embodiment of the present invention further provides a control method for an integrated cabinet of an ultra-short-focus projector, including the following steps:
s1, a control module sends a starting instruction or a shutdown instruction to a projector telescopic device and/or a projection screen lifting device;
s2, after receiving a starting instruction, the projector telescopic device drives the projector to extend out, and after receiving a shutdown instruction, the projector is driven to retract;
and S3, after receiving the starting command, the projection screen lifting device drives the projection screen to lift, and after receiving the shutdown command, the projection screen is driven to descend, whether the projection screen is blocked in the lifting process is detected, and if yes, the lifting is stopped.
It can be understood that, since the control method for the ultra-short-focus projector integrated cabinet according to the embodiment of the present invention is a method implemented based on the control system for the ultra-short-focus projector integrated cabinet, for the method disclosed in the embodiment, since the method corresponds to the system disclosed in the embodiment, the description is simpler, and for relevant points, reference may be made to partial description of the system.
Claims (10)
1. A control system for integrative rack of ultrashort burnt projector, its characterized in that includes: the projector is fixedly connected with the projector telescopic device, the projection screen is fixedly connected with the projection screen lifting device, the control module is respectively connected with the projector telescopic device, the projection screen lifting device and the projection screen anti-clamping device, and the projection screen anti-clamping device is connected with the projection screen lifting device;
the anti-pinch device of the projection screen is used for detecting whether the projection screen is blocked or not in the lifting process and sending a detection signal to the control module;
the control module is used for sending a starting instruction or a shutdown instruction to the projector telescopic device and/or the projection screen lifting device; receiving a detection signal, obtaining a detection result according to the detection signal, and judging whether to send a lifting stop control signal according to the detection result;
the projector telescopic device is used for driving the projector to extend out after receiving the starting instruction and driving the projector to retract after receiving the shutdown instruction;
the projection screen lifting device is used for driving the projection screen to lift up after receiving a starting command and driving the projection screen to descend after receiving a shutdown command; and in the process of driving the projection screen to lift, receiving a lifting stopping control signal sent by the control module, and stopping lifting according to the lifting stopping control signal.
2. The control system for an integrated cabinet of ultra short-focus projector as set forth in claim 1, wherein the projection screen anti-pinch device comprises a first current detecting unit;
the first current detection unit is used for detecting the current of a motor of the projection screen lifting device in the lifting process of the projection screen, and if the current is larger than a preset value, the projection screen is judged to be blocked.
3. The control system for an ultra short-focus projector unified cabinet as claimed in claim 1, further comprising: the projector anti-pinch device is respectively connected with the projector telescopic device and the control module;
the projector anti-pinch device is used for detecting whether the projector receives a barrier in the stretching process and sending a detection signal to the control module;
the control module is also used for obtaining a detection result according to the detection signal and judging whether to send a telescopic control stopping signal according to the detection result;
the projector telescopic device is also used for receiving a telescopic stopping control signal sent by the control module in the process of driving the projector to stretch and retract, and stretching and retracting are stopped according to the telescopic stopping control signal.
4. The control system for an integrated cabinet of ultra short-focus projector as set forth in claim 3, wherein the projection screen anti-pinch device comprises a second current detecting unit;
and the second current detection unit is used for detecting the current of a motor of the projector telescopic device in the telescopic process of the projector, and if the current is greater than a preset value, the projector is judged to be blocked.
5. The control system for an ultra short focus projector integrated cabinet as claimed in claim, further comprising a camera and a camera lifting device, wherein the camera is disposed on the camera lifting device, the camera lifting device is connected to the control module, the camera is connected to the projector;
the control module is also used for sending a starting instruction or a shutdown instruction to the camera lifting device;
the camera lifting device is used for driving the camera to lift out after receiving the starting instruction and driving the camera to descend after receiving the shutdown instruction.
6. The control system for an ultra short-focus projector integrated cabinet as claimed in claim 1, further comprising an alarm module, wherein the alarm module is connected to the control module;
the control module is used for sending an alarm signal to the alarm module after judging that the projection screen is blocked in the lifting process;
and the alarm module is used for sending out an alarm after receiving the alarm signal.
7. The control system for an ultra short-focus projector integrated cabinet as claimed in claim 1, further comprising a key module, wherein the key module is connected to the control module;
and the key module is used for controlling the control module to send a starting instruction or a shutdown instruction to the projector telescopic device and/or the projection screen lifting device.
8. The control method for the integrated cabinet of the ultra-short-focus projector is characterized by comprising the following steps of:
the control module sends a starting instruction or a shutdown instruction to the projector telescopic device and/or the projection screen lifting device;
the projector telescopic device drives the projector to extend out after receiving the starting instruction, and drives the projector to retract after receiving the shutdown instruction;
the projection screen lifting device drives the projection screen to rise after receiving the starting command, drives the projection screen to fall after receiving the shutdown command, detects whether the projection screen is blocked in the lifting process, and stops lifting if the projection screen is blocked.
9. The control method for an integrated cabinet of ultra short-focus projector as set forth in claim 8, wherein the detecting whether the projection screen is blocked during the lifting comprises:
detecting the current of a motor of the projection screen lifting device in the lifting process of the projection screen, and if the current is larger than a preset value, judging that the projection screen is blocked.
10. The control method for an ultra short-focus projector all-in-one cabinet as claimed in claim 8, further comprising:
the control module sends a starting instruction or a shutdown instruction to the camera lifting device;
the camera lifting device drives the camera to lift out after receiving the starting-up instruction, and drives the camera to descend after receiving the shutdown instruction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201911241064.XA CN110908233A (en) | 2019-12-06 | 2019-12-06 | Control system and method for integrated cabinet of ultra-short-focus projector |
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| CN201911241064.XA CN110908233A (en) | 2019-12-06 | 2019-12-06 | Control system and method for integrated cabinet of ultra-short-focus projector |
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| WO2021249482A1 (en) * | 2020-06-11 | 2021-12-16 | 青岛海信激光显示股份有限公司 | Projection apparatus |
| CN114125518A (en) * | 2020-06-29 | 2022-03-01 | 海信视像科技股份有限公司 | Display device |
| WO2022227964A1 (en) * | 2021-04-25 | 2022-11-03 | 青岛海信激光显示股份有限公司 | Method for controlling laser television, main control apparatus, and laser television |
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Application publication date: 20200324 |