Laser projection equipment and startup method and shutdown method thereof

A technology of laser projection and equipment, applied in optics, instruments, projection devices, etc., can solve the problem of inability to take into account high switching efficiency and low switching noise.

Active Publication Date: 2020-06-19
QINGDAO HISENSE LASER DISPLAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] This application provides a laser projection device and its startup method and shutdown method, which can solve the problem that the solutions in the related art cannot take into account high switching efficiency and low switching noise

Method used

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  • Laser projection equipment and startup method and shutdown method thereof
  • Laser projection equipment and startup method and shutdown method thereof
  • Laser projection equipment and startup method and shutdown method thereof

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Embodiment Construction

[0041] In order to make the objectives, technical solutions, and advantages of the present application clearer, the following will further describe the embodiments of the present application in detail with reference to the accompanying drawings.

[0042] The embodiment of the application provides a laser projection device, such as figure 1 As shown, the device may include: a laser light source 10, a diffuser wheel 20, a main control circuit 30, a diffuser wheel drive circuit 40, and a switch circuit 50. Wherein, the diffuser wheel 20 may include a motor 201 and a diffuser 202 connected to the motor 201. The main control circuit 30 is respectively connected to the diffuser drive circuit 40 and the switch circuit 50, the diffuser drive circuit 40 is connected to the motor 201, and the switch circuit 50 is also connected to the laser light source 10.

[0043] figure 2 It is a flowchart of a method for starting up a laser projection device provided by an embodiment of the present appl...

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PUM

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Abstract

The invention discloses laser projection equipment and a startup method and a shutdown method thereof, and belongs to the field of laser projection display. In the start process of the laser projection device, a diffusion wheel driving circuit can slowly start the motor based on the first starting pulse width modulation signal with the small duty ratio, so that the duration of providing the secondstarting pulse width modulation signal with the large duty ratio to the diffusion wheel driving circuit by the main control circuit can be shortened, and the higher starting efficiency and the lowerstarting noise can be considered. In the shutdown process, the rotating speed of the motor can be quickly reduced to a relatively low rotating speed by adding a speed reduction stage, and then the motor freely slides to a static state from the relatively low rotating speed, so that high shutdown efficiency and low shutdown noise can be both considered.

Description

Technical field [0001] This application relates to the field of laser projection display, and in particular to a laser projection device and its startup method and shutdown method. Background technique [0002] Laser projection equipment generally includes a light source system, an illumination system and a lens system. The light source system is used to provide a laser beam, the illumination system is used to modulate the laser beam into an image beam, and the lens system is used to project the image beam onto the projection screen. Among them, the light source system includes a laser light source and a diffusion wheel, and the diffusion wheel can diffuse the laser light emitted by the laser light source. [0003] In the related art, the light source system also includes a main control circuit and a driving circuit for the diffusion wheel. The main control circuit provides a driving signal to the driving circuit, and the driving circuit can drive the diffusion wheel to rotate at...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/00G03B21/20G03B21/16G03B21/00
CPCG03B21/008G03B21/16G03B21/208G09G3/001G09G2330/026G09G2330/027
Inventor 陈许肖纪臣
Owner QINGDAO HISENSE LASER DISPLAY CO LTD
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