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Laser projection device and its startup method and shutdown method

A technology of laser projection and equipment, which is applied in optics, instruments, projection devices, etc., can solve problems such as high switching efficiency and low switching noise, and achieve the effects of improving shutdown efficiency, reducing noise, and high shutdown efficiency

Active Publication Date: 2021-11-16
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 device and its startup method and shutdown method
  • Laser projection device and its startup method and shutdown method
  • Laser projection device and its startup method and shutdown method

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Embodiment Construction

[0041] In order to make the purpose, technical solution and advantages of the present application clearer, the implementation manners of the present application will be further described in detail below in conjunction with the accompanying drawings.

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

[0043] figure 2 It is a flow chart of a method for starting up a laser proje...

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PUM

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Abstract

The application discloses a laser projection device and its startup method and shutdown method, belonging to the field of laser projection display. During the start-up process of the laser projection device, the diffusion wheel drive circuit can slowly start the motor based on the first pulse width modulation signal with a small duty ratio, so that the main control circuit can reduce the supply of the first pulse width modulation signal with a large duty ratio to the diffusion wheel drive circuit. The second is the duration of starting the pulse width modulation signal, so that both higher starting efficiency and lower starting noise can be taken into account. During the shutdown process, by increasing the deceleration stage, the speed of the motor can be reduced to a relatively low speed quickly, and then slide freely from the low speed to a static state, so that both high shutdown efficiency and low shutdown noise can be taken into account .

Description

technical field [0001] The present application relates to the field of laser projection display, 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 laser beams, the lighting system is used to modulate the laser beams into image beams, and the lens system is used to project the image beams onto the projection screen. Wherein, 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 of 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 a...

Claims

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Application Information

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Patent Type & Authority Patents(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