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laser projection equipment

A technology of laser projection and equipment, which is applied in optics, instruments, projection devices, etc., can solve problems such as high boot efficiency and low boot noise, and achieve the effects of ensuring boot efficiency, reducing noise, and high boot 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, which can solve the problem that the laser projection device in the related art cannot take into account high start-up efficiency and low start-up noise

Method used

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Embodiment Construction

[0029] 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.

[0030] 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 .

[0031] The main control circuit 30 is respectively connected with the diffusion wheel drive circuit 40 and the switch circuit 50, and the main control circuit 30 is used to sequentially output the first start pulse width modulation signal and the second pulse width modulation signal to the diffusion wheel drive circuit 40 in response to the boot com...

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Abstract

The application discloses a laser projection device, which belongs to the field of laser projection display. The main control circuit in the device may respond to the start-up command, and sequentially provide the diffusion wheel driving circuit with a first starting pulse width modulation signal and a second starting pulse width modulation signal, and the duty ratio of the second starting pulse width modulation signal is greater than The duty cycle of the first starting pulse width modulation signal; the diffusion wheel drive circuit is used to drive the motor in the diffusion wheel to rotate under the drive of the pulse width modulation signal provided by the main control circuit. Since the diffusion wheel drive circuit can start the motor slowly based on the first start pulse width modulation signal with a small duty ratio during the start-up process, it can reduce the supply of the second start pulse with a large duty ratio by the main control circuit to the diffusion wheel drive circuit. The length of the wide modulation signal can effectively reduce the noise in the process of starting the motor while ensuring the start-up efficiency, that is, high start-up efficiency and low start-up 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. 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 further includes a main control circuit and a driving circuit for driving the diffusion wheel. The main control circuit can provide a driving signal to the driving circuit according to the magnitude of the starting current required to start the diffusion wheel. The...

Claims

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Application Information

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