Unlock instant, AI-driven research and patent intelligence for your innovation.

A laser projection device

A technology of laser projection and equipment, applied in optics, instruments, projection devices, etc., can solve the problems of easy failure, endangering the safety of users, and burnout of the entire laser projection equipment of the light conversion device.

Active Publication Date: 2021-07-06
APPOTRONICS CORP LTD
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, software detection is often prone to failure, and it is easy to cause the optical conversion device or even the entire laser projection equipment to be burned by the laser, endangering the safety of users.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A laser projection device
  • A laser projection device
  • A laser projection device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] An embodiment of the present application provides a laser projection device, wherein the laser projection device includes an excitation light generating device 10 and a light conversion device 20. When the laser projection device is in a normal working state, the light conversion device 20 moves periodically and is in a high-speed rotation mode. At this time, the excitation light generated by the excitation light generation device 10 is periodically irradiated to different positions on the light conversion device 20, and the light conversion device 20 is excited to generate the laser light that is transmitted to the optical path of the laser projection device. When the light conversion device 20 stops working Or when the rotation speed is too low, if the excitation light generating device 10 should also suspend its work, so as to prevent the excitation light from irradiating the same position on the light conversion device 20 for a long time and avoid the light conversion...

Embodiment 2

[0040] Such as Figure 5a and Figure 5b As shown, this embodiment adds a processor 60 on the basis of the first embodiment. Utilize the frequency converter 40 and the comparator 50 to monitor the light conversion device 20, output the level signal to the processor 60, and the processor 60 outputs a shutdown control signal when receiving an effective level, and controls the shutdown of the excitation light generating device .

[0041] The processor 60 is connected to the output terminal of the comparator 50, and is used for outputting a shutdown control signal when receiving an active level output from the comparator 50. Wherein, the turn-off control signal is used to turn off the excitation light generating device 10 .

Embodiment 3

[0043] Such as Figure 6a and Figure 6b As shown, in this embodiment, on the basis of Embodiment 1, a processor 60 is added, and while the frequency converter 40 and the comparator 50 are used to monitor the optical conversion device 20, the processor 60 is used to monitor the operation of the optical conversion device 20 The speed is detected to further protect the optical conversion device and improve the effectiveness of monitoring.

[0044] The processor 60 of this embodiment is connected to the output terminal of the comparator 50, and is used for outputting a power-off control signal when the processor 60 receives an active level output from the comparator 50. Simultaneously, the processor 60 is also connected to the output end of the frequency detection device 30, and is also used for calculating the motion frequency of the optical conversion device 20 based on the pulse signal output by the frequency detection device 30, and comparing the motion frequency with the re...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The laser projection equipment provided by the present application includes: a light conversion device provided with a marker, a frequency detection device outputs a pulse signal when the marker detects that the marker passes a predetermined position, a frequency converter inputs the pulse signal and outputs a measured electrical signal according to the frequency of the pulse signal , the comparator compares the measured electrical signal with the reference electrical signal, and when the value of the measured electrical signal is smaller than the value of the reference electrical signal, the output active level will excite the light generating device to turn off. It is possible to convert the operating frequency of the optical conversion device into an electrical signal through hardware components, and then compare the electrical signal with the reference value to know whether the operating frequency of the optical conversion device is within the standard range. When the time comes, turn off the light conversion device in time to prevent the light conversion device and laser projection equipment from being broken down or burned by the excitation light generation device, effectively protect the light conversion device, and improve the safety of laser projection equipment.

Description

technical field [0001] The present application relates to a laser projection device. Background technique [0002] Existing laser projection equipment mostly works through an excitation light generating device and a light conversion device. Such as figure 1 Shown is the optical path diagram of the internal system of the laser projection equipment. When the laser projection equipment is in a normal working state, the light conversion device 1 is in the high-speed rotation mode. At this time, the excitation light generation device 2 is transmitted to the optical path through the light conversion device 1. When When the light conversion device 1 stops working, if the excitation light generation device 2 is still working, the high-energy excitation light beam emitted by the excitation light generation device 2 will irradiate the same position on the light conversion device 1 for a long time, and will The light conversion device 1 is broken down, causing damage to the light con...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G03B21/20
CPCG03B21/204G03B21/206G03B21/2086
Inventor 孙敏李屹
Owner APPOTRONICS CORP LTD