Method and apparatus for controlling a laser projection device
US10291891B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Feb 28, 2017 |
| Grant date | May 14, 2019 |
| Priority date | — |
| Expiry date | Apr 11, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J5/0025
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The application provides a method and an apparatus for controlling a laser projection device, the laser projection device being provided with a thermoinduction sensor on housing for acquiring an infrared signal in environment where the laser projection device is located, the method including: acquiring first signal outputted by the thermoinduction sensor in first moment and second signal outputted in current moment, the first moment being prior to the current moment, first signal and second signal being signals outputted by the thermoinduction sensor according to the infrared signal; determining a first signal change rate according to first difference between first signal and second signal and second difference between first moment and current moment; reading a preset signal change rate and a threshold signal; determining an operation mode of laser projection device according to magnitude relation of first signal change rate and preset signal change rate, second signal and threshold signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.