The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 03, 2023
Filed:
Jan. 10, 2020
Hangzhou Uphoton Optoelectronics Technology Co., Ltd., Zhejiang Province, CN;
Xiaodong Yin, Zhejiang Province, CN;
Kehan Tian, Zhejiang Province, CN;
Lixin Wei, Zhejiang Province, CN;
Hangzhou UPhoton Optoelectronics Technology Co., Ltd., Zhejiang Province, CN;
Abstract
A light projection method with safety protection and a light projection device with safety projection. The light projection method () comprises: turning on a light source at a safe power level (S); using a diffractive optical element to modulate light emitted from the light source so as to project a pattern onto a target surface (S); acquiring the pattern (S); determining whether the pattern is normal (S); and if so, turning on the light source at a rated power level, wherein the rated power level is higher than the safe power level (S). The invention enables an optical system to have a smaller size while ensuring safety of a user, simplifies a structure, reduces costs, and facilitates efficient utilization of optical energy.