Layers of safety and failsafe capability for operation of class IV laser in consumer electronics devices
US10027181B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 29, 2016 |
| Grant date | Jul 17, 2018 |
| Priority date | — |
| Expiry date | Mar 18, 2037 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E10/56
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An optical power transfer device includes a transmitter circuit, including a laser light source that is configured to emit coherent light responsive to operation above a lasing threshold, and is configured to emit incoherent light responsive operation below the lasing threshold. A proximity sensor circuit is coupled to the transmitter circuit and is configured to output a detection signal therefrom responsive to authentication of an optical receiver including at least one photovoltaic cell having surface area of about 4 square millimeters or less within a proximity thereof. The transmitter circuit is configured to operate the laser light source below the lasing threshold to emit the incoherent light responsive to an absence of the detection signal from the proximity sensor circuit. Related devices and methods of operation are also discussed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.