High efficiency laser modulation
US9167217B2 · kind B2 · utility
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20Claims
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Key dates
| Filing date | May 2, 2013 |
| Grant date | Oct 20, 2015 |
| Priority date | — |
| Expiry date | Jul 16, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/0427
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A scanning laser projector drives laser light sources with waveforms for higher efficiency. Optical light power values for pixels are mapped to amplitude/duration pairs. Laser diodes are driven with electrical currents having the amplitude for time period specified by the duration. For increasing optical light power values, amplitude values are increased, and then durations are increased.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.