Optical power reduction by masking pixels of image content
US11630379B2 · kind B2 · utility
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18Claims
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Key dates
| Filing date | Mar 3, 2020 |
| Grant date | Apr 18, 2023 |
| Priority date | — |
| Expiry date | May 26, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/3194
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A scanning laser projection system includes a virtual protective housing circuit to automatically reduce accessible emissions of visible laser light by decimating areas of a projected image to reduce optical power exposure levels for safety, comfort, aesthetic, or system classification purposes. IR laser light pulses are scanned in a field of view, and a percentage of visible laser light pulses are blanked based on attributes of reflections of the IR laser light pulses.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.