Apparatus and methods for dimming coherent light sources
US10277873B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 26, 2017 |
| Grant date | Apr 30, 2019 |
| Priority date | — |
| Expiry date | Jul 15, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/3161
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system and method for providing a dimming factor of N using a laser display device having plural colored laser diodes each generating a colored laser beam according to control parameters. At least one of the control parameters of at least one of the laser diodes is varied, at least one of the control parameters being operative to reduce intensity of at least one of the colored laser beams. Varying may comprise providing a dimming factor of m<N using first laser diode data current control apparatus able to provide m<N dimming levels and a dimming factor of at least N/m<N, using at least a second laser diode data current control apparatus able to provide a dimming factor of at least N/m, but less than N.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.