Dynamic illumination control for laser projection display
US8730399B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 13, 2012 |
| Grant date | May 20, 2014 |
| Priority date | — |
| Expiry date | Oct 4, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/3182
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A display apparatus includes one or more imaging channels, each imaging channel includes a polarized light source and a spatial light modulator that is actuable to modulate the polarized light and provide a modulated polarized light. A control logic processor is disposed to receive and analyze each frame of image data for the one or more imaging channels. A variable brightness attenuator in the path of the modulated polarized light and actuable under the control of the control logic processor to attenuate the modulated polarized light to one of a plurality of attenuation levels for the one or more imaging channels according to each frame of image data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.