Artificial reality systems including digital and analog control of pixel intensity
US11567325B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 9, 2020 |
| Grant date | Jan 31, 2023 |
| Priority date | — |
| Expiry date | Oct 9, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2300/0861
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Electronic display devices include digital and analog control of pixel intensity. A digital pixel control circuit and an analog pixel control circuit are provided within each pixel. The digital pixel control circuit employs digital PWM techniques to control a number of subframes within each frame during which a driving current is supplied to a light emitting element within the pixel. The analog pixel control circuit controls the level of the driving current supplied to the light emitting element within the pixel during the frame. In one example, the digital pixel control circuit and the analog pixel control circuit may together control pixel intensity with the analog pixel control circuit providing additional in-pixel bits for increased color depth. Alternatively, the digital pixel control circuit may control pixel intensity and the analog pixel control circuit may control non-uniformity compensation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.