Bit-splitting for pulse width modulated spatial light modulator
US5969710A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 30, 1996 |
| Grant date | Oct 19, 1999 |
| Priority date | — |
| Expiry date | Aug 30, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2005/7466
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of implementing pulse-width modulation in a display system (10, 20) that uses a spatial light modulator (SLM) (15) Each frame of data is divided into bit-planes, each bit-plane having one bit of data for each pixel of the SLM and representing a bit weight of the intensity value to be displayed by the pixels. Each bit-plane has a display time corresponding to a portion of the frame period, with bit-planes of more significant bits having longer portions. Then, the display times for one or more of the more significant bits are segmented so that the data for those bits can be displayed in segments rather than for a continuous time. (FIG. 3A). The segments are distributed throughout the frame period to reduce visual artifacts. (FIG. 3B).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.