Method and system for image processing for spatial light modulators
US7884839B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 5, 2005 |
| Grant date | Feb 8, 2011 |
| Priority date | — |
| Expiry date | Nov 21, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G3/2033
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of enhancing the gray scale resolution of a PWM system. The method includes defining an N-bit PWM sequence with a length of 2N−1 units. The N-bit PWM sequence includes a least significant bit (LSB) segment characterized by a temporal length of one unit. In some embodiments, the temporal length of one unit is referred to as a time t0. The method also includes defining a fractional PWM sequence. The fractional PWM sequence includes the N-bit PWM sequence and a fractional bit segment of temporal length F. The temporal length of the fractional PWM sequence is 2N−1+F units. In a particular embodiment, F=1 and the temporal length of the fractional PWM sequence is 2N.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.