Miniature display apparatus and method
US6525709B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 17, 1997 |
| Grant date | Feb 25, 2003 |
| Priority date | — |
| Expiry date | Oct 17, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2310/0259
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A display system includes a spatial light modulator having an array of individually controlled pixels switchable between a first and a second state for producing modulated light having gray scale during a given period of time. The system generates a reference signal that varies in a predetermined way during the given period of time. The system also generates analog pixel image signals associated with each of the pixels for the given period of time. The analog pixel image signal representing a desired gray scale level for each associated pixel during the given period of time. Each of the pixels includes an arrangement for receiving the reference signal and an arrangement for receiving the analog pixel image signal associated with that pixel. A comparator within each pixel compares the reference signal and the analog pixel image signal associated with that pixel and outputs a signal for switching the pixel between the first and the second state when the reference signal reaches a predetermined level relative to the analog pixel image signal. In a display system that uses a light modulating medium that requires DC-field balancing, the pixel may further include an inverter arrangement …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.