Projection system, and method of operating a projection system
US6631996B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 9, 2001 |
| Grant date | Oct 14, 2003 |
| Priority date | — |
| Expiry date | Jun 7, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/74
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of operating a projection system with at least one high intensity discharge lamp (HID lamp), a rotatable color disc with at least three segments of different colors, and an array (DMD) comprising a plurality of individually movable mirrors, wherein the current strength of the electrical operating current supplied to the HID lamp is varied in time such that the light arc of the lamp is stabilized, is to be constructed such that the power and operational life of the HID lamp used are optimized. The current strength of the operating current for the HID lamp is for this purpose varied such that the current strength reaches a maximum when a given segment of the color disc, and preferably exclusively this segment, is present in the radiation path of the light rays used for the projection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.