Universal device and use thereof for the automatic adjustment of a projector
US6483555B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 11, 1998 |
| Grant date | Nov 19, 2002 |
| Priority date | — |
| Expiry date | Dec 11, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N17/04
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A universal device provided with means to be controlled by a control unit which forms part of a projector. The device, in conjunction with this control unit, can be used for the automatic adjustment of the projector. More specifically, the adjustments of convergence, geometry, focus, astigmatism, contrast modulation, gamma correction, soft edge, adjacent and overlapping geometry. In addition, the device provides support for non-adjustment tasks such as signal decoding, signal testing and analysis, peak detection, RAM expansion, wire-free transmission of information between at least two projectors. The universal device exhibits different operational characteristics in accordance with different applications imposed on it by the control unit of the projector. The device includes an analog-to-digital converter, a memory, a programmable digital component, and an interface to the control unit of the projector as some of the components.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.