Apparatus and method of providing switching frequency synchronization
US6160591A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Sep 19, 1997 |
| Grant date | Dec 12, 2000 |
| Priority date | — |
| Expiry date | Sep 19, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/21
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An apparatus and method for reducing interference on a display screen in an in-flight entertainment system, where the interference results from power conversion by a power regulator that supplies voltage to the display screen, is disclosed. The apparatus comprises a clock generator that provides a video clock signal and a regulator clock signal having a frequency that is a multiple of a frequency of the video clock signal. The apparatus also comprises a video processing circuit coupled to the clock generator that provides video data to the display screen at a rate derived from the video clock signal. A regulator circuit that is coupled to the video processing circuit and to the clock generator, supplies voltage to the video processing circuit at a rate based on the regulator clock signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.