Colorimeter for measurement of temporally variant light sources
US5892585A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 4, 1997 |
| Grant date | Apr 6, 1999 |
| Priority date | — |
| Expiry date | Apr 4, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N17/02
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A colorimeter method and apparatus is described that is used to accurately deduce the color of a source which is varying in intensity with respect to time. The colorimeter consists of a plurality of sensors with varied spectral responsivity, a means of shielding these sensors from the effects of ambient illumination and a computational element to analyze the temporal and intensity variation of the signal under measurement. The output from the sensors is integrated and analyzed based upon the measured light intensity, time variant, and characteristics of the source. Sources such as CRT monitors, Flat Panel displays, and stroboscopic illuminators, are typical representations of time variant sources.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.