System and method for converting ambient light energy into a digitized electrical output signal for controlling display and keypad illumination on a battery powered system
US7109465B2 · kind B2 · utility
58Cited by
6References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 4, 2003 |
| Grant date | Sep 19, 2006 |
| Priority date | — |
| Expiry date | Nov 16, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02D30/70
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A system and method of ambient light detection with digitized output. A light sensitive device is coupled to electronic circuitry for receiving an output of the light sensitive device corresponding to a level of ambient light. The electronic circuitry compares the output to a threshold level. The threshold level corresponds to a desired level of light. The electronic circuitry for provides an output signal indicative of said desired level of light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.