Driving arrangement for a varying color light emitting element
US4668895A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 17, 1986 |
| Grant date | May 26, 1987 |
| Priority date | — |
| Expiry date | Mar 17, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S362/811
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
This light emitting element comprises three differently colored luminous sources the excitation of which varies as a function of a signal developed by a physical phenomenon sensor, in particular a microphone. The analog signal emitted by the sensor is initially converted into a sequence of electrical pulses in a suitable converter. The leading edges of said pulses are next applied to a counter the output of which provides a coded signal which changes with the arrival of each such edge and thus determines a different state of excitation of the luminous sources. The arrangement as described enables changing the color of the element from a musical signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.