Optically coupled decorative light controller
US4386550A · kind A · utility
7Cited by
13References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 10, 1980 |
| Grant date | Jun 7, 1983 |
| Priority date | — |
| Expiry date | Sep 10, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10H2230/351
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A digital rectangular wave musical tone generator (10) activates a speaker (12) to produce sounds of aural quality similar to musical instruments, while varying the intensity of light output from a light-emitting diode (13). The intensity variations of this light controls the resistance of a photoresistor (16), which varies the power supplied to decorative lights by a power control device (19), thus varying the intensity of the decorative lights in synchronism with the sound.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.