Lighting indicating device having plural illuminating elements with all such elements being illuminated with one being greater than the others
US5399940A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 9, 1993 |
| Grant date | Mar 21, 1995 |
| Priority date | — |
| Expiry date | Jun 9, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B47/185
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A lighting control device for controlling the state and intensity of a lamp includes a user-actuatable intensity selector for selecting a desired lamp intensity level between minimum and maximum intensity levels. The device further includes a programmable microprocessor for storing a preset lamp intensity level, and a linear array of indicator lights (e.g. LED's) for indicating the available range of lamp intensities. According to a preferred embodiment, the microprocessor operates to illuminate all lights in the array when the lamp is OFF, with one indicator light being more brightly illuminated to indicate the preset intensity level. When the lamp is ON, only that indicator light representing the present lamp intensity level is illuminated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.