Illuminating apparatus for operating section
US7399098B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 19, 2004 |
| Grant date | Jul 15, 2008 |
| Priority date | — |
| Expiry date | Apr 19, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2219/0622
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention is configured so that one light emission source such as a light emitting diode is placed inside an operation knob in front of a light guiding piece or in a bearing of the operation knob. A light beam from the light emission source is emitted to the interior of the operation knob. A reflected indirect light irregularly reflected inside the operation knob is received by the light guiding piece located at a rear surface of the operation knob. The light guiding piece has a transmission and diffusion function. The light is then guided toward an outer periphery to illuminate the rear surface of the operation knob.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.