Electrically illuminating indicator needle and light guiding member
US7721672B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 17, 2006 |
| Grant date | May 25, 2010 |
| Priority date | — |
| Expiry date | Jun 29, 2026 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60K2360/6992
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electrically illuminating indicator needle and a light guiding member therefor that allow such a control as length of the needle can be varied while undergoing less unevenness in luminance and can be manufactured at a lower cost are provided.The electrically illuminating indicator needle comprises a plurality of planes of incidence, a plurality of light reflecting surfaces disposed to correspond to the planes of incidence so as to reflect light coming from the planes of incidence, a light guiding member disposed to correspond to the light reflecting surfaces so as to cause the light reflected on the light reflecting surfaces to emerge, and a plurality of light emitting diodes disposed to oppose the planes of incidence.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.