Bright pointer for instrument cluster
US6974220B2 · kind B2 · utility
3Cited by
7References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 2, 2003 |
| Grant date | Dec 13, 2005 |
| Priority date | — |
| Expiry date | Jan 6, 2024 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60K2360/698
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An instrument display for a vehicle dash includes a unique light source and light guide assembly. The light source is incorporated directly into the light guide. A non-contact magnetic coupling transfers power from a circuit board to the light source. A textured surface is formed on one portion of the external surface of the light guide to evenly illuminate the light guide. Also, surface roughness on an opposing external surface portion of the light guide is varied depending on the length of the light guide to provide similar luminance for light guides having different lengths.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.