Rotating gauge pointer and light guide between LCD and LED
US7675428B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 19, 2007 |
| Grant date | Mar 9, 2010 |
| Priority date | — |
| Expiry date | Sep 30, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D2207/30
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An indicating instrument for a vehicle may employ an analog type lighted pointer arranged on a rotatable, circular shaped pointer disk, a liquid crystal display arranged over the pointer disk, and a first dial with indicia located outboard of or adjacent to and/or inboard of the LCD. A second or inboard dial may be located over the liquid crystal display. The pointer disk may be a translucent light collector for the pointer yet also transmit light to provide backlighting for the LCD. Depending upon the analog gauge arrangement, the pointer may point outboard of the pointer disk or toward the LCD center. The dials, especially the second dial, may be in the shape of rings to permit viewing of the LCD from the perspective of a viewer, such as a vehicle driver.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.