Electric rearview mirror device for a vehicle
US4986646A · kind A · utility
22Cited by
2References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 12, 1989 |
| Grant date | Jan 22, 1991 |
| Priority date | — |
| Expiry date | Jul 12, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/45185
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
The electric rearview mirror system comprising a position sensor which outputs a position signal showing the rotational position of the mirror body, memory device which stores the position signal from the position sensor at a prescribed sampling period, and a motor control circuit which judges the rotational direction of the mirror body based on the change with time of the position signal stored in the memory device and turns off the motor when the judged direction of the motor is opposite to the rotational direction of the mirror body due to the mirror driving mechanism.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.