Interior rearview mirror system
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United States of America Patent
Stats
-
Oct 9, 2012
Grant Date -
Feb 3, 2011
app pub date -
Oct 18, 2010
filing date -
Jun 6, 2002
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An interior rearview mirror system for a vehicle includes an interior rearview mirror assembly having a mirror casing, a reflective element and an application specific integrated compass chip. The application specific integrated compass chip includes at least two magnetoresponsive sensing elements established on a semiconductor substrate, and further includes associated circuitry commonly established with the magnetoresponsive sensing elements on the semiconductor substrate. Processing of an algorithm by a microprocessor of the interior rearview mirror system determines a directional heading of the vehicle responsive to a sensing of a magnetic field by the magnetoresponsive sensing elements and automatically compensates for a deviating magnetic field. An information display of the interior rearview mirror assembly displays the directional heading of the vehicle. The application specific integrated compass chip may have an area of less than approximately two square centimeters.
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