Electrical indicator having an optical position encoder
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United States of America Patent
Stats
-
Nov 7, 1989
Grant Date -
N/A
app pub date -
Dec 23, 1987
filing date -
Dec 27, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An indicator includes an indicating member driving unit, an encoder plate, a rotational position detecting unit, and an indication position control unit. The indicating member driving unit rotates an indicating member mounted on a rotor shaft in accordance with an electrical signal input to cause the indicating member to indicate. The encoder plate rotates in association with the indicating member. The rotational position detecting unit detects an actual indication position of the indicating member on the basis of a rotational amount of the encoder plate. The indication position control unit controls the indication position of the indicating member so that the actual indication position of the indicating member detected by the rotational position detecting unit coincides with an indication position of the indicating member determined in correspondence to the electrical signal input.
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