Position sensing device

Details Position sensing device Position sensing device

2011-03-08

2011-03-08

Warren, David S. (Department: 2832)

Music

Instruments

Electrical musical tone generation

C084S626000, C084S633000, C084S653000, C084S663000, C084S665000

Reexamination Certificate

active

07902448

ABSTRACT:
A method, operation position sensor device for an electronic musical, and musical instrument for detecting an operation position of an operation member in an electronic musical instrument. A determination is made of an amount of measured light resulting from the depression of the operation member has changed in excess of a predetermined difference value a number of times. A determination is made of a difference value of clock counts measured at a last two determinations that the measured light changed in excess of the predetermined difference value in response to determining that the amount of the measured light has changed in excess of the predetermined difference value the number of times. The difference value is converted to a key depression speed. A sound generation command is issued based on the key depression speed to a sound source.

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English machine translation of Abstract for JP 10-026983, date of publication Jan. 27, 1998.
English machine translation of abstract of JP 62232572, date of publication Oct. 13, 1987.

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