Touch control apparatus of electronic musical instrument

Details Touch control apparatus of electronic musical instrument Touch control apparatus of electronic musical instrument

2011-05-24

2011-05-24

Fletcher, Marlon T (Department: 2832)

Music

Instruments

General features

C084S018000, C084S020000, C084S423001, C084S744000

Reexamination Certificate

active

07947887

ABSTRACT:
In order to detect a state of a key30, a differential acceleration sensor38is provided in addition to a common position sensor35and a velocity sensor36. A reaction force applied by a solenoid unit20is determined on the basis of a function which monotonously increases with respect to a differential acceleration signal j in an initial period which is an early stage of depression of a key. After a lapse of the initial period, the reaction force is determined in accordance with velocity, acceleration and the like, referring to a table. As a result, the reaction force rises up rapidly when a key is depressed strongly.

REFERENCES:
patent: 5922983 (1999-07-01), Muramatsu
patent: 7777115 (2010-08-01), Komatsu et al.
patent: 2005/0139060 (2005-06-01), Muramatsu
patent: 2005/0211050 (2005-09-01), Fujiwara
patent: 2008/0141847 (2008-06-01), Komatsu et al.
patent: 2004-094160 (2004-03-01), None
patent: 2005-195619 (2005-07-01), None
patent: 2006-023287 (2006-01-01), None
patent: 3772491 (2006-02-01), None

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