The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 03, 1987
Filed:
Jan. 30, 1986
Eisaku Okamoto, Hamamatsu, JP;
Nippon Gakki Seizo Kabushiki Kaisha, Hamamatsu, JP;
Abstract
In a key depression indicating device for an electronic musical instrument capable of visually indicating which keys are to be depressed on a keyboard, the device includes a plurality of indicators provided correspondingly to a plurality of keys of the keyboard. Illumination of each indicators is so controlled by an illumination control means that an indicator corresponding to a succeeding note is lighted up at a timing, for example, a 4-th note's length ahead of the timing to depress the key irrespective of any length of the preceding note. Thus, even when a complicated music performance including a train of a plurality of consecutive short notes as a 32nd note is required, the indicators corresponding to the preceding as well as the succeeding notes in the train are each lighted up at a timing, i.e. the 4-th note's time length ahead of each actual key depression timing for the music performance. In this way, since there is given a sufficient ready time for each note, the player of the instrument is able to perform a smooth key depressing operation in accordance with the key-depressing indications given by the device.