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1. (WO2017150171) DETECTION DEVICE, KEYBOARD MUSICAL INSTRUMENT, DETECTION METHOD, AND PROGRAM

Pub. No.:    WO/2017/150171    International Application No.:    PCT/JP2017/005258
Publication Date: Sat Sep 09 01:59:59 CEST 2017 International Filing Date: Wed Feb 15 00:59:59 CET 2017
IPC: G10H 1/18
G10H 1/34
Applicants: YAMAHA CORPORATION
ヤマハ株式会社
Inventors: OTA, Tetsuo
太田 哲朗
FURUKAWA, Rei
古川 令
Title: DETECTION DEVICE, KEYBOARD MUSICAL INSTRUMENT, DETECTION METHOD, AND PROGRAM
Abstract:
This detection device is provided with: an operation detection unit which includes a plurality of light emitting units and a plurality of light receiving units and in which, according to movement of a moving body that corresponds to one of different combinations of any of the plurality of light emitting units and any of the plurality of light receiving units, the light reception level of the light receiving unit of the combination that corresponds to the moving body changes; a light emission control unit which causes, when drive signals are supplied, the plurality of light emitting units to emit light sequentially in respective light emission periods and which makes the signal levels of the drive signals different among a plurality of unit periods within each of the light emission periods; and a detection value selection unit which selects, as respective detection values in each of the light emission periods, the light reception levels, of the plurality of light receiving units, in any of the plurality of unit periods within the light emission period.