Title:
DETECTION DEVICE, KEYBOARD MUSICAL INSTRUMENT, DETECTION METHOD, AND PROGRAM
Document Type and Number:
WIPO Patent Application WO/2017/150171
Kind Code:
A1
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.
Inventors:
OTA TETSUO (JP)
FURUKAWA REI (JP)
FURUKAWA REI (JP)
Application Number:
PCT/JP2017/005258
Publication Date:
September 08, 2017
Filing Date:
February 14, 2017
Export Citation:
Assignee:
YAMAHA CORP (JP)
International Classes:
G10H1/18; G10H1/34
Foreign References:
| JP2005195794A | 2005-07-21 |
Other References:
See also references of EP 3425625A4
Attorney, Agent or Firm:
OHBAYASHI, Akira et al. (JP)
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