公开(公告)号：US20190025090A1

公开(公告)日：2019-01-24

申请号：US16134761

申请日：2018-09-18

Applicant: Yamaha Corporation

Inventor： Taku UEDA ,  Yoshihiro SUZUKI ,  Yoshikatsu MATSUBARA ,  Yoshihiro NATSUME ,  Hisakazu KATO

IPC: G01D5/243

Abstract: A fixed element is provided to be used in a position detection device for detecting a position of a movable element that moves on the fixed element. The fixed element includes a substrate, a plurality of first electrodes and a second electrode. The substrate has as first surface, a second surface and a low-dielectric constant area. The second surface faces in an opposite direction to the first surface. The to low-dielectric constant area has a lower-dielectric constant than other portions of the substrate. The first electrodes are disposed on the first surface of the substrate. The first electrodes include three or more phases arranged one-dimensionally in a repeating pattern in a movement direction of the movable element. The second electrode is disposed on the first surface of the substrate and is arranged in the movement direction of the movable element adjacent the first electrodes. The low-dielectric constant area of the substrate is provided in a position between the first electrodes and the second electrode.

公开(公告)号：US20250029581A1

公开(公告)日：2025-01-23

申请号：US18905447

申请日：2024-10-03

Applicant: YAMAHA CORPORATION

Inventor： Yoshimasa ISOZAKI ,  Katsunori SUZUKI ,  Takahiro TERADA ,  Takashi MORI ,  Jun ISHII ,  Ibuki HANDA ,  Takuya FUJISHIMA ,  Koji YATAKA ,  Yukio WAKUI ,  Soichi TAKIGAWA ,  Akira MAEZAWA ,  Haruki OHKAWA ,  Yoshikatsu MATSUBARA ,  Yasuhiko OBA ,  Fukutaro OKUYAMA ,  Tomoya SASAKI ,  Rei FURUKAWA

IPC: G10H1/00 ,  G10H3/18

Abstract: A control device in one embodiment includes a first transmission unit, a first receiving unit, and a first generation unit. The first transmission unit is configured to transmit first performance data including contents of playing a keyboard instrument at a first communication base to a second communication base. The first receiving unit is configured to receive second performance data from the second communication base. The first generation unit is configured to generate a drive signal to produce a sound in accordance with the second performance data and output the drive signal to a sound generation device at the first communication base. At least one of the first performance data and the second performance data includes a key position signal indicating a key press amount on the keyboard instrument.