JPH0333493U - - Google Patents

Info

Publication number
JPH0333493U
JPH0333493U JP9454289U JP9454289U JPH0333493U JP H0333493 U JPH0333493 U JP H0333493U JP 9454289 U JP9454289 U JP 9454289U JP 9454289 U JP9454289 U JP 9454289U JP H0333493 U JPH0333493 U JP H0333493U
Authority
JP
Japan
Prior art keywords
key
specific wavelength
light beam
keyboard
broadband light
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP9454289U
Other languages
English (en)
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP9454289U priority Critical patent/JPH0333493U/ja
Publication of JPH0333493U publication Critical patent/JPH0333493U/ja
Pending legal-status Critical Current

Links

Description

【図面の簡単な説明】
第1図はこの考案の実施例であるキー押下状態
検出装置が適用された電子鍵盤楽器の鍵盤下部の
構成図、第2図は同電子鍵盤楽器の制御部のブロ
ツク図、第3図は同電子鍵盤楽器の押下パターン
検出回路のブロツク図、第4図は同電子鍵盤楽器
の制御部の動作を示すフローチヤートである。 16……押下パターン検出回路、30……キー
、32……選択波長反射板、34……受光素子、
35……白色光源、36……レンズ、37……規
制板、40……アンプ、41……A/D変換回路
。

Claims (1)

  1. 【実用新案登録請求の範囲】 複数のキーを有する鍵盤楽器において、 鍵盤近傍を横切る広帯域光線と、 キーの押下に伴つて前記広帯域光線の光路に介
    入される特定波長反射板と、この特定波長反射板
    の反射光を受光する受光素子と、を各キーごとに
    設け、 かつ、各キーに設けられた特定波長反射板の反
    射波長を互いに異ならせたことを特徴とする鍵盤
    楽器のキー押下状態検出装置。
JP9454289U 1989-08-11 1989-08-11 Pending JPH0333493U (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9454289U JPH0333493U (ja) 1989-08-11 1989-08-11

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9454289U JPH0333493U (ja) 1989-08-11 1989-08-11

Publications (1)

Publication Number Publication Date
JPH0333493U true JPH0333493U (ja) 1991-04-02

Family

ID=31643866

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9454289U Pending JPH0333493U (ja) 1989-08-11 1989-08-11

Country Status (1)

Country Link
JP (1) JPH0333493U (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007078956A (ja) * 2005-09-13 2007-03-29 Casio Comput Co Ltd 演奏教習装置および演奏教習処理のプログラム

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007078956A (ja) * 2005-09-13 2007-03-29 Casio Comput Co Ltd 演奏教習装置および演奏教習処理のプログラム

Similar Documents

Publication Publication Date Title
KR840000813A (ko) 비접촉 가시 근접 감지장치
US4939793A (en) Integrated circuit assembly with optically coupled components
CA2058514A1 (en) Polarization illumination device and projector having the same
KR920006745A (ko) 광학식 부호기
CA2067019A1 (en) Externally modulated laser source for array illumination
ES2046388T3 (es) Transmisor de la posicion optica.
JPS6226059B2 (ja)
FI97846B (fi) Kytkentälaite
JPS63106034U (ja)
SE8102853L (sv) Backspegel
JPS61218013A (ja) 光学式スイツチ
JPH0432719Y2 (ja)
JPH0335129A (ja) 広波長域用光源装置
JPS57211870A (en) Lighting device
JPH02100222U (ja)
JPH07168572A (ja) 電子楽器の鍵盤装置
JPH0276685U (ja)
JPS6450460U (ja)
JPH0362398U (ja)
JPH05205097A (ja) 画像入力装置と入力方法
JPH02128114U (ja)
JPS6270988U (ja)
JPH0224355U (ja)
JPH0228364U (ja)
JPS626975U (ja)