JPH038397U

JPH038397U -

Info

Publication number: JPH038397U
Application number: JP6917789U
Authority: JP
Priority date: 1989-06-14
Filing date: 1989-06-14
Publication date: 1991-01-25

Description

[Brief explanation of drawings]

第１図Ａ〜Ｃはこの考案の実施例である電子鍵
盤楽器のキー表面の構成図、キーに内蔵されるＩ
Ｃの構成図およびキー表面に被覆される接点シー
トの構成を示す図である。第２図Ａ，Ｂは前記Ｉ
Ｃが出力する検出波形信号波形を表す図である。
第３図は同電子鍵盤楽器の制御部のブロツク図、
第４図は同制御部の動作を示すフローチヤートで
ある。１６……タツチ数検出回路、３０……キー、３
１……共通電極、３２……検出用電極、３３……
アナログスイツチ、３４……ラツチ回路。 Figures 1A to 1C are diagrams of the key surfaces of an electronic keyboard instrument that is an embodiment of this invention, and the I/O built into the keys.
FIG. 4 is a diagram showing the configuration of C and the configuration of a contact sheet coated on the key surface. Figure 2 A and B are the above I
FIG. 3 is a diagram showing a detection waveform signal waveform outputted by C.
Figure 3 is a block diagram of the control section of the electronic keyboard instrument.
FIG. 4 is a flowchart showing the operation of the control section. 16...Touch number detection circuit, 30...Key, 3
1... common electrode, 32... detection electrode, 33...
Analog switch, 34...Latch circuit.

Claims

[Scope of utility model registration request]

In addition to providing touch number detection means for detecting the number of finger contacts on the surface of each key constituting the keyboard,
An electronic keyboard instrument characterized by comprising musical tone control means for controlling musical tones based on the number of touches detected by the detection means.