JPS5567829A - Keyboard input device - Google Patents

Keyboard input device

Info

Publication number
JPS5567829A
JPS5567829A JP14177178A JP14177178A JPS5567829A JP S5567829 A JPS5567829 A JP S5567829A JP 14177178 A JP14177178 A JP 14177178A JP 14177178 A JP14177178 A JP 14177178A JP S5567829 A JPS5567829 A JP S5567829A
Authority
JP
Japan
Prior art keywords
scanning
circuit
pressing operation
detected
key switch
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.)
Granted
Application number
JP14177178A
Other languages
Japanese (ja)
Other versions
JPS5752611B2 (en
Inventor
Takemi Yamamoto
Noriiku Makino
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Brother Industries Ltd
Original Assignee
Brother Industries Ltd
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 by Brother Industries Ltd filed Critical Brother Industries Ltd
Priority to JP14177178A priority Critical patent/JPS5567829A/en
Publication of JPS5567829A publication Critical patent/JPS5567829A/en
Publication of JPS5752611B2 publication Critical patent/JPS5752611B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Input From Keyboards Or The Like (AREA)

Abstract

PURPOSE: To enhance the output reliability for the data signal by delivering the operation signal in response to the key switch in case the pressing operation is detected continuously and in the same frequency as the scanning frequency via the scanning circuit and the scanning control unit.
CONSTITUTION: Scanning circuit 2 detects each pressing operation in the prescribed sequence for plural number of key switches arrayed on keyboard 1. And when the pressing operation is detected by circuit 2 for an optional key switch, scanning control unit 3 gives alteration to the scanning sequence of circuit 2 to give the second scanning or the scanning of several times to the key switch to which the pressing operation is detected. Here outout control circuit 5 delivers the operation signal in response to the key switch to which the pressing operation is detected by circuit 2 and unit 3 continuously and in the same frequency as the scanning frequency. In this way, the reliability can be increased for the output of the data signal.
COPYRIGHT: (C)1980,JPO&Japio
JP14177178A 1978-11-16 1978-11-16 Keyboard input device Granted JPS5567829A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14177178A JPS5567829A (en) 1978-11-16 1978-11-16 Keyboard input device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14177178A JPS5567829A (en) 1978-11-16 1978-11-16 Keyboard input device

Publications (2)

Publication Number Publication Date
JPS5567829A true JPS5567829A (en) 1980-05-22
JPS5752611B2 JPS5752611B2 (en) 1982-11-09

Family

ID=15299786

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14177178A Granted JPS5567829A (en) 1978-11-16 1978-11-16 Keyboard input device

Country Status (1)

Country Link
JP (1) JPS5567829A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57150027A (en) * 1981-03-11 1982-09-16 Omron Tateisi Electronics Co Keyboard encoder

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5251828A (en) * 1975-10-23 1977-04-26 Omron Tateisi Electronics Co Key input discriminating unit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5251828A (en) * 1975-10-23 1977-04-26 Omron Tateisi Electronics Co Key input discriminating unit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57150027A (en) * 1981-03-11 1982-09-16 Omron Tateisi Electronics Co Keyboard encoder
JPS6135567B2 (en) * 1981-03-11 1986-08-13 Omron Tateisi Electronics Co

Also Published As

Publication number Publication date
JPS5752611B2 (en) 1982-11-09

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