JPS5567828A - Keyboard input device - Google Patents
Keyboard input deviceInfo
- Publication number
- JPS5567828A JPS5567828A JP14177078A JP14177078A JPS5567828A JP S5567828 A JPS5567828 A JP S5567828A JP 14177078 A JP14177078 A JP 14177078A JP 14177078 A JP14177078 A JP 14177078A JP S5567828 A JPS5567828 A JP S5567828A
- Authority
- JP
- Japan
- Prior art keywords
- key
- scanner
- key switch
- contents
- chattering
- 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
Links
Landscapes
- Input From Keyboards Or The Like (AREA)
Abstract
PURPOSE: To avoid the malfunction signal caused by the effect of the chattering and the external noise by delivering the operation signal corresponding to the key switch in case the operation is detected continuously for an optional key switch.
CONSTITUTION: A number of key switches are arrayed on keyboard 1, and scanner 2 detects sequentially the operation of these key switches in a time-division way. Memory circuit 3 memorizes the detection contents of one circulation to all key switches in response to the detection action of scanner 2. Then a comoarison is given between the contents of circuit 3 and the detection contents given from scanner 2, and the operation signal corresponding to the key switch is delivered 5 in case the operation of an optional key is detected over twice of the scanning. Thus the occurrence can be avoided for the malfunction signal due to the effect of the chattering and the external noise.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP53141770A JPS584367B2 (en) | 1978-11-16 | 1978-11-16 | keyboard input device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP53141770A JPS584367B2 (en) | 1978-11-16 | 1978-11-16 | keyboard input device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5567828A true JPS5567828A (en) | 1980-05-22 |
JPS584367B2 JPS584367B2 (en) | 1983-01-26 |
Family
ID=15299761
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP53141770A Expired JPS584367B2 (en) | 1978-11-16 | 1978-11-16 | keyboard input device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS584367B2 (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5776626A (en) * | 1980-10-31 | 1982-05-13 | Canon Inc | Key input equipment |
JPS5793356A (en) * | 1980-12-02 | 1982-06-10 | Ricoh Co Ltd | Data read method of device controlled by microcomputer |
JPS5797140A (en) * | 1980-12-10 | 1982-06-16 | Hitachi Ltd | Key input controller |
JPS57161921A (en) * | 1981-03-31 | 1982-10-05 | Fuji Electric Co Ltd | Signal processing system |
JPS5860340A (en) * | 1981-10-06 | 1983-04-09 | Brother Ind Ltd | Keyboard controlling device |
JPS5896335A (en) * | 1981-12-01 | 1983-06-08 | Alps Electric Co Ltd | Scanning method of keyboard device |
JPS6010325A (en) * | 1983-06-30 | 1985-01-19 | Fujitsu Ltd | Key scanning system |
JPS61259322A (en) * | 1985-05-13 | 1986-11-17 | Nec Corp | Key scanning system |
JPS62154125A (en) * | 1985-12-27 | 1987-07-09 | Toshiba Corp | Keyboard device |
JPS62138235U (en) * | 1986-02-21 | 1987-08-31 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0347830Y2 (en) * | 1986-09-17 | 1991-10-11 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5017929A (en) * | 1973-06-18 | 1975-02-25 | ||
JPS5224436A (en) * | 1975-08-19 | 1977-02-23 | Sharp Corp | Key input unit |
JPS5251828A (en) * | 1975-10-23 | 1977-04-26 | Omron Tateisi Electronics Co | Key input discriminating unit |
JPS5253629A (en) * | 1975-10-24 | 1977-04-30 | Tektronix Inc | Keyboard device |
-
1978
- 1978-11-16 JP JP53141770A patent/JPS584367B2/en not_active Expired
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5017929A (en) * | 1973-06-18 | 1975-02-25 | ||
JPS5224436A (en) * | 1975-08-19 | 1977-02-23 | Sharp Corp | Key input unit |
JPS5251828A (en) * | 1975-10-23 | 1977-04-26 | Omron Tateisi Electronics Co | Key input discriminating unit |
JPS5253629A (en) * | 1975-10-24 | 1977-04-30 | Tektronix Inc | Keyboard device |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5776626A (en) * | 1980-10-31 | 1982-05-13 | Canon Inc | Key input equipment |
JPS5793356A (en) * | 1980-12-02 | 1982-06-10 | Ricoh Co Ltd | Data read method of device controlled by microcomputer |
JPS5797140A (en) * | 1980-12-10 | 1982-06-16 | Hitachi Ltd | Key input controller |
JPS57161921A (en) * | 1981-03-31 | 1982-10-05 | Fuji Electric Co Ltd | Signal processing system |
JPS5860340A (en) * | 1981-10-06 | 1983-04-09 | Brother Ind Ltd | Keyboard controlling device |
JPS5896335A (en) * | 1981-12-01 | 1983-06-08 | Alps Electric Co Ltd | Scanning method of keyboard device |
JPS6010325A (en) * | 1983-06-30 | 1985-01-19 | Fujitsu Ltd | Key scanning system |
JPS61259322A (en) * | 1985-05-13 | 1986-11-17 | Nec Corp | Key scanning system |
JPS62154125A (en) * | 1985-12-27 | 1987-07-09 | Toshiba Corp | Keyboard device |
JPS62138235U (en) * | 1986-02-21 | 1987-08-31 |
Also Published As
Publication number | Publication date |
---|---|
JPS584367B2 (en) | 1983-01-26 |
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