JPS5549732A - Electrostatic capacity type keyboard - Google Patents
Electrostatic capacity type keyboardInfo
- Publication number
- JPS5549732A JPS5549732A JP12230178A JP12230178A JPS5549732A JP S5549732 A JPS5549732 A JP S5549732A JP 12230178 A JP12230178 A JP 12230178A JP 12230178 A JP12230178 A JP 12230178A JP S5549732 A JPS5549732 A JP S5549732A
- Authority
- JP
- Japan
- Prior art keywords
- electrostatic capacity
- switch
- signal
- scanning
- circuit
- 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
Abstract
PURPOSE: To eliminate chattering of an electrostatic capacity-type switch by deciding ON in case of ON in re-check at a delay time after switch ON signal detection.
CONSTITUTION: Operation states of electrostatic capacity-type switches at intersections of matrix 6 are monitored by scanning successively plural signal lines 18 and scanning successively plural receiving lines 14 selectively synchronously with a series of transmission pulse trains. At this time, when a switch ON signal is detected in a specific positin, ON is decided in case of ON in re-scanning after a fixed time elapse. Bias circuit 11 wich gives a threshold and matrix signal detection circuit 8 which has a feedback resistance are used as a circuit for this ON detection.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP53122301A JPS6036607B2 (en) | 1978-10-04 | 1978-10-04 | capacitive keyboard |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP53122301A JPS6036607B2 (en) | 1978-10-04 | 1978-10-04 | capacitive keyboard |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5549732A true JPS5549732A (en) | 1980-04-10 |
JPS6036607B2 JPS6036607B2 (en) | 1985-08-21 |
Family
ID=14832558
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP53122301A Expired JPS6036607B2 (en) | 1978-10-04 | 1978-10-04 | capacitive keyboard |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6036607B2 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5965348A (en) * | 1982-10-06 | 1984-04-13 | Toupure Kk | Capacitive keyboard |
JPS60181815A (en) * | 1984-02-29 | 1985-09-17 | Toupure Kk | Capacitive keyboard |
JPS61234418A (en) * | 1985-04-11 | 1986-10-18 | Matsushita Electric Ind Co Ltd | Drive circuit for keyboard switch |
JPS61260317A (en) * | 1985-05-15 | 1986-11-18 | Oki Electric Ind Co Ltd | Control system for electrostatic capacity type keyboard |
JPH01185630A (en) * | 1988-01-20 | 1989-07-25 | Fuji Photo Film Co Ltd | Heat developable photosensitive material |
-
1978
- 1978-10-04 JP JP53122301A patent/JPS6036607B2/en not_active Expired
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5965348A (en) * | 1982-10-06 | 1984-04-13 | Toupure Kk | Capacitive keyboard |
JPH0315853B2 (en) * | 1982-10-06 | 1991-03-04 | Topure Kk | |
JPS60181815A (en) * | 1984-02-29 | 1985-09-17 | Toupure Kk | Capacitive keyboard |
US4772874A (en) * | 1984-02-29 | 1988-09-20 | Topre Corporation | Keyboard apparatus |
JPS61234418A (en) * | 1985-04-11 | 1986-10-18 | Matsushita Electric Ind Co Ltd | Drive circuit for keyboard switch |
JPS61260317A (en) * | 1985-05-15 | 1986-11-18 | Oki Electric Ind Co Ltd | Control system for electrostatic capacity type keyboard |
JPH0731570B2 (en) * | 1985-05-15 | 1995-04-10 | 沖電気工業株式会社 | Capacitance type keyboard control system |
JPH01185630A (en) * | 1988-01-20 | 1989-07-25 | Fuji Photo Film Co Ltd | Heat developable photosensitive material |
Also Published As
Publication number | Publication date |
---|---|
JPS6036607B2 (en) | 1985-08-21 |
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