DK120379A - OPTICAL MATRIX KEYBOARD - Google Patents
OPTICAL MATRIX KEYBOARDInfo
- Publication number
- DK120379A DK120379A DK120379A DK120379A DK120379A DK 120379 A DK120379 A DK 120379A DK 120379 A DK120379 A DK 120379A DK 120379 A DK120379 A DK 120379A DK 120379 A DK120379 A DK 120379A
- Authority
- DK
- Denmark
- Prior art keywords
- optical matrix
- matrix keyboard
- keyboard
- optical
- matrix
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
- H03K17/965—Switches controlled by moving an element forming part of the switch
- H03K17/968—Switches controlled by moving an element forming part of the switch using opto-electronic devices
- H03K17/969—Switches controlled by moving an element forming part of the switch using opto-electronic devices having a plurality of control members, e.g. keyboard
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US88976078A | 1978-03-24 | 1978-03-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
DK120379A true DK120379A (en) | 1979-09-25 |
Family
ID=25395741
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DK120379A DK120379A (en) | 1978-03-24 | 1979-03-23 | OPTICAL MATRIX KEYBOARD |
Country Status (9)
Country | Link |
---|---|
EP (1) | EP0004520A1 (en) |
JP (1) | JPS54128629A (en) |
AU (1) | AU4534579A (en) |
BR (1) | BR7901789A (en) |
DK (1) | DK120379A (en) |
ES (1) | ES478865A1 (en) |
FI (1) | FI790943A (en) |
IT (1) | IT1166668B (en) |
NO (1) | NO790937L (en) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4379968A (en) * | 1980-12-24 | 1983-04-12 | Burroughs Corp. | Photo-optical keyboard having light attenuating means |
DE3307334A1 (en) * | 1983-03-02 | 1984-09-06 | Krone Gmbh, 1000 Berlin | Opto-electrical keyboard |
US4641026A (en) * | 1984-02-02 | 1987-02-03 | Texas Instruments Incorporated | Optically activated keyboard for digital system |
USRE33422E (en) * | 1984-02-02 | 1990-11-06 | Optically activated keyboard for digital system | |
HU191736B (en) * | 1984-12-21 | 1987-04-28 | Peter Ozorai | Method and optoelectronic keyboard for generating input signals of electronic apparatuses |
AU6837587A (en) * | 1985-10-18 | 1987-05-05 | Radice, P.F. | Pyroelectric keyboard |
FR2597988A1 (en) * | 1986-04-25 | 1987-10-30 | Souloumiac Alain | IMPROVING MATRIX SCANNING OPTICAL KEYBOARDS |
DE3700856A1 (en) * | 1987-01-14 | 1988-07-28 | Telefunken Electronic Gmbh | OPTOELECTRONIC KEYBOARD |
AU2304888A (en) * | 1987-08-21 | 1989-03-09 | Pennwalt Corporation | Pyroelectric keyboard |
DE4109517A1 (en) * | 1991-03-22 | 1992-09-24 | Holger Guenther Dr Frenzel | Keyboard with optical or electrical elements - has push-button that self latches into housing section |
US9838006B2 (en) * | 2015-02-27 | 2017-12-05 | Dong Guan Longideal Industrial Co., Ltd | Switch module of photoelectric integrated mechanical shaft keyboard |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3609713A (en) * | 1969-01-14 | 1971-09-28 | Ncr Co | Data entry means |
US3648050A (en) * | 1970-08-06 | 1972-03-07 | Tuh Kai Koo | Optoelectronic data entry means having plurality of control means to direct part of radiation in channel from radiation source to output channel |
US3775560A (en) * | 1972-02-28 | 1973-11-27 | Univ Illinois | Infrared light beam x-y position encoder for display devices |
-
1979
- 1979-01-04 EP EP79430003A patent/EP0004520A1/en not_active Withdrawn
- 1979-02-01 JP JP974879A patent/JPS54128629A/en active Pending
- 1979-02-27 IT IT20570/79A patent/IT1166668B/en active
- 1979-03-20 FI FI790943A patent/FI790943A/en not_active Application Discontinuation
- 1979-03-20 NO NO790937A patent/NO790937L/en unknown
- 1979-03-22 ES ES478865A patent/ES478865A1/en not_active Expired
- 1979-03-22 AU AU45345/79A patent/AU4534579A/en not_active Abandoned
- 1979-03-23 DK DK120379A patent/DK120379A/en unknown
- 1979-03-23 BR BR7901789A patent/BR7901789A/en unknown
Also Published As
Publication number | Publication date |
---|---|
JPS54128629A (en) | 1979-10-05 |
ES478865A1 (en) | 1979-06-01 |
BR7901789A (en) | 1979-11-20 |
IT7920570A0 (en) | 1979-02-27 |
FI790943A (en) | 1979-09-25 |
EP0004520A1 (en) | 1979-10-03 |
NO790937L (en) | 1979-09-25 |
IT1166668B (en) | 1987-05-06 |
AU4534579A (en) | 1979-09-27 |
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