IT7920570A0 - Tastiera ottica a matrice. - Google Patents

Tastiera ottica a matrice.

Info

Publication number
IT7920570A0
IT7920570A0 IT7920570A IT2057079A IT7920570A0 IT 7920570 A0 IT7920570 A0 IT 7920570A0 IT 7920570 A IT7920570 A IT 7920570A IT 2057079 A IT2057079 A IT 2057079A IT 7920570 A0 IT7920570 A0 IT 7920570A0
Authority
IT
Italy
Prior art keywords
optical matrix
matrix keyboard
keyboard
optical
matrix
Prior art date
Application number
IT7920570A
Other languages
English (en)
Other versions
IT1166668B (it
Original Assignee
Ibm
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 Ibm filed Critical Ibm
Publication of IT7920570A0 publication Critical patent/IT7920570A0/it
Application granted granted Critical
Publication of IT1166668B publication Critical patent/IT1166668B/it

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
IT20570/79A 1978-03-24 1979-02-27 Tastiera ottica a matrice IT1166668B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US88976078A 1978-03-24 1978-03-24

Publications (2)

Publication Number Publication Date
IT7920570A0 true IT7920570A0 (it) 1979-02-27
IT1166668B IT1166668B (it) 1987-05-06

Family

ID=25395741

Family Applications (1)

Application Number Title Priority Date Filing Date
IT20570/79A IT1166668B (it) 1978-03-24 1979-02-27 Tastiera ottica a matrice

Country Status (9)

Country Link
EP (1) EP0004520A1 (it)
JP (1) JPS54128629A (it)
AU (1) AU4534579A (it)
BR (1) BR7901789A (it)
DK (1) DK120379A (it)
ES (1) ES478865A1 (it)
FI (1) FI790943A7 (it)
IT (1) IT1166668B (it)
NO (1) NO790937L (it)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
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 (de) * 1983-03-02 1984-09-06 Krone Gmbh, 1000 Berlin Opto-elektrische tastatur
USRE33422E (en) * 1984-02-02 1990-11-06 Optically activated keyboard for digital system
US4641026A (en) * 1984-02-02 1987-02-03 Texas Instruments Incorporated 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
WO1987002529A1 (en) * 1985-10-18 1987-04-23 Radice Peter F Pyroelectric keyboard
FR2597988A1 (fr) * 1986-04-25 1987-10-30 Souloumiac Alain Amelioration des claviers optiques a balayage matriciel
DE3700856A1 (de) * 1987-01-14 1988-07-28 Telefunken Electronic Gmbh Optoelektronische tastatur
WO1989001720A1 (en) * 1987-08-21 1989-02-23 Pennwalt Corporation Pyroelectric keyboard
DE4109517A1 (de) * 1991-03-22 1992-09-24 Holger Guenther Dr Frenzel Tastatur
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)

* Cited by examiner, † Cited by third party
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

Also Published As

Publication number Publication date
AU4534579A (en) 1979-09-27
ES478865A1 (es) 1979-06-01
NO790937L (no) 1979-09-25
IT1166668B (it) 1987-05-06
BR7901789A (pt) 1979-11-20
DK120379A (da) 1979-09-25
FI790943A7 (fi) 1979-09-25
EP0004520A1 (fr) 1979-10-03
JPS54128629A (en) 1979-10-05

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