BR7901789A - Teclado optico de matriz e processo de operacao do mesmo - Google Patents

Teclado optico de matriz e processo de operacao do mesmo

Info

Publication number
BR7901789A
BR7901789A BR7901789A BR7901789A BR7901789A BR 7901789 A BR7901789 A BR 7901789A BR 7901789 A BR7901789 A BR 7901789A BR 7901789 A BR7901789 A BR 7901789A BR 7901789 A BR7901789 A BR 7901789A
Authority
BR
Brazil
Prior art keywords
operation process
optical matrix
matrix keyboard
keyboard
optical
Prior art date
Application number
BR7901789A
Other languages
English (en)
Inventor
J Dahl
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 BR7901789A publication Critical patent/BR7901789A/pt

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
BR7901789A 1978-03-24 1979-03-23 Teclado optico de matriz e processo de operacao do mesmo BR7901789A (pt)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
BR7901789A true BR7901789A (pt) 1979-11-20

Family

ID=25395741

Family Applications (1)

Application Number Title Priority Date Filing Date
BR7901789A BR7901789A (pt) 1978-03-24 1979-03-23 Teclado optico de matriz e processo de operacao do mesmo

Country Status (9)

Country Link
EP (1) EP0004520A1 (pt)
JP (1) JPS54128629A (pt)
AU (1) AU4534579A (pt)
BR (1) BR7901789A (pt)
DK (1) DK120379A (pt)
ES (1) ES478865A1 (pt)
FI (1) FI790943A (pt)
IT (1) IT1166668B (pt)
NO (1) NO790937L (pt)

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
AU2304888A (en) * 1987-08-21 1989-03-09 Pennwalt Corporation Pyroelectric keyboard
DE4109517A1 (de) * 1991-03-22 1992-09-24 Holger Guenther Dr Frenzel Tastatur
KR101745435B1 (ko) * 2015-02-27 2017-06-09 동 관 롱아이디얼 인더스트리얼 컴퍼니 리미티드 광전 일체형 기계축 키보드 스위치 모듈

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
DK120379A (da) 1979-09-25
IT1166668B (it) 1987-05-06
AU4534579A (en) 1979-09-27
NO790937L (no) 1979-09-25
EP0004520A1 (fr) 1979-10-03
JPS54128629A (en) 1979-10-05
IT7920570A0 (it) 1979-02-27
ES478865A1 (es) 1979-06-01
FI790943A (fi) 1979-09-25

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