ES8404247A1 - Un dispositivo de teclado de contacto electronico. - Google Patents

Un dispositivo de teclado de contacto electronico.

Info

Publication number
ES8404247A1
ES8404247A1 ES522545A ES522545A ES8404247A1 ES 8404247 A1 ES8404247 A1 ES 8404247A1 ES 522545 A ES522545 A ES 522545A ES 522545 A ES522545 A ES 522545A ES 8404247 A1 ES8404247 A1 ES 8404247A1
Authority
ES
Spain
Prior art keywords
switches
key
electrically connected
key rollover
switch
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.)
Expired
Application number
ES522545A
Other languages
English (en)
Other versions
ES522545A0 (es
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
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 International Business Machines Corp filed Critical International Business Machines Corp
Publication of ES8404247A1 publication Critical patent/ES8404247A1/es
Publication of ES522545A0 publication Critical patent/ES522545A0/es
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M11/00—Coding in connection with keyboards or like devices, i.e. coding of the position of operated keys
    • H03M11/003—Phantom keys detection and prevention
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M11/00—Coding in connection with keyboards or like devices, i.e. coding of the position of operated keys
    • H03M11/02—Details

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Input From Keyboards Or The Like (AREA)
  • Electronic Switches (AREA)

Abstract

TECLADO ELECTRONICO DE CONTACTO.DISPONE DE TECLAS SENSIBLES AL TACTO, CADA UNA DE ELLAS ASOCIADA A UN INTERRUPTOR DE CONTACTO. EL CONJUNTO DE INTERRUPTORES (37) DEL TECLADO ESTA DISPUESTO COMO MATRIZ DE INTERCONEXION ELECTRICA DE VARIAS FILAS A UNA LINEA DE ACTIVACION DE COLUMNAS. CUANDO UN SOLO DEDO (14) PULSA POR ERROR SIMULTANEAMENTE VARIAS TECLAS, UN MICROPROCESADOR (25) BLOQUEA LA FUNCION DE PERCEPCION DE LAS MISMAS.
ES522545A 1982-05-20 1983-05-19 Un dispositivo de teclado de contacto electronico. Granted ES522545A0 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US38038682A 1982-05-20 1982-05-20

Publications (2)

Publication Number Publication Date
ES8404247A1 true ES8404247A1 (es) 1984-05-01
ES522545A0 ES522545A0 (es) 1984-05-01

Family

ID=23500976

Family Applications (1)

Application Number Title Priority Date Filing Date
ES522545A Granted ES522545A0 (es) 1982-05-20 1983-05-19 Un dispositivo de teclado de contacto electronico.

Country Status (4)

Country Link
EP (1) EP0095023A3 (es)
JP (1) JPS58211236A (es)
AU (1) AU1360583A (es)
ES (1) ES522545A0 (es)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6132127A (ja) * 1984-07-24 1986-02-14 Alps Electric Co Ltd キーボードのキーコード出力装置
NZ214078A (en) * 1984-11-10 1988-08-30 Int Computers Ltd Keyboard subset powered by standby source during mains failure
GB2221071B (en) * 1988-07-04 1992-08-19 Devlin Electronics Ltd Improvements in electronic keyboards

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3428747A (en) * 1965-03-22 1969-02-18 Nicholas Alferieff Man to machine communication keyboard device
US3308918A (en) * 1965-09-20 1967-03-14 Ibm Pseudo-interlock employing strobe signal with selected keys
GB1082426A (en) * 1966-05-05 1967-09-06 Ibm Interlock circuit
BE791475A (fr) * 1971-11-17 1973-05-16 Philips Nv Clavier permettant la commande des touches d'une maniere liee
US4106011A (en) * 1975-10-24 1978-08-08 Tektronix, Inc. Keyboard circuit
JPS55105730A (en) * 1979-02-05 1980-08-13 Omron Tateisi Electronics Co Deyboard encoder
JPS58161026A (ja) * 1982-03-19 1983-09-24 Hitachi Ltd 入力装置

Also Published As

Publication number Publication date
AU1360583A (en) 1983-11-24
EP0095023A3 (en) 1985-04-10
EP0095023A2 (en) 1983-11-30
JPS58211236A (ja) 1983-12-08
ES522545A0 (es) 1984-05-01

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Legal Events

Date Code Title Description
FD1A Patent lapsed

Effective date: 19970401