IT989313B - Apparecchiatura e metodo per una tastiera a matrice - Google Patents
Apparecchiatura e metodo per una tastiera a matriceInfo
- Publication number
- IT989313B IT989313B IT25617/73A IT2561773A IT989313B IT 989313 B IT989313 B IT 989313B IT 25617/73 A IT25617/73 A IT 25617/73A IT 2561773 A IT2561773 A IT 2561773A IT 989313 B IT989313 B IT 989313B
- Authority
- IT
- Italy
- Prior art keywords
- equipment
- matrix keyboard
- keyboard
- matrix
- Prior art date
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
- H03M11/02—Details
-
- 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
- H03K17/975—Switches controlled by moving an element forming part of the switch using a capacitive movable element
- H03K17/98—Switches controlled by moving an element forming part of the switch using a capacitive movable element having a plurality of control members, e.g. keyboard
-
- 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
- H03M11/04—Coding of multifunction keys
- H03M11/14—Coding of multifunction keys by using additional keys, e.g. shift keys, which determine the function performed by the multifunction key
- H03M11/18—Coding of multifunction keys by using additional keys, e.g. shift keys, which determine the function performed by the multifunction key wherein the shift keys are operated before the operation of the multifunction keys
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Input From Keyboards Or The Like (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US27648472A | 1972-07-31 | 1972-07-31 |
Publications (1)
Publication Number | Publication Date |
---|---|
IT989313B true IT989313B (it) | 1975-05-20 |
Family
ID=23056837
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT25617/73A IT989313B (it) | 1972-07-31 | 1973-06-20 | Apparecchiatura e metodo per una tastiera a matrice |
Country Status (15)
Country | Link |
---|---|
US (1) | US3786497A (it) |
JP (2) | JPS5311325B2 (it) |
AT (1) | AT335201B (it) |
BE (1) | BE802440A (it) |
BR (1) | BR7305823D0 (it) |
CA (3) | CA981586A (it) |
CH (1) | CH551045A (it) |
DE (1) | DE2337670C3 (it) |
ES (1) | ES417400A1 (it) |
FR (1) | FR2195366A5 (it) |
GB (1) | GB1426602A (it) |
IL (1) | IL42706A (it) |
IT (1) | IT989313B (it) |
NL (1) | NL182350C (it) |
SE (1) | SE392355B (it) |
Families Citing this family (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3902054A (en) * | 1973-09-13 | 1975-08-26 | Texas Instruments Inc | Calculator system having keyboard with double entry protection and serialized encoding |
US3931610A (en) * | 1973-11-29 | 1976-01-06 | Teletype Corporation | Capacitive keyswitch sensor and method |
US3892915A (en) * | 1973-12-10 | 1975-07-01 | Transcripts Inc | Stenographic data recording apparatus and method |
US3928847A (en) * | 1974-02-04 | 1975-12-23 | Cpt Corp | Fast scan electronic circuit with contact bounce elimination for an automatic typing system keyboard |
JPS5415372B2 (it) * | 1974-10-08 | 1979-06-14 | ||
DE2536403C2 (de) * | 1975-08-14 | 1977-06-30 | Siemens AG, 1000 Berlin und 8000 München | Tastengesteuerte Anordnung zur Erzeugung von Codezeichen |
FR2332655A1 (fr) * | 1975-11-24 | 1977-06-17 | Xerox Corp | Clavier de codage anti-rebonds muni de touches de repetition |
US4037225A (en) * | 1975-11-25 | 1977-07-19 | Xerox Corporation | Keyboard encoding system with electronic hysteresis |
US4027306A (en) * | 1976-04-05 | 1977-05-31 | Richard Hackmeister | Touch-responsive circuit and data input terminal using same |
US4221975A (en) * | 1978-04-19 | 1980-09-09 | Touch Activated Switch Arrays, Inc. | Touch activated controller and method |
US4211915A (en) * | 1978-12-04 | 1980-07-08 | General Electric Company | Keyboard verification system |
US4274752A (en) * | 1979-04-02 | 1981-06-23 | International Business Machines Corporation | Keyboard multiple switch assembly |
US4305135A (en) * | 1979-07-30 | 1981-12-08 | International Business Machines Corp. | Program controlled capacitive keyboard variable threshold sensing system |
JPS63130515U (it) * | 1987-02-17 | 1988-08-26 | ||
JPH1185362A (ja) * | 1997-09-01 | 1999-03-30 | Nec Corp | キーボード制御方法およびキーボード制御装置 |
US6323445B1 (en) | 2000-04-28 | 2001-11-27 | Microsoft Corporation | Membrane switch structure providing electrostatic discharge protection |
US6577250B1 (en) | 2000-05-19 | 2003-06-10 | Microsoft Corporation | Resistance based keyboard key discrimination |
US6621484B1 (en) | 2000-06-27 | 2003-09-16 | Microsoft Corporation | Keyboard key discrimination based on time division multiplexing |
US6630927B2 (en) | 2001-02-15 | 2003-10-07 | Microsoft Corporation | Keyboard key discrimination employing drive line/sense line combinations and accomodating simultaneous key press conditions |
DE10257070B4 (de) * | 2002-12-06 | 2004-09-16 | Schott Glas | Verfahren zur automatischen Bestimmung einer gültigen oder ungültigen Tasteneingabe |
US8395395B2 (en) * | 2007-11-27 | 2013-03-12 | Azoteq (Pty) Ltd. | Noise rejection and parasitic capacitance removal implementations |
TWI402716B (zh) | 2010-02-04 | 2013-07-21 | Novatek Microelectronics Corp | 按鍵操作偵測系統與方法 |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US904008A (en) * | 1908-02-17 | 1908-11-17 | Fred Santware | Wrench. |
US3483553A (en) * | 1967-06-08 | 1969-12-09 | Scantlin Electronics Inc | Keyboard input system |
US3613054A (en) * | 1969-12-04 | 1971-10-12 | Sanders Associates Inc | Scanning encoder |
US3675240A (en) * | 1969-12-23 | 1972-07-04 | Bell Telephone Labor Inc | Keyboard encoding arrangement |
US3653038A (en) * | 1970-02-20 | 1972-03-28 | United Bank Of Denver National | Capacitive electric signal device and keyboard using said device |
US3651463A (en) * | 1970-04-17 | 1972-03-21 | Medidata Soiences Inc | Switch coding circuitry |
US3623082A (en) * | 1970-05-27 | 1971-11-23 | Clare & Co C P | Keyboard assembly |
US3662378A (en) * | 1970-06-01 | 1972-05-09 | Cherry Electrical Prod | Electronic keyboard input circuit |
US3675239A (en) * | 1970-09-14 | 1972-07-04 | Ncr Co | Unlimited roll keyboard circuit |
US3683371A (en) * | 1970-09-15 | 1972-08-08 | Burroughs Corp | Magnetic keyboard terminal |
US3716850A (en) * | 1971-12-21 | 1973-02-13 | Ibm | Synchronous detector for monopulse key sampling electronic keyboard |
US3715747A (en) * | 1971-12-30 | 1973-02-06 | Ibm | Capacitive keyboard electronics |
-
1972
- 1972-07-31 US US00276484A patent/US3786497A/en not_active Expired - Lifetime
-
1973
- 1973-06-12 CA CA173,853A patent/CA981586A/en not_active Expired
- 1973-06-20 IT IT25617/73A patent/IT989313B/it active
- 1973-06-26 JP JP7140273A patent/JPS5311325B2/ja not_active Expired
- 1973-07-04 GB GB3185373A patent/GB1426602A/en not_active Expired
- 1973-07-10 IL IL42706A patent/IL42706A/xx unknown
- 1973-07-12 FR FR7326407A patent/FR2195366A5/fr not_active Expired
- 1973-07-17 BE BE133564A patent/BE802440A/xx not_active IP Right Cessation
- 1973-07-25 DE DE2337670A patent/DE2337670C3/de not_active Expired
- 1973-07-26 AT AT660573A patent/AT335201B/de not_active IP Right Cessation
- 1973-07-26 SE SE7310377A patent/SE392355B/xx unknown
- 1973-07-26 CH CH1091573A patent/CH551045A/xx not_active IP Right Cessation
- 1973-07-30 NL NLAANVRAGE7310546,A patent/NL182350C/xx not_active IP Right Cessation
- 1973-07-30 ES ES417400A patent/ES417400A1/es not_active Expired
- 1973-07-31 BR BR5823/73A patent/BR7305823D0/pt unknown
-
1975
- 1975-04-08 JP JP4192275A patent/JPS5411215B2/ja not_active Expired
- 1975-09-05 CA CA235,131A patent/CA991996A/en not_active Expired
- 1975-09-05 CA CA235,132A patent/CA994920A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
CA991996A (en) | 1976-06-29 |
US3786497A (en) | 1974-01-15 |
IL42706A0 (en) | 1973-10-25 |
AU5814173A (en) | 1975-01-16 |
NL182350B (nl) | 1987-09-16 |
AT335201B (de) | 1977-02-25 |
NL182350C (nl) | 1988-02-16 |
JPS5411215B2 (it) | 1979-05-12 |
JPS514920A (it) | 1976-01-16 |
CA981586A (en) | 1976-01-13 |
ATA660573A (de) | 1976-06-15 |
ES417400A1 (es) | 1976-07-01 |
JPS5311325B2 (it) | 1978-04-20 |
DE2337670C3 (de) | 1975-06-12 |
CH551045A (de) | 1974-06-28 |
DE2337670A1 (de) | 1974-02-21 |
JPS4953730A (it) | 1974-05-24 |
BE802440A (fr) | 1973-11-16 |
GB1426602A (en) | 1976-03-03 |
SE392355B (sv) | 1977-03-21 |
BR7305823D0 (pt) | 1974-07-11 |
IL42706A (en) | 1975-11-25 |
CA994920A (en) | 1976-08-10 |
DE2337670B2 (de) | 1974-10-17 |
FR2195366A5 (it) | 1974-03-01 |
NL7310546A (it) | 1974-02-04 |
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