FI100142B - Sähkömagneettisia häiriöitä vähentävä näppäimistörakenne - Google Patents

Sähkömagneettisia häiriöitä vähentävä näppäimistörakenne

Info

Publication number
FI100142B
FI100142B FI956005A FI956005A FI100142B FI 100142 B FI100142 B FI 100142B FI 956005 A FI956005 A FI 956005A FI 956005 A FI956005 A FI 956005A FI 100142 B FI100142 B FI 100142B
Authority
FI
Finland
Prior art keywords
electromagnetic interference
keyboard structure
reduces electromagnetic
reduces
keyboard
Prior art date
Application number
FI956005A
Other languages
English (en)
Swedish (sv)
Other versions
FI956005A (fi
FI956005A0 (fi
Inventor
Kimmo Siitari
Hannu Haapakoski
Original Assignee
Nokia Display Products Oy
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 Nokia Display Products Oy filed Critical Nokia Display Products Oy
Priority to FI956005A priority Critical patent/FI100142B/fi
Publication of FI956005A0 publication Critical patent/FI956005A0/fi
Priority to EP96119396A priority patent/EP0779715A3/en
Publication of FI956005A publication Critical patent/FI956005A/fi
Application granted granted Critical
Publication of FI100142B publication Critical patent/FI100142B/fi

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
    • H03M11/22—Static coding
    • H03M11/24—Static coding using analogue means, e.g. by coding the states of multiple switches into a single multi-level analogue signal or by indicating the type of a device using the voltage level at a specific tap of a resistive divider
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
    • H01H13/702—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2239/00—Miscellaneous
    • H01H2239/004—High frequency adaptation or shielding
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2239/00—Miscellaneous
    • H01H2239/008—Static electricity considerations
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2239/00—Miscellaneous
    • H01H2239/01—Miscellaneous combined with other elements on the same substrate
    • H01H2239/012—Decoding impedances
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2239/00—Miscellaneous
    • H01H2239/018—Ground conductor

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Push-Button Switches (AREA)
  • Input From Keyboards Or The Like (AREA)
FI956005A 1995-12-14 1995-12-14 Sähkömagneettisia häiriöitä vähentävä näppäimistörakenne FI100142B (fi)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FI956005A FI100142B (fi) 1995-12-14 1995-12-14 Sähkömagneettisia häiriöitä vähentävä näppäimistörakenne
EP96119396A EP0779715A3 (en) 1995-12-14 1996-12-04 Keyboard structure for reducing electromagnetic interference

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI956005A FI100142B (fi) 1995-12-14 1995-12-14 Sähkömagneettisia häiriöitä vähentävä näppäimistörakenne

Publications (3)

Publication Number Publication Date
FI956005A0 FI956005A0 (fi) 1995-12-14
FI956005A FI956005A (fi) 1997-06-15
FI100142B true FI100142B (fi) 1997-09-30

Family

ID=8544545

Family Applications (1)

Application Number Title Priority Date Filing Date
FI956005A FI100142B (fi) 1995-12-14 1995-12-14 Sähkömagneettisia häiriöitä vähentävä näppäimistörakenne

Country Status (2)

Country Link
EP (1) EP0779715A3 (fi)
FI (1) FI100142B (fi)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6477274B1 (en) 1999-10-22 2002-11-05 Ericsson Inc. Handwritten character recognition devices and electronic devices incorporating same
SE522004C2 (sv) * 2001-05-09 2004-01-07 Comex Electronics Ab Förfarande och anordning för att minska förekomsten av röjande signaler från ett tangentbord
US7243851B2 (en) 2004-08-31 2007-07-17 Research In Motion Limited Mobile wireless communications device with reduced interfering energy from the keyboard
US7363063B2 (en) 2004-08-31 2008-04-22 Research In Motion Limited Mobile wireless communications device with reduced interference from the keyboard into the radio receiver
TWI324898B (en) 2004-11-23 2010-05-11 Qisda Corp Keyboard circuit with electrostatic discharge protection
FR2910652B1 (fr) * 2006-12-21 2009-04-24 Dav Sa Module de commande electrique, en particulier pour vehicule automobile
CN114035697B (zh) * 2021-11-26 2023-10-03 中国电子技术标准化研究院 一种低辐射抗电磁干扰的键盘鼠标模拟装置及方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2370348A1 (fr) * 1976-11-05 1978-06-02 Leveille Marc Contacteur matriciel pour affichage video notamment
GB2102626B (en) * 1981-07-21 1985-06-05 Standard Telephones Cables Ltd Contact dimple pad
US4725816A (en) * 1984-12-10 1988-02-16 John Fluke Mfg. Co., Inc. Matrix keyboard encoder circuit

Also Published As

Publication number Publication date
FI956005A (fi) 1997-06-15
FI956005A0 (fi) 1995-12-14
EP0779715A2 (en) 1997-06-18
EP0779715A3 (en) 1998-09-30

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Legal Events

Date Code Title Description
HC Name/ company changed in application

Owner name: NOKIA DISPLAY PRODUCTS OY