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GB1420581A - Pressure sensitive devices - Google Patents

Pressure sensitive devices

Info

Publication number
GB1420581A
GB1420581A GB598274*[A GB598274A GB1420581A GB 1420581 A GB1420581 A GB 1420581A GB 598274 A GB598274 A GB 598274A GB 1420581 A GB1420581 A GB 1420581A
Authority
GB
United Kingdom
Prior art keywords
conductors
cross
point
row
array
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
GB598274*[A
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.)
BAE Systems Electronics Ltd
Original Assignee
Marconi Co Ltd
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 Marconi Co Ltd filed Critical Marconi Co Ltd
Priority to GB598274*[A priority Critical patent/GB1420581A/en
Publication of GB1420581A publication Critical patent/GB1420581A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0414—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using force sensing means to determine a position
    • G06F3/04144—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using force sensing means to determine a position using an array of force sensing means

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics And Detection Of Objects (AREA)

Abstract

1420581 Selective signalling; pattern recognition MARCONI CO Ltd 4 Nov 1974 [8 Feb 1974] 05982/74 Headings G4H and G4R [Also in Division H3] A pressure-sensitive device comprises a sheet of plastics material having a first array of electrical conductors on one large area surface in crossing relationship with a second array of conductors on the other large area surface to provide a plurality of cross-over points, the plastics sheet being electrically poled at least in the regions of the cross-over points whereby pressure applied at a cross-over point provides an electrical signal on at least one of the two conductors crossing at that point. As disclosed, the plastics material is polyvinylidene fluoride. In a first embodiment, pressing a cross-point produces a signal on a row conductor and a column conductor through respective thresholding amplifiers, these signals being encoded. The device may be used to select an item on a computer display, or provide map references. A second embodiment, which can also be used in recognition of signatures or written characters by feeding a computer or display, has the row conductors each made of two dissimilar thin films to provide a diode at each cross-point. The column conductors are scanned by being connected to earth in turn (those not so connected being connected to a negative source to back-bias the diodes), outputs being taken via amplifiers from the row conductors.
GB598274*[A 1974-02-08 1974-02-08 Pressure sensitive devices Expired GB1420581A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB598274*[A GB1420581A (en) 1974-02-08 1974-02-08 Pressure sensitive devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB598274*[A GB1420581A (en) 1974-02-08 1974-02-08 Pressure sensitive devices

Publications (1)

Publication Number Publication Date
GB1420581A true GB1420581A (en) 1976-01-07

Family

ID=9806249

Family Applications (1)

Application Number Title Priority Date Filing Date
GB598274*[A Expired GB1420581A (en) 1974-02-08 1974-02-08 Pressure sensitive devices

Country Status (1)

Country Link
GB (1) GB1420581A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2309988A1 (en) * 1975-05-02 1976-11-26 Kureha Chemical Ind Co Ltd SWITCH MATRIX
US4258356A (en) 1978-04-03 1981-03-24 Scm Corporation Multi bar encoding apparatus utilizing acoustic energy
GB2117154A (en) * 1982-03-17 1983-10-05 Nigel Geoffrey Ley Hand-written character recognition device
GB2175426A (en) * 1985-04-01 1986-11-26 Yiping Jin A real time input device for handwritten chinese characters
GB2182179A (en) * 1985-10-24 1987-05-07 Wah Shing Whole-character keyboard
USRE32419E (en) * 1981-03-16 1987-05-12 Engineering Research Applications, Inc. Molded keyboard and method of fabricating same
GB2199433A (en) * 1986-12-23 1988-07-06 De La Rue Syst Force monitoring system
GB2235802A (en) * 1989-09-08 1991-03-13 Nat Res Dev Capturing information in drawing or writing

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2309988A1 (en) * 1975-05-02 1976-11-26 Kureha Chemical Ind Co Ltd SWITCH MATRIX
US4258356A (en) 1978-04-03 1981-03-24 Scm Corporation Multi bar encoding apparatus utilizing acoustic energy
USRE32419E (en) * 1981-03-16 1987-05-12 Engineering Research Applications, Inc. Molded keyboard and method of fabricating same
GB2117154A (en) * 1982-03-17 1983-10-05 Nigel Geoffrey Ley Hand-written character recognition device
GB2175426A (en) * 1985-04-01 1986-11-26 Yiping Jin A real time input device for handwritten chinese characters
GB2182179A (en) * 1985-10-24 1987-05-07 Wah Shing Whole-character keyboard
GB2199433A (en) * 1986-12-23 1988-07-06 De La Rue Syst Force monitoring system
GB2235802A (en) * 1989-09-08 1991-03-13 Nat Res Dev Capturing information in drawing or writing

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee