CA2062133A1 - Pulsed pen for use with a digitizer tablet - Google Patents

Pulsed pen for use with a digitizer tablet

Info

Publication number
CA2062133A1
CA2062133A1 CA2062133A CA2062133A CA2062133A1 CA 2062133 A1 CA2062133 A1 CA 2062133A1 CA 2062133 A CA2062133 A CA 2062133A CA 2062133 A CA2062133 A CA 2062133A CA 2062133 A1 CA2062133 A1 CA 2062133A1
Authority
CA
Canada
Prior art keywords
pen
tablet
state information
pulses
circuitry
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.)
Granted
Application number
CA2062133A
Other languages
French (fr)
Other versions
CA2062133C (en
Inventor
Gregory F. Russell
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 CA2062133A1 publication Critical patent/CA2062133A1/en
Application granted granted Critical
Publication of CA2062133C publication Critical patent/CA2062133C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR 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
    • G06F3/046—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by electromagnetic means

Abstract

An inductive pen (16) repetitively transmits pulses of an oscillatory signal having a characterisitic frequency.
Pen state information, such as pen tip contact switch information, are encoded by a number of techniques. These techniques include pulse width modulation or pulse position modulation, so as to convey pen state information to a digitizing tablet in a manner that does not adversely affect pen position determinations. The pen state information may also be encoded on the oscillating signal by Frequency Shift Keying (FSK), Phase Shift Keying (PSK), or Amplitude Modulation (AM). A digitizer tablet (10) includes circuitry for detecting the transmitted pen state information, the circuitry accommodating the selected modulation scheme. The tablet is responsive to the transmitted pulses for placing tablet circuitry in a low-power consumption state between pulses so as to conserve tablet power.
CA002062133A 1991-05-06 1992-03-02 Pulsed pen for use with a digitizer tablet Expired - Fee Related CA2062133C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/695,877 1991-05-06
US07/695,877 US5138118A (en) 1991-05-06 1991-05-06 Pulsed pen for use with a digitizer tablet

Publications (2)

Publication Number Publication Date
CA2062133A1 true CA2062133A1 (en) 1992-11-07
CA2062133C CA2062133C (en) 1996-01-16

Family

ID=24794803

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002062133A Expired - Fee Related CA2062133C (en) 1991-05-06 1992-03-02 Pulsed pen for use with a digitizer tablet

Country Status (5)

Country Link
US (1) US5138118A (en)
EP (1) EP0513559B1 (en)
JP (1) JPH05119908A (en)
CA (1) CA2062133C (en)
DE (1) DE69226002T2 (en)

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Also Published As

Publication number Publication date
CA2062133C (en) 1996-01-16
DE69226002T2 (en) 1999-02-18
EP0513559B1 (en) 1998-06-24
US5138118A (en) 1992-08-11
DE69226002D1 (en) 1998-07-30
EP0513559A2 (en) 1992-11-19
EP0513559A3 (en) 1993-07-28
JPH05119908A (en) 1993-05-18

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