JPS5794833A - Detecting circuit of position information - Google Patents

Detecting circuit of position information

Info

Publication number
JPS5794833A
JPS5794833A JP55171271A JP17127180A JPS5794833A JP S5794833 A JPS5794833 A JP S5794833A JP 55171271 A JP55171271 A JP 55171271A JP 17127180 A JP17127180 A JP 17127180A JP S5794833 A JPS5794833 A JP S5794833A
Authority
JP
Japan
Prior art keywords
detection signal
optical detection
effective
timing
position information
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.)
Pending
Application number
JP55171271A
Other languages
Japanese (ja)
Inventor
Hirotsugu Kinoshita
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP55171271A priority Critical patent/JPS5794833A/en
Publication of JPS5794833A publication Critical patent/JPS5794833A/en
Pending 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
    • G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
    • G06F3/038—Control and interface arrangements therefor, e.g. drivers or device-embedded control circuitry
    • G06F3/0383—Signal control means within the pointing device

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)
  • Position Input By Displaying (AREA)

Abstract

PURPOSE:To assure the stable operation regardless of a shift of the set timing without any effect of scattered light, etc. and to increase the reliability, by avoiding making the data effective unless the optical detection signal is consequentively supplied in substantially equal timing. CONSTITUTION:Position information is set to a register 2 with the optical detection signal of a light pen 1. Both upper and lower limit timing generating circuits 6 and 7 are driven by the optical detection signal to produce the upper and lower limit timings 10 and 11 that set an allowance range 13 of + or -DELTAt to the reference time (t) during which the optical detection signal is delivered again. When the optical detection signal is delivered again within the range 13, this signal is decided effective. Thus a flip-flop 3 is set via a set pulse gate 8, and a light pen flag 12 is turned on. Then the data of a register 2 is turned effective as the information of the position designated by the pen 1.
JP55171271A 1980-12-04 1980-12-04 Detecting circuit of position information Pending JPS5794833A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55171271A JPS5794833A (en) 1980-12-04 1980-12-04 Detecting circuit of position information

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55171271A JPS5794833A (en) 1980-12-04 1980-12-04 Detecting circuit of position information

Publications (1)

Publication Number Publication Date
JPS5794833A true JPS5794833A (en) 1982-06-12

Family

ID=15920226

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55171271A Pending JPS5794833A (en) 1980-12-04 1980-12-04 Detecting circuit of position information

Country Status (1)

Country Link
JP (1) JPS5794833A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02156323A (en) * 1988-12-09 1990-06-15 Hitachi Ltd Light pen malfunction prevention method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02156323A (en) * 1988-12-09 1990-06-15 Hitachi Ltd Light pen malfunction prevention method

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