JPS5556230A - Coordinate detector - Google Patents

Coordinate detector

Info

Publication number
JPS5556230A
JPS5556230A JP12833178A JP12833178A JPS5556230A JP S5556230 A JPS5556230 A JP S5556230A JP 12833178 A JP12833178 A JP 12833178A JP 12833178 A JP12833178 A JP 12833178A JP S5556230 A JPS5556230 A JP S5556230A
Authority
JP
Japan
Prior art keywords
ring counter
output
pen
loop
loops
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
JP12833178A
Other languages
Japanese (ja)
Inventor
Hiroshi Fujio
Yoichi Ueishi
Takeshi Yamaguchi
Toshiyuki Makino
Yoichi Hamanaka
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.)
Via Mechanics Ltd
Original Assignee
Hitachi Seiko 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 Hitachi Seiko Ltd filed Critical Hitachi Seiko Ltd
Priority to JP12833178A priority Critical patent/JPS5556230A/en
Publication of JPS5556230A publication Critical patent/JPS5556230A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To realize a coordinate detector which detects a position indicated by a signal generator, by detecting the fixed number of repetitive signals from repetitive signal generators by detectors arranged on a tablet confronting above-mentioned generators.
CONSTITUTION: When an output appears at only Dr, for example, of ring counter 8, Br and Cr of analog switch 7 are both closed to form a loop of conductors (lr) and (lr+1). If pen 6 resides in this loop, the output of amplifier 9 increases in accordance with output Dr and is pulse-converted by voltage comparator 11 and counted 12, thereby performing fixed coordinate detection 4 in consideration of a start point of ring counter 8. Ring counter 8 forms loops in sequence, but when pen 6 does not reside in loops, outputs are zero or extermely small and corrdinate detection operation tolerant of external noises is performed.
COPYRIGHT: (C)1980,JPO&Japio
JP12833178A 1978-10-20 1978-10-20 Coordinate detector Pending JPS5556230A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12833178A JPS5556230A (en) 1978-10-20 1978-10-20 Coordinate detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12833178A JPS5556230A (en) 1978-10-20 1978-10-20 Coordinate detector

Publications (1)

Publication Number Publication Date
JPS5556230A true JPS5556230A (en) 1980-04-24

Family

ID=14982138

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12833178A Pending JPS5556230A (en) 1978-10-20 1978-10-20 Coordinate detector

Country Status (1)

Country Link
JP (1) JPS5556230A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59139488A (en) * 1983-01-31 1984-08-10 Nippon Telegr & Teleph Corp <Ntt> Electromagnetic induction type digitizer
JPS6378221A (en) * 1986-09-22 1988-04-08 Toshiba Corp Coordinate input device
US5138118A (en) * 1991-05-06 1992-08-11 International Business Machines Corporation Pulsed pen for use with a digitizer tablet

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5148929A (en) * 1974-10-25 1976-04-27 Fujitsu Ltd
JPS5171031A (en) * 1974-12-17 1976-06-19 Omron Tateisi Electronics Co

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5148929A (en) * 1974-10-25 1976-04-27 Fujitsu Ltd
JPS5171031A (en) * 1974-12-17 1976-06-19 Omron Tateisi Electronics Co

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59139488A (en) * 1983-01-31 1984-08-10 Nippon Telegr & Teleph Corp <Ntt> Electromagnetic induction type digitizer
JPH0437448B2 (en) * 1983-01-31 1992-06-19 Nippon Telegraph & Telephone
JPS6378221A (en) * 1986-09-22 1988-04-08 Toshiba Corp Coordinate input device
JPH0519168B2 (en) * 1986-09-22 1993-03-16 Tokyo Shibaura Electric Co
US5138118A (en) * 1991-05-06 1992-08-11 International Business Machines Corporation Pulsed pen for use with a digitizer tablet

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