JPS5719885A - Coordinate detector using elastic wave - Google Patents

Coordinate detector using elastic wave

Info

Publication number
JPS5719885A
JPS5719885A JP9293780A JP9293780A JPS5719885A JP S5719885 A JPS5719885 A JP S5719885A JP 9293780 A JP9293780 A JP 9293780A JP 9293780 A JP9293780 A JP 9293780A JP S5719885 A JPS5719885 A JP S5719885A
Authority
JP
Japan
Prior art keywords
threshold value
elastic wave
pen
wave
plate wave
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
JP9293780A
Other languages
Japanese (ja)
Other versions
JPS5816509B2 (en
Inventor
Akira Ishii
Shinichiro Hashimoto
Toru Kitagawa
Munetada Kazama
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.)
Nippon Telegraph and Telephone Corp
Oki Electric Industry Co Ltd
Original Assignee
Nippon Telegraph and Telephone Corp
Oki Electric Industry 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 Nippon Telegraph and Telephone Corp, Oki Electric Industry Co Ltd filed Critical Nippon Telegraph and Telephone Corp
Priority to JP55092937A priority Critical patent/JPS5816509B2/en
Publication of JPS5719885A publication Critical patent/JPS5719885A/en
Publication of JPS5816509B2 publication Critical patent/JPS5816509B2/en
Expired 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
    • G06F3/033—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)
  • Length Measuring Devices Characterised By Use Of Acoustic Means (AREA)

Abstract

PURPOSE:To compare an output from a generator with an elastic wave detecting signal to make the detection of an input pen position and a pen down detection easy by providing with a threshold value generating means that generates a threshold value that is attenuated exponentially along with delay time in conformity with attenuation characteristics of a plate wave elastic wave. CONSTITUTION:Delay time from an emitting position of a plate wave elastic wave to a detecting position of an input pen is counted and a circuit that generates delay time in conformity with attenuation characteristics of the plate wave elastic wave along with a coordinates detecting region that attenuates exponentially is prepared in a processing circuit for a detected signal threshold value in a coordinates detector that detects coordinates of an input pen position. This circuit connects a discharge time constant CR to a collector and a power source E is connected to an emitter and thus they are made to be a discharge circuit by a transistor to a base of which an input Vci is added. Further, by permitting attenuation characteristics of the plate wave to coincide with a reciprocal of a discharge time constant CR, by making a relation between amplitude of a detected signal of the plate wave and a threshold value constant and by comparing it with the detected signal, a detection of pen position and of pen-down are made to be easy.
JP55092937A 1980-07-07 1980-07-07 Coordinate detection device using elastic waves Expired JPS5816509B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55092937A JPS5816509B2 (en) 1980-07-07 1980-07-07 Coordinate detection device using elastic waves

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55092937A JPS5816509B2 (en) 1980-07-07 1980-07-07 Coordinate detection device using elastic waves

Publications (2)

Publication Number Publication Date
JPS5719885A true JPS5719885A (en) 1982-02-02
JPS5816509B2 JPS5816509B2 (en) 1983-03-31

Family

ID=14068387

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55092937A Expired JPS5816509B2 (en) 1980-07-07 1980-07-07 Coordinate detection device using elastic waves

Country Status (1)

Country Link
JP (1) JPS5816509B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6314222A (en) * 1986-07-04 1988-01-21 Canon Inc Coordinate input device
JPS63104122A (en) * 1986-10-22 1988-05-09 Canon Inc Coordinate input device
JPS63118824A (en) * 1986-11-07 1988-05-23 Canon Inc Coordinate input device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0844485A (en) 1994-07-29 1996-02-16 Canon Inc Coordinate input device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6314222A (en) * 1986-07-04 1988-01-21 Canon Inc Coordinate input device
JPS63104122A (en) * 1986-10-22 1988-05-09 Canon Inc Coordinate input device
JPH0648456B2 (en) * 1986-10-22 1994-06-22 キヤノン株式会社 Coordinate input device
JPS63118824A (en) * 1986-11-07 1988-05-23 Canon Inc Coordinate input device

Also Published As

Publication number Publication date
JPS5816509B2 (en) 1983-03-31

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