JPS62243022A - Coordinate reader - Google Patents

Coordinate reader

Info

Publication number
JPS62243022A
JPS62243022A JP61087646A JP8764686A JPS62243022A JP S62243022 A JPS62243022 A JP S62243022A JP 61087646 A JP61087646 A JP 61087646A JP 8764686 A JP8764686 A JP 8764686A JP S62243022 A JPS62243022 A JP S62243022A
Authority
JP
Japan
Prior art keywords
coordinate
position
indicator
angle
light receiving
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
JP61087646A
Inventor
Katsuhiro Konno
Shigeki Mochizuki
Original Assignee
Seiko Instr & Electronics 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 Seiko Instr & Electronics Ltd filed Critical Seiko Instr & Electronics Ltd
Priority to JP61087646A priority Critical patent/JPS62243022A/en
Publication of JPS62243022A publication Critical patent/JPS62243022A/en
Application status is Pending legal-status Critical

Links

Abstract

PURPOSE: To detect a coordinate position with a high accuracy, by combining a substrate which has provided a light receiving element on the outside periphery, and a coordinate indicator for radiating a light beam at a prescribed angle.
CONSTITUTION: As for a light emitting element driving circuit 1 which has been connected to a coordinate indicator 11, light beams of (a)W(d) which have been emitted from a light emitting element 12 driven by an input signal (IS) of a switch, etc. which are not shown in the figure and have been reflected by a reflecting lens 14 are sent to light receiving elements 6a, 6b. In this case, (a) and (b) generate an electromotive force in A and B of the light receiving element 6a at an angle of θ1. In the same way, (c) and (d) also generate an electromotive force in C and D of the light receiving element 6b at an angle of θ2. It is inputted to a coordinate arithmetic circuit 4 through a comparator, a position of a coordinate indicator on a position detecting plate is calculated, and a coordinate position is outputted to an external equipment. As for the position, a circle C1 inscribed by a triangle in which the top and the base are an indicator E, and A and B, respectively, at the angle θ1, and a circle C2 inscribed by a triangle in which the top and the base are the indicator E, and C and D, respectively can be supposed. In this way, an intersection E of two circles corresponds to a position of the coordinate indicator. In this way, the coordinate position can be detected with a high accuracy.
COPYRIGHT: (C)1987,JPO&Japio
JP61087646A 1986-04-16 1986-04-16 Coordinate reader Pending JPS62243022A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP61087646A JPS62243022A (en) 1986-04-16 1986-04-16 Coordinate reader

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP61087646A JPS62243022A (en) 1986-04-16 1986-04-16 Coordinate reader

Publications (1)

Publication Number Publication Date
JPS62243022A true JPS62243022A (en) 1987-10-23

Family

ID=13920738

Family Applications (1)

Application Number Title Priority Date Filing Date
JP61087646A Pending JPS62243022A (en) 1986-04-16 1986-04-16 Coordinate reader

Country Status (1)

Country Link
JP (1) JPS62243022A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7268774B2 (en) 1998-08-18 2007-09-11 Candledragon, Inc. Tracking motion of a writing instrument

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7268774B2 (en) 1998-08-18 2007-09-11 Candledragon, Inc. Tracking motion of a writing instrument

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