JPS5236934A - Optical input device - Google Patents

Optical input device

Info

Publication number
JPS5236934A
JPS5236934A JP50113213A JP11321375A JPS5236934A JP S5236934 A JPS5236934 A JP S5236934A JP 50113213 A JP50113213 A JP 50113213A JP 11321375 A JP11321375 A JP 11321375A JP S5236934 A JPS5236934 A JP S5236934A
Authority
JP
Japan
Prior art keywords
input device
optical input
modulating
input signals
prevent erroneous
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
JP50113213A
Other languages
Japanese (ja)
Other versions
JPS597979B2 (en
Inventor
Wataru Sakagami
Hiroaki Miura
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP50113213A priority Critical patent/JPS597979B2/en
Publication of JPS5236934A publication Critical patent/JPS5236934A/en
Publication of JPS597979B2 publication Critical patent/JPS597979B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Input From Keyboards Or The Like (AREA)

Abstract

PURPOSE: To prevent erroneous inputs due to external lights by modulating the input signals for the light pen.
COPYRIGHT: (C)1977,JPO&Japio
JP50113213A 1975-09-19 1975-09-19 Kougakuniyuriyokusouchi Expired JPS597979B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP50113213A JPS597979B2 (en) 1975-09-19 1975-09-19 Kougakuniyuriyokusouchi

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP50113213A JPS597979B2 (en) 1975-09-19 1975-09-19 Kougakuniyuriyokusouchi

Publications (2)

Publication Number Publication Date
JPS5236934A true JPS5236934A (en) 1977-03-22
JPS597979B2 JPS597979B2 (en) 1984-02-22

Family

ID=14606421

Family Applications (1)

Application Number Title Priority Date Filing Date
JP50113213A Expired JPS597979B2 (en) 1975-09-19 1975-09-19 Kougakuniyuriyokusouchi

Country Status (1)

Country Link
JP (1) JPS597979B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4644341A (en) * 1984-07-05 1987-02-17 Tri-Tronics Company, Inc. Contrast indicating arrangement in photoelectric sensing systems
JPH0525U (en) * 1991-06-25 1993-01-08 株式会社クボタ Combine culm length detection structure

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4930375A (en) * 1970-06-23 1974-03-18
JPS50111930A (en) * 1974-02-12 1975-09-03

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4930375A (en) * 1970-06-23 1974-03-18
JPS50111930A (en) * 1974-02-12 1975-09-03

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4644341A (en) * 1984-07-05 1987-02-17 Tri-Tronics Company, Inc. Contrast indicating arrangement in photoelectric sensing systems
JPH0525U (en) * 1991-06-25 1993-01-08 株式会社クボタ Combine culm length detection structure

Also Published As

Publication number Publication date
JPS597979B2 (en) 1984-02-22

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