JPS5696320A - Light pen detecting system - Google Patents

Light pen detecting system

Info

Publication number
JPS5696320A
JPS5696320A JP17318179A JP17318179A JPS5696320A JP S5696320 A JPS5696320 A JP S5696320A JP 17318179 A JP17318179 A JP 17318179A JP 17318179 A JP17318179 A JP 17318179A JP S5696320 A JPS5696320 A JP S5696320A
Authority
JP
Japan
Prior art keywords
light pen
areas
marker
generated
detecting system
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
JP17318179A
Other languages
Japanese (ja)
Inventor
Katsunobu Noda
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP17318179A priority Critical patent/JPS5696320A/en
Publication of JPS5696320A publication Critical patent/JPS5696320A/en
Pending legal-status Critical Current

Links

Landscapes

  • Position Input By Displaying (AREA)

Abstract

PURPOSE: To prevent the erroneous detection caused by the delay of the detection signal from a light pen, by dividing the areas, which can be detected by the light pen and exist continuously, into plural sections and by processing them.
CONSTITUTION: Attribute characters indicating light pen detectable areas which are indicated by A1WA13 are provided on display 10. In the first frame, the control is so performed that the light pen marker is generated in odd areas A1WA2, A3WA4, A5WA6.... In the next frame, the control is so performed that the marker is generated in even areas A2WA3, A4WA5.... Consequently, when the character displayed between A1 and A2 in the area of A1WA2 very near to A2 is detected by the light pen, the processor discriminates that the marker is not generated between A2 and A3, thereby preventing the erroneous detection of the light pen detection area.
COPYRIGHT: (C)1981,JPO&Japio
JP17318179A 1979-12-28 1979-12-28 Light pen detecting system Pending JPS5696320A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17318179A JPS5696320A (en) 1979-12-28 1979-12-28 Light pen detecting system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17318179A JPS5696320A (en) 1979-12-28 1979-12-28 Light pen detecting system

Publications (1)

Publication Number Publication Date
JPS5696320A true JPS5696320A (en) 1981-08-04

Family

ID=15955585

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17318179A Pending JPS5696320A (en) 1979-12-28 1979-12-28 Light pen detecting system

Country Status (1)

Country Link
JP (1) JPS5696320A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0381426A2 (en) * 1989-02-01 1990-08-08 International Business Machines Corporation Apparatus for determining the position of a light pen on a display device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0381426A2 (en) * 1989-02-01 1990-08-08 International Business Machines Corporation Apparatus for determining the position of a light pen on a display device
US5134389A (en) * 1989-02-01 1992-07-28 International Business Machines Corporation Display terminal device

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