JPS562038A - Coordinate input unit - Google Patents

Coordinate input unit

Info

Publication number
JPS562038A
JPS562038A JP7793679A JP7793679A JPS562038A JP S562038 A JPS562038 A JP S562038A JP 7793679 A JP7793679 A JP 7793679A JP 7793679 A JP7793679 A JP 7793679A JP S562038 A JPS562038 A JP S562038A
Authority
JP
Japan
Prior art keywords
line
signal
light
input
light pen
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
JP7793679A
Other languages
Japanese (ja)
Inventor
Shoji Onuma
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP7793679A priority Critical patent/JPS562038A/en
Publication of JPS562038A publication Critical patent/JPS562038A/en
Pending legal-status Critical Current

Links

Landscapes

  • Position Input By Displaying (AREA)

Abstract

PURPOSE: To obtain an inexpensive coordinate input unit of light pen control that is never influenced by external-light shadows, by detecting and processing at least two or more input signals while the 1st signal of a light pen is being input.
CONSTITUTION: With the operation switch of a light pen pushed, a switch signal from line 12 and a photo detection signal from line 11 are input to AND gate 1, the output of which sets FF2. The 2nd pulse signal from line 11 triggers monostable multivibrator 4, the operation time of which is set by the time constant of resistance R and capacitor C, and when the operation of monostable multivibrator 4 ends, line 15 is sensed. When no signal arrives from line 15, display data on a normal screen are considered to have been pointed out and FF6 is set to set coordinate values by the Q output of FF6. Since detected light lasts for a long time in case of external light, etc., the detection signal is sent out in sense operation by multivibrator 4 and FF6 is not set, so that no influence of afterglow will be exerted.
COPYRIGHT: (C)1981,JPO&Japio
JP7793679A 1979-06-20 1979-06-20 Coordinate input unit Pending JPS562038A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7793679A JPS562038A (en) 1979-06-20 1979-06-20 Coordinate input unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7793679A JPS562038A (en) 1979-06-20 1979-06-20 Coordinate input unit

Publications (1)

Publication Number Publication Date
JPS562038A true JPS562038A (en) 1981-01-10

Family

ID=13647956

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7793679A Pending JPS562038A (en) 1979-06-20 1979-06-20 Coordinate input unit

Country Status (1)

Country Link
JP (1) JPS562038A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5872237A (en) * 1981-10-27 1983-04-30 Hitachi Ltd Picture element detecting device using light pen

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5872237A (en) * 1981-10-27 1983-04-30 Hitachi Ltd Picture element detecting device using light pen
JPH0315769B2 (en) * 1981-10-27 1991-03-01 Hitachi Ltd

Similar Documents

Publication Publication Date Title
JPS5345120A (en) Video special effect device
JPS562038A (en) Coordinate input unit
JPS5377199A (en) Fire detector
JPS53148329A (en) Tablet input unit
JPS5647299A (en) Trouble detecting device of a press
JPS5644977A (en) Pattern information input system
JPS5456719A (en) Detection system for code signal featuring specified pattern
JPS564834A (en) Photo detection control system by light pen
JPS53101953A (en) Data processor
JPS53109456A (en) Interrupt control unit for data processing unit
JPS5617430A (en) Malfunction prevention system of light-pen detecting circuit
JPS5687208A (en) Data section extracting circuit in reproducing device of video format pcm signal
JPS5757383A (en) Handwriting detecting device
JPS51150239A (en) Page input unit
JPS5452427A (en) Detection precessing system for pattern region
JPS5464949A (en) Bus-system digital input device
JPS5617422A (en) Interruption control system of information processor
JPS57157360A (en) Mis-operation detecting system for data
JPS5357824A (en) Camera provided with setting device of film sensitivity
JPS5696320A (en) Light pen detecting system
JPS5236933A (en) Pen input device
JPS5423832A (en) Detecting system of air-fuel ratio control device
JPS5422137A (en) Bus line chekcing device
JPS538173A (en) Peak point detection circuit
JPS53116186A (en) Temperature display device of electronic range