JPS578836A - Light pen device - Google Patents

Light pen device

Info

Publication number
JPS578836A
JPS578836A JP8354480A JP8354480A JPS578836A JP S578836 A JPS578836 A JP S578836A JP 8354480 A JP8354480 A JP 8354480A JP 8354480 A JP8354480 A JP 8354480A JP S578836 A JPS578836 A JP S578836A
Authority
JP
Japan
Prior art keywords
electric signal
time
crosses
eliminate
peak value
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
JP8354480A
Other languages
Japanese (ja)
Other versions
JPS594739B2 (en
Inventor
Naoki Igarashi
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.)
NEC Home Electronics Ltd
NEC Corp
Original Assignee
NEC Home Electronics Ltd
Nippon 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 NEC Home Electronics Ltd, Nippon Electric Co Ltd filed Critical NEC Home Electronics Ltd
Priority to JP55083544A priority Critical patent/JPS594739B2/en
Publication of JPS578836A publication Critical patent/JPS578836A/en
Publication of JPS594739B2 publication Critical patent/JPS594739B2/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
    • G06F3/0354—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor with detection of 2D relative movements between the device, or an operating part thereof, and a plane or surface, e.g. 2D mice, trackballs, pens or pucks
    • G06F3/03542—Light pens for emitting or receiving light

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)
  • Position Input By Displaying (AREA)

Abstract

PURPOSE:To achieve invariably stable and accurate position detection by equalizing the time when an electric signal rises and crosses a threshold level if the emitted light color of raster light is any one. CONSTITUTION:The 1st electric signal outputted from a photoelectric converting element 41 has a higher peak value than that of the 2nd electric signal outputted from a photoelectric converting element 42, and has a difference T in time when it rises and crosses its threshold level. Then, adjusting circuits 51 and 52 adjust the 1st and 2nd electric signals to eliminate the different T in time. For example, the 1st electric signal is amplified to nearly equalize its peak value to that of the 2nd electric signal and the leading edge is made steep to eliminate the different T in time. Consequently, the rising time of a signal containing a sequence of pulses is unrelated to emitted light color and the stable and accurate output is obtained.
JP55083544A 1980-06-20 1980-06-20 light pen device Expired JPS594739B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55083544A JPS594739B2 (en) 1980-06-20 1980-06-20 light pen device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55083544A JPS594739B2 (en) 1980-06-20 1980-06-20 light pen device

Publications (2)

Publication Number Publication Date
JPS578836A true JPS578836A (en) 1982-01-18
JPS594739B2 JPS594739B2 (en) 1984-01-31

Family

ID=13805444

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55083544A Expired JPS594739B2 (en) 1980-06-20 1980-06-20 light pen device

Country Status (1)

Country Link
JP (1) JPS594739B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007139030A (en) * 2005-11-16 2007-06-07 Mitsubishi Heavy Ind Ltd Shaft sealing structure for muddy water rotating device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007139030A (en) * 2005-11-16 2007-06-07 Mitsubishi Heavy Ind Ltd Shaft sealing structure for muddy water rotating device

Also Published As

Publication number Publication date
JPS594739B2 (en) 1984-01-31

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