JPS55988A - Light pen - Google Patents

Light pen

Info

Publication number
JPS55988A
JPS55988A JP3561379A JP3561379A JPS55988A JP S55988 A JPS55988 A JP S55988A JP 3561379 A JP3561379 A JP 3561379A JP 3561379 A JP3561379 A JP 3561379A JP S55988 A JPS55988 A JP S55988A
Authority
JP
Japan
Prior art keywords
pen
light
enclosure
projecting
slit
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
JP3561379A
Other languages
Japanese (ja)
Inventor
Shinichi Yamada
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP3561379A priority Critical patent/JPS55988A/en
Publication of JPS55988A publication Critical patent/JPS55988A/en
Pending legal-status Critical Current

Links

Landscapes

  • Position Input By Displaying (AREA)

Abstract

PURPOSE: To make the operation of a pen easy and accurate by providing a ringshaped slit encircling a photo detection window to the enclosure of the pen, by emitting light from a light emitting lamp through the slit and by projecting a maker for the pen on a CRT screen.
CONSTITUTION: Enclosure 3 of the pen is provided with a ring-shaped slit encircling the photo detection window, and light emitting lamp 7 emits the light of LED. Then, projecting the marker for the pen on CRT screen 2 results in the reduction of the fatigue of naked eyes and the positioning of the pen is prevented from varying with the position of eyes, so that the pen can be operated easily and definitely.
COPYRIGHT: (C)1980,JPO&Japio
JP3561379A 1979-03-28 1979-03-28 Light pen Pending JPS55988A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3561379A JPS55988A (en) 1979-03-28 1979-03-28 Light pen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3561379A JPS55988A (en) 1979-03-28 1979-03-28 Light pen

Publications (1)

Publication Number Publication Date
JPS55988A true JPS55988A (en) 1980-01-07

Family

ID=12446687

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3561379A Pending JPS55988A (en) 1979-03-28 1979-03-28 Light pen

Country Status (1)

Country Link
JP (1) JPS55988A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60153339U (en) * 1984-03-21 1985-10-12 シャープ株式会社 handwriting input device
JPH02131236A (en) * 1988-11-11 1990-05-21 Fuji Photo Film Co Ltd Photosensitive composition
JPH02173646A (en) * 1988-12-26 1990-07-05 Fuji Photo Film Co Ltd Photosensitive composition

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60153339U (en) * 1984-03-21 1985-10-12 シャープ株式会社 handwriting input device
JPH02131236A (en) * 1988-11-11 1990-05-21 Fuji Photo Film Co Ltd Photosensitive composition
JPH02173646A (en) * 1988-12-26 1990-07-05 Fuji Photo Film Co Ltd Photosensitive composition

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