JPS55988A - Light pen - Google Patents
Light penInfo
- 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
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
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)
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 |
-
1979
- 1979-03-28 JP JP3561379A patent/JPS55988A/en active Pending
Cited By (3)
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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