JPS57178531A - Photodetector - Google Patents
PhotodetectorInfo
- Publication number
- JPS57178531A JPS57178531A JP56063417A JP6341781A JPS57178531A JP S57178531 A JPS57178531 A JP S57178531A JP 56063417 A JP56063417 A JP 56063417A JP 6341781 A JP6341781 A JP 6341781A JP S57178531 A JPS57178531 A JP S57178531A
- Authority
- JP
- Japan
- Prior art keywords
- shielding plate
- light
- introducing port
- photodetection
- image
- 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
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
Abstract
PURPOSE:To improve operability by preventing malfunction during operation by providing a shielding plate for light between a light introducing path and the photodetection part of a photoelectric converting element, and blocking the light introducing path with the shielding plate at any time except the photodetection time of an image on a CRT. CONSTITUTION:A shielding plate 14 for light is provided between the light introducing port 15 of a light pen for inputting an image on a CRT screen and the photodetection part of a photoelectric converting element 11 arranged in an external cylinder 16. This shielding plate 14 has a round hole 14a at a prescribed position, and the shielding plate 14 and the introducing port 15 are fixed in one body; when the introducing port 15 is set on the CRT screen at a desired position, the round hole 14a coincides with the incidence end 13a of an optical fiber 13 by the movement of the introducing port 15 and the image enters the photodetection part of the element 11. The introducing port 15 is blocked with the shielding plate 14 all the time except the photodetection time of the image to prevent malfunction due to chattering, voltage variation, etc., during operation, and data is amplified by an amplifying circuit 12 and sent out to a control part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56063417A JPS57178531A (en) | 1981-04-28 | 1981-04-28 | Photodetector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56063417A JPS57178531A (en) | 1981-04-28 | 1981-04-28 | Photodetector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57178531A true JPS57178531A (en) | 1982-11-02 |
Family
ID=13228687
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56063417A Pending JPS57178531A (en) | 1981-04-28 | 1981-04-28 | Photodetector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57178531A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004036539A3 (en) * | 2002-10-15 | 2005-01-20 | Ibm | Passive touch-sensitive optical marker |
-
1981
- 1981-04-28 JP JP56063417A patent/JPS57178531A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004036539A3 (en) * | 2002-10-15 | 2005-01-20 | Ibm | Passive touch-sensitive optical marker |
| US6917033B2 (en) | 2002-10-15 | 2005-07-12 | International Business Machines Corporation | Passive touch-sensitive optical marker |
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