JPS5674739A - Light pen indicating position deciding method in crt display - Google Patents
Light pen indicating position deciding method in crt displayInfo
- Publication number
- JPS5674739A JPS5674739A JP15168179A JP15168179A JPS5674739A JP S5674739 A JPS5674739 A JP S5674739A JP 15168179 A JP15168179 A JP 15168179A JP 15168179 A JP15168179 A JP 15168179A JP S5674739 A JPS5674739 A JP S5674739A
- Authority
- JP
- Japan
- Prior art keywords
- light pen
- field
- pulse outputs
- crt display
- indicating position
- 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
Links
Landscapes
- Position Input By Displaying (AREA)
Abstract
PURPOSE: To display a pattern so that the position in the horizontal direction of the near-by part opposed to the light pen can be recognized stably, by deciding the address of the memory to be written in accordance with the second and subsequent pulse outputs of the light pen in one field.
CONSTITUTION: As for this CRT display, the light pen 13 is opposed close to the picture of CRT12, and when it is moved, a pattern following its moving locus is displayed on the CRT picture. This light pen 13 detects plural scanning lines per 1 field, sets the sensitivity in order to obtain the pulse outputs corresponding to the respective lines, and decides the address of the digital memory 11 in which a necessary data is to be written, in accordance with the second and subsequent pulse outputs of the light pen 13 in 1 field. Accordingly, it is possible to get rid of the inconvenience that the horizontal direction coordinate of the light pen 13 indicating position remarkably varies by slight variation in the vertical direction of the light pen 13.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP54151681A JPS5926052B2 (en) | 1979-11-21 | 1979-11-21 | How to determine the position of a light pen on a CRT display |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP54151681A JPS5926052B2 (en) | 1979-11-21 | 1979-11-21 | How to determine the position of a light pen on a CRT display |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5674739A true JPS5674739A (en) | 1981-06-20 |
JPS5926052B2 JPS5926052B2 (en) | 1984-06-23 |
Family
ID=15523922
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP54151681A Expired JPS5926052B2 (en) | 1979-11-21 | 1979-11-21 | How to determine the position of a light pen on a CRT display |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5926052B2 (en) |
-
1979
- 1979-11-21 JP JP54151681A patent/JPS5926052B2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS5926052B2 (en) | 1984-06-23 |
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