JPS54134928A - Coordinate detection system of data input device - Google Patents
Coordinate detection system of data input deviceInfo
- Publication number
- JPS54134928A JPS54134928A JP4214378A JP4214378A JPS54134928A JP S54134928 A JPS54134928 A JP S54134928A JP 4214378 A JP4214378 A JP 4214378A JP 4214378 A JP4214378 A JP 4214378A JP S54134928 A JPS54134928 A JP S54134928A
- Authority
- JP
- Japan
- Prior art keywords
- multiplexer
- axial
- switch
- time
- input device
- 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
- Input From Keyboards Or The Like (AREA)
Abstract
PURPOSE: To avoid an error input caused by a contact defect such as chattering, by allowing an input after conforming a state for a constant time by scanning sequentially switch elements arranged in a matrix.
CONSTITUTION: Switch elements arranged in a matrix are scanned on by multiplexer 14 controlled by X-adderss counter 5 at any time. With one switch ON now, one of transistors Tr1 to Trs connected to the Y-axial position turns ON. Then, X-axial multiplexer 14 stops at the corresponding address, the Y-address counter starts immediately, and the Y-axial multiplexer operates. When the Y- axial multiplexer indicates the corresponding address, inputting is performed. Namely, both X and Y inputs deviate in terms of time and since it is required that the switch should be being depressed for the period, an error input such as chattering can be prevented.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4214378A JPS54134928A (en) | 1978-04-12 | 1978-04-12 | Coordinate detection system of data input device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4214378A JPS54134928A (en) | 1978-04-12 | 1978-04-12 | Coordinate detection system of data input device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54134928A true JPS54134928A (en) | 1979-10-19 |
Family
ID=12627710
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4214378A Pending JPS54134928A (en) | 1978-04-12 | 1978-04-12 | Coordinate detection system of data input device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54134928A (en) |
-
1978
- 1978-04-12 JP JP4214378A patent/JPS54134928A/en active Pending
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