JPS5592929A - Keyboard unit - Google Patents

Keyboard unit

Info

Publication number
JPS5592929A
JPS5592929A JP112079A JP112079A JPS5592929A JP S5592929 A JPS5592929 A JP S5592929A JP 112079 A JP112079 A JP 112079A JP 112079 A JP112079 A JP 112079A JP S5592929 A JPS5592929 A JP S5592929A
Authority
JP
Japan
Prior art keywords
driving
line group
phase
sense
line
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
JP112079A
Other languages
Japanese (ja)
Inventor
Hiroshi Tsuda
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.)
Sanyo Electric Co Ltd
Original Assignee
Sanyo Electric Co 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 Sanyo Electric Co Ltd filed Critical Sanyo Electric Co Ltd
Priority to JP112079A priority Critical patent/JPS5592929A/en
Publication of JPS5592929A publication Critical patent/JPS5592929A/en
Pending legal-status Critical Current

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  • Input From Keyboards Or The Like (AREA)

Abstract

PURPOSE: To shorten the time assigned to detect a key switch when detecting the operation state of a key by a program by driving all driving line groups in the 1st phase while driving them one by one in the 2nd phase.
CONSTITUTION: A matrix is formed of driving line group 11 and sense line group 12 and switches 13 are connected to intersections of those line groups 11 and 12. To line group 11 of this constitution, driver circuits 14 are connected and to those driver circuits 14, change-over circuit 17 connecting to the 1st driving signal source 15 is connected which supplies a signal to line group 11 at the same time and the 2nd driving signal source 16 composed of a shift register driving respective driving lines one by one in sequence are connected. Line group 11 is all driven in the 1st phase and they are driven one by one in the 2nd phase, so that sense circuit 18 connected to line group 12 can sense the operation states of switches 13 in a short time.
COPYRIGHT: (C)1980,JPO&Japio
JP112079A 1979-01-08 1979-01-08 Keyboard unit Pending JPS5592929A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP112079A JPS5592929A (en) 1979-01-08 1979-01-08 Keyboard unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP112079A JPS5592929A (en) 1979-01-08 1979-01-08 Keyboard unit

Publications (1)

Publication Number Publication Date
JPS5592929A true JPS5592929A (en) 1980-07-14

Family

ID=11492591

Family Applications (1)

Application Number Title Priority Date Filing Date
JP112079A Pending JPS5592929A (en) 1979-01-08 1979-01-08 Keyboard unit

Country Status (1)

Country Link
JP (1) JPS5592929A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57174731A (en) * 1981-04-20 1982-10-27 Matsushita Electric Ind Co Ltd Controller of audio device and the like

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57174731A (en) * 1981-04-20 1982-10-27 Matsushita Electric Ind Co Ltd Controller of audio device and the like

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