Key input device

Details Key input device Key input device

2011-07-12

2011-07-12

Zimmerman, Brian A (Department: 2612)

Coded data generation or conversion

Bodily actuated code generator

Including keyboard or keypad

C341S026000

Reexamination Certificate

active

07978098

ABSTRACT:
Key switches SW1-SW6short-circuit one ends of resistors R corresponding thereto and a termination of a resistor string unit STR1, in accordance with inputs made by keys KEY1-KEY6assigned thereto, respectively. The keys KEY1-KEY6are made active in a period when the selection command SEL is at “P1”, so that control unit2can identify which key is used to make an input, out of the keys KEY1-KEY6. The keys KEY7-KEY12are made active in a period when the selection command SEL is at “P2”, so that control unit2can identify which key is used to make an input, out of the keys KEY7-KEY12.

REFERENCES:
patent: 3-9036 (1991-01-01), None
patent: 5-88806 (1993-04-01), None
Utility Model Laying-Open Gazette for Japanese Publication No. 03-009036, Publication date Jan. 29, 1991 (2 pages).
Japanese Office Action for Japanese Application No. 2006-151851, mailed on Apr. 22, 2008 (4 pages).
Patent Abstracts of Japan for Japanese Publication No. 05-088806, Publication date Apr. 9, 1993 (1 page).

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