Compound type of keyboard detector

Details Compound type of keyboard detector Compound type of keyboard detector

1996-02-26

1997-09-16

Hofsass, Jeffery

Coded data generation or conversion

Bodily actuated code generator

Including keyboard or keypad

341 20, 364189, H03K 1794

Patent

active

056685440

ABSTRACT:
A compound type keyboard detector is disclosed. It comprises a time-sequencing generator, a keyboard scanner, a column input port and a row input port, a column lock and a row lock, a keyboard-synchronization detector, a keyboard detector and a keyboard decoder. With the unique design of the keyboard detector in conjunction with the various circuits that are associated therewith, a given number of pins can be used for a relatively greater number of input keys, or a smaller number of pins can be used for relatively complicated input keyw. This type of keyboard detector is good for small IC products, and can reduce the manufacturing cost thereof.

REFERENCES:
patent: 5463386 (1995-10-01), Wu

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