Apparatus and associated method for recovering lost break codes

Details Apparatus and associated method for recovering lost break codes Apparatus and associated method for recovering lost break codes

1997-09-30

1999-09-21

Horabik, Michael

Coded data generation or conversion

Bodily actuated code generator

Including keyboard or keypad

341 26, 359142, 359154, G08B 1100

Patent

active

059559756

ABSTRACT:
An apparatus and method for recovering "break" codes transmitted by a keyboard that are not properly received by the receiver of the computer system. The keyboard is an infrared keyboard that transmits to a receiver in the computer system "make" codes when the keys are depressed and transmits to the receiver "break" codes when the keys are released. Upon receipt of the "make" and "break" codes, the receiver keeps track of the status of each of the keys, i.e., depressed or released, by updating a database in response to receipt of the "make" and "break" codes. At select time intervals, the keyboard transmits to the receiver an "idle" code containing data corresponding to the status of each key. Upon receipt of the "idle" code, the receiver compares the "idle" code with the status of each key as indicated by the data base. The receiver then generates a "break" code for each of the keys that do not compare.

REFERENCES:
patent: 4937778 (1990-06-01), Wolf et al.
patent: 5189543 (1993-02-01), Lin et al.
patent: 5287526 (1994-02-01), Wolf et al.
patent: 5589599 (1996-12-01), Shiga
patent: 5615393 (1997-03-01), Kikinis
patent: 5737107 (1998-04-01), Umeda
patent: 5861822 (1999-01-01), Park

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