Method capable of judging validity or invalidity of a status of

Details Method capable of judging validity or invalidity of a status of Method capable of judging validity or invalidity of a status of

1992-06-09

1995-11-21

Peng, John K.

Coded data generation or conversion

Bodily actuated code generator

Including keyboard or keypad

341 24, H04B 1500

Patent

active

054691591

ABSTRACT:
A method of detecting the status of a keyboard switch device judges validity or invalidity of the status of switching elements on the basis of simple conditions. With this method, processing of output data is facilitated. In a step S1, a scanning operation is carried out to detect the status of each switching element. In a step S2, the result of the scanning operation is stored in a memory unit as memorized information. In a step S3, closed element total number N, a closed row total number Nr, and a closed column total number Nc are counted with reference to the memorized information. In a step S4, a judgement is made as regards whether or not a predetermined condition is satisfied by the closed element total number N, the closed row total number Nr, and the closed column total number Nc. When the predetermined condition is satisfied, the memorized information is provided as valid data in a step S5. When the predetermined condition is not satisfied, the entirety of the memorized information is cancelled in a step S6.

REFERENCES:
patent: 4420744 (1983-12-01), Jesson
patent: 4821033 (1989-04-01), Mori et al.
patent: 4922248 (1990-05-01), Shiga
patent: 4929944 (1990-05-01), Nakajima
patent: 5059974 (1991-10-01), Wu
patent: 5220323 (1993-06-01), Ito et al.

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