Signal processing system for transmission of data between a keyb

Details Signal processing system for transmission of data between a keyb Signal processing system for transmission of data between a keyb

1997-04-15

1999-05-25

Sheikh, Ayaz R.

Boots, shoes, and leggings

395309, 395882, 395883, 3647081, G06F 1300, G06F 300

Patent

active

059077182

ABSTRACT:
A signal processing system which can perform cable transmission or optical transmission of data at the time of data transmission between a keyboard (1) and a signal processing unit to thereby has flexibility of data transmission. This signal processing system is composed of the keyboard (1), the signal processing unit and a receiving adapter unit. Further, the keyboard (1) consists of: a key matrix (6); a control portion (6) for outputting switch data corresponding to an operated key; a data transmitting portion (9) for outputting switch data through a cable (4); an optical data transmitting portion (10) for performing optical transmission of switch data; and a power supply (11). The receiving adapter unit is provided with: a data receiving portion for receiving switch data transmitted through the cable (4); an optical data receiving portion for receiving optical data transmitted by performing optical transmission; a storage portion for storing switch data received by a data receiving portion or an optical data receiving portion; and a transmission/reception control portion for converting switch data read from the storage portion into a switch code, for transmitting the switch code to the signal processing unit and for processing a signal supplied from the signal processing unit.

REFERENCES:
patent: 4254407 (1981-03-01), Tipon
patent: 4644497 (1987-02-01), Tajima et al.
patent: 4706068 (1987-11-01), Eberhard
patent: 5323153 (1994-06-01), Sonobe et al.
patent: 5440502 (1995-08-01), Register
patent: 5757354 (1998-05-01), Kawamura
patent: 5758193 (1998-05-01), Tsuji et al.

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