Key board switch

Details Key board switch Key board switch

1991-07-16

1993-01-05

Scott, J. R.

Electricity: circuit makers and breakers

Multiple circuit control

Multiple switch

200512, 341 22, 341 25, H01H 1370, H03K 1794, H04M 1100

Patent

active

051773309

ABSTRACT:
A key board switch capable of permitting all key switches to exhibit an N-key rollover function at a low cost while preventing an increase in thickness of the key board switch. For this purpose, a thin film diode is used for a contact of the key switch. The thin film diode may form at least one of the contacts of each of the key switches. Alternatively, the thin film diode may be connected in series to at least one of the contacts of each of the key switches. Alternatively, the thin film diode may be connected in series to at least one of the contacts of each of the key switches.

REFERENCES:
patent: 3860771 (1975-01-01), Lynn et al.
patent: 4499557 (1985-02-01), Holmberg et al.
patent: 4568918 (1986-02-01), Edel
patent: 4701579 (1987-10-01), Kurachi et al.

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