Key board switch
AssigneeFutaba Denshi Kogyo K.K.
InventorsHisamitsu Takahashi, Tatsuo Yamaura, Masao Miyagishima, Takao Kishino
Life of this patent
Estimating the term…
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.
Claims11
A key switch comprising:
- a key stem connected to a key;
- a first contact means mounted on a first film and being in electrical contact with a first line;
- a second contact means mounted on a second film and being in electrical contact with a second line;
- at least one of said first and second films being formed of a flexible deformable elastomeric sheet material;
- said key stem, said first contact means and said second contact means being aligned so that an actuation of said key causes said first and second contact means to be in electrical contact and said first and second lines to be electrically connected;
- at least one of said first and second contact means being formed of a conductive electrode and a contiguous thin film organic type diode electrically connected in series and integrally formed within said key switch.
A key board having a plurality of key switches, each of said key switches comprising:
- a key stem connected to a key;
- a first contact means mounted on a first film and being in electrical contact with a first line;
- a second contact means mounted on a second film and being in electrical contact with a second line;
- at least one of said first and second films being formed of a flexible deformable elastomeric sheet material;
- said key stem, said first contact means and said second contact means being aligned so that an actuation of said key causes said first and second contact means to be in electrical contact and said first and second lines to be electrically connected;
- at least one of said first and second contact means being formed of a conductive electrode and a contiguous thin film organic-type diode electrically connected in series.
Dependencies are inferred from the claim text.