High visibility lightpipe in close proximity to function key

Details High visibility lightpipe in close proximity to function key High visibility lightpipe in close proximity to function key

1995-04-13

1996-12-03

Mullen, Thomas

Coded data generation or conversion

Bodily actuated code generator

Including keyboard or keypad

200314, H03K 1794

Patent

active

055812511

ABSTRACT:
A lighted keyboard system which transmits light to the viewer via a clear rectangular column that uses the function key's guiding mechanism for support. The lightpipe emits light in a uniformly brilliant rectangle of light from a height above the surface of the keyboard. The lightpipe gathers light from an external light source which emits light at a wide viewing angle, and directs the emitted light along the center of the lightpipe to the emitting section. The beam of light is then diffused by the emitting section located at the top of the lightpipe, becoming a uniformly brilliant rectangle. The function key has a wide base which is used to guide the function key as it travels. This wide base never extends above the surface of the keyboard thereby maintaining all contacting surfaces between the guiding features and the function key below the surface of the keyboard. The function key has a key push center which is offset from the base of the function key. The associated guiding mechanism works in conjunction with the wide base to eliminate the moments produced when the function key is pressed at a point which is not over the base of the function key. The function key then moves smoothly until it is stopped by a stopping arm located on its associated lightpipe.

REFERENCES:
patent: 4531034 (1985-07-01), Inaba
patent: 4773090 (1988-09-01), Goatman
patent: 4845319 (1989-07-01), Watkins et al.
patent: 4924044 (1990-05-01), Takahashi et al.
patent: 5184116 (1993-02-01), Daugherty et al.

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