Directed optical signaling

Details Directed optical signaling Directed optical signaling

1989-04-19

1991-02-19

Arnold, Bruce Y.

Coded data generation or conversion

Digital code to digital code converters

Tree structure

350112, 341 22, G02B 504, G02B 1704, H03K 1794

Patent

active

049938088

ABSTRACT:
In order to improve the angle of sight and the light intensity of the light markings of keys on a keyboard, the keys are provided with a light conducting body arranged over the individual light sources of the individual light sources of the individual keys. This semi-conducting body preferably has the form of a truncated wedge whose truncated top face substantially coincides with the key top face and the bottom directed towards the light source is composed of no less than two facets of which the light beam 5 incident on the facets emerges from the top face divergingly and in virtually non-coincident light beams.

REFERENCES:
patent: 3144643 (1964-08-01), Andersson
patent: 4874913 (1989-10-01), Aoki et al.
patent: 4931794 (1990-06-01), Haag et al.

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