Light transmission apparatus for electro-optically coupling to a

Details Light transmission apparatus for electro-optically coupling to a Light transmission apparatus for electro-optically coupling to a

Filed on

1992-12-01

Date issued

1993-12-07

Examiner

Bertsch, Richard A.

Patent Class

Illumination

SubClass

Revolving

Other Related Categories

362 26, 362800, 34081531, F21V 704

Type

Patent

Status

active

Patent number

052688232

Description

ABSTRACT:
Light transmission and alignment apparatus for electro-optically coupling to electronic instrument display panels and including a plurality of light emitting diodes mounted on one major surface of a printed circuit board aligned within an electronic instrument housing. A plurality of light pipes are coupled, respectively, between the plurality of light emitting diodes and a display panel on an outer surface of the electronic instrument housing. The light pipes are joined in a one piece molded construction to orthogonally positioned frame members which are received by the printed circuit board for aligning the light pipes in all of the X, Y, and Z axes within the instrument housing. The light pipes are gently curved upwardly and outwardly from the LEDs on the adjacent PC board major surface and along a 90.degree. radius of curvature to lens on the display panel. These light pipes are also tapered from a larger light receiving end to a smaller light projecting end which operates to couple light directly to symbols or characters on the display panel.

REFERENCES:
patent: 3142235 (1964-07-01), Siegmund
patent: 3439157 (1969-04-01), Myles
patent: 4141058 (1979-02-01), Mizohata et al.
patent: 4431966 (1984-02-01), Pucciarello
patent: 4555694 (1985-11-01), Yanagishima et al.
patent: 4933818 (1990-06-01), Eckmann
patent: 5043716 (1991-08-01), Latz et al.
patent: 5053765 (1991-10-01), Sonehara et al.

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