Optical fiber light emitting apparatus

Details Optical fiber light emitting apparatus Optical fiber light emitting apparatus

1995-01-13

1996-07-30

Lee, John D.

Optical waveguides

Optical fiber waveguide with cladding

385 31, 385901, 362 32, G02B 602

Patent

active

055420168

ABSTRACT:
An optical fiber light emitting apparatus (200) comprises at least one optical fiber (201) arranged in a repeating, recurrent pattern extending substantially throughout a predetermined area (206). The optical fiber (201) has a plurality of locations along the length thereof permitting light entering at least one end of the optical fiber (201) for transmission therein to be selectively emitted by the optical fiber (201) at the plurality of locations (210) for producing substantially uniform illumination substantially throughout the predetermined area (206). The repeating, recurrent pattern may form a spiral or serpentine pattern, for example. The repeating, recurrent pattern eliminates the space required for the fan-in arrangement (115) of prior art optical fiber light emitting panels (100). The optical fiber light emitting apparatus (200) is beneficial for illuminating keypads (613) and displays (611) in electronic devices (600), such as portable radio telephones, having limited space available.

REFERENCES:
patent: 4761047 (1988-08-01), Mori
patent: 4885663 (1989-12-01), Parker
patent: 4907132 (1990-03-01), Parker
patent: 4997259 (1991-03-01), Ichimura et al.
patent: 5013128 (1991-05-01), Stern et al.
patent: 5187765 (1993-02-01), Muehlemann et al.
patent: 5226105 (1993-07-01), Myers
Peter Harold, "Membrane Keyboards with Fiber Optics Provide Simple, Low-Voltage Backlighting", EDN, Sep. 5, 1985, pp. 91-92.

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