Writable disk sign

Details Writable disk sign Writable disk sign

1997-11-17

1999-12-14

O'Shea, Sandra

Illumination

Plural light sources

With support

362 31, 362 40, 362252, 362277, 362280, 362281, 362319, 362351, 362800, 362812, 362235, 40449, 40452, F21V 2100

Patent

active

060008121

ABSTRACT:
An array of disks faces a viewing direction is composed of disk's rotatable about an axis approximately perpendicular to the viewing direction between alternating orientations where bright and dark sides are respectively displayed in the viewing direction. There is provided a row of LED's located forwardly of the array and out of the normal viewing path located to illuminate the disks of said array. Masking means prevents direct illumination from said LED's being visible in the viewing direction.

REFERENCES:
patent: 5497573 (1996-03-01), Stadjuhar et al.
patent: 5640792 (1997-06-01), Smith et al.
patent: 5771616 (1998-06-01), Tijanic
patent: 5793343 (1991-06-01), Hart et al.
patent: 5909971 (1999-06-01), Tijanic

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