Title:
PROGRAMMABLE LASER ILLUMINATED SIGN APPARATUS
Document Type and Number:
WIPO Patent Application WO2004104473
Kind Code:
A3
Abstract:
A self-contained sign, illuminated by laser or other source of substantially parallel beams (94), presenting intensely lighted and vividly colored displays, is programmable to display one or more user designed images, allows animation, and is adaptable to network control. The sign comprises a backlit illuminated apparatus of low depth to display dimension ratio. Embodiments astigmatically correct distortion of the projected dot (922) resulting from oblique projection angles. Embodiments further normalize obliquely incident light by employment of a transmissive refractive right angle structure. Distortion of a projected image is minimized by appropriate pre- or post-processing of display data.
Inventors:
HAY ALEXANDER MONTAGU (US)
Application Number:
PCT/US2004/011755
Publication Date:
August 25, 2005
Filing Date:
April 16, 2004
Export Citation:
Assignee:
GREENCO L L C DBA LFI INTERNAT (US)
HAY ALEXANDER MONTAGU (US)
HAY ALEXANDER MONTAGU (US)
International Classes:
F21V7/00; G02B26/08; G03B21/22; G09F13/00; H04N3/23; H04N9/31; F21S; (IPC1-7): F21V7/00; G02B26/08; G03B21/22; H04N3/23; G09F13/00
Foreign References:
| US4003080A | 1977-01-11 | |||
| US4714830A | 1987-12-22 | |||
| US6478432B1 | 2002-11-12 | |||
| US5467154A | 1995-11-14 | |||
| US6485145B1 | 2002-11-26 | |||
| US4737858A | 1988-04-12 |
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