| 摘要 |
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. |
