Card – picture – or sign exhibiting – Changing exhibitor – Variable reading stationary exhibitor
Reexamination Certificate
2011-01-18
2011-01-18
Hoge, Gary C (Department: 3611)
Card, picture, or sign exhibiting
Changing exhibitor
Variable reading stationary exhibitor
C040S442000, C040S564000, C352S100000
Reexamination Certificate
active
07870686
ABSTRACT:
A subway tunnel light box for displaying a back-lighted image to a viewer inside of a subway car traveling in the subway tunnel in which a transparent video display for displaying a number of images, such as an LCD, is mounted in the light box and a narrow light source, preferably having a width of one pixel, is positioned in the box behind each of the images at a distance less than a typical viewing distance so that each image is illuminated by an associated narrow light source with an associated narrow light source horizontal illumination angle substantially the same as a preselected perceived horizontal viewing angle calculated for the typical viewing distance based upon a physical height of the transparent video display and a desired aspect ratio of a perceived image.
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patent: 917587 (1909-04-01), Good
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patent: 2026753 (1936-01-01), Rosenthal et al.
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patent: 4383742 (1983-05-01), Brachet et al.
patent: 6353468 (2002-03-01), Howard et al.
patent: 2005/0174539 (2005-08-01), Walker et al.
Anderson Roy L.
Hoge Gary C
Wagner, Anderson & Bright, P.C.
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