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US07827712B2 Lighted signage using reflected light behind the signage 失效
在标牌后面使用反射光照亮标志

Lighted signage using reflected light behind the signage
Abstract:
An apparatus and method for displaying back-lighted images to viewers moving along a path of travel past viewing boxes containing transparent images illuminated by substantially vertical light sources which are then reflected to obtain a shallow light box depth relative to the transparent images, the light sources being located behind the transparent images, relative to the viewer.
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