US 7,477,424 B2
Apparatus having a light source for a transparent sheet of a scanner
Hsing-Tung Wang, Tai-Chung (Taiwan); and Bing-Zhi Wang, Hu-Wey (Taiwan)
Assigned to Transpacific Optics LLC, Wilmington, Del. (US)
Filed on Dec. 17, 2001, as Appl. No. 10/15,569.
Prior Publication US 2003/0112481 A1, Jun. 19, 2003
Int. Cl. H04N 1/04 (2006.01); H04N 1/46 (2006.01)
U.S. Cl. 358—474  [358/475; 358/487; 358/509] 24 Claims
OG exemplary drawing
 
1. An apparatus, comprising:
a scanner upper portion having an upper surface;
a light-emitting element proximate to the upper surface;
a reflective plate disposed between said upper surface and said light-emitting element, said reflective plate being configured to reflect light emitted from said light-emitting element onto a first surface;
an aperture formed at a first predetermined position on said reflective plate to decrease said reflected light on a portion of said first surface; and a spreading plate positioned between the light-emitting element and the first surface, wherein the spreading plate includes a first group of perforations that are less densely distributed than a second group of perforations.