Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Meng-Hua Wang0
Chih-Ming Lai0
Feng-Cheng Chung0
Date of Patent
July 20, 2010
0Patent Application Number
121774130
Date Filed
July 22, 2008
0Patent Primary Examiner
Patent abstract
An exemplary billboard includes a backlight module, a light transmissive canvas, a pattern layer and a light converging layer. The light transmissive canvas is adjacent to the backlight module. The light transmissive canvas includes a first surface facing the backlight module and a second surface opposite to the first surface. The pattern layer is formed on the second surface. The light converging layer covers the pattern layer and comprises a plurality of microstructures formed thereon distal from the light transmissive canvas.
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