61492-86-2Relevant academic research and scientific papers
Backlight unit
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, (2007/10/16)
The present invention discloses a backlight unit comprising plural linear light sources, and an optical functional sheet, wherein a prism structure having plural prisms is formed on at least one surface of the optical functional sheet, and the values of (Hn-1 + Hn)/(An- An-1) are approximately equivalent, wherein, in a brightness distribution graph that expresses a brightness distribution in the optical functional sheet, A1 is a peak site and H1 is a peak height of a first virtual image, A2 is a peak site and H2 is a peak height of a second virtual image adjacent to the first virtual image,-----, An is a peak site and Hn is a peak height of (n)th virtual image adjacent to (n-1)th virtual image, and these virtual images are derived from the plural linear light sources.
