Prism sheet

Details Prism sheet Prism sheet

2008-09-19

2010-11-09

Collins, Darryl J (Department: 2873)

Optical: systems and elements

Prism

With refracting surface

C359S625000, C362S333000, C362S339000, C362S620000

Reexamination Certificate

active

07830629

ABSTRACT:
An exemplary prism sheet includes a transparent main body. The transparent main body includes a first surface and a second surface. The first surface and the second surface are on opposite sides of the transparent main body. The first surface defines a plurality of micro-depressions. Each micro-depression forms four inner sidewalls connected with each other. A transverse width of each inner sidewall progressively decreases with increasing distance from the first surface. The second surface defines a plurality of parallelogram microstructures. Each parallelogram microstructure defines four adjacent triangular pyramid depressions.

REFERENCES:
patent: 3578967 (1971-05-01), Stahlhut et al.
patent: 3829680 (1974-08-01), Jones
patent: 5999685 (1999-12-01), Goto et al.
patent: 7530721 (2009-05-01), Mi et al.

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