Liquid crystal cells – elements and systems – Particular structure – Particular illumination
Reexamination Certificate
2011-03-29
2011-03-29
Pak, Sung H (Department: 2874)
Liquid crystal cells, elements and systems
Particular structure
Particular illumination
Reexamination Certificate
active
07916242
ABSTRACT:
A prism sheet includes a transparent base film with first and second surfaces and an optical refracting part with a plurality of prism units on the second surface, wherein the prism units are integral with the transparent base film, each prism unit having a predetermined height and extending along a first direction on the second surface of the transparent base film, wherein each prism unit includes a ridge extending along the first direction, a distance along a normal between the second surface of the transparent base film and the ridge defining the predetermined height of the prism unit, and wherein at least two prism units include ridges inclined at a predetermined angle other than zero with respect to the second surface of the transparent base film, the inclined ridges being unevenly distributed on the second surface of the transparent base film.
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patent: 7540646 (2009-06-01), Naoi
patent: 2008/0225202 (2008-09-01), Joo et al.
patent: 2010/0066942 (2010-03-01), Teragawa
patent: 2010/0103351 (2010-04-01), Han et al.
Choi Ju Yeol
Choi Jun Hyeak
Han Young Soo
Jang Seok Hoon
Cheil Industries Inc.
Lee & Morse P.C.
Pak Sung H
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