Optical film and lighting device using the optical film

Details Optical film and lighting device using the optical film Optical film and lighting device using the optical film

2006-10-13

2009-06-16

Ton, Anabel M (Department: 2875)

Stock material or miscellaneous articles

Liquid crystal optical display having layer of specified...

With viewing layer of specified composition

C428S001330, C428S131000, C428S134000, C428S135000

Reexamination Certificate

active

07547468

ABSTRACT:
An optical film for use in a side-light type lighting device of a liquid crystal display or the like includes a plurality of tilted column-shaped transparent film cells extending from a light entrance surface to a light exit surface of the optical film. Light-reflecting layers are provided on a part of side surfaces of each film cell. Light from an LED light source enters a light guide plate, exits the top surface of the light guide plate, and enters the film cells. The light is reflected by the light-reflecting layers of the cells to exit therefrom as directed light.

REFERENCES:
patent: 6818261 (2004-11-01), Kawabata
patent: 6846089 (2005-01-01), Stevenson et al.
patent: 6917473 (2005-07-01), Umemoto et al.
patent: 7227685 (2007-06-01), Umemoto et al.
patent: 7410679 (2008-08-01), Matsufuji
patent: 2003/0184691 (2003-10-01), Miyashita
patent: 2002-042529 (2002-02-01), None

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