Optical path changing film and reflective liquid-crystal display device including same
First Claim
1. An optical film comprising:
- a transparent film including a repetitive structure of a plurality of light exit means arranged at intervals of a regular pitch or intervals of irregular pitches in one of opposite surfaces of said transparent film, said repetitive structure of said plurality of light exit means having optical path changing slopes each inclined to said film surface at an inclination angle in a range of from 30 to 48 degrees in order to change an optical path of light from a direction of said film surface into a direction of thickness of said film; and
an anti-reflection layer disposed on said film surface in which said plurality of light exit means are formed, wherein said anti-reflection layer exhibits a reflectance of not higher than 1.5% with respect to perpendicularly incident light with a wavelength of 550 nm, said optical film is light-transmissible in said direction of the thickness of said film, and the thickness of the transparent film is set to be not larger than 300 μ
m.
1 Assignment
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Accused Products
Abstract
An optical film constituted by: a transparent film including a repetitive structure of a plurality of light exit means arranged at intervals of a regular pitch or intervals of irregular pitches in one of opposite surfaces of the transparent film, the repetitive structure of the plurality of light exit means having optical path changing slopes each inclined to the film surface at an inclination angle in a range of from 30 to 48 degrees in order to change an optical path of light from a direction of the film surface into a direction of thickness of the film; and an anti-reflection layer disposed on the film surface in which the plurality of light exit means are formed; wherein the optical film is light-transmissible in the direction of the thickness of the film. A reflective liquid-crystal display device constituted by: a reflective liquid-crystal display panel including at least one light source on one of side surfaces of the liquid-crystal display panel; and the optical film provided on a viewing side of the reflective liquid-crystal display panel so that a surface of the optical film in which a plurality of light exit means are formed faces outward.
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Citations
10 Claims
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1. An optical film comprising:
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a transparent film including a repetitive structure of a plurality of light exit means arranged at intervals of a regular pitch or intervals of irregular pitches in one of opposite surfaces of said transparent film, said repetitive structure of said plurality of light exit means having optical path changing slopes each inclined to said film surface at an inclination angle in a range of from 30 to 48 degrees in order to change an optical path of light from a direction of said film surface into a direction of thickness of said film; and
an anti-reflection layer disposed on said film surface in which said plurality of light exit means are formed, wherein said anti-reflection layer exhibits a reflectance of not higher than 1.5% with respect to perpendicularly incident light with a wavelength of 550 nm, said optical film is light-transmissible in said direction of the thickness of said film, and the thickness of the transparent film is set to be not larger than 300 μ
m.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
a reflective liquid-crystal display panel including at least one light source on one of side surfaces of said liquid-crystal display panel; and
an optical film according to claim 1 and provided on a viewing side of said reflective liquid-crystal display panel so that a surface of said optical film in which a plurality of light exit means are formed faces outward.
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Specification