PRISM SHEET HAVING WET-OUT PROPERTY AND LCD BACK LIGHT UNIT THEREBY
First Claim
1. A prism sheet comprising:
- a base film made of a transparent material, the base film having a flat first surface; and
a light refracting part including a plurality of unit prisms unitarily formed with the base film on a second surface of the base film, opposite to the flat first surface, the unit prisms having a predetermined shape of a cross section and being arranged with orientation,wherein when an angle formed between a ridge of each of the unit prisms of the light refracting part and a normal line of the flat first surface is defined as θ
n, θ
n and θ
n+1 have different values from each other, and n is an integer more than 2.
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Accused Products
Abstract
A prism sheet, capable of enhancing wet-out ability in a whole back light unit while maintaining center brightness, transmittance and haze in good condition, is disclosed. The prism sheet includes a base film made of a transparent material and having a flat first surface, and a light refracting part including a plurality of unit prisms unitarily formed with the base film on a second surface of the base film, opposite to the flat first surface. The unit prisms have a predetermined shape of a cross section, and are arranged with orientation. When an angle formed between a ridge of the unit prism of the light refracting part and a normal line of the flat first surface is defined as θn, θn and θn+1 have different values from each other, and n is an integer more than 2. An LCD back light unit using the above prism sheet is also disclosed
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Citations
19 Claims
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1. A prism sheet comprising:
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a base film made of a transparent material, the base film having a flat first surface; and a light refracting part including a plurality of unit prisms unitarily formed with the base film on a second surface of the base film, opposite to the flat first surface, the unit prisms having a predetermined shape of a cross section and being arranged with orientation, wherein when an angle formed between a ridge of each of the unit prisms of the light refracting part and a normal line of the flat first surface is defined as θ
n, θ
n and θ
n+1 have different values from each other, and n is an integer more than 2. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification