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US 12,222,534 B1Granted
Optical film
AssigneeLms Co., Ltd.
InventorsByeonghun Lee, Hyeonuk Park, Dongkyu Lee, Changgoo Park
Life of this patent
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Abstract
Provided is an optical film comprising a first base portion; a pyramid pattern layer including a plurality of pyramid patterns formed on a first surface of the first base portion and a first side of a base of the pyramid pattern arranged in a pyramid direction; and a first prism pattern layer including a plurality of first prism patterns formed on a second surface of the first base portion and an edge of the first prism pattern arranged in a prism direction.
Claims20
An optical film comprising:
- a first optical sheet including a first base portion;
- a pyramid pattern layer including a plurality of pyramid patterns formed on a first surface of the first base portion and a first side of a pyramid base of the pyramid pattern arranged in a pyramid direction;
- and
- a first prism pattern layer including a plurality of first prism patterns formed on a second surface of the first base portion and an edge of the first prism pattern arranged in a first prism direction,
- wherein the optical film satisfies either Equation 1 or Equation 2:
- n
- ·
- (
- pi
- 1-1
- )
- 2
- <
- pi
-
- 2
- <
- n
- ·
- pi
-
- 1
-
- or
- [
- Equation
-
- 1
- ]
- n
- ·
- (
- pi
- 1-1
- )
- 2
- >
- pi
-
- 2
- ,
- [
- Equation
-
- 2
- ]
- wherein pi1 is a first pitch corresponding to a length of the first side of the pyramid base of the pyramid pattern;
- pi1-1 is a first prime pitch corresponding to a diagonal length of the pyramid base of the pyramid pattern;
- pi2 is a second pitch corresponding to a base length of the first prism pattern;
- and n is a natural number.
47 more elements
A backlight unit comprising:
- an edge type light source;
- and
- an optical film disposed over the light source further comprising:
- a first optical sheet including a first base portion;
- a pyramid pattern layer including a plurality of pyramid patterns formed on a first surface of the first base portion and a first side of a pyramid base of the pyramid pattern arranged in a pyramid direction;
- and
- a first prism pattern layer including a plurality of first prism patterns formed on a second surface of the first base portion and an edge of the first prism pattern arranged in a first prism direction,
- wherein the optical film satisfies either Equation 5 or Equation 6:
- n
- ·
- (
- pi
- 1-1
- )
- 2
- <
- pi
-
- 2
- <
- n
- ·
- pi
-
- 1
-
- or
- [
- Equation
-
- 5
- ]
- n
- ·
- (
- pi
- 1-1
- )
- 2
- >
- pi
-
- 2
- ,
- [
- Equation
-
- 6
- ]
- wherein pi1 is a first pitch corresponding to a length of the first side of the pyramid base of the pyramid pattern;
- pi1-1 is a first prime pitch corresponding to a diagonal length of the pyramid base of the pyramid pattern;
- pi2 is a second pitch corresponding to a base length of the first prism pattern;
- and n is a natural number.
50 more elements
Dependencies are inferred from the claim text.