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US 12,222,595 B2Granted
Optical film comprising a first sheet having a pyramid pattern layer and backlight unit having the same
AssigneeLms Co., Ltd.
InventorsHyeonuk Park, Byeonghun Lee, Dongkyu Lee
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Abstract
According to various embodiments of the present disclosure, an optical film comprises a first sheet including a pyramid pattern layer including a plurality of pyramid patterns and a first prism pattern layer including a plurality of first prisms patterns; a second sheet including a second prism pattern layer including a plurality of second prism patterns and a first diffusion layer; and a third sheet including a third prism pattern layer including a plurality of third prism patterns and a second diffusion layer.
Claims14
An optical film comprising:
- a first 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 wherein each pyramid pattern has a first pitch corresponding to a length of a first side of a pyramid base of the pyramid pattern and a first prime pitch corresponding to a diagonal length of the pyramid base of the pyramid pattern;
- and a first prism pattern layer including a plurality of first prisms patterns formed on a second surface of the first base portion wherein each first prism pattern has a second pitch corresponding to a prism base length of the first prism pattern;
- a second sheet including a second base portion;
- a second prism pattern layer including a plurality of second prism patterns formed on a first surface of the second base portion;
- and a first diffusion layer formed on a second surface of the second base portion wherein the first diffusion layer is disposed over the first sheet facing the pyramid pattern layer;
- and
- a third sheet including a third base portion;
- a third prism pattern layer including a plurality of third prism patterns formed on a first surface of the third base portion;
- and a second diffusion layer formed on a second surface of the third base portion wherein the second diffusion layer is disposed over the second sheet facing the second prism pattern layer,
- wherein ridges of the plurality of the first prism patterns are formed along a first direction;
- a direction extended from the side of the pyramid base of the pyramid pattens forms an angle with the first direction in a range of 0° or greater and 45° or less;
- ridges of the plurality of the second prism patterns are formed along a second direction substantially perpendicular to the first direction;
- and ridges of the plurality of the third prism patterns are formed along a third direction substantially perpendicular to the second direction.
11 more elements
A backlight unit comprising:
- an edge type light source;
- and
- an optical film disposed over the light source further comprising:
- a first 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 wherein each pyramid pattern has a first pitch corresponding to a length of a first side of a pyramid base of the pyramid pattern and a first prime pitch corresponding to a diagonal length of the pyramid base of the pyramid pattern;
- and a first prism pattern layer including a plurality of first prisms patterns formed on a second surface of the first base portion wherein each first prism pattern has a second pitch corresponding to a prism base length of the first prism pattern;
- a second sheet including a second base portion;
- a second prism pattern layer including a plurality of second prism patterns formed on a first surface of the second base portion;
- and a first diffusion layer formed on a second surface of the second base portion wherein the first diffusion layer is disposed over the first sheet facing the pyramid pattern layer;
- and
- a third sheet including a third base portion;
- a third prism pattern layer including a plurality of third prism patterns formed on a first surface of the third base portion;
- and a second diffusion layer formed on a second surface of the third base portion wherein the second diffusion layer is disposed over the second sheet facing the second prism pattern layer,
- wherein ridges of the plurality of the first prism patterns are formed along a first direction;
- a direction extended from the side of the pyramid base of the pyramid pattens forms an angle with the first direction in a range of 0° or greater and 45° or less;
- ridges of the plurality of the second prism patterns are formed along a second direction substantially perpendicular to the first direction;
- and ridges of the plurality of the third prism patterns are formed along a third direction substantially perpendicular to the second direction.
14 more elements
An optical film comprising:
- a first 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 wherein each pyramid pattern has a first pitch corresponding to a length of a first side of a pyramid base of the pyramid pattern and a first prime pitch corresponding to a diagonal length of the pyramid base of the pyramid pattern;
- and a first prism pattern layer including a plurality of first prisms patterns formed on a second surface of the first base portion wherein each first prism pattern has a second pitch corresponding to a prism base length of the first prism pattern,
- wherein ridges of the plurality of the first prism patterns are formed along a first direction and a direction extended from the side of the pyramid base of the pyramid pattens forms an angle with the first direction in a range of 0° or greater and 45° or less;
- and
- wherein the optical film satisfies either Formula 5 or Formula 6:
- n
- ·
- (
- pi
-
- 1
- -
- 1
- )
- 2
- <
- pi
-
- 2
- <
- n
- ·
- pi
-
- 1
- [
- Formula
-
- 5
- ]
- or
- n
- ·
- (
- pi
-
- 1
- -
- 1
- )
- 2
- >
- pi
-
- 2
- ,
- [
- Formula
-
- 6
- ]
- wherein pi1 is the first pitch;
- pi1-1 is the first prime;
- pi2 is the second pitch;
- and n is a natural number.
53 more elements
A backlight unit comprising:
- an edge type light source;
- and
- an optical film disposed over the light source, the optical film comprising:
- a first 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 wherein each pyramid pattern has a first pitch corresponding to a length of a first side of a pyramid base of the pyramid pattern and a first prime pitch corresponding to a diagonal length of the pyramid base of the pyramid pattern;
- and a first prism pattern layer including a plurality of first prisms patterns formed on a second surface of the first base portion wherein each first prism pattern has a second pitch corresponding to a prism base length of the first prism pattern,
- wherein ridges of the plurality of the first prism patterns are formed along a first direction and a direction extended from the side of the pyramid base of the pyramid pattens forms an angle with the first direction in a range of 0° or greater and 45° or less;
- and
- wherein the optical film satisfies either Formula 5 or Formula 6:
- n
- ·
- (
- pi
-
- 1
- -
- 1
- )
- 2
- <
- pi
-
- 2
- <
- n
- ·
- pi
-
- 1
- [
- Formula
-
- 5
- ]
- or
- n
- ·
- (
- pi
-
- 1
- -
- 1
- )
- 2
- >
- pi
-
- 2
- ,
- [
- Formula
-
- 6
- ]
- wherein pi1 is the first pitch;
- pi1-1 is the first prime;
- pi2 is the second pitch;
- and n is a natural number.
56 more elements
Dependencies are inferred from the claim text.