Optical film having a structured surface with rectangular based prisms
First Claim
1. An optical film, comprising:
- a body having an axis and a structured surface including a plurality of prismatic structures, each prismatic structure having a base including at least two longer sides disposed opposite to each other along a first general direction and at least two shorter sides disposed opposite to each other along a second general direction, wherein the body transmits a substantial portion of light incident thereon along the first general direction when an angle of incidence is within a first predetermined angle range with respect to the axis and reflects a substantial portion of light when the angle of incidence is outside the first predetermined angle range, and wherein the body transmits a substantial portion of light incident thereon along the second general direction when an angle of incidence is within a second predetermined angle range with respect to the axis and reflects a substantial portion of light when the angle of incidence is outside the second predetermined angle range; and
the body comprises a substrate portion having an additional optical characteristic different from an optical characteristic of the structured surface.
1 Assignment
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Accused Products
Abstract
Described is an optical film having a structured surface including a plurality of prismatic structures. Each prismatic structure has a base including at least two longer sides disposed opposite to each other along a first general direction and at least two shorter sides disposed opposite to each other along a second general direction. The body transmits light incident thereon along the first general direction when an angle of incidence is within a first predetermined angle range with respect to the axis and reflects light when the angle of incidence is outside the first predetermined angle range. The body transmits light incident thereon along the second general direction when an angle of incidence is within a second predetermined angle range with respect to the axis and reflects light when the angle of incidence is outside the second predetermined angle range. The optical film further includes a substrate portion having an additional optical characteristic different from an optical characteristic of the structured surface. Display devices including such optical films are also disclosed.
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Citations
31 Claims
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1. An optical film, comprising:
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a body having an axis and a structured surface including a plurality of prismatic structures, each prismatic structure having a base including at least two longer sides disposed opposite to each other along a first general direction and at least two shorter sides disposed opposite to each other along a second general direction, wherein the body transmits a substantial portion of light incident thereon along the first general direction when an angle of incidence is within a first predetermined angle range with respect to the axis and reflects a substantial portion of light when the angle of incidence is outside the first predetermined angle range, and wherein the body transmits a substantial portion of light incident thereon along the second general direction when an angle of incidence is within a second predetermined angle range with respect to the axis and reflects a substantial portion of light when the angle of incidence is outside the second predetermined angle range; and
the body comprises a substrate portion having an additional optical characteristic different from an optical characteristic of the structured surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A display device comprising:
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a case having a window;
a backlight situated in the case, an optical film situated between the backlight and the window, and a light valve arrangement situated between the optical film and the optical window;
wherein the optical film includes a body having an axis and a structured surface including a plurality of prismatic structures, each prismatic structure having a base including two longer sides disposed opposite to each other along a first general direction and two shorter sides disposed opposite to each other along a second general direction, wherein the body transmits a substantial portion of light incident thereon along the first general direction when an angle of incidence is within a first predetermined angle range with respect to the axis and reflects a substantial portion of light when the angle of incidence is outside the first predetermined angle range, wherein the body transmits a substantial portion of light incident thereon along the second general direction when an angle of incidence is within a second predetermined angle with respect to the axis and reflects a substantial portion of light when the angle of incidence is outside the second predetermined angle range, and wherein the body further comprises a substrate portion having an additional optical characteristic different from an optical characteristic of the structured surface. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. An optical film comprising:
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a substrate portion; and
a structured surface including a plurality of prismatic structures, each prismatic structure having a substantially rectangular base, first surfaces meeting the rectangular base along a width thereof and second surfaces meeting the rectangular base along a length thereof, wherein at least one of the surfaces reflects light incident thereon when an angle of incidence is between a first predetermined angle and a first axis parallel to the surface and redirects and transmits light there through when the angle of incidence is between the first predetermined angle and a second axis normal to the surface, wherein the length of each of the rectangular bases is greater than the width thereof to achieve a selected first orientation relative to the substrate portion of the first surfaces and a selected second orientation relative to the substrate portion of the second surfaces, and wherein the substrate portion has an additional optical characteristic different from an optical characteristic of the structured surface. - View Dependent Claims (27, 28, 29, 30, 31)
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Specification