Optical film with partially coated structure array and manufacturing method thereof
First Claim
1. An optical film for use on a display device or a light source for photolithography, comprising a substrate on which an array of structures is formed, wherein a material having a different refractive index, absorbency or reflectivity from that of a surface of the structures is partially coated on the surface of the structures, and a period, selected from a distance from a trough to a next trough and a distance from a crest to a next crest, of the array of structures provides a change in brightness, image, or light strength according to the viewing angle or the direction in which light passes through, or for representing a three-dimensional image.
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Abstract
The present invention relates to an optical film comprising a substrate on which an array of structures is formed, wherein a material having a different refractive index, absorbancy or reflectivity from that of a surface of the structures is partially coated on the surface of the structures, and a manufacturing method thereof. Specifically, the optical film according to one embodiment of the present invention may have a different transparency depending on the direction or can transmit light asymmetrically. Further, the optical film may be applicable to image devices, which need to change brightness or images depending on the angle of view or to display three-dimensional images.
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Citations
13 Claims
- 1. An optical film for use on a display device or a light source for photolithography, comprising a substrate on which an array of structures is formed, wherein a material having a different refractive index, absorbency or reflectivity from that of a surface of the structures is partially coated on the surface of the structures, and a period, selected from a distance from a trough to a next trough and a distance from a crest to a next crest, of the array of structures provides a change in brightness, image, or light strength according to the viewing angle or the direction in which light passes through, or for representing a three-dimensional image.
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8. A method of manufacturing an optical film for use on a display device or a light source for photolithography, characterized in that the method comprises the steps of:
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a) forming an array of structures on a substrate; b) partially coating a surface of the structures with a material having a different refractive index, absorbancy or reflectivity from that of the surface of the structures, wherein a period, selected from a distance from a trough to a next trough and a distance from a crest to a next crest, of the array of structures is selected to provide a change in brightness, image, or light strength according to the viewing angle or the direction in which light passes through, or for representing a three-dimensional image. - View Dependent Claims (9)
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Specification