Optical film
AssigneeAUO Corporation
InventorsYueh-Heng Lee, Chia-Hung Chen, Shih-Fu Tseng
Life of this patent
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Abstract
An optical film including a first substrate and a plurality of prism structures is provided. The plurality of prism structures are arranged on a first substrate surface of the first substrate along a first direction and extend along a second direction. The first substrate has a first side edge and a second side edge on opposite sides thereof along the first direction. Each of the prism structures has a structural height relative to the first substrate surface, and the structural height of each prism structure increases first and then decreases from the first side edge toward the second side edge.
Claims20
An optical film, adapted for use in a light source module and configured corresponding to a projection screen, wherein the projection screen has a viewing area formed by a plurality of eye points, and the optical film comprises:
- a first substrate, having a first side edge and a second side edge on opposite sides thereof along a first direction;
- and
- a plurality of prism structures, arranged on a first substrate surface of the first substrate along the first direction and extending along a second direction, wherein the plurality of prism structures comprises a first prism structure and a second prism structure having mutually different geometrical shapes,
- wherein a light source of the light source module is configured to emit a first light ray and a second light ray, the first light ray is incident on a first portion of the projection screen with a first light intensity after passing through the first prism structure, the second light ray is incident on a second portion of the projection screen with a second light intensity after passing through the second prism structure, the first light intensity is not equal to the second light intensity, a portion of a virtual image formed at any one of the plurality of eye points by the first light ray having the first light intensity and reflected from the first portion of the projection screen has a first display brightness, another portion of the virtual image formed at the any one of the plurality of eye points by the second light ray having the second light intensity and reflected from the second portion of the projection screen has a second display brightness, and the first display brightness is equal to the second display brightness.
An optical film, comprising:
- a first substrate;
- and
- a plurality of prism structures, arranged on a first substrate surface of the first substrate along a first direction and extending along a second direction, wherein the first substrate has a first side edge and a second side edge on opposite sides thereof along the first direction, each of the plurality of prism structures has a structural height relative to the first substrate surface, and the structural height of each of the plurality of prism structures increases first and then decreases from the first side edge toward the second side edge.
An optical film, comprising:
- a substrate, having a first side edge and a second side edge on opposite sides thereof along a first direction;
- and
- a plurality of prism structures, arranged on a substrate surface of the substrate along the first direction and extending along a second direction, wherein each of the plurality of prism structures has a structural height relative to the substrate surface, and a first structural surface and a second structural surface respectively facing the first side edge and the second side edge, a first angle is included between the first structural surface and the substrate surface, a second angle is included between the second structural surface and the substrate surface, the plurality of prism structures include a plurality of first prism structures, a plurality of second prism structures, and a plurality of third prism structures, and at least a portion of the plurality of third prism structures is disposed between each of the plurality of first prism structures and each of the plurality of second prism structures,
- wherein the first angle of each of the plurality of third prism structures is equal to the first angle of each of the plurality of first prism structures and different from the first angle of each of the plurality of second prism structures, the second angle of each of the plurality of third prism structures is equal to the second angle of each of the plurality of first prism structures and different from the second angle of each of the plurality of second prism structures, and the structural height of each of the plurality of third prism structures is less than the structural height of each of the plurality of first prism structures and the plurality of second prism structures.
Dependencies are inferred from the claim text.