Displays with rounded-tip turning films
First Claim
1. A plurality of brightness enhancing films, comprising:
- a first brightness enhancing film that includes a first transparent layer having a series of parallel ridges, each ridge having a triangular cross section with a rounded peak that has a radius of curvature of at least one micron; and
a second brightness enhancing film that includes a second transparent layer having a series of parallel ridges, each ridge having a triangular cross section with a rounded peak that has a radius of curvature of at least one micron, wherein the ridges of the first transparent layer extend parallel to a first axis, and wherein the ridges of the second transparent layer extend parallel to a second axis.
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Accused Products
Abstract
An electronic device may be provided with a display having backlight structures. The backlight structures may include a light source. Light from the light source may be coupled into an edge of a light guide plate. The backlight structures may include layers such as a diffuser layer and one or more layers of brightness enhancing film. The brightness enhancing film layers may be used to collimate light scattered from the light guide plate and thereby enhance backlight efficiency. Brightness enhancing films may be formed from transparent substrates such as layers of polyester. A patterned polymer layer such as a layer of patterned cured resin may be formed on the transparent substrate of a backlight enhancing film. A roller-based manufacturing process may be used to form the patterned polymer layer on the substrate. The patterned polymer layer may include a series of parallel ridges with rounded peaks.
13 Citations
15 Claims
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1. A plurality of brightness enhancing films, comprising:
- a first brightness enhancing film that includes a first transparent layer having a series of parallel ridges, each ridge having a triangular cross section with a rounded peak that has a radius of curvature of at least one micron; and
a second brightness enhancing film that includes a second transparent layer having a series of parallel ridges, each ridge having a triangular cross section with a rounded peak that has a radius of curvature of at least one micron, wherein the ridges of the first transparent layer extend parallel to a first axis, and wherein the ridges of the second transparent layer extend parallel to a second axis. - View Dependent Claims (2, 3, 4, 5, 6, 7)
- a first brightness enhancing film that includes a first transparent layer having a series of parallel ridges, each ridge having a triangular cross section with a rounded peak that has a radius of curvature of at least one micron; and
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8. A display, comprising:
- display layers configured to generate an image; and
a backlight unit configured to provide backlight for the display layers, the backlight unit including a plurality of brightness enhancing films, wherein the plurality of brightness enhancing films comprises;
a first brightness enhancing film that includes a first transparent layer having a series of parallel ridges, each ridge having a rounded peak that has a radius of curvature of at least one micron, and a second brightness enhancing film that includes a second transparent layer having a series of parallel ridges, each ridge having a rounded peak that has a radius of curvature of at least one micron, wherein the ridges of the first transparent layer extend parallel to a first axis, and wherein the ridges of the second transparent layer extend parallel to a second axis. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
- display layers configured to generate an image; and
Specification