Light control device
First Claim
1. A light control device comprising:
- a first light transmissive film comprising a first plurality of light absorbing regions extending into a surface thereof; and
a second light transmissive film disposed adjacent the first light transmissive film and comprising a second plurality of light absorbing regions extending into a surface thereof, wherein the first plurality of light absorbing regions and the second plurality of light absorbing regions are relatively positioned to allow a viewer to view an image through the light control device within a range of viewing angles and to block viewing of the image through the light control device outside the range of viewing angles.
1 Assignment
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Accused Products
Abstract
A light control device is disclosed that includes a two film construction, each film having a plurality of light absorbing regions. For example, the light absorbing elements can be a series of grooves or column-like indentations in the films that are filled or coated with a light absorbing material. The two films can be adjacently disposed so that their respective light absorbing regions form a plurality of light absorbing elements that extend along the thickness direction of the device. The light absorbing elements allow a viewer to view an image through the light control device within a range of viewing angles while blocking a view of the image outside that range of viewing angles. The two film construction allows for relative ease of manufacture as well as the ability to form light absorbing elements that can provide better viewing uniformity throughout a typical viewing range, a sharp privacy viewing cut off, and reduced ghost image formation.
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Citations
18 Claims
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1. A light control device comprising:
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a first light transmissive film comprising a first plurality of light absorbing regions extending into a surface thereof; and
a second light transmissive film disposed adjacent the first light transmissive film and comprising a second plurality of light absorbing regions extending into a surface thereof, wherein the first plurality of light absorbing regions and the second plurality of light absorbing regions are relatively positioned to allow a viewer to view an image through the light control device within a range of viewing angles and to block viewing of the image through the light control device outside the range of viewing angles. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A process for making a light control device comprising the steps of:
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forming a first light transmissive film having a first plurality of indentations extending into a surface thereof;
forming a second light transmissive film having a second plurality of indentations extending into a surface thereof;
rendering the first and second plurality of indentations light absorbing; and
adjacently disposing the first and second light transmissive films, wherein when the light control device is positioned between an image and a viewer, the light control device is capable of allowing the viewer to view the image through the light control device within a range of viewing angles and to block viewing of the image through the light control device outside the range of viewing angles. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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Specification