Dual film light guide for illuminating displays
First Claim
1. A light guide system comprising:
- a cover layer; and
a light guide body comprising a plurality of surface relief features extending into the light guide body, the surface relief features comprising a plurality of angled facets, wherein, in a cross-sectional side view, the plurality of angled facets comprises at least two facets coated with a reflective coating at opposing sides of the surface relief features;
wherein the cover layer and light guide body are configured to guide light therein, and wherein the cover layer is disposed adjacent to the plurality of the surface relief features such that a plurality of cavities are formed between the cover layer and the light guide body by a substantially planar surface of the cover layer and substantially all the surface relief features disposed between the cover layer and the light guide body,wherein, in a cross-sectional side view, each surface relief feature is substantially symmetric about an axis perpendicular to the planar surface of the cover layer,wherein the light guide body is thicker than the cover layer, andwherein each angled facet is substantially non-perpendicular to the planar surface of the cover layer.
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Accused Products
Abstract
A front light guide panel including a plurality of embedded surface features is provided. The front light panel is configured to deliver uniform illumination from an artificial light source disposed at one side of the font light panel to an array of display elements located behind the front light guide while allowing for the option of illumination from ambient lighting transmitted through the light guide panel. The surface embedded surface relief features create air pockets within the light guide panel. Light incident on the side surface of the light guide propagates though the light guide until it strikes an air/light material guide interface at one on the air pockets. The light is then turned by total internal reflection through a large angle such that it exits an output face disposed in front of the array of display elements.
88 Citations
27 Claims
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1. A light guide system comprising:
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a cover layer; and a light guide body comprising a plurality of surface relief features extending into the light guide body, the surface relief features comprising a plurality of angled facets, wherein, in a cross-sectional side view, the plurality of angled facets comprises at least two facets coated with a reflective coating at opposing sides of the surface relief features; wherein the cover layer and light guide body are configured to guide light therein, and wherein the cover layer is disposed adjacent to the plurality of the surface relief features such that a plurality of cavities are formed between the cover layer and the light guide body by a substantially planar surface of the cover layer and substantially all the surface relief features disposed between the cover layer and the light guide body, wherein, in a cross-sectional side view, each surface relief feature is substantially symmetric about an axis perpendicular to the planar surface of the cover layer, wherein the light guide body is thicker than the cover layer, and wherein each angled facet is substantially non-perpendicular to the planar surface of the cover layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A light guide system comprising:
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means for guiding light comprising a plurality of means for redirecting light, the light redirecting means comprising a plurality of angled facets, wherein, in a cross-sectional side view, the plurality of angled facets comprises at least two facets coated with a reflective coating at opposing sides of the light redirecting means; means for covering the light redirecting means; means for displaying images, the displaying images means disposed under the light guiding means, wherein the covering means and light guiding means are configured to guide light therein, and wherein the covering means is disposed adjacent to the plurality of light redirection means such that a plurality of cavities are formed between the covering means and the light guiding means by a substantially planar surface of the covering means and substantially all of the light redirection means disposed between the covering means and the light guiding means, wherein, in a cross-sectional side view, each light redirecting means is substantially symmetric about an axis perpendicular to the planar surface of the covering means, wherein the light guiding means is thicker than the covering means, and wherein each angled facet is substantially non-perpendicular to the planar surface of the covering means. - View Dependent Claims (25, 26, 27)
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Specification