Large area light panel and screen
First Claim
Patent Images
1. A privacy screen, comprising:
- a light source;
a panel comprising a planar first surface and a planar second surface, the panel configured to be at least partially transparent and positioned relative to the light source to receive light from the light source on at least one edge of the panel, the panel further configured such that the received light enters the panel and propagates therein; and
a plurality of light extraction dots disposed on the planar first surface, the plurality of light extraction dots is configured to extract light, propagating within the panel, uniformly across at least one of the planar first surface and the planar second surface, wherein at least one of the plurality of light extraction dots includes an inner layer disposed proximate to the first surface and an outer layer disposed at least partially on the inner layer, wherein the outer layer includes a first colored material that reflects ambient light of a first color and the inner layer includes a second colored material that reflects light, propagating within the panel, of a second color, and wherein the first color is different than the second color.
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Abstract
Embodiments of a panel lighting apparatus and methods of its manufacture are described. In one embodiment, the apparatus can include a light source, an at least partially transparent panel comprising a planar front surface and a planar back surface, the panel disposed in conjunction with the light source such that light from the light source is input into at least one edge of the panel and guided therein, and a plurality of light extraction dots disposed on the planar back surface, the plurality of light extraction dots configured to reflect light incident on the planar back surface and extract light from the light source propagating in the panel through the planar front surface.
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Citations
48 Claims
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1. A privacy screen, comprising:
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a light source; a panel comprising a planar first surface and a planar second surface, the panel configured to be at least partially transparent and positioned relative to the light source to receive light from the light source on at least one edge of the panel, the panel further configured such that the received light enters the panel and propagates therein; and a plurality of light extraction dots disposed on the planar first surface, the plurality of light extraction dots is configured to extract light, propagating within the panel, uniformly across at least one of the planar first surface and the planar second surface, wherein at least one of the plurality of light extraction dots includes an inner layer disposed proximate to the first surface and an outer layer disposed at least partially on the inner layer, wherein the outer layer includes a first colored material that reflects ambient light of a first color and the inner layer includes a second colored material that reflects light, propagating within the panel, of a second color, and wherein the first color is different than the second color. - 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, 24, 25, 26, 37, 38, 39)
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27. A lighting apparatus, comprising:
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a light source configured to switch between at least a first mode and a second mode, the light source emitting more light in the second mode than in the first mode; an at least partially transparent panel comprising a planar first surface and a planar second surface, the panel configured to receive light from the light source through an edge of the panel and propagate the light in the panel; and a plurality of light extraction features disposed on at least one of the first surface and the second surface, the plurality of light extraction features configured to extract light that propagates within the panel through one of the first surface and the second surface, the plurality of light extraction features extracting more light in the second mode than in the first mode such that visibility through the transparent panel is greater in the first mode than in the second mode. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35, 36, 40)
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41. A privacy screen, comprising:
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means for producing light; means for guiding light, the means for guiding light positioned relative to the means for producing light to receive light from the means for producing light on at least a portion of the means for guiding light, the means for guiding light configured such that the received light enters the means for guiding light and propagates therein; and means for extracting light from the means for guiding light, the means for extracting light disposed on the means for guiding light and configured to reflect light incident on the means for guiding light and extract light, propagating within the means for guiding light, uniformly across the means for guiding light, wherein the means for extracting light includes at least one dot including an inner layer disposed on the means for guiding light and an outer layer disposed at least partially on the inner layer, wherein the outer layer includes a first colored material that reflects ambient light of a first color and the inner layer includes a second color material that reflects light of a second color, and wherein the first color is different than the second color. - View Dependent Claims (42, 43, 44)
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45. A lighting apparatus, comprising:
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means for producing light, the means for producing light configured to switch between a first mode and a second mode, the means for producing light emitting more light in the second mode than in the first mode; means for guiding light, the means for guiding light configured to receive light provided from the means for producing light through a surface of the means for guiding light and propagate the light therein; and means for extracting light, the plurality of means for extracting light disposed on at least one surface of the means for guiding light, the means for extracting light configured to extract light that propagates within the means for guiding light through a surface on the means for guiding light, the plurality of means for extracting light extracting more light in the second mode than in the first mode such that visibility through the means for guiding light is greater in the first mode than in the second mode. - View Dependent Claims (46, 47, 48)
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Specification