High brightness phosphorescent panel
First Claim
1. A luminous panel, comprising:
- a transparent layer with thickness between about 1 millimeter and about 3 millimeters; and
phosphorescent powder incorporated in said transparent layer in an amount between about 8 volume percent and about 15 volume percent of said transparent layer;
whereby a high brightness, bidirectional phosphorescent panel is obtained.
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Accused Products
Abstract
The invention describes an article of manufacture that comprises an optimized phosphorescent laminate structure that produces much brighter light than previously disclosed phosphorescent laminates or coatings by enabling and capturing multiple emissions and reflections of light emitted by phosphorescent particles that are distributed through the thickness of a transparent layer. These multiple emissions are enabled by providing a transparent carrier layer that is many times as thick as the phosphorescent powder particle size. That layer is loaded with an amount of phosphorescent powder that is low enough to allow light emitted by the deeper layers of powder to escape, but high enough to provide a very large amount of emitting powder. This structure may be protected by surface films and backed by a reflective layer for efficient unidirectional light absorption and emission.
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Citations
18 Claims
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1. A luminous panel, comprising:
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a transparent layer with thickness between about 1 millimeter and about 3 millimeters; and phosphorescent powder incorporated in said transparent layer in an amount between about 8 volume percent and about 15 volume percent of said transparent layer; whereby a high brightness, bidirectional phosphorescent panel is obtained. - View Dependent Claims (3, 5, 7)
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2. A luminous panel comprising:
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a transparent layer with thickness between about 750 microns and about 2,000 microns; phosphorescent powder incorporated in said transparent layer in an amount between about 8 volume percent and about 15 volume percent of said transparent layer; and a reflective backing layer contiguous to said transparent layer; whereby a high brightness, unidirectional phosphorescent panel is obtained. - View Dependent Claims (4, 6, 8)
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9. A luminous panel, comprising:
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a phosphorescent powder having a predetermined particle size; and a layer of light-transmitting material having said phosphorescent powder embedded therein, said layer of light-transmitting material having a thickness which is multiple times greater than said particle size of said phosphorescent powder; said phosphorescent powder being distributed in said light-transmitting material, in a concentration of about 15 volume percent or less and in an amount greater than would form a single particle-thick layer on a surface of said layer of light-transmitting material. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification