Illumination device for simulating neon or similar lighting using phosphorescent dye
First Claim
1. An illumination device comprising:
- a light source for emitting light of a predetermined first hue; and
a light-transmitting medium having a predetermined density of phosphorescent dye, said light-transmitting medium positioned adjacent said light source such that an observer of said device perceives light that is different than said predetermined first hue.
2 Assignments
0 Petitions
Accused Products
Abstract
An illumination device simulates neon lighting using a light source for emitting light of a predetermined first hue and a light-transmitting medium having a predetermined density of phosphorescent dye positioned adjacent to the light source. The phosphorescent dye will absorb light emitted by the light source and emit light of a second hue. An observer of the device perceives light that is of a hue that is different from the predetermined first hue. A means for varying the intensity of the light emitted by the light source creates color changing effects in the illumination device. Light-emitting diodes (LEDs) are a suitable light source. A waveguide having both optical waveguide and light scattering properties is used to diffuse the combined light and simulate the uniform appearance of a neon tube. Alternatively, the waveguide itself can be doped with phosphorescent dye to emit light having the perceived hue.
28 Citations
25 Claims
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1. An illumination device comprising:
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a light source for emitting light of a predetermined first hue; and
a light-transmitting medium having a predetermined density of phosphorescent dye, said light-transmitting medium positioned adjacent said light source such that an observer of said device perceives light that is different than said predetermined first hue. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An illumination device, comprising:
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a plurality of light-emitting diodes emitting light of a predetermined first color; and
a light color conversion system, including;
a light-receiving surface positioned adjacent said light-emitting diodes;
a light-emitting surface; and
phosphorescing dye emitting light of a predetermined hue following absorption of light from said light-emitting diodes, wherein light observed along the light-emitting surface of said light color conversion system is perceived as having a color different than the predetermined first color of light emitted by said light-emitting diodes. - View Dependent Claims (14, 15, 16, 17, 18)
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19. An illumination device, comprising:
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a light source emitting light of a predetermined first hue;
a substantially rod-like member having a predetermined length and positioned adjacent said light source, said member being composed of a material that has both optical waveguide and light scattering properties so as to preferentially scatter light along the length of said rod-like member; and
a light-transmitting medium generally composed of a matrix of light-transmitting material and a phosphorescing dye, said light-transmitting medium including a light-receiving surface for receiving light emitted from said light source and a light-emitting surface for emitting light into said rod-like member, said phosphorescing dye emitting light of a second hue following absorption of light from said light source, wherein a collective light ultimately emitted from said rod-like member has a substantially uniform intensity along the length of said rod-like member. - View Dependent Claims (20, 21, 22, 23, 24, 25)
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Specification