LIGHT ASSEMBLY
First Claim
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1. A lighting assembly having a light output and comprising:
- a transflective surface, at least a portion of which is curved;
a reflector having an inner major surface facing said transflective surface;
an optical cavity between said transflective surface and said reflector having a length to depth ratio greater than 5;
1; and
a first light source positioned to introduce light into the optical cavity,wherein said transflective surface is semi-specularly reflective and exhibits a degree of angularly selective transmission of incident light such that the light output of said lighting assembly is homogenous and uniform along the length of said optical cavity, and wherein the inner major surface of said reflector is either (a) substantially parallel to at least 30 percent by area of the curved portion of the transflective surface, or (b) oriented to the curved portion of the transflective surface so that the separation between the two surfaces decreases along a distance away from the light source a maximum local ratio of decrease in separation (depth) to distance.
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Accused Products
Abstract
Light assembly (10) having reflector (16), light source(18), an outer light cover(12), and a curved transflective surface (15). Embodiments of light assemblies described herein are useful, for example, as signs, backlights, displays, task lighting, luminaire, and vehicle (e.g., cars, trucks, airplanes, etc.) components. Vehicle comprising light assemblies include those where the light assembly is a vehicle tail light assembly.
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Citations
20 Claims
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1. A lighting assembly having a light output and comprising:
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a transflective surface, at least a portion of which is curved; a reflector having an inner major surface facing said transflective surface; an optical cavity between said transflective surface and said reflector having a length to depth ratio greater than 5;
1; anda first light source positioned to introduce light into the optical cavity, wherein said transflective surface is semi-specularly reflective and exhibits a degree of angularly selective transmission of incident light such that the light output of said lighting assembly is homogenous and uniform along the length of said optical cavity, and wherein the inner major surface of said reflector is either (a) substantially parallel to at least 30 percent by area of the curved portion of the transflective surface, or (b) oriented to the curved portion of the transflective surface so that the separation between the two surfaces decreases along a distance away from the light source a maximum local ratio of decrease in separation (depth) to distance. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification