LIGHT CONTROL DEVICE EXHIBITING BATWING LUMINOUS INTENSITY DISTRIBUTIONS IN UPPER AND LOWER HEMISPHERES
First Claim
1. A light control device implemented with multiple diffusers exhibiting, in response to incident light, multiple controllable intensity distribution patterns that cooperate to accomplish upwardly directed illumination of a ceiling surface and downwardly directed illumination of a work surface, comprising:
- a light source emitting first and second sets of light rays;
a first diffuser positioned to receive direct light emitted by the light source and carried by a first subset of the first set of light rays, the first diffuser having a light diffusing surface that partly transmits and partly scatters the first subset of the first set of light rays that, respectively, propagate as a divergent fan of light rays downwardly toward the work surface and propagate as two divergent fans of light rays upwardly and uninterrupted toward the ceiling surface; and
a second diffuser positioned to receive direct light emitted by the light source and carried by the second set of light rays, the second diffuser having a light diffusing surface that scatters the second set of light rays that propagate as two partly overlapping fans of light rays upwardly toward the ceiling surface,whereby the two divergent fans of light rays propagating from the first diffuser, the two partly overlapping fans of light rays propagating from the second diffuser, and direct light propagating from the light source combine and exit the light control device in a batwing luminous intensity distribution pattern toward the ceiling surface.
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Accused Products
Abstract
A light control device implemented as a luminaire exhibits an ultra-wide batwing luminous intensity distribution in an upper hemisphere that provides substantially uniform illumination of a ceiling surface, even when the luminaire is mounted very close to the ceiling. Luminous side panel diffusers facilitate blending the luminaire with the ceiling surface as they create a batwing luminous intensity distribution in a lower hemisphere to evenly illuminate a work plane.
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Citations
11 Claims
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1. A light control device implemented with multiple diffusers exhibiting, in response to incident light, multiple controllable intensity distribution patterns that cooperate to accomplish upwardly directed illumination of a ceiling surface and downwardly directed illumination of a work surface, comprising:
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a light source emitting first and second sets of light rays; a first diffuser positioned to receive direct light emitted by the light source and carried by a first subset of the first set of light rays, the first diffuser having a light diffusing surface that partly transmits and partly scatters the first subset of the first set of light rays that, respectively, propagate as a divergent fan of light rays downwardly toward the work surface and propagate as two divergent fans of light rays upwardly and uninterrupted toward the ceiling surface; and a second diffuser positioned to receive direct light emitted by the light source and carried by the second set of light rays, the second diffuser having a light diffusing surface that scatters the second set of light rays that propagate as two partly overlapping fans of light rays upwardly toward the ceiling surface, whereby the two divergent fans of light rays propagating from the first diffuser, the two partly overlapping fans of light rays propagating from the second diffuser, and direct light propagating from the light source combine and exit the light control device in a batwing luminous intensity distribution pattern toward the ceiling surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification