Light guide within recessed housing
First Claim
1. An illumination apparatus comprising:
- a housing formed with a recess, wherein the recess includes one or more interior side walls;
a light guide positioned within the recess such that the light guide is in proximity to the one or more interior side walls; and
one or more light extraction features in the light guide that define an angular distribution of light emitted from the light guide, wherein the angular distribution of the light emitted from the light guide is such that the light is angularly dispersed from the recess without substantially illuminating the interior side walls.
1 Assignment
0 Petitions
Accused Products
Abstract
The invention is directed to an illumination apparatus that includes a light guide within a recessed housing. A light source, such as a light emitting diode can be used to provide light to the light guide. The light is transmitted through the light guide via total internal reflection (TIR), and can be emitted in a controlled manner to ensure that a desired angular distribution of light is achieved without substantially illuminating interior side walls of the recessed housing. In this manner, efficient lighting can be provided. In one embodiment, the invention is can be implemented within a cosmetic compact that includes a mirror. The compact may incorporate aspects of the invention by implementing a light guide within a ring-shaped recess of the compact to provide facial lighting to a user.
20 Citations
31 Claims
-
1. An illumination apparatus comprising:
-
a housing formed with a recess, wherein the recess includes one or more interior side walls;
a light guide positioned within the recess such that the light guide is in proximity to the one or more interior side walls; and
one or more light extraction features in the light guide that define an angular distribution of light emitted from the light guide, wherein the angular distribution of the light emitted from the light guide is such that the light is angularly dispersed from the recess without substantially illuminating the interior side walls. - 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, 27)
-
-
28. A method comprising:
-
positioning a light guide substantially within a recessed housing, wherein the recessed housing defines one or more interior side walls; and
emitting light from the light guide so as to substantially maximize angular distribution of light without substantially illuminating the walls of the recessed housing. - View Dependent Claims (29)
-
-
30. An illumination apparatus comprising:
-
a housing formed with a recess, wherein the recess includes one or more interior side walls; and
a light guide positioned substantially within the recess such that the light guide is in proximity to the one or more interior side walls, wherein the light guide is formed with one or more means for emitting light, wherein the means for emitting light define an angular distribution of light from the light guide, and wherein the angular distribution of light emitted from the light guide is such that light is angularly dispersed from the recess without substantially illuminating the one or more interior side walls. - View Dependent Claims (31)
-
Specification