Illumination Devices Including Multiple Light Emitting Elements

Abstract

A variety of illumination devices are disclosed that are configured to manipulate light provided by one or more light-emitting elements (LEEs). In general, embodiments of the illumination devices feature one or more optical couplers that redirect illumination from the LEEs to a reflector which then directs the light into a range of angles. In some embodiments, the illumination device includes a second reflector that reflects at least some of the light from the first reflector. In certain embodiments, the illumination device includes a light guide that guides light from the collector to the first reflector. The components of the illumination device can be configured to provide illumination devices that can provide a variety of intensity distributions. Such illumination devices can be configured to provide light for particular lighting applications, including office lighting, task lighting, cabinet lighting, garage lighting, wall wash, stack lighting, and downlighting.

1 - 47 . (canceled) 
     
     
         48 . A light fixture, comprising:
 an array of light emitting diodes (LEDs), the array extending along a first direction and the LEDs being arranged to emit light along an axis orthogonal to the first direction; and   a light guide module having an input surface extending along the first direction and facing the array of LEDs, the light guide module comprising a first light guide and a second light guide,   wherein the first light guide extends along the first direction and is configured to guide at least some of the light received by the light guide module at the input surface in a second direction orthogonal to the first direction, and   the second light guide extends along the first direction and is configured to guide at least some of the light received by the light guide module at the input surface in a third direction orthogonal to the first direction and non-parallel to the second direction.   
     
     
         49 . The light fixture of  claim 48 , wherein the first light guide has an edge extending along the first direction opposite the input surface. 
     
     
         50 . The light fixture of  claim 49 , wherein the second light guide has an edge extending along the first direction opposite the input surface, the edge of the second light guide being spatially displaced from the edge of the first light guide. 
     
     
         51 . The light fixture of  claim 50 , wherein the edges of the first and second light guides are equidistant from the input surface. 
     
     
         52 . The light fixture of  claim 48 , wherein at least some of the light coupled into the light guide module at the input surface propagates within the first light guide due to total internal reflection at a side surface of the first light guide. 
     
     
         53 . The light fixture of  claim 52 , wherein at least some of the light coupled into the light guide module at the input surface propagates within the second light guide due to total internal reflection at a side surface of the second light guide. 
     
     
         54 . The light fixture of  claim 48 , wherein, in cross section, the light guide module is v-shaped, the input surface being located at the apex of the v-shape. 
     
     
         55 . The light fixture of  claim 48 , wherein the array is a one-dimensional array. 
     
     
         56 . The light fixture of  claim 48 , wherein the first and second light guides have a substantially constant thickness along their respective light guide directions. 
     
     
         57 . The light fixture of  claim 48 , wherein the light guide module comprises one or more depressions at the input surface sized to accommodate the LEDs. 
     
     
         58 . The light fixture of  claim 48 , wherein the light guide module comprises a transparent material. 
     
     
         59 . The light fixture of  claim 58 , wherein the transparent material is an organic plastic. 
     
     
         60 . The light fixture of  claim 59 , wherein the transparent organic plastic is polycarbonate or acrylic. 
     
     
         61 . The light fixture of  claim 48 , wherein the first and second light guides are configured to scatter at least some of the light propagating within the light guides out of a side surface of the light guide. 
     
     
         62 . The light fixture of  claim 61 , wherein the first and second light guides each comprise scattering centers that scatter some of the light from within the light guide through portions of the side surface of the light guide. 
     
     
         63 . The light fixture of  claim 62 , wherein the scattering centers comprise prisms. 
     
     
         64 . The light fixture of  claim 62 , wherein the scattering centers comprise translucent contact points. 
     
     
         65 . The light fixture of  claim 62 , wherein the scattering centers comprise discontinuities in a surface of the light guide. 
     
     
         66 . The light fixture of  claim 48 , further comprising first and second optical extractors each positioned at an edge of the first and second light guides, respectively opposite the array of LEDs, each optical extractor being configured to receive light exiting the light guide and to direct the received light away from the light fixture. 
     
     
         67 . The light fixture of  claim 48 , wherein the LEDs are white LEDs