Reduced contrast LED lighting system

摘要

A reduced contrast LED lighting system is disclosed. A plurality optical elements in a fixture is arranged to produce a light pattern with reduced visible contrast between the various areas where light can be perceived leaving the fixture. In some embodiments of the invention the LED light source is disposed at the reflector, and in some such embodiments a partially reflective lens plate is disposed opposite the LED light source. In some embodiments the LED light source is placed opposite the reflector. The lighting system can include a lens arrangement with a partially reflective lens plate connected to a heatsink, or two lens plates adjacent to the LED light source and the heatsink. The fixture can include a plurality of light pipes or slots to direct light into spaces between the lens plates and the heatsink.

主权项

1. A light fixture comprising:
a back reflector including a flat central region; a heatsink including a mounting surface and fins; a plurality of LED devices on the mounting surface of the heatsink, the LED devices facing the flat central region of the back reflector; at least two lens plates adjacent to the heatsink; and a plurality of slots in a curved portion of the lens plates or light pipes through the curved portion of the lens plates, the slots or light pipes disposed to direct a portion of light from the LED devices into spaces between the curved portions of the lens plates and the fins of the heatsink so that a perceived intensity of the light from various areas including a space taken up by the heatsink does not vary by large amounts.