Combination turn and tail multi-color LED lamp

摘要

An automotive combined turn signal and tail/stop lamp (10) having co-axial transparent collimating inner and outer light guides (18, 30). Inner collimating light guide (18) receives light from a yellow LED (16), outer collimating light guide (30) receives light from red LEDs (14), the yellow and red LEDs located in thermal communication with a common heat sink (2). Mirror optics (40, 42) reflect light from respective light output prisms (28, 35) of the inner and outer light guides outward to nested reflectors on the automobile. Electrical conductors (48) between the light guides (18, 30) can feed power from a PC board (12) to supply additional light sources within an RCL housing, such as white back-up light.

主权项

1. A vehicle light module (10) LED combination lamp having a first indicator lamp and a second indicator lamp, comprising:
a heat sink (2) and a printed circuit board (12) in thermal communication with said heat sink (2), said printed circuit board having disposed thereon a plurality of LEDs, said plurality of LEDs comprising a first LED (16) emitting a first color adapted to form said first indicator lamp and a plurality of second LEDs (14) in surrounding relation to said first LED (16), said plurality of second LEDs (14) emitting a second color different from said first color wherein said second color is adapted to form said second indicator lamp; a transparent collimating inner light guide (18) in optical communication with said first LED (16), said first inner guide defining a central optical longitudinal lamp axis (50) extending away from said printed circuit board; a transparent collimating outer light guide (30) in optical communication with said plurality of second LEDs (14), said outer light guide (30) defining an internal cavity (46) such that said outer light guide (30) is, in a radial direction, disposed around said inner light guide (18); said inner light guide (18) having
a first light input region (20) proximal said printed circuit board (12),a first light output region (22) distal from said printed circuit board (12), anda first central portion (24) configured to pass light received from said first light input region (20) toward said first light output region (22),said first light output region (22) defining a first reflecting surface (28) positioned to reflect light incident thereon away from the lamp axis (50); a first mirror (40) mounted proximate said inner light guide (18) in optical communication with light from said first LED (16) exiting said first light output region (22); said outer light guide (30) having
a second light input region (32) proximal said printed circuit board (12),a second light output region (34) distal from said printed circuit board (12), anda second central portion (38) configured to pass light received from said second light input region (32) toward said second light output region (34),said second light output region (34) defining a second reflecting surface (35) positioned to reflect light incident thereon away from the lamp axis (50); and a second mirror (42) mounted adjacent the second light output region in optical communication with light from said plurality of second LEDs (14) exiting said second light output region (34).