Tubular blue LED lamp with remote phosphor

• Main Authors: GEORGE, WILLIAM A, ANC, MARIA, GALVEZ, MIGUEL, SPEER, RICHARD
• Format: Patent
• Language: English; French; German
• Published: 07.04.2010
• Subjects: BLASTING; HEATING; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATINGELEMENTS; LIGHTING; MECHANICAL ENGINEERING; NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; WEAPONS

A lamp (40) includes a linearly extending heat sink (12), blue-light-emitting LEDs (14) mounted on the heat sink (12), and a light emitting cover mounted on the heat sink (12) in line with the LEDs (14), a first portion (44) of the cover opposite the LEDs (14) including a phosphor (20) that is excited by the LEDs (14) to emit white light. The cover may be a tube (49) with the LEDs (14) outside the tube, a portion of the tube (41) nearest the LEDs (14) being transparent and receiving light from the LEDs (14). The tube (42) may include reflectors (48) that are attached to an exterior surface of the tube (42) to hold the tube on the heat sink (42). Alternatively, the cover may enclose the LEDs (14) on the heat sink (12), where a portion of the cover has an interior surface that reflects light from the LEDs (14) to the first portion. The lamp (40) may include electrical connections that allow for multiple lamps to be connected in series.