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JINLING Chen
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KIM Chen
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Subject: LED Lighting-Indoor Lighting
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2009-12-17 |
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CREE or Osram LED and other information published by the industry, its
chip PN junction temperature Tj <75 ~ 85 ℃, can only ensure that
more than 85% of the working life under a light efficiency of up to 5
million hours and the PN junction to the chip itself, thermal film
(Tjs) temperature rise ΔT = 6 ~ 15 ℃ between the other LED light
efficiency and operating temperature is inversely proportional to
performance characteristics, each increase in 10 ℃, can lead to bad
light 3 ~ 6% and halve the life of the serious consequences of and the
general publicity LED can operate in 100 ~ 125 ℃ service life of up to
10 thousand hours of argument, but ignore this condition has resulted
in optical efficiency of 25 to 30 percent impairment of the concept of
a far cry from. |
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