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JINLING Chen
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KIM Chen
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Subject: Automotive LED-1156 12UHP
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2009-12-17 |
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Nichia
in early 2009 revealed that laboratory, LED luminous efficiency gains
to 249lm / W PhotonicsWest exhibition recently on the Japanese LED
maker Nichia (Nichia) published in early 2009, the laboratory results,
LED luminous efficiency in the case of 20mA up to 249 lumens per watt,
but the LED industry, commonly used in the general current of 350mA ,
the luminous efficiency is reduced to 145lm / W, caused concern to the
industry. Nichia-oriented foreign Takashi Mukai, said this change
generated by the current decline in the luminous efficiency may be
there are some problems in the manufacturing process. He pointed out
that the maximum theoretical efficiency of white LED up to 263 lumens
per watt, but if a new phosphor technology, Nichia could this limit to
300 lumens per watt. With Japan and Asia compared to the results of
laboratory, the U.S. LED maker Cree's light emitting efficiency of
public figures are 161 lumens per watt, while the Osram is 136 lumens
per watt, is to 350mA current drive under test.
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