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[13] [14] Nakamura continued to develop the blue LED on his own and in 1993 succeeded in making the device. [15] [14] Despite these circumstances, once Nakamura succeeded in creating a commercially viable prototype, 3 orders of magnitude (1000 times) brighter than previously successful blue LEDs, Nichia pursued developing the marketable product.
Ambulance in Zlín, Czech Republic, With blue LED lights. Emergency vehicles are permitted to display blue or combination of blue and red emergency lights and an audible warning signal (such as a siren) pursuant to § 41 of Act No. 361/2000, [36] which grants them the ability to ignore certain traffic laws.
The reverse function was only achievable with the introduction of blue LEDs; by mixing red, green and blue LEDs in a defined distributed pattern behind a lens, white light was produced that conformed to the legal requirements of a reverse light. In North America, the 2000 Cadillac Deville was the first passenger car with LED taillights. [144]
Studies have been conducted on blue light filtering eyeglasses, [5] [27] which uses special blue light blocking lenses for eye protection against blue light. [ 27 ] [ 28 ] All visible light wavelengths can be transmitted through the spectacle lens, [ 28 ] but some portions of the blue-violet light spectrum are selectively attenuated by coating ...
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This method involves coating LEDs of one color (mostly blue LEDs made of InGaN) with phosphors of different colors to form white light; the resultant LEDs are called phosphor-based or phosphor-converted white LEDs (pcLEDs). [32] A fraction of the blue light undergoes the Stokes shift, which transforms it from shorter wavelengths to longer.
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