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- W2023140685 abstract "Abstract Recently, white light-emitting diodes (WLEDs) have been regarded as next-generation light sources. However, a key issue with WLEDs is the halo phenomenon which is always found in conventional lamp LEDs. In this paper, patterned and unpatterned phosphor plates were used as a comparison set. For the patterned case, a laser line with a diameter varying from 0.05 mm to 0.1 mm was drawn with a square dimension along the LED chip. The correlated color temperature (CCT) of white LEDs can be well controlled by varying the thickness of the phosphor. It was found that a white light point can be easily achieved when the deposition time was about 9 min. It was also found that, for the patterned case, when the distance from the central point was 3.8 mm, the CCT difference was 152 K, which is smaller than the unpatterned case, which had a CCT of 268 K." @default.
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- W2023140685 date "2011-07-01" @default.
- W2023140685 modified "2023-09-27" @default.
- W2023140685 title "Using a laser scribed electrophoretic phosphor plate to reduce the yellow halo emitting from YAG-based white LEDs" @default.
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- W2023140685 doi "https://doi.org/10.1016/j.cap.2011.02.028" @default.
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