Details

Autor(en) / Beteiligte

• Sheu, J.K.
• Chang, S.J.
• Kuo, C.H.
• Su, Y.K.
• Wu, L.W.
• Lin, Y.C.
• Lai, W.C.
• Tsai, J.M.
• Chi, G.C.
• Wu, R.K.

Titel

White-light emission from near UV InGaN-GaN LED chip precoated with blue/green/red phosphors

Ist Teil von

• IEEE photonics technology letters, 2003-01, Vol.15 (1), p.18-20

Ort / Verlag

New York: IEEE

Erscheinungsjahr

2003

Quelle

IEEE Electronic Library Online

Beschreibungen/Notizen

• Phosphor-converted light-emitting diodes (LEDs) were fabricated by precoating blue/green/red phosphors onto near ultraviolate (n-UV) LED chips prior to package into LED lamps. With a 20-mA injection current, it was found that the color temperature T/sub c/ was around 5900 K and the color-rendering index R/sub a/ was around 75 for the "n-UV+blue/green/red" white LED lamps. It was also found that no changes in color temperature T/sub c/ and color-rendering index R/sub a/ could be observed when we increased the injection from 20 to 60 mA. These results indicate that such "n-UV+blue/green/red" white LEDs are much more optically stable than the conventional "blue+yellow" LEDs.