A complementary matching technique to reduce the variance of optical and electrical properties of light-emitting diodes

作者：Lin Guan Bo^*; Schubert Martin F; Cho Jaehee; Schubert E Fred; Kim Hyungkun

来源：Journal of the Society for Information Display, 2011, 19(6): 431-434.

DOI：10.1889/JSID19.6.431

• LED backlighting
• color uniformity
• complementary LEDs

Light-emitting diodes (LEDs) using phosphor conversion inherently have a wide variation of multiple parameters, including correlated color temperature (CCT), light output power (LOP), and forward voltage V-F. A method, based on the formation of LED pairs with complementary characteristics, is presented to produce LED-based light sources with narrow CCT, LOP, and V-F distributions. A weighted matching algorithm was developed to select LED pairs under a multiple selection criteria. Based on the weighted matching algorithm, 96 LEDs were combined to form 48 LED pairs, and it was experimentally demonstrated that the variance of LED CCT and LOP distributions decreased by 93% and 71%, respectively.

• 出版日期2011-6