Share Email Print
cover

Proceedings Paper

A novel temperature compensated operation scheme for trichromatic LED backlights
Author(s): Dong-Woo Lee; Jin-Ha Kim; Moo-Youn Park; Hee-Dong Kim; Jae-Kyuk Park; Soo-Ryong Hwang; Sung-Min Cho
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

Trichromatic LED backlights render higher color gamut and panel transmittance to liquid crystal displays (LCDs) than yellow phosphor-converted white LED backlights can possibly do at their best. In realization, however, several technical challenges arise, such as colour shift due to the ambient temperature change, decrease in brightness at elevated temperature, an enlarged dead zone for colour mixing, minimizing the total number of chips and so on. In this work, we designed and demonstrated a low-cost driving circuit that stabilizes brightness and colour coordinates of trichromatic LED backlights using a thermistor as a temperature compensating element. By applying the temperature compensation, the amounts of the brightness and colour shift were reduced to 54% and 51% of the uncompensated cases, respectively.

Paper Details

Date Published: 13 February 2007
PDF: 7 pages
Proc. SPIE 6486, Light-Emitting Diodes: Research, Manufacturing, and Applications XI, 648612 (13 February 2007); doi: 10.1117/12.710757
Show Author Affiliations
Dong-Woo Lee, Samsung Electro-Mechanics Co., Ltd. (South Korea)
Jin-Ha Kim, Samsung Electro-Mechanics Co., Ltd. (South Korea)
Moo-Youn Park, Samsung Electro-Mechanics Co., Ltd. (South Korea)
Hee-Dong Kim, Samsung Electro-Mechanics Co., Ltd. (South Korea)
Jae-Kyuk Park, Samsung Electro-Mechanics Co., Ltd. (South Korea)
Soo-Ryong Hwang, Samsung Electro-Mechanics Co., Ltd. (South Korea)
Sung-Min Cho, Samsung Electro-Mechanics Co., Ltd. (South Korea)


Published in SPIE Proceedings Vol. 6486:
Light-Emitting Diodes: Research, Manufacturing, and Applications XI
Klaus P. Streubel; Heonsu Jeon, Editor(s)

© SPIE. Terms of Use
Back to Top