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Temperature compensated operation for small trichromatic LED backlight  

Lee, Dong-Woo (Samsung Electro-Mechanics Co., Ltd.)
Park, Mu-Youn (Samsung Electro-Mechanics Co., Ltd.)
Hwang, Soo-Ryong (Samsung Electro-Mechanics Co., Ltd.)
Kim, Jin-Ha (Samsung Electro-Mechanics Co., Ltd.)
Publication Information
Journal of the Institute of Electronics Engineers of Korea SC / v.43, no.6, 2006 , pp. 33-39 More about this Journal
Abstract
Trichromatic LED backlight renders higher colour gamut and panel transmittance to the LCDs than the phosphor-converted white LED backlight. In realization, however, several technical challenges arise, such as colour shift, due to the ambient temperature change, brightness decrease along with the temperature increase, colour mixing, minimizing the total number of chips and so on. In this paper we designed and tested the low cost temperature compensating circuit, using a thermistor as a temperature compensating element, for stabilizing the brightness and maintaining the colour coordinates of the trichromatic backlight units. By applying the temperature compensating circuit, the decrement rate of the brightness and colour shift rate were achieved by 54% and 51% respectively comparing with uncompensated case.
Keywords
LED;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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