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Thermal‐deformation characterization on the panel of TFT‐LCD TV. Part I : Mechanism of color distortion
Author(s) -
Chu ChungYi,
Chan ChihPo,
Pan MinChun
Publication year - 2009
Publication title -
journal of the society for information display
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.578
H-Index - 52
eISSN - 1938-3657
pISSN - 1071-0922
DOI - 10.1889/jsid17.8.635
Subject(s) - backlight , liquid crystal display , distortion (music) , materials science , thermal , deformation (meteorology) , optics , thin film transistor , optoelectronics , physics , composite material , meteorology , amplifier , cmos , layer (electronics)
— In this study we applied both numerical simulation and experimental validation to characterize the thermal deformation of the panel and the direct‐lit backlight unit (BLU) of a thin‐film‐transistor liquid‐crystal‐display television (TFT‐LCD TV). Heat emitted from cold‐cathode fluorescent lamps (CCFLs) causes thermal deformation of the LCD and extrudes the panel from the metal front shield at both upper corners: this finally leads to color distortion. In the numerical simulation based on thermal‐fluidic fields of the TFT‐LCD TV, natural convection of air that surrounded the CCFLs resulted in a high temperature at the upper‐right and upper‐left corners of the LCD panel. Numerical results were verified by temperature measurements with good consistency. Additionally, this study has established a measurement system to characterize the temperature distribution on both the BLU and panel and the thermal deformation of the panel causing the color distortion.