The first paper of this series of papers explored the thermal deformation of a panel causing color distortion on TFT-LCD TV panels. The heat source from CCFLs leads to thermal deformation of the LCD panel that extrudes the metal front shield and degrades image quality. The second part of this series of papers proposes two solutions to tackle the thermal deformation of the panel and improve image quality. In addition to developing a reliable procedure for the characterization of this thermal phenomena on the LCD panel, the goal of this work is to consider and justify two design modifications through numerical analysis and experimentation to reduce thermal deformation and color distortion. One modification provides heat dissipation on the direct-lit BLU by opening apertures which effectively lower the temperature distribution in the BLU and on the panel without adding extra heat-dissipation modules. The other modification adds partition pads to reserve an appropriate gap between the panel and the front shield for the prevention of extrusions even after thermal deformation of the panel. The applied approaches for soothing color distortion can be broadened to other TFT-LCD TV products.
