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In this paper, we discuss the light leakage issue of LCD panel occurred due to sharp temperature gradient and non-uniform stress distribution. By using numerical analysis and experiments, the relationship between light leakage and temperature gradient has been discovered. Thermal and stress simulations are applied in the analysis of light leakage phenomenon. Besides, we use simulation tools to predict the effectiveness of solutions for reducing the temperature gradient and stress distribution of LCD glass substrates. Finally, light leakage has been improved by using the rear frame with high thermal conductivity to reduce the temperature gradient and stress of the LCD panel.

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A numerical model has been developed to improve the quality of LCD module. By performing CFD analysis, heat transfer behavior for LCD module had been clarified. Designer can solve the issue of heat concentration produced by the electrodes of L shape CCFL to avoid the liquefaction of liquid crystal and the failure of compensation film. Experimental data is used to compare with simulation results and have a consistency in temperature distribution. The developed model has been used to predict the temperature distribution and evaluate the effects of different designs.