Feasibility study of edge-lit backlight of dual-panel display by a simple configuration model

This study proposes a feasibility study of edge-lit backlight of dual-panel display by a simple configuration model based on a luminous flux flow perspective. The model is applied to investigate the interaction between the backlight configuration parameters, including the dot density of the light guide and the reflectances of the upper and lower films and the lower reflector sheet, respectively. The results show that the luminance difference between the main panel and the sub-panel is determined primarily by the dot reflectance in the region of the light guide common to the two panels and by the reflectances of the upper and lower films, respectively. To maximize the main panel luminance, higher reflectance values should be assigned to the dots in the non-common region of the light guide and to the lower reflector sheet. The dot reflectance in the non-common region is highly sensitive to changes in the value of the dot density in the common region. Finally, the dot density in the common region and the dot density in the non-common region are related by a quadratic function in which the rate of increase of the dot density in the common region is greater than that in the non-common region.