Theoretical analysis of water droplet drying on different substrates on liquid crystal display panels heated with infrared radiation

To analyze the drying process of water droplets on glass panels in liquid crystal displays (LCDs), we calculated the evaporation time of water droplets under infrared radiation heating. Assuming that the water droplets mainly sit on either a glass substrate or copper circuit line in LCD panels, we theoretically analyzed the heat transfer mechanisms during the evaporation process of the water droplets on the different substrates by including substrate reflection. From the calculations, we found that heat conduction between the water droplets and the copper substrate plays an important role in the beginning of the evaporation, resulting in longer evaporation times due to heat loss. To confirm the mechanism, we calculated the drying time of 150 µm droplets in the substrates, comparing the conduction and radiation energy. Finally, we calculated the process parameters of water droplet drying in the LCD industry.