disclosed herein are heat treatment apparatuses and methods for liquid crystal display cells , which are capable of rapidly transferring heat to liquid crystals injected into an lcd cell , not only to reduce the time taken for the liquid crystals to be changed into a liquid phase , but also to physically promote diffusion of the liquid crystals , thereby achieving a more uniform distribution of the liquid crystals . the apparatus includes a liquid bath , in which a liquid is contained as a medium to transfer heat to the liquid crystals in the lcd cells , a loading device to load or unload the lcd cells into / from the liquid bath , a heater installed in the liquid bath , the heater heating the liquid contained in the liquid bath and transfer heat to the liquid crystals , and a sound wave transmitter installed in the liquid bath and transmitting sound waves to the liquid crystals .