Patent ID: 7161652
Filing Date: 2007-01-09
Classification: C09K,G02F

Abstract:
1. A manufacturing method of a liquid crystal display device comprising a pixel substrate having pixel electrodes; a common substrate with a common electrode placed to face said pixel substrate; data lines for supplying a pixel voltage to be applied to said pixel electrodes; switching elements for controlling connection and disconnection between said pixel electrodes and said data lines by ON and OFF; scanning lines for supplying a control voltage for controlling ON and OFF of said switching elements; and a liquid crystal with spontaneous polarization sandwiched between said pixel substrate and said common substrate, wherein said liquid crystal shows a monostable state in which an average molecular axis of a director of liquid crystal molecules is aligned in a single direction when no voltage is applied, said method comprising the steps of: heating the liquid crystal; and applying the control voltage for controlling the state of said switching elements to said scanning lines and applying a different DC voltage to said data lines and said common electrode in a vicinity of a transition temperature from a higher temperature phase than chiral smectic C phase to the chiral smectic C phase in an alignment treatment which is performed to obtain the monostable state after heating; wherein said control voltage for controlling the state of said switching elements and the DC voltage applied to said data bus lines are at equal potential.