Patent ID: 9368075
Filing Date: 2016-06-14
CPC Classification: G09G

Claim Text:
1. A method of driving a dual mode liquid crystal display device comprising first and second substrates facing and spaced apart from each other, the first and second substrates including a plurality of pixel regions, a first electrode in each of the plurality of pixel regions on an inner surface of the first substrate, a second electrode on an inner surface of the second substrate, third and fourth electrodes on one of the inner surfaces of the first and second substrates, the third and fourth electrodes spaced apart from each other, and a liquid crystal layer between the first and second substrates, the liquid crystal layer including a liquid crystal and a chiral dopant, the method comprising: a first step of applying a first horizontal electric field to the liquid crystal layer for a first duration time during a reset period of a memory mode, the first duration time longer than a frame; a second step of eliminating the first horizontal electric field and keeping the liquid crystal layer without the first horizontal electric field for a second duration time during the reset period of the memory mode; a third step of applying a first vertical electric field corresponding to a static image for a third duration time during a writing period of the memory mode, the third duration time longer than the frame; a fourth step of eliminating the first vertical electric field and keeping the liquid crystal layer without the first vertical electric field for a fourth duration time during the writing period of the memory mode; a fifth step of applying a second vertical electric field to the liquid crystal layer for a fifth duration time during a reset period of a dynamic mode, the fifth duration time longer than the frame; a sixth step of eliminating the second vertical electric field and keeping the liquid crystal layer without the second vertical electric field for a sixth duration time during the reset period of the dynamic mode; and a seventh step of applying a third vertical electric field corresponding to a moving image during a writing period of the dynamic mode.