Patent ID: 8907936
Filing Date: 2014-12-09
Classification: G09G

Abstract:
1. A liquid crystal display comprising: liquid crystal elements, in each of which a liquid crystal layer is sandwiched by a first electrode and a second electrode; a driving circuit configured to alternately apply higher and lower voltages than a predetermined voltage to the first electrode, and, at the same time, to apply the predetermined voltage to the second electrode; and a control circuit configured to compare a first current with a second current, the first current being obtained by excluding an instantaneous current due to application of a related higher voltage from currents flowing through the second electrode after the higher voltage is applied to the first electrode and identifying a second higher current peak appearing from the time of the application of the higher voltage, and the second current being obtained by excluding an instantaneous current due to application of a related lower voltage from currents flowing through the second electrode after the lower voltage is applied to the first electrode and identifying a second lower current peak appearing from the time of the application of the lower voltage, comparing the second higher current peak and the second lower current peak, determining whether a difference between the second higher current peak and the second lower current peak is within a predetermined threshold value, and if the difference between the second higher current peak and second lower current peak is within the predetermined threshold value, maintaining a level of the predetermined voltage, whereas if the difference exceeds the predetermined threshold value, determining if the second higher current peak is greater than the second lower current peak and if the second higher current peak is greater than the second lower current peak, increasing the level of the predetermined voltage and if the second higher current peak is equal to or less than the second lower current peak, decreasing the level of the predetermined voltage.