Patent ID: 8704741

Claim:
A liquid crystal display comprising: a liquid crystal element in which a liquid crystal layer is sandwiched by a first electrode and a second electrode; a driving circuit configured to apply, between the first electrode and the second electrode, a voltage for resetting a voltage maintained in the liquid crystal element and thereafter to apply, to the first electrode, a voltage higher than a predetermined voltage and a voltage lower than the predetermined voltage at different timings; a detection circuit configured to detect a current flowing through the second electrode; a comparison circuit configured to designate, as a reference value, the current flowing through the second electrode when the voltage maintained in the liquid crystal element is reset, to specify a first current which is obtained by excluding a charging current due to application of a related higher voltage from currents flowing through the second electrode when the higher voltage is applied to the first electrode, and a second current which is obtained by excluding a charging current due to application of a related lower voltage from currents flowing through the second electrode when the lower voltage is applied to the first electrode, and to compare the first current with the second current; and a control circuit configured to control the first current and the second current based on the comparison result, wherein the first electrode is a pixel electrode which is coupled to a data line via a switching element turned on when a scanning line is selected; and the second electrode is a common electrode, wherein the driving circuit comprises: a scanning line driving circuit selecting the scanning line; a data line driving circuit supplying a data signal for the data line at the selection period; and a common electrode driving circuit supplying the common voltage for the common electrode; wherein the comparison circuit is configured to compare an integral value for the first current with an integral value for the second current and integrate the first current and the second current for a portion of a vertical scanning period.