Liquid crystal display, control method thereof and electronic device with reduced flicker

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.

2. The liquid crystal display according to claim 1 , wherein the driving circuit is configured to apply a reset voltage for resetting a potential between the first electrode and the second electrode before applying the higher voltage or the lower voltage.

3. The liquid crystal display according to claim 1 , wherein the control circuit comprises a resistor interposed in a signal line which transmits the predetermined voltage to the second electrode; and a detection circuit detecting a voltage across the resistor, and

wherein the control circuit is configured to specify a current flowing through the second electrode based on the across-voltage detected by the detection circuit.

4. The liquid crystal display according to claim 3 , wherein the control circuit further comprises a low pass filter filtering the across-voltage detected by the detection circuit.

5. The liquid crystal display according to claim 1 , 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 includes:

a scanning line driving circuit selecting the scanning line;

a data line driving circuit supplying a data signal for the data line when the scanning line is selected; and

a common electrode driving circuit supplying the predetermined voltage for the common electrode.

6. The liquid crystal display according to claim 1 , wherein the control circuit is configured to detect a current flowing through the second electrode in relation to the liquid crystal elements disposed in an area other than a display area.

7. An electronic device display comprising the liquid crystal display according to claim 1 .