Referring to FIG. 1, controller 30 receives input image signal Data transmitted from an external system (not illustrated), and outputs the image data and various timing signals in order to control source driver 24 and gate driver 25 based on received input image signal Data. Similarly to the liquid crystal display device of the comparative example, controller 30 performs the writing processing (thinning-out drive) for every N line (N is an integer of 1 or more) in each frame. That is, controller 30 writes the data voltage for each predetermined pixel row in the plurality of pixel rows 22 in one frame in the plurality of frames, and gate driver 25 and source driver 24 control presence or absence of the writing of the data voltage in each of the plurality of pixel rows 22 in the plurality of frames. The first exemplary embodiment is characterized in that the data voltage is also supplied to pixel row 22 (non-writing line) in which the writing should not be performed in the frame when controller 30 satisfies a predetermined condition. Specifically, the first exemplary embodiment is characterized in that controller 30 determines whether a correlation exists between the images of the non-writing line and the writing line, and controls gate driver 25 and source driver 24 based on a determined result.
Controller 30 includes image input unit 31, determination unit 32, memory 33, drive line switching unit 34, source drive controller 35, and gate drive controller 36. For example, controller 30 may control the drive of the backlight.
