a display panel including a display region overlapping a plurality of pixels in a plan view and having a first side surface and a second side surface opposite to the first side surface, the plurality of pixels being arranged in a matrix of rows and columns;

a light source device disposed on a side of the first side surface and configured to emit light that enters the display panel from the first side surface; and

a drive circuit configured to calculate an output gradation value based on an input gradation value included in an image signal and to output a pixel drive signal corresponding to the output gradation value to a corresponding one pixel of the plurality of pixels, wherein

the plurality of pixels include a first pixel and a second pixel that are arranged in a first direction from the first side surface toward the second side surface,

the second pixel is disposed between the first pixel and the second side surface, and

when the input gradation value corresponding to the first pixel is equal to the input gradation value corresponding to the second pixel, the drive circuit is configured to set the output gradation value corresponding to the second pixel to be larger than the output gradation value corresponding to the first pixel.