A display device comprising: a display panel assembly; a gate driver; a data driver connected to the display panel assembly; a gray voltage generator connected to the data driver; and a signal controller configured to control the gate driver and the data driver; wherein the display panel assembly comprises: a substrate having a rounded corner; a plurality of pixels disposed on the substrate; each of the plurality of pixels respectively comprising: a first subpixel (PX1r) configured to generate a first color; a second subpixel (PX1g) configured to generate a second color; and a third subpixel (PX1b) configured to generate a third color; a sum of the first color, the second color, and the third color generating a white color; the first subpixel (PX1r), the second subpixel (PXlg), and the third subpixel (PX1b) being arranged along a first direction; and a light blocking member disposed on a corner of the substrate and overlapping at least part of a first pixel of the plurality of pixels disposed at the rounded corner, wherein the data driver is configured to compensate the signal values of the first pixel to generate a lower luminance than a normal luminance, the normal luminance being the luminance of a pixel corresponding to an input signal value, wherein the first subpixel (PX1r) of the first pixel at least partially overlaps the light blocking member, and the data driver is configured to apply data voltages to the second subpixel (PX1g) and the third subpixel (PX1b) of the first pixel to generate the lower luminance. a display panel assembly; a gate driver; a data driver connected to the display panel assembly; a gray voltage generator connected to the data driver; and a signal controller configured to control the gate driver and the data driver; wherein the display panel assembly comprises: a substrate having a rounded corner; a plurality of pixels disposed on the substrate; each of the plurality of pixels respectively comprising: a first subpixel (PX1r) configured to generate a first color; a second subpixel (PX1g) configured to generate a second color; and a third subpixel (PX1b) configured to generate a third color; a sum of the first color, the second color, and the third color generating a white color; the first subpixel (PX1r), the second subpixel (PXlg), and the third subpixel (PX1b) being arranged along a first direction; and a light blocking member disposed on a corner of the substrate and overlapping at least part of a first pixel of the plurality of pixels disposed at the rounded corner, wherein the data driver is configured to compensate the signal values of the first pixel to generate a lower luminance than a normal luminance, the normal luminance being the luminance of a pixel corresponding to an input signal value, wherein the first subpixel (PX1r) of the first pixel at least partially overlaps the light blocking member, and the data driver is configured to apply data voltages to the second subpixel (PX1g) and the third subpixel (PX1b) of the first pixel to generate the lower luminance. a substrate having a rounded corner; a plurality of pixels disposed on the substrate; each of the plurality of pixels respectively comprising: a first subpixel (PX1r) configured to generate a first color; a second subpixel (PX1g) configured to generate a second color; and a third subpixel (PX1b) configured to generate a third color; a sum of the first color, the second color, and the third color generating a white color; the first subpixel (PX1r), the second subpixel (PXlg), and the third subpixel (PX1b) being arranged along a first direction; and a light blocking member disposed on a corner of the substrate and overlapping at least part of a first pixel of the plurality of pixels disposed at the rounded corner, wherein the data driver is configured to compensate the signal values of the first pixel to generate a lower luminance than a normal luminance, the normal luminance being the luminance of a pixel corresponding to an input signal value, wherein the first subpixel (PX1r) of the first pixel at least partially overlaps the light blocking member, and the data driver is configured to apply data voltages to the second subpixel (PX1g) and the third subpixel (PX1b) of the first pixel to generate the lower luminance. a first subpixel (PX1r) configured to generate a first color; a second subpixel (PX1g) configured to generate a second color; and a third subpixel (PX1b) configured to generate a third color; a sum of the first color, the second color, and the third color generating a white color; the first subpixel (PX1r), the second subpixel (PXlg), and the third subpixel (PX1b) being arranged along a first direction; and a light blocking member disposed on a corner of the substrate and overlapping at least part of a first pixel of the plurality of pixels disposed at the rounded corner, wherein the data driver is configured to compensate the signal values of the first pixel to generate a lower luminance than a normal luminance, the normal luminance being the luminance of a pixel corresponding to an input signal value, wherein the first subpixel (PX1r) of the first pixel at least partially overlaps the light blocking member, and the data driver is configured to apply data voltages to the second subpixel (PX1g) and the third subpixel (PX1b) of the first pixel to generate the lower luminance.