Display device and method

A display device comprising:

• a display panel comprising a display area in which first pixels and second pixels are arranged along a first direction and a second direction intersecting the first direction;
• a light source;
• a light guide comprising an end portion opposing the light source;
• and.
• a prism sheet interposed between the light guide and the display panel and comprising a plurality of prisms extending along a third direction inclined with respect to the second direction by an acute angle of inclination, wherein
• each of the first pixels includes a first red sub-pixel, a first green sub-pixel and a blue sub-pixel,
• each of the second pixels includes a second red sub-pixel, a second green sub-pixel and a white sub-pixel,
• when an angle made between an extending direction of the prisms and the second direction while a luminance distribution of the sub-pixels in the display area is in a most uniform state is defined as an ideal angle, a first ideal angle specific to a first sub-pixel having a highest luminance among the first red sub-pixel, the second red sub-pixel, the first green sub-pixel, the second green sub-pixel, the blue sub-pixel and the white sub-pixel is different from a second ideal angle specific to a second. sub-pixel having a second highest luminance among the first red sub-pixel, the second red sub-pixel, the first green sub-pixel, the second green sub-pixel, the blue sub-pixel and the white sub-pixel, and
• the acute angle of inclination is an average of the first ideal angle and the second ideal angle.