An illustration (a) of FIG. 1 is a plan view schematically showing a display device 1 according to an embodiment, and an illustration (b) is an enlarged view of a portion A in the illustration (a). FIG. 2 is a cross-sectional view taken along a cross-section BB, shown in the illustration (a) of 1, of a display element 1 formed in a display region R1 of the display device 1.

The display device 1 is a small panel to be used for such a mobile appliance as a smartphone. The display device 1 includes: a display region R1 provided with a plurality of display elements D (equivalent to a “display element” in claims) formed in a matrix; and a frame region R2 disposed around the display region R1 and provided with an analysis pixel T (equivalent to an “analysis element” of claims). The analysis pixel T is disposed closer to a terminal unit disposed in a portion of the frame region R2.

Each of the display pixels D includes: a sub-pixel DR that glows red; a sub-pixel DG that glows green; and a sub-pixel DB that glows blue. The analysis pixel T includes: an analysis sub-pixel TR corresponding to the sub-pixel DR; an analysis sub-pixel TG corresponding to the sub-pixel DG; and an analysis-sub-pixel TB corresponding to the sub-pixel DB.

When observed from a direction perpendicular to the display region R1, the analysis sub-pixel TR is larger than the sub-pixel DR, the analysis sub-pixel TG is larger than the sub-pixel DG, and the analysis sub-pixel TB is larger than the sub-pixel DB. When observed from the perpendicular direction, each of the analysis sub-pixels TR, TG, and TB is shaped into a square a side of which has a length “d” of 50 μm or longer.