. . "FIG. 21A is a plan view showing the basic configuration of the optical scanning-type touch panel according to the fourth embodiment of the present invention, and FIG. 21B is a cross-sectional view taken along line A-A??? of FIG. 21A. In FIGS. 21A and 21B, parts represented by the same reference numerals as FIG. 1 are the same members." . .