TOUCH PANEL, DISPLAY DEVICE AND OPTICAL SHEET, AND METHOD OF SELECTING OPTICAL SHEET AND METHOD OF MANUFACTURING OPTICAL SHEET

摘要

PROBLEM TO BE SOLVED: To provide a touch panel that can prevent glare of a super-high definition display element with a pixel density of 300 ppi or more, and prevent a reduction in the resolution of the super-high definition display element.SOLUTION: There is provided a touch panel including an optical sheet as a component member and used for the front face of a display element with a pixel density of 300 ppi or more, where the optical sheet has a rugged shape on one surface. When the optical sheet is irradiated perpendicularly with a visible ray from a direction of a surface of the optical sheet on the opposite side of the surface having the rugged shape, and the intensity of the ray transmitted through the optical sheet is measured at every angle within a range from -15 degrees to +15 degrees including 0 degree from the surface having the rugged shape, and the total sum of the measured transmission intensities is defined as Pand the transmission intensity measured at 0 degree is defined as Q, Pand Q satisfy the following formula (I): 0.650≤(P-Q)/P≤0.850.