Patent ID: 8362975

Claim:
A display device, comprising: a display part in which a plurality of display units each containing a main pixel for displaying a first image and a sub-pixel for displaying a second image are arranged in matrix in a first direction and a second direction that crosses with the first direction; and an optical member provided by being corresponded to each of the display units for distributing light emitted from the display units to different directions at least along the first direction, wherein a display area of the display unit includes a first display area in which the main pixel and the sub-pixel are formed in the second direction, wherein a second display area in which only the main pixel is formed in the second direction, wherein the optical member is configured with a lenticular lens in which cylindrical lenses are arranged by corresponding to each of the display units arranged at least along the first direction, and wherein the display unit has a structure in which the main pixel is formed in a flat T-letter shape having a longitudinal-bar part extended in the second direction, and the sub-pixel is arranged, respectively, on both sides of the longitudinal-bar part in the first direction; and width P 1 of the longitudinal-bar part in the first direction satisfies following Expressions: P 1≦( P×L/e/I )×(( OD^ 2 +e^ 2)^0.5 −I ); and I= 1/( n /( H^ 2 +P^ 2)^0.5−( n− 1)/ r ), where pitch of the display units in the first direction is P, pitch of the cylindrical lenses in the first direction is L, refractive index of the cylindrical lens is n, distance between a principle point of the cylindrical lens and the display unit is H, observing distance is OD, and cycle of enlarged projection images of the display units at the observing distance OD is e.