Patent ID: 8339705

Claim:
A three-dimensional image display device comprising: a display unit to display two-dimensional images using unit pixels each including at least three colors of sub-pixels; and an optical sheet to convert the two-dimensional images into a plurality of different three-dimensional images, wherein the neighboring three-dimensional images are overlapped with each other by a predetermined range, wherein the optical sheet includes a base sheet and a plurality of curved lenses arranged parallel to each other on the base sheet, wherein each curved lens is tilted from a vertical direction of the sub-pixels by a gradient determined based on the base and height of a triangle corresponding to an intersection, where the curved lens is superimposed on the number M of horizontally arranged sub-pixels and the number N of vertically arranged sub-pixels, where M is a natural number and N is a natural number equal to or more than M, wherein the gradient of the curved lens is set to a value of tan −1 {(M×a horizontal pitch of the sub pixels)/(N×a vertical pitch of the sub pixels)}, wherein the plurality of curved lenses is tilted from a vertical direction of the base sheet by a gradient of 18.44 to 71.56 degrees, and wherein the neighboring three-dimensional images are overlapped with each other by 15% to 60% at the viewing angle except for a front viewing angle, wherein each of the sub-pixels has a square form having the same horizontal and vertical pitches as each other, and also, each unit pixel consists of red, green, blue, and white sub-pixels arranged in a Quad type, and has a square shape, wherein each of the sub-pixels are given by any one of image numbers from No. 1 to No. 15, and each of the sub-pixels to which the image numbers from No. 1 to No. 15 are given, are arranged in a matrix configuration of 3×5, wherein the width of each curved lens corresponds to the horizontally neighboring three sub-pixels.