Patent ID: 7050020

Claim:
A three-dimensional (3D) image/two-dimensional (2D) image switching display apparatus comprising: display unit having a plural of pixel groups cyclically laid out each comprised of first to n-th pixels (n being an integer equal to or greater than 2); first optical unit which has first optical elements cyclically laid out in association with said individual pixel groups and refracts lights output from said pixels; and second optical unit which has second optical elements cyclically laid out in association with said individual pixel groups and refracts lights output from said first optical unit, wherein when images displayed by said first to n-th pixels differ from one another, said second optical unit is placed in relative to said first optical unit at a first position where said first and second optical unit output lights, output from said first to n-th pixels, in first to n-th directions different from one another, and when said first to n-th pixels display a same image independently, said second optical unit is placed in relative to said first optical unit at a second position which is set apart from said first position in a layout direction of said second optical elements by half a distance of a layout cycle of said second optical elements or by a distance equal to an integer multiple of said layout cycle of said second optical elements added to said half the distance and where said first and second optical unit output lights, output from said first to n-th pixels, in a same direction.