| 摘要 |
A display element includes a light emitting unit that supplies light; and an angle converting unit including a reflection surface, an output surface, and a flat surface. The angle converting unit converts an angle of the light by reflecting the light toward the output surface. The light emitting unit is arranged in a matrix in two directions substantially perpendicular each other on a standard plane. An inequality 0<=t<p(p-d-f)(tan thetaa)/(p+d-f) is satisfied, where t is a distance between the flat surface and the output surface, p is a pitch of the light emitting unit arranged in a predetermined direction, d is a length of the light emitting unit, f is a length of the flat surface, and thetaa is an angle between the reflection surface and the standard plane.
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