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Abstract

This invention relates to a lenticule-prism-unit and to an illumination device for an autostereoscopic display. The display comprises (seen in the direction of light propagation) an illumination matrix (7), a projection matrix (8) and a transmissive image matrix (5). The illumination matrix consists of a multitude of controllable illumination elements (21). The projection matrix (8) focuses the light of these illumination elements (21) such that the image matrix (5) and a preferred visibility region (6) are illuminated in a directed manner. According to this invention, the projection matrix (8) comprises a lenticular array (LM) and a prism mask (PM) with wedge elements (K1, K2, . . . ) and coplanar elements (P1, P2, . . . ). The elements (K1, K2, . . . , P1, P2, . . . ) are arranged such that a multiple number of projections of the light of an illumination element (21) are projected into the visibility region (6), thus generating a broadened resultant luminance distribution (V) stretching from (A) to (C'). The resultant projections of laterally adjacent illumination elements are overlapped at their margins, thus creating a near-homogeneous luminance distribution (V). The image quality increases considerably thanks to the homogeneous brightness thus achieved.

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First Claim