Lenticule and Prism Unit
First Claim
1. Lenticule-prism-unit, in particular for use in autostereoscopic displays, containing a lenticular array composed of a multitude of lenticules in the form of cylindrical lenses and a prism mask (PM) composed of prism mask elements which are aligned with the lenticules (L) of the lenticular array, characterised in that several prism mask elements are assigned to each lenticule (L), whereby this combination of lenticule and assigned prism mask elements discretely approximates an aspherical and/or asymmetric lenticule.
1 Assignment
0 Petitions
Accused Products
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.
42 Citations
11 Claims
- 1. Lenticule-prism-unit, in particular for use in autostereoscopic displays, containing a lenticular array composed of a multitude of lenticules in the form of cylindrical lenses and a prism mask (PM) composed of prism mask elements which are aligned with the lenticules (L) of the lenticular array, characterised in that several prism mask elements are assigned to each lenticule (L), whereby this combination of lenticule and assigned prism mask elements discretely approximates an aspherical and/or asymmetric lenticule.
-
2. Lenticule-prism-unit, wherein the prism mask elements are wedge elements (K1, K2, . . . ) and coplanar elements (P1, P2, . . . ).
Specification