Picture display device with two microlens arrays

摘要

Picture display device (1) comprising an illumination system (3) provided with a light source (5) for generating a light beam. The device (1) also comprises a picture display panel (9) having a matrix of pixels (10) for modulating said light beam in conformity with picture information to be displayed. A first microlens array (13) having a plurality of first lenses (15) and a pitch DELTA w1 is present between the illumination system (3) and the picture display panel 9. A second microlens array (17) having a plurality of second lenses (19) and a pitch DELTA w2 is present between the first microlens array (13) and the picture display panel (9). The focal planes of the two microlens arrays coincide and DELTA w1= DELTA w2= DELTA w applies to the pitches. The first lenses (15) have dimensions which are substantially equal to the dimensions of the second lenses (19). The illumination system (3) is adapted in such a way that the illumination system, when being in operation, supplies a plurality of sub-beams which are incident on the first microlens array at different, well-defined angles.