Picture display device with two microlens arrays

Details Picture display device with two microlens arrays Picture display device with two microlens arrays

1996-12-12

1998-08-25

Font, Frank G.

Optical: systems and elements

Single channel simultaneously to or from plural channels

By surface composed of lenticular elements

359622, 359623, 359624, G02B 2710

Patent

active

057988668

ABSTRACT:
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.w.sub.1 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.w.sub.2 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.w.sub.1 =.DELTA.w.sub.2 =.DELTA..sub.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.

REFERENCES:
patent: 3941475 (1976-03-01), Sheets
patent: 4626082 (1986-12-01), Mochizuki et al.
patent: 5098184 (1992-03-01), Van Den Brandt et al.

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