Projection-type color liquid crystal display device having non o

Details Projection-type color liquid crystal display device having non o Projection-type color liquid crystal display device having non o

1997-06-06

2000-12-19

Malinowski, Walter

Liquid crystal cells, elements and systems

Liquid crystal system

Projector including liquid crystal cell

349 95, 353 31, 353 38, G02F 11335, G03B 2100, G03B 2114

Patent

active

061633496

ABSTRACT:
A microlens array is provided on a light-outgoing side of a monochromic LCD element having a plurality of pixels each corresponding to any one of the three colors R, G, and B. Microlenses of the microlens array respectively correspond to pixel groups each of which is composed of three pixels corresponding to the three colors R, G, and B, respectively. Light fluxes having passed through the microlens array are converged at an entrance pupil position of a projection lens by a field lens and form pixel enlarged images corresponding to the colors R, G, and B. At the entrance pupil position, there is provided a color filter having color regions which respectively correspond to the colors to which the pixel enlarged images correspond. With this arrangement, it is possible to make a diverging angle smaller, at which light passing through the LCD element and the microlens array and being converged on the projection lens by the field lens is diverged. Therefore, there is no need to make the projection lens have a great diameter. As a result, it is possible to provide a projection-type color LCD device having a single-panel arrangement which can be produced at lower costs.

REFERENCES:
patent: 5056912 (1991-10-01), Haada et al.
patent: 5126863 (1992-06-01), Otsuka et al.
patent: 5187599 (1993-02-01), Nakanishi et al.
patent: 5623348 (1997-04-01), Ogino
patent: 5633737 (1997-05-01), Tanaka et al.
patent: 5760849 (1998-06-01), Omae et al.

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