Projection type image display apparatus

Details Projection type image display apparatus Projection type image display apparatus

1989-10-18

1991-10-01

Hille, Rolf

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359 54, 359 49, G02F 113

Patent

active

050527835

ABSTRACT:
In a liquid crystal image display apparatus, an image of pixels of a liquid crystal display panel are projected onto a projection surface. The apparatus includes a light source, the liquid crystal display panel, microlens arrays provided respectively at a side of the liquid crystal display panel facing the light source and at another side thereof facing the projection surface, and a condenser lens provided between the light source and the microlens array located at the light source side of the display panel. The microlens arrays include a plurality of microlenses provided in positions corresponding to the plurality of pixels of the liquid crystal display panel, and pitches of the microlenses of the microlens array at the light source side are set to be larger than pitches of the pixels, while the pitches of the microlenses of the microlens array at the projection surface side are set to be smaller than those of the pixels.

REFERENCES:
patent: 4632522 (1986-12-01), Ishitani
patent: 4686519 (1987-08-01), Yoshida et al.
patent: 4765718 (1988-08-01), Henkes
patent: 4790632 (1988-12-01), Miyakawa et al.
patent: 4798448 (1989-01-01), Van Raalte
patent: 4807978 (1989-02-01), Grinberg et al.
patent: 4836652 (1989-06-01), Oishi et al.
patent: 4865425 (1989-09-01), Kobayashi et al.
patent: 4957351 (1990-09-01), Shioji

Affiliated with

Also associated with

Rating

Projection type image display apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Projection type image display apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Projection type image display apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1750454