Illumination device, projection video display device, and...

Details Illumination device, projection video display device, and... Illumination device, projection video display device, and...

2011-08-02

2011-08-02

Ko, Tony (Department: 2878)

Optics: image projectors

Unitary plural refracting surfaces

C359S619000, C359S599000

Reexamination Certificate

active

07988300

ABSTRACT:
An illumination device includes a light source for emitting a light flux having a solid angle; an optical element for converging the light from the light source in at least one direction to convert the light into parallel light; and a fly-eye lens for allowing incidence of the parallel light from the optical element to guide uniform light to an area for illumination. Assuming that a certain number of lens cells in the fly-eye lens in a column direction or a row direction are defined as a lens cell unit, one of the lens cell units is relatively displaced with respect to the other one of the lens cell units in the column direction or the row direction, and the number of steps for displacement among the lens cell units in the fly-eye lens is set to 2 or more.

REFERENCES:
patent: 4132468 (1979-01-01), Lo et al.
patent: 09-090510 (1997-04-01), None

Affiliated with

Also associated with

Rating

Illumination device, projection video display device, and... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Illumination device, projection video display device, and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Illumination device, projection video display device, and... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2666593