Surface light source device outputting polarized frontal illumin

Details Surface light source device outputting polarized frontal illumin Surface light source device outputting polarized frontal illumin

1996-11-19

2000-02-22

O'Shea, Sandra

Illumination

With polarizer

362 31, 362331, F21V 704

Patent

active

060272201

ABSTRACT:
The invention is a surface light source device capable of effectively producing polarized illumination light. The output angle of a representative beam C3 representing P-polarized component of output light from an emission surface 5 of the light guide plate 1 is about 75.degree.. Where P-polarization component of representative beam C3 is 100 (reference value), and the S-polarized component is 42.2. Representative beam C3 enters from an air layer AR to a flat surface 24g of a prism sheet 24, and then goes into the inside of prism sheet 24. At this stage the P-polarization component is 89.3 whereas the S-polarization component is 25.5. Beam C3 is incident on a slant surface 24d from its inside at an angle proximating the normal, and propagates into air layer AR between prism sheets 24, 34. Beam C3 impinges on a flat surface 34g of a prism sheet 34 while its corresponding part passes through the inside of prism sheet 34. At this stage its P-polarization component is 83.9 and its S-polarization component is 22.3. Beam C3 enters from the inside of one slope 34d of the prism array at the angle of incidence of 31.degree.. Its greater part is output to external air layer AR as illumination light substantially in the front direction.

REFERENCES:
patent: 5361190 (1994-11-01), Roberts et al.
patent: 5422756 (1995-06-01), Weber

Affiliated with

Also associated with

Rating

Surface light source device outputting polarized frontal illumin does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Surface light source device outputting polarized frontal illumin, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Surface light source device outputting polarized frontal illumin will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-515244