Optical components and light emitting devices comprising...

Details Optical components and light emitting devices comprising... Optical components and light emitting devices comprising...

2010-08-30

2011-10-11

Husar, Stephen F (Department: 2875)

Illumination

With polarizer

C362S558000, C362S560000, C362S607000, C362S613000, C362S627000, C359S483010, C359S493010

Reexamination Certificate

active

08033674

ABSTRACT:
The present invention provides a polarization-sensitive light homogenizer and a backlight and display using the same. The homogenizer improves the spatial luminance and color uniformity, increases the luminance in a direction normal to the homogenizer and provides increased luminance through polarized light recycling within the light homogenizer and backlight. In one embodiment, the homogenizer includes a polarization-sensitive anisotropic light-scattering (PDALS) region, a non-polarization-sensitive anisotropic light-scattering region, and a substantially non-scattering region. In a further embodiment, the non-scattering region is birefringent. The spatially non-uniform incident light flux from a backlight including one or more non-extended light emitting sources is scattered efficiently by the NPDASL region and is incident on the PDALS region which backscatters light orthogonal to the polarization state desired for efficient illumination of a liquid crystal display panel. The NPDASL and the PDALS form a multiple reflection cavity that will increase the spatial luminance while improving the light recycling of the appropriate polarization state. In a further embodiment the light homogenizer includes at least one of a light collimating region and a light re-directing region.

REFERENCES:
patent: 6179948 (2001-01-01), Merrill et al.
patent: 6995820 (2006-02-01), Amimori et al.
patent: 7784954 (2010-08-01), Coleman

Affiliated with

Also associated with

Rating

Optical components and light emitting devices comprising... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Optical components and light emitting devices comprising..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical components and light emitting devices comprising... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4262927