Liquid crystal cells – elements and systems – Particular structure – Having significant detail of cell structure only
Reexamination Certificate
2008-01-29
2008-01-29
Ton, Toan (Department: 2871)
Liquid crystal cells, elements and systems
Particular structure
Having significant detail of cell structure only
C349S115000, C359S494010
Reexamination Certificate
active
07324181
ABSTRACT:
The present invention relates to the field of color filters, in particular, to a non-absorbing polarization color filters and to high-brightness color liquid crystal display panel with improved image contrast employing non-absorbing polarization color filters and light recycling among neighboring subpixels. The disclosed invention represents a non-absorbing polarization color filter comprising the following elements: a rear broadband multilayer lossless polarizer, a front broadband multilayer lossless polarizer, and a color polarization rotator. The rear broadband multilayer lossless polarizer has a predefined-oriented transmission axis AB. Said front broadband multilayer lossless polarizer is located approximately in parallel with the rear broadband multilayer lossless polarizer, and has a transmission axis approximately parallel or approximately orthogonal with respect to transmission axis AB. The color polarization rotator is located between the front broadband multilayer lossless polarizer and the rear broadband multilayer lossless polarizer. Said color polarization rotator comprises a stack of thin birefringent films with c-axes orientations alternated in sign according to a rocking angle α with respect to orientation of the transmission axis AB. A number, a rocking angle α, thicknesses and optical anisotropies of thin birefringent films are selected so, that the non-absorbing polarization color filter transmits a predetermined color light having the polarization state approximately parallel to transmission axis AB, reflects said predetermined color light having the polarization state orthogonal to the transmission axis AB, and reflects an unpolarized light of other predetermined color.
REFERENCES:
patent: 6174394 (2001-01-01), Gvon et al.
patent: 6847420 (2005-01-01), Lazarev et al.
patent: 6943858 (2005-09-01), Lyu et al.
patent: 7079208 (2006-07-01), Kim et al.
patent: 7079209 (2006-07-01), Nakagawa
patent: 2003/0164914 (2003-09-01), Weber et al.
Lazarev, P., et al.,Displays, Materials and Components,Proceedings of the 7thInternational Workshop, Kobe Japan, Nov. 29, 2000, pp. 1159-1160.
Lazarev Pavel I.
Paukshto Michael V.
Silverstein Louis D.
Yeh Pochi
Nitto Denko Corporation
Ton Toan
Westerman, Hattori, Daniels & Adrian , L.L.P.
LandOfFree
Non-absorbing polarization color filter and liquid crystal... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Non-absorbing polarization color filter and liquid crystal..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Non-absorbing polarization color filter and liquid crystal... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2804982