DOI: 10.1126/science.279.5352.835. Incorporation of Photoluminescent Polarizers into Liquid Crystal Displays

Incorporation of Photoluminescent Polarizers into Liquid Crystal Displays

10.1126/science.279.5352.835

Crossref journal-article

American Association for the Advancement of Science (AAAS)

Science (221)

Abstract

Liquid crystal displays, the dominant flat panel display technology, are limited in brightness and energy efficiency because of the use of absorbing polarizers and color filters. Liquid crystal–based photoluminescent display devices have been fabricated that use thin, polarized photoluminescent layers that have highly anisotropic absorption or emission. These layers both polarize light and generate bright color. This approach can simplify device design and substantially increase device brightness, contrast, efficiency, and (in specific configurations) viewing angle.

Authors 5

Christoph Weder (first)
Christian Sarwa (additional)
Andrea Montali (additional)
Cees Bastiaansen (additional)
Paul Smith (additional)

References 25 Referenced 296

For a recent review see H. Kobayashi Proc. SPIE 1910 15 (1993). (10.1117/12.151162)
For a recent review see D. Bradley Curr. Opin. Solid State Mater. Sci. 1 789 (1996). (10.1016/S1359-0286(96)80103-3)
L. K. M. Chan in The Encyclopedia of Advanced Materials D. Bloor R. J. Brook M. C. Flemings S. Mahajan Eds. (Elsevier Science Oxford 1994) vol. 2 pp. 1294–1304.
F. Funada M. Matsuura T. Wada U.S. Patent 4 336 980 (1982)
H. J. Coles Liq. Cryst. 14 1039 (1993). (10.1080/02678299308027811)
Baur G., Greubel W., Appl. Phys. Lett. 31, 4 (1977); (10.1063/1.89476) / Appl. Phys. Lett. by Baur G. (1977)
; M. Bechtler and H. Krüger Electronics 50 (25) 113 (1977).
W. A. Crossland I. D. Springle A. B. Davey Proc. SID Symp. Digest of Technical Papers (Society for Information Display Santa Ana CA 1997) vol. 27 pp. 837–840.
E. Lommel Ann. Phys. Chem. 8 634 (1879). (10.1002/andp.18792441209)
T. W. Hagler et al. Polymer Comm. 32 339 (1991); (10.1136/gut.32.3.339-b)
Hagler T. W., Pakbaz K., Heeger A. J., Phys. Rev. B 44, 8652 (1991). (10.1103/PhysRevB.44.8652) / Phys. Rev. B by Hagler T. W. (1991)
Dyreklev P., et al., Adv. Mater. 7, 43 (1995); (10.1002/adma.19950070108) / Adv. Mater. by Dyreklev P. (1995)
; G. Lüssem et al. Liq. Cryst. 21 903 (1996); (10.1080/02678299608032908)
Cimrova V., Remmers M., Neher D., Wegner G., Adv. Mater. 8, 146 (1996). (10.1002/adma.19960080209) / Adv. Mater. by Cimrova V. (1996)
D. Steiger P. Smith Ch. Weder Makromol. Chem. Rapid Commun. 18 643 (1997). (10.1002/marc.1997.030180804)
Ch. Weder and
Wrighton M. S., Macromolecules 29, 5157 (1996); (10.1021/ma950902y) / Macromolecules by Wrighton M. S. (1996)
; A. Montali Ch. Weder P. Smith Proc. SPIE 3148 298 (1997). For a recent review on PPEs see also R. Giesa J. Macromol. Sci. Rev. Macromol. Chem. Phys. C36 631 (1996). (10.1117/12.279328)
Ch. Weder
Sarwa C., Bastiaansen C., Smith P., Polym. Prepr. Am. Chem. Soc. Div. Polym. Chem. 38, 404 (1997); / Polym. Prepr. Am. Chem. Soc. Div. Polym. Chem. by Sarwa C. (1997)
; Adv. Mater. 9 1035 (1997).
Blend films were prepared by casting a solution of the PPE (10 mg) and UHMW-PE (Hostalen Gur 412 Hoechst 0.5 g) in xylene (50 ml) (dissolution at 130°C after degassing the mixture in vacuum at 25°C for 15 min) into a petri dish 11 cm in diameter. The resulting gels were dried under ambient conditions for 24 hours to yield films of a homogeneous thickness of about 70 μm. These blend films were drawn at temperatures of 90° to 120°C to a draw ratio λ (final length/initial length) of about 80 to produce oriented PL layers of a thickness of about 2 μm. The PL layers were sandwiched between two glass or quartz slides; a thin layer of silicon oil fluid was applied to minimize light scattering at the film surfaces. Further details on the preparation of polarized PL layers are given in (12).
F. Wudl and G. Srdanov U.S. Patent 5 189 136 (1993).
Ch. Weder C. Bastiaansen C. Sarwa P. Smith European Patent Application No. 97111229.7.
We thank D. J. Broer for stimulating discussions and for providing LC cells.

Dates

Type	When
Created	23 years, 1 month ago (July 27, 2002, 5:42 a.m.)
Deposited	8 months, 3 weeks ago (Dec. 8, 2024, 1:18 p.m.)
Indexed	1 month, 3 weeks ago (July 9, 2025, 6:49 p.m.)
Issued	27 years, 6 months ago (Feb. 6, 1998)
Published	27 years, 6 months ago (Feb. 6, 1998)
Published Print	27 years, 6 months ago (Feb. 6, 1998)

Funders 0

None

BibTeX

@article{Weder_1998, title={Incorporation of Photoluminescent Polarizers into Liquid Crystal Displays}, volume={279}, ISSN={1095-9203}, url={http://dx.doi.org/10.1126/science.279.5352.835}, DOI={10.1126/science.279.5352.835}, number={5352}, journal={Science}, publisher={American Association for the Advancement of Science (AAAS)}, author={Weder, Christoph and Sarwa, Christian and Montali, Andrea and Bastiaansen, Cees and Smith, Paul}, year={1998}, month=feb, pages={835–837} }

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