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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 43, Iss. 24 — Aug. 20, 2004
  • pp: 4672–4676

Polarized Backlight Based on Selective Total Internal Reflection at Microgrooves

Ko-Wei Chien, Han-Ping D. Shieh, and Hugo Cornelissen  »View Author Affiliations


Applied Optics, Vol. 43, Issue 24, pp. 4672-4676 (2004)
http://dx.doi.org/10.1364/AO.43.004672


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Abstract

A polarized backlight for LCD illumination is designed and fabricated in which s-polarized light is extracted owing to selective total internal reflection at microstructures in the anisotropic layer. From the measurement, the contrast ratio in normal viewing direction can be as high as 64. Luminous uniformity of higher than 80% is achieved for polarized backlights. Furthermore, 1.6 gain in efficiency is obtained aiming for high-efficiency LCD illumination.

© 2004 Optical Society of America

OCIS Codes
(150.2950) Machine vision : Illumination
(160.3710) Materials : Liquid crystals
(240.5420) Optics at surfaces : Polaritons
(260.1440) Physical optics : Birefringence

Citation
Ko-Wei Chien, Han-Ping D. Shieh, and Hugo Cornelissen, "Polarized Backlight Based on Selective Total Internal Reflection at Microgrooves," Appl. Opt. 43, 4672-4676 (2004)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-43-24-4672


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References

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  2. Z. Pang and L. Li, “Novel high efficiency polarizing backlighting system with a polarizing beam splitter,” in Society for Information Display International Symposium Digest, J. Morreale, ed. (Society for Information Display, San Jose, Calif., 1999), pp. 916–919.
  3. H. Jagt, H. Cornelissen, D. Broer, and C. Bastiaansen, “Micro-structured polymeric linearly polarized light-emitting lightguide for LCD illumination,” in Society for Information Display International Symposium Digest, J. Morreale, ed. (Society for Information Display, San Jose, Calif., 2002), pp. 1236–1239.
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  6. H. Jagt, Polymeric Polarisation Optics for Energy Efficient Liquid Crystal Display Illumination (University Press Facilities, Eindhoven, The Netherlands, 2001), p. 114.
  7. G. R. Fowles, Introduction to Modern Optics, 2nd ed.(Holt, Rineheart & Winston, New York, 1975), p. 168.

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