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Journal of the Optical Society of Korea

Journal of the Optical Society of Korea

| PUBLISHED BY THE OPTICAL SOCIETY OF KOREA

  • Vol. 13, Iss. 2 — Jun. 25, 2009
  • pp: 256–260

Correlation Between the Optical Performance of the Reflective Polarizer and the Structure of LCD Backlight

Mi-Yeon Yu, Byung-Woo Lee, Jeong-Ho Lee, and Jae-Hyeon Ko  »View Author Affiliations


Journal of the Optical Society of Korea, Vol. 13, Issue 2, pp. 256-260 (2009)


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Abstract

The optical performance of the reflective polarizer was investigated over three kinds of direct-lit backlights and/or different configurations of the optical sheets. The optical gain factor achieved by using the reflective polarizer increased as the diffuse nature of the optical sheet was enhanced, because of the more efficient polarization conversion. In addition, the gain factor decreased substantially in flat-lamp backlights compared to tubular-lamp backlights, which was ascribed to the high loss factor during the polarization recycling process due to the complex structure and large area of flat lamps. All these results suggested that reducing the loss factor of the backlight is very important for efficient polarization conversion and thus high optical gain of the reflective polarizer.

© 2009 Optical Society of Korea

OCIS Codes
(120.2040) Instrumentation, measurement, and metrology : Displays
(150.2950) Machine vision : Illumination
(230.3720) Optical devices : Liquid-crystal devices

History
Original Manuscript: February 17, 2009
Manuscript Accepted: March 16, 2009
Published: June 25, 2009

Citation
Mi-Yeon Yu, Byung-Woo Lee, Jeong-Ho Lee, and Jae-Hyeon Ko, "Correlation Between the Optical Performance of the Reflective Polarizer and the Structure of LCD Backlight," J. Opt. Soc. Korea 13, 256-260 (2009)
http://www.opticsinfobase.org/josk/abstract.cfm?URI=josk-13-2-256


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References

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