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Applied Optics

Applied Optics


  • Editor: James C. Wyant
  • Vol. 45, Iss. 28 — Oct. 1, 2006
  • pp: 7273–7278

Hybrid normal-reverse prism coupler for light-emitting diode backlight systems

Shigeru Aoyama, Akihiro Funamoto, and Koichi Imanaka  »View Author Affiliations

Applied Optics, Vol. 45, Issue 28, pp. 7273-7278 (2006)

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For the first time to our knowledge, a hybrid normal-reverse prism coupler was formed on the bottom surface of a light guide in a LED backlight system to achieve a thin, lightweight, LED backlight system. The hybrid prism coupler (HPC) simultaneously exhibits two functions: extraction of guided light from the light guide and focusing the radiated light from the light guide, corresponding to the optical functions of the prism and diffusive sheets used in conventional LED backlight systems. Therefore, using a HPC eliminates the prism and diffusive sheets that have been indispensable optical elements in conventional LED backlight systems, which consequently reduces the thickness of the LED backlight system by 40 % compared with conventional systems.

© 2006 Optical Society of America

OCIS Codes
(130.3120) Integrated optics : Integrated optics devices
(230.0230) Optical devices : Optical devices
(230.5480) Optical devices : Prisms

ToC Category:
Optical Devices

Original Manuscript: November 9, 2005
Revised Manuscript: March 23, 2006
Manuscript Accepted: March 23, 2006

Shigeru Aoyama, Akihiro Funamoto, and Koichi Imanaka, "Hybrid normal-reverse prism coupler for light-emitting diode backlight systems," Appl. Opt. 45, 7273-7278 (2006)

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