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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 15, Iss. 6 — Mar. 19, 2007
  • pp: 2888–2899

Grating micro-dot patterned light guide plates for LED backlights

Seung Ryong Park, Oh Jang Kwon, Dongho Shin, Seok-Ho Song, Hong-Seok Lee, and Hwan Young Choi  »View Author Affiliations


Optics Express, Vol. 15, Issue 6, pp. 2888-2899 (2007)
http://dx.doi.org/10.1364/OE.15.002888


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Abstract

A novel LED backlight unit implementing a light guide plate (LGP) with a two-dimensional array of grating micro-dots is proposed. By optimizing grating-vector orientations of local gratings and applying suitable grating-depth modulation in the array, taking into consideration of the radiation pattern of the LED source, uniform out-coupled light distribution within a narrow luminance angle was achieved without recognizable hot spots. Such a light guide plate was fabricated using a dot-matrix holographic interferometer setup and a UV embossing replication. Fabricated polycarbonate LGP showed ~62% intensity uniformity within ~8° and ~20° luminance angles in two main directions.

© 2007 Optical Society of America

OCIS Codes
(050.1970) Diffraction and gratings : Diffractive optics
(220.4000) Optical design and fabrication : Microstructure fabrication

ToC Category:
Diffraction and Gratings

History
Original Manuscript: January 2, 2007
Revised Manuscript: February 15, 2007
Manuscript Accepted: February 27, 2007
Published: March 19, 2007

Citation
Seung Ryong Park, Oh Jang Kwon, Dongho Shin, Seok-Ho Song, Hong-Seok Lee, and Hwan Young Choi, "Grating micro-dot patterned light guide plates for LED backlights," Opt. Express 15, 2888-2899 (2007)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-15-6-2888


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References

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