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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 53, Iss. 8 — Mar. 10, 2014
  • pp: 1503–1511

High-efficiency backlight module with two guiding modes

Chang-Yi Li and Jui-Wen Pan  »View Author Affiliations


Applied Optics, Vol. 53, Issue 8, pp. 1503-1511 (2014)
http://dx.doi.org/10.1364/AO.53.001503


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Abstract

We propose a design for a high-efficiency backlight module that does not require a brightness enhancement film (BEF). With the high-efficiency backlight module it is possible to achieve almost the same half-luminance angle as a conventional edge-lit backlight module can achieve. The backlight system is comprised of a crisscross light guide plate (LGP) and one diffuser sheet. The crisscross LGP is composed of a LGP and optically patterned film (OPF). The backlight module allows light to be extracted through the direct guiding mode and top guiding mode, respectively. We controlled arrangement of the microstructures to increase the optical efficiency and the uniformity by two modes. Compared to the conventional edge-lit backlight module, there is a two-fold improvement in both the total optical efficiency and on-axis luminance with the high-efficiency backlight module.

© 2014 Optical Society of America

OCIS Codes
(220.4830) Optical design and fabrication : Systems design
(230.3670) Optical devices : Light-emitting diodes
(230.4000) Optical devices : Microstructure fabrication
(350.3950) Other areas of optics : Micro-optics
(150.2945) Machine vision : Illumination design

ToC Category:
Optical Design and Fabrication

History
Original Manuscript: November 12, 2013
Revised Manuscript: January 23, 2014
Manuscript Accepted: January 28, 2014
Published: March 4, 2014

Citation
Chang-Yi Li and Jui-Wen Pan, "High-efficiency backlight module with two guiding modes," Appl. Opt. 53, 1503-1511 (2014)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-53-8-1503

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