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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 18 — Sep. 9, 2013
  • pp: 21444–21455

A novel optical film to provide a highly collimated planar light source

Tun-Chien Teng and Jau-Chian Ke  »View Author Affiliations


Optics Express, Vol. 21, Issue 18, pp. 21444-21455 (2013)
http://dx.doi.org/10.1364/OE.21.021444


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Abstract

In this paper, we proposed a novel optical film ‘Collimation Film with Equivalent Focal Reflective Aperture’ (CFEFRA) that can collocate with the proper light guide plate (LGP) to provide a highly collimated planar light source (HCPLS) that not only has high intensity peak but also good uniformity. The CFEFRA has micro-cylindrical lenses and inverted-prism-like micro-teeth on its upper surface and lower surface, respectively. The lower micro-teeth that are aligned with the upper lenses can deflect the light emitting from the LGP at large declination into the normal, and then the deflected light with transverse fan-out is further converged by the upper lens to become the collimated light. The exact alignment between the upper and lower micro-structures is fulfilled by the method ‘auto-secure-alignment by focusing of a collimated exposure beam’. The vertical and horizontal full width at half maximum (FWHM) of angular intensity of the HCPLS for the optimal case are of 14 and 6 degrees, respectively. Moreover, it still has high optical efficiency with light output of over 90% despite the resultant emitting light is such collimated. Most importantly, CFEFRA just needs to collocate with a relatively low-cost and easily-manufactured LGP so the HCPLS adopting the CFEFRA can be extended for large-sized application. Both optical model and experimental samples are demonstrated in this paper, and the simulation results are consistent with the experimental results. The consistency proves our design concept and optical model are convincible and feasible.

© 2013 OSA

OCIS Codes
(220.4000) Optical design and fabrication : Microstructure fabrication
(230.3670) Optical devices : Light-emitting diodes
(220.2945) Optical design and fabrication : Illumination design
(080.4298) Geometric optics : Nonimaging optics

ToC Category:
Optical Design and Fabrication

History
Original Manuscript: June 4, 2013
Revised Manuscript: August 23, 2013
Manuscript Accepted: August 27, 2013
Published: September 5, 2013

Citation
Tun-Chien Teng and Jau-Chian Ke, "A novel optical film to provide a highly collimated planar light source," Opt. Express 21, 21444-21455 (2013)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-21-18-21444


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References

  1. C. H. Chen, P. C. Chen, and C. C. Chen, “High extinction ratio polarized light guide with layered cross stacking nanostructure,” Microelectron. Eng.86(4-6), 1107–1110 (2009). [CrossRef]
  2. P. C. Chen, H. H. Lin, C. H. Chen, C. H. Lee, and M. H. Lu, “Color separation system with angularly positioned light source module for pixelized backlighting,” Opt. Express18(2), 645–655 (2010). [CrossRef] [PubMed]
  3. M. Xu, H. P. Urbach, and D. K. G. de Boer, “Simulations of birefringent gratings as polarizing color separator in backlight for flat-panel displays,” Opt. Express15(9), 5789–5800 (2007). [CrossRef] [PubMed]
  4. Y. C. Kim, H. D. Im, M. G. Lee, and H. Y. Choi, ”Directivity Enhanced BLU for Edge-type Local Dimming,” SID Symposium Digest of Technical Papers42, 662–664 (2011). [CrossRef]
  5. K. Nakamura, T. Fuchida, K. Yamagata, A. Nishimura, T. Takita, and H. Takemoto, ”Optical design of front diffuser for collimated backlight and front diffusing system,” Proc. IDW11, 475–478 (2011).
  6. LGD, “Stereoscopic display device using electrically-driven liquid crystal lens,” US patent 7855756 (2010).
  7. C. Y. Chen, Q. L. Deng, and H. H. Lin, “Design of a symmetric blazed grating sheet embedded in an autostereoscopic display,” Opt. Lett.36(17), 3422–3424 (2011). [CrossRef] [PubMed]
  8. H. C. Cheng, J. Yan, T. Ishinabe, N. Sugiura, C. Y. Liu, T. H. Huang, C. Y. Tsai, C. H. Lin, and S. T. Wu, “Blue-Phase Liquid Crystal Displays With Vertical Field Switching,” J. Disp. Technol.8(2), 98–103 (2012). [CrossRef]
  9. http://solutions.3m.com/wps/portal/3M/en_US/NA_Optical/Systems/Technology/DisplayFilms/
  10. GE, ILLUMINATION SYSTEM FOR A DISPLAY DEVICE, ”US Patent 4924356 (1990).
  11. 3M,” MULTIFUNCTIONAL OPTICAL ASSEMBLY, ”US Patent 7218831 (2007).
  12. J. H. Lee, H. S. Lee, B. K. Lee, W. S. Choi, H. Y. Choi, and J. B. Yoon, “Simple liquid crystal display backlight unit comprising only a single-sheet micropatterned polydimethylsiloxane (PDMS) light-guide plate,” Opt. Lett.32(18), 2665–2667 (2007). [CrossRef] [PubMed]
  13. S. Aoyama, A. Funamoto, and K. Imanaka, “Hybrid normal-reverse prism coupler for light-emitting diode backlight systems,” Appl. Opt.45(28), 7273–7278 (2006). [CrossRef] [PubMed]
  14. S. R. Park, O. J. Kwon, D. Shin, S. H. Song, H. S. Lee, and H. Y. Choi, “Grating micro-dot patterned light guide plates for LED backlights,” Opt. Express15(6), 2888–2899 (2007). [CrossRef] [PubMed]
  15. Nanogate Advanced Materials, Illuminating device,”US patent 7682062 (2010).
  16. D. Grabovičkić, P. Benítez, J. C. Miñano, and J. Chaves, “LED backlight designs with the flow-line method,” Opt. Express20(S1), A62–A68 (2012). [CrossRef] [PubMed]
  17. IBM, LIGHT GUIDE APPARATUS, A BACKLIGHT APPARATUS AND A LIQUID CRYSTAL DISPLAY APPARATUS,” US patent 6667782Bl (2003).
  18. J. W. Pan and C. W. Fan, “High luminance hybrid light guide plate for backlight module application,” Opt. Express19(21), 20079–20087 (2011). [CrossRef] [PubMed]
  19. Mitsubishi rayon, Plane light source unit,” US Patent 5711589 (1998).
  20. K. Käläntär, “Modified functional light-guide plate for backlighting transmissive LCDs,” J. Soc. Inf. Disp.11(4), 641–645 (2003). [CrossRef]
  21. K. Käläntär, ”Functional Light-Guide Plate for Backlight Unit,” SID Symposium Digest of Technical Papers30, 764–767 (1999). [CrossRef]
  22. K. Käläntär, “Modulation of viewing angle on an LCD surface through backlight optics,” J. Soc. Inf. Disp.11(4), 647–652 (2003). [CrossRef]
  23. K. Käläntär, “A directional backlight with narrow angular luminance distribution for widening the viewing angle for an LCD with a front-surface light-scattering film,” J. Soc. Inf. Disp.20(3), 133–142 (2012). [CrossRef]
  24. T. C. Teng, “A Novel Feasible Digital Laser-Blastering to Fabricate a Light-Guide-Plate of High Luminance and Efficiency for TV Application,” J. Disp. Technol. (to be published) http://ieeexplore.ieee.org/xpl/login.jsp?tp=&arnumber=6515354&url=http%3A%2F%2Fieeexplore.ieee.org%2Fiel7%2F9425%2F4356458%2F06515354.pdf%3Farnumber%3D6515354

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