Abstract

We proposed a novel backlight system, which consisted of a hybrid light guide plate (LGP) and one diffuser sheet. The hybrid LGP contains a flat plate without any microstructures and one layer of optically patterned film (OPF). Comparing with the conventional edge-lit backlight system, the on-axis luminance could be improved to 6.1$\times$ by using the novel backlight system and the half-luminance angle decreased from 21 deg to 10 deg in vertical direction, and decreased from 21 deg to 6 deg in horizontal direction. At the same time, this design also achieved a uniformity of illumination of 89%. The design can predigest the fabrication and reduce the number of components. Moreover, since the microstructures arrangement was periodical, user could use light-emitting diodes (LEDs) on the both sides. When user turned on both side LEDs, the on-axis luminance were improved 1.7$\times$ comparing with turning on single side LEDs.

© 2013 IEEE

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References

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2011 (2)

J. W. Pan, C. W. Fan, "High luminance hybrid light guide plate for backlight system application," Opt. Express 19, 20079-20087 (2011).

K. Käläntär, S. Cho, H. O. Shi, "A directional backlight with narrow angular luminance distribution for widening viewing angle of a LCD with a front-surface-light-scattering film," J. Soc. Inf. Display 20, 133-142 (2011).

2010 (1)

J. C. Yu, P. K. Hsu, "Integration of stamper fabrication and design optimization of LCD light guides using silicon-based microfeatures," Microsyst. Technol. DOI 16, 1193-1200 (2010).

2008 (2)

A. Agasawa, T. Eguchi, Y. Sanai, K. Fujisaw, "Ultra slim and bendable system with a unified component for liquid crystal applications," Opt. Rev. 15, 38-43 (2008).

C. H. Chen, Y. C. Yeh, H. P. D. Shieh, "3-D mobile display based on Moiré-free dual directional backlight and driving scheme for image crosstalk reduction," J. Display Technol. 4, 92-96 (2008).

2007 (1)

2006 (1)

C. H. Chien, Z. P. Chen, "Fabrication of a novel integrated light guiding plate by microelectromechanical systems technique for backlight system," J. Microlith., Microfab., Microsyst. 5, 0430111-0430116 (2006).

2005 (1)

D. Fen, Y. Yan, X. Yang, G. Jin, S. Fan, "Novel integrated light-guide plates for liquid crystal display backlight," J. Opt. A: Pure Appl. Opt. 7, 111-117 (2005).

J. Display Technol. (1)

J. Microlith., Microfab., Microsyst. (1)

C. H. Chien, Z. P. Chen, "Fabrication of a novel integrated light guiding plate by microelectromechanical systems technique for backlight system," J. Microlith., Microfab., Microsyst. 5, 0430111-0430116 (2006).

J. Opt. A: Pure Appl. Opt. (1)

D. Fen, Y. Yan, X. Yang, G. Jin, S. Fan, "Novel integrated light-guide plates for liquid crystal display backlight," J. Opt. A: Pure Appl. Opt. 7, 111-117 (2005).

J. Soc. Inf. Display (1)

K. Käläntär, S. Cho, H. O. Shi, "A directional backlight with narrow angular luminance distribution for widening viewing angle of a LCD with a front-surface-light-scattering film," J. Soc. Inf. Display 20, 133-142 (2011).

Microsyst. Technol. DOI (1)

J. C. Yu, P. K. Hsu, "Integration of stamper fabrication and design optimization of LCD light guides using silicon-based microfeatures," Microsyst. Technol. DOI 16, 1193-1200 (2010).

Opt. Express (1)

Opt. Lett. (1)

Opt. Rev. (1)

A. Agasawa, T. Eguchi, Y. Sanai, K. Fujisaw, "Ultra slim and bendable system with a unified component for liquid crystal applications," Opt. Rev. 15, 38-43 (2008).

Other (7)

Modern Optical Engineering (McGraw Hill, 2008).

Nichia NESW155T Website http://www.nichia.co.jp/specification/en/product/led_library/NESW155T-E.pdf.

S. Kobayashi, S. Mikoshiba, S. Lim, LCD Backlights (2009).

R. Winston, J. C. Minano, P. Benitez, Nonimaging Optics (Academic, 2004).

J. H. Lee, J. B. Yoon, "A novel LCD backlight unit using a light-guide plate with high fill-factor microlens array and a conical microlens array sheet," Soc. Inf. Display Symp. Dig. Tech. Papers. (2007) pp. 465-468.

“3M display solution in tablet and notebook,” http://solutions. 3m.com/wps/portal/3M/en_US/NA_Optical/Systems/Technology/DisplayFilms/.

Data Projection Equipment and Large Screen Data Displays - Test Methods and Performance Characteristics ANSI IT7.215-1992American National Standards Institute (ANSI) (1992) http://www.ansi.org.

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