Nanowire grid polarizer for energy efficient and wide-view liquid crystal displays

We report a liquid crystal display (LCD) using a nanowire grid polarizer (NWGP) to replace the bottom sheet linear polarizer (LP). The top LP and bottom NWGP configurations enable backlight recycling for enhancing optical efficiency while keeping a high contrast ratio and wide viewing angle. The electro-optic performance of this device configuration is studied based on the effective-medium theory and 4×4 matrix method. Results show that this configuration exhibits a 100:1 contrast ratio over 75° viewing cone in a film-compensated multidomain vertical alignment LCD and 10:1 over 65° viewing cone in a fringe-field switching LCD without any compensation film.

[1]  George R. Bird,et al.  The Wire Grid as a Near-Infrared Polarizer , 1960 .

[2]  D. W. Berreman,et al.  Optics in Stratified and Anisotropic Media: 4×4-Matrix Formulation , 1972 .

[3]  Pochi Yeh,et al.  A new optical model for wire grid polarizers , 1978 .

[4]  E. Palik.  Handbook of Optical Constants of Solids , 1997 .

[5]  Takahiro Sasaki,et al.  41.1: A Super‐High Image Quality Multi‐Domain Vertical Alignment LCD by New Rubbing‐Less Technology , 1998 .

[6]  Sunyoup Lee,et al.  Electro-optic characteristics and switching principle of a nematic liquid crystal cell controlled by fringe-field switching , 1998 .

[7]  C. A. Stover,et al.  Giant birefringent optics in multilayer polymer mirrors , 2000, Science.

[8]  H. Kwok,et al.  Optical wire-grid polarizers at oblique angles of incidence , 2003 .

[9]  Jun Li,et al.  Refractive indices of liquid crystals for display applications , 2005, Journal of Display Technology.

[10]  Shin-Tson Wu,et al.  Extraordinarily high-contrast and wide-view liquid-crystal displays , 2005 .

[11]  Shin-Tson Wu,et al.  Reflective liquid-crystal displays with asymmetric incident and exit angles. , 2005 .

[12]  Yingbai Yan,et al.  Polarized light-guide plate for liquid crystal display. , 2005, Optics express.

[13]  Feng Liu,et al.  30-nm-wide aluminum nanowire grid for ultrahigh contrast and transmittance polarizers made by UV-nanoimprint lithography , 2006 .

[14]  Shin-Tson Wu,et al.  Comprehensive Three-dimensional Dynamic Modeling of Liquid Crystal Devices using Finite Element Method , 2005, 2006 IEEE Antennas and Propagation Society International Symposium.

[15]  S.-T. Wu,et al.  Analytical solutions for uniaxial-film-compensated wide-view liquid crystal displays , 2006, Journal of Display Technology.

[16]  S. H. Kim,et al.  Fabrication of a nano-wire grid polarizer for brightness enhancement in liquid crystal display , 2006 .

[17]  P. Sciortino,et al.  High-performance, large area, deep ultraviolet to infrared polarizers based on 40 nm line/78 nm space nanowire grids , 2007 .

[18]  Shin-Tson Wu,et al.  Thin cell fringe-field-switching liquid crystal display with a chiral dopant , 2008 .