28.4: High‐Resolution Stereoscopic TFT‐LCD with Wire Grid Polarizer

Abstract

We developed a 5.5 inch, VGA (640×480×RGB), stereoscopic 3D display using a precisely patterned wire grid polarizer (WGP) with rows of alternating polarization angle. Such a wire grid polarizer is invisible without the polarizer and thus a 2D/3D convertible display can be formed. The proposed structure is free of any limitations on both viewing angle and viewing distance inherent in the conventional stereoscopic displays, whereby enabling several persons to view stereoscopic image simultaneously. Because the proposed structure does not use conventional polarization film of TFT-LCD panel, it can be manufactured with low-cost.

Impact of the slit geometry on the performance of wire-grid polarisers

“…Here we show that geometrical deviations of the manufactured structure with respect to those used in the simulations are the reason for this discrepancy [12]. In particular our gold gratings exhibit trapezoidal stripes instead of rectangular ones, a common problem, with only a few exceptions [13,14], to all fabrication techniques such as anisotropic etching, Focused Ion Beam (FIB) milling and nanoimprint. We observe an approximately exponential decrease of the extinction ratio with the tilting angle of the slits.…”