Wideband and wide-view circular polarizer for a transflective vertical alignment liquid crystal display

Je-Wook Moon; Wan-Seok Kang; Hag yong Han; Sung Min Kim; Seung Hee Lee; Yong gyu Jang; Chul Heon Lee; Gi-Dong Lee

doi:10.1364/AO.49.003875

Applied Optics
Vol. 49,
Issue 20,
pp. 3875-3882
(2010)
•https://doi.org/10.1364/AO.49.003875

Wideband and wide-view circular polarizer for a transflective vertical alignment liquid crystal display

Je-Wook Moon, Wan-Seok Kang, Hag yong Han, Sung Min Kim, Seung Hee Lee, Yong gyu Jang, Chul Heon Lee, and Gi-Dong Lee

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Je-Wook Moon, Wan-Seok Kang, Hag yong Han, Sung Min Kim, Seung Hee Lee, Yong gyu Jang, Chul Heon Lee, and Gi-Dong Lee, "Wideband and wide-view circular polarizer for a transflective vertical alignment liquid crystal display," Appl. Opt. 49, 3875-3882 (2010)

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Abstract

We propose an optical configuration for a transflective mode with a circular polarizer for the vertical alignment liquid crystal cell, which can show the wideband property of high contrast in oblique incidence. The proposed configuration consists of a biaxial film and two uniaxial films for satisfying both the transmissive and the reflective modes. Optimization of the optical configuration of the circular polarizer has been performed on the Poincaré sphere in the entire visible wavelength range using the Stokes vector and the Mueller matrix method. We also verify the excellent optical characteristics of the proposed configuration by comparing the viewing angle and contrast ratio in the oblique direction with a conventional optical configuration in calculation.

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	$Δ n / Δ n$ $(550 nm)$		$Δ n d$ (nm)
	$450 nm$	$630 nm$	$550 nm$
Upper positive A-plate	1.016	0.978	128
Upper negative C-plate	1.132	0.992	$- 231$
Lower positive A-plate	1.005	0.978	128
Lower negative C-plate	1.021	0.948	$- 295$

	$Δ n / Δ n$ $(550 nm)$ $(Δ n = n_{x} - n_{y} - n_{z} - n_{y})$		$Δ n d$ (nm) $Δ n = n_{x} - n_{y})$
	$450 nm$	$630 nm$	$550 nm$
Two biaxial films	1.004	0.996	256

	$Δ n / Δ n$ $(550 nm)$		$Δ n d$ (nm)
	$450 nm$	$630 nm$	$550 nm$
Upper positive A-plate	1.016	0.978	128
Upper negative C-plate	1.132	0.992	$- 231$
Lower positive A-plate	1.005	0.978	128
Lower negative C-plate	1.021	0.948	$- 295$

	$Δ n / Δ n$ $(550 nm)$ $(Δ n = n_{x} - n_{y} - n_{z} - n_{y})$		$Δ n d$ (nm) $Δ n = n_{x} - n_{y})$
	$450 nm$	$630 nm$	$550 nm$
Two biaxial films	1.004	0.996	256

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Equations (2)

Applied Optics