Two-domain twisted nematic and tilted homeotropic liquid crystal displays for active matrix applications

Abstract

To overcome the viewing-angle dependence of TN (twisted nematic) cells, the author has investigated two-domain TN (TDTN) and two-domain tilted homeotropic (TDTH) cells with optical compensation for active matrix applications. The simulated and experimental results for TDTN show a large viewing zone of +or-40 degrees in the vertical and +or-60 degrees in the horizontal directions with excellent grayscale fidelity. TDTN has been fabricated using multiple rubbings and one masking operation. Simulated results for compensated single-domain TH and TDTH are also reported. TDTH cells have been fabricated using a total of four oblique evaporations and one mask. The width of the disclination line between the two domains of TDTN or TDTH cells is discussed.<>