A simple projected capacitive touch panel is developed. This touch panel is capable of detecting multi‐point touch events. The device consists of a single piece of patterned transparent ITO glass and a sensing circuit. The applied driving signal is projected onto the sensing node in the form of an electric field. A charge sensing circuit is used to monitor the mutual capacitance between the driving and sensing nodes. This approach provides a simple and low cost alternative to current capacitive multi‐touch panel design.

Abstract

A stereoscopic three-dimensional (3D) system using a polarization rotator is proposed. The polarization rotator converts the polarizations of different eyes' images in temporal multiplexing. A novel fast nematic liquid crystal mode is also proposed. The new liquid crystal mode has fast response time and high contrast; hence it is a good candidate for polarization rotator. The proposed 3D system utilizes only passive polarized glasses, which are more convenient, light weight and low cost. In addition, the polarization rotator can be applied to current 2D displays and become 3D capable display.