The first XGA AMLCD (14.1″) incorporating integrated high‐resolution touch capability by optical means is demonstrated. The optical a‐Si sensor array (256×192) embedded in the TFT backplane operates with either shadow of touch from the ambient light, or with external light sources. The integration of the complete system with algorithms, optical means, its unique properties and potential applications will be discussed.

A 2.4 in. by 2.4 in. TFT LCD is presented with an embedded 60×60 array of a‐Si photo sensors, for use as a high performance touch‐enabled LCD with low cost. In the shadow mode the optical touch screen operates with finger or stylus input under ambient lighting conditions from 50 lux to 50 klux.

Abstract— A 0.7‐inch‐diagonal full‐color VGA active‐matrix EL display using a liquid‐crystal color shutter to provide field‐sequential filtering of the broadband EL emission is reported. The shutter's color‐filter design improves the color gamut of AMEL displays using the SrS: Ce/ZnS: Mn EL phosphor. A digital gray‐scale addressing scheme achieves 256 colors using temporal binary shading combined with error diffusion.

An active matrix EL VGA display is reported with full grayscale using temporal voltage modulation of the phosphor. The exceptional brightness and dynamic range of the ZnS:Mn EL phosphor permits a new gray scale scheme. Digital gamma correction and an extended range of levels achieve 128 to 256 monotonic shades.

Color active matrix electroluminescent (AMEL) microdisplays with analog pixel design have demonstrated high brightness, low power consumption and over 256 gray levels per primary color. A new driving scheme for the analog pixel has been developed which eliminates luminance intensity variations and noise due to electronic coupling on the display. A new color pixel design has been implemented which produces a more saturated blue color and a higher white color temperature.