Color-accurate interactive liquid crystal display

Abstract

Viewing angle-dependent color shift is one of the major drawbacks of liquid crystal displays (LCD). As the viewing angle increases, not only the luminance but also the color saturation decreases so that the image quality is compromised. In this paper, we characterize the viewing angle-dependent color shift of an LCD and propose a compensation method of adjusting the backlights and panel transmittance simultaneously. By increasing the panel transmittance, the color shift and luminance attenuation can be minimized. By increasing or decreasing the backlight intensity, the original luminance can be preserved or the power consumption can be reduced. The proposed method uses a video camera to capture the user's location for calculating the viewing angle. We have also implemented an emulator for reproducing the viewing angle-dependent visual effects.