We investigate aspects of the design of a large area display based on seamless tiling of Photoluminescent LCD (PL-LCD) panels. This paper discusses and illustrates the design methodology involved in optically tiling PL-LCD panels to make arbitrarily large displays. Suitable magnification, image quality and throw were achieved through optimization of the front-face optical system. In addition, active and passive-matrix drive schemes were investigated with regard to the throughput, contrast-ratio and video-rate performance.
In portable communication devices there is a strong incentive to extend battery life through reduced power consumption of all system elements. This paper proposes a novel integration of image decompression and passive-matrix liquid crystal display driving through the application of DWT methods to the field of Multiple Line Addressing (MLA). This eliminates for the first time the need for data conversion between the decoded image and a format suitable for input to the display drivers. This is achieved by exploiting an inherent property of the liquid crystal to perform a 1-D inverse wavelet transform on the compressed incoming data. The paper presents a comparison of system performance for different wavelets, taking into account image compression rates, display performance and circuit complexity. It also presents a detailed system architecture and a discussion of the benefits and possible applications for such a scheme.