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We measured the reflectance and contrast of four kinds of reflective liquid crystal displays (LCDs) under various ambient illuminations in offices. The reflectance and contrast of the reflective LCDs were then measured in a dark room using several measurement methods. These measurements in a dark room were compared with the results of the measurements under various ambient illuminations. From these...
We investigate the symmetry of viewing characteristics of liquid crystal displays (LCDs) which employ either twisted nematic (TN) or super twisted nematic (STN) liquid crystals. By using the rotation symmetry of the display structures and the principle of reciprocity, we present a mathematical proof of the exact left-right viewing symmetry of normally white TN-LCDs and STN-LCDs as well as various...
This chapter describes the small displays of cell phones and the large screens of high definition digital televisions. The most difficult ergonomic design point of the cell phone is to pack the display and keyboard into the small volume. The design method described is one example of Japanese miniaturization technology. This chapter describes the metrics of cell phone display performance and then introduces...
It is important to remember that liquid crystal display (LCD) technology was common in business machines long before it was adopted by the cellular telephone industry.This chapter details the role of LCD technology in business machines, using the multi-function photo copier as an illustrative example. Additionally, the function sharing capability of hard keys in conjunction with LCD technology is...
We have utilized a transmission ratio (TR) between curtain-shaped (Curtain) Mura and non-Mura zones as a key parameter to characterize the optical appearance of Curtain Mura occurred on a 13.3-in TFT–TN panel (Mura sample) after bonding process to place silicon-based driver-IC chips on one of the panel substrates using anisotropic conductive film as a binder (COG ACF process). Our measured TRs of...
Cholesteric liquid crystals (Ch-LCs) have been extensively studied due to their unique self-organized helical molecular structures and selective Bragg reflection properties, which exhibit great potentials for color displays and other practical applications. When functional, nanoscale molecular switches are doped in liquid crystals (LCs), the phases of the LCs or the molecular structures of the Ch-LCs...
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