Transmissive Liquid Crystal Displays

Similarly, the reflective LCDs can be subdivided into direct-view and projection displays. In principle, a direct-view reflective LCD does not require a backlight so that it is light in weight and its power consumption is low. A major drawback is poor readability under weak ambient light. Thus, a reflective LCD is more suitable for projection TVs employing liquid-crystal-on-silicon (LCoS) microdisplay panels. In an LCoS, the reflector employed is an aluminum metallic mirror. The viewing angle is less critical in projection displays than in direct-view displays. 

For outdoor applications, the displayed images of a transmissive LCD could be washed out by sunlight A reflective LCD would be a better choice. However, such a reflective display is unreadable in dark ambient conditions. Transflective LCDs integrate the features 

Fundamentals of Liquid Crystal Devices, Second Edition. Deng-Ke Yang and Shin-Tson Wu. 2015 John Wiley Sons, Ltd. Published 2015 by John Wiley Sons, Ud. 

---

For example, active-matrix backplanes for reflective displays using electrophoretic media is a potential application for large-area electronics. Electrophoretic media are usually charged colored particles suspended in an insulating fluid [35-37]. When the fluid is held in an electric field between two conductive plates, the particles will move between the plates creating a dark or a reflective state. Because the contrast in an electrophoretic display is because of reflection, no backlight is required and the display has relatively low-power consumption compared with a transmissive liquid-crystal display. 

A transmissive liquid crystal display (LCD) that is sometimes referred to as an LCD light valve... 

The study reported here considers only the effects in the principal viewing plane of a transmissive liquid crystal display and neglects the effects of temperature. In this case, the multiplexing level N is determined by the merit figure... 

S. T. Wu and C. S. Wu, Mixed-mode twisted-nematic cell for transmissive liquid crystal display. Displays 20, 231 (1999). 

D. P. Hansen, J. E. Gunther, Dual mode reflecrive/transmissive liquid crystal display apparatus, US Patent... 

---