LCD projection technology

Ronald Ohlhaber

doi:10.1117/12.216837

18 August 1995 LCD projection technology

Ronald Ohlhaber

Proceedings Volume 2622, Optical Engineering Midwest '95; (1995) https://doi.org/10.1117/12.216837
Event: Optical Engineering Midwest '95, 1995, Chicago, IL, United States

Abstract

The availability of LCD panels such as found in laptop computers has permitted the establishment of new devices that permit display of computer monitor and video images. These LCDs were initially employed in panels that were placed on the stage of overhead projectors. They have now been integrated into complete projection products and are beginning to replace the 3-CRT projectors. The current technology of the LCD components will be discussed along with their unique properties when incorporated into a projection device. LCD technology has been evolving at a phenomenal rate. A full color LCD of the type used for a computer display became available only four years ago. Today, LCDs of exceptional quality and resolution exist. Still there are special operational properties, such as display control, transmission, contrast, color level, and response time, which must be addressed. Furthermore, there are both single large LCDs and the three monochrome color elements which when combined with dichroic optics yields a full color projector. Incorporating such LCDs with high output lamps results in reasonably bright images. These projection devices are replacing the film based presentation technology and providing the tools for computer generated, electronic multimedia presentations.

Citation Download Citation

Ronald Ohlhaber "LCD projection technology", Proc. SPIE 2622, Optical Engineering Midwest '95, (18 August 1995); https://doi.org/10.1117/12.216837

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KEYWORDS

LCDs

Projection systems

Computing systems

Video

Lamps

Video processing

Analog electronics

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