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LCD and DLP: Differences and Importance

By Andy Grant

Republish: EasyPublish™ Published: 25Dec2011 Word count: 419 Viewed: 140 time(s) Get Free Content For Your Site

Are you confused about the differences between DLP and LCD rental projectors? In our ongoing series on technical questions and answers about projectors, we tackle this common query.

LCD
LCD is a commonly used term, though few people can easily recall what the acronym represents. LCD stands for "liquid crystal display," a term used to indicate that the unit contains two transparent polarized panels, with a liquid solution between them. Light shines through the panels from behind, causing an image to appear. Polarized panels will only pass light waves in one plane, and the panels are positioned at a 90 degree angle to each other, which means light from one plane cannot pass through the other panel. But when electricity passes through the liquid crystals, individual pixels are switched on or off, to produce a specific image.

With regards to projectors, LCD projectors typically send light through a prism from a metal halide lamp that separates the light into colors (green, red and blue). The video signal is essentially split by color, and the prism sorts the colors and projects the specified image.

LCD projectors are the most popular because they are lightweight and extremely portable. Typically, metal lamps are used for their ideal color temperature and ability to display a large amount of colors. Additionally, metal lamps can produce a vast amount of light in a small area, making them ideal for high-lumen outputs.

DLP
DLP projectors generally feature brighter, more defined display outputs than LCD, but are certainly more costly. Many businesses and educational companies prefer DLP over LCD. With a DLP projector, white light is projected through an array of movable mirrors that control the intensity of each pixel of light as well as the color.

Although DLP projectors are more expensive, they hold a distinct advantage over LCD projectors with regards to maintenance. Projector maintenance and cleaning are required to keep each unit in good functioning order. Every interaction with a projector ultimately costs time and money; therefore, it is important to understand how often you will need to maintain your projector throughout its lifetime. DLP projectors can save a bundle on time and money since no filter is required, and DLP projectors features a lamp free design.

Of course, if you plan to avoid maintenance altogether, it makes sense to rent a projector instead of purchasing one. Be sure to ask questions before you rent, so you're clear on what kind of projector you'll be receiving.

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