Like HowStuffWorks on Facebook!

How LCoS Works


A LCoS microdevice reflects light using liquid crystals.
Photo courtesy JVC

Most people grew up watching a cathode ray tube (CRT) television. These televisions, while bulky and heavy, had a great picture as long as they got a clear signal. CRT sets are still what a lot of people think of when they think of TVs.

But if you've shopped around for a TV recently, you've seen that now there are a lot more options. CRT still works well for screen sizes up to 40 inches. But if you want a larger screen, a flat panel TV, widescreen model or HDTV compatibility, you'll have to choose from several types of sets, including liquid crystal display (LCD), digital light processing (DLP) and liquid crystal over silicon (LCoS).

LCoS isn't particularly new technology, but it wasn't readily available until recently. In this article, we'll look at the technology behind LCoS, how it provides a clear picture and how manufacturers have addressed issues with black levels and contrast.