Pros and Cons

Photo courtesy HowStuffWorks Shopper JVC Multimedia projector

The physical properties of the LCoS microdevice, like the absence of a color wheel and the high fill factor, generally provide a high-quality picture with a minimum of artifacts. LCoS pixels are also smoother than the pixels of other systems, which some people say creates more natural pictures. The rainbow and screen door effects common to DLP televisions don't exist for LCoS. Unlike LCD systems, they're not prone to screen burn-in.

However, most LCoS systems don't have a very good black level, or ability to produce the color black. Televisions with poor black level generally can't produce as much contrast or detail as those with good black level. Since LCoS televisions and projectors use three microdevices instead of one, they also tend to be heavy and bulky. Most require periodic lamp replacement, which can cost several hundred dollars.

In addition, LCoS systems aren't as common as other display types. The reason for this is that LCoS microdevices are difficult to manufacture, and each set needs three of them. Several companies, including Intel, have tried to produce LCoS systems and have abandoned their efforts after consistently low yields in manufacturing.

Photo courtesy HowStuffWorks Shopper Sony SXRD TV

Check out the links on the next page for lots more information on liquid crystals, televisions and related topics.

Other Uses of LCoS LCoS has other uses besides televisions and projectors. For example, some digital camera viewfinders use LCoS displays. Future applications for the technology include: Near-to-eye viewing systems, including head-mounted displays Optical beam steering Micro-projectors Holographic projection and storage