Video Hardware - Upgrading and Repairing PCs - page 827

The earliest DLP projectors used a simple three-color (RGB) wheel, as shown in Figure
12.25 . However, more recent models have used a four-segment (RGB and clear) or a six-
segment (RGBRGB) wheel to improve picture quality.
Note
For more information about digital light processing, see the official Texas Instruments web-
site about DLP technology at www.dlp.com .
Using Multiple Monitors
One of the most useful things you can do for increasing the usability and productivity of
a PC is to attach multiple monitors. Adding additional monitors gives you more screen
real estate to use for running multiple applications simultaneously. When you configure a
system to use multiple monitors, the OS creates a virtual desktop—that is, a display that
exists in video memory that combines the total screen real-estate of all of the attached
displays. You use the multiple monitors to display various portions of the virtual desktop,
enabling you to place the open windows for different applications on separate monitors
and move them around at will.
Although having three or more displays is entirely possible, just adding a second monitor
can be a boon to computing productivity. For example, you can leave an email client or
word processor maximized on one monitor and use the other monitor for web browsing,
research documents, and more.