ViewSonic plans to announce on Tuesday the details of some of its first portable displays that will use Microsoft software to expand how PCs are used in the home.

The Walnut, Calif.-based monitor maker's new devices will use Microsoft's Windows CE for Smart Displays software, technology previously code-named Mira. So-called smart displays are portable monitors that can communicate wirelessly with a PC. With a stylus, a person can surf the Web or respond to e-mail using the monitor's touch screen.

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