As demand for touch-screen displays grows thanks to hot-selling gadgets like Apple Inc.'s iPhone and Nintendo Co.'s DS game consoles, the technologies for them are advancing to the point that just clicking and opening files will soon be mundane.

The latest trends and technologies driving touch-panel displays are being showcased at the First International Touch Panel Expo, the Fifth International FPD Expo, and two other conventions that kicked off Wednesday at Tokyo Big Sight in Koto Ward.

The four exhibitions, which run until Friday, are expected to draw 60,000 visitors, according to organizer Reed Exhibitions Japan.