Multi-touch touch screen

When Apple demonstrated the iPhone mobile phone at the MacWorld show, which took place in San Francisco (USA) recently, the most 'shocking' feature was the touch interface that allowed users to touch multiple points on the screen at the same time image to perform various tasks.

This multi-point, multi-touch interface technology will help people work faster on a small screen, for example, they can easily zoom in, zoom out the image with two fingers.

However, according to expert Jeff Han, of the University of New York (USA), " iPhone device is too small for everyone to feel the magic of technology. It will be more wonderful if many people stand in front of one. big screen and coordinated use together . "

Two fingers perform two different operations.Photo: TechReview .

Han has successfully developed an interface that supports 10-20 fingers at a low cost. He has also founded Perceptive Pixel Company to commercialize the technology and will ship a screen as big as a wall this month for a US military unit.

Multi-touch technology has been mentioned since the 80s. Mitsubishi (USA) Laboratory has introduced DiamondTouch table, allowing a group of people to sit around and present the project. There are many ways to produce multitouch screens, for example measuring resistance or capacitance on surfaces when fingers are touched. But devices based on this method are often limited in resolution and require high costs. Apple did not disclose which technology it used for the iPhone.

With the touch key, users often don't feel as clear as when pressing a regular phone key. Some researchers are testing screens that are capable of prompting a report. When contact occurs, the screen vibrates depending on the pressure of the finger. Han believes that technology will be useful in the Apple iPhone touch keyboard.