Sharp Improves on the Touch Screen

If you thought the iPhone screen's two-finger touch was cool then you should see a prototype from Sharp Corp. on show at the Ceatec exhibition, which opened on Tuesday in Makuhari Messe.

The 3.5-inch screen integrates an optical scanner pixel alongside each LCD pixel. This means the screen can scan objects such as name cards placed on its surface and recognize fingers or other objects. Because it's determining the position of fingers from a scanner input and not a touch screen, it's possible to touch the screen in more than two places and have all fingers recognized.

Additionally the lack of a touch screen or other filters means the image from the screen remains clear and bright.

In a demonstration on the company's stand at Ceatec the display showed a simply musical keyboard. Different tones could be produced by pressing different combinations of notes.

Sharp also demonstrated the screen working as a name card scanner. It has a resolution of 320 pixels by 480 pixels and completed the scanning task in about 1 second.

The panel is still a prototype but commercialization is expected in the first half of next year. Samples are already in the hands of potential customers but Sharp wouldn't name those companies.

Potential applications are plenty. For example a future cell phone could use the screen and offer users both a touch-screen interface and scanner for name cards, barcodes or fingerprint recognition for security. Or it could find use in a computer gaming device where players have to use multiple fingers to repel opponents.

The screen on show isn't the first time a scanner has been integrated into an LCD panel. At the Electronic Display Expo in Tokyo in April 2003 Toshiba Matsushita Display Technology Co. Ltd. unveiled a prototype LCD with a scanner built between the screen's pixels but it never became a commercial product. It was also much slower than Sharp's panel taking about 7 seconds to scan a name card.