Touchscreen uses dispersive signal technology


Methuen, MA —A new 40-in. TFT touchscreen monitor from Richardson Electronics’ Pixelink Div. makes use of 3M Touch Systems Inc. new dispersive signal technology (DST).

3M’s MicroTouch DST touchscreen and controller (left) have been incorporated into the NEC MultiSyncLCD 4010 from Richardson Electronics’ Pixelink Div.

The integrated NEC MultiSyncLCD 4010 incorporates 3M’s MicroTouch DST touchscreen and controller and is the first in a planned product range of large format (more than 30 in.) touchscreens for varied indoor venues. Dispersive signal technology represents a fundamentally different approach to touch. Instead of recognizing touch by interruption of electrical fields, acoustic waves, optical fields, or infrared light, DST interprets bending waves created in the overlay substrate through the impact of a touch. This approach helps eliminate performance issues associated with on-screen contaminants and surface scratches while offering enhanced palm rejection.

According to market projections from iSuppli , a source of display market data, the total non-consumer, large-screen LCD and plasma display market is expected to grow to $4.79 billion by 2009.

Click here to read a previous article on DSP from Control Engineering.

—Control Engineering Daily News Desk
Jeanine Katzel, senior editor,

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