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Sensors/MEMS??

Touchscreen controller promises accurate navigation

Posted: 15 Oct 2009 ?? ?Print Version ?Bookmark and Share

Keywords:touchscreen? interface? sensor? navigation?

Avago Technologies has unveiled a touchscreen interface that enhances operation and navigation. The technology is a mutual capacitance, multi-touch controller capable of tracking up to four simultaneous touch points. The controller avoids the typical problem of ghost points that are found in most capacitive sensing technologies. It is suited for smart phones, portable media players and other portable electronic communications devices.

A touchscreen system typically consists of an LCD or OLED display, a touch sensitive panel, a protective cover lens and a touchscreen controller. Avago's multi-touch, capacitive touchscreen controller has been designed to offer highly-accurate, responsive and fluid on-screen navigation to greatly enhance the end-user's experience. Other key features of Avago's touchscreen interface include 500dpi resolution for jitter free smooth tracking; hover rejection and palm detection to prevent false touch responses; good adjacent touch resolution for finer screen features and sensitivity; and 13-inch per second tracking speed to provide screen navigation that is fast, responsive and suitable for gaming applications.

Designed for ease of adoption and manufacturing, Avago's touchscreen interface does not require any touch sensitivity scaling, noise tuning or capacitive balancing. It also has a robust design that allows for flexible ASIC placement on flex or PCBs. To simplify the assembly process, this device has a patent pending, built-in self test for panel indium tin oxide \breakage 'open/shorts,' which means no application test fixture is required resulting in scalability and quick turnaround of sensor panel prototypes and efficient manufacturing. Panel integrity tests can also be run on devices in the field. Moreover, this touchscreen controller offers configurable registers for customization and debugging, and pairs with both glass and polyethylene terephthalate sensor panels. Also available is a complete development kit, which includes software and sensor panel design guides are provided to further ease the implementation of this capacitive touch panel into customer designs.

Avago's new capacitive touch panel controller is currently shipping to one of the world's leading portable media player manufacturers and receiving excellent industry reviews for its multi-touch performance.

Additionally, several key mobile handset manufacturers are currently sampling Avago's touchscreen controller for use in their next generation designs.





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