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13:48

iPhone Touchscreen Smarter than other Smartphones

Millimeters Matter: Small differences in touchscreen sensitivity actually reveal exponential difference in performance. Less sensitive touchscreen systems are infuriating to use for typing.

The clear winner was the iPhone’s touch sensor, which showed the most linear tracking with the least amount of stair-stepping. The Droid Eris and Nexus One tied for second with only faint wiggling but actually performed best at the edge of the screen. Last in the line-up was the Motorola Droid, which demonstrated significant wavy artifacts or “stair-stepping.”

To create a superior touchscreen experience, the key is to develop a touchscreen sensor that has the highest possible signal-to-noise ratio, or SNR. When a manufacturer gets it right, the device tracks touch inputs almost as if they were connected to physical objects in the real world. Key drivers of SNR include:

Conductive sensor material

Substrate material

Substrate thickness

Distance from display (the biggest noise source) Sensing waveform Sensor pattern Sensor pitch Analog sensing circuitry Sample rate

Touchscreens are a catalyst for innovation and a powerful way for device manufacturers to differentiate their products in an intensely competitive marketplace. But as MOTO’s demonstration shows, there’s a right way and a wrong way to deploy the technology. MOTO has worked with capacitive touch interfaces, and offered up these essential dos and don’ts for anyone entering the field:

* Don’t skimp on materials. With touchscreen hardware, manufacturers get what they pay for and consumers will notice the difference. * Allow ample time to develop your algorithms. Don’t treat touchscreen algorithms as an element of component sourcing; create a distinct touch development track in-house to make sure your products are both responsive and accurate. * Closely integrate touchscreen hardware, software, and user interaction development as early as possible in the product development process. Never treat them as separate tasks.

The success of the iPhone has triggered the adoption of touchscreen systems in a wide range of mobile devices, and a bevy of new gadgets equipped with capacitive sensing technology have now hit the market. MOTO’s conclusion sates that ‘All touchscreens are not created equal’ The video and photos of MOTO’s “DIY Smartphone Touchscreen Analysis” experience is available here.

Your browser may not support display of this image. The MOTO touchscreen tests

For the latest Samsung India check http://www.thinkdigit.com

John Wells is an expert in personal electronic gadgets including laptops, Samsung Corby, LCD Tvs and Fly Mobile, and many more.

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