Tests show iPhone 5S, 5C touch screen accuracy to be pretty loose


We don’t ask very much from the systems controlling touch input on our smartphones. They need to be low-latency and accurate – beyond that, it’s up to the processor to make sense of those inputs, and the GPU to display any appropriate output on-screen. But so long as touch controllers hit those two notes, we’re good to go. Unfortunately, it looks like the latest iPhones may not be quite as accurate with recording touches as they could be, at least according to the research done by OptoFidelity.

The company used an automated system to test touchscreen accuracy, employing a computer-controlled robot to tap points all over the display’s surface, and software on the phone reporting back just where the touches were registered.

See that chart up top? Each of those circles represents a test point. Green means that the input was registered within one millimeter in any direction of where it should be; red indicates larger errors. As you can see, both the iPhone 5S and 5C only demonstrate high accuracy touch input on certain central regions of the screen. To help convince us both that this testing system isn’t inherently flawed, and that other smartphones are capable of much more precise touch input sensing, the Galaxy S III on the right shows near edge-to-edge accuracy.

Of course, maybe you can’t even notice inaccuracies on the scale we’re talking about. What’s a millimeter or two between friends? Have any of you new iPhone owners experienced any problems along this line, or do you think this whole test is making a stink about a non-issue?

Source: OptoFidelity
Via: iClarified

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About The Author
Stephen Schenck
Stephen has been writing about electronics since 2008, which only serves to frustrate him that he waited so long to combine his love of gadgets and his degree in writing. In his spare time, he collects console and arcade game hardware, is a motorcycle enthusiast, and enjoys trapping blue crabs. Stephen's first mobile device was a 624 MHz Dell Axim X30, which he's convinced is still a viable platform. Stephen longs for a market where phones are sold independently of service, and bandwidth is cheap and plentiful; he's not holding his breath. In the meantime, he devours smartphone news and tries to sort out the juicy bits Read more about Stephen Schenck!