How to easily test the excellence of touch screen performance of your smartphone

How can I examine the performance of a touch screen on a smartphone without using special equipment? By saying that,MotorolaMoto Labs, a research group of the company, draws a straight line on the drawing application of various smartphones and checks its performance difference. In the experiment, the touch screen which can draw a straight line when drawing a line slowly is a good performance, and the result that the line becomes a zigzag in the one with the low performance was obtained.

DIY Touchscreen Analysis on Vimeo


In order to check the performance difference of the touch screen, we will experiment with three smart phones, iPhone, HTC Droid Eris, Motorola Droid.


First off from the iPhone. Start drawing application and draw a line across the screen diagonally.


When pulling a line slowly.


If you draw a line quickly ...


Points and points on the screen are connected by a straight line, and the lines are drawn straight regardless of the performance, and there is a possibility that the correct result will not be obtained.


And I will pull it so that the lines cross in the opposite direction. The iPhone got some distortion when writing a line at the bottom of the screen, but in other places it was possible to draw a straight line.


Then HTC Droid Eris.


Like the iPhone, I slowly draw a line obliquely.


There seems to be some distortion in the line, and it looks like a wave.


You can better understand the distortion by drawing a line in the opposite direction.


The end is Motorola Droid.


Like the iPhone, it should be drawing a straight line, but the line is wavy with Gnyagna.


Drawing a line in the opposite direction no longer looks like a straight line.


So it was a touch screen performance test using three smartphones, but the results are as follows. The leftmost iPhone drew the most straight line and the lowest was Motorola Droid. You can understand the difference in performance by arranging three.


The reason that lines look zigzag like Motorola Droid is that the sensor size is too large, the touch sampling rate is too low, an algorithm that converts gestures to images can not be displayed faithfullyThere is a reason.


This is an experiment done in 2010, according to researchers one of the reasons why the sensitivity of iPhone's touch sensor is good is to use a 12-volt power supply for the detection line used for touch screen sensor It seems that there is a thing that is mentioned. Most of the component manufacturers other than Apple use a 3 to 5 volt power supply, but if the driving voltage is high, the accuracy of detection will improve and the touch experience will be good Moto Labs Researchers explain.