CREU Project Blog


Multitouch LED Display PART IV (NEW PROBLEM ARISES~!!)
October 21, 2007, 7:00 am
Filed under: LED Display, Multitouch

Now that the Bidirectional LED demo is working but we realized a few problems. 

The refresh rate is too slow.  It appears that it is taking too much time for the LED to discharge.  However this is quite minor, we fixed this by grounding the LED using a resistor. 

 When we try to extend this to the 8×8 LED Matrix we found a much bigger problem and we are quite clueless as to how to solve it.  When we work with the matrix, we are not dealing with a single LED.  All the LED are connected to each other by the matrix.  The problem is that when a user places a finger on an LED, all the matrix in the entire array is distrubed, so it is almost impossible to determine where the user is touching. 

We don’t really have a solution right now but we are thinking about switching to a multitouch surface instead. 

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