Comments on: The iPod Touch is out! But is it a true multi-touch device? http://www.100percentloaded.com/archives/51 Art. Design. Development. Tue, 03 Mar 2009 03:31:41 -0800 http://wordpress.org/?v=2.8.4 hourly 1 By: jrawk http://www.100percentloaded.com/archives/51/comment-page-1#comment-87 jrawk Mon, 10 Sep 2007 21:18:34 +0000 http://www.100percentloaded.com/?p=51#comment-87 ...or maybe it is projected capacitive. The two layers would be the touchscreen and the overlay material that is allowed by projected capacitive technology and completes the iPhone ID package. Projected capacitive works by measuring the interference on an electrical field by conductive materials, like ones finger or a stylus. As you near the field you pull voltage away from that area as the Electrons are attracted to your finger. Measuring the pile-ups of electrons gives you a location. Pull your finger away and the electrons discharge back into the charged grid. As there is no short involved, one can use this to measure more than one pull. Since the influence "reaches" out a few mm and also since you don't have to press two wires together as in resistive touch screens you can put a hard non-interfering material overlaying the grid of wires creating the field. That is where my money is. …or maybe it is projected capacitive. The two layers would be the touchscreen and the overlay material that is allowed by projected capacitive technology and completes the iPhone ID package. Projected capacitive works by measuring the interference on an electrical field by conductive materials, like ones finger or a stylus. As you near the field you pull voltage away from that area as the Electrons are attracted to your finger. Measuring the pile-ups of electrons gives you a location. Pull your finger away and the electrons discharge back into the charged grid. As there is no short involved, one can use this to measure more than one pull. Since the influence “reaches” out a few mm and also since you don’t have to press two wires together as in resistive touch screens you can put a hard non-interfering material overlaying the grid of wires creating the field.

That is where my money is.

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