Peripherals/Touch Screen: Difference between revisions

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* [http://docs.paperless-school.com/Infrared Infrared]
* [http://docs.paperless-school.com/Infrared Infrared]
* [http://docs.paperless-school.com/StrainGaugeTechnology Strain Gauge technology]
* [http://docs.paperless-school.com/StrainGaugeTechnology Strain Gauge technology]
* A simple light sensor could also do some light work. A tethered pen could detect flashed target boxes, like the old Nintendo Light Gun. For continuous drawing, the screen could flash through a series of patterns where the pen either sees light or dark. Each screen location would thus have a unique binary code flash through it, which would be reported by the pen's narrow light sensor. This screen scan will start in a small box near where the pen was last to reduce search time, and the eyesore of flickering.
* A simple light sensor could also work for a touch screen. A tethered pen could detect flashed target boxes, like the old Nintendo Light Gun. For continuous drawing, the screen could flash through a series of patterns where the pen either sees light or dark. Each screen location would thus have a unique binary code flash through it, which would be reported by the pen's narrow light sensor. This screen scan will start in a small box near where the pen was last to reduce search time, and the eyesore of flickering.
Apparently most PDA’s use 4-Wire Resistive touch screen technology. However I am not positive on this.
Apparently most PDA’s use 4-Wire Resistive touch screen technology. However I am not positive on this.



Revision as of 04:13, 15 November 2007

Technology

Different touch screen technologies:

  • 4-Wire Resistive
  • 5-Wire Resistive
  • Capacitive
  • Surface Acoustic Wave
  • Infrared
  • Strain Gauge technology
  • A simple light sensor could also work for a touch screen. A tethered pen could detect flashed target boxes, like the old Nintendo Light Gun. For continuous drawing, the screen could flash through a series of patterns where the pen either sees light or dark. Each screen location would thus have a unique binary code flash through it, which would be reported by the pen's narrow light sensor. This screen scan will start in a small box near where the pen was last to reduce search time, and the eyesore of flickering.

Apparently most PDA’s use 4-Wire Resistive touch screen technology. However I am not positive on this.

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