Early screens used beams of infrared light projected across the screen surface. Interrupting the beams generated an electronic signal identifying the location of the screen, which was relayed to software.
Modern touch screens use a thin, durable, transparent plastic sheet overlayed onto the glass screen. The location of a touch is calculated from the capacitance for the X and Y axis|axes, which varies based upon where the sheet is touched.
The HP-150 was among one of the world's earliest commercialized touch screen computers. It actually does not have a touch screen in the strict sense, but a 9" Sony CRT surrounded by infrared transmitters and receivers which detect the position of any non-transparent object on the screen.
The first successful use of a touch screen in gaming was in the Nintendo DS portable game system in 2004. Its success led to the release of other handheld platforms focusing on touch screen gaming, particularly iOS in 2007 and Android in 2008.
- Surface Acoustic Wave (SAW)
|This page uses content from Encyclopedia Gamia, the text of Wikipedia is available under the Creative Commons Attribution-Share Alike 3.0 (unported) license. The content might also be available under the terms of the GNU Free Documentation License.. As with|