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| − | A '''touch screen''' is a input device that allows the user to interact with the computer by touching the display screen. [[Game console]]s which use touch screens include the [[Game.com]] and [[Nintendo DS]].
| + | #redirect [[sega:Touch screen]] |
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| − | 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.
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| − | 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 axes, which varies based upon where the sheet is touched.
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| − | The HP-150 was among one of the world's earliest commercialized touch screen computers. It actually has not 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.
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| − | [[Category:Hardware]]
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