Why do touch screens become un-calibrated?

It seems that touch sreens, at school or on video games, become un-calibrated often, why is this so? Shouldn't they stay calibrated?

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  • Anonymous
    1 decade ago
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    Touch screens work on this principle- they're your normal LCD screen with a network of circuits on the top. When something (a finger, a stylus) breaks one of these circuits, it decides something's touching it. However, the LCD screen does not always display things correctly in correlation to the actual spot where the screen is touched. When you "calibrate" your screen, it simply takes it for granted that that area being touched matches the area on the screen and constructs the rest of the grid itself.

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  • 1 decade ago

    that happened to my hp tablet... i think it is because the digitizers often get "confused" and need to be recalibrated.

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