A capacitive touch controller robust to display noise for ultrathin touch screen displays
Capacitive touch screens have become widely adopted in mobile applications. Capacitive
touch-screen display modules have conventionally been assembled by bonding two
separate modules: 1) a touch-screen module with touch panel glass or film attached to the
cover window, and 2) a display module, with a small air gap between them. An important
role of the air gap is to decrease capacitive coupling of display noise to the sensors, and it is
very effective since permittivity of air is more than 4χ lower than that of glass.
touch-screen display modules have conventionally been assembled by bonding two
separate modules: 1) a touch-screen module with touch panel glass or film attached to the
cover window, and 2) a display module, with a small air gap between them. An important
role of the air gap is to decrease capacitive coupling of display noise to the sensors, and it is
very effective since permittivity of air is more than 4χ lower than that of glass.
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