Sitronix

Voltage-Driven Multi-touch Technology

Advantage & Technology Comparison

• Compare with Traditional Resistive and Analog Resistive Multi-touch Technology

Voltage-driven multi-touch technology will not consume power without touch activity, so the power consumption is lower than traditional resistive multi-touch technology.
Voltage-driven multi-touch technology realized the “TRUE” multi-touch and could track each touch path accurately; unlike the analog resistive multi-touch solution will take as a single point when two points in a little area.
Analog resistive multi-touch solution is very sensitive to ITO resistance variance and it’ll impact to production uniformity. But Voltage-driven multi-touch technology will only detect as on/off signal by comparator, which is not influenced by ITO resistance variance.
Voltage-driven multi-touch technology can sense the change of touch area and pressure, which function cannot be achieved by analog resistive multi-touch technology.

• Compare with Capacitive Multi-touch Technology

Voltage-driven multi-touch technology can accept any kinds of input devices, including finger, pen, card, or even wearing gloves. But projective capacitive solution has limited (only finger) by nature.
Projective capacitive multi-touch solution cannot operate the small icons or scroll bar under Windows Mobile 6.5 OS, and it’s has “dead area” at border. Voltage-driven technology will work accurately and precisely in any position of touch screen.
Voltage-driven solution will not be influenced by water, oil, or other greasy dirt. Oppositely capacitive solution may have error or even no action caused from the static electricity along with.
Projective capacitive multi-touch solution also easily to be influenced by EMI, RF, or even TFT scanning high pitch noise. However the noise level is much lower than the threshold value of Voltage-driven multi-touch technology, so it’ll been screened out to prevent the error action.

• Comparison Table

Comparison Item	Sitronix Voltage-Driven Multi-touch	Analog Resistive Multi-touch	Projective capacitive Multi-touch *
Multiple Point Support	Unlimited points	Limited	Limited
ITO Resistance Tolerance	Excellent	Poor	Poor
Touch Recognition Accuracy	Excellent	Normal	Poor
Area/Pressure Sensing	Excellent	Poor	Normal
Water/Oil/Greasy Dirt Poof	Excellent	Excellent	Poor
Anti-EMI/RF noise ability	Excellent	Normal	Poor
Anti-peak noise from TFT scan	Excellent	Normal	Poor
Touch medium	Finger/ Pen/ Glove (without limit)	Finger/ Pen/ Glove (without limit)	Finger (Limited)
* Except Apple iPhone projective capacitive multi-touch solution
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