| Summary: | 碩士 === 國立交通大學 === 顯示科技研究所 === 99 === The dual gate IGZO TFT is proposed to be used in an active matrix touch sensing circuit
with a RC low-pass filter. Since the dual gate IGZO TFT can be controlled by both its top and
bottom gates, only one TFT is needed in the proposed circuit, which enlarges the open ratio of
sensing pixel. By a touch event which increases the RC time-constant, a significant transient
ON current is generated to be the sensing signal. This signal can be easily read out and thus
reduce the cost of peripheral ICs. In addition, this sensor consumes less standby power
because no signal current occurs if it is not touched. In such design, it makes considerable
improvement over the drawbacks of previous touch sensing technology. Thus, we believe the
proposed sensing circuit could be an excellent way to implement active matrix touch panels.
|
|---|
