AR1000 데이터 시트보기 (PDF) - Microchip Technology

부품명

상세내역

제조사

AR1000

AR1000 Series Resistive Touch Screen Controller

Microchip Technology 

AR1000 SERIES RESISTIVE TOUCH SCREEN CONTROLLER

2.3 4-Wire Sensor

A 4-wire resistive touch sensor consists of a stable and

flex layer, electrically separated by spacer dots. The

layers are assembled perpendicular to each other. The

touch position is determined by first applying a voltage

gradient across the flex layer and using the stable layer

to measure the flex layer’s touch position voltage. The

second step is applying a voltage gradient across the

stable layer and using the flex layer to measure the

stable layer’s touch position voltage.

The measured voltage at any position across a driven

axis is predictable. A touch moving in the direction of

the driven axis will yield a linearly changing voltage. A

touch moving perpendicular to the driven axis will yield

a relatively unchanging voltage (See Figure 2-1).

FIGURE 2-1:

4-WIRE DECODING

DS41393B-page 8

Preliminary

 2009-2012 Microchip Technology Inc.

Share Link: