Projected Capacitive Touch Screen

Introduction

The projected capacitive touch screen works on the principle of conventional capacitive touch screens with the addition of two sensing arrays (X and Y) on two different layers that are perpendicular to each other along with a drive line. As X and Y arrays exist on different layers, the point where the two intercept becomes a capacitive node. When electrical currents run along one of the arrays through the drive line, the other array and the circuitry that detects change in capacitive values becomes connected. During actual operation, the controller sends electrical currents to the drive lines on different layers to create a specific electrical field with the nodes.   When the user places his finger or uses a touch medium close to the touch screen, the controller immediately picks up the change in capacitive value between the nodes and drive lines to pinpoint the exact location of the touch event. Since the sensing arrays on the panel form a 3D electrical field that is independent to the surface capacitors, the touch event registers even when no physical contact with the touch screen is made. In other words, projected capacitive touch screens feature Z-axis recognition.

Advantage:

1. Honeycomb structure.
2. Independent signal output.
3. Realizes multi touch capabilities. 
4. Touch screens can be built in specific dimensions requested by clients in custom orders.

Application:

Financial - ATM & Bill Pay Kiosks and retail kiosk

The industrial control and HMI (Human Machine Interface)

Equipments and instruments touch interface

The touch applications in public domain

Entertainment & Recreation

Factory Automation

POS terminals

Industrial Control

Medical Equipment

Specification:

Item

　Standard

　Size Range

　7"~21.5"

　Type

　Digital

　Input Mode

　Finger, Gloved hand activation

　Operating Temperature

　-20℃~70℃ (20%RH~85%RH)

　Storage Temperature

　-40℃~80℃ (10%RH~90%RH)

　Linearity

　1.5%

　Structure

　Glass/Glass

　Hardness

　Mohs 5 for clear type

　Operating Force

　≦10g

　Haze

　< 3% based on clear surface for GFFF structure

  Light Transmission

　87% ± 3% for GFFF structure

Part No

Size

Thickness

Tail Design

Outside Area (mm)

Active Area (mm)

Overall (mm)

AP-PT007

7

1.7

FPC/ZIF

172.60 * 113.44

159.60 * 97.44

AP-PT008

8.4

1.7

FPC/ZIF

192.90 * 153.30

178.40 * 135.80

AP-PT010

10.1

1.5

FPC/ZIF

239.46 * 163.10

221.96 * 140.60

AP-PT110

10.4

1.7

FPC/ZIF

228.20 * 180.10

211.03 * 158.42

AP-PT012

12.1

1.7

FPC/ZIF

268.50 * 210.50

252.00 * 190.50

AP-PT112

12.1

1.7

FPC/ZIF

283.12 * 189.20

267.12 * 169.20

AP-PT015

15

2.4

FPC/ZIF

327.60 * 255.60

310.10 * 234.10

AP-PT115

15.6

2.4

FPC/ZIF

367.23 * 223.54

344.23 * 193.54

AP-PT018

18.5

2.2

FPC/ZIF

437.80 * 265.40

409.80 * 230.40

AP-PT021

21.5

2.2

FPC/ZIF

521.64 * 316.11

476.64 * 268.11