Capacitive Touch Screen

Projected Capacitive Touch Screen

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.

Product Advantages

Item Standard
Size Range 7" ~ 21.5"
Type Digital
Input Mode Finger, Gloved Hand Activation
Operating Temperature 0℃~60℃ (20%RH ~ 85%RH)
Storage Temperature -10℃~70℃ (10%RH ~ 90%RH)
Transparency  ≧90%
Linearity  1.5%
Structure  Glass/Glass
Hardness  ≧7H
Operating Force  ≦10g
Loop Resistance  500~1000 ohm
Knock Test  350,000,000 times

Market Application

Since projective capacitive touch screens offer advantages such as high transmittance, water/dust resistance and hard surface. Applications such as handheld device like Smart phones, MID etc.

Surface Capacitive Touch Screen

The surface capacitive touch screen manufactured by utilizing the ITO (Indium Tin Oxide) at the touch screen surface to achieve a change in electrical current upon contact with the human body. The change is registered by the sensors placed at the four corners and transmitted to the controller as an analog signal. The signal will then be processed by the controller before it is sent to the system as a digital signal to be displayed visually on the monitor.

Product Advantages

Highly transparent with a transmittance of 95%~99%. Tempered glass with a scratch hardness of 7H: the Vandal-Proof structure makes the product more suitable for systems in public places. High sensitivity: the touch screen functions by sensing electrical currents from the human body and is capable of offering immediate response at the slightest touch (a response time within 16ms at a stress load of below 30g). The extremely high transmittance (up to 99%) and 7H of scratch hardness, coupled with water and dust resistant surface design makes the product best suited for general public applications.

Item Standard
Size Range 7" ~ 21.5"
Input Mode Finger or Stylus
Operating Temperature -20℃ ~ 70℃
Storage Temperature -40℃ ~ 85℃
Transparency  95%↑
Linearity  1.0%
Hardness  7H
Operating Force  <30g
Knock Test  350,000,000 times
Customize Various Size  5" ~ 24"
Scope of Application  KIOSK, ATM, POS, Touch Monitor

Market Application

Since surface capacitive touch screens offer advantages such as high transmittance, water/dust resistance and hard surface, it will make the best option for applications in public places when matched with the vandal-proof structure. Applications such as ATM, POS, automatic ticket vending systems, gambling machines and entertainment arcade cabinets work best with our capacitive touch screens.