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As an official partner, ICS provides Japanese quality DMC brand touch series defined as high reliability, flexible response, responsive support system, and wide range of solutions. DMC occupies more than 50% share of the industrial-facility market in Japan and offers various sizes of off-the-shelf touch screens that fit most displays.

Resistive

Resistive is the most common type of touch screen technology. It is a low-cost solution found in many touch screens, including hand-held computers, PDAs, consumer electronics, and point-of-sale-applications. The resistive screen is popular because of its relatively low price (at smaller screen sizes), and ability to use a range of input objects (fingers, gloves, hard and soft stylus).

A resistive touch screen uses a controller and a specially-coated glass overlay on the display face to produce the touch connection. The touch screen panel consists of two thin, electrically conductive layers separated by a narrow gap. When an object, such as a finger, presses down on a point on the panel's outer surface the two layers become connected and then cause a change in the electrical current which is registered as a touch event.


Capacitive

CST Surface Capacitive Touch Screen is a human-machine interactive interface comprised of a conductive-material-coated glass panel. Current is uniformed on the glass panel entirely. By touching a finger on the panel, current flows via the finger and the ratio of the current flow is computed in order to detect the touch location. Due to a simple and robust design, CST Surface Capacitive Touch Screen fully exerts its capability without losing its touch performance in any harsh environment.


Projected Capacitive

Projected capacitive touch panels are built with two parallel layers of ITO but, unlike resistive touch panels, the ITO layers in a projected capacitive touch panel are sealed between two sheets of glass by an optically clear adhesive. There is no air gap between layers like in a resistive touch panel. The patterns on the two parallel ITO layers form a grid of capacitors. The electric fields of these capacitors are projected through the top layer of glass.

Infrared (IR)

Infrared touch screen is the latest technology and it supports the most reliable touch technology. Our infrared touch screen consists of a touch frame which is installed in front of the display. The frame is integrated with a printed circuit board which contains a line of IR-LEDs and photo transistors hidden behind the bezel of the touch frame. The bezel shields the parts from the operation environment while allowing the IR beams to pass through. We provide details of large size touch screen and overlay touch screen.


Surface Acoustic Wave (SAW)

SAW technology provides good image clarity because it uses pure glass construction. Compared to resistive and capacitive technologies, SAW provides superior image clarity, resolution and higher light transmission. However, it was originally designed for smaller screens and may not scale easily to screen sizes over 30."

SAW technology uses ultrasonic waves that pass over the touch screen panel. When the panel is touched, a portion of the wave is absorbed. This change in the ultrasonic waves registers the position of the touch event and sends this information to the controller for processing.

SAW technology is used in ATMs, amusement parks, kiosks, and in banking applications.


Pros & Cons of Touch

Feature Resistive Capacitive PCT SAW IR
Clarity of image X AA AAA AAA AAA
Designed for large displays X A AAA A AAA
Resistance to vandalism X AA AAA AAA AAA
No calibration drift A AA AAA AA AAA
Easy to manufacture AAA AA AA AA AA
Ease of integration AA A A AAA AAA
Stylus independent AAA A AA A AAA
Touch Accuracy AA AAA AAA AA AAA
Sealable, resistant to dust AA AA AAA AAA AAA
Cost Effective A AA AAA AA AA

Touch Technical Comparison

  Four-Wire Resistive  Five-Wire Resistive  Capacitive PCT Surface Wave(Saw) Infrared Touch (Ir)
Technology Resistive Resistive Electrostatic field Electrostatic field Sound waves Light interruption
PRODUCT SIZE   1.7” ~ 24”  10.4” ~ 25”  6.4" ~ 32”  3.4" ~ 100" 8.4” ~ 42”  10.4” ~ 150” 
TOUCH LIFE   1 . 2 million touches   30 . 35 million touches  225 million mechanical touch 225 million mechanical touch 50 million touches  600 million mechanical touch
Calibration Requires periodic recalibration Requires periodic recalibration due to wearing of coatings No drift, therefore no recalibration is required No drift, therefore no recalibration is required Requires periodic recalibration No drift, therefore no recalibration is required
Sensor substrate Polyester top sheet, glass substrate with ITO coating Polyester top,bottom sheet, glass substrate with ITO coating Glass with ITO coating Glass with  microfine wires  Glass with ITO coating Any substrate
Multi-touch Single point touch  Single point touch  Dual point touch (window7) Dual point touch (window7) Dual point touch (window7) supported multi touch (window7)
SCRATCH RESISTANCE   Hard Coated  Hard Coated  Hard Coated (SiO²)  Glass Overlay Moh’s hardness rating of 7  Glass Overlay Moh’s hardness rating of 7  Glass Overlay Moh’s hardness rating of 7 
INPUT METHOD   Finger, Gloved Hand, Stylus Finger, Gloved Hand, Stylus  Finger  Finger  Finger, Gloved Hand, Soft pliable stylus  Finger, Gloved Hand, Stylus 
CONTROLLER   USB, RS232  USB, RS232  USB, RS232  USB, RS232  USB, RS232  USB, RS232 
SEALABILITY   IP65 IP65 IP65 IP65 IP64 IP65
Transmissivity
/optics
>82%, some distortion to graphics due to coatings >82%, some distortion to graphics due to coatings  good >91% Very good >91% ~ 95% good >90%  Very good >91% ~ 95%
Drag and drop Requires constant pressure to draw smooth lines Requires constant pressure to draw smooth lines Requires constant pressure to draw smooth lines Requires constant pressure to draw smooth lines Requires constant pressure to draw smooth lines Low resolution due to spacing of IR sensors and interpolation
Size constraints Originally designed for smaller sizes and may not scale easily; largest sensor is 19" Originally designed for smaller sizes and may not scale easily; largest sensor is 25" Originally designed for smaller sizes, and may not scale easily; largest is 32" Scales to larger size Originally designed for smaller sizes and may not scale easily; largest is 42" Scales to larger size
Application  ATM, Mobile, Navigation, Industrial system ATM, POS Gaming machine, Kiosk, DID  Kiosk, DID, Electronic board