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 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.
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 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 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.
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.
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 |
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 |