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4 Wire Restistive Touch screen technology
    The 4 Wire Resitive touchscreen consists of a glass layer with a conductive coating on top and a polyester top sheet with a conductive coating on the bottom. The conductive surfaces are held apart by "spacer dots", usually glass beads that are silk-screened onto the coated glass.
     When a person presses on the top sheet, its conductive side comes in contact with the conductive side of the glass, effectively closing a circuit (this is called pressure sensing). The voltage at the point of contact is read from a wire connected to the top sheet.It can be touched by finger, gloved finger, leather or stylus pen.It is inherently of many advantages such as high accuracy, quick response, drift-free, stable and long durability for a life time of 1,000,000 times finger touches.
5 Wire Restistive Touch screen technology
    The 5 wrie resistive touch screen is a two-layer structure, two materials (film or glass) with ITO are attached with a gap between them so that the ITO layers are facing each other. Touch input will be made as the top layer is pressed down and the two ITO layers contact. There are insulators called spacing dots between the top and bottom ITO layers. These spacing dots prevent unintended contacts (inputs) of the ITO layers when not pressed.
     When the top ITO film is pressed and makes contact with the bottom glass, the contacted area will be detected via electrical conduction. The notable characteristic of 5wire resistive is that only the bottom glass has detecting function. Even if the top ITO film is damaged, the detecting function will not be affected (except for the damaged area).
Capacitive touch screen technology
    Capacitive touch screen is a four-storey glass screen surface and laminated within the glass screen is coated with a layer of ITO, the outermost layer is a thin layer of silica glass, laminated ITO coating as a face, four electrode leads in the four corners, inner ITO good shielding to ensure a good working environment.
      When finger touch the metal layer that is, because the body farm, users and touch-screen surface with a coupling capacitor, high frequency current, capacitance is a direct conductor, so fingers sucked away a very small amount of current from the contact point. The respectively current outflow from the touch electrode on the four corners of the screen, and flows through the four electrode current is proportional to the distance from the fingers to the four corners, controller through the accurate calculation of the four current percentage, came to the location of the touch point.
Infrared touch screen technology
    Infrared touch screen is to use a dense matrix of infra-red x, y directions to detect and locate the user's touch. Infrared touch screen installed in front of the monitor box outside a circuit board, circuit board arranged on four sides of the screen infrared led and an infrared receiver and corresponding anyway cross the infrared matrix.
   When users touch the screen, fingers will be blocked anyway after the location for both infrared and therefore can judge the position of the touch points on the screen .it can detect essentially any input including a finger, gloved finger, stylus or pen.
SAW touch screen technology
    Surface Acoustic Wave (SAW) touch screen uses ultrasonic waves that pass over the touchscreen 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. Surface wave touchscreen panels can be damaged by outside elements. Contaminants on the surface can also interfere with the functionality of the touchscreen. Surface Acoustic Wave (SAW) touch screen is based on sending acoustic waves across a clear glass panel with a series of transducers and reflectors.
    When a finger touches the screen, the waves are absorbed, causing a touch event to be detected at that point. SAW touch screen technology is recommended for public information kiosks and other high traffic indoor environments.
Interactive touch foil technology
    Interactive touch foil is transparent touch-sensitive film, affixed to the membrane in the back of the glass or transparent acrylic plate, glass or acrylic panels can instantly transform size touch screen.Only a few microns thick our thin film display screens can turn any surface into a high definition multi media display surface. Rear projected images, video and dynamic media content can be displayed in any format, anywhere.
   GreenTouch's touch foil can be pasted on a glass window or inside of a glass door and a simple back-projection or front-projection projector can turn the glass window or glass door into a large touch screen. This film enables projection of product information directly on the glass to attract interactivity with the potential customers. It is a perfect promotional display that not only provides interactive promotion and customer experience around the clock but also records the interactive data from potential customers..