Projected Capacitive Touchscreens

Projected capacitive touchscreens utilize an electrostatic field created by electrical current run through a grid of electrodes formed or etched on the sensor surface by electrically conductive materials.  The system registers a touch when a finger or other electrically conductive object interferes with the electrical field the screen projects above its surface and changes the field’s capacitance. The screen’s controller can then calculate the position by its X/Y coordinates; most controllers support multiple touch detection and touch gestures (pinch to zoom, expand, rotation, etc.).

Dignity offers a line of Projected Capacitive (PCAP) touchscreens (also known as PCT), with a variety of enhancements, sizes and others options. Projected capacitive touch panels offer superior performance, optical quality, lifespan, resistance to damage and other considerations compared to many other touchscreen technologies. They are widely used in consumer electronics, appliances, retail and are slowly replacing resistive and SAW screens for many commercial, industrial and medical uses.

•     Sizes from 3” up to 75"

•     Multi-touch functionality - up to 50 touch points, plus gestural support (pinch to zoom, rotate, etc.)

•     High accuracy, sensitivity and linearity without periodic calibration

•     Available in both Chip on Flex (COF) or Chip on Board (COB)

•     Full suite of screen enhancements and optical filters available"

•     Extensive customization options for cover lens materials, decoration and other aspects

•     Available in both Chip on Flex (COF) or Chip on Board (COB)

•     Broad range of ICs and functionalities supported

•     Firmware tuning support provided by in-house dedicated software engineers

Product Structure

Glass Glass - GG

GG panels consist of a glass sensor layer optically bonded to a glass cover lens; it offers excellent optical clarity, strength and light transmittance. One of the most common panel structures, especially for applications with a need for excellent optics and ruggedization.

The cover lens is composed of scratch resistant glass (average hardness of ＞7H), which can also be heat treated or replaced with specialized materials like Gorilla Glass or Dragontrail for even higher performance. The lens can be up to 6mm thick for extreme applications.

Glass Film – G1F

GFF panels are comprised of an inner layer of PET ITO film (the touch sensor), optically bonded to an outer glass cover lens; it offers a thinner and lighter stack up than GG. For applications where thickness and weight are premium.

The cover lens is composed of scratch resistant glass (average hardness of ＞7H), which can also be heat treated or replaced with specialized materials like Gorilla Glass or Dragontrail for even higher performance. The lens can be up to 6mm thick for extreme applications.

Glass Film Film – GFF

GFF panels are comprised of two inner layers of PET ITO film (the touch sensor), optically bonded to an outer glass cover lens; it offers a thinner and lighter stack up than GG with similar strength. For applications where thickness and weight are premium, but additional strength or impact resistance are needed than what G1F offers.

The cover lens is composed of scratch resistant glass (average hardness of ＞7H), which can also be heat treated or replaced with specialized materials like Gorilla Glass or Dragontrail for even higher performance. The lens can be up to 6mm thick for extreme applications.

Plastic Glass – PG

PG panels are comprised of an outer layer of plastic and an inner glass sensor layer; it is very cost competitive at smaller sizes and is lighter than an equivalent GG construction, however the plastic lens is prone to scratching. Generally for smaller applications where safety or cost is crucial.

The cover lens can be composed of a variety of plastic materials (PET, PC, Composite, etc.) depending on the product requirements. Hardness can be between 2-4H. While soft and prone to scratching, the plastic material ensures that there is no safety hazard from broken glass, reduces cost and lead time, and improves forming and silk screening capabilities.

Specifications

•     PCAP panels mechanical specifications, such as impact resistance, surface hardness and lifespan, vary widely depending on the structure selected, the type of cover lens material and thickness used, and a variety of other factors

•     PCAP electrical specifications, such as report rate, number of touch points, lag depend primarily on the touch controller that is used in conjunction with the touch panel to form a complete touch system.

•     Detailed specifications can be provided upon completing the product definition stage of a project or can be requested from our sales and technical team