Capacitive touch screen technical parameters:

• Touch screen Type: Projected Capacitive Touch Screen PCT
• Hardness: 7Hapressure 750g
• Touchpoint: 10point_WIN7 and above OS
• Transparency: >87%
• OS: WINDOWS XP (Need driver), WINDOWS7, win8.etc
• Thickness:9±0.05 mm
• Touch life: 200,000,000 times
• Resolution: 4096×4096
• Interface: USB, I2C, RS232
• Input voltage: DC 5V.

Eagle Tech capacitive touchscreen support gloves touch (under 2mm thickness medical gloves and latex gloves)

What is a capacitive touch screen?

The human body’s current sensing is used by capacitive touch screen technology. The capacitive touch screen is made of four layers of composite glass. ITO is applied to the inner surface of the glass screen and the interlayer. The outermost layer is a thin layer of quartz glass that serves as a protective layer. The working surface is an intermediate ITO coating. The inner layer of ITO, in addition to four electrodes, serves as a shielding layer to ensure a safe working environment. Due to the electric field of the human body, when a finger touches the metal layer, a coupling capacitance is formed between the user and the surface of the touch screen. For high-frequency currents, the capacitor is the direct conductor, so the finger draws very little current from the point of contact. This current flows out of the electrodes located on the four corners of the touch screen, and the current flowing through these four electrodes is proportional to the distance between the finger and the four corners. The position of the touch point is determined by precisely calculating the ratio of the four currents.

How does a capacitive touch screen work?

Capacitive touch screens take input from the electrical properties of the human body. When a finger is touched, a small electrical charge is drawn to the point of contact, allowing the display to detect where the input has been received.

The capacitive touch screen is made of an insulator-like glass coating covered with a see-through conductor like indium tin oxide (ITO). The ITO is secured to glass plates, which compress liquid crystals in the touch screen. When a user activates the screen, an electronic charge is generated, which causes the liquid crystal to rotate.

What are PCAP Touch screen Advantages and Disadvantages?

Pros:

1. The capacitive touch screen only requires a touch; no pressure is required to generate a touch signal.
2. Most capacitive touchscreens require only one calibration after production, if at all. Resistive technology, on the other hand, necessitates regular calibration.
3. Because the components in the capacitive touchscreen do not require movement, the capacitive solution has a longer lifespan. In resistive touch screens, the upper ITO film must be thin enough to bend down and make contact with the underlying ITO film.
4. In terms of optical loss and system power consumption, capacitive technology outperforms resistive technology.
5. The choice of capacitive or resistive technology is heavily influenced by the object that makes contact with the screen. Capacitive touch screens are preferable for finger touch. A resistive touchscreen will suffice if you require a stylus, whether plastic or metal. Capacitive touchscreens can also be used with a stylus, but a special stylus is required.
6. Because capacitive technology is wear-resistant, it has a long service life, and has low maintenance costs when used by users, manufacturers’ overall operating expenses can be reduced further.
7. Capacitive touchscreens can support multiple touches and are less responsive and prone to wear than resistive touchscreens.

Cons:

1. The capacitive screen, in theory, uses the human body as an electrode of a capacitor element. When a conductor close to the interlayer ITO working surface is coupled with a sufficiently capacitive capacitor, the current flowing away is sufficient to cause the capacitive screen to fail.
2. Because of the addition of a more insulating medium, capacitive screens do not respond when touched with a very thick or isolated gloved hand or held by a non-conductive object.

Applications of PCAP Touch Screens

• Multi-touch Monitors: End users can use multi-touch monitors to complete digital tasks in a direct manner. They only need to move things around or perform different functions by touching the screen. These monitors help employees improve their efficiency and productivity, especially if group collaboration is a part of their job.
• Multi-touch Open Frames: Multi-touch frames have emerged as simple and low-cost solutions for converting standard screens into touchscreens. These frames can be used by multiple people at the same time. These overlays are extremely useful in office settings where multiple people are operating the same digital system at the same time. These multi-touch frames aid in completing tasks more quickly.
• Control Panels: End-users can have specialized industry-proven control panels to assist them in reaching their professional goals in record time, given the digital and marketing necessities of the These multi-touch control panels save time, money, and valuable resources while reducing the effort required to complete difficult tasks. Many companies are developing applications that include multi-touch control panels and training their employees to use them in order to increase productivity.
• Public Systems: Kiosks, POS machines, payment systems, voting machines, ATMs, interactive digital signage, electronic billboards, and other public commercial systems use AMT projected capacitive (PCAP) touch screens.