The Latest Improvements In PCAP Touch Screen Technology

The Latest Improvements In PCAP Touch Screen Technology

Below we discuss some of the features that enable this technology to overcome past challenges.

1.Touch Controller

In PCAP Touch screen, there are two main solutions for touch screen controllers, chip on the board (COB) and chip on the FPC (COF).

Chip on the board (COB), it is to make the chip and other components directly on a single PCB board. It allows the signal to be transmitted from the touch sensor to the PCB through the flexible printed circuit. Then, the IC firmware converts the capacitance data into digital touch position data, and then sends it to the host. For the larger size, generally will use COB solution.

Chip on the FPC (COF), it is to make the chip and other components directly on the flexible cable. In this case, the analog capacitance signal is converted to digital position data on the FPC, and the  serial interface will send data to the computer. If you want to use a small touch screen, then we recommend you to choose this solution, which is cost-effective.

2. Noise immunity

Electromagnetic interference (EMI) noise can interfere with the accurate detection of touch events in the PCAP touch screen. If your product application environment requires strong noise immunity, then when choosing a chip solution, you should choose a solution with strong noise immunity. If you still feel that the anti-noise effect is not good in the later stage, you can optimize it through firmware.

3. Water treatment

In some special product applications, there may be an environment with water on the touch screen, such as raining outdoors. Water or rain may cause false touch problems. In order to avoid these problems, you can choose a chip solution that supports water touch, or make a layer of anti-fingerprint effect on the surface of the touch screen.  Because the working principle of water touch is very similar to the working principle of our people touching the touch screen.  Therefore, making a layer of anti-fingerprint effect on the surface is also a problem to prevent water from being touched by mistake.

4. Touch with gloves

PCAP Touch Screen can also support the touch of different gloves. For example, in industrial control systems or medical equipment, these product applications may require the touch screen can support with gloves. If you want to support touch with gloves, you can first according to the thickness and material of your gloves. We can match you with the most suitable chip solution.