Leading capacitive touch screen technology
Capacitive touch screen is an advanced touch technology that uses the coupling capacitance formed by the human body's electric field and the screen to determine the touch position. It has the advantages of multi-touch, fast response, high light transmittance, and rich gesture operation. It is widely used in electronic devices such as smart phones and tablets, but the cost is relatively high, and it relies on conductive materials for operation and is easily affected by the environment.
80ºC,240hrs, Normalized for 24 hrs
-30ºC,240hrs, Normalized for 24 hrs
60ºC/90% RH,240hrs normalized for 24 hrs
-40 ~ 85℃, 60 Mins/cycle , Total 30 Cycles, Normalized for 2 hrs
>1，000,000
Basic structure: It is generally composed of four layers of composite glass screen. The inner surface and interlayer of the glass screen are coated with a layer of indium tin oxide (ITO). The outermost layer is a thin layer of silica glass protective layer. The interlayer ITO coating is used as the working surface. Four electrodes are led out from the four corners. The inner layer ITO is a shielding layer to ensure a good working environment.
Covering layer and insulating layer: The top covering layer is usually tempered glass or polyethylene terephthalate (PET). The advantage of PET material is that it can make the touch screen thinner and relatively low in cost. The insulating layer includes glass, organic film, adhesive, air layer, etc. Its function is to isolate the conductive layer from the outside world and the electrical interference between different conductive layers.
Electrodes and leads: Electrodes are usually long and narrow, distributed at the four corners or four sides of the touch screen, connected to the control circuit through leads, and are responsible for transmitting the capacitance change signal generated by touch to the controller in order to calculate the position of the touch point.
• Capacitive touch screen panel use a conductive material (usually indium tin oxide) to sense the touch of a finger. The screen consists of a layer of glass coated with a conductive material. When you touch the screen with your finger, the charge from your finger changes the voltage at that point on the screen. Capacitive touch screen panel are generally more sensitive and accurate than resistive touchscreens. They are also more durable and last longer.
• Resistive touch screen panel use two layers of conductive material separated by a small gap. When you touch the screen, the two layers come into contact and the touch screen controller can detect where the touch is. Resistive touch screen panel are less expensive than capacitive touch screen panel, but they are also less accurate and responsive. They are more prone to wear and may require frequent recalibration.