What are the characteristics of surface capacitive technology?
Capacitive touch screen is made by coating one or more layers of conductive material (such as indium tin o
Capacitive touch screen is made by coating one or more layers of conductive material (such as indium tin oxide ITO) on the substrate, and then sealing and bonding it with a protective cover plate to protect the electrodes. When other conductive objects, such as exposed fingers or conductive pens, touch its surface, an electronic circuit is formed there, and a sensor is embedded in the glass to detect the position of the current, thus completing a touch operation.
This working method is completely different from the resistor TP relying on physical clicks.
Capacitive touch screens can be divided into the following two categories:
Plating a transparent conductive coating on a glass substrate, and then adding a protective coating on top of the conductive coating. The electrodes are placed on the four corners of the glass, and the same phase voltage is applied to all four corners, forming a uniform electric field on the surface of the glass. When a finger touches the surface of the glass, current will flow through the four corners of the glass, and the proportion of current flowing through the four corners will be measured to determine the specific location of the touch point. The measured current value is inversely proportional to the distance from the touch point to the four corners.
Technical features:
◆ More suitable for large-sized displays
◆ Reacts to very light touches and does not require sensing actual physical pressure
◆ Due to only one layer of glass, the product has a high transmittance
◆ The structure is sturdy because it is only composed of one layer of glass
◆ Moisture, dust, and oil stains will not affect the touch effect
◆ Small disparity ◆ High resolution and high response speed
◆ Does not support the combination of bare fingers and gloves, and does not support the combination of bare fingers and stylus
◆ Does not support multi touch
◆ Possible interference from noise
