Do you know the difference between a capacitive touch screen and a resistive touch screen?
2019-02-26
Company news
The construction of a capacitive touch screen,mainly to plate a transparent film conductor layer on the glass screen,then add a protective glass to the outside of the conductor layer,plate narrow electrodes on all four sides of the touch screen,a low voltage alternating electric field is formed in the electrical conductor.When you touch the screen,due to the existence of the human body electric field,a coupling capacitor is formed between the finger and the conductor layer,the current from the four electrodes will flow to the contacts,the current strength is proportional to the distance from the finger to the electrode,the controller behind the touch screen can calculate the ratio and strength of the current,then can accurately calculate the location of the touch point.
Compared with the resistive touch screens that are common in the market at that time,capacitive touch screen has obvious advantages,no pressure is needed to generate the signal,while the resistive touch screen is activated by pressure.Second,the capacitive touch screen has a long average life.Third,for the resistive touch screen, the upper film needs to be thin enough to be elastic so as to be bent downward to contact the underlying film, so it is easily damaged.And the covers of capacitive touch screen can be thicker, also have glass protection and have good scratch resistance, which can better protect conductors and sensors.In addition, capacitive touch screen is more durable, not easy to aging, high temperature resistance.Moreover, the double-glass design of capacitive touch screen can effectively prevent the impact of external environmental factors on the touch screen,even if the screen is stained with dirt, dust or oil stains, the capacitive touch screen can still accurately calculate the touch position.the more important thing is,at this time, the touch screen has evolved from an early analog touch screen to a digital touch screen, can achieve multi-touch.
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