How much do you know about capacitive screens?

Introduction to capacitive screens #tft lcd display:

Principle: When a finger touches a metal layer, due to the human electric field, a coupling capacitor is formed between the user and the touch screen surface. For high-frequency power supplies, the capacitor is a direct conductor, so the finger absorbs a small amount of current from the touch point. Detect this small current change through the detection circuit to sense the position of the fingers.#TFT SCREEN # LCD

*Surface capacitive touch screen

*Projective capacitive touch screen

1. Self capacitive touch screen

2. Mutual capacitance touch screen

Which capacitive screen do you prefer?

For more information on capacitive screens, please contact us add@chenghaolcm.com

                                   June 14, 2023