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tft touch screen working principle

Beijing HTDisplay Electronics Co., Ltd.

2024-09-19

TFT (Thin Film Transistor, thin film transistor) touch screen is a commonly used electronic touch screen technology.

TFT (Thin Film Transistor, thin film transistor) touch screen is a commonly used electronic touch screen technology.The basic principle is to add a layer of transparent conductive film to the LCD screen to control the screen by detecting pressure changes at the user's touch position.

touch screen

Beijing HTDisplay Electronics Co., Ltd.——touch screen

The TFT touch screen consists of an inner liquid crystal display panel and an outer conductive film.The LCD panel is responsible for image display, while the conductive film is responsible for receiving the user's touch signal.Conductive films are usually made of transparent indium tin oxide (ITO) films, which have good conductivity and transparency.

When a user touches the screen with a finger or other object, the electric field distribution on the surface of the conductive film will be changed.

Thischangewillbedetectedbythebuiltin controller and converted into coordinate information to determine the specific location of the user's touch.The TFT touch screen can also implement multi-touch functions, allowing users to perform multi-point operations at the same time.