Generally speaking, an iPad without a film will not be scratched by a pencil because the screen of the iPad is made of high-strength Gorilla Glass; however, it will wear out to a certain extent over time, so when using the iPad, Try to put a layer of tempered film on the screen to effectively protect the screen.
The operating environment of this tutorial: iPadOS 14 system, ipad 2021.
Will the iPad be scratched by the pencil if it doesn’t have a film attached?
The iPad will not be scratched by the capacitive pen without a film attached. The iPad screen will not be scratched under normal use without a film, because the iPad screen uses high-strength Gorilla Glass.
ipad2021 Generally speaking, it will not be scratched if you use a pen directly without a film, but it will cause some wear and tear on the screen over time. Therefore, when using the iPad, try to apply a layer of tempered film to the screen. film, which can effectively protect the screen.
The capacitive pen is a pen made of conductive materials with conductive properties and used to touch the capacitive screen to complete human-computer dialogue operations. Capacitive pen is an auxiliary device that uses conductive materials to imitate the human body (usually fingers) to complete human-machine dialogue.
Working Principle
Capacitive touch screens work by utilizing the current induction of the human body. It is a four-layer composite glass screen. The inner surface and interlayer of the glass screen are each coated with a layer of ITO (coated conductive glass), and the outermost layer is a thin layer of silica glass protective layer. The ITO coating serves as the working surface, with four electrodes drawn from the four corners. The inner ITO layer serves as a shielding layer to ensure a good working environment.
When a finger touches the metal layer, a coupling capacitance is formed due to the electric field of the human body, the user, and the surface of the touch screen. For high-frequency current, the capacitance is a direct conductor, so the finger is sucked away from the contact point. A very small current.
This current flows out from the electrodes on the four corners of the touch screen respectively, and the current flowing through these four electrodes is proportional to the distance from the finger to the four corners. The controller accurately calculates the ratio of these four currents. , to obtain the location information of the touch point.
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