What is a capacitive pen? What is the working principle of a capacitive pen? What do you need to pay attention to when buying a capacitive pen?

With the continuous development of science and technology, electronic products such as smart phones and tablet computers are constantly updated, and capacitive pens have also become standard equipment for these mobile devices to a certain extent. And if you happen to be a master of painting and design with tablet devices, it is even more inseparable from the capacitance pen. But in fact, many people are not very familiar with capacitance pens, or do not know how to use them after buying them. Today, Xiao Bian will introduce to you what a capacitance pen is? How does it work? And what do you need to pay attention to when buying a capacitive pen?

  

What is a capacitive pen? What is the working principle of a capacitive pen?

Capacitive pen, as its name implies, is a stylus pen for capacitive screen. It replaces direct contact with the screen by fingers and is mainly used in electronic devices such as capacitive screen mobile phones, tablet computers, and touch notebooks.

So what is the working principle of the capacitance pen?

Before understanding the working principle of capacitive pen, we must clarify the working principle of capacitive touch screen. The capacitive touch screen is formed by a four-layer composite glass layer. The inner surface and interlayer of each glass layer have a layer of ITO conductive material to form a current change area with induced voltage, thus, the IC in the four corners can judge the coordinate position of the sensing area. The capacitive touch screen uses the current induction of the human body to work. When the finger touches the metal layer, due to the human body's electric field, the user and the surface of the touch screen, a coupling capacitor is formed. For high-frequency current, the capacitor is a direct conductor, so the finger draws a small current from the contact point. This current flows out from the electrodes on the four corners of the touch screen, and the current flowing through the four electrodes is proportional to the distance from the finger to the four corners. The controller accurately calculates the proportion of these four currents, the location information of the touch point is obtained.

Capacitance pen is an auxiliary device that uses conductor materials to imitate the human body (mainly fingers) to complete man-machine dialogue.

Capacitive pens have brought great convenience to people's work and life, and with the advancement of technology, the current capacitive pens are no longer just a simple substitute for finger control functions, like notes, painting creation, artistic design and so on are inseparable from the capacitance pen. And the capacitance pen can also anti-scratch, anti-fingerprint, anti-oil, cleaner and more flexible than using your fingers.

What do you need to pay attention to when buying a capacitive pen?

At present, the capacitive pens on the market are mainly divided into active capacitive pens and passive capacitive pens. Active capacitive stylus, the pen body is a circuit board that can absorb and convert current. It operates by changing the current through contact with the screen, so the pen tip does not need to be too thick to cause a reaction, the accuracy during use is also higher. The active capacitive stylus tip is only 2mm, which can be used for various precise painting and writing tasks. Passive capacitive pens imitate the touch effect of fingers, so the nib is thicker.

In terms of performance, active capacitive pens are better than passive capacitive pens, but the price is much more expensive than passive capacitive pens.

If you have high requirements for the accuracy of the capacitive pen, it is recommended to choose an active capacitive pen. If you just use it casually, then there is no need to spend a lot of money to buy an active capacitive pen, just choose a passive capacitive pen, after all, the price is low, and it can also meet the needs of ordinary users. It should be noted that there are many capacitance pens on the market at present, not all capacitance pens are up to standard consumers should keep their eyes open when buying, and don't take advantage of petty gains.