Why should some computer screen handwritten pens need to be charged
Response:
Of course, because of different rationales, handwritten pens are actually divided into source and non-source pens from the point of view of whether internal power is needed。
The sourceless pen actually emerged during the saban era, when the screens on the mobile phone could be electrical barriers, which, when under pressure, would change the screens, and mobile phones would test the voltage to determine the location of the touch. So, the handwritten pen for the screen is just a pressure, and you can make a handwritten pen like a matchbook, and naturally you don't need an internal power source。
Modern electronic equipment, however, often uses electric screens, which use human currents to achieve touch screen effects, and when a human hand touches the screen, the finger and the working surface of the touch screen form a coupling of the face, changing the electron signals inside the screen and thus determining the position of the touch screen. With regard to the screen, handwritten pens like matches are useless, so there are electric pens and electromagnetic pens, which have both no source pens and no source pens, and technical solutions, many of which are not open, so here is just a brief introduction。
Some are simply mimic fingers, and pens use the guidance material at the tip, which is enough to cause a change in the screen's electrical capacity to achieve a touch effect. Like emr (electromagnetic sensor input technology, electro-magnetic resonance), the emr technology can also achieve passive effects by placing electromagnetic sensors inside the screen, saving energy from moving handwritten pens through electromagnetic sensors, sending energy back to the sensory panels through the resonance circuit in the pen, and locating the tip of the pen by detecting changes in the energy of the sensor plate。
There are also a large number of available technology options, more typically known as active projected capacitance stylus, active p-cap stylus. This sourced pen can constantly send low-frequency signals containing information such as the pressure felt at the tip of the pen and the id serial number of the pen. On the machine screen, there is a grid-shaped projector sensor that is responsible for the whole touch and pen sense。
References:
Handwritten pen skills are not complete
By frost
