Capacitive touch screens, in contrast to resistive, it is convenient to use without the stylus.
But the need for this tool still arises, if it is necessary not to press the virtual key, but something to write or draw.
One of the devices intended for this was recently patented by Apple.
Stylus designed for resistiveTouch screen, the capacitive does not fit. The reason for this is simple: a capacitive sensor responds to the touch of only conductive objects. Even if you wear a glove on your palm, you can not control your phone. Unless the glove is used special, with conductive patches at the fingertips.
Mass transition from resistive screens toCapacitive in all smartphones, except the cheapest, fell in love with almost everyone - except those who wish to write or draw on them. Soon, the market was released a lot of stylus of a new type, designed specifically for devices with such displays. From the former, they are distinguished by the presence of conductive tips, on the touch of which the sensors respond. And Samsung was one of the first to decide to include a stylus in a set of one of its devices - Galaxy Note.
But the new stylus, patented by AppleIn May 2012, does not affect the capacitive display sensor directly. It itself contains a built-in microcomputer that communicates with a phone or tablet via a wireless interface (which is not yet announced). In this case, the ability to act on the touch screen with your fingers still remains.
The technology used in the newTool, is not new: it is based on a miniature video camera. Similar solutions are applied in the Nintendo Wii Remote, as well as in all optical mice. But it was in the stylus that the camera was used as a sensor for the first time. In this case, it is directed directly to the screen of a smartphone or tablet. By what part of the picture gets into the frame, the device determines its location.
If you now press the stylus on the screen,The pressure sensor built into the instrument will work. If you start to move it, the speed of movement will be determined not only from the information from the camera, but also from the data obtained from the built-in semiconductor accelerometer.
Everyone likes the new Apple stylus, except for one: You can not buy it yet. It is not only not yet released, but the date of its launch in production does not say a word. One thing is clear: he will probably see the light within the next 20 years. While the patent has not expired.