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Difference between resistive and capacitive screens

Do you know the difference?

With the advance of technology many trends have been overcome, always replaced by more modern technologies that are easier to use and provide products that satisfy people more. This is what happened to the touchscreens screens. Today the most advanced technology used in making these screens to capacitive that is an evolution of the previous resistive. touch After the introduction of iPhone in the market, Apple dictated the rule: Smartphone have to have a touchscreen (There were touchscreen devices before, but none were so trendy). First we must know which screens equip certain devices, the resistive screens today they equip almost everyone Smartphones gives Nokia running Symbian operating system, examples: Nokia N97, 5800, 5530, 5230, N97 Mini (with the exception of N8, E7 and X6) in addition to the famous Chinese made generics. J the capacitive has as its greatest example the iPhone, who pioneered using this technology in the mobile industry and more recently the powerful Samsung Galaxy S.

How Resistive Screens Work

The resistive screen detects the touch position according to the junction of two overlapping conductive plates. When the user touches the screen (can be with a pen or any solid object), there is a contact between the two in a certain coordinate, yes !, coordinate, since it uses horizontal and vertical lines (X, Y) to generate It is an electrical signal according to the position of the touch. Don't you understand? It's very simple, you play and depending on where, the generated signal will assume a value.

But what about the capacitive screen, how does it work?

Since the capacitive screen has different characteristics, because it works with the concept of capacitors.Capacitors? What's this? : Capacitors are electronic components capable of storing energy.But wouldn't that really be a battery?No, since capacitors store energy and are capable of discharging them in seconds or fractions of seconds, while batteries discharge in minutes or hours. Batteries through chemical reactions generate electrons, not to mention that all batteries have poles (+ and -) unlike capacitors (some capacitors also have rarer poles).Capacitive screens work with the capacitors concept, ie storing energy. When touching the capacitive sensor, in quotation marks, as it is actually made up of a lattice of laminated micro wires between two layers of glass, the concept of capacitance is put into practice and the location of the touch is calculated as a function of the change in electrical characteristics in the sensor. To recap: with touch there is a change in the electrical characteristics of the sensor and we have the position on the screen, simple no?This sensor can even be mounted behind a safety glass installation of up to 18 mm.

Multitouch screen

A multi-touch display recognizes multiple simultaneous interaction points, often also including the pressure of each independently, as well as the position. This allows gestures and interaction through multiple fingers or hands, increasing the quality of display use, contributing to direct manipulation through intuitive gestures. Depending on the size of the display, some devices support more than one user on the system simultaneously. As a conclusion, we have, that the technology is there and we have to follow it as well as decipher it, or if you want to stay behind and be a simple user.

Tip:To find out if a phone has a resistive or capacitive screen look for an object (not scratching the screen) such as a pen cap and tap the screen if it triggers any function of the device (replacing your finger) the resistive screen if you can only trigger some function using your fingers on the capacitive screen.

Source: Tekimobile

Founder of blog and channel Diolinux, passionate about technology and games.