How Touch screen Technology Really Works


Touch screen, since its innovation has sparked consumer frenzy in the global market, and is about to soar higher. Total Touch-Screen intentional revenue is expected to make $30 billion dollars by 2018. But the funny thing is, we use it every day, without most people knowing the electronics miracle working behind this apparatus.

Just 30 years ago, touch screen was introduced as a research enterprise, in 2007 January, Apple iPhone was handed to the common mass and it radically changed our access to touch screen. Nowadays it has swarmed into all smart electronics devices —GPS, cell phone, PC screens etc. Electronics video tutorial can rightly mark the phases of wonder how from PalmPilot petite stylus, came a transformed smart phones swipe-and-pinch interface that has changed the way how we communicate.

  • Different Methods of Touch Screen Technology


In the old days, I’m talking about pre-iPhone phase here; they used “resistive method” to devise a touch screen. “Resistive” method had a simple layout—two wafer-thin tough plastic layers, just a tiny distance apart from each other with current flowing in between. The screen rests above the layer on the upper side, and LCD display lies under the layer downward, What happens here is when you press the screen, It prompts a sensor to detect the point where these layers meet, and the digital signal pops up in harmony. This technology may lack the smoothness of today’s smart screens, but still used in ATM and other machines.

On the contrary, iPads, iPhones and latest smart phones can sense the electrical charge emanating from your skin when you lay a finger on the screen’s electrical field. How it works is quite simple. By use of “capacitive” method, the electronics device has changes in currents through the monitor screen. Electronics video projects demonstrate how the modern touch screen works with a layer of capacitive, a material capable of storing electricity.

One major difference here than the earlier version, that it’s sensitive to “multiple touch”. In a synchronized system, the capacitors are placed side by side. And this grid inside the iPad screen detects if there is any electrical changes at each point. For this reason, each point of the circuitry creates a signal when you touch the screen and the grid shoves it across to the processor. Tutorial on electronics video thus traces the variant factors influencing the touch screen technology to expand further.


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