Touch Screen technology

Posted by aayush mishra on June 15th, 2019

TouchScreen Technology :


Touch screen technology has been around for a number of years but advanced touch screen technology has come on in leaps and bounds recently. Companies are including this technology into more of their products. The three most common touch screen technologies include resistive, capacitive and SAW (surface acoustic wave). Most of low end touch screen devices contain on a standard printed circuit plug-in board and are used on SPI protocol. The system has two parts, namely; hardware and software. The hardware architecture consists of a stand-alone embedded system using an  8-bit microcontroller, several types of interface and driver circuits. The system software driver is developed using an interactive C programming language.

Types of Touch Screen Technology:

The Touch screen is a 2-dimensional sensing device made of 2 sheets of material separated by spacers. There are four main touch screen technologies: Resistive, Capacitive, Surface Acoustic Wave (SAW) and infrared (IR).


Resistive touch screen is composed of a flexible top layer made of polythene and a rigid bottom layer made of glass separated by insulating dots, attached to a touch screen controller. Resistive touch screen panels are more affordable but offering only 75% of light monitor and the layer can be damaged by sharp objects. Resistive touch screen is further divided into 4-, 5-, 6-, 7-, 8- wired resistive touch screen. The construction design of all these modules is similar but there is a major distinction in each of its methods to determine the coordinates of touch.


A capacitive touch screen panel is coated with a material that stores electrical charges. The capacitive systems can transmit up to 90% of light from the monitor. It is divided into two categories. In Surface-capacitive technology only one side of the insulator is coated with a conducting layer.

Whenever a human finger touches the screen, conduction of electric charges occurs over the uncoated layer which results in the formation of dynamic capacitor. The controller then detects the position of touch by measuring the change in capacitance at the four corners of the screen.


In infrared touch screen technology, an array of X and Y axis is fitted with pairs of IR Leds and photo detectors. Photo detectors will detect any image in the pattern of light emitted by the Leds whenever the user touches the screen.

Surface Acoustic wave:

The surface acoustic wave technology contains two transducers placed along X-axis and Y-axis of the monitor’s glass plate along with some reflectors. When the screen is touched, the waves are absorbed and a touch is detected at that point. These reflectors reflect all electrical signals sent from one transducer to another. This technology provides excellent throughput and quality.

For more ideas and tips for marketing practices for small business visit:- Technology Moon

aayush mishra

About the Author

aayush mishra
Joined: June 15th, 2019
Articles Posted: 1

Energy Science & Technology Conference Presentations
Take a look at our 16 clean energy guides from the 2020 energy science and technology conference presentations. We also have conference guides from 2010-2019 with over 50 authors. - The Next Generation Crypto-Currency Exchange - Build a fearless future
America's leading blockchain technology provider and most reliable cryptocurrency trading platform.
Make Money While You Sleep - 12 Minute Affiliate System
Our breakthrough software uses proprietary sales technology that generate sales while you’re tucked away in bed. Try our 12 Minute Affiliate System and you’ll find everything you need including 100% done for you affiliate sales funnels, easy push button
Tyranny Liberator - Get Real Savings on Your Electricity Bill
Take a look at our video for a special presentation on how to save money on your electricity bill with hidden photovoltaic technology. You can get the entire Tyranny Liberator package along with free support for only $37.
Nano Towels - A Revolutionary Piece Of Fabric
The paper towel sitting in your kitchen seems to be a normal necessity in everyday life. But did you know that they do enormous damage to you and to the environment? Our Nanolon Fiber is a revolutionary fabric technology that is hundreds of times finer
Transistor Amplifier und Amplifier Technology
In dieser einzigartigen Sammlung von Patenten finden Sie insgesamt 2719 Seiten hochinteressanten Materials sowie detaillierte Beschreibungen und präzise Schaltungszeichnungen verschiedener Transistorverstärker für einen weiten Anwendungsbereich, z. mit ne