Touch Technology: How it Works
November 16th, 2009
Rebecca Beckett asked:
The main technology that makes the touchpad and touch screen panel work is called capacitive technology. Touch sensors can be found dating back many years. However, they have been gaining more and more popularity. From the iPhone to the checkout at the grocery store, touch screen technology is literally everywhere. And, its popularity is growing.
A capacitive touchscreen panel is coated with a material (typically indium tin oxide) that conducts an electric current continuously across the sensor. When this electrical field is engaged with another field (i.e. a finger) the information is sent through the panel. Capacitive sensors work based on proximity and do not have to be touched directly to be engaged.
Touchscreen first became known in the second half of the 1960’s. The first project that included this type of technology was a computer-assisted learning terminal known as the PLATO project. Then it started to become familiar in stores at kiosks and as point of sale systems. Today it is utilized in ATMs and PDAs as well as gaming systems, computers, televisions and phones. There are other types of touchscreens available as well. Here is a brief look at some other touch screen technologies that exist.
Resistive
This type of touchscreen is composed of several layers. The most important of these layers are thin, metallic, and electrically conductive and resistive, separated only by a small space. When an object touches the screen the layers are connected and there is an electrical act. These types of screens are generally cheaper because they offer much less clarity than other touch technologies
Surface Acoustic Wave
Here an ultrasonic wave passes over the touchscreen panel. When the panel is touched the wave is absorbed. The wave registers the touch and sends the information back into the machine to be processed. These types of screens are very sensitive and many are easily damaged.
Dispersive Signal Technology
This was introduced in 2002 and uses sensors to detect the mechanical energy in the glass that occur due to the touch. It involves complex algorithms that interpret the information provided from the touch on the screen.
Touchscreen technology is numerous and involves other such technologies as strain gauge, optical imagining and acoustic pulse recognition. Many different ways to engage touch in technology have become popular. Some are clearly easier to incorporate than others and some are much more cost effective as well.
Touch technology can be confusing for those of us who don’t hold a degree in engineering. The thought that an electrical current passes through our fingers and interacts with a screen to result in something is amazing. Most of the time we take for granted the fact that complex technology helped to create the ATM we are using, the self-check out that we are rushing through or the iPod we just purchased. The technology is amazing and so is the way it can be put to use in our lives. We won’t see the end to the use of this technology any time soon as it is increasingly gaining popularity. It seems that touch technology is here to stay. And, even if we can’t quite figure out how it all works, we can still think it is cool.
Ipoddownloadsecrets.com
The main technology that makes the touchpad and touch screen panel work is called capacitive technology. Touch sensors can be found dating back many years. However, they have been gaining more and more popularity. From the iPhone to the checkout at the grocery store, touch screen technology is literally everywhere. And, its popularity is growing.
A capacitive touchscreen panel is coated with a material (typically indium tin oxide) that conducts an electric current continuously across the sensor. When this electrical field is engaged with another field (i.e. a finger) the information is sent through the panel. Capacitive sensors work based on proximity and do not have to be touched directly to be engaged.
Touchscreen first became known in the second half of the 1960’s. The first project that included this type of technology was a computer-assisted learning terminal known as the PLATO project. Then it started to become familiar in stores at kiosks and as point of sale systems. Today it is utilized in ATMs and PDAs as well as gaming systems, computers, televisions and phones. There are other types of touchscreens available as well. Here is a brief look at some other touch screen technologies that exist.
Resistive
This type of touchscreen is composed of several layers. The most important of these layers are thin, metallic, and electrically conductive and resistive, separated only by a small space. When an object touches the screen the layers are connected and there is an electrical act. These types of screens are generally cheaper because they offer much less clarity than other touch technologies
Surface Acoustic Wave
Here an ultrasonic wave passes over the touchscreen panel. When the panel is touched the wave is absorbed. The wave registers the touch and sends the information back into the machine to be processed. These types of screens are very sensitive and many are easily damaged.
Dispersive Signal Technology
This was introduced in 2002 and uses sensors to detect the mechanical energy in the glass that occur due to the touch. It involves complex algorithms that interpret the information provided from the touch on the screen.
Touchscreen technology is numerous and involves other such technologies as strain gauge, optical imagining and acoustic pulse recognition. Many different ways to engage touch in technology have become popular. Some are clearly easier to incorporate than others and some are much more cost effective as well.
Touch technology can be confusing for those of us who don’t hold a degree in engineering. The thought that an electrical current passes through our fingers and interacts with a screen to result in something is amazing. Most of the time we take for granted the fact that complex technology helped to create the ATM we are using, the self-check out that we are rushing through or the iPod we just purchased. The technology is amazing and so is the way it can be put to use in our lives. We won’t see the end to the use of this technology any time soon as it is increasingly gaining popularity. It seems that touch technology is here to stay. And, even if we can’t quite figure out how it all works, we can still think it is cool.
Ipoddownloadsecrets.com