Touch screen technology is the neccessary for business's of all kind, take restaurants for example. Touch screen's make it extremely easy for one to quickly press what they want. Movie tickets for example are easier and faster to buy from a touch screen machine, then waiting in line for the teller.
There are three main types of touch screen's. The first is resistive, which is a normal screen coated in a thin metallic layer. When pressed it causes a change in the electrical current, and a signal is sent to the controller for processing. Resistive touch screens are not the best quality of the three.
The second type of touch screen is surface wave, which uses ultrasonic waves to detect a touch. When touched, the a portion of the wave is absorbed, and a singal with a location is sent to a controller. This type of touch screen is the most advanced.
The third type is a capacitive touch screen. A capacitive touch screen has a continuous electrical current which is altered when touched by a human finger. The human finger touches the screen, the electrons disturb the current, and an signal is sent to the controller for processing.
Definition of Touch Screens
A touch screen is, "a screen that is quite sensitive to the touch of
a finger. A touch screen is widely used on ATM machines, retail point-of-sale
terminals, car navigation systems, medical monitors and industrial control
panels, the touch screen became wildly popular on handhelds after Apple introduced
the iPhone in 2007."
The touch screen is one of the easiest to use and
most immediate of all computer interfaces, a touch screen allows users to navigate
a computer system by touching
icons or links on the screen.
The Apple touch-screen iPhone has grabbed a huge
piece of the phone market for smart phones in something less than two years.
And the iPod
player continues the same road and shows real potential for other pocket-sized
Touch screens work best for software where you have very few options to choose
from and have a clean interface. Some examples include telephones, ATMs
or on other portable devices with little
for larger numbers of buttons. "Maximizing screen space is a huge win
for a mobile device," Nielsen says. "A lot of the downsides for a
touch screen are not as severe for that application."
You have been warned that touch screens may not be for your cup of cake.
It sure can be troublesome to type on a touch screen and touch screens
graphic design where pixel-perfect control is necessary. "The touch screen
is limited by the size of the finger," Nielsen says. "Another downside
is the the display has a hard time understanding where are pointing."
as companies such as Apple build a rich vocabulary of indications for operating
touch-screen interfaces, it will be harder to convert from
one device to another. While simple indications, such as pointing, will be
universal on all devices, more advanced techniques, such as zooming in on an
be the same for every touch screen phone.
So the differences in touch screendevices, such as the iPhone
and HTC's Touch will only grow larger as they advance to read full-body signals
as well. "The
real problem here is that different people will come up with different touch
screen techniques," Nielsen
Such limitations mean touch screens and indication interfaces won't work
in every touch screen phone. But Nielsen sees them as logical for devices such
as remote controls, which
already cram too many buttons into too little space.
How the Touch Screen technology works
Here are three basic elements used in touch screen technology:
First of all
you should know that the touch sensor is a screen panel with a touch sensitive
exterior surface. Several Touch Screen systems are built
based on different types of sensors:
immune touch screen sensors,
Infrared touch screen sensors, where the LEDs glow infrared light in front
of the touch screen. If you touch the touch screen
at some point, basically you interrupt two or more beams.
acoustic wave touch screen sensors are used when you touch the touch screen,
you interrupt the sound beams and absorb some of the sound beams energy.
Near field imaging (NFI) touchscreen sensors work as following: As you move
your finger close to the touch screen, you modify the electric field on the
glass touch screen, which
instantly senses your touch.
sensors which is used in most smart phones.
However, general touch screen sensors have an electrical
through them and touching
the touch screen causes
a voltage change. This voltage change identifies the touching location and
thats basically how a touch screen works.
The controller, is the hardware that converts the voltage changes on the
sensor into signals the computer or other device can receive.
Software tells the smartphone, or in some cases the game device, etc, what's
going on with the sensor and the information coming from the controller.
Everything about who's touching
what and where on the touch screen. Later, the touch screen allows the computer
or smart phone to react appropriately.
We have to state that the touch screen
technology works in combination with a computer, smart phone, or other type
Light pens are an old manifestation of touchscreen technology, and its
fair to say that they worked in a completely different way than modern touchscreens.
In the big and old computer
the picture shown was basically drawn by an electron beam that scanned back
and forth, just like in a cathode-ray tube television. The light pen incorporated
that detected the electron beam as it passed by, sending a signal to the computer
down a cable. Since the computer knew exactly where the electron beam was at
any moment, it could figure out where the pen was pointing. Light pens were
used to select items from the screen interface or acting like a mouse and
selecting text from a screen or were used to draw
What's makes touch screens so different and good ?
The best thing about touchscreen technology is that it's astonishingly handy
for most people to use. Touchscreens can display just as much information fast
and instantly thus helping people finish otherwise difficult processes making
it a very easy and plain simple process along the way. And that's
screen ticket machines at railroad stations, touch
screen ATMS, electronic voting touch
screen machines, touch
screen self-servcie grocery checkouts, touch
screen military computers, and many
computers with screens and keyboards would be too problematic to use.
touch screens are vastly used basically in outdoor applications, such
screen ticket machines at tran stations. Customers like touch
since you can buy your train ticket more quickly without waiting in line using
screen technology. They're
also very economical for the station operator, since touch screen machines
cost less than a ticket sales person.
Many people nowadays have bought the
latest touch phones, which have multi-touch screens. The big benefit here is
that the display can show you a screen scaledd
to the task you want to perform with the touch screen. For example if you want
to call someone, the touch screen will show the classic digits 0-9 so you
can dial the number. If you
an SMS text message through a touch screen , the touch screen will show a
keyboard (like the one of a computer).
prefer to play
touch screen can change do all the above we mentioned. Touchscreen displays
like this are incredibly multifaceted: minute by minute, touch screens change
to meet your needs and desires.
So far, we've had fairly small introduction
to touchscreens—but that's a subject that's about to change. Microsoft has
anounced that future versions
of its Windows
operating system will feature touchscreen technologies—potentially making the
infamous computer mouse no longer needed. Though it could be a while before
we're all prodding and poking
our computers into action, touchscreen technology is certainly something to
watch out for!
Touch Screen tags:
Touch Sensitive Screens
Touch-sensitive screens may seem like a new technology but really, they
are not. In
universe they first originated on personal digital assistants back in the
90's and then
Apple iPhone instead of keyboard. While the Apple iPhone still has a number
of benefits, a chief executive officer of Motorola stated that in the
Motorola products and phones will use multi-touch screens instead of keypads.
think you will see us deliver multi-touch in the majority of our devices
going forward. There’s a complex set of factors, not all of them technical.
But I think you will see us being proactive on multi-touch because the
feedback on multi-touch is very good,” stated Sanjay Jha, the chief executive
officer of Motorola, in an interview he gave in Laptop Magazine.
screens permit mobile phone makers to construct models with large screens
without augmenting the size of handsets on general. Since more
more users use their phones not only for calling others, but also for
Internet surfing, playing games or watching videos, large screens become
to pinpoint such
Nonetheless, hardware keyboards allow users to utilize their phones
without even looking at keys, an important characteristic for those who
afflictions. Moreover, phones with keypads are commonly better for usage
in idyllic areas
or extraordinary conditions.
Mainly, phones with touch-sensitive screens do
not feature keyboards and from that iit can be comprehended that most
of the future Motorola phones will
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