type of display screen that has a touch-sensitive transparent panel covering the
screen. Instead of using a pointing device such as a mouse or light pen, you can
use your finger to point directly to objects on the screen.
screens provide a natural interface for computer novices, they are unsatisfactory
for most applications because the finger is such a relatively large object. It
is impossible to point accurately to small areas of the screen. In addition, most
users find touch screens tiring to the arms after long use.
are typically found on larger displays, in phones with integrated PDA features.
Most are designed to work with either your finger or a special stylus. Tapping
a specific point on the display will activate the virtual button or feature displayed
at that location on the display.Some phones with this feature can also recognize
handwriting written on the screen using a stylus, as a way to quickly input lengthy
or complex information
touchscreen is an input device that allows users to operate a PC by simply touching
the display screen. Touch input is suitable for a wide variety of computing applications.
A touchscreen can be used with most PC systems as easily as other input devices
such as track balls or touch pads. Browse the links below to learn more about
touch input technology and how it can work for you.
Of Touch Screen Technology
A touch screen is a special type of visual
display unit with a screen which is sensitive to pressure or touching. The screen
can detect the position of the point of touch. The design of touch screens is
best for inputting simple choices and the choices are programmable. The device
is very user-friendly since it 'talks' with the user when the user is picking
up choices on the screen.
turns a CRT, flat panel display or flat surface into a dynamic data entry device
that replaces both the keyboard and mouse. In addition to eliminating these separate
data entry devices, touch offers an "intuitive" interface. In public
kiosks, for example, users receive no more instruction than 'touch your selection.
Specific areas of the screen are defined as "buttons" that the operator
selects simply by touching them. One significant advantage to touch screen applications
is that each screen can be customized to reflect only the valid options for each
phase of an operation, greatly reducing the frustration of hunting for the right
key or function.
Pen-based systems, such
as the Palm Pilot® and signature capture systems, also use touch technology
but are not included in this article. The essential difference is that the pressure
levels are set higher for pen-based systems than for touch.Touch
screens come in a wide range of options, from full color VGA and SVGA monitors
designed for highly graphic Windows® or Macintosh® applications to small
monochrome displays designed for keypad replacement and enhancement.
Specific figures on the growth of touch screen technology are hard to come by,
but a 1995 study last year by Venture Development Corporation predicted overall
growth of 17%, with at least 10% in the industrial sector.Other
vendors agree that touch screen technology is becoming more popular because of
its ease-of-use, proven reliability, expanded functionality, and decreasing cost.
A touch screen sensor is a clear glass panel
with a touch responsive surface. The touch sensor/panel is placed over a display
screen so that the responsive area of the panel covers the viewable area of the
video screen. There are several different touch sensor technologies on the market
today, each using a different method to detect touch input. The sensor generally
has an electrical current or signal going through it and touching the screen causes
a voltage or signal change. This voltage change is used to determine the location
of the touch to the screen.
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