05-12-2012, 12:24 PM
TOUCHSCREEN TECHNOLOGY
[attachment=42577]
INTRODUCTION
A touchscreen is a display that can detect the presence and location of a
touch within the display area.
The term generally refers to touch or contact to the display of the device by
a finger or hand.
Touchscreen can also sense other passive objects, such as a stylus.
History
Touchscreens emerged from academic and corporate research labs in the second half of the 1960s.
One of the first places where they gained some visibility was in the terminal of a computer-assisted learning terminal that came out in 1972 as part of the PLATO project.
The HP-150 from 1983 was probably the world's earliest commercial touchscreen computer.
It doesn't actually have a touchscreen in the strict sense, but a 9" Sony CRT surrounded by infrared transmitters and receivers which detect the position of any non-transparent object on the screen.
Development
The development of multipoint touchscreen facilitated the tracking of more than one finger on the screen, thus operations that require more than one finger are possible.
These devices also allow multiple users to interact with the touchscreen simultaneously.
With the influence of the multi-touch-enabled iPhone and the Nintendo DS, the touchscreen market for mobile devices produced 5 billion in 2009.
CONTROLLER
The controller is small PC card that connects between the touch sensor and PC.
It takes information from the touch sensor and translate in to information that PC can understand.
SOFTWARE DRIVER
The driver is a software that allows the touch screen and computer to work together.
It tells the operating system how to interpret the touch event information that sent from the controller.
Most of the touch screen drivers today are mouse emulation type driver .
Construction
There are several principal ways to build a touchscreen:
In the most popular techniques, the capacitive or resistive approach, manufactures coat the screen with a thin, transparent metallic layer.
When a user touches the surface, the system records the change in the electrical current that flows through the display.
Dispersive-signal technology which 3M created in 2002, measures the piezoelectric effect — the voltage generated when mechanical force is applied to a material — that occurs chemically when a strengthened glass substrate is touched.
Conclusion:
Designers are trying to use touchscreen to simplify input commands for largely unsophisticated computer users.
Today, a larger share of population is PC literate, yet the touchscreen has become adopted by computer users of all abilities because it is simple, fast, and innovative.
In future there is no usage of mouse and keyboards as they will be replaced by touchscreens.
[attachment=42577]
INTRODUCTION
A touchscreen is a display that can detect the presence and location of a
touch within the display area.
The term generally refers to touch or contact to the display of the device by
a finger or hand.
Touchscreen can also sense other passive objects, such as a stylus.
History
Touchscreens emerged from academic and corporate research labs in the second half of the 1960s.
One of the first places where they gained some visibility was in the terminal of a computer-assisted learning terminal that came out in 1972 as part of the PLATO project.
The HP-150 from 1983 was probably the world's earliest commercial touchscreen computer.
It doesn't actually have a touchscreen in the strict sense, but a 9" Sony CRT surrounded by infrared transmitters and receivers which detect the position of any non-transparent object on the screen.
Development
The development of multipoint touchscreen facilitated the tracking of more than one finger on the screen, thus operations that require more than one finger are possible.
These devices also allow multiple users to interact with the touchscreen simultaneously.
With the influence of the multi-touch-enabled iPhone and the Nintendo DS, the touchscreen market for mobile devices produced 5 billion in 2009.
CONTROLLER
The controller is small PC card that connects between the touch sensor and PC.
It takes information from the touch sensor and translate in to information that PC can understand.
SOFTWARE DRIVER
The driver is a software that allows the touch screen and computer to work together.
It tells the operating system how to interpret the touch event information that sent from the controller.
Most of the touch screen drivers today are mouse emulation type driver .
Construction
There are several principal ways to build a touchscreen:
In the most popular techniques, the capacitive or resistive approach, manufactures coat the screen with a thin, transparent metallic layer.
When a user touches the surface, the system records the change in the electrical current that flows through the display.
Dispersive-signal technology which 3M created in 2002, measures the piezoelectric effect — the voltage generated when mechanical force is applied to a material — that occurs chemically when a strengthened glass substrate is touched.
Conclusion:
Designers are trying to use touchscreen to simplify input commands for largely unsophisticated computer users.
Today, a larger share of population is PC literate, yet the touchscreen has become adopted by computer users of all abilities because it is simple, fast, and innovative.
In future there is no usage of mouse and keyboards as they will be replaced by touchscreens.