In today’s world there are revolutionary changes in computer world and the revolution comes with the introduction of touch screen technology. In short touch-screen changed the concept of hard-press to soft-press which gives a lot of ease to the end user.
With the introduction of touch screen you can tap your finger in button of viewing window of computer with less effort .The touch key board in tablet PC input panel is very easy to use and in one touch you can manage and access all program and files .The common task will be more easier by the new gestures .Now you can easily enter into the text on a touch screen without using a physical keyboard, by updated touch keyboard in tablet PC input panel. Touch screen is an electronic visual display which can detect the presence of your touch. It is very sensitive and it helps users to interact with computers with one soft touch .There are three basic systems to recognize a person’s touch:
1. RESISTIVE
2. SURFACE ACOUSTIC WAVE
3. CAPACITIVE
In resistive system a normal glass panel is covered with a conductive and a metallic layer of resistive. By spacers the two layers are separated from each other and the whole set up covered by a scratch resistant layer on the top so when users touches the screen the two layers make contact with each other with that exact spot and the change in electrical field is recorded and this coordination is calculated by the computer.
In surface acoustic system two sensors (one transmitter and one receiver) are placed with the horizontal and vertical axis of the monitor’s glass plate. If the wave has been disturbed, the receiving sensor will be able to detect and accordingly locate it .It do not leave any metallic layers on the screen and produce an absolute perfect picture quality. This makes the surface acoustic wave system best for displaying graphics.
In capacitive system a glass panel is placed with a layer of stored electrical charges and some of the charge is transferred to the users when he or she touches the monitor so charge of the capacitive layer decreases in the monitor where circuits located in each corner of the monitor measures the decrease of the charge.
This type of technology is obviously very beneficial as in this technology you don’t have to input any extra device such as mouse or a key board. the user only need his or her finger to manipulate the chosen device so the possibilities with touch screen monitors are endless .Touch screen computers are commonly used in medical field , stores ,industrial applications , cell phones , ATM machines etc. Touch screen technology used in I Phone has provided user a new leap in using various applications in a single touch.
The touch screen computer’s best feature is the ease of selection without use of mouse to scroll and select .A touch screen computer users can click on music files or photos with a swipe of their finger on the computer screen. So at last we can say that if computer makes mans life easy touch screen made it even easier and effortless.
