Touch Screen Technology
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Introduction: - Touchscreen phones are becoming a part of our lives more and more each day. This is due to the fact that the touchscreen control method allows a device to be navigated much more easily, quickly and intuitively, since you
can activate given applications by touch, rather than having to press a button multiple times (e.g. the D-pad). There are a few different types of technology that can be used to achieve this control method, each of them having its pros and cons.
The beginning:- The father of the touchscreen technology is Dr. Samuel Hurst. In 1971,
while he was working as an instructor at the University of Kentucky Research Foundation, he had to read a great volume of information during the graduation exams and it took whole two
months so that two students could graduate. In an effort to save some time he invented the first touch sensor tha the called „Š•lograph” (electronic graphics), which allow
ed him to enter data faster. Alongside with this invention the company „Elographics” was born (known today as Elo TouchSystems). This device was not transparent as today’s sensors are, but this achievement was a big move towards the modern touchscreen. Three years later, in 1974, Dr. Hurst designed the first transparent touchscreen, and in 1977 Elographics invented and patented the 5-wire resistive technical method, which is still the most widely used one today.
Touch Screen Phones:-
Touch-screen technology for mobile phones is generating considerable interest from consumers, and it is starting to grow significantly. By the end of 2007, momentum will be very strong for the technology, and by 2012, 40 percent of all mobile phones will likely utilize touch-screen technology.
"The touch screen market in cell phones is nearly ready to take off, but before it can do so, certain conditions must be met," said Stuart Robinson, director of the handset component technologies service at Strategy Analytics, the Boston-based research service.
Lower Costs, Higher Demand:-
First, Robinson said, the cost of touch screen technology must shrink from its current price of US$5 to $10, to under $3. Then, Robinson said, revenue-generating applications must be developed to differentiate touch screen devices from menu or icon driven phones. "Finally, the market requires a catalyst, such as th
e presence of an iconic touch screen phone in a Hollywood blockbuster, to generate demand," said Robinson.
These touch screen interfaces for mobile phones will remain at under 2 percent of total devices until such a catalytic event occurs, most likely at the end of next year. Once that happens, fast growth will generate interest in touch s
creen phones, growing the market to around 40 percent.
"We expect most demand to come from finger-sensitive technology built into high-end feature phones," said Stephen Entwistle, vice president of Strategy Analytics. "This will be a significant shift from today's wireless PDA segment, where most stylus-driven touch screen devices can be found.
Stephen Entwistle, Vice President of the Strategy Analytics Strategic Technologies Practice, adds, "We expect most demand to come from finger-sensitive technology built into high-end feature phones. This will be a significant shift from today's wireless PDA segment, where most stylus-driven touch screen devices can be found."
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so available in touch screen. Sigmatel touch screen mobiles are very low in prices, gentle in shape and attractive in looks. There are about 3 to 4 mobile models in sigmatel. 
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