After exiting the markets Apple iPhone began to appear more and more devices with touchscreens. How is it constructed sensitive displays? Probably very few people know about it, but touch screens have appeared long ago. The first samples were invented back in the 60s of last century. In 1972, U.S. scientists have created a computing machine, equipped with a plasma touch screen, called PLATO IV. At the heart of modern touch-screen driven by different technology.
It will be given a general summary of the main ones. Capacitive touch screens These screens regardless of their high cost and complexity of construction, began gaining popularity, in part it due to their high transparency, color saturation and durability of the screen. Some of this type of touch screen technology support Multitouch, while the technology of electro-conductivity, and so that management can be performed only with the fingers or conductive stylus. Resistive screens Much of today's touch screens are made on the basis of the principle of resistance (this technology has some production costs). Speaking about the advantages of these types of screens, I must say that they are well protected from dirt, operated with the fingers or an ordinary stylus. K Disadvantages include a low light transmission, low angle. Screens of this type do not last, did not differ in impact resistance, and everything else they do not have the opportunity to realize the technology Multitouch. Such displays are used in PDAs, various navigators, as well as on a gaming console Nintendo DS.
Infrared touch screens These screens do without sensitive coating. Integrated into the frame around the display LEDs, creating over screen surface field in the infrared range, hit in the field of any non-transparent object immediately fixed sensors. If you do not talk about the expensive infrared displays, it should be noted that they have good light transmission, but not very accurately determine the coordinates of depression, which complicates management. Optical touch screens full name of this technology sounds so – FTIR (Frustrated Total Internal Reflection) – broken total internal reflection. The mechanism of its operation is as follows: the user, when you touch changes the direction of light rays, which in turn is fixed sensors. These screens allow you to apply technology Multitouch, and to they are sensitive to the force pressing. Analysts claim that this technology FTIR in the future will create a sufficiently large touch screens. Windows7: Multitouch technology in every PC "The future for touch screens" – Even if a giant like Microsoft thinks that way, certainly in this that it is. The company's specialists believe that soon will add a bunch of touch screen "keyboard mouse", and perhaps even replace it altogether. Release of a new Windows 7 will also be instrumental in breaking the field of data management through the OS, Multitouch will be available to each user. Futuresight.ru – Technology of the Future Today