History Of Touch Screen Technology
1971, the first "touch sensor" was developed by Doctor Sam Hurst (founder of Elographics) while he was an instructor at the University of Kentucky
1974, the first true touch screen incorporating a transparent surface was developed by Sam Hurst and Elographics.
1983: Hewlett-Packard's HP-150 was one of the first comercially available touchscreen PCs. A grid of infrared beams across the front of the monitor detected finger movements. The IR sensors would often become clogged with dust and require cleaning
1993: Long before the iPad, Apple led the way in handheld computing with its Newton PDA. Featuring handwriting recognition, it is widely regarded as having been ahead of its time. Used models still sell for a high price on internet auction site
1993: The first ever smartphone. IBM's Simon featured a calendar, note pad, and fax function. Users were able to input phone numbers using a touchscreen interface.
1996: Palm dominated the touchscreen PDA market for almost a decade with its Pilot series. The company moved into smartphones, ditching its own operating system in favour of Windows Mobile. Its latest handheld, the Palm Pre, uses the Linux-based WebOS.
2000: Microsoft founder Bill Gates saw the potential of handheld 'tablet' devices. The company launched Windows XP Tablet edition in 2002. Relatively few people bought tablet PCs, mainly because of the high price of the hardware.
2004: Touchscreen smartphones grew in popularity during the 2000s. Nokia's Symbian handsets, Windows Mobile, and SonyEricsson's UIQ phones all helped move the technology forward.
2007: Apple's iPhone shook-up the smartphone industry. The first model lacked many common features, including 3G and video recording. However its slick user interface and App Store left other manufacturers playing catch-up.
2008: More for commercial than home use. Microsoft's touch-controlled table computer costs Â£8,500. The system allows many users to interact at the same time. Microsoft introduced multi-touch for home PCs with the launch of Windows 7 in 2009.
2010: Critics described the iPad as 'just a big iPhone'. Many were disappointed by the lack of a camera and multi-tasking facility. In the US, the iPad sold 1 million units within a month of its launch.
How the Touch Screen Techonlogy Works in Your Devices-I-Phone or I-Pad
In Recent time one of the most important inventions is "touch-screen" technology. Now day touch-screen is utilized on everything from laptop computers, Ipads, GPS units, MP3 players, digital cameras, and even printers, most anyone would agree that Apple's iPhone was the device most instrumental in bringing touch-screen technology to the masses. However, it's a safe bet that most of us have no idea how the technology in an iPhone's touch-screen or in ipad actually works.
ABC about Touchscreen
A touchscreen system is consists of three main components: a touch sensor, a controller, and a software driver. The touchscreen is an input device, so it needs to be combined with a display and a PC or other device to make a complete touch input system.
1. Touch Sensor
This 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.
2. Software Driver
The driver is software for the PC system that allows the touchscreen and computer to work together. It tells the computer's operating system how to interpret the touch event information that is sent from the controller. Most touch screen drivers today are a mouse-copy type driver. This makes touching the screen the same as clicking your mouse at the same location on the screen. This allows the touchscreen to work with existing software and allows new applications to be developed without the need for touchscreen specific programming. Some equipment such as thin client terminals, DVD players, and specialized computer systems either do not use software drivers or they have their own built-in touch screen driver.
The controller is a small PC card that connects between the touch sensor and the PC. It takes information from the touch sensor and translates it into information that PC can understand. The controller is usually installed inside the monitor for integrated monitors or it is housed in a plastic case for external touch add-ons/overlays. The controller determines what type of interface/connection you will need on the PC. Integrated touch monitors will have an extra cable connection on the back for the touchscreen. Controllers are available that can connect to a Serial/COM port (PC) or to a USB port (PC or Macintosh). Specialized controllers are also available that work with DVD players and other devices.
In all reality, the basic idea is in using touch screen is very simple: when we place our finger or a stylus on the touch screen, it changes the state that the device is monitoring. In screens that rely on sound or light waves, your finger physically blocks or reflects some of the waves. Capacitive touch-screens use a layer of capacitive material to hold an electrical charge; touching the screen changes the amount of charge at a specific point of contact. In resistive screens, the pressure from your finger causes conductive and resistive layers of circuitry to touch each other, changing the circuits' resistance.
Here you will see how i-phone Touch screen works:
1.) Signals travel from the touch screen to the processor as electrical impulses.
2.) The processor uses software to analyze the data and determine the features of each touch. This includes size, shape and location of the affected area on the screen. If necessary, the processor arranges touches with similar features into groups. If you move your finger, the processor calculates the difference between the starting point and ending point of your touch.
3.) The processor uses its gesture-interpretation software to determine which gesture you made. It combines your physical movement with information about which application you were using and what the application was doing when you touched the screen.
4.) The processor relays your instructions to the program in use. If necessary, it also sends commands to the iPhone's screen and other hardware. If the raw data doesn't match any applicable gestures or commands, the iPhone disregards it as an extraneous touch.