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TOUCH SCREEN. What is Touch Screen ?.
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What is Touch Screen ? • A Touchscreen is a display which can detect the location of touches within the display area. This allows the display to be used as an input device, removing the keyboard and/or the mouse as the primary input device for interacting with the display's content. Such displays can be attached to computers or, as terminals, to networks. Touchscreens also have assisted in recent changes in the design of personal digital assistant (PDA), satellite navigation and mobile phone devices, making these devices more usable.
Basic Components Used. • 1. Touch Sensor ( Glass panel covers screen) • 2. Controller (IC Interconnects PC to sensor) • 3. Driver (Software)
Touchscreens As Input Device • All of the touchscreens that we offer basically work like a mouse. Once the software driver for the touchscreen is installed, the touchscreen emulates mouse functions. Touching the screen is basically the same as clicking your mouse at the same point at the screen. When you touch the touchscreen, the mouse cursor will move to that point and make a mouse click. You can tap the screen twice to perform a double-click, and you can also drag your finger across the touchscreen to perform drag-and-drops. The touchscreens will normally emulate left mouse clicks. Through software, you can also switch the touchscreen to perform right mouse clicks instead.
Polyester Film Upper Resistive Circuit Layer Conductive ITO (Transparent Metal Coating) Lower Resistive Circuit Layer Insulating Dots Glass/Acrylic Substrate Touching the overlay surface causes the (2) Upper Resistive Circuit Layer to contact the (4) Lower Resistive Circuit Layer, producing a circuit switch from the activated area. The touchscreen controller gets the alternating voltages between the (7) two circuit layers and converts them into the digital X and Y coordinates of the activated area General Composition :
There are a number of types of touch screen technology: • 1.Resistive : • 2.surface acoustic wave(Ultrasonic waves): • 3.Capacitive: • 4.Infrared: • 5.Stain Guage(springs): • 6.Optical ImagingInfrared Back lights & cameras):
What Are Touchscreens Used For? • Public Information Displays. • Retail and Restaurant Systems • Costomer Self Service. • Control & Automation Systems. • Computer Based Training • Assistive Technology
As we all knows today’s smartest phone is i-phone which is working on touchscreen which is next generation phone. Also Microsoft surface is best example for it today we all r familiar with it. Which is going to be next generation computing technique. Future Aspects !!
Draw Backs …. • Not Used Much Where more need of typing documents as well more written office work. • Costly in compare to mouse & key boards. • Need more care while handling . • It is not portable.