TOUCH SCREEN

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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.

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Basic Components Used.

• 1. Touch Sensor ( Glass panel covers screen)
• 2. Controller (IC Interconnects PC to sensor)
• 3. Driver (Software)

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• 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.

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General Composition

1. Polyester Film
2. Upper Resistive Circuit Layer
3. Conductive ITO (Transparent Metal Coating)
4. Lower Resistive Circuit Layer
5. Insulating Dots
6. Glass/Acrylic Substrate
7. 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.
8. 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

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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)

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What Are Touchscreens Used For? 

• Public Information Displays.
• Retail and Restaurant Systems
• Costomer Self Service.
• Control Automation Systems.
• Computer Based Training
• Assistive Technology

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Future Aspects !!

• As we all knows todays 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.

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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.

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Query Please !!