PPT on ”Transparent Technology” .
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PPT on ”Transparent Technology” www.engineersportal.in
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Transcript of PPT on ”Transparent Technology” .
PPT on
”Transparent Technology”
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Overview
IntroductionHistoryComponentsTechnologiesPros & consApplicationsConclusion
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IntroductionA touch screen is a display that can detect the
presence and location of a touch within the display area.
Touch screen can also sense other passive objects such as stylus and finger.
The display screen has a sensitive glass overlay placed on it and we can give the desired input by touching on it.
Touch screen technology is becoming a part of our everyday lives now.
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History In 1971 Dr. Sam Hurst, founder of Elographics
developed the first touch opaque sensor “Elograph” at the University of Kentucky.
In 1974 he developed the first real touch screen. In 1977, Elographics developed the five-wire
resistive technology then with the backing of Siemens Corporation, developed a curved glass sensor called the touch screen.
The new transparent technology, Accu Touch, was later developed by the founders of Elographics, Dr. Hurst and Bill Colwell
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Components
A basic touch screen has three main components :
1. Touch Sensor
2. Controller
3. Software Driver
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Touch sensor
A touch screen sensor is a clear glass panel with a touch responsive area.
The touch sensor is placed over a display screen so that the responsive area of the panel covers the viewable area of the screen.
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ControllerThe controller connects between the touch
sensor and the processor.Take information from the touch sensor and
translate it into information that processor can understand.
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Software DriverThe driver allow the touch screen and
computer to work togetherThis makes touching the screen as same as
clicking the your mouse at the same location on the screen.
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Diagram showing How it Works
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TechnologiesResistiveSurface acoustic waveCapacitiveInfraredOptical Imaging
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Resistive
Two layers of conductive material Touch creates contact between resistive
layers completing circuit Voltage in circuit changes based on
position Controller determines location based on
voltages When an object, such as a finger, presses
down on a point on the panel's outer surface the two metallic layers become connected at that point. This causes a change in the electrical current, which is registered as a touch event and sent to the controller for processing.
It is used in Grocery Stores, Hotels, Restaurants and Retail Stores etc.
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Capacitive
A capacitive touch screen panel consists of an insulator such as glass, coated with a transparent conductor such as indium tin oxide (ITO).
As the human body is also a conductor, touching the surface of the screen results in a distortion of the body's electrostatic field, measurable as a change in capacitance.
Small amount of voltage applied to four corners of touch screen
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Surface Acoustic Wave Touch Screens
Surface consists of glass overlay with transmitting and receiving transducers
Electrical signals sent to the transmitting transducers converts to ultrasonic waves
Waves are directed across screen by reflectors then directed to receiving transducers
When finger touches screen it absorbs waves
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Resistive Infrared SAW Capacitive
Touch Resolution High High Average High
Clarity Average Good Good Good
Operation Finger or Stylus Finger or Stylus Finger or Soft-tipped Stylus
Finger only
Durability Can be Damaged by Sharp Objects
Highly Durable Susceptible to Dirt and Moisture
Highly durable
Touch Screen Technology Comparison Chart
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Pros & Cons
Direct pointing to the objects
Fast response Finger or pen is usable (No
cable required) No keyboard necessary Suited to: novices,
application for information retrieval etc
Low precision by using finger
User has to sit or stand closer to the screen
The screen may be covered more by using hand
No direct activation to the selected function
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ApplicationsAtmAirport terminal passenger internet and email
systemsSmart Phones, IpadGrocery StoresMuseumsCorporate Information Digital Camera
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Corning Gorilla Glass Visually stunning, lightweight, and highly
damage-resistant, Corning Gorilla Glass is changing the way the world thinks about glass. It helps protect the world’s coolest Smartphone's, Tablets, PCs, and TVs from everyday wear and tear.
Many mobile manufacturing companies demand these type of glasses.
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Features and Applications
Stylish: Thin and Light, Seamless design High performance High resolution Fast response time 3D Cost efficient Anti-glare Environment friendly Low power consumption Superior picture quality
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Conclusion
Touch screens, touch panels or touch screen panels are display overlays which have the ability to display and receive information on the same screen.
In future there is no usage of mouse and keyboards as they will be replaced by touch screen
Designers are trying to use touch screen to simplify input commands for largely unsophisticated computer users.
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References http://www.en.wikipedia.org/wiki/Smart_glass http://www.en.wikipedia.org/wiki/touch http://www.alibaba.com/showroom/glass-technoloy.
html www.touchscreensolutions.com.au D. Chen, H. Miyoshi, T. Akai, and T. Yazawa,
“Colourless transparent fluorescence material: Sintered porous glass containing rare-earth and transition-metal ions,” Appl. Phys. Lett., vol. 86, no. 23, pp. 231908–1, Jun. 2005.
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