Touch Screen - by Suma

2,414 views

Published on

Published in: Technology, Business
0 Comments
2 Likes
Statistics
Notes
  • Be the first to comment

No Downloads
Views
Total views
2,414
On SlideShare
0
From Embeds
0
Number of Embeds
2
Actions
Shares
0
Downloads
205
Comments
0
Likes
2
Embeds 0
No embeds

No notes for slide

Touch Screen - by Suma

  1. 1. 1<br />TOUCH SCREEN<br />Presented by<br />SUMA.M.A<br />B.Sc(4th SEM)Emcs<br />1<br />
  2. 2. WHAT IS TO BE EXPLAINED...<br /><ul><li>INTRODUCTION TO THE TECHNOLOGY
  3. 3. HOW IT WORKS ?
  4. 4. TOUCH SCREEN DIVERSITY
  5. 5. CONTROLERS USED
  6. 6. APPLICATIONS
  7. 7. PROS n CONS
  8. 8. CONCLUSION</li></ul>2<br />
  9. 9. 3<br />INTRODUCINGTHETECHNOLOGY<br /><ul><li>A touch screen is an Electronic visual display.
  10. 10. The display screen has a sensitive glass overlay placed on it and we could give the desired input by touching it.
  11. 11. The first touch sensor was developed by “Doctor Sam Hurst” in 1971.
  12. 12. The HP-150 from 1983 was probably the world’s earliest commercial touchscreen computer.</li></li></ul><li>4<br />HOWDOESATOUCHSCREENWORK?<br />Main touch screen components:<br /><ul><li>Touch sensor
  13. 13. Controller
  14. 14. Software driver</li></li></ul><li>5<br />TOUCHSENSOR<br /><ul><li>A touch screen sensor is a clear glass panel with a touch responsive surface which is placed over a display screen so that the responsive area of the panel covers the viewable area of the display screen.</li></li></ul><li>6<br />CONTROLLER<br />The controller is a small PC card.<br />It processes the received signals and sends data to the processor.<br />
  15. 15. 7<br />SOFTWARE DRIVER<br /><ul><li>The driver is a software that allows the touch screen and computer to work together. It tells the operating system how to interpret the touch event information that is sent from the controller.
  16. 16. Most touch screen drivers today are a mouse-emulation type driver. This makes touching the screen the same as clicking your mouse at the same location on the screen.</li></li></ul><li>8<br />
  17. 17. Most Common types Of Touchscreen Technology<br />1. Resistive<br /> 2. Surface acoustic wave <br /> 3. Capacitive<br /> 4. Dispersive signal technology<br /> 5. Acoustic pulse recognition<br />9<br />
  18. 18. 10<br />RESISTIVE<br />Polyester Film .<br />Top Resistive Layer.<br />Conductive Transparent Metal Coating.<br />Bottom Resistive Layer .<br />Insulating Dots .<br />Glass Substrate<br />
  19. 19. 11<br />Polyester film<br />CTMC<br />Top resistive layer<br />Bottom<br />resistive<br />layer<br />Insulating<br />dots<br />Glass<br />substrate<br />
  20. 20. 12<br />Continued…<br /><ul><li> Resistive touch screen monitor is composed of a flexible top layer and a rigid bottom layer separated by insulating dots, attached to a touch screen controller.
  21. 21. The inside surface of each of the two layers is coated with a transparent metal oxide coating
  22. 22. Pressing the flexible top sheet creates electrical contact between the resistive layers, producing a switch closing in the circuit.
  23. 23. The controller gets the alternating voltages between the two layers and converts them into the digital X and Y coordinates of the activated area.</li></li></ul><li>13<br /> VS20UA CONTROLLER<br /><ul><li>Supply Voltage</li></ul> 5.0V  DC <br /><ul><li>Resolution</li></ul>12-bit<br />
  24. 24. 14<br />CAPACITIVE<br /><ul><li>It has a an uniform conductive coating on a glass panel.
  25. 25. During operation, electrodes around the panel's edge evenly distribute a low voltage across the conductive layer & creates an uniform electric field.
  26. 26. A finger touch draws current from each corner.
  27. 27. Then the controller measures the ratio of the current flow from the corners and calculates the touch location</li></li></ul><li>15<br />
  28. 28. <ul><li>Toughbook series by Panasonic
  29. 29. ST series Stylistic tablets from Fujitsu
  30. 30. P series and T series notebooks from Fujitsu
  31. 31. C1 series notebook from LG
  32. 32. Latitude XT series by Dell
  33. 33. TouchSmart PCs from HP (really an All-in-One PC )</li></ul>16<br />Most popular Usage<br />
  34. 34. 17<br />APPLICATIONS..<br /><ul><li>Public Information Displays:</li></ul> Tourism displays, Trade show display<br /><ul><li>Customer Self-Services: Stores, Restaurants, ATMs, Airline ticket terminals and Transportation hubs.
  35. 35. More uses... Digital jukeboxes, Computerized gaming, Student Registration systems, Multimedia software‘s, Scientific applications etc.</li></li></ul><li>18<br />ProsCons<br /><ul><li>Direct pointing to the objects.
  36. 36. Fast
  37. 37. Finger or pen is usable (No cable required)
  38. 38. No keyboard necessary
  39. 39. Suited to: novices, application for information retrieval etc.
  40. 40. Low precision by using finger.
  41. 41. Bit Expensive.
  42. 42. User has to sit or stand closer to the screen
  43. 43. Power Consumption.
  44. 44. Screen gets dirty often.</li></li></ul><li>19<br />CONCLUSION<br /> Though the touch screen technology contains some limitations it’s very user friendly, fast, accurate, easy for the novices & fun to operate. It has been widely accepted. And now by just modifying a little it can replace the mouse and key board completely in near future.<br />
  45. 45. THANK <br />YOU<br />

×