Thin Film Transistor

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Thin Film Transistor

  1. 1. T HIN F ILM T RANSISTOR A small discussion
  2. 2. <ul><li>TFT is made by depositing thin films on semiconductor. </li></ul><ul><li>A common substrate is glass since the primary application of TFT’s are Liquid Crystal Displays. </li></ul><ul><li>Silicon </li></ul>
  3. 3. WHAT IS TFT LCD ? <ul><li>TFT LCD is a sandwich like structure with crystal filled between two glass plates. </li></ul><ul><li>It is common in notebook computers , that it has transistor for each pixel. </li></ul>
  4. 4. ADVANTAGES <ul><li>Light weight </li></ul><ul><li>Portable </li></ul><ul><li>Rugged </li></ul><ul><li>Low power consumption </li></ul><ul><li>High resolution </li></ul><ul><li>Wide variety of commercial application </li></ul>
  5. 5. HOW DO THEY WORK ? <ul><li>A display is composed of matrix of picture elements . </li></ul><ul><li>Millions of pixels create an image on the display. </li></ul><ul><li>TFT’s act as switches to individually turn ‘on’ and ‘off’ for each pixel. </li></ul><ul><li>Active elements </li></ul>
  6. 6. DISADVANTGES <ul><li>The general comment from the people is that the LCD TFT gets switched off after sometime . </li></ul><ul><li>The liquid crystals inside the display are poisonous </li></ul><ul><li>Spills off from a cracked display should be washed with soapwater. </li></ul>
  7. 7. ASUSUAL……….. <ul><li>OPEN HOUSE </li></ul>

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