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Tft Monitor


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Tft Monitor

  1. 1. Thin film transistor
  2. 2. Introduction <ul><li>A TFT monitor uses thin-film transistor technology for the ultimate LCD display. </li></ul><ul><li>It replaces the old style cathode ray tubes (CRTs). </li></ul>
  3. 3. Semiconductor <ul><li>The first TFT for LCD was made of Cd-Se semiconductor thin films, Though it has a better performance, its commercialization is still not success. </li></ul><ul><li>TFTs can be formed by three different silicons, they are: crystalline silicon, poly-silicon and amorphous silicon . </li></ul>
  4. 4. Mechanism
  5. 5. Types <ul><li>P-channel TFT: </li></ul><ul><li>switched ON- ‘-’voltage on the gate, </li></ul><ul><li>switched OFF- ‘+’ voltage on the gate. </li></ul><ul><li>N-channel TFT </li></ul><ul><li>switched ON- ‘+’voltage on the gate, </li></ul><ul><li>switched OFF- ‘-’ voltage on the gate. </li></ul>
  6. 6. Benefits <ul><li>Less current compared to CRT. </li></ul><ul><li>This allows for very fast re-drawing of the display, as the image is re-painted or refreshed several times per second </li></ul>
  7. 7. <ul><li>Thank you </li></ul>