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How Does Your TV Work?

How Does Your TV Work?. A brief introduction. Two Amazing Things about the Brain. Connecting the dots Pixels and resolution Connecting the frames 15 frames per second. The Cathode Ray Tube. Anode and Cathode and Ray Phosphor. Steering Coils. Steering Coils.

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How Does Your TV Work?

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  1. How Does Your TV Work? A brief introduction.

  2. Two Amazing Thingsabout the Brain • Connecting the dots • Pixels and resolution • Connecting the frames • 15 frames per second

  3. The Cathode Ray Tube • Anode and Cathode and Ray • Phosphor

  4. Steering Coils

  5. Steering Coils

  6. The Black-and-WhiteTV Signal • Raster scan • Horizontal retrace • Vertical retrace • Interlacing • Progressive scanning

  7. Thus, a “composite video signal” contains: • Intensity information • Horizontal retrace • Vertical retrace

  8. Composite Video Signal

  9. Adding Color • Changes from Black and White • 3 electron beams • Screen coating • Shadow mask

  10. Shadow Mask

  11. Chrominance Signal/Color Burst

  12. Liquid Crystal Display (LCD) • Necessary physical facts: • Light can be polarized. • Liquid crystals can transmit and change polarized light. • The structure of liquid crystals can be changed by electric current. • There are transparent substances that can conduct electricity.

  13. LCD Tech • On • Off

  14. LCD Types • Backlit vs. Reflective • Common-plane-based • Passive-matrix • Active-matrix

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