Lectures
OLED (organic light emitting diode)
  Each pixel is an organic (chemical) light emitting diode.

  Used in cell-phones, pads, mp3 players, hand-held games, etc.  
 
  + No need for back-lighting. Cell phones, etc.
  + Can be "printed" on any surface including flexible surfaces.
  + Easy to print high resolution screens even on tiny devices.
  + Better viewing angle than LCD
  +/- Average power consumption better than LCD because only emitting 
    pixel draws power. 
  - Displaying a lot of light colored images draws more power, up to 2x lcd.
  + Extremely high refresh rates. 100x LCD
  - Different colors use different chemicals, don't degrade or 
    function evenly. Blue especially problematic.
  - Current costs high, especially on larger display but costs
     should come down as manufacturing processes improve.
  - Very susceptible to water damage.
  - Requires additional technology to make screen easy to view outside.

Comparison of CRT, LCD, Plasma, OLED