JMM 102 Lecture Notes - Lecture 17: Low-Power Broadcasting, 480P, Video Codec
4 Apr 2017
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Document Summary
Lcd: liquid crystal display: when a tiny transistor delivers an electrical charge to the pixel, the liquid crystal molecules twist, allowing light to pass to the front surface of the display. Lcd sets use a florescent backlight: led are lcd sets that use light-emitting diodes for backlight or sidelight, oled use a special kind of organic ink rather than liquid crystals very expensive! Led: led backlighting enjoys a number of advantages over lcd panels using cold- cathode fluorescent lamps (ccfl), with the most significant being: Improved picture performance that is similar to crts and plasma tvs when it comes to displaying deep blacks thanks to their impressive dynamic contrast ratings. Longer life that is typical twice that of ccfl based models: local dimming led backlight technology can achieve superior contrast performance to any other lcd backlight in use today. Picture aspect ratio: ratio of the screen width to its height.
