The CRT screen was still the first choice and owned in the 20th era despite being a heavy and bulky dimension. 2. Liquid Crystal Display (LCD) The working mechanism it has is called the twisted nematic effect principle. The special liquid crystal molecules could be aligned depending on two states (Voltage off and voltage on) by the electric field.
Graphite layer on the inner side of the tube. Rubber or silicone gasket where the anode voltage wire enters the tube (anode cup) Cathode. Air-tight glass body of the tube. Screen. Coils in yoke. Control electrode regulating the intensity of the electron beam and thereby the light emitted from the phosphor.
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led tv panel working principle