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Television technologies - Coggle Diagram
Television technologies
Cathode Ray Tube (CRT) TVs
Vacuum tube containing one or more electron guns, the beams of which are manipulated to display images on a phosphorescent screen
CRTs can emit a small amount of X-ray radiation
The body of a CRT is usually made up of three parts: A screen/faceplate/panel
CRTs are very heavy, because of the glass its about
65% of its weight
Plasma TVs
(PDP
Ionized gas that responds to electric fields
Plasma displays are bright
(1000 lux or brighter)
Have a wide color gamut
Can be produced in fairly large sizes—up to 3.8 metres (150 in) diagonally
Discontinued and being replaced mostly by LCDs and OLEDs
Liquid Crystal Displays (LCD) TVs
Electronically modulated optical device that uses the light-modulating properties of liquid crystals combined with polarizers
Slowly being replaced by OLEDs because of their superior colour gamut and response time
Lower power consumption
Cheaper to make
Most color LCD systems use the same technique, with color filters used to generate red, green, and blue subpixels
Since LCDs produce no light of their own, they require external light to produce a visible image
Organic Light-Emitting Diode TVs
Oorganic compound that emits light in response to an electric current
OLED devices for use in solid-state lighting applications
Vibrant Colours
Deep blacks
Better power efficiency and thickness
Great response time
(Up to even 0.01ms)