OLED , LED , LCD , Plasma.


New member
Aug 10, 2019

Which one would you reccommend is best ? And, for the more technical of you out there, could you explain quite simply some of the basic differences between them.


Earl Gray.

Andrew Everard

New member
May 30, 2007
OLED: Organic light-emitting diodes. Self-illuminating, has the benefit of good contrast and brightness, and can be made very thin indeed, but is expensive, hard to make in large screen sizes, and there are conflicting reports about its operating life, some suggesting as little as 2.5 years.

However, Mitsubishi showed a scalable OLED screen at the recent CEATEC show in Japan, made using arrays of smaller OLED 'tiles'. It's mainly designed for advertising applications.

LCD: a Liquid Crystal Display distantly related to the one on old calculators, but rather more complex as it uses red, green and blue layers. Needs to be back-illuminated to produce a picture. Until recently the only way of doing this was an array of very thin fluorescent tubes.

LED: As LCD above, but backlit with light-emitting diodes. Some TVs use strips of LEDs at the side of the screen, others arrays of LED lamp behind the LCD panel. Lights are usually white, but some companies working on using clusters of red/green/blue LEDs, and also controlling areas of LEDs to match the picture content. This last bit is called 'local dimming'.

Plasma: The oldest flatscreen TV technology, but still much in favour with some companies. Like OLED is self-illuminating: it uses tiny cells between two panels of glass containing a mixture of noble gases. This mixture is turned into a plasma when electricity is applied, and this plasma excites phosphors to emit light.



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