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It depends what you mean by LED.

Liquid Crystal Displays need a light source, as LCDs produce non themselves.

This light, used to be provided by Cold Cathode Flourescent Lamps (CCFL). These were delicate, failed after a while and used high voltage to run.

Modern LCDs use white, Light Emmiting Diodes to provide the light source.

These use low voltage and run cool. They could only be used now, because it took a while for development to produce a good white light, with a high light output.

So when a TV is advertised as having LED technology, this is what they are referring to.

It is still an LCD TV, but with LEDs providing the light and yes they are better. They use less power and are potentially more long lived.

TVs are being developed that use red, green and blue, LED's in a matrix to provide the picture content and light. They are used in very large displays at football stadiums.

Small versions are being developed using a flat film with LEDs 'printed' on it. This is called OLED (Organic Light Emitting Diode). So far they can only make small screens using this tech. but they are getting better, but more expensive at first.

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13y ago

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