CRT

Facts to know before reading

If you didn’t know already there are two cool things our brains does that make television (T.V) possible.

• When our brains are presented with a series of still images shown in rapid succession they will make the image seem to be moving. In effect our brains make up the bits in between and we see a moving image!

• The picture we see on T.V is really made up of thousands of tiny colored dots called pixels. The pixels are arranged so that they resemble the image, our brain transforms the pixels into a meaningful image!

• There are three basic colours Red, Green and Blue. These can be used in different combinations and shades to make any colour across the entire spectrum.

Types

CRT:

Stands for ‘Cathode Ray Tube.’ The Cathode Ray Tube is a specialized vacuum tube in which electrons are fired into phosphors. The electrons are guided by magnetic charges. These have been known to cause interference with magnetic devices that are placed too close to the CRT screen. The phosphors coats the inside of the screen so when it is hit by the electrons it lights up and displays a colour on the screen. In a color TV there are three electron beams and three phosphors arranged in red, blue and green dots or strips. The electron beams hit the different coloured phosphors to produce different colours on the screen. To produce yellow the blue and green beams are turned on whilst the red beam is turned off.

Pro’s Con’s

• sharp image

• Accurate images • Big and bulky

• Low pixel count

• Impractice

• Not many being made anymore

Plasma

A plasma T.V is made up of thousands of pixels between two plates of glass. Each pixel is made up of three cells. The cells are made up of a phosphors coati...

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...n LCD? They’re the same thing aren’t they? Wrong. In fact LCD’s use inferior fluorescent tubes so they don’t get local dimming. Also LCD’s are less energy efficient this means they cost more to run. Another point is that the LCD is slightly larger than the LCD it’s fluorescent tubes take up more room the LED T.V’s tiny little LED lights.

Finally it comes down to the LED and the Plasma. Which is better? Well that really depends on their desire purpose. The plasma is thicker and less energy efficient but it has no view angle problems and is significantly less expensive which makes it the more practical choice for watching television. The LED T.V is better for more direct use like video games where you are 100% focused on the screen.

It really comes down to personal preference the more practical choices are the plasma and LED due to their clear picture and better quali