TVs, screens, monitors
CRT
 LCD
 Plasma Display

What’s The Difference??
First..
What are displays based on?
Your brain will reassemble a
collection of small colored dots
(pixels) into a meaningful image.
 Your brain will reassemble a
sequence of still pictures (frames)
shown in rapid succession into a
single, moving scene.

CRT
Cathod Ray Tube.
 Phosphors.

http://www.howstuffworks.com/tv4.htm
http://www.howstuffworks.com/tv7.htm
http://www.wikipedia.org/Cathode_ray_tube
LCD
Liquid Crystal Display.
 What are Liquid Crystals?

Solid
Liquid
http://www.wikipedia.org/Liquid_crystal
Liquid Crystals
LCD
Light Polarization.
 Liquid Crystals can be oriented using
magnetic/electric fields to control
light passage.

http://www.wikipedia.org/Polarization
http://www.howstuffworks.com/sunglass2.html
http://www.howstuffworks.com/lcd2.html
Passive Matrix
http://www.howstuffworks.com/lcd4.html
Active Matrix (TFT)
Plasma Display

What’s Plasma?
http://electronics.howstuffworks.com/plasma-display.htm
http://www.wikipedia.org/Plasma
Plasma Display
What’s Plasma?
 Neon and Xenon.

http://electronics.howstuffworks.com/plasma-display1.htm
So… Which Is The best?
May be CRT?
Pros:
 The Cheapest.
 Best colors.
 More responsive.
 Multiple resolutions.
 More rugged.
Cons:
 High power consumption.
 High eye strain.
 Too big and heavy.
 Uneven light output.
 Poor focusing across entire
screen.
 Picture distorted by
magnetic field
 Burn Ins(screen saver)!!!!
Or, LCD?
Pros:
 Very power Efficient.
 Very thin and weigh less.
 Less eye strain.
 More adjustable.
 Environmentally friendly.
 Lives longer.
 High Resolutions.
Cons:
 Narrow viewing angle.
 Pixelates on low-resolutions.
 Can’t produce true black
(poor color saturation).
 Picture affected by magnetic
and electric fields.
 Less responsive (Ghosts and
Blurs).
 Fragile.
Then, is it A Plasma?
Pros:
 No geometric
distortion.
 Even light output.
 Less eye strain.
 Perfect focus.
 No susceptibility to
magnetic fields.
 Largest viewing angle.
 Small response time.
Cons:
 Very expensive.
 Low Brightness (not for
bright places).
 Lower resolutions.
 Pixelates on low-resolutions.
 Even More Burn Ins!!!!!!!!!
 Fragile.
 Dies sooner.
References





http://www.howstuffworks.com
http://www.wikipedia.com
http://www.cnet.com
http://www.plasmadepot.com
http://www.ecoustics.com
Mohamed Khaled Katri
mohamedkkatri@gmail.com