computer monitors b. konkoth. types of monitors crt cathode ray tube lcd liquid crystal display
Post on 22-Dec-2015
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CRT
The filaments at the back of the cathode tube shoot a beam of electrons to the screen at the front of the tube
This screen is coated with phosphor that glows when struck by the electron beam.
LCD
An LCD panel produces an image using a liquid crystal material made of large, easily polarized molecules
2 types of LCD panels
Active matrix Most common Contains cells of
liquid crystal, a matrix of thin-film transistors (TFT)
provides a much brighter, sharper display
Passive matrix Dual-scan display Has a row of
transistors running on the top of the screen as well as the left of the screen
Video cards
Interface between the monitor and the computer.
Also called graphic adapters, video boards, graphics cards, or display cards.
Sometimes the video controller with a video port is integrated into the motherboard.
Methods of data transfer
RGB video port standard method of passing three separate
signals for red, green, and blue which most video cards and CRT monitors use.
uses a regular 15-pin Super VGA port
Methods of data transfer
DVI port - Digital Visual Interface port digital interface standard used by digital
monitor such as a digital flat panel monitor, and digital TVs (HDTV).
for a video card that only has a DVI port, you can purchase a VGA converter so you can connect a standard VGA cable to use a regular analog monitor.
Methods of data transfer
S-Video – Super Video this method sends two signals over the cable,
one for color and the other for brightness, and is used by some high end TVs and video equipments.
it uses a 4-pin round port
Methods of data transfer
Composite video using this method, the red, green, and blue
(RGB) are mixed together in the same signal. this is the method used by television and can
be used by a video card that is designed to send output to a TV
Flat Screen Monitors
LCD - PlasmaLCD - Plasma Picture Quality
Normal computing, both LCD and plasma screens will provide sharp and clear display
Watching Blu-Ray movies or playing high-definition games, Plasma screens have less picture lag and sharper color resolution than LCD displays.
LCD - Plasma
Power Usage LCDs use considerably less power than
plasma displays, which use self-lighting pixels
Screen Burn-In Plasma screens are more likely to
experience screen burn-in (the screen becomes permanently discolored where the unchanging image was)
LCD - Plasma
Pixel Levels LCD screens generally have more pixels
per square inch than plasma makes them ideal if you are working with
complex spreadsheet programs or editing software
Size Plasma monitors are usually ahead of the
curve regarding their maximum size the biggest monitors are plasma
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