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Nick Patel

on 7 March 2016

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Transcript of Monitors

Era of inexpensive, color, multisync VGA monitor that could handle a huge range of resolutions with aplomb.
Earliest monitors were row of flashing lights that blinked in a certain pattern when it followed certain instructions
By: Simarjot, Komal, Bryan and Nick
What is a Monitor?
Computer monitors are displays that are designed to show text and graphics created by programs so that the user has a visual interface.
Early computers used long rolls of paper tape which were punched in by a pattern that represented a computer program or a stack of cards that ran the program.
An operator ran these results and an automatic typewriter which typed the computer output in human readable form, numbers and letter.
The first cathode ray tube appeared in computers as a form of memory.
Typewriter were able to communicate with each other over teletype wires.
CRTs were being used as virtual paper in a virtual teletype.
This proved for a faster and more flexible than paper.
This become the dominant method of interfacing.
A new technology emerged that used a charged gas trapped between two glass plates.
When a charge was applied across the sheets in certain locations, a glowing pattern emerged.
Terminals become the dominant method for interfacing with computers.
This device hooked up to computers through a cable that commonly transmitted code only for text characters.
The liquid display was invented, and was used in calculators and wristwatches.
PC’s supported composite video monitors for a higher quality image.
Graphics and colours were implemented.
IBM PC shipped with a directly attached monochrome video display standard that rivaled a video terminal in sharpness.
The first Macintosh included a 9 inch monochrome monitor.
It supported only black and white video and external monitors, until the second model came out.
Launch of many PC competitors, such as the Atari ST series and the Commodore Amiga series.
NEC invented the first multi-sync monitor which dynamically supported a capability soon became standard in the industry.
LCD monitors were released that could finally begin to compete with CRT monitors at a reasonable price.
Monitors are very similar to televisions but they display information at a much higher resolution
It is also known as a screen or a display device
Monitors are able to connect to an HDMI, DVI and a VGA port on the computer
They are an essential part of the computer system in which they allow users to extract information and the monitor provides the output
Modern-day computer monitors translate information through LCD technology (graphic cards and liquid crystals) but back in the day, older CRT monitors used to provide output through fired electrons at phosphor dots on the screen

General Info
Types of LCD's
IPS (In-plane switching)
Better viewing angles
Better colour reproduction
Slower response time
TN (Twisted Nematic)
Fast Response Time
Cheapest and most common type of LCD
Unable to display all the colours your graphics card produce
Parts of a Computer
Types of Monitors
(Cathode Ray Tube)
(Light Emitting Diode)
(Liquid Crystal Display)
Liquid crystal display
More common in notebook and smaller computer
Less power consumption
Allows displays to be much thinner
100% flicker free
Higher resolution
Screens are mostly back lit or transmissive to make them easier to read
Uses liquid crystals and polarizing light to create images
Popular Manufacturers
: LG, Acer, Asus, Samsung

Connections to computers are via
: VGA, HDMI, DVI, Displayport, Thunderbolt, LVDS

Aspect ratios
range from 4:3, 16:10 and 16:9

320 X 200, 800 X 600, 1920 X 1080, 2560 X 1600, 2880 X 1800, 5120x2880 and 3840x2160

Curved design
Glossy screen
Power saving
Touch Screen

More Info...
LCD Monitors
Types of LED's
Edge LED Monitor
Slimmest type
Most Affordable
Bad contrast ratio
RGB LED Monitor
Emits red, green and blue light instead of white light
Most Expensive

LCD Monitors
use CCFL's for back light
energy efficient
small viewing angles
100% flicker free
LED Monitors
uses LED's for back light
longer lifespan
produce less heat
more eco-friendly for disposal
produce higher contrast images
more expensive
Some CRT monitors smell after getting heated
Karl Ferdinand Braun invented the cathode ray tube in 1897
CRT has better colour purity than LCD, reason for professional photo editors to prefer CRT over LCD
LCD monitors reduce the risk of computer vision syndrome which can cause headaches, blurred vision, dry eyes and neck pain
Some monitors have the computer built into them
Screens on other devices such as phones and watches often use the same type of displays

LED Monitors
Light emitting diode (LED)
Don’t use CRT and fluorescent technology
Light diodes illuminate the screen in one of two different ways, or a combination
Uses a leds to illuminate the screen instead of CCFL
Require more power than LCD

Old VS New
• CRT monitors are much thicker and heavier due to the cathode ray
• No dead pixels
• Cheap
• Not as good picture quality due to the out technology
• Better viewing angle
• Glare
• Ghosting
• 4:3 aspect ratio

uses LED's for back light
longer lifespan
produce less heat
more eco-friendly for disposal
produce higher contrast images
more expensive
Cathode ray tube
Used in most televisions and computer displays
Works by moving an electron beam back and forth across the back of the screen either interlaced or non - interlaced hitting phosphor dots on the inside glass tube
Contains three electric guns, red, green and blue
as the guns hit the phosphors on the CRT, it will glow certain intensities
CRT Monitors
As a new line begins the process repeats until the screen has become completely drawn by line
Parts of a Monitor

Plastic Housing -
A large number of synthetic usually organic materials that have a polymeric structure and can be moulded when soft and then set.

Cathode Ray Tube -
A high vacuum tube in which the cathode ray produces a luminous image on a fluorescent screen, used chiefly in televisions and computer terminals

Circuit Board -
A thin rigid board containing an electric circuit.

Also known as a cord, is one or more wires covered in plastic that connects the computer to a device or a power source.

Electric Gun-
A electrical component that produces an electrical beam with precise kinetic energy.

Panel Glass-
The rectangular, framed part of the monitor.

Shadow Mask-
A metal screen, behind the phosphor screen that is able to produce colored images.
Present-day monitors with laptops and other PC’s are quite fast with color and a range of frequencies.
Size has become smaller which has allowed for portability.
http://www.displaymate.com/lcds.html http://www.hardwaresecrets.com/everything-you-need-to-know-about-lcd-monitors/

What is the newest type of monitor?
4)Printing Press
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