Types of Monitor

Types of Monitor

Definition of Monitor

• The term "monitor" is often used synonymously with "computer screen" or "display."
• The monitor displays the computer's user interface and open programs, allowing the user to interact with the computer, typically using the keyboard and mouse.

 

Types of Monitor

There are Seven main types of monitors: the CRT, or Cathode Ray Tube monitor, the LCD Flat Panel monitor, and the TFT-LCD monitor, Plasma Display, Surface-conduction electron-emitter display (SED) , Digital Light Processing (DLP),Organic Light-Emitting Diode (Oled).

 CRT (Cathode Ray Tube) Monitor

• This is the most inexpensive monitor in the market today. It sports quite a large case, which includes the flat/funnel tubes that displays the images on the screen.

• Pixels, made up of phosphors, are the tiny components that make up the image shown onscreen. These pixels are struck by electrons, which make the pixels glow and eventually form the desired image on the screen.

LCD Flat Panel Monitor

• LCD technology makes use of a liquid crystal solution that are present in two panes of polarized and partitioned glasses. 
• By adjusting the amount of light that passes through these panels through an electric voltage, images are created on the screen. 
• This technology also reduces blurring and colour smudging during motion pictures, which makes this type of monitor appropriate for gamers or film enthusiasts.
• These compact screens are perfect for those who don’t have much space to spare on their office desks or at home. Moreover, due to its technology, the display is also far superior than the CRT monitor’s.
• A downside to this type is that, aside from being more expensive, it costs to have some add-ons attached to it, such as SVGA, or Super Video Graphics Array technology for improved onscreen display. A DVI-input, or Digital Visual Interface, is also recommended for this type of monitor.

TFT-LCD Monitor

• A Thin Film Transistor (TFT) – LCD monitor is now being more widely used with LCD monitors, because of of its high level of resolution and sharpness. The only difference is a thin film transistor that is applied to the screen, which results in better control of pixels.
• This type of monitor is recommended for those who play animated, colourful, and high-resolution games, as well as graphic artists who may need to check out different fonts on the computer screen.

Plasma Display 

• A plasma display is an emissive flat panel display where light is created by phosphors excited by a plasma discharge between two flat panels of glass. The gas discharge contains no mercury a mixture of noble gases (neon and xenon) is used instead. This gas mixture is inert and entirely harmless.
• The glass panels seem to be vacuum sealed, because when they are broken the plasma breaks up, seemingly from the addition of air to the space.

Surface-conduction electron-emitter display (SED)

• Surface-conduction electron-emitter display (SED) is a flat-panel, high-resolution display. Some SEDs have a diagonal measurement exceeding one meter. 
• The SED consists of an array of electron emitters and a layer of phosphor, separated by a small space from which all the air has been evacuated. Each electron emitter represents one pixel. 

• The SED requires no electron-beam focusing, and operates at a much lower voltage than a CRT. 
• The brightness and contrast compare favorably with high-end CRTs. Prototype electron emitters have been developed with diameters of a few nanometers. SED technology can offer unprecedented image resolution.

Digital Light Processing (DLP) 

• Digital Light Processing (DLP) is a technology used in projectors and video projectors. 
• In DLP projectors, the image is created by microscopically small mirrors laid out in a matrix on a semiconductor chip, known as a Digital Micromirror Device (DMD). 
• Each mirror represents one pixel in the projected image. 
• The number of mirrors corresponds to the resolution of the projected image: 800x600, 1024x768, 1280x720, and 1920x1080 (HDTV) matrices are some common DMD sizes. 
• These mirrors can be repositioned rapidly to reflect light either through the lens or on to a heat sink.

Organic Light-Emitting Diode (Oled)

• An organic light-emitting diode (OLED) is a thin-film light-emitting diode(LED) in which the emissive layer is an organic compound OLED technology is intended primarily as picture elements in practical display devices. 
• These devices promise to be much less costly to fabricate than traditional LCD displays. 
• When the emissive electroluminescent layer is polymeric, varying amounts of OLEDs can be deposited in rows and columns on a screen using simple "printing" methods to create a graphical color display, for use as computer displays, portable system screens, and in advertising and information board applications. 
• OLED may also be used in lighting devices. OLEDs are available as distributed sources while the inorganic LEDs are point sources of light.