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Classification of Monitor
The monitor is the display screen that is used to display the text and graphics, allowing users to give the result of the processing. It is the most common and popularly used output device for producing soft copy output. It displays the generated output on a television-like screen.
Classification of Monitor on the Basis of the Colors Displayed
- Monochrome Monitor: It displays only one color such as green or white against a contrasting background which is usually black. This monitor is used for text-only displays. It basically possesses only two colors, one for the foreground and one for the background.
- Grayscale Monitor: Grayscale monitor is a good monochrome monitor such that it can show the varying intensity of gray (from light gray to black) against a white or off-white background.
- Color Monitor: This type of monitor can display 16 colors to several million colors. Color CRT in graphics system designed as RGB monitor. Color graphics systems can be designed by games are designed for use with a color TV set.
Classification of Monitor on the basis of their Display Technique
Cathode Ray Tube (CRT) monitor
CRT operates much like a television set. A single electron gun (negatively charged heated metal) in a monochrome CRT sends a beam of electrons towards (the positively charged) phosphor-coated (phosphorescent) screen surface. The screen’s phosphor coating is organized into a grid of dots. The smallest phosphor dot that an electron gun can focus on is called a Pixel.
Merits of a CRT monitor
- It is comparatively cheaper than other monitors.
- It has better brightness.
- It has a larger viewing angle of almost 180 degrees.
- It has better graphics quality.
- It is comparatively durable.
Demerits of a CRT monitor
- It is a larger power requirement.
- It is larger and heavier.
- It cannot be used in portable computing devices.
- It is not better for the human eye due to larger radiation.
Flat Panel Monitor
There are several types of flat-panel monitors such as LCD, LED, and Plasma Display.
Liquid Crystal Display (LCD) Monitor
LCD is one of the common flat-panel monitors. It creates images with a special kind of liquid crystal that is normally transparent but becomes opaque when charged with electricity. The liquid crystalline material is sandwiched between two glasses or plastic plates.
Merits of LCD Monitor
- It is smaller and lighter.
- It can be used in portable computing devices.
- It has power requirements as compared to the CRT monitor.
- It is better for the human eye due to its low brightness and low radiation.
Demerits of LCD Monitor
- It has limited the viewing angle compared to other monitors.
- It is expensive than a CRT monitor.
- It has low brightness. So, it is difficult to view in a brighter environment.
Light Emitting Diode (LED) Monitor
LED monitor contains an array of light-emitting diodes as a video display. These diodes are turned on or off to display the output. Initially, it was used only for simple digital displays like in the calculator, digital watch.
Merits of LED Monitor
- It is smaller and lighter.
- It can be used in portable computing devices.
- It has a low power requirement.
- It is better for the human eye similar to the LCD monitor.
- It provides better brightness as compared to LCD and plasma monitors.
- It has a larger viewing angle of almost 180 degrees.
Demerits of LED monitor
- It is an expensive monitor.
- It has low brightness compared to the CRT monitor.
- It is difficult to maintain.
Gas Plasma Display
The gas-plasma display is like a neon bulb, in which the display uses a gas that emits light in the presence of an electric current. That is, the technology uses predominantly neon gas and electrodes above and below the gas. When electric current passes between the electrodes, the gas glows forming an image.
Merits of Plasma Monitor
- It is smaller and lighter.
- It can be used in portable computing devices.
- It has a low power requirement.
- It is better for the human eye similar to LCD and LED monitors.
- It has a larger viewing angle of almost 180 degrees.
Demerits of Plasma Monitor
- It is an expensive monitor.
- It has low brightness compared to the LCD monitor.
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