The monitor is an indispensable hardware (physical component) in a personal computer. It is in charge of translating the signals sent by the graphics card into images , which refer to the data that comes from the computer.The monitor is a data output device that allows the user to know the working interface of the operating system and to find out, visually , the information and files contained in a computer.

What is the monitor for?

A computer monitor is a hardware component for display . Shows the user the results of the computer processing by the graphics card.

The monitor is used to:

  • Browse among the functions that the computer offers in its operating system
  • Get a view of the interactions that are achieved through the internet, such as receiving email, using social networks, communicating via video call
  • View visual files such as videos, movies
  • Show texts in the process of writing and other documents
  • View graphs generated with computer data
  • Have visual evidence of a design, be it graphic, architectural or of a different nature, made with computer software
  • Find out about the information handled in the computer, through the input and output devices
  • Entering instructions and information (in the case of touchscreen monitors, which act as input and output devices at the same time)

Parts of a monitor

The basic component of a monitor is a screen , which can be tactile or simply display visual content. Nowadays, given the optimization of the sizes of electronic components, monitors have added more useful functions in their physical structure.

A modern monitor can also offer:

  • USB port for inserting memory or additional hardware, such as a mouse, keyboard, or external hard drive.
  • SD memory input , whose presentation is in the form of a card.
  • Audio output , to connect headphones.
  • Webcam , included for online interactions with other users, through video calls.

Monitors with a touch screen can be used as information input devices , entering data and executing commands by using the fingertips against their surface. Of course, it is first required that this screen present us with a window where we are asked to perform an action.

Monitor history

The first monitors were monochromatic (a term with Greek roots meaning “one color”), 1 bit per pixel. It only supported 2 colors: black and green or amber. One of the colors served as the background of the screen, and the second was for the text.

Monochrome monitors were used in text mode, because graphical environments did not yet exist on computers.

Subsequently, the first color monitors began to be manufactured, already adapted to work with graphic environments, which began with their dissemination. In this phase of the monitor’s development, there was an evolution in the resolution of the screen and the ranges of colors that were handled for displaying the information .

Monitor evolution

Monitor: information output device

At each stage of the monitor development there is a representative with characteristics that defined that generation. These most prominent monitors are:

  • TTL monitors : Only text is displayed on them, and the color black is accompanied by green or amber.
  • Color monitors: they are CGA monitors with 4 colors, 2 bits per pixel, with a resolution from 200 x 400 to 400 x 600.
  • EGA monitors: they are monitors with 4 bits per pixel and 16 colors maximum, with resolutions from 400 x 600 to 600 x 800.
  • VGA monitors: they are 8 bits per pixel, 16 bits per pixel and 32 bits per pixel monitors, which support resolutions from 600 x 800 to 800 x 1200.
  • SVGA monitors : increase the number of colors from 32 to 64 bits (“true color”), and the resolution up to 1600 x 1800.
  • UVGA (Ultra VGA) Monitors : Increase resolution up to 1800 x 1200.
  • XGA monitors: high resolution monitors, in which the number of colors reaches 65,536.

Today’s monitors, which carry LCD (Liquid Crystal Display), or plasma, or LED screens, have a resolution of 1920 x 1080 up to 8165 x 6124, representing 2,073,600 colors and up to 50,002,460 colors, respectively.

Among these current monitors, with LCD, plasma and LED screens, are the touch screens.

Touch screen monitors are classified into:

    • Infrared (IR) touchscreens
    • Resistive touch screens
    • Capacitive touch screens
    • Surface acoustic wave touchscreens

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Dr. Samantha Robson ( CRN: 0510146-5) is a nutritionist and website content reviewer related to her area of ​​expertise. With a postgraduate degree in Nutrition from The University of Arizona, she is a specialist in Sports Nutrition from Oxford University and is also a member of the International Society of Sports Nutrition.

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