What is a Monitor?

1. Monitor (Display Screen)

What is a Monitor?

monitor is an output device that displays information from the computer visually — including text, images, videos, software interfaces, and more. It's also called a display screen or visual display unit (VDU).

Main Functions

Function

Description

Display Output

Shows visual output from the CPU

User Interface

Lets you interact with applications visually

Multimedia

Plays video, games, presentations, and animations

Real-Time Feedback

Shows instant results of commands (e.g., typing, coding)

Key Components

  • Screen Panel (LCD/LED/OLED) – The main display surface
  • Power Supply – Provides electricity to run the screen
  • Video Ports (HDMI/VGA/DisplayPort) – Connects to CPU
  • Controls (Brightness, Contrast, etc.) – Adjust display settings

Types of Monitors

Type

Description

CRT Monitor

Old bulky type, uses cathode-ray tube

LCD Monitor

Flat-screen, lightweight, uses liquid crystals

LED Monitor

Improved LCD with LED backlight, energy-efficient

OLED Monitor

High contrast & color quality, used in premium displays

Touchscreen Monitor

Allows interaction via touch, no mouse needed

4K / 8K Monitor

Ultra HD resolution, used for professional media work

Common Monitor Sizes

  • 15" – 17" → Basic office use
  • 19" – 24" → General home and business use
  • 27" – 32"+ → Gaming, design, professional use

Uses in Real Life

  • Typing documents
  • Watching videos and streaming
  • Playing games
  • Graphic design and editing
  • Learning and teaching online

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