The way that video displays work

28.11.2013 Nicky Herak


We only watch the screen of the monitor, have we ever imagined that how images and videos are displayed on the monitor ? What are the graphic systems and the processes used in monitors that display the computer software output ? The monitor is a hardware device in which we can see the entire CD, DVD, Internet, and software contents. Let us elaborate the function of this video device.



Some devices work on the designs of (CRT) Cathode Ray Tube. Except this, the video devices work through other technical means. Let's see how cathode ray tubes work. The light of the electric rays (cathode rays) that exits from an electron gun, cross the focusing system and magnetic deflection coil. The magnetic deflection directs electrons to the phosphorus screen. The phosphorus spreads light in the all screens and through the phosphorus, the monitor displays an image. However, there is a problem with phosphorus, which is that the light of the phosphorus does stay constant. Therefore, there is a need for sustaining the light for showing the screen on the monitor. There is a solution to this problem. The solution is that the phosphorus glow option is speeded up so that the light remains constant due to rapidly scanning the electronic beam on the same place. This process is called Refresh CRT.



Above is the process by which a CRT monitor is able to produce images on its screen allowing people to watch it and to work easily. This video display process has become very advanced with new technology like LCDs (Liquid Crystal Displays) or LEDs (Light Emitting Diodes). This technology is used for displaying images and video on a screen using various other methods to produce quality pictures. The above details show the structure of the design that most screens contain and use to display visual data output.



Computer users connect third party graphics cards to motherboards in order to handle heavy graphical workloads such as when gaming, or using photo & video editing, CAD (Computer Aided Design) & CAM (Computer Aided Manufacturing) applications. Normally a motherboard's onboard graphics crad or one built into the latest generation of CPUs are enough for everyday light graphical requirements for websurfing and word-processing.


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