Get premium membership and access questions with answers, video lessons as well as revision papers.
The inner surface of the screen is coated with a Phosphorus material that emits/ produces light when struck by an electron beam. Whenever the electrons hit the phosphor, it glows, producing images.
When the Monitor is plugged into the Video card, it gets a scan frequency (or a signal) giving the timing of the screen redraws.
The electron beam must cross the screen in synchronization with the scan signal of the Video card. The beam starts at the top left of the screen, crossing to the right. As it does this, it excites the phosphor dots. On reaching the right side of the screen, it returns to the left side in order to refresh the line of pixels underneath the first one. It continues this process down the screen, returning to the top to do it over again when it has finished the entire screen.
During the process, the beam excites those phosphor dots, which the video card tells it to. Therefore, the card gives instructions to the electron gun to excite some pixels; hence, forming pictures.
On a Colour monitor, each pixel contains 3 separate dots, one for each of the primary colours of light; Red, Yellow, & Blue. Combining these colours together produces the range of colours that we all know.
Kavungya answered the question on April 2, 2019 at 06:47
- Give the factors that determine how severe the screen burnout is.(Solved)
Give the factors that determine how severe the screen burnout is.
Date posted: April 2, 2019. Answers (1)
- Give the ways on how to avoid screen burnout.(Solved)
Give the ways on how to avoid screen burnout.
Date posted: April 2, 2019. Answers (1)
- State and explain the types of Monitors.(Solved)
State and explain the types of Monitors.
Date posted: April 2, 2019. Answers (1)
- List the advantages of Monitors.(Solved)
List the advantages of Monitors.
Date posted: April 2, 2019. Answers (1)
- List the disadvantages of Visual Display Unit.(Solved)
List the disadvantages of Visual Display Unit.
Date posted: April 2, 2019. Answers (1)
- Explain voice output devices.(Solved)
Explain voice output devices.
Date posted: April 2, 2019. Answers (1)
- List the limitations of Voice Output.(Solved)
List the limitations of Voice Output.
Date posted: April 2, 2019. Answers (1)
- Give the advantages of Voice Output.(Solved)
Give the advantages of Voice Output.
Date posted: April 2, 2019. Answers (1)
- Draw a diagram to explain the classification of printers.(Solved)
Draw a diagram to explain the classification of printers.
Date posted: April 2, 2019. Answers (1)
- Non-impact printers(Solved)
Non-impact printers
Date posted: April 2, 2019. Answers (1)
- Explain Impact printers.(Solved)
Explain Impact printers.
Date posted: April 2, 2019. Answers (1)
- Explain line printers.(Solved)
Explain line printers.
Date posted: April 2, 2019. Answers (1)
- Give the disadvantages of using Printers.(Solved)
Give the disadvantages of using Printers.
Date posted: April 2, 2019. Answers (1)
- Give the advantages of using Printers.(Solved)
Give the advantages of using Printers.
Date posted: April 2, 2019. Answers (1)
- Give the comparisons between a Screen and a Printer.(Solved)
Give the comparisons between a Screen and a Printer.
Date posted: April 2, 2019. Answers (1)
- Give the characteristics of Graph Plotters.(Solved)
Give the characteristics of Graph Plotters.
Date posted: April 2, 2019. Answers (1)
- Give the areas where graph plotters are applicable.(Solved)
Give the areas where graph plotters are applicable.
Date posted: April 2, 2019. Answers (1)
- List the advantages of Graph Plotters.(Solved)
List the advantages of Graph Plotters.
Date posted: April 2, 2019. Answers (1)
- Give the disadvantages of Graph Plotters.(Solved)
Give the disadvantages of Graph Plotters.
Date posted: April 2, 2019. Answers (1)
- Explain the Computer Output on Microform process.(Solved)
Explain the Computer Output on Microform process.
Date posted: April 2, 2019. Answers (1)