A black and white monitor is called a monochrome monitor. In this type of monitor, only one color of light is emitted from the screen. The image on this monitor is completely black and white.
Color monitor:
Color monitors display images or text in a combination of multiple colors. In fact, in color monitors, the three colors red, green and blue (RGB) are mixed in different proportions to form different colors. That's why color monitors are also called RGB monitors.
In the case of this monitor, 100 percent red and 100 percent green are mixed to produce yellow. Magenta color is obtained by mixing 100% red and 100% blue. In this way, different percentages of red, green and blue colors mix with each other and create different colors. So we see many more colors besides red, green and blue on the monitor.
At present, two types of color monitors are widely used. CRT monitor and LCD monitor.
CRT Monitor:
Monitors that use cathode ray tubes are abbreviated as CRT monitors. Cathode ray tubes are commonly called picture tubes. A 15-inch CRT monitor can display a maximum of 25 lines and a maximum of 40 letters, symbols or numbers per line. Monitors with cathode ray tubes tend to be larger in size and heavier in weight.
LCD Monitor:
Since the invention of the personal computer, both monochrome and color monitors used in computers were made with Cathode Ray Tube (CRT). With the advancement of technology, the demand for LCD (Liquid Crystal Display) monitors has increased. Generally this technology was used more in the case of laptops, palmtops etc. But currently this technology is also used in personal computers. Instead of pixels, LCD monitors have liquid crystals or cells. Since CRT is not used in these monitors, the monitors are much smaller in size, thinner and lighter in weight.
Features of LCD Monitor:
(1) These monitors use liquid crystal instead of CRT.
(2) Smaller in size and less weight due to absence of Cathode Ray Tube (CRT).
(3) Takes less space.
(4) The quality of graphics is very high.
(5) These monitors consume less power.
Monitor size or shape:
There are different sizes of monitors available today. Different sizes of monitors like 14 inch, 15 inch, and 17 inch monitors are used for different tasks. The dimension of a monitor from one corner to another is the size of that monitor.
Summary and information
Monitor is the main output device of the computer.
The monitor looks a lot like a home TV.
The monitor displays the result after inputting data from the input device into the computer.
A device called Cathode Ray Tube is used in the monitor. It is called a picture tube
There are two types of monitors available, monochrome (black and white) and color.
An image or letter, number is expressed on the monitor by a combination of numerous small dots or footkeys. Those are called pixels.
A video display adapter is used to display any output on a monitor. © We abbreviate monitor as VDU. VDU stands for Visual Display Unit
C.G.A, E.GA and V.G.A. These are some adapters.
V.G.A. is a popular adapter. O V.G.A. The card can display graphics of different resolutions.
Monitors with cathode ray tubes are called CRT monitors.
CRT monitors use a large number of pixels to display images or characters. O CRT monitors are very large and heavy in size.
Monitors that use liquid crystal instead of pixels They are called LCD monitors.
LCD monitors are very small in size, thin and light.
Practitioner
A. Answer the following questions :
1. Which is the main output device of computer? Write about structure of a monitor ?
2. Describe monochromatic and color monitors ?
3. Write what you know about monitor resolution ?
4. What are pixels? Write what you know about it ?
5. Write all you need to know about VGA monitor ?
6. Write what you know about LCD monitors ?
7. Write the characteristics of LCD monitor ?
4. What is a video display adapter? What is its function?
9. Write down all you need to know about Monochrome Monitors?
10. Write what you know about CRT monitor ?
B. Write notes:
(1) VGA monitor
(2) LCD monitor
(3) Resolution
(4) Pixels.
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