what is a output device monitor printer bit mapping ?

Output Device: The device through which the process is performed on a computer is called an output device. Are The 

output devices are of the following types:

Monitor: - Monitor is an output device. It is also called visual display unit. It is like watching TV. The monitor is one of the most important output devices. Without it, the computer is incomplete. It displays the output as Soft Copy on its screen.

There are three types, depending on the colors displayed by the monitor:

1. Monochrome Monitor: - This word consists of two words Mono ie Signal and Chrome means Color. These types of monitors display the output as black & white.

2. Gray - Scale Monitor: - These monitors are special type of monochrome monitors. Which output in various gray shades. Let us display. These types of monitors were mostly used in handheld computers such as laptops. .

3. Color Monitor: - This type of monitor displays output from RGB (Red, Green, Blue) colors. this . The monitors are capable of displaying graphics in high resolution. According to computer memory, such monitors have the ability to display crores of colors with color.

CRT (Cathode Ray Tube Monitor: - This technology is capable of providing cheap and colorful output. It has picture tube element similar to the old TB set.

Flat panel Monitor: - These are new technology monitors. Charged chemicals and gases are combined between glass plates. These are called thin panel devices. It is being used in laptops, consumes less electricity, and is lighter in weight. It uses LCD (Liquid Crystal Display) technology. Two other flat panel technology names are GPD (Gas Plasma Display), Electro luminescent Display (EL). Their display quality is better than LCD. Today's new technology is LED, whose full name is Light emitting diode.

Characteristics of a Monitor (Key Characteristics of Monitor):

1. Resolution (Resolution): - An important feature of a display device is the clarity of the resolution or the screen image. The picture in the monitor is made up of small dots. Which is called a pixel when this point. When it glows, the picture is created. The number of points present in the unit area represents the resolution. The resolution of the monitor should be high. The higher the resolution, the greater the clarity of the image.

2 . Refresh Rate: - The monitor keeps working continuously. The image on the computer screen continues to fade from right to left and from top to bottom, which is arranged by electron gun. We can experience this only when the screen clicks or when the refresh rate is low. The refresh rate in the monitor is measured in Hertz. .

3. Dot Pitch: - Dot pitch is a type of measurement technique. Which shows that between two pixels. What is the horizontal difference or distance. It is measured in millimeters. It displays the quality of the monitor. Does. The dot pitch in the monitor should be less. It is also called phosphor pitch. Color monitor's dot pitch  Ranges from 0.15 MM to 30MM.

Interlacing or Non Interlacing: - It is one such display technology. That is, the quality of resolution in the monitor and. Increases more. In interlacing monitors, the electron gun used to pull only half the line because the interlacing monitor only refreshes half the line at a time. This monitor can display more than two lines in each refresh cycle. Its only drawback was that its response time was slow. Its response time was slow. Both types of monitors have good resolution capabilities. But a non-interlacing monitor is better.

Bit Mapping: - In the earlier monitors, only text could be displayed and their number of pixels was limited to the number of sears. From which textiles were manufactured. The technique used to develop graphics in which both text and graphics can be displayed is called bit mapping. In this technology, every pixel of bit 14 graphics is controlled by the operator. This allows the operator to draw any shape on the screen.

CGA = Color Graphics Adapter 
EGA = Enhanced Graphics Adapter 
VGA = Video Graphics Array 
XGA = Extended Graphics Array 
SVGA = Supper Video Graphics Array (VESA BIOS Extension)

CGA Video Standard: - Its full name was Color Graphics Adapter. It displayed four colors. It was developed by IBM company in 1981. Its resolution was 320X200.

EGA Video Standard: - Its full name Enhanced Graphics Adapter used to display sixteen colors. It was developed in 1984, three years after the IBM company CGA. Its resolution. Was 640x320.

VGA Video Standard: - Its full name Video Graphics Array used to display 256 colors. It was developed in 1987, three years after IBM company EGA. Its resolution was 640x320. in this . High-color games, movies, videos, etc. were not displayed.

EGA Video Standard: - Its full name Extended Graphics Array 16 million colors by it. Used to be displayed. It was developed in 1990, three years after the IBM company CGA. Its resolution was 800X600 and 1024X768.

SVGA Video Standard: - Its full name Supper Video Graphics Array used to display 16 billion colors. It was developed in 1993, three years after the IBM company CGA. Its resolution was 1024X768 and 1600X1200.


Printer Printer is an online output device. From this, the output is printed on paper and presented. The output taken on paper is called Hard Copy. Through this, computer signals are converted into natural language (English, Hindi) and printed as hard copies. Printing

Depending on the technology, there are two types of printers.
Impact Printer These are the printers that make voice while printing. That is why they are called Impact printer. There are two types of Impact printer.

1. Dot Matrix printer 2. Solid printer 

Dot Matrix printer: - It is an impact printer. Their print heads have a matrix of pins. These pins hit the ribbon, printing on paper. In this, letters are made up of small dots. Their printing heads have a Horizontal Group of 9, 14, 18 or 24 pins. Out of the pin head of one column at a time. They print out the dots. By which a letter is formed in many steps. In this way, the printing head draws in the direction of the line. In this, the printing head is controlled by a computer. Their printing speed is 30 to 600 characters per. Seconds. These printers do printing in both directions. These printers are of two types depending on the printing quality.
what is a output device monitor printer bit mapping

1. Draft Quality Printer: - It has normal printing.

2 . Near Letter Quality Printer: - In this printing, a letter is printed twice. Its printing speed. It is slow.

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