What is a Printer?
A computer is an electronic device that takes input from the user, processes it, and gives the output. A computer processes the data at a very high speed and with high accuracy. It processes the input according to the set of instructions provided to it by the user and gives the desired output quickly.
Basic Functions Of Computers are Inputting the Data, Processing the Input as per the Instructions provided, Storing the result and then providing the users with the desired output.
Components of Computer:
- Hardware: The physical part of the computer which we touch and feel is called hardware.
- Input Device: The device that is used to take input data. Example- Keyboard, Mouse, Microphones, etc.
- Output Devices: The device that is used to output the result. Example- Printer, Speakers, Monitors, etc.
- Software: Software is a set of instructions/tasks that the computer has to perform.
- Application Software: It is software used to perform tasks requested by users such as word processing and web browsers.
- System Software: It is software designed to run computer hardware and applications programs. It includes programs like-Operating Systems, Language Translators, etc.
A printer is a device that accepts text and graphics output from a computer, and it transfers this information to paper, sheets. Printers can print any information that has been passed to it, whether it be Text, Numbers or Images. It depends on the type of printer that what quality or color the printed matter would be.
Qualities of Printers:
- Color: Colored printers can print in both i.e, colored and black-and-white. Hence, colored printers are more expensive than normal printers.
- Resolution: Printer’s resolution is usually measured in dpi(dots per inch). Expensive printers have resolutions of about 550 to 600 dpi.
- Speed: For printing a good amount of stuff you need to have a fast printer. Hence, speed is an important factor while considering printers.
- Memory: It is also an important factor for printers as having enough memory will result in good speed and better performance.
Type Of Printers
Depending upon the printing methods and the quality of images produced, printers are of two major types:
- Impact Printers
- Non-Impact Printers
This type of printer works with paper via direct contact with an ink ribbon. It has similar mechanisms as of typewriter.
Examples: Daisy-Wheel Printers, Dot -Matrix Printers, Line Printers.
- Daisy-Wheel Printers: Daisy wheel printing is a mechanical impact printing technology. It is called daisy-wheel because its printing mechanism looks like a daisy. Its speed is usually 25-50 characters per second.
- Dot-Matrix Printers: The Dot-Matrix printers uses 9 to 24 pin print heads depending upon the quality print required. 24 pin printers produce more clarity that 9 pins dot-matrix printer. More number of pins results in more clarity. Usually inexpensive and speed ranges between 100 and 550 characters per second.
- Line Printers: Line Printers(also called line-at-a-time printers) ,as the name suggests it can print whole line at once . Speed ranges somewhere between 1,000 to 6,000 lines per minute.
Non-Impact Printers do not need to touch the ink ribbon to print the documents. Maintenance of Non-Impact printers is easier than Impact printers.
Examples: Inkjet printers and Laser Printers.
- Inkjet Printers: The inkjet printers are the most common and widely used printers in both professional and domestic settings. It is popular due to its numerous advantages and very few drawbacks.
a) Capable of printing highly detailed and photo elastic prints.
b) Small footprints
c) Environment friendly
d) Compact Design
f) Best Picture and Image quality
a) Higher cost per page than laser printers
b) Less Reliable
c) Slow print speed
- Laser Printers: Laser Printers were developed by Xerox in 1960s. The majority of laser printers use light, photoreceptor belts, and photosensitive drums. During print, the laser will scan page line by line. The most accepted writing method is black and white lasers, which print content in black text.
a) Cost-effective than inkjet printers.
b) High print speed.
c) Expandable with paper trays, finishes, etc.
d) High paper capacity.
a) Large footprints.
b) High voltage usage.
- LED Printers: LED Printers are quite similar to Laser Printers, but it uses LED instead of laser to create pictures/images. LED printers are considered are more efficient and reliable than laser printers.
c) Cheaper than laser printers.
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