Upload
lee-evan-sparks
View
216
Download
1
Tags:
Embed Size (px)
Citation preview
Name of presentationName of presentationCompany nameCompany name
Electrical Engineering Department 12th Batch
Name of presentationName of presentationCompany nameCompany name
Mehran University College Of Engineering And Technology
Khairpur Mir’s
Subject:- Computer Applications & E-Learning
Topic:- Printers
Lecturer:- Engineer Ehsanullah Memon Electrical Engineering Department
Gul Nawaz Khan Mahar 12K-EL 17
Made By
Overview:-Overview:-What is printer?
Types of printers
1.Impact printers:-
Dot matrix printersLine printers
Band printers
2. Non-impact printers:-• Ink jet printers• Laser printers
Printer:-
A printer is a device that accepts text and graphic output from a computer and transfers the information to paper, usually to standard size sheets of paper
Printers vary in size, speed, sophistication, and cost. In general, more expensive printers are used for higher-resolution color printing
Types Of printers:-Types Of printers:- Printers Personal computer printers can be distinguished as impact or non-impact
Impact printers:-
Early impact printers worked something like an automatic typewriter, with a key striking an inked impression on paper for each printed character
Creates image by using pins or hammer tp press an inked ribbon against paper
The best example of impact printers is type writer which is not generally used today
Example of impact printer:-Example of impact printer:-
Impact printers are further divided into following three types:-1. Dot Matrix Printers2. Line Printers3. Band Printers
Dot Matrix Printers:-
It creates image by print head which contains cluster of short pins arranged in one or more columns
Printers pushes pins or receiving signal from pc
Pins strike ribbon they press ink from ribbon onto paper
Pins are combination of characters
Pins are directly proportional to resolution
Line printers:-
it works like dot matrix printer
It doesn’t have large resolution capacity but has fastest speed
It uses a special wide print head that can print an entire line or text at one time
It can print 3000 lines per minute
Band Printers:-
It has rotating band exposed with alphanumeric characters
Machine rotates the band to desires character then a small hammer tapes the band, processing the character against ribbon
Band printers are very fast and very robust
Good quality band printer can print 2000 lines per minute depending on the character set used
Band printer:-Band printer:-
Non-impact printers:- Non impact printers are further divided into following two main types
1. Ink jet printers2. Laser printers
Ink jet printers:-
It creates image directly by spraying in through tiny nozzles
It can print 2 to 4 pages per minute
Low cost as compared to laser printer
Many ink jet printers use black cartridge and also separate cartridge for color printing
Color ink jets printers have four nozzles: cyan(blue), magenta(red), yellow, and black also referred to as CMYK
These four colors are almost in all color printings because it is possible to combine them to creat any image
Many ink jets can produce photo- quality images
They are often used to print pictures taken with a digital camera
Inkjet printer:-Inkjet printer:-
Laser printers:-
They are expensive but have higher print quality and faster
Laser can aim at a point on drum creating an electric charge
Toner composes of tiny particles of ink, sticks to drum with pressure and heat drum is transferred on to the paper
A color laser printer uses a single color model rather than four cartridges in ink jet printer
Single color(black) laser printers can produce between 4 to 16 pages per minute
They are more reliable and efficient than ink jet printers
Laser printer:-Laser printer:-