Name of presentation Company name Electrical Engineering Department 12 th Batch

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:-