The document discusses different types of hardcopy output devices, including impact printers like dot matrix printers and non-impact printers like inkjet and laser printers. It provides details on the working, speed, and quality of these printer types and compares factors such as image quality and cost. Additional output devices covered include all-in-one peripherals, high quality photo printers, and plotters.

2.  Hardcopy Output Devices
 Printers
 Types of Printers
 Impact Printers
 Nonimpact Printers
 Dot Matrix Printers
 Working of Dot Matrix Printers
 Speed
 Quality
 Inkjet Printers
 How does an inkjet printer work?
 Speed of inkjet printer
 Quality measures of inkjet printer

3.  Laser Printers
 Printing Process
 Speed of Laser Printer
 Quality measure of Laser Printer
 All in One Peripherals
 Comparison of Printers
 High Quality Printers
 Photo Printers
 Plotters

4.  Hardcopy: Hardcopy output is tangible and
refers to output which is printed.
Softcopy Devices Hardcopy
Devices
Monitors Printer
Projectors Plotter
Speakers
Video Graphics Card

5.  An external hardware device responsible for
taking computer data and generating a hard
copy of that data.
 Printers are one of the most commonly used
peripherals and they print text and still
images on the paper.

6.  The printer is computer output device that
accepts text and graphic as input, &
prints or illustrations on paper as a hard
copy in the form of documents etc.
 Printing is a process for reproducing text and
images typically with ink on paper.

7.  Many printers are primarily used as local
peripherals, and are attached by a printer cable
or, in most newer printers, a USB cable to a
computer which serves as a document source.
 In addition, a few modern printers can directly
interface to electronic media such as memory
card, or to image capture devices such as
digital camera.

8.  Printers can fall into two categories:
1. Impact printer: It produces text and images when
tiny wire pins on print head strike the ink ribbon
by physically contacting the paper.
 Examples: Dot matrix printer, Line printer, Daisy
wheel printer, Band printer.
2. Non-impact printer: It produces text and graphics
on paper without actually striking the paper.
 Examples: Inkjet, Laser printer.

9.  An impact printer
creates an image by
using pins or hammers to
press an inked ribbon
against the paper.
 Simplest impact printer
is a type writer which
uses small hammers
embossed with
characters or shapes

10.  Dot Matrix Printers are commonly used in
workplaces where physical impact with paper
is important
 A Dot matrix printer creates an image by
using a mechanism called a print head, which
contains a cluster or matrix of short pins
 The more pins that a print head contains, the
higher the resolution of the printers
resolution

11.  The lowest-resolution dot matrix printers
have only nine pins
 The highest-resolution printers have 24 pins

12.  Speed of Dot matrix printer is measured in
characters per second (cps)
 The slowest dot matrix printers create 50 to
70 characters per second
 The fastest Dot matrix printers print more
than 500 characters per second

13. Line printers
Band Printers

14.  A line printer is a special type of impact
printer
 IT uses a special wide print head that can
print an entire line of text at once
 Line printers have low resolution but are
incredibly fast
 It can print 3000 lines of text per minute

15.  A Band printer features a rotating band
embossed with alphanumeric characters
 To print a character, the machine rotates the
band to the desired character, then a small
hammer taps the band, pressing the
character against a ribbon
 Band printers can print 2000 lines of text per
minute

16.  Non impact printers use other means to
create an image
 For example Inkjet printers spray paint on
the paper to create an image on the paper

17.  Ink jet printers create an image directly on
the paper by spraying ink through tiny
nozzles
 Ink jet printers are cheapest non impact
printers

18.  Color ink jet printers have 4 ink nozzles i-e
Cyan (blue), Magenta (red), yellow and black
 The colors are some times referred as CMYK

19.  Laser printers are more expensive than Inkjet
printers, their print quality is higher
 A CPU and memory is built into the printer to
interpret the data and control the laser
 The quality and speed of laser printers make
them ideal for office environment

20.  Just as the electron
gun in a monitor can
target any pixel, the
laser in a laser printer
can aim at any point
on a drum, creating an
electrical charge
 Toner which is
composed of tiny
particles of ink, sticks
to the drum in the
places the laser has
charged

21.  Single color (Black) laser printers typically
can produce between 4 and 16 pages of text
a minute
 The most common laser printers have
resolutions of 300 or 600 dpi, both
horizontally and vertically
 Some High-end models have resolutions of
1200 or 1800 dpi

22.  Several printer makers now use ink jet or
laser printers as the basis for all-in-one
peripherals
 These devices combine printing capabilities
with scanning, photocopying and faxing etc
 All-in-one peripherals are available in black
and white and color models

23.  Image Quality
 Image quality, also known as printer resolution is
usually measured in dots per inch (dpi)
 More dots per inch a printer can produce the
higher its image quality
 Speed
 Printer speed is measured in the number of pages
per minute (ppm) the device can print
 Speed of dot matrix printers is measured in
characters per second (cps)

24.  Initial Cost
 The cost of new printers has fallen dramatically
in recent years
 It is possible to buy an average quality printer in
few thousand rupees
 Cost of Operation
 The cost of ink or toner and maintenance varies
with the type of printer

25.  These printers are often used by publishers
and small print shops to create high quality
output , especially color output

26.  With digital cameras and scanners becoming
increasingly popular, users want to create
photos instantly
 Many photo printers use ink jet technology
but a few use dye-sublimation technology

27.  Photo printers work
slowly, some can take
two to four minutes to
create a printout
 Several models create
prints no larger than a
standard 4 x 6-inch
snapshot
 Although newer photo
printers can produce 8
x 10-inch or 11 x 14-
inch prints

28.  Many Larger-format photo printers can
print multiple images on a single sheet of
paper

29.  A device that draws
pictures on paper
based on commands
from a computer.
 Plotters differ from
printers in that they
draw lines using a pen.
As a result, they can
produce continuous
lines

30.  Multicolor plotters use different-colored
pens to draw different colors.
 Plotters were the first type of printer that
could print with color and render graphics
and full-size engineering drawings