Welcome to our new lecture
In this lecture we will talk about Output devices
In the previous lecture we have talked about input devices
There we saw that
In input devices We saw some devices
Which we have not heard about
Which were most popular
Keyboard, mouse
If you ask someone about these devices
They will tell you that it is an input device
Other than that we saw
Joystick Light pen
Barcode reader
That is also an input device
Microphone is also an input device
Today in this lecture
We will see
What is an output device
In input device
You give data
Then that data
Is processed and then
Through output devices
You can hear and see
In output device
We will see what all things
We will get to see
About which things we already knew
That we can call it an output device
About which things we will get to know
That this is also an output device I was using this
But I did not know that
We can put it in the output device category
So let's open the whiteboard
And there
By taking reference of the book
Let's try to understand
What are input devices
So that you Can recognize
Any device
That this is an input device
This is an output device
How will you be able to tell When you will be able to tell
the difference between the two Input device is read
Output device is going to be read I open the whiteboard
And This is our computer output devices
So here
Following are few of the
Important output devices These are some of the
Output devices which are very important
Which are used in computer
Like monitor
Monitor is
An important
Output device
Graphic plotter
Printer Among these three You must know about monitor and
printer Whenever you go to a photography shop There is a
printer
Or you will get to see it in normal houses
You will get to see it in school colleges
So printer
We know it is an output device We have seen it
Monitor screen
Screen of mobile phone
Screen of computer What is it? It is our output device
It is called monitor
So let's try to know about monitor Monitor What is it? What
is exactly monitor?
I know it is a screen
What else is there in it?
Which we can read
So let's see here
Monitors commonly called as
Visual display units Means Monitors commonly
What is it? It has another name
It is visual display unit
Means It is a unit which can display things Main output
device of a computer
Means Main output device of a computer
It is your display
It is your monitor
Your main
Important Input device of a computer
Main component is your keyboard
It is your mouse
What will you do with keyboard?
Whatever you have to type
Whatever data you have to give
You can give it easily
What will you do with mouse?
You can move cursor
You can point out something
So your keyboard And your mouse Became an important input
device
Monitor became
Important main output device
What does it form?
It forms images From tiny dots Means Our monitor
How does it produce images?
With the help of tiny dots
And what do you call these tiny dots?
You call them pixels
That are arranged in a
Rectangular form
Because they are arranged in a rectangular form
Now we will talk about it
The sharpness of the image
Depends upon the number of pixels
Means How sharp image you will see
How good image you will see
It will depend upon
Your pixels
Let's try to understand it
Suppose I have a monitor
Ok I have a monitor
Or you can call it a screen
Now it will be applied
On every screen
Ok You must have seen
In 1920x1080
Resolution Of every screen
Ok What does it mean?
It means that 1920 pixels
Can come like this
Like this
Horizontally 1080 pixels
Can come vertically
So Pixels are the smallest unit
Of any image
Like this is our pixel
Ok What can this pixel do?
It can produce 3 colors
Red Green Blue And The intensity of
Red color
Is 0 to 255
Same Green color intensity
Means As you increase or decrease the intensity
You will see shades in your colors
Here The intensity of green color
Is 0 to 255 Same with blue color 0 to 255
Now here In your square Rectangular shape
It is arranged like this
One pixel is here
These pixels are Adjacent to each other
Like this
Let me do it
Like this
And These pixels
Create an image Like this
Here also
You can see 3 colors
Green Blue Here If you want to see a sharp image
You have to keep more number of pixels
Like This is my Screen This is a mobile phone screen
If I
Keep 6 pixels
Like this
I can see Sharp image
Or Same mobile phone screen
If I keep More number of pixels
Like this
I can see Sharp image
Like this
Let me show you
Let's go to Internet Connection
And here
Super Mario Game In this
You can see This character
In this
Character One second
Let's see
Can we get another one
No Let's elaborate it
Mario Game Character In pixels
Or You can see
One pixel
Or Snake Game
Nokia 1100
In this way
This pixel
Creates an image
Now Let me show you
If I
This This image
Mario Game
Character In more pixels
In higher number of pixels
This image
You can see
Because we have kept more number of pixels
More number of pixels
You can see
In this device
You can see
But if you keep less number of pixels
You can see
This is the screen of the monitor
The image
Which is produced
Is from pixels
And the size of the pixel is rectangular
Which can produce three colors
Red color
Can produce green color and blue color and also we have
seen that intensity of RGB colors is from 0 to 255
intensity of RGB colors is from 0 to 255
now lets see there are two kinds of viewing screens used
for monitor monitor which you can see today it has two
types of screens now what are those two types of screens?
one is cathode ray tube and the other is flat panel display
now lets understand what
is this? first of all lets see cathode ray tube monitors
there were some monitors which had this technology cathode
ray tube technology the CRT display is made up of small
picture element called pixels the smaller the pixels the
better is the pixels the
better is the image clarity and resolution the smaller the
pixels the better is the image clarity if you reduce the
size of pixels and increase the number of pixels then you
will get better image it takes more than one illuminated
pixels to form whole
character it takes more than one illuminated pixels to form
whole character such letters in the word HELP
a finite number of characters can be displayed on a screen
a specific number of characters can be displayed on a
screen a finite number of characters can be displayed on a
screen
The screen can be divided into a series of character boxes
or the screen can be divided into a series of character
boxes or the screen can be divided into a series of
character boxes or the screen can be divided into a series
of character boxes or the
screen can be divided into a series of character boxes or
the screen can be divided into a series of character boxes
or the screen can be divided into a series of character
boxes or the screen can be divided into a series of
character boxes or the screen
can be divided into a series of character boxes or the
screen can be divided into a series of character boxes or
the screen can be divided into a series of character boxes
or the screen can be divided into a series of character
boxes or the screen can
be divided into a series of character boxes or the screen
can be divided into a series of character boxes or the
screen can be divided into a series of character boxes or
the screen can be divided into a series of character boxes
or the screen can be
divided into a series of character boxes or the screen can
be divided into a series of character boxes or the screen
can be divided into a series of character boxes or the
screen can be divided into a series of character boxes or
the screen can be divided
into a series of character boxes or the screen can be
divided into a series of character boxes or the screen can
be divided into a series of character boxes or the screen
can be divided into a series of character boxes or the
screen can be divided into
a series of character boxes or the screen can be divided
into a series of character boxes or the screen can be
divided into a series of character boxes or the screen can
be divided into a series of character boxes or the screen
can be divided into a series
of character boxes or the screen can be divided into a
series of character boxes or the screen can be divided into
a series of character boxes or the screen can be divided
into a series of character boxes or the screen can be
divided into a series of
character boxes or the screen can be divided into a series
of character boxes or the screen can be divided into a
series of character boxes or the screen can be divided into
a series of character boxes or the screen can be divided
into a series of character
boxes or the screen can be divided into a series of
character boxes or the screen can be divided into a series
of character boxes or the screen can be divided into a
series of character boxes or the screen can be divided into
a series of character boxes
or the screen can be divided into a series of character
boxes or the screen can be divided into a series of
character boxes or the screen can be divided into a series
of character boxes or the screen can be divided into a
series of character boxes or
the screen can be divided into a series of character boxes
or the screen can be divided into a series of character
boxes or the screen can be divided into a series of
character boxes or the screen can be divided into a series
of character boxes or the
screen can be divided into a series of character boxes
or the screen can be divided into a series of character
boxes or the screen can be divided
into a series of character boxes or the screen can be
divided into a series of character boxes or the screen can
be divided into a series of character boxes or the screen
can be divided into a series of character boxes or the
screen can be divided into
a series of character boxes or the screen can be divided
into a series of character boxes or the screen can be
divided into a series of character boxes or the screen can
be divided into a series of character boxes or the screen
can be divided into a series
of character boxes or the screen can be divided into a
series of character boxes or the screen can be divided into
a series of character boxes or the screen can be divided
into a series of character boxes or the screen can be
divided into a series of
character boxes or the screen can be divided into a series
of character boxes or the screen can be divided into a
series of character boxes or the screen can be divided into
a series of character boxes or the screen can be divided
into a series of character
boxes or the screen can be divided into a series of
character boxes or the screen can be divided into a series
of character boxes or the screen can be divided into a
series of character boxes or the screen can be divided into
a series of character boxes
or the screen can be divided into a series
you write Rahul live in Faridabad so you wrote the whole
line understood there you write the characters so it looks
like this there are two types drum printer and chain
printer now what are these what is drum printer and chain
printer just tell me so
let's see the drum printer the printer is like a drum in
shape do we have the image of this we don't have the image
of this why we don't have let's see let's try to find the
image of this once drum printer how it looks so we removed
it from here we wrote
drum printer so it looks like this it looks like a drum so
we removed it so it looks like a drum let's see the next
one how it looks let's see so you can remember the things
visually chain printer it looks like a chain it looks like
this this is your
chain printer this is your chain printer let's see the
printer is like a drum in shape so you will know it looks
like a drum so we call it drum printer it's very good the
surface of drum is divided into number of tracks means the
surface of drum what
is that it is divided into number of tracks total tracks
are equal to size of paper and all the tracks whatever size
of paper you want to put
A4 size, A3 size it is equal to that paper width of 132
character means width of paper can have 132 characters drum
will have 132 tracks what is said? it is said that whatever
will be your surface and size of paper total tracks means
132 tracks so how
many characters you can put means 132 characters you can
put if your tracks is 132 character set is imposed on track
and character set that is imposed on track the different
character sets available in the market are 48 character
set, 64, 96 character
set means some set of characters comes now in that
character set if you try to write any character of any
other language then you will not be able to write that's
why what happens today is that unique code system is used
in which you can write any character
any letter so here the character set is 48, 64, 96 one
rotation of drum print one line one rotation one line
second rotation second line third rotation third line drum
printers are fast in speed 3000 lines per minute do you
understand means how many he
can roll in one minute 300 times to 2000 lines advantage is
very high speed because from here only you will know that
in one minute if you can print so many lines then high
speed will be high after that disadvantages disadvantages
are very expensive characters
font can not be changed font of character you can not
change the way they are written they will always be written
let's talk about chain printers in this printers chain of
character sets are used so it is called chain printers what
we said chain of characters
just now we saw image standard character set 48 same thing
like there how was your character set 64, 96 you can see
here advantages are character fonts can easily be changed
if you can not change there then here you can change
different languages can
be used with the same printers means now I told you that
language is a mess here you can use different languages
disadvantages are if you cut this then sound will come non
impact printers what is this let's see are non impact
printers better than impact
printers non impact printers print the character without
using ribbon means they do not use ribbon ribbon is a kind
of ribbon on which you do things these printers print a
complete page at a time they are also called page printers
see you have impact
printers you have non impact printers what you can do in
impact printers what you can do you can print character by
character you can print line by line means you have to
rotate the drum you have to rotate the drum 3rd time, 4th
time when you can say
one line is printed it can be in one page 40-50 lines our
non impact printer prints the whole page at a time so which
printer you want to buy simple thing we want to buy non
impact printer so we understood these printers print a
complete page what is
called page printer if someone asks you what is page
printer then don't get confused non impact printers are
called page printers
in
this
video.