1st Year chapter 1 Printer.pptx Topic: Printers and Types. First Year Computer Science. Important Long questions related to computer science subject. Included Types are Impact and Non Impact printers. Impact printer: Dot Matrix printer, Daisy Wheel printer and Line Printer Non Impact: Laser printer, Ink Jet printer and Thermal Printer all the required information is included for the competitive exams and final board examinations.

1. Printer
Printer and Types
& Memory Units

2. Printer
• A printer is a peripheral device that produces a Hardcopy
of digital documents or images on paper or other
printable materials.
• Printers are commonly used in offices, homes, and
businesses to generate hard copies of documents, images,
graphics, and more.
• Printers can vary in technology, speed, quality, and
functionality.

3. Properties of Printer
• Color: Printer can print in single or multiple colors.
• Resolution: The quality of printer is measured in DOTS
PER INCHES (dpi).
• Speed: The speed of the printer can be measured in:
• Character per Seconds (CPS)
• Line per minute (LPM)
• Page per minute (PPM)

4. Types of Printer
Printer
Impact
Non
Impact

5. Impact printers
• An impact printer is a type of printer that produces
characters or images by physically striking an inked
ribbon against the printing surface.
• Properties:
• Produces noise during operation.
• Typically slower compared to non-impact printers.
• Can create carbon copies.
• Inexpensive: recommended when cheap printing is required.

6. Impact Printer
Impact
Printer
Dot Matrix
Printer
Daisy Wheel
Printer
Line Printer

7. Dot Matrix Printer
• A type of impact printer
• Known as character printer.
• A dot matrix printer is an impact printer that forms
characters and images using a grid of tiny pins that strike
an inked ribbon, creating dots.
• Speed is measured in Character per Second.
• 30 to 1550 characters per second
• 60 to 90 DPI, the lowest printing quality
• Can have 9 to 24 pins

8. Working of Dot Matrix
• A dot matrix printer consists of a print head with a matrix
of pins.
• When you send a print job, the pins strike an inked
ribbon, creating dots on the paper.
• By precisely controlling which pins strike and the pattern
they follow, characters and images are formed.
• The pins impact the paper through an inked ribbon, and
each pin corresponds to a dot in the matrix, hence the
name "dot matrix." Characters and images are created by
combinations of dots.

10. Daisy Wheel Printer
• In a daisy wheel printer, a rotating wheel with characters or
symbols.
• When a character needs to be printed, the wheel rotates to the
desired character position.
• The selected character is then pressed against an inked ribbon,
transferring ink to the paper.
• This process is repeated for each character in the document,
with the wheel rotating and striking the paper as needed.
• It is slower than dot matrix.
• Its quality is better than dot matrix

11. Print Wheel

12. Line Printer
• A type of impact printer
• Can print a whole Line at a time
• Its speed is higher than dot matrix
• Can print 300 lines in one minute
• Its speed is measured in LPM (Line Per Minute)

13. Non Impact Printer
• Non-impact printers do not physically strike the paper to
create images but use other technologies to apply ink or
toner.
• Preferred for high-quality printing in offices, homes, and
businesses.
• Faster than impact printer
• Do not make noise while printing
• High printing quality
• Expensive than impact printer.

14. Non Impact Printer
Non Impact
Printer
Laser Printer
Ink Jet
Printer
Thermal
Printer

15. Laser Printer
• LASER stands for Light Amplification by Simulated
Emission of Radiation
• It uses laser beam and toner filled with special powder for
printing.
• Uses special type of paper.
• It prints a whole paper at a time, therefore it is also
known as page printer.
• Can print 5 to 35 pages per minute
• Can print upto 1200 DPI resolution.

17. INK JET Printer
• An inkjet printer operates by spraying tiny droplets of
liquid ink onto paper.
• These droplets are controlled by electronic signals.
• The ink is heated or forced through the nozzles, resulting
in the ejection of ink droplets.
• The combination of controlled droplet placement and ink
colors produces the printed output on the paper.

18. Ink Jet Printer

19. Thermal Printer
• A thermal printer uses heat to transfer ink onto thermal
paper
• Uses special Waxed Paper.
• Sometimes uses Heated Pins to produce printing.

21. QUIZ
The speed of LASER printer is measured in:
(A) Page per minute (B) Line per minute (C) Character per mint (D) All
Which of the following printer is operates most like a photocopy machine?
(A) Line printer (B) Laser Printer (C) Ink-Jet Printer (D) None
Which of the following printer is NOT an impact printer?
(A) Dot matrix (B) Daisy wheel (C) Laser (D) Line
The output of the Printer is called:
(A) Program (B) Soft copy (C) Hard copy (D) Hardware

22. Memory Units
S.No. Unit & Description No. of Bytes
1
1 Bit: Smallest unit
Either 0 or 1
2
Byte (B)
1 B = 8 Bits
3
Kilobyte (KB)
1 KB = 1024 Bytes
210 Bytes
4
Megabyte (MB)
1 MB = 1024 KB
220 Bytes
5
GigaByte (GB)
1 GB = 1024 MB
230 Bytes
6
TeraByte (TB)
1 TB = 1024 GB
240 Bytes
8
PetaByte (PB)
1 PB = 1024 TB
250 Bytes