Introduction to I.T

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Introduction to I.T

  1. 1. In the Name of ALLAH ALMIGHTY Who is most Merciful, Gracious
  2. 2. First of all thanks to Allah Almighty who gave us the spirit to complete this task, which was given by Honorable ‘Sir Liaquat Hussain’ And thanks to my parents who supported me a lot for all of this. ACKNOWLEDGMENT
  3. 3. SUBJECT Introduction to IT. TOPIC Discuss briefly Printer, plotter, Monitor Group Members Wajahat Ali Ghulam (Group leader) Zille-Subhani, Afzaal Rashid, Asad Mehmood, Danish Asad ROLL NO s Class, Session 01, 15, 20, 27, 17. BBA (2010 – 2014) GROUP# 02, Institute FASK, FACULTY OF ADMINISTRATIVE SCIENCES KOTLI A.K UNIVERSITY OF AZAD JAMMU & KASHMIR PRESENTATION NO. 01
  4. 4. REFERENCES:- • IT series Book • Self-preparation SLIDES PREAPARED BY: Wajahat Ali Ghulam SLIDES PREPARATION
  5. 5. • In 1953, the first high-speed printer was developed by Remington-Rand for use on the Univac computer, while the first dot matrix printer was marketed by IBM. • In 1938, Chester Carlson invented a dry printing process called electro photography, commonly called a Xerox, the foundation technology for laser printers to come. • And day-by-day it is replaced the quality, size, etc HISTORY OF PRINTERS
  6. 6. • Printer is a type of a output device, that is used to produce output in the form of text and graphics on paper. PRINTER—A DEFINITION
  7. 7. ANCIENT PRINTER’S PICTURES
  8. 8. TODAY'S PRINTER OVERALL VIEW
  9. 9. • IMAGE QULAITY — Measured in (dpi). Most printers produce 300-600 dpi. • SPEED—Measured in pages per minute (PPM) or characters per second (CPS). PRINTER’S ACCURACY
  10. 10. Major types of printer (i) Impact printers (ii) Non-impact printers TYPES OF PRINTERS
  11. 11. (i). IMPACT PRINTERS This used to print the pages by striking pins against the paper like hammer (ii).NON-IMPACT PRINTERS This used to print the pages without striking pins against the paper. IMPACT PRINTERS & NON-IMPACT PRINTERS
  12. 12. TYPES OF IMPACT PRINTERS (i) DOT MATRIX PRINTERS (ii) DAISY WHEEL PRINTER DOT MATRIX PRINTERS • It makes hardcopy by printing one character at a time. • It uses “Pins” to print pages that are located on it’s “Print Head”. • It’s speed is 200 or 1000 characters per minute. • Low resolution, speed measure in ‘CPS’, character per second
  13. 13. DOT MATRIX PRINTER PICTURE
  14. 14. DAISY WHEEL PRINTER Low quality print. Daisy wheel printers are very similar to typewriters. Slow-printing. Prints the character by spikes that are located on the wheel.
  15. 15. DAISY WHEEL PRINTER MODEL
  16. 16. (i) LASER PRINTERS (ii) INKJET PRINTERS LASER PRINTERS:- • In this printer LASER beam is used to print image or text, graphics whatever something may be. • It also produce a high quality prints on paper. TYPES OF NON-IMPACT PRINTERS
  17. 17. INTERNAL LASER PRINTER MODEL
  18. 18. EXTERNAL VIEW OF LASER PRINTERS
  19. 19. • The printer sprays tiny droplets of ink onto the paper. • Color and black-and-white printing. • Speed offered by this is (2- 4)pages per minute. • Inexpensive, and low operating costs. INKJET PRINTERS
  20. 20. Inkjet printer's outlook
  21. 21. PLOTTER •A output device. •On high scale printing. •Architectural Maps •Sign Boards, Bill boards •Uses a variety of colors
  22. 22. PLOTTER'S PICTURE
  23. 23. • It is a type of output device • Only Softcopy out put. • Like T.V. • Monitor's Resolution • Diagonally Measured MONITOR, A BRIEF EXPLANATION
  24. 24. MONITOR’S OUTLOOK
  25. 25. • CRT (Cathode Rays Tube) • Flat-penal display. • LCD (Liquid crystal display) TYPES OF MONITORS
  26. 26. • CRT stands for Cathode Rays Tube. • In CRT monitors, electrons are fired at phosphor dots on the screen. • The dots are groped into pixels, which glow when struck by electrons. • In color CRTs, each pixel contains a RED, GREEN and BLUE dot. These glow at varying intensities to produce color images. CRT’s MONITORS
  27. 27. CRT cathode rays tube outlook.
  28. 28. • Most flat-panel monitors use liquid crystal display (LCD) technology. • Passive matrix LCD’s uses a transistor for each row and column of pixels. • Active matrix LCD uses transistor for each pixel on the screen. • Thin film transistor display multiple transistors for each pixel. Flat Panel Display
  29. 29. Flat Panel Display Outlook
  30. 30. • This type of display screens contains a substance called Liquid Crystal Display. • The molecules of this substance line up in such a way that the light behind the screens blocked or allows to create a image. LCD (Liquid Crystal Display)
  31. 31. LCD outlook
  32. 32. Comparison of Monitors • When Comparing monitors with each other Consider four features i. Size ii. Dot pitch iii. Resolution iv. Refresh Rate
  33. 33. • A monitor’s size is the diagonal measurement of its face, in inches • For years, 15” monitors (13” viewing area) were standard. • Today, 17” monitors (15” viewing area) are common. • Larger monitors are available, but can be expensive. SIZE OF MOINTORS
  34. 34. • Resolution is the number of pixels on the screen, expressed as a matrix (such as 600x800). • A 17” monitor offers resolution from 640x480 up to 1280x1024. • The video Graphics array (VGA) standard is 640x480. Super VGA (SVGA) monitors provide resolutions of 800x600, 1024x768 or higher. RESOLUTION
  35. 35. • The pixel (a word invented from "picture element") is the basic unit of programmable color on a computer display or in a computer image. What is A pixel?
  36. 36. • Refresh rate is the number of times each second that the electron guns scan the screen’s pixels. • Refresh rate is measured in Hertz (Hz). Or cycles per second. • A slower rate may cause eyestrain Refresh Rate
  37. 37. • Dot pitch is the distance between the phosphor dots that make up a single pixel. • In color monitors, three dots (RED, GREEN, BLUE (RGB), comprise each pixel. • Look for a dot pitch no greater than .28 millimeter. Dot pitch
  38. 38. A LOT OF THANKS Thanks to SIR LIAQUAT HUSSAIN. And then thanks to all my class fellows. For supporting us a lot for this presentation.

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