Revision 3 updated
- 1. HARD COPY DEVICES NEHRUREVATHY DEPARTMENT OF BCA 1
- 2. HARD COPY DEVICES • Also called as output device. • Output Device: Following are Output Devices: 1.Printers 2.Plotters PRINTERS: • Used to print data on paper • Types of printers: 2
- 4. 1.IMPACT PRINTERS: • Impact Printers: The printers that print the characters by striking against the ribbon and onto the papers are known as Impact Printers. • These Printers are of two types: 1. Character Printers 2. Line Printers 4
- 5. Character Printer Type-Dot Matrix Printers: • Dot matrix has printed in the form of dots. • Also called as serial printer or character printer. prints one character at a time • Two Modes: ON MODE: Release all the OFF MODE:Hold all the seven pins Seven needle to print a inside the print head. Character onto the paper. 5
- 6. Print Head: • Produce an image or character on a paper using seven pins called print head that hits the paper. • It consists of columns of small seven needles,each needle can move freely • Each needle can be handled by hammer action. • Uses of Hammer Action: It is used to force the needle to come out and print the character onto the paper. 6
- 7. • Standard characters are produced by 5* 7 dot matrix • It has 18 needles,9 needles,24 needles and 7 needles. 7
- 8. PRINT HEAD 8
- 9. Advantages & Disadvantages: Advantages: • Text can be printed • Low cost • Multiple copies are possible Disadvantages: • Very slow operation • Quality of image printing is poor 9
- 10. Line Printer Type -DrumPrinters: • These are line printers, which prints one line at a time. • It consists of a drum. • The shape of the drum is cylindrical. The drum is solid and has characters embossed on it in the form of vertical bands. • The characters are in circular form. • Each band consistsof some characters. Each line on drum consists of 132 characters. • Because there are 96 lines so total characters are (132 * 95) = 12, 672. • Drum contains a number of hammers also. 10
- 11. Line Printer Type -Chain Printers: • used to print one line at a line. • Basically, chain consists of links. • Each link contains one character. • Printers can follow any character set style, i.e., 48, 64 or 96 characters. • Printer consists of a number of hammers also. 11
- 12. CHAIN PRINTER AND DRUM PRINTER 12
- 13. Advantages & Disadvantages-Line printers: • Advantages: ❖Chain or Band if damaged can be changed easily. ❖It allows printing of different form. ❖Different Scripts can be printed using this printer. • Disadvantages: ❖It cannot print charts and graphs. ❖It cannot print characters of any shape. ❖Chain Printers is impact printer, hammer strikes so it is noisy 13
- 14. NON-IMPACT PRINTERS: 2. Non-Impact Printers: • The printers that print the characters without striking against the ribbon and onto the papers are called Non-Impact Printers. • print a complete page at a time, therefore, also known as Page Printers. • Page Printers are of two types: 1. Laser Printers 2. Inkjet Printers 14
- 15. LASERPRINTER • Non-impact page printers. • use laser lights to produces the dots needed to form the characters to be printed on a page. • It is made up of selenium,that drum contain the electric charged to expose the light. 15
- 16. LASERPRINTER 16
- 17. The output is generated in the following steps: • Step1:The drum is initially charged before exposing the laser beam or light • Step2: A laser beam is used to scan the drum by using mirror. • Step3:after scanning that drum,character of images is to be printed onto the drum. • Step4:The toner is spread over the surface to forms a ink image • Step5:The image of the drum is transferred to the paper and made permanent by heating. • Step6:The drum rotates back to the cleaner where a rubber blade cleans off the excess ink & prepares the drum to print the next page. 17
- 18. Advantages & Disadvantages: • Advantages: ❖ Quality of printing is good ❖ High speed • Disadvantages: ❖ High cost ❖ Multiple copies are not possible 18
- 19. INKJET PRINTER • Forms the character by spraying a small ink droplets on the paper • The output is generated in the following steps: # The ink from the tank is pumped through the nozzle or hole. # Then the drop is guided to proper position to form a character on the paper by electrically charged deflection plate. # Then the drop is not necessary for a particular character,it is placed in recycle ink tank. # Later send back to ink tank. • It is used to take 2 to 4 pages per minutes. 19
- 21. Advantages & Disadvantages: Advantages: • Color specification CYMK • High quality of printing • Low cost • Color printing is possible Disadvantages: • slow speed • Multiple copies are not possible 21
- 22. ELECTROSTATIC PRINTER • It is positive charge. • Toner is negative charge. Produce output on the paper. • Place a negative charge on the paper,then paper is exposed with toner. • Toner is positive charge. It has RGB color mode . 22
- 23. ELECTROSTATIC PRINTER • Apply the color for the specified image by using the rotating mirror • It attracts the –ve charge area . • finally it produce image on the paper. 23
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- 26. ELECTROTHERMAL PRINTER • Use heat in a print head to produce o/p pattern by using the heat sensitive paper . • Uses black and other color . 26
- 27. PLOTTERS • Plotters are a special type of output device. • It is suitable for applications: • Architectural plan of the building. • CAD applications like the design of mechanical componentsof aircraft. • Many engineering applications. 27
- 28. PLOTTERS 28 • Types of Plotters: 1.Drum Plotter 2.Flatbed Plotter
- 29. 1.DrumPlotter • It consists of a drum. • Paper on which design is made is kept on the drum. • The drum can rotate in both directions. • Plotters comprised of one or more pen and penholders. • The holders are mounted perpendicular to drum surface. • The pens are kept in the holder, which can move left to the right as well as right to the left. • The graph plotting program controls the movement of pen and drum. 29
- 30. Drum Plotter 30
- 31. 2.Flatbed Plotter • It is used to draw complex design and graphs, charts. • The Flatbed plotter can be kept over the table. • The plotter consists of pen and holder. The pen can draw characters of various sizes. • There can be one or more pens and pen holding mechanism. • Each pen has ink of different color. • Different colors help to produce multicolor design of document. 31
- 33. FLATBED PLOTTER • It is used to draw ❑Cars ❑Ships ❑Airplanes ❑Shoe and dress designing ❑Road and highway design 33
- 35. GRAPHICS SOFTWARE • There are two types of Graphics Software. 1. General Purpose Packages: • Basic Functions in a general package include: 1. for generating picture components (straight lines, polygons, circles and other figures) 2.setting color and intensity values, selecting views, and applying transformations. • Example of general purpose package :I GL (Graphics Library), GKS, PHIGS, PHIGS+ etc. 35
- 36. GRAPHICS SOFTWARE 2. Special Purpose Packages: These packages are designed for non programmers, so that these users can use the graphics packages, without knowing the inner details. • Example of special purpose package is ❖Painting programs ❖Package used for business purpose ❖Package used for medical systems. ❖CAD packages 36
- 37. THANK YOU 37