Computer Graphics and Multimedia Application: Q1.What is Hard Copy Technology? Explain the Hard Copy Devices? (Computer graphics and multimedia application All Notes)
The quality of the picture obtained from a device depends on dot size and the number of dot per inch, or lines per inch, that can be displayed. To produce smooth characters on printed text string, higher quality printers shift dot positions so that adjacent dots overlap.
Printers produce output by either impact or non-impact methods. Impact printers press formed character face against an inked ribbon unto paper. A line printer is an example of an impact printer (device). Non-impact printers and plotters use laser technology, ink-jet sprays, xerographics, electrostatic method and electro thermal method to get image onto paper.
Character impact printer often have a dot matrix paint head containing a rectangular array of protruding wire pin, with the number of pin depending on the quality of printer. Individual characters or graphics patterns are obtained by retracting certain pins so that remaining pin from the pattern to be printed.
In a laser device, a laser beam creates a charge distribution on a rotating drum coated with a photoelectrical matrial such as selenium. Toner is applied to the drum and then transferred to paper.
Ink-jet method produces output by filling ink in horizontal rows across a roll paper wrapped on a drum. The electrically charged ink stream is deflected by an electric field to produce dot matrix pattern.
An electrostatic device places a negative charge on the paper, one completed row at a time along the length of paper. Then, the paper is exposed to a toner. The toner is positively charged and so attracted to the negatively charged area where it adheres to produce specified output.
[ Topic= Hard Copy Devices in computer graphics ]
[ Topic= Hard Copy Devices in computer graphics ]
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[ Topic= Hard Copy Devices in computer graphics ]
[ Topic= Hard Copy Devices in computer graphics ]
Q1. What is Hard Copy Technology? Explain the Hard Copy Devices?
Ans. We can obtain hard-copy output for our data (text, image, etc) in several formats. For presentation, we can send image file to device that will produce 35 mm slides or transparencies. To put images on film, we can simply photograph a scene displayed on a video monitor. And we can put our pictures on paper by directing graphics output to a printer.The quality of the picture obtained from a device depends on dot size and the number of dot per inch, or lines per inch, that can be displayed. To produce smooth characters on printed text string, higher quality printers shift dot positions so that adjacent dots overlap.
Printers produce output by either impact or non-impact methods. Impact printers press formed character face against an inked ribbon unto paper. A line printer is an example of an impact printer (device). Non-impact printers and plotters use laser technology, ink-jet sprays, xerographics, electrostatic method and electro thermal method to get image onto paper.
Character impact printer often have a dot matrix paint head containing a rectangular array of protruding wire pin, with the number of pin depending on the quality of printer. Individual characters or graphics patterns are obtained by retracting certain pins so that remaining pin from the pattern to be printed.
In a laser device, a laser beam creates a charge distribution on a rotating drum coated with a photoelectrical matrial such as selenium. Toner is applied to the drum and then transferred to paper.
Ink-jet method produces output by filling ink in horizontal rows across a roll paper wrapped on a drum. The electrically charged ink stream is deflected by an electric field to produce dot matrix pattern.
An electrostatic device places a negative charge on the paper, one completed row at a time along the length of paper. Then, the paper is exposed to a toner. The toner is positively charged and so attracted to the negatively charged area where it adheres to produce specified output.
[ Topic= Hard Copy Devices in computer graphics ]
[ Topic= Hard Copy Devices in computer graphics ]
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[ Topic= Hard Copy Devices in computer graphics ]
[ Topic= Hard Copy Devices in computer graphics ]
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