MGMT 1050 Lecture Notes - Lecture 4: Inkjet Technology, Inkjet Printing

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MGMT 1050 Tutorial 4 Notes Printers
Introduction
The brightness of a pixel is determined by the amount of current supplied by the
transistor, which in turn is determined by an input signal indicating the desired level of
brightness.
The simplicity of the panel, combined with the lack of need for a backlight, result in the
thinness of the panel.
Sony and Samsung have both demonstrated OLED panels less than 3mm thick.
Earlier printers were derived from typewriters.
They used formed characters that were mounted at the ends of arms, on wheels shaped
like a daisy, on chains, or on spheres.
Printing resulted from the hammer-like physical impact of the character through an
inked ribbon onto paper.
These printers were difficult to maintain and were incapable of generating any character
Graphical image that was not provided in the set of formed characters.
Later impact printers used pins that were selectively employed to generate dot matrix
representations of the characters on the page.
These printers were known as dot matrix printers
In addition to the standard characters, they were also capable of printing simple
geometric shapes.
Impact printers have mostly disappeared from use.
Except for some commercial printing of items such as books, magazines, and
newspapers, nearly all modern printing is done using nonimpact technologies.
This is true regardless of the size of the system, the quantity of printing, or the capacity
of the printer.
Single-color (usually black and white) printers normally use laser, or inkjet printing
technology. Low-cost color printing also uses inkjet technology.
Combined with the lack of need for a backlight, result in the thinness of the panel.
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