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