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A dot matrix is a grid of dots used to form letters, numbers, and images on a computer screen or printout. The term can refer to the technique of forming characters with a pattern of dots, as well as specific devices that use this method, most notably the dot matrix printer. In printing, this involves tiny wires or hammers striking an inked ribbon to leave dots on paper, a method still used in applications like receipts and multi-part forms.

Description of the term

A pattern of dots: Fundamentally, a dot matrix is a way of representing data as a grid of dots, where the density and arrangement of these dots create a legible character or graphic.

An older printing method: The term is strongly associated with early computer printers. These printers use a print head with a set of pins or "hammers" that are fired in a sequence to create dots on paper through an inked ribbon.

Characterized by its quality: Early dot matrix printers often produced crude-looking text, but newer models with more pins (like 24-pin heads) created much higher quality output, comparable to a typewriter.

Still in use: While largely replaced by laser and inkjet printers, dot matrix technology continues to be used in specific applications where impact printing is required, such as for printing on multi-part forms, continuous-feed paper (fan-fold), and in devices like cash registers, ATMs, and some Point-of-Sale terminals.

A display technology: The concept is also the basis for many modern display technologies, including the pixels on your TV, phone, or computer monitor, though these are typically made of light-emitting diodes (LEDs) rather than being a physical impact method.