A segmented display is an area with shaped elemts than can turn on or off independently, which allows it to display various shapes. The most common one is the seven segment display, which started to appear in the 70s to display numbers, and is still all around us today, more than you may realize. The seven segment design has actually been invented several times by different people. It's like the invention of the wheel - the most logical solution to a problem. The earliest known document is this patent from Carl Kingsley, filed in 1903; it's one of several patents of the era that used segments to increase telegraph speeds. The patent focuses on the mechanics; the segmented design is hardly mentioned. But who knows, perhaps someone designed it before digits even existed - by dropping some sticks, for example. Let's call this design the double square.
(This is all directly copied from and none of it is mine)
(This is all directly copied from and none of it is mine)
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