Jack, I think both you and wikipedia are saying the same thing just in different ways.
Direct copy/paste of the paragraph from wikipedia
Quote:
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When a large number of pixels are needed in a display, it is not technically possible to drive each directly since then each pixel would require independent electrodes. Instead, the display is multiplexed. In a multiplexed display, electrodes on one side of the display are grouped and wired together (typically in columns), and each group gets its own voltage source. On the other side, the electrodes are also grouped (typically in rows), with each group getting a voltage sink. The groups are designed so each pixel has a unique, unshared combination of source and sink. The electronics, or the software driving the electronics then turns on sinks in sequence, and drives sources for the pixels of each sink.
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I've found that wikipedia isn't usually wrong just not quite right most of the time. I never use them as my primary source for information, even in the
few cases I do look something up there.