You can have multiple rows of tiny stones on the band, or just one row of stones for a thin, delicate look. (creditdonkey.com)
In addition, the amount of energy needed to power multiple rows would make these displays bigger, heavier and less portable. (scientificamerican.com)
Finally, a two - dimensional array contains multiple rows or multiple columns (they can be thought of either way and are really the same thing). (financialcanadian.com)