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Most of the seven-segment LED 5161BS are now shown in italics. In addition to 7 segment 5161BS LEDs, there are 14 and 16 additional oblique strokes on 5161BS display, but due to the drop in the price of dot matrix display (English: Dot-matrix), these "multi-strokes" have been basically replaced by the latter and need to have a constant working current. Constant current drive circuit can prevent short time current overload may cause permanent damage to the light emitting tube, so as to avoid large area damage of seven-segment LED 5161BS caused by current fault.
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