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The light flux (V) and the IF curve, therefore, using a constant current source driver can better control the brightness. In addition, the positive pressure drop of LED has a large range (up to 1V or more). According to the vf-if curve in the figure above, a small change in VF will cause a large change in IF, which will cause a big change in brightness.

Blue 7 Segment Display LED 7-Segment 5.0" 5 inch 1-Digit Single Common Anode CA 5inch
Red Ultra Bright LED 7 Segment Display 0.52 inch Single Digit Common Anode CA
Orange Seven Segment LED Display 0.43 inch 0.43" Dual Digit 2 Common Anode
Yellow Green LED 7 Segment 0.80-inch 0.8" 1 Digit Single Display Common Cathode CC
Yellow 8x8 LED Display Dot Matrix 1.9mm Diameter 0.8 inch CA CC
White 7seg Display Seven Segment LED 0.36 inch 1 Digit Single CA CC
Yellow LED Seven Segment Display 0.39" Three Digit 3 Common Cathode CC
Blue 7 Segment Display LED 7-Segment 0.56" 4-Digit Four Common Anode CA
Yellow LED Seven Segment Display 0.31" Three Digit 3 Common Cathode CC
Orange Seven Segment LED Display 0.50inch Single Digit 1Digit 0.5 Common Anode CA

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