Blade assembly and fan display having the same

A blade assembly, comprising:

• a circuit substrate;
• a lamination board;
• and
• a plurality of light emitting diode (LED) light emitting units;
• wherein the circuit substrate and the lamination board each have an elongated shape, and are bonded to each other by a laminating glue;
• a mounting hole is defined in the lamination board and passes through a thickness of the lamination board;
• the circuit substrate comprises a first side attached to the lamination board, the first side and the mounting hole jointly defining a mounting cavity;
• and the plurality of LED light emitting units are hermetically arranged in the mounting cavity and are arranged at intervals along a length of the circuit substrate,
• wherein the plurality of LED light emitting units are each a red-green-blue (RGB) light emitting unit, and the RGB light emitting unit comprises a first chip, a second chip, and a third chip that are arranged at intervals, and
• wherein each of the first chip, the second chip and the third chip is rectangular and has a length direction is consistent with a width direction of the circuit substrate.