Filament structure and bulb having the filament structure

A bulb, comprising a filament structure, a lamp holder and a lamp post arranged on the lamp holder, the lamp post being connected to a positive and negative lead, and the bulb comprising at least one filament structure, characterized in that:

• the positive and negative lead is connected to at least one filament structure;
• and
• a light-transmitting lamp body is provided to house the lamp post and at least three filament substrates;
• the filament structure comprising at least three filament substrates,
• each of the at least three filament substrates has a first end and a second end which are spaced apart from each other;
• sections between the first ends and the second ends of the at least three filament substrates extend and wind around an axis respectively;
• and
• an angle at which the sections of the at least three filament substrates between the first ends and the second ends are wound around the axis is not greater than 720 degrees.