The invention relates to an
LED lamp bulb with a novel structure. A main body is composed of a lamp holder and a glass
bulb shell, wherein a micro gas outlet and an
electric contact are arranged on the lamp holder; an electrifying guide wire and an LED power supply drive
assembly are arranged in the lamp holder; and a glass stem tube, an
electric light-emitting
assembly and a gas exhaust tube are arranged in the glass
bulb shell. The glass stem tube is in the shape of a long cylinder; a stem head with a gas
charge and discharge hole is arranged on the cylinder bottom; the gas exhaust tube is arranged on the center of a cylindrical cavity; and a ring cavity around the gas exhaust tube forms an
electric light-emitting
assembly mounting cavity which communicates with outside air. When the
electric light-emitting assembly works, part of generated heat and part of generated liquid are remained in an environment which communicates with outside natural air to immediately emit and evaporate, so that the radiating pressure of an inner cavity of the bulb shell is reduced,
corrosion influences, on an LED light-emitting element, of the remained liquid are avoided, the working service life and the illumination effect of the
LED lamp bulb can be ensured; and moreover, the
LED lamp bulb has the advantages of a simple and reasonable structure, reliable work, a long service life, low production cost and low daily use cost, and has very high practicability.