Abstract: An LED lamp set and a lighting bulb used thereon are provided. The LED lamp set comprises a plurality of circuit boards, a support post, an ignition circuit and two conducting wires. The circuit boards are spaced from each other in a parallel manner and mounted on the support post in series. Each of the circuit boards is connected to a plurality of LEDs surrounding the support post. The LEDs have a plurality of light emission surfaces tilted outwards. The ignition circuit receives an input power and transforms the input power to an ignition power. The two conducting wires have one end connected to the ignition circuit and linked to the circuit boards in series to ignite the LEDs. The LED lamp set further is coupled with a socket and a lamp shade to form a profile of a lighting bulb compatible to the socket of the ordinary lighting bulbs.

Abstract: A method for manufacturing lamp shell to improve structural strength and light penetration includes steps of: providing a plastic material, injecting the plastic material into a injection molding equipment to form a preform containing a first space with an opening and a connecting section at one end and a closed another end to form a light penetrating section, and placing the preform in a blow molding equipment and blowing the plastic material by injecting gas to inflate the preform through gas pressure to form a second space at a greater size than the first space to become a lamp shell. The lamp shell thus formed has a greater structural strength to meet safety requirements, and also provides improved light penetration, and can reduce material consumption of the lamp shell to save production cost.

Abstract: An LED driving circuit to provide DC power to an LED to generate light includes a voltage-lowering regulation circuit, a rectification circuit and a filter and current-limiting circuit. The voltage-lowering regulation circuit aims to regulate impedance and provide a back electromotive force with polarity opposite to input voltage so that input power passed through the voltage-lowering regulation circuit is offset by the back electromotive force to a lower voltage. Then the input power passes through the rectification circuit to become DC power. The filter and current-limiting circuit receives the DC power and has at least one filter element to absorb or release the voltage to perform filtering and at least one current-limiting resistor to limit DC value. Therefore, the DC power has a steady voltage and current to energize the LED for lighting.