Abstract: A light emitting diode bulb comprises a heat sink, an insulator cover, a light emitting device package, a plurality of conductive terminals, a driving circuit, a holder, a metal screw thread, and an electrode. The light emitting device package, disposed between the insulator cover and heat sink, is covered by the insulator cover which exposes a portion of the light emitting device package. The conductive terminals are connected with the insulator cover and extend outwardly to be connected with the light emitting device package. The driving circuit converts an AC signal into a DC signal and includes upper conductive rods and lower conductive rods. The conductive rods are connected with the conductive terminals. The holder is connected with the metal screw thread and heat sink. The metal screw thread is connected electrically to one of the lower conductive rods. The electrode is connected electrically to the other lower conductive rods.

Abstract: A phosphor composition and a white light emitting device using the same are disclosed. The white light emitting device includes a blue light emitting diode and a phosphor composition disposed on the blue light emitting diode, wherein the phosphor composition includes a yellow lanthanum silicon nitride, a yellow ?-SiAlON and a red CaAlSiN, and the weight proportion of the yellow lanthanum silicon nitride, the yellow ?-SiAlON and the red CaAlSiN is 1:1:0.3˜0.45.

Abstract: A light emitting diode bulb comprises a heat sink, an insulator cover, a light emitting device package, a plurality of conductive terminals, a driving circuit, a holder, a metal screw thread, and an electrode. The light emitting device package, disposed between the insulator cover and heat sink, is covered by the insulator cover which exposes a portion of the light emitting device package. The conductive terminals are connected with the insulator cover and extend outwardly to be connected with the light emitting device package. The driving circuit converts an AC signal into a DC signal and includes upper conductive rods and lower conductive rods. The conductive rods are connected with the conductive terminals. The holder is connected with the metal screw thread and heat sink. The metal screw thread is connected electrically to one of the lower conductive rods. The electrode is connected electrically to the other lower conductive rods.

Abstract: Embodiments of a light emitting diode (LED) package structure are provided. In one aspect, an LED package structure includes a base, at least one LED chip, a blocking plate, and a transparent cover plate. The LED chip is disposed on and electrically coupled to the base. The blocking plate is disposed on the base and surrounds the LED chip. The blocking plate has an opening for exposing the LED chip. The blocking plate comprises a light-absorbing material that is opaque. The transparent cover plate is disposed on the blocking plate and covers the opening of the blocking plate.