AC LIGHT EMITTING DEVICE WITH LONG-PERSISTENT PHOSPHOR AND LIGHT EMITTING DEVICE MODULE HAVING THE SAME

摘要

An AC light emitting device includes a first light emitting diode chip and a second light emitting diode chip, each of which has a plurality of light emitting cells on a single substrate. A first long-persistent phosphor is positioned on the first light emitting diode chip to perform wavelength conversion for a portion of light emitted from the first light emitting diode chip, and a second long-persistent phosphor is positioned on the second light emitting diode chip to perform wavelength conversion for a portion of light emitted from the second light emitting diode chip. The afterglow luminescence period of the second long-persistent phosphor is different from that of the first long-persistent phosphor.

主权项

1. An alternating current (AC) light emitting device, comprising:
a first light emitting diode chip; a second light emitting diode chip, each of the first light emitting diode chip and the second light emitting diode chip comprising light emitting cells; s a first long-persistent phosphor disposed on the first light emitting diode chip and configured to change a wavelength of light emitted from the first light emitting diode chip; a second long-persistent phosphor disposed on the second light emitting diode chip and configured to change a wavelength of light emitted from the second light emitting diode chip; a first lead terminal; and a second lead terminal, wherein the first light emitting diode chip on which the first phosphor is disposed and the second light emitting diode chip on which the second phosphor is disposed are configured to be driven together by a single AC power electrically connected to the first and second lead terminals, wherein a first afterglow luminescence period of the second long-persistent phosphor is different from a second afterglow luminance period of the first long-persistent phosphor, wherein the first long-persistent phosphor and the second long-persistent phosphor comprise different materials, and wherein the amount of the second long-persistent phosphor is different than the amount of the first long-persistent phosphor.