Patent ID: 9093292
Filing Date: 2015-07-28
Classification: F21K,H01L

Abstract:
1. A light-emitting system comprising: a first power input terminal and a second power input terminal for receiving an AC power input to the light-emitting system; a first light-emitting-diode group comprising at least one light-emitting diode; a second light-emitting-diode group comprising at least one light-emitting diode; a first circuit path having at least one light-emitting diode from the first light-emitting-diode group and at least one light-emitting diode from the second light-emitting-diode group coupled serially, the first circuit path coupled between the first power input terminal and the second power input terminal, with a current of the AC power input flowing in a direction from the first power input terminal to the second power input terminal and the diodes of the first light-emitting-diode group and the second light-emitting-diode group emitting light during a positive power cycle; a third light-emitting-diode group comprising at least one light-emitting diode; a fourth light-emitting-diode group comprising at least one light-emitting diode; and a second circuit path having at least one light-emitting diode from the third light-emitting-diode group and at least one light-emitting diode from the fourth light-emitting-diode group coupled serially, the second circuit path coupled between the first power input terminal and the second power input terminal, with a current of the AC power input flowing in a direction from the second power input terminal to the first power input terminal and the light-emitting diodes of the third light-emitting-diode group and the fourth light-emitting-diode group emitting light during a negative power cycle, wherein the second light-emitting-diode group and the third light-emitting-diode group share at least one light-emitting common diode, wherein the first power input terminal, the second power input terminal, the first light-emitting-diode group, the second light-emitting-diode group, the first circuit path, the third light-emitting-diode group, the fourth light-emitting-diode group, and the second circuit path are formed in a single chip in the light-emitting system.