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LIGHT-EMITTING SYSTEMS

  • US 20110038156A1
  • Filed: 10/29/2010
  • Published: 02/17/2011
  • Est. Priority Date: 10/07/2005
  • Status: Active Grant
First Claim
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1. A light-emitting system comprising:

  • a first power input terminal and a second power input terminal for receiving an external 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 diode from the first light-emitting-diode group and at least one 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 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 diode from the third light-emitting-diode group and at least one 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 flowing in a direction from the second power input terminal to the first power input terminal and the 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 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 belong to a single chip light-emitting system.

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