U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

LED lighting device

Patent 8004211 Issued on August 23, 2011. Estimated Expiration Date: Icon_subject December 12, 2026. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Patent References

Luminous indicator with zero standby power
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Multicolored LED lighting method and apparatus
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Led light string employing series-parallel block coupling
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Circuit for interfacing between a conventional traffic signal conflict monitor and light emitting diodes replacing a conventional incandescent bulb in the signal
Patent #: 6150771
Issued on: 11/21/2000
Inventor: Perry

Multicolored LED lighting method and apparatus
Patent #: 6150774
Issued on: 11/21/2000
Inventor: Mueller, et al.

LED array having an active shunt arrangement
Patent #: 6153980
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Inventor: Marshall, et al.

Lighting entertainment system
Patent #: 6166496
Issued on: 12/26/2000
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Illumination components
Patent #: 6211626
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Power/data protocol
Patent #: 6292901
Issued on: 09/18/2001
Inventor: Lys, et al.

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Inventor

Assignee

Application

No. 12096926 filed on 12/12/2006

US Classes:

315/294Plural load device regulation

Examiners

Primary: Choi, Jacob Y
Assistant: Vu, Jimmy T

Foreign Patent References

  • 3832109 DE 03/01/1990
  • 0967590 EP 12/01/1999
  • 0991304 EP 04/01/2000
  • 1589519 EP 10/01/2005
  • WO 98/21918 WO 05/01/1998
  • WO 2004100612 WO 11/01/2004

International Class

H05B 41/36

Abstract

The present invention relates to a multiple LED driver circuit in which each LED (15, 17) is controlled by a bypass switch (19, 21). The LEDs are supplied by a switched mode power supply (8) and are connected to a constant current source to draw a predetermined current through the LEDs. The switched mode power supply is arranged to output different voltages depending on the number of switched-on LEDs. This is carried out by supplying the control signals (sw1, sw2) of the bypass switches to the switched mode power supply. In this way, the power dissipation of the constant current source can be kept at a low level.

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