AC light emitting diode and AC LED drive methods and apparatus

• US 8,531,118 B2
• Filed: 04/02/2012
• Issued: 09/10/2013
• Est. Priority Date: 02/25/2004
• Status: Active Grant

• Current Assignee: Lynk Labs, Inc.
• Original Assignee: Lynk Labs, Inc.
• Inventors: Miskin, Michael, Andersen, James N.
• Primary Examiner(s): VU, DAVID HUNG
• Application Number:
  US13/437,832
• Publication Number:
  US 20120242239A1
• Time in Patent Office: 526 Days
• Field of Search: 315/291, 315/187, 315/192, 315/185.R, 315/210, 315/224, 315/226, 315/225
• US Class Current: 315/185.R
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/0002 Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
• CPC Class Codes: H05B 45/382 with galvanic isolation between input and output
• CPC Class Codes: H05B 45/39 Circuits containing inverter bridges
• CPC Class Codes: H05B 45/42 Antiparallel configurations

Abstract

An LED device for use with an AC voltage power source configured such that at least one LED emits light during a positive phase of power provided from an AC power supply and at least one LED emits light during the negative phase of power provided from an AC power supply. The LED device includes a first power connection lead and a second power connection lead, both leads capable of being connected to and receiving power from an AC power supply.

Claims

1. A lighting system comprising:

at least one LED circuit having at least one LED, the at least one LED circuit being capable of emitting light during both a positive phase and a negative phase of an AC power supply;

a driver connected to the least one LED circuit, the driver providing AC voltage and current to the at least one LED circuit, the driver having an input of a first AC voltage and a first frequency and an output of a second AC voltage and a second frequency, which the second AC voltage is a relatively fixed voltage and the second frequency is a relatively higher frequency

wherein the driver and the at least one LED circuit form a driven circuit and the driver and the at least one circuit being configured such that one or more additional LED circuits can be added to or subtracted from the driven circuit so long as the total wattage output of the driver is not exceeded;

(a) without significantly affecting a pre-determined desired output range of light from any individual LED;

(b) without the need to;

(i) change a value of any discrete component;

or, (ii) to add or subtract any discrete components, of any of the pre-existing driven circuit components which remain after the change.

2. A lighting system comprising:

at least one LED circuit;

at least one bridge rectifier;

a driver connected to the least one bridge rectifier, the driver providing AC voltage and current to the at least one bridge rectifier, and the bridge rectifier providing DC voltage and current to the at least one LED circuit, the driver having an input of a first AC voltage and a first frequency and an output of a second AC voltage and a second frequency, which the second AC voltage is a relatively fixed voltage and the second frequency is a relatively higher frequency

wherein the driver, the at least one bridge rectifier, and the at least one LED circuit form a driven circuit and the driver, the at least one bridge rectifier, and the at least one LED circuit being configured such that one or more LED circuits can be added to or subtracted from the driven circuit so long as the total wattage output of the driver is not exceeded;

(a) without significantly affecting a pre-determined desired output range of light from any individual LED;

(b) without the need to;

(i) change a value of any discrete component;

or, (ii) to add or subtract any discrete components, of any of the pre-existing driven circuit components which remain after the change.

3. The lighting system of claim 2 wherein the bridge rectifier and at least one LED circuit are packaged together on a single substrate.

4. The lighting system of claim 2 wherein the bridge rectifier and at least one LED circuit are discretely packaged.

5. The lighting system of claim 4 wherein at least one additional LED circuit is connected to the outputs of the bridge rectifier, the at least one additional LED circuit being connected in parallel with the at least one LED circuit.