# US 11,122,666 B2 · Light emitting diode light structures

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- Number: US 11,122,666 B2
- Document ID: US11122666B2
- Status: Granted
- Kind: B2
- Application number: 17/248,132
- Filed: 2021-01-11
- Published: 2021-07-29
- Granted: 2021-09-14
- Earliest claimed: 2013-01-02
- Assignees: Austin IP Partners
- Applicants: Austin IP Partners
- Inventors: Mathew A. Rybicki; Daniel Patrick Mulligan
- Web page: https://patentgrep.com/patent/US11122666B2

## CPC

- H10H 20/857: Interconnections, e.g. lead-frames, bond wires or solder balls
- H05B 45/10: Controlling the intensity of the light
- H05B 45/397: Current mirror circuits
- H05B 45/40: Details of LED load circuits
- H05B 45/50: responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
- H05B 45/59: for reducing or suppressing flicker or glow effects
- H05B 47/19: via wireless transmission
- H10D 89/60: Integrated devices comprising arrangements for electrical or thermal protection, e.g. protection circuits against electrostatic discharge [ESD]
- H10W 90/00: Package configurations
- F21K 9/238: Arrangement or mounting of circuit elements integrated in the light source
- H10D 10/00: Bipolar junction transistors [BJT]
- H10W 72/07554: {changes in dispositions}
- H10W 72/547: {Dispositions of multiple bond wires}
- H10W 90/753: {between laterally-adjacent chips}
- Y02B 20/30: Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
- H10H: INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H10D: INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10W: GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- F21K: NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- Y02B: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS

## Abstract

A Light Emitting Diode (LED) light includes a bridge rectifier configured to be powered by an alternating current power source and to produce a rectified output. Control circuitry couples to the bridge rectifier and is configured to produce a shunt signal when the rectified output is less than a threshold voltage. A series connected Light Emitting Diode (LED) string includes a first group of LEDs and a second group of LEDs. A switch couples to a first side of the second group of LEDs and is controlled by the shunt signal to deactivate the second group of LEDs. The control circuitry may include a ratio metric series resistor string configured to sense a proportion of the rectified output and an inverter configured to generate the shunt signal based on the proportion of the rectified output.

## Claims

### Claim 1

An integrated circuit configured to interface with a series connected Light Emitting Diode (LED) string having a primary group of LEDs and a secondary group of LEDs, a first LED drive input connected to a first side of the primary group of LEDs, a secondary LED drive input connected to a second side of the primary group of LEDs and a first side of the secondary group of LEDs, and a third LED drive input connected to a secondary side of the secondary group of LEDs, the integrated circuit comprising:
a bridge rectifier configured to convert an alternating current power source to a rectified output;
a first drive output configured to couple to the first LED drive input;
a second drive output to the second LED drive input;
a third drive output configured to couple to the third LED drive input;
control circuitry configured to produce a shunt signal based upon a voltage of the rectified output; and
a switch configured to selectively shunt the second drive output and the third drive output in response to the shunt signal.

### Claim 2 (depends on 1)

The integrated circuit of claim 1, wherein the first drive output also couples to the rectified output.

### Claim 3 (depends on 1)

The integrated circuit of claim 1, further comprising dimming circuitry.

### Claim 4 (depends on 1)

The integrated circuit of claim 1, wherein the control circuitry comprises:
a voltage divider; and
a second switch having an output coupled to the switch.

### Claim 5 (depends on 4)

The integrated circuit of claim 4, wherein the second switch comprises a transistor.

### Claim 6 (depends on 1)

The integrated circuit of claim 1, further comprising a communication module.

### Claim 7 (depends on 6)

The integrated circuit of claim 6, wherein the communication module supports Radio Frequency (RF) communications.

### Claim 8 (depends on 6)

The integrated circuit of claim 6, wherein the communication module supports communications with at least one computing device.

### Claim 9 (depends on 8)

The integrated circuit of claim 8, wherein the control circuitry is configured to control operation of the series connected LED string based upon the communications with the at least one computing device.

### Claim 10

An integrated circuit configured to interface with a bridge rectifier that converts an alternating current power source to a rectified output and a series connected Light Emitting Diode (LED) string having a primary group of LEDs and a secondary group of LEDs, a first LED drive input connected to a first side of the primary group of LEDs, a secondary LED drive input connected to a second side of the primary group of LEDs and a first side of the secondary group of LEDs, and a third LED drive input connected to a secondary side of the secondary group of LEDs, the integrated circuit comprising:
a bridge rectifier input configured to couple to the rectified output;
a first drive output configured to couple to the first LED drive input;
a second drive output configured to couple to the second LED drive input;
a third drive output configured to couple to the third LED drive input;
control circuitry configured to produce a shunt signal based upon a voltage of the rectified output; and
a switch configured to selectively shunt the second drive output and the third drive output in response to the shunt signal.

### Claim 11 (depends on 10)

The integrated circuit of claim 10, wherein the first drive output also couples to the rectified output.

### Claim 12 (depends on 10)

The integrated circuit of claim 10, further comprising dimming circuitry.

### Claim 13 (depends on 10)

The integrated circuit of claim 10, wherein the control circuitry comprises:
a voltage divider; and
a second switch having an output coupled to the switch.

### Claim 14 (depends on 13)

The integrated circuit of claim 13, wherein the second switch comprises a transistor.

### Claim 15 (depends on 10)

The integrated circuit of claim 10, further comprising a communication module.

### Claim 16 (depends on 15)

The integrated circuit of claim 15, wherein the communication module supports Radio Frequency (RF) communications.

### Claim 17 (depends on 15)

The integrated circuit of claim 15, wherein the communication module supports communications with at least one computing device.

### Claim 18 (depends on 17)

The integrated circuit of claim 17, wherein the control circuitry is configured to control operation of the series connected LED string based upon the communications with the at least one computing device.