Multi-pad, multi-junction LED package

• US 10,039,165 B2
• Filed: 05/02/2017
• Issued: 07/31/2018
• Est. Priority Date: 05/02/2016
• Status: Active Grant

• Current Assignee: Lumileds LLC (Apollo Global Management, Inc.)
• Original Assignee: Lumileds LLC (Apollo Global Management, Inc.)
• Inventors: Qiu, Yifeng, Guth, Gregory, Breejen, Jeroen den
• Primary Examiner(s): Tan, Vibol
• Application Number:
  US15/584,546
• Publication Number:
  US 20170318637A1
• Time in Patent Office: 455 Days
• CPC Class Codes: F21K 9/27 Retrofit light sources for lighting devices with two fittings for each light source, e.g. for substitution of fluorescent tubes
• CPC Class Codes: F21V 23/04 the elements being switches safety devices F21V25/00
• CPC Class Codes: H01L 25/0753 the devices being arranged next to each other
• CPC Class Codes: H01L 27/15 including semiconductor components having potential barriers, specially adapted for light emission
• CPC Class Codes: H05B 45/10 Controlling the intensity of the light
• CPC Class Codes: H05B 45/30 Driver circuits
• CPC Class Codes: H05B 45/48 having LEDs organised in strings and incorporating parallel shunting devices
• CPC Class Codes: H05B 47/165 following a pre-assigned programmed sequence; Logic control [LC]

Abstract

A light emitting diode (“LED”) module is disclosed. The LED module includes a first LED tap and a second LED tap, the first tap being powered on for a longer amount of time than the second LED tap, based on an alternating current voltage. The LED module also includes a first LED package on which a first LED associated with the first LED tap and a second LED associated with the second LED tap are disposed. The LED module further includes a second LED package on which a third LED associated with the first LED tap and a fourth LED associated with the second LED tap are disposed.

Claims

1. A light emitting diode (“

LED”

) module comprising;

a first LED tap and a second LED tap, the first LED tap being powered on for a longer amount of time than the second LED tap, based on an alternating current voltage;

a first LED package on which a first LED associated with the first LED tap and a second LED associated with the second LED tap are disposed, each of the LEDs in the first LED package being associated with a different tap; and

a second LED package on which a third LED associated with the first LED tap and a fourth LED associated with the second LED tap are disposed, each of the LEDs in the second LED package being associated with a different tap,

wherein each of the first LED tap and the second LED tap is associated with a same number of LEDs and the second LED package is disposed a distance along a housing from the first LED package such that the LEDs of the first LED package appear approximately as a point light source and the LEDs of the second LED package appear approximately as a point light source, to average out lighting variations provided to the first LED tap and the second LED tap.

2. The LED module of claim 1, further comprising:

a first tapped linear driver (“

TLD”

) configured to drive both the first LED tap and the second LED tap based on the alternating current voltage,

wherein the first TLD is configured to sense an instantaneous voltage of the alternating current voltage and to power different numbers of LEDs based on the instantaneous voltage.

3. The LED module of claim 2, wherein:

the first LED package further comprises a fifth LED associated with a third LED tap and a sixth LED associated with a fourth LED tap, wherein each of the first LED tap, the second LED tap, the third LED tap, and the fourth LED tap are powered on for different amounts of time based on the alternating current voltage.

4. The LED module of claim 3, wherein:

the first LED package and the second LED package are included in a set of LED packages, each of which includes four LEDs, each LED of each package being coupled to a different one of the first LED tap, the second LED tap, the third LED tap, and the fourth LED tap,

the LEDs coupled to the first LED tap, the LEDs coupled to the second LED tap, the LEDs coupled to the third LED tap, and the LEDs coupled to the fourth LED tap are all coupled in series, and

the LED module further comprises a set of switches, each switch coupled to and corresponding to a different LED tap of the first LED tap, the second LED tap, the third LED tap, and the fourth LED tap, the set of switches configured to control the first LED tap, the second LED tap, the third LED tap, and the fourth LED tap to be powered on for different amounts of time.

5. The LED module of claim 2, further comprising:

third LED package that comprises a fifth LED associated with a third LED tap and a sixth LED associated with a fourth LED tap.

6. The LED module of claim 5, wherein the first tap is powered on by a first TLD for the most time out of the first through fourth LED taps and the second LED tap is powered on by the first TLD for the least time out of the first through fourth LED taps.

7. The LED module of claim 6, wherein:

the first LED package and the second LED package are included in a first set of LED packages, wherein each LED package of the first set of LED packages includes an LED powered by the first LED tap and an LED powered by the second LED tap,

the third LED package is included in a second set of LED packages, wherein each LED package of the second set of LED packages includes an LED powered by the third LED tap and an LED powered by the fourth LED tap,

the LEDs of the first set of LED packages powered by the first LED tap are coupled in series with the LEDs of the second set of LED packages powered by the third LED tap, which are coupled in series with the LEDs of the second set of LED packages powered by the fourth LED tap, which are coupled in series with the LEDs of the first set of LED packages powered by the second LED tap, and

the LED module further comprises a set of switches, each switch coupled to and corresponding to a different LED tap of the first LED tap, the second LED tap, the third LED tap, and the fourth LED tap, the set of switches configured to control the first LED tap, the second LED tap, the third LED tap, and the fourth LED tap to be powered on for different amounts of time.

8. The LED module of claim 1, further comprising:

a first tapped linear driver (“

TLD”

) configured to drive the first LED tap based on the alternating current voltage; and

a second tapped linear driver configured to drive the second LED tap based on the alternating current voltage.

9. The LED module of claim 8, wherein:

the first LED package and the second LED package are both included in a first set of LED packages, wherein each LED package in the first set of LED packages includes an LED powered by the first LED tap and an LED powered by the second LED tap; and

the LED module further comprises a second set of LED packages, wherein each LED package in the second set of LED packages includes an LED powered by a third LED tap driven by the first TLD and an LED powered by a fourth LED tap driven by the second TLD, wherein the third LED tap is turned on for a different amount of time than the fourth LED tap.

10. A method for driving a light emitting diode (“

LED”

) module, the method comprising;

powering on a first LED tap for a longer amount of time by an alternating current voltage than a second LED tap;

powering, via the first LED tap, a first LED disposed on a first LED package;

powering, via the second LED tap, a second LED disposed on the first LED package; and

powering a third LED associated with the first LED tap and a fourth LED associated with the second LED tap, the third LED and fourth LED being disposed on a second LED package,

wherein each of the LEDs in the first LED package is associated with a different tap, each of the LEDs in the second LED package is associated with a different tap, each tap is associated with the same number of LEDs, and the second LED package is disposed a distance along a housing from the first LED package such that the LEDs of the first LED package appear approximately as a point light source and the LEDs of the second LED package appear approximately as a point light source, to average out lighting variations provided to the first LED tap and the second LED tap.

11. The method of claim 10, wherein:

powering the first LED tap and the second LED tap comprises powering the first LED tap and the second LED tap via a first tapped linear driver (“

TLD”

), wherein the first tapped linear driver is configured to sense an instantaneous voltage of the alternating current voltage and to power different numbers of LEDs based on the instantaneous voltage.

12. The method of claim 11, further comprising:

powering on each of the first LED tap, the second LED tap, a third LED tap associated with a fifth LED disposed on the first LED package, and a fourth LED tap associated with a sixth LED disposed on the first LED package, for different amounts of time based on the alternating current voltage.

13. The method of claim 12, wherein:

the first LED package and the second LED package are included in a set of LED packages, each of which includes four LEDs, each LED of each package being coupled to a different one of the first LED tap, the second LED tap, the third LED tap, and the fourth LED tap,

the LEDs coupled to the first LED tap, the LEDs coupled to the second LED tap, the LEDs coupled to the third LED tap, and the LEDs coupled to the fourth LED tap are all coupled in series, and

the method further comprises controlling the first LED tap, the second LED tap, the third LED tap, and the fourth LED tap to be powered on for different amounts of time, via a set of switches, each switch coupled to and corresponding to a different LED tap of the first LED tap, the second LED tap, the third LED tap, and the fourth LED tap.

14. The method of claim 11, further comprising:

powering a third tap associated with a fifth LED disposed on a third LED package; and

powering a fourth tap associated with a sixth LED disposed on the third LED package.

15. The method of claim 14, wherein the first tap is powered on by a first TLD for the most time out of the first through fourth LED taps and the second LED tap is powered on by the first TLD for the least time out of the first through fourth LED taps.

16. The method of claim 15, wherein:

the first LED package and the second LED package are included in a first set of LED packages, wherein each LED package of the first set of LED packages includes an LED powered by the first LED tap and an LED powered by the second LED tap,

the third LED package is included in a second set of LED packages, wherein each LED package of the second set of LED packages includes an LED powered by the third LED tap and an LED powered by the fourth LED tap,

the LEDs of the first set of LED packages powered by the first LED tap are coupled in series with the LEDs of the second set of LED packages powered by the third LED tap, which are coupled in series with the LEDs of the second set of LED packages powered by the fourth LED tap, which are coupled in series with the LEDs of the first set of LED packages powered by the second LED tap, and

the method further comprises controlling the first LED tap, the second LED tap, the third LED tap, and the fourth LED tap to be powered on for different amounts of time via a set of switches, each switch coupled to and corresponding to a different LED tap of the first LED tap, the second LED tap, the third LED tap, and the fourth LED tap.

17. The method of claim 10, wherein:

powering the first LED tap for the longer amount of time than the second LED tap comprises driving the first LED tap via a first tapped linear driver (“

TLD”

) based on the alternating current voltage and driving the second LED tap via a second TLD based on the alternating current voltage.

18. The method of claim 17, wherein:

the first LED package and the second LED package are both included in a first set of LED packages, wherein each LED package in the first set of LED packages includes an LED powered by the first LED tap and an LED powered by the second LED tap; and

the LED module further comprises a second set of LED packages, wherein each LED package in the second set of LED packages includes an LED powered by a third LED tap driven by the first TLD and an LED powered by a fourth LED tap driven by the second TLD, wherein the third LED tap is turned on for a different amount of time than the fourth LED tap.

19. A light emitting diode (“

LED”

) installation comprising;

a housing, in which is disposed;

a first LED tap and a second LED tap, the first LED tap being powered on for a longer amount of time than the second LED tap, based on an alternating current voltage;

a first LED package on which a first LED associated with the first LED tap and a second LED associated with the second LED tap are disposed, each of the LEDs in the first LED package being associated with a different tap; and

a second LED package on which a third LED associated with the first LED tap and a fourth LED associated with the second LED tap are disposed, each of the LEDs in the second LED package being associated with a different tap,

wherein each of the first LED tap and the second LED tap is associated with a same number of LEDs and the second LED package is disposed a distance along a housing from the first LED package such that the LEDs of the first LED package appear approximately as a point light source and the LEDs of the second LED package appear approximately as a point light source, to average out lighting variations provided to the first LED tap and the second LED tap.

20. The LED installation of claim 19, wherein the housing comprises one of a tube light emitting diode installation housing, a downright installation housing, or a troffer installation housing.