# US 2019/0357329 A1 · Led lamp with selectable color temperature output

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- Number: US 2019/0357329 A1
- Document ID: US20190357329A1
- Status: Published application
- Kind: A1
- Application number: 15/981,604
- Filed: 2018-05-16
- Published: 2019-11-21
- Earliest claimed: 2018-05-16
- Assignees: GE Lighting Solutions, LLC
- Applicants: GE Lighting Solutions, LLC
- Inventors: Kevin Jeffrey BENNER; Bruce Richard ROBERTS; Kevin James VICK
- Web page: https://patentgrep.com/patent/US20190357329A1

## CPC

- H05B 45/20: Controlling the colour of the light
- H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL

## Abstract

A light emitting diode (LED) lamp includes a primary LED grouping (210,310), a switchable LED grouping (215), and a conduction path selector (240,340) configured to select a conductive path that places the primary LED grouping in electrical series with at least a portion of the switchable LED grouping, or bypasses the switchable LED grouping. The primary LED grouping have a first color temperature rating, and each respective LED subgrouping have a respective color temperature different from the first color temperature. Selection of one or more LED subgrouping results in the LED lamp emitting different color temperatures

## Claims

### Claim at position 1

1-15. (canceled)

### Claim 16

A color correlated temperature (CCT) tunable LED lamp comprising:
a primary LED grouping including a plurality of LED light sources that provide a first net CCT rating light emission;
switchable LED groupings comprising at least (i) a second LED grouping of a plurality of LED light sources providing a second net CCT rating light emission, and (ii) a third LED grouping of a plurality of LED light sources providing a third net CCT rating light emission;
a conduction path selector to respectively connect or isolate one or more of the second LED grouping and third LED grouping to or from the primary LED grouping, the second net CCT rating is greater than the first net CCT rating, and the third net CCT rating is lower than the first net CCT rating; and
LED light sources of the primary LED grouping, LED light sources of the second LED grouping, and LED light sources of the third LED grouping are positionally distributed in an interleaved arrangement.

### Claim 17 (depends on 16)

The CCT tunable LED lamp of claim 16, including:
the primary LED grouping having a first quantity of LED light sources; and
each of the switchable LED groupings having a quantity of LED light sources such that the first quantity is greater than the quantity of LED light sources in each of the switchable LED groupings.

### Claim 18 (depends on 16)

The CCT tunable LED lamp of claim 16, wherein the conduction path selector is configured to select a conductive path that places the primary LED grouping in electrical series with at least one of the second LED grouping and the third LED grouping.

### Claim 19 (depends on 16)

The CCT tunable LED lamp of claim 16, wherein at least some LED light sources in the primary LED grouping have different CCT ratings from each other, and the first net CCT rating is the net of the different CCT ratings within the primary LED grouping.

### Claim 20 (depends on 16)

The CCT tunable LED lamp of claim 16, wherein at least some LED light sources in the second LED grouping have different CCT ratings from each other, and the second net CCT rating is the net of the different CCT ratings within the second LED grouping.

### Claim 21 (depends on 16)

The CCT tunable LED lamp of claim 16, wherein at least some LED light sources in the third LED grouping have different CCT ratings from each other, and the third net CCT rating is the net of the different CCT ratings within the third LED grouping.

### Claim 22 (depends on 16)

The CCT tunable LED lamp of claim 16, wherein the CCT tunable LED lamp is configured to be retrofitted into an existing lamp holder and to be driven by an existing electronic driver for driving the primary LED grouping and the switchable LED groupings.

### Claim 23 (depends on 16)

The CCT tunable LED lamp of claim 16, wherein the CCT tunable LED lamp includes one electronic driver for driving the primary LED grouping and the switchable LED groupings.