Switch circuit for LED lighting assembly adaptive to multilevel light switches

Patent metadata

Field	Value
Publication number	US-9681506-B2
Application number	US-201314442479-A
Country	US
Kind code	B2
Filing date	Dec 2, 2013
Priority date	Dec 10, 2012
Publication date	Jun 13, 2017
Grant date	Jun 13, 2017

Abstract

One aspect of the present disclosure directs to a switch circuit including an isolator circuit to allow detection of switch states of a multilevel light switch. Another aspect of the present disclosure directs to a lighting assembly containing light emitting diodes (LEDs) of different colors, where the lighting assembly produces light of different color depending on the switch state of a multilevel light switch.

First claim

What is claimed is:

1. An LED switch circuit designed to connect to a first LED and a second LED and a multilevel light switch having a first switch and a second switch, comprising:
a first isolator circuit coupled to the first switch, the first isolator circuit configured to detect a first switch state of the first switch and produce a first signal associated with the first switch state,
a second isolator circuit coupled to the second switch, the second isolator circuit configured to detect a second switch state of the second switch and produce a second signal associated with the second switch state,
a first converter circuit coupled to the first LED, the first converter circuit configured to receive the first signal and change current flowing through the first LED in response to the first signal,
a second converter circuit coupled to the second LED, the second converter circuit configured to receive the second signal and change current flowing through the second LED in response to the second signal.

2. The LED switch circuit of claim 1 , wherein at least one of the first isolator circuit and the second isolator circuit comprises an opto-isolator or a digital isolator.

3. The LED switch circuit of claim 1 , wherein at least one of the first isolator circuit and the second isolator circuit comprises a rectifier.

4. The LED switch circuit of claim 1 , wherein the first converter circuit comprises a transistor.

5. The LED switch circuit of claim 1 , further comprising: a logic circuit coupled to the first isolator circuit and the second isolator circuit, the logic circuit configured to receive the first signal and the second signal and generate a first logic signal and a second logic signal based on the first signal and the second signal.

6. An LED lighting assembly designed to connect to a multilevel light switch having a first switch and a second switch, comprising:
a first LED,
a second LED, and
an LED switch circuit, comprising:
a first isolator circuit coupled to the first switch, the first isolator circuit configured to detect a first switch state and produce a first signal associated with the first switch state,
a second isolator circuit coupled to the second switch, the second isolator circuit configured to detect a second switch state and produce a second signal associated with the second switch state,
a first converter circuit coupled to the first LED, the first converter circuit configured to receive the first signal and change current flowing through the first LED in response to the first signal, and
a second converter circuit coupled to the second LED, the second converter circuit configured to receive the second signal and change current flowing through the second LED in response to the second signal.

7. The LED lighting assembly of claim 6 , wherein the first LED has a first color different from a second color of the second LED.

8. The LED lighting assembly of claim 6 , wherein at least one of the first isolator circuit and the second isolator circuit comprises an opto-isolator or a digital isolator.

9. The LED lighting assembly of claim 6 , wherein the first converter circuit comprises a transistor.

10. An LED lighting assembly designed to connect to a multilevel light switch having a first switch and a second switch, comprising:
a first LED,
a second LED, and
an LED switch circuit, comprising:
a first isolator circuit coupled to the first switch, the first isolator circuit configured to detect a first switch state and produce a first signal associated with the first switch state,
a second isolator circuit coupled to the second switch, the second isolator circuit configured to detect a second switch state and produce a second signal associated with the second switch state,
a logic circuit coupled to the first isolator circuit and the second isolator circuit, the logic circuit configured to receive the first signal and the second signal and generate a first logic signal and a second logic signal based on the first signal and the second signal,
a first converter circuit coupled to the logic circuit and the first LED, the first converter circuit configured to receive the first logic signal and change current flowing through the first LED in response to the first logic signal, and
a second converter circuit coupled to the logic circuit and the second LED, the second converter circuit configured to receive the second logic signal and change current flowing through the second LED in response to the second logic signal.

11. The LED lighting assembly of claim 10 , wherein the first LED has a first color different from a second color of the second LED.

12. The LED lighting assembly of claim 10 , wherein at least one of the first isolator circuit and the second isolator circuit comprises an opto-isolator or a digital isolator.

13. The LED lighting assembly of claim 10 , further comprising:
a third LED,
a third converter circuit coupled to the logic circuit and the third LED,
wherein the logic circuit generate a third logic signal based on the first signal and the second signal, the third converter circuit is configured to receive the first logic signal and change current flowing through the third LED in response to the third logic signal.

Assignees

• 3M Innovative Properties Co

Inventors

• Vos Martin J
• Jager Gregory G

Classifications

• H05B47/10

  Controlling the light source · CPC title

• H05B45/10

  Controlling the intensity of the light · CPC title

• H05B45/48

  having LEDs organised in strings and incorporating parallel shunting devices · CPC title

• H05B45/46 Primary

  having LEDs disposed in parallel lines · CPC title

• H05B33/083

  Electricity · mapped topic