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Energy Efficient LED

Patent

US9338845

Owner

OSRAM GmbH

Filing Date

December 10, 2013

Priority Date

January 04, 2013

Portfolio

Lighting - OSRAM

Intro

With this patent, an energy efficient operation of LEDs is made possible by a circuit arrangement, in which two different LED chains can be coupled to a supply source at respectively different points in time. 

Claims

1. A light emitting diode arrangement, comprising at least one first light emitting diode chain having a first plurality of series-connected light emi...
  1. A light emitting diode arrangement, comprising at least one first light emitting diode chain having a first plurality of series-connected light emitting diodes; at least one second light emitting diode chain having a second plurality of series-connected light emitting diodes; a circuit arrangement for coupling the first and second light emitting diode chains to a supply source, which provides a temporally varying voltage; wherein the light emitting diodes are arranged at least partly on at least one first arrangement surface; wherein the circuit arrangement is configured in such a way that the first light emitting diode chain and second light emitting diode chain in each case can be coupled to the supply source and can be decoupled from the supply source, wherein the first light emitting diode chain can be coupled to the supply source at first points in time and the second light emitting diode chain can be coupled to the supply source at second points in time, wherein the first points in time differ from the second points in time; wherein the circuit arrangement is configured in such a way that, in the case of a coupling of the light emitting diode arrangement to the supply source, a current having a first average current intensity flows through the first light emitting diode chain and a current having a second average current intensity flows through the second light emitting diode chain, said second average current intensity differing from the first average current intensity at least owing to the difference between the first and second points in time; wherein the light emitting diodes of the at least one first and second light emitting diode chain are arranged according to a predefined criterion depending on their average current intensities, wherein the light emitting diode arrangement has at least one second arrangement surface, wherein the at least one first and second arrangement surface are arranged on at least one main body, wherein the normal vectors of the at least one first arrangement surface differ in terms of their direction from the normal vectors of the at least one second arrangement surface, wherein an orientation of the normal vectors points away from the at least one main body, and wherein the separation is configured in such a way that the light emitting diodes of the at least one first light emitting diode chain are arranged on the at least one first arrangement surface and the light emitting diodes of the at least one second light emitting diode chain are arranged on the at least one second arrangement surface.
  2. The light emitting diode arrangement of claim 1, wherein the predefined criterion in the case of the arrangement of the light emitting diodes on the at least one first arrangement surface relates to a mixture of the light emitting diodes of the at least one first and second light emitting diode chain. 
  3. The light emitting diode arrangement of claim 2, wherein the mixture is configured in such a way that at least two of the light emitting diodes of the at least one first light emitting diode chain are arranged in each case alongside at least one light emitting diode of the light emitting diodes of the at least one second light emitting diode chain.  
  4. The light emitting diode arrangement of claim 1, wherein the light emitting diodes are arranged linearly, such that each light emitting diode has in each case at most two neighboring light emitting diodes.
  5. The light emitting diode arrangement of claim 1, wherein the light emitting diodes are arranged at a respective distance from one another, wherein the distances are dimensioned such that the distances from light emitting diodes having a larger average current intensity to neighboring light emitting diodes are on average greater than the average distances from the light emitting diodes having smaller average current intensities to neighboring light emitting diodes.
  6. The light emitting diode arrangement of claim 1, wherein the predefined criterion relates to a separation of the light emitting diodes of the at least one first and second light emitting diode chain.
  7. The light emitting diode arrangement of claim 1, wherein the first plurality of light emitting diodes differs in terms of its number from the second plurality of light emitting diodes.
  8. The light emitting diode arrangement of claim 1, wherein the first and second arrangement surfaces are arranged with respect to one another in such a way that light which can be emitted by the light emitting diodes arranged on the first arrangement surface can be emitted for the most part into a first solid angle range and light which can be emitted by the light emitting diodes arranged on the second arrangement surface can be emitted for the most part into a second solid angle range, which differs from the first solid angle range.
  9. The light emitting diode arrangement of claim 1, wherein the first and second arrangement surfaces are embodied as planar surfaces and are arranged oppositely on two sides of the at least one main body.
  10. The light emitting diode arrangement of claim 1, wherein the at least one main body is embodied in a conical fashion with a base side and a lateral side and the first arrangement surface is arranged at the base side of the main body and the second arrangement surface is arranged at the lateral side of the main body.  
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Abstract

An LED arrangement includes a first LED chain having first LEDs; a second LED chain having second LEDs; a circuit arrangement for coupling the first a...
An LED arrangement includes a first LED chain having first LEDs; a second LED chain having second LEDs; a circuit arrangement for coupling the first and second LED chains to a supply source; wherein the circuit arrangement is configured such that the first and second LED chains can be coupled to or decoupled from the supply source, wherein the first LED chain can be coupled to the supply source at first points in time and the second LED chain can be coupled to the supply source at second points in time; wherein the circuit arrangement is configured such that, in the case of a coupling of the LED arrangement to the supply source, a current having a first average current intensity through the first LED chain and a current having a second average current intensity through the second LED chain, wherein the LEDs are arranged depending on their current intensities.
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Buggi
January 08, 2018

The Patent is about a light bulb having different LED strings for direct and indirect light, so the overall light of that bulb can be shaped in a more convenient manner. The indirect light can also have a different light colour than the direct light to compensate the changes in reflection of different surfaces. This is a good patent for all areas of architectural and art lighting solutions where the light designer wants to have maximum impact on the light emitted.

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Franz
January 08, 2018

Even if claim 1 is lengthy the scope is rather broad. If you want to illuminate different objects with different LED chains having different mean currents and the chains connected to a single power source at different times, then this is your patent.

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Patent101
December 28, 2017

The independent claim is very long. But could read on LED chains in retrofits or other applications when they use two different LED chains. Does anyone know more?

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