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Circuit for driving light source, related lighting system and method for driving light source

A technology for lighting systems and driver circuits, applied in the direction of light sources, electric light sources, lighting devices, etc., can solve problems such as lack of uniformity, manufacturing tolerances, etc.

Inactive Publication Date: 2015-11-18
OSRAM GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] However, due to manufacturing tolerances, each LED can have different electrical and optical characteristics, possibly resulting in a lack of uniformity in the light produced by the LED string

Method used

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  • Circuit for driving light source, related lighting system and method for driving light source
  • Circuit for driving light source, related lighting system and method for driving light source
  • Circuit for driving light source, related lighting system and method for driving light source

Examples

Experimental program
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Embodiment Construction

[0025] In the following description, numerous specific details are given in order to provide a thorough understanding of the embodiments. Embodiments may be practiced without one or more of the specific details or with other methods, components, materials, etc. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring aspects of the embodiments.

[0026] Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout the specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures or characteristics may be combined in any suitable manner in one or more embodiments.

[0027] The headings prov...

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PUM

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Abstract

A circuit for driving a plurality of light sources via a current generator (104), wherein the light sources are grouped into a plurality of light source sets (20a, 20b). The driver circuit comprises a plurality of inductive elements (22a, 22b), a plurality of switching means (24a, 24b) adapted to selectively connect each light source set (20a, 20b) in series with one of the inductive elements (22a, 22b), and a control circuit (102) configured for driving the switching means (24a, 24b), so that a) during a first operation time interval, each light source set (20a, 20b) is connected in series with a respective first inductive element (22a, 22b), and b) during a second operation time interval, each light source set (20a, 20b) is connected in series with a respective second inductive element (22a, 22b), wherein the respective second inductive element (22a, 22b) is separate from the respective first inductive element (22a, 22b).

Description

technical field [0001] The present disclosure relates to circuits for driving light sources. [0002] This description has been conceived with particular attention to possible applications on electronic converters for light sources comprising at least one LED. Background technique [0003] An electronic converter for a light source comprising eg at least one LED (Light Emitting Diode) usually provides an output direct current. For example, this current can be steady or varied over time to adjust the intensity of the light emitted by the light source (a so-called "dimming" function). [0004] figure 1 A possible lighting system comprising an electronic converter 10 and an LED module 20 comprising at least one LEDL is shown. [0005] The electronic converter 10 typically includes a control circuit 102 (such as a microprocessor) and a power circuit 104 (such as a switching power supply AC / DC or DC / DC) that receives as input a supply signal (such as from an electrical wire) a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B37/02
CPCH05B37/02H05B45/39H05B45/44H05B47/10Y02B20/30H05B45/10H05B45/37H05B45/46H05B45/48
Inventor 阿尔贝托·阿尔菲耶尔洛伦佐-罗伯托·特雷维萨内洛西蒙娜·马萨罗马泰奥·托斯坎
Owner OSRAM GMBH