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Power supply device for light sources, such as halogen lamps, and related method

A technology for power supply equipment and equipment, which is applied to power supply equipment for light sources such as halogen lamps and related fields, can solve problems such as difficulty in using self-oscillation topology, reduce overall energy consumption, prevent output voltage drop, and prevent failures. Effect

Inactive Publication Date: 2011-11-09
OSRAM GMBH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] In the case of electronic transformers with rather high power (eg 300W input power), the use of self-oscillating topologies is difficult

Method used

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  • Power supply device for light sources, such as halogen lamps, and related method
  • Power supply device for light sources, such as halogen lamps, and related method
  • Power supply device for light sources, such as halogen lamps, and related method

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Embodiment Construction

[0040] In the following description, numerous specific details are given to provide a thorough understanding of the embodiments. Embodiments may be practiced without one or more of these specific details, or may be practiced with other methods, components, materials, and the like. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring aspects of the embodiments.

[0041] 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 "in one embodiment" or "in an embodiment" in various places throughout this 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.

[0042] The head...

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Abstract

A power supply device for light sources (L), such as halogen lamps, can be supplied from mains (M) via a phase-cut dimmer (28), selectively switchable between a conductive state and a non-conductive state, so as to permit or interrupt feeding of the device from mains. The device includes a power stage (10) to feed at least one light source (L), a drive stage (22, 24) for the power stage (10), and a supply stage (26) for the drive stage (22, 24). Sensor means (30, 34) are provided to detect when said dimmer (28) is non-conductive and when said dimmer (28) is conductive again. The drive stage (22, 24) is coupled to the sensor means (30, 34) to disable driving of power stage (20) when the sensor means (30, 34) indicate that dimmer (28) is non-conductive, and to enable driving of power stage (20) when the sensor means (30, 34) indicate that said dimmer (28) is conductive again.

Description

technical field [0001] The present disclosure relates to techniques for powering light sources such as, for example, low voltage halogen lamps. [0002] The present disclosure is designed with particular attention to its application to those power supply devices adapted to perform the function of adjusting the intensity of light sources (so-called "dimming"). Background technique [0003] For the supply of light sources such as halogen lamps, for example with a low supply voltage, electronic transformers are used which can perform an intensity adjustment function for the light source, a so-called "dimming" function. [0004] The implementation of this function exploits the fact that the light intensity of these light sources depends on the (average) intensity of the current flowing through the light sources. [0005] Intensity adjusting devices (referred to as "dimmers" for simplicity) operate by "cutting" a sinusoidal waveform that has generally undergone rectification via...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B39/04
CPCY02B20/181H05B39/045Y02B20/142Y02B20/00H05B41/14
Inventor 拉法埃莱·皮瓦
Owner OSRAM GMBH
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