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Apparatus and method for controlling current to a solid state lighting circuit

A technology of solid-state lighting and modulation control circuit, which is applied in the direction of lighting devices, electric light sources, electrical components, etc., and can solve problems such as mains grid distortion, magnetic tripping, and triggering circuit breakers

Active Publication Date: 2017-05-24
SIGNIFY HLDG BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when looking at a large number of LED-based light sources, the high current during short time intervals creates distortions on the mains grid during very short time intervals and may trigger breakers (e.g. triggering a snap action of the breaker magnetic trip)

Method used

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  • Apparatus and method for controlling current to a solid state lighting circuit
  • Apparatus and method for controlling current to a solid state lighting circuit
  • Apparatus and method for controlling current to a solid state lighting circuit

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Embodiment Construction

[0033] More generally, Applicants have recognized and appreciated that it is advantageous to maintain a high power factor and efficiency while driving LED-based lighting units directly from mains power. Applicants have also recognized and appreciated that it would be advantageous to prevent excessive inrush current when initially turning on an LED-based lighting unit driven directly from mains power.

[0034] In view of the foregoing, various embodiments and implementations of the present invention are directed to drivers for LED-based lighting units for performing active input current shaping. That is, the driver includes a current source configured to dynamically modulate the magnitude of the input current in response to the waveform of the input voltage, although other input criteria may also be used. For example, the magnitude of the input current may be modulated in response to a time delay or a combination of a time delay and the input voltage waveform without departing ...

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PUM

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Abstract

An apparatus for controlling current to a solid state lighting load includes a capacitor (241, 341) and a current source (245, 345). A capacitor is connected in a parallel arrangement with the solid state lighting load (260, 360). A current source is connected in series with the capacitor and the parallel arrangement of the solid state lighting load. The current source is configured to dynamically modulate the magnitude of the input current provided to the parallel arrangement of the capacitor and the solid state lighting load based on the input voltage.

Description

technical field [0001] The present invention is generally directed to the control of solid state lighting devices. More specifically, the various inventive methods and apparatus disclosed herein relate to controlling the power factor and efficiency of solid state lighting device drivers. Background technique [0002] Digital lighting technology, ie lighting based on semiconductor light sources such as light emitting diodes (LEDs), offers a viable alternative to traditional fluorescent, HID and incandescent lamps. The functional advantages and benefits of LEDs include high energy conversion and light efficiency, durability, low operating costs, and many others. Recent advances in LED technology have provided efficient and robust full-spectrum lighting sources that enable a variety of lighting effects in many applications. For example, as discussed in detail in U.S. Pat. , red, green and blue); and a processor for independently controlling the output of the LEDs so as to pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B33/08H05B44/00
CPCH05B45/50Y02B20/30H05B45/397H05B45/355H05B45/59H05B45/395
Inventor H·J·G·拉德玛彻
Owner SIGNIFY HLDG BV