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Load control device for a light-emitting diode light source

A technology of load control and electrical load, which is applied in the field of load control devices for light-emitting diode light sources, and can solve problems such as changing the intensity of LED light sources.

Pending Publication Date: 2021-03-16
LUTRON TECH CO LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as the duty cycle of the pulse signal changes, the average current supplied to the LED light source also changes, thereby changing the intensity of the light output of the LED light source

Method used

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  • Load control device for a light-emitting diode light source
  • Load control device for a light-emitting diode light source
  • Load control device for a light-emitting diode light source

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0012] figure 1 is a simplified block diagram of an example load control device (e.g., a light emitting diode (LED) driver 100) for controlling the amount of power delivered to an electrical load, such as an LED light source 102 (e.g., an LED light engine), and thereby controlling The intensity of the light source. The LED light source 102 is shown as a plurality of LEDs connected in series, but depending on the particular lighting system, the LED light source 102 may comprise a single LED or a plurality of LEDs connected in parallel or a suitable combination thereof. LED light source 102 may include one or more organic light emitting diodes (OLEDs). LED driver 100 may include a hot terminal H and a neutral terminal adapted to be coupled to an alternating current (AC) power source (not shown).

[0013] The LED driver 100 may include a radio frequency interference (RFI) filter circuit 110, a rectifier circuit 120, a boost converter 130, a load regulation circuit 140, a contro...

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PUM

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Abstract

A load control device may utilize a feedback signal representative of an average magnitude of the load current conducted through an electrical load to control the amount of power delivered to the electrical load. The feedback signal may be generated based on a sense signal that is electrically isolated from the line voltage input of the load control device. Depending on the operational characteristics of the electrical load, the feedback signal may be generated using different techniques. In one example technique, the sense signal may be integrated and filtered to derive the feedback signal. In another example technique, the sense signal may be used in conjunction with an input power of the load control device and an efficiency parameter of the load control device to derive the feedback signal. In yet another example technique, values derived from the foregoing two techniques may be blended together to obtain the feedback signal.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of U.S. Provisional Patent Application No. 62 / 712,109, filed July 30, 2018, the entire disclosure of which is hereby incorporated by reference. Background technique [0003] Light emitting diode (LED) light sources (eg, LED light engines) are often used to replace or replace conventional incandescent, fluorescent, or halogen lamps, among others. An LED light source may comprise a plurality of light emitting diodes mounted on a single structure and arranged in a suitable housing. LED light sources are generally more efficient and offer a longer lifespan than incandescent, fluorescent and halogen lamps. For proper lighting, an LED driver control device (eg, an LED driver) can be coupled between an alternating current (AC) source and the LED light source to regulate the power supplied to the LED light source. The LED driver can regulate the voltage supplied to the LED light source to a ...

Claims

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Application Information

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IPC IPC(8): H02M3/335H05B44/00
CPCH02M3/33523H05B45/39H05B45/382H05B45/14H02M3/33571H05B45/37
Inventor 斯图尔特·W·德扬
Owner LUTRON TECH CO LLC