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Methods and apparatus for lifetime extension of led-based lighting units

A technology of LED driver and lighting system, applied in lighting devices, electrical components, light sources, etc.

Inactive Publication Date: 2016-02-17
SIGNIFY HLDG BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such techniques may present one or more disadvantages, such as necessitating the use of a central controller, necessitating a control network between LED nodes, and / or requiring switching to be performed in a strictly predefined manner

Method used

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  • Methods and apparatus for lifetime extension of led-based lighting units
  • Methods and apparatus for lifetime extension of led-based lighting units
  • Methods and apparatus for lifetime extension of led-based lighting units

Examples

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Embodiment Construction

[0044] In LED-based lighting units that include LEDs, it may be desirable to extend the lifetime of the LED-based lighting unit. For example, it may be desirable to extend the lifetime of LED-based lighting units in certain installation locations and / or in certain installation scenarios. For example, it may be desirable to have a relatively long lifespan for an LED-based lighting unit installed in a hard-to-reach area in order to reduce the frequency with which the LED-based lighting unit will need to be serviced and / or replaced.

[0045] To prolong life, some LED-based lighting units utilize redundant LEDs that are activated if the primary LED becomes inoperable. To prolong life, some other LED-based lighting units utilize temperature sensors to sense overheating conditions that may be detrimental to the life of one or more LEDs and to turn off one or more LEDs and / or reduce one or more LEDs in response to the overheating condition. Light output from multiple LEDs. To prolo...

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Abstract

Methods and apparatus for lighting control. One or more properties of light output of one or more LEDs (124A, 124B, 124C, 124N) of an LED node (120A, 120B, 120C, 120N) of an LED-based lighting unit (110) are controlled to extend the lifetime of the LED-based lighting unit. For example, an LED node controller controlling an LED may determine whether the LED will be operated in the active light emitting state based on an LED activation probability. Thus, based on the LED activation probability the LED may at some times be in the active light emitting state and provide light output and may at other times be prevented from being in the active light emitting state and prevented from providing light output.

Description

technical field [0001] The present invention relates generally to lighting control. More specifically, various inventive methods and apparatus disclosed herein relate to controlling one or more properties of the light output of one or more LEDs of an LED node to extend the lifetime of an LED-based lighting unit. Background technique [0002] Digital lighting technology, that is, lighting based on semiconductor light sources such as light-emitting diodes (LEDs), offers a viable alternative to traditional fluorescent, HID, and incandescent lamps. Functional advantages and benefits of LEDs include high energy conversion and optical efficiency, durability, lower operating costs, and many others. Recent advances in LED technology provide efficient and robust full-spectrum lighting sources that enable various lighting effects in many applications. Some luminaires embodying these sources feature lighting modules that include one or more LEDs capable of producing different colors,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B33/08H05B44/00
CPCH05B47/19H05B45/56H05B45/12H05B44/00H05B47/16
Inventor D.V.阿里亚克塞耶尤P.S.纽顿T.德克B.M.范德斯休斯
Owner SIGNIFY HLDG BV
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