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Light-emitting diode-based lighting system with time-division ambient light feedback response

A technology of ambient light and time, applied to lighting devices, electroluminescent light sources, light sources, etc., can solve the problem of inaccurate description of the brightness of light 110

Active Publication Date: 2016-05-11
SIGNIFY HLDG BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Because the ambient light sensed by ambient light sensor 112 includes the effects of artificial light 110, light capture by lighting system 100 cannot accurately account for the brightness of light 110

Method used

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  • Light-emitting diode-based lighting system with time-division ambient light feedback response
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  • Light-emitting diode-based lighting system with time-division ambient light feedback response

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Embodiment Construction

[0028] In at least one embodiment, the lighting system includes time-split light output sensing and adjustment for ambient light. In at least one embodiment, time-split optical output sensing involves modulating power to a set of LEDs, the set of LEDs including one or more LEDs. In at least one embodiment, each LED of the LED group is included in a single lamp, and in at least one embodiment, the LED group is included in multiple lamps. In at least one embodiment, for each lamp, the controller selectively reduces the current to the LED group by a time division algorithm to modulate the power to the LED group, thereby allowing the light sensor to sense with reduced impact from the LED group The brightness of the ambient light. In at least one embodiment, the power can be reduced by reducing the current to zero, thus turning each LED "off" in the lamp, or the power can be reduced to a value greater than zero. In at least one embodiment, the controller compares the determined b...

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Abstract

A lighting system includes time-divided light output sensing and adjustment for ambient light. In at least one embodiment, the temporal light output sensing involves adjusting power to a set of light emitting diodes (LEDs), and the set of LEDs includes one or more LEDs. In at least one embodiment, each LED in a group of LEDs is contained within a single lamp, and in at least one embodiment, groups of LEDs are contained in multiple lamps. In at least one embodiment, for each lamp, the controller modulates the power delivered to the LED bank by selectively reducing the power delivered to the LED bank using a time-division algorithm, thereby allowing the light sensor to sense light with the reduced influence of the LED bank. Measure the brightness of ambient light. In at least one embodiment, the lighting system further includes time-divided light output sensing and adjustment for LEDs of different spectra.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS [0002] Pursuant to 35 U.S.C. §119(e), this application claims the benefit of US Provisional Application 61 / 122,198, filed December 12, 2008, entitled "inglePhoto-DetectorforColorBalanceofMultipleLEDSources". US Provisional Application 61 / 122,198, which includes exemplary systems and methods, is incorporated herein by reference in its entirety. technical field [0003] The present invention relates generally to the fields of lighting and signal processing, and more particularly, to systems and methods for time-split light output sensing and regulation of light emitting diodes of different spectra. Background technique [0004] Part of the reason light emitting diodes (LEDs) are becoming particularly popular as mainstream light sources is energy savings through high efficiency light output as well as environmental motivations such as mercury reduction. An LED is a semiconductor device that is driven by direct current. The brig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/34H05B44/00
CPCH05B45/22H05B45/20H05B45/28H05B47/11H05B47/175Y02B20/40H05B47/198
Inventor 威廉·A·德雷珀约翰·L·梅兰松
Owner SIGNIFY HLDG BV