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Led-based luminaire utilizing optical feedback color and intensity control scheme

A technology for lighting equipment and control equipment, applied in lighting devices, light sources, electric light sources, etc., can solve the problem of inability to maintain intensity and/or color, and achieve the effect of uniform color/intensity

Inactive Publication Date: 2007-08-08
HONEYWELL INT INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, traditional lighting devices based on solid state sources cannot maintain desired intensity and / or color during their lifetime

Method used

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  • Led-based luminaire utilizing optical feedback color and intensity control scheme
  • Led-based luminaire utilizing optical feedback color and intensity control scheme
  • Led-based luminaire utilizing optical feedback color and intensity control scheme

Examples

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Embodiment Construction

[0014] According to an exemplary embodiment, the present invention relates to a lighting device with a light emitting diode (LED)-based light source, which receives feedback from a light sensor to maintain the output of the lighting device at a desired level. In an exemplary embodiment, the luminaire uses this feedback to adjust the current delivered to the LED in the luminaire to ensure that the output maintains the desired intensity and / or color, regardless of LED temperature changes and cavity degradation.

[0015] Various aspects of these components are described in FIGS. 1A-1C according to exemplary embodiments. More specifically, FIG. 1A depicts a cross-sectional view of the lighting device 100 according to an exemplary embodiment. FIG. 1B depicts the linear portion of the assembled lighting device 100, and FIG. 1C depicts an exploded view of various components in the lighting device 100.

[0016] As shown in FIGS. 1A-1C, the lighting device 100 includes a housing 10, a ligh...

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PUM

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Abstract

A system and method for implementing an LEA-based luminaire (100) Incorporates one or more color channels (32-n). The luminaire includes a controller (50) that uses optical sensing and feedback to control LEDs (30A) in each channel to deliver a consistent intensity and / or color output. The optical feedback loop may provide measured intensity and / or color of the luminaire's output to the luminaire controller. The controller may then adjust the current, pulse width modulation (PWM) duty cycle, or both, which are delivered to discrete color channels of the luminaire to obtain the desired intensity and / or color.

Description

[0001] Cross-references to related applications [0001] This non-provisional application claims the priority of U.S. Provisional Application No. 60 / 585524 filed on July 6, 2004 in accordance with 35 U.S.C. §119(e), the entire content of which is incorporated herein by reference. Technical field [0002] The present invention relates to a light feedback control system and solution for lighting equipment in lighting applications based on solid-state light sources. Background technique [0003] Solid-state light sources provide benefits for traditional incandescent and fluorescent lamps in certain applications. The robustness, reliability, and long lifetime of light emitting diodes (LEDs) are examples of these benefits. Currently, the intensity output of solid-state light sources, such as LEDs, changes according to factors such as temperature, service life, and manufacturing date. Therefore, traditional lighting devices based on solid-state sources cannot maintain the desired intensi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B33/08H05B44/00
CPCY02B20/345
Inventor J·M·辛格M·T·范格尔S·M·布奇B·J·巴恩哈特
Owner HONEYWELL INT INC
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