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Lighting system with reduced melanopsin spectral content

A technology of melanopsin and content, applied in the field of light-emitting devices

Active Publication Date: 2022-02-15
LUMILEDS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The emission spectrum associated with such existing LEDs as the 4000 K / 70 LED has significantly more blue spectral content than some of the prior art they replace (e.g. high pressure sodium lighting), which has led to recent discussions on Concerns about their impact on human physiology, and in particular circadian rhythms

Method used

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  • Lighting system with reduced melanopsin spectral content
  • Lighting system with reduced melanopsin spectral content
  • Lighting system with reduced melanopsin spectral content

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Embodiment Construction

[0010] The human circadian rhythm is a twenty-four hour cycle of human physiological processes and includes any biological process that exhibits endogenous and entrainable oscillations. Induction is the interaction between circadian rhythms and the environment, such as the induction of circadian rhythms towards a daily light-dark cycle determined by the Earth's rotation.

[0011] Light-triggered rhythm induction and other nonvisual responses to light are influenced by a different photoreceptor in the eye, the intrinsically photosensitive retinal ganglion cells (ipRGCs), in addition to the regular rods and cones . Together, these responses can produce a daytime-like physiological state. For example, light constricts pupils, suppresses pineal melatonin production, increases heart rate and core body temperature, stimulates cortisol production, and acts as a neurophysiological stimulant.

[0012] Empirical evidence has shown that these non-visual responses generally have a peak ...

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PUM

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Abstract

The disclosed light emitting devices can provide white light with a cyan break consistent with the melanopsin sensitivity range, and thus have reduced melanopsin content. The disclosed light emitting devices can include a light source that provides violet or blue light having a peak wavelength less than 450 nanometers (nm). The disclosed light emitting device may include at least one down-converter coupled to and downstream of the light source and configured with a long wavelength onset to convert the spectrum of violet or blue light to generate light at 447- White light having a spectral power content in the wavelength range of 531 nm less than or equal to 10% of the total spectral power content in the wavelength range of 380‑780 nm. The disclosed light emitting device can be incorporated into a light engine system that also includes a control system that controls drive current to the light emitting device.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of US Provisional Application No. 62 / 393306, filed September 12, 2016, which is incorporated by reference as if fully set forth. technical field [0003] The disclosure herein generally relates to light emitting devices with improved non-visual response. Background technique [0004] Light emitting diodes (LEDs) are semiconductor light emitters used as light sources in a variety of applications such as display lights, warning lights, indicator lights, or other applications where white or colored light is desired. The color of light produced by an LED is determined at least in part by the type of semiconductor material used in its manufacture. For LEDs used in general lighting applications such as general or ambient lighting, the emission spectrum (i.e., the relationship between the intensity of light and its wavelength) can be the preferred color on the one hand due to the limitatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L33/50C09K11/08C09K11/77
CPCH01L33/502H05B45/20Y02B20/00C09K11/77347C09K11/77348H01L33/505F21K9/64F21V23/003H01S5/0087F21Y2115/10A61M21/00A61M2021/0044H01L27/156
Inventor W.A.苏尔O.B.什切金H-H.贝赫特尔
Owner LUMILEDS
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