Circadian lighting for medium light levels

By adjusting the radiant flux and spectral power distribution through the light generation system, the problem of melatonin production being suppressed under different intensities and spectra of existing light sources has been solved, achieving the effect of promoting sleep at low intensities and maintaining alertness at high intensities.

CN117716796BActive Publication Date: 2025-12-12SIGNIFY HOLDING BV
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Patent Information

Application Number
CN202280052080.8
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Priority Date
2021-07-27
Filing Date
2022-07-18
Publication Date
2025-12-12
Estimated Expiration
2042-07-18

AI Technical Summary

Technical Problem

Existing light sources are difficult to effectively adjust under different intensities and spectra, which leads to the suppression of melatonin production, affecting sleep quality, and failing to provide adequate lighting conditions when alertness is required.

Method used

A light generation system is provided, including a light generation device and a control system, which can adjust the radiant flux and spectral power distribution in different operating modes to promote sleep or maintain alertness by controlling the ratio of light from the device (B/Y), such as switching from high radiant flux to low radiant flux.

Benefits of technology

It provides light that does not suppress melatonin at low intensity to promote sleep, while maintaining alertness at high intensity. By adjusting the spectral power distribution and radiant flux, it meets the lighting needs of different scenarios.

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Abstract

The invention provides a light generating system (1000) comprising: (i) a light generating device (100) configured to generate device light (101) having a controllable radiant flux and a controllable spectral power distribution; and (ii) a control system (300) configured to control the radiant flux and the spectral power distribution of the device light (101); wherein: (A) a ratio B / Y of the device light (101) is defined as a ratio of a radiant flux of the device light (101) in a 450-500 nm wavelength range to a radiant flux of the device light (101) in a 550-600 nm wavelength range; (B) in a first operating mode of the light generating system (1000), the control system (300) is configured to change from a first device light setting to a second device light setting different from the first device light setting; (C) the first device light setting and the second device light setting are selected from: (a) a high radiant flux first setting (SI) in which the device light (101) is a first light having a first radiant flux II and a first B / Y ratio Rl; and (b) a low radiant flux second setting (S2) in which the device light (101) is a second light having a second radiant flux I2 and a second B / Y ratio R2; and (D) I2 < II, and Rl < R2.
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