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Low-pressure gas discharge lamp for influencing the natural melatonin balance

A low-pressure gas, melatonin technology, used in biological/medical applications, can solve problems such as poor color reproduction

Inactive Publication Date: 2011-03-30
MERCK PATENT GMBH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of using this type of narrowband light is that there is no good color reproduction, which is important for visual tasks

Method used

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  • Low-pressure gas discharge lamp for influencing the natural melatonin balance
  • Low-pressure gas discharge lamp for influencing the natural melatonin balance
  • Low-pressure gas discharge lamp for influencing the natural melatonin balance

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0042] Eu-activated alkaline earth orthosilicates were used as blue-absorbing phosphors in the discharge vessel of an LT 18W low-pressure gas discharge lamp.

[0043] The base layer was formed by coating the blue light absorbing phosphor to the inside of a glass bottle as a suspension with hydroxyethylcellulose as the binder and dimethylolurea as the crosslinker. The layer thickness of the base layer is according to the invention at 0.2 mg / cm 2 and 2.0mg / cm 2 Between, preferably 1.25mg / cm 2 .

[0044] The coating used for the second layer as the top layer was a phosphor mixture comprising the narrow-band red-emitting phosphor yttrium oxide:Eu(YOX) and the narrow-band green-emitting phosphor lanthanum phosphate:Ce,Tb(LAP) As a suspension with polyethylene oxide as a binder. The phosphor mixture comprises 60% to 99% phosphor YOX ​​and 1% to 40% phosphor LAP, preferably 85% phosphor YOX ​​and 15% phosphor LAP.

[0045] The layer thickness of the top layer is according to the...

example 2

[0053] The coating of glass bottles of LT 18W low-pressure gas discharge lamps was carried out with the phosphor YAG as base layer. The application of the top layer was carried out analogously to Example 1.

[0054] The following technical optical parameters were achieved with the LT 18W low-pressure gas discharge lamp manufactured in this way:

[0055] Luminous flux: 1408lm

[0056] Lamp power: 18.0W

[0057] Color temperature: 1995K

[0058] Color reproduction: 81.3

[0059] The luminous flux is based on the figure 2 The maximum wavelength shown is 550nm for the evaluation of the spectral brightness sensitivity curve V(λ). In order to characterize the melatonin secretion of the low-pressure gas discharge lamp according to the invention, the circadian rhythm influence factor is used, which is obtained by the integral product of the irradiance intensity and the circadian rhythm action function c(λ) and the irradiance intensity and the spectral brightness sensitivity It ...

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Abstract

The invention relates to a low-pressure gas discharge lamp influencing the biological circadian rhythm by controlling melatonin secretion by means of the light thereof in the red spectral range. The tube-shaped glass discharge vessel, which can also be formed as a double helix, is filled with a noble gas or noble gas mixture and mercury. Electrodes for infeeding energy are disposed at both ends of the discharge vessel. The discharge vessel is coated on the inside in multiple layers by successively applied fluorescent layers. The first fluorescent layer is made of an illuminant excited by the ultraviolet mercury radiation between 180 nm and 400 nm, and by the blue radiation between 400 nm and 490 nm emitted by the mercury discharge, and by the emitted visible radiation of the second or further fluorescent layer between 400 and 550 nm, wherein visible light having emissions maxima in the range from 500 nm to 650 nm is generated. Together with light sources for melatonin suppression, the low-pressure gas discharge lamp, having warm light thereof, is particularly suitable for simulating the quasi-circadian rhythm of an individual when external conditions, such as sunlight, are missing. Due to the good color reproduction and high energy efficiency thereof, it meets all necessary requirements of a light source for illumination tasks, and is therefore also suitable for general lighting.

Description

technical field [0001] The present invention relates to a low-pressure gas discharge lamp for influencing the balance of endogenous melatonin, preferably suitable for biological / medical applications. The aim is to specifically influence the biological circadian rhythm by controlling melatonin secretion by means of the light source according to the invention. Background technique [0002] Known from medicine, virtually all human processes undergo biological functions. One of these functions is the circadian function, which affects melatonin secretion. Melatonin is a sleep hormone that is produced from serotonin, excreted by pineal gland cells in the pineal gland (epiphysis) that is part of the diencephalon, and controls the body's day / night rhythm. In the chemical sense, it is an alkaloid with a tryptamine structure. [0003] "The influence of different wavelengths of light on human biological rhythms" published by Morita, Tekeshi and Tokura in Appl Human Sci, 17(3):91-96,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J61/42
CPCA61N5/0618C09K11/7774C09K11/7734A61N2005/0662H01J61/48A61N2005/0654H01J61/42C09K11/7792C09K11/77342
Inventor W·特夫斯G·罗斯J·梅尔特克H-J·沃尔特尔
Owner MERCK PATENT GMBH
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