LT6215B - PHOTOBIOLOGICAL FRIENDLY CONVERSION PHOSPHORUS LIGHT - Google Patents

Abstract

The proposed low associated color temperature conversion in phosphorus light source has characteristic low non-visual photo biological effect on human, which manifests as inhibition of emission of melatonin in pineal gland and can be used for lighting of streets, parking lots, pedestrian and bicycle paths, building facades, monuments, parks, car parking lots and houses yards, weakly disturbing human circadian rhythm. The light source has a semiconductor chip emitting short wavelength light in blue, purple or close to UV region due to injection luminescence, and has a wavelength converter, which because of luminescence converts said short wavelength light into longer wavelength light which comprises orange color component having spectral peak at about 570 nm and 600 nm. Partial conversion light source chip generates blue light, where part of said blue light is converted by using one phosphorus in the converter into orange light, where said phosphorus is such as yttrium magnesium aluminum silicon garnet, activated trivalent cerium ions (Y3Mg2AlSi2O12:Ce3+), barium strontium silicon nitride, activated divalent europium ions ((Ba,Sr)2Si5N8:Eu2+), barium strontium orthosilicate, activated divalent europium ions ((Ba,Sr)SiO4:Eu2+), calcium - alpha-silicon aluminum oxynitrides, europium activated divalent ions (Ca-?-SiAlON:Eu2+) or calcium, strontium selenide activated divalent europium ions ((Ca,Sr)Se:Eu2+)). The total convention light source chip generates close to UV light, which in the converter is totally absorbed and is converted by blue (such as CaMgSi2O6:Eu2+, Ba5SiO4Cl6:Eu2+, Mg3Ca3(PO4)4:Eu2+, (Ca,Sr,Ba)5(PO4)3Cl:Eu2+, Ca2B5O9(Br,Cl):Eu2+, BaMgAl10O17:Eu2+,Mn2+, BaMg2Al16O27:Eu2+, (Lu,Gd)2SiO5:Ce3+, Sr2P2O7:Sn2+, SrSiAl2O3N2:Ce3+ or La3Si6N11:Ce3+) and said orange phosphorus.

Description

Technical field

The present invention relates to light sources having a spectral spectrum suitable for outdoor illumination and having little interference with the human circadian rhythm, more particularly, the present invention discloses LEDs consisting of a shortwave emitting semiconductor electroluminescent structure and an inorganic phosphor generating an orange component of spectral power.

Definitions:

CIE - International Commission on Illumination (Commission Internationale de l'Eclairage);

CIE standard luminaire A is a spectral power distribution corresponding to black body radiation at 2856 K.

CPF - Circadian Effect Factor (ratio of non-visual circadian efficacy of radiation to luminous efficacy);

Phosphorus is a substance that converts radiation of a shorter wavelength into radiation of a longer wavelength (otherwise known as a luminophore);

"Flame light" means a light of low coupled color temperature (<2500 K) with a color similar to that of black body radiation;

SAR - color rendering index;

SGS - spectral power distribution;

SST - associated color temperature;

LED - LED;

Description of the Related Art

In the case of daylight use in the dark, the effects of light on the human circadian rhythm should be taken into account. Human beings, like every mammal, have their own circadian rhythm that regulates the human sleep and wakeful phase [D. Lang, Energy efficient illumination for biological clock, Proc. of SPIE 7954, p. 795402-1-12 (2011)]. Already in the last century, the human circadian rhythm has been associated with illumination, and in 2001 it was discovered that this rhythm is regulated by ganglion cells in the lower retina of the eye [G. C. Brainard, J. P Hanifin, J. M. Greeson, B. Byrne, G. Glickman, E. Gerner,

M. D. Rollag, Action spectrum for melatonin regulation in humans: Evidence for a novel circadian photoreceptor, J. Neurosci. 21 (16), p. 6405-6412 (2001); K. Thapan, J. Arendt, D. J. Skene, An action spectrum for melatonin suppression: evidence for a novel non-rod, non-cone photoreceptor system in humans, J. Physiol. 535 (1), p. 261267 (2001). These cells are non-imaging photoreceptors that, together with the cerebellar nucleus and the pineal gland, form the non-imaging pathway for circadian rhythm regulation.

When the eye is illuminated with blue light, especially from above, these ganglion cells generate a signal to the cerebellar nucleus in the brain, which inhibits the release of melatonin (a sleep hormone and a natural oncostatic agent) in the pineal gland. This makes people feel active in high light during the day or in the morning. Meanwhile, in the evening, when the sun goes down, melatonin release is not suppressed and people get ready for sleep. Research has shown that disturbance of circadian rhythm and inhibition of melatonin release in the evening can cause a variety of medical conditions, such as increased risk of cancer [S. Davis, D. K. Mirick, Circadian Disruption, Shift Work, and the Risk of Cancer: A Summary of Evidence and Studies in Seattle, Cancer Causes Control 17 (4), p. 539-545 (2006)]. Therefore, it is important to ensure that the light used to illuminate the streets, parking lots, pedestrian and bicycle paths, building facades, monuments, parks, parking lots and home yards in the evening and in the first half of the night does not have a significant circadian effect. U.S. Patent No. 6,498,429 discloses a high-pressure sodium lamp and U.S. Patent 4,401,914 a low-pressure sodium vapor lamp. These discharge lamps are showers, have a slow ignition time and relatively low luminous efficacy, and contain toxic and chemically aggressive substances. High- and low-pressure sodium vapor lamps have low SST and low circadian effects, but have poor color rendering due to their poor and structured spectrum.

U.S. Patent No. 2,001,501 discloses a mercury vapor lamp. The radiation of this lamp is characterized by high radiation flux in the blue region and strongly influences the human circadian rhythm, and at low ambient luminance, high SST can cause visual discomfort [A. A. Kruithof, Tabular luminescence lamps forgeneral illumination, Philips Tech. Rev. 6, p. 65-73 (1941).].

U.S. Patent No. 6,504,179 discloses a tricolor phosphor conversion lamp consisting of a semiconductor chip emitting light in the wavelength range of 300 to 470 nm, a portion of which is converted to green light in European-activated calcium magnesium chlorosilicate phosphorus and yellow light in cerium-activated rare earth. The combination of these three colors is perceived by the person as white light, but is not optimal for photobiologically friendly street lighting, for the following reasons:

the SGS of an optimum photobiologically friendly LED consists of two spectral components, and the patent describes an SGS lamp consisting of three spectral components;

the phosphor composition of the luminaire is not selected so that the SGS is optimal for outdoor illumination with minimal circadian impact factor.

U.S. Patent No. 6,501,102 discloses a tricolor phosphor conversion lamp consisting of a semiconductor chip emitting light of less than 460 nm, which is converted to secondary and tertiary radiation in phosphorus, at least one of which is a compound of yttrium alumina. , strontium gallium sulfide, yttrium aluminum lanthanum oxide compound, yttrium aluminum lanthanum gallium oxide compound, strontium sulfide and nitridosilicate. The combination of these three colors is perceived by the person as white light, but is not optimal for photobiologically friendly street lighting, for the following reasons:

the SGS of an optimum photobiologically friendly LED consists of two spectral components, and the patent describes an SGS lamp consisting of three spectral components;

the phosphor composition of the luminaire is not selected so that the SGS is optimal for outdoor illumination with minimal circadian impact factor.

U.S. Patent No. 6,294,800 discloses a phosphor having a chemical composition of Ca8Mg (SiO4) 4Cl2: Eu ²⁺ , Mn ^2+, and a tricolor phosphor conversion lamp consisting of a semiconductor chip emitting light at a wavelength in the range of 330-420 nm (Ca8Mg). SiO4) 4Cl2'.Eu ²⁺ , Mn ²⁺ phosphorus, where part of the initial radiation is converted to green light, Y2C> 3: Eu ³⁺ , Bi ³⁺ phosphorus, where part of the initial radiation is converted to red light, and BaMg2Ali6O27: Eu ²⁺ or (Sr, Ba, Ca) ₅ (PO4) 3CI: Eu ²⁺ phosphorus, in which part of the initial radiation is converted into blue light. The combination of these three colors is perceived by the person as white light, but is not optimal for photobiologically friendly street lighting, for the following reasons:

the SGS of an optimum photobiologically friendly LED consists of two spectral components, and the patent describes an SGS lamp consisting of three spectral components;

the phosphor composition of the luminaire is not selected so that the SGS is optimal for outdoor illumination with minimal circadian impact factor.

U.S. Patent No. 6,084,250 discloses a tricolor phosphor conversion LED consisting of a GaN light emitting in the ultraviolet region, having a peak wavelength between 300 and 370 nm, and a blue BaMgAI ₁₀ Oi ₇ : Eu ²⁺ phosphor in which the original radiation is converted to radiation. the peak is in the range 430-490 nm, of crude ZnS: Cu phosphorus, which converts the original radiation into a beam having a peak in the range 520-570 nm, and the red Y ₂ O ₂ S phosphorus, which converts the original radiation to the radiation, which is 590- At 630 nm. The combination of these three colors is perceived by the person as white light, but is not optimal for photobiologically friendly street lighting, for the following reasons:

the SGS of an optimum photobiologically friendly LED consists of two spectral components, and the patent describes an SGS lamp consisting of three spectral components;

the phosphor composition of the luminaire is not selected so that the SGS is optimal for outdoor illumination with minimal circadian impact factor.

U.S. Pat. No. 5,851,063 describes a matrix of purely electroluminescent LEDs of different colors, which are intended to obtain the desired light source SGS). However, such arrays require the sophisticated topology required for the arrangement of the different groups of lights. In addition, purely electroluminescent LEDs of different colors are powered by different currents, which requires a greater number of control channels and more sophisticated electronic circuits than phosphor conversion, where the electroluminescent structure is the same in all lamps.

The main prototype of the present invention is described in U.S. Patent No. 5,998,925. The luminaire described in this patent consists of a semiconductor light emitting component and a phosphor. In this case, the semiconductor chip is composed of ln / Ga / M & N (0 <i, 0 £ j, 0 <k, and i + j + k = 1), and phosphorus is a grenade activated material containing at least one element of cerium. of the two groups consisting of elements of Y, Lu, Se, La, Gd, Sm and Al, Ga, In. The semiconductor chip emits excitation light in the wavelength range 400-530 nm, and the photoluminescence of the phosphor is selected so that its spectral peak wavelength is greater than the excitation light. However, the use of such luminaires in outdoor lighting does not avoid the following disadvantages:

the SGS of the luminaire is not optimized to minimize the circadian effect factor of the emitted light, i.e. in the evening or at night, the negative impact on human organism is minimized;

the phosphor composition of the luminaire is not selected so that the SGS is optimal for outdoor illumination with minimal circadian impact factor.

In order to reduce the non-visual effects of outdoor lighting and avoid complex design and electronics, it is possible to use phosphorus solid-state light sources with several non-visual circadian effects optimized for phosphorus conversion for mesopic vision (when the average luminance varies between 0.01 and 10 cd / m ² ). times smaller than that of ordinary daylight [A. Žukauskas, R. Vaicekauskas, P. Vitta, Optimization of Solid State Lamps for Photobiologically Friendly Mesopic Lighting, Appl. Optics 51 (35), p. 8423-8432 (2012)]. This source presents the concept of a two-color light source with optimized LED model LEDs with the lowest non-visual effect and the highest light efficiency in the mesopic area. Such sources exhibit moderate color rendering, which is suitable for many outdoor lighting applications due to reduced color discrimination at dusk.

The invention discloses a low coupled color temperature (flame light) illuminator having a spectral power distribution composed of blue and orange components. These components have peak wavelengths and beam flux ratios so selected that the excitation ratio between the extracellular photoreceptors that regulate circadian rhythm of the eye and the visual photoreceptors that cause visual perception is the lowest. In this way, the least disturbance of the human circadian rhythm is achieved. The ratio of the spectral components of the spectral flux can be determined by varying the current feeding to the electroluminescent structure or by selecting the size and concentration of phosphor particles, the wavelength transducer thickness, the refractive index of the wavelength transducer and the position of the electroluminescent structure and wavelength transducer outside the luminaire housing.

Such phosphor conversion lamps can be used for a variety of outdoor lighting applications (street, courtyard, pedestrian and bicycle paths, home facades, monuments, parks, parking lots and home yards) in the evenings and in the first half of the night.

The essence of the invention

It is an object of the present invention to provide a small non-visual photobiological conversion phosphor illuminator in which a partial conversion of blue light or near-ultraviolet (UV) light in a wavelength converter is used such that the resulting light has a spectral component with a peak at 570-600 nm. spectral component with a peak in the 400-500 nm wavelength range, and the ratio of the beam flux would be such that the color coordinates of the luminescence spectrum correspond to the absolute black body radiation in the low (15003000 K) SST region.

The object of the present invention is achieved by a two-color (blue-orange) illuminator having a semiconductor chip which, due to injection electroluminescence and photoluminescence, generates a shorter wavelength than 500 nm for converting said radiation into longer wavelengths which has one type (for partial conversion) or two types (for complete conversion) of phosphorus particles. What's new is that the LED emits a mixture of blue and orange light in the transducer containing one of the orange phosphores listed below. This orange component, together with the blue component, forms a SGS of flaming light with low non-visual circadian exposure in humans. The phosphorus emitted in the orange spectral region may be as follows:

- Yttrium magnesium aluminum silicon garnet activated by trivalent cerium ions Y ₃ Mg ₂ AISi ₂ O ₁₂ : Ce ³⁺ ,

- barium strontium silicon nitride activated by divalent europium ions (Ba, Sr) ₂ Si ₅ N ₈ : Eu ²⁺ ,

- barium strontium orthosilicate activated by divalent europium ions

Ba (Ba, Sr) SiO4'.Eu ²⁺ ,

- calcium-alpha-silicon aluminum oxynitride doped with divalent europium ions Ca-a-SiAION: Eu ²⁺ ,

- Calcium strontium selenide doped with divalent europium ions (Ca, Sr) Se: Eu ²⁺ .

In the case of partial conversion, the semiconductor chip generates blue light in the 400-500 nm spectrum and the converter contains phosphorus, which is characterized by the partial conversion of this light into longer-wave (orange) light. In this case, the semiconductor chip has an active layer made of ln _x Ga _x N semiconductor alloy.

In the case of full conversion, the semiconductor chip generates near-UV or blue (violet) light with a wavelength of less than 450 nm, and the converter has a second phosphor that exhibits luminescence in the 400-500 nm spectral band and can be an oxide, halo, or nitride compound, activated by divalent europium, divalent manganese, divalent tin, or trivalent cerium ions. In this case, the semiconductor chip has an active layer made of a GaN semiconductor compound, or an ln _x Ga- _x N, Al _y Ga- _y N or Al _y ln _x Ga- _x - _y N semiconductor alloy.

In any of the above cases where the LED emits multiple spectral components, the spectral flux and wavelengths of each spectral component are selected such that the final spectral composition of the emitted light is suitable for photobiologically friendly field illumination, that is, its color corresponds to low temperature (1500 - 3000 K) radiation, and SGS would have a relatively low non-visual circadian effect.

The low non-visual circadian effect is a SGS whose blue-spectrum component has a fluorescence of orange spectrum that is not greater than 1:17 for partial conversion LEDs and less than 1:15 for full-conversion LEDs with SST = 2000 K, and up to 1: 5 for partial conversion LEDs and up to 1: 4 for full conversion LED, SST = 3000 K

The ratio of the radiation flux components is determined by selecting the size and concentration of the phosphor particles, the wavelength transducer thickness, the refractive index of the wavelength transducer material, the distance between the wavelength transducer and the electroluminescent structure and the wavelength transducer position inside the luminaire housing.

In the case of an optically small non-visual illuminator, the light spectrum components generated have the following wavelengths:

about 585 ± 20 nm for the orange spectrum component and about 450 ± 20 nm for the blue spectrum component.

Brief description of the drawings:

Fig. - photopic and scotopic functions of spectral luminous efficiency and spectral circadian efficiency;

Fig. - a basic arrangement of a partial conversion of blue light into phosphor for a photobiologically friendly field illumination (100);

Fig. - a basic arrangement of a complete conversion of dipped-UV light in a phosphor for a photobiologically friendly outdoor illumination (200);

Fig. - Typical electroluminescence spectra of a semiconductor chip with an InGaN active layer: (a) 450 nm blue emitter; (b) 365 nm emitter in the near UV region;

Fig. - Typical photoluminescence spectra of inorganic phosphorus: (a) orange emitter; (b) blue emitter;

Fig. - SGS for phosphorus conversion flame light fittings for photobiologically friendly outdoor illumination: (a) orange phosphor partial conversion: Y ₃ Mg ₂ AISi ₂ 0i ₂ : Ce ³⁺ , (Ba, Sr) 2Si5N8: Eu ²⁺ , ( Ba, Sr) 2SiC> 4: Eu ²⁺ , Ca-aSiAION: Eu ²⁺ , (Ca, Sr) Se: Eu ²⁺ ; (b) Complete conversion lamp with blue BaMg2AI16O27: Eu ²⁺ and orange Y3Mg ₂ AISi ₂ 0i ₂ : Ce ³⁺ phosphor.

Detailed Description of the Invention

With the development of energy efficient smart lighting systems, semiconductor LEDs are increasingly being used in outdoor lighting. They are efficient, durable, have the flexibility to select the required SGS, can be switched quickly and smoothly, have no sudden burnout, require no high power supply, and are compatible with computer control technologies.

The proposed two-component flameproof luminaire has a low non-visual circular effect, which SGS is optimized for light efficiency. Since the luminous efficiency of a light source is the product of the luminous efficiency of the light generated and the luminous efficiency of the source, optimization based on the luminous efficiency, which depends solely on SGS, is universal. Meanwhile, the luminous efficiency of the LEDs depends on the injection efficiency, the internal quantum efficiency, the light escape efficiency and the series impedance - i.e. parameters that are constantly improving with the development of LED technology [P. Mottier, LEDs for Lighting Applications, John Wiley & Sons, Ine, London, (2009)].

For photopic (day) vision, the luminous efficacy is:

where S (4) is the SGS of the illuminator, Λ is the wavelength, and V (A) is the spectral luminous efficacy of photopic vision as defined by CIE in 1924, which is the maximum possible luminous efficacy value of 683 lm / W for photopic vision.

Photopic vision occurs in environments with average (adaptive) luminance greater than 10 cd / m ² . Under these conditions, the visual sensation is determined by the three types of photoreceptors in the retina of the eye - cones, so photopic vision is color-coded. When the luminance values of the adaptations do not exceed 0.01 cd / m ² , the visual sensation is caused by one type of photoreceptor, the stems, so at low luminance values the ability to distinguish colors is lost. In this case, the sensitivity function of the eye is described by the spectral luminous efficiency function V '(A) of the scotopic vision defined in CIE 1951. The maximum possible light efficiency for scopic vision is 1700 lm / W. The spectral luminous efficiency functions for photopic and scopic vision are shown in Fig. 1.

The proposed outdoor lighting luminaire is optimized for intermediate, mesopic, vision with an average luminance of between 0.01 cd / m ² and 10 cd / m ² . This luminance range covers the range of 0.1 cd / m ² to 2 cd / m ² used for street and pedestrian areas. In this case, the visual sensation is determined by both the stalks and the cones, the color difference is less pronounced, and the mesopic spectral luminous efficiency function \ Z _mes (4) depends on the luminance of the environment. The spectral sensitivity of mesopic vision is intricately dependent on the luminance of the adaptation and is described in various models. This is based on the CIE recommended MES-2 photometric system [Commission Internationale de l'Eclairage, Recommended system for mesopic photometry based on visual performance, Pub. CIE 191: 2010.]. Under this system, the spectral luminous efficacy function of mesopic vision is expressed as follows:

[zwK (2> (i- (2) where M (m) is the rationing function and m is the luminance multiplier. For mesopic vision, the luminous efficacy is calculated as follows:

^Λ we ^Λ mesO

J SŲ.yl /.

Here, the maximum possible mesopic luminous efficacy K _me so depends on the luminance of the environment and varies from 1700 lm / W to 683 lm / W.

The ganglion cells responsible for the non-visual circadian effects of light have their spectral sensitivities, as do the image receptors. This spectral sensitivity is described by the circadian efficiency function C (4), which is depicted in Fig. 1. It is seen that the peak of this function is approximately 460 nm, so that the circadian rhythm is most affected by blue light [D. May, Circadiane LichtgroBen und deren messtechnische Ermittlung, Licht 54, p. 1292-1297 (2002).

The non-visual circadian effect of the proposed outdoor lighting fixture, estimated by calculating the Circular Effect Factor (CPF) a _me s for mesopic conditions characteristic of artificial outdoor lighting, is defined as the ratio of the non-visual circadian efficiency of radiation to the mesopic light efficiency:

_ K _c _ 7C JC (2) 5 (2) J2 '^<4) where K _c q equals 683 blm / VV [A. Žukauskas, R. Vaicekauskas, P. Vitta, Optimization of Solid State Lamps for Photobiologically Friendly Mesopic Lighting, Appl. Optics 51 (35), p. 8423-8432 (2012)].

The CPF value is suitable for comparing the non-visual circadian effects of light sources.

For outdoor outdoor lighting, the lowest value of a _{c is} desirable, since this requires the highest amount of light and the smallest circadian efficiency. The lowest CPF value is characterized by a two-color light source with a shortwave component peak at about 440-460 nm and a longwave component peak at about 570-600 nm [A. Žukauskas, R. Vaicekauskas, P. Vitta, Optimization of Solid State Lamps for Photobiologically Friendly Mesopic Lighting, Appl. Optics 51 (35), p. 8423-8432 (2012)]. The SGS of the proposed luminaire was optimized to find a minimum CPF value.

The proposed outdoor lighting luminaire is superior to conventional outdoor lighting sources (high and low pressure sodium vapor lamps) and has a color rendering capability. Color rendering can be estimated by the general color rendering index (SAR) R _a , introduced by the CIE in 1965 and revised in 1995 [Commission Internationale de l'Eclairage, Method for measuring and specifying color rendering properties, Pub. CIE 13.3: 1995]. The procedure uses 8 basic color samples; each sample is illuminated by a reference and test light source. By analyzing the reflected light spectra, a color difference is calculated, which is used to find a specific color rendering index for each sample. The average SAR of the following eight specific color recovery rates is obtained:

R = 100-4,6 where ΔΕ is the mean color shift of the eight color samples at CIE 1964. color space [Commission Internationale de l'Eclairage, Method of measuring and specifying color rendering properties of light sources, pub. CIE 13.3: 1995]. The SAR value is 100 at the maximum and is characterized by incandescent and halogen lamps. In the field of mesopic luminance, the ability of a person to distinguish colors is known to be impaired [WRJ Brown, J. Opt. Soc. Am. 41, p. 684-688 (1951)], so the mesopic SAR F? _a , we may be described a little differently and depend on the luminance [A. Žukauskas, R. Vaicekauskas, P. Vitta, Optimization of Solid State Lamps for Photobiologically Friendly Mesopic Lighting, Appl. Optics 51 (35), p. 8423-8432 (2012)]:

^ _mes = 100-4.6y (Z _mes ) J £, ₍₆₎ where y is a coefficient dependent on the ambient luminance L _mes .

The proposed illuminator (100, 200) is comprised of a semiconductor chip (1, 11), thanks to electroluminescence injection, which generates shortwave radiation at a wavelength of less than 500 nm, which is contained in a reflector cup (2, 12) and connected to the terminals (3, 13). ) using wire (4, 14). The chip (1, 11) is covered by a wavelength transducer (5, 15) enclosed in a transparent housing (6, 16). Said transducer is for converting said shortwave radiation into longer-wave radiation due to photoluminescence to obtain photons (10, 20, 22), where it contains one type of phosphor particles (7) for partial conversion and two types of phosphor particles for complete conversion. (17.18).

The proposed blue light partial conversion phosphor illuminator (100) has a semiconductor chip (1) emitting blue light in a 400-500 nm spectral band that is aligned with the phosphor absorption spectrum of the transducer (5). A certain portion of the primary flux is converted by suitable phosphorus (7) to orange light, in the 570-600 nm spectral band. Such phosphorus may be yttrium magnesium aluminum silicon garnet activated by trivalent cerium ions (Y3Mg2AISi2O12.Ce ³ *), barium strontium silicon nitride activated by divalent europium ions ((Ba, Sr) 2Si5N8: Eu ²⁺ ), barium strontium activated ortho europium ions ((Ba, Sr) SiO4: Eu ²⁺ ), calcium-alpha silicon aluminum oxide nitride doped with divalent europium ions (Ca-a-SiAION: Eu ²⁺ ) or calcium strontium selenide doped with divalent europium ions ((Ca, Sr) Se: Eu ²⁺ ). The rest of the primary blue light remains undigested. By mixing the blue and orange spectral components in a radiation flux ratio of about 1:17, a spectrum corresponding to the black body radiation color is obtained and is perceived by a person as low CCT white or flame light.

The proposed total UV conversion phosphor LED (200) has a semiconductor chip (11) emitting a near UV, violet or blue light with a wavelength of less than 450 nm. This light is consistent with the absorption spectra of the phosphorus and is fully convertible in a wavelength converter (15). As with partial conversion, the converter (15) contains phosphorus (17) for converting shortwave radiation to orange light in the 570-600 nm spectrum. In addition, the transducer (15) contains phosphorus (18), which converts shortwave radiation into blue light, in the 400-500 nm spectral band. Such phosphorus may be an oxide, halooxide, or nitride compound activated by divalent europium, divalent manganese, divalent tin, or trivalent cerium ions. For example, the blue component can be generated in inorganic phosphorus such as

CaMgSi ₂ O ₆ : Eu ²⁺ , Ba5SiO4Cl6: Eu ²⁺ , Mg ₃ Ca ₃ (PO ₄ ) ₄ : Eu ²⁺ , (Ca, Sr, Ba) ₅ (PO ₄ ) ₃ Cl: Eu ²⁺ ,

Ca ₂ B ₅ O ₉ (Br, CI): Eu ²⁺ , BaMgAlioOi7: Eu ²⁺ , Mn ²⁺ , BaMg2AI ₁₆ O ₂₇ : Eu ²⁺ , (Lu, Gd) ₂ SiO ₅ : Ce ³⁺ , Sr2P2O7: Sn ²⁺ , SrSiAI2O ₃ N ₂ : Ce ³⁺ or La ₃ Si ₆ Nn: Ce ³⁺ . By mixing the blue and orange spectral components in a radiation flux ratio of about 1:15, a spectrum corresponding to the color of the black body radiation is obtained, which is perceived by the person as low SST white or flame light.

The phosphor conversion lamp (100, 200) has a conventional construction semiconductor chip (1,11) consisting of a p-type layer coupled to the anode terminals and an n-type layer coupled to the cathode terminals (3, 13), which overlays the active layer. In the active layer, electrons injected from a n-type envelope recombine with holes injected from a p-type envelope.

The semiconductor chip (1, 11) of the exposed phosphor conversion LEDs (100, 200) has an active layer that emits blue or near UV light. In the active layer, it is preferable to use the third group of nitride compounds having the general formula Al _y ln _x Ga _{x x y} N. These materials have a high chemical and photochemical inertness, which determines the longevity of the LEDs. The structure of these semiconductor energy bands (remote side valleys) and the recombination characteristics of the charge carriers result in a weak temperature dependence of the output flow. The thickness of the active layer and the molar portions of the indium and / or aluminum, x and y, respectively, are selected such that the peak of the emission band is at the desired wavelength.

The most suitable active layer material for a phosphor of a partial conversion phosphor, in which a semiconductor chip (1) emits in the 400-500 nm wavelength range, is a triple ln _x Ga _x N alloy.

The active layer of a revealing full phosphor conversion LED (200), in which a semiconductor chip (11) emits at a wavelength of less than 450 nm, can be made of a triple ln _x Gai- _x N alloy (wavelength range 370-450 nm), binary GaN. compound (wavelength about 360 nm), or triple Al _y Ga- _y N alloy (wavelengths shorter than 360 nm). It is also possible to use a quadruple alloy of Al _y ln _x Ga _x - _y N over the entire wavelength range.

Typically, the chip (1, 11) of the luminaires (100, 200) is mounted in the reflector cup (2, 12) and the wires (4, 14) are connected to the metal terminals (3, 13) through which the chip (1, 11) is powered by a current. The wavelength transducer (5,15), which is a resin or silicone layer, a crystalline or ceramic plate, or a plastic mold containing phosphor particles, is arranged adjacent to said semiconductor chip (1, 11) so that some or all of the photon flux generated in the semiconductor is on the chip, the phosphor particles would be absorbed. The transducer (5, 15) may also be located outside the luminaire housing, for example, the transducer functions may be performed by a transparent luminaire cover covered with phosphor particles.

The wavelength transducer (5, 15) is configured such that the wavelengths and beam fluxes of the components of the emitter spectrum are most suitable for photobiologically friendly field illumination with low non-visual circadian effects. The optimal spectrum composition may vary according to specific applications (lighting of streets, parking lots, pedestrian and bicycle paths, building facades, monuments, parks, parking lots, and courtyards) and luminance requirements.

The moderately optimum composition of the two-color, black-body radiation corresponding to the low non-circular circadian effect is that the spectral power distribution consists of about 94-95% of orange light and about 5-6% of blue light at SST = 2000 K and about 75 -80% orange light and about 20-25% blue light at SST = 3000 K. It is therefore proposed that the ratio of the beam fluxes of these components to the wide-application conversion phosphor for LEDs with blue and orange spectral components, t . y. for phosphor partial conversion would be no more than 1:17 respectively, and for phosphor full conversion would be no more than 1:15 respectively at SST = 2000 K and not more than 1: 5 for phosphor partial conversion respectively. , and for phosphor complete conversion would be no more than 1: 4 for SST = 3000 K, respectively.

In two spectral component luminaires for photobiologically friendly field illumination, the radiation fluxes of each spectral component can be determined in several ways. In the proposed luminaires, this is done by selecting the size and concentration of phosphor particles, the wavelength transducer thickness, the refractive index of the wavelength transducer material, the distance between the wavelength transducer and the electroluminescent structure, and the position of the wavelength transducer inside or outside the luminaire housing.

Optimum photobiologically friendly street lighting can be achieved when the color of the lights matches the color of the black body radiation. The spectral components are chosen considering the mesopic functions of spectral luminous efficiency and spectral circadian efficiency. With a small non-circular circular effect, the optimum spectral components peak at about 450 nm and 585 nm. Due to the widespread use of these spectral performance functions, the specified optimal wavelength values may vary within ± 15 nm.

Specific examples

As an example, a partial blue light conversion lamp (100) is provided for photobiologically friendly outdoor illumination. The illuminator contains a semiconductor chip (1) which generates blue light by injection electroluminescence. The chip is inserted into the reflector cup (2) and connected to the terminals (3) using the connected wires (4). The chip is covered by a wavelength converter (5). The chip and transducer are encapsulated in a transparent housing (6) such as a plastic or silicone die. Typically, a semiconductor chip is composed of a p-type layer connected to the anode terminals and an n-type layer connected to the cathode terminals which envelop the active layer. In the active layer, electrons injected from a n-type shell layer radially recombine with holes injected from a p-type shell layer. A typical active layer material is a triple ln _x Gai- _x N alloy, whereby the thickness of the active layer and the molar amount of the indium in the alloy x are selected such that the emission band has a peak at 430-470 nm.

The light generated in the semiconductor chip (1) passes through a wavelength converter (5) containing phosphor particles (7). In one case, the photons emitted from the semiconductor chip (8) are not absorbed by the phosphor particles and escape from the chip into the environment through a transparent housing. Alternatively, photons (9) emitted from a semiconductor chip are absorbed by phosphor particles (7) and converted to photons (10) having a wavelength corresponding to a spectral component with a peak in the 570-600 nm (orange) spectrum. Such a light emits a two-component blue-orange (low SST white or flame) light.

An example of a complete near-UV conversion of phosphor in a phosphor (200) is provided as an example for photobiologically friendly outdoor lighting. Said luminaire (200) comprises a semiconductor chip (11) which generates dipped UV light by injection electroluminescence. The chip (11) is inserted into the reflector cup (12) and is connected to the terminals (13) by means of connected wires (14). The chip is covered by a wavelength converter (15). Said chip (14) and said transducer (15) are encapsulated in a transparent housing (16). Typically, a semiconductor chip is composed of a p-type layer connected to the anode terminals and an n-type layer connected to the cathode terminals which envelop the active layer. In the active layer, electrons injected from a n-type shell layer radially recombine with holes injected from a p-type shell layer. A typical active layer material is either a GaN semiconductor compound or a triple ln _x Ga- _x N or AlyGai- _y N alloy, or a quadruple ln _x Al _y Ga-i- _x- yN alloy, with the active layer thickness and the molar portion of the deposit x or the proportion of aluminum in the alloy y is selected such that the emission band has a peak at wavelengths shorter than 450 nm.

The light generated in the semiconductor chip (11) passes through a wavelength transducer (15) containing first type phosphor particles (17) and additionally second type phosphor particles (18). All photons emitted from a semiconductor chip are absorbed by phosphor particles. In this case, a portion of the photons (19) is absorbed by the first type of phosphor particles (17) and converted to photons (20) having a wavelength corresponding to a spectral component with a peak in the 570-600 nm (orange) spectrum. Also, the remainder of the photons (21) are absorbed by the second type of phosphor particles (18) and converted to photons (22) having a wavelength in the 430-470 nm (blue) spectrum. Such a two-color light emits blue-orange (low SST white or flame-colored) light.

As an illustrative example of the invention (Fig. 4), the available electroluminescence spectra of semiconductor chips, which are proposed for use in conversion phosphor lamps for photobiologically friendly field illumination, are provided. For both partial and total conversion, the electroluminescence spectra of the LEDs must be consistent with the absorption spectra of the phosphorus. In addition, at partial conversion, the electroluminescence spectrum of the luminaire must be matched to orange phosphorus so that the total spectral power distribution corresponds to the absolute black color of the body.

Accordingly, Figure 4 (a) shows an electroluminescence spectrum corresponding to a semiconductor chip having an active layer made of a triple ln _x Ga _x N alloy, where the thickness of the active layer and the molar fraction of the indium in the alloy are selected such that 445 nm in the blue spectrum. Such a chip can be used in a partial conversion luminaire for photobiologically friendly outdoor lighting. Accordingly, Figure 4 (b) shows the electroluminescence spectrum corresponding to a semiconductor chip having an active layer made of a triple ln _x Ga _x N alloy, where the thickness of the active layer and the molar fraction of the indium in the alloy are selected such that 380 nm in the near-UV spectrum. Such a chip can be used in a full conversion LED for photobiologically friendly outdoor lighting.

As an example illustrating the invention (Fig. 5), individual photoluminescence spectra corresponding to phosphores are proposed for use in conversion phosphor lamps for photobiologically friendly outdoor lighting. Accordingly, 5 (a) are given in Figure photoluminescence spectra corresponding to yttrium silicon magnesium aluminum garnet activated by trivalent cerium (Y3Mg2AISi2O12.Ce · ^34), barium strontium silicon nitride activated by divalent europium ions ((Ba, Sr) 2Si5N8: Eu ²⁺ ), barium strontium orthosilicate activated by divalent europium ions ((Ba, Sr) SiO4: Eu ²⁺ ), calcium alpha silicon aluminum oxynitride activated by divalent europium ions (Ca-a-SiAION: Eu ²⁺ ) or calcium strontium selenide, activated bivalent europium ions ((Ca, Sr) Se: Eu ²⁺ ) phosphorus, which absorbs blue or dipped UV light and emits orange light with a spectral band peak at 570-600 nm. Such phosphores can be used in partial or full conversion luminaires for photobiologically friendly outdoor lighting to generate an orange component of the spectrum. Accordingly, Figure 5 (b) shows the photoluminescence spectrum corresponding to the aluminum phosphorus activated by divalent europium ions (BaMgAlioOi7: Eu ²⁺ ), which absorbs near-UV light and emits blue light with a spectral band at 446 nm. Such phosphor can be used in full conversion luminaires for photobiologically friendly outdoor lighting to generate a blue spectral component.

An illustrative example of the invention (Fig. 6) is provided by the SGS of partial and full conversion luminaires for photobiologically friendly outdoor lighting. The spectra have a blue component with a peak in the 430-470 nm range, generated by an InGaN semiconductor chip due to injection electroluminescence or generated by a wavelength converter due to photoluminescence, and an orange component generated by a wavelength converter by photoluminescence. The radiation fluxes corresponding to the residual blue light and the light generated by each phosphor are determined by selecting the concentration of the phosphor particles, the wavelength transducer thickness, the refractive index of the wavelength transducer material, and the position of the wavelength transducer inside or outside the housing. Accordingly, 6 (a) are given in Figure SGS corresponding to a two-component flame color having light which is generated by the partial blue light with a spectral component peak at 445-450 nm, a conversion of the light emitting orange _Y3 Mg2AISi 0i2 _2: Ce ³⁺ , (Ba, Sr) 2Si5N8: Eu ²⁺ , (Ba, Sr) 2SiC> 4: Eu ²⁺ , Ca-a-SiAION: Eu ²⁺ and (Ca, Sr) Se: Eu ^{2+ in} phosphores that are spectral component peak due to photoluminescence at 570-600 nm. Accordingly, Figure 6 (b) shows the SGS corresponding to the two-component flame color light generated by the complete conversion of the near-UV light on BaMgAI10O17: Eu ²⁺ and Y3Mg ₂ AISi ₂ 0i ₂ : Ce ³⁺ phosphores which emit blue light respectively with a spectral component peak at 446 nm and an orange light with a spectral component peak at 600 nm.

Such flame light fixtures can be used for evening illumination of streets, pedestrian and bicycle paths, yards, buildings, monuments, parks, parking lots, and courtyards, so as not to disturb the human circadian rhythm.

Table 1 shows the photometric, color and photobiological parameters of the sample luminaires.

Table 1

The light source. SST, K CPF, blm / lm 0.3 cd / m ² CPF, blm / lm 2 cd / m ² CPF norm to CIE A 2 cd / m ² NW, lm / W 0.3 cd / m ² sv, lm / W 2 cd / m ² SARmes 0.3 cd / m ² SARmes 2 cd / m ² SARfot η lnGaN / (Ba, Sr) 2Si ₅ N ₈ 1704 0.075 0.068 0.185 298 329 84 69 39 0.73

InGaN / Y3Mg2AlSi20i2 2088 0.146 0.139 0.379 250 263 90 81 62 0.71 InGaN / (Ca, Sr) Se 2101 0.124 0.114 0.311 404 439 78 57 16th 0.77 InGaN / Ca-a-SiAION 2426 0.193 0.186 0.507 356 369 88 76 53 0.76 InGaN / (Ba, Sr) ₂ SiO4 2542 0.214 0.208 0.567 343 353 88 77 55 0.75 Warm white LED light 3652 0.301 0.311 0.847 377 365 90 80 62 0.77 Cold white LED light 5000 0.472 0.515 1,403 394 361 91 82 65 0.82 HPS lamp 1886 0.126 0.117 0.319 319 344 77 55 12th - CIE A standard lightening 2856 0.345 0.367 1 170 160 100 100 100 -

The parameters in Table 1 are compared with those for commercial warm and cold white LEDs and CIE standard luminaire A: SST - associated color temperature, CPF - circadian effect factor, SV - luminous efficiency, SAR

- the general color rendering index, SAR _me s the mesopic color rendering index and η

- the limiting efficiency determined by the difference in wavelengths of the light emitted by the semiconductor chip and the phosphor (Stokes offset).

Table 1 compares the parameters of the LEDs with those of the widely used HPS (h / gh pressure sodium) lamp. The values are given with an ambient luminance of 0.3 and 2 cd / m ² (respectively for the lower class ME6 and high class ME1 street lighting standards). The third column of CPF gives the values normalized to CIE standard luminous A (2856 K black body radiation), assuming an ambient luminance of 2 cd / m ² .

Table 1 shows that the light source parameters are strongly dependent on the phosphorus chosen, but the general trend is that with higher SST values, the circadian effect factor of the source also increases. The SGS of the offered luminaires goes down to the luminous efficacy values of commercial luminaires and HPS lamps, but most have a lower circadian efficiency factor: at 2cd / m ² , the luminaires offered have a CPF of approximately 0.1-0.25 blm / lm lower than commercial warm white luminaires. CPF, and even 0.3-0.45 blm / lm lower than the CPF of commercially available cold white LEDs. Compared to CIE standard luminaire A, the proposed luminaires have a CPF rationed to CIE standard luminaire A CPF of no more than 0.6. Meanwhile, for warm white light, this normalized CPF is about 0.85, and for cold white light, which corresponds to the main prototype of this patent, about 1.4.

The luminaires offered have a color-rendering capability comparable to that of commercial luminaires and are significantly better than HPS lamps. The marginal efficiency values for commercial warm white and offered luminaires are very similar, but due to the lower Stokes displacement, the commercial cold white luminaire has higher marginal performance.

the shortwave and longwave components of the light spectrum produced by the phosphor phosphor lamps offered have the following partial beam flux ratios respectively:

-About 1:21 when using Y3Mg ₂ AISi20i2: Ce ³⁺ phosphor, the wavelength of the InGaN chip emitted is 440 nm and the resulting SGS is SST = 2088 K, with CIE A standard luminance-normalized CPF = 0.379 at 2 cd / m ^{2 for} ambient luminance;

- at about 1:37 for (Ba, Sr) ₂ Si5N ₈ : Eu ²⁺ phosphor, the InGaN chip emitted a wavelength peak at 443 nm and the resulting SGS SST = 1704 K, with a CIE A standard luminance standardized CPF = 0.185, at an ambient luminance of 2 cd / m ² ;

at about 1:10 for (Ba, Sr) 2SiO ₄ : Eu ²⁺ phosphor, the wavelength of the InGaN chip is 440 nm, and the resulting SGS is SST = 2542 K, and the CIE A standard luminance is CPF = 0.567, at an ambient luminance of 2 cd / m ² ;

at about 1:14 using (Ca, Sr) Se: Eu ²⁺ phosphorus, the InGaN chip emits a peel spectrum at 443 nm and the resulting SGS SST = 2101 K, and CPF = 0.311 at CIE A standard luminance 2 cd / m ^{2 for} ambient luminance;

at about 1:11 for Ca-a-SiAION: Eu ²⁺ phosphor, the InGaN chip emits a 443 nm peak wavelength and the resulting SGS SST = 2426 K, and the CIE A standard luminaire has a CPF of 0.507 at 2 cd / m ^{2 for} ambient luminance.

The shortwave and longwave components of the proposed luminescence spectrum of the proposed total conversion phosphor lamps have the following partial beam flux ratios, respectively:

- about 1:19 when using Y ₃ Mg ₂ AISi20i2: Ce ³⁺ phosphorus, the resulting SGS SST = 2100 K, and the CIE A standard luminous flux normalized to CPF = 0.398 at 2 cd / m ² ambient luminance;

- at about 1:33 using (Ba, Sr) ₂ Si5N ₈ : Eu ²⁺ phosphorus, the resulting SGS SST = 1708 K and the CIE A standard luminosity is CPF = 0.196 at an ambient luminance of 2 cd / m ² ;

- at about 1: 9 for (Ba, Sr) ₂ SiO4: Eu ²⁺ phosphorus, the resulting SGS SST = 2576 K and the CIE A standard brightness CPF = 0.613 at 2 cd / m ² ambient luminance;

- at about 1:12 for (Ca, Sr) Se: Eu ²⁺ phosphorus, the resulting SGS SST = 2114 K and the CIE A standard brightness CPF = 0.338 at 2 cd / m ² ambient luminance;

at about 1:10 for Ca-a-SiAION: Eu ²⁺ phosphorus, the resulting SGS SST = 2449 K, and the CIE A standard luminous flux normalized to CPF = 0.545 at 2 cd / m ² .

Claims (8)

DEFINITION OF INVENTION 1. A luminaire having a spectral power distribution consisting of at least two spectral components, each having an individual spectral power distribution and a relative partial radiation flux, wherein the spectral power distributions and relative partial fluxes of each component of the luminaire are selected by taking their respective phosphorus SGS such that the ratio of the total radiation produced to the non-visual circadian efficacy resulting in the inhibition of melatonin release in the human pineal gland and to the luminous efficacy is not more than 0.6 of the standard luminous A at an ambient luminance of 0.01 to 10 cd / m ² . 2. A luminaire according to claim 1, characterized in that the associated color temperature of the light it generates is between 1500 K and 3000 K. 3. An illuminator according to claims 1 and 2, emitting light by means of a partial or full conversion wavelength transducer in the semiconductor chip at a wavelength converter of less than 500 nm inside or outside the housing and containing at least one type of phosphor. that said transducer generates radiation having a spectral peak in the orange region between about 570 nm and 600 nm, due to photoluminescence in a single type of phosphorus selected from the group consisting of: Y ₃ Mg ₂ AISi ₂ 0i ₂ : Ce ³⁺ , (Ba, Sr) ₂ Si ₅ N ₈ : Eu ²⁺ , (Ba, Sr) ₂ SiO ₄ : Eu ²⁺ , (Ca, Sr) Se: Eu ^{2 +} , Ca-a-SiAION: Eu ²⁺ . 4. The LED of claim 3, wherein the blue light in the transducer is partially converted to an orange light in a 400-500 nm spectral band of a semiconductor chip having an active layer made of an In ^ Ga ^^ N semiconductor alloy. 5. A LED according to claim 1, 3 and 4, characterized in that the semiconductor chip having an active layer made of a GaN semiconductor compound or an ln _x Ga _x N, Al _y Ga R _y N or Allyn _x Ga R _{x X y} N alloy. , is generated by passing UV or violet or blue light with a wavelength of less than 450 nm and is fully converted in a converter containing an additional 400 to 500 nm of blue light phosphorus selected from the group consisting of: CaMgSi ₂ O6: Eu ²⁺ , Ba5SiO4Cl6: Eu ²⁺ , Mg3Ca ₃ (PO4) 4: Eu ²⁺ , (Ca, Sr, Ba) 5 (PO4) 3Cl: Eu ²⁺ , Ca ₂ B ₅ O ₉ (Br, CI): Eu ^{2 +} , BaMgAli0Oi7: Eu ²⁺ , Mn ²⁺ , BaMg2Ali ₆ O ₂₇ : Eu ²⁺ , (Lu, Gd) 2SiO5: Ce ³⁺ , Sr2P ₂ O ₇ : Sn ²⁺ , SrSiAI2O3N2: Ce ³⁺ or La3Si ₆ Nn : Ce ³⁺ . 6. A luminaire according to claims 1, 3 and 4, characterized in that the shortwave and longwave components of the light spectrum it generates have the following partial beam flux ratios respectively: at about 1:21 when using Y ₃ Mg ₂ AISi ₂ 0i ₂ : Ce ³⁺ phosphor, the InGaN chip emits a wavelength peak at 440 nm and the resulting SGS is SST = 2088 K, with CIE A standard luminance normalized CPF = 0.379 , at an ambient luminance of 2 cd / m ² ; at about 1:37 for (Ba, Sr) ₂ Si ₅ N8: Eu ²⁺ phosphor, the InGaN chip has a wavelength of 443 nm and the resulting SGS is SST = 1704 K and CPF = 0.185 at 2 cd / m ² ambient luminance; - at about 1:10 for (Ba, Sr) ₂ SiO4: Eu ²⁺ phosphor, the wavelength of the InGaN chip is 440 nm, and the resulting SGS is SST = 2542 K, and CPF = 0.567 is normalized to CIE A standard light, at an ambient luminance of 2 cd / m ² ; -About 1:14 using (Ca, Sr) Se: Eu ²⁺ phosphorus, the InGaN chip emitted a wavelength peak at 443 nm and the resulting SGS SST 2101 K, oj CIE A standard luminance normalized to CPF = 0.311 at 2 cd / m ² ambient luminance; at about 1:11 for Ca-a-SiAION: Eu ²⁺ phosphor, the InGaN chip emits a 443 nm peak wavelength and the resulting SGS SST = 2426 K, and the CIE A standard luminaire has a CPF of 0.507 at 2 cd / m ^{2 for} ambient luminance. 7. The LED of claims 1 and 5, wherein the shortwave light spectrum component having a peak at 446nm is generated by BaMg ₂ Ali ₆ O ₂ 7: Eu ²⁺ phosphorus, and the shortwave and longwave components have the following partial moieties respectively. radiation flux ratios: - at about 1:19 when using Y ₃ Mg ₂ Al ₂ O ₂ : Ce ³⁺ phosphorus, the resulting SGS SST = 2100 K, and the CIE A standard luminous flux normalized to CPF = 0.398 at 2 cd / m ² ambient luminance; at about 1:33 for (Ba, Sr) ₂ Si ₅ N ₈ : Eu ²⁺ phosphorus, the resulting SGS SST = 1708 K and the CIE A standard beam CPF = 0.196 at 2 cd / m ² ambient luminance ; - at about 1: 9 for (Ba, Sr) ₂ SiO4: Eu ²⁺ phosphorus, the resulting SGS SST = 2576 K and the CIE A standard brightness CPF = 0.613 at 2 cd / m ² ambient luminance; - at about 1:12 for (Ca, Sr) Se: Eu ²⁺ phosphorus, the resulting SGS SST = 2114 K and the CIE A standard brightness CPF = 0.338 at 2 cd / m ² ambient luminance; at about 1:10 for Ca-a-SiAION: Eu ²⁺ phosphorus, the resulting SGS was SST = 2449 K and CPF = 0.545 was standardized at CIE A standard brightness at 2 cd / m ² ambient luminance. 8. A luminaire according to any one of the preceding claims, characterized in that the radiation fluxes of each component of the spectrum are determined by selecting the particle size and concentration of phosphorus (7; 17; 18), the thickness of the wavelength transducer (5; 15), , the distance between the wavelength transducer and the electroluminescent structure (1; 11), and the position of the wavelength transducer in the luminaire body or outside the luminaire body.