阅读说明：本技术 照明装置 (Lighting device ) 是由 S.洛伦兹 于 2019-09-11 设计创作，主要内容包括：给出了一种照明装置,其具有-用于发出蓝光(11)的照明设备(1),以及-用于运行照明设备(1)的控制设备(4),其中,-控制设备(4)被配置为用于调节蓝光(11)的黑视素影响因子。(A lighting arrangement is given, having-a lighting device (1) for emitting blue light (11), and-a control device (4) for operating the lighting device (1), wherein-the control device (4) is configured for adjusting a melanopsin impact factor of the blue light (11).)

1. An illumination device having:

-a lighting device (1) for emitting blue light (11), and

-a control device (4) for operating the lighting device (1), wherein,

-the control device (4) is configured for adjusting the melanopsin influence factor of the blue light (11), and

the lighting device (1) is arranged for emitting blue light (11) from a first emission side and white light (12) from a second emission side facing away from the first emission side.

2. The lighting device according to the preceding claim,

wherein the control device (4) is configured for controlling the lighting device (1) such that in different operating states of the lighting device (1) emits blue light with different melanopsin impact factors at the same color locus of the blue light (11).

3. The lighting device according to any one of the preceding claims,

wherein the control device (4) is configured for controlling the lighting device (1) such that in different operating states of the lighting device (1) emits blue light with different color positions at the same melanopsin influence factor of the blue light (11).

4. The lighting device according to any one of the preceding claims,

wherein the lighting device (1) comprises at least one first light source (14) configured for emitting blue light.

5. The lighting device according to any one of the preceding claims,

wherein the lighting device (1) comprises a second light source (15) configured for emitting green-blue light.

6. The lighting device according to any one of the preceding claims,

wherein the lighting device (1) comprises at least one third light source (16) configured for emitting light substantially in the spectral range of green to red light.

7. The lighting device according to any one of the preceding claims,

wherein the at least one third light source (16) comprises a conversion element (16b) configured for substantially fully converting blue light into light of low energy.

8. The lighting device according to any one of the preceding claims,

wherein the blackness contribution of the light emitted by the lighting device as a whole can be adjusted by changing the blackness contribution factor of the blue light (11) without changing the color locus of the blue light (11) or the white hue of the white light (12) for this purpose.

9. The lighting device according to any one of the preceding claims,

wherein the lighting device (1) is arranged for emitting blue light (11) in the direction of a ceiling (5) of a room.

10. The lighting device according to any one of the preceding claims,

wherein the lighting device (1) is arranged for emitting white light (12) in a direction away from a ceiling (5) of a room.

Technical Field

An illumination device is presented.

Disclosure of Invention

The object of the invention is to provide a Lighting device which is particularly suitable for so-called "Human central Lighting" which is central to the design of artificial Lighting.

According to at least one embodiment of the lighting device, the lighting device comprises a lighting device. The lighting device is provided and configured for emitting light during operation. In particular, the lighting device is configured for emitting blue light. Here, blue light is light that a human observer perceives as blue light, for example, under daylight conditions. In particular, blue light may be light in the CIE Standard chromaticity System (CIE-Normvalennzsystem) within the color locus range of CX ≦ 0.32 and CY ≦ 0.33.

The blue light is in particular configured to reproduce the color of a blue sky. For this purpose, blue light can be in particular light in the color locus range of CX <0.27 and CY <0.27 in the CIE standard chromaticity system.

To emit blue light, the lighting device may comprise a plurality of light sources which may be operated independently of each other. The light source of the lighting device may for example be or comprise a light emitting diode. The light-emitting diodes may each be or comprise one or more light-emitting diode chips, for example.

According to at least one embodiment of the lighting arrangement, the lighting arrangement comprises a control device for operating the lighting device. A control device is a device that can be used to adjust different operating states of a lighting device. For example, the control device can be used to select an operating state from a predefined set of operating states. To this end, the control device may comprise at least one microcontroller and/or at least one integrated circuit. The control device may be arranged separately from the lighting device. Here, one control device may be configured as a plurality of lighting devices for controlling the lighting apparatus. Furthermore, the control device may be integrated into the lighting device, for example into a housing of the lighting device. The control device may also be configured for providing the lighting device with an operating current required for operation of the lighting device.

According to at least one embodiment of the lighting arrangement, the control device is configured for adjusting a melanotropin influencing factor (melanoscope virkungusfaktor) of the blue light emitted by the lighting device. Melanopsin influencing factor a_mel,vIs a measure of the effect of a light source on circadian rhythm and is taken as the utilization of the biological influence spectrum (biologisches Wirkunsspektrum) S_melThe quotient of the estimated spectral distribution of the emitted light and the spectral distribution of the emitted light estimated using the human spectral sensitivity curve (menschlich Spektralpfickkichkeitskurve) V (lambda). Melanopsin influencing factors are defined, for example, in the following criteria: DIN SPEC 5031-. Now, for example, canThe light source of the lighting device is controlled with a control device such that when blue light is emitted, the light has a desired adjustable melanopsin impact factor.

According to at least one embodiment of the lighting arrangement, the lighting arrangement comprises a lighting device for emitting blue light and a control device for operating the lighting device. Here, the control device is configured for adjusting the melanopsin influence factor of the blue light.

The illumination device described here is based in particular on the following considerations. In "Human central Lighting", attempts are made to produce light that acts biologically, visually and emotionally. Here, these different aspects often require different light types in the same application. In particular, a light which is not necessarily optimal visually or emotionally is required as a stimulus to a photoreceptor in the eye which is biologically influenced and has an influence on the circadian rhythm of a human. Here, the photoreceptor in the eye includes a Protein Melanopsin (Protein Melanopsin) as a color receptor substance (Rezeptorfarbstoff). Through this protein, melatonin release can be influenced. Melatonin is a hormone in the circadian cycle of a person, i.e. the cycle of regulation of a person involving a daily rhythm, which influences the waking and sleeping time. Changes in the stimulus to the photoreceptor (i.e., ipRGC stimulus, wherein ipRGC is in english: intrinsic photosensitive specific Ganglion Cells) also generally cause changes in light, i.e., for example, light color (Lichtfarbe).

High activation of the photosensitive body in the eye is achieved, for example, with light having a large spectral fraction in the blue or cyan range, which is visually perceived as cold white. Low activation is accompanied by a reduced blue contribution, which is achieved by using warm white light illumination. That is, in this case, activation of the photoreceptor in the eye, that is, change in stimulus, is accompanied by change in color and color temperature.

With the illumination device described here, it is now possible to generate blue light with different melanopsin impact factors.

According to at least one embodiment of the lighting arrangement, the control device is configured for controlling the lighting device such that in different operating states of the lighting device, the lighting device emits blue light with different melanopsin impact factors at the same color locus of the blue light. That is, without changing the color impression of the generated blue light, there is a possibility of generating light with different melanopsin impact factors. Here, a blue light of "the same" color locus means that a human observer does not or hardly perceive a change in color locus. For example, the color locus varies maximally within a range of 3 MacAdam-Ellipsen ellipses.

In this way, for example, a lighting device is realized which generates the illusion of a blue sky or close to a blue sky and at the same time enables different levels of activation, i.e. different blackout effect factors, to be set without visibly changing the illusion of a blue sky or close to a blue sky. Here, the ipRGC activation potential, i.e., the melanopsin influence factor, of the emitted blue light can be changed by changing the spectrum of the emitted light without changing the color locus of the emitted light.

The blue light emitted by the lighting device is not used for illumination, but rather provides an emotional level via the blue light, which cannot be reflected in conventional white-light-emitting lighting devices.

The illumination device is configured for generating at least two spectra of blue light, which are metameric (parameter), that is to say for which no visually perceptible color differences are generated. However, these at least two different spectra are optimized for an increased melanopsin effectiveness on the one hand or a reduced melanopsin effectiveness on the other hand. Surprisingly, it has further been shown that the biological effectiveness can be altered much more strongly with blue light than with white light.

According to at least one embodiment of the lighting device, the control device is configured for controlling the lighting device such that in different operating states of the lighting device, the lighting device emits blue light with different color positions at the same blackness element impact factor of the blue light. In this way, for example, the blue hue of the emitted light can be adapted to a preferred color locus for a user of the lighting device without changing the blackout effect of the emitted light. Thus, the emitted light can be matched to the individually preferred color.

According to at least one embodiment of the lighting device, the lighting device comprises a first light source configured for emitting blue light. The first light source may for example comprise a light emitting diode emitting unconverted blue light. In other words, blue light is generated without conversion by a conversion element containing a luminescent substance, in particular directly by operation of one or more light-emitting diode chips. The light generated thereby has a particularly small spectral width. The first light source for example emits blue light with a peak wavelength between at least 445nm and a maximum of 480 nm.

According to at least one embodiment of the lighting arrangement, the lighting device comprises a second light source configured for emitting green and blue light. The second light source here comprises, for example, a light-emitting diode without a conversion element. That is to say that the green-blue light is generated without conversion by a conversion element comprising a luminescent substance, in particular directly by operation of one or more light-emitting diode chips. The light generated thereby has a particularly small spectral width. Here, the peak wavelength of the green blue light is larger than the peak wavelength of the blue light of the first light source, and is, for example, in a range between at least 485nm and at most 495 nm.

According to at least one embodiment, the lighting device comprises at least one third light source configured for emitting light substantially in the spectral range of green to red light. Here, "substantially" means that the maximum intensity of electromagnetic radiation with a wavelength of less than 500nm in the spectrum of the light of the third light source is at most one third of the maximum intensity in the spectrum of the third light source. The light of the third light source can be used to saturate the blue light generated by the illumination device during operationAn influence is produced. For example, the saturation may be reduced by switching on a third light source such that the light color changes from dark blue to grayIn the blue range.

The light of the third light source is characterized by a particularly large spectral width. For example, the half-value width may be at least 170 nm. In particular, the half-value width of the spectrum of the light of the third light source is larger than the half-value width of the spectrum of the light of the first light source and larger than the half-value width of the spectrum of the light of the second light source.

To this end, the third light source may comprise a conversion element configured for substantially fully converting blue light into light of low energy. That is to say that the third light source comprises, for example, one or more light-emitting diode chips which, in operation, emit blue light. The blue light is converted into light of another color by a conversion element arranged behind. The conversion element can comprise different types of luminescent substances, so that blue light is converted, for example, into green, yellow and/or red light. The conversion element is here, for example, selected to be so thick that no or almost no blue light leaves the third light source, but is completely converted into light of low energy.

The lighting device may comprise a plurality of third light sources, which may for example differ from each other with respect to the luminescent substance used in the conversion element.

In particular, the light emitting device may comprise two different first light sources, one second light source and two different third light sources. The two third light sources may differ from one another in particular with regard to their share of red light in the emission spectrum. The two first light sources differ, for example, in the peak wavelength of the blue light produced. Thus, one first light source may generate blue light at a peak wavelength which is at least 10nm, in particular at least 20nm, smaller than the peak wavelength of the blue light of the other first light source. The light sources of the lighting device may operate independently of each other.

According to at least one embodiment of the lighting device, the lighting device is arranged for emitting blue light from a first emission side and for emitting white light from a second emission side facing away from the first emission side. In this way, with the illumination device, light can be emitted which is to be used to achieve a specific blackant effect on the one hand. On the other hand, white light can be emitted, in particular in a different direction than blue light.

According to at least one embodiment of the lighting arrangement, the lighting arrangement is arranged for emitting blue light in the direction of the ceiling of the room. That is, blue light is not set for direct illumination, but for indirect illumination. With blue light, the illusion of a blue sky can be created, for example, on the ceiling of a room. Here, the blue light is adjustable with respect to its melanopsin effect. The blue scattered light is reflected, for example, at the ceiling, reaches the user of the lighting device, and exerts its blackout effect there.

According to at least one embodiment of the lighting arrangement, the lighting device is arranged for emitting white light in a direction away from a ceiling of the room. In this embodiment of the lighting device, on the side facing away from the ceiling, the lighting device can emit light into the room for illumination there. The blackness-factor of the light emitted by the lighting device as a whole can be adjusted by changing the blackness-factor of the blue light without the need to change the color of the blue light or the white hue of the white light for this purpose.

Drawings

In the following, the lighting device described herein is explained in detail with reference to embodiments in the drawings.

In fig. 1, 2A, 2B, 2C, 3A, 3B, 3C, 3D, 4A, 4B, 4C, 5A, 5B, 5C, the illumination device described here is illustrated by means of schematic diagrams and graphical depictions.

In the drawings, identical, similar or identically acting elements are provided with the same reference numerals. The drawings and the size ratios of the elements shown in the drawings relative to each other should not be construed as being to scale. Rather, various elements may be shown exaggerated for better illustration and/or for better understanding.

Detailed Description

Fig. 1 shows a first embodiment of the lighting device described herein. The lighting device comprises a lighting device 1. The lighting device 1 comprises a plurality of light sources 14, 15, 16 (see for example fig. 2A, 2B and 3B in this connection). The lighting device 1 emits, for example, blue light 11 towards the ceiling 5 of the room when in operation.

Furthermore, the lighting device may emit white light 12 at its side facing away from the ceiling 5, towards the room, for example towards the object 2 and the person 3. The blue light 11 emitted by the lighting device 1 during operation can be reflected or scattered at the ceiling 5 and in this way be emitted towards the room, for example towards the person 3.

Furthermore, the lighting device comprises a control device 4 for operating the lighting device 1. The control device 4 may, for example, operate the light sources 14, 15, 16 of the lighting device independently of one another. The control device is here configured for adjusting the melanopsin influence factor of the blue light 11.

This may be illustrated, for example, in connection with the graphical representations of fig. 2-5.

As schematically shown in fig. 2A, the lighting device may comprise a first light source 14, the first light source 14 being for example a light emitting diode with at least one light emitting diode chip. The first light source 14 produces blue light, shown by means of a spectrum, which has a peak wavelength λ p of less than 450nm, in particular of about 446nm, during operation. Here, in fig. 2 to 5, the light emission power I of each wavelength is plotted in arbitrary units with respect to the wavelength λ.

The lighting device further comprises a third light source 16, see fig. 2B, the third light source 16 for example comprising a semiconductor body 16a and a conversion element 16B. In the semiconductor body 16a, blue light can be generated during operation, which blue light is substantially completely converted by the conversion element 16b into light with a wavelength of ≧ 500 nm.

The combination of the light of the first light source 14 and the third light source 16 results in the spectrum shown in fig. 2C, which has the color locus CIE_XY(0.218/0.262) and melanopsin influence factor a_mel,v＝1.10。

In such a lighting device, as described in connection with fig. 3A to 3D, the second light source 15 can now be switched in, see fig. 3B, the peak wavelength λ p of the second light source 15 being at about 500nm, in particular 490 nm. The first light source 14 of fig. 3A produces blue light, shown by way of a spectrum, which has a peak wavelength λ p of approximately 475nm when in operation.

Furthermore, the lighting device comprises a further third light source 16, see fig. 3C. In contrast to the third light source 16 of fig. 2B, this further third light source is selected which has an increased share in the spectral range of red light. In this way, light can be generated at the same color location as in the spectrum of fig. 2C, where the melanopsin impact factor is 2, 11, and thus almost twice as large as the melanopsin impact factor for the spectrum of fig. 2C. This is achieved using the spectrum of fig. 3D. The spectra are generated by superposition of the spectra of fig. 3A, 3B, 3C.

For the light of the spectrum of fig. 4C, the light of the first light source 14 in fig. 3A and the second light source 15 in fig. 3B are combined to form the spectrum of fig. 4A. This spectrum is combined with the spectrum of the other third light source 16 of fig. 3C to form the spectrum of fig. 4C. Blue light 11 is generated, which has a color locus CIE at a melanopsin impact factor of 1.26_XY(0.313/0.329), a correlated color temperature of about 6500 Kelvin (Kelvin), and a color rendering index CRI of 57.

For the light of the spectrum of fig. 5C, the spectrum of fig. 2C, which is generated by the light of the first light source 14 of fig. 2A and the third light source 16 of fig. 2B, is combined with the spectrum of the other third light source of fig. 3C. Blue light 11 is produced with the same color location and with the same color temperature as for the spectrum of fig. 4C. The color rendering index CRI is 81 and the melanopsin influence factor is 0.736.

Even if not all combinations are explicitly described, the features and embodiments described in connection with the figures can be combined with each other according to other embodiments. Furthermore, the embodiments described in connection with the figures may alternatively or additionally have other features according to the description in the general section.

This patent application claims priority from german patent application 102018122283.1, the disclosure of which is incorporated herein by reference.

The invention is not limited to the embodiments by the description of the embodiments. Rather, the invention encompasses any novel feature and any combination of features, which in particular encompasses any combination of features in the claims, even if this feature or this combination itself is not explicitly specified in the claims or exemplary embodiments.

List of reference numerals

1 Lighting device

11 blue light

12 white light

14 first light source

16 second light source

16 second light source

16a semiconductor body

16b conversion element

2 object

3 persons

4 control device

Ceiling of 5 rooms