DE102010030501A1 - Apparatus and method for adjusting a circadian rhythm - Google Patents

Abstract

The room lighting system (2-6) is used to adjust a circadian rhythm 'and has a first light source for fully illuminating a lighting area with circadian effective light. The illumination surface occupies at least 0.25 sr of a field of view of a user who assumes a predetermined useful position. The room lighting system has a second light source for illuminating a work surface with circadian ineffective light. The method is for operating such a room lighting system (2-6), wherein for determining a lighting sequence, a phase difference between an internal clock and externally given time sequences is determined, which can be done in the simplest case by calculating a time difference between a starting location and a destination ,

Description

The The invention relates to a device and a method for adaptation a circadian rhythm '.

The Human life is subject to different rhythms, especially to adjustments due to variations in environmental parameters. These include z. B. seasonal fluctuations in the day length and also the daily light / dark change of the natural Lighting. Man follows the change in daylight with one Sleep / wake rhythm with approximately the same period length. The most important control system for this process is the inner one Clock, which can also be found in animals and plants. The rhythm the internal clock is genetically predetermined in its basic features, so innate. The genetic specification of the internal clock is not exactly 24 hours, but only approximately (lat. "circa"). One speaks therefore of the circadian rhythm (lat. This = day), and the inner clock has to be renewed day by day be synchronized. Light controls the circadian rhythm and is the most important timer for the organism. Is missing natural light as a timer for the inner Clock, or does artificial light to one not to the individual rhythm of the internal clock at the appropriate time the inner clock, their run can get mixed up relatively quickly. Sleep difficulties, chronic fatigue in the worst Fall to winter depression can be the result.

speed Traveling over time zones, such as intercontinental flights, lead to a desynchronization (phase mismatch the internal clock against the environment) of the internal clock of the People with the environmental time. The traveler perceived as negative Episodes are referred to as "jetlag". Jet lag is characterized by disturbances in sleep / wake behavior, due to tiredness, disturbances of food intake, cognitive impairment and a number of other, non-specific Mood disorders. These disorders can without technical assistance or medical support (hormone intake) only be broken down slowly. The inner clock is similar without further Measures of about 1 hour per day to the changed Time conditions. Particularly big are the conversion difficulties in Eastbound flights over multiple time zones and arrival in the morning - which is often the case. The internal clock set to the time zone of the departure point then stands on a much earlier phase than the external one Time. The light, which is then exposed at the destination, disguises the Phase of the internal clock still further back, causing an adjustment delayed. The effect is "wrong" by light Time ". Avoiding morning light the inner clock is illuminated by light in the afternoon of the destination (corresponding to the morning of the internal clock), which reduces jet lag. On the other hand, the conversion of the internal clock is easier if they opposite the environment, d. H. the body Adjusts more easily to the new time zone when the time is on Destination compared to the internal clock still hangs (Flight westward). Light in the evening at the destination represents the Phase of the internal clock back, thereby faster the destination is adjusted.

traveler are usually reliant to wait until themselves the internal clock with the help of daylight at the destination to the new Adjusted the environmental time. Part of the passengers take medication (eg the hormone melatonin). Buy and Taking along is not possible in all countries or allowed. There are also medical doubts on the meaningfulness of artificial melatonin input. To desired To achieve effects in terms of an adjustment of the internal clock, must be taken at certain specified times, which further complicates a simple and meaningful use. isolated Electric lights are set, but the correct Effect of an additional knowledge of the phase of the inner Watch need and therefore without careful planning and consideration of the living conditions of the traveler not easy to use properly.

But even without actually traveling across time zones, may be a desynchronization of the inner clock with the outer temporal processes occur. This is always the case Case, when the external processes are timed change quickly, as it is z. B. for shift workers a change of the layer sequence occurs. This results in similar ones Disorders such as those described above for jet lag. Shift workers often live and work asynchronously her inner clock. The phenomenon is in the literature referred to as "social jetlag".

Light acts through the recently discovered "third photoreceptor" in the eye of the control centers for the internal clock in the brain. The effect of daylight-like light with high blue levels in the spectral range around 460 nm is much stronger than that of light with high red levels, such. B. incandescent light. Such effective early-morning light shifts the circadian phase forward, backward in the late evening hours. Here, the terms "morning" and "evening" the personal circadian time (internal time) of the user of a lighting system to understand and not the external time as z. B. is displayed on a clock. Clearly, a shift in the circadian phase forward means that a person feels as though he has been awake for longer. The person will then be in the evening tired earlier and / or awake early the next morning. A shift backwards or backwards means that a person stays awake in the evening longer than the day before or the next morning awake later. At personal lunchtime, a shift in the circadian phase is not possible. Circadian effective light at this time stabilizes the circadian phase in its current state.

If a shift in the circadian rhythm can be achieved or not and if so, in which direction the circadian phase is therefore dependent on the current one Location of the individual circadian phase at the time of exposure to light.

The publication of Gall, D., Bieske, K. (2004): "Definition and measurement of circadian radiometric quantities", CIE Symposium '04: Light and Health: non-visual effects, University of the Performing Arts, Vienna, CIE , describes a circadian factor a _cv . By means of the effect factor a _cv different light sources are comparable with each other with regard to their circadian effect. In this case, a visual light component in a lamp spectrum evaluated according to a light sensitivity curve v (λ) is set in relation to a circadian light component, that is, evaluated according to a circadian effect function c (λ).

Conversely, therefore, the circadian effect factor allows to determine the circadian effective proportion of light from the visually assessed proportion. In the case of light sources with a very high proportion of blue (eg blue LEDs with a circadian effect factor a _cv > 1), it may be the case that the thus determined circadian effective light component has a higher value than the visually assessed one.

The evaluation method according to Gall et al. is also in the German prestandard DIN V 5031-100 used. The circadian effect factor a _cv corresponds to the effect factor for nocturnal melatonin _suppression , which is designated therein by a _{ms, v} . The action function denoted above and below as c (λ) is designated there as s _ms (λ). It is assumed that the spectrum of activity for the shift of the circadian phase agrees with that for the nocturnal melatonin suppression.

to Assessment of a circadian effect may be in addition to the above as well as others mentioned alternative effect function c (λ) Impact functions for circadian effects used become.

However, the magnitude of the circadian effect is determined not only by the spectral composition of the light emitted by the lighting system, the resulting effect factor a _cv and the intensity of this light, but is also strongly influenced by the size of the illumination surface in its image retina of the eye. A high level of illumination on the eye alone does not ensure a high circadian effect, but the illumination that hits the eye must come from as large an area as possible. Only then will this large area be imaged on a large area of the retina via the optical imaging properties of the eye. This ensures that a larger number of the circadian effective light-sensitive photo-receptors in the eye is achieved. The necessary large area in space may preferably be a bright room surface, which is illuminated by a light source, which emits circadian effective light.

It The object of the present invention is to reduce the jet lag problem by suitable use of light and consequently a faster one Adapt to a time shift to allow.

These Task is by means of a room lighting system and a method solved according to the respective independent claim. Preferred embodiments are in particular the dependent one Claims removable.

Various embodiments of the room lighting system for adjusting a circadian rhythm have a first light source and a second light source. The first light source is set up to completely illuminate a lighting surface with circadian effective light. The illumination area occupies at least 0.25 sr of a field of view of a user who assumes a predetermined useful position, whereby one or more further predetermined user positions are also possible. In one embodiment, at a distance of 1 m between the illumination surface and the user's eye, the size of the illumination surface is greater than 0.25 m ² , e.g. B. 50 × 60 cm. The second light source is designed to illuminate a work surface with circadian ineffective light.

The Room lighting system serves to adapt a circadian rhythm and is set up, optionally circadian effective light and circadian non-effective light emission.

As circadian effective light is referred to below light, which can effectively adjust the phase of the internal clock (high circadian effectiveness). As circadian non-effective light, the light is called, which affects the phase of the internal clock only slightly (negligible circadian effectiveness). Under a cir cadian not (or not significantly) effective light is understood in particular light or a light effect, in which even after about 1 h exposure time no significant effect with respect to a shift in the circadian phase occurs. Circadian particularly strong effective light can be realized in particular by three measures, which are preferably used simultaneously: first, a high blue content in the spectrum of the light source used; secondly, a high illuminance, measured at the user's eye, and third, a planar arrangement of the light source from which the light falls on the user's eyes. High levels of illuminance on the user's eye generally, ie when the user is sitting upright or high vertical illuminance levels. When lying down, with the eyes directed upwards, high illuminance levels on the eye are achieved by high horizontal illuminance levels. The following descriptions are based on an upright posture of the user, but without limiting the invention thereto. Therefore, vertical illuminances are considered to be relevant to the circadian effect, and the term "vertical illuminance" can be used to be equivalent to the illuminance measured on the user's eye. Circadian effective light in the sense described above can only be used when the eyes are open, ie when the user is awake. Therefore, the application of circadian effective light will generally not be performed while lying down.

The large-area light source is preferably a secondary light source, for. B. a wall which is illuminated from a primary light source. But it can also be a self-area light source such. B. an OLED or a backlit surface act. Thus, a lighting in which the light from a large bright area such. B. a wall, a stronger circadian effect than light from a spotlight, such. In US 2008/0219013 described, which illuminates only a small area. This is because the photoreceptors in the eye, which are responsible for the biological effect, are distributed over the entire retina over a large area. These photoreceptors are best stimulated when as many photoreceptors as possible are illuminated simultaneously. The above-mentioned large luminous surfaces must be arranged in the field of view of the user, since they can only be imaged onto the retina. A light source outside the field of vision is contrary to US 2008/0219013 not effective.

Also a lighting behind the knees, as in the patent US 6,164,787 is circadian, contrary to the claims of the said patent.

A or more such large-area illumination sources can be particularly easy through a room lighting system to be provided. A user needs only in the here with to stop the room lighting system equipped room and does not need to wear apparatus (glasses, etc.) for the treatment still consciously looking into apparatuses (eg a light source). He rather can use the room as usual. A person can So work in the room or read a newspaper, etc. and still be treated. A room lighting system can be individual Treatment units, in particular in the form of workplace lighting units, have, so that in a room several people individually be treated with light, in particular with circadian effective light can.

The Room elements, which for the realization of the room lighting system are integrated into the lighting situation, so z. As ceilings or walls, should be designed in color so that the spectral characteristics the light used is maintained. This is how circadian effective Light are emitted over surfaces, which do not reduce the blue content. These are especially white, light gray, light blue or generally light surfaces. Dark Colors or strong yellows or reds in the Colors of the room surfaces, as well as the use of materials, which blue spectral ranges due to reduced reflection or transmission or decrease by increased absorption should be avoided become.

additionally or instead of changing the light emitted by light sources Light can be an active change of the reflection, Transmission or absorption properties of room elements z. B. by blinds, curtains, movable room elements or electronically controllable optical elements are used to switch between circadian effective and circadian non-effective lighting switch.

A similar, the blue components reduce the effect like yellow or red materials Can the human eye lenses in older Cause people, as they turn slightly yellow in the course of life and thus absorb blue light.

elder People therefore need more light than younger people both for the fulfillment of visual tasks as well as for a sufficiently high circadian effect. The age of the user can therefore be used in the determination of optimal circadian effective lighting be included.

The wearing of normal glasses or visual aids does not limit the use of circadian effective light, as long as they have sufficient transparency in the relevant spectral range between 420 nm and 500 nm, as is usually the case. For sunglasses, tinted or heavily mirrored glasses or colored contact lenses this is not true. The user should then be advised not to wear the vision aid during treatment.

If To reduce the jet lag circadian stimulating light avoided should be, especially in a positive circadian phase shift, may advantageously have a circadian rhythm not affecting Room lighting can be activated. This allows a user to use the room use a switched on lighting, z. B. to work, without due to the incidence of light adaptation to the new time zone is delayed. In contrast, in the previous methods administered only a circadian stimulating lighting and a user no convenient way to avoid a circadian Provided. Thus, the same space, for. B. the Cabin or hotel room, or an individual workplace located in it, for both circadian stimulating lighting and set for a circadian non-stimulating lighting become.

There a workplace due to its comparatively small size already sufficiently illuminable with low light intensities is, can be a special circadian only slightly effective Realize workplace lighting, which nevertheless sufficient high brightness for good visual performance. Circadian non-effective light excels in this regard thus in particular by the fact that there are no high blue levels contains no large glowing areas in the room and overall lower illuminance has, which includes only an illumination of the work area.

In various embodiments of the room lighting system are the lighting surface and the work surface different room surfaces of one of the room lighting system illuminated room.

In various embodiments are the first light source and the second light source independently controllable.

In various embodiments, the illumination surface a reflective surface that has a reflection coefficient of more than 0.7.

In According to various embodiments, the second light source emits a focused light, preferably with a small beam angle of less than 30 °, leaving only a very narrow usable area directly is illuminated.

The Room lighting system can be advantageously circadian effective Light with a blue light component in a wavelength range radiate between 420 nm and 500 nm, especially with a high Proportion at about 460 nm, while the circadian is not effective Light no or a negligible proportion having such a blue light. This may be the case, for example that happen for a circadian stimulating lighting at least a "blue" light source with a high spectral Proportion in a wavelength range between 420 nm and 500 nm is turned on and for a circadian non-stimulating Illuminate the at least one "blue" light source is off. Generally, the room lighting system can advantageously Light sources with different spectral energy distributions have, in particular at least one "blue" light source with a high proportion in a spectral range between 420 nm and 500 nm and at least one "non-blue" light source, those with a high proportion in the spectral range between 570 nm and 700 nm shines, but not or only slightly in the spectral range between 420 nm and 500 nm. The blue light source can also be a pure blue Light source with an exclusive or far predominant Be proportion in the spectral range between 440 nm and 480 nm. As well The "non-blue" light source can also be a purely "non-blue" light source without one or with only negligible ones Be proportion in the spectral range between 440 nm and 480 nm. The light sources are advantageously dimmable.

For A high circadian effect can affect the eye of a user appropriate illuminance (usually the vertical illuminance) a circadian effective light (eg a light with a high Blue fraction) may advantageously be at least 100 lx. At a lower blue levels may cause a circadian effect Illuminance of more than 200 lx, preferably more than 400 lx, especially more than 500 lx, be advantageous.

For a high circadian effect, the circadian effective light can be beneficial a value for the circadian effect factor of 0.5 or more have, in particular, a value for the circadian Effect factor of more than 0.9.

For A minor or negligible circadian effect may be the circadian effective light advantageously has a value for the circadian Have an effect factor of 0.4 or less.

The circadian effect is determined both by the illuminance striking the eye (usually vertical) and the proportion of circadian light in the spectrum (a _cv ). The product of circadian effect factor and illuminance can be considered circadian effective lighting strength. This product of the illuminance striking the eye and the dimensionless circadian effect factor may preferably be at least 200 lx, especially at least 250 lx, especially preferably more than 400 lx, for circadian active light.

For circadian only slightly effective light (still generalizing referred to as circadian ineffective light) may be the product of on the eye striking illuminance (lx) and the Value for the circadian effect factor advantageously smaller to be 100 lx, especially less than 60 lx, especially smaller than 50 lx, even more preferably less than 40 lx and especially preferably less than 30 lx.

So is a one-hour lighting circadian ineffective, which from a standard lamp with a color temperature of 3000K a lamp-specific circadian effect factor of 0.4 below given a vertical illuminance of 160 lx becomes. The circadian effective illuminance is calculated thereby 0.4 × 160 lx = 40 lx.

in the Case of a workplace lighting with a recommended workplace illuminance of z. B. 500 lx can still such circadian ineffective lighting be realized with low illuminances on the eye, by largely reducing an indirect portion of the light, i. H. the room areas are not included in the lighting and the workplace light from a directional, direct-radiating Light source such. As a halogen spotlight or a mirror grid the workplace is addressed.

Also, a one-hour illumination may be inactive circadian, which is emitted by a yellow LED (a _cv = 0.05) with a vertical illuminance of 500 lx; this gives a value of the circadian effective illuminance of 25 lx.

On the other hand, an efficacy is assumed for a lamp with a color temperature of 8000 K with a lamp-specific circadian effect factor a _cv of 1.0 under a vertical illuminance of 200 lx (value of the circadian effective illuminance: 200 lx). Such a lamp can be configured, for example, as a fluorescent lamp of the type SKYWHITE from Osram with a daylight-like color impression.

Efficacy is also assumed for a blue LED with a lamp-specific circadian effect factor a _cv of 10.0 under a vertical illuminance of 30 lx (value of the circadian effective illuminance: 300 lx).

It may be generally beneficial when the circadian ineffective light is designed to work on a desktop Illuminance of at least 300 lx, in particular of at least 500 lx.

Around a person using the room lighting optically possible to provide naturally perceived light can advantageously the circadian non-effective light knows, especially warm white, be, even when switched off (mostly) blue Light source. The other light sources can then be correspondingly be colored in such a way that a user the absence of the circadian effective (predominantly) blue light or not only a little noticeable. Preferably, at least three different-colored light sources are used, whose combined spectra to a white impression on the user to lead.

The Light source (s) may be of any kind and For example, fluorescent lamps, compact fluorescent lamps, luminescent, plasma discharge lamps and light bulbs. At least a light emitting diode (LED) as a light source (s), as a lighting with LEDs are easy with respect to a desired spectrum is adjustable. For particularly high efficiency in the reduction of a jet lag can in particular be organic light-emitting diodes (OLEDs) Be used advantageously, as with these simply a large area Radiating surface can be provided.

The Room lighting system should be as possible for lighting many of the circadian effect mediating photoreceptors either a planar jet area (lamp (s), luminaire (s)) that produces vertical luminances, and / or the light on large surfaces reflecting surfaces (eg wall, ceiling, reflectors), which then surfaces available with high luminances for the user's eye do. Advantageously, the room lighting system adds at least one ceiling lighting and / or at least one wall lighting on.

The effective area, d. H. the lighting surface, This is advantageously so great that they at a normal use of the room has a solid angle of at least 0.25 sr in the field of view of the user. This is z. B. then given if the bright illuminated area from which the circadian effective Light falls on the user's eye, a surface of at least 0.5 m by 0.5 m at a distance of 1 m.

The room lighting system may further relate to an input unit for querying data Lich have a circadian state, z. B. a terminal. For example, a circadian phase of the user via a query of the starting point (alternatively time zone, next larger city, city in the same time zone, departure or airport, if in the same time zone, etc.) and the current time at the starting point are determined in good approximation. Furthermore, the destination (alternatively: time zone, next larger city, city in the same time zone, arrival or airport, if in the same time zone, etc.) can be determined, as well as the current time at the destination. This location can be an interim destination or an end destination.

The room lighting system may also include a determining unit for automatically determining a lighting sequence based on the queried circadian state. This eliminates any effort for a user to look up in tables or calculate a current usage time or type of use of the room lighting system. For example, the time difference between the queried starting location and the queried destination gives an indication of the time by which the user's circadian phase should be shifted. It can be z. B. additionally be taken into account that a maximum adjustability of the circadian phase by a light exposure per day is about 3 hours, or how long a user is already in the time zone of the destination. The lighting parameters of the lighting sequence can advantageously be determined automatically from a reference table, which z. B. is stored in a lookup table, or calculated. Corresponding data are z. From: Reilly, T., G. Atkinson, et al. (2007). "Coping with jet-lag: A Position Statement for the European College of Sports Science.", European Journal of Sport Science, Vol. 7 (1), pages 1 to 7 , removable.

at short stays in places with big time difference to Place of origin may be due to the inertia of the circadian Systems may not achieve a change become. It may therefore also be useful to have an adjustment of the inner. Clock to avoid the overall burden of the user as possible to keep low. In such cases should circadian effective Light be shunned or used in a timely manner that the status of the circadian system is maintained or the later destination is approached.

The Room lighting system can also have a control unit (light management system) for setting, monitoring and / or activating and deactivating of the illumination sequence. The room lighting system controls the individual lighting units (lamps, lights, etc.), for example with respect to their brightness and / or spectral composition.

The Room lighting system may have an output unit for outputting User hints for reducing a jet lag or customizing a jet lag circadian rhythm 'exhibit. The output unit can advantageously a screen, a printer, a unit for sending e-mail messages, comprise a unit for sending SMS messages, etc. So can make recommendations about behaviors (eg. B. a bedtime or a time after or before the bright light be avoided or visited), if necessary under Consideration of dates of the user. This will the user is able to have positive effects after exposure to light to reinforce and reduce negative effects or to avoid.

The Room lighting system can be used in aircraft, in ships, in hotel rooms, be installed in conference rooms, etc. advantageously can the room lighting system with mobile or stationary Cabins are used, for example, travelers at an airport Tobe offered.

The Room lighting system can also be used to control the inside clock the user already before entering a jet lag in the desired To shift direction. This can be beneficial to the adaptation time minimize at the destination and there as soon as possible jet lag symptoms to mitigate or largely preclude in advance and thus discomfort and loss of performance to avoid at the destination. In such a case, the user should advantageously the usual light exposure (daylight, Room light) outside of the room / cabin and observe if necessary (at unfavorable times) avoid, eg. B. by use suitable sunglasses with filters to reduce blue levels. Corresponding rules of conduct may be given to the user an output unit of the system are transmitted.

The Room lighting system can also be used to help shift workers whose internal clock insufficient with the processes of shift work is synchronized, a better adaptation of the internal clock to this To achieve processes. Even without actually over Traveling through time zones happens with shiftworkers to states that are comparable to a jet lag, since the internal clock frequently to new activity times must stop ("social jet lag"). To this Purpose, the room lighting system near a shift work area be positioned.

A Combination of the two influences shift work and travel over Time zones occurs z. B. on pilots or flight attendants. Therefore offers a use of the room lighting system for these groups of people especially.

The Application of the room lighting system can also be done with other methods be combined to influence the circadian rhythm, z. B. with an additional oral dose of melatonin.

The Method is used to operate such a room lighting system. In this case, for determining a lighting sequence advantageously a time difference between a starting place and a destination be calculated. Even more effective may be an adaptation of the circadian phase when in addition to determining a lighting sequence the chronotype, an appointment, an arrival time at the destination, already performed light treatments and / or a length of stay be taken into account at the destination. The chronotype can z. B. by querying the usual waking and falling asleep to be recorded for the last days.

Generally For example, a phase difference may be used to determine a lighting sequence between an internal clock and externally given temporal Processes are determined, which in the simplest case by the calculation of the time difference between the starting point and the destination can be done.

In The following figures illustrate the invention with reference to an embodiment described in more detail schematically. It can for better clarity identical or equivalent elements with the same reference numerals be provided.

1 shows a possible flow chart for adjusting a circadian rhythm ';

2 shows a possible device for adjusting a circadian rhythm '.

1 shows a possible flowchart with several steps S1 to S5 for adjusting a circadian rhythm '.

In a first step, a user may enter a room equipped with a room lighting system for adapting a circadian rhythm, e.g. B. as below in 2 described. This room may be, for example, a car set up at an airport, a hotel room, etc.

Before or - here: - after entering the room in step S1, a data query is performed in a step S2. This can be done for example by means of an input unit (terminal) of a computer or a dedicated lighting control unit. The data query includes the query of a time at the place of departure (exit time). For example, to capture the exit time, the user may enter an exit time zone (UTC +/- x), his or her starting point, a nearest major city or airport near the departure point (eg, in the same time zone), and so on. Optionally, the user can specify when he left home, what type of chrono he is (whether he gets up early or late, or goes to bed); whether fixed dates are to be considered or whether the user can freely allocate his time, whether the current location is an interim destination, which may then be the final destination, how long he is already in the target time zone, if he has already received a light treatment, and so on. The target time can also be queried or determined from the knowledge of the local time at the location of the room. The destination does not need to match the current location of the lighting device; Thus, the location of the lighting device can only be an intermediate destination such as a transfer airport. In a following step S3, a lighting sequence is automatically determined on the basis of the query. The illumination parameters of the illumination sequence can be determined from the queried information by comparison with a reference table. The illumination sequence can be a light exposure to circadian effective light (preferably bright, high blue light activating light having a circadian efficiency greater than 0.5, preferably greater than 0.9, with large area high luminance, high brightness monitors, etc.) and / or or circadian non-effective light (preferably more attenuated light without blue components or with only low blue levels, illumination only where light is needed, no bright areas, low luminance, low illuminance, monitors as dark as possible, with a circadian effect factor a _cv of less as 0.3, preferably less than 0.2). Thus, for example, from the information about the starting point and from the knowledge of the local time LT at the location of the room, first a time shift ZV can be determined according to ZV = PT-LT. This is followed by a calculation as to whether there is a positive or a negative time shift. There is a negative time shift if the time at the destination LT is later than the personal time PT, e.g. Eg on a flight from Bos ton to Frankfurt: -6 hours. Analogously, there is a positive time shift, if the time at the destination LT is earlier than the personal time: z. Eg on a flight from Hong Kong to Frankfurt, +7 hours. In the event of a negative time shift of the user in the evening of the destination, in general circadian effective light and generally circadian non-effective light should be emitted, while with positive time shift of the user light circadian effective light in the morning and circadian non effective light in the evening is emitted. In individual cases, other recommendations may also arise depending on the chronotype and individual time difference.

In Analogous to the query of the starting point and the destination for the determination a time difference can z. For example, a shift worker the working hours and rest periods of the previous day and the working hours the following days are queried and from this a time difference be calculated.

at an adaptation of the internal clock in advance, so before a jet lag or before switching to another shift working time the same target values are used analogously.

In a step S4 is the user z. B. via a screen, Email, SMS, a printout, etc. information about advantageous Behaviors are given. For example, he can talk about a start, a duration and an end of a light treatment informed as well as an expected jet lag reduction through the light treatment or the current session or over a residual jet lag after treatment. Also, the user can over recommended behaviors such as a bedtime be informed possibly taking into account personal appointments. Generally, the user can have a beneficial behavior be informed, z. B. during and / or after a light treatment. Specifically, he can be called periods in which he even after the light treatment, continue to seek bright light or Should avoid light.

In In a step S5, the lighting sequence is activated and a Light treatment of the user performed.

2 shows a room 1 with a room lighting system 2 - 6 with an input terminal 2 in the form of a computer to which an output unit 3 , here a printer is connected as an example. The input terminal 2 is used to query data about the circadian status of a user of the room 1 , The printer 3 is used to provide information about the light treatment, including clues about behaviors to adjust the circadian phase. The input terminal 2 may simultaneously comprise or be a computing unit for automatically determining a lighting sequence based on the queried circadian status. B. by the computer is equipped with an appropriate software or plug-in card. The input terminal 2 is with a central control unit 4 connected to set the lighting sequence, wherein the control unit 4 large wall radiators 5 and a ceiling washer 6 for large-scale illumination of a ceiling of the room 1 controls. Alternatively, other large-area lighting devices, for example, translucent materials illuminated by light sources or illuminated and reflective elements of the lamps used can be used. In particular, the control unit 4 the lighting devices 5 . 6 selectively activate to both radiate circadian effective light or circadian non-effective light, as well as adjust their brightness. The lighting devices 5 . 6 can be equipped with selectively activatable light sources of different spectrum, in particular with at least one "blue" LED with a high proportion in the spectral range between 440 nm and 480 nm, with at least one "non-blue" LED with a high proportion in the spectral range between 570 nm and 700 nm and a small proportion in the spectral range between 440 nm and 480 nm and further with at least one further "non-blue" LED with a small proportion in the spectral range between 440 nm and 480 nm, the "non-blue" LEDs together at least make whitish light.

To reduce brightness, the lighting devices 4 . 5 dimmable executed. Generally, the control unit 3 to less lighting devices 4 . 5 activate as circadian effective light and / or dimming it down. By means of the room lighting system, among other things, a method according to 1 be performed. A user can use the room 1 use normally during a light treatment, e.g. For working or reading.

Of course the present invention is not limited to the embodiment shown limited.

So For example, steps S1 and S2, S3 and S4 or S4 and S5 also be executed in reverse order. Further can also be dispensed with step S4.

1

room

2

input terminal

3

output unit

4

control unit

5

Wandstrahler

6

uplight

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• US 2008/0219013 [0018, 0018]
• US 6164787 [0019]

Cited non-patent literature

• - Gall, D., Bieske, K. (2004): "Definition and measurement of circadian radiometric quantities", CIE Symposium '04: Light and Health: non-visual effects, University of Performing Arts, Vienna, CIE [0008]
• - DIN V 5031-100 [0010]
• Reilly, T., G. Atkinson, et al. (2007). "Coping with jet-lag: A Position Statement for the European College of Sports Science.", European Journal of Sport Science, Vol. 7 (1), pp. 1-7 [0049]

Claims (15)

Room lighting system ( 2 - 6 ) for adjusting a circadian rhythm with - a first light source for fully illuminating an illumination surface with circadian effective light, the illumination surface occupying at least 0.25 sr of a field of view of a user occupying a predetermined useful position and - a second light source for illuminating a working surface with circadian ineffective light. Room lighting system ( 2 - 6 ) according to claim 1, wherein the illumination surface and the work surface are mutually different space surfaces of a space illuminated by the room lighting system. Room lighting system ( 2 - 6 ) according to one of claims 1 or 2, wherein the first light source and the second light source are independently controllable. Room lighting system ( 2 - 6 ) according to one of the preceding claims, wherein the illumination surface has a reflective surface with a reflection coefficient of more than 0.7. Room lighting system ( 2 - 6 ) according to one of the preceding claims, wherein the second light source emits a focused light. Room lighting system ( 2 - 6 ) according to any of the preceding claims, wherein the circadian effective light is a high blue light and the circadian non-effective light is a low blue light. Room lighting system ( 2 - 6 ) according to one of the preceding claims, in which a illuminance of the circadian light striking the eye of a user is at least 200 lx, in particular more than 400 lx. Room lighting system ( 2 - 6 ) according to one of the preceding claims, in which the circadian active light is a light with a circadian effect factor a _cv of 0.5 or more, in particular with a circadian effect factor a _cv of more than 0.9 and / or the circadian ineffective light Light with a circadian effect factor a _cv of 0.4 or less. Room lighting system ( 2 - 6 ) according to one of the preceding claims, wherein the product of vertical illuminance and circadian effect factor a _cv for the circadian effective light is at least 200 lx, in particular at least 400 lx. Room lighting system ( 2 - 6 ) according to any one of the preceding claims, wherein the product of vertical illuminance and circadian effect factor a _cv for the circadian ineffective light is at most 50 lx, in particular at most 30 lx. Room lighting system ( 2 - 6 ) according to one of the preceding claims, wherein the circadian ineffective light is designed so that it reaches an illuminance of at least 300 lx on the work surface. Room lighting system ( 2 - 6 ) according to one of the preceding claims, comprising at least one LED, in particular an OLED area radiator, as a first light source. Room lighting system ( 2 - 6 ) according to one of the preceding claims, comprising a ceiling lighting ( 6 ) and / or a wall lighting ( 5 ) comprising the first light source. Room lighting system ( 2 - 6 ) according to one of the preceding claims, comprising an input unit ( 2 ) for querying data relating to a circadian state, a calculation unit ( 2 ) for automatically determining a lighting sequence on the basis of the requested circadian state and a control unit ( 4 ) for adjusting the lighting sequence and / or an output unit ( 3 ) for issuing user instructions for adjusting a circadian rhythm. Method for operating a room lighting system according to any one of the preceding claims, wherein for determining a lighting sequence, a time difference between a starting location and a destination, especially in addition a chronotype, an appointment and / or a stay on the Destination is taken into account.