DE102020102404A1 - Lighting device - Google Patents

Abstract

Lighting device for illuminating a workplace on a work table, with a flat visible body, which is arranged upright on at least one side of the work table opposite the workplace and is designed as a reflector, as well as at least one light assembly for irradiating the visible body and for irradiating the work table, characterized in that the lamp assembly comprises separately controllable lamp modules for irradiating the visible body on the one hand and the work table on the other hand independently of one another.

Description

The present invention relates to a lighting device for illuminating a workplace on a work table, with a flat visible body, which is arranged upright on at least one side of the work table opposite the workplace and is designed as a reflector, as well as at least one light assembly for irradiating the visible body and irradiating the work table.

The lighting of a workplace is subject to a variety of requirements. Basically, of course, the first thing to do is to illuminate the work table with sufficient light intensities in such a way that sufficient brightness is guaranteed on the work table and objects on the work table are clearly visible without dazzling the person at the work place. At least the area of the work table of interest should be illuminated as evenly as possible or in accordance with the visual requirements regarding, for example, the illuminance, the uniformity, the color rendering or the freedom from reflections, in order not to tire the user due to different brightnesses of the surface to be viewed. At the same time, however, it is important to ensure that no shadows impair visibility. Such shading can occur, for example, when the light comes slightly at an angle from behind, so that a user bent over the table shadows part of the table with his head or upper body, but irradiation of the work table that is too flat or abrasive can also lead to thick books or other towering objects cast shadows on the table. On the other hand, if the work table is irradiated centrally from above, slightly from the side of the table opposite the work station, in order to avoid the shadowing problem mentioned as far as possible, on the other hand, reflective glare can occur if the table surface or objects on it reflect the relatively steeply incident light and at an angle from below throw it into the eyes of the user.

In addition to the mentioned aspects of uniform brightness, freedom from shadows and no glare, other factors such as the color rendering of the illumination and the lowest possible color temperature shifts due to the illumination are also decisive for good visual quality of the table lighting.

Apart from these requirements for the visual effectiveness of the lighting, the lighting device should also meet various non-visual effects. Such non-visual effects, which are sometimes also called biological light effects, influence the well-being of users, who usually spend longer times at work, and are important for health and performance, for example with regard to the circadian rhythm or sleep-wake- Rhythm, possible winter depression or other body functions such as serotonin production and melatonin release. Such non-visual lighting effects are now widely recognized and are also the subject of scientific publications and standards. For example, the melatonin suppression to be avoided at night is defined as a melanopic light effect by a corresponding effect factor, which is a measure of the influence of a light source on the circadian rhythm and depends, for example, on the color temperature or the spectrum and intensity of the light. In order to achieve a noticeable melanopic effect, high illuminance levels or lux numbers are necessary on the eye. So that there is no glare, the light should come from as large an area as possible.

In order to have such non-visual light effects on a work table, it has already been proposed to set up a shell-shaped light panel on the work table that is irradiated by a light source in order to generate sufficiently high vertical illuminance levels on the eye through reflection, cf. DE 20 2012 004 264 U1 . However, this known lighting device is primarily aimed at the non-visual light effects mentioned, so that standard-compliant, energy-efficient and fatigue-free work at the table is not guaranteed. On the one hand, the shell-shaped light panel affects the usable work surface on the table, since the light panel is to be set up on the table.

Even if it is already difficult enough to achieve the mentioned visual and non-visual lighting effects equally, the lighting task is made even more difficult by the fact that the mentioned requirements are not always required to the same extent or are not always the same. If, for example, the work table is used by a highly active user on a cloudy day or in the morning with little daylight in the work room, the non-visual lighting effects are less important, but more the sufficient illumination of the work table for good visibility of the objects on it on. Conversely, if the workplace is used by a rather sleepy person, the non-visual lighting effects may be more helpful. Regardless of the users and the daylight conditions, the workplace can also be used differently depending on different tasks. If, for example, a computer installed at the work desk is used, one is possibly Shadows cast on the table surface are less disruptive than impairment of the luminosity and contrast strength of the screen or the screen display, while conversely when examining an object on the table surface, a shadow cast by the computer screen can be very disruptive and it is less important that the screen appears high-contrast .

The present invention is therefore based on the object of creating an improved lighting device of the type mentioned, which avoids the disadvantages of the prior art and further develops the latter in an advantageous manner. In particular, the lighting device should equally meet the requirements for the visual lighting effect such as uniformity of the illumination, freedom from shadows, glare and color rendering as well as the requirements for the non-visual lighting effect under different conditions of use.

According to the invention, the stated object is achieved by a lighting device according to claim 1. Preferred embodiments of the invention are the subject of the dependent claims.

According to an advantageous aspect of the present application, it is proposed that the irradiation of the upright reflective body provided on the work table on the one hand and the irradiation of the work table on the other hand, and thus the visual and non-visual lighting effects, be managed separately and controlled individually in order to ensure good visibility under different conditions of use On the one hand, objects located on the work table and, on the other hand, a sufficiently high level of vertical illuminance on the eye without dazzling the user. According to the invention, the at least one lamp assembly comprises separately controllable lamp modules for irradiating the said viewing body on the one hand and the work table on the other hand independently of one another. As a result, the work table or objects located on it can be irradiated or illuminated differently than the panel-like viewing body, which reflects the light radiated on it and at least partially directs it onto the user's eyes. By decoupling the table irradiation from the visible body irradiation, the properties relevant for the visual light effects such as illuminance and luminance as well as the properties responsible for the non-visual effects such as melanopic lumens, EDI stimulus and blue light damage can be optimized in equal measure.

The said work table can classically be an office table, but it can also include other work surfaces such as a kitchen counter, a standing desk, a workbench or even mixed function tables such as a lounge table.

In a further development of the invention, the luminaire modules mentioned can have different main radiation directions in order to be able to primarily irradiate different spatial areas. In particular, the cited separately controllable luminaire modules can also have radiation spaces that do not overlap one another, so that there is no intermixing with regard to the light emitted in each case. In particular, the radiating space of the lamp module or modules for irradiating the reflective light panel or body can be contoured and aligned in such a way that the light essentially only falls on the named viewing body. On the other hand, the emission space of the lamp module or modules for irradiating the work table can be contoured and aligned in such a way that the light coming from this or these lamp modules essentially only falls on the work table.

In a further development of the invention, the at least one lamp module for irradiating the upright, reflective visual corpus can have a main radiation direction that is directed at the named visual corpus, while the at least one lamp module for irradiating the work table has a main radiation direction that is directed at the work table.

In an advantageous further development of the invention, the multiple lamp modules of the said lamp assembly can nonetheless be accommodated in a common housing and / or mounted on a common carrier and / or combined to form a unit that appears to be uniform. In particular, the lamp modules can form an elongated, for example linear or bar-shaped lamp assembly, which can be arranged above the work table.

In particular, such an elongated light assembly can be arranged above the work table parallel to the table surface and essentially parallel to the table edge on which a user is sitting or standing in order to irradiate the work table and the upright viewing panel arranged on the work table from above.

The lighting assembly can advantageously be spaced from the edge of the table on which a user is sitting or standing and offset from the side of the table opposite the user. In particular, the light assembly can be arranged above the table half facing away from the user. If a monitor is arranged on the work table, the screen surface of which is possibly aligned slightly inclined to the vertical, the said light assembly can be above said Monitor be arranged in a plane or immediately adjacent to it, which goes through the screen surface of the monitor.

In an advantageous further development of the invention, the light assembly can be mounted on the visible body, wherein a light carrier can be provided protruding from an upper edge region of the visible body over the work table in order to hold the light assembly above the work table. Said carrier can protrude from the visible body over the work table in the manner of a gallows.

The light assembly is advantageously spaced a little from the viewing body, in particular towards the side of the table on which the user is seated or standing as intended.

In a further development of the invention, said visible body can form a flat panel or an essentially flat, only slightly curved reflector surface which can be arranged upright on the table side opposite the user, said visible body being mounted on the work table or also attached to a stand can be standing on the ground.

Said visible body does not necessarily have to be designed in the form of a flat panel, but can optionally also be contoured in the shape of a shell or a double shell and / or include side wings that can extend on a right and / or left narrow or longitudinal side of the work table. Independent of such side wings, the visible body can optionally also have a roof-shaped arching or a roof-like section above the table.

The panel-like, reflective visible body can advantageously be arranged in the immediate vicinity or directly on the work table. Such close proximity to the workplace allows the lighting device to work very efficiently and cover a large solid angle for the eye, especially in comparison to the illumination of room walls and ceilings, which is sometimes used to achieve vertical luminance levels in the room by diffuse reflection.

In order to be able to illuminate the work table differently in different areas, the at least one light assembly can advantageously have several light modules for irradiating the work table, the said several light modules each irradiating only a section of the work table and being separately or individually controllable in order to illuminate different zones of the work table in different ways to be able to. The luminaire modules mentioned can have overlapping or separate, non-overlapping radiation spaces, so that overlapping sections of the work table or sections of the work table that do not overlap can be irradiated.

The named lamp modules for irradiating the work table can be separately dimmable and / or switched on and off separately in order to generate different brightness levels on different zones of the work table. As an alternative or in addition, the said lamp modules can also be varied separately from one another with regard to their light color, for example in order to illuminate a right half of the table more warm white and a left half of the table more cold white.

Such different lighting of the work table in different zones can not only be helpful in order to be able to carry out different tasks on different work table sections. For example, when reading a book on the left half of the table, it can be helpful to brightly illuminate the left half of the table with a spectrum similar to daylight, while less bright, warm light can be shone on the right half of the table when looking at photos on the right half of the table. Independently of this, in the middle of the table, if there is a computer screen there, for example the light radiated onto the table by a corresponding lamp module can be dimmed down in order to increase the brilliance of the screen display.

Irradiation of the work table, which differs in zones, can, independently of this, also be helpful in order to adapt the illumination of the work table to the daylight and / or room situation. For example, if one side of the work table is close to a window, a table section near the window can be illuminated more brightly than a table section lower in the room in order to adapt the artificial light scenario for illuminating the work table to the daylight scenario of the room.

The multiple lamp modules for irradiating the work table can be arranged in a row next to one another, in particular along the longitudinal extent of the aforementioned elongated lamp assembly.

Advantageously, the lamp modules for zone-wise irradiation of the work table can complement one another in such a way that together they irradiate the work table uniformly and at least essentially completely. In particular, the luminaire modules mentioned can have radiation areas that complement and / or overlap each other in such a way that that the table surface of the work table or a room above it can be essentially completely irradiated with uniform light intensities.

A plurality of lamp modules can also be provided for irradiating the visible body, which can have either overlapping or separate, non-overlapping emission spaces, the said emission spaces of these lamp modules each being directed at the visible body. The named lamp modules for irradiating the visible body can also be arranged in a row next to one another, in particular along the longitudinal extent of the aforementioned elongated lamp assembly.

In principle, however, it would also be possible to irradiate the visible body with only one lamp module, such a lamp module, for example, having a linear optical element, for example a linear reflector. As an alternative or in addition, it would also be possible to irradiate the visible body with light, for example, by means of a centrally arranged radiator, or to irradiate it with light by a plurality of radiators, for example from a left-hand side and a right-hand side.

The panel-like visible body mentioned, which extends upright on the work table, can in particular be irradiated according to the so-called wallwasher principle. The lamp module (s) for irradiating the panel-like visual body can be arranged in the region of an upper edge section of the visual body at a distance therefrom in the direction of the user in order to irradiate the visual body from above in a dragging manner. The luminaire module or modules can have a suitable optical element, for example in the form of a reflector and / or a lens, in order to design the light intensity distribution so that the viewing body has at least approximately uniform illuminance over its height.

The light modules for irradiating the work table and the light modules for irradiating the panel-like visible body can advantageously be arranged in the immediate vicinity of one another. In particular, the named lamp modules can form two rows of modules which are arranged parallel to one another, in particular directly adjacent to one another, and can be accommodated in an elongated lamp housing and / or attached to a common elongated lamp carrier.

In particular, the luminaire modules mentioned are designed and arranged in such a way that the light sources of the luminaire modules are not visible to a person using the workplace as intended. If a user sits or stands in the intended manner on a side of the work table that is opposite the named visual corpus, the light sources of both the light modules that illuminate the work table and the light sources of the light modules that illuminate the visual corpus are shielded from the field of vision of the named user.

Such a dimming of the light sources of the lamp modules can be achieved, for example, by a common, for example, bar-shaped lamp housing edge. Alternatively or additionally, however, the lamp modules can also have, for example, shell-shaped or double-shell-shaped reflectors that are designed and aligned in such a way that they cover the respective associated light sources from the intended field of view of the user.

The above-mentioned clamshell or clamshell-shaped reflectors can face the user with their back when the latter is sitting or standing on the intended side of the table. The concavely curved, light-technically active sides of the above-mentioned clamshell or clamshell-shaped reflectors can face the visible body.

Regardless of the curvature of the reflectors, the light sources of the lamp modules can be arranged on the side of the reflectors facing away from the user and / or facing the viewing body. In the case of shell-shaped reflectors, for example, the light source can radiate towards the user, but the light emitted by the light sources is captured by the shell-shaped reflectors and the light sources are preferably completely covered by the reflectors.

In order to be able to absorb large amounts of light via the pupils without glare, the said viewing body can be designed with a relatively large area in an advantageous development of the invention, the reflective surface of the said viewing body, which reflects light towards the workplace, for example at least 0.5 m ² or even can be more than 1 m ² or more than 2 m ² . For example, the panel-like visible body on the table side opposite the workstation can extend over more than 50% or more than 75% of the table width or the length of the mentioned opposite table side. In particular, the visible body can protrude essentially along the entire opposite side of the table, so that the width of the visible body can essentially correspond to the table width.

Regardless of the width of the visible body, said visible body can extend over a height from, for example, 0.5 m to 1.5 m, wherein said visible body can extend in said manner over the edge of the table, for example start directly at the edge of the table and 0.5 m to 1.5 m or 0.6 m to 1 .0 m above the edge of the table.

In general, the extent and arrangement of the viewing body can be adapted to the binocular field of view in order to cover a sufficiently large area of the binocular field of view. As is known, the binocular field of view comprises different areas, for example the central field of vision, the near-peripheral field of vision, which has an extension of approximately twice 30 °, and the middle-peripheral field of vision, which has an extension of approximately twice 60 °. In relation to the workplace or the head of a user who is intended to be at the workplace, the viewing body can advantageously cover at least the central field of view of about twice 30 °, for example a field of view of twice 30 ° to twice 90 ° or twice 30 ° to twice 60 ° in cover in the horizontal direction.

In the vertical direction, the viewing body can cover a field of vision upwards to approximately the horizontal, wherein the cover in the vertical direction can also end somewhat below the horizontal or also go beyond the horizontal. Usually, the direction of view of a user who is intended to be at the workplace is directed obliquely downwards onto the work surface, with the binocular field of view usually assuming that 50 ° above the focused point and 70 ° below the focused point can be detected in the vertical direction. If one then assumes that the main direction of view of the user will go obliquely downwards on the work table and / or on the monitor, it may be sufficient if the viewing body covers the field of vision up to the horizontal in the vertical direction.

The panel-like visible body advantageously leaves the entire surface of the work table free in order to be able to use the entire work table in a conventional manner. The panel-like visible body can be provided directly on a rear edge of the table.

In an advantageous further development of the invention, the surface of the panel-like visible body facing the workplace can be designed to be diffusely reflective, it being possible for example to provide a diffuse degree of reflection of more than 80% or even more than 90%. For example, the reflective visible surface of the visible body can be designed to be bright white with a certain surface roughness.

As an alternative or in addition, however, at least a part of the surface of the said visible body that faces the workplace can be designed to reflect in a preferred direction, the said preferred direction - taking into account the light modules that irradiate the visible body - to the opposite workplace and / or to the Can be directed to spatial area in which the face of the user is intended.

In an advantageous development of the invention, the viewing body can have a scale-like reflector structure and / or a Fresnel-like surface structure and / or a facet-like reflector structure that specifically reflects light coming from the lighting assembly to the opposite side of the work table onto a user located there. By means of such a specifically radiating reflector structure, relatively high luminance densities can be achieved very efficiently in the user's field of vision at the workplace, whereby the user can absorb high amounts of light via the pupils. This increases the efficiency of the viewing body considerably. At the same time, a further increased separation or decoupling of the visual effects of the lighting device from its non-visual effects is achieved.

For example, such a facet-like reflector structure of the visible body can have more than 50 or more than 100 or even more than 200 such reflector facets or scales.

In an advantageous development of the invention, however, the viewing body can also reflect part of the reflected light, preferably onto the work table, in order to reduce the formation of shadows on the work table and to increase the uniformity of the illumination. For example, the viewing body can also bring about a mixture of directional reflection and diffuse reflection. For example, a part of the surface of the viewing body can be designed to be facet-like or reflective in the manner mentioned, while another subsection of the viewing body or the reflective surface of the viewing body is designed to be diffusely reflective.

In an advantageous development of the invention, the lamp modules for irradiating the work table can also differ from the lamp modules for irradiating the visible body with regard to the emittable light color or temperature and / or with respect to the emittable spectra of the light emitted in each case. In particular, the light radiated onto the viewing body can be optimized with regard to its non-visual lighting effect, while the light radiated onto the work table can be designed as close to daylight as possible and / or color-fast.

The light radiated onto the viewing body can preferably be optimized with regard to its melanopic effectiveness. In particular, at least one lamp module for irradiating the viewing body can be configured in such a way that the light reflected from the viewing body has a high melanopic effect factor and / or avoids a blue light hazard, i.e. a photochemical hazard in the sense of the so-called blue light hazard. In an advantageous development of the invention, a high melanopic effect factor can be achieved while avoiding the risk of blue light by adding cyan light or the light of a cyan LED to the light thrown onto the viewing body and / or emitting cyan light. Such cyan light can have a relatively high intensity in the wavelength range from 490 nm to 530 nm or up to 520 nm, while in the wavelength range below 470 nm and / or in the wavelength range greater than 530 nm the light intensity is only a fraction of the peak intensity and / or very low is.

Such a strong light in the cyan range has, on the one hand, a high melanopic effectiveness with reduced luminance levels, while on the other hand the risk of blue light is very small or quite limited.

In general, the at least one light module for irradiating the viewing body can be configured in such a way that relatively high intensities (radiation levels) are present in the wavelength range from approximately 470 nm to 550 nm or from 480 nm to 540 nm or 490 nm to 530 nm, while in wavelength ranges less than 470 nm nm and / or greater than 550 nm, relatively low intensities are present.

As an alternative or in addition to an operating mode with strong cyan light, the at least one lamp module for irradiating the viewing body can, however, also have other operating modes with other light colors and / or spectral distributions in order to be able to provide other light effects. In particular, the named lamp module can be designed to be changeable with regard to its primary light color and / or its spectral distribution, for example by assigning several LEDs of different light color as a light source to the lamp module. For example, different colored LED clusters can be used, which can be variably controlled in order to realize different light colors and / or spectral distributions.

Independently of this, the at least one lamp module for irradiating the work table can advantageously be designed close to daylight with regard to its spectral distribution and / or have an operating mode close to daylight. The light module for irradiating the work table can also be designed to be variable with regard to its spectral distribution and / or light color, for example by means of LEDs of different colors, which can be assigned to the respective reflector and / or the respective lens.

In order to avoid reflected glare from the light thrown on the table, the at least one lamp module for irradiating the work table can be designed in such a way that the emitted light is in a vertical plane that goes through the lamp module and through the intended seating or standing area Table goes, has significantly lower light intensities than in an area lying to the right or left of said level. For example, a wedge-shaped area in the range of +/- 5 ° or +/- 10 ° or +/- 20 ° around the said vertical plane can be masked out and / or only have a fraction of the maximum light intensity that can be achieved in one of the said plane more inclined area is present.

Such a masking out or light intensity reduction in the central area under the respective lamp module prevents light hitting the work table or objects on it from being reflected in the direction of the face of the user who is seated or standing at the table as intended. The light emitting areas inclined laterally to the left and / or right do not harbor this reflective glare problem, as the light emitted obliquely to the left or right is also reflected by the table, but is reflected laterally past the user on the left or right.

In particular, the respective lamp module for irradiating the work table can have an optical element in the form of a reflector and / or a lens which emits the light captured by the light source or sources of the lamp module in a batwing-like distribution. Such a batwing distribution has two bright, approximately club-shaped emission areas or light cones inclined towards one another, between which there is a very faint or even completely shielded intermediate area. The aforementioned bright cones or lobes or pyramids can each have a main direction of radiation that extends from above at an acute angle to the work table, for example at an angle of inclination to the vertical of +/- 5 ° to +/- 45 ° and / or + / - 10 ° to +/- 30 °.

Regardless of the specific angle of inclination of the main radiation direction, the aforementioned bright radiation spaces can have a widening angle of approximately 10 ° to 45 ° or 15 ° to 25 °.

Such a batwing distribution can be generated, for example, by double-shell-shaped or double-pear-shaped reflectors, in front of whose central rib or central elevation the light source can be positioned. In principle, however, other designs of the optical element are also possible. For example, such batwing distributions can also be generated by means of a suitably contoured lens.

Said optical element advantageously completely captures the light emitted by the light source. In particular, the light source can irradiate a half-space facing the reflector and / or the lens can have a cup-shaped entry surface in which or at the edge of which the light source can be arranged.

In an advantageous development of the invention, an intelligent control device can adapt the lighting scenario caused by the lighting assembly at the workplace individually to the respective user and / or the ambient conditions, such a control device advantageously working semi-automatically or fully automatically and at least one or more operating parameters of the lighting assembly depending on one or can adapt several detected or specific user needs and / or environmental conditions. Said control device can preferably individually control the at least one lamp module for irradiating the visible body and the at least one lamp module for irradiating the work table in order to make the best possible use of the advantages of the decoupling between non-visual and visual properties.

In order to individually adjust the lighting scenario for the respective user or his / her behavior and / or state, a detection device for detecting the user behavior and / or state can be provided in a further development of the invention, so that the control device is dependent on the detected user behavior and / or state. state the lighting scenario can be set variably. Such a detection device can include, for example, a camera and / or one or more imaging sensors and / or a motion sensor in order to detect relevant characteristics of the user behavior and / or the user state by means of sensors.

For example, the detection device can use a suitable sensor system to determine a user activity of the user located at the work table, for example on the basis of a movement pattern and / or a movement frequency and / or a movement amplitude of one or more limbs. For example, the frequency and / or amplitude of nodding movements or other movements of the user's head and / or movements of the user's forearms and / or the user's upper body can be recorded using a camera or other sensor system, with an evaluation device determining from the recorded movement variables can determine whether the user is actively moving around the desk or sitting or standing rather inactive at the desk.

Alternatively or additionally, the size and / or opening width of the eyes of a user and / or the frequency of the opening of the eyelids can also be recorded by means of an imaging sensor system in order to infer a more tired or more active user.

Independently of this, the acquisition device can in particular also acquire or determine a viewing angle or a viewing direction of the user, for example by means of a camera observing the face of a user. The detection device can for example be designed to detect the respective time portion of different viewing directions, for example in such a way that the detection device determines which areas of the work table and / or which areas of the viewing body are viewed by the user's eyes for how long.

Depending on the user behavior and / or status mentioned, the control device can variably set the light module for irradiating the visible body and / or the light module for irradiating the table. If, for example, an active, relatively strongly moving user is detected, the irradiation of the viewing body can be dimmed down and / or the lighting module for irradiating the work table can be set to illuminate the work table uniformly and / or substantially completely. If, on the other hand, a rather tired, inactive user is determined, the irradiation of the viewing body can be increased and / or the spectrum can be increased to a strong cyan component in order to increase the melanopic effect, and / or the light module for irradiating the work table can be controlled in this way that the workbench section immediately in front of the user is brightened more strongly.

Alternatively or in addition, depending on a detected position and / or a detected movement area of the user, irradiation of the work table that is different in zones can be initiated. In particular, the Control device control the lighting modules in such a way that the section of the work table in which or in front of which the user is located or moves is illuminated more brightly than another section of the work table that the user obviously does not use due to the detected position and / or the detected range of motion .

Said control device can automatically adjust the respective change in the operating parameter of the at least one lamp module for irradiating the viewing body and / or of the at least one lamp module for irradiating the work table as a function of the behavior characteristics detected by the detection device. Alternatively, however, a semi-automatic control system can also be provided which, for example, offers the user certain options and then sets the lighting scenario accordingly after selecting an option. For example, the activity options "very tired - tired - normally awake - wide awake" can be offered on a display device such as a touchscreen, whereupon the user can select, for example, very tired, whereupon the control device then sets the lighting scenario in the manner described for a very tired, inactive one User can adjust.

Such a semi-automatic control can advantageously also be designed to work adaptively, for example in such a way that the described detection device detects a user behavior and / or state and the selection options are adapted as a function of the detection. If, for example, an active user is detected by sensors, he can only be offered the selection options normally awake or wide awake, for example.

Said control device can advantageously be made electronically and in particular comprise a microprocessor and a program memory in order to initiate predetermined evaluation processes and / or control commands by means of software stored in the program memory on the basis of transmitted sensor signals of the detection device, which then lead to a corresponding setting of the lamp modules.

The control device can advantageously have a memory device or can be connected to such a memory device in which various data such as sensor data, light setting data or personalization data can be stored. Independently of such a storage device, the control device can also be designed to be connected to a cloud in order to exchange data and / or control commands with such a cloud.

The control device can advantageously also have an interface in order to be able to be controlled via an app from another device such as a smartphone or a tablet. Alternatively or additionally, a software module can also be imported into the control device via such an interface, for example in order to be able to adapt or update control functions. Alternatively or additionally, remote maintenance and / or an analysis of locally stored data to improve set lighting scenarios can be carried out via such an interface.

As an alternative or in addition to the user behavior and / or status mentioned, the control device can also variably set the lighting scenario as a function of other usage parameters and / or conditions of use. In particular, a detection device can be provided for detecting objects on the work table, for example comprising one or more cameras and / or imaging sensors and / or other suitable sensors, such as a book and / or a coffee cup and / or a computer keyboard on the work table be able. Such an object detection can include, for example, contour detection and / or pixel evaluation in a camera image.

The control device can advantageously control the lamp modules in an intelligent manner in a variable manner as a function of an object detected in each case on the work table. For example, the light modules for zone-wise irradiation of the work table can be controlled in such a way that a work table area in which a book has been recorded is illuminated more brightly than the rest of the work table areas.

As an alternative or in addition, the at least one lamp module for irradiating the visible body can also be controlled variably depending on a detected object on the table, for example in order to reduce the shadow cast by increasing the diffuse portion of light that is emitted by the visible body above the work table, which can be caused by an object lying on the work table. If, for example, it is detected with the aid of the above-mentioned detection device that a ruler is being used to draw on the work table, the reflective visual body, in particular a diffusely reflecting section thereof, can be more strongly irradiated by the lamp module for irradiating the upright visual body in order to increase the diffuse light component on the To get the work table, which then reduces the shadow formation.

Said detection device for detecting objects on the work table can in particular be designed to detect a position of the object on the work table and / or a size of the object and / or a thickness of the object. The thickness in particular can be relevant when it comes to the question of how shadows are cast. Said detection device can comprise, for example, a camera or an imaging sensor. Alternatively or additionally, sensors can also be provided on the work table, which can for example detect contact between an object and the table surface and / or determine the weight or the pressure of an object on the table top.

Such contact and / or weight sensors and / or sensors working in other ways on the work table can also be used to detect the position and / or the movement pattern of the user on the work table, in which case the sensors mentioned can in particular be designed to do so to detect the position of the hands and / or forearms when they are resting on or touching the work table.

In a further development of the invention, the control device can also be designed to variably control the lamp modules as a function of the presence of a user. This can be used in particular to operate the lighting device in an energy-efficient manner. If the detection device determines, for example, that there is no user at the work table, the light assembly can be dimmed down or switched off completely. Conversely, if a user is detected at the work table, the light modules can be raised in terms of their light intensity.

Independently of this, it can also be advantageous if the control device can set or select different default settings for the lighting scenario for different users. For this purpose, a detection device can be provided for identifying the respective user, wherein such an identification device can include, for example, a camera and face recognition. Alternatively or additionally, however, an identification code that identifies the respective user can also be read out, for example from an RFID tag that the user can carry as a personal card. Alternatively or additionally, the control device can also include an input device by means of which a respective user can enter his name or another identification code in order to then automatically set the desired, individual lighting scenario as a function of the entered or read-in identification code.

In an advantageous development of the invention, the control device can also take into account other conditions of use for the individual setting of the lamp modules. For example, the control device can take into account the time of day and / or the season in order, for example, to set greater brightnesses in the morning and evening than around noon and / or to increase the non-visual light effects in winter, for example by more powerful irradiation of the upright light body and / or Increase in the proportion of cyan light in order to increase the melanopically effective amount of light absorbed by the eye.

As an alternative or in addition, the control device can also take into account local light intensities or brightnesses. For example, a light sensor can detect the brightness at the workplace in order to then individually control the lighting modules by the control device as a function of the light detected by sensors at the workplace. For example, the control device can dim the light modules as a function of the detected brightness, in particular increase or decrease them, in order to achieve sufficient brightness at the work table.

Alternatively or additionally, however, the control device can also control the lamp modules in such a way that the light color and / or the spectrum of the light emitted by the lamp assembly is changed as a function of the ambient light detected by sensors. If, for example, it is detected by sensors that there is a very warm ambient light due to morning or evening red, the control device can, for example, control the lamp modules in such a way that they also emit a warmer light in order to adapt to the ambient light color.

Alternatively or additionally, the control device can also control the lamp modules in such a way that the lighting is adapted as a function of sensor-recorded environmental parameters that do not relate to the lighting situation, such as ambient temperature, CO _{2 content of the air or noise level.} If, for example, a high level of noise is detected by sensors, the user can be focused by increasing the illuminance in the area of a visual task.

As an alternative or in addition, the control device can also control the light assembly as a function of at least one operating parameter of a monitor used on the work table. For example, a detection device for detecting the screen brightness can be provided, depending on the detected screen brightness to individually control at least one lamp module for irradiating the work table and / or the at least one lamp module for irradiating the light body. For example, when a higher brightness of the screen display is detected, a light module that irradiates a table section located in front of the screen can be dimmed up in order to also illuminate objects located in front of the screen, such as a keyboard. Conversely, if no or only a very low screen brightness is detected, the work table section surrounding the screen can be irradiated less.

Alternatively or additionally, depending on a parameter of the monitor, in particular its screen display, the at least one lamp module for irradiating the viewing body can also be controlled in a variable manner. In particular, the light color or color temperature of the light which irradiates the viewing body can be adapted to the color of the screen display in the edge areas of the monitor in order to achieve ambient lighting that gives the feeling of a continuing or enlarged screen. If, for example, a purple-colored or predominantly purple-colored screen display is displayed on the screen, in particular at its edges, the visual body panel located behind the screen can also be irradiated with purple or purple-tinged light.

In a further development of the invention, the control device can also influence the control of a monitor located on the work table or its screen display in the opposite direction. In particular, the control device can be designed to adapt the screen display of the monitor to the irradiation of the viewing body and / or the irradiation of the work table. If, for example, the upright viewing panel is irradiated with a high cyan content and / or irradiated with an increased light intensity in order to achieve an increased melanopic light effect, the control device can adapt the monitor display depending on the spectrum and / or the light intensity of the light irradiating the viewing body, for example to this effect that the color of the screen display is increased and / or shifted towards the cyan light spectrum and / or the brightness of the screen is increased when the viewing body and / or the work table are irradiated relatively brightly.

• 1: eine perspektivische Ansicht einer Beleuchtungsvorrichtung zum Beleuchten des Arbeitsplatzes an einem Arbeitstisch, wobei nach einer vorteilhaften Ausführung der Erfindung der aufrechte, reflektierende Sichtkorpus ein an der Rückseite des Tisches angeordnetes Sichtpanel und eine längliche Leuchtenbaugruppe umfasst, die an einem oberen Randabschnitt des Sichtpanels auskragend angeordnet ist und einerseits Leuchtenmodule zum Bestrahlen des Sichtpanels und andererseits Leuchtenmodule zum Bestrahlen des Arbeitstisches umfasst,
• 2: eine Seitenansicht der Beleuchtungsvorrichtung aus 1, die die Anordnung des Sichtpanels und der länglichen Leuchtenbaugruppe oberhalb des Arbeitstisches zeigt,
• 3: eine Frontalansicht der Beleuchtungsvorrichtung aus den vorhergehenden Figuren in der Blickrichtung eines den Arbeitstisch nutzenden Nutzers,
• 4: eine Schnittansicht durch die längliche Leuchtenbaugruppe aus den vorhergehenden Figuren, die die separaten Leuchtenmodule zum Bestrahlen des Sichtpanels und zum Bestrahlen des Arbeitstisches zeigt, wobei jedes der gezeigten Leuchtenmodule einen muschelförmigen Reflektor und eine in den muschelförmigen Reflektor strahlende Lichtquelle in Form einer oder mehrerer LEDs umfasst,
• 5: eine Seitenansicht der Beleuchtungsvorrichtung ähnlich 2, wobei die von den Leuchtenmodulen bestrahlten Abstrahlräume dargestellt sind,
• 6: eine Draufsicht auf den Arbeitstisch und die diesem zugeordnete Beleuchtungsvorrichtung aus den vorhergehenden Figuren, die das an der Tischrückseite aufrecht angeordnete Sichtpanel und die oberhalb des Arbeitstisches angeordnete, längliche Leuchtenbaugruppe zeigt,
• 7a und 7b: jeweils eine vergleichende, perspektivische Darstellung der auf den Arbeitstisch gestrahlten Lichtkegel bzw. -strahlungsräume, wobei in der 7a die von einem Lichtkegel bewirkte Reflexblendung zeigt und die 7b einen Lichtkegel zeigt, deren Reflexstrahlung am Nutzer vorbeigeht und diesen nicht blendet,
• 8a und 8b: eine Darstellung einer Batwing-Lichtstärkenverteilung zur Vermeidung der Reflexblendung eines Nutzers des Arbeitstisches durch vom Arbeitstisch reflektiertes Licht, und
• 9 verschiedene Varianten von Reflektorausbildungen zum Erzeugen der Batwing-Lichtverteilung aus 8 .
• 10: ein Diagramm, das den Wellenlängenbereich einer Cyanlicht-Anreicherung im Vergleich zu den melanopischen und photopischen Wirkfunktionen und im Vergleich zur Blaulichtgefährdungsfunktion zeigt.

The invention is explained in more detail below with reference to preferred exemplary embodiments and associated drawings. In the drawings show:

• 1 : a perspective view of a lighting device for illuminating the workplace on a work table, wherein, according to an advantageous embodiment of the invention, the upright, reflective viewing body comprises a viewing panel arranged on the back of the table and an elongated lighting assembly which is arranged in a cantilever manner on an upper edge portion of the viewing panel and on the one hand light modules for irradiating the viewing panel and on the other hand light modules for irradiating the work table,
• 2 : a side view of the lighting device from 1 showing the arrangement of the viewing panel and the elongated light assembly above the work table,
• 3 : a front view of the lighting device from the previous figures in the viewing direction of a user using the work table,
• 4th : a sectional view through the elongated lamp assembly from the previous figures, showing the separate lamp modules for irradiating the viewing panel and for irradiating the work table, each of the lamp modules shown comprises a shell-shaped reflector and a light source radiating into the shell-shaped reflector in the form of one or more LEDs ,
• 5 : a side view similar to the lighting device 2 , whereby the radiation areas irradiated by the luminaire modules are shown,
• 6th : a top view of the work table and the lighting device assigned to it from the previous figures, showing the viewing panel arranged upright on the back of the table and the elongated light assembly arranged above the work table,
• 7a and 7b : in each case a comparative, perspective illustration of the light cones or radiation spaces radiated onto the work table, with 7a shows the reflected glare caused by a cone of light and the 7b shows a cone of light, the reflected radiation of which passes the user and does not dazzle him,
• 8a and 8b : a representation of a batwing light intensity distribution to avoid the reflected glare of a user of the workbench by light reflected from the workbench, and
• 9 different variants of reflector designs for generating the batwing light distribution 8th .
• 10 : a diagram showing the wavelength range of a cyan light enrichment in comparison to the melanopic and photopic active functions and in comparison to the blue light hazard function.

As 1 shows comprises the lighting device 1 a panel-like, reflective visual corpus 2 standing upright on a back of a work table 3 may be appropriate. The rear mentioned refers to the side of the table that is intended for sitting or standing 4th one at the work table 3 working user 5 opposite. This can usually be a long side.

The lighting device 1 further comprises a preferably elongate light assembly 6th for irradiating said panel-like visible body 2 and for irradiating the work table 3 .

As the 1 until 3 can show the said visual corpus 2 Form an at least approximately flat panel that extends essentially along an entire longitudinal side of the work table 3 can extend and in the height direction from the table edge of the work table 3 can extend upwards from about 50 cm to 150 cm. In principle, however, there are also other contours of the visible body 2 possible, as explained at the beginning.

The named visual corpus 2 can have a smooth, light and preferably slightly roughened, reflective surface, for example, be formed matt white. As an alternative or in addition, at least a section of the viewing body can 2 or its surface can also be contoured facet-like and / or scale-like and / or Fresnel-like in order to direct light towards the user 5 to be able to radiate, as already explained at the beginning. For example, right and left edge strips of the viewing body 2 be structured in the manner mentioned facet-like, while a central partial surface can be diffusely reflective, for example matt white.

As 1 shows, the elongated light assembly can 6th along an upper edge portion of the viewing body 2 essentially parallel to the longitudinal axis of the work table 3 and from the viewing body 2 extend slightly spaced. For example, a gallows-shaped from the upper edge portion of the viewing body 2 cantilevered lamp carrier 7th be provided so that the light assembly 6th approximately parallel to the visible body 2 slightly spaced from this and / or horizontally along the upper edge portion of the viewing body 2 can extend.

The light assembly is advantageous 6th above a rear, that is, from the user 5 arranged facing away from the table half, in particular approximately at the level of an upper edge of the viewing body 2 .

As 4th and 5 make clear, owns the light assembly 6th at least one light module 8th , which is the visual corpus 2 irradiated, and at least one lamp module 9 that is the work table 3 irradiated.

That the visual corpus 2 irradiating lamp module 8th can be designed in the manner of a wall washer, around the visible body 2 irradiate evenly over its height or with an approximately constant illuminance.

The said light module 8th can have a radiation area 8a own that on the view corpus 2 is limited and advantageously extends over its entire height, at least approximately over the entire height.

The said light module 8th can use the panel-like visible body 2 Irradiate with an acute angle grinding, in particular with an acute angle grinding from above. Independently of this, the luminaire module can 8th have a main radiation direction that is inclined at an acute angle to the vertical and / or at an acute angle to the viewing body 2 is directed.

Independently of this, the light assembly 6th a plurality, for example 5 to 10 or even more than 10, of such light modules 8th include running along the longitudinal axis of the light assembly 6th can be arranged side by side, so that the light assembly 6th although viewed as a whole it is linearly contoured, but a large number of lighting modules arranged next to one another 8th includes, their radiation rooms 8a all on the visible body 2 are directed and can overlap and / or complement to collectively the entire visual body 8th to irradiate.

As the 4th and 5 can show the luminaire modules 8th each a shell-shaped reflector 8b include, whose concave surface, which is active in terms of lighting technology, corresponds to the visible body 2 is facing. For example, one from the edge of the reflector 8b defined area or plane approximately parallel to the visible body 2 be aligned.

The said reflector 8b preferably catches the whole of a light source of the light module 8th emitted light. The light source 8c can include one or more LEDs that radiate into a half-space, in particular into the concavely curved reflector surface. The light source 8c can therefore from the view corpus 2 radiate away so that the reflector 8b the light on the viewing body 2 diverts.

Alternatively or in addition to such a reflector 8b can the luminaire modules 8th also a lens 8d include that the light in the desired way on the viewing body 2 directs, cf. 8th .

Around the work table 3 to irradiate includes the light assembly 6th furthermore luminaire modules 9 that are also along the length of the light assembly 6th can be arranged in a row next to one another, in particular parallel to the row of lamp modules 8th in the immediate vicinity.

The luminaire modules 8th for irradiating the visible body 2 and the luminaire modules 9 for irradiating the work table 3 in a matrix-like arrangement in a common luminaire housing 10 be arranged and / or combined to form a common lighting assembly, which can have a uniform appearance per se.

The luminaire modules 9 for irradiating the work table 3 advantageously have a main radiation direction that is perpendicular down to the work table 3 and / or can be inclined slightly at an acute angle to the vertical, the lighting modules 9 can advantageously emit in the form of a batwing distribution, as will be explained below.

As 5 shows, the radiation area can 9a of the luminaire modules 9 on the work table 3 be limited, whereby the radiation area of a luminaire module 9 advantageously essentially over the entire depth of the work table 3 can extend. The radiation areas 9a of the luminaire modules lined up in a row 9 can overlap one another and / or complement one another without overlapping, in order to essentially cover the entire workbench together 3 to be able to irradiate. Each lamp module is advantageously irradiated 9 only a section of the work table 3 so that the work table 3 by controlling individual luminaire modules 9 can be illuminated differently zone by zone.

To minimize reflections on a screen 11 can be produced by the luminaire modules 9 at least approximately in one through the monitor 11 going level be arranged, cf. 5 , or only have a relatively limited offset, so that the emitted light is only very flat on the monitor 11 falls and does not cause any reflections or reflections there and also cannot cause large shadows to be cast.

As 4th shows, the luminaire modules can also 9 an optical element in the form of a reflector 9b include that of a light source 9c of the respective luminaire module 9 Capture emitted light preferably completely and on the work table 3 can throw. The reflectors mentioned 9b can for example be shell-shaped or double-shell-shaped and the work table with a concave, light-technically active surface 3 be facing.

The reflectors are advantageous 9b and also the reflectors 8b arranged and designed in such a way that an intended use on the work table 3 seated or standing user 5 not in the light sources 8c or. 9c can see.

In particular, a room area 12th above a level 13th on the one hand by the elongated light assembly 6th goes and on the other hand from the front edge of the work table 3 is supported, be dimmed. Since a user does not usually work with his eyes or face directly at table height, the mentioned level can also be set a little flatter, that is, do not go through the front edge of the table, but rather run a little way above the edge of the table. The said level is advantageous 13th that the shaded area of the room 12th limited on the workstation side, but clearly sloping downwards towards the workstation compared to the horizontal, cf. 5 . For example, the said level 13th that the shaded area of the room 12th limited downwards, for example, inclined at an angle of less than 70 ° or less than 60 ° or less than 50 ° to the vertical, cf. 5 .

The above-mentioned dimming of the room area 12th can through the reflectors 8b , in particular the edges of the optically active surfaces and / or by an edge web of the housing 10 be effected, cf. 4th .

As the 8th and 9 can show the optical elements of the luminaire modules 9 , in particular the reflectors mentioned 9b and / or correspondingly contoured lenses a batwing-like light distribution of the light modules 9 effect. A batwing distribution like her 10 shows, can have two relatively narrow radiation spaces, for example radiation cones or pyramids, each of which radiates downwards at an acute angle to the vertical and with respect to a vertical plane that passes through the luminaire module 9 and the user 5 at the work table 3 goes, be arranged spread. To put it the other way round, the batwing distribution can be around the aforementioned vertical plane that passes through the luminaire module 9 and the user 5 goes, a dimmed or dim area of the room 14th own. A respective luminaire module shines through the batwing-like light distribution 9 obliquely to the right below and / or obliquely to the left below, the main emission directions being the brightest Radiation areas 15th for example, can be inclined at an angle of +/- 10 ° to +/- 30 ° to the vertical, cf. 10 . In a spatial area of, for example, +/- 10 ° or +/- 20 ° around the named vertical plane, the dimly lit or dimmed room area 14th lie.

As 7b made clear, the batwing distribution can cause reflected glare for the user 5 be avoided. It is true that even with a Batwing distribution, this is done on the workbench 3 radiated light from the work table 3 reflected. However, the reflected radiation goes to the left and right of the user 5 and does not hide it. In comparison, the 7a the reflected glare, which usually occurs when a spotlight that emits strong light is also used in the central area. If this spotlight is arranged diagonally above the user in a vertical plane, the light reflected from the work table falls into the user's eyes.

As 9 shows the desired batwing distribution according to FIGS 8a and 8b can be achieved through various reflector designs. For example, separate, for example shell-shaped, separate reflectors can be used to achieve the two emission areas of the batwing distribution, but a one-piece, for example double-pear-shaped reflector can also be used to achieve such a batwing distribution.

On the other hand, it shows 9 also that such a batwing distribution can also be achieved by means of one or more lenses that are assigned to one or more light sources.

The luminaire modules 8th and 9 can from an electronic control device 16 be controlled independently of one another in order to adapt the lighting scenario individually to the respective user and / or the ambient conditions, as was explained at the beginning.

The control device 16 can in this case signals from a detection device 17th received, which can have different sensors for detecting different user and / or environmental characteristics, for example at least one camera and / or an imaging sensor and / or a motion sensor, for example on the housing 10 the lighting device 1 can be attached to the work table 3 and / or the user 5 to be able to capture.

Alternatively or additionally, the detection device 17th also directly at the work table 3 Have attached sensors, for example in the form of touch sensors and / or pressure sensors.

Alternatively or additionally, light sensors can be used to detect brightness levels in different areas on or above the work table 3 be provided.

Alternatively or additionally, the control device 16 an input device 18th for example in the form of a touchscreen, for example to enter a user identification or to be able to select offered selection options.

Said control device 16 can work in different operating modes in the manner already explained in the introduction to the lighting scenario at the work table 3 individually adapt or change.

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• DE 202012004264 U1 [0005]

Claims (43)

Lighting device for illuminating a workplace on a work table (3), with a flat visible body (2) which is arranged upright on at least one side of the work table (3) opposite the workplace and is designed as a reflector, as well as at least one light assembly (6) for irradiation of the visible body (2) and for irradiating the work table (3), characterized in that the lamp assembly (6) comprises separately controllable lamp modules (8, 9) for irradiating the visible body (2) on the one hand and the work table (3) on the other hand independently. Lighting device according to the preceding claim, wherein the separately controllable lamp modules (8, 9) are accommodated in a common housing (10) or are arranged on a common lamp carrier as a uniform assembly. Lighting device according to one of the preceding claims, wherein the at least one lamp module (8) for irradiating the visible body (2) on the one hand and the at least one lamp module (9) for irradiating the work table (3) on the other hand have at least substantially overlap-free emission spaces (8a; 9a) , wherein the radiation space (8a) of the light module (8) irradiating the visible body (2) is limited to the visible body (2) and / or at least largely leaves out the work table (3), and the radiation space (9a) of the work table (3) irradiating lamp module (9) is limited to the work table (3) and / or at least largely leaves out the visible body (2). Lighting device according to one of the preceding claims, wherein the at least one lamp module (8) for irradiating the visible body (2) on the one hand and the at least one lamp module (9) for irradiating the work table (3) have main emission directions inclined at an acute angle to one another, the main emission direction of the visible body (2) the irradiating lamp module (8) is inclined at an acute angle to the vertical and directed towards the viewing body (2), while the main direction of radiation of the lighting module (9) irradiating the work table (3) is aligned vertically and / or inclined at an acute angle to the vertical from the viewing body (2) is directed away from the work table (3). Lighting device according to one of the preceding claims, wherein the at least one lamp module (8) irradiating the visible body (2) is designed as a wallwasher which irradiates the visible body (2) from an edge section of the visible body (2) in an acute-angled grinding manner, in particular with one over the Height of the visible body (2) essentially constant illuminance. Lighting device according to one of the preceding claims, wherein the at least one lamp module (8) for irradiating the visible body (2), viewed in a vertical sectional plane perpendicular to the visible body (2), has a radiation area (8a) with a widening angle of 30 ° to 80 ° or 35 ° to 65 ° and / or has a radiation area (8a) which extends between a horizontally aligned upper edge and a lower edge inclined at an acute angle to the vertical, in particular at an angle of 5 ° to 35 ° to the vertical. Lighting device according to one of the preceding claims, wherein the luminaire assembly (6) has a plurality of luminaire modules (8) for irradiating the viewing body (2), which have overlapping and / or complementary emission spaces (8a) which, viewed individually, each have only part of the Irradiate the visible body and, viewed together, essentially irradiate the entire visible body (2). Lighting device according to the preceding claim, wherein said plurality of lamp modules (8) for irradiating the viewing body (2) are arranged side by side along a line which extends at least approximately parallel to the viewing body (2) and parallel to the work table (3). Lighting device according to one of the preceding claims, wherein the at least one lamp module (9) for irradiating the work table (3) has a radiation area (9a) which, viewed in a vertical plane perpendicular to the viewing body (2), includes the vertical and an expansion angle in the range of 30 ° to 70 ° or 40 ° to 60 ° and / or extends essentially over the entire depth of the table (3). Lighting device according to one of the preceding claims, wherein the luminaire assembly (6) - (a) comprises several, preferably more than 5, luminaire modules (9) for irradiating the work table (3), the radiating spaces (9a) complementing one another. which, viewed individually, irradiate only a section of the work table (3) and, viewed together, essentially irradiate the entire work table (3), preferably each radiation area (9a) - viewed individually - a section of less than 50% or less than 30 % of the entire work table (3) irradiated, and / or - (b) several, preferably more than 5, lamp modules (8) for irradiating the visible body (2), which have complementary emission spaces (8a) which, viewed individually, each have only one Irradiate partial section of the visible body (2) and, viewed together, essentially irradiate the entire visible body (2), with each radiation area (8a) - considered individually - irradiating a partial segment of less than 50% or less than 30% of the entire visible body (2) . Lighting device according to the preceding claim, wherein the plurality of light modules (9) for irradiating the work table (3) and / or the light modules (8) for irradiating the viewing body (2) are arranged side by side along a line which is at least approximately parallel to the work table and extends parallel to the visible body (2). Lighting device according to one of the two preceding claims, wherein the lamp modules (9) for zone-wise different irradiation of the work table (3) can be controlled independently of one another and / or individually, and / or the lamp modules (8) for zone-wise different irradiation of the visible body (2) independently can be controlled from each other and / or individually. Lighting device according to one of the preceding claims, wherein the lamp assembly (6) forms an elongated, preferably cuboid, lamp body which extends parallel to the work table (3) and parallel to the viewing body (2) spaced from the viewing body (2) above the work table (3) . Lighting device according to one of the preceding claims, wherein the light assembly (6) is arranged above a rear table half opposite the work station. Lighting device according to one of the preceding claims, wherein at least one of the lighting modules (8, 9) has an optical element for forming a radiation space (8a; 9a) which is rectangular and / or pyramidal in cross section. Lighting device according to one of the preceding claims, wherein at least one of the lamp modules (8, 9) has a shell-shaped or double shell-shaped reflector (8b), the concave, light-technically active reflector surface facing the viewing body (2) and / or the work table (3) and the light emitted by the light source (8c; 9c) of the lamp module (8, 9) essentially completely captures it and radiates it past the light source. Lighting device according to one of the preceding claims, wherein at least one of the lamp modules (8, 9) has a lens which is set with a cup-shaped contoured light entry surface over the light source (8c; 9c) of the lamp module (8; 9) and which is emitted by the light source Basically completely captures light. Lighting device according to one of the preceding claims, wherein the light assembly (6) has a shaded area (12) which is limited down to the work table (3) by a plane (13) which goes through the light assembly (6) and is at least extends approximately parallel to the table edge of the work table (3) facing the workplace, said plane (13) going through said table edge of work table (3) or extending above said table edge, said plane (13) being different from that of the Luminaire assembly (6) drops towards said table edge. Lighting device according to the preceding claim, wherein said space area (12) is masked out from light emitted by the lamp modules (8, 9) and essentially only light reflected by the viewing body (2) and / or the work table (3) is masked out in said masked-out light Space area (12) occurs. Lighting device according to one of the preceding claims, wherein the at least one lamp module (9) for irradiating the work table (3) has an optical element for forming a radiation space (9a) which is located in a vertical plane through the lamp module (9) and the workplace at The work table (3) has a screened or weak area of the room and to the left and / or right of the screened or weak room area has a bright radiation area whose main direction of radiation is inclined downward at an acute angle to the vertical and / or a widening angle of 5 ° to 45 ° or 10 ° to 25 °. The lighting device according to the preceding claim, wherein said optical element is configured to form a batwing light distribution or arrow-wing-like light distribution with two high-intensity radiation areas inclined at an acute angle to one another and a dimmed and / or low-light area in between. Lighting device according to one of the preceding claims, wherein the at least one lamp module (8) for irradiating the light body (2) on the one hand and the at least one lamp module (9) for irradiating the work table (3) on the other hand have different light colors and / or different spectra. Lighting device according to one of the preceding claims, wherein the at least one lamp module (8) for irradiating the viewing body (2) has a spectral distribution with a maximum of cyan and / or emits cyan-colored light in at least one operating mode. Lighting device according to the preceding claim, wherein the lamp module (8) for irradiating the viewing body (2) in at least one operating mode has high radiation intensities in the wavelength range of 480 nm to 540 nm or 490 nm to 530 nm and low radiation intensities in wavelength ranges of less than 470 nm and greater than 560 nm. Lighting device according to one of the preceding claims, wherein at least one of the lamp modules (8, 9) is designed to be variable with regard to its light color and / or its emitted spectrum, in particular comprises LEDs of different colors as light sources that are individually controllable and / or dimmable. Lighting device according to one of the preceding claims, wherein the visible body (2) - (a) Extends essentially along the entire length of the edge of the table opposite the workstation (2) and extends upwards beyond said edge of the table by 0.3 m to 1.5 m or 0.5 m to 1 m, and /or - (b) in relation to the workplace at the work table (3) a field of vision of at least twice 30 ° or twice 30 ° to twice 60 ° or twice 30 ° to twice 90 ° and vertically up to at least 10 ° below the horizontal or up to to the horizontal or 10 ° above the horizontal. Lighting device according to one of the preceding claims, wherein the visible body (2) comprises a flat, upright panel on the rear of the work table (3). Lighting device according to one of the preceding claims, wherein the visible body (2) has a diffuse degree of reflection of more than 80% or more than 90% and / or has a matt white surface. Lighting device according to the preamble of Claim 1 or one of the preceding claims, wherein the visual body (2) has a facet-like reflector structure and / or a Fresnel-like surface structure for the directional reflection of the light captured by the lamp assembly (6) across the work table (3) towards the face of a person who is intended to be at the workplace owns. Lighting device according to the preceding claim, wherein at least a partial area of the viewing body (2) is provided with said facet-like reflector structure and comprises more than 25 or more than 50 or more than 100 reflector facets. Lighting device according to the preamble of Claim 1 or one of the preceding claims, wherein an electronic control device (16) is provided for controlling the light assembly (6) as a function of user behavior and / or state. Lighting device according to the preceding claim, wherein a detection device (17) is provided for detecting a movement frequency and / or a movement amplitude and / or a movement pattern of a limb of the user and the control device (16) is configured to at least one operating parameter of the light assembly (6) to be set variably as a function of the detected movement frequency and / or the detected movement amplitude and / or the detected movement pattern. Lighting device according to one of the two preceding claims, wherein a detection device (17), preferably comprising a camera, is provided for detecting the viewing direction of the user and the control device (16) is configured to set at least one operating parameter of the light assembly as a function of the detected viewing direction and / or variable depending on the time proportions of different viewing directions. Lighting device according to one of the preceding claims, wherein a detection device (17) is provided for detecting the eye opening area and / or the eyelid movement frequency and the control device (16) is designed to set at least one operating parameter of the light assembly (6) as a function of the detected eye impact area and / or of the recorded blinking frequency can be set variably. Lighting device according to one of the preceding claims, wherein the control device (16) is designed to control the lighting assembly (6) in the event of inactivity or tiredness signaling user behavior and / or status so that the melanopic effectiveness of the emitted light is increased and / or at a high activity and / or alertness indicating user behavior and / or condition to increase the illumination of the work table (3). Lighting device according to one of the preceding claims, wherein a Detection device (17) is provided for detecting the position and / or the viewing direction and / or the range of motion of a user and the control device (16) is designed to control the light assembly (6) so that one of the detected position and / or the viewing direction and / or the detected movement area near the zone of the work table (3) is illuminated more brightly than one of the mentioned position and / or the viewing direction and / or the mentioned movement area remote zone of the work table. Lighting device according to one of the preceding claims, wherein a detection device (17) is provided for detecting objects on the work table (3) and the control device (16) is designed to activate the light assembly (6) as a function of an object detected on the work table (3) ) to be controlled variably. Lighting device according to the preceding claim, wherein the control device (16) is designed to - (a) to control the light assembly (6) depending on the detected object in such a way that a zone of the work table (3) in which the object was detected is illuminated brighter than another zone of the work table (3), and / or - (b) when detecting a shadow-casting object on the work table (3) to control the light assembly (6) in such a way that a diffusely reflected diffuse light component from the viewing body (2) is increased. Lighting device according to one of the preceding claims, wherein a detection device (17) is provided for detecting the brightness and / or a light color of a screen display of a monitor (11) located on the work table (3) and the control device (16) is designed to control the light assembly (6) to variably control the screen color of the monitor (11) as a function of the detected brightness and / or the detected light color, in particular to match the light color of the light radiated onto the viewing body (2) as a function of a detected light color of a screen display at the edge of the screen display and / or to increase or decrease the light intensity provided by the lamp assembly (6) as a function of the detected brightness of the screen display of the monitor (11). Lighting device according to one of the preceding claims, wherein the control device (16) is designed to vary the brightness and / or light color of the screen display of a monitor (11) located on the work table (3) as a function of the light emitted by the light assembly (6) . Lighting device according to one of the preceding claims, wherein a detection device (17) is provided for detecting the presence and / or identity of a user (5) at the work table (3) and the control device (16) is designed to detect the presence of a user ( 5) to dim down and / or switch off the lighting assembly (6) and / or to dim it up and / or to switch it on when the presence of a user (5) is detected, and / or calls up a stored lighting profile as a function of the detected identity of a user (5). Lighting device according to one of the preceding claims, wherein a detection device (17) is provided for detecting the local brightnesses on different sides of the work table (3) and the control device (16) is designed to illuminate the work table (3) differently zone by zone depending on the detected local brightnesses, in particular such that a table zone facing a light area is illuminated more brightly than a table zone adjacent to a dark area. Lighting device according to one of the preceding claims, wherein a detection device (17) for detecting ambient parameters such as ambient temperature and / or CO2 content and / or O2 content is provided and the control device (16) is designed to control the light assembly (6) as a function of the detected environmental parameter to be controlled variably.

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