LIGHT FIXTURE FEATURING A ROD-SHAPED LIGHT GUIDE AND A TUBULAR LIGHT GUIDE SURROUNDING IT

Abstract

LUMINAIRE FEATURING A ROD-SHAPED LIGHT GUIDE AND A TUBULAR LIGHT GUIDE SURROUNDING THE LATTER Luminaire (1) comprising a first light guide (1) extending between a first and a second end side (10, 11) and surrounding an interior space (I), a second light guide (2) extending between a first and a second end side of rod (20, 21) in the interior space (I), first and second luminescent means (3, 4) for injecting light into the first and second light guides (1, 2);said second light guide (2) having a light mixing channel (22) for mixing the light injected by its first end side of the stem (20), and having, downstream of the light mixing channel (22), an ejection section (23) for ejecting towards the interior space (I) at least a portion of the light injected into the second light guide (2), so that the ejected light exits laterally from the luminaire (L) through the first light guide (1). Figure for the abbreviation: Fig. 1.;

Description

Description Title of the invention: LUMINAIRE FEATURING A ROD-SHAPED LIGHT GUIDE AND A LIGHT GUIDE TUBULAR SURROUNDING THE LATTER technical field

[0001] = The present invention relates to a luminaire equipped with light guides surrounding Both of them. Previous technique

[0002] — The prior art of lamps in which the light guides is known of different shapes surround each other. Thus, a central light guide can be surrounded, on the outside, by another light guide. Light guides They both have a light injection side located on the same side. The light The introduced fluid is ejected at the opposite end. The crossbar can take any desired shape. This allows for the creation of a lamp whose the ejection of light from one end side is of a very precise shape. Description of the invention

[0003] — The present invention therefore aims to provide a luminaire of the type mentioned in the introduction, equipped with an extended light emission function.

[0004] According to a first aspect, the present invention relates to a luminaire having a first tubular light guide that extends from a first end side up to a second end side along a first direction of extension and which surrounds an interior space, a second, rod-shaped light guide that extends from one end of the stem to the other end of the stem stem along a second direction of extension in the interior space, of the first luminescent means for injecting light into the first light guide by its first end side, of the second luminescent means intended to inject light into the second light guide from its first side stem end; said second light guide presenting, from its first end side of stem, in the second direction of extension, a path of light mixture intended to mix at least partially the light injected by its first end end of the stem, and said second light guide presenting, in downstream of the light mixing path, viewed along the second extension direction, a ejection section designed to eject at least part of the light injected into the second light guide, in such a way that the light thus ejected laterally from the luminaire by the first light guide.

[0005] — Thanks to the presence of a defined ejection section of the second light guide, the Light injected into the second light guide emerges either concentrated or entirely laterally. This lateral ejection of light from the first light guide produces a specific lighting effect, ideally creating an impression of almost floating or a spot of light passing through the first tubular light guide. Depending on the design of the ejection section, any required lighting effect can be created, thus expanding the optical functionality of the luminaire in numerous ways. The second light guide may also feature several ejection sections, preferably viewed in the second extension direction. These may be evenly or irregularly distributed along the second extension direction. Furthermore, they may be of identical design or at least partially different. The ejection section in the second light guide can be defined by a geometric shape. Thus, through its manufacturing or machining, the second light guide allows for the easy creation of the appropriate ejection section. Furthermore, this geometric shape allows for manipulation of the appearance of the light effect perceived through the first tubular light guide. The light distribution is therefore primarily determined by the geometry of the ejection section. The geometric shape may exhibit a form that, at least partially, narrows as it moves away from the first end of the rod, and / or the geometric shape may extend at least partially obliquely relative to the second extension direction. More specifically, the cross-sectional area of ​​the ejection section may, for example, decrease at least partially as it moves away from the first end of the rod. It is also conceivable that the geometric shape may be oblique at least partially toward the second extension direction. This design allows for oblique surface sections of the second light guide, resulting in light ejection into the second light guide. The light is ejected accordingly, as these surface sections no longer cause total internal reflection to direct the light.A suitable light ejection is therefore simple to achieve. The geometric shape can preferably be conical, doubly conical, spherical, cylindrical, or any other desired shape, for example, any imaginable organic form. This allows for the creation of various lighting effects. A conical shape, for example, can simulate the glow or light of a candle. A doubly conical shape, for example, can create a reverberating candlelight effect. A spherical shape, for example, can simulate a kind of floating sphere, like a planet. By implementing other shapes, such as organic forms, it is possible to achieve a whole range of other effects. The ejection section can also, or simultaneously, be formed by an ejection structure section. In other words, the ejection section is formed by a structure or texture, for example, of the surface of the second light guide at that precise location, or is equipped with one, in order to produce the light ejection or, for example, in combination with a geometric shape, to improve the ejection (e.g., to optimize its light distribution). Implementing an ejection structure section allows, for example, for a highly homogeneous light emission within the ejection section. If necessary, a well-defined focal point of light can also be created. As previously mentioned, the geometric shape may exhibit the aforementioned ejection structure section. It is also conceivable that the ejection structure section may exhibit the aforementioned geometric shape. These two sections can thus be constructed in any complementary manner. However, they can also be independent of each other, for example, by being offset in the second extension direction. The second light guide has an outer rod surface, which outer rod surface has said ejection structure section. This structure can thus be simply provided on the rod surface, in the appropriate section, for example independently of any other geometric shape and therefore in the absence of any other geometric shape, to produce said light ejection in the corresponding ejection section. The ejection-structured section can be created by applying a defined or random texture to the corresponding section of the second light guide or its outer stem surface. This could be, for example, a microstructure or an engraving on the second light guide. This can preferably be produced, for example, using a laser process. Other texturing methods for the ejection-structured section are also possible. The ejection section can have, according to the second direction of extension, a height H located in a ratio, with respect to a length L2 of the second light guide according to the second direction of extension, of 2 < L2 / H < 20, preferably 5 < L2 / H < 15, more preferably 6 < L2 / H < 12 and most preferably 8 < L2 / H < 10. This makes it possible to obtain a particular lighting effect, in various ways and with different dimensions, for example a floating lighting effect, thanks to the ejection section. The first light guide can have a length L1, along the first direction of extension, of 50 mm < L1 < 400 mm, preferably 100 mm < L1 < 300 mm, and preferably 150 mm < LI < 250 mm. This allows the luminaire to have a practical shape. The luminaire can thus, by for example, being the size of a flashlight or a candle. The second light guide can have a length L2, depending on the second extension direction, of 50 mm < L2 < 400 mm, preferably 100 mm < L2 < 300 mm and preferably 150 mm < L2 < 250 mm. The second light guide thus allows for the production of a reasonably practical format. It is preferable that the length LI of the first light guide corresponds approximately to the length L2 of the second light guide. This makes them easy to position and install within the luminaire frame. The ejection section may also have a height H, along the second direction of extension, of 5 mm < H < 200 mm, preferably 8 mm < H < 100 mm, preferably 10 mm < H < 50 mm, and particularly 15 mm < H < 25 mm. This allows for a precise "object size" to be achieved for the desired lighting effect. This precise height corresponds, for example, to that of a candle flame. The light-mixing path may extend, from the first end of the rod, viewed in the second direction of extension, to a length preferably up to 1 / 50, 1 / 25, 1 / 20, 1 / 15, 1 / 10, 1 / 6, 1 / 5, 1 / 4, 1 / 3, 1 / 2, 2 / 3, or 3 / 4 of the second light guide. The light-mixing path is preferably chosen to produce a completely homogeneous mixture of the injected light. The second light guide preferably has, viewed in the second direction of extension, a substantially rounded cross-section, preferably circular or oval, or a polygonal cross-section, e.g., preferably triangular or quadrilateral, such as a rectangular or square cross-section. The shape of the cross-section of the second light guide defines both the overall lighting effect in the ejection section and the light guidance within the second light guide. A circular cross-section is particularly preferred for this purpose, ensuring uniform guidance of the light injected into the second light guide by means of total internal reflection, at least as far as the ejection section. Due to the tubular shape of the first light guide, the first end side and / or the second end side preferably extend along an annular track, preferably a circular one. The second light guide is preferably substantially cylindrical, its shape then being substantially that of a solid cylinder. The second light guide thus constitutes a cylindrical light guide rod which preferably extends from the center of the first hollow cylindrical light guide and more preferably in the same direction. The second light guide can preferably be seen in the second In the direction of extension, a cross-sectional area Q of approximately 10 mm²? < Q < 180 mm², preferably 50 mm²? < Q < 115 mm², with Q = 80 mm² being the most preferably? The second light guide preferably has, particularly in the case of a rounded or circular cross-section, a diameter D of 4 mm < D < 15 mm, preferably 8 mm < D < 12 mm, with D = 10 mm being the most preferably. It is thus possible, on the one hand, to obtain effective light guidance and, on the other hand, to ensure, if necessary, a desired dimension of the ejection section and, for example, also its dimensions, particularly when this ejection section is provided by a geometric shape. The first light guide, viewed in the first direction of extension, may have a substantially rounded cross-section, e.g., preferably circular / annular or oval, or a polygonal cross-section, e.g., preferably triangular or quadrilateral, such as a rectangular or square cross-section. The luminaire may thus preferably take on a very specific shape (e.g., external), depending on the requirements. Furthermore, this shape can also be used to determine the lighting effect. The first light guide is preferably of a hollow cylindrical design, thus essentially resembling a hollow cylinder. In this way, the first light guide forms a kind of cylindrical envelope around the second light guide. This envelope is particularly practical and can, for example, simulate the typical shape of a candle. The first light guide has several adjacent wall sections, preferably viewed circumferentially around the first extension direction or a longitudinal axis of the luminaire, and / or viewed along the first extension direction or the longitudinal axis of the luminaire. These wall sections can preferably each extend flat in a plane. Thus, for example, a first light guide can have a cross-section with n corners, viewed in the first extension direction or along the longitudinal axis of the luminaire, where n corresponds to the number of wall sections. However, it is also possible for the wall sections to have a curvature, for example, protruding from the interior space (convex) and / or inward (concave). The wall sections can also have another shape.Curved, flat, or other shaped wall sections can be combined in any way to form the first light guide. This consequently determines the external shape of the luminaire, which is preferably defined by the first light guide, serving as the external element on all or at least the vast majority of its sides. The first light guide is preferably at least partially, if not completely, translucent, transparent, or partially transparent. More specifically, When transparent in design, the first tubular light guide can, for example, produce a precise emission of light from its second end, thus creating a corresponding lighting effect. When partially transparent or translucent in design, the first tubular light guide can, for example, be optically represented as a curtain of light in which the lighting effect produced by the ejection section is visibly visible, such as a floating light spot. Thus, the lighting effect produced by the second light guide can, for example, give a visual impression of veiled light, allowing the simulation of a real lighting situation, such as candlelight. The first light guide preferably has an ejection structure designed to eject at least some of the light injected into the first light guide. In this case, the ejection structure can preferably extend substantially over the entire length LI of the first light guide, that is to say, it is preferably provided over substantially its entire surface area. The first light guide preferably has an inner and outer envelope surface. At least one of the inner and outer envelope surfaces (i.e., the inner envelope surface, the outer envelope surface, or both) may have at least a partial ejection structure designed to eject at least some of the light injected into the first light guide. This makes it possible to produce the effect of a light curtain or any other lighting effect of the first tubular light guide or its envelope. Furthermore, the incorporation of an ejection structure makes it particularly easy to achieve these effects. The ejection structure can, for example, have a surface structure such as a microstructure. This is simple to implement. It allows for a particularly light and delicate texturing to create a preferably uniform luminosity of the first light guide or light curtain without itself being visible. Similarly, the ejection structure can, for example, feature a surface print. This is preferably applied to a smooth surface of the first light guide, ideally its inner and / or outer envelope surface. This allows for simple and varied implementation of the ejection structure. Furthermore, the ejection structure can, for example, be formed from the material of the first light guide. This material should preferably be a volumetric light-diffusing material. To this end, the first light guide can be made entirely of the corresponding material, or only in the required sections. The ejection structure is thus easy to produce, directly during the manufacturing of the first light guide. The ejection structure (preferably the surface structure, such as the microstructure) can ideally exhibit a density pattern. This density pattern preferably has a structural density ranging from 50 ppi (dots per inch) to 100 ppi, and is preferably 70 ppi. A precise density pattern, or its precise structural density, allows for optimized lighting effects. For example, when simulating a candlelight glow created by the second light guide or its ejection section, it is desirable that this "candlelight glow" not be overly veiled by an excessively high structural density of the ejection structure, and that the efficiency not be degraded by an excessively low structural density of the ejection structure. The ejection structure (e.g., the surface structure, such as the microstructure) can be produced in the first light guide, preferably in the inner and / or outer envelope surface, preferably using a laser process. This allows for the creation of a fine and precise structure. This structure is preferably designed to be dense but not deep, so as to produce uniform luminosity of the curtain or the first light guide without itself being visible. The ejection structure (e.g., the surface structure, such as the microstructure) can also be produced within the first light guide, preferably within the inner and / or outer envelope surface, preferably using a stamping process. This can be done, for example, directly during the manufacturing of the first light guide. Thus, the ejection structure can be integrated into the first light guide using simple means and preferably during the manufacturing process of said first light guide. The ejection structure can become denser as it extends from the first end of the first light guide. This makes it possible to produce a preferably uniform lighting effect, preferably along the entire height of the ejection structure and more preferably along the entire height of the first light guide, particularly when light is injected unilaterally into the first light guide, from its first end. A homogeneous curtain of light can thus be optically represented. This densification can also be achieved in any way that produces a well-defined intensity pattern along the first light guide (preferably in the first direction of extension) or for other desired optical effects. For example, the ejection structure can have a constant density along the first light guide (in its first direction of extension). In a preferred form of realization, the first direction of extension and the The second extension direction is parallel to each other, resulting in a harmonious luminaire design. This preferably results in a well-defined, constant spacing or a consistent configuration between the light guides, leading to a harmonious appearance of the ejection section. The first and / or second extension directions are preferably straight and, ideally, parallel to a longitudinal axis of the luminaire. This allows for a particularly simple and harmonious shape. For example, a candle can be simulated with remarkable realism. In a particularly preferred embodiment, the first and second light guides are coaxial, sharing a common extension axis. This extension axis is preferably parallel or coaxial to the longitudinal axis of the luminaire. This results in a more uniform, harmonious, and simpler overall luminaire construction. The luminaire may preferably also include a translucent housing element. This housing element may at least partially enclose the first light guide around its outer circumference. The housing element preferably encloses the circumference of the first light guide and, more preferably, completely surrounds it. Alternatively, or in addition, the housing element may be positioned within the space between the first and second light guides. The housing element may at least partially, and preferably completely, enclose the outer circumference of the second light guide. This housing element allows, among other things, the protection of the light guides, particularly the first light guide, from external influences, including mechanical influences.Alternatively or in addition, it is conceivable that this housing element could have other optical functions serving to enhance the lighting effect of the luminaire. The luminaire preferably also includes a housing for the end section of the first light guide at its first end end and / or a second housing section of the second light guide at its first stem end. The housing thus provides a simple solution for partial housing and support of the light guides. This solution preferably occupies only a small area, namely on the end and stem ends of the respective light guides. This allows for secure support of the corresponding light guide while leaving a large portion available for optical display, particularly for the purpose of the previously described lighting effect. The first housing section that fits inside the casing does not preferably There is no ejection structure. This prevents light from being ejected near the housing, increasing the efficiency of the first light guide. Furthermore, this first housing section can serve as an additional light mixing channel, so that, for all practical purposes, at least partial (and preferably homogeneous) light mixing can occur within the first light guide before the light exits through the second end face and / or the ejection structure of the first light guide. This allows for an overall homogeneous lighting effect. The first housing section can extend from the first end face to, for example, 1 / 50th and up to 1 / 20th of the length LI of the first light guide, although this is not a limitation within the scope of the invention. The second housing section within the casing may preferably incorporate at least a portion of the light-mixing path. In this way, the second housing section within the casing can be used effectively to mix the light, thereby contributing to overall efficient light direction. The second housing section may extend, from the first end of the rod, for 1 / 50 and up to 1 / 20 of the length L2 of the second light guide, for example, although this is not a limitation within the scope of the invention. The housing also ideally accommodates the first and / or second luminescent elements. This allows the luminaire components to be implemented in a particularly compact manner within a single housing. Since light generation and its injection into the light guides occur within the housing, the luminaire's exterior can offer an overall aesthetically pleasing appearance. This also reduces the number of components required. Furthermore, sensitive parts such as the luminescent elements can be protected from contact. The luminaire may also include a cover element for attaching the first light guide to the second light guide, preferably by their second end and second stem end. This allows for easy attachment of the light guides, preferably at their distal ends, and preferably in a relative position to each other. This further enhances the stability of the luminaire. The cover element may preferably close the internal space at the distal end of the luminaire, preferably in a watertight manner, for example, according to a class IP54 or higher. The cover element can preferably be connected to the housing, preferably by means of fixings that pass at least partially through the internal space. This allows at least the first light guide and / or the A second light guide is positioned between the cover element and the housing. The housing element, if present, can also be fixed in the same way between the cover element and the housing. This creates a luminaire that is easy to assemble and particularly stable overall. The luminaire may also have a first reflective section, preferably located on the second end side of the first light guide. This allows the light injected into the first light guide (particularly through its first end side) to be reflected back towards the first end side of the first light guide, further increasing the luminaire's efficiency and reducing, or even eliminating, light scattering losses. The luminaire may preferably have a second reflective section on the second end end of the stem of the second light guide. Thus, the light injected into the second light guide (preferably through its first end end) can be reflected back towards the first end end of the stem of the second light guide, further increasing the luminaire's efficiency and reducing, or even eliminating, light scattering losses. The first and / or second reflective section can be mounted on a support. In this case, the cover element may preferably incorporate, or even constitute, the support(s). The supports are preferably designed as a single unit. This greatly facilitates the installation of the reflective section(s). This integration into the cover element allows for the performance of multiple functions with a small number of components. It is also preferable to provide additional luminescent means for injecting light into the first light guide from its second end. These function in the same way as the first luminescent means, but from the opposite end. It is also possible to provide additional luminescent means for injecting light into the second light guide from its second end. These function in the same way as the second luminescent means, but from the opposite end. The third and fourth luminescent means can then preferably be supported by or housed within the support. The first and second luminescent means can preferably be implemented on a common printed circuit board. This further reduces the number of components. Generally speaking, however, it is also conceivable that these luminescent means be implemented on any other board. the number of printed circuit boards. Similarly, the third and fourth luminescent means, if present, can be provided on one or more printed circuit boards. In a preferred embodiment, the first and second luminescent means are independently controllable. This allows, for example, the lighting effect to be produced by the ejection section or by the first light guide (e.g., by its second end face or by the ejection structure, for example, in the form of a light curtain), or to produce a combined effect combining these two lighting effects. Different modes can thus be provided, for example, allowing control of either the first light guide only, the second light guide only, or both light guides. The second light guide can, for example, produce the effect of a candle described earlier, intended, for example, for use in churches. The first light guide can then, if desired, produce a light curtain creating a kind of mystical candle effect.Controlling the first light guide alone can, for example, be used to communicate information or to trace a path. Similarly, when present, the third and fourth luminescent means can also be controlled independently. This control can also preferably be done independently of the first and second luminescent means. However, it is still possible to control the first and third luminescent means together, and the second and fourth luminescent means together, at least according to specific control modes. The luminescent means (i.e., the first and / or second and, if present, also the third and / or fourth luminescent means) may preferably include at least one or more LEDs or groups of LEDs. These preferably include RGB LEDs and / or RGBW LEDs and / or adjustable white LEDs. This allows any desired color accent to be created using the first and / or second light guide. In a particularly preferred embodiment, the luminescent means (i.e., the first and / or second and, if present, also the third and / or fourth luminescent means) can be individually controllable to emit light of different colors. This is achieved particularly easily through the use of LEDs of various colors, for example, with an LED group. The lighting effect of the first light guide, as well as the second light guide, can thus be produced, preferably with changing colors. This allows for particularly easy switching between different modes, for example, a tourist reception mode and a religious mode. Furthermore, the chosen color can accompany religious ceremonies, for example, in a church (e.g., using liturgical colors). The liturgical color can then be implemented, for example, by means of the first light guide, which emits a delicate curtain of light. The second light guide can then receive, for example, a warm white light intended to simulate, for example, the glow of a candle via the ejection section. In tourist reception mode, the control can, for example, use only the first light guide. By emitting a green curtain of light from the first light guide, one can thus signify, for example, permission to enter a building (e.g., a church). Similarly, the emission of a red curtain of light under the control of the first light guide can, for example, signify that entry to the building is prohibited. The colored representations and various lighting effects are not subject to any limitations by virtue of the present invention. The first luminescent means are preferably arranged on an annular track, e.g., preferably a circular track, corresponding to the first end face. The first luminescent means are then most preferably arranged on the annular or circular track, distributed therein uniformly and / or according to cyclic symmetry. This results in a uniform and preferably homogeneous injection of light into the first light guide. The second set of luminescent elements is preferably arranged on a central point defined by all the first set of luminescent elements, or even on or around a longitudinal axis of the luminaire. This allows for the implementation of a luminaire with a harmonious or even symmetrical design. The first and / or second light guide can be made of PMMA (polymethyl methacrylate), PC (polycarbonate), silicone, glass, or any other optically comparable material. A suitable and advantageous material should be chosen based on the application requirements. For example, the first light guide can be made from a folded light guide plate (e.g., made of PMMA). The first and second light guides can be implemented separately, that is, as distinct components. This allows for the individual definition and design of the light guides according to their intended purpose. However, it is also possible for the first and second light guides to be designed together as a single unit. This further simplifies the handling and manufacturing of the light guides. The luminaire may also include a power source, such as a rechargeable battery, allowing for autonomous operation. If present, the power source is preferably housed within the luminaire's casing. Generally, it is also possible for the luminaire to be powered by a... An external power source, for example via a power plug through a socket. It is also possible for the luminaire to have a coupling socket (e.g., connector) through which the luminaire can be connected to any corresponding connector (e.g., power plug) of a power source / current source to operate it and / or through which the power source (battery) can be recharged by connecting to any suitable current source. The luminaire may also include a control unit for operating the lighting elements, preferably via control signals received wirelessly or via a wired connection. The control unit itself, if present, may then be housed, preferably at least partially, within the casing. Brief description of the drawings The invention and its advantages will be better understood upon reading the detailed description below of various embodiments of the invention, given by way of non-limiting examples. This description refers to the accompanying figure pages, on which: [Fig.1] Fig.1 is a perspective view of a luminaire according to the invention, in accordance with a first embodiment of the present invention. [Fig.2] Fig.2 is a perspective view of a luminaire according to the invention in accordance with a second embodiment of the present invention, with representation of a light emission, [Fig.3] The [Fig.3] is a top view of a printed circuit board of a luminaire according to the invention comprising first and second luminescent means. Description of the implementation methods The figures illustrate various examples of the realization of a luminaire L according to the invention as well as its components. The luminaire L has a first tubular light guide 1 which extends from a first end side 10 to a second end side 11 along a first extension direction El and which surrounds an interior space I. Due to the tubular shape of the first light guide 1, the end sides 10, 11 each preferably extend along an annular track, as can be seen from [Fig.1]. The first light guide 1 may have a length LI, according to the first extension direction El, of 50 mm < LI < 400 mm, preferably 100 mm < L1 < 300 mm and most preferably 150 mm < LI < 250 mm. As can be seen particularly in [Fig. 1], the first extension direction El is preferably rectilinear and here most preferably parallel to a longitudinal axis X of the luminaire L. In general, other configurations are also conceivable for the first extension direction El, with for example a first extension direction El that is angled, wavy or otherwise. The first light guide 1 can exhibit, as is particularly evident in [Fig. 1], when viewed in the first extension direction El, a significantly rounded cross-section, such as, for example, an annular (circular) cross-section. Generally, other cross-sectional shapes are also conceivable, for example, an oval or polygonal cross-section, or a triangular or quadrilateral cross-section (e.g., rectangular or square). The shape of the cross-section therefore preferably corresponds to an annular shape, and more preferably a circular annular shape. In the embodiment shown here, the first light guide 1 is essentially of hollow cylindrical design. The annular track on the first end side 10 and that on the second end side 11 follow a circular path due to the circular annular shape of the cross-section. Generally, the first light guide 1 can also have another shape. Thus, the first light guide 1 can have several adjacent wall sections, viewed, for example, on its circumference around the first extension direction El or the longitudinal axis X of the luminaire L and / or along the first extension direction El or the longitudinal axis X of the luminaire L. These wall sections can preferably each extend levelly in a plane or be arched (preferably extending away from the interior space I and / or into it) or be of any other shape.A combination of different wall section shapes can also be considered. The shape of the first light guide 1 is thus, for example, a (predominant) factor in the desired external shape of the luminaire L. As can be seen particularly in Figures 1 and 2, the luminaire L also has a second rod-shaped light guide 2. This extends from a first end side of the rod 20 to a second end side of the rod 21 along a second extension direction E2 in the interior space I. As can be seen particularly from [Fig.1], the second extension direction E2 is here also straight and preferably parallel to the longitudinal axis X of the luminaire L. In general, other configurations are also conceivable for the second extension direction E2, with for example a second extension direction E2 that is angled, arched, wavy or otherwise. In the preferred embodiment shown here, the first extension direction El and the second extension direction E2 are parallel. Furthermore, as shown in the embodiment examples, the first light guide 1 and the second light guide 2 can be coaxial, presenting a common extension axis EX, which is also coaxial to the longitudinal axis X of the luminaire L in the present case. The second light guide 2 preferably has a length L2, along the second extension direction E2, of 50 mm < L2 < 400 mm, preferably 100 mm < L2 < 300 mm, and most preferably 150 mm < L2 < 250 mm. The length L2 of the second light guide 2 preferably corresponds to the length L1 of the first light guide 1, as illustrated by way of example in Figures 1 and 5. The second light guide 2, as can be seen particularly in Figures 1 and 2, when viewed in the second extension direction E2, has a substantially rounded cross-section, preferably a circular cross-section in this case. The second light guide 2 here has the form of a cylindrical rod used to guide the light. However, it is also possible for the second light guide 2 to have a different cross-sectional shape, for example oval or even a polygonal cross-section, such as triangular, rectangular, or square. The second light guide 2 preferably has, viewed in the second extension direction E2, a cross-sectional area Q of approximately 10 mm² < Q < 180 mm², preferably 50 mm² < Q < 115 mm², with most preferably Q = 80 mm². In the case of a rounded or even circular cross-section, the second light guide 2 may preferably have a diameter D of 4 mm < D < 15 mm, preferably 8 mm < D < 12 mm, with most preferably D = 10 mm. The dimension of the diameter D, the cross-sectional area Q, or the shape of the cross-section of the second light guide 2 is preferably constant in its extension direction E2; however, it may vary, provided that it does not interfere with the functions of a light guide in the desired or required areas. The first light guide 1 and the second light guide 2 can be made of the same material or of different materials. Preferred materials include, for example, PMMA, PC, silicone, or glass. The first light guide 1 and the second light guide 2 can preferably be implemented as separate elements. The first light guide 1 can, for example, be made from a folded light guide plate (e.g., made of PMMA). In a preferred embodiment, it is also possible for the first light guide 1 and the second light guide 2 to be implemented as a single, integrated assembly. The L luminaire also features initial luminescent means 3 intended to injecting light into the first light guide 1 through its first end side 10. In addition, the luminaire L has second luminescent means 4 for injecting light into the second light guide 2 through its first end side of the stem 20. As can be seen particularly in [Fig. 3], the first luminescent means 3 and the second luminescent means 4 can be provided on a common printed circuit board 5. Generally, however, it is also conceivable that the first luminescent means 3 and the second luminescent means 4 could be implemented on separate printed circuit boards. Other embodiments are also possible, according to which various types and numbers of luminescent means 3 and 4 can be provided on various types and numbers of printed circuit boards 5. As can be seen in [Fig. 3], in the top view of the printed circuit board 5, its shape corresponds substantially to that of the luminaire L (i.e., that of the first light guide 1), preferably because the first light guide 1 defines the external dimensions of the luminaire L. Therefore, in accordance with the representative examples shown, the printed circuit board 5 is designed to be circular in top view. The first luminescent means 3 and the second luminescent means 4 are then arranged accordingly on the printed circuit board 5 in such a way that, together with the first light guide 1 and the second light guide 2, they allow their light to be injected into a corresponding side of the light guide 1, 2 (i.e., through the first end side 10 or the first end side of the stem 20). The first luminescent means 3 and the second luminescent means 4 preferably have at least one or, as illustrated by way of example, several LEDs 30, 40. The luminescent means 3, 4 may have, as in the case for example of [Fig. 3] concerning the second luminescent means 4, groups of LEDs 41. The luminescent means 3, 4, their LEDs 30, 40 or groups of LEDs 41 may preferably contain RGB LEDs and / or RGBW LEDs and / or adjustable white LEDs. The first luminescent means 3 can preferably be controlled to emit light of different colors. Similarly, the second luminescent means 4 can also be controlled to emit light of different colors. It is generally preferable that the first luminescent means 3 and the second luminescent means 4 be independently controllable, so that light can be injected selectively only into the first light guide 1 by means of the first luminescent means 3, or only in the second light guide 2 by means of the second luminescent means 4, or that light can be injected both into the first light guide 1 by means of the first luminescent means 3 and into the second light guide 2 by means of the second luminescent means 4. This may occur in identical or preferably different colors and, if desired, in changing or changeable colors. As can be seen particularly in [Fig. 3], the first luminescent means 3 can be arranged on an annular track C corresponding to the first end face 10, here preferably a circular track. It is even more preferable that the first luminescent means 3 be arranged uniformly along the annular track C. In the embodiment shown here, the first luminescent means 3 are distributed according to a cyclic symmetry along the annular track C. Similarly, it is clear from [Fig. 3] that the second luminescent means 4 are arranged on a central point M defined by the entirety of the first luminescent means 3. The second luminescent means 4 can also be arranged near the longitudinal axis X of the luminaire L. In the embodiment shown, the central point M is located on the longitudinal axis X of the luminaire L. The second light guide 2 has, starting from its first end side of rod 20, in the second extension direction E2, a light mixing path 22 intended to mix at least partially, and preferably completely, the light injected by its first end side of rod 20. The light mixing path 22 can extend, from the first end side of rod 20, seen in the second extension direction E2, over a length preferably up to 1 / 50 or 1 / 25 or 1 / 20 or 1 / 15 or 1 / 10 or 1 / 6 or 1 / 5 or 1 / 4 or 1 / 3 or 1 / 2 or 2 / 3 or 3 / 4 of the second light guide 2, or of the length L2 of the second light guide 2. The second light guide 2 further presents, downstream of the light mixing path 22, viewed along the second extension direction E2, an ejection section 23 intended to eject towards the interior space I at least a part of the light injected into the second light guide 2, in such a way that the light thus ejected exits laterally from the luminaire L, i.e. here transversely to the longitudinal axis X of the luminaire L or to the first extension direction El, through the first light guide 1. This is shown, by way of example, in the embodiment of [Fig.2], in which the ejection section 23 is visible as a spot of light. It is preferable that the light mixing path 22 be designed so that the injected light undergoes completely homogeneous mixing before reaching the ejection section 23. The light guiding function of the second light guide 2 should thus consist, at least between the first end side of the rod 20 and the ejection section 23, in that at least part of the light injected by the first end side of the rod 20 can exit at the level of the ejection section 23 to be introduced laterally into the interior space I; but the light guiding function can also be more extensive (i.e. go beyond the ejection section 23), seen in the second extension direction E2, as shown for example in [Fig.1]. The ejection section 23 preferably has, along the second extension direction E2, a height H located in a ratio, with respect to the length L2 of the second light guide 2 along the second extension direction E2, of 2 < L2 / H < 20, preferably 5 < L2 / H < 15, more preferably 6 < L2 / H < 12 and most preferably 8 < L2 / H < 10. The ejection section 23 preferably has a height H, along the second extension direction E2, of 5 mm < H < 200 mm, preferably 8mm <H < 100 mm, plus préférablement 10 mm < H < 50 mmet tout particu- lièrement 15 mm < H < 25 mm. The ejection section can preferably be arranged, with regard to its length L2 in the direction of the extension of the second light guide, at the center thereof. It is preferable that the ejection section(s) be located within four-fifths (4 / 5), three-quarters (3 / 4), three-fifths (3 / 5), or two-thirds (2 / 3) of the second light guide furthest from the first end of the stem, or within one-half (1 / 2) of said second light guide furthest from said end. It is further preferable that the ejection section(s) be located within a range of 2*L2 / 5, L2 / 3, or L2 / 4 around the center of the second light guide, viewed in the second extension direction. However, the invention is not limited to this configuration. As can be seen particularly in Figures 1 and 2, the ejection section 23 can be formed in the second light guide 2 by a geometric shape 24. In this context, the geometric shape 24 can, as can be seen in Figures 1 and 2, be conical. This type of shape is particularly preferred because it closely resembles the shape of a candle flame, as can be seen particularly in [Fig. 2]. Generally speaking, however, any other possible geometric shape can be considered, for example, depending on the requirements and intended use, such as a doubly conical shape, a spherical shape, or an organic shape and similar forms. The geometric shape 24 preferably presents, as can be seen for example from figures 1 and 2, a shape which narrows, at least partially and in the present case over the entire height H, as it moves away from the first end side of rod 20. Thanks to this tapering shape, the light propagating through the second light guide 2 to the ejection section 23 (here by means of total internal reflection) can be ejected laterally from the second light guide 2, through this same ejection section 23, to enter the interior space I in a well-defined manner, and thus exit laterally from the luminaire L through the first light guide 1, as is particularly visible in the representation in [Fig. 2]. It is therefore particularly preferable that the geometric shape 24 be at least partially oblique to the second extension direction E2, to allow even such a well-defined ejection. It is particularly preferable that the second light guide 2 and its ejection section 23 be designed to be rotationally symmetrical. Generally, other embodiments are possible, for example, as long as the light ejection does not need to occur around the entire circumference of the second light guide 2 or as long as an asymmetrical light output is desired. Alternatively, or as a complementary measure as shown in the illustrated embodiments, the ejection section 23 can also be formed by an ejection structure section 25. In this case, as illustrated in the embodiments shown, an outer stem surface 26 of the second light guide 2 can have said ejection structure section 25. In the embodiment shown therein, it is the geometric shape 24 that has this ejection structure section 25. Alternatively, it could also be considered that the ejection structure section 25 has the geometric shape 24. The first light guide | is preferably at least partly translucent, partly transparent, or equally transparent. As can be seen particularly in [Fig.1], the first light guide 1 preferably has an ejection structure 13 for ejecting at least part of the light injected into the first light guide 1. The first light guide 1 preferably has an inner envelope surface 17 and an outer envelope surface 16. At least the inner envelope surface 17 and / or the outer envelope surface 16 preferably have at least part of the ejection structure 13. This ejection structure 13 is, for example, visible through the light curtain appearing in [Fig.2]. The ejection structure 13 preferably has a surface structure 15, for example a microstructure. The ejection structure 13 can be produced in the first light guide 1, here preferably in the inner or outer envelope surface 17, 16, preferably by means of a laser and / or impact process. The ejection structure 13 may also have a surface imprint. Similarly, the ejection structure 13 can be formed from the material of the first light guide. 1, preferably consisting of a volume-diffusing light-diffusing material. This material is then preferably provided in the desired sections of the first light guide 1. The ejection structure 13, preferably the surface structure 15 such as the microstructure, may have a density pattern designed to produce specific lighting effects. The density pattern may have a structural density ranging from 50 ppi (dots per inch) to 100 ppi, and is preferably 70 ppi. The ejection structure 13 may have a constant density in the first extension direction El. To achieve the most homogeneous light emission possible, as illustrated for example in [Fig. 2], the ejection structure 13 may become denser as it moves away from the first end side 10 of the first light guide 1 (i.e., from the first end side 10 towards the second end side 11).This densification or density pattern can also be designed or provided in any way to produce a well-defined intensity configuration along the first light guide 1 (preferably in the first extension direction El) or around the perimeter of the first light guide 1, or for other desired optical effects. The luminaire L may also feature a translucent housing element. This element may surround the outer circumference of the first light guide 1 at least partially, or even completely. Alternatively, or in addition, the translucent housing element may be arranged within the space between the first light guide 1 and the second light guide 2, forming a closed enclosure around its entire circumference. The housing element used in this way may be a separate component. The housing element can then preferably be made removable, allowing the luminaire L to be customized with a housing element of choice, or it is possible to use various housing elements that can be changed as needed and desired to create different lighting effects. Alternatively, the translucent housing element can also be made as a single unit with one or both of the light guides 1, 2. The housing element can also preferably be made of a suitable material, such as PMMA, PC, silicone, or glass. As can be seen particularly from [Fig.1] but also from [Fig.2], the luminaire L may also have a housing 7. This serves as the end housing of a first housing section 18 of the first light guide 1 at the level of its first end side 10 and, in the present case, of a second housing section 28 of the second light guide 2 at the level of its first end side of stem 20. To create a particularly efficient L-shaped luminaire, the first section of housing 18 which is housed in the housing 7 may not have the ejection structure section 13. This section at least may then serve preferably as a light mixing path for the first light guide 1, allowing the light injected into the first light guide 1 to be mixed as homogeneously as possible, and preferably totally mixed, before being able to exit through the ejection structure 13 (or its second end side 11). Similarly, the second housing section 28 which is housed in the casing 7 may have at least part of the light mixing path 22. The light mixing path 22 then preferably extends further, at least in part to the ejection section 23. The housing 7 also allows, as can be seen for example from [Fig.1], the first luminescent means 1 to be carried and even housed, as well as, in this particular case, the second luminescent means 2. As can be seen from [Fig.1], the luminaire L may also have a cover element 8 for fixing the first light guide ! to the second light guide 2, preferably by their second end side 11 and second end side of stem 21, as illustrated. The cover element 8 is preferably connected to the housing 7, ideally by means of fasteners (not shown here) that pass at least partially through the internal space I. This allows at least the first light guide 1 and the second light guide 2, and, if present, the housing element itself, to be fixed between the cover element 8 and the housing 7, thus creating a generally stable and easy-to-install luminaire L. The cover element 8 can preferably close off the internal space I on the cover side, preferably in a watertight manner, for example, according to class IP54. The luminaire L may also have a first reflective section. This is preferably provided on the second end side 11 of the first light guide 1, to retransmit the light injected into the first light guide 1 (i.e., the light from the first luminescent means 3 injected through the first end side 10) towards the first end side 10 of the first light guide 1, thereby increasing the efficiency of the luminaire L. The retransmitted light is ready to be re-ejected by the ejection structure 13, insofar as the latter is present. The luminaire L may further have a second reflective section. This may be provided on the second end end of the stem 21 of the second light guide 2, to reflect the light injected into the second light guide 2 (i.e., the light from the second luminescent means 4 injected through the first end end of the stem 20) back towards the first end end of the stem 20 of the second light guide 2. The light thus transmitted onto the ejection section 23 can then be ready to be ejected appropriately. The first reflective section and the second reflective section can be provided on a support. For this purpose, the cover element 8 can have or even constitute this support, as shown in [Fig.1]. The luminaire L may preferably also include a power source, such as a rechargeable battery, enabling autonomous operation. The power source may preferably be housed in the casing 7, if present, as illustrated by example in [Fig. 1]. Alternatively, the luminaire L may be powered by an external power source. For this purpose, the luminaire L may, for example, have a plug for connection to a wall outlet. Alternatively, the power source or the casing 7 may have a connector allowing the luminaire L to be connected to a suitable power source using a corresponding plug. This could, for example, be used to continuously power the luminaire L or to recharge its power source in the form of a rechargeable battery. The luminaire L may also have a control unit for controlling the luminescent means 3, 4 preferably by means of control signals received wirelessly or via wired connection. The control unit may thus be at least partially carried preferably by the housing 7 or, as here, housed within it, if present and as illustrated in [Fig.1]. The present invention is not limited to the embodiments described above, and its scope is covered by the subject matter of the following claims. In particular, the features described above of the various embodiments may be combined interchangeably in any way.

Claims

Demands

1. Luminaire (L), comprising: a first tubular light guide (1) which extends from a first end side (10) up to a second end side (11) according a first direction of extension (El) and which surrounds a space interior (I), a second light guide (2) in the form of a rod extending from a first end side of stem (20) to a second side stem end (21) along a second extension direction (E2) in the interior space (I), the first luminescent means (3) intended to inject light in the first light guide (1) by its first end side (10), of the second luminescent means (4) intended to inject light in the second light guide (2) by its first end side of stem (20); said second light guide (2) presenting, from its first end side of stem (20), in the second direction of extension (E2), a light mixing path (22) intended to mix at least partially the light injected by its first end side of stem (20), and said second light guide (2) presenting, downstream of the path of mixture of light (22), seen along the second extension direction (E2), an ejection section (23) intended to eject into space interior (I) at least part of the light injected into the second light guide (2), such that the light thus ejected exits the- lateral to the luminaire (L) by the first light guide (1).

2. Luminaire (L) according to claim 1, wherein the ejection section (23) is formed in the second light guide (2) by a shape geometric (24) having a shape which goes, at least partially, narrowing as it moves away from the first end of the stem (20), and / or in which the geometric shape (24) extends at least partially in oblique to the second extension direction (E2), the section ejection (23) being formed by a section with ejection structure (25), the second light guide (2) having an ex- stem surface exterior (26), said exterior stem surface (26) comprising said section with ejection structure (25).

3. Luminaire (L) according to claim 1 or 2, wherein the section ejection (23) presents, according to the second extension direction (E2), a height H located in a ratio, with respect to a length L2 of the second light guide according to the second extension direction (E2), equal to 2 < L2 / H < 20, preferably 5 < L2 / H < 15, more preferably- reasonably 6 < L2 / H < 12 and preferably 8 < L2 / H < 10, and / or in which the first light guide (1) has a length L1, according to the first direction of extension (El), worth 50 mm < LI < 400 mm, preferably 100 mm < LI < 300 mm and all preferably 150 mm < L1 < 250 mm, and / or in which the second light guide (2) has a length L2, according to the second extension direction (E2), worth 50 mm < L2 < 400 mm, preferably 100 mm < L2 < 300 mm and all preferably 150 mm < L2 < 250 mm, and / or in which the ejection section (23) presents, according to the second extension direction (E2), a height H equal to 5 mm < H < 200 mm, preferably 8 mm < H < 100 mm, more preferably 10 mm < H < 50 mm and particularly 15 mm < H < 25 mm, and / or in which the second light guide (2), according to the second extension direction (E2), presents a cross-sectional surface Q being approximately 10 mm? < Q < 180 mm7, preferably 50 mm? < Q < 115 mm, preferably with Q = 80 mm, and / or in which the second light guide (2) has a diameter D measuring 4 mm < D < 15 mm, preferably 8 mm < D < 12 mm, with preferably D = 10 mm.

4. Luminaire (L) according to any one of the preceding claims, in which the first and second light guides (1, 2) present, along the first and in the second direction of extension (El, E2) respectively, a substantially rounded cross-section, of preferably circular or oval, or a polygonal cross-section, preferably triangular, rectangular or square, and / or in which the first light guide (1) presents, according to its circumference conference around the first direction of extension (El) or an axis longitudinal (X) of the luminaire (L) and / or along the first direction extension (El) or the longitudinal axis (X) of the luminaire (L), several adjacent wall sections, each preferably extending flatly in a plane or preferably curved outwards from the space interior (I) and / or towards the interior of it.

5. Luminaire (L) according to any one of the preceding claims, in which the first light guide (1) has a structure ejection (13) intended to eject at least part of the light injected into the first light guide (1), said first light guide (1) preferably having a surface of inner and outer envelope (17, 16), at least one of the inner and outer envelope surfaces (17, 16) presenting at less partially said ejection structure (13), the structure ejection (13) becoming denser as it moves away from the first end side (10) of the first light guide (1), or the ejection structure (13) exhibiting a constant density in the first direction of extension (El).

6. Luminaire (L) according to any one of the preceding claims, further presenting a housing {7) intended for the end housing of a first housing section (18) of the first light guide (1) to level of its first end side (10) and / or a second housing section (28) of the second light guide (2) at the level of its first stem end side (20), in which the first housing section {18) which is housed in the casing (7) does not present section with ejection structure (13), and in which the second section of housing (28) which is housed in the casing (7) has at least a part of the light mixing path (22), the first means of light- necescent (3) and / or the second luminescent means (4) being further carried by the case (7) or housed within it.

7. Luminaire (L) according to claim 6, further comprising an element forming a cover (8) allowing the first light guide to be fixed (1) to the second light guide (2), preferably by their second end side (11) and second end side of stem (21), the cover element (8) being connected to the housing (7), of preferably by means of fastening means passing through at least by tially the interior space (I) allowing at least the first to be fixed light guide (1) and / or the second light guide (2) between the element forming the cover (8) and the housing (7).

8. Luminaire (L) according to claim 7, further having a first reflective section provided on the second end side (11) of the first light guide (1) to retransmit the light, injected into the first light guide (1), towards the first end side (10) of the second light guide (2), and further presenting a second reflective section planned on the second end side of stem (21) of the second light guide (2) to retransmit the light, injected into the second light guide (2), in the direction of first end side of stem (20) of the second light guide (2), the first reflective section and / or the second reflective section being provided on a support, said element forming a cover {8) presenting or preferably forming this support.

9. Luminaire (L) according to any one of the preceding claims, in which the first luminescent means (3) and the second luminescent means (4) are provided on a printed circuit board (5) common and are controllable independently of each other, the first luminescent means {3) and / or second luminescent means nescents (4) each being controllable to emit light of different- different colours, the first luminescent means (3) being arranged on an annular track (C), preferably a circular track, corresponding weight with the first end side (10), preferably on said annular track (C) by being distributed therein uniformly and / or according a cyclic symmetry, the second luminescent means (4) being arranged on a central point (M) defined by the set of the first luminescent means (3).

10. Luminaire (L) according to any one of claims 6 to 9, including further a source of energy, such as a battery or a battery, allowing autonomous operation of the luminaire (L), said energy source being preferably carried by the housing (7) or housed within it, and further comprising a control unit allowing the control of luminescent means (3, 4), preferably at means of control signals received wirelessly or via wired connection, said control unit, preferably being carried by the housing (7) or staying in it.