Light emitting device

Abstract

The invention relates to a lighting device comprising a housing, a base, a solid state light source, an exhaust pipe and a light guide provided with a light out-coupling device. A light guide is optically coupled to the solid state light source and is partially disposed within the exhaust tube. The high performance of the interaction of a laser light source (as a solid state light source) with an optical fiber (as a light guide with an exhaust pipe included in a stem) will make the lighting device more performance and improve its functionality and / or performance.

Description

Technical Field

[0001] This invention relates to the field of light-emitting devices, and more specifically, to lamps that use a housing and transmit light using optical fibers. Background Technology

[0002] Conventional light sources, such as Edison bulbs, can provide illumination for a wide range of lighting applications. However, conventional lighting sources can have drawbacks, such as high energy consumption, low performance, short lifespan, limited functionality and appearance, and a limited variety of colors and brightness. This is why the performance, functionality, and / or appearance of filament lamps have always been a topic of interest.

[0003] Optical fibers are used in a variety of applications where light is transmitted from a source to a target area. For example, in applications such as lighting, marking, and biological applications, light-diffusing fibers can be used, causing light propagating through the fiber to scatter radially outward along the fiber's length, thereby illuminating the target area along the fiber's length. However, existing light-diffusing fibers do not provide satisfactory illumination characteristics for certain applications.

[0004] Therefore, alternative light-diffusing fibers and light-emitting devices incorporating light-diffusing fibers are needed. To overcome these obstacles and challenges, new lamps with improved performance and functionality need to be developed without compromising their appearance, increasing their manufacturing complexity, and thus their cost.

[0005] The object of this invention is to provide a lighting device that does not have these disadvantages, wherein the light emitted by a solid-state light source is directly used for lighting purposes. Another advantage of this invention is the improvement in the performance, functionality, and / or appearance of filament lamps.

[0006] US2013 / 265796 discloses a lighting device and a method of manufacturing such a lighting device. The lighting device includes a first light-emitting element optically coupled to a light guide, the light guide having an outgoing surface for illumination via the light guide. Furthermore, the lighting device includes a second light-emitting element dedicated to direct illumination from the lighting device. The advantage of this invention is that the lighting device provides both decorative appearance and functional illumination, and remains energy efficient because the light emitted from the second light-emitting element is emitted directly from the light-emitting element without unnecessary energy loss. Summary of the Invention

[0007] This invention relates to an illumination device that provides light to a device, and includes at least:

[0008] -Translucent outer shell;

[0009] - A core post, at least partially disposed within a housing, at least a portion of the core post defining a first volume, while a second volume is defined between the core post and the housing;

[0010] - An optical guide having a melting temperature (Tm1) higher than the melting temperature (Tm2) of the core post, and the melting temperature (Tm1) of the optical guide being higher than the melting temperature (Tm3) of the outer shell, the optical guide being partially arranged within a first volume, partially arranged within a second volume, and partially arranged outside the first volume and the second volume.

[0011] - A solid-state light source, providing light and disposed outside the first and second volumes;

[0012] - At least a portion of the light from the light source is coupled into the light guide at a first end of the light guide portion, which is disposed outside the first volume and the second volume, and is guided by total internal reflection (TIR) ​​through the light guide to the light guide portion disposed within the first volume;

[0013] -The light guide portion arranged within the first volume includes one or more optical coupling devices configured to allow the light guide to be coupled out as coupled light into the first volume.

[0014] Subsequently, at least part of the coupled light is transmitted through the light-transmitting housing as device light.

[0015] Traditional incandescent light bulbs are typically manufactured using a core, a glass casing, and an incandescent filament for emitting light. In standard manufacturing processes, the glass components must be fused together, and the bulb must be hermetically sealed. This process requires high operating temperatures.

[0016] Manufacturing modern LED-based bulbs on existing incandescent lamp manufacturing equipment appears advantageous. However, high operating temperatures can damage the light guides used in the lighting device of this invention. This invention provides a solution to this technical problem by carefully designing a lighting device with a solid-state light source and light guide for emitting light. For this lighting device, a light guide with a melting temperature Tm1 is required, which is higher than the melting temperature Tm2 of the core and the melting temperature Tm3 of the housing.

[0017] Preferably, the first volume can be a gas that is hermetically sealed by the outer casing, and optionally includes a gas, preferably an inert gas.

[0018] The second volume may be sealed and may contain a gas, preferably an inert gas.

[0019] Preferably, the optical guide includes at least an optical fiber, which includes a core and a cladding, wherein the cladding has a lower refractive index than the core.

[0020] Preferably, the melting temperature of the core (Tm1a) and the melting temperature of the cladding (Tm1b) are higher than the melting temperature of the core post (Tm2), and optionally higher than the melting temperature of the outer shell (Tm3).

[0021] Preferably, the light guide comprises silicon dioxide, fluorine-doped glass, and / or quartz.

[0022] Preferably, the core includes an exhaust pipe defining a defined volume, wherein the light guide is partially arranged within the defined volume.

[0023] Preferably, the solid-state light source includes a laser light source.

[0024] Preferably, the emitted light is white light having a correlated color temperature range of 1500K to 6500K and a color rendering index of at least 80.

[0025] Preferably, the light source is blue light, and the light coupling device includes a light conversion material to at least partially convert the blue light source into converted light.

[0026] Preferably, the solid-state light source is arranged in the base of the lighting device; the base is configured to electrically and mechanically connect the lighting device to the luminaire socket.

[0027] Preferably, the optical coupling device includes reflective elements, scattering elements, refractive elements and / or diffractive elements arranged in or on the surface of the light guide.

[0028] Preferably, the light guide portion within the enclosed volume has a spiral or helical shape.

[0029] Preferably, the light source is emitted by a solid-state light source in a direction away from the inner surface of the housing.

[0030] The present invention also relates to lamps or luminaires that include the lighting devices described above. Attached Figure Description

[0031] This and other aspects of the invention will now be described in more detail with reference to the accompanying drawings, which illustrate preferred embodiments of the invention. The drawings are given by way of example and not limitation, in which:

[0032] Figure 1 A lighting device is schematically depicted, which includes a light guide having a coiled filament partially arranged within a core including an exhaust pipe.

[0033] Figure 2 An illumination device including a light guide and a base showing a solid-state light source is schematically depicted, the light guide having a coiled filament partially arranged within a core including an exhaust pipe;

[0034] Figure 3 A lighting device including a base with two solid-state light sources is schematically depicted, the light guide having a coiled filament partially arranged within a core including an exhaust pipe;

[0035] Figure 4 An illumination device comprising two light guides and a base showing a solid-state light source is schematically depicted, the two light guides having coiled filaments partially arranged within a core comprising two exhaust pipes;

[0036] Figure 5 An illumination device including a light guide and a base showing a solid-state light source is schematically illustrated. The light guide has a coiled filament partially disposed within a core column, which includes an exhaust pipe. A cross-section of a light-diffusing optical fiber having a core and cladding is schematically depicted.

[0037] Figure 6 An illumination device comprising two light guides and a base showing a solid-state light source is schematically depicted. The light guides have coiled filaments partially arranged within a core column, which includes an exhaust pipe.

[0038] Figure 7 A lighting device according to another embodiment shown and described herein is schematically depicted, the lighting device including a light guide having a coiled filament partially disposed within a core including an exhaust pipe;

[0039] Figure 8 A lighting device according to another embodiment shown and described herein is schematically depicted, the lighting device including a light guide having a coiled filament partially disposed within a core including an exhaust pipe;

[0040] Figure 9 A lighting device according to another embodiment shown and described herein is schematically depicted, the lighting device including a light guide having a coiled filament partially disposed within a core comprising two exhaust pipes;

[0041] Figure 10 A lighting device according to another embodiment shown and described herein is schematically depicted, the lighting device including a light guide having a coiled filament partially disposed within a core including an exhaust pipe; and

[0042] Figure 11 A lighting device including a light guide is schematically depicted, the light guide having a coiled filament partially arranged within a core column, the core column including an exhaust pipe mounted in the luminaire. Detailed Implementation

[0043] Reference will now be made in detail to various embodiments of the lighting equipment, including optical fibers arranged partially within one or more exhaust pipes as light guides, examples of which are shown in the accompanying drawings. Wherever possible, the same reference numerals are used in all the drawings to denote the same or similar parts.

[0044] Figure 1A lighting device 1 is schematically depicted, comprising a base 70 and a light guide 30, the light guide 30 including an optical fiber having a spiral shape. Furthermore, the lighting device 1 has a translucent housing 10, preferably made of glass, as is commonly seen in light bulbs. Note that the term translucent also includes transparent. The housing 10 may contain air or some other gas in a second volume 2. Preferably, at least 60% of the gas comprises an inert gas such as helium. The housing 10 can be attached to the base 70, which has a spiral or bayonet base formed on its exterior to make it compatible with replacing any light bulb.

[0045] The translucent outer shell 10 can be formed of any translucent material. For example, in some embodiments, the translucent outer shell 10 can be formed of plastic or glass. In some embodiments, the translucent outer shell can be frosted glass. The translucent outer shell 10 can be transparent or it can be colored. In some embodiments, the translucent outer shell 10 is coated with a fluorescent or scattering material. The shell 10 is light-transmitting and includes a second volume 2. Within this second volume 2, a core 20, preferably made of glass, more preferably of soda-lime glass, is placed to define a first volume 2'. An exhaust pipe 60 of a different shape, preferably made of glass, can be placed within the core 2 to accommodate a portion of the light guide 30.

[0046] By coating the inner surface 11 of the housing 10 with a luminescent material, a wider variety of colored lights can be produced even when only one solid-state light source is used.

[0047] The lighting device 1 preferably has a base 70 configured to electrically and mechanically connect the lighting device 1 to a socket 90 of the luminaire 100. The base 70 may include a cap. Most current conventional light bulbs are provided with screw bases, such as the known E5, E10, E11, E12, E14, E17, E26, E27, E29, E39, E40 bases, or automotive lamp bases, or similar bases, or bayonet bases. By providing a lighting device according to the invention with the same base type, it is compatible with existing light bulbs, thus simplifying the replacement of existing lamps with the new lighting device.

[0048] Furthermore, the base 70 of the lighting device 1 may include electronic components or electronic drive devices equipped with a power supply for driving the solid-state light source 40. These electronic drive devices or components convert the mains voltage input of the lighting device 1 into an output value suitable for driving the solid-state light source 40. Additionally, they are also provided with a control unit arranged to control the light output and / or color of the lighting device 1. This feature can also control the light intensity.

[0049] Throughout this specification, "light guide" refers to any material capable of emitting and / or diffusing light. Therefore, using optical fiber as an example does not limit the scope of the invention; other types of optical fibers or filaments can be used as light guides. According to a preferred embodiment, at least one optical fiber is used as a light guide in a lighting device.

[0050] Figure 2 The lighting device 1 is shown in view of the base 70. A light guide, or particularly an optical fiber 30, is coupled to a solid-state light source 40, such as one or more laser sources, and electronic components for converting a 230V AC or 110V AC mains voltage input into a signal suitable for driving the solid-state light source 40. In operation, the solid-state light source 40 emits light and transmits that light to the optical fiber 30.

[0051] The lighting device 1 according to the present invention can emit light through a solid-state light source 40. The solid-state light source 40 can be an LED, preferably a laser light source transmitted to the light guide 30 via optical coupling. The melting temperature (Tm1) of the light guide 30 can be higher than the melting temperature (Tm2) of the core 20 and the melting temperature (Tm3) of the outer casing 10.

[0052] This invention is based on the understanding that: by optically coupling the solid-state light source 40 to at least one end 33 or 36 of the light guide 30 ( Figure 3 Light emitted by a solid-state light source 40 disposed outside the second volume 2 of the housing 10 can be transmitted to a light guide 30. These one or more light guides form separate elements within the lighting device and are not integrated with the housing 10. Furthermore, one or more light guides 30 must be provided with light coupling devices 35, which allow light from the light guides 30 to be coupled out. This can be achieved by selecting appropriate reflective elements, scattering elements, refractive particles and / or structures, and / or diffractive elements disposed in or on the surface of the light guide.

[0053] In this manner, the lighting device 1 according to the present invention emits light from the solid-state light source 40 having the same spectral distribution as that produced by the solid-state light source 40.

[0054] In a preferred embodiment, the solid-state light source 40 includes at least one laser light source. The performance and functionality of lasers make them an excellent light source choice for these types of lighting devices; the color of the lighting device is determined by selecting the light conversion material used in the light coupling device 35, using a laser and a light conversion material comprising, for example, two luminescent materials. For example, blue light source light can be converted into green-yellow converted light by using a first luminescent material comprising a green-yellow phosphor such as YAG and / or LuAG. However, using a second luminescent material comprising a red phosphor such as BSSN, ECAS, or KSF, blue light source light and / or green-yellow converted light can be converted into converted red light.

[0055] In another embodiment, the solid-state light source 40 includes more than one solid-state light source 40 that emits laser light sources of different colors during operation. Using three laser colors provides the possibility of selecting a desired color from a large color gamut in the 1931 CIE chromaticity diagram: that is, all colors enclosed by the triangle have the colors of the three laser light sources, preferably three laser light sources of the three primary colors (e.g., red, green, and blue). Furthermore, all colors within the triangle can be adjusted by changing the intensity ratio between the different colors of laser light.

[0056] In another embodiment, the light guide 30 includes an optical fiber, which may be helical or spiral. The use of optical fiber allows for a variety of highly decorative lamps or luminaires. One or both ends 33 or 36 of the light guide 30 must be optically coupled to a solid-state light source 40 and are partially disposed within an exhaust duct 60 disposed within a core post 20. When more than one solid-state light source 40 is used, only one optical fiber 30 coupled to more than one solid-state light source 40 may be used. Thus, the optical fiber 30 receives and transmits light generated by the solid-state light source 40. Alternatively, individual optical fibers 30 may be used. Thus, a lamp or luminaire may have more than one optical fiber 30, each emitting the same or different light colors. One or both ends 33, 36 of the optical fiber 30 may also be coupled to one or more solid-state light sources 40. The coupling of the two ends 33, 36 of the optical fiber 30 allows for a more uniform light distribution across the optical fiber 30.

[0057] Reference Figure 3 More than one solid-state light source 40 can be added to the lighting device 1 to emit light of different colors with a wide wavelength range. One or more solid-state light sources 40 are optically coupled to the light guide 30 through at least one of its ends 33 and 36. In some embodiments, the solid-state light source 40 may be directly coupled to only one end 33 or 36 of the light guide 30. In some embodiments, the solid-state light source 40 may include a laser source, such as a laser diode and / or a light-emitting diode. In some embodiments, the light source 40 may include more than one laser diode and / or more than one light-emitting diode. The solid-state light source 40 is preferably fixed to the base 70.

[0058] The optical guide 30 includes an optical fiber 30, which can be shaped in various forms, such as helical winding. At least one of the ends 33 and 36 of the optical fiber 30 is optically coupled to a solid-state light source 40. More than one optical fiber 30 can be used and coupled to a single solid-state light source 40. Figure 4 and Figure 6 Alternatively, more than one optical fiber 30 may be used, each coupled to each solid-state light source 40. One or both ends 33 and 36 of the optical fiber 30 may also be coupled to one or more light sources 40.

[0059] The optical guide 30 can be defined as three parts ( Figure 5 The light guide 30 consists of a first portion (part 34) disposed within the second volume 2 of the housing 10, a second portion (part 37) disposed within the first volume 2' of the core pillar, preferably at least partially extending through the exhaust pipe 60, and a third portion (part 38) disposed outside the second volume 2 of the housing 10, which is coupled to the solid-state light source 40. The exhaust pipe 60 may define a defined volume 6', in which the light guide 30 is partially disposed. The volume 6' may include a tightly sealed gas, preferably an inert gas.

[0060] The optical fiber 30 is provided with an optical coupling device 35, which includes reflective elements, scattering elements, refractive particles and / or structures, and / or diffraction elements arranged in or on a surface from which light is emitted from the optical fiber 30. Reflective particles or bubbles may also be included in these optical coupling devices 35 covering the cladding 32 of the optical fiber 30. The optical coupling device 35 can be designed such that the optical fiber 30 emits light uniformly across its entire surface. The optical coupling device 35 is configured to couple light out of the optical guide 30 as coupled light into volume 2. The coupled light can be white light having a correlated color temperature range of 1500K to 6500K and a color rendering index of at least 80. Alternatively, for the optical fiber 30 having a spiral or helical shape, it can be designed to emit relatively more light from the helical portion and relatively less light from the non-helical portion, thereby forming a connection between the helical portion and the solid-state light source 40. Furthermore, the choice of materials as described above, as well as the choice of surface roughness along the optical fiber 30, can also be beneficial for emitting more light and make the emission along the optical fiber 30 of the lighting device 1 very similar to that of a carbon filament lamp or a conventional lamp.

[0061] Refer again Figure 3 Each end 33 and 36 of the optical fiber 30 is connected to the solid-state light source 40. Light emitted by the solid-state light source 40 now enters the optical fiber 30 from both sides, resulting in a more uniform light distribution across the optical fiber 30. Alternatively, only one end of the optical fiber 30, 33 or 36, may be optically coupled to the solid-state light source 40, in which case the other end 33 or 36 is not in optical contact with the solid-state light source 40.

[0062] Another option is to optically couple the ends 33 or 36 of the optical fiber 30 to more than one solid-state light source 40, thereby allowing for higher light output of the lighting device 1.

[0063] exist Figure 3In this configuration, light emitted by two solid-state light sources 40 can be mixed before entering a light guide 30 (such as, for example, an optical fiber 30). Each of the two solid-state light sources 40 may include a laser light source having the same or different colors. These colors can be mixed by a light scattering element, which can be placed in a core post 20 and optically contacted by the laser light source 40. The ends 33, 36 of the optical fiber 30 can be optically contacted by the light scattering element to pick up the uniformly mixed light.

[0064] Figure 5 A cross-section A of an optical fiber 30, comprising a core 31 and a cladding 32, is shown. Preferably, the refractive index of the cladding 32 is lower than the reflectivity of the core 31, and the melting temperatures (Tm1a) of the core 31 and (Tm1b) of the cladding 32 are higher than the melting temperature (Tm2) of the core post 20 and the optional melting temperature (Tm3) of the outer shell 10. It is also preferred that the optical fiber 30 comprises silica, fluorine-doped glass, and / or quartz. Specifically, fluorine-doped glass may be used for the cladding 32, and quartz may be used for the core 31. The optical fiber 30 is arranged through an exhaust pipe 60 such that at least a portion of the optical fiber 30 occupies a portion of the exhaust pipe 60. More specifically, the core post 20 includes at least one exhaust pipe 60 that encloses gas within a volume. Thus, at least a portion of at least one optical fiber 30 passes through the exhaust pipe 60 through the gas within the volume of the exhaust pipe 60.

[0065] Figure 4 Another embodiment of the invention is illustrated, showing a core post 20 that may include more than one exhaust duct 60. Optical fibers 30 may be arranged to pass through the same exhaust duct 60 or through more than one exhaust duct 60, and each end 33 or 36 may be arranged to pass through a different exhaust duct 60. If more than one optical fiber 30 is used, they may be arranged to pass through the same exhaust duct 60, or each optical fiber 60 may be arranged in a separate exhaust duct 60, or each exhaust duct 60 may contain more than one end 33 or 36 of different optical fibers 30.

[0066] Figure 4 and Figure 6The illustration shows the use of more than one optical fiber 30 connected to the same solid-state light source 40. However, each optical fiber 30 may include a solid-state light source 40, and the optical fiber 30 may be optically connected to more than one solid-state light source 40, with each end 33, 36 corresponding to one solid-state light source 40. The optical fiber 30 is partially disposed within the housing 10, partially disposed outside the housing 10, and partially disposed within the core post 20, more precisely disposed within an exhaust pipe 60 that forms part of the core post 20. More than one optical fiber 30 may be disposed within the same exhaust pipe 60. Alternatively, each optical fiber 30 may be disposed within at least one exhaust pipe 60. In other words, each end 33, 36 of the optical fiber 30 may be disposed within an exhaust pipe 60 having a sealed first volume 2' or having more than one separate first volume 2', with each end 33, 36 corresponding to one first volume 2'. When the optical fiber 30 is arranged in more than one exhaust pipe 60, each end 33, 36 is arranged in a first sealed volume 2' existing in two different exhaust pipes 60.

[0067] Optical fiber 30 can be coupled to each solid-state light source 40, similar to the case of having only one solid-state light source 40. However, the lighting device 1 has even higher values ​​because it will have more than one optical fiber 30, and each optical fiber 30 can emit light of a different color.

[0068] The lighting device 1 includes a solid-state light source 40, such as one or more laser light sources, electronic components, and an electronic drive device for converting the mains voltage input of 230V AC or 110V AC into a signal suitable for driving the solid-state light source 40.

[0069] The lighting device 1 also includes an optical fiber 30 coupled to a solid-state light source 40. In operation, the solid-state light source 40 emits light and transmits it via total internal reflection (TIR) ​​to the optical fiber 30, reaching the light guide portion 34 of the light guide 30, which is arranged within the second volume 2. The optical fiber is provided with optical coupling devices 35, from which light is emitted. These optical coupling devices 35 can be designed such that the optical fiber 30 emits light uniformly across its entire surface. Alternatively, the optical fiber 30, having a spiral or helical shape, can be designed to emit relatively more light from the helical portion than from the relatively straight portion, forming a connection between the helical portion and the solid-state light source 40. This can be achieved, for example, by selecting reflective elements and / or scattering elements and / or refractive particles and / or structures, and / or diffractive elements arranged in or on the optical fiber 30. In this way, the emission along the optical fiber 30 will be very similar to the emission of a carbon filament lamp.

[0070] When the solid-state light source 40 is excited, the light emitted from the solid-state light source 40 is optically coupled to the light guide 30, such that at least a portion of the emitted light enters the light guide 30. In this embodiment, the optical fiber 30 branches off from the core 31 and passes through the cladding 32 of the optical fiber 30, which has a spiral or helical shape. At least one optical fiber 30 includes one or more coupling devices 35. Such an illumination device 1, which emits light from the optical fiber 30 enclosed within a translucent housing 10, can have better performance than a conventional light bulb (e.g., an Edison type), can consume less power than a conventional light bulb, and can have better functionality and / or appearance than a conventional light bulb.

[0071] Figure 3 and Figure 7 An embodiment is shown in which the optical fiber 30 is partially arranged within the exhaust pipe 60. However, depending on the form and size of the exhaust pipe 60 and the desired illumination output, the portion where the optical fiber 30 intersects with the exhaust pipe 60 can be defined differently. Figure 7 In this configuration, a further extension of the optical fiber 30 is arranged within the exhaust pipe 60, allowing for greater interaction between the optical fiber 30 and the environment of the exhaust pipe 60. More specifically, the optical fiber 30 can interact with the gas present in the exhaust pipe 60, which is sealed within a first volume within the core post 20.

[0072] Figure 8 , Figure 9 and Figure 10 Different embodiments of the exhaust pipe 60 are shown. The core post 20 may include more than one connected or separate exhaust pipe 60. Each exhaust pipe may contain the same or different gases, preferably inert gases, in the second volume. The exhaust pipe 60 is not limited to the shape of a tube and may be formed in other forms. Most importantly, a portion of the optical guide 30 may be partially arranged within the exhaust pipe 60. This arrangement is not limited to a straight portion of the optical fiber 30, but may also be partially arranged within the exhaust pipe 60 by more than one portion of the same or different ends 33, 36, for example, not limited to a spiral or serpentine shape.

[0073] An exhaust pipe 60 can be added to the lighting fixture 1, which uses one or more optical fibers 30 to help dissipate the heat generated by the solid-state light source 40. Heat can be a problem in lighting fixtures because it can shorten their lifespan and create safety hazards.

[0074] The exhaust pipe 60 allows heat to be carried away from the optical fiber 30, thus reducing the temperature inside the lighting device and extending its lifespan. The exhaust pipe 60 can also be used for heat dissipation and cooling of the optical fiber 30, making the lighting device more efficient and reliable. A ventilation system or device can be used to cool the solid-state light source 40 or the optical fiber 30. In this way, the exhaust pipe 60 can be used for heat dissipation and cooling of the optical fiber 30 and / or the solid-state light source 40, making the lighting device 1 more efficient and reliable.

[0075] The interaction between the vent 60 and the optical fiber 30 in the lighting device 1 will depend on the specific application and design of the lighting device 1. Typically, the vent 60 may not directly interact with the optical fiber 30 itself, as the optical fiber is usually made of glass or plastic and used to transmit light, while the vent 60 is used to dissipate heat. However, the vent 60 can indirectly impact the optical fiber 30. For example, if the vent 60 is used to dissipate heat from the light source, it can help prevent heat from damaging one or more optical fibers 30 or causing them to warp or bend. This helps ensure that light is transmitted through the optical fiber 30 with minimal loss or distortion, which can improve the overall performance of the lighting device 1. It is also possible that the vent 60 can be used to dissipate any other byproducts of the lighting device 1 that could damage or even render one or more optical fibers 30 unusable.

[0076] In summary, the exhaust pipe 60 in the lighting device 1 using one or more optical fibers 30 will play a supporting role in maintaining the integrity and performance of the optical fiber 30 by removing any potential heat or harmful gases or byproducts that may come into contact with the optical fiber 30.

[0077] If the housing 10 is made of a transparent and / or translucent material, preferably glass, the lighting device 1 will have high decorative value. Using a laser light source 40 and an optical fiber 30 with a spiral or helical shape, the lighting device 1 will be very similar to a known carbon filament lamp commonly used for lighting. However, carbon filament lamps are expensive, easily damaged, and have very low luminous efficiency. The lighting device 1 according to the invention overcomes these disadvantages: it can be used to produce light with good color while providing high light output and an extremely long lifespan.

[0078] Another feature that can be incorporated into the lighting device 1 is the inner surface 11, which can be a coating of luminescent material. The coating can alter the color of the light emitted from the solid-state light source 40. Furthermore, when the housing 10 is bulb-shaped, the lighting device 1 will have the appearance of a diffuse incandescent lamp. Therefore, these lighting devices are well-suited to replace incandescent lamps.

[0079] It is advantageous when the lighting device 1 according to the invention can be used as a substitute for a common incandescent lamp. Therefore, it is preferable that the base 70 of the lighting device 1 is a screw base or a bayonet base. In particular, screw bases of types E5, E10, E11, E12, E14, E17, E26, E27, E29, E39, and E40 are often used in automotive lamp sockets, etc.

[0080] To ensure full compatibility with standard incandescent lamps, the lighting device 1 must include electronic components or electronic drivers equipped with a power source to convert the mains voltage supply (typically 230VAC or 110V AC) into an output signal suitable for driving the solid-state light source 40. Additionally, these electronic components or electronic drivers may include electronic circuitry for controlling the color and intensity, light output, and / or settings of the lighting device 1. Color and intensity can be controlled by a remote control unit, buttons on the base 70, or other types of user interfaces.

[0081] For this purpose, the electronic components or electronic drive devices may include a power supply and a control unit for intensity and color settings. These electronic components or electronic drive devices may be housed in the base 70. Furthermore, the base 70 may include a cap.

[0082] Figure 11 A luminaire 100 is shown. The luminaire 1 preferably has a base 70, which is configured to electrically and mechanically connect the luminaire 1 to a socket 90 of the luminaire 100.

[0083] This invention is not limited to lighting devices with conventional light bulbs that are shaped to have a translucent outer shell or an outer shell with a luminescent material coated on the inner side 11 and a standardized base 70. The invention is also applicable to, for example, tubular lamps with connectors at both ends of the tube, but incompatible lighting devices are also contemplated.

Claims

1. A lighting device (1) that provides device light and includes at least: -Transparent outer shell (10); - A core post (20) is arranged at least partially within the housing (10), at least a portion of the core post defining a first volume (2'), while a second volume (2) is defined between the core post (20) and the housing (10); - An optical guide (30) having a melting temperature (Tm1) higher than the melting temperature (Tm2) of the core post, and the melting temperature (Tm1) of the optical guide being higher than the melting temperature (Tm3) of the outer shell, the optical guide being partially arranged within the first volume (2'), partially arranged within the second volume (2), and partially arranged outside the first volume (2') and the second volume (2); - A solid-state light source (40) provides light and is arranged outside the first volume (2') and the second volume (2); - wherein at least a portion of the light source light is coupled to the light guide (30) at a first end (33) of the light guide portion (38), the light guide portion (38) is arranged outside the first volume (2') and the second volume (2), and is guided by total internal reflection (TIR) ​​through the light guide to the light guide portion (34) arranged in the second volume (2); -The light guide portion (34) of the light guide (30) arranged within the second volume (2) includes one or more optical coupling devices (35) configured to couple the light guide (30) into the second volume (2) as coupled light.

2. The lighting device according to claim 1, wherein the second volume (2) is hermetically sealed by the housing (10) and optionally includes gas.

3. The lighting device according to claim 1 or 2, wherein the first volume (2') comprises gas.

4. The lighting device according to any one of the preceding claims, wherein the light guide (30) comprises at least an optical fiber (50), the optical fiber (50) comprising a core (31) and a cladding (32), wherein the cladding (32) has a refractive index lower than that of the core (31).

5. The lighting device according to claim 4, wherein the melting temperature (Tm1a) of the core (31) and the melting temperature (Tm1b) of the cladding (32) are higher than the melting temperature (Tm2) of the core post (20), and optionally higher than the melting temperature (Tm3) of the outer shell (10).

6. The lighting device according to any one of the preceding claims, wherein the light guide (30) comprises at least one of the following: silicon dioxide, fluorine-doped glass, and quartz.

7. The lighting device according to any one of the preceding claims, wherein the core (20) includes an exhaust pipe (60) defining a defined volume (6') in which the light guide (30) is partially disposed.

8. The lighting device according to any one of the preceding claims, wherein the solid-state light source (40) includes a laser light source.

9. The lighting device according to any one of the preceding claims, wherein the coupled light is white light having a correlated color temperature in the range of 1500K to 6500K and a color rendering index of at least 80.

10. The lighting device according to any one of the preceding claims, wherein the light source light is blue light source light, and wherein the light coupling device (35) comprises a light conversion material to convert the blue light source light at least partially into converted light.

11. The lighting device according to any one of the preceding claims, wherein the solid-state light source (40) is disposed in a base (70) of the lighting device (1); the base (70) is configured to electrically and mechanically connect the lighting device to a socket (90) of a luminaire (100).

12. The lighting device according to any one of the preceding claims, wherein the light output device (35) includes a reflective element, a scattering element, a refractive element and / or a diffractive element disposed in or on the surface of the light guide (30).

13. The lighting device according to any one of the preceding claims, wherein the light guide portion (34) within the second volume (2) has a spiral or helical shape.

14. The lighting device according to any one of the preceding claims, wherein the light source is emitted by the solid-state light source (40) in a direction away from the inner surface (11) of the housing (10).

15. A lamp or luminaire (100) comprising a lighting device (1) according to any one of the preceding claims.

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