RU2727214C2 - Steering assembly with illumination - Google Patents

Abstract

FIELD: vehicle lighting systems.SUBSTANCE: lighting system for a steering wheel unit of a vehicle comprises a light source and a first photoluminescent structure. Light source has a plurality of independently illuminated areas arranged around the circumference of the steering wheel. Photoluminescent structure is placed on the light source and is configured to luminesce in response to excitation by the light source. Light source progressively highlights adjacent sections to notify driver about proposed direction of steering wheel rotation.EFFECT: higher quality of illumination of various areas of vehicle.20 cl, 8 dwg

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application is a partial continuation of US Patent Application No. 14 / 603,636, filed January 23, 2015, titled "DOOR ILLUMINATION AND WARNING SYSTEM", which is a partial continuation of US Patent Application No. 14 / 086,442, filed 21 November 2013 under the name "VEHICLE LIGHTING SYSTEM WITH PHOTOLUMINESCENT STRUCTURE". The aforementioned related applications are hereby incorporated by reference in their entirety.

TECHNICAL FIELD OF THE INVENTION

[0002] The present invention relates generally to vehicle lighting systems, and more particularly to vehicle lighting systems using one or more photoluminescent structures.

BACKGROUND OF THE INVENTION

[0003] The backlight resulting from the use of photoluminescent structures provides a unique and attractive visual experience. Therefore, it is desirable to use such structures in automotive vehicles for various lighting applications.

SUMMARY OF THE INVENTION

[0004] According to one aspect of the present invention, a lighting system for a vehicle is disclosed. The lighting system includes a light source located on the steering wheel. The first photoluminescent structure is located on the light source and is configured to luminesce in response to excitation by the light source.

[0005] According to another aspect of the present invention, a lighting system is disclosed. The lighting system includes a steering wheel having a central hub and a rim connected to the hub by means of a spoke. The light source is located on the rim. The first luminescent structure is located on the steering wheel and is configured to luminesce in response to excitation by at least a portion of the light source.

[0006] In accordance with yet another aspect of the present invention, a lighting system for a steering wheel assembly of a vehicle is disclosed. The lighting system includes a light source located in a vehicle. The first photoluminescent structure is located on the steering wheel. The first photoluminescent structure is configured to luminesce in response to excitation with light emitted from at least a portion of the light source.

[0007] These and other aspects, objects and features of the present invention will be understood and taken into account by a person skilled in the art upon examination of the following description, claims and accompanying drawings.

BRIEF DESCRIPTION OF DRAWINGS

[0008] In the drawings:

[0009] FIG. 1 is a perspective view of a vehicle interior equipped with a lighting system used on a steering wheel assembly in accordance with one embodiment;

[0010] FIG. 2 is a front view of a steering wheel assembly located in a vehicle cabin using a lighting system in accordance with one embodiment;

[0011] FIG. 3A is a cross-sectional view taken along line III-III in FIG. 2 illustrating a light source in accordance with one embodiment;

[0012] FIG. 3B is a cross-sectional view taken along line III-III in FIG. 2, further illustrating a light source according to one embodiment;

[0013] FIG. 3C is a cross-sectional view taken along line III-III in FIG. 2 illustrating an alternative light source in accordance with one embodiment;

[0014] FIG. 3D is a sectional view taken along line III-III in FIG. 2 illustrating a light source having a luminescent structure separated by light transmitting portions disposed on the light source according to one embodiment;

[0015] FIG. 3E is a cross-sectional view taken along line III-III in FIG. 2 illustrating an alternative light source having a luminescent structure disposed on the light source configured to convert a portion of light emitted from the light source from a first wavelength to a second wavelength according to one embodiment;

[0016] FIG. 4 illustrates a top view of a light generating unit according to one embodiment having different types and concentrations of LED sources transversely along the light generating unit;

[0017] FIG. 5A is a front view of a vehicle steering wheel assembly using a lighting system in accordance with one embodiment;

[0018] FIG. 5B is a front view of a steering wheel assembly using a lighting system in accordance with one embodiment;

[0019] FIG. 6 illustrates an exemplary perspective view of a vehicle interior using a lighting system and a second luminescent portion on a vehicle element;

[0020] FIG. 7 illustrates an exemplary perspective view of a vehicle interior using a lighting system with a light source located in a component that is separate from the steering wheel, according to another embodiment; and

[0021] FIG. 8 is a schematic representation of a vehicle and lighting system.

DETAILED DESCRIPTION OF THE PREFERRED PERFORMANCE OPTIONS

[0022] For purposes of the present description, the expressions "top", "bottom", "right", "left", "back", "front", "vertical", "horizontal" and their derivatives will refer to the invention as it is oriented to FIG. 1. However, it should be understood that the invention may take on various alternative orientations, unless explicitly indicated otherwise. It should also be understood that the specific devices and processes illustrated in the accompanying drawings and described in the following description are merely exemplary embodiments of the inventive concepts defined in the appended claims. Therefore, specific dimensions and other physical characteristics related to the embodiments disclosed herein are not to be construed as limiting unless the claims explicitly state otherwise.

[0023] In accordance with the requirements, detailed embodiments of the present invention are disclosed herein. However, it should be understood that the disclosed embodiments are only an example of the invention, which may be embodied in various and alternative forms. The figures do not necessarily reveal the construction in detail, and some diagrams may be enlarged or reduced to provide an overview of their function. In this regard, the specific structural and functional details disclosed herein should not be interpreted as limiting, but only as providing a basis for a person skilled in the art to study the various applications of the present invention.

[0024] In this context, the expression "and / or" when used in a list of two or more elements means that any of the listed elements can be applied by itself, or any combination of two or more of the listed elements can be applied. For example, if the composition is described as containing components A, B and / or C, then the composition may contain only A; only B; only C; A and B combined; A and C combined; B and C combined; or A, B and C combined.

[0025] The following disclosure describes a lighting system configured to illuminate an area located in the vicinity of a vehicle steering wheel assembly. The lighting system can preferably use one or more photoluminescent structures to illuminate in response to predetermined events. One or more photoluminescent structures may be configured to convert light received from a respective light source and re-emit light at a different wavelength, typically in the visible spectrum. In some embodiments, the light source may be of a thin design, thereby facilitating the installation of the light source in small vehicle accommodation spaces where conventional light sources cannot be practiced.

[0026] With reference to FIG. 1, a lighting system 10 that is configured to illuminate an area and / or one or more components of a vehicle 14 located in the vicinity of a steering wheel 16 is disposed in a steering wheel assembly 12 of a vehicle 14 in accordance with one embodiment. The steering wheel assembly 12 is configured to control the operation of the steering for the vehicle 14. The steering wheel assembly 12 may be installed on a portion of the dashboard 18 of the vehicle interior 14. The steering wheel assembly 12 may include a steering column 20 and a steering wheel 16 connected with it for rotation in coordination with the steering column 20. The steering wheel 16 may include a hub 22 and a rim 24, which is connected to the hub 22 by means of at least one spoke 26. According to the illustrated embodiment, three spokes are used to connect the hub 22 to the rim 24 26, which are substantially concentrated in the lower half of the steering wheel 16 to provide sufficient visibility to the instrument panel 28, which is located forward of the vehicle from the steering wheel 16. However, it is envisaged that any number of spokes 26 in any orientation can be used without deviating from the present inventions.

[0027] When the driver wants to control the steering angle of the running wheels of the vehicle 14, the driver turns the rim 24 of the steering wheel 16. Since the rim 24 is connected to the hub 22 via the spokes 26, the rotation of the rim 24 causes the hub 22 and the shaft 30 to rotate. The shaft 30 is connected to a steering gear (not shown) that adjusts the angular position of the vehicle wheels in order to control the steering.

[0028] Vehicle 14 may further include a seat assembly 32 that includes a seat 34 pivotally coupled to the seat back 36 and a gear selector 38 that controls the mode of operation of the vehicle's gearbox. It should be understood that the steering wheel assembly 12 described herein may be used for any vehicle 14, such as, but not limited to, coupes, sedans, trucks, SUVs, vans, and the like. Additionally, it should be understood that any lighting system found elsewhere on vehicle 14 may also be manufactured in accordance with the principles of the present invention.

[0029] As shown in FIG. 2, steering wheel 16 includes spokes 26 connecting hub 22 to rim 24. Hub 22 may include a support member 40 that may structurally support hub 22 and / or spokes 26 and rim 24. A trim member 42 may be attached and is located in the rearward direction of the vehicle from the support member 40. An airbag (not shown) may be positioned between the support member 40 and the trim member 42. The trim member 42 may further include a sign 44 on it, such as an emblem, logo or information for driver (for example, the placement of airbags). Any component of hub 22 and / or spokes 26 may include controls 46 thereon to control a variety of vehicle functions. For example, controls 46 may activate the horn of the vehicle. Additionally or alternatively, controls 46 may be used to operate the cruise control system. Additional controls 46 may be used to control the audio system, telephone and voice control system, navigation system, stereo system and on-board computer functions, or any other function that may be required by the driver and / or passenger.

[0030] The rim 24 may be formed from a base 48 that has a cover 50 over it. In an exemplary embodiment, the base 48 is a metal or plastic rod that has a circular cross section. In another embodiment, the base 48 is a hollow tubular element. In alternative embodiments, the base 48 has a rectangular or polygonal cross-sectional shape. Any suitable material can be used to form the base 48, including but not limited to steel, aluminum, and magnesium. Also, any suitable polymeric material can be used to form the base 48, for example, silicone-modified polycarbonates, nylon, polyesters, polyphenylene oxide, polypropylene, and polyurethane.

[0031] Covering member 50 may be positioned over base 48 and may be a soft or substantially rigid material. In one embodiment, the cover 50 may be made of a flexible material that may comprise a thermoplastic elastomer such as a thermoplastic olefin or thermoplastic urethane, vinyl, leather, fabric, or other materials suitable for providing a flexible layer over the base 48 as are known in the art. technology. One or more intermediate components may be located between the base 48 and the cover 50, which may also be flexible enough to deflect when an external force is applied, such as pressure applied by the hand of a vehicle driver, to compress the cover 50 and / or the intermediate components. if necessary. For example, the steering wheel assembly 12 may include intermediate components such that the steering wheel 16 may be temperature controlled to heat and cool the driver's hands while steering the vehicle 14, as is known in the art.

[0032] In alternative embodiments, the cover 50 may be made of a substantially rigid material. In one embodiment, the cover 50 is in the form of a veneer made of wood material. It should be understood that the cover 50 may be formed from any other material of practical use without departing from the spirit of the present invention. In addition, it should be understood that the cover 50 may include any additional layers thereon to protect the cover 50 or to provide a desired aesthetic appearance.

[0033] The light source 52 may be located on and / or in the steering wheel assembly 12. As illustrated, the light source 52 is located on the rim 24 and oriented to emit light towards the driver in the vehicle 14. According to one embodiment, the light source 52 includes a flexible circuit board (e.g., a copper flex board) that is connected, attached to or located underneath a portion of cover 50. In such a structure, the flexible mounting plate can be flexed in conjunction with the bending of the rim 24 to allow the lighting system 10 to bend around the steering wheel 16.

[0034] The photoluminescent structure 62 can be applied or otherwise placed on and / or near the light source 52. One or more light sources 52 may be located in the lighting system 10 and configured to emit light towards a target location. More specifically, light emitted from the light source 52 towards the target site can be converted by the photoluminescent structure 62 and re-emitted as light having a different wavelength, usually in the visible spectrum. In the illustrated embodiment, the target location is an area located near the steering wheel 16. It is contemplated that the lighting system 10 can have a wide range of target locations so that the lighting system 10 can be used for a variety of functions. Exemplary functions include the use as meeting / following lighting, a warning indicator, general lighting, and / or a lamp that provides information about elements 148 (FIG. 6) of vehicle 14 to a driver and / or passenger.

[0035] The light source 52 may be molded or otherwise attached to a portion of the steering wheel 16, such as a rim 24. In the embodiment illustrated in FIG. 2, the rim 24 and the light source 52 are placed in the mold simultaneously, and the over-molded material 66 is positioned over the combination of the rim 24 and the light source 52. In embodiments in which over-molded material 66 is pressure cured, over-molded material 66 may be applied to rim 24 in a partially cured state. In one embodiment, the overmolding process includes applying the over-molded material 66 to at least a portion of the combination of the rim 24 and light source 52 by spraying, brushing, dipping, printing, laminating, or rolling, and then curing the over-formed material 66. This process results in that the rim 24 and the light source 52 are connected to each other. In some embodiments, over-molded material 66 may include polymeric material, silicon, urethane material, vinyl, and / or any other material that may be preferred or structurally strong for placement in an area that regularly comes into contact with a driver and / or passenger. vehicle 14. In addition, in some embodiments, the over-molded material 66 may be transparent or light-transmitting and may provide light scattering characteristics. It is also contemplated that, in some embodiments, Cover 50 and over-molded material 66 may be the same component or may be integrally formed with each other.

[0036] With reference to FIG. 3A-3E show a cross-sectional view of a light source 52 suitable for use on a vehicle 14 with an external photoluminescent structure 62 according to one embodiment. As illustrated in FIG. 3A, the light source 52 may have a multi-layer structure that includes a light production unit 60, a photoluminescent structure 62, a visible region 64, and an over-molded material 66. It should be understood that the visible region 64 and the over-molded material 66 can be two separate components or can be formed in one piece as a single component.

[0037] The light-generating unit 60 may correspond to an assembly of thin-film or printed light-emitting diodes (LEDs) and may include a substrate 68 as its lowermost layer. Substrate 68 may include a material of polycarbonate, polymethyl methacrylate (PMMA), or polyethylene terephthalate (PET), or any other material known in the art, in the order of 0.0127-0.1524 cm thick, and is positioned above the intended surface of the vehicle 14, on which the light source 52 is to be received (eg, rim 24). Alternatively, as a cost reduction measure, the substrate 68 may directly correspond to an existing vehicle structure (eg, rim 24, outer panels and / or inner panels).

[0038] The light-generating assembly 60 includes a positive electrode 70 located above the substrate 68. The positive electrode 70 includes a conductive epoxy resin such as, but not limited to, an epoxy resin containing silver or copper. The positive electrode 70 is electrically connected to at least a portion of a plurality of LED sources 72 disposed in the semiconductor ink 74 and applied to the positive electrode 70. Similarly, the negative electrode 76 is also electrically connected to at least a portion of the LED sources 72. The negative electrode 76 is located above the semiconductor ink 74 and includes a transparent or light-transmitting conductive material such as, but not limited to, indium tin oxide. Additionally, each of the positive and negative electrodes 70, 76 is electrically connected to the controller 78 and the power source 80 through a corresponding bus 82, 84 and conductive wires 86, 88. The buses 82, 84 can be printed along the opposite edges of the positive and negative electrodes 70, 76, and the points of connection between the buses 82, 84 and the conductive wires 86, 88 may be located at opposite corners of each bus 82, 84 to help distribute the current evenly across the buses 82, 84. It should be understood that in alternative embodiments, the orientation of the components in the light generating assembly 60 can be changed without departing from the spirit of the present invention. For example, the negative electrode 76 may be located below the semiconductor ink 74, and the positive electrode 70 may be located above the aforementioned semiconductor ink 74. Similarly, additional components such as the busbars 82, 84 may also be located in any orientation so that the light production unit 60 could emit incoming light 100 (Fig. 3B) towards the desired location.

[0039] LED sources 72 can be distributed in an arbitrary or controllable manner in semiconductor ink 74 and can be configured to emit focused or unfocused light towards the photoluminescent structure 62. LED sources 72 can correspond to micro-light emitting diodes of gallium nitride elements in the order of about 5 to about 400 microns, and the semiconductor ink 74 can include various bonding materials and dielectric material, including, but not limited to, one or more of gallium, indium, silicon carbide, phosphorus, and / or transparent polymeric bonding materials.

[0040] The semiconductor ink 74 can be applied by various printing processes, including inkjet and screen printing processes, onto the selected portion (s) of the positive electrode 70. More specifically, it is assumed that the LED sources 72 are distributed in the semiconductor ink 74 and have a shape and size such that a significant number of LED sources 72 align with the positive and negative electrodes 70, 76 when semiconductor ink 74 is applied. A portion of the LED sources 72 that are ultimately electrically connected to the positive and negative electrodes 70, 76 can be illuminated using a combination of buses 82, 84, controller 78, power supply 80, and lead wires 86, 88. In one embodiment, power supply 80 may correspond to vehicle power supply 80 operating at 12-16 volts DC. Additional information regarding the design of light generating units is disclosed in US Patent Publication No. 2014/0264396 A1 to Lowenthal et al. Entitled "ULTRA-THIN PRINTED LED LAYER REMOVED FROM SUBSTRATE" published March 12, 2014, the full disclosure of which is hereby incorporated herein by reference.

[0041] Also with reference to FIG. 3A, the photoluminescent structure 62 is positioned above the negative electrode 76 as a coating, layer, film, or other suitable application. With respect to the present illustrated embodiment, the photoluminescent structure 62 may be a multilayer structure including an energy conversion layer 90, an optional stabilizing layer 92 and an optional protective layer 94.

[0042] The energy conversion layer 90 includes at least one photoluminescent material 96 having energy conversion elements with phosphorescent or fluorescent properties. For example, the photoluminescent material 96 can include organic or inorganic fluorescent dyes, including rylenes, xanthenes, porphyrins, phthalocyanines. Additionally or alternatively, the photoluminescent material 96 may include luminescent substances from the group of cerium-doped garnets, for example YAG: Ce. The energy conversion layer 90 can be prepared by dispersing the photoluminescent material 96 in a polymer matrix to form a homogeneous mixture using a variety of methods. Such methods may include preparing an energy conversion layer 90 from a composition in a liquid carrier and applying an energy conversion layer 90 to negative electrode 76 or other desired substrate 68. The energy conversion layer 90 may be applied to negative electrode 76 by dyeing, screen printing, flexography, spraying, slot-coating, dip coating, strip coating roll coating, and / or any other methods known in the art.

Alternatively, the energy conversion layer 90 can be prepared by methods that do not use a liquid carrier. For example, the energy conversion layer 90 can be formed by dispersing the photoluminescent material 96 into a solid solution (homogeneous mixture in a dry state) that can be incorporated into a polymer matrix formed by extrusion, injection molding, compression compaction, calendering, hot molding, etc.

[0043] To protect the photoluminescent material 96 contained in the energy conversion layer 90 from photolytic and thermal degradation, the photoluminescent structure 62 may include a stabilizing layer 92. The stabilizing layer 92 may be formed as a separate layer optically bonded and adhered to an energy conversion layer 90 or otherwise combined with it. The photoluminescent structure 62 may also include a protective layer 94 optically coupled and adhered to a resilient layer 92 or another layer (e.g., an energy conversion layer 90 in the absence of a resilient layer 92) to protect the photoluminescent structure 62 from physical and chemical degradation resulting from due to environmental influences. The resilience layer 92 and / or the backing layer 94 may be combined with the energy conversion layer 90 by sequential application or printing of each layer, sequential lamination or embossing, or any other suitable means. Additional information regarding the design of photoluminescent structures is disclosed in US Patent No. 8,232,533 to Kingsley et al., Entitled "PHOTOLYTICALLY AND ENVIRONMENTALLY STABLE MULTILAYER STRUCTURE FOR HIGH EFFICIENCY ELECTROMAGNETIC ENERGY CONVERSION AND SUSTAINED 2011" entities of which are hereby incorporated by reference.

[0044] In operation, the photoluminescent material 96 is composited to be energized upon receiving incoming light 100 (FIG. 3B) of a particular wavelength from at least a portion of the LED sources 72 of the light generating unit 60. As a result, the incoming light 100 undergoes an energy conversion process and re-radiated at a different wavelength. In one embodiment, the photoluminescent material 96 can be formulated to convert incoming light 100 to longer wavelength light, otherwise known as down-conversion. Alternatively, the photoluminescent material 96 can be formulated to convert incoming light 100 to shorter wavelength light, otherwise known as upconversion. In either approach, the light converted by the photoluminescent material 96 can be immediately output 102 (FIG. 3B) from the photoluminescent structure 62 or otherwise used in an energy cascade in which the converted light serves as incoming light to excite another composition of the photoluminescent material 96 located in the energy conversion layer 90, wherein the subsequent converted light can then be outputted from the photoluminescent structure 62 or used as incoming light, etc. With respect to the energy conversion processes described herein, the difference in wavelength between the incoming light 100 and the converted outgoing light 102 is known as Stokes shift and serves as the primary driving mechanism for the energy conversion process corresponding to the change in the wavelength of the light.

[0045] Next, referring to FIG. 3A, the visible region 64 is located above the photoluminescent structure 62. In some embodiments, the visible region 64 may include a plastic, silicon or urethane material and is molded onto the photoluminescent structure 62 and the light generating assembly 60. Preferably, the visible region 64 should be at least partially light transmitting. Thus, the visible area 64 will be illuminated by the photoluminescent structure 62 during the energy conversion process. Additionally, due to the over-molding of the visible region 64, it can also function to protect the photoluminescent structure 62 and the light-producing assembly 60. The visible region 64 may be flat and / or arcuate to increase its visibility potential in the luminescent state. Like the photoluminescent structure 62 and the light production unit 60, the visible region 64 can also benefit from a thin structure, thereby facilitating the installation of the light source 52 in small spaces to accommodate the vehicle 14.

[0046] In some embodiments, a decorative layer 98 may be located between the visible region 64 and the photoluminescent structure 62. The decorative layer 98 may include a polymer material or other suitable material and is configured to control or change the appearance of the visible region 64 of the light source 52 ... For example, the decorative layer 98 may be configured to impart a skin appearance to the visible area 64 when the visible area 64 is in an unlit state. In other embodiments, the decoration layer 98 can be painted in any color to complement the vehicle structure on which the light source 52 is to be received. For example, the decorative layer 98 may be the same color as the rim 24 so that the lighting system 10 is substantially hidden when unlit. Alternatively, the decorative layer 98 may provide a mark 44 and / or an emblem such that the decorative layer 98 and the mark 44 can be illuminated and / or otherwise illuminated by a light-generating unit 60. In any case, the decorative layer 98 must be at least partially light-transmitting such that the photoluminescent the structure 62 is not prevented from illuminating the visible portion 64 during the power conversion process.

[0047] The over-molded material 66 is disposed around the light production unit 60 and the photoluminescent structure 62 and may be integrally formed with the visible area 64. The over-molded material 66 can protect the light production unit 60 from physical and chemical damage due to environmental influences. The over-molded material 66 can have viscoelastic properties (i.e., have both toughness and resilience), low Young's modulus, and / or high strain at break compared to other materials, so that the over-molded material 66 can protect the light production assembly 60 in contact with him. For example, over-molded material 66 can protect the light production assembly 60 from repeated contact that can occur when drivers use the steering wheel assembly 12 using the lighting system 10 described herein.

[0048] In some embodiments, the photoluminescent structure 62 may be used separately and at a distance from the light-producing assembly 60. For example, the photoluminescent structure 62 may be located on a component or surface of the vehicle in close proximity, but not in physical contact, with the light-producing assembly 60, as will be described in detail below. It should be understood that in embodiments in which the photoluminescent structure 62 is embedded in various components separated from the light source 52, the light source 52 may nevertheless have the same or a similar structure as the light source 52 described with reference to FIG. 3A.

[0049] With reference to FIG. 3B illustrates a process 104 for converting energy to create monochromatic luminescence, in accordance with one embodiment. For purposes of illustration, the power conversion process 104 is described below using the light source 52 shown in FIG. 3A. In this embodiment, the energy conversion layer 90 of the photoluminescent structure 62 includes a single photoluminescent material 96 that is configured to convert incoming light 100 received from the LED sources 72 into outgoing light 102 having a different wavelength than that associated with the incoming light 100. More specifically, the photoluminescent material 96 is composited to have an absorption spectrum that includes the emission wavelength of the incoming light 100 supplied from the LED sources 72. The photoluminescent material 96 is also composited to have a Stokes shift. resulting in a converted visible outgoing light 102 having an emission spectrum expressed in the desired color, which can vary depending on the lighting application. The converted visible outgoing light 102 is output from the light source 52 through the visible area 64, thereby causing the visible area 64 to be illuminated with a desired color. In one embodiment, the energy conversion process 104 is downconverted, wherein the incoming light 100 includes light at the lower end of the visibility spectrum, such as blue, violet, or ultraviolet (UV) light. This allows the use of blue, violet, or UV light emitting diodes as LED sources 72, which can provide a relative cost advantage over simply using light emitting diodes of the desired color and the aforementioned energy conversion process in general. In addition, the backlight provided by the visible region 64 can provide a unique, substantially uniform and / or attractive visual experience that can be difficult to replicate with non-photoluminescent media.

[0050] With reference to FIG. 3C illustrates a second energy conversion process 106 for creating a plurality of colors of light in accordance with one embodiment. For comparability, the second power conversion process 106 is also described below using the light source 52 shown in FIG. 3A. In this embodiment, the energy conversion layer 90 includes first and second photoluminescent materials 96, 108 that are mixed in the energy conversion layer 90. Alternatively, the photoluminescent materials 96, 108 can be isolated from each other as needed. It should also be understood that the energy conversion layer 90 may include more than two different photoluminescent materials 96, 108, in which case the concepts provided herein are applied in a similar manner. In one embodiment, the second energy conversion process 106 is downconverted using blue, violet, and / or ultraviolet light as the excitation source.

[0051] With respect to the present illustrated embodiment, the excitation of the photoluminescent materials 96, 108 is mutually exclusive. That is, the photoluminescent materials 96, 108 are selected in composition so as to have non-overlapping absorption spectra and Stokes shifts that give different emission spectra. Also, when selecting the composition of the photoluminescent materials 96, 108, attention should be paid to the selection of the appropriate Stokes shifts so that the converted outgoing light 102 emitted from one of the photoluminescent materials 96, 108 does not excite the other, except when necessary. According to one exemplary embodiment, a first portion of LED sources 72, roughly shown as LED sources 72a, is configured to emit incoming light 100 having an emission wavelength that excites only the photoluminescent material 96 and converts the incoming light 100 into visible outgoing light 102 the first color (for example, white). Likewise, a second portion of LED sources 72, roughly shown as LED sources 72b, is configured to emit incoming light 100 having an emission wavelength that excites only the second photoluminescent material 108 and converts the incoming light 100 to visible outgoing light 102 of a second color (for example, red). Preferably, the first and second colors are visually distinguishable from each other. Thus, the LED sources 72a and 72b can be selectively activated using the controller 78 to cause the photoluminescent structure 62 to luminesce in multiple colors. For example, controller 78 may activate only the LED sources 72a to drive only the photoluminescent material 96, causing the visible region 64 to be illuminated with the first color. Alternatively, the controller 78 may activate only the LED sources 72b to drive only the second photoluminescent material 108, causing the visible area 64 to be illuminated with a second color.

[0052] Alternatively, controller 78 may activate LED sources 72a and 72b together, which causes both photoluminescent materials 96, 108 to be energized, resulting in visible region 64 being illuminated with a third color that is a mixture of first and second colors (eg, pink). The intensities of the incoming light 100 emitted from each light source 72a, 72b can also vary proportionally with respect to each other so that additional colors can be obtained. For energy conversion layers 90 containing more than two different photoluminescent materials 96, 108, a greater variety of colors can be obtained. The colors provided include red, green, blue, and combinations thereof including white, all of which can be obtained by selecting suitable photoluminescent materials and properly driving their respective LED sources 72.

[0053] With reference to FIG. 3D illustrates a third power conversion process 110 including a light generating unit 60, such as described with reference to FIG. 3A and a photoluminescent structure 62 disposed thereon, according to an alternative embodiment. The photoluminescent structure 62 is configured to convert the incoming light 100 received from the LED sources 72 into visible outgoing light 102 having a different wavelength from the wavelength associated with the incoming light 100. More specifically, the photoluminescent structure 62 is composited to have an absorption spectrum that includes the emission wavelength of the incoming light 100 supplied from the LED sources 72. The photoluminescent material 96 is also formulated to have a Stokes shift resulting in a converted visible outgoing light 102 having an emission spectrum expressed in the desired color , which can vary depending on the lighting application.

[0054] The photoluminescent structure 62 can only be applied to a portion of the light generating unit 60, for example in the form of a strip. Light-transmitting portions 112 may be located between the photoluminescent structures 62 to allow incoming light 100 emitted from LED sources 72 at a first wavelength to pass through them. The light-transmitting portions 112 may be open space, or may be made of transparent or light-transmitting material. The incoming light 100 emitted through the light transmitting portions 112 may be directed from the light generating unit 60 to a second photoluminescent structure 132 (FIG. 5) located near the light generating unit 60. The second photoluminescent structure 132 may be configured to luminesce in response to the incoming light 100. which is guided through the light transmitting portions 112.

[0055] With reference to FIG. 3E shows a fourth energy conversion process 114 for creating a plurality of light colors using a light generating unit 60 such as described with reference to FIG. 3A, and a photoluminescent structure 62 located thereon. In this embodiment, the photoluminescent structure 62 is positioned above the upper portion of the light generating assembly 60. The photoluminescent material 96 is excited so that a portion of the incoming light 100 emitted from the LED sources 72 passes through the photoluminescent structure 62 at a first wavelength (i.e., the incoming light 100 emitted from the light source 52 is not converted by the photoluminescent structure 62). The intensity of the emitted light 100 can be converted by pulse width modulation or current control to vary the amount of incoming light 100 emitted from the LED sources 72 that passes through the photoluminescent structure 62 without being converted to a second outgoing 102 wavelength. For example, if the light source 52 is configured to emit light 100 at a low level, substantially all of the incoming light 100 may be converted to a second wavelength of the outgoing light 102. In this configuration, the color of the outgoing light 102 corresponding to the photoluminescent structure 62 may be emitted from the light generating node 60. If the light source 52 is configured to emit incoming light 100 at a high level, only a portion of the first wavelength can be converted by the photoluminescent structure 62. In this configuration, the first portion of the incoming light 100 can be converted by the photoluminescent structure 62, and the second portion of the incoming light 100 may be emitted from the light generating unit 60 at a first wavelength towards additional photoluminescent structures 132 located near the light source 52. Additional photoluminescent structures 132 may luminesce in response to incoming light 100 emitted from light source 52.

[0056] According to one exemplary embodiment, a first portion of LED sources 72, roughly shown as LED sources 72a, is configured to emit incoming light 100 having a wavelength that excites the photoluminescent material 96 in the photoluminescent structure 62 and converts the incoming light 100 into visible light 102 of the first color (for example, white). Likewise, a second portion of LED sources 72, roughly shown as LED sources 72c, is configured to emit incoming light 100 having a wavelength that passes through the photoluminescent structure 62 and excites additional photoluminescent structures 132 located near the lighting system 10, thereby illuminating second color. The first and second colors can be visually distinguishable from each other. Thus, the LED sources 72a and 72c can be selectively activated using the controller 78 to cause the lighting system 10 to fluoresce in a variety of colors.

[0057] The light generating unit 60 may also include optics 116 that are configured to direct incoming light 100 emitted from LED sources 72a, 72c and outgoing light 102 emitted from photoluminescent structure 62 towards predetermined locations. For example, incoming light 100 emitted from LED sources 72a, 72c and photoluminescent structure 62 may be directed and / or focused towards a desired element 148 (FIG. 6) and / or a location near light source 52.

[0058] With reference to FIG. 4 illustrates a top view of a light production unit 60 according to one embodiment having different types and concentrations of LED sources 72a, 72d laterally along the light production unit 60. As illustrated, the first portion 118 of the light production unit 60 includes LED sources 72a that are configured to emit incoming light 100 having an emission wavelength in the first color (eg, white) spectrum. Likewise, the second portion 120 of the light generating unit 60 includes LED sources 72d that are configured to emit incoming light 100 having an emission wavelength in the second color (eg, red) spectrum. The first and second portions 118, 120 of the light-generating assembly 60 may be separated by insulating or non-conductive baffles 122 from the adjacent portions by any means known in the art so that each portion 118, 120 can be illuminated independently of any other portion 118, 120 Additionally, each region 118, 120 located in the light production unit 60 may include a respective bus 82, 84, 124, 126, 128, 130 coupled to the controller 78 and configured to illuminate each respective region 118, 120. It should be understood that tires 82, 84, 124, 126, 128, 130 may be connected to each portion 118, 120 of the light generating assembly 60 on opposite sides in alternative embodiments as described above.

[0059] In one embodiment, the first and second colors are visually distinguishable from each other. Thus, the LED sources 72a and 72d can be selectively activated using the controller 78 to cause the LED sources 72a, 72d to be illuminated with a plurality of colors. For example, the controller 78 may activate only the LED sources 72a to illuminate only the portion 118 of the light generating unit 60 with the first color. Alternatively, the controller 78 may only activate the LED sources 72d to illuminate only the portion 120 of the light production unit 60 with a second color. It should be understood that the light production unit 60 may include any number of regions 118, 120 having different LED sources 72a, 72d that can be illuminated in any desired color. In addition, it should also be understood that portions having different LED sources 72a, 72d may be oriented in any practicable manner and are not necessarily contiguous.

[0060] The semiconductor ink 74 can also contain different concentrations of LED sources 72a, 72d such that the density of LED sources 72a, 72d or the number of LED sources 72a, 72d per unit area can be adjusted for different lighting applications. In some embodiments, the density of the LED sources 72a, 72d may vary along the length of the light source 52. For example, portion 120 of light generating assembly 60 may have a higher density of LED sources 72 than peripheral portions 118, or vice versa. In such embodiments, the light source 52 may appear brighter or brighter in order to preferentially highlight specific locations. In other embodiments, the density of the LED sources 72a, 72d may increase or decrease with increasing distance from a preselected point.

[0061] With reference to FIG. 5A and 5B, the lighting system 10 is adapted to be attached to the rim 24 of the steering wheel 16 in accordance with one embodiment. As illustrated, the light generating unit 60 emits a substantial portion of the incoming light 100 and outgoing light 102 in a rearward orientation in the vehicle 14. However, it is contemplated that the incoming light 100 can be directed in any desired direction in the vehicle 14 depending on the design and placement of the steering unit 12. wheels.

[0062] The photoluminescent structure 62 is operatively connected to the light source 52. For example, in one embodiment, the light source 52 may be located below the cover 50. The photoluminescent structure 62 may be located in the material of the cover 50 and functionally connected to the light source 52. As a result, the portion of the cover member 50 containing the photoluminescent structure 62 can be excited by the light source 52 and emit the converted outgoing light 102.

[0063] The lighting system 10 may further include a user interface 134 located near the lighting system 10 or any other desired location in the vehicle 14. The user interface 134 may be configured such that a user can control the wavelength of light that is emitted by the LED sources. 72a and / or LED sources 72d, which are illuminated. Alternatively, the user interface 134 may be used to switch the lighting system 10 to a variety of modes and / or functions. The user interface 134 can use any type of control known in the art to control the light source 52, such as, but not limited to, switches (eg, proximity sensors, push buttons), and can be located anywhere practicable. For example, the user interface 134 may be located on one of the spokes 26.

[0064] With reference to FIG. 5A illustrates a light production unit 60 having five portions 54a, 54b, 54c, 54d, 54e. Each region 54a, 54b, 54c, 54d, 54e can be illuminated separately and in a variety of colors and intensities, as described herein. Such a configuration may allow the lighting system 10 to be used as a turn signal notification to notify the driver of the position of the vehicle turn signal. Accordingly, each portion 54a, 54b, 54c, 54d, 54e may be sequentially illuminated to provide directional notification of positional states of the vehicle turn signal. More specifically, section 54a may be illuminated first, then section 54b, section 54c, section 54d, and ending with section 54e. Each previously highlighted area 54a, 54b, 54c, 54d can maintain its highlighted state when each subsequent area is highlighted. Alternatively, each region 54a, 54b, 54c, 54d, 54e may return to an unlit state when the next region becomes highlighted. In addition, the sequential illumination of the lighting system 10 can be continuously repeated until the turn signal of the vehicle returns to the neutral position. It should be understood that the above example is not limiting, and that any desired illumination pattern can be used for a variety of vehicle-related conditions without departing from the teachings provided herein.

[0065] The embodiment illustrated in FIG. 5A can also be used in conjunction with the vehicle's on-board global positioning system (GPS). For example, if the vehicle 14 has a desired location, the GPS can illuminate portions of the light source 52 to notify the driver of a recommended change in the direction of the vehicle 14 by using a backlight pattern (eg, backlighting multiple portions in sequence). It will be appreciated that the light generating unit 60 may be used to provide any desired driver notification in conjunction with another system in the vehicle 14. For example, the lighting system 10 may also be used by a reversing assist and reversing assistance system with a vehicle trailer. means for notifying the driver of a recommended rotational change in the position of the steering wheel 16. In addition, a plurality of portions (e.g. 54a, 54b, 54c, 54d, 54e (FIG. 5A)) may partially or completely surround the periphery of the rim 24 and may indicate the recommended amount of rotation to the driver based on the number of areas and / or the intensity of the illuminated areas around the rim 24. More specifically, if the driver is to turn the steering wheel 16 ninety degrees clockwise, a quarter of the rim 24 may be illuminated, thereby indicating the amount of rotation. Additionally, each area may become unlit as the steering wheel 16 is rotated, thereby indicating a decrease in the amount of rotation required to reach the original desired angle. It is also contemplated that the symbol 56 (eg arrows) may be located on any component of the steering wheel 16 and may contain a photoluminescent material 96 or be illuminated by a light generating unit 60 so that additional information can be provided to the driver of the vehicle 14.

[0066] With reference to FIG. 5B illustrates an illumination system 10 in the form of a fuel meter 140 that correlates with the proportion of fuel in the fuel tank of the vehicle 14. When the amount of fuel in the vehicle 14 is consumed, the sections 58a, 58b, 58c, 58d, 58e of the light source 52 may become unlit.

[0067] In some embodiments, the light production assembly 60 may also illuminate some or all of its portions when vehicle 14 detects a problem with a specific portion of vehicle 14. For example, when fuel is consumed past a predetermined portion, a portion of the light production assembly 60 may flash so that the driver can recognize the required action. Exemplary problems that the warning light can cause include low tire pressure, low oil pressure, low battery and / or any other system malfunction on board the vehicle 14.

[0068] In an alternative embodiment, vehicle 14 may be equipped with a heated and / or cooled steering wheel 16 as is known in the art. The lighting system 10 may be configured to illuminate in a first color (eg, blue) when the steering wheel 16 is cooled. Likewise, the steering wheel 16 may be configured to be illuminated in a second color (eg, red) when the steering wheel 16 heats up.

[0069] With reference to FIG. 6, a first photoluminescent structure 62 is disposed on a light generating unit 60, and a second photoluminescent structure 132 is disposed on an element 148 of a vehicle 14, such as a portion of an instrument panel 28 and / or an instrument panel 18. As described above, a portion of a light generating unit 60 having a photoluminescent structure 62 converts incoming light 100 to outgoing light 102 of a different wavelength. The second portion of the light generating assembly 60 emits incoming light 100, which is further converted by the second photoluminescent structure 132 on the dashboard 28 into outgoing light 102 of a different wavelength. The outgoing light 102 can be used as an encounter / sequential light, a common light to illuminate any interior element 148 of the vehicle 14, and / or a signal indicator.

[0070] Also with reference to FIG. 6, on two opposite sides of the rim 24, there may be two light-generating units 60, which may be formed in one piece as a single component or separately attached to the rim 24. The first light-generating unit 60 has a photoluminescent structure 62 thereon to emit converted light towards the driver of the vehicle 14. The second light generating unit 60 may be located on the front portion of the rim 24 in the vehicle. The first part of the light emitted from the second light production unit 60 may be converted by the photoluminescent structure 62 thereon, thereby providing general light and / or illumination of the steering wheel 16. The second part of the light emitted from the second light production unit 60 may be directed to the element 148 in forward of the vehicle from the steering wheel 16 having a second photoluminescent structure 62 thereon, such as a dashboard portion 28. The second photoluminescent structure 132 may be illuminated in response to incoming light 100 emitted from the second light generating unit 60 in response to predetermined conditions as described here. Accordingly, the light source 52 may have a first bend substantially corresponding to the radius of the rim 24 and a second lateral bend substantially corresponding to the cross-sectional shape of the base 48 defining the rim 24.

[0071] As illustrated in FIG. 6, the light production assembly 60 may be affixed, attached, and / or molded onto the top surface of the rim 24. Thus, the light production assembly 60 may be flush with the top surface of the rim 24, thereby partially hiding from the driver's view when unlit. In one embodiment, the lighting system 10 and / or one or more of its components has a soft comfortable shell both to protect the lighting system 10 and to limit flexion of portions of the lighting system 10. Exemplary materials that may be used include, but are not limited to, polyvinyl chloride, vulcanized thermoplastic elastomer and polyester elastomer.

[0072] It is contemplated that in use, the second photoluminescent structure 132 in the vicinity of the lighting system 10 may be located in any desired location and not limited to the dash 28. For example, the second photoluminescent structure 132 may be located on the headrest and configured to illuminate a portion thereof under conditions low illumination. Additionally, the second photoluminescent structure 132 may also provide safety benefits such as notifying an incoming driver and / or passenger of certain items 148 in vehicle 14.

[0073] With reference to FIG. 7 illustrates an alternative embodiment of the lighting system 10. As illustrated, the photoluminescent structure 62 is located on the rim 24 of the steering wheel 16. The light source 52 is separated and located in a portion of the vehicle cab. For example, the light source 52 may be located in the A-pillar 136 of the vehicle 14 or the skin 138 of the vehicle 14. However, it should be understood that the light source 52 can be located anywhere such that the light source 52 can be directed towards the node 12 steering wheel. The incoming light 100 may be of a first wavelength that is capable of exciting the photoluminescent structure 62 on the rim 24. In response, the photoluminescent structure 62 may illuminate at a second wavelength of the outgoing light 102. In some embodiments, a plurality of photoluminescent materials 96 may be disposed on the rim 24, which are capable of backlighting in a wide range of colors such that a single multi-wavelength light source 52 can be capable of illuminating the rim 24 in a plurality of colors.

[0074] With reference to FIG. 8 generally shows a schematic diagram of a vehicle 14 on which a lighting system 10 is implemented. The lighting system 10 includes a controller 78 in communication with a light source 52. The controller 78 may include a memory 142 having instructions contained therein, which are executed by the processor 144 of the controller 78. The controller 78 may provide power to the light source 52 or the corresponding bus 82, 84 via a power supply 80 located on board the vehicle 14. B additionally, controller 78 may be configured to control incoming light 100 emitted from each light source 52 based on feedback received from one or more vehicle control modules 146, such as, but not limited to, body control module, module engine control module, steering control module, brake control module, etc., or a combination thereof. By controlling the incoming light 100 emitted from the light source 52, the lighting system 10 may be illuminated in a variety of colors and / or patterns to provide an aesthetic appearance, or may provide vehicle information to an intended observer. For example, when the lighting system 10 is illuminated, the lighting system 10 may notify the driver and / or passenger of the vehicle 14 of a certain condition of the vehicle 14.

[0075] In operation, the photoluminescent structure 62 may exhibit intermittent monochrome or multi-color illumination. For example, the controller 78 may cause the light source 52 to periodically emit only the first wavelength of the incoming light 100 through the LED sources 72 to cause the photoluminescent structure 62 to be periodically illuminated with the first color. Alternatively, the controller 78 may cause the light source 52 to periodically emit only the second wavelength of the incoming light 100 through the LED sources 72 to cause the photoluminescent portion to periodically illuminate with a second color. Alternatively, the controller 78 may cause the light source 52 to simultaneously and periodically emit light of the first and second wavelengths to cause the photoluminescent structure 62 to periodically illuminate with a third color formed by an additive mixture of the first and second color light. Still alternatively, the controller 78 may cause the light source 52 to alternate between periodically emitting the first and second wavelengths of the incoming light 100 to cause the photoluminescent structure 62 to periodically illuminate by alternating between the first and second colors. The controller 78 may cause the light source 52 to periodically emit the first and / or second wavelengths of incoming light at a regular time interval and / or an irregular time interval.

[0076] In another embodiment, the lighting system 10 may include a user interface 134. The user interface 134 may be configured such that a user can control the wavelength of the incoming light 100, which is emitted by the LED sources 72 and / or the LED sources 72, which are highlighted. Such a configuration may allow a user to control which items 148 (FIG. 6) are illuminated (eg, general light, signal indicator, turn signal, etc.).

[0077] With respect to the above-described examples, the controller 78 may convert the intensity of the emitted first and second wavelengths of the incoming light 100 by pulse width modulation or current control. In some embodiments, the controller 78 may be configured to adjust the color of the emitted light by sending control signals to adjust the intensity or energy output level of the light source 52. For example, if the light source 52 is configured to output the first radiation at a low level, substantially all of the first radiation can be converted to the second radiation. In this configuration, the color of the light corresponding to the second radiation may correspond to the color of the emitted light from the lighting system 10. If the light source 52 is configured to output the first radiation at a high level, only a portion of the first radiation can be converted to the second radiation. In this configuration, the color of light corresponding to the mixture of the first radiation and the second radiation can be outputted as the emitted light. Thus, each of the controllers 78 can control the output color of the emitted light.

[0078] Although a low level and a high level of intensity are considered with reference to the emission of the incoming light 100, it should be understood that the intensity of the first emission of the incoming light 100 can be varied between multiple intensity levels to adjust the color hue corresponding to the emitted light from the lighting system 10. Intensity difference can be changed manually or changed automatically by the controller 78 based on predetermined conditions. In one embodiment, the first intensity can be output from the lighting system 10 when the light sensor detects daylight conditions. The second intensity may be output from the lighting system 10 when the light sensor determines that the vehicle 14 is operating in a low light environment.

[0079] As described herein, the color of the outgoing light 102 can be significantly dependent on the particular photoluminescent material 96 used in the photoluminescent structure 62. Additionally, the converting ability of the photoluminescent structure 62 can be significantly dependent on the concentration of the photoluminescent material 96 used in the photoluminescent structure 62. By adjusting the range intensities that can be output from the light source 52, the concentration, types and proportions of the photoluminescent materials 96 in the photoluminescent structure 62 discussed here can be selected to create a range of color tints of the emitted light by mixing the first radiation with the second radiation.

[0080] Accordingly, herein is preferably provided a lighting system using a steering wheel assembly. The steering wheel assembly maintains its structural properties while providing fluorescent light with both functional and decorative characteristics. In some embodiments, the light source may have a thin structure, thereby facilitating the installation of the light source in small spaces to accommodate a vehicle 14 where conventional light sources cannot be practiced.

[0081] A person skilled in the art will understand that the construction of the described invention and other components is not limited to any particular material. Other exemplary embodiments of the invention disclosed herein can be made from a wide variety of materials, unless otherwise described herein.

[0082] For purposes of description, the expression "connected" (in all its forms: connect, connect, connected, etc.) generally means the connection of two components (electrical or mechanical) directly or indirectly with each other. Such a connection can be fixed or movable in nature. Such a connection can be achieved with two components (electrical or mechanical) and any additional intermediate elements formed in one piece in one piece with each other or with these two components. Such a connection may be permanent in nature, or it may be removable or detachable, unless otherwise noted.

[0083] It is also important to note that the structure and arrangement of elements of the invention, as shown in the exemplary embodiments, are illustrative only. Although only a few variations of the present invention are described in detail in this disclosure, it will be understood by those skilled in the art who studies this disclosure that many transformations are also possible (e.g., changes in dimensions, dimensions, designs, shapes and proportions of various elements, parameter values, layouts , use of materials, colors, orientations, etc.) without significant deviation from the new ideas and advantages of the given object. For example, elements shown as one piece may be formed from multiple parts, or elements shown as multiple pieces may be formed as one piece, the operation of interfaces may be reversed or otherwise changed, the length or width of structures, and / or the elements, or connectors, or other elements of the system can be changed, the nature or number of adjustment positions provided between the elements can be changed. It should be noted that the elements and / or assemblies of the system can be made from any of a wide variety of materials that provide sufficient strength or durability, in any of a wide variety of colors, textures and combinations. Accordingly, all such transformations are intended to be included within the scope of the present invention. Other substitutions, conversions, changes, and exceptions may be made in the design, operating conditions and layouts of the preferred and other exemplary embodiments without departing from the spirit of the present invention.

[0084] It should be understood that any described processes or steps in the described processes may be combined with other disclosed processes or steps to form structures within the scope of the present invention. The exemplary designs and processes disclosed herein are for illustrative purposes and should not be construed as limiting.

[0085] It should also be understood that changes and transformations may be made in the above structures and methods without deviating from the teachings of the present invention, and it should further be understood that such concepts are intended to be covered by the following claims, unless the claims are formulated explicitly indicate otherwise.

Claims (29)

1. A lighting system for a vehicle steering wheel assembly, comprising: a light source having a plurality of independently illuminated portions located around the circumference of the steering wheel; and a first photoluminescent structure disposed on the light source and configured to luminesce in response to excitation by the light source, the light source progressively illuminating adjacent areas to notify the driver of the suggested steering direction. 2. The lighting system of claim 1, wherein the light source comprises a plurality of printed light emitting diodes. 3. The lighting system of claim 2, wherein the first photoluminescent structure comprises at least one photoluminescent material configured to convert incoming light received from at least a portion of the light source into visible light that is output to the visible portion. 4. The lighting system of claim 3, wherein the incoming light comprises one of blue light, violet light, and ultraviolet light. 5. The lighting system of claim 1, further comprising: a second photoluminescent structure separated from the steering wheel. 6. The lighting system of claim 1, further comprising a controller for controlling an activation state of the light source in response to at least one vehicle-related condition. 7. The lighting system of claim. 1, wherein the light source interacts with the global positioning system to indicate to the driver to change the orientation of the steering wheel. 8. Lighting system for a vehicle steering wheel assembly, comprising: a steering wheel having a central hub and a rim connected to the hub by means of a spoke; a light generating unit located on the rim and having a plurality of independently illuminated portions, the independently illuminated portions including different concentrations of light sources; a first luminescent structure located on the steering wheel and configured to luminesce in response to excitation by at least a portion of the light generating unit. 9. The lighting system of claim 8, wherein the light generating unit comprises a printed light emitting diode. 10. The lighting system of claim 8, wherein the light generating unit is configured to notify the driver of the recommended amount of rotation based on the portion of the rim that is illuminated. 11. The lighting system of claim 9, wherein the luminescent structure comprises at least one luminescent material configured to convert incoming light received from at least a portion of the printed light emitting diode into visible light that is output to the visible portion. 12. The lighting system of claim 8, further comprising: a second luminescent structure separated from the rim. 13. The lighting system of claim 12, wherein the first luminescent structure is illuminated with a first color and the second luminescent structure is illuminated with a second color. 14. The lighting system of claim 8, wherein the light-generating assembly has a first bend substantially corresponding to the radius of the rim and a second lateral bend substantially corresponding to the cross-sectional shape of the base forming the rim. 15. Lighting system for the vehicle steering wheel assembly, comprising: a light source located on the steering wheel and configured to direct light in two opposite directions from the steering wheel; a first photoluminescent structure disposed on a steering wheel, the first photoluminescent structure being configured to luminesce in response to excitation by light from a light source; and a second photoluminescent structure located on a vehicle component separate from the steering wheel assembly. 16. The lighting system of claim 15, wherein the light source comprises a plurality of printed light emitting diodes. 17. The lighting system of claim 16, wherein the first photoluminescent structure comprises at least one photoluminescent material configured to down-convert incoming light received from at least a portion of the light source into visible light that is output to the visible portion. 18. The lighting system of claim 17, wherein the incoming light comprises one of blue light, violet light, and ultraviolet light. 19. The lighting system of claim 15, wherein the light source has a first bend substantially corresponding to the radius of the steering wheel rim and a second lateral bend substantially corresponding to the cross-sectional shape of the base forming the steering wheel rim. 20. The lighting system of claim 15, wherein the light source is configured to notify the driver of the recommended amount of rotation based on the portion of the steering wheel rim that is illuminated.

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