FIELD OF INVENTION
[0001] The present invention relates to a lighting system of a vehicle, in
particular, a projection lighting system.
BACKGROUND
[0002] A lighting system is an integral part of any vehicle. The lighting system,
not only, provides a functional requirement for the vehicle but also provides an aesthetical appeal that governs the success in the market. In the present market scenario, the projected lighting system, particularly headlights, is gaining popularity. This projected lighting system has a pleasing appearance as it is provided with a particular light source. The light source used, in this type of the projected lighting system, is Light Emitting Diodes (LEDs). Due the incorporation of LEDs, color of the light emitted from the lighting system is perceived differently from a standard lamp having a bulb as the light source. Therefore, such lighting system is perceived to be pleasing to a consumer of the vehicle. In addition, the projected lighting system has a better luminance and sharpness versus any other standard lamp (bulb based lighting system).
[0003] However, the conventional projection lighting system involving LEDs
has issues related to thermal dissipation that influences color of the light emitted from the lighting system and thus, reducing efficiency of the projection lighting system. Further, the projection system also involves various other challenges like an installation space requirement, and a huge cost of manufacturing and development.
[0004] Furthermore, the conventional projection system also has an automated
shielding element for achieving a cut-off line to distinguish between the high beam and the low beam configuration of the lighting system. This shielding element, not only, increases the size of the lighting system but only increases the cost of the lighting system. Moreover, this shielding element also produces an undesired violet colored light and this undesired violet light is disturbing for coming vehicles. Additionally,

with this shielding element, functioning of the lighting system becomes complex and thereby, desired efficiency of the lighting system is not achieved.
[0005] A patent reference US20140362572A1 discloses a complex headlamp
lighting system. This particular headlamp comprises a LED light source assembly, reflecting members having a high beam reflector and a low beam reflector, and a lens. The lens is assembled only in front of the high beam reflector of the reflecting member. In practice, for a projection based lighting system comprises a lens system, the focal point of the lighting system has to be defined. This is added limitation of the projector based lighting system and complicates the design of the projector based lighting system.
[0006] Thus, to overcome all the above problems or may be some of the
problems and the present invention aims at developing an improved lighting system for the vehicle.
SUMMARY OF THE INVENTION
[0007] This Summary is provided to introduce a selection of concepts in a
simplified form that are further described below in the Detailed Description. This Summary is not intended to identify key or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.
[0008] In one aspect of the present invention, a lighting device of a vehicle is
disclosed. The lighting device comprises a substrate a plurality light sources mounted on the substrate for emitting light, wherein the plurality light sources comprises at least two low beam light sources and at least one high beam source, and the plurality light sources are arranged on a horizontal plane (H) along a width direction (Y-axis) of the vehicle; and a reflector assembly mounted on the substrate and rearward to the plurality light sources, wherein the reflector assembly comprises at least two low beam reflector corresponding to the at least two low beam light sources and at least one high beam reflector corresponding to the at least one high beam sources.

[0009] In an embodiment, the reflector assembly is an integrated structure to
combine the at least two low beam reflector and the at least one high beam reflector.
[00010] In an embodiment, the plurality light sources are arranged on the upper surface of the substrate.
[00011] In an embodiment, the high beam light source is placed slightly rearward of the at least two low beam light sources.
[00012] In an embodiment, the lighting device of the vehicle further comprising a lens, wherein the lens is disposed in front the lighting sources and the reflector assembly.
[00013] In an embodiment, the lens is selected from a group consisting of a plano-convex lens, a biconvex lens, a Fresnel lens, a spherical lens, an aspherical lens or a rectangular lens or any of their combination thereof.
[00014] In an embodiment, the lens is a D-shaped lens.
[00015] In an embodiment, the low beam reflectors configured with a curvature that is different than a curvature of the high beam reflector.
[00016] In an embodiment, the low beam reflector is configured with a first specified contour mesh for reflecting light beams and the high beam reflector is configured with a second specified contour mesh for reflecting light beams, wherein the first specified contour mesh is different than the second specified contour mesh.
[00017] In an embodiment, the curvature associated with the low beam reflectors is more than the curvature of the high beam reflector.
[00018] Generally, conventional Bi-LED projection systems are associated with many challenges such as cost, design, space and heat. The present lighting device is designed in such a simpler way that the high beam reflector, the low beam reflectors, and the number of light sources are combined uniquely to remove the complex

structure like shielding element. Moreover, due to removal of the shielding element, the violet color light coming out of the lighting device is also eliminated and thereby, efficiency of the present lighting device is increased.
[00019] Further, the present invention of the lighting device provides the high (HB) and low beams (LB) using the single lens, that is, also without using the shielding element. Thus, the present lighting device arrangement is simpler than the conventional lighting device.
[00020] Furthermore, all the lighting sources including the low beam light sources and the high beam light source are placed on the horizontal plane (H) which optimizes the space constraint associated with implementation of the lighting system inside the small accommodation housing. Additionally, the rear portion is inclined to the front portion of the substrate makes the present lighting device reduced in size so that the present lighting device is accommodated in a space constraint housing structure of the saddle ridden vehicle.
BRIEF DESCRIPTION OF DRAWINGS
[00021] The invention itself, together with further features and attended advantages, will become apparent from consideration of the following detailed description, taken in conjunction with the accompanying drawings. One or more embodiments of the present invention are now described, by way of example only wherein like reference numerals represent like elements and in which:
[00022] Figure 1 illustrates a side view of an exemplary vehicle, according to an embodiment of the present invention;
[00023] Figure 2 illustrates a lighting device in a top view of the vehicle, according to an embodiment of the present invention;
[00024] Figure 2A illustrates a lighting device in a perspective view of the vehicle, according to another embodiment of the present invention;

[00025] Figure 3 A illustrates a front view of the reflectors for the lighting device comprising at least two low beam reflectors and at least one high beam reflector, according to an embodiment of the present invention;
[00026] Figure 3B illustrates a perspective view of the reflectors for the lighting device comprising the at least two low beam reflectors and the at least one high beam reflector, according to an embodiment of the present invention;
[00027] Figure 4A illustrates a low beam light emitting from the lighting device, according to an embodiment of the present invention;
[00028] Figure 4B illustrates a high beam light emitting from the lighting device, according to an embodiment of the present invention;
[00029] Figure 5 illustrates an exploded view of the lighting system, according to an embodiment of the present invention; and
[00030] Figure 6 illustrates the lighting system, according to an embodiment of the present invention.
[00031] The drawings referred to in this description are not to be understood as being drawn to scale except if specifically noted, and such drawings are only exemplary in nature.
DETAILED DESCRIPTION
[00032] While the invention is susceptible to various modifications and alternative forms, an embodiment thereof has been shown by way of example in the drawings and will be described here below. It should be understood, however that it is not intended to limit the invention to the particular forms disclosed, but on the contrary, the invention is to cover all modifications, equivalents, and alternative falling within the spirit and the scope of the invention.

[00033] The term "comprises", comprising, or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a setup, structure or method that comprises a list of components or steps does not include only those components or steps but may include other components or steps not expressly listed or inherent to such setup or structure or method. In other words, one or more elements in a system or apparatus proceeded by "comprises... a" does not, without more constraints, preclude the existence of other elements or additional elements in the system or apparatus.
[00034] For better understanding of this invention, reference would now be made to the embodiment illustrated in the accompanying Figures and description here below, further, in the following Figures, the same reference numerals are used to identify the same components in various views.
[00035] While the present invention is illustrated in the context of a vehicle, however, lighting system of the vehicle and aspects and features thereof can be used with other type of vehicles as well. The terms "vehicle", "two wheeled vehicle" and "motorcycle" have been interchangeably used throughout the description. The term "vehicle" comprises vehicles such as motorcycles, scooters, bicycles, mopeds, scooter type vehicle, all-terrain vehicles (ATV) and the like.
[00036] The terms "front / forward", "rear / rearward / back / backward", "up / upper / top", "down / lower / lower ward / downward, bottom", "left / leftward", "right / rightward" used therein represents the directions as seen from a vehicle driver sitting astride and these directions are referred by arrows Fr, Rr, U, Lr, L, R in the drawing Figures. A co-ordinate system is also depicts in the various figures of the present disclosure. The X-axis represents a lengthwise direction (Fr-Rr), Y-axis represents a width direction (L-R) and Z-axis represents a height direction (U-Lr) of the vehicle.
[00037] Referring to Figure 1, a vehicle (100) according to an embodiment of the present invention is depicted. The vehicle (100) referred to herein, embodies a motorized scooter vehicle. Alternatively, the vehicle (100) may embody any other

ridden vehicles such as motorcycles, all-terrain vehicles (ATV) etc. without limiting the scope of the invention.
[00038] The vehicle (100) comprises a front end structure (102), a rear end
structure (104), and a footboard (106). The front end structure (102) forms the front portion of the vehicle (100). The rear end structure (104) forms the rear portion of the vehicle (100). The footboard (106) lies between the front portion (102) and the rear portion (104). The footboard (106) provides foot rest for a rider riding the vehicle (100).
[00039] The front end structure (102) comprises a front ground engaging member
(114), and a steering mechanism (116). The front ground engaging member (114) is operatively connected to the steering mechanism (116). The steering mechanism (116) comprises a handle bar (118). The handle bar (118) is configured to be rotated by the rider to steer the vehicle (100). Further, the front end structure (102) comprises a leg shield (120). The leg shield (120) encloses the steering mechanism (116). The leg shield (120) comprises an inner leg shield (122) and an outer leg shield (121). The leg shield (120) provides protection for the feet of the rider of the vehicle (100).
[00040] The front end structure (102) also comprises a dash assembly (125), and
a lighting system (200). The dash assembly (125) comprises a display unit (not shown in Figure. 1)). The display unit displays information about the vehicle (100) to the rider. The dash assembly (125) may comprise additional components such as GPS navigation, indication lights and Graphical User Interface (GUI) etc. without limiting the scope of the invention. The lighting system (200) is a headlight assembly of the vehicle (100) to illuminate a front direction of the vehicle (100). Further, the front end structure (102) may further comprise additional components such as mirrors, front fenders etc. without limiting the scope of the invention.
[00041] Referring again to Figure 1, the rear end structure (104) comprises a seat (108), a rear ground engaging member (112), and an engine (113). The seat (108) provides seating for a rider and a passenger of the vehicle (100). The rear ground

engaging member (112) underlies the seat (108) and is driven by the engine (113). A power unit (202, refer figure 2) configured with the engine (113). In an embodiment, the power unit (202) is an alternator configured with the engine (113) of the vehicle (100). In an embodiment, the alternator is a current producing device configured to provide current to the electrical loads.
[00042] Referring yet again to Figure 1, the rear end structure (104) comprises a storage box (not shown). The storage box is provided under the seat (108). More particularly, the storage box is disposed within a space defined by the seat (108) and the engine (113) of power unit (110). Further, the rear end structure (104) may comprise additional components such as suspension system/s, tail light/s etc. without limiting the scope of the invention.
[00043] Figure 2 illustrates the lighting device (200) in a top view of the vehicle (100), according to an embodiment of the present invention. Figure 2A illustrates the lighting device (200) in a perspective view of the vehicle (100), according to an embodiment of the present invention. The lighting device (200) comprises a plurality of light sources (202a, 202b, 202c), a reflector assembly (300) comprising at least two low beam reflector (204a, 204b) and at least one high beam reflector (204c), a lens (208) and a substrate (206). The present invention relates to the lighting device (200). This lighting device (200) is a projector based lighting system having a D-lens (208) to project the emitted light from the light sources (202a, 202b, 202c) in a forward direction of the vehicle (100) and may also be referred as a "Bi-LED" headlight system.
[00044] The plurality of light sources (202a, 202b, 202c) are mounted on an upper
surface (206a) of the substrate (206), preferably at a front portion (240) of the substrate (206). The plurality of light sources (202a, 202b, 202c) comprises at least two low beam light sources (202a, 202b) and at least one high beam light source (202c). These plurality of light sources (202a, 202b, 202c) are configured on a horizontal plane (H) and along a width direction (y- direction) of the vehicle (100). The high beam light source (202c) is placed slightly rearward of the at least two low beam light sources

(202a, 202b). The plurality of light sources (202a, 202b, 202c) are arranged such that each reflector (204a, 204b, 204c) in the reflector assembly (300) has an assigned light source (202a, 202b, 202c). For example, the low beam light source (202a) has its own reflector (204a). Similarly, the high beam light source (202c) has its own reflector (204c). The position of the light sources (202a, 202b, 202c) is also defined with respect to the reflector assembly (300). It is to be noted that the defined position of the light sources (202a, 202b, 202c) with respect to the reflector assembly (300) may be changed to maintain a desired focal point for the lens to project light beams.
[00045] In an embodiment, the low beam light sources (202a, 202b) may remain always ON, whereas the high beam light source (202c) may be switched ON by a headlight switch.
[00046] In an embodiment, the plurality of light sources (202a, 202b, 202c) may be a single-chip LED or a multi-chip LED. In another embodiment, the single-chip LED and the multi-chip LED may also be combined to achieve the desired light emission for the plurality of light sources (202a, 202b, 202c). In an embodiment, the plurality of light sources (202a, 202b, 202c) may be a white colored LED or a multi¬colored LED.
[00047] The lighting device (200) also comprises the lens (208). The lens (208)
disposed in front the lighting sources (202a, 202b, 202c) and the reflector assembly (300). The lens (208) focuses the light beams (LB, HB) reflected by the reflector assembly (300). In an embodiment, the lens (208) is selected from a group consisting of a plano-convex lens, a biconvex lens, a Fresnel lens or any combination thereof. In another embodiment, the lens (208) may be a spherical lens, an aspherical lens or a rectangular lens.
[00048] Figure 3 A illustrates a front view of the reflector assembly (300) for the lighting device (200) comprising at least two low beam reflectors (204a, 204b) and at least one high beam reflector (204c), according to an embodiment of the present invention. Figure 3B illustrates a perspective view of the reflector assembly (300) for

the lighting device (300) comprising the at least two low beam reflectors (204a, 204b) and the at least one high beam reflector (204c), according to an embodiment of the present invention. The reflector assembly (300) is mounted on the upper surface (206a) of the substrate (206) and behind the plurality light sources (202a, 202b, 202c). In an embodiment, the reflector assembly (300) is disposed on the front portion (204) of the substrate (206). The at least two low beam reflectors (204a, 204b) having the reflecting surfaces facing the corresponding the at least two low beam light sources (202a, 202b). Similarly, the at least one high beam reflector (204c) has a reflecting surface facing the corresponding at least one high beam light sources (202c).
[00049] In an embodiment, a curvature of the low beam reflectors (204a, 204b) is different than a curvature of the high beam reflector (204c). In another embodiment, the curvature associated with the low beam reflectors (204a, 204b) is more than the curvature of the high beam reflector (204c). In another embodiment, the low beam reflectors (204a, 204b) is configured with a first specified contour mesh for reflecting light beams (LB) and the high beam reflector (204c) is configured with a second specified contour mesh for reflecting light beams (HB), wherein the first specified contour mesh is different than the second specified contour mesh.
[00050] Figure 3B illustrates a horizontal plane (H) along the Y-axis which is the width direction. As described above, the plurality of light sources (202a, 202b, 202c) are configured on a horizontal plane (H) and along a width direction (y- direction) of the vehicle (100).
[00051] It is also be noted that, in the present invention, the positions of the low beam light sources (202a, 202b) and the high beam light sources (202c) may also be interchanged. Additionally, there may also be two high beam reflectors (204c) and one low beam reflectors (204a, 204b). Therefore, the light sources and the reflectors may be changed based on the requirement of the desired output from the lighting device (200). Also, a single light source may correspond to the multiple reflectors or a multiple light sources may correspond to the single reflector to achieve the desired outcome from the lighting device (200). Thus, the present arrangement of the light

sources and the reflectors may have any combination and may also be scaled based on the requirement. The arrangement or combination of the light sources (202a, 202b, 202c) and the reflectors (204a, 204b, 204c) are not restricted and limited.
[00052] Figure 4A illustrates the low beam light emitting from the low beam light sources (202a, 202b) reflected by the low beam reflectors (204a, 204b), according to an embodiment of the present invention. Similarly, Figure 4B illustrates a high beam light emitting from the high beam light source (202c) reflected by the high beam reflector (204c), according to an embodiment of the present invention. High light beams (HB) from the high beam light source (202c) are reflected by the high beam reflector (204c) toward a far region relative to the vehicle (100). Inversely, low light beams (LB) from the low beam light sources (202a, 202b) are reflected by the low beam reflectors (204a, 204b) toward a close region relative to the vehicle (100).
[00053] Referring again to Figure 2A, when the low beam light sources (202a, 202b) and the high beam light source (202c) are simultaneously turned ON, the light beams (LB) from low beam light sources (202a, 202b) are reflected toward the close region relative to the vehicle (100) and simultaneously, the light beams (HB) from the high beam light source (202c) are reflected toward the far region relative to the vehicle (100). Therefore, the close region and the far region are simultaneously illuminated in front of the vehicle, in accordance with the present invention.
[00054] Figure 5 illustrates an exploded view of the lighting system (200), according to an embodiment of the present invention. The substrate (206) comprises the upper surface (206a) and the bottom surface (206b). The upper surface (206) is disposed with the lighting sources (202a, 202b, 202c) and the reflector assembly (300). The upper surface also accommodated an electronic circuitry (not shown) which drives the lighting device (200). The bottom surface (206b) is configured with a heat sink (210) to dissipate heat produced from the lighting sources (202a, 202b, 202c) and the electronic circuitry disposed on the upper surface (206a). In an embodiment, the heat sink (210) may be integrally formed on the bottom surface (206b) of the substrate (206). In another embodiment, the heat sink (210) may involve a plurality of fins

disposed on the bottom surface (206b) of the substrate (206). The lighting device (200) also comprises a bezel (212) and an outer lens (214). In another embodiment, the heat sink (210) may be provided on the entire length of the bottom surface (206b) of the substrate. Thus, the lighting device (200) has an adequate cooling.
[00055] The substrate (206) also comprises a front portion (240) and a rear
portion (220). In an embodiment, the rear portion (220) is inclined upwardly with respect to the front portion of the substrate (206). This helps in saving a space while accommodating the lighting device (200) in a small housing (402, refer Figure 6). This also helps in increasing heat dissipation through the heat sink (210).
[00056] Generally, conventional Bi-LED projection systems are associated with
many challenges such as cost, design, space and heat. The present lighting device (200) is designed in such a simpler way that the high beam reflector (204c), the low beam reflectors (204a, 204b), and the number of light sources (202a, 202b, 202c) are combined uniquely to remove the complex structure like shielding element. Moreover, due to removal of the shielding element, the violet color light coming out of the lighting device (200) is also eliminated and thereby, efficiency of the present lighting device (200) is increased.
[00057] Further, the present invention of the lighting device (200) provides the high (HB) and low beams (LB) using the single lens (208), that is, also without using the shielding element. Thus, the present lighting device (200) arrangement is simpler than the conventional lighting device.
[00058] Furthermore, all the lighting sources (202a, 202b, 202c) including the low beam light sources (202a, 202b) and the high beam light source (202c) are placed on the horizontal plane (H) which optimizes the space constraint associated with implementation of the lighting system (400) inside the small accommodation housing (402). Additionally, the rear portion (220) is inclined to the front portion (204) of the substrate (206) makes the present lighting device (200) reduced in size so that the

present lighting device (200) is accommodated in a space constraint housing structure (402) of the saddle ridden vehicle (100).
[00059] The invention can be affected by external influences such as installation space and design. However, it is to be understood that the intent is not to limit the invention to the particular forms disclosed, but on the contrary, to cover all modifications, equivalents and alternatives that fall within the spirit and scope of the invention.
[00060] While few embodiments of the present invention have been described above, it is to be understood that the invention is not limited to the above embodiments and modifications may be appropriately made thereto within the spirit and scope of the invention.
[00061] While considerable emphasis has been placed herein on the particular features of this invention, it will be appreciated that various modifications can be made, and that many changes can be made in the preferred embodiments without departing from the principles of the invention. These and other modifications in the nature of the invention or the preferred embodiments will be apparent to those skilled in the art from the disclosure herein, whereby it is to be distinctly understood that the foregoing descriptive matter is to be interpreted merely as illustrative of the invention and not as a limitation.

CLAIM:
1. A lighting device (200) of a vehicle (100), the lighting device (200) comprising:
a substrate (206);
a plurality light sources (202a, 202b, 202c) mounted on the substrate (206)
for emitting light, wherein
o the plurality light sources (202a, 202b, 202c) comprises at least two
low beam light sources (202a, 202b) and at least one high beam
source (202c), and o the plurality light sources (202a, 202b, 202c) are arranged on a
horizontal plane (H) along a width direction (Y-axis) of the vehicle
(100); and a reflector assembly (300) mounted on the substrate and rearward to the plurality light sources (202a, 202b, 202c), wherein
o the reflector assembly (300) comprises at least two low beam
reflector (204a, 204b) corresponding to the at least two low beam
light sources (202a, 202b) and at least one high beam reflector (204c)
corresponding to the at least one high beam sources (202c).
2. The lighting device (200) of the vehicle (100) as claimed in claim 1, wherein the reflector assembly (300) is an integrated structure to combine the at least two low beam reflector (204a, 204b) and the at least one high beam reflector (204c).
3. The lighting device (200) of the vehicle (100) as claimed in claim 2, wherein the plurality light sources (202a, 202b, 202c) are arranged on the upper surface (206a) of the substrate (206).
4. The lighting device (200) of the vehicle (100) as claimed in claim 1, wherein the high beam light source (202c) is placed slightly rearward of the at least two low beam light sources (202a, 202b).
5. The lighting device (200) of the vehicle (100) as claimed in claim 1, further comprising a lens (208), wherein the lens (208) is disposed in front the lighting sources (202a, 202b, 202c) and the reflector assembly (300).

6. The lighting device (200) of the vehicle (100) as claimed in claim 4, wherein the lens (208) is selected from a group consisting of a plano-convex lens, a biconvex lens, a Fresnel lens, a spherical lens, an aspherical lens or a rectangular lens or any of their combination thereof.
7. The lighting device (200) of the vehicle (100) as claimed in claim 4, wherein the lens (208) is a D-shaped lens.
8. The lighting device (200) of the vehicle (100) as claimed in claim 1, wherein the low beam reflectors (204a, 204b) configured with a curvature that is different than a curvature of the high beam reflector (204c).
9. The lighting device (200) of the vehicle (100) as claimed in claim 1, wherein the low beam reflectors (204a, 204b) is configured with a first specified contour mesh for reflecting light beams and the high beam reflector (204c) is configured with a second specified contour mesh for reflecting light beams, wherein the first specified contour mesh is different than the second specified contour mesh.
10. The lighting device (200) of the vehicle (100) as claimed in claim 8, wherein the curvature associated with the low beam reflectors (204a, 204b) is more than the curvature of the high beam reflector (204c).