WO2024100125A1 - Luminous device for a motor vehicle - Google Patents

Luminous device for a motor vehicle Download PDF

Info

Publication number
WO2024100125A1
WO2024100125A1 PCT/EP2023/081168 EP2023081168W WO2024100125A1 WO 2024100125 A1 WO2024100125 A1 WO 2024100125A1 EP 2023081168 W EP2023081168 W EP 2023081168W WO 2024100125 A1 WO2024100125 A1 WO 2024100125A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
deflecting element
light deflecting
atleast
pattern
Prior art date
Application number
PCT/EP2023/081168
Other languages
French (fr)
Inventor
Santhosh PARATHASARATHY
Pechimuthu PATTU
Etienne SILL
Original Assignee
Valeo Vision
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Valeo Vision filed Critical Valeo Vision
Publication of WO2024100125A1 publication Critical patent/WO2024100125A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/26—Refractors, transparent cover plates, light guides or filters not provided in groups F21S43/235 - F21S43/255
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/10—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source
    • F21S43/13—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source characterised by the type of light source
    • F21S43/14—Light emitting diodes [LED]
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/0006—Arrays
    • G02B3/0037—Arrays characterized by the distribution or form of lenses
    • G02B3/005—Arrays characterized by the distribution or form of lenses arranged along a single direction only, e.g. lenticular sheets
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/0006—Arrays
    • G02B3/0037—Arrays characterized by the distribution or form of lenses
    • G02B3/0062—Stacked lens arrays, i.e. refractive surfaces arranged in at least two planes, without structurally separate optical elements in-between
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
    • G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
    • G02B30/26—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type
    • G02B30/27—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type involving lenticular arrays
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/50—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by aesthetic components not otherwise provided for, e.g. decorative trim, partition walls or covers

Definitions

  • TITLE LUMINOUS DEVICE FOR A MOTOR VEHICLE TECHNICAL FIELD
  • the present invention relates to a luminous device for a motor vehicle, and more particularly to a luminous device having a first light deflecting element, a pattern, and a second light deflecting element arranged to provide a desired effect.
  • Luminous devices of a motor vehicle includes various lighting and/or indicating devices, such as a headlight, fog light, turn light, brake light, position light, daytime running light and the like.
  • the various luminous devices may be utilized for different purposes of the motor vehicle such as illuminating a road, illuminating interior of the vehicle, providing aesthetic appearance for the motor vehicle, and the like.
  • innovative luminous devices that provide a unique lighting effect such as personalized signature lighting, unique lighting patterns and the like.
  • considerations have to be made to increase efficiency of light and to reduce dark spots and hot spots in light output.
  • the luminous devices such as a headlamp of the motor vehicle may use a diffuser to spread atleast a portion of light from the light source to enhance visibility.
  • the luminous devices using the diffusers are not efficient when designed to produce unique lighting effect such as for example dynamic optical effect, light pattern, and the like.
  • the diffuser sheet must be joined or bonded with another component such as an inner lens or an outer lens for proper functioning.
  • the joint or the bond of the diffuser may wear out and may cause reduction in optical efficiency.
  • the light output may not be efficient and may have hot spots.
  • the cost and complexity of design is also increased.
  • the present invention provides a luminous device that is capable of changing direction of light thereby providing a desired unique lighting effect.
  • the present invention relates to a luminous device for a motor vehicle.
  • the luminous device comprising a light source configured to emit a light beam, a first light deflecting element comprising a plurality of convex elements wherein the convex elements are arranged horizontally in front of the light source such that direction of the light beam from the light source is changed by the first deflecting element.
  • the luminous device further comprises a second light deflecting element comprising a plurality of convex elements wherein the convex elements are arranged vertically in front of the first light deflecting element such that the second light deflecting element is adapted to receive light emitted from the first light deflecting element.
  • the second light deflecting element is configured to change direction of the light received from the first deflecting element.
  • the arrangement of the first deflecting element and the second light deflecting element enables the luminous device to change direction of light thereby providing a unique lighting effect at the output.
  • the device further comprises a reflector adapted to receive the light beam from the light source and reflect the light beam towards the first light deflecting element.
  • the atleast one pattern comprises a two dimensional image with a plurality of transparent and opaque portions.
  • the altleast one pattern is formed on atleast a portion of a light receiving side of the second light deflecting element.
  • the atleast one pattern is formed by a coating process that comprises coating a black paint and removing atleast a portion of the black paint from the second light deflecting element by laser to form the transparent portion.
  • the second light deflecting element is arranged at distance equal to or less than a radius of the convex element of the first light deflecting element.
  • the device comprises an outer lens arranged in front of the second light deflecting element.
  • the light source is a light emitting diode.
  • the light source is mounted on a Printed Circuit Board (PCB).
  • PCB Printed Circuit Board
  • a vehicle lighting apparatus such as a headlamp, a front lighting bar, a rear lamp, comprising the luminous device.
  • the device being arranged such that the light it emits goes out of the vehicle lighting apparatus through the outer lens and the patterns are visible through the outer lens.
  • Figure 1 shows a sectional view of luminous device in a direct lighting arrangement, according to an embodiment of the present invention.
  • Figure 2 shows a path of light rays in first light deflecting element and second light deflecting element, according to an embodiment of the present invention.
  • Fig. 3a shows atleast one pattern formed on the second light deflecting element, according to an embodiment of the present invention.
  • Fig. 3b shows an example of atleast one three dimensional pattern formed by the coating process, according to an embodiment of the present invention.
  • Figure 4 shows cross sectional view of the luminous device in an indirect lighting arrangement, according to an embodiment of the present invention.
  • Luminous devices of automotive vehicles are designed to perform more functions in addition to illuminating a road.
  • the luminous devices are designed to provide different lighting effects such as pattern lighting, three dimensional lighting and the like.
  • the arrangement of the luminous device ensures that a desired three dimensional pattern is produced as output light without the need for a separate diffusing element. Further, the arrangement reduces cost and increases optical efficiency of the light at output.
  • Figure 1 shows a sectional view of luminous device 100 for a motor vehicle in a direct lighting arrangement, according to an embodiment of the present invention.
  • the motor vehicles are generally provided with a right side luminous device and a left side luminous device.
  • the luminous devices are placed symmetrically to each other and operate synchronously to produce the overall beam pattern or beam output.
  • the present invention is being explained with respect to a single luminous device. It should be understood that the invention is applicable to both the luminous device and as well as to other lighting functions of the automotive vehicle such as tail lamp, direction indicator light, fog lamp etc.
  • the luminous device 100 comprises a light source 102 configured to emit a light beam.
  • the light source 102 maybe a solid state lighting element such as a light emitting diode (LED).
  • the luminous device 100 comprises a first light deflecting element 104, a second light deflecting element 108, and atleast one pattern 110.
  • the first light deflecting element 104 comprises a plurality of convex elements 106.
  • the convex elements 106 maybe arranged horizontally in front of the light source 102 such that direction of the light beam from the light source 102 is changed by the first light deflecting element 104.
  • the second light deflecting element 108 comprises a plurality of convex elements 112.
  • the convex elements 112 may be arranged vertically in front of the first light deflecting element 104 such that the second light deflecting element 108 is adapted to receive light emitted from the first light deflecting element 104.
  • plurality of convex elements 112 of the second light deflecting element 108 is arranged in an orientation opposite to the plurality of convex elements 106 of the first light deflecting element 104.
  • the second light deflecting element 108 is configured to change direction of the light received from the first deflecting element 104.
  • the atleast one pattern 110 is provided between the first light defecting element 104 and the second light deflecting element 108.
  • the atleast one pattern 110 comprises a two dimensional image with a plurality of transparent 114 and opaque portions 116.
  • the atleast one pattern 110 maybe formed on atleast a portion of a light receiving side 118 of the second light deflecting element 108.
  • the device 100 may further comprise a reflector 120 configured to reflect light from the light source 102.
  • the light source 102 may be mounted on a Printed Circuit Board (PCB) 122.
  • the light source 102 emits the light rays that may be reflected by the reflector 120.
  • the light rays from the light source 102 may directly pass through the first light deflecting element 104 without being reflected by the reflector 120.
  • the path taken by the light rays in the luminous device 100 is explained with reference to FIG. 2.
  • Figure 2 shows a path of light rays in first light deflecting element 104 and second light deflecting element 108, according to an embodiment of the present invention.
  • the first light deflecting element 104 is arranged in front of the light source
  • the second light deflecting element 108 is arranged in front of the first light deflecting element 104.
  • the second light deflecting element is arranged at distance equal to or less than a radius of the convex element 106 of the first light deflecting element 104.
  • the light source 102 mounted on the PCB 122 emits the light rays. The light emitted from the light source 102 passes through the first light deflecting element 104.
  • the first light deflecting element 104 comprises the plurality of convex elements 106 that are arranged horizontally in front of the light source 102 as shown in FIG.2.
  • the plurality of convex elements 106 of the first light deflecting element 104 is configured to change direction of the light rays emitted from the light source 102. As can be seen from the figure, the direction of light rays exiting the first light deflecting element 104 is different from the light rays entering the first light deflecting element 104. Subsequently, the light rays pass through the second light deflecting element 108.
  • the second light deflecting element 108 comprises the plurality of convex elements 112 that are arranged vertically in front of the first deflecting element 104.
  • the plurality of convex elements 122 of the second light deflecting element 108 enables the second light deflecting element 108 to change direction of the light rays.
  • the vertical arrangement of the plurality of convex elements 122 ensures that atleast one pattern may be formed on the second light deflecting element 108. The Formation and working of the atleast one pattern is explained in detail with respect to Fig.3.
  • Fig. 3a shows atleast one pattern formed on the second light deflecting element 108, according to an embodiment of the present invention.
  • the atleast one pattern 302 may be formed on atleast one portion of the second light deflecting element 108.
  • the atleast one pattern 302 is formed by a coating process that comprises coating a paint on the second light deflecting element 108.
  • the color of the paint maybe black, red, amber or any other color that ensures opacity.
  • the process comprises removing atleast a portion of the paint from the second light deflecting element 108 by laser to form the transparent portion of a two dimensional images A and B as shown in Figure 3b.
  • Fig. 3a shows atleast one pattern formed on the second light deflecting element 108, according to an embodiment of the present invention.
  • the atleast one pattern 302 may be formed on atleast one portion of the second light deflecting element 108.
  • the atleast one pattern 302 is formed by a coating process that
  • the atleast one pattern 302 comprises two dimensional images with a plurality of transparent and opaque portions.
  • the paterns are formed on a light receiving side of the second light deflecting element.
  • the atleast one pattern arranged on atleast one portion of the second light deflecting element 108 ensures that a three dimensional effect is obtained at the output of the second light deflecting element 108.
  • the two dimensional images A and B of figure 3b maybe independently obtained and a pattern maybe formed on the second light deflecting element 108 as shown in figure 3 a.
  • the arrangement of the plurality of convex element 122 of the second light deflecting element 108 ensures the direction of the light rays are changed such that a three dimensional effect is obtained.
  • the three dimensional effect obtained maybe a combination of two independent two dimensional images A+B as shown in figure3b.
  • the plurality of convex elements 106 of the first light deflecting element 104 and the plurality of convex elements 122 of the second light deflecting element 108 may be a plurality of lenticular lenses.
  • the lenticular lens is adapted to refract the light beam from the light source 102.
  • the light beam may be refracted at different angles by the lenticular lens such that different images are provided as output at different angles.
  • the atleast one pattern 302 having a two dimensional images Al, and Bl may be formed by coating process at the light receiving side 118 of the second light deflecting element 106.
  • the images Al, and Bl may be formed behind a single convex element of the plurality of convex elements 122 of the second light deflecting element 108.
  • the images A2, and B2, A3, and B3 maybe formed behind single convex elements respectively.
  • the light beam entering the first light deflecting element 104 is refracted by the plurality of convex elements 106 at different angles.
  • the light beam at that exits the first light deflecting element 104 may be orthogonal with respect to the light beam entering the first light deflecting element 104.
  • the refracted light beam passes through the transparent portions of the atleast one pattern 302 for example Al, Bl, A2, B2, and A3, B3 before entering the second light deflecting element 108.
  • the refracted light beam passing through the opaque portions of the atleast one pattern maybe reflected back or absorbed depending on the type of paint coated to form the atleast one pattern 302.
  • the light beam that exits the atleast one patern 302 may enter the second light deflecting element 108.
  • the light beam entering the plurality of convex elements 122 of the second light deflecting element 108 may be refracted again before exiting the luminous device 100.
  • FIG. 4 shows cross sectional view of the luminous device 400 in an indirect lighting arrangement, according to an embodiment of the present invention.
  • the luminous device 400 comprises a light source 402 configured to emit a light beam.
  • the light source 402 is mounted on a PCB 418.
  • the luminous device comprises a reflector 404 that is adapted to receive the light beam from the light source 402.
  • the reflector 404 may reflect the received light beam towards a first light deflecting element 406.
  • the light source 402 mounted on the PCB 418 is arranged such that the light beam emitted from the light source 402 is first reflected by the reflector 404 to reach the first light deflecting element 406.
  • the PCB 418 may be arranged perpendicular to the first light deflecting element 406.
  • the first light deflecting element 406 may comprise a plurality of convex elements 414.
  • the plurality of convex elements 414 are arranged horizontally in front of the light source 402 such that direction of the light beam is changed by the first light deflecting element 406.
  • the luminous device 400 comprises a second light deflecting element 408 arranged in front of the first light deflecting element 406.
  • the luminous device 400 further comprises atleast one pattern 410 disposed between the first light deflecting element 406 and the second light deflecting element 408.
  • the atleast one pattern 410 maybe formed on atleast one portion of the second light deflecting element 408.
  • the atleast one pattern 410 may comprise a plurality of opaque portions 422 and a plurality of transparent portions 420.
  • the light beam exiting from the first deflecting portion 406 may pass through the plurality of transparent portions 420 of the atleast one pattern 410. Subsequently, the light beam from the atleast one pattern 410 may enter into the second light deflecting portion 408.
  • the second light deflecting element 408 may comprise a plurality of convex elements 416 arranged vertically in front of the first light deflecting element 406. The plurality of convex elements 416 ensures that the direction of the light beam that is received from the first light deflecting element 406 via the atleast one pattern 410 is changed.
  • the luminous device 400 further comprises an outer lens 412 arranged in front of the second light deflecting element 408.
  • the light emitted by the second light deflecting portion 408 may pass through the outer lens 412.
  • the outer lens 412 may also function as a cover for all other remaining components of the luminous device 400.
  • the luminous device 400 may be a vehicle lighting apparatus such as a headlamp, a front lighting bar, a rear lamp and the like. The device 400 being arranged such that the light it emits goes out of the vehicle lighting apparatus through the outer lens 412 and the patterns are visible through the outer lens 412.

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

The present invention pertains to a luminous device (100) for an automotive vehicle. The device comprising a light source, a first light deflecting element comprising a plurality of convex elements, and a second light deflecting element comprising a plurality of convex elements. The plurality of convex elements of the first light deflecting element are arranged horizontally in front of the light source such that direction of a light beam from the light source is changed. The plurality of convex elements of the second light deflecting element are arranged vertically in front of the first light deflecting element such that the second light deflecting element is configured to change direction of the light received from the first deflecting element.

Description

TITLE: LUMINOUS DEVICE FOR A MOTOR VEHICLE TECHNICAL FIELD
[0001] The present invention relates to a luminous device for a motor vehicle, and more particularly to a luminous device having a first light deflecting element, a pattern, and a second light deflecting element arranged to provide a desired effect.
STATE OF THE ART
[0002] Luminous devices of a motor vehicle includes various lighting and/or indicating devices, such as a headlight, fog light, turn light, brake light, position light, daytime running light and the like. The various luminous devices may be utilized for different purposes of the motor vehicle such as illuminating a road, illuminating interior of the vehicle, providing aesthetic appearance for the motor vehicle, and the like. With advancements in automotive industry, more importance is given to designing innovative luminous devices that provide a unique lighting effect such as personalized signature lighting, unique lighting patterns and the like. However, when designing such luminous devices to provide a unique lighting effect, considerations have to be made to increase efficiency of light and to reduce dark spots and hot spots in light output.
[0003] Conventionally, the luminous devices such as a headlamp of the motor vehicle may use a diffuser to spread atleast a portion of light from the light source to enhance visibility. However, the luminous devices using the diffusers are not efficient when designed to produce unique lighting effect such as for example dynamic optical effect, light pattern, and the like. Further, the diffuser sheet must be joined or bonded with another component such as an inner lens or an outer lens for proper functioning. However, the joint or the bond of the diffuser may wear out and may cause reduction in optical efficiency. In addition, the light output may not be efficient and may have hot spots. Moreover, the cost and complexity of design is also increased.
[0004] The prior art and the conventional methods have various disadvantages as described earlier and there is a need for a luminous device that can overcome the disadvantages of the conventional method.
SUMMARY OF THE INVENTION
[0005] In order to at least partially overcome the drawbacks in the prior art, the present invention provides a luminous device that is capable of changing direction of light thereby providing a desired unique lighting effect.
[0006] The present invention relates to a luminous device for a motor vehicle. The luminous device comprising a light source configured to emit a light beam, a first light deflecting element comprising a plurality of convex elements wherein the convex elements are arranged horizontally in front of the light source such that direction of the light beam from the light source is changed by the first deflecting element. The luminous device further comprises a second light deflecting element comprising a plurality of convex elements wherein the convex elements are arranged vertically in front of the first light deflecting element such that the second light deflecting element is adapted to receive light emitted from the first light deflecting element. The second light deflecting element is configured to change direction of the light received from the first deflecting element.
[0007] The arrangement of the first deflecting element and the second light deflecting element enables the luminous device to change direction of light thereby providing a unique lighting effect at the output.
[0008] The present invention can incorporate one or several embodiments presented hereafter. However these embodiments are optional.
[0009] In an embodiment of the present invention, atleast one pattern is provided between the first light defecting element and the second light deflecting element. [0010] In an embodiment of the present invention, the device further comprises a reflector adapted to receive the light beam from the light source and reflect the light beam towards the first light deflecting element.
[0011] In an embodiment of the present invention, the atleast one pattern comprises a two dimensional image with a plurality of transparent and opaque portions.
[0012] In an embodiment of the present invention, the altleast one pattern is formed on atleast a portion of a light receiving side of the second light deflecting element.
[0013] In an embodiment of the present invention, the atleast one pattern is formed by a coating process that comprises coating a black paint and removing atleast a portion of the black paint from the second light deflecting element by laser to form the transparent portion.
[0014] In an embodiment of the present invention, the second light deflecting element is arranged at distance equal to or less than a radius of the convex element of the first light deflecting element.
[0015] In an embodiment of the present invention, the device comprises an outer lens arranged in front of the second light deflecting element.
[0016] In an embodiment of the present invention, the light source is a light emitting diode. [0017] In an embodiment of the present invention, the light source is mounted on a Printed Circuit Board (PCB).
[0018] In an embodiment of the present invention, a vehicle lighting apparatus, such as a headlamp, a front lighting bar, a rear lamp, comprising the luminous device is provided. The device being arranged such that the light it emits goes out of the vehicle lighting apparatus through the outer lens and the patterns are visible through the outer lens.
BRIEF DESCRIPTION OF THE INVENTION
[0019] To complete the description and to provide a better understanding of the invention, a set of drawings is provided. Said drawings form an integral part of the description and illustrate an embodiment of the invention, which should not be construed as restricting the scope of the invention, but only as an example of how the invention can be carried out. The drawings comprise the following characteristics.
[0020] Figure 1 shows a sectional view of luminous device in a direct lighting arrangement, according to an embodiment of the present invention.
[0021] Figure 2 shows a path of light rays in first light deflecting element and second light deflecting element, according to an embodiment of the present invention.
[0022] Fig. 3a shows atleast one pattern formed on the second light deflecting element, according to an embodiment of the present invention.
[0023] Fig. 3b shows an example of atleast one three dimensional pattern formed by the coating process, according to an embodiment of the present invention.
[0024] Figure 4 shows cross sectional view of the luminous device in an indirect lighting arrangement, according to an embodiment of the present invention.
DETAILED DESCRIPTION OF THE INVENTION
[0025] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
[0026] Luminous devices of automotive vehicles are designed to perform more functions in addition to illuminating a road. The luminous devices are designed to provide different lighting effects such as pattern lighting, three dimensional lighting and the like. The arrangement of the luminous device ensures that a desired three dimensional pattern is produced as output light without the need for a separate diffusing element. Further, the arrangement reduces cost and increases optical efficiency of the light at output. [0027] Figure 1 shows a sectional view of luminous device 100 for a motor vehicle in a direct lighting arrangement, according to an embodiment of the present invention. The motor vehicles are generally provided with a right side luminous device and a left side luminous device. The luminous devices are placed symmetrically to each other and operate synchronously to produce the overall beam pattern or beam output. For ease of understanding the present invention is being explained with respect to a single luminous device. It should be understood that the invention is applicable to both the luminous device and as well as to other lighting functions of the automotive vehicle such as tail lamp, direction indicator light, fog lamp etc.
[0028] The luminous device 100 comprises a light source 102 configured to emit a light beam. In an embodiment, the light source 102 maybe a solid state lighting element such as a light emitting diode (LED). The luminous device 100 comprises a first light deflecting element 104, a second light deflecting element 108, and atleast one pattern 110. The first light deflecting element 104 comprises a plurality of convex elements 106. The convex elements 106 maybe arranged horizontally in front of the light source 102 such that direction of the light beam from the light source 102 is changed by the first light deflecting element 104. The second light deflecting element 108 comprises a plurality of convex elements 112. The convex elements 112 may be arranged vertically in front of the first light deflecting element 104 such that the second light deflecting element 108 is adapted to receive light emitted from the first light deflecting element 104. In an embodiment, plurality of convex elements 112 of the second light deflecting element 108 is arranged in an orientation opposite to the plurality of convex elements 106 of the first light deflecting element 104. The second light deflecting element 108 is configured to change direction of the light received from the first deflecting element 104. The atleast one pattern 110 is provided between the first light defecting element 104 and the second light deflecting element 108. The atleast one pattern 110 comprises a two dimensional image with a plurality of transparent 114 and opaque portions 116. The atleast one pattern 110 maybe formed on atleast a portion of a light receiving side 118 of the second light deflecting element 108. The device 100 may further comprise a reflector 120 configured to reflect light from the light source 102. The light source 102 may be mounted on a Printed Circuit Board (PCB) 122. The light source 102 emits the light rays that may be reflected by the reflector 120. In an embodiment, the light rays from the light source 102 may directly pass through the first light deflecting element 104 without being reflected by the reflector 120. The path taken by the light rays in the luminous device 100 is explained with reference to FIG. 2.
[0029] Figure 2 shows a path of light rays in first light deflecting element 104 and second light deflecting element 108, according to an embodiment of the present invention. As can be seen, the first light deflecting element 104 is arranged in front of the light source, and the second light deflecting element 108 is arranged in front of the first light deflecting element 104. The second light deflecting element is arranged at distance equal to or less than a radius of the convex element 106 of the first light deflecting element 104. The light source 102 mounted on the PCB 122 emits the light rays. The light emitted from the light source 102 passes through the first light deflecting element 104. The first light deflecting element 104 comprises the plurality of convex elements 106 that are arranged horizontally in front of the light source 102 as shown in FIG.2. The plurality of convex elements 106 of the first light deflecting element 104 is configured to change direction of the light rays emitted from the light source 102. As can be seen from the figure, the direction of light rays exiting the first light deflecting element 104 is different from the light rays entering the first light deflecting element 104. Subsequently, the light rays pass through the second light deflecting element 108. The second light deflecting element 108 comprises the plurality of convex elements 112 that are arranged vertically in front of the first deflecting element 104. The plurality of convex elements 122 of the second light deflecting element 108 enables the second light deflecting element 108 to change direction of the light rays. In an embodiment, the vertical arrangement of the plurality of convex elements 122 ensures that atleast one pattern may be formed on the second light deflecting element 108. The Formation and working of the atleast one pattern is explained in detail with respect to Fig.3.
[0030] Fig. 3a shows atleast one pattern formed on the second light deflecting element 108, according to an embodiment of the present invention. The atleast one pattern 302 may be formed on atleast one portion of the second light deflecting element 108. The atleast one pattern 302 is formed by a coating process that comprises coating a paint on the second light deflecting element 108. In an embodiment, the color of the paint maybe black, red, amber or any other color that ensures opacity. Subsequently, the process comprises removing atleast a portion of the paint from the second light deflecting element 108 by laser to form the transparent portion of a two dimensional images A and B as shown in Figure 3b. As can be seen from Fig. 3a, the atleast one pattern 302 comprises two dimensional images with a plurality of transparent and opaque portions. The paterns are formed on a light receiving side of the second light deflecting element. The atleast one pattern arranged on atleast one portion of the second light deflecting element 108 ensures that a three dimensional effect is obtained at the output of the second light deflecting element 108. For example, the two dimensional images A and B of figure 3b maybe independently obtained and a pattern maybe formed on the second light deflecting element 108 as shown in figure 3 a. The arrangement of the plurality of convex element 122 of the second light deflecting element 108 ensures the direction of the light rays are changed such that a three dimensional effect is obtained. In an embodiment, the three dimensional effect obtained maybe a combination of two independent two dimensional images A+B as shown in figure3b.
[0031] In an embodiment, the plurality of convex elements 106 of the first light deflecting element 104 and the plurality of convex elements 122 of the second light deflecting element 108 may be a plurality of lenticular lenses. The lenticular lens is adapted to refract the light beam from the light source 102. The light beam may be refracted at different angles by the lenticular lens such that different images are provided as output at different angles. In an example embodiment, the atleast one pattern 302 having a two dimensional images Al, and Bl may be formed by coating process at the light receiving side 118 of the second light deflecting element 106. Particularly, the images Al, and Bl may be formed behind a single convex element of the plurality of convex elements 122 of the second light deflecting element 108. Similarly, the images A2, and B2, A3, and B3 maybe formed behind single convex elements respectively. The light beam entering the first light deflecting element 104 is refracted by the plurality of convex elements 106 at different angles. In an embodiment, the light beam at that exits the first light deflecting element 104 may be orthogonal with respect to the light beam entering the first light deflecting element 104. Subsequently, the refracted light beam passes through the transparent portions of the atleast one pattern 302 for example Al, Bl, A2, B2, and A3, B3 before entering the second light deflecting element 108. The refracted light beam passing through the opaque portions of the atleast one pattern maybe reflected back or absorbed depending on the type of paint coated to form the atleast one pattern 302. Finally, the light beam that exits the atleast one patern 302 may enter the second light deflecting element 108. The light beam entering the plurality of convex elements 122 of the second light deflecting element 108 may be refracted again before exiting the luminous device 100. Thus, different patterns such as Al, Bl, A2, B2, may be visible at different angles when viewed by an observer from outside. Therefore, a unique lighting effect with different images may be produced by the luminous device 100. The effect is not limited to direct lighting arrangement and may also be obtained by an indirect lighting arrangement as explained in figure 4.
[0032] Figure 4 shows cross sectional view of the luminous device 400 in an indirect lighting arrangement, according to an embodiment of the present invention. The luminous device 400 comprises a light source 402 configured to emit a light beam. The light source 402 is mounted on a PCB 418. The luminous device comprises a reflector 404 that is adapted to receive the light beam from the light source 402. The reflector 404 may reflect the received light beam towards a first light deflecting element 406. The light source 402 mounted on the PCB 418 is arranged such that the light beam emitted from the light source 402 is first reflected by the reflector 404 to reach the first light deflecting element 406. In an embodiment, the PCB 418 may be arranged perpendicular to the first light deflecting element 406. The first light deflecting element 406 may comprise a plurality of convex elements 414. The plurality of convex elements 414 are arranged horizontally in front of the light source 402 such that direction of the light beam is changed by the first light deflecting element 406. The luminous device 400 comprises a second light deflecting element 408 arranged in front of the first light deflecting element 406. The luminous device 400 further comprises atleast one pattern 410 disposed between the first light deflecting element 406 and the second light deflecting element 408. The atleast one pattern 410 maybe formed on atleast one portion of the second light deflecting element 408. The atleast one pattern 410 may comprise a plurality of opaque portions 422 and a plurality of transparent portions 420. The light beam exiting from the first deflecting portion 406 may pass through the plurality of transparent portions 420 of the atleast one pattern 410. Subsequently, the light beam from the atleast one pattern 410 may enter into the second light deflecting portion 408. The second light deflecting element 408 may comprise a plurality of convex elements 416 arranged vertically in front of the first light deflecting element 406. The plurality of convex elements 416 ensures that the direction of the light beam that is received from the first light deflecting element 406 via the atleast one pattern 410 is changed.
Therefore, a unique lighting effect may be obtained as an output from the second light deflecting element 408. In an embodiment, the luminous device 400 further comprises an outer lens 412 arranged in front of the second light deflecting element 408. The light emitted by the second light deflecting portion 408 may pass through the outer lens 412. In addition to transmitting the light beam, the outer lens 412 may also function as a cover for all other remaining components of the luminous device 400. In an embodiment, the luminous device 400 may be a vehicle lighting apparatus such as a headlamp, a front lighting bar, a rear lamp and the like. The device 400 being arranged such that the light it emits goes out of the vehicle lighting apparatus through the outer lens 412 and the patterns are visible through the outer lens 412.
[0033] Although the present disclosure provides references to figures, all embodiments shown in the figures are intended to explain preferred embodiments of the present invention by way of example rather than being intended to limit the present invention. Preferred embodiments of the present invention have been disclosed. However, it should be apparent to a person of ordinary skill in the art that certain modifications would come within the teachings of this invention and that various changes or modifications may be made in the present disclosure without departing from the principles and spirit of the disclosure, which are intended to be covered by the present invention as long as these changes or modifications fall within the scope defined in the claims and their equivalents.
LIST OF REFERENCE SIGNS
[0034] 100 - Luminous Device
[0035] 102 - Light Source
[0036] 104 - First Light Deflecting element
[0037] 106 - Plurality of Convex Elements of the First Light Deflecting Element [0038] 108 - Second Light Deflecting Element [0039] 110 - Atleast one Pattern
[0040] 112 - Plurality Of Convex Elements of the Second Convex Elements
[0041] 114 - Transparent Portion
[0042] 116 - Opaque Portion
[0043] 118 - Light Receiving Side
[0044] 120 - Reflector
[0045] 122 - Printed Circuit Board
[0046] 302 - Atleast one Pattern
[0047] 400 - Luminous Device
[0048] 402 - Light Source
[0049] 404 - Reflector
[0050] 406 - First Light Deflecting Element
[0051] 408 - Second Light Deflecting Element [0052] 410 - At least one Pattern
[0053] 412 - Outer Lens
[0054] 414 - Plurality of Convex Elements of the First Light Deflecting Element
[0055] 416 - Plurality of Convex Elements of the Second Light Deflecting Element
[0056] 418 - Printed Circuit Board
[0057] 420 - Transparent Portion
[0058] 422 - Opaque Portion

Claims

Claims
[Claim 1] Aluminous device for a motor vehicle, the device comprising: a light source configured to emit a light beam; a first light deflecting element comprising a plurality of convex elements wherein the convex elements are arranged horizontally in front of the light source such that direction of the light beam from the light source is changed by the first light deflecting element; and a second light deflecting element comprising a plurality of convex elements wherein the convex elements are arranged vertically in front of the first light deflecting element such that the second light deflecting element is adapted to receive light emitted from the first light deflecting element, wherein the second light deflecting element is configured to change direction of the light received from the first deflecting element.
[Claim 2] The device according to claim 1, wherein atleast one pattern is provided between the first light deflecting element and the second light deflecting element
[Claim 3] The device according to claim 1, wherein the device further comprises a reflector adapted to receive the light beam from the light source and reflect the light beam towards the first light deflecting element.
[Claim 4] The device according to claim 2, wherein the atleast one pattern comprises a two dimensional image with a plurality of transparent and opaque portions.
[Claim 5] The device according to claim 4, wherein the altleast one pattern is formed on atleast a portion of a light receiving side of the second light deflecting element.
[Claim 6] The device according to claim 5, wherein the atleast one pattern is formed by a coating process that comprises coating a paint and removing atleast a portion of the paint from the second light deflecting element by laser to form the transparent portion.
[Claim 7] The device according to claim 1, wherein the second light deflecting element is arranged at distance equal to or less than a radius of the convex element of the first light deflecting element.
[Claim 8] The device according to claim 1, wherein the device comprises an outer lens arranged in front of the second light deflecting element.
[Claim 9] The device according to claim 1, wherein the light source is a light emitting diode.
[Claim 10] The device according to claim 1, wherein the light source is mounted on a Printed Circuit Board (PCB).
[Claim 11] A vehicle lighting apparatus, such as a headlamp, a front lighting bar, a rear lamp, comprising the luminous device according to any one of claims 1 to 10, the device being arranged such that the light it emits goes out of the vehicle lighting apparatus through the outer lens and the patterns are visible through the outer lens.
PCT/EP2023/081168 2022-11-10 2023-11-08 Luminous device for a motor vehicle WO2024100125A1 (en)

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0764812A1 (en) * 1995-09-19 1997-03-26 Valeo Vision Motor vehicle signal light appearing as being deep
KR20160049726A (en) * 2014-10-28 2016-05-10 에스엘 주식회사 Stereoscopic nearing warning image display device
US20160320627A1 (en) * 2015-04-30 2016-11-03 Yicheng Precision Inc. Lamp providing different light patterns to different view angles
KR20160136900A (en) * 2015-05-21 2016-11-30 에스엘 주식회사 A lamp for vehicle
WO2021078915A1 (en) * 2019-10-24 2021-04-29 Valeo Vision Grating structure, optical structure and corresponding vehicle lamp and vehicle
EP3324103B1 (en) * 2016-11-22 2021-06-16 odelo GmbH Vehicle lamp with an illuminating function having an effect of depth
EP3169547B1 (en) * 2014-07-15 2022-01-26 Lumileds LLC Vehicle lighting module
US20220290835A1 (en) * 2015-05-22 2022-09-15 Flex-N-Gate Advanced Product Development, Llc Lit image projection lamp and assemblies and methods to use the same to generate three-dimensional images

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0764812A1 (en) * 1995-09-19 1997-03-26 Valeo Vision Motor vehicle signal light appearing as being deep
EP3169547B1 (en) * 2014-07-15 2022-01-26 Lumileds LLC Vehicle lighting module
KR20160049726A (en) * 2014-10-28 2016-05-10 에스엘 주식회사 Stereoscopic nearing warning image display device
US20160320627A1 (en) * 2015-04-30 2016-11-03 Yicheng Precision Inc. Lamp providing different light patterns to different view angles
KR20160136900A (en) * 2015-05-21 2016-11-30 에스엘 주식회사 A lamp for vehicle
US20220290835A1 (en) * 2015-05-22 2022-09-15 Flex-N-Gate Advanced Product Development, Llc Lit image projection lamp and assemblies and methods to use the same to generate three-dimensional images
EP3324103B1 (en) * 2016-11-22 2021-06-16 odelo GmbH Vehicle lamp with an illuminating function having an effect of depth
WO2021078915A1 (en) * 2019-10-24 2021-04-29 Valeo Vision Grating structure, optical structure and corresponding vehicle lamp and vehicle

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