EP4384751A1 - Light guide, lighting device and vehicle - Google Patents

Light guide, lighting device and vehicle

Info

Publication number
EP4384751A1
EP4384751A1 EP22762081.2A EP22762081A EP4384751A1 EP 4384751 A1 EP4384751 A1 EP 4384751A1 EP 22762081 A EP22762081 A EP 22762081A EP 4384751 A1 EP4384751 A1 EP 4384751A1
Authority
EP
European Patent Office
Prior art keywords
light
guide
reflecting
rays
light guide
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
EP22762081.2A
Other languages
German (de)
French (fr)
Inventor
Chen Chen
Qiang Hu
Xizhou YUE
Huan Sun
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valeo Vision SAS
Original Assignee
Valeo Vision SAS
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 SAS filed Critical Valeo Vision SAS
Publication of EP4384751A1 publication Critical patent/EP4384751A1/en
Pending legal-status Critical Current

Links

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
    • F21S43/235—Light guides
    • F21S43/236—Light guides characterised by the shape of the light guide
    • F21S43/239—Light guides characterised by the shape of the light guide plate-shaped
    • 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]
    • 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
    • F21S43/235—Light guides
    • F21S43/242—Light guides characterised by the emission area
    • F21S43/243—Light guides characterised by the emission area emitting light from one or more of its extremities
    • 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
    • F21S43/235—Light guides
    • F21S43/249—Light guides with two or more light sources being coupled into the light guide

Definitions

  • the present invention relates to the technical field of vehicle lamps, in particular to a light guide, a lighting device and a vehicle.
  • Lighting devices can provide light for illumination and/or signalling, and are widely used in various fields; for example, vehicle lamps are used in motor vehicles to ensure safe travel. Types of vehicle lamps may include motor vehicle headlamps, fog lamps, tail lamps, daytime running lamps, turn signal lamps, brake lamps and side marker lamps, etc. Furthermore, light guides can efficiently conduct and control light, and are thus widely used by lighting devices.
  • an object of the present invention is to propose a light guide, a lighting device and a vehicle, which can at least partially solve the problems mentioned above.
  • a light guide comprising a first guide part, a light output part and a first reflecting part, wherein: the first guide part is formed at a side opposite a side where the light output part is located, and the first guide part guides light rays from a light source or light sources towards the first reflecting part and the light output part; the first reflecting part is formed between the first guide part and the light output part, and reflects a portion of light rays from the first guide part to the light output part ; the light output part outputs a first portion of light rays coming directly from the first guide part, and a second portion of light rays from the first reflecting part; and a reflection enhancement structure is formed on the light guide, to increase the amount of light in the second portion of light rays.
  • having the reflection enhancement structure formed on the light guide to increase the amount of light in the second portion of light rays enables an observer to observe a uniform light output effect at multiple positions where the observer is able to simultaneously receive light rays from the first reflecting part and light rays coming directly from the guide part.
  • the reflection enhancement structure is formed on at least one of the following: the first reflecting part; an auxiliary reflecting surface, formed between the first guide part and the light output part, and reflecting a portion of light rays from the first guide part to the first reflecting part.
  • the light guide is substantially in the form of a plate, and in a main output direction of the light guide, the first guide part is formed on a rear-side surface of the light guide, the light output part is formed on a front-side surface of the light guide, the first reflecting part is formed on a left-side and/or a right-side surface of the light guide, and the auxiliary reflecting surface comprises an upper-side surface and/or a lower-side surface of the light guide.
  • the reflection enhancement structure comprises at least one of the following structures: a reflective layer; a protrusion structure; a depression structure.
  • the reflection enhancement structure can increase the amount of light in the second portion of light rays, enabling an observer to observe a uniform light output effect at multiple positions where the observer is able to simultaneously receive light rays from the first reflecting part and light rays coming directly from the guide part.
  • the first guide part comprises multiple light entry parts, which face the light sources such that light rays from the light sources enter the light entry parts.
  • the first guide part comprises the light entry parts
  • light rays from the light sources can be guided directly to the first reflecting part and the light output part by means of the first guide part.
  • the light guide further comprises multiple light entry parts, and the first guide part comprises multiple second reflecting parts, wherein: the light entry part faces the light source or light sources, such that light rays from the light source or light sources enter the light entry part; at least one second reflecting part of the multiple second reflecting parts reflects light rays from the light entry part towards the first reflecting part and the light output part.
  • the first guide part comprises the second reflecting parts
  • light rays from the light sources are reflected at the first guide part and guided towards the first reflecting part and the light output part.
  • the multiple second reflecting parts are arranged in a stepped formation.
  • having the multiple second reflecting parts arranged in a stepped formation helps to achieve a uniform light output effect.
  • the second reflecting part comprises a reflecting face and a connecting face; the reflecting face reflects light rays from the light entry part towards the first reflecting part and the light output part, and the connecting face connects the reflecting faces of two adjacent second reflecting parts.
  • a reflection enhancement structure is formed on the connecting face, to reduce light leakage from the connecting face.
  • having the reflection enhancement structure arranged on the connecting face makes it possible to increase the reflection of light rays by the connecting face and thereby reduce light leakage.
  • the reflection enhancement structure comprises at least one of the following structures: a reflective layer; a protrusion structure; a depression structure.
  • having the reflection enhancement structure arranged on the connecting face makes it possible to increase the reflection of light rays by the connecting face and thereby reduce light leakage.
  • the light guide further comprises a second guide part and a third reflecting part, wherein the second guide part guides light rays from the light source towards the third reflecting part; the third reflecting part is formed between the second guide part and the first reflecting part, and guides light rays from the second guide part towards the first reflecting part and the light output part.
  • the configura ion of the second guide part and the third reflecting part helps to illuminate a corner region enclosed by the light output part and the first reflecting part.
  • the second guide part comprises a light entry part, wherein the light entry part faces the light source or light sources such that light rays from the light source or light sources enter the light entry part.
  • the second guide part comprises the light entry part
  • light rays from the light source can be guided towards the third reflecting part directly by means of the second guide part.
  • the light guide further comprises a light entry part
  • the second guide part comprises a fourth reflecting part, wherein: the light entry part faces the light source or light sources, such that light rays from the light source or light sources enter the light entry part; the fourth reflecting part reflects light rays from the light entry part towards the third reflecting part.
  • the second guide part comprises the fourth reflecting part
  • light rays from the light source are reflected at the second guide part and guided towards the third reflecting part.
  • the second guide part is located at a rear side of the first guide part in a light ray output direction of the light guide.
  • a lighting device comprising any one of the light guides described above; light source or light sources, which emits or emit light rays towards the light guide.
  • a vehicle comprising any one of the lighting devices described above.
  • FIG. 1 shows a top view of a lighting device 1 according to an embodiment of the present invention
  • FIG. 2 shows a front view of the lighting device 1 in FIG. 1;
  • FIG. 3 shows a top view of a light guide 10 according to an embodiment of the present invention
  • FIG. 4 shows a bottom view of the light guide 10 in Figure 3;
  • FIG. 5 shows a side view of the light guide 10 in Figure 3;
  • FIG. 6 shows another side view of the light guide 10 in Figure 3
  • FIG. 7 shows an optical path diagram indicating the paths of propagation of a portion of light rays in the light guide 10 in Figure 3.
  • FIG. 8 shows an optical path diagram indicating the paths of propagation of another portion of light rays in the light guide 10 in Figure 3.
  • the X-axis represents the longitudinal direction
  • the Y-axis represents the horizontal direction
  • the Z-axis represents the vertical direction.
  • “front” , “rear” , “left” and “right” all take the positive direction of the X-axis as a reference
  • “upper” and “lower” take the positive direction of the Z-axis as a reference.
  • Fig. 1 shows a top view of a lighting device 1 according to an embodiment of the present invention
  • Fig. 2 shows a front view of the lighting device 1 in Fig. 1.
  • the lighting device 1 comprises a light guide 10, and a light source 20 which emits light rays towards the light guide 10, wherein the light guide 10 is substantially in the form of a plate, and has a main output direction in the positive direction of the X-axis.
  • the light source 20 is arranged above the light guide 10, facing an upper-side surface 200 of the light guide 10, such that light rays from the light source 20 enter the light guide 10 from the upperside surface 200.
  • the light guide 10 further comprises a lug 100 for fixing the light guide 10 to another component (for example but not limited to a casing of the lighting device 1), and a mounting hole may be provided in the lug 100.
  • the light source 20 may comprise a through-hole or slot to make way for the lug 100.
  • the light source 20 may be arranged at another side of the light guide 10 and input light from another surface of the light guide 10; for example, but without limitation, the light source 20 is arranged at a rear side of the light guide 10, facing a rear-side surface of the light guide 10, such that light rays from the light source 20 enter the light guide 10 from the rear-side surface.
  • the light guide 10 may be made of a transparent material, for example but not limited to glass, resin or plastic material, etc. , wherein the plastic material may comprise PMMA (polymethyl methacrylate).
  • the light source 20 comprises a base plate 21, a base plate 22, and multiple light emitting devices 23 mounted on the base plates 21 and 22.
  • the base plates 21 and 22 are printed circuit boards, and the light emitting devices 23 are light emitting diodes.
  • the number of base plates is not limited to this, and can be set as required.
  • Fig. 3 shows a top view of a light guide 10 according to an embodiment of the present invention
  • Fig. 4 shows a bottom view of the light guide 10 in Fig. 3
  • Fig. 5 shows a side view of the light guide 10 in Fig. 3
  • Fig. 6 shows another side view of the light guide 10 in Fig. 3.
  • Figs. 3 shows a top view of a light guide 10 according to an embodiment of the present invention
  • Fig. 4 shows a bottom view of the light guide 10 in Fig. 3
  • Fig. 5 shows a side view of the light guide 10 in Fig. 3
  • Fig. 6 shows another side view of the light guide 10 in Fig. 3.
  • Figs. 3 shows a top view of a light guide 10 according to an embodiment of the present invention
  • Fig. 4 shows a bottom view of the light guide 10 in Fig. 3
  • Fig. 5 shows a side view of the light guide 10 in Fig. 3
  • Fig. 6 shows another side view of the light
  • the light guide 10 comprises a light output part 410 formed on a front-side surface 400, a first guide part formed on a rear-side surface 900 of the light guide 10, and a first reflecting part 510 which is formed between the light output part 410 and the first guide part, specifically on a rightside surface 500 of the light guide 10.
  • the first guide part can guide light rays entering the light guide 10 towards the first reflecting part 510 and the light output part 410, the first reflecting part 510 can reflect a portion of light rays from the first guide part to the light output part 410, and finally, the light output part 410 outputs a first portion of light rays coming directly from the first guide part, and outputs a second portion of light rays from the first reflecting part 510.
  • the light output part 410 may be part of the front-side surface 400, or may be a specific light output structure formed on the front-side surface 400; for example, as shown in Figs. 3 and 6, the light output part 410 may be optical protrusions formed on the front-side surface 400.
  • the first reflecting part 510 may be part of the right-side surface 500; thus, when light rays from the first guide part are incident on the first reflecting part 510, they are reflected.
  • the light guide 10 comprises multiple light entry parts 210 formed on the upper-side surface 200; these are arranged facing the light source 20, such that light rays from the light source 20 enter the light guide 10 through them.
  • the light entry part 210 may be part of the upper-side surface 200, or may be a specific light entry structure formed on the upper-side surface 200, e. g. a collimator for collimating incident light. As shown in Fig.
  • the first guide part comprises multiple second reflecting parts 310 formed on a rear-side surface of the light guide 10, the multiple second reflecting parts 310 being able to receive light rays incident from the light entry parts 210, and reflect light rays towards the light output part 410; in addition, at least one second reflecting part 310 of the multiple second reflecting parts 310 can also reflect light rays towards the first reflecting part 510.
  • the light output part 410 may extend in a curved manner along the front-side surface 400 towards a rear side of the light guide 10, to achieve a larger light output angle.
  • the multiple second reflecting parts 310 are also arranged in a stepped formation towards the rear side of the light guide.
  • the second reflecting part 310 comprises a reflecting face 311 and a connecting face 312, wherein the reflecting face 311 reflects light rays from the light entry part 210 towards the light output part 410, or towards the first reflecting part 510 and the light output part 410; the connecting face 312 connects the reflecting faces 311 of two adjacent second reflecting parts 310.
  • the reflecting face 311 may include, but are not limited to, a paraboloid, an ellipsoid, a freely curved surface, etc.
  • the reflecting faces of each of the second reflecting parts 310 face in substantially the same direction.
  • Fig. 7 shows an optical path diagram indicating the paths of propagation of a portion of light rays in the light guide 10, wherein the upper-side surface 200 of the light guide 10 has been omitted, in order to clearly show the second reflecting parts 310.
  • the light output part 410 outputs a first portion of light rays coming directly from the second reflecting parts 310 in an output region A, and outputs a second portion of light rays from the first reflecting part 510 in an output region B. Because the first reflecting part 510 cannot reflect all of the received light rays to the light output part 410, the amount of light in the second portion of light rays will be smaller than the amount of light in the first portion of light rays.
  • a first reflection enhancement structure is formed on the first reflecting part 510, to increase the amount of light in the second portion of light rays which comes from the first reflecting part 510 and is outputted from the output part 410.
  • the first reflection enhancement structure may include at least one of the following structures:
  • the first reflection enhancement structure comprises a reflective layer
  • a process such as coating, electroplating, spray painting, injection moulding, silkscreen printing or hot stamping may be used to form the reflective layer on the first reflecting part 510.
  • the colour of the reflective layer may be white, but other colours may of course also be chosen according to requirements; for example, the same colour as that of the light emitted by the light source is chosen.
  • the first reflection enhancement structure is provided on the first reflecting part 510, the amount of light in the second portion of light rays received at position P from the first reflecting part 510 by the observer is increased, and consequently, the observer is able to observe a uniform light output effect.
  • a third reflection enhancement structure is formed on a lower-side surface 800 of the light guide 10, to increase the amount of light in light rays arriving at the first reflecting part 510 from at least one second reflecting part 310.
  • the lower-side surface 800 of the light guide 10 acts as an auxiliary reflecting surface, and a portion of light rays from at least one second reflecting part 310 is reflected to the first reflecting part 510.
  • the third reflection enhancement structure may be the same as or different from the first reflection enhancement structure; in a non-limiting example, the third reflection enhancement structure may comprise at least one of the following structures :
  • the third reflection enhancement structure comprises a reflective layer
  • a process such as coating, electroplating, spray painting, injection moulding, silkscreen printing or hot stamping may be used to form the reflective layer on the lower-side surface 800 of the light guide 10.
  • the colour of the reflective layer may be white, but other colours may of course also be chosen according to requirements; for example, the same colour as that of the light emitted by the light source is chosen.
  • a fourth reflection enhancement structure is formed on the upper-side surface 200 of the light guide 10, to increase the amount of light in light rays arriving at the first reflecting part 510 from at least one second reflecting part 310.
  • the upper-side surface 200 of the light guide 10 acts as an auxiliary reflecting surface, and a portion of light rays from at least one second reflecting part 310 is reflected to the first reflecting part 510.
  • the fourth reflection enhancement structure may be the same as or different from the first reflection enhancement structure; in a non-limiting example, the fourth reflection enhancement structure may comprise at least one of the following structures :
  • the fourth reflection enhancement structure comprises a reflective layer
  • a process such as coating, electroplating, spray painting, injection moulding, silkscreen printing or hot stamping may be used to form the reflective layer on the upper-side surface 200 of the light guide 10.
  • the colour of the reflective layer may be white, but other colours may of course also be chosen according to requirements; for example, the same colour as that of the light emitted by the light source is chosen.
  • the third reflection enhancement structure may be provided in a partial region of the lower-side surface 800 of the light guide 10
  • the fourth reflection enhancement structure may be provided in a partial region of the upper-side surface 200 of the light guide 10, e. g. a partial region close to the first reflecting part 510.
  • the third reflection enhancement structure may also be provided over the entire lower-side surface 800
  • the fourth reflection enhancement structure may also be provided over the entire upper-side surface 200.
  • the third reflection enhancement structure and fourth reflection enhancement structure will simultaneously increase the amount of light in the first portion of light rays coming from the second reflecting part 310 and outputted from the light output part 410, and the amount of light in the second portion of light rays coming from the first reflecting part 510 and outputted from the light output part 410, but due to the overall increase in brightness, the observer will find it more difficult to observe any difference between the amounts of light in the two portions of light rays.
  • the light source 20 is arranged at a rear side of the light guide 10, facing a rear-side surface of the light guide 10, such that light rays from the light source 20 enter the light guide 10 from the rear-side surface.
  • the first guide part comprises multiple light entry parts (not shown) formed on the rear-side surface of the light guide 10, the multiple light entry parts being arranged facing the light source 20, receiving light rays from the light source 20 and guiding light rays towards the light output part 410; in addition, at least one of the multiple light entry parts may also guide light rays towards the first reflecting part 510.
  • the first reflection enhancement structure is also formed on the first reflecting part 510, and/or the third reflection enhancement structure is also formed on the lower-side surface 800 of the light guide 10, and/or the fourth reflection enhancement structure is also formed on the upper-side surface 200 of the light guide 10, so that the observer can observe a uniform light output effect at multiple positions where it is possible to simultaneously receive light rays from the first reflecting part 510 and light rays coming directly from the light entry parts.
  • the description in the first embodiment of the first guide part may specifically be referred to.
  • any two or all three of the first reflection enhancement structure, third reflection enhancement structure and fourth reflection enhancement structure can be provided simultaneously on the light guide 10.
  • a second reflection enhancement structure may also be arranged on the connecting face 312.
  • the second reflection enhancement structure may be the same as or different from the first reflection enhancement structure, and the second reflection enhancement structure may comprise at least one of the following structures :
  • the second reflection enhancement structure comprises a reflective layer
  • a process such as coating, electroplating, spray painting, injection moulding, silkscreen printing or hot stamping may be used to form the reflective layer on the connecting face 312.
  • the colour of the reflective layer may be white, but other colours may of course also be chosen according to requirements; for example, the same colour as that of the light emitted by the light source is chosen.
  • Fig 8 shows an optical path diagram indicating the paths of propagation of a portion of light rays in the light guide 10.
  • the light guide 10 may further comprise a second guide part and a third reflecting part 610, wherein the the second guide part is located at a rear side of the first guide part in a light ray output direction of the light guide 10 (or the positive direction of the X axis), and guides light rays from the light source 20 towards the third reflecting part 610; the third reflecting part 610 is formed between the second guide part and the first reflecting part 510, specifically on a rightside face 600 of the light guide, and guides light rays from the second guide part towards the first reflecting part 510 and the light output part 410, thereby illuminating a corner region enclosed by the light output face 400 and the rightside face 500.
  • the third reflecting part 610 may be part of the right-side surface 600; thus, when light rays from the second guide part are incident on the third reflecting part 610, they are reflected.
  • the light guide 10 comprises multiple light entry parts 210 formed on the upper-side surface 200, and these are arranged facing the light source 20, such that light rays from the light source 20 enter the light guide 10 through them; for the light entry parts 210, the above description may be referred to, and is not repeated here.
  • the second guide part may comprise a fourth reflecting part 320, for receiving and reflecting light rays from the light entry parts 210.
  • the light source 20 is arranged at a rear side of the light guide 10, such that light rays from the light source 20 enter the light guide 10 from the rear side.
  • the second guide part may comprise a light entry part (not shown) arranged facing the light source 20, to receive light rays from the light source 20 and reflect them towards the third reflecting part 610.
  • the first reflecting part 510 may be formed on a left-side face 700 of the light guide 10, or formed on both the right-side face 500 and the left-side face 700 of the light guide 10.
  • a vehicle comprising the lighting device 1 as described above.
  • the present invention is not limited to the structure described above; various other variants could also be used.
  • the present invention has already been described by means of a limited number of embodiments, those skilled in the art could, drawing benefit from this disclosure, design other embodiments which do not depart from the scope of protection of the present invention disclosed herein. Thus, the scope of protection of the present invention should be defined by the attached claims alone.

Landscapes

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

Abstract

The present invention relates to a light guide (10), comprising a first guide part, a light output part (410) and a first reflecting part (510), the first guide part is formed at a side opposite a side where the light output part (410) is located, and the first guide part guides light rays from light source or sources (20) towards the first reflecting part (510) and the light output part (410); the first reflecting part (5510) is formed between the first guide part and the light output part (410), and reflects a portion of light rays from the first guide part to the light output part (410); the light output part (410) outputs a first portion of light rays coming directly from the first guide part, and a second portion of light rays from the first reflecting part; and a reflection enhancement structure is formed on the light guide (10). The present invention also relates to a lighting device and a vehicle.

Description

Description
Light guide, lighting device and vehicle
Technical Field
The present invention relates to the technical field of vehicle lamps, in particular to a light guide, a lighting device and a vehicle.
Background Art
Lighting devices can provide light for illumination and/or signalling, and are widely used in various fields; for example, vehicle lamps are used in motor vehicles to ensure safe travel. Types of vehicle lamps may include motor vehicle headlamps, fog lamps, tail lamps, daytime running lamps, turn signal lamps, brake lamps and side marker lamps, etc. Furthermore, light guides can efficiently conduct and control light, and are thus widely used by lighting devices.
As vehicle lamps develop, more and more importance is attached to the aesthetics of vehicle lamp illumination effects; it is generally desired that a uniform illumination effect can be observed when the vehicle lamp is observed from multiple angles within a visual angle range. In these circumstances, the question of how to design the light guide structure is a major challenge.
Summary of the Invention
Thus, an object of the present invention is to propose a light guide, a lighting device and a vehicle, which can at least partially solve the problems mentioned above.
According to one aspect of the present invention, a light guide is provided, comprising a first guide part, a light output part and a first reflecting part, wherein: the first guide part is formed at a side opposite a side where the light output part is located, and the first guide part guides light rays from a light source or light sources towards the first reflecting part and the light output part; the first reflecting part is formed between the first guide part and the light output part, and reflects a portion of light rays from the first guide part to the light output part ; the light output part outputs a first portion of light rays coming directly from the first guide part, and a second portion of light rays from the first reflecting part; and a reflection enhancement structure is formed on the light guide, to increase the amount of light in the second portion of light rays.
According to an embodiment of the present invention, having the reflection enhancement structure formed on the light guide to increase the amount of light in the second portion of light rays enables an observer to observe a uniform light output effect at multiple positions where the observer is able to simultaneously receive light rays from the first reflecting part and light rays coming directly from the guide part.
In an embodiment, the reflection enhancement structure is formed on at least one of the following: the first reflecting part; an auxiliary reflecting surface, formed between the first guide part and the light output part, and reflecting a portion of light rays from the first guide part to the first reflecting part.
In an embodiment, the light guide is substantially in the form of a plate, and in a main output direction of the light guide, the first guide part is formed on a rear-side surface of the light guide, the light output part is formed on a front-side surface of the light guide, the first reflecting part is formed on a left-side and/or a right-side surface of the light guide, and the auxiliary reflecting surface comprises an upper-side surface and/or a lower-side surface of the light guide.
In an embodiment, the reflection enhancement structure comprises at least one of the following structures: a reflective layer; a protrusion structure; a depression structure.
According to an embodiment of the present invention, the reflection enhancement structure can increase the amount of light in the second portion of light rays, enabling an observer to observe a uniform light output effect at multiple positions where the observer is able to simultaneously receive light rays from the first reflecting part and light rays coming directly from the guide part.
In an embodiment, the first guide part comprises multiple light entry parts, which face the light sources such that light rays from the light sources enter the light entry parts.
According to an embodiment of the present invention, when the first guide part comprises the light entry parts, light rays from the light sources can be guided directly to the first reflecting part and the light output part by means of the first guide part.
In an embodiment, the light guide further comprises multiple light entry parts, and the first guide part comprises multiple second reflecting parts, wherein: the light entry part faces the light source or light sources, such that light rays from the light source or light sources enter the light entry part; at least one second reflecting part of the multiple second reflecting parts reflects light rays from the light entry part towards the first reflecting part and the light output part.
According to an embodiment of the present invention, when the first guide part comprises the second reflecting parts, light rays from the light sources are reflected at the first guide part and guided towards the first reflecting part and the light output part.
In an embodiment, the multiple second reflecting parts are arranged in a stepped formation.
According to an embodiment of the present invention, having the multiple second reflecting parts arranged in a stepped formation helps to achieve a uniform light output effect.
In an embodiment, the second reflecting part comprises a reflecting face and a connecting face; the reflecting face reflects light rays from the light entry part towards the first reflecting part and the light output part, and the connecting face connects the reflecting faces of two adjacent second reflecting parts.
In an embodiment, a reflection enhancement structure is formed on the connecting face, to reduce light leakage from the connecting face.
According to an embodiment of the present invention, having the reflection enhancement structure arranged on the connecting face makes it possible to increase the reflection of light rays by the connecting face and thereby reduce light leakage.
In an embodiment, the reflection enhancement structure comprises at least one of the following structures: a reflective layer; a protrusion structure; a depression structure.
According to an embodiment of the present invention, having the reflection enhancement structure arranged on the connecting face makes it possible to increase the reflection of light rays by the connecting face and thereby reduce light leakage.
In an embodiment, the light guide further comprises a second guide part and a third reflecting part, wherein the second guide part guides light rays from the light source towards the third reflecting part; the third reflecting part is formed between the second guide part and the first reflecting part, and guides light rays from the second guide part towards the first reflecting part and the light output part.
According to an embodiment of the present invention, the configura ion of the second guide part and the third reflecting part helps to illuminate a corner region enclosed by the light output part and the first reflecting part.
In an embodiment, the second guide part comprises a light entry part, wherein the light entry part faces the light source or light sources such that light rays from the light source or light sources enter the light entry part.
When the second guide part comprises the light entry part, light rays from the light source can be guided towards the third reflecting part directly by means of the second guide part.
In an embodiment, the light guide further comprises a light entry part, and the second guide part comprises a fourth reflecting part, wherein: the light entry part faces the light source or light sources, such that light rays from the light source or light sources enter the light entry part; the fourth reflecting part reflects light rays from the light entry part towards the third reflecting part.
According to an embodiment of the present invention, when the second guide part comprises the fourth reflecting part, light rays from the light source are reflected at the second guide part and guided towards the third reflecting part.
In an embodiment, the second guide part is located at a rear side of the first guide part in a light ray output direction of the light guide.
According to another aspect of the present invention, a lighting device is further provided, comprising any one of the light guides described above; light source or light sources, which emits or emit light rays towards the light guide.
According to another aspect of the present invention, a vehicle is further provided, comprising any one of the lighting devices described above.
Brief Description of the Figures
The above-described characteristics, technical features and advantages of the present invention and modes of implementation thereof will be further explained below in a clear and easy-fo-understand manner through a description of preferred embodiments with reference to the drawings, wherein FIG. 1 shows a top view of a lighting device 1 according to an embodiment of the present invention;
FIG. 2 shows a front view of the lighting device 1 in FIG. 1;
FIG. 3 shows a top view of a light guide 10 according to an embodiment of the present invention;
FIG. 4 shows a bottom view of the light guide 10 in Figure 3;
FIG. 5 shows a side view of the light guide 10 in Figure 3;
FIG. 6 shows another side view of the light guide 10 in Figure 3;
FIG. 7 shows an optical path diagram indicating the paths of propagation of a portion of light rays in the light guide 10 in Figure 3.
FIG. 8 shows an optical path diagram indicating the paths of propagation of another portion of light rays in the light guide 10 in Figure 3.
Detailed Description of Embodiments
Embodiments of the present invention are described demonstratively below. As those skilled in the art should realize, the embodiments explained may be amended in various ways without departing from the concept of the present invention. Thus, the drawings and description are essentially illustrative, not restrictive. In the following text, identical reference numerals generally denote elements with identical or similar functions.
In the description of the embodiments of the present invention and the accompanying drawings, the X-axis represents the longitudinal direction, the Y-axis represents the horizontal direction, and the Z-axis represents the vertical direction. Moreover, "front” , "rear” , "left” and "right” all take the positive direction of the X-axis as a reference, while "upper” and "lower” take the positive direction of the Z-axis as a reference.
Fig. 1 shows a top view of a lighting device 1 according to an embodiment of the present invention; Fig. 2 shows a front view of the lighting device 1 in Fig. 1. As shown in Figs. 1 and 2, the lighting device 1 comprises a light guide 10, and a light source 20 which emits light rays towards the light guide 10, wherein the light guide 10 is substantially in the form of a plate, and has a main output direction in the positive direction of the X-axis. The light source 20 is arranged above the light guide 10, facing an upper-side surface 200 of the light guide 10, such that light rays from the light source 20 enter the light guide 10 from the upperside surface 200. The light guide 10 further comprises a lug 100 for fixing the light guide 10 to another component (for example but not limited to a casing of the lighting device 1), and a mounting hole may be provided in the lug 100. Correspondingly, as shown in Figs. 1 and 2, in the case where the lug 100 is positioned facing the light source 20, the light source 20 may comprise a through-hole or slot to make way for the lug 100.
As a variant of the embodiment shown in Figs. 1 and 2, the light source 20 may be arranged at another side of the light guide 10 and input light from another surface of the light guide 10; for example, but without limitation, the light source 20 is arranged at a rear side of the light guide 10, facing a rear-side surface of the light guide 10, such that light rays from the light source 20 enter the light guide 10 from the rear-side surface.
In a non-limiting example, the light guide 10 may be made of a transparent material, for example but not limited to glass, resin or plastic material, etc. , wherein the plastic material may comprise PMMA (polymethyl methacrylate).
As shown in Figs. 1 and 2, the light source 20 comprises a base plate 21, a base plate 22, and multiple light emitting devices 23 mounted on the base plates 21 and 22. In a nonlimiting embodiment, the base plates 21 and 22 are printed circuit boards, and the light emitting devices 23 are light emitting diodes. Furthermore, the number of base plates is not limited to this, and can be set as required.
Fig. 3 shows a top view of a light guide 10 according to an embodiment of the present invention; Fig. 4 shows a bottom view of the light guide 10 in Fig. 3; Fig. 5 shows a side view of the light guide 10 in Fig. 3; Fig. 6 shows another side view of the light guide 10 in Fig. 3. As shown in Figs.
3 - 6, the light guide 10 comprises a light output part 410 formed on a front-side surface 400, a first guide part formed on a rear-side surface 900 of the light guide 10, and a first reflecting part 510 which is formed between the light output part 410 and the first guide part, specifically on a rightside surface 500 of the light guide 10. The first guide part can guide light rays entering the light guide 10 towards the first reflecting part 510 and the light output part 410, the first reflecting part 510 can reflect a portion of light rays from the first guide part to the light output part 410, and finally, the light output part 410 outputs a first portion of light rays coming directly from the first guide part, and outputs a second portion of light rays from the first reflecting part 510.
In a non-limiting example, the light output part 410 may be part of the front-side surface 400, or may be a specific light output structure formed on the front-side surface 400; for example, as shown in Figs. 3 and 6, the light output part 410 may be optical protrusions formed on the front-side surface 400.
In a non-limiting example, the first reflecting part 510 may be part of the right-side surface 500; thus, when light rays from the first guide part are incident on the first reflecting part 510, they are reflected.
Embodiments of the first guide part are described in detail below with reference to the drawings.
In a first embodiment of the first guide part, as shown in Fig. 3, the light guide 10 comprises multiple light entry parts 210 formed on the upper-side surface 200; these are arranged facing the light source 20, such that light rays from the light source 20 enter the light guide 10 through them. In a non-limiting example, the light entry part 210 may be part of the upper-side surface 200, or may be a specific light entry structure formed on the upper-side surface 200, e. g. a collimator for collimating incident light. As shown in Fig. 4, the first guide part comprises multiple second reflecting parts 310 formed on a rear-side surface of the light guide 10, the multiple second reflecting parts 310 being able to receive light rays incident from the light entry parts 210, and reflect light rays towards the light output part 410; in addition, at least one second reflecting part 310 of the multiple second reflecting parts 310 can also reflect light rays towards the first reflecting part 510. To meet the demands of laws or specific modelling designs, the light output part 410 may extend in a curved manner along the front-side surface 400 towards a rear side of the light guide 10, to achieve a larger light output angle. In this case, in order to obtain a uniform light output effect, the multiple second reflecting parts 310 are also arranged in a stepped formation towards the rear side of the light guide.
As shown in Figs. 4 - 6, the second reflecting part 310 comprises a reflecting face 311 and a connecting face 312, wherein the reflecting face 311 reflects light rays from the light entry part 210 towards the light output part 410, or towards the first reflecting part 510 and the light output part 410; the connecting face 312 connects the reflecting faces 311 of two adjacent second reflecting parts 310. Examples of the reflecting face 311 may include, but are not limited to, a paraboloid, an ellipsoid, a freely curved surface, etc. In addition, the reflecting faces of each of the second reflecting parts 310 face in substantially the same direction.
Fig. 7 shows an optical path diagram indicating the paths of propagation of a portion of light rays in the light guide 10, wherein the upper-side surface 200 of the light guide 10 has been omitted, in order to clearly show the second reflecting parts 310. As shown in Fig. 7, the light output part 410 outputs a first portion of light rays coming directly from the second reflecting parts 310 in an output region A, and outputs a second portion of light rays from the first reflecting part 510 in an output region B. Because the first reflecting part 510 cannot reflect all of the received light rays to the light output part 410, the amount of light in the second portion of light rays will be smaller than the amount of light in the first portion of light rays. Thus, when an observer at position P observes light output region A and light output region B, he will find that the brightness of light output region B is dimmer than the brightness of light output region A; the light output effect is not uniform. Likewise, at other positions where it is possible to simultaneously receive light rays from the first reflecting part 510 and light rays coming directly from the second reflecting parts 310, the observer can also observe that the light output effect is not uniform.
To solve this problem, in a first example of a first embodiment of the present invention, a first reflection enhancement structure is formed on the first reflecting part 510, to increase the amount of light in the second portion of light rays which comes from the first reflecting part 510 and is outputted from the output part 410. In a non-limiting example, the first reflection enhancement structure may include at least one of the following structures:
- a reflective layer;
- a protrusion structure;
- a depression structure.
In the case where the first reflection enhancement structure comprises a reflective layer, a process such as coating, electroplating, spray painting, injection moulding, silkscreen printing or hot stamping may be used to form the reflective layer on the first reflecting part 510. Preferably, the colour of the reflective layer may be white, but other colours may of course also be chosen according to requirements; for example, the same colour as that of the light emitted by the light source is chosen.
According to the first example of the first embodiment of the present invention, because the first reflection enhancement structure is provided on the first reflecting part 510, the amount of light in the second portion of light rays received at position P from the first reflecting part 510 by the observer is increased, and consequently, the observer is able to observe a uniform light output effect.
In a second example of the first embodiment of the present invention, a third reflection enhancement structure is formed on a lower-side surface 800 of the light guide 10, to increase the amount of light in light rays arriving at the first reflecting part 510 from at least one second reflecting part 310. In this example, the lower-side surface 800 of the light guide 10 acts as an auxiliary reflecting surface, and a portion of light rays from at least one second reflecting part 310 is reflected to the first reflecting part 510. The third reflection enhancement structure may be the same as or different from the first reflection enhancement structure; in a non-limiting example, the third reflection enhancement structure may comprise at least one of the following structures :
- a reflective layer;
- a protrusion structure;
- a depression structure.
In the case where the third reflection enhancement structure comprises a reflective layer, a process such as coating, electroplating, spray painting, injection moulding, silkscreen printing or hot stamping may be used to form the reflective layer on the lower-side surface 800 of the light guide 10. Preferably, the colour of the reflective layer may be white, but other colours may of course also be chosen according to requirements; for example, the same colour as that of the light emitted by the light source is chosen.
In a third example of the first embodiment of the present invention, a fourth reflection enhancement structure is formed on the upper-side surface 200 of the light guide 10, to increase the amount of light in light rays arriving at the first reflecting part 510 from at least one second reflecting part 310. In this example, the upper-side surface 200 of the light guide 10 acts as an auxiliary reflecting surface, and a portion of light rays from at least one second reflecting part 310 is reflected to the first reflecting part 510. The fourth reflection enhancement structure may be the same as or different from the first reflection enhancement structure; in a non-limiting example, the fourth reflection enhancement structure may comprise at least one of the following structures :
- a reflective layer;
- a protrusion structure;
- a depression structure.
In the case where the fourth reflection enhancement structure comprises a reflective layer, a process such as coating, electroplating, spray painting, injection moulding, silkscreen printing or hot stamping may be used to form the reflective layer on the upper-side surface 200 of the light guide 10. Preferably, the colour of the reflective layer may be white, but other colours may of course also be chosen according to requirements; for example, the same colour as that of the light emitted by the light source is chosen.
Furthermore, in the above examples, the third reflection enhancement structure may be provided in a partial region of the lower-side surface 800 of the light guide 10, and the fourth reflection enhancement structure may be provided in a partial region of the upper-side surface 200 of the light guide 10, e. g. a partial region close to the first reflecting part 510. In this case, because the amount of light in the light rays arriving at the first reflecting part 510 is increased, the amount of light in the second portion of light rays coming from the first reflecting part 510 and outputted from the light output part 410 is increased indirectly, so the observer is able to observe a uniform light output effect. The third reflection enhancement structure may also be provided over the entire lower-side surface 800, and the fourth reflection enhancement structure may also be provided over the entire upper-side surface 200. In this case, the third reflection enhancement structure and fourth reflection enhancement structure will simultaneously increase the amount of light in the first portion of light rays coming from the second reflecting part 310 and outputted from the light output part 410, and the amount of light in the second portion of light rays coming from the first reflecting part 510 and outputted from the light output part 410, but due to the overall increase in brightness, the observer will find it more difficult to observe any difference between the amounts of light in the two portions of light rays.
In a second embodiment of the first guide part, the light source 20 is arranged at a rear side of the light guide 10, facing a rear-side surface of the light guide 10, such that light rays from the light source 20 enter the light guide 10 from the rear-side surface. In this case, the first guide part comprises multiple light entry parts (not shown) formed on the rear-side surface of the light guide 10, the multiple light entry parts being arranged facing the light source 20, receiving light rays from the light source 20 and guiding light rays towards the light output part 410; in addition, at least one of the multiple light entry parts may also guide light rays towards the first reflecting part 510.
In this embodiment, as in the first embodiment of the first guide part, the first reflection enhancement structure is also formed on the first reflecting part 510, and/or the third reflection enhancement structure is also formed on the lower-side surface 800 of the light guide 10, and/or the fourth reflection enhancement structure is also formed on the upper-side surface 200 of the light guide 10, so that the observer can observe a uniform light output effect at multiple positions where it is possible to simultaneously receive light rays from the first reflecting part 510 and light rays coming directly from the light entry parts. For the first reflection enhancement structure, third reflection enhancement structure and fourth reflection enhancement structure, the description in the first embodiment of the first guide part may specifically be referred to.
It must be explained that in the embodiments above, it is also possible for any two or all three of the first reflection enhancement structure, third reflection enhancement structure and fourth reflection enhancement structure to be provided simultaneously on the light guide 10.
Furthermore, in the first embodiment of the first guide part above, a portion of light rays reflected by the reflecting faces 311 of the second reflecting parts 310 may leak out through the connecting faces 312, so in order to reduce the amount of light leakage, a second reflection enhancement structure may also be arranged on the connecting face 312. The second reflection enhancement structure may be the same as or different from the first reflection enhancement structure, and the second reflection enhancement structure may comprise at least one of the following structures :
- a reflective layer;
- a protrusion structure;
- a depression structure.
In the case where the second reflection enhancement structure comprises a reflective layer, a process such as coating, electroplating, spray painting, injection moulding, silkscreen printing or hot stamping may be used to form the reflective layer on the connecting face 312. Preferably, the colour of the reflective layer may be white, but other colours may of course also be chosen according to requirements; for example, the same colour as that of the light emitted by the light source is chosen.
Fig 8 shows an optical path diagram indicating the paths of propagation of a portion of light rays in the light guide 10. As shown in Figs. 4, 6 and 8, the light guide 10 may further comprise a second guide part and a third reflecting part 610, wherein the the second guide part is located at a rear side of the first guide part in a light ray output direction of the light guide 10 (or the positive direction of the X axis), and guides light rays from the light source 20 towards the third reflecting part 610; the third reflecting part 610 is formed between the second guide part and the first reflecting part 510, specifically on a rightside face 600 of the light guide, and guides light rays from the second guide part towards the first reflecting part 510 and the light output part 410, thereby illuminating a corner region enclosed by the light output face 400 and the rightside face 500.
In a non-limiting example, the third reflecting part 610 may be part of the right-side surface 600; thus, when light rays from the second guide part are incident on the third reflecting part 610, they are reflected.
Similar to the embodiments of the first guide part, as shown in Figs. 3, 4, 6 and 8, in a first embodiment of the second guide part, the light guide 10 comprises multiple light entry parts 210 formed on the upper-side surface 200, and these are arranged facing the light source 20, such that light rays from the light source 20 enter the light guide 10 through them; for the light entry parts 210, the above description may be referred to, and is not repeated here. The second guide part may comprise a fourth reflecting part 320, for receiving and reflecting light rays from the light entry parts 210.
In a second embodiment of the second guide part, the light source 20 is arranged at a rear side of the light guide 10, such that light rays from the light source 20 enter the light guide 10 from the rear side. The second guide part may comprise a light entry part (not shown) arranged facing the light source 20, to receive light rays from the light source 20 and reflect them towards the third reflecting part 610.
As a variant of the embodiment above, the first reflecting part 510 may be formed on a left-side face 700 of the light guide 10, or formed on both the right-side face 500 and the left-side face 700 of the light guide 10.
According to an embodiment of the present invention, a vehicle is also included, comprising the lighting device 1 as described above. The present invention is not limited to the structure described above; various other variants could also be used. Although the present invention has already been described by means of a limited number of embodiments, those skilled in the art could, drawing benefit from this disclosure, design other embodiments which do not depart from the scope of protection of the present invention disclosed herein. Thus, the scope of protection of the present invention should be defined by the attached claims alone.

Claims

Claims
1. Light guide (10), characterized by comprising a first guide part, a light output part (410) and a first reflecting part (510), wherein: the first guide part is formed at a side opposite a side where the light output part (410) is located, and the first guide part guides light rays from a light source or light sources (20) towards the first reflecting part (510) and the light output part (410) ; the first reflecting part (510) is formed between the first guide part and the light output part (410), and reflects a portion of light rays from the first guide part to the light output part (410) ; the light output part (410) outputs a first portion of light rays coming directly from the first guide part, and a second portion of light rays from the first reflecting part (510) ; and a reflection enhancement structure is formed on the light guide (10), to increase the amount of light in the second portion of light rays.
2. Light guide (10) according to Claim 1, characterized in that the reflection enhancement structure is formed on at least one of the following: the first reflecting part (510) ; an auxiliary reflecting surface, formed between the first guide part and the light output part (410), and reflecting a portion of light rays from the first guide part to the first reflecting part (510).
3. Light guide (10) according to Claim 2, characterized in that the light guide (10) is substantially in the form of a plate, and in a main output direction of the light guide (10), the first guide part is formed on a rear-side surface (900) of the light guide (10), the light output part is formed on a front-side surface (400) of the light guide (10), the first reflecting part (510) is formed on a left-side and/or a right-side surface of the light guide (10), and the auxiliary reflecting surface comprises an upper-side surface (200) and/or a lower-side surface (800) of the light guide (10).
4. Light guide (10) according to Claim 2, characterized in that the reflection enhancement structure comprises at least one of the following structures: a reflective layer; a protrusion structure; a depression structure.
5. Light guide (10) according to any one of Claims 1 - 4, characterized in that the first guide part comprises multiple light entry parts, which face the light sources (20) such that light rays from the light sources (20) enter the light entry parts.
6. Light guide (10) according to any one of Claims 1 - 4, characterized in that the light guide (10) further comprises multiple light entry parts (210), and the first guide part comprises multiple second reflecting parts (310), wherein: the light entry part (210) faces the light source or light sources (20), such that light rays from the light source or light sources (20) enter the light entry part (210) ; at least one second reflecting part (310) of the multiple second reflecting parts (310) reflects light rays from the light entry part (210) towards the first reflecting part (510) and the light output part (410).
7. Light guide (10) according to Claim 6, characterized in that the multiple second reflecting parts (310) are arranged in a stepped formation.
8. Light guide (10) according to Claim 7, characterized in that the second reflecting part (310) comprises a reflecting face (311) and a connecting face (312) ; the reflecting face (311) reflects light rays from the light entry part towards the first reflecting part (510) and the light output part (410), and the connecting face (312) connects the reflecting faces (311) of two adjacent said second reflecting parts (310).
9. Light guide (10) according to Claim 8, characterized in that reflection enhancement structure is formed on the connecting face (312), to reduce light leakage from the connecting face (312).
10. Light guide (10) according to Claim 9, characterized in that the reflection enhancement structure on the connecting face (312) comprises at least one of the following structures : a reflective layer; a protrusion structure; a depression structure.
11. Light guide (10) according to any one of Claims 1 - 10, characterized in that the light guide (10) further comprises a second guide part and a third reflecting part (610), wherein the second guide part guides light rays from the light source (20) towards the third reflecting part (610) ; the third reflecting part (610) is formed between the second guide part and the first reflecting part (510), and guides light rays from the second guide part towards the first reflecting part (510) and the light output part (410).
12. Light guide (10) according to Claim 11, characterized in that the second guide part comprises a light entry part, wherein the light entry part faces the light source or light sources (20) such that light rays from the light source or light sources (20) enter the light entry part.
13. Light guide (10) according to Claim 11, characterized in that the light guide (10) further comprises a light entry part (210), and the second guide part comprises a fourth reflecting part, wherein: the light entry part (210) faces the light source or light sources (20), such that light rays from the light source or light sources (20) enter the light entry part (210) ; the fourth reflecting part (320) reflects light rays from the light entry part (210) towards the third reflecting part (610).
14. Light guide (10) according to Claim 12 or 13, characterized in that the second guide part is located at a rear side of the first guide part in a light ray output direction of the light guide (10).
15. Lighting device (1), characterized by comprising: the light guide (10) according to any one of Claims 1 - 14; light source or light sources (20), which emits or emit light rays towards the light guide (10).
16. Vehicle, characterized by comprising the lighting device (1) according to Claim 15.
EP22762081.2A 2021-08-11 2022-08-10 Light guide, lighting device and vehicle Pending EP4384751A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202121868387.4U CN215892233U (en) 2021-08-11 2021-08-11 Light guide, lighting device and vehicle
PCT/EP2022/072492 WO2023017100A1 (en) 2021-08-11 2022-08-10 Light guide, lighting device and vehicle

Publications (1)

Publication Number Publication Date
EP4384751A1 true EP4384751A1 (en) 2024-06-19

Family

ID=80343812

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22762081.2A Pending EP4384751A1 (en) 2021-08-11 2022-08-10 Light guide, lighting device and vehicle

Country Status (3)

Country Link
EP (1) EP4384751A1 (en)
CN (1) CN215892233U (en)
WO (1) WO2023017100A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2024082033A (en) * 2022-12-07 2024-06-19 スタンレー電気株式会社 Vehicle lighting fixtures

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160341393A1 (en) * 2015-01-19 2016-11-24 SMR Patents S.à.r.I. Light Guiding Device
JP2021097015A (en) * 2019-12-19 2021-06-24 スタンレー電気株式会社 Lighting fixture for vehicle

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2995977B1 (en) * 2012-09-26 2019-06-28 Valeo Vision LIGHT GUIDE FOR A DEVICE FOR LIGHTING AND / OR SIGNALING A MOTOR VEHICLE
ITUB20156264A1 (en) * 2015-12-04 2017-06-04 Automotive Lighting Italia S P A A Socio Unico LIGHTING DEVICE FOR VEHICLES
JP7211903B2 (en) * 2019-06-20 2023-01-24 スタンレー電気株式会社 vehicle lamp
CN118729181A (en) * 2019-12-12 2024-10-01 株式会社小糸制作所 Vehicle lights
US10962194B1 (en) * 2019-12-14 2021-03-30 Valeo North America, Inc. Motor vehicle light guide and reflective coupler system for outboard homogenous lit appearance of lamp module

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160341393A1 (en) * 2015-01-19 2016-11-24 SMR Patents S.à.r.I. Light Guiding Device
JP2021097015A (en) * 2019-12-19 2021-06-24 スタンレー電気株式会社 Lighting fixture for vehicle

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2023017100A1 *

Also Published As

Publication number Publication date
WO2023017100A1 (en) 2023-02-16
CN215892233U (en) 2022-02-22

Similar Documents

Publication Publication Date Title
KR102410899B1 (en) Optical module for automotive headlamps
US11320112B2 (en) Optical device for an automobile vehicle
KR20200071022A (en) Vehicle light and/or signalling device
CN113639247A (en) Light guide member, light emitting assembly, lighting device and vehicle
CN103442946B (en) Vehicle lights for vehicle interior lighting
EP3988840B1 (en) Vehicle lamp
CN103867981B (en) Lighting device for a motor vehicle
JP7458238B2 (en) Vehicle lighting fixtures
EP3929034B1 (en) Vehicle lamp with a light guide
CN108361651B (en) Lighting device with light guide mounted on support integrated with transparent magnifying screen
JP2025163284A (en) Lighting equipment and motor vehicles
WO2023017100A1 (en) Light guide, lighting device and vehicle
JP7145644B2 (en) vehicle lamp
JP6320110B2 (en) Vehicle lamp with license lamp
JP2020194622A (en) Vehicular lighting fixture
CN116336415A (en) Optical element, lighting device and motor vehicle
CN108916810B (en) Light reflector for an optical module of a vehicle lamp, vehicle lamp and motor vehicle
JP2021153002A (en) Vehicle lamp
WO2023198718A1 (en) Optical component, lighting device and vehicle
JP7139148B2 (en) vehicle lamp
CN219995142U (en) Light guide assembly, lamp device and motor vehicle
EP4390215A1 (en) A signaling and/or lighting device for a motor vehicle
US20250155099A1 (en) Optical element, lighting device and vehicle
CN223690902U (en) Lamp for vehicle
KR102546800B1 (en) Lamp for vehicle

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: UNKNOWN

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20240311

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

17Q First examination report despatched

Effective date: 20251203