• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A vehicle lamp (1) is described. The vehicle lamp (1) has a plurality of light sources (10) arranged in a row; a light guide (20) configured to receive light emitted from the light sources (10) on its rear surface, and to emit light through its front surface. The light guide (20) comprises: a base (22) having a rear surface extending in the direction of the arrangement of the plurality of light sources (10); a plurality of rear surface projections (24) projecting from the rear surface of the base (22); and a plurality of front surface projections (26) projecting from the front surface of the base. The rear surface projections and the front surface projections (26) are arranged in the direction of the arrangement so as to be separated from each other, and are respectively formed as a plurality of projection forming areas. (28). Each of the front surface projections (26) has a polyhedral shape including a plurality of successive faces in its circumferential direction.
    公开号:FR3026161A1
    申请号:FR1558708
    申请日:2015-09-16
    公开日:2016-03-25
    发明作者:Susumu Kaneko；Kyouhei Akiyama；Takayuki Suzuki
    申请人:Koito Manufacturing Co Ltd；
    IPC主号:
    专利说明:

    [0001] TECHNICAL FIELD [0001] The present description relates to a lamp for a vehicle used, for example, in an automobile.
    [0002] BACKGROUND [0002] As a vehicle lamp source, a semiconductor light source such as, for example, a light emitting diode (LED) or a semiconductor laser is used, replacing a conventional light bulb such as for example, an incandescent bulb. Such a semiconductor light source has various advantages, such as, for example, a variety of designs through a combination with light guides or a large energy saving, compared to a light bulb. See, for example, Japanese Patent Laid-open Publication No. 2003-141909 and Japanese Patent Laid-open Publication No. 2005-347144. SUMMARY [0003] A vehicle lamp using a conventional semiconductor light source has been developed, focusing on a uniform light emission with a reduced point light sensation. In other words, the light emission pattern is monotonous and there is room for improvement in terms of high quality sensation. The present description has been made taking into account the circumstances above and one of the explanatory objectives of an exemplary embodiment thereof is to provide a vehicle lamp capable of creating a similar gloss to jewelry when the vehicle lamp is on and / or off. An aspect of the present disclosure relates to a vehicle lamp. The vehicle lamp comprises: a plurality of light sources arranged in a row; a light guide configured to receive the light emitted from the plurality of light sources on its rear surface, and to emit light through its front surface. The light guide comprises: a base having a rear surface facing the plurality of light sources and extending in the direction of the arrangement of the plurality of light sources; a plurality of rear surface projections projecting from the rear surface of the base; and a plurality of front surface projections projecting from the front surface of the base. The plurality of rear surface projections and the plurality of front surface projections are arranged in the layout direction so as to be separated from each other, and are respectively formed as a plurality of projection. Each of the projection training areas has a cross section, in which the widthwise side of the base, which is perpendicular to the direction of the arrangement, becomes the longer side. Each projection of the plurality of front surface projections has a polyhedral shape including a plurality of faces in succession in its circumferential direction. According to this aspect, when the vehicle lamp is turned on, the light emitted by a light source and incident on a rear surface projection is introduced into a front surface projection and reflected several times by the plurality of faces. the polyhedron front surface projection, so that a jewel-like brilliance can be created. In addition, when the vehicle lamp is extinguished, the external light such as, for example, sunlight, is incident on the plurality of faces of the polyhedron front surface projection, so that a flicker effect similar to that of jewelry can be created. Each face of the plurality of faces of the front surface projection may have a concave shape in the direction of its width. Thanks to the concave face, when external light such as, for example, the sunlight is incident on it, the light can be refracted so as to be diffused in the width direction, so as to improve the a jewel-like gloss, with respect to the case where the front surface projection is shaped to have a convex shape to collect the light. [0008] The faces of the plurality of faces of the front surface projection may succeed in the circumferential direction along the front surface of the base. The plurality of rear surface projections may include: a plurality of first projections, each of which is disposed on or adjacent to the optical axis of a corresponding source of the plurality of light sources; and a plurality of second projections, each of which is disposed between two adjacent first projections. The tip end of each projection of the plurality of first projections has a convex shape and the tip end of each projection of the plurality of second projections has a concave shape. Thanks to this arrangement, each of the first projections can collect the light mainly from a corresponding light source and each of the second projections can collect light obliquely incident on it from two adjacent light sources, so as to illuminate the guide uniformly. from light. The base of the light guide may have a section whose front surface is convex. By forming the front surface projections on the curved surface, the three-dimensional effect can be enhanced. [0011] The vehicle lamp may further include an inner lens inserted between the plurality of light sources and the light guide. By inserting the inner lens, the light from the light source can be incident on the light guide in a state where the light is scattered and the effective directivity of the light is decreased.
    [0003] As a result, the point light sensation can be reduced and the light can be emitted uniformly throughout the vehicle lamp. In addition, the light can be incident on the front surface projections from various directions and can be reflected several times in it so that the jewel-like brilliance can be seen. In the inner lens, cylindrical steps can be formed on the rear surface of the inner lens facing the plurality of light sources, so as to succeed one another in the direction of the arrangement of the light sources. In this way, the light from the light sources can be properly diffused. At least one projection of the plurality of front surface projections may be formed into an eleven-sided shape with the exception of its underside. The area of the front surface of the base between each of the two adjacent projection training areas may be subject to a diffusion treatment. As a result, a portion that emits light from a hue of jewelry and a portion that emits light of a matte hue may appear alternately. Thus, the similarity with jewelry can be further enhanced through the contrast between the parts. The shape of the projections of the plurality of front surface projections may vary progressively in the direction of the arrangement direction. In this way, the hue of jewelry suitable for the design of a vehicle lamp can be created. Another aspect of the present disclosure relates to a vehicle lamp. The vehicle lamp comprises: a plurality of light sources arranged in a row; a light guide configured to receive the light emitted from the plurality of light sources on its rear surface, and to emit light through its front surface. The light guide comprises: a base having a rear surface facing the plurality of light sources and extending in the direction of the arrangement of the plurality of light sources; and a plurality of front surface projections projecting from the front surface of the base. The projections of the plurality of front surface projections are arranged in the layout direction so as to be separated from each other and are respectively shaped as a plurality of projection forming areas. Each of the projection training areas has a cross section whose one side in the width direction of the base, which is perpendicular to the direction of the arrangement, becomes the long side. Each projection of the plurality of front surface projections has a polyhedral shape including a plurality of successive faces in its circumferential direction. On the other hand, the optional combination of the aforementioned components or the replacement of the components or expressions of the present description, for example, between a method, a device and a system, is also effective as an embodiment of the present invention. this description. According to the aspects of the present description, a shine similar to that of jewelry can be created. The previous summary is only explanatory and is in no way intended to be limiting. In addition to the aspects, embodiments and explanatory features described above, other aspects, features and features will become apparent with reference to the drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS The invention will be well understood and its advantages will be better understood on reading the detailed description which follows. The description refers to the following drawings, which are given by way of example. Fig. 1 is a horizontal sectional view illustrating a vehicle lamp according to an exemplary embodiment. Figures 2A and 2B are perspective views illustrating a light guide seen from the front surface side. FIG. 3 is a perspective view illustrating a front surface projection of the light guide viewed in a direction different from that of FIGS. 2A and 2B. Figure 4 is a view illustrating a portion of the light guide seen from the rear surface side. Figure 5 is a view illustrating the positional relationship between the light guide and the light sources. Figure 6 is a perspective view illustrating a front surface projection according to a modification. DETAILED DESCRIPTION [0026] In the following detailed description, reference is made to the accompanying drawings forming part thereof. The explanatory embodiments described in the detailed description, the drawings and the claims are not intended to be limiting. Other embodiments may be used and other modifications may be made without departing from the spirit or scope of the object presented herein.
    [0004] In the following description and drawings, the same components will be represented by the same reference numerals. Figure 1 is a horizontal sectional view illustrating a vehicle lamp according to an exemplary embodiment. In the present exemplary embodiment, a rear light will be described by way of example as a vehicle lamp. The vehicle lamp 1 comprises a lamp body 2, a cover (outer lens) 4, a plurality of light sources 10, a support member 12, a light guide 20 and a lens The light sources 10, the support member 12, the light guide 5 and the inner lens 40 are arranged in a lamp chamber formed of the lamp body 2 and the lid 4. The sources of light the plurality of light sources 10 are arranged in a row so as to be separated from each other in accordance with a desired light emission pattern. The radiation direction of the light sources 10 is aligned so as to face the front of the vehicle lamp 1 (the rear of the vehicle). The light sources 10 are semiconductor light sources such as, for example, light-emitting diodes (LEDs) or semiconductor lasers and are mounted on a flexible board 14. The flexible board 14 is mounted to conform to to the support member 12. Thus, the sources of the plurality of light sources 10 are supported by the support member 12 in staggered form. The light guide 20 receives light emitted from the plurality of light sources 10 on its rear surface and outputs the light through its front surface. The inner lens 40 is inserted between the plurality of light sources 10 and the light guide 20 so as to diffuse the light emitted by the light source 10 by refraction and to introduce light into the rear surface of the light guide. 20. The cylindrical rungs 44 may be formed on the rear surface 42 of the inner lens 40 facing the plurality of light sources 10 so as to succeed one another in the direction D1 in which the light sources 10 are arranged ( hereinafter referred to as the "direction of arrangement D1"). Through the cylindrical rungs 44, the light emitted by the plurality of light sources 10 can be appropriately diffused in the transverse direction so as to be uniformly introduced into the light guide 20. The light emitted by the surface forward of the light guide 20 is radiated towards the rear of the vehicle through the cover 4. [0031] A description will then be made of a configuration of the light guide. The light guide 20 comprises a base 22, a plurality of rear surface projections (rear surface edges) 24 and a plurality of front surface projections (front surface edges) 26. The base 22 comprises an opposite surface 22a extending in the direction of the arrangement of the light sources 10 (see, for example, the arrow D1 in Fig. 1) so as to face the plurality of light sources 10. [0032] projections of the plurality of rear surface projections 24 are formed so as to be directed towards the light sources 10 from the rear surface 22a of the base 22. On the other hand, the projections of the plurality of front surface projections 26 are formed so as to be directed to the radiation direction of the light sources 10 (towards the rear of the vehicle) from the front surface 22b of the base 22. [0033] The projections of the plurality of rear surface projections 24 are arranged to be separated from one another and the projections of the plurality of front surface projections 26 are arranged to be separated from one another in the direction of the arrangement D1 of the light sources. The plurality of rear surface projections 24 and the plurality of front surface projections 26 are formed as a plurality of projection formation areas 28 of the base 22. Each of the projection training areas 28 has a section, in which the widthwise side of the base 22 becomes the long side. The width direction refers to a direction perpendicular to the arrangement direction D1 and corresponding to the direction of vehicle height (indicated by the arrow D2 in Fig. 2A). Figures 2A and 2B are perspective views illustrating the light guide 20 seen from the side of the front surface. Figure 2B illustrates the front surface projections viewed in a direction opposite to that of Figure 2A. Each projection of the plurality of front surface projections 26 has a polyhedral shape. The polyhedral shape has a plurality of faces (also referred to hereinafter as circumferential faces) Si at S5 which succeed one another in the circumferential direction (indicated by the arrow D3 in FIG. 2A) at least along the front surface 22b of the base. 22. In the present exemplary embodiment, the front surface projection 26 is shaped in eleven-sided form (Si to S11), except for its underside (projection forming area 28) and more circumferential faces Si to S5, has side faces S6 to S8 and S9 to S11. An area 30 between each of the two adjacent surface forming areas 28 on the front surface 22b of the base 22 is subjected to a diffusion treatment (embossing treatment). Figure 3 is a perspective view illustrating a front surface projection 26 of the light guide 20 seen in a direction different from that of Figures 2A and 2B. Of the circumferential faces S1 to S5, the circumferential faces S2 to S4 which correspond to the front side seen from the rear of the vehicle have a shape concave with respect to the width D2 of the base 22. The radius of curvature of the circumferential faces S2 to S4 may be for example about 10 cm. As indicated by hatching in Figure 3, the base 22 may have a curved section (hatched portion) in which the front surface 22b is convex and the rear surface 22a is concave. When the front surface projection 26 is formed on the convexly curved surface, the three-dimensional effect created by the front surface projection 26 is further enhanced. Descriptions of the rear surface projections 24 will then be made. Fig. 4 is a view illustrating a portion of the light guide 20 viewed from the rear surface side. Fig. 5 is a view illustrating the positional relationship between the light guide 20 and the light sources 10. The plurality of rear surface projections 24 includes a plurality of first projections 24a and a plurality of second projections 24b which are arranged alternately. in the direction of the arrangement D1 of the light sources 10. Each of the first projections 24a is disposed on the optical axis of a corresponding source of the plurality of light sources 10 or adjacent thereto. On the other hand, each of the second projections 24b is disposed between two first adjacent projections 24a. Each of the tip ends of the plurality of first projections 24a has a convex shape and each of the tip ends of the plurality of second projections 24b has a concave shape. In other words, by means of the first projections 24a and the second projections 24b, convex steps and concave steps are alternately formed in the direction of the arrangement D1 of the light sources 10. [0039] The configuration of the vehicle lamp 1 has been described in the foregoing. Descriptions of the operation of the lamp for vehicle 1 will then be made. As shown in FIG. 5, the light emitted by the light source 10 is scattered by the inner lens 40 and is incident on the rear surface projections 24 of the light guide 20. Thanks to the inserted inner lens 40, each rear surface projection 24 receives the incident light thereon at various angles. The light incident on the rear surface projections 24 progresses towards the rear side of the vehicle while being reflected several times inside the base 22. In detail, part of the light is introduced into the projections of front surface 26 and the remainder of the light is leaking to different areas of the projection forming areas 28 of the base 22. The light introduced into the front surface projections 26 is radiated towards the rear side of the vehicle through the front surfaces In addition, the areas 30 emit low light due to the light leaking to the areas 30. [0042] The following effects can be achieved by the vehicle lamp 1. the vehicle lamp 1 is on, the light emitted by the light sources 10 and incident on the rear surface projections 24 is introduced into the front surface projection 26 and the light is reflected several times by the plurality of faces of the polyhedral front surface projections 26, so that surface emission with jewel-like gloss and three-dimensional surface emission can be realized. In addition, when the vehicle lamp 1 is extinguished, the external light such as, for example, sunlight, is reflected several times by the plurality of faces of the polyhedral front surface projections 26 and is introduced into the projections of front surface 26 to be reflected several times therein, so that the jewel-like brilliance can be realized. In the vehicle lamp 1, as illustrated in FIG. 3, the circumferential faces S2, S3 and S4 of the front surface projection 26 have a concave shape in the width direction D2. Thus, when the external light such as, for example, sunlight 5 is incident on the front surface projection 26, the light is refracted so as to be diffused with respect to the width direction D2 and the brightness similar to that of jewelry can be reinforced, compared to the case where a front surface projection has convex faces in the direction of the width D2 so as to collect the light. In the vehicle lamp 1, as shown in FIG. 5, the rear surface projections 24 are arranged so that the first projections 24a and the second projections 24b are arranged alternately. Thus, each first projection 24a can collect the light emitted mainly from a light source 10, whose optical axis is shared with the first projection 24a and each second projection 24b can collect light incident obliquely thereon from two sources adjacent light 10 so that the light guide 20 can be illuminated uniformly. In other words, in the present exemplary embodiment, even and uniform light emission can be obtained by a relatively small number of light sources 10, compared to the case where the number of rear surface projections 24 is the same as the number of light sources 10, so that the rear surface projections 24 and the light sources 10 are in one-to-one correspondence. In addition, by providing two surface projections before 26 with respect to a light source 10, the brilliance of a hue of jewelry can be further improved. As illustrated in Figure 3, the base 22 is shaped to have a curved section, so that its front surface 22b has a convex shape. By forming the front surface projection 26 on this curved surface of the base 22, the three-dimensional effect can be enhanced. In addition, by inserting the inner lens 40 between the plurality of light sources 10 and the light guide 20, the light emitted by the light source 10 can be scattered in several directions and the effective directivity can be decreased. . As a result, the point light sensation can be reduced and the vehicle lamp 1 can emit light uniformly. In addition, since the light is incident on the front surface projection 26 in various directions and is reflected several times therein, the jewel-like brilliance can be made to appear. The shiny similar to that of jewelry or the three-dimensional effect mentioned above can contribute to the creation of a sensation of high quality in the vehicle and produce a relatively important added value, in addition to the original function of increase The area 30 between the projection forming areas 28 of the opposite surface 22b of the base 22 is embossed. Through the embossing process, the light-emitting parts of a jewel hue (projection forming areas 28) and the light-emitting portions of a matte hue (areas 30 between the projection forming areas 28) appear alternately and because of the contrast between them, the hue of jewelry can be further enhanced and the three-dimensional effect can be created. This description has been made above based on an exemplary embodiment. One skilled in the art can understand that the exemplary embodiment is provided merely for purposes of explanation and that various modifications can be made by a combination of respective components and the modifications also fall within the scope of the present disclosure. . Such modifications will be described below. (Modification 1) [0051] Although the exemplary embodiment described above forms the front surface projection 26 in eleven-sided form, the shape of the front surface projection 26 is not limited thereto. For example, the side faces S6 to S8 may form a single plane and similarly, the side faces S8 to S11 opposite to the side faces S6 to S8 may also form a single plane. (Modification 2) [0052] Figure 6 is a perspective view illustrating a front surface projection 26 according to a modification. As illustrated in FIG. 6, the number of circumferential faces of the front surface projection 26 which succeed one another in the circumferential direction D3 of the front surface projection 26 may be equal to four. In this case, the front surface projection 26 may have an eight-sided shape, except for its underside. Alternatively, the number of successive faces in the circumferential direction D3 may be greater than or equal to six. It can be understood that the gloss of a hue of jewels mentioned above is created by the edges E1 to E4 defining the boundaries of the circumferential faces Si at S5 (Si to S4) of FIGS. 2A and 28 and the edges E at E3 defining the boundaries of the circumferential faces Si to S4 of Figure 6. In this regard, the number of edges defining the boundaries of the circumferential faces may be at least two, and more particularly, at least equal to three. In a variant, the front surface projection 26 of FIG. 6 and the front surface projection 26 of FIG. 2 may be used in combination. In addition, in the case where front surface projections 26 having different shapes are formed in combination, the shapes of the plurality of front surface projections 26 may gradually and successively vary in the direction of the light source arrangement D.sub.l. As a result, different shades of jewelry, in which part of a vehicle lamp 1 has a fine hue of jewelry and another part of the vehicle lamp 1 has a coarse tint of jewelry can be created. (Modification 3) [0055] In the case where the directivity of the light sources 10 is not very important, the inner lens 40 may be omitted. (Modification 4) [0056] Although a rear lamp has been described as a type of vehicle lamp 1 in the exemplary embodiment described above, the present description can be applied to a combination lamp rear which is disposed at an angle of the vehicle. From the foregoing, it will be understood that various embodiments of the present disclosure have been described herein for purposes of explanation and that various modifications can be made without departing from the scope and spirit. of the present description. Accordingly, the various embodiments described herein are not intended to be limiting, the actual scope and the spirit being indicated by the following claims.
    权利要求:
    Claims (8)
    [0001]
    REVENDICATIONS1. A vehicle lamp (1) characterized by comprising: a plurality of light sources (10) arranged in a row; a light guide (20) configured to receive the light emitted from the plurality of light sources (10) on its rear surface, and to emit light through its front surface, wherein the light guide (20) comprises: a base (22) having a rear surface facing the plurality of light sources (10) and extending in the direction of the arrangement of the plurality of light sources (10); a plurality of rear surface projections (24) projecting from the rear surface of the base (22); and a plurality of front surface projections (26) projecting from the front surface of the base (22), wherein the plurality of rear surface projections (24) and the plurality of front surface projections (26) are arranged in the direction of the arrangement so as to be separated from each other, and are respectively formed as a plurality of projection forming areas (28), each of the projection forming areas (28) having a section cross-section, in which the widthwise side of the base, which is perpendicular to the direction of the arrangement, becomes the longer side, and wherein each projection of the plurality of front surface projections (26) has a polyhedral shape including a plurality of successive faces in its circumferential direction.
    [0002]
    The vehicle lamp (1) according to claim 1, wherein each face of the plurality of faces has a concave shape in the direction of its width.
    [0003]
    A vehicle lamp (1) as claimed in claims 1 to 2, wherein the faces of the plurality of faces alternate in the circumferential direction along the front surface of the base.
    [0004]
    The vehicle lamp (1) according to claims 1 to 2, wherein the plurality of rear surface projections (24) comprises: a plurality of first projections (24a), each of which is disposed on or adjacent to the optical axis of a corresponding source of the plurality of light sources (10); and a plurality of second projections (24b), each of which is disposed between two adjacent first projections, and wherein the tip end of each projection of the plurality of first projections (24a) has a convex shape and the the tip end of each projection of the plurality of second projections (24b) has a concave shape.
    [0005]
    The vehicle lamp (1) according to claims 1 to 3, further comprising: an inner lens inserted between the plurality of light sources (10) and the light guide.
    [0006]
    Vehicle lamp (1) according to claims 1 to 5, wherein at least one projection of the plurality of front surface projections (26) is formed in eleven-sided form except for its underside.
    [0007]
    The vehicle lamp (1) according to claims 1 to 6, wherein the area of the front surface of the base (22) between each of two adjacent projection forming areas (28) is subject to a diffusion treatment.
    [0008]
    Vehicle lamp (1) according to claims 1 to 7, wherein the shape of the projections of the plurality of front surface projections (26) varies progressively in the direction of the arrangement.
    类似技术:
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    同族专利:
    公开号 | 公开日
    JP2016062844A|2016-04-25|
    CN105444082A|2016-03-30|
    US20160084467A1|2016-03-24|
    DE102015218056A1|2016-03-24|
    JP6445818B2|2018-12-26|
    FR3026161B1|2020-02-21|
    US9890920B2|2018-02-13|
    CN105444082B|2019-04-16|
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    优先权:
    申请号 | 申请日 | 专利标题
    JP2014191862A|JP6445818B2|2014-09-19|2014-09-19|Vehicle lighting|
    JP2014191862|2014-09-19|
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