• 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 projection lens (13) is arranged such that light (L1, L2, L3, L4, L5) emitted from a light source (11) passes through the projection lens (13). A mask (14) is disposed at the rear of the projection lens (13) to block a portion of the light (L1, L2, L3, L4, L5) emitted by the light source (11). The projection lens (13) has a first region (13a) and a second region (13b). The first region (13a) has a first property of light scattering. The second region (13b) has a second light scattering property lower than the first light scattering property. The mask (14) and the projection lens (13) are arranged so that a portion (L2) of the light (L2, L3) projecting an edge (14a) of the mask (14) as a peripheral edge (50a ) a light distribution pattern (50) passes through the first region (13a) and another portion (L3) of the light (L2, L3) projecting the edge (14a) of the mask (14) passes through the second region ( 13b).
    公开号:FR3017926A1
    申请号:FR1551568
    申请日:2015-02-24
    公开日:2015-08-28
    发明作者:Akinori Matsumoto；Shingo Kato
    申请人:Koito Manufacturing Co Ltd；
    IPC主号:
    专利说明:

    [0001] BACKGROUND Technical Field Examples of embodiments of the invention relate to a lamp unit for mounting on a vehicle.
    [0002] Associated Technique A unit comprising a light source, a projection lens and a mask is known as a lamp unit of this type. The projection lens is arranged such that at least a portion of the light emitted by the light source passes through the projection lens. The mask is disposed at the rear of the projection lens so as to block a portion of the light emitted by the light source. Light passing through the projection lens forms a light distribution pattern that illuminates an area in front of the lamp unit. On this occasion, an edge of the mask projects in front of the projection lens as the peripheral edge of the light distribution pattern. A dipped beam pattern that illuminates an area in front of the vehicle a short distance so as not to dazzle the vehicles moving in front is given as an example of a light distribution pattern. A cut line that forms the top edge of the low beam pattern is exemplified as a peripheral edge of the light distribution pattern. There is a demand for blurring the cutting line to improve forward visibility and to remove the feeling of discomfort felt by a driver. To meet this demand, a configuration is known in which a light scattering surface is formed on a surface of the projection lens so that the light projecting the edge of a mask passes through the light scattering surface (see FIG. Example JP 2007-265864 A (corresponding to US 7,736,036 B2)).
    [0003] SUMMARY For lamp units of this type, the aiming work to adjust the reference position of the optical axis of the projection lens in the up, down, left and right directions is performed, for example, before delivery. On this occasion, the cutting line can be used as a reference for the adjustment work. However, if the cut line is dimmed as described above, it is difficult to use the cut line as a reference for the adjustment job. Job performance can deteriorate. An exemplary embodiment of the invention improves the efficiency of the aiming work by ensuring forward visibility and eliminating the feeling of discomfort felt by a driver. (1) According to an exemplary embodiment, a lamp unit intended to be mounted on a vehicle comprises a light source, a projection lens and a mask. The projection lens is arranged so that the light emitted by the light source passes through the projection lens. The mask is disposed at the rear of the projection lens so as to block a portion of the light emitted by the light source. The projection lens has a first region and a second region. The first region has a first property of light scattering. The second region has a second light scattering property lower than the first light scattering property. The mask and the projection lens are arranged so that (i) a portion of the light projecting an edge of the mask as the peripheral edge of a light distribution pattern 20 passes through the first region and (ii) another portion light projecting the edge of the mask passes through the second region. Light passing through the first region is relatively dispersed. As a result, the edge of the mask projects as a faded peripheral edge into the light distribution pattern that is formed in front of the lamp unit. It is therefore possible to meet the demand for improved forward visibility and to eliminate the feeling of discomfort felt by a driver. On the other hand, light passing through the second region is not dispersed (or the degree of dispersion is relatively low). As a result, the edge of the mask projects as a sharp peripheral edge into the light distribution pattern, which is formed in front of the lamp unit. That is, the net peripheral edge can be seen together with the dimmed peripheral edge formed by light passing through the first region. Thus, when a sighting job is performed for the lamp unit, the net peripheral edge can be used as a reference for the setting. It is therefore possible to improve the performance of the sight work by ensuring forward visibility and removing the feeling of discomfort felt by a driver. (2) In the lamp unit according to (1), the mask and the projection lens may be arranged so that light forming a part, not including the peripheral edge, of the illumination area of the light distribution passes through the second region. With this configuration, the part that does not have the peripheral edge of the illumination area of the light distribution pattern formed in front of the lamp unit is formed by light that is not scattered ( or whose degree of dispersion is low). The level of disturbance of this light is sufficiently low to be able to suppress the formation of a part with irregular illumination in the lighting zone. It is therefore possible to further remove the feeling of discomfort felt by the driver by ensuring visibility forward and improving the performance of the sighting. (3) The lamp unit according to any one of (1) to (2) may further comprise a reflector which reflects the light emitted by the light source and passes it through the second region of the projection lens. as light that illuminates an overhead sign. With this configuration, the light for illuminating the upwardly directed air panel after passing through the projection lens is not dispersed (or the degree of dispersion is low). It is therefore possible to prevent the illumination light of the overhead panel from moving toward a vehicle traveling ahead due to dispersion. It is therefore possible not only to improve the performance of the aiming work by ensuring forward visibility and to remove the feeling of discomfort felt by the driver but also to suppress the glare caused by one or more occupants of a vehicle traveling in front. (4) In the lamp unit according to any one of (1) to (3), the projection lens may be a resin molded object. With this configuration, a surface having minute irregularities to obtain the first light scattering property can be formed in the first region at low cost and precisely. On the other hand, one can distinguish the surface states of the first region and the second region at low cost and precisely. Thus, the dimmed peripheral edge and the net peripheral edge can be formed precisely in desired positions. A lamp unit capable of improving the performance of the aiming work while ensuring forward visibility and eliminating the feeling of discomfort felt by the driver can therefore be provided at low cost. (5) The lamp unit according to any of (1) to (4) may further include a support. The support holds the peripheral edge portion of the projection lens. The peripheral edge portion of the projection lens is welded to the support. Protrusions for welding positioning are formed in the peripheral edge portion of the projection lens. With this configuration, the first region and the second region to achieve the desired light scattering properties can be accurately positioned relative to the medium. As a result, the dimmed peripheral edge and the sharp peripheral edge can be formed precisely in desired positions. It is therefore possible to improve the performance of the aiming work while ensuring the visibility forward and the removal of the feeling of discomfort felt by the driver.
    [0004] BRIEF DESCRIPTION OF THE DRAWINGS The invention will be better 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. Figure 1 is a view partially showing in section a lamp unit according to a first embodiment of the invention; Figs. 2A to 2C are views for explaining the light distribution pattern formed by the lamp unit; Figure 3 is a front view showing the external appearance of a projection lens provided in the lamp unit; and Fig. 4 is a view partially showing in section a lamp unit according to a second exemplary embodiment of the invention. DETAILED DESCRIPTION Exemplary embodiments will be described below in detail with reference to the accompanying drawings. In each drawing to which reference will be made in the following description, the scale will be appropriately modified to represent each element with recognizable dimensions. Fig. 1 is a side view in which a lamp unit 10 according to a first exemplary embodiment is viewed from the left and a portion of the lamp unit 10 is shown in section. The lamp unit 10 is, for example, mounted on the front part of a vehicle and used to illuminate an area in front of the vehicle. The lamp unit 10 is provided with a light source 11. In this exemplary embodiment, the light source 11 is a semiconductor light emitting element. Examples of a semiconductor light emitting element include a light emitting diode (LED), a laser diode, an organic electroluminescent element, and the like. The lamp unit 10 is provided with a reflector 12. The reflector 12 has a reflection surface 12a. The reflection surface 12a has a shape based on an elliptical sphere whose main axis 20 coincides with an optical axis A extending forwardly and rearwardly of the lamp unit 10. The light source 11 is disposed at the first focus of an ellipse constituting the vertical section of the reflection surface 12a. With this configuration, the light emitted by the light source 11 is focused at the second focus of the ellipse.
    [0005] The lamp unit 10 is provided with a projection lens 13. The projection lens 13 is arranged such that the rear focus F of the projection lens 13 coincides with the second focus of the reflection surface 12a of the reflector 12 The projection lens 13 is arranged so that at least a portion of the light emitted by the light source 11 passes through the projection lens 13. Accordingly, an image at the rear focus F is projected forwardly. of the lamp unit 10 as an inverted image. The lamp unit 10 is provided with a mask 14. The mask 14 is disposed at the rear of the projection lens 13. More specifically, the mask 14 is disposed near the rear focus F of the projection lens 13. The mask 14 is arranged to block a portion of the light emitted by the light source 11. In the example shown in Figure 1, the light L1 emitted by the light source 11 is blocked by the mask 14 Fig. 2A is a front view showing the shape of the mask 14 viewed from the front of the lamp unit 11. Fig. 2B schematically shows a dipped beam pattern 50 (example of light distribution pattern) formed by the lamp unit 10. In Figs. 2A and 2B, a virtual line V indicates a vertical reference line and a virtual line H indicates a horizontal reference line. The dipped beam pattern 50 is a light distribution pattern with which an area in front of the vehicle is illuminated for a short distance so as not to dazzle vehicles moving in front. The dipped beam pattern 50 has a cut line 50a (exemplary peripheral edge of the light distribution pattern) at its upper edge. The cutting line 50a is formed by projecting the shape of the upper edge 14a of the mask 14 in front of the projection lens 13 by the light emitted by the light source 11. The area located above the cutting line 50a is a non-illumination zone formed by blocking the light emitted by the light source 11 by means of the mask 14. The area below the cutting line 50a is a lighting zone 50b formed by the light which is emitted by the light source 11 and which is not blocked by the mask 14. FIG. 3 is a front view showing the external appearance of the projection lens 13. The virtual lines V and H of FIG. correspond to the virtual lines V and H of Figure 2. The projection lens 13 comprises a first region 13a and a second region 13b. The first region 13a has a first light scattering property which is formed by minute irregularities formed in its surface. The tiny irregularities are formed by protuberances (wrinkles), grooves, surface texture, etc. The second region 13b is made in a regular surface. Accordingly, the second region 13b has a second light scattering property which is smaller than the first light scattering property. As shown in FIG. 1, the projection lens 13 and the mask 14 are arranged so that (i) a portion L2 of the light, which projects the upper edge 14a of the mask 14 as a cutting line 50a, passes through the first region 13a and (ii) another portion L3 of the light passes through the second region 13b. The surface having minute irregularities formed in the first region 13a disperses the light L2. As a result, the upper edge 14a of the mask 14 projects as a blunted cut line 50a1 (thick gray line) into the low beam pattern 50 shown in FIG. 2B. It is therefore possible to meet the demand for improved forward visibility and to eliminate the feeling of discomfort felt by the driver. On the other hand, the light L3 passing through the second region 13b is not subject to dispersion (or the degree of dispersion is low). As a result, the upper edge 14a of the mask 14 projects as sharp cut lines 50a2 (thin solid line) in the low beam pattern 50 shown in FIG. 2B. That is, the dimmed cutting line 50a1 formed by the light L2 passing through the first region 13a and the sharp cutting line 50a2 formed by the light L3 passing through the second region 13b can be seen at the same time. Thus, when a sighting job is performed for the lamp unit 10, the clean cutting line 50a2 can be used as a reference for the setting. It is therefore possible to improve the performance of the aiming work while ensuring visibility forward and removing the feeling of discomfort felt by the driver. A dipped beam pattern 150 according to a comparative example shown in FIG. 2C shows the case where a lighting zone 150b including a cutting line 150a is formed only by the scattered light. The shape of the edge of the mask projects as a cut line 150a which is dimmed. On the other hand, the scattered light causes a disturbance so as to form an irregular illumination 150b1 in the lighting zone 150b. This irregular lighting gives the driver a feeling of discomfort. In this exemplary embodiment, as shown in FIG. 1, the projection lens 13 and the mask 14 are arranged so that the light L4 forming a part, which does not have the cutting line 50a, of the zone d The illumination 50b of the low beam pattern 50 passes through the second region 13b. That is to say that light from the light source 11 which is not blocked by the mask 14, the light L4 which does not contribute to the projection of the upper edge 14a of the mask 14 passes through the second region 13b. With this configuration, the illumination area 50b of the dipped beam pattern 50 shown in FIG. 2B is formed by light that is not scattered (or whose degree of dispersion is small). The degree of disturbance of this light is sufficiently low to be able to suppress the formation of irregular illumination in the lighting zone 50b. It is therefore possible to further remove the feeling of discomfort felt by the driver while ensuring visibility forward and improving the performance of the sighting. The material of the projection lens 13 is not particularly limited. In this exemplary embodiment, a projection lens 13 is used which is a resin molded object.
    [0006] In this case, the surface having minute irregularities to obtain a desired light scattering property can be formed in the first region 13a at low cost and precisely. On the other hand, it is possible to distinguish the surface states of the first region 13a and the second region 13b at low cost and precisely. As a result, the blunted cutting line 50a1 and the sharp cutting line 50a2 can be formed precisely in the desired positions. Thus, a lamp unit capable of improving the performance of the aiming work while ensuring forward visibility and removing the feeling of discomfort felt by the driver can be provided at low cost.
    [0007] As shown in Fig. 1, the lamp unit 10 is provided with a lens holder 15. The lens holder 15 holds a peripheral edge portion 13c of the projection lens 13. The peripheral edge portion 13c is welded to the lens holder 15. As shown in Fig. 3, a plurality of weld positioning protrusions 13d are formed in the peripheral edge portion 13c. With this configuration, the first region 13a and the second region 13b to obtain the desired light scattering properties can be positioned precisely with respect to the lens holder 15. Accordingly, the blurred cutting line 50a1 and the clean cutting line 50a2 can be formed precisely in desired positions. It is therefore possible to improve the performance of the aiming work while ensuring the visibility forward and removing the feeling of discomfort felt by the driver. Fig. 4 is a side view of a lamp unit 10A according to a second exemplary embodiment, seen from the left side thereof.
    [0008] Elements and / or functions having a structure similar or similar to that of the lamp unit 10 according to the first exemplary embodiment will receive the same reference numbers and their redundant description will be omitted. On the other hand, the light rays L1 to L4 shown in Figure 1 will not be shown.
    [0009] The lamp unit 10A is provided with additional reflectors 16a, 16b (the support structure of the additional reflectors 16a, 16b is not shown). The additional reflectors 16a, 16b are configured to reflect L5 light emitted by the light source 11 so as to form light that illuminates an overhead panel. "Air Panel" means a road sign that is located above and in front of a vehicle that passes over a driver's head while the vehicle is moving and the like. The additional reflectors 16a, 16b are arranged so that light to illuminate the overhead panel passes through the projection lens 13 by avoiding the first region 13a. In other words, the additional reflectors 16a, 16b are arranged so that the light to illuminate the overhead panel passes through the second region 13b of the projection lens 13. With this configuration, the light L5 to illuminate the overhead panel upward after passing through the projection lens 13 is not dispersed (or the degree of dispersion is low). It is therefore possible to prevent light L5 to illuminate the overhead panel to move towards a vehicle traveling in front due to dispersion. As a result, it is possible not only to improve the performance of the aiming work by ensuring forward visibility and to remove a feeling of discomfort felt by the driver but also to suppress the glare caused to or passengers of a vehicle traveling in front. The exemplary embodiments mentioned above are intended to facilitate the understanding of the invention, but not to limit the invention. It is obvious that the invention can be transformed or modified without departing from its meaning and any equivalent of the invention is included in the invention. In the exemplary embodiments mentioned above, the semiconductor light emitting element is used as a light source 11. However, a lamp light source such as an incandescent lamp, a halogen lamp a discharge lamp or a neon lamp may be used. In the exemplary embodiments mentioned above, the reflector 12 has a reflection surface 12a whose shape is based on an elliptical sphere. However, the shape of the reflective surface 12a can be any shape since the light L2 and the light L3 which are emitted by the light source 11 and project the upper edge 14a of the mask 14 as a line of light. cut 50a of the beam of low beam 50 cross respectively the first region 13a and the second region 13b of the projection lens 13. Alternatively, the reflector 12 may be deleted. In the exemplary embodiments mentioned above, the upper edge 14a of the mask 14 is projected as the peripheral edge of the light distribution pattern which is formed in front of the lamp unit 10. However, the shape of the mask 14 and the position of the edge to be projected can be desirably adjusted to the extent that a desired peripheral edge shape can be projected. In the second exemplary embodiment, the additional reflectors 16a, 16b are exemplified as independent optical portions. However, the additional reflector 16a and the mask 14 may be a single element. As a variant, the additional reflector 16b and the mask 14 may constitute a single element. On the other hand, one of the additional reflectors 16a, 16b can be omitted since the light L5 for illuminating the air panel passes through the projection lens 13 by avoiding the first region 13a. In the exemplary embodiments mentioned above, the first region 13a of the projection lens 13 is formed of the surface having minute irregularities, and the second region 13b is formed of the smooth surface. However, an irregular structure may be formed in the second region 13b since the second light scattering property of the second region 13b is less than the first light scattering property of the first region 13a. .
    [0010] REFERENCE NUMBER DESCRIPTION 10: lamp unit 11: light source 13: projection lens 13a: first region 13b: second region 13c: peripheral edge portion 13d: protuberance 14: mask 14a: upper edge of mask 16a , 16b: additional reflectors 50: dipped beam pattern 50a: cut line L1: light blocked by the mask L2, L3: light projecting the upper edge of the mask 20 L4: light not blocked by the mask
    权利要求:
    Claims (5)
    [0001]
    REVENDICATIONS1. A lamp unit (10, 10A) for mounting on a vehicle, the lamp unit comprising: a light source (1); a projection lens (13) which is arranged so that the light (L1, L2, L3, L4, L5) emitted by the light source (11) passes through the projection lens (13); and a mask (14) which is disposed at the rear of the projection lens (13) so as to block a portion (L1) of the light (L1, L2, L3, L4, L5) emitted by the light source (11), the lamp unit being characterized in that the projection lens (13) has a first region (13a) having a first light scattering property, and a second region (13b) having a second property of light scattering less than the first light scattering property, and the mask (14) and the projection lens (13) are arranged so that (i) a portion (L2) of the light (L2, L3) projecting an edge (14a) of the mask (14) as a peripheral edge (50a) of a light distribution pattern (50) passes through the first region (13a) and (ii) another portion (L3) of the light (L2, L3) projecting the edge (14a) of the mask (14) passes through the second region (13b).
    [0002]
    The lamp unit according to claim 1, wherein the mask (14) and the projection lens (13) are arranged so that light forming a portion, not including the peripheral edge (50a), of the area lighting (50b) of the light distribution pattern (50) passes through the second region (13b).
    [0003]
    The lamp unit according to any one of claims 1 to 2, further comprising: a reflector (16a, 16b) which reflects a portion (L5) of the light (L1, L2, L3, L4, L5) emitted by the light source (11) and makes it pass through the second region (13b) of the projection lens (13) as light that illuminates an overhead panel. 35
    [0004]
    The lamp unit according to any one of claims 1 to 3, wherein the projection lens (13) is a resin molded object. 301 792 6 13
    [0005]
    The lamp unit according to any one of claims 1 to 4, further comprising: a support (15) which holds the peripheral edge portion (13c) of the projection lens (13), wherein the portion of peripheral edge (13c) of the projection lens (13) is welded to the support (15), and protuberances (13d) for the positioning of the weld are formed in the peripheral edge portion (13c) of the projection lens (13). ).
    类似技术:
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    同族专利:
    公开号 | 公开日
    US20150241008A1|2015-08-27|
    KR20150100517A|2015-09-02|
    JP6663164B2|2020-03-11|
    CN104964229B|2018-11-06|
    FR3017926B1|2019-01-25|
    US9689547B2|2017-06-27|
    CN104964229A|2015-10-07|
    JP2015173096A|2015-10-01|
    DE102015203260A1|2015-08-27|
    引用文献:
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    JP4671852B2|2005-12-08|2011-04-20|株式会社小糸製作所|Vehicle lighting|
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    JP2012059551A|2010-09-09|2012-03-22|Koito Mfg Co Ltd|Vehicular headlight|
    JP5763475B2|2011-08-25|2015-08-12|株式会社小糸製作所|Lighting fixtures for vehicles|
    JP5893348B2|2011-11-09|2016-03-23|株式会社小糸製作所|Laser welded structure|
    JP2013239408A|2012-05-17|2013-11-28|Koito Mfg Co Ltd|Vehicular headlight|
    JP6011915B2|2012-07-18|2016-10-25|株式会社小糸製作所|Vehicle headlamp|JP2017103189A|2015-12-04|2017-06-08|パナソニックＩｐマネジメント株式会社|Headlamp and movable body|
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    JP2019194947A|2018-05-01|2019-11-07|株式会社小糸製作所|Lamp unit|
    法律状态:
    2015-12-29| PLFP| Fee payment|Year of fee payment: 2 |
    2017-01-09| PLFP| Fee payment|Year of fee payment: 3 |
    2017-12-27| PLFP| Fee payment|Year of fee payment: 4 |
    2018-04-06| PLSC| Publication of the preliminary search report|Effective date: 20180406 |
    2020-01-13| PLFP| Fee payment|Year of fee payment: 6 |
    2021-01-13| PLFP| Fee payment|Year of fee payment: 7 |
    2022-01-18| PLFP| Fee payment|Year of fee payment: 8 |
    优先权:
    申请号 | 申请日 | 专利标题
    JP2014033057|2014-02-24|
    JP2014033057|2014-02-24|
    JP2015005967A|JP6663164B2|2014-02-24|2015-01-15|Vehicle lighting unit|
    JP2015005967|2015-01-15|
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