• 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 (10) has a projection lens (12) which is disposed on an optical axis extending in the longitudinal direction of the vehicle, an LED (14) which emits light directed towards the rear focus (F) the projection lens (12), an LED (16) which emits light which is directed towards the rear focus (F) of the projection lens (12), and a mask (22) which can only forming a light distribution pattern having a first cutting line by cutting out a portion of the light emitted by the LED (14) but also forming a second light distribution pattern having a second cutting line by cutting a portion of the light emitted by the LED (16). The mask (22) is disposed so that its leading edge (22a) is positioned further back than the back focus (F).
    公开号:FR3017188A1
    申请号:FR1550894
    申请日:2015-02-05
    公开日:2015-08-07
    发明作者:Takahiko Honda
    申请人:Koito Manufacturing Co Ltd；
    IPC主号:
    专利说明:

    [0001] Technical Fields The present invention relates to a vehicle lamp. BACKGROUND OF THE INVENTION Vehicle lamps have conventionally been designed in which a plurality of light sources are arranged in a lamp unit and the light sources are individually controlled to be switched on and off so that the light distribution patterns light produced by the light sources may be switched between a low beam light distribution pattern and a high beam light distribution pattern. For example, a vehicle lamp unit is imagined, including a projection lens, a reflector configured to reflect direct light from a first light source which is disposed further back than the back focus of the projection lens to forward while directing it towards the optical axis of the projection lens, a cutting line forming member which is disposed between the projection lens and the first light source so that its leading edge is positioned near the projection lens focal point of the projection lens so as to cut a portion of light from the reflected light which passes below the back focus to thereby form a cutting line for a low beam light distribution pattern and an additional reflector configured to collect light from a second light source in the vicinity of the rear focus of the projection lens (refers to r to JP-A-2008- 123753). In this vehicle lamp unit, light from the second light source is collected in the vicinity of the rear focus of the projection lens in a state such that the leading edge of the line-cutting member and the focus rear of the projection lens are relatively spaced from one another, thereby forming a high beam light distribution pattern. SUMMARY OF THE INVENTION In the vehicle lamp unit described above, however, the cutting line forming member moves to a position where light from the first light source and light from the second light source are not cut off during the formation of the high beam light distribution pattern. For this reason, the light distribution pattern that is formed by light from the first and second light sources does not have a cutting line. In addition, in the vehicle lamp unit described above, in the case where the cutting line forming member which is provided is disposed in a position where the two parts at the same time, the part of the light from the first light source and the portion of the light from the second light source are cut off (i.e., a position behind the back focus of the projection lens), the two light distribution comprise a cutting line. When this occurs, an unlit area is produced between the two light distribution patterns, depending on the shape of the cut line forming member. The present invention has been realized in view of these situations and an object thereof is to provide a vehicle lamp capable of forming a plurality of light distribution patterns by a plurality of light sources and a mask such that the two patterns of light distribution partially overlap. To solve the problem, according to one aspect of the present invention, there is provided a vehicle lamp including a projection lens which is disposed on an optical axis which extends in the longitudinal direction of the vehicle, a first light source which emits light which is directed towards the rear focus of the projection lens, a second light source which emits light which is directed towards the rear focus of the projection lens and a mask which can not only form a first pattern of light distribution comprising a first cutting line by cutting off a part of the light emitted by the first light source but also by a second light distribution pattern comprising a second cutting line by cutting off a portion of the light emitted by the second light source. The mask is arranged so that its front end portion is positioned further back than the back focus.
    [0002] According to this configuration, not only the light passing in front of the rear focus of the projection lens but also the partial light passing behind the back focus of the projection lens contribute to the formation of the first light distribution pattern and the second pattern. light distribution. This allows the first light distribution pattern and the second light distribution pattern to overlap partially, thereby limiting the production of an unlit area between the two light distribution patterns. The mask may be configured to have the first cut line and the second cut line form a horizontal cut line from the center to areas near their left and right ends. This makes it possible to obtain preferable light distribution patterns, for example for a motorcycle. The mask may be arranged so that its front end portion is facing the focal curve of the projection lens and may be shaped into a shape in which the distance between the front end portion and the focal curve in a region which is very far from the optical axis is greater than the distance between the front end portion and the focal curve in an area near the optical axis. This makes it possible to modify the shape of the cutting line of the light distribution pattern formed away from the optical axis at these two end portions. The vehicle lamp may further include a first reflector configured to reflect light emitted from the first light source to the projection lens while directing it to the optical axis and a second reflector that is disposed on the opposite side to the side where the first reflector is provided on either side of the optical axis and is configured to reflect the light emitted by the second light source towards the projection lens while directing it towards the optical axis. The mask may be configured not only to form a dipped beam light distribution pattern having a first score line in an upper edge portion but also to form a high beam light distribution pattern having a second line of light. cutting in a lower edge part. This makes it possible to form different cutting lines in the individual light distribution patterns. The mask may be configured to allow areas of the first light distribution pattern and the second light distribution pattern to overlap partially. This can improve the brightness of the illuminated area when the first light distribution pattern and the second light distribution pattern overlap. The mask may be arranged so that the front end portion is positioned more upward than the back focus. This can decrease the patterned light among the first light distribution pattern and the second light distribution pattern and increase the light that forms the other pattern among the first light distribution pattern and the second pattern of distribution of light. light. Arbitrary combinations of the constituent elements described above and modifications of representation of the invention between process, device, system and the like are also effective as forms of the invention. According to the present invention, it is possible to provide the vehicle lamp in which the two light distribution patterns partially overlap. 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. Figure 1 is a vertical sectional view of a vehicle lamp according to a first embodiment. Figure 2 is a schematic view of the vehicle lamp according to the first embodiment, seen from above, illustrating the shape of a mask. Fig. 3 is a schematic view of an exemplary light distribution pattern formed by the vehicle lamp according to the first embodiment. Figures 4 (a) to 4 (h) each illustrate the relationship between the position of the front end of the mask with respect to the rear focus F of a projection lens and the light distribution patterns formed.
    [0003] Figure 5 is a vertical sectional view of a vehicle lamp according to a second embodiment, showing a brief configuration thereof. Fig. 6 is a vertical sectional view of a vehicle lamp according to a third embodiment, showing a brief configuration thereof. Fig. 7 is a resultant light ray diagram in the state where the vehicle lamp forms a dipped beam distribution pattern (PL) and an overhead light (OHS).
    [0004] Fig. 8 is a resultant light ray diagram in the state where the vehicle lamp forms a high beam light distribution pattern (PH). DESCRIPTION OF THE EMBODIMENTS Referring to the drawings, the invention will be described hereinafter based on preferred embodiments. Similar reference numerals will be given to similar or similar components, organs and processes, which are shown in the drawings, so as to omit the repetition of their similar descriptions. The embodiments described herein are not intended to limit the invention but are intended to show examples thereof, and all of their features and combinations that are described in the embodiments are not necessarily essential to the invention. (First Embodiment) Fig. 1 is a vertical sectional view of a vehicle lamp according to a first embodiment. Figure 2 is a schematic view of the vehicle lamp according to the first embodiment, seen from above, illustrating the shape of a mask. Figure 3 is a schematic view of an exemplary light distribution pattern formed by the vehicle lamp according to the first embodiment. A vehicle lamp 10 according to a first embodiment of the invention is used as a vehicle headlight in which light distribution patterns can be switched. The vehicle lamp 10 comprises a projection lens 12 which is disposed on an optical axis Ax which extends in the longitudinal direction of a vehicle, LEDs (light emitting diodes) 14, 16, which constitute a first light source and a second source of lights which are arranged towards the rear of the projection lens 12, a first reflector 18 configured to reflect the light emitted upwards by the LED 14 which is arranged further back than the rear focus F of the lens 12 to the front while directing it towards the optical axis Ax, a second reflector 20 configured to reflect the light emitted downwards by the LED 16 which is arranged further back than the rear focus F of the lens of projection 12 forward while directing it towards the optical axis Ax and a mask 22 which is arranged so that a front edge 22a is positioned in an area between the projection lens 1 2 and LEDs 14, 16. In general, a plano-convex lens, in which the front surface is in the form of a convexly curved surface and the rear surface is in the form of a flat surface, is used as a projection lens 12. The projection lens 12 is arranged such that a line connecting the upper end and the lower end of a rear end face which is the flat surface facing the first reflector 18 becomes parallel to the vertical.
    [0005] The LEDs 14, 16 are, for example, white light-emitting diodes each having a single light-emitting chip of substantially one square millimeter or a rectangular light-emitting portion in which a plurality of chips are aligned. The LEDs 14, 16 are mounted on a substrate such that the LEDs 14, 16 are respectively attached to the upper surface and lower surface of a base portion 24. The LED 14 emits light directed toward the back focus F of the projection lens 12 and the LED 16 emits light directed towards the rear focus F of the projection lens 12.
    [0006] The LED 14 is illuminated not only when forming a dipped beam light distribution pattern as the first light distribution pattern but also when forming a high beam light distribution pattern. as the second light distribution pattern, while the LED 16 is illuminated during the formation of the high beam light distribution pattern. The first reflector 18 has a reflecting surface 18a which is substantially ellipsoidly formed around the optical axis Ax as a central axis. This reflecting surface 18a is formed such that the cross-sectional shape including the optical axis Ax becomes substantially elliptical. The LED 14 is disposed near the first focus F1 of an ellipse which is formed by a vertical section of the reflecting surface 18a including the optical axis Ax. By arranging the LED 14 in this manner, the reflective surface 18a reflects forward light from the LED 14 while pointing toward the optical axis Ax. When this occurs, the light is converged substantially to the second focus F2 of the ellipse in the vertical section including the optical axis Ax. In this embodiment, this second focus F2 substantially coincides with the rear focus F of the projection lens 12. The second reflector 20 has a reflective surface 20a which is substantially ellipsoidly formed around the axial axis Ax as the central axis. This reflecting surface 20a is formed so that the sectional shape including the optical axis Ax becomes substantially elliptical. The LED 16 is disposed near the first focus F1 '20 of an ellipse which is formed by the vertical section of the reflecting surface 20a including the optical axis Ax. By arranging the LED 16 in this manner, the reflecting surface 20a reflects forward light from the LED 16 while directing it towards the optical axis Ax. When this occurs, the light is converged substantially to the second focus F2 of the ellipse in the vertical section including the optical axis Ax. The shapes of the reflective surfaces of the first reflector 18 and the second reflector 20 are selected or modified precisely as necessary depending on the shapes of the required light distribution patterns and may be different from each other. The mask 22 configured to form the cutting lines is a light-cutting element which partially intersects the light emitted by the LED 14, and then reflects on the reflecting surface 18a of the first reflector 18. The front edge 22a of the mask 22 is positioned further back (to the right in FIG. 1) than the rear focus F. For this reason, as shown in FIG. 2, a gap G is defined between the arcuate front edge 22a of the mask 22 and a 301 7 1 8 8 8 focal lens FL lens which is formed by continuously connecting the rear foci F of the projection lens 12. For this reason, in the vehicle lamp 10, not only the light that passes in front of the back focus F of the projection lens 12 5 but also the partial light which passes behind the rear focus F of the projection lens 12, that is to say the light which passes between the front edge 22a and the rear focus F (curve focal length FL lens), contribute to the formation of the first light distribution pattern and the second light distribution pattern. The mask 22 has the leading edge 22a which is shaped in accordance with the light distribution patterns intended to be projected forward. As shown in FIG. 3, the mask 22 according to this embodiment is configured not only to form a low beam light distribution pattern PL having a first cut line CL1 by cutting off a portion of the emitted light by the LED 14 but also to form a high beam light distribution pattern PH having a second cutting line CL2 by cutting a portion of the light emitted by the LED 16. In addition, as shown in Figure 3 the PL crossover light distribution pattern and the high beam light distribution pattern PH partially overlap, and this limits the formation of an unlit area between the two light distribution patterns. The second cutting line CL2 is formed at the lower end of the high beam light distribution pattern PH and this prevents lighting a near area in front of the vehicle more than necessary, making it possible to suppress the decrease in visibility. The effects of operation resulting from the shifting of the front edge 22a of the mask 22 relative to the rear focus F will then be described in detail. Figures 4 (a) to 4 (h) each illustrate the relationship between the position of the front end of the mask relative to the rear focus F of the projection lens and the light distribution patterns formed. Figures 4 (a), 4 (c), 4 (e) and 4 (g) show the enlarged light distribution patterns formed in a central area R including the point of intersection between a line HH and a line VV shown in Figure 3.
    [0007] As shown in FIG. 4 (b), the entire central area R is illuminated in the case where the mask 22 is not present. In a light distribution pattern PL1, a central area R2 including the line HH is light and areas R1, R3, which are above and below the central area R2 become darker than the area R2 ( refer to Figure 4 (a)). In a real pattern of light distribution, an area near the H-H line becomes brighter and the brightness gradually decreases as the area extends upward or downward away from the H-H line. However, in this embodiment, the central zone R is divided into zones R1, R2 and R3, as a convenience to describe the operation of the mask 22. Then, as shown in FIG. 4 (d), in the case where the position of the front edge 22a of the mask 22 substantially coincides with that of the rear focus F, although almost all of the lower half of the central zone R is illuminated, since the mask 22 has a certain thickness, a cutting line CL3 to the upper end of a low beam light distribution pattern PL2 is formed slightly lower than the line HH. In the low beam light distribution pattern PL2, an area R2 which lies below the line HH becomes bright and an area R3 which lies below the area R2 becomes darker than the area R2 (see in Figure 4 (c)). For this reason, the cutting line CL3 becomes relatively clear. In the case where the mask 22 is arranged as shown in Figure 4 (d), when a high beam light distribution pattern PH2 having a cutting line CL4 at its lower end is formed in addition to the distribution pattern In the low beam light PL2, there may be a case where an unlit area R 'is produced near the line HH. Then, as shown in Fig. 4 (f), in the case where the front edge 22a of the mask 22 is positioned further back than the back focus F (as shown in Fig. 1), not only the light passing in front of the rear focus F of the projection lens 12 but also the partial light that passes between the rear focus F and the front edge 22a contribute to the formation of light distribution patterns. For this reason, in a dipped beam light distribution pattern PL3, with respect to the dipped beam light distribution pattern PL2 shown in Fig. 4 (c) the cut line CL5 moves upwards. Similarly, in a high beam light distribution pattern PH3, with respect to the high beam light distribution pattern PH2 shown in Fig. 4 (c), the cut line CL6 moves downward ( refer to Figure 4 (e)). This allows the two light distribution patterns to overlap partially (with reference to an area R "), which prevents the production of the unlit area R 'shown in Fig. 4 (c) in a guaranteed manner. the cut line CL5 at the upper end of the dipped beam light distribution pattern PL3 is remote from the center (line HH) and accordingly, the cut line CL5 becomes darker than the cut line CL3 which is shown disposed near the center of the central zone R in Fig. 4 (c), furthermore, in the case where the lamp is inclined downwards so that the cutting line CL5 approaches the center (line HH), it is feared that the near front area in front of the vehicle becomes too bright.To improve this point, as shown in Figure 4 (h), the front edge 22a of the mask 22 is then arranged further back and up than the rear focus. F of the projection lens 12.
    [0008] Most of the light emitted by the dipped beam light source which is used to form the upper half of the light distribution pattern is cut off by disposing the mask 22 in the manner described above and accordingly, in a In FIG. 4 (g), the cut-off line PL7 is lowered in the vicinity of the center (line HH) with respect to the dipped beam light distribution pattern PL3 shown in FIG. Figure 4 (e). In the crosslamp light distribution pattern PL4, similarly to the area R2 shown in Fig. 4 (a), an area near the line HH is bright and accordingly, the cut line is formed in this area, so that the cutting line can become sharp. On the other hand, by moving the mask 22 upwards, the amount of light of the light emitted by the high beam light source which passes between the front edge 22a and the rear focus F is increased and the cutting line CL8 of the high beam light distribution pattern PH4 is also decreased (refer to Figure 4 (g)). This makes it possible to position a brighter area of the high beam light distribution pattern PH4 between the line H-H and the cut line CL7 of the dipped beam light distribution pattern PL4. The vehicle lamp 10 according to this embodiment provides the following operating effects, in addition to those described above. As shown in Fig. 3, the mask 22 according to this embodiment is configured to cause the first cutting line CL1 and the second cutting line CL2 to form a horizontal cutting line from the center to the near areas. their left and right end parts. This makes it possible to obtain preferable light distribution patterns, for example for a motorcycle. In many cases, the motorcycle is inclined to tilt during its movement, and as a result, vertically offset light distribution patterns are not as necessary on the motorcycle as on a four-wheeled vehicle. For this reason, the light distribution patterns can be simplified and thus, the shape of the mask 22 can be simplified. As shown in FIG. 2, the mask 22 is arranged so that its front edge 22a is turned towards the focal curve of the projection lens 12 and is in a form in which the distance G2 between the front edge 22a and the curve The focal length FL in an outer zone far away from the optical axis Ax is greater than the distance G1 between the front edge 22a and the focal curve FL in an area near the optical axis Ax. This makes it possible to modify the shape of the cutting line of the light distribution pattern which is very far from the optical axis at these two end portions. Specifically, as shown in FIG. 3, the cutting lines CL1 'of the first cutting line CL1 of the dipped beam light distribution pattern PL at the two end portions can be made in such a way that project to parts above the HH line. This makes it possible to continue to illuminate the vicinity of the line HH even if the cutting line CL1 'at one of the end portions of the dipped beam light distribution pattern PL is lowered in a direction indicated by the arrow A by causing the left and right inclination of the body of a motorcycle on which the vehicle lamp 10 is mounted, so that it is difficult to reduce the visibility forward. The vehicle lamp 10 includes the first reflector 18 which is configured to reflect the light emitted by the LED 14 to the projection lens 12 while directing it to the optical axis Ax and the second reflector 20 which is provided on the opposite side at the side where is provided the first reflector 18 on either side of the optical axis Ax and which is configured to reflect the light emitted by the LED 16 towards the projection lens 12 while directing it towards the optical axis Ax . In addition, the mask 22 is configured not only to form the low beam light distribution pattern PL having the first cut line CL1 in the upper edge portion but also to form the high beam light distribution pattern. PH having the second cutting line CL2 in the lower edge portion. This makes it possible to individually form different cutting lines for the two light distribution patterns. In addition, the mask 22 is configured to allow areas of the low beam light distribution pattern PL and the high beam light distribution pattern PH to overlap partially.
    [0009] The brightness of the illuminated area overlapping with the low beam light distribution pattern PL and the high beam light distribution pattern PH can be improved by the mask 22 which is configured as described above. In addition, as shown in FIG. 1, the high beam light distribution pattern PH2 and the low beam light distribution pattern PL2 can be made by the single projector lamp unit and accordingly the All of the lamp for vehicle can be realized with a small size. (Second Embodiment) Fig. 5 is a vertical sectional view of a vehicle lamp 30 according to a second embodiment, showing a brief configuration thereof. The vehicle lamp 30 is a vehicle headlamp in which light distribution patterns can be switched between a low beam light distribution pattern and a high beam light distribution pattern and an overhead light lamp can be formed when the low beam light distribution pattern or the high beam light distribution pattern is formed. Air panel fire means a light distribution pattern intended mainly to illuminate the overhead panels and emitting a weak light which spreads on the order of 4 degrees vertically and of the order of 20 degrees horizontally. The vehicle lamp 30 comprises a projection lens 32 which is arranged on an optical axis Ax which extends in the longitudinal direction of the vehicle, LEDs (light-emitting diodes) 34, 36, which respectively constitute a first light source and a light source. 10 second light source, which are arranged towards the rear of the projection lens 32, a first reflector 38 configured to reflect forwards the light emitted upwards by the LED 34 which is arranged further back than the focus rearward F of the projection lens 32 while directing it towards the optical axis Ax, a second reflector 40 configured to reflect forward the light emitted downwards by the LED 36 which is arranged further back than the focus rear view F of the projection lens 32 while directing it towards the optical axis Ax and a mask 42 which is arranged so that the leading edge 42a is positioned in an area between the lens of Projection 32 and LEDs 34, 36. Projection lens 32 and LEDs 34, 36 have almost the same configurations as those of the first embodiment. When mounted on a substrate, the LEDs 32 are respectively attached to the top and bottom surfaces of a base portion 44. The base portion 44 is doubled as a heat sink and a mounting portion. 44a of the LED 34 and a mounting portion 44b of the LED 36 are provided separated from each other from the point of view of heat dissipation. In addition, the mounting portion 44b of the LED 36 which is a light source for a high beam light distribution pattern is disposed further back than the mounting portion 44a. In this way, the mounting portions of the two light sources are spaced apart from each other so as to allow effective heat dissipation and this arrangement also contributes to decreasing the size of the base portion 44. The LED 34 emits light which is directed towards the rear focal spot F 35 of the projection lens 32, and the LED 36 emits light which is directed towards a second focus F2 'of the second reflector 40 which is located above the rear focus F of the projection lens 32. The LED 34 is illuminated not only to form a dipped beam light distribution pattern (PL) as the first light distribution pattern and aerial panel (OHS) but also to form a high beam light distribution pattern (PH) as a second light distribution pattern. On the other hand, the LED 36 is illuminated to form the high beam light distribution pattern (PH). The first reflector 38 has a reflective surface 38a which is substantially ellipsoidly formed around the optical axis Ax as a central axis and a reflective surface 38b which is formed further back than the reflecting surface 38a towards the central axis. front end of the first reflector 38 and which constitutes one of the dual reflective surfaces for forming the overhead panel light. Reflective surface 38a has a vertical section which is formed substantially by an ellipse. The LED 34 is disposed near the first focus F1 of an ellipse which is formed by the vertical section of the reflecting surface 38a including the optical axis Ax. This allows the reflective surface 38a to reflect forward light from the LED 34 while directing it towards the optical axis Ax. When this occurs, light is converged substantially to the second focus F2 of the ellipse in the vertical section including the optical axis Ax. In this embodiment, the second focus F2 substantially coincides with the focus F of the projection lens 32. The reflecting surface 38b is configured to reflect to the second reflector 40 a portion of the light emitted by the LED 34. The second reflector 40 has a reflecting surface 40a which is substantially ellipsoidly formed around optical axis Ax as a central axis and a reflecting surface 40b which is formed further forward than reflecting surface 40a towards the front end of second reflector 40 and which constitutes the other surface of the dual reflective surfaces to form the air panel fire. The reflecting surface 40a has a vertical section which is formed substantially by an ellipse including the optical axis Ax. The LED 36 is disposed near the first focus F1 'of an ellipse which is formed by the vertical section of the reflecting surface 40a including the optical axis Ax. This allows the reflecting surface 40a to reflect forward light from the LED 36 while directing it to the optical axis Ax. When this occurs, light is converged substantially to the second focus F2 'of the ellipse in the vertical section including the optical axis Ax. The second reflector 40 is arranged so that the second focus F2 'is positioned above the rear focus F of the projection lens 32. The major axis of the second reflector 40 having the ellipsoidal surface is inclined with respect to the optical axis Ax. The reflecting surface 40b is configured to reflect the light emitted by the LED 34 and reflected back to the projection lens 32 by the reflecting surface 38b. The mask 42 which forms the cutting lines is a light cutting element which partially cuts the light emitted by the LED 34 and then reflected on the reflecting surface 38a of the first reflector 38. The mask 42 is arranged so that its front edge 42a is positioned further back (to the right in Fig. 5) and upward than the back focus F. This produces a defined space between the leading edge 42a of the mask 42 and a focal lens curve which is formed by continuously connecting the focal points F of the projection lens 32. For this reason, in the vehicle lamp 30, not only the light which passes in front of the rear focus F of the projection lens 32 but also the light which passes behind the rear focus F of the projection lens 32, i.e. the light passing between the front edge 42a and the rear focus F contribute to the formation of the dipped beam light distribution pattern and the tif of high beam light distribution. Accordingly, in a manner similar to that shown in FIG. 3, the vehicle lamp 30 according to this embodiment is also configured not only to form a PL dipped beam light distribution pattern having a first cutting line. CL1 by cutting a portion of the light emitted by the LED 34 but also to form a high beam light distribution pattern PH having a second cutting line CL2 by cutting a portion of the light emitted by the LED 36. In the vehicle lamp 30, similarly to that shown in FIG. 3, the low beam light distribution pattern PL and the high beam light distribution pattern PH partially overlap and accordingly the production of an unlit area is limited between the two light distribution patterns. In addition, in the vehicle lamp 30, the front edge 42a of the mask 42 is disposed further back and up than the rear focus F of the projection lens 32. This limits the interference of light from the surface reflective 40a to the second focus F2 'with the mask 42 even if the second reflector 40 is arranged so that the second focus F2' of the second reflector 40 is more upward than the back focus F. The positioning of the second focus F2 the second reflector 40 so as to be more upward than the back focus F can move the position of the high beam light distribution pattern PH having a greater light intensity, more downward than the line HH. As described with reference to FIGS. 4 (g) and 4 (h), the cutting line of the dipped beam light distribution pattern can become clear. In the vehicle lamp 30, the second reflector 40 which contributes to the formation of the high beam light distribution pattern is further back than the first reflector 38 which contributes to the formation of the light distribution pattern of the lights. crossing. In this way, in the case where the distance between the first focus F1 'of the second reflector having the ellipsoidal surface and its second focus F2' located near the back focus F becomes long, the ellipse itself which is defined by the two foci becomes large, which increases the reflective surface 40a of the second reflector 40 relative to cases where the distance is short. This allows most of the light emitted by the LED 36 to be reflected, and as a result, the largest light intensity of the high beam light distribution pattern can be increased. In the vehicle lamp 30, in the case where a reflective element (corresponding to the reflecting surface 40b) which is configured to reflect again the reflected light for an overhead panel light which is reflected on the reflecting surface 38b of the first reflector 38 is provided at the front edge 42a of the mask 42, this reflective element interferes with a portion of the light reflected on the reflecting surface 40a of the second reflector 40 to form the high beam light distribution pattern, so that can not form a desired high beam light distribution pattern. However, in the vehicle lamp 30 according to this embodiment, the reflective surface 40b configured to reflect again the reflected light which is reflected on the reflective surface 38b of the first reflector to form the air panel light is provided at the front end portion of the second reflector 40 and accordingly, the interference problem described above never occurs. (Third Embodiment) Fig. 6 is a vertical sectional view of a vehicle lamp 50 according to a third embodiment, showing a brief configuration thereof. Fig. 7 is a resultant light ray diagram in the state where the vehicle lamp 50 forms a low beam light distribution pattern (PL) and an overhead light lamp (OHS). Fig. 8 is a resultant light ray diagram in the state where the vehicle lamp 50 forms a high beam light distribution pattern (PH) and an overhead lamp light (OHS). Similar to the vehicle lamp 30 of the second embodiment, the vehicle lamp 50 is a vehicle lamp in which light distribution patterns can be switched between a dipped beam light distribution pattern and a pattern. A headlamp light distribution pattern and an overhead light may be formed when the low beam light distribution pattern or the high beam light distribution pattern is formed. In the following description, analogous reference numbers will be assigned to configurations and operating effects similar to those of the vehicle lamp 30 of the second embodiment and their similar descriptions will be omitted as necessary.
    [0010] The vehicle lamp 50 comprises a projection lens 32 which is arranged on an optical axis Ax which extends in the longitudinal direction of the vehicle, LEDs (light-emitting diodes) 52, 54 which respectively constitute a first a light source and a second light source, which are arranged towards the rear of the projection lens 32, a first reflector 56 configured to reflect the light emitted upwards by the LED 52 which is arranged further back than the rear focus F of the projection lens 32 forwards while directing it towards the optical axis Ax, a second reflector 58 configured to reflect the light emitted downwards by the LED 54 which is arranged further back than the focus rear view F of the projection lens 32 towards the axial axis Ax and a mask 60 which is arranged so that a leading edge 60a is positioned in an area between the Projection wafer 32 and LEDs 52, 54. LEDs 52, 54 have almost the same configurations as those of the first embodiment and the second embodiment. When mounted on a substrate, the LEDs 52, 54 are respectively attached to the upper surface and the lower surface of a base portion 62. The base portion 62 is doubled as a heat sink, and a The mounting portion 62a of the LED 52 and a mounting portion 62b of the LED 54 are disposed separate from each other from the point of view of heat dissipation. The LED 52 emits light which is directed towards the rear focus F of the projection lens 32 and the LED 54 emits light which is directed towards a second focus F2 'of the second reflector 58 which is above the focus The LED 52 is illuminated not only to form a dipped beam light distribution pattern (PL) as a first light distribution pattern and an overhead light (OHS) light. (Referring to Fig. 7) but also to form a high beam light distribution pattern (PH) as the second light distribution pattern. On the other hand, the LED 54 is illuminated to form the high beam light distribution pattern (PH) (refer to Figure 8). When this happens, the overhead light (OHS) is also formed. The first reflector 56 has a reflecting surface 56a which is formed by a free curved surface which is based on a substantially ellipsoidal shape formed around the optical axis Ax as a central axis and a reflective surface. 56b which is formed further forward than the reflective surface 56a towards the front end of the first reflector 56 and which constitutes one of the dual reflective surfaces for forming the overhead panel light. A rear portion 56a1 of the reflecting surface 56a is shaped to reflect the light emitted by the LED 52 to a downstream portion in front of the lamp. A front portion 56a2 of the reflective surface 56a continues toward the rear portion 56a1 and is shaped to extend progressively as it extends forwardly of the lamp. The LED 52 is disposed near the first focus F1 (see FIG. 6) of an ellipse which is formed by a vertical section, including the optical axis Ax of the rear portion 56a1 of the reflecting surface 56a. By being arranged in this manner, when forming a dipped beam light distribution pattern shown in FIG. 7, the rear portion 56a1 of the reflecting surface 56a reflects light from the LED 52 to the first of all by directing it towards the Ax optical axis. When this occurs, light is converged substantially to the second focus F2 (refer to Figure 6) of the ellipse in the vertical section including the optical axis Ax. In this embodiment, this second focus F2 substantially coincides with the back focus F (refer to FIG. 6) of the projection lens 32. The light reflected at the front portion 56a2 of the reflective surface 56a strikes the neighborhood from the center of the incident surface 32a of the projection lens 32 as nearly parallel light. The reflective surface 56b is configured to reflect to the second reflector 58 a portion of the light emitted by the LED 52. The second reflector 58 has reflective surfaces 58a, 58c which are formed substantially ellipsoid about the optical axis Ax as a central axis and a reflective surface 58b which is formed further forward than the reflective surface 58a towards the front end of the second reflector 58 and which constitutes the other of the dual reflective surfaces to form the overhead panel light. The sectional shape of the reflecting surface 58a including the optical axis Ax is substantially formed by an ellipse. The LED 54 is disposed near the first focus F1 '(refer to Figure 6) of the ellipse which is formed by the vertical section of the reflecting surface 58a including the optical axis Ax. This allows the reflective surface 58a to reflect forward light from the LED 54 while directing it to the optical axis Ax. When this occurs, the light is converged substantially to the second focus F2 '(refer to Figure 6) of the ellipse in the vertical section including the optical axis Ax. The second reflector 58 is arranged so that the second focus F2 'is above the rear focus F of the projection lens 32 (refer to FIG. 6), the major axis of the second reflector 58 having the ellipsoidal surface is inclined with respect to the optical axis Ax. The reflective surface 58b is configured to reflect the light emitted by the LED 52 and then reflected on the reflecting surface 56b to the projection lens 32. Similarly, the reflecting surface 58c is configured to reflect the light emitted by the LED 54 toward the Projection lens 32. The reflected light, reflected on the reflecting surface 58b, is used as light to form the overhead panel light. In this way, in the second reflector 58, the reflective surface 58a which reflects the light from the LED 54 to contribute to the formation of the high beam light distribution pattern PH and the reflective surface 58b which reflects the light again. emitted by the LED 52, then reflected on the first reflector 56 to contribute to the formation of the overhead panel light, are integrally formed with each other.
    [0011] The mask 60 which forms the cutting lines is a light cutting element which cuts off part of the light emitted by the LED 52 and then reflected on the reflecting surface 56a of the first reflector 56. The mask 60 is arranged so that the edge before 60a is further back (to the right in Figure 6) and upward than the rear focus F. For this reason, the vehicle lamp 50 provides the same operating effects as those provided by the lamps for vehicle according to the embodiments that have been described above. In the vehicle lamp 50 according to the third embodiment, the mounting portion 62a of the base portion 62 on which the LED 52 which mainly forms the dipped beam light distribution pattern is almost parallel to the optical axis. of the projection lens 32. This allows the lights constituting the low beam light distribution pattern PL to pass through the projection lens 32 near its center, as shown in FIG. 7, and accordingly, with respect to When the lights pass through the projection lens 32 at its circumferential zone (for example, the dipped beam light distribution pattern PL of FIG. 5), the color separation is reduced, so that it is possible to limit the blueing of the cut line formed. The angle formed by the mounting portion 62b on which the LED 54 and the mounting portion 62a are mounted is in the range of 15 to 16 degrees. The mask 60 of the vehicle lamp 50 has an inclined portion 60b which is formed by tilting its rear end downwardly. This makes it possible to increase the resistance of the mask 60. Moreover, this makes it possible to avoid the reflection of the light reflected on the reflecting surface 58a of the second reflector 58, on the lower surface 60c of the mask 60, otherwise the reflected light becomes unwanted light. In addition, the mask 60 is further lowered at the rear end (inclined portion 60b) than at the front edge 60a, so that even if the light emitted by the LED 52, then reflected on the first reflector 56 is reflected on the upper surface 60d of the mask 60, it can be arranged that the reflected light does not strike the projection lens 32. In this way, the light reflected again by the mask 60 is prevented from striking the projection lens 32, so that the generation of a boundary between the light and dark areas in a light distribution pattern can be limited, thereby improving the visibility of the driver of the illuminated area in front of the vehicle. Mask 60 may include an inclined portion 60e that is formed by tilting the rear end upwardly. When this occurs, the light which is reflected at the rear portion 56a1 of the first reflector 56 to strike the upper surface 60d of the mask 60 at an angle close to the horizontal can be cut off, so that it can be prevented. light which is reflected again on the upper surface 60d of the mask 60 to strike the projection lens 32.
    [0012] From the point of view of the embodiment of the vehicle lamp in which the two light distribution patterns partially overlap, there is no problem in the case where the light reflected back on the lower surface 60c or the upper surface 60d of the mask 60 can hit the projection lens 32, to improve the brightness. Thus, although the invention has been described with reference to the embodiments, the invention is not limited by the embodiments and thus, appropriate combinations or replacements of the configurations of the embodiments are also included in the invention. invention. In addition, those skilled in the art can modify the combinations of configurations or the order of the processes as necessary in the embodiments or make various design changes to the embodiments based on their common knowledge. Embodiments to which these modifications are made are also included within the scope of the invention.
    权利要求:
    Claims (6)
    [0001]
    REVENDICATIONS1. A vehicle lamp (10; 30; 50) comprising: a projection lens (12; 32) which is disposed on an optical axis (Ax) extending in the longitudinal direction of the vehicle; a first light source (14; 34; 52) which emits light which is directed to the rear focus (F) of the projection lens (12; 32); a second light source (16; 36; 54) which emits light which is directed towards the rear focus (F) of the projection lens (12; 32); and a mask (22; 42; 60) which can not only form a first light distribution pattern having a first cutting line by cutting off a portion of the light emitted by the first light source (14; 34; 52) but also by a second light distribution pattern having a second cutting line by cutting off a portion of the light emitted by the second light source (16; 36; 54), wherein the mask (22; 42; 60) is disposed so that its front end portion (22a; 42a; 60a) is positioned further back than the back focus (F).
    [0002]
    The vehicle lamp (10; 30; 50) according to claim 1, wherein the mask (22; 42; 60) is configured so that the first cutting line 25 and the second cutting line constitute a horizontal cutting line. from the center to areas near their left and right ends.
    [0003]
    The vehicle lamp (10; 30; 50) according to claim 1 or 2, wherein the mask (22; 42; 60) is disposed so that its front end portion (22a; 42a; 60a) is facing the focal curve of the projection lens (12; 32), and wherein the mask (22; 42; 60) is shaped to a shape in which the distance between the front end portion (22a; 42a; 60a; and the focal length in an area far away from the optical axis (Ax) is greater than the distance between the leading end portion (22a; 42a; 60a) and the focal length in an area lying near the optical axis.
    [0004]
    The vehicle lamp (10; 30; 50) according to any one of claims 1 to 3, further comprising a first reflector (18; 38; 56) configured to reflect light emitted from the first light source (14; 34; 52) to the projection lens (12; 32) while directing it towards the optical axis (Ax); and a second reflector (20; 40; 58) which is disposed on the side opposite the side where the first reflector (18; 38; 56) is provided on either side of the optical axis (Ax) and which is configured for reflecting the light emitted by the second light source (16; 36; 54) towards the projection lens (12; 32) while directing it towards the optical axis (Ax), wherein the mask (22; 42; 60) is configured not only to form a dipped beam light distribution pattern (PL) having a first score line in an upper edge portion but also to form a high beam light distribution pattern (PH). having a second cutting line in a lower edge portion.
    [0005]
    The vehicle lamp (10; 30; 50) according to any one of claims 1 to 4, wherein the mask (22; 42; 60) is configured to allow zones of the first light distribution pattern and the second light distribution pattern to overlap partially.
    [0006]
    The vehicle lamp (10; 30; 50) according to any one of claims 1 to 5, wherein the mask (22; 42; 60) is disposed so that the front end portion (22a; 42a; 60a) is positioned more upward than the back focus (F).
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    同族专利:
    公开号 | 公开日
    US9631786B2|2017-04-25|
    FR3017188B1|2019-04-05|
    CN104819422A|2015-08-05|
    KR101817830B1|2018-01-11|
    DE102015202019A1|2015-08-06|
    KR20150092716A|2015-08-13|
    JP2015149158A|2015-08-20|
    US20150219301A1|2015-08-06|
    JP6246007B2|2017-12-13|
    CN104819422B|2018-06-29|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    JP4044024B2|2003-09-29|2008-02-06|株式会社小糸製作所|Vehicle headlamp|
    DE102006041942A1|2006-09-07|2008-03-27|Hella Kgaa Hueck & Co.|Projection headlight for vehicle, has reflector devices extending in area between extension level of respective light source device and optical axis of lens, where light source devices are attached to respective reflector devices|
    JP2008123753A|2006-11-09|2008-05-29|Koito Mfg Co Ltd|Lamp unit for vehicle|
    JP5264448B2|2008-12-02|2013-08-14|株式会社小糸製作所|Projection type vehicle lamp|
    JP5133861B2|2008-12-09|2013-01-30|株式会社小糸製作所|Lighting fixtures for vehicles|
    JP5592183B2|2010-07-16|2014-09-17|株式会社小糸製作所|Vehicle lighting|
    JP5985246B2|2012-05-16|2016-09-06|株式会社小糸製作所|Vehicle headlamp|WO2016021698A1|2014-08-07|2016-02-11|株式会社小糸製作所|Lamp for vehicles|
    CN105135318A|2015-09-06|2015-12-09|束旭初|Light source structure of automotive LED headlamp|
    JP6647551B2|2015-10-14|2020-02-14|Smc株式会社|Fluid pressure device and manufacturing method thereof|
    CN106641944A|2015-10-30|2017-05-10|法雷奥照明湖北技术中心有限公司|Lighting device for motor vehicle and motor vehicle|
    CN105240775A|2015-11-25|2016-01-13|海盐丽光电子科技有限公司|LED automobile lens adopting light supplementing structure|
    CN105546449A|2016-01-15|2016-05-04|深圳市寰宇锦鸿科技发展有限公司|Car lamp structure|
    FR3048485B1|2016-03-02|2019-04-05|Valeo Vision|IMPROVED LENS FOR LIGHTING DEVICE OF MOTOR VEHICLE|
    JP6709655B2|2016-03-25|2020-06-17|株式会社小糸製作所|Vehicle lamp and vehicle equipped with the vehicle lamp|
    CN109416162B|2016-06-29|2021-06-04|株式会社小糸制作所|Vehicle lamp|
    KR101975459B1|2016-10-25|2019-05-08|에스엘 주식회사|Lamp for vehicle|
    TWI624621B|2017-02-08|2018-05-21|誠益光電科技股份有限公司|Headlight device|
    CN108692270B|2017-02-20|2020-05-12|诚益光电科技股份有限公司|Vehicle lamp device|
    FR3065088A1|2017-04-11|2018-10-12|Valeo Vision|OPTICAL ASSEMBLY COMPRISING REFLECTORS WITH DISCONTINUITIES|
    JP6840606B2|2017-04-14|2021-03-10|スタンレー電気株式会社|Lens body and vehicle lighting equipment|
    KR20190012436A|2017-07-27|2019-02-11|에스엘 주식회사|Lamp for vehicle|
    JPWO2019069682A1|2017-10-06|2020-10-22|株式会社小糸製作所|Vehicle headlights|
    JP2019083120A|2017-10-30|2019-05-30|市光工業株式会社|Vehicular lighting fixture|
    JP6968686B2|2017-12-22|2021-11-17|スタンレー電気株式会社|Vehicle lighting|
    FR3077367B1|2018-01-31|2021-04-16|Valeo Vision|DUAL-FUNCTION LIGHT MODULE WITH COMMON ILLUMINATED SURFACE|
    KR101975702B1|2018-03-16|2019-05-07|한국광기술원|LED headlamp for the motorcycle|
    EP3805634A4|2018-06-01|2022-01-26|Ichikoh Industries Ltd|Vehicular lamp|
    US10655807B2|2018-08-29|2020-05-19|Valeo North America, Inc.|Method and apparatus for vehicle lighting|
    CN109058915B|2018-10-18|2021-06-01|常熟理工学院|LED light source high beam and low beam integrated car lamp module|
    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 |
    2018-05-25| PLSC| Publication of the preliminary search report|Effective date: 20180525 |
    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
    JP2014020573A|JP6246007B2|2014-02-05|2014-02-05|Vehicle lighting|
    JP2014020573|2014-02-05|
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