专利摘要:
A vehicle lamp has an element installation part (120) including a mounting face (122), a light emitting element (140) which is mounted on the mounting face and which has a transmitting face of a rectangular shaped light (142) extending parallel to the mounting face, and a reflector (160) configured to reflect light from the light emitting element. The mounting face is inclined so that each end (122L, 122R) of the mounting face in the left-right direction of the lamp is in a different height position. The light emitting element is mounted on the mounting face so that with respect to a reference position (240) where two sides (242a, 242b) of the light emitting face (242) are parallel to the front axis the back of the lamp and the other two sides (242b, 242d) of the light emitting face (142) are perpendicular to the front-rear axis of the lamp, the light-emitting face (142) is positioned in a position rotated around a reference axis (N) which is orthogonal to the light-emitting face when the light emitting face is in the reference position.
公开号:FR3017925A1
申请号:FR1551591
申请日:2015-02-25
公开日:2015-08-28
发明作者:Tatsuma Kitazawa
申请人:Koito Manufacturing Co Ltd;
IPC主号:
专利说明:

[0001] BACKGROUND OF THE INVENTION FIELD OF THE INVENTION The present invention relates to a vehicle lamp. The present invention particularly relates to a vehicle lamp used in a vehicle such as an automobile. PRIOR ART Vehicle lamps are known including a light source installation part with a light source mounting face, a light emitting element serving as a light source, and a reflector which reflects in front of the lamp the light emitted by the light emitting element (see, for example, JP-A-2011-82117) Vehicle lamps such as those described above are generally designed so that the mounting face of the source of light is horizontal. However, one can conceive of cases in which it becomes necessary to tilt the mounting face due to the shape of the vehicle on which the vehicle lamp is installed. Extensive studies by the inventor have shown that the inclination of the mounting face can lead to a decrease in the accuracy of the formation of a light distribution pattern.
[0002] SUMMARY Embodiments of the invention provide a vehicle lamp capable of suppressing the decrease in the accuracy of the formation of the light distribution pattern due to the inclination of the mounting face of the light emitting element in a state where the vehicle lamp is attached to a vehicle. A vehicle lamp according to an exemplary embodiment of the invention comprises: an element installation part including a mounting face of a light emitting element; At least one light emitting element which is mounted on the mounting face and which has a rectangular light emitting face extending parallel to the mounting face; and a reflector configured to reflect the light of the light emitting element, wherein the mounting face is inclined so that each end of the mounting face in the left-right direction of the lamp is in a position of different height, and the light emitting element is mounted on the mounting face 10 so that with respect to a reference position where two sides of the light emitting face are parallel to the front-rear axis of the lamp and the other two sides of the light-emitting face are perpendicular to the front-rear axis of the lamp, the light emitting face is positioned in a position rotated about a reference axis which is orthogonal to the light emitting face when the light emitting element is in the reference position. According to this aspect, it is possible to eliminate the decrease in the precision of formation of the light distribution pattern due to the inclination of the mounting face of the light emitting element. The reflector may reflect the light of the light emitting element so that one side of the light emitting face forms at least a portion of a cutting line of a light distribution pattern. In addition, the vehicle lamp may also include a plurality of light emitting elements, wherein the reflector 25 may reflect the light of the plurality of light emitting elements so that one side of the respective light emitting faces of the plurality light emitting elements is aligned to form the cutting line. As a result, the cutting line of the light distribution pattern can be formed with great precision. A vehicle lamp according to an exemplary embodiment of the invention comprises: an element installation part including a mounting face of a light emitting element; at least one light-emitting element which is mounted on the mounting face and which has a rectangular-shaped light emitting face extending parallel to the mounting face; and a reflector configured to reflect light from the light emitting element; 5 in which the mounting face is inclined so that each end of the mounting face in the left-right direction of the lamp is in a different height position, and the light-emitting element is mounted on the face of the lamp. 10 so that, with respect to a reference position which is a position occupied by the light emitting element when the light emitting element is oriented as determined according to the shape of a light distribution pattern intended for be formed when the mounting face is in a horizontal state, and the mounting face is then inclined so that each end of the mounting face in the left-right direction of the lamp is in the different height position while by maintaining the orientation of the light emitting element, the light-emitting face is positioned in a position rotated about an axis reference which is orthogonal to the light emitting face when the light emitting element is in the reference position. According to this aspect, it is possible to eliminate the decrease in the accuracy of the formation of the light distribution pattern due to the inclination of the mounting face of the light emitting element. According to exemplary embodiments of the invention, it is possible to eliminate the decrease in the accuracy of the formation of the light distribution pattern due to the inclination of the mounting face of a light emitting element in a state where the vehicle lamp is attached to the vehicle. 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 front view showing a schematic configuration of a vehicle lamp according to one embodiment. Figure 2 is a plan view schematically showing the structure of a reflector. Fig. 3 is a plan view schematically showing the structure of an element installation part. Fig. 4 is an enlarged view of a light emitting element mounted on an element installation part. Fig. 5A is a view showing a portion of a light distribution pattern formed by the vehicle lamp of the present embodiment. Fig. 5B is a view showing light patterns projecting forward from the vehicle lamp of the present embodiment. Fig. 5C is a view showing the overall light distribution pattern formed by the vehicle lamp according to the present embodiment. Fig. 6A is a view showing a portion of a light distribution pattern formed by the vehicle lamp of Comparative Example 20. Fig. 6B is a view showing light patterns projecting forward from the vehicle lamp of the comparative example. Fig. 7A is a view showing another light distribution pattern formed by the vehicle lamp of the comparative example. Fig. 7B is a view showing another light distribution pattern formed by the vehicle lamp of the present embodiment. DETAILED DESCRIPTION Explanations follow regarding a preferred embodiment of the invention, with reference to the drawings. Identical or equivalent configuration elements and methods have the same reference numbers on each of the drawings, and the repetition of their explanation is omitted where appropriate. Embodiments 301 are examples and do not constitute limitations of the invention and all features and combinations thereof in the embodiments are not necessarily essential to the invention. Fig. 1 is a front view showing a schematic configuration of a vehicle lamp according to one embodiment. Figure 2 is a plan view schematically showing the structure of a reflector. Fig. 3 is a plan view schematically showing the structure of an element installation part. Figure 3 is a plan view of the element installation part viewed from a mounting face. In Figure 1 to Figure 3, "FRONT", "REAR", "LEFT" and "RIGHT" indicate the front, rear, left and right of a vehicle lamp. for vehicle 1 of the embodiment is a vehicle headlight device including a pair of headlight units disposed to the left and right in front of a vehicle. The units of the pair of beacon units both have substantially the same configuration, apart from the fact that they are symmetrical left and right structures to each other and thus, Figure 1 illustrates the structure of the right side headlight unit. The vehicle lamp 1 comprises four lamp units 100. The lamp units 100 are housed in a lamp chamber configured from a lamp body (not shown) with a lamp body (FIG. opening front side of the vehicle, and a transparent cover (not shown) fixed to cover the opening of the lamp body. The four lamp units 100 are arranged in a row in the left-right direction of the lamp and adjacent units are coupled together to form an integrated structure. The lamp unit 100 positioned to the right (outside of the vehicle) functions as a fog lamp. The lamp unit 100 positioned more to the left 30 (inside the vehicle) functions as a turning light. The two lamp units 100 between them function as fog lamps and cornering lights. Note that the number, location and operation of lamp units 100 are not particularly limited. The lamp units 100 are provided with support member coupling portions 2. Support members (not shown) projecting from the lamp body are coupled to the support member coupling tab 2. The lamp unit 100 is fixed in this way to the lamp body. Each of the lamp units 100 is a so-called parabolic lamp unit and comprises an element installation part 120, a light emitting element 140 and a reflector 160. The element installation panels 120 are substantially flat shaped members which support the light emitting elements 140. As described above, in the vehicle lamp 1 of the embodiment, the four lamp units 100 have a structure mutually coupled together. The element installation parts 120 of each of the lamp units 100 are thus coupled together so that the element installation parts 120 form a single plate-shaped base. The element installation parts 120 comprise a mounting face 122 on which the light emitting elements 140 are mounted. The element installation parts 120 are arranged so that the mounting face 122 is turned substantially towards The mounting face 122 is inclined so that each end in the left-right direction of the lamp is in a different height position. In other words, with respect to a horizontal plane, the mounting face 122 is inclined about an axis which is parallel to the front-rear axis of the lamp and passes through the mounting face 122. The line dashes in Figure 1 indicates a horizontal line. In the present embodiment, the left end 122L of the mounting face 122 is positioned lower than the right end 122R in the up-down direction of the lamp. A wiring pattern (not shown) electrically connected to the light emitting elements 140 is formed on the mounting face 122. The light emitting elements 140 are, for example, configured by semiconductor light emitting devices such as LEDs. Each of the light emitting elements 140 has a rectangular light emitting face 142. The light emitting elements 140 may have a structure combining a semiconductor light emitting device and a phosphor which converts the wavelength of the light from the device 301 7 9 2 5 7 semiconductor light emitter. The light emitting elements 140 are mounted on the mounting face 122 so that their light emitting faces 142 are turned substantially downward in the lamp. The light emitting faces 142 extend parallel to the mounting face 122 in the mounted state of the light emitting elements 140 on the mounting face 122. The reflectors 160 each have a reflecting face 162 which reflects forwardly. the light emanating from the light-emitting element 140 from the light emitting element 140. The reflectors 160 project towards the front of the lamp a light pattern Pa corresponding to the shape of the light-emitting face 142 of the light-emitting element 140, (see Figure 5B). Each reflecting face 162 has the basic shape of a paraboloid of revolution, the shape being partially modified to create a specific light distribution pattern. Specifically, the reflective face 162 is divided into a plurality of zones, a specific modification being applied to each zone. The positional relationships between the reflective faces 162 and the light emitting elements 140 are fixed so that the focal points of the reflecting faces 162 coincide with the light emitting elements 140. A detailed explanation follows regarding the orientation of the light emitting elements 140 on the mounting face 122. Figure 4 is an enlarged view of a light emitting element mounted on an element installation part. "FRONT", "REAR", "LEFT" and "RIGHT" in Fig. 4 correspond to the front, rear, left and right of the vehicle lamp 1. In Fig. 4, the position of reference 240 of the light emitting element 140 is represented by a dashed line. The reference position 240 is a position where two sides 242a, 242c, of a light emitting face 242 are parallel to the front-rear axis of the lamp and the other two sides 242b, 242d are perpendicular to the axis. front-back (that is, parallel to the left-right axis of the lamp). It should be noted that the front-rear axis of the lamp is an axis parallel to the front-rear axis of the vehicle in the state installed on the vehicle of the vehicle lamp 1. The left-right axis of the lamp is an axis parallel to the left-right axis of the vehicle in the state installed on the vehicle of the vehicle lamp 1. Alternatively, the reference position 240 may be the position occupied by the vehicle. light emitting element 140 when, from a state in which the mounting face 122 is parallel to the horizontal plane, the light emitting element 140 being in an orientation (position) determined according to the shape of the pattern of light distribution to be formed, the mounting face 122 is then inclined to vary the height positions of the respective ends 122L, 122R of the mounting face 122 (so that each of the ends 122L, 122R of the mounting face 122 is at a different height while maintaining the orientation of the light emitting element 140. Each light emitting element 140 is mounted on the mounting face 122, the light emitting face 142 being positioned in a position having been a rotation about a reference axis N with respect to the reference position 240. The reference axis N is orthogonal to the light emitting face 242 when the light emitting element 140 is in the reference position 240. In the present embodiment, the reference axis N is an axis passing through the center of the light-emitting face 142. The value of the rotation of the light-emitting element 140 is adjusted in such a way that 20 depending on the inclination of the mounting face 122 and the shape of the light distribution pattern to be formed. For example, the mounting face 122 is inclined 5 ° to the horizontal plane, and the value of the rotation of the light emitting element 140 may be 15 ° relative to the reference position 240. Explanations follow concerning the differences between the light distribution pattern formed by the vehicle lamp 1 provided with the configuration described above and a light distribution pattern formed by a vehicle lamp of a comparative example. In the vehicle lamp of the comparative example, the mounting face is inclined so that each end in the left-right direction of the lamp is at a different height and the light-emitting elements are in the position of the lamp. 240. FIG. 5A illustrates a portion of a light distribution pattern formed by the vehicle lamp of the present embodiment. Figure 5B illustrates light patterns projecting forward from the vehicle lamp of the present embodiment. Fig. 5C illustrates the overall light distribution pattern formed by the vehicle lamp of the present embodiment. Fig. 6A illustrates a portion of a light distribution pattern formed by the vehicle lamp of the comparative example. Figure 6B illustrates light patterns projecting forward from the vehicle lamp of the comparative example. Fig. 7A illustrates another light distribution pattern formed by the vehicle lamp of the comparative example. Fig. 7B illustrates another light distribution pattern formed by the vehicle lamp of the present embodiment. FIG. 5C, FIG. 7A and FIG. 7B show the light distribution patterns formed on a fictitious vertical screen disposed in a specific position in front of the lamp, for example at 25 m in front of the lamp. As shown in FIG. 5A to FIG. 5C, the reflectors 160 of the vehicle lamp 1 of the present embodiment reflect the light of the light emitting element 142 so that one side of the light emitting face (For example, the side 142c) forms at least a portion of a cutting line CL of the light distribution pattern P1. In the present embodiment, the vehicle lamp 1 comprises a plurality of light emitting elements 140 and the reflectors 160 reflect the light of the different light emitting elements 140 so that the sides of the respective light emitting faces 142 of the different emitting elements light 140 are aligned to form the cutting line CL. That is, the light patterns Pa corresponding to the light emitting faces 142 of the light emitting elements 140 are aligned in a row, one side of each of the light patterns Pa being contiguous with the other, forming thus the cutting line CL of the light distribution pattern P1. As illustrated in FIG. 6A and FIG. 6B, in the vehicle lamp of the comparative example, in which the mounting face is inclined with respect to the horizontal plane and the light emitting elements are in the reference position, the sides of the light patterns Pa projecting in front of the lamp are at a certain angle to the location where the cut line CL should be formed. Some of the light patterns Pa extend where the cut line CL should be formed due to the angle of the light pattern Pa. When a portion B extending beyond the cut line CL is present, a portion of a light region of the light distribution pattern P protrudes at the point where the cut line CL should be formed. In addition, because of the angle of the light patterns Pa, the distance between the adjacent light patterns Pa increases and comparatively large gaps A appear between the adjacent light patterns Pa. The presence of these gaps A results in parts where the light region of the light distribution pattern P does not reach the place where the cutting line CL should be formed. It is therefore difficult to form the light distribution pattern P1 with the desired cutting line CL.
[0003] However, as shown in FIG. 5A to FIG. 5C, in the vehicle lamp 1 of the present embodiment, the light emitting elements are in rotated positions around the vehicle. reference axis N relative to the reference position. The light patterns Pa can therefore be projected so that the sides of the light patterns Pa are parallel to the place where the cutting line CL should be formed. The appearance of spaces A and B parts that exceed the cutting line CL can be removed. The light distribution pattern P1 can therefore be provided with the desired CL cutting line.
[0004] As illustrated in FIG. 7A, in the vehicle lamp of the comparative example, when a light distribution pattern P2 is formed without the cutting line CL, the overall light distribution pattern P2 is deformed. diagonal. However, as illustrated in FIG. 7B, in the vehicle lamp 1 according to the present embodiment, the overall light distribution pattern P2 may be formed extending in the horizontal direction without deformation. Any feeling of discomfort felt by the driver can therefore be reduced, and it is also possible to eliminate the decrease in the visibility of the driver. The light distribution pattern P2 is for example a high beam light distribution pattern. As described above, in the vehicle lamp 1 of the present embodiment, the mounting face 122 of the light emitting element 140 is inclined so that the height positions of each end 122L, 122R in the left direction -Right lamp are different from each other. The light emitting elements 140 are disposed in rotated positions relative to the reference position 240, where both sides 242a, 242c of the light emitting face 242 are parallel to the front axis. rear of the lamp, and the other two sides 242b, 242d are perpendicular to the front-rear axis of the lamp. Alternatively, the light emitting elements 140 may be disposed in rotated positions relative to the reference positions 240 which are the positions occupied by the light emitting elements 140 when the light emitting elements 140 are oriented as determined according to the shape of the light distribution pattern, the mounting face 122 being in a horizontal state and the mounting face 122 is then inclined while maintaining the orientation of the light emitting elements 140. therefore, it is possible to suppress the decrease in the formation accuracy of the light distribution pattern due to the fact that the mounting face 122 is inclined in a state of the vehicle lamp attached to the vehicle. The reflector 160 reflects light from the light emitting element 140 so that the side of the light emitting face 142 forms at least a portion of the cutting line CL of the light distribution pattern P1. In addition, the reflectors 160 reflect the light so that the sides of the different light emitting faces 142 are aligned to form the cut line CL. The cutting line CL can therefore be formed with great precision, even when the mounting face 122 is inclined. The invention is not limited to the embodiment described above and the scope of the invention includes embodiments to which various modifications are applied, such as design modifications, which can be applied taking advantage of the expertise. of a man of the art. A new embodiment resulting from the combination of the above embodiment with the following modification presents the advantageous effects combined of both the embodiment and the modification. In the embodiment described above, all four light emitting elements 140 are arranged in positions that have been rotated relative to the reference portion 240. However, it does not exist. of particular limitation to this and the advantageous effect of suppressing the decrease in the precision of formation of the light distribution pattern caused by the inclination of the mounting face 122 may exist to the extent that at least one of the light emitting elements 140 is disposed in a rotated position.
权利要求:
Claims (4)
[0001]
REVENDICATIONS1. A vehicle lamp characterized in that it comprises: an element installation part (120) including a mounting face (122) of a light emitting element; at least one light emitting element (140) mounted on the mounting face and having a rectangular light emitting face (142) extending parallel to the mounting face (122); and a reflector (160) configured to reflect light from the light emitting element 10, wherein the mounting face (122) is inclined such that each end (122L, 122R) of the mounting face (122) in the left-right direction of the lamp is in a position of different height, and the light emitting element (140) is mounted on the mounting face (122) so that with respect to a reference position (240) ) where two sides (242a, 242c) of the light-emitting face (242) are parallel to the front-rear axis of the lamp and the other two sides (242b, 242d) of the light-emitting face (242) are perpendicular to the front-back axis of the lamp, the light-emitting face (142) is positioned in a position rotated about a reference axis (N) which is orthogonal to to the light emitting face (242) when the light emitting element uve in the reference position (240).
[0002]
The vehicle lamp according to claim 1, wherein the reflector (160) reflects light from the light emitting element (140) so that one side of the light emitting face (142) forms at least a portion a cutting line of a light distribution pattern.
[0003]
The vehicle lamp of claim 1 or 2, further comprising: a plurality of light emitting elements, wherein the reflector (160) reflects light from the plurality of light emitting elements so that one side of the faces respective light emitters of the plurality of light emitting elements are aligned to form the cutting line.
[0004]
A vehicle lamp characterized in that it comprises: an element installation part (120) including a mounting face (122) of a light emitting element; at least one light emitting element (140) which is mounted on the mounting face and which has a rectangularly shaped light emitting face (142) extending parallel to the mounting face (122); and a reflector (160) configured to reflect light from the light emitting element; wherein the mounting face (122) is inclined such that each end (122L, 122R) of the mounting face in the left-right direction of the lamp is in a position of different height, and the transmitting element of light (140) is mounted on the mounting face (122) so that, with respect to a reference position (240) which is a position occupied by the light emitting element when the light emitting element is oriented as determined according to the shape of a light distribution pattern to be formed when the mounting face (122) is in a horizontal state, and the mounting face (122) is then inclined so that each end (122L, 122R) of the mounting face in the left-right direction of the lamp is in the different height position while maintaining the orientation of the light-emitting element (140), the light emitting face (142) is positioned in a position which has been rotated about a reference axis (N) which is orthogonal to the light-emitting face (242) when the light-emitting element (140) is in the reference position (240).
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同族专利:
公开号 | 公开日
KR101726487B1|2017-04-12|
CN104864337B|2017-09-29|
JP6271292B2|2018-01-31|
CN104864337A|2015-08-26|
US9243772B2|2016-01-26|
DE102015203362A1|2015-08-27|
JP2015159088A|2015-09-03|
US20150241010A1|2015-08-27|
FR3017925B1|2017-11-24|
KR20150100495A|2015-09-02|
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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 |
2017-04-21| PLSC| Publication of the preliminary search report|Effective date: 20170421 |
2017-12-27| PLFP| Fee payment|Year of fee payment: 4 |
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
JP2014034360A|JP6271292B2|2014-02-25|2014-02-25|Vehicle lighting|
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