JP7326896B2 - vehicle lamp - Google Patents

Description

The present disclosure relates to vehicle lamps.

Vehicle lamps that illuminate the surroundings of a vehicle have been considered (see, for example, Patent Document 1, etc.).

This vehicle lamp forms an irradiation pattern around the vehicle by projecting the irradiation pattern onto the road surface around the vehicle.

US2018/0257546

However, since the above technique simply projects an irradiation pattern onto the road surface around the vehicle, it becomes difficult to recognize the shape of the irradiation pattern unless the light intensity of the light source is increased.

The present disclosure has been made in view of the above circumstances, and an object of the present disclosure is to provide a vehicular lamp capable of facilitating recognition of the shape of an irradiation pattern without causing an increase in the amount of light from a light source.

A vehicle lamp according to the present disclosure includes a light source and a projection lens that projects light emitted from the light source to form an irradiation pattern having a plurality of light-dark boundary lines. characterized by collecting and emphasizing light on at least a part of

According to the vehicle lamp of the present disclosure, it is possible to easily recognize the shape of the irradiation pattern without causing an increase in the amount of light from the light source.

FIG. 3 is an explanatory diagram showing how the vehicle lamp according to the present disclosure is mounted on a vehicle to form an irradiation pattern; FIG. 2 is an explanatory diagram showing the configuration of the vehicle lamp of Example 1; FIG. 5 is an explanatory diagram showing how the optical settings of the projection lens are adjusted, and shows the relationship between a plurality of light distribution images of the light source on the screen and the irradiation pattern. FIG. 4 is an explanatory diagram showing the shape of the exit surface of the projection lens; FIG. 4 is an explanatory diagram showing the shape of the incident surface of the projection lens; It has a shape suitable for forming a diffuse light distribution pattern having a FIG. 4 is an explanatory diagram showing a usage example as an example of an irradiation pattern formed by a vehicle lamp; FIG. 10 is an explanatory diagram showing another example of a state in which the vehicle lamp is mounted on the vehicle to form an irradiation pattern;

A first embodiment of a vehicle lamp 10 as an example of a vehicle lamp according to the present disclosure will be described below with reference to the drawings. Note that FIG. 1 exaggerates the size of the vehicle lamp 10 relative to the vehicle 1 in order to facilitate understanding of how the vehicle lamp 10 is installed, and does not necessarily match the actual situation. not something to do.

A vehicle lamp 10 of Example 1 according to one embodiment of the vehicle lamp according to the present disclosure will be described with reference to FIGS. 1 to 7. FIG. A vehicle lamp 10 of Embodiment 1 is used as a lamp for a vehicle 1 such as an automobile, as shown in FIG. An irradiation pattern Pi is formed. Here, the surrounding area of the vehicle 1 necessarily includes a proximity area closer to the vehicle 1 than the headlight area illuminated by the headlights provided in the vehicle 1, and partially includes the headlight area. In some cases. In the first embodiment, the vehicle lamps 10 are arranged in the left and right lamp chambers in the front part of the vehicle. The lamp chamber is formed by covering the open front end of the lamp housing with an outer lens. The vehicle lamp 10 is provided with the optical axis La inclined with respect to the road surface 2 . This is because the lamp chamber is provided at a position higher than the road surface 2 . In the following description, as shown in FIG. 2, in the vehicle lamp 10, the direction in which the optical axis La extends, which is the direction in which light is emitted, is the optical axis direction (Z in the drawing), and the optical axis direction is the horizontal plane. The vertical direction (Y in the drawings) is defined as the vertical direction, and the horizontal direction (horizontal direction) perpendicular to the optical axis direction and the vertical direction is defined as the width direction (X in the drawings).

A vehicle lamp 10 is assembled with a light source unit 11 and a projection lens 12, and constitutes a direct projection type road surface projection unit. The vehicular lamp 10 is installed in the vehicle 1 in a state in which the light source unit 11 and the projection lens 12 are assembled and housed in a housing as appropriate.

The light source unit 11 has a light source 21 mounted on a substrate 22 . The light source 21 is composed of a light-emitting element such as an LED (Light Emitting Diode), and is provided with an output optical axis aligned with the optical axis La. In Example 1, the light source 21 emits monochromatic light of amber color with a Lambertian distribution centered on the optical axis La (one peak in a graph in which the vertical axis is the light amount and the horizontal axis is the wavelength). do. The light source 21 has a light emitting portion (a region for emitting monochromatic light) that is rectangular when viewed from the optical axis direction. In the light emitted from the light source 21, the color (wavelength band), the mode of distribution, the number of colors (the number of peaks in the above graph), etc. may be appropriately set. Not limited.

The substrate 22 appropriately supplies power from the lighting control circuit to light the light source 21 . The substrate 22 is formed in a plate shape and has a square shape when viewed from the optical axis direction. The substrate 22 is provided with mounting holes 22a at four corners.

The substrate 22 uses aluminum in the first embodiment, and functions also as a heat sink member that releases heat generated by the mounted light source 21 to the outside. Note that the substrate 22 may be provided with a plurality of heat radiation fins as appropriate. Further, the light source unit 11 may have a configuration in which another heat dissipation member is attached to the substrate 22 . Light emitted from the light source 21 of the light source unit 11 is projected onto the road surface 2 by the projection lens 12 .

The projection lens 12 includes a lens main body portion 23 which is a rectangular convex lens when viewed in the optical axis direction, and mounting portions 24 provided on both sides. It should be noted that this quadrangular shape may be rectangular or curved on each side as long as it has four corners (including those chamfered into spherical surfaces or the like). The lens main body 23 shapes and projects the light from the light source 21 to form an irradiation pattern Pi on the projection target (the road surface 2 in the first embodiment). there is Optical settings in the lens body 23 (projection lens 12) will be described later. The projection lens 12 has a lens axis extending in the optical axis direction. The lens axis is an axis that is the optical center of the lens main body 23 .

The mounting portions 24 are provided in pairs on both sides in the width direction of the lens main body portion 23, and protrude rearward in the optical axis direction (toward the light source portion 11). Each mounting portion 24 is provided with a mounting protrusion 27 at an end portion in the vertical direction. Each mounting projection 27 has a columnar shape projecting rearward in the optical axis direction, and can be fitted into a mounting hole 22 a of the substrate 22 . By fitting the mounting protrusions 27 into the corresponding mounting holes 22 a , the mounting portion 24 aligns the lens axis of the lens main body portion 23 with the optical axis La of the light source 21 of the light source portion 11 .

The projection lens 12 is provided with a diffusing portion 28 on the end face in the left-right direction. The end surfaces in the left-right direction have both side surfaces 23 a of the lens body portion 23 and outer side surfaces 24 a of the mounting portions 24 . The diffusing portion 28 diffuses the light that is guided into the projection lens 12 and emitted from the side surfaces 23a and the outer side surface 24a. formed by

Next, optical settings of the lens main body 23 (projection lens 12) will be described with reference to FIGS. 3 to 5. FIG. FIG. 3 shows an irradiation pattern Pi formed on a screen arranged perpendicular to the optical axis La, which has a shape different from that projected onto the road surface 2 . Also, FIG. 5 shows the projection lens 12 with only the lens body portion 23 and the mounting portion 24 omitted. Below, let the direction orthogonal to the optical axis La be a radial direction. As shown in FIG. 3 , the lens main body 23 has a rectangular outline (shape) of the irradiation pattern Pi formed on the projection target, which is the same as that of the projection lens 12 . In other words, the irradiation pattern Pi is formed by being surrounded by four bright/dark boundary lines B. As shown in FIG. The light-dark boundary line B, when shown individually, is defined as an upper boundary line B1 on the upper side in the vertical direction, a lower boundary line B2 on the lower side in the vertical direction, a right boundary line B3 on the right side in the width direction, and a width The left side of the direction is the left boundary line B4. When the irradiation pattern Pi is projected onto the road surface 2, the optical axis La is inclined with respect to the road surface 2, so that the irradiation pattern Pi has a substantially trapezoidal shape as shown in FIG.

The lens main body 23 diverges the light from the light source 21 into a luminous flux passing through the vicinity of the optical axis La in the radial direction in a cross section including the optical axis direction and the width direction, that is, a cross section perpendicular to the vertical direction. A light beam passing through a position away from the optical axis La in the direction is made parallel. That is, the lens main body 23 has a Lambertian distribution and diffuses light in the vicinity of the optical axis La where the amount of light is high, and collects the light outward from the vicinity of the optical axis La. For this reason, the lens main body 23 disperses the light from the light source 21 substantially uniformly in the cross section, that is, in the width direction, so that the light amount distribution is substantially equal, and the light-dark boundary line B of the irradiation pattern Pi formed by projection. Light is focused on the right boundary line B3 and the left boundary line B4 located in the width direction in , and both boundary lines B3 and B4 are emphasized.

Further, as shown in FIG. 4, the lens main body 23 is formed of an upper lens portion 31 and a lower lens portion 32 in the vertical direction with the optical axis La as the center. In the lens body portion 23, the upper lens portion 31 forms the far side pattern portion Pf (see FIG. 3) in the irradiation pattern Pi, and the lower lens portion 32 forms the near side pattern portion Pn (see FIG. 3) in the irradiation pattern Pi. to form The far-side pattern portion Pf is a side away from the vehicle lamp 10 (vehicle 1) in the irradiation pattern Pi, that is, a far portion. The near-side pattern portion Pn is the side of the irradiation pattern Pi that is closer to the vehicle lamp 10 (vehicle 1), that is, the near portion. The lens main body portion 23 includes a near side pattern portion Pn formed by the front end portion (near side pattern portion Pn side) of the far side pattern portion Pf formed by the upper lens portion 31 and a near side pattern portion Pn formed by the lower side lens portion 32 . (the end on the far side pattern portion Pf side) are overlapped and projected, and a line portion Lp with a higher light quantity (brighter) than the surroundings is formed at the overlapped portion.

The upper lens portion 31 diverges the light from the light source 21 into a luminous flux passing through the vicinity of the optical axis La in a radial direction in a longitudinal section including the optical axis direction and the vertical direction, that is, a longitudinal section perpendicular to the width direction. A light beam passing through a position away from the optical axis La in the direction is made parallel. That is, the upper lens portion 31 has a Lambertian distribution and diffuses light in the vicinity of the optical axis La where the amount of light is high, and collects the light outward from the vicinity of the optical axis La. For this reason, the upper lens portion 31 disperses the light from the light source 21 in a longitudinal section, that is, the upper side in the vertical direction, substantially evenly so as to have a substantially equal light amount distribution, and the far side pattern portion Pf formed by projection. Light is collected on the upper boundary line B1 positioned above the light-dark boundary line B in the vertical direction to emphasize the upper boundary line B1.

In the longitudinal section, the lower lens portion 32 diverges the light from the light source 21 into a luminous flux passing in the vicinity of the optical axis La in the radial direction, and parallelizes the luminous flux passing through a position away from the optical axis La in the radial direction. Let That is, the lower lens portion 32 has a Lambertian distribution and diffuses the light in the vicinity of the optical axis La where the amount of light is high, and collects the light outward from the vicinity of the optical axis La. For this reason, the lower lens part 32 disperses the light from the light source 21 substantially uniformly so as to have a substantially equal light amount distribution in the longitudinal section, that is, the lower side in the vertical direction, and also disperses the near side pattern formed by projection. Light is collected on the lower boundary line B2 located below the light-dark boundary line B of the portion Pn in the vertical direction to emphasize the lower boundary line B2.

Thus, the irradiation pattern Pi is formed by the far side pattern portion Pf and the near side pattern portion Pn. As shown in FIG. 3, the irradiation pattern Pi forms a light-dark boundary line B on the screen by appropriately overlapping a plurality of light distribution images Li of the light source 21 . Here, although each light distribution image Li is basically in a square shape by being projected by the light source 21 , the formed position and shape change according to the optical setting in the lens main body 23 . Since the lens main body 23 is optically set as described above, the irradiation pattern Pi is basically formed with the above-described distribution. (its outer edges) may not align properly, and the light/dark boundary B may not be clearly defined. For this reason, the lens main body 23 is optically set so as to appropriately align the light distribution images Li forming the outer edge in the irradiation pattern Pi. Here, the lens body 23 can adjust the position where each light distribution image Li is formed by mainly adjusting the shape of the exit surface 26 on the screen, and mainly by adjusting the shape of the entrance surface 25. By adjusting, the shape of each light distribution image Li can be adjusted.

The exit surface 26 is arranged on the screen so that the light distribution images Li forming the outer edges of the irradiation pattern Pi are appropriately aligned so that the outer edges of the light distribution images Li are aligned to form a line (light-dark boundary line B). Then, the curvature (surface shape) of the corresponding portion is adjusted. That is, the light distribution image Li shifted upward from the upper boundary line B1 is shifted downward, the light distribution image Li shifted downward from the lower boundary line B2 is shifted upward, and to the right of the right boundary line B3. The curvature of the corresponding portion of the output surface 26 is adjusted so that the light distribution image Li shifted to the left side is shifted to the left side, and the light distribution image Li shifted to the left side of the left boundary line B4 is shifted to the right side. In FIG. 3, the light distribution image Li at the left end shifted upward from the upper boundary line B1 is displaced downward, and the light distribution image Li at the right end shifted downward from the lower boundary line B2 is shifted upward. A state of displacement is indicated by a two-dot chain line.

The exit surface 26 has the shape shown in FIG. 4 due to the above settings. In FIG. 4, the darker the color, the larger the curvature, indicating a relative protrusion, and the lighter the color, the smaller the curvature, indicating a relative depression. Here, a straight line passing through the optical axis La and extending in the width direction is defined as a width direction line L1, and a straight line passing through the optical axis La and extending in the vertical direction is defined as a vertical direction line L2. The output surface 26 is relatively recessed around the width direction line L1 and the up-down direction line L2, and extends from the first quadrant when the width direction line L1 is the x-axis and the up-down direction line L2 is the y-axis. A portion corresponding to the fourth quadrant is made to protrude relatively. The output surface 26 has such a shape, so that all the light distribution images Li are arranged appropriately while forming a line by arranging the outer edges of the light distribution images Li, thereby forming the irradiation pattern Pi. be able to. As a result, the lens main body 23 can make the bright-dark boundary line B emphasized by the basic light quantity distribution described above more clear. Since a line is formed by arranging the outer edges of the respective light distribution images Li, each light distribution image Li is arranged inside the line and no light distribution image Li is arranged outside the line. Therefore, this line becomes a clear bright-dark boundary line B.

In addition, the surface shape of the incident surface 25 is adjusted so that the distortion in each light distribution image Li on the screen is reduced. Here, the incident surface 25 has the shape in the above-described transverse section and the shape in the above-described longitudinal section set individually.

As shown in FIG. 5, the incident surface 25 has a concave surface in cross section, that is, a curved surface protruding toward the side opposite to the light source 21 (the front side in the optical axis direction). This is because the distortion in each light distribution image Li increases when the incident surface 25 is flat compared to when it is concave, and the distortion in each light distribution image Li increases when the incident surface 25 is convex.

In addition, the incident surface 25 is a convex surface in a longitudinal section, that is, a curved surface protruding toward the light source 21 side (rear side in the optical axis direction). This is because when the incident surface 25 is flat, the distortion in each light distribution image Li is greater than when it is convex, and when the incident surface 25 is concave, the distortion in each light distribution image Li is further increased.

In this way, the incident surface 25 is a toroidal surface (toroidal lens) having different radii of curvature in the transverse section, that is, in the width direction, and in the vertical section, that is, in the vertical direction. If the incident surface 25 has a convex surface in the vertical section and a concave surface in the horizontal section, the respective curvature radii (curvatures) may be appropriately set. The incident surface 25 having such a shape can suppress distortion of each light distribution image Li, and the irradiation pattern Pi can be formed using each light distribution image Li. Thereby, the lens main body 23 can form the irradiation pattern Pi into a more desired shape. Compared to using each light distribution image Li with a large distortion, using each light distribution image Li with a small distortion forms a line by arranging the outer edges of each light distribution image Li as described above. This is because the light distribution image Li can be easily arranged appropriately up to the corner of the set light-dark boundary line B.

The vehicle lamp 10 is assembled as follows with reference to FIG. First, the light source 21 is mounted on the substrate 22 and the light source section 11 is assembled while being positioned with respect to the substrate 22 . After that, the mounting protrusions 27 of both mounting portions 24 of the projection lens 12 are fitted into the corresponding mounting holes 22a of the substrate 22 of the light source portion 11 to fix both mounting portions 24 to the substrate 22 . As a result, the light source unit 11 and the projection lens 12 are attached with the lens axis La of the light source 21 of the light source unit 11 aligned with the lens axis La of the lens main body unit 23 of the projection lens 12 at a predetermined distance. The vehicle lamp 10 is assembled.

The vehicle lamp 10 is installed in a lamp chamber with an optical axis La directed to the side of the vehicle 1 and inclined with respect to the road surface 2 around the vehicle 1 (see FIG. 1). The vehicle lamp 10 can appropriately turn on and off the light source 21 by supplying power from the lighting control circuit to the light source 21 from the substrate 22 . As shown in FIG. 1, the light from the light source 21 is projected while being controlled by the projection lens 12, so that the front end portion of the far side pattern portion Pf and the far end portion of the near side pattern portion Pn are projected. are overlapped to form an irradiation pattern Pi having a line portion Lp on the road surface 2 . The irradiation pattern Pi has a trapezoidal shape that widens with increasing distance from the vehicle 1 due to the fact that the optical axis La is inclined with respect to the road surface 2 . The irradiation pattern Pi can partially illuminate the road surface 2 on the left and right sides in the vicinity of the front end of the vehicle 1 . This irradiation pattern Pi is formed in conjunction with the turn lamps as an example in the first embodiment, and can inform the surroundings that the vehicle 1 is to turn right or left.

Next, the operation of this vehicle lamp 10 will be described with reference to FIG. In addition, in FIG. 6, the driver of the two-wheeled vehicle 3 is omitted for easy understanding. The vehicle lamp 10 is interlocked with the turn lamps, and when either the left or right turn lamp is turned on, the light source 21 provided on the turned-on side is turned on, and the irradiation pattern Pi is projected onto the road surface 2. to form. For example, FIG. 6 shows a scene in which a vehicle 1 traveling straight on the road is about to turn left. In the vehicle 1, the vehicle lamp 10 provided on the left front forms an irradiation pattern Pi on the road surface 2 by blinking the left turn lamp. Then, even if the driver of the two-wheeled vehicle 3 traveling behind the vehicle 1 cannot visually recognize the turn lamps of the vehicle 1, the driver can visually recognize the irradiation pattern Pi formed on the road surface 2. You can figure out that you can turn left.

In the vehicle 1, the left and right vehicle lamps 10 are linked to the turn lamps. Therefore, when both turn lamps are turned on as hazard lamps, the left and right vehicle lamps 10 simultaneously emit the irradiation pattern Pi. It will be formed on the road surface 2 (see FIG. 1). Therefore, the vehicular lamp 10 makes a person in the vicinity of the vehicle 1 more surely recognize that it is turned on as a hazard lamp, as compared with the case where only the left and right turn lamps are blinking. be able to.

Further, in the vehicle lamp 10, the projection lens 12 is optically set as described above, so that by collecting the light, it is possible to form an irradiation pattern Pi in which the four bright-dark boundary lines B forming the outline are sharp. For this reason, the vehicular lamp 10 makes it possible to recognize the shape of the irradiation pattern Pi without increasing the light intensity of the light source 21, and the formed irradiation pattern Pi can be used to inform people around the driver of some intention ( In Example 1, it is possible to convey right and left turns, etc.).

Here, the conventional vehicular lamp described in the prior art document simply projects an irradiation pattern onto the road surface around the vehicle, and does not emphasize the outline of the irradiation pattern (light-dark boundary line). For this reason, the conventional vehicular lamp forms a dimly lit area as an irradiation pattern, making it difficult to recognize the shape of the irradiation pattern. Such an irradiation pattern makes it difficult to distinguish whether it is formed by the light from the vehicle or the light from a different source from the vehicle. becomes difficult. In addition, it is conceivable that the irradiation pattern expresses some intention of the driver in terms of shape, but if it is difficult to recognize the shape, it becomes difficult to convey the intention. Therefore, in conventional vehicle lamps, it is conceivable to increase the light intensity of the light source in order to make it possible to recognize the shape of the irradiation pattern. etc.

On the other hand, in the vehicle lamp 10 of the present invention, the projection lens 12 concentrates the light from the light source 21 on each light-dark boundary line B of the irradiation pattern Pi to emphasize the light-dark boundary line of the irradiation pattern Pi. Line B is sharpened (see FIG. 1). Even when the vehicular lamp 10 forms an irradiation pattern Pi with approximately the same brightness as that of a conventional vehicular lamp, the vehicular lamp 10 more appropriately produces the irradiation pattern Pi (the shape) can be recognized. Therefore, the vehicular lamp 10 can recognize the irradiation pattern Pi (its shape) without increasing the light amount of the light source 21, as compared with the conventional vehicular lamp. Since the vehicular lamp 10 can make the surrounding people recognize the irradiation pattern Pi having the intended shape, it is possible to appropriately inform the surrounding people of some intention of the driver (such as turning right or left in the first embodiment). I can tell you.

In particular, since the vehicle lamp 10 of Example 1 uses the light source 21 as monochromatic light, the influence of chromatic aberration in the projection lens 12 can be greatly suppressed. Therefore, the vehicle lamp 10 can form an irradiation pattern Pi in which each bright-dark boundary line B is clearer.

In addition, the vehicular lamp 10 of the first embodiment has a front end portion of the far side pattern portion Pf formed by the upper lens portion 31 and a near side pattern portion Pn formed by the lower lens portion 32 in the irradiation pattern Pi. By overlapping the innermost end of the line portion Lp, the line portion Lp having a higher light quantity (brighter) than the surroundings is formed. Here, in the above-described conventional vehicle lamp, a line portion is formed in the irradiation pattern by providing a light source forming the line portion in addition to the light source forming the irradiation pattern. Therefore, unlike the conventional vehicle lamp, the vehicle lamp 10 forms the line portion Lp in the irradiation pattern Pi with a simple configuration including the light source unit 11 and the projection lens 12 without using a new light source. This makes it easier to recognize the irradiation pattern Pi.

The vehicle lamp 10 of Example 1 has diffusion portions 28 on both side surfaces 23 a of the lens main body 23 and outer side surfaces 24 a of the mounting portions 24 , which are end surfaces in the left-right direction of the projection lens 12 . Therefore, in the vehicle lamp 10, even when the light from the light source 21 guided into the projection lens 12 is emitted from both side surfaces 23a of the lens main body 23 and the outer side surfaces 24a of the mounting portions 24, , the light can be diffused by the diffuser 28 . As a result, the vehicle lamp 10 can prevent the light emitted from the side surfaces 23a and the outer side surfaces 24a from becoming leakage light that illuminates the irradiation pattern Pi and unintended portions around it. Therefore, the vehicular lamp 10 can suppress blurring of the light-dark boundary lines B due to leaked light, can more appropriately emphasize the light-dark boundary lines B, and can appropriately form the irradiation pattern Pi.

The vehicle lamp 10 of Example 1 can obtain the following effects.

The vehicle lamp 10 includes a light source 21 and a projection lens 12 that projects light emitted from the light source 21 to form an irradiation pattern Pi having a plurality of contrast boundary lines B. At least part of the boundary line B is focused and emphasized. Therefore, the vehicular lamp 10 can make at least a part of the bright-dark boundary line B in the irradiation pattern Pi clear, so that the shape of the irradiation pattern Pi can be easily recognized. The vehicle lamp 10 makes it easy to recognize the shape of the irradiation pattern Pi by the light source unit 11 and the projection lens 12 without causing an increase in the light amount of the light source 21. Therefore, the vehicle lamp 10 can be compared with the conventional vehicle lamp. can be used to simplify the configuration.

In the vehicular lamp 10, the projection lens 12 converges the light from the light source 21 inside the light/dark boundary line B, while diffusing the light at other portions of the irradiation pattern Pi. Therefore, the vehicle lamp 10 can easily form the irradiation pattern Pi (its shape) by controlling the light from the light source 21 by the projection lens 12, and the irradiation pattern Pi can be formed more appropriately. can be formed.

Further, in the vehicle lamp 10, the exit surface 26 of the projection lens 12 is a convex surface, and the periphery of the width direction line L1 passing through the optical axis La and the periphery of the vertical direction line L2 passing through the optical axis La are separated from each other. It is recessed against. Therefore, the vehicular lamp 10 can position each light distribution image Li forming the irradiation pattern Pi inside the emphasized light-dark boundary line B, and the light-dark boundary line B can be made clearer.

In the vehicle lamp 10, the incident surface 25 of the projection lens 12 is convex in a cross section perpendicular to the width direction and concave in a cross section perpendicular to the vertical direction. Therefore, the vehicle lamp 10 can effectively suppress distortion in each light distribution image Li forming the irradiation pattern Pi, and can form the irradiation pattern Pi more appropriately.

In the vehicle lamp 10, the projection lens 12 is formed by an upper lens portion 31 and a lower lens portion 32 in the vertical direction, and the upper lens portion 31 forms a far side pattern portion Pf which is a distant portion in the irradiation pattern Pi, The lower lens part 32 forms a near side pattern part Pn which is a near part in the irradiation pattern Pi. The vehicular lamp 10 overlaps the front end portion of the far side pattern portion Pf and the far end portion of the near side pattern portion Pn to form a line portion Lp with a higher light amount than the surroundings in the irradiation pattern Pi. forming. Therefore, the vehicle lamp 10 can form the line portion Lp in the irradiation pattern Pi with a simple configuration including the light source portion 11 and the projection lens 12 .

In the vehicle lamp 10 , the projection lens 12 is provided with a diffuser 28 on at least a portion other than the entrance surface 25 and the exit surface 26 . Therefore, the vehicular lamp 10 can suppress blurring of the bright-dark boundary line B emphasized by leaked light, can more appropriately emphasize the bright-dark boundary line B, and can appropriately form the irradiation pattern Pi.

Therefore, the vehicle lamp 10 of Example 1 as the vehicle lamp according to the present disclosure can easily recognize the shape of the irradiation pattern Pi without increasing the light amount of the light source 21 .

Although the vehicle lamp of the present disclosure has been described above based on the first embodiment, the specific configuration is not limited to the first embodiment, and is outside the gist of the invention according to each claim. Design changes, additions, etc. are permitted unless

In addition, in Example 1, the irradiation pattern Pi is made into a quadrangular shape having four light-dark boundary lines B. As shown in FIG. However, the irradiation pattern Pi is formed on the road surface 2 around the vehicle 1, and informs the surrounding people of some intention of the driver, and includes a plurality of corners (including those chamfered into a spherical surface, etc.). ) and a plurality of light-dark boundary lines B, the number and shape of the corners may be appropriately set, and the configuration is not limited to that of the first embodiment.

Further, in Example 1, the projection lens 12 concentrates and emphasizes the light on the four bright/dark boundary lines B, that is, on all sides of the rectangular irradiation pattern Pi. However, if the projection lens 12 collects and emphasizes light on at least a part of each bright-dark boundary line B of the irradiation pattern Pi, the range of the bright-dark boundary line B to be emphasized may be appropriately set. Not limited. In this case, for example, in the rectangular irradiation pattern Pi as in the first embodiment, only one side (one bright-dark boundary line B) farthest from the vehicle 1 is not emphasized, as shown in FIG. , the shape of the irradiation pattern Pi can be easily recognized, and the state of moving away from the vehicle 1 can be shown.

Furthermore, in the first embodiment, the projection lens 12 is provided with diffusion portions 28 on both side surfaces 23 a of the lens main body portion 23 and on the outer side surfaces 24 a of the mounting portions 24 . However, if the diffusing portion 28 is a portion other than the entrance surface 25 and the exit surface 26 of the projection lens 12 and the light from the light source 21 guided into the projection lens 12 becomes leaked light, both side surfaces Other than 23a and both outer side surfaces 24a may be provided as appropriate, and the configuration is not limited to that of the first embodiment.

In Example 1, the projection lens 12 superimposes and projects the near end of the far side pattern portion Pf and the far end of the near side pattern portion Pn to form the irradiation pattern Pi having the line portion Lp. ing. However, if the projection lens 12 projects the light emitted from the light source 21 to form a polygonal irradiation pattern Pi having a plurality of bright-dark boundary lines B, the line portion Lp may not be formed. , the line portion Lp of other shapes may be formed, and the configuration is not limited to that of the first embodiment. The position and shape of the line portion Lp can be set by adjusting the shape of the front end portion of the far side pattern portion Pf and the shape of the far end portion of the near side pattern portion Pn. It can be a curved line or a curved line.

10 Vehicle lamp 12 Projection lens 21 Light source 25 Entrance surface 26 Output surface 31 Upper lens portion 32 Lower lens portion L1 Width direction line L2 Vertical direction line La Optical axis Lp Line portion B Boundary line Pf Far side pattern portion Pn Near side Side pattern part Pi Irradiation pattern

Claims (7)

a light source;
a projection lens that projects the light emitted from the light source to form an irradiation pattern having a plurality of bright and dark boundaries;
the projection lens concentrates and emphasizes light on at least a portion of the light-dark boundary ;
the projection lens converges the light from the light source inside the light/dark boundary and diffuses the light at other locations in the irradiation pattern;
The exit surface of the projection lens is a convex surface, and the periphery of the vertical line extending in the vertical direction passing through the optical axis and the periphery of the width direction line extending in the width direction passing through the optical axis are recessed with respect to other portions. A vehicle lamp characterized by: 2. The vehicle lamp according to claim 1, wherein the incident surface of the projection lens has a convex surface in a cross section perpendicular to the width direction and a concave surface in a cross section perpendicular to the vertical direction. the projection lens is formed of an upper lens part and a lower lens part in a vertical direction,
The upper lens part forms a far side pattern part that is a distant part in the irradiation pattern,
The lower lens part forms a near side pattern part that is a close part in the irradiation pattern,
The projection lens forms, in the irradiation pattern, a line portion with a higher amount of light than the periphery by overlapping the front end portion of the far side pattern portion and the back end portion of the near side pattern portion. The vehicle lamp according to claim 1 or 2, characterized by: 4. The vehicle lamp according to any one of claims 1 to 3, wherein the projection lens is provided with a diffusing portion on at least a portion other than the entrance surface and the exit surface . a light source;
a projection lens that projects the light emitted from the light source to form an irradiation pattern having a plurality of bright and dark boundaries;
the projection lens concentrates and emphasizes light on at least a portion of the light-dark boundary;
A vehicular lamp, wherein an incident surface of the projection lens is convex in a cross section perpendicular to the width direction and concave in a cross section perpendicular to the vertical direction. a light source;
a projection lens that projects the light emitted from the light source to form an irradiation pattern having a plurality of bright and dark boundaries;
the projection lens concentrates and emphasizes light on at least a portion of the light-dark boundary;
the projection lens is formed of an upper lens part and a lower lens part in a vertical direction,
The upper lens part forms a far side pattern part that is a distant part in the irradiation pattern,
The lower lens part forms a near side pattern part that is a close part in the irradiation pattern,
The projection lens forms, in the irradiation pattern, a line portion with a higher amount of light than the periphery by overlapping a front end portion of the far side pattern portion and a rear end portion of the near side pattern portion. A vehicle lamp characterized by: a light source;
a projection lens that projects the light emitted from the light source to form an irradiation pattern having a plurality of bright and dark boundaries;
the projection lens concentrates and emphasizes light on at least a portion of the light-dark boundary;
A vehicular lamp, wherein the projection lens is provided with a diffusing portion on at least a portion other than the entrance surface and the exit surface.