Vehicle lighting

Abstract

The present invention provides a vehicle lamp having a simple structure and capable of achieving a desired light distribution on a shading component. The vehicle lamp (10) comprises: a first light source (21) and a second light source (22) having light-emitting surfaces (21a, 22a) and arranged in a predetermined parallel direction (Dp); a single condensing lens (12) for converging light emitted from the first light source (21) and the second light source (22); a shading component (13) provided with an irradiation slit (26) for partially passing the light condensed by the condensing lens (12); and a projection lens (14) for projecting light after passing through the shading component to form an irradiation pattern (Pi). The first light source (21) and the second light source (22) are arranged at a distance (d) greater than the dimension of the luminous surfaces in the parallel direction (Dp). The condensing lens (12) forms a high light intensity area (HA) with the highest light intensity on the shading component, thereby achieving a single light distribution in the parallel direction (Dp).

Description

Technical Field

[0001] The present disclosure relates to a vehicle lamp. Background Art

[0002] It is considered that the vehicle lamp forms an illumination pattern on the road surface around the vehicle.

[0003] In order to brighten the illumination pattern in such a vehicle lamp, it is considered to provide multiple light sources in a single projection optical system (see, for example, Patent Document 1). This vehicle lamp forms a bright illumination pattern by guiding light from the multiple light sources to a light shielding member using multiple light guides.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: Japanese Patent Application Publication No. 2019-192350 Summary of the Invention

[0007] Problems to be solved by the invention

[0008] However, since the vehicle lamp has a plurality of light guides corresponding to the plurality of light sources, the structure becomes complicated and adjustment of the light distribution on the light shielding member becomes difficult.

[0009] The present disclosure has been made in view of the above circumstances, and an object thereof is to provide a vehicle lamp having a simple structure and capable of achieving a desired light distribution on a light shielding member.

[0010] Solutions to Problems

[0011] The vehicle lamp disclosed in the present invention is characterized in that it comprises: a first light source and a second light source, which have light-emitting surfaces and are arranged in a predetermined parallel direction; a single focusing lens, which converges light emitted from the first light source and the second light source; a shading component, which is provided with an illumination slit for partially allowing the light converged by the focusing lens to pass through; and a projection lens, which projects the light after passing through the shading component to form an illumination pattern, the first light source and the second light source are arranged in a manner that is greater than the size of the light-emitting surfaces in the parallel direction, and the focusing lens forms a high-light-intensity area with the highest light intensity on the shading component to form a single light distribution in the parallel direction.

[0012] The effects of the invention are as follows.

[0013] According to the vehicle lamp disclosed herein, the structure is simple and the light distribution on the light shielding member can be made into a desired light distribution. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is an explanatory diagram showing a state where the vehicle lamp according to the first embodiment of the present disclosure is mounted on a vehicle and an illumination pattern is formed.

[0015] Figure 2 It is an explanatory diagram showing the structure of the vehicle lamp according to the first embodiment.

[0016] Figure 3 It is an explanatory diagram showing a first light source and a second light source provided on a substrate.

[0017] Figure 4 It is an explanatory diagram showing an irradiation pattern projected onto a road surface.

[0018] Figure 5 It is an explanatory diagram showing an optical filter.

[0019] Figure 6 This is an explanatory diagram showing the structure of a condenser lens in a transverse cross section including the optical axis direction and the width direction.

[0020] Figure 7 This is an explanatory diagram showing, in a transverse cross section of a vehicle lamp, how light travels from a first light source through a first incident surface portion and through a condenser lens.

[0021] Figure 8 It shows Figure 7 The diagram shows the light distribution on the filter produced by the light shown.

[0022] Figure 9 This is an explanatory diagram showing, in a transverse cross section of a vehicle lamp, how light from a second light source passes through a first incident surface portion and then through a condenser lens.

[0023] Figure 10 This is an explanatory diagram showing, in a transverse cross section of a vehicle lamp, how light from a second light source passes through an intermediate incident surface portion and then through a condenser lens.

[0024] Figure 11 It shows Figure 9 The light and Figure 10 The diagram shows the light distribution on the filter produced by the light shown.

[0025] Figure 12 It shows that Figure 8 Light distribution and Figure 11 An explanatory diagram of the light distribution on the filter after the light distribution of is superimposed.

[0026] Figure 13 It is an explanatory diagram showing the light distribution on the optical filter when the first light source and the second light source are turned on.

[0027] Figure 14 is Figure 13 An explanatory diagram showing the light distribution of a light source superimposed on the irradiation slits.

[0028] Figure 15 This is an explanatory diagram showing a usage example as an example of an illumination pattern formed by a vehicle lamp.

[0029] Figure 16 This is an explanatory diagram showing a state in which a vehicle lamp according to another example of the present disclosure is mounted on a vehicle and forms an illumination pattern. DETAILED DESCRIPTION

[0030] Hereinafter, a first embodiment of a vehicle lamp 10 as an example of the vehicle lamp of the present disclosure will be described with reference to the accompanying drawings. Figure 1 In order to easily understand the situation in which the vehicle lamp 10 is provided, the vehicle lamp 10 is emphasized relative to the vehicle 1, which does not necessarily correspond to the actual situation. Figure 6 、 Figure 7 、 Figure 9 、 Figure 10 In order to easily understand the structure of the condenser lens 12 and the situation in which light advances in the condenser lens 12, the hatching added to each cross-section is omitted. Figure 6 In order to make the middle range Mr easier to understand, the portions corresponding to the middle range Mr are indicated with dots.

[0031] Example 1

[0032] use Figures 1 to 15 A vehicle lamp 10 according to Example 1 of one embodiment of the vehicle lamp disclosed herein will be described. Figure 1 As shown, the vehicle lamp 10 of Example 1 is used as a lamp for a vehicle 1 such as an automobile, and forms an illumination pattern Pi on the road surface 2 in the vicinity in front of the vehicle 1 independently of the headlights provided on the vehicle 1. The vicinity in front of the vehicle 1 necessarily includes a proximity area that is closer to the vehicle 1 than the headlight area illuminated by the headlights provided on the vehicle 1, and sometimes also partially includes the headlight area. In Example 1, the vehicle lamp 10 is arranged in lamp chambers on the left and right sides of the front portion 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 sets the projection optical axis Lp in the lamp chamber in a tilted state relative 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, in the vehicle lamp 10, the direction in which the projection optical axis Lp, which is the direction of the irradiated light, extends is referred to as the optical axis direction (Z in the drawings), the vertical direction when the optical axis direction is aligned with the horizontal plane is referred to as the up-down direction (Y in the drawings), and the direction (horizontal direction) perpendicular to the optical axis direction and the up-down direction is referred to as the width direction (X in the drawings) (see FIG. Figure 2 wait).

[0033] like Figure 2 As shown, the vehicle lamp 10 is configured as a single projection optical system. A housing 15 houses a light source 11, a condenser lens 12, a filter 13, and a projection lens 14, thereby forming a projector-type road projection unit. The housing 15 is composed of a semi-cylindrical lower component 15a and an upper component 15b. With the aforementioned components (12 to 14) mounted on the lower component 15a, the lower component 15a and the upper component 15b are engaged with each other, sandwiching a mounting platform 16. The housing 15 is provided with a condenser lens groove 15c for embedding the condenser lens 12, a filter hole 15d for embedding the filter 13, and a projection lens groove 15e for embedding the projection lens 14 (only the lower component 15a side is shown in the figure). The shape of the housing 15 can be appropriately set and is not limited to the structure of Example 1.

[0034] The mounting platform 16 is a component for mounting the light source 11. It is formed from thermally conductive aluminum die-casting or resin and has a mounting portion 16a and a heat dissipation portion 16b. The mounting portion 16a is where the light source 11 (its substrate 23) is mounted and is formed into a flat plate perpendicular to the optical axis. A connecting wall 16c is provided at the mounting portion 16a, surrounding the light source 11. When the lower component 15a and the upper component 15b are engaged, the front end 16d on the front side in the optical axis direction is sandwiched between the lower component 15a and the upper component 15b, thereby connecting the connecting wall 16c to the housing 15.

[0035] The heat dissipation portion 16b functions as a heat sink that dissipates heat generated by the light source unit 11 to the outside. This heat dissipation portion 16b is provided continuously with the installation portion 16a and includes a plurality of heat dissipation fins 16e. Heat dissipation portion 16b dissipates heat generated by the light source unit 11 installed in the installation portion 16a to the outside through each heat dissipation fin 16e.

[0036] The light source unit 11 includes a first light source 21, a second light source 22, and a substrate 23 on which the two light sources are mounted. The first light source 21 and the second light source 22 are composed of light emitting elements such as LEDs (Light Emitting Diodes) and are arranged in a parallel direction Dp (refer to FIG. Figure 3 ) and their emission optical axes Li are parallel (refer to Figure 6). In addition, when the outgoing optical axis Li is recorded separately, the outgoing optical axis of the first light source 21 is set to the first outgoing optical axis Li1, and the outgoing optical axis of the second light source 22 is set to the second outgoing optical axis Li2. In Example 1, the first light source 21 and the second light source 22 emit amber light (light having the largest peak in the amber band and substantially close to amber monochromatic light in a graph in which the vertical axis is set to the light amount and the horizontal axis is set to the wavelength) in a Lambertian distribution with the outgoing optical axis Li as the center). In addition, the first light source 21 and the second light source 22 can appropriately set the color (band), distribution method, number of colors (the number of peaks in the above-mentioned graph), etc., and can emit light of other colors or white light, and are not limited to the structure of Example 1.

[0037] like Figure 3 As shown, the first light source 21 and the second light source 22 respectively have a first light-emitting surface 21a and a second light-emitting surface 22a that are rectangular when viewed along the optical axis. In Example 1, the first light-emitting surface 21a and the second light-emitting surface 22a are configured to have the same shape and size, and are configured to have the same posture. The first light source 21 and the second light source 22 are configured to have a positional relationship in which the first light-emitting surface 21a and the second light-emitting surface 22a are separated by a distance d. In Example 1, the parallel direction Dp is configured to be parallel to the width direction. The distance d is configured to be equal to or larger than the width dimension (width dimension w) of the first light-emitting surface 21a and the second light-emitting surface 22a.

[0038] The substrate 23 is mounted on the installation portion 16a of the installation base 16 and is mounted with the first light source 21 and the second light source 22. The substrate 23 is provided with a lighting control circuit, which supplies power appropriately to illuminate the first light source 21 and the second light source 22. When the substrate 23 is mounted on the installation portion 16a of the installation base 16, the housing 15 is connected to the connecting wall 16c, so that the substrate 23 is located at the rear end of the housing 15 (the end opposite the projection lens groove 15e in the optical axis direction) and faces the condenser lens 12 (its incident surface 31) housed in the housing 15.

[0039] like Figure 2 As shown, the condenser lens 12 converges the light emitted from the first light source 21 and the second light source 22, and focuses the light on the filter 13. In the embodiment 1, the condenser lens 12 is basically configured as two convex lenses, with an incident surface 31 and an exit surface 32 (see Figure 6etc.) are set as free curved surfaces. The optical settings of the incident surface 31 and the exit surface 32 are described below. In the focusing lens 12, flange portions 33 are provided at both ends in the width direction. Each flange portion 33 is configured to be embedded in the focusing lens groove 15c of the housing 15. The focusing lens 12 has a lens axis Lr extending along the optical axis direction. The lens axis Lr is an axis that becomes the optical center of the focusing lens 12. If the flange portion 33 of the focusing lens 12 is embedded in the focusing lens groove 15c, the direction in which the lens axis Lr extends is consistent with the projection optical axis Lp.

[0040] The filter 13 is an example of a light shielding member that partially passes the light from the first light source 21 and the second light source 22 focused by the condenser lens 12 to form an irradiation pattern Pi. Figure 1 As shown in FIG. 1 , the irradiation pattern Pi has three irradiation patterns Di arranged at approximately equal intervals in a direction away from the vehicle 1. Figure 4 As shown, each irradiation pattern Di is configured as a widely opened V-shape and is approximately equal in size. Here, when each irradiation pattern Di is shown separately, the irradiation pattern farthest from the vehicle 1 is designated as the first irradiation pattern Di1, and as it approaches the vehicle 1 from this point, the second irradiation pattern Di2 and the third irradiation pattern Di3 are designated in order. Therefore, in the irradiation pattern Pi, the first irradiation pattern Di1 is the farthest portion, and the third irradiation pattern Di3 is the closest portion. By arranging the three irradiation patterns Di so that the vertices of the V-shape are approximately on a straight line, the irradiation pattern Pi can be made to look like an arrow indicating a predetermined direction from the vehicle 1. The direction indicated by the arrow of the irradiation pattern Pi, that is, the direction in which the vertices of the V-shape of each irradiation pattern Di are arranged, is designated as the arrow direction Da, and the side indicated by this direction (the side of the first irradiation pattern Di1) is designated as the front side of the arrow direction Da.

[0041] Each illumination pattern Di is formed as an inclined straight line. Specifically, its two side ends Die, located perpendicular to the arrow direction Da, face inward (inward when viewed from the side of the vehicle turning indicated by the arrow direction Da) as it moves toward the rear of the arrow direction Da. In other words, the two side ends Die in each illumination pattern Di are inclined inward relative to the arrow direction Da. The direction in which the straight line extending from these two side ends Die extends is referred to as the side end direction De. The illumination pattern Pi formed by these three illumination patterns Di is formed by the filter 13. The filter 13 has the same structure regardless of whether it is located on the left or right side of the vehicle 1.

[0042] like Figure 5 As shown, the filter portion 24 of the filter 13 is provided in a filter frame portion 25. The filter frame portion 25 is provided in a circular frame shape surrounding the filter portion 24 and is provided so as to be embedded in the filter hole 15d of the housing 15 (see FIG. Figure 1 ).

[0043] The filter portion 24 is formed from a plate-shaped film member that substantially blocks the transmission of light and is provided with illumination slits 26. The illumination slits 26 partially transmit the light from the first and second light sources 21 and 22, focused by the condenser lens 12, thereby shaping the illumination pattern Pi into a predetermined shape. The illumination slits 26 correspond to the illumination pattern Pi and, in Example 1, are comprised of three slit portions 27. Each slit portion 27 corresponds one-to-one to the three illumination patterns Di. Like each illumination pattern Di, they are formed in a widely open V-shape, but are of different sizes and spacings, unlike the illumination patterns Di. Specifically, the automotive lamp 10 tilts the projection optical axis Lp relative to the road surface 2 to vary the distances from the filter 13 and projection lens 14 to the road surface 2. Consequently, when projected onto the road surface 2 by the projection lens 14, each slit portion 27 (i.e., the illumination pattern Di resulting from the light transmitted through the slit portion 27) is sized and spaced to correspond to the distances. Therefore, the size and intervals of the slit portions 27 are set according to the distance to the road surface 2 so that the irradiation patterns Di on the road surface 2 have substantially the same size and substantially equal intervals.

[0044] Furthermore, each slit portion 27 is positioned so as to be rotationally symmetric about the projection optical axis Lp with respect to the positional relationship of each illumination pattern Di of the illumination pattern Pi. That is, in the vehicle lamp 10, since the projection lens 14 is reversed to project the filter 13 (illumination slit 26) onto the road surface 2, each slit portion 27 is positioned so as to illuminate each illumination pattern Di on the road surface 2. Therefore, in each slit portion 27, the first slit portion 271, which is located at the bottom in the vertical direction, is the farthest portion, corresponding to the first illumination pattern Di1 (the farthest portion) of the illumination pattern Pi. Furthermore, in each slit portion 27, the second slit portion 272, located above the first slit portion 271, corresponds to the second illumination pattern Di2, and the third slit portion 273, located at the top, is the closest portion, corresponding to the third illumination pattern Di3 (the closest portion). In the optical filter 13 of Example 1, the third slit portion 273 is positioned above the projection optical axis Lp in the vertical direction. A second slit portion 272 is provided below the third slit portion 273 so as to straddle a horizontal line including the projection optical axis Lp. Furthermore, a first slit portion 271 is provided below the second slit portion 272. Light transmitted through the optical filter 13 (the slit portions 27 of the illumination slit 26) is projected onto the road surface 2 via the projection lens 14.

[0045] like Figure 2As shown, the projection lens 14 has a lens body 28 that is a convex lens that is circular when viewed along the optical axis, and a flange portion 29 surrounding the periphery of the lens body 28. In Example 1, the incident surface and the exit surface of the lens body 28 are set as free curved surfaces that are convex, and are surfaces with gently changing curvatures without height differences (at least C2-order functions). The projection lens 14 has a lens axis extending along the optical axis. The lens axis is an optical axis that passes through the position of the maximum thickness in the optical axis direction in the lens body 28. The lens body 28 projects the irradiation slit 26 (each slit portion 27 thereof) of the filter 13, so that Figure 1 As shown in FIG, an irradiation pattern Pi is formed on the road surface 2 inclined with respect to the projection optical axis Lp. In addition, as long as the lens body 28 is a convex lens, the incident surface and the outgoing surface may be convex or concave, and are not limited to the structure of the first embodiment.

[0046] The flange portion 29 protrudes from the lens body 28 in radial directions centered on the lens axis and extends along the entire circumference of the lens axis. The flange portion 29 is configured to fit within the projection lens groove 15e of the housing 15. When the flange portion 29 of the projection lens 14 fits within the projection lens groove 15e, the lens axis coincides with the projection optical axis Lp.

[0047] Next, use Figures 6 to 14 The optical setting of the condenser lens 12 is described. Figure 8 、 Figures 11 to 14 In the figure, it is shown that the darker the color, the brighter it is, and the lighter the color, the darker it is.

[0048] First, basically, the condenser lens 12 converges the light from the first light source 21 and the second light source 22 to make the light fall within the setting range Sr (refer to FIG. Figure 5 ) including the light distribution (refer to Figure 14 In Example 1, the setting range Sr is defined as the range within which the irradiation slit 26 (its respective slit portions 27) in the filter 13 is provided. Furthermore, the setting range Sr may be configured to match the shape of the irradiation slit 26 and is not limited to the configuration of Example 1. Hereinafter, the direction perpendicular to the projection optical axis Lp is defined as the radial direction.

[0049] like Figure 6As shown, the incident surface 31 of the condenser lens 12 is configured to be line-symmetrical with respect to the lens axis Lr in a transverse cross-section including the optical axis direction and the width direction (parallel direction Dp), that is, to be plane-symmetrical with respect to a plane including the lens axis Lr and perpendicular to the width direction. The condenser lens 12 includes a first incident surface 34, a second incident surface 35, and an intermediate incident surface 36. The first incident surface 34 is optically configured with respect to the first light source 21, that is, with its first light-emitting surface 21a as a reference, and is positioned forward of the first light source 21 in the optical axis direction and outward of the width direction (opposite to the second light source 22). The second incident surface 35 is optically configured with respect to the second light source 22, that is, with its second light-emitting surface 22a as a reference, and is positioned forward of the second light source 22 in the optical axis direction and outward of the width direction (opposite to the first light source 21). The intermediate incident surface portion 36 is provided in front of the first light source 21 and the second light source 22, between the first incident surface portion 34 and the second incident surface portion 35, and is located on the lens axis Lr. In a transverse cross-section of the incident surface 31 of Example 1, the boundary between the first incident surface portion 34 and the intermediate incident surface portion 36 is provided along the first optical output axis Li1 of the first light source 21, and the boundary between the second incident surface portion 35 and the intermediate incident surface portion 36 is provided along the second optical output axis Li2 of the second light source 22.

[0050] In the longitudinal cross section of the condenser lens 12, which includes the optical axis direction and the vertical direction, the incident surface 31 is a curved surface that is convex toward the rear side in the optical axis direction, and the exit surface 32 is a curved surface that is convex toward the front side in the optical axis direction. At this time, the curvature of the incident surface 31 and the exit surface 32 in the longitudinal cross section of the condenser lens 12 is adjusted so as to obtain a desired light distribution in the vertical direction within the setting range Sr of the filter 13 (see Figure 13 In Example 1, the light distribution is set so that within the setting range Sr of the filter 13, the light is brightest near and below the projection optical axis Lp in the vertical direction, and gradually darkens as it moves away from the projection optical axis Lp. As a result, the light distribution on the filter 13 is vertically asymmetric with respect to a line extending in the width direction including the projection optical axis Lp in a longitudinal cross-section.

[0051] And, as Figure 6As shown, in the transverse cross-section of the incident surface 31 of the focusing lens 12, the first incident surface 34 and the second incident surface 35 are configured as curved surfaces convex to the rear side in the direction of the optical axis, and the intermediate incident surface 36 is configured as a plane parallel to the width direction (parallel direction Dp). That is, the intermediate incident surface 36 is configured to extend in the width direction like a cylindrical lens and to have a refractive power only in the vertical direction. The first incident surface 34 is optically set based on the light emitted from the center of the first light-emitting surface 21a of the first light source 21, and the second incident surface 35 is optically set based on the light emitted from the center of the second light-emitting surface 22a of the second light source 22. Therefore, in the incident surface 31, a sub-lens axis is set on the first output optical axis Li1 of the first light source 21, and a sub-lens axis is set on the second output optical axis Li2 of the second light source 22.

[0052] Furthermore, in the transverse cross-section of the condenser lens 12, the exit surface 32 is formed as a curved surface convex toward the front side in the optical axis direction. In the transverse cross-section, the half of the exit surface 32 that is closer to the first incident surface 34 in the width direction than the lens axis Lr is defined as the first exit surface 37, and the remaining half is defined as the second exit surface 38. Furthermore, in the condenser lens 12, the range in the width direction in which the intermediate incident surface 36 is provided is defined as the intermediate range Mr. That is, the intermediate range Mr is the range that is opposite to the intermediate incident surface 36 in the optical axis direction and is located forward of the intermediate incident surface 36 in the optical axis direction. Furthermore, in the transverse cross-section of the condenser lens 12, the curvatures of the first incident surface 34 and the second incident surface 35 relative to the exit surface 32 are set as follows.

[0053] like Figure 7 As shown, in a transverse cross-section, the condenser lens 12 controls the curvatures of the first incident surface portion 34 and the first exit surface portion 37, with the light L1 emitted from the first light source 21 and incident from the first incident surface portion 34 as the target. In the transverse cross-section, the condenser lens 12 causes the light L1 near the first exit optical axis Li1 to gradually diverge while traveling in a direction intersecting the projection optical axis Lp before reaching the filter 13. Furthermore, in the transverse cross-section, the condenser lens 12 causes the remaining light L1 to gradually diverge while traveling toward the projection optical axis Lp without intersecting the projection optical axis Lp before reaching the filter 13. In this case, the curvature of the first exit surface portion 37 is set together with the first incident surface portion 34 so that its apex is located in the middle range Mr.

[0054] The condenser lens 12 is set to the above optical setting to irradiate the light L1 on the filter 13, as shown in FIG. Figure 8Here, in the optical filter 13, the area on the side of the first incident surface portion 34 (first light source 21) relative to the projection optical axis Lp in the width direction is defined as the first light-shielding area As1, and the area on the opposite side, that is, on the side of the second incident surface portion 35 (second light source 22) in the width direction is defined as the second light-shielding area As2.

[0055] By irradiating the filter 13 with light L1, a high-intensity portion Ha1 (peak light intensity) with the highest light intensity is formed near the projection optical axis Lp, below the projection optical axis Lp. This high-intensity portion Ha1 is formed in a strip shape, spanning a vertical line passing through the projection optical axis Lp and extending in the width direction of both the first light-shielding area As1 and the second light-shielding area As2. Furthermore, by irradiating the filter 13 with light L1, a light distribution is formed, centered on the high-intensity portion Ha1, over a predetermined range in the upper, lower, and left and right directions within the set range Sr. In this light distribution, the brightness of the light L1 gradually changes, dimming as it moves away from the high-intensity portion Ha1, i.e., as it approaches the periphery of the set range Sr, thereby forming a single high-intensity portion Ha1. Furthermore, the light L1 illuminates the filter 13 within the set range Sr, extending from near the center toward the first light-shielding area As1, and does not illuminate the entire set range Sr.

[0056] In the transverse cross-section of the condenser lens 12, the curvatures of the second incident surface portion 35 and the second exit surface portion 38 are determined using the first incident surface portion 34 and the first exit surface portion 37, as described above. In the transverse cross-section, the condenser lens 12 is linearly symmetric about the lens axis Lr, that is, plane-symmetrical about a plane that includes the lens axis Lr and is orthogonal to the width direction. Furthermore, in the transverse cross-section, the condenser lens 12 is configured such that the second incident surface portion 35 is inverted by inverting the first incident surface portion 34 about the lens axis Lr, and the second exit surface portion 38 is inverted by inverting the first exit surface portion 37 about the lens axis Lr.

[0057] Here, the first incident surface portion 34 is set as described above so as to be a curved surface convex toward the first light source 21 side and has a vertex (a point closest to the first light source 21 side in the optical axis direction) before reaching the lens axis Lr in the width direction (see Figure 6 Therefore, in the transverse cross section of the incident surface 31, if the second incident surface 35 is set to be line-symmetrical with the first incident surface 34 and centered on the lens axis Lr, a concave portion (a concave portion curved toward the exit surface 32 in the optical axis direction) is formed near the lens axis Lr. This concave portion forms an unnecessarily bright area within the set range Sr (see FIG. Figure 11 the area surrounded by the dotted line).

[0058] Therefore, the condenser lens 12 of Example 1 is configured such that, in a transverse cross-section, the first and second incident surface portions 34 and 35 extend from their outer ends 34a and 35a in the width direction to the exit optical axes (Li1 and Li2) of the corresponding light sources (21 and 22), respectively, and are connected by a line parallel to the width direction to form an intermediate incident surface portion 36. Since the intermediate incident surface portion 36 connects the first and second incident surface portions 34 and 35, it is integrally formed with them in a longitudinal cross-section as a curved surface that is convex toward the rear side in the optical axis direction. The intermediate incident surface portion 36 may be positioned appropriately in the width direction in a transverse cross-section so as not to form a concave portion that would cause an unnecessarily brightened area when the first and second incident surface portions 34 and 35 are configured as described above, and is not limited to the configuration of Example 1.

[0059] Since the vertex of the first exit surface portion 37 is located in the middle range Mr, when the vertex is formed at a position exceeding the lens axis Lr in the width direction (the side where the second light source 22 is provided), the exit surface 32 has a single vertex by being formed as described above. In addition, when the vertex of the first exit surface portion 37 is formed at a position not exceeding the lens axis Lr in the width direction (the side where the first light source 21 is provided), the exit surface 32 has two vertices by being formed as described above. Moreover, in either case, the exit surface 32 is arranged to be linearly symmetrical with the lens axis Lr as the center in the transverse cross section, so that there is no height difference (C0-order function) between the first exit surface portion 37 and the second exit surface portion 38 on the lens axis Lr.

[0060] like Figure 9 As shown, the condenser lens 12 configured as described above directs, in a transverse cross-section, the light L2 emitted from the second light source 22 and incident from the first incident surface portion 34, which is located near the outer side in the width direction, toward the lens axis Lr. Furthermore, in the transverse cross-section, the condenser lens 12 directs the light L2, which is located near the lens axis Lr, toward a direction away from the lens axis Lr. That is, in the transverse cross-section, the condenser lens 12 changes the direction of the light L2 from a direction approaching the lens axis Lr to a direction away from the lens axis Lr as the incident position becomes closer to the inner side in the width direction of the first incident surface portion 34. Therefore, in the transverse cross-section, the condenser lens 12 causes the light L2 to gradually diverge at a position away from the lens axis Lr after intersecting its forward direction.

[0061] like Figure 10 As shown, the condenser lens 12 configured as described above causes the light L3 emitted from the second light source 22 and incident from the intermediate incident surface 36 to diverge gradually away from the lens axis Lr in the transverse cross section.

[0062] The condenser lens 12 is optically set as described above so that the light L2 and the light L3 from the second light source 22 after passing through the first incident surface portion 34 and the intermediate incident surface portion 36 are directed as follows. Figure 11 As shown, the filter 13 is irradiated with the light L2 and the light L3. By irradiating the filter 13 with the light L2 and the light L3, a high light intensity portion Ha2 (peak of light intensity) having the highest light intensity in the light distribution is formed near the projection light axis Lp below the projection light axis Lp. The high light intensity portion Ha2 is formed in the shape of a long strip extending in the width direction within the first light shielding area As1 and is provided in the same manner as the high light intensity portion Ha1 formed by the light L1 (see FIG. Figure 8 ) partially overlap and are arranged in the width direction. Furthermore, a light distribution is formed on the filter 13, centered on the high light intensity area Ha2, over a predetermined range in the upper, lower, left, and right directions on the side of the first light shielding area As1 within the set range Sr. This light distribution gradually changes in brightness as the light moves away from the high light intensity area Ha2, that is, as the light approaches the periphery of the set range Sr, thereby forming a single high light intensity area Ha2.

[0063] On the filter 13, the light L1 forms a light distribution (see Figure 8 ) and the light distribution formed by light L2 and light L3 (refer to Figure 11 ) overlap. Thus, on the filter 13, as Figure 12 As shown, the high-intensity area Ha1 overlaps with the high-intensity area Ha2, forming a high-intensity area Ha3 with the highest light intensity in the light distribution. This high-intensity area Ha3 is formed in an elongated shape. Specifically, it extends from a vertical line passing through the projection optical axis Lp below the projection optical axis Lp, partially within the second light-shielding area As2, and widthwise to the first light-shielding area As1. Furthermore, on the filter 13, a light distribution is formed with the high-intensity area Ha3 as the center, filling the first light-shielding area As1 side of the set range Sr and extending throughout the second light-shielding area As2 up to the vicinity of the projection optical axis Lp. This light distribution gradually changes in brightness as it moves away from the high-intensity area Ha3, that is, as it approaches the periphery of the set range Sr, resulting in a single high-intensity area Ha3.

[0064] Here, Figure 12 The light distribution on the filter 13 shown is formed by the light L1, light L2, and light L3 from the first light source 21 and the second light source 22 after passing through the first incident surface portion 34 and the intermediate incident surface portion 36. In addition, the condenser lens 12 is configured to be line-symmetrical with respect to the lens axis Lr in the transverse cross section. Therefore, the light distribution formed by the light from the first light source 21 and the second light source 22 after passing through the second incident surface portion 35 and the intermediate incident surface portion 36 is linearly symmetrical with respect to the lens axis Lr. Figure 12The projection optical axis Lp of the light distribution forms a linear symmetry.

[0065] Therefore, if the first light source 21 and the second light source 22 are turned on, Figure 12 The light distribution of the filter 13 is overlapped with the light distribution that is line-symmetrical with respect to the projection optical axis Lp. Figure 13 The light distribution shown is shown in FIG. By overlapping two pairs of high-light-intensity areas Ha3 on the filter 13, a long high-light-intensity region HA is formed in the width direction, near the projection optical axis Lp, below the projection optical axis Lp, straddling the projection optical axis Lp. The high-light-intensity region HA is the region with the highest light intensity (the region where the light intensity reaches a peak) in the light distribution, and is known as the hot zone. Light is irradiated onto the filter 13, centered on the high-light-intensity region HA, to fill the set range Sr. The brightness gradually changes, becoming darker as the filter moves away from the high-light-intensity region HA, i.e., as it approaches the periphery of the set range Sr. In this way, a light distribution is formed on the filter 13 with a single high-light-intensity region HA (peak light intensity) in the width direction (parallel direction Dp). At this time, the brightness distribution on the filter 13 is set to expand in the width direction. If the position in the vertical direction is the same, the brightness hardly changes even if the position in the width direction changes. That is, the condenser lens 12 diverges in the width direction so as not to cause a brightness difference compared to the vertical direction, and illuminates the set range Sr with the light from the first light source 21 and the second light source 22 .

[0066] Figure 14 Shows the Figure 13 The light distribution shown is formed across each slit portion 27 of the illumination slit 26 in the optical filter 13. In the optical filter 13, the high-light intensity area HA is configured to encompass substantially the entire area of ​​the first slit portion 271. This area is brightest (reaching the peak light intensity) and gradually darkens as the light moves away from the first slit portion 271. This illuminates the set range Sr in such a way that the brightness gradually changes vertically, with the first slit portion 271, the furthest portion, being brightest, and the third slit portion 273, the closest portion, being darkest. Within the set range Sr, the brightness of each slit portion 27, i.e., at each vertical position, is approximately uniform across the width of the filter 13. Consequently, the second slit portion 272 is darker than the first slit portion 271, and the third slit portion 273 is darker than the second slit portion 272. Furthermore, the brightness of each slit portion 27 is approximately uniform across the width of the filter 13.

[0067] Reference Figure 2The vehicle lamp 10 is assembled as follows. First, the first light source 21 and the second light source 22 are mounted on the substrate 23 to assemble the light source unit 11. This light source unit 11 is then fixed to the mounting portion 16a to form the mounting base 16. Next, in the lower portion 15a of the housing 15, the condenser lens 12 is inserted into the condenser lens groove 15c, the filter 13 is inserted into the filter hole 15d, and the projection lens 14 is inserted into the projection lens groove 15e. The rear end of the lower portion 15a of the housing 15 is then placed against the lower side of the front end 16d of the connecting wall 16c, and the upper portion 15b is engaged with the lower portion 15a from above. This allows the condenser lens 12, filter 13, and projection lens 14 to be housed in the housing 15, and the light source unit 11 is connected to the housing 15. Thus, the vehicle lamp 10 is assembled with the condenser lens 12 , the filter 13 , and the projection lens 14 arranged in a predetermined positional relationship in this order from the light source unit 11 on the projection optical axis Lp.

[0068] Next, the function of the vehicle lamp 10 will be described. The vehicle lamp 10 is provided in a lamp chamber (see FIG. 1 ) with the projection optical axis Lp directed obliquely forward of the outside of the vehicle 1 and tilted relative to the road surface 2 surrounding the vehicle 1. Figure 1 ). The vehicle lamp 10 can properly light up and extinguish the first light source 21 and the second light source 22 by supplying power from the lighting control circuit from the substrate 23. The light from the first light source 21 and the second light source 22 is converged by the focusing lens 12 and irradiates the filter 13. After passing through the irradiation slit 26 (each slit portion 27), it is projected by the projection lens 14, thereby forming an irradiation pattern Pi on the road surface 2. The irradiation pattern Pi is formed by arranging three irradiation patterns Di in a substantially straight line with substantially the same brightness by projecting the light that has passed through the irradiation slit 26 (each slit portion 27) of the filter 13 set to the above-mentioned light distribution through the projection lens 14. In particular, in the vehicle lamp 10 of Example 1, since the first light source 21 and the second light source 22 are set to monochromatic light, the influence of chromatic aberration in the projection lens 14 can be greatly suppressed, and the irradiation pattern Pi, i.e., each irradiation pattern Di, can be made clear.

[0069] If the vehicle lamp 10 is linked to the turn signal lamp and either the left or right turn signal lamp is turned on, the first light source 21 and the second light source 22 provided on the turned-on side are turned on, forming an illumination pattern Pi on the road surface 2. Figure 15 In the example shown, a vehicle 1 exiting a narrow alley with poor visibility is about to turn left. In the vehicle 1, the left turn signal is flashed, so that the vehicle lamp 10 provided on the left front forms an illumination pattern Pi on the road surface 2. Figure 15On the other hand, a person located on the front side can still observe the irradiation pattern Pi formed on the road surface 2 even if he cannot observe the vehicle 1 .

[0070] In particular, in each illumination pattern Di of the illumination pattern Pi formed by the vehicle lamp 10, both side ends Die are tilted inward relative to the arrow direction Da. Therefore, the vehicle lamp 10 can display each side end Die as a line that is significantly tilted toward the desired bending direction compared to the illumination pattern Pi (its arrow direction Da) formed toward the desired bending direction. Thus, for example, the vehicle lamp 10 can make the illumination pattern Pi formed on the left front appear to a person located on the left front side of the vehicle 1 as having the side end Die (its side end direction De) on the near side facing toward the person. Thus, the vehicle lamp 10 can make the person feel that the illumination pattern Pi not only simply indicates the arrow direction Da, but also has the intention of bending from the arrow direction Da toward the outer side, i.e., the direction in which the person is located.

[0071] Furthermore, in the vehicle 1, since the left and right vehicle lamps 10 are linked to the turn signals, when the hazard warning lights are on, the left and right vehicle lamps 10 simultaneously form an illumination pattern Pi on the road surface 2 (see FIG. Figure 1 Therefore, the vehicle lamp 10 can make people around the vehicle 1 more reliably recognize that the hazard lights are on, compared to a case where only the left and right turn signals are flashed.

[0072] The vehicle lamp 10 guides light from the first light source 21 and the second light source 22 to the filter 13, thereby ensuring sufficient brightness of the illumination pattern Pi formed by the illumination slit 26. Here, the first light source 21 and the second light source 22 generate heat independently, so arranging them at a distance allows for good heat dissipation.

[0073] Here, a vehicle lamp (hereinafter referred to as the comparative vehicle lamp) as a comparative example is described. Similar to the vehicle lamp 10, the comparative vehicle lamp is configured to converge the light from the light source onto the filter using a focusing lens and project it through a projection lens to form an illumination pattern. In the comparative vehicle lamp, if two light sources are arranged at a distance from each other, the peaks of the light amounts formed by the two light sources are formed separately on the filter. This causes the light spot in the illumination pattern formed, and when the two light sources are arranged at a distance larger than the size of the light-emitting surfaces of both sides, the light spot becomes significant and conspicuous. In other words, in the comparative vehicle lamp, if the two light sources are arranged at a distance larger than the size of the light-emitting surfaces, there is a tendency that the two light sources are difficult to be regarded as a single light source, and two peaks are formed on the filter, causing a light spot to appear in the illumination pattern.

[0074] To address this issue, in a condenser lens 12 of a vehicle lamp 10 that converges light emitted from two light sources (21, 22) separated by a distance d greater than a width w between two light-emitting surfaces (21a, 22a), a first entrance surface 34 and a second entrance surface 35 are provided on an entrance surface 31. The first entrance surface 34 is optically configured to target the first light source 21, while the second entrance surface 35 is optically configured to target the second light source 22. Furthermore, in the condenser lens 12, the exit surface 32 is optically configured, along with the first entrance surface 34 and the second entrance surface 35, so that the light from the first and second light sources 21, 22 incident through the first and second entrance surfaces 34, 35 forms a light distribution having a single high-intensity area HA (peak light intensity) in the parallel direction Dp (width direction) on the filter 13. Therefore, the vehicle lamp 10 can appropriately cool the two light sources ( 21 , 22 ) and form a bright illumination pattern Pi with suppressed light spots.

[0075] In particular, in the automotive lamp 10 of Example 1, the condenser lens 12 projects light from the first light source 21 after passing through the first incident surface portion 34 onto the filter 13, resulting in a light distribution having a high-intensity portion Ha1 within the second light-shielding area As2 near the projection optical axis Lp. Furthermore, in the automotive lamp 10, the condenser lens 12 projects light from the second light source 22 after passing through the second incident surface portion 35 onto the filter 13, resulting in a light distribution having a high-intensity portion (a portion that is an inversion of the high-intensity portion Ha1) within the first light-shielding area As1 near the projection optical axis Lp. Furthermore, in the automotive lamp 10, by arranging these two high-intensity portions without gaps in the parallel direction Dp, the condenser lens 12 forms a long high-intensity region HA in the width direction, extending across the projection optical axis Lp without interruption. In other words, the condenser lens 12 adjusts the position and shape of the high-intensity portion Ha1 in the light distribution formed by the light L1 from the first light source 21 after passing through the first incident surface portion 34, so that when the light distribution is reversed and superimposed, a single high-intensity area HA is formed. As a result, the automotive lamp 10 can form the high-intensity area HA across substantially the entire width of the first slit portion 271 extending along the filter 13. This ensures that the brightness of the first illumination pattern Di1 formed at the farthest point of the first slit portion 271 is substantially uniform.

[0076] In existing vehicle lamps described in prior art documents, multiple light guides are provided corresponding to multiple light sources. Even if these light guides are integrated, they are rod-shaped, corresponding to the light sources, and guide only the light from the corresponding light sources to the light shielding component. Therefore, existing vehicle lamps require multiple rod-shaped light guides to match the light sources, resulting in a complex structure. Furthermore, in existing vehicle lamps, since light from each light source corresponding to each light guide is guided to the light shielding component, it is guided to the light shielding component separately for each light source. Therefore, it is difficult to adjust existing vehicle lamps by optimizing the illumination pattern to form a light distribution with a single high-light intensity area (peak light intensity) on the light shielding component. For example, using the illumination pattern Pi of the present invention as an example, this optimization is to make the first slit portion 271 corresponding to the farthest first illumination pattern Di1 the brightest, and then dim the second slit portion 272 and the third slit portion 273 in that order, so that the light intensity within each slit portion 27 is roughly uniform. As described above, it is difficult to adjust the conventional vehicle lamp so that, in the illumination pattern Pi, the light intensity varies in the vertical direction in which the slits 27 are arranged and the light intensity is substantially uniform in the width direction perpendicular thereto.

[0077] To address this issue, the vehicle lamp 10 is provided with a single condenser lens 12 for guiding the light from each of the first and second light sources 21, 22 inward and causing it to exit from the same exit surface 32. This condenser lens 12 adjusts the light distribution on the filter 13 to the desired light distribution. Consequently, the vehicle lamp 10 can achieve sufficient brightness for the illumination pattern Pi formed, while also having a simpler structure than conventional vehicle lamps. Furthermore, the vehicle lamp 10 guides the light from the first and second light sources 21, 22 inward in the single condenser lens 12, causing them to exit from the same exit surface 32 and converge, thereby simultaneously guiding both lights to the filter 13. Consequently, compared to conventional vehicle lamps, the vehicle lamp 10 can more easily adjust a light distribution with a single high-intensity area HA (peak light intensity) on the filter 13.

[0078] The vehicle lamp 10 of the first embodiment can obtain the following effects.

[0079] A vehicle lamp 10 arranges two light sources (21, 22) in a parallel direction Dp, separated by a spacing d that is equal to or greater than the width w of the two light-emitting surfaces (21a, 22a). Furthermore, in the vehicle lamp 10, a condenser lens 12 converges the light from the two light sources (21, 22) to form a light distribution having a single high-intensity area HA in the parallel direction Dp on a light-shielding member (a filter 13 in Example 1). Therefore, the vehicle lamp 10 can appropriately cool the two light sources (21, 22) and form a light distribution having a single high-intensity area HA on the light-shielding member. Consequently, the vehicle lamp 10 can simplify the structure of the condenser lens 12 and form a bright illumination pattern Pi with reduced light spots.

[0080] Furthermore, in the automotive lamp 10, the condenser lens 12 projects light from the first light source 21 after passing through the first incident surface 34 onto the light shielding member, forming a high-intensity portion Ha1 of the light distribution distribution in the second light shielding area As2. Furthermore, in the automotive lamp 10, the condenser lens 12 projects light from the second light source 22 after passing through the second incident surface 35 onto the light shielding member (filter 13), forming a high-intensity portion of the light distribution distribution (a portion that is an inversion of the high-intensity portion Ha1) in the first light shielding area As1. Furthermore, in the automotive lamp 10, the condenser lens 12 forms the high-intensity area HA by arranging these two high-intensity portions without any gaps in the parallel direction Dp. Consequently, the automotive lamp 10 can achieve a light distribution distribution on the light shielding member that spans the projection optical axis Lp and has an elongated high-intensity portion HA in the width direction.

[0081] Furthermore, in the vehicle lamp 10, the incident surface 31 includes an intermediate incident surface portion 36 between the first incident surface portion 34 and the second incident surface portion 35 in the parallel direction Dp. This intermediate incident surface portion 36 is provided parallel to the parallel direction Dp. Therefore, the vehicle lamp 10 can suppress the formation of an unnecessarily brightened area on the light shielding member associated with the aforementioned configuration of the first incident surface portion 34 and the second incident surface portion 35.

[0082] In the vehicle lamp 10, the light exiting surface 32 of the condenser lens 12 has a vertex that is convex toward the light shielding member in the parallel direction Dp and within the intermediate range Mr where the intermediate incident surface portion 36 is provided. Therefore, the vehicle lamp 10 can easily shape the light exiting surface 32, including the periphery of the vertex.

[0083] Therefore, the vehicle lamp 10 as the first embodiment of the vehicle lamp of the present disclosure can simplify the structure and achieve a desired light distribution on the light shielding member (filter 13 ).

[0084] The vehicle lamp of the present disclosure has been described above based on the first embodiment. However, the specific structure is not limited to the first embodiment, and design changes and additions are permitted without departing from the gist of the invention of each claim.

[0085] Furthermore, in the first embodiment, the three illumination patterns Di are arranged at approximately equal intervals in a direction away from the vehicle 1 to form an illumination pattern Pi. However, if the illumination pattern is formed on the road surface 2 around the vehicle 1 and notifies people around the vehicle 1 of certain intentions of the driver, the pattern, the position of formation, etc. can be appropriately set and are not limited to the structure of the first embodiment. Furthermore, the vehicle lamp 10 is linked to the turn signal in the first embodiment, but can also be linked to other lamps such as the reverse lamp, and can also be operated independently, and is not limited to the structure of the first embodiment. Furthermore, the vehicle lamp can be provided on the vehicle 1 according to the position where the illumination pattern is formed relative to the vehicle 1, and can also be housed in the door mirror, or arranged in the lamp chamber of the tail lamp (the lamp chamber on the left and right sides of the rear of the vehicle), or provided on the vehicle body, and is not limited to the structure of the first embodiment.

[0086] Figure 16 Another example is shown in . Figure 16 The vehicle lamp 10A forms an illumination pattern PiA on the rear side of the vehicle 1 in the forward direction. The illumination pattern PiA is formed by arranging three illumination patterns Di identical to those of Example 1 in the forward direction of the vehicle 1. The vehicle lamp 10A is arranged in a lamp chamber at the rear of the vehicle, such as a high-mounted brake lamp, or at the rear of the vehicle body, facing the rear side of the forward direction of the vehicle 1. In the vehicle lamp 10A, the first light source 21 and the second light source 22 in the light source section 11 are configured to emit white light. If the vehicle lamp 10A is linked to the reversing lamp and the reversing lamp is turned on, an illumination pattern PiA is formed on the road surface 2 in a manner indicating the direction in which the vehicle 1 is reversing. The illumination pattern PiA can notify people around the rear of the vehicle 1 that the vehicle 1 is reversing, and can draw their attention. Moreover, since the vehicle lamp 10A forms the same white illumination pattern PiA as the linked reversing lamp, the discomfort caused by the linkage is suppressed. The vehicle lamp 10A only needs to form a white illumination pattern in conjunction with the backup lamp. For example, a rectangular illumination pattern or an illumination pattern of another shape may be formed, and the present invention is not limited to this other example.

[0087] In addition, in Example 1 (including the other example described above (the same shall apply hereinafter)), the brightness in the width direction of each slit portion 27 is made substantially uniform. However, the condenser lens 12 is not limited to the configuration of Example 1 as long as it has a light distribution distribution having a single high-intensity area (HA) in the parallel direction Dp of the two light sources (21, 22) on the light-shielding member (filter 13). In other words, the parallel direction Dp can be appropriately set according to the shape and form of the illumination pattern to be formed and is not limited to the configuration of Example 1.

[0088] In Example 1, a filter 13 is used as a light-shielding member that allows the light focused by the condenser lens 12 to pass through the illumination slit 26. However, the light-shielding member may be configured as long as it includes the illumination slit 26 that partially allows the light focused by the condenser lens 12 to pass through it. The light-shielding member may have other configurations and is not limited to the configuration of Example 1. For example, another configuration may be to provide an illumination slit that penetrates a plate-shaped member that does not allow light to pass through it, thereby forming a light-shielding plate that allows the light that has passed through the condenser lens 12 to pass through the illumination slit.

[0089] In Example 1, vehicle 1 driven by a driver is equipped with vehicle lamps 10 and 10A. However, the vehicle lamps can also be installed in vehicles with autonomous driving functions and are not limited to the configuration of Example 1. In this case, the vehicle lamps only need to form an illumination pattern at a timing corresponding to their intended use, that is, at a timing corresponding to a certain intention related to the operation of vehicle 1, and are not limited to the configuration of Example 1.

[0090] In Example 1, the light source unit 11 is provided on a mounting base 16 that functions as a heat sink (heat dissipation portion 16b), and the mounting base 16 is configured to be connected to the housing 15. However, any vehicle lamp may be provided as long as it uses a condenser lens to focus light from the light source onto a light-shielding member and projects the light using a projection lens to form an illumination pattern. The light source unit may be provided at an end of the housing or may have other structures, and is not limited to the structure of Example 1.

[0091] Explanation of symbols

[0092] 10, 10A—vehicle lamp, 12—condensing lens, 13—filter (as an example of a shading component), 14—projection lens, 21—first light source, 21a—first light-emitting surface (as an example of a light-emitting surface), 22—second light source, 22a—second light-emitting surface (as an example of a light-emitting surface), 26—irradiation slit, 31—incident surface, 32—exit surface, 34—first incident surface, 35—second incident surface, 36—intermediate incident surface, As1—first shading area, As2—second shading area, Dp—parallel direction, HA—high light intensity area, Ha—high light intensity part, Lr—lens axis, Pi, PiA—irradiation pattern.

Claims

1. A vehicle lamp comprising: A first light source and a second light source having light-emitting surfaces and arranged in a predetermined parallel direction; a single condenser lens for converging the light emitted from the first light source and the second light source; a light shielding member having an illumination slit for partially passing the light focused by the condenser lens; and a projection lens that projects the light that has passed through the light-shielding member to form an illumination pattern, The first light source and the second light source are arranged at a distance greater than the dimension of the light emitting surface in the parallel direction. The vehicle lamp is characterized in that: The condenser lens has an incident surface for inputting the light from the first light source and the second light source, and an exit surface for outputting the light from the first light source and the second light source. The incident surface includes a first incident surface portion located on the first light source side, a second incident surface portion located on the second light source side, and an intermediate incident surface portion located between the first incident surface portion and the second incident surface portion in the parallel direction. The first incident surface portion and the second incident surface portion are curved surfaces convex toward the rear side in the optical axis direction, and the intermediate incident surface portion is a plane parallel to the parallel direction. The emission surface has a vertex that is convex toward the light shielding member in the parallel direction and within the range where the intermediate incident surface portion is provided. The condenser lens projects the light from the first light source and the second light source onto the light shielding member via the incident surface and the emission surface, thereby forming a high light intensity area with the highest light intensity on the light shielding member, thereby forming a single light distribution in the parallel direction.

2. The vehicle lamp according to claim 1, wherein: In the light shielding member, in the parallel direction, the first incident surface portion side is set as a first light shielding area, and the second incident surface portion side is set as a second light shielding area. The above-mentioned focusing lens projects the light emitted from the above-mentioned first light source and incident from the above-mentioned first incident surface portion onto the above-mentioned shading component to form a high-light-intensity portion of the light distribution in the above-mentioned second shading area, and projects the light emitted from the above-mentioned second light source and incident from the above-mentioned second incident surface portion onto the above-mentioned shading component to form a high-light-intensity portion of the light distribution in the above-mentioned first shading area. The above-mentioned high-light-intensity area is formed by arranging the two high-light-intensity portions without a gap in the above-mentioned parallel direction.

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