Vehicle headlamp module and vehicle headlamp unit

Abstract

To provide a vehicular headlight module that can realize a reduction in size of a whole unit and a reduction in cost, and can appropriately form cutoff lines, and a vehicular headlight unit.SOLUTION: A light condensing headlight module 100 comprises: a light source part 110 for radiating light; a light condensing first lens 120 comprising a light incidence part 121 on which the light radiated from the light source part 110 is incident, a reflection surface 122 for reflecting the light incident from the light incidence part 121, and a light emitting part 123 for emitting the light reflected by the reflection surface 122; and a light condensing second lens 130 for projecting the light emitted from the light emitting part 123 of the light condensing first lens 120. An optical axis L1 of the light condensing second lens 130 passes through an edge part E1 in the reflection surface 122 of the light condensing first lens 120 on the side of the light incidence part 121.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to a vehicle headlamp module and a vehicle headlamp unit. [Background technology]

[0002] A known vehicle headlamp unit using an LED (Light Emitting Diode) as a light source includes an LED device, an attachment optical system, a projection optical system, and a member for forming a cutoff line (see, for example, Patent Document 1). The attachment optical system of the vehicle headlamp unit described in Patent Document 1 includes a light incident section facing the LED device, a reflective surface that reflects light incident from the light incident section, and a light exit section that exits the light reflected by the reflective surface. The member for forming the cutoff line is provided between the light exit section of the attachment optical system and the projection optical system. In the vehicle headlamp unit described in Patent Document 1 with this configuration, the main emission direction of light from the light exit section of the attachment optical system is oblique to the optical axis of the projection optical system, and the two intersect in the region of the front edge of the member for forming the cutoff line. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] German Patent Application Publication No. 102014205994 Summary of the Invention [Problem to be solved by the invention]

[0004] In the vehicle headlamp unit described in Patent Document 1, a member for forming a cutoff line is interposed between the attachment optical system and the projection optical system, which increases the size of the entire unit in the optical axis direction of the projection optical system and the number of parts, resulting in increased costs. On the other hand, if a member for forming a cutoff line is not provided in order to reduce the size of the entire unit, naturally no cutoff line will be formed.

[0005] In view of the above circumstances, an object of the present invention is to provide a vehicle headlamp module and a vehicle headlamp unit that can realize a reduction in size and cost of the entire unit and can appropriately form a cutoff line. [Means for solving the problem]

[0006] The vehicle headlamp module according to the present invention includes a first lens including a light source unit that emits light, a light entrance unit that receives the light emitted from the light source unit, a reflective surface that reflects the light that has entered from the light entrance unit, and a light exit unit that emits the light that has been reflected by the reflective surface; and a second lens that projects the light that has exited from the light exit unit of the first lens, wherein an optical axis of the second lens is aligned with a line on the reflective surface of the first lens. To form the low beam cutoff line The light passes through the edge on the light entrance side, and the light entrance has a truncated cone-shaped outer periphery whose diameter expands from the light source side to the reflecting surface side, and light emitted from the light source side is made incident from the inner periphery of the outer periphery. The vehicle headlamp module according to the present invention includes a first lens including a light source unit that emits light, a light entrance unit that receives the light emitted from the light source unit, a reflective surface that reflects the light that has entered from the light entrance unit, and a light exit unit that emits the light that has been reflected by the reflective surface; and a second lens that projects the light that has exited from the light exit unit of the first lens, wherein an optical axis of the second lens is aligned with a line on the reflective surface of the first lens. To form the low beam cutoff line The light passes through the edge portion on the light entrance portion side, and the light entrance portion is a collimator lens that converts the light emitted from the light source portion into parallel light and guides it to the reflecting surface side.

[0007] The vehicle headlight unit of the present invention is a vehicle headlight unit having a plurality of the vehicle headlight modules, wherein the plurality of vehicle headlight modules include a concentrating headlight module that projects a concentrating pattern from the second lens and a diffusing headlight module that projects a diffusing pattern from the second lens. The vehicle headlight unit according to the present invention is a vehicle headlight unit including a plurality of vehicle headlight modules, wherein the vehicle headlight module includes a first lens including a light source unit that emits light, a light entrance unit to which the light emitted from the light source unit is incident, a reflective surface that reflects the light incident from the light entrance unit, and a light exit unit that exits the light reflected by the reflective surface, and a second lens that projects the light exited from the light exit unit of the first lens, wherein the optical axis of the second lens passes through an edge of the reflective surface of the first lens on the light entrance unit side, and the plurality of vehicle headlight modules include a focusing headlight module that projects a focusing pattern from the second lens, and a diffusing headlight module that projects a diffusing pattern from the second lens. the optical axis of the second lens of the focusing headlight module and the optical axis of the second lens of the diffusing headlight module are arranged parallel to each other, the light source unit of the focusing headlight module and the light source unit of the diffusing headlight module are provided on a common substrate, the light source unit and the first lens of the focusing headlight module are arranged closer to the focusing headlight module and the second lens of the diffusing headlight module than the light source unit and the first lens of the diffusing headlight module, and the distance from the light entrance portion to the reflective surface of the first lens of the focusing headlight module is shorter than the distance from the light entrance portion to the reflective surface of the first lens of the diffusing headlight module. [Effects of the Invention]

[0008] According to the present invention, since a dedicated member for forming the cutoff line is not required, the distance between the first lens and the second lens can be narrowed, thereby making it possible to miniaturize the entire unit. Furthermore, the cost can be reduced by reducing the number of parts. In addition, the cutoff line can be appropriately formed by the edge of the reflecting surface of the first lens on the light entrance side. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a side view showing a vehicle headlamp unit according to one embodiment of the present invention. [Figure 2] FIG. 2 is a plan view showing the vehicle headlamp unit shown in FIG. [Figure 3] FIG. 3 is a rear view showing the vehicle headlamp unit shown in FIGS. 1 and 2 from the rear side in the vehicle longitudinal direction. [Figure 4] 4 is a rear view showing the first light-collecting lens of the vehicle headlamp unit shown in FIG. 3, viewed from the rear in the vehicle longitudinal direction. [Figure 5] FIG. 5 is a cross-sectional view taken along line VV of FIG. [Figure 6] FIG. 6 is a diagram showing a light distribution pattern formed in front of the vehicle by the vehicle headlamp unit shown in FIG. 1 and the like. DETAILED DESCRIPTION OF THE INVENTION

[0010] The present invention will be described below in accordance with preferred embodiments. Note that the present invention is not limited to the embodiments shown below and can be modified as appropriate without departing from the spirit of the present invention. In addition, in the embodiments shown below, some components are omitted from illustration and description, but for the details of the omitted technologies, publicly known or well-known technologies are applied as appropriate within the scope of the content described below.

[0011] 1 is a side view showing a vehicle headlight unit 10 according to one embodiment of the present invention. The vehicle headlight unit 10 shown in this figure projects a concentrated light pattern and a diffused light pattern ahead of the vehicle. The vehicle headlight unit 10 includes a concentrated headlight module 100 that forms the concentrated light pattern and a diffused light module 200 that forms the diffused light pattern.

[0012] The condensing headlight module 100 includes a plurality of light source units 110, a first condensing lens 120, and a second condensing lens 130. The diffusing headlight module 200 includes a plurality of light source units 210, a first diffusing lens 220, and a second diffusing lens 230. The light source units 110 and 210 are LEDs.

[0013] The plurality of light source units 110 of the light-collecting headlight module 100 and the plurality of light source units 210 of the light-diffusing headlight module 200 are mounted on a common flat substrate 12. This substrate 12 is fixed to a heat sink (not shown) and dissipates heat through the heat sink. The plurality of light source units 110 are arranged side by side in the vehicle width direction. The plurality of light source units 210 are also arranged side by side in the vehicle width direction. Here, the row of the plurality of light source units 110 and the row of the plurality of light source units 210 are arranged side by side in the vehicle longitudinal direction, and the row of the plurality of light source units 110 is arranged forward of the row of the plurality of light source units 210 in the vehicle longitudinal direction.

[0014] The second concentrating lens 130 and the second diffusing lens 230 are integrally formed. The second diffusing lens 230 is disposed on top of the second concentrating lens 130. The second concentrating lens 130 projects a concentrating pattern ahead of the vehicle, and the optical axis L1 of the second concentrating lens 130 extends in the longitudinal direction of the vehicle. The second diffusing lens 230 has a prism on at least one of its front and back surfaces and projects a diffusing pattern ahead of the vehicle, and the optical axis L2 of the second diffusing lens 230 extends in the longitudinal direction of the vehicle above the optical axis L1. In other words, the optical axis L1 of the second concentrating lens 130 and the optical axis L2 of the second diffusing lens 230 are disposed parallel to each other, or the optical axis L2 is disposed downward (at a depression angle) relative to the optical axis L1. Here, when the optical axis L2 is disposed downward relative to the optical axis L1, the light distribution of the diffusion headlight module 200 is not positioned above the light distribution of the light-collecting headlight module 100, which serves as the basis for optical axis adjustment. The optical axis L2 may also be disposed outward in the vehicle width direction relative to the optical axis L1. In this case, the light distribution of the diffusion headlight module 200 will illuminate a wider area.

[0015] The first collecting lens 120 is a light guide lens that collimates the light emitted from the plurality of light source units 110 and guides it to the second collecting lens 130, and is made of transparent resin. The first diffusing lens 220 is a light guide lens that collimates the light emitted from the plurality of light source units 210 and guides it to the second diffusing lens 230, and is made of transparent resin.

[0016] The first collecting lens 120 includes a plurality of light entrance portions 121, a reflecting surface 122, and a light exit portion 123. Each light entrance portion 121 is a collimating lens arranged facing a corresponding light source portion 110, and collimates the diffused light emitted from each light source portion 110. The reflecting surface 122 is arranged in the path of the light that is collimated by the plurality of light entrance portions 121 and travels, and reflects the light and changes its direction toward the second collecting lens 130. The light exit portion 123 is arranged in the path of the light that is reflected by the reflecting surface 122 and travels, and emits the light toward the second collecting lens 130.

[0017] The first diffusion lens 220 includes a plurality of light entrance portions 221, a reflecting surface 222, and a light exit portion 223. Each light entrance portion 221 is a collimating lens arranged facing each light source portion 210, and collimates the diffused light emitted from each light source portion 210. The reflecting surface 222 is arranged in the path of the light that is collimated by the plurality of light entrance portions 221 and travels, and reflects the light and changes its direction toward the second diffusion lens 230. The light exit portion 223 is arranged in the path of the light that is reflected by the reflecting surface 222 and travels, and emits the light toward the second diffusion lens 230.

[0018] The first concentrating lens 120 and the first diffusing lens 220 are arranged side by side in the vehicle longitudinal direction (a direction parallel to the optical axes L1 and L2), with the first concentrating lens 120 being arranged further forward in the vehicle longitudinal direction than the first diffusing lens 220. The first concentrating lens 120 and the first diffusing lens 220 extend from near one main surface of the substrate 12 (the upper surface in the figure) in a normal direction to the substrate 12. The direction in which the first concentrating lens 120 and the first diffusing lens 220 extend along the normal direction to the substrate 12 is referred to as the height direction of the first concentrating lens 120 and the first diffusing lens 220. The ends of the first concentrating lens 120 and the first diffusing lens 220 on the substrate 12 side (one end in the height direction) are referred to as the lower ends, and the ends opposite the lower ends (the other end in the height direction) are referred to as the upper ends.

[0019] In the first collecting lens 120, the light entrance portion 121 is disposed at the lower end of the first collecting lens 120, and the reflecting surface 122 is disposed above the light entrance portion 121. The reflecting surface 122 is disposed so as to intersect with the height direction of the first collecting lens 120 and the optical axis L1 of the second collecting lens 130 at an angle of about 40° to 50°. In addition, the light exit portion 123 is disposed between the reflecting surface 122 and the second collecting lens 130.

[0020] In the first diffusion lens 220, the light entrance portion 221 is disposed at the lower end of the first diffusion lens 220, and the reflecting surface 222 is disposed above the light entrance portion 221. The reflecting surface 222 is disposed so as to intersect with the height direction of the first diffusion lens 220 and the optical axis L2 of the second diffusion lens 230 at an angle of about 40° to 50°. In addition, the light exit portion 223 is disposed between the reflecting surface 222 and the second diffusion lens 230.

[0021] The height of the first concentrating lens 120 from the substrate 12 is lower than the height of the first diffusing lens 220 from the substrate 12. As a result, the reflecting surface 122 of the first concentrating lens 120 is disposed at a position lower than the reflecting surface 222 of the first diffusing lens 220, and the light exit portion 123 of the first concentrating lens 120 is disposed at a position lower than the light exit portion 223 of the first diffusing lens 220. Therefore, a distance D1 from the light entrance portion 121 to the reflecting surface 122 (edge ​​E1) of the first concentrating lens 120 is shorter than a distance D2 from the light entrance portion 221 to the reflecting surface 222 (edge ​​E2) of the first diffusing lens 220.

[0022] Fig. 2 is a plan view showing the vehicle headlamp unit 10 shown in Fig. 1. In Fig. 2, an edge E1 on the lower side (light entrance part 121 side) of the reflecting surface 122 of the first light-collecting lens 120 is indicated by a thick line, and an edge E2 on the lower side (light entrance part 221 side) of the reflecting surface 222 of the first diffusion lens 220 is indicated by a thick line.

[0023] 1 and 2, the optical axis L1 of the second concentrating lens 130 passes through the light exit portion 123 of the first concentrating lens 120 and reaches the reflecting surface 122. As shown in FIG. 2, the optical axis L1 passes through the center in the left-right direction of the reflecting surface 122. Here, as shown in FIG. 1, the optical axis L1 passes through the lower edge E1 of the reflecting surface 122.

[0024] Furthermore, the focal point F1 of the second collecting lens 130 is set to be located inside the first collecting lens 120. In particular, in this embodiment, the focal point F1 of the second collecting lens 130 is set to a position overlapping with the lower edge E1 of the reflecting surface 122 of the first collecting lens 120.

[0025] 1 and 2, the optical axis L2 of the second diffusion lens 230 passes through the light exit portion 223 of the first diffusion lens 220 and reaches the reflecting surface 222. As shown in Fig. 2, the optical axis L2 passes through the center in the left-right direction of the reflecting surface 222. Here, as shown in Fig. 1, the optical axis L2 passes through the lower edge E2 of the reflecting surface 222.

[0026] Furthermore, the focal point F2 of the second diffusion lens 230 is set to be located inside the first diffusion lens 220. In particular, in this embodiment, the focal point F2 of the second diffusion lens 230 is set to a position overlapping with the lower edge E2 of the reflecting surface 222 of the first diffusion lens 220.

[0027] 1, the reflecting surface 122 and the light exit portion 123 of the first concentrating lens 120 face the vehicle longitudinal direction (direction of the optical axis L1) to the second concentrating lens 130. Also, the reflecting surface 222 and the light exit portion 223 of the first diffusion lens 220 face the vehicle longitudinal direction (direction of the optical axis L2) to the second diffusion lens 230.

[0028] Fig. 3 is a rear view of the vehicle headlamp unit 10 shown in Figs. 1 and 2, viewed from the rear in the vehicle longitudinal direction. Fig. 4 is a rear view of the first light-collecting lens 120 of the vehicle headlamp unit 10 shown in Fig. 3, viewed from the rear in the vehicle longitudinal direction. In Fig. 3, the lower edge E1 of the reflecting surface 122 of the first light-collecting lens 120 is indicated by a thick dashed line, and the lower edge E2 of the reflecting surface 222 of the first diffusion lens 220 is indicated by a thick solid line. In Fig. 4, the lower edge E1 of the reflecting surface 122 of the first light-collecting lens 120 is indicated by a thick solid line. Note that the substrate 12 is not shown in Figs. 3 and 4.

[0029] 3 and 4, the focal point F1 of the second concentrating lens 130 is set at the center in the left-right direction of the lower edge E1 of the reflecting surface 122 of the first concentrating lens 120. In addition, the focal point F2 of the second diffusion lens 230 is set at the center in the left-right direction of the lower edge E2 of the reflecting surface 222 of the first diffusion lens 220.

[0030] Fig. 5 is a VV cross-sectional view of Fig. 3. As shown in Fig. 4 and Fig. 5, each light entrance portion 121 of first collecting lens 120 has outer peripheral portion 121A in the shape of an inverted truncated cone whose diameter increases from the bottom side to the top side, and recessed portion 121B in the shape of a truncated cone whose diameter decreases from the bottom side to the top side. As shown in Fig. 5, diffused light emitted from light source unit 110 enters first collecting lens 120 from recessed portion 121B and is guided as parallel light to reflecting surface 122 on the top side of first collecting lens 120.

[0031] 5, each light entrance section 221 of the first diffusion lens 220 includes an outer peripheral section 221A in the shape of an inverted truncated cone whose diameter increases from the bottom end to the top end, and a recessed section 221B in the shape of a truncated cone whose diameter decreases from the bottom end to the top end, similar to the light entrance section 121. The diffused light emitted from the light source section 210 enters the first diffusion lens 220 through the recessed section 221B and is guided as parallel light to the reflecting surface 222 on the top end side of the first diffusion lens 220.

[0032] Fig. 6 is a diagram showing a light distribution pattern formed in front of the vehicle by the vehicle headlamp unit 10 shown in Fig. 1 etc. Fig. 6 schematically shows the distribution of illuminance on a virtual plane (vertical screen) perpendicular to the optical axis L1 of the second concentrating lens 130 and the optical axis L2 of the second diffusing lens 230 in front of the vehicle. Fig. 6 also shows a vertical reference line V and a horizontal reference line H on the vertical screen.

[0033] 6, the vehicle headlight unit 10 forms a light distribution pattern in which a concentrating pattern CP having a relatively high light intensity and a diffusing pattern DP having a relatively low light intensity are superimposed on each other. Specifically, the concentrating headlight module 100 irradiates the concentrating pattern CP toward the center of the light distribution pattern, and the diffusing headlight module 200 irradiates the diffusing pattern DP so that it spreads out to both the left and right sides and downward from the concentrating pattern CP.

[0034] The light-collecting pattern CP has a cutoff line CL1 located above the horizontal reference line H on the own lane side (left side in the figure) of the intersection point (elbow point) between the vertical reference line V and the horizontal reference line H, and a cutoff line CL2 located below the horizontal reference line H on the oncoming lane side of the elbow point. Here, the optical axis L1 of the second collecting lens 130 is set to pass through the lower edge E1 of the reflecting surface 122 of the first collecting lens 120, so that light irradiating the lower edge E1 of the reflecting surface 122 forms the cutoff lines CL1 and CL2. In particular, the focus F1 of the second collecting lens 130 is set at the lower edge E1 of the reflecting surface 122 of the first collecting lens 120, so that light irradiating the lower edge E1 of the reflecting surface 122 clearly forms the cutoff lines CL1 and CL2.

[0035] The diffusion pattern DP has cutoff lines CL3 located below the horizontal reference line H on both sides of the vertical reference line V. Here, the optical axis L2 of the second diffusion lens 230 is set to pass through the lower edge E2 of the reflecting surface 222 of the first diffusion lens 220, so that light irradiating the lower edge E2 of the reflecting surface 222 forms the cutoff line CL3. In particular, the focal point F2 of the second diffusion lens 230 is set at the lower edge E2 of the reflecting surface 222 of the first diffusion lens 220, so that light irradiating the lower edge E2 of the reflecting surface 222 clearly forms the cutoff line CL3.

[0036] As described above, in the concentrating headlight module 100 of this embodiment, in the first concentrating lens 120, the light incident portion 121 receives and collimates the light emitted from the light source portion 110, the reflective surface 122 reflects and changes the direction of the light collimated by the light incident portion 121 and traveling, and the light exiting portion 123 exits the light reflected by the reflective surface 122. The light exiting the light exiting portion 123 is then projected by the second concentrating lens 130.

[0037] Here, the optical axis L1 of the second collecting lens 130 passes through an edge E1 on the light entrance portion 121 side of the reflecting surface 122 of the first collecting lens 120. As a result, light irradiating the edge E1 of the reflecting surface 122 forms cutoff lines CL1 and CL2 of the light collection pattern CP. Therefore, a dedicated member for forming the cutoff lines CL1 and CL2 of the light collection pattern CP is not required, and the distance between the first collecting lens 120 and the second collecting lens 130 can be narrowed, thereby reducing the size of the collecting headlight module 100. Furthermore, the reduction in the number of parts reduces the cost of the collecting headlight module 100. In addition, the cutoff lines CL1 and CL2 of the light collection pattern CP can be appropriately formed by the edge E1 on the light entrance portion 121 side of the reflecting surface 122 of the first collecting lens 120.

[0038] In particular, in the concentrating headlamp module 100 of this embodiment, the focus F1 of the second concentrating lens 130 is set at the lower edge E1 of the reflecting surface 122 of the first concentrating lens 120, thereby enabling the cutoff lines CL1 and CL2 to be clearly formed.

[0039] Similarly, in the diffusion headlight module 200 of this embodiment, the optical axis L2 of the second diffusion lens 230 passes through the edge E2 of the reflecting surface 222 of the first diffusion lens 220, which is on the light incident portion 221 side. As a result, light irradiating the edge E2 of the reflecting surface 222 forms the cutoff line CL3 of the diffusion pattern DP. Therefore, a dedicated member for forming the cutoff line CL3 of the diffusion pattern DP is not required, and the distance between the first diffusion lens 220 and the second diffusion lens 230 can be narrowed, thereby reducing the size of the diffusion headlight module 200. Furthermore, the reduction in the number of parts reduces the cost of the diffusion headlight module 200. In addition, the cutoff line CL3 of the diffusion pattern DP can be appropriately formed by the edge E2 of the reflecting surface 222 of the first diffusion lens 220, which is on the light incident portion 221 side.

[0040] In particular, in the diffusion headlight module 200 of this embodiment, the focus F2 of the second diffusion lens 230 is set at the edge E2 on the light entrance portion 221 side of the reflective surface 222 of the first diffusion lens 220, thereby enabling the cutoff line CL3 to be clearly formed.

[0041] The vehicle headlamp unit 10 of this embodiment includes a condensing headlamp module 100 and a diffusion headlamp module 200, and the optical axis L1 of the condensing second lens 130 of the condensing headlamp module 100 and the optical axis L2 of the diffusion second lens 230 of the diffusion headlamp module 200 are arranged parallel to each other. This forms a light distribution pattern in which a condensing pattern CP with a relatively high light intensity and a diffusion pattern DP with a relatively low light intensity are superimposed on each other. In particular, because the optical axis L1 and the optical axis L2 are arranged parallel to each other, the cutoff lines CL1 and CL2 of the condensing pattern CP can be aligned with the cutoff line CL3 of the diffusion pattern DP, thereby brightening the areas near the cutoff lines CL1, CL2, and CL3.

[0042] Furthermore, the light source unit 110 of the light-collecting headlight module 100 and the light source unit 210 of the light-diffusing headlight module 200 are provided on a common flat substrate 12. This reduces the number of components on the substrate 12 and simplifies the configuration of the substrate 12.

[0043] That is, the vehicle headlamp unit 10 of this embodiment has a configuration in which the optical axis L1 and the optical axis L2 are arranged parallel to each other, and the light source units 110 and 210 are mounted on a common flat substrate 12. In the vehicle headlamp unit 10 having such a configuration, the light source unit 110 and the first condensing lens 120 are provided closer to the second condensing lens 130 and the second diffusing lens 230 than the light source unit 210 and the first diffusing lens 220. A distance D1 from the light entrance portion 121 to the reflecting surface 122 of the first condensing lens 120 is shorter than a distance D2 from the light entrance portion 221 to the reflecting surface 222 of the first diffusing lens 220. This makes it possible to align the optical axis L1 of the second concentrating lens 130 with the edge E1 of the reflecting surface 122 by making the reflecting surface 122 and the light exit portion 123 of the second concentrating lens 130 and the first concentrating lens 120 face each other in the direction of the optical axis L1. Also, it makes it possible to align the optical axis L2 of the second diffusion lens 230 with the edge E2 of the reflecting surface 222 by making the reflecting surface 222 and the light exit portion 223 of the second diffusion lens 220 face each other in the direction of the optical axis L2.

[0044] Incidentally, light entrance portion 121 of first collecting lens 120 collimates the diffused light emitted by light source portion 110, and the collimated light travels toward reflecting surface 122 at a diffusion angle. Similarly, light entrance portion 221 of first diffusing lens 220 collimates the diffused light emitted by light source portion 210, and the collimated light travels toward reflecting surface 222 at a diffusion angle. Here, the longer the distance D1 from light entrance portion 121 to reflecting surface 122 in first collecting lens 120, the greater the diffusion of light traveling from light entrance portion 121 toward reflecting surface 122 at a diffusion angle, and the light collecting characteristics deteriorate.

[0045] Therefore, in the vehicle headlamp unit 10 of this embodiment, the distance D1 from the light entrance portion 121 to the reflecting surface 122 in the first collecting lens 120 is set to be shorter than the distance D2 from the light entrance portion 221 to the reflecting surface 222 in the first diffusing lens 220. This makes it possible to suppress the diffusion of light from the light entrance portion 121 to the reflecting surface 122 in the first collecting lens 120, and improve the light collecting characteristics, compared to when the relationship between the distances D1 and D2 is reversed or when the distances D1 and D2 are equal.

[0046] Furthermore, in the vehicle headlamp unit 10 of this embodiment, the first light-collecting lens 120 and the first diffusion lens 220 are formed from a transparent resin material, which makes it possible to suppress heat absorption by the first light-collecting lens 120 and the first diffusion lens 220. This makes it possible to improve heat resistance to sunlight that is focused through the second light-collecting lens 130 and the second diffusion lens 230.

[0047] The present invention has been described above based on the embodiments, but the present invention is not limited to the above-described embodiments, and modifications may be made without departing from the spirit of the present invention, and techniques from the embodiments or well-known or publicly known techniques may be combined.

[0048] For example, in the above-described embodiment, the second collecting lens 130 and the second diffusing lens 230 are integrally formed, but they may be formed separately. Furthermore, the light source unit 110 of the collecting headlight module 100 and the light source unit 210 of the diffusing headlight module 200 are mounted on a common, flat substrate 12. However, the light source units 110 and 210 may be mounted on separate substrates, and the substrates do not have to be flat. If the light source units 110 and 210 are mounted on separate substrates or the substrates are configured in a stepped shape, it is not essential to set the distance D1 from the light entrance portion 121 to the reflecting surface 122 of the first collecting lens 120 to be shorter than the distance D2 from the light entrance portion 221 to the reflecting surface 222 of the first diffusing lens 220. In this case, it is also possible to set the distances D1 and D2 to be equal or to set the distance D2 to be longer than the distance D1.

[0049] In the above-described embodiment, the focal point F1 of the second collecting lens 130 is set to coincide with the inside of the first collecting lens 120 and the edge E1 of the reflecting surface 122 on the light entrance portion 121 side, but this is not essential, and the focal point F1 may be set to be shifted forward or rearward in the vehicle longitudinal direction from the edge E1. Similarly, it is not essential to set the focal point F2 of the second diffusing lens 230 to coincide with the inside of the first diffusing lens 220 and the edge E2 of the reflecting surface 222 on the light entrance portion 221 side, and the focal point F2 may be set to be shifted forward or rearward in the vehicle longitudinal direction from the edge E2. In addition, the reflecting surfaces 122, 222 may be vapor-deposited on the first collecting lens 120 or the first diffusing lens 220.

[0050] Furthermore, in the above-described embodiment, the light source units 110, 210 are provided facing upward, but the light source units 110, 210 may be provided facing sideways. In this case, the optical axis L1 and focal point F1 of the second concentrating lens 130 may be set to coincide with the right or left end of the reflecting surface 122 of the first concentrating lens 120. Furthermore, the optical axis L2 and focal point F2 of the second diffusing lens 230 may be set to coincide with the right or left end of the reflecting surface 222 of the first diffusing lens 220.

[0051] Furthermore, in the above-described embodiment, the present invention has been described using as examples the light-concentrating headlight module 100 and the light-diffusing headlight module 200 in which the light source units 110, 210 are LEDs, but the light source units 110, 210 may be replaced with other light sources such as organic EL. [Explanation of symbols]

[0052] 10: Vehicle headlamp unit 12: Circuit board 100: Light-concentrating headlamp module (vehicle headlamp module) 110: Light source section 120: First focusing lens (first lens) 121: Light receiving part 122: Reflective surface 123: Idemitsu department 130: Second lens for focusing (second lens) 200: Diffused headlamp module (vehicle headlamp module) 210: Light source section 220: Diffusion lens No. 1 (No. 1 lens) 221: Light receiving part 222: Reflective surface 223: Idemitsu Department 230: Second lens for diffusion (second lens) CP: Light collection pattern DP: Diffusion Pattern D1: Distance D2 :Distance E1:Edge E2 :Edge F1: Focus F2: Focus L1: Optical axis L2: Optical axis

Claims

1. a light source unit that emits light; a first lens including a light entrance portion to which light emitted from the light source portion is incident, a reflecting surface to reflect the light incident from the light entrance portion, and a light exit portion to emit the light reflected by the reflecting surface; a second lens that projects the light emitted from the light exit portion of the first lens; Equipped with an optical axis of the second lens passes through an edge portion on the light incident portion side of the reflecting surface of the first lens for forming a cutoff line of a low beam; The light entrance portion has a truncated cone-shaped outer peripheral portion whose diameter expands from the light source portion side to the reflecting surface side, and the light emitted from the light source portion is incident on the inner peripheral side of the outer peripheral portion.

2. 2. The vehicle headlamp module according to claim 1, wherein the light entrance portion is a collimator lens that converts the light emitted from the light source portion into parallel light and guides it toward the reflecting surface.

3. a light source unit that emits light; a first lens including a light entrance portion to which light emitted from the light source portion is incident, a reflecting surface to reflect the light incident from the light entrance portion, and a light exit portion to emit the light reflected by the reflecting surface; a second lens that projects the light emitted from the light exit portion of the first lens; Equipped with an optical axis of the second lens passes through an edge portion on the light incident portion side of the reflecting surface of the first lens for forming a cutoff line of a low beam; The light incident portion is a collimating lens that converts the light emitted from the light source portion into parallel light and guides it toward the reflecting surface.

4. 3. The vehicle headlamp module according to claim 1, wherein a focal point of the second lens on the first lens side is located at an edge of the reflecting surface of the first lens on the light incident side.

5. A vehicle headlamp unit including a plurality of vehicle headlamp modules according to claim 1 or 2, The plurality of vehicle headlamp modules include: a focusing headlamp module that projects a focusing pattern from the second lens; a diffusion headlamp module that projects a diffusion pattern from the second lens; A vehicle headlamp unit comprising:

6. A vehicle headlamp unit including a plurality of vehicle headlamp modules, The vehicle headlamp module includes: a light source unit that emits light; a first lens including a light entrance portion to which light emitted from the light source portion is incident, a reflecting surface to reflect the light incident from the light entrance portion, and a light exit portion to emit the light reflected by the reflecting surface; a second lens that projects the light emitted from the light exit portion of the first lens; Equipped with an optical axis of the second lens passes through an edge portion of the reflecting surface of the first lens on the light incident portion side; The plurality of vehicle headlamp modules include: a focusing headlamp module that projects a focusing pattern from the second lens; a diffusion headlamp module that projects a diffusion pattern from the second lens; Equipped with the optical axis of the second lens of the light-collecting headlight module and the optical axis of the second lens of the light-diffusing headlight module are arranged parallel to each other; the light source unit of the light-collecting headlamp module and the light source unit of the light-diffusing headlamp module are provided on a common substrate, the light source unit and the first lens of the light-collecting headlight module are disposed closer to the second lens of the light-collecting headlight module and the second lens of the light-diffusing headlight module than the light source unit and the first lens of the light-diffusing headlight module, A vehicle headlight unit in which the distance from the light entrance portion to the reflecting surface in the first lens of the focusing headlight module is shorter than the distance from the light entrance portion to the reflecting surface in the first lens of the diffusing headlight module.

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