Vehicular light emitting unit and vehicular lighting fixture

Abstract

To provide a vehicular light emitting unit capable of preventing internal components from becoming visible without providing a shielding component, and to provide a vehicular lighting fixture.SOLUTION: A vehicular light emitting unit 40 includes: a light source part 50; a light conversion panel 60 arranged having an interval with the light source part 50, and for converting excitation light into secondary light and emitting the secondary light; a light guide member 70 arranged across the light source part 50 and the light conversion panel 60 and for guiding the excitation light from the light source part 50 to the light conversion panel 60 side; and an outer lens 30 for transmitting the secondary light from the light conversion panel 60 and emitting it to the outside. The outer lens 30 is formed of a red transparent member, and the light guide member 70 is formed of a blue transparent member. When viewed from the outside of a vehicle, at least one of the light conversion panel 60 and the light guide member 70 exists closer to the side where the secondary light is emitted from the outer lens 30 than the light source part 50.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a vehicle lighting unit and a vehicle lamp.

Background Art

[0002] As vehicle lighting units and vehicle lamps that utilize secondary light (luminescence) excited by excitation light, for example, there is one disclosed in Patent Document 1.

[0003] The vehicle lamp of this Patent Document 1 includes an excitation light source and a light conversion member. The excitation light (for example, blue light) emitted from the excitation light source is irradiated onto the light conversion member, and the light conversion member converts the excitation light into secondary light (for example, red light) and emits the secondary light. The vehicle lamp of Patent Document 1 is, for example, a tail lamp, and the secondary light is emitted to the outside of the vehicle as, for example, a light distribution pattern of the tail lamp.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] By the way, in a vehicle lamp such as that of Patent Document 1, the excitation light emitted from the excitation light source is directly irradiated onto the light conversion member. For this reason, due to the relative positional relationship between the excitation light source and the light conversion member, only a part of the excitation light from the excitation light source is irradiated onto the light conversion member, and the excitation light from the excitation light source is not efficiently utilized.

[0006] Therefore, development is underway for a vehicle lamp that can efficiently utilize excitation light and, moreover, can narrow (reduce) the range to be covered and improve the degree of freedom in the design of the light conversion panel.

[0007] Here, in such a vehicle lamp, for example, there is a risk that internal components such as a light guide member and a substrate may be visually recognized through the lens of a red tail lamp. In that case, in order to prevent a deterioration in appearance due to the visual recognition of such internal components, it has been considered to separately provide a shielding component and hide the above-mentioned internal components with the shielding component.

[0008] However, when providing such a shielding component, it leads to an increase in the number of components and man-hours, which is a factor in cost increase.

[0009] The present invention has been made in view of the above circumstances, and an object thereof is to provide a vehicle light-emitting unit and a vehicle lamp capable of preventing internal components from being visually recognized without providing a shielding component.

Means for Solving the Problems

[0010] In order to solve the above problems, according to a first aspect of the present invention, there is provided a vehicle light-emitting unit attached to a vehicle, including a light source unit that emits excitation light, a light conversion panel that is disposed with a space from the light source unit and converts the excitation light into secondary light including a red wavelength region and emits the secondary light, a light guide member that is disposed across between the light source unit and the light conversion panel and guides the excitation light from the light source unit toward the light conversion panel side, and an outer lens that transmits the secondary light from the light conversion panel and emits it to the outside. The outer lens is formed of a red transparent member, the light guide member is formed of a blue transparent member, and when viewed from the outside of the vehicle, at least one of the light conversion panel or the light guide member exists on the side where the secondary light is emitted from the outer lens rather than the light source unit. A vehicle light-emitting unit is provided, which is characterized by the above.

[0011] In the above-described invention, the light guide member is disposed at a portion facing the light source unit and the light conversion panel, and includes a first portion for allowing excitation light from the light source unit to enter, a second portion that extends from the first portion in a direction away from the light source axis, which is the central direction of the excitation light emitted from the light source unit, to a portion that does not interfere with the light conversion panel while guiding and reflecting the excitation light from the first portion, and a third portion that extends from the second portion to a portion for emitting light to the light conversion panel and emits the reflected light from the second portion toward the light conversion panel. This is preferable.

[0012] In the above-described invention, the first portion has an incident surface for allowing excitation light from the light source unit to enter and a composite primary reflection surface for reflecting the excitation light from the incident surface in one direction to the second portion. The second portion has a third reflection surface for reflecting the reflected light from the composite primary reflection surface. The third portion has a fourth reflection surface for reflecting the reflected light reflected by the third reflection surface and an emission surface for emitting the excitation light from the fourth reflection surface to the light conversion panel. This is preferable.

[0013] In the above-described invention, the light conversion panel has a light emission surface of a light conversion layer that emits light by excitation light and emits secondary light. The fourth reflection surface is divided into a plurality of parts vertically and horizontally, and the range irradiated with the excitation light reflected by the plurality of fourth reflection surfaces and emitted from the emission surface is similar to the range of the light emission surface of the light conversion panel in a plan view. This is preferable.

[0014] According to a second aspect of the present invention, there are provided a lamp housing and a lamp lens that form a lamp space, and the vehicle light-emitting unit according to each of the above inventions disposed in the lamp space. A vehicle lamp characterized by comprising the above is provided.

Advantages of the Invention

[0015] According to the present invention, it is possible to provide a vehicle light-emitting unit and a vehicle lamp that can prevent internal components from being visually recognized without providing a shielding component.

Brief Description of the Drawings

[0016]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Mode for Carrying Out the Invention

[0017] Hereinafter, a vehicle light emitting unit and a vehicle lamp according to an embodiment of the present invention will be described with reference to the drawings. Note that the present invention is not limited by this embodiment. Further, the components in the following embodiments include those that can be replaced by those skilled in the art and are easy to replace, or those that are substantially the same.

[0018] Also, in this specification, front, rear, top, bottom, left, and right are the front, rear, top, bottom, left, and right in the vehicle-mounted state where the vehicle light emitting unit and the vehicle lamp according to this embodiment are mounted on the vehicle.

[0019] Also, each of the above front-rear, up-down, and left-right directions is the direction in the vehicle-mounted state where the vehicle light emitting unit and the vehicle lamp are mounted on the vehicle, and indicates the direction when viewed from the driver's seat in the traveling direction of the vehicle. The front-rear direction is the traveling direction of the vehicle (forward direction and backward direction), the up-down direction is parallel to the vertical direction, and the left-right direction is the horizontal direction. In the front direction and the rear direction, the direction in which light is emitted from the vehicle light emitting unit and the vehicle lamp is defined as the front direction, and the opposite direction of the front direction is defined as the rear direction.

[0020] The drawings are schematic diagrams showing the vehicle light-emitting unit and the vehicle lamp according to the present embodiment. Therefore, although the main components of the vehicle light-emitting unit and the vehicle lamp according to the present embodiment are illustrated, illustration of components other than the main components is omitted, and a part of the hatching of the main components is omitted. Further, in FIGS. 1 to 5, the symbol “F” indicates “front”, “B” indicates “rear”, “U” indicates “up”, “D” indicates “down”, “L” indicates “left”, and “R” indicates “right”.

[0021] (Regarding the configuration of the vehicle light-emitting unit 40 and the vehicle lamp 10) Hereinafter, the configuration of the vehicle light-emitting unit and the vehicle lamp according to the present embodiment will be described.

[0022] (Regarding the configuration of the vehicle lamp 10) FIG. 1 is an exploded perspective view showing a schematic configuration of the vehicle lamp 10. Further, FIG. 2 is a longitudinal sectional view showing a schematic configuration of the vehicle lamp 10. The vehicle lamp 10 shown in FIGS. 1 and 2 is, for example, a rear combination lamp, and is attached to both the left and right sides of the rear part of a vehicle (not shown), and emits light rearward of the vehicle. Therefore, in the present embodiment, the front direction is the rear direction, and the rear direction is the front direction.

[0023] As shown in FIGS. 1 and 2, the vehicle lamp 10 mainly includes an outer housing (lamp housing) 20, an outer lens (lamp lens) 30, and a vehicle light-emitting unit 40.

[0024] The outer housing 20 is formed of a light-impermeable member such as a resin member, for example. In the present embodiment, the outer housing 20 is provided with an opening that opens on one side, and the outer lens 30 is attached to the opening. Note that the outer housing 20 is provided in black in the present embodiment. However, the outer housing 20 may be provided in a color other than black (for example, silver).

[0025] Further, the outer lens 30 is formed of a light-transmissive member such as a red transparent resin as the material. Note that, as the material of the outer lens 30, resin members such as PMMA (Polymethyl methacrylate) and PC (Polycarbonate) are preferable, but other light-transmissive members may also be used as the material. The outer housing 20 and the outer lens 30 are fixed to each other, and by this fixing, a lamp space SP1 is formed inside the vehicle lamp 10.

[0026] Here, when the outer lens 30 is irradiated with visible light, the outer lens 30 is configured to transmit only light in the red wavelength region and not transmit light in other wavelength regions. Here, the light in the red wavelength region is light having a wavelength of about 620 to 780 nm, but light in a wavelength region slightly deviated from such a wavelength region may also be used.

[0027] Therefore, when the outer lens 30 is irradiated with light in the blue wavelength region, for example, the blue light is absorbed by the outer lens 30 and cannot be transmitted. Further, when a blue internal component is visually recognized from the outside of the outer lens 30, it appears black because the light in the blue wavelength region is absorbed.

[0028] In the configuration shown in FIG. 1, the outer lens 30 is rectangular for showing the inventive concept, but in actuality, the outer lens 30 is formed in an appropriate shape that matches the design of the vehicle.

[0029] The vehicle light-emitting unit 40 further includes a light source unit 50, a light conversion panel 60, and a light guide member 70. Among these, the light source unit 50 has a light source 51 and a substrate 52. As shown in FIG. 1, in the present embodiment, two light sources 51 are arranged as shown in FIG. 3. However, the number of light sources may be one or three or more, and the number is not limited. This light source 51 is an excitation light source and is a blue LED in the present embodiment.

[0030] This light source 51 has an emission surface for emitting light, and the back surface of the emission surface is a mounting surface mounted on one surface of the substrate 52.

[0031] The light source 51 emits excitation light L1 with a main wavelength in the range from about 350 nm to about 500 nm toward the following incident surfaces 71a and 71b of the light guide member 70 from the emission surface. Note that as the light source 51, a light source other than a blue LED, for example, an LD (semiconductor laser) or the like can also be used. Further, in this example, the excitation light L1 is blue light with a main wavelength of about 450 nm. Furthermore, the divergence angle of the excitation light L1 emitted from the emission surface is, for example, 180°, which is a wide angle.

[0032] Also, the substrate 52 is composed of a member (such as a resin member or a metal member) that is light-impermeable and has a high thermal conductivity. This substrate 52 is attached to the outer housing 20 via a support member (not shown). Two light sources 51 are mounted on this substrate 52, but a configuration in which one light source 51 is mounted on one substrate 52 may also be adopted.

[0033] Next, the light conversion panel 60 will be described. The light conversion panel 60 has a holding member 61 and a light conversion layer 62. The holding member 61 is provided in a thin plate shape. The holding member 61 is formed of a member that is difficult to deform even when affected by heat or the like when the light conversion layer 62 is directly formed, for example, glass or a resin member, and serves as a member that reflects the excitation light L1. The thickness of this holding member 61 is determined based on the relative relationship with the attenuation of the excitation light L1 and is not particularly limited.

[0034] The light conversion layer 62 is directly formed on the front surface of the holding member 61. Thereby, the light conversion layer 62 is held by the holding member 61. The light conversion layer 62 converts the excitation light L1 emitted from the light guide member 70 and the excitation light L1 reflected from the holding member 61 into secondary light L2, and emits the secondary light L2 toward the outer lens 30 side from the front surface. Note that the front surface of the light conversion layer 62 forms a light emitting surface 63.

[0035] In addition, in this embodiment, the secondary light L2 is light including a red wavelength region, for example, light in the range of about 620 to 780 nm is applicable. Further, even when the light conversion layer 62 does not convert the excitation light L1 into the secondary light L2, the light conversion layer 62 is colored red or colored blue.

[0036] This light conversion layer 62 is made of at least one of an organic phosphor material, an organic phosphorescent material, or an inorganic phosphor material. Further, the thickness of the light conversion layer 62 is determined based on the relative relationship with the conversion from the excitation light L1 to the secondary light L2, and is not particularly limited.

[0037] In addition, the light guide member 70 is a light-transmissive member (such as a resin member). In this embodiment, for example, it is made of a transparent resin material such as PC (Polycarbonate) or PMMA (Polymethyl methacrylate). The light guide member 70 is a lens member and is a so-called light guide.

[0038] Further, the light guide member 70 is formed of a blue transparent member. Therefore, as described above, when the light guide member 70 is visually recognized from the outside of the outer lens 30 through the outer lens 30 formed of a red transparent resin, light in a wavelength region other than red cannot pass through the outer lens 30 and is absorbed.

[0039] Therefore, the light guide member 70 is visually recognized as being black. Accordingly, when visually recognizing the inside of the lamp space SP1 from the outside of the outer lens 30, components such as the light source unit 50 existing behind the light guide member 70 are hidden by the light guide member 70 visually recognized as black and cannot be visually recognized.

[0040] Note that when the light guide member 70 is formed of a blue transparent member, at least one of the case where it is formed of a transparent member colored blue and the case where the light guide member 70 itself is colorless and transparent but its outer surface is coated with blue is included.

[0041] This light guide member 70 guides the excitation light L1 from the light source unit 50 toward the light conversion panel 60 in one direction, that is, in the direction from the front side to the rear side of the vehicle (rearward direction) in this embodiment. As shown in FIGS. 2 to 4, this light guide member 70 includes a first portion 71, a second portion 72, a third portion 73, a panel support portion 74, and a substrate support portion 75.

[0042] FIG. 4 is a side cross-sectional view showing the light guide member 70 of the vehicle light-emitting unit 40. As shown in FIGS. 1 to 4, the first portion 71 is disposed on the light source unit 50 side of the light guide member 70. The first portion 71 is a portion for incident the excitation light L1 from the light source unit 50. The first portion 71 has an incident surface and a composite primary reflection surface.

[0043] The incident surface has a first incident surface 71a and a second incident surface 71b. As shown in FIG. 4, the first incident surface 71a refracts and incident the excitation light L1 from the light source unit 50 (the excitation light L1 having a solid angle of about 70° to 80° with the center of the emission surface of the light source 51 as the point (apex of the angle)) as a first incident light L11 that is parallel or substantially parallel (a part of the incident light), that is, a collimator. In the following description, the term "parallel" includes not only the case of true parallelism but also the substantially parallel state as described above. The first incident light L11 is parallel to the light source axis Z. The first incident surface 71a is provided to face the emission surface of the light source 51. Further, the first incident surface 71a is a refractive surface of a rotational hyperboloid formed by rotating a hyperbola having the center or the vicinity of the center of the emission surface of the light source 51 as the focus about the major axis (light source axis Z) of the hyperbola.

[0044] As shown in FIG. 4, the second incident surface 71b is a surface that refracts and incidentally receives the excitation light L1 from the light source unit 50 (the excitation light L1 with a solid angle ranging from approximately 70° to 80° to approximately 180° with the center of the emission surface as the point (the vertex of the angle)) as the second incident light L12 (a part of the incident light). The second incident surface 71b is provided on the outer peripheral side of the first incident surface 71a and faces the emission surface of the light source 51. The second incident surface 71b is a refractive surface of a rotating surface formed by rotating a straight line or a curve around the light source axis Z as the rotation axis. The second incident surface 71b is a refractive surface that is inclined by at least the draft angle (not shown) of the molding die (not shown) of the light guide member 70 in the direction of the light source axis Z.

[0045] The composite primary reflection surface has a first reflection surface 71c, a three-divided second reflection surface 71dB, 71dL, 71dR, a left third reflection surface 71eL, and a right third reflection surface 71eR. The three-divided second reflection surface 71dB, 71dL, 71dR may be respectively referred to as a rear second reflection surface 71dB, a left second reflection surface 71dL, and a right second reflection surface 71dR as needed.

[0046] The first reflection surface 71c is a surface that totally reflects the second incident light L12 incident from the second incident surface 71b as the first reflected light L13 parallel to the light source axis Z, that is, a collimator. This first reflection surface 71c is a rotating paraboloid formed by rotating a parabola with the center or the vicinity of the center of the emission surface of the light source 51 as the focus around the light source axis Z. Alternatively, the first reflection surface 71c is a reflection surface of a rotating surface formed by rotating a straight line following the parabola around the light source axis Z as the rotation axis.

[0047] The rear second reflecting surface 71dB is a surface that totally reflects, as the second reflected light L14, upward, a part of the first incident light L11 from the first incident surface 71a and a part of the first reflected light L13 from the first reflecting surface 71c, as shown in FIGS. 2 to 4. Note that the second reflected light L14 is parallel reflected light perpendicular to the light source axis Z. This rear second reflecting surface 71dB is provided to face the rear portion of the first incident surface 71a and the rear portion of the first reflecting surface 71c. Further, the rear second reflecting surface 71dB is a reflecting surface of a rotating curved surface formed by rotating a straight line that intersects (inclines) the light source axis Z at 45° in this example, with the light source axis Z as the rotation axis.

[0048] The left second reflecting surface 71dL is a surface that totally reflects, as the left parallel reflected light L13L perpendicular to the light source axis Z, leftward, a part of the first incident light L11 from the first incident surface 71a and a part of the first reflected light L13 from the first reflecting surface 71c, as shown in FIGS. 2 to 4. This left second reflecting surface 71dL is provided to face the left portion of the first incident surface 71a. The left second reflecting surface 71dL is a reflecting surface of a rotating curved surface formed by rotating a straight line that intersects (inclines) the light source axis Z at 45° in this example, with the light source axis Z as the rotation axis.

[0049] The right second reflecting surface 71dR is a surface that totally reflects, as the right parallel reflected light L13R perpendicular to the light source axis Z, rightward, a part of the first incident light L11 from the first incident surface 71a and a part of the first reflected light L13 from the first reflecting surface 71c, as shown in FIGS. 2 to 4. The right second reflecting surface 71dR is provided to face the right portion of the first incident surface 71a and the right portion of the first reflecting surface 71c. The right second reflecting surface 71dR is a reflecting surface of a rotating curved surface formed by rotating a straight line that intersects (inclines) the light source axis Z at 45° in this example, with the light source axis Z as the rotation axis.

[0050] Further, as shown in FIGS. 2 to 4, the left third reflecting surface 71eL totally reflects the left reflected light L13L from the left second reflecting surface 71dL upward in FIGS. 2 to 4 as the left second reflected light L14L (second reflected light L14) perpendicular to the light source axis Z. The left third reflecting surface 71eL is provided opposite to the left second reflecting surface 71dL. This left third reflecting surface 71eL is a reflecting surface of a plane that is parallel to the light source axis Z and intersects (inclines) at 45° in this example with respect to the front-rear direction.

[0051] Further, as shown in FIGS. 2 to 4, the right third reflecting surface 71eR totally reflects the right reflected light L13R from the right second reflecting surface 71dR upward in FIGS. 2 to 4 as the right second reflected light L14R (second reflected light L14) perpendicular to the light source axis Z. The right third reflecting surface 71eR is provided opposite to the right second reflecting surface 71dR. This right third reflecting surface 71eR is a reflecting surface of a plane that is parallel to the light source axis Z and intersects (inclines) at 45° in this example with respect to the front-rear direction.

[0052] Next, the second portion 72 will be described. As shown in FIGS. 2 to 4, the second portion 72 extends so as to guide light upward in FIGS. 2 to 4 from the first portion 71 toward the third portion 73. This second portion 72 is a portion of the light guide member 70 that is disposed above the boundary line BL1 with the first portion 71. The second portion 72 is a portion that reflects toward the third portion 73 while guiding the excitation light L1 from the first portion 71.

[0053] This second portion 72 has a light guide portion 72a and a third reflecting surface 72b. The light guide portion 72a guides the reflected light L14 from the second reflecting surface 71dB, the left second reflected light L14L from the left third reflecting surface 71eL, and the right second reflected light L14R from the right third reflecting surface 71eR (all of which are referred to as the second reflected light L14) upward in FIGS. 2 to 4. Further, the third reflecting surface 72b reflects the second reflected light L14 described above as a third reflected light L15 parallel to the light guide portion 73a of the third portion 73, and in the present embodiment, reflects it to the rear side of the vehicle, that is, to the left side in FIG. 4. Note that the light guide portion 72a also guides the third reflected light L15 from the third reflecting surface 72b toward the light guide portion 73a in the portion between the light guide portion 72a and the light guide portion 73a.

[0054] Next, the third portion 73 will be described. As shown in FIGS. 2 and 4, the third portion 73 is a portion that guides the third reflected light L15 reflected by the third reflecting surface 72b of the second portion 72 and emits it toward the light conversion panel 60. This third portion 73 is a portion of the light guide member 70 that extends in the third direction, which is to the left side in FIG. 4, that is, the rear side of the vehicle, rather than the boundary line BL2 with the second portion 72.

[0055] This third portion 73 has a light guide portion 73a, a fourth reflecting surface 73b, and an emission surface 73c. The light guide portion 73a guides the third reflected light L15 from the third reflecting surface 72b to the rear side of the vehicle, that is, to the left side in FIG. 4. Further, the third portion 73 is also a portion that guides the fourth reflected light L16 reflected by the fourth reflecting surface 73b toward the emission surface 73c.

[0056] Further, in FIG. 4, the fourth reflecting surface 73b slopes from front to back from top to bottom. The fourth reflecting surface 73b is a portion that reflects the light guided in the third direction in the light guide portion 73a downward in FIG. 4. The fourth reflecting surface 73b is divided into a plurality of parts in the vertical and horizontal directions, that is, vertically and horizontally. A plurality of adjacent fourth reflecting surfaces 73b in the vertical and horizontal directions are connected to each other via a connecting surface. Thereby, while keeping the plate thickness dimension of the third portion 73 constant, the inclination angle of each fourth reflecting surface 73b can be adjusted, and the dimension of the connecting surface can be adjusted to adjust the dimension between adjacent fourth reflecting surfaces 73b.

[0057] In this way, while the fourth reflecting surface 73b is divided into a plurality of parts, by adjusting the inclination angle of each fourth reflecting surface 73b, the planar shape (the shape seen from the upper side to the lower side of the vehicle) of the aggregate of the plurality of fourth reflecting surfaces 73b is made the same or substantially the same as the planar shape of the light conversion panel 60. However, although the front view shape of the aggregate of the plurality of fourth reflecting surfaces 73b is rectangular, it is different from the front view shape of the light conversion panel 60. Therefore, the range of the excitation light L1 reflected by the plurality of fourth reflecting surfaces 73b and emitted from the emission surface 73c matches the range of the light emitting surface 63 of the light conversion panel 60.

[0058] Next, the emission surface 73c will be described. The emission surface 73c is provided on the lower surface of the third portion 73 on the rear side of the vehicle with respect to the first portion 71 and the second portion 72, facing the fourth reflecting surface 73b. In the present embodiment, the emission surface 73c is planar. The emission surface 73c emits the fourth reflected light L16 reflected by the fourth reflecting surface 73b toward the light conversion panel 60 side.

[0059] Next, the panel support portion 74 and the substrate support portion 75 will be described. The light guide member 70 is provided with a panel support portion 74. The panel support portion 74 is a portion of the light guide member 70 that supports the light conversion panel 60, and is provided in a rib shape. Further, the substrate support portion 75 is a portion of the light guide member 70 that supports the substrate 52 of the light source portion 50. This substrate support portion 75 is also provided in a rib shape. Note that the light guide member 70 may adopt a configuration in which these panel support portion 74 and substrate support portion 75 are not provided. In that case, a configuration in which the light conversion panel 60 and the substrate 52 are supported by separate members can be adopted.

[0060] (Regarding the arrangement) Next, the arrangement of the internal components of the vehicle lamp 10 will be described. In the present embodiment, when the internal components of the vehicle lamp 10 are viewed from the outside of the vehicle, a light conversion panel 60 that emits red light or a light guide member 70 formed of a blue transparent member is visible on the side where secondary light is emitted from the outer lens 30 rather than the light source portion 50. However, when the internal components of the vehicle lamp 10 are viewed through the outer lens 30, the light source portion 50 including the substrate 52 and the light source 51 cannot be visually recognized due to the presence of the light conversion panel 60 or the light guide member 70.

[0061] That is, for example, consider a case where a tail lamp is arranged at a predetermined position that is a position defined by regulations. And assume that the extension line in the direction connecting the position assumed as the viewpoint of the general user and the outer lens 30 also passes through the light source portion 50. At this time, when the internal components of the vehicle lamp 10 are viewed from the outside of the vehicle, a light conversion panel 60 that emits red light or a light guide member 70 formed of a blue transparent member is visible on the side where secondary light is emitted from the outer lens 30 rather than the light source portion 50.

[0062] Therefore, the general user is in a state where the light source unit 50 cannot be visually recognized. Further, since the light guide member 70 formed of the blue transparent member appears black when viewed through the outer lens 30, for example, it does not appear in a color other than black due to the leakage light from the light guide member 70. Therefore, it is possible to dispense with the shielding parts for hiding the light guide member 70 and the light source unit 50.

[0063] Note that FIG. 5 is a plan view showing the light guide member 70H of the current vehicle light emitting unit 40H according to the comparative example. In FIG. 5, the same reference numerals as those of the respective parts according to the present embodiment are used, and an alphabetical "H" is added at the end. As shown in FIG. 5, in the vehicle light emitting unit 40H according to the comparative example, the light guide member 70H is not formed from a blue transparent member and is colorless and transparent. Therefore, the general user can visually recognize the shape of the light guide member 70H through the outer lens 30H.

[0064] Therefore, in the vehicle light emitting unit 40H according to the comparative example, by providing the shielding parts 100H, the light guide member 70H is prevented from being visually recognized through the outer lens 30H. Further, by providing the shielding part 101H, the light source unit 50H having the light source 51H and the substrate 52H is prevented from being visually recognized.

[0065] However, as shown in FIG. 5, in the vehicle light emitting unit 40H according to the comparative example, the number of parts man-hours and the number of mounting man-hours are increased by the amount of the shielding parts 100H and 101H provided.

[0066] On the other hand, in the present embodiment, it is not necessary to provide the shielding parts 100H and 101H, and the number of parts man-hours can be reduced accordingly, and the number of mounting man-hours can also be reduced.

[0067] (Regarding the effects) In the vehicle lamp 10 and the vehicle light-emitting unit 40 configured as described above, there are a light source unit 50 that emits excitation light, a light conversion panel 60 that is disposed with a space therebetween from the light source unit 50 and that converts the excitation light into secondary light and emits the secondary light, a light guide member 70 that is disposed across between the light source unit 50 and the light conversion panel 60 and guides the excitation light from the light source unit 50 toward the light conversion panel 60, and an outer lens 30 that transmits the secondary light from the light conversion panel 60 and emits it to the outside. The outer lens 30 is formed of a red transparent member, the light guide member 70 is formed of a blue transparent member, and when viewed from outside the vehicle, at least one of the light conversion panel 60 and the light guide member 70 exists on the side where the secondary light is emitted from the outer lens 30 rather than from the light source unit 50.

[0068] When configured in this way, at least one of the light conversion panel 60 and the light guide member 70 exists between the outer lens 30 and the light source unit 50 on the extension line in the direction connecting the position assumed as the perspective of the general user and the outer lens 30. Therefore, internal components such as the light source unit 50 can be prevented from being visually recognized by the light conversion panel 60 or the light guide member 70 without providing shielding components 100H, 101H as shown in FIG. 5. Therefore, it is possible to prevent internal components such as the light source unit 50 from being visually recognized by the general user.

[0069] Further, since it is not necessary to provide the shielding components 100H, 101H as shown in FIG. 5, the number of component man-hours can be reduced by the amount of not providing the shielding components 100H, 101H, and the mounting man-hours can also be reduced.

[0070] In addition, in the present embodiment, the light guide member 70 is disposed at a portion facing the light source unit 50 and the light conversion panel 60, and includes a first portion 71 for allowing the excitation light from the light source unit 50 to enter, and a portion that extends away from the first portion 71 in a direction away from the light source axis Z, which is the central direction of the excitation light emitted from the light source unit 50, to a portion that does not interfere with the light conversion panel 60, and that reflects while guiding the excitation light L1 from the first portion 71; and a third portion 73 that extends from the second portion 72 to a portion that emits light to the light conversion panel 60, and that emits the reflected light from the second portion 72 toward the light conversion panel 60.

[0071] When configured in this way, the excitation light L1 from the light source unit 50 can be efficiently emitted toward the light conversion panel 60 via the light guide member 70, and the excitation light L1 can be efficiently utilized.

[0072] In addition, the light guide member 70 can bypass the light conversion panel 60 and efficiently emit the excitation light L1 toward the light conversion panel 60 side.

[0073] In addition, in the present embodiment, the first portion 71 has incident surfaces 71a and 71b for allowing the excitation light L1 from the light source unit 50 to enter, and composite primary reflection surfaces 71c, 71dB, 71dL, 71dR, 71eL, and 71eR that reflect the excitation light L1 from the incident surfaces 71a and 71b in one direction toward the second portion 72. The second portion 72 has a third reflection surface 72b that reflects the reflected light L14 from the composite primary reflection surfaces 71c, 71dB, 71dL, 71dR, 71eL, and 71eR, and the third portion 73 has a fourth reflection surface 73b that reflects the reflected light L15 reflected by the third reflection surface 72b, and an emission surface 73c that emits the excitation light from the fourth reflection surface 73b to the light conversion panel.

[0074] When configured in this way, the vehicle light emitting unit 40 can efficiently emit the excitation light L1 from the light source unit 50 toward the light conversion panel 60 via the light guide member 70, and the excitation light L1 can be efficiently utilized.

[0075] Further, in the above-described invention, the light conversion panel 60 has a light emitting surface 63 of a light conversion layer 62 that emits light by the excitation light L1 and emits secondary light L2, and the fourth reflection surface 73b is divided into a plurality of pieces vertically and horizontally. The excitation light reflected by the plurality of fourth reflection surfaces 73b and emitted from the emission surface 73c The range irradiated with the excitation light is similar to the range of the light emitting surface 63 of the light conversion panel 60 in plan view.

[0076] When configured in this way, even if the vehicle light emitting unit 40 forms the light emitting surface 63 of the light conversion panel 60 as a design surface that arbitrarily changes in the three-dimensional direction, the excitation light L1 can be emitted from the emission surface 73c of the light guide member 70 over the entire surface of the light emitting surface 63 of the light conversion panel 60, and the excitation light L1 can be efficiently utilized.

[0077] (Modification example) Although one embodiment of the present invention has been described above, the present invention can be modified in other ways. This will be described below.

[0078] In the above-described embodiment, the vehicle light emitting unit 40 and the vehicle lamp 10 have been described as a tail lamp that constitutes a rear combination lamp. However, in the present invention, the vehicle light emitting unit 40 and the vehicle lamp 10 may be a stop lamp other than the tail lamp.

[0079] Further, if the internal components such as the light source unit 50 cannot be visually recognized by the light guide member 70 or the light conversion panel 60, the internal components such as the light source unit 50 may be arranged above or below in the lamp space SP1. Note that the present invention is not limited to the above-described embodiment.

Explanation of reference numerals

[0080] 10…Vehicle lamp, 20…Outer housing (lamp housing), 30…Outer lens, 40, 40H…Vehicle light emitting unit, 50, 50H…Light source part, 51, 51H…Light source, 52, 52H…Substrate, 60…Light conversion panel, 61…Holding member, 62…Light conversion layer, 63…Light emitting surface, 70, 70H…Light guide member, 71…First part, 71a…First incident surface, 71b…Second incident surface, 71c…First reflection surface, 71dB…Rear second reflection surface, 71dL…Left second reflection surface, 71dR…Right second reflection surface, 71eL…Left third reflection surface, 71eR…Right third reflection surface, 72…Second part, 72a…Light guide part, 72b…Third reflection surface, 73…Third part, 73a…Light guide part, 73b…Fourth reflection surface, 73c…Exit surface, 74…Panel support part, 75…Substrate support part, 100H, 101H…Shielding parts, BL1, BL2…Boundary lines, L1…Excitation light, L11…First incident light, L12…Second incident light, L13…First reflected light, L14…Second reflected light, L14L…Left second reflected light, L14R…Right second reflected light, L15…Third reflected light, L16…Fourth reflected light, L2…Secondary light, SP1…Lamp space

Claims

1. A light-emitting unit for a vehicle attached to a vehicle, comprising: a light source unit that emits excitation light; a light conversion panel that is disposed with a space therebetween from the light source unit, converts the excitation light into secondary light including a red wavelength region, and emits the secondary light; a light guide member that is disposed across between the light source unit and the light conversion panel and guides the excitation light from the light source unit toward the light conversion panel; an outer lens that transmits the secondary light from the light conversion panel and emits it to the outside; characterized in that: the outer lens is formed of a red transparent member; the light guide member is formed of a blue transparent member; at least one of the light conversion panel or the light guide member exists on the side where the secondary light is emitted from the outer lens rather than the light source unit. A light-emitting unit for a vehicle.

2. The light-emitting unit for a vehicle according to Claim 1, characterized in that: the light guide member includes: a first portion that is disposed at a portion facing the light source unit and the light conversion panel and receives the excitation light from the light source unit; a second portion that extends away from the first portion in a direction away from the light source axis which is the central direction of the excitation light emitted from the light source unit to a portion that does not interfere with the light conversion panel, and guides and reflects the excitation light from the first portion; a third portion that extends from the second portion to a portion that emits light to the light conversion panel, and emits the reflected light from the second portion toward the light conversion panel. A light-emitting unit for a vehicle.

3. The light-emitting unit for a vehicle according to Claim 2, characterized in that: the first portion includes: an incident surface that receives the excitation light from the light source unit; a composite primary reflection surface that reflects the excitation light from the incident surface in one direction to the second portion; and has; the second portion has a third reflection surface that reflects the reflected light from the composite primary reflection surface; the third portion includes: a fourth reflection surface that reflects the reflected light reflected by the third reflection surface; and an emission surface that emits the excitation light from the fourth reflection surface to the light conversion panel. The light-emitting unit for a vehicle according to Claim 2.

4. The light-emitting unit for a vehicle according to Claim 3, characterized in that: the light conversion panel has a light-emitting surface of a light conversion layer that emits light by the excitation light and emits the secondary light; the fourth reflection surface is divided into a plurality of parts vertically and horizontally. The range irradiated with the excitation light that is reflected by the plurality of the fourth reflecting surfaces and emitted from the emission surface is similar to the range of the light emitting surface of the light conversion panel in plan view. The vehicle lighting unit according to claim 3, characterized in that.

5. A lamp housing and a lamp lens that form a lamp space, The vehicle lighting unit according to any one of claims 1 to 4, disposed in the lamp space, Comprising, A vehicle lamp, characterized in that.

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