Lamp

Abstract

An emblem lamp 10 comprises an LED 24 and a plate-shaped light guide body 22 for guiding light from the LED 24. The plate-shaped light guide body 22 includes: a first incidence surface 26 formed on a first principal surface 22a, and on the optical axis Ax of the LED 24; a reflection surface 30 that is formed on a second principal surface 22b, at a position facing the first incidence surface 26, and that radially reflects light input from the first incidence surface 26 so as to direct the light in an in-plane direction of the plate-shaped light guide body 22; a second incidence surface 28 that is formed on at least a part of the periphery of the first incidence surface 26 so as to protrude to the LED 24 side from the first incidence surface 26, and that receives light from the LED 24 so as to direct the light in the in-plane direction of the plate-shaped light guide body 22; and an emission surface 32 that emits the light from the reflection surface 30 and the light from the second incidence surface 28 to the front of the lamp.

Description

Lamp

[0001] The present disclosure relates to lamps, and particularly to emblem lamps.

[0002] Conventionally, emblem lamps attached to the front or rear of vehicles are known (see, for example, Patent Document 1).

[0003] International Publication No. WO 2020 / 179577

[0004] Considering mounting on the front or rear of a vehicle, it is desirable that the dimension of the emblem lamp in the depth direction be as small as possible.

[0005] The present disclosure has been made in view of such circumstances, and an object thereof is to provide a thin lamp with a reduced dimension in the depth direction.

[0006] In order to solve the above problem, a lamp according to an aspect of the present disclosure includes a light source and a plate-shaped light guide that guides light from the light source, wherein the plate-shaped light guide comprises: a first incident surface formed on an optical axis of the light source in a first main surface facing the light source; a reflecting surface formed at a position facing the first incident surface on a second main surface opposite to the first main surface of the plate-shaped light guide, the reflecting surface reflecting light incident from the first incident surface radially with respect to the optical axis of the light source and directing the reflected light in an in-plane direction of the plate-shaped light guide; a second incident surface formed on at least a part of a periphery of the first incident surface so as to protrude toward the light source side from the first incident surface, the second incident surface allowing light from the light source to be incident thereon and directing the incident light in the in-plane direction of the plate-shaped light guide; and an exit surface that outputs light from the reflecting surface and light from the second incident surface toward the front of the lamp.

[0007] FIG. 1 is a schematic front view of the emblem lamp according to the first embodiment; FIG. 2 is an exploded perspective view of the emblem lamp according to the first embodiment; FIG. 3 is a schematic cross-sectional view taken along line A-A of the emblem lamp shown in FIG. 1; FIG. 4 is a schematic front view of the display lamp according to the second embodiment; FIG. 5 is an exploded perspective view of the display lamp according to the second embodiment; FIG. 6 is a schematic cross-sectional view taken along line A-A of the display lamp shown in FIG. 4; FIG. 7 is a schematic cross-sectional view taken along line B-B of the display lamp shown in FIG. 4; FIG. 8 is a front view of the plate-shaped light guide; FIG. 9 is a partial enlarged view of a first region at an end portion; FIG. 10 is a diagram for explaining stepped steps formed in the first region; FIG. 11 is a partial enlarged view of a second region at an end portion.

[0008] The present disclosure will be described below with reference to the drawings, based on preferred embodiments. The following configurations are illustrative for the purpose of understanding the present disclosure, and the scope of the present disclosure is determined solely by the attached claims. Identical or equivalent components and members shown in each drawing are denoted by the same reference numerals, and redundant descriptions are omitted where appropriate. In addition, the dimensions of members in each drawing are shown enlarged or reduced as appropriate for ease of understanding. Furthermore, some members that are not important for describing the embodiments are omitted in each drawing.

[0009] [First Embodiment] Figure 1 is a schematic front view of the emblem lamp 10 according to the first embodiment. Figure 2 is an exploded perspective view of the emblem lamp 10 according to the first embodiment. Figure 3 is a schematic cross-sectional view of the emblem lamp 10 shown in Figure 1 along line A-A.

[0010] The emblem lamp 10 according to this first embodiment is a light fixture that illuminates the emblem 12 and can be installed on the front, rear, or side of the vehicle. In this first embodiment, the emblem 12 is formed in an elliptical shape when viewed from the front. The emblem 12 is provided with the vehicle manufacturer's mark 13, and this mark 13 illuminates. In addition, the emblem 12 is configured so that the elliptical outer periphery 12a also illuminates.

[0011] The emblem lamp 10 comprises a lamp body 14 and an outer lens 16 that covers the front opening of the lamp body 14. The lamp body 14 and the outer lens 16 form a lamp chamber 18. Inside the lamp chamber 18, a substrate 20 and a plate-shaped light guide 22 are arranged in order from the lamp body 14 side.

[0012] An LED 24 is mounted on the substrate 20 as a light source. The LED 24 emits light when current is supplied from the substrate 20. The LED 24 is mounted on the substrate 20 so that its optical axis Ax is oriented in the front-to-back direction.

[0013] The plate-shaped light guide 22 has the role of guiding the light from the LED 24 and diffusing it out. The plate-shaped light guide 22 may be made of a transparent resin material such as acrylic or polycarbonate.

[0014] The plate-shaped light guide 22 is a substantially plate-shaped light guide having a first main surface 22a and a second main surface 22b that face each other. The plate-shaped light guide 22 is arranged so that the first main surface 22a faces backward and the second main surface 22b faces forward. The first main surface 22a of the plate-shaped light guide 22 faces the LED 24.

[0015] The plate-shaped light guide 22 includes a first incident surface 26 formed on the optical axis Ax of the LED 24 on the first main surface 22a, a second incident surface 28 formed on at least a part of the periphery of the first incident surface 26, a reflecting surface 30 formed on the second main surface 22b at a position opposite to the first incident surface 26, and an exit surface 32 formed on the second main surface 22b.

[0016] The first incident surface 26 is located on a virtual extension surface 22a' of the first main surface 22a and is formed flat along the first main surface 22a. Light emitted from the LED 24 that has a relatively small angle from the optical axis Ax is incident on the first incident surface 26. Light that enters the plate-shaped light guide 22 from the first incident surface 26 travels through the plate-shaped light guide 22 and is incident on the reflective surface 30.

[0017] The reflective surface 30 reflects light incident from the first incident surface 26 radially with respect to the optical axis Ax of the LED 24, directing it in the in-plane direction of the plate-shaped light guide 22. This reflective surface 30 is formed as a recess created by recessing the second main surface 22b of the plate-shaped light guide 22. In this first embodiment, the reflective surface 30 is formed as a mortar-shaped reflective surface. The optical axis Ax of the LED 24 coincides with the central axis of the mortar-shaped reflective surface 30. The height H of the reflective surface 30 in the thickness direction of the plate-shaped light guide 22 may be 3 / 4 or less of the plate thickness h of the plate-shaped light guide.

[0018] The second incident surface 28 is formed so as to protrude toward the LED 24 side from the first incident surface 26, at least a portion of the surrounding area. Light emitted from the LED 24 that has a relatively large angle from the optical axis Ax is incident on the second incident surface 28. The second incident surface 28 receives the light from the LED 24 and directs it toward the in-plane direction of the plate-shaped light guide 22. In this first embodiment, the light incident from the second incident surface 28 does not directly incident on the reflective surface 30.

[0019] In the plate-shaped light guide 22 according to this first embodiment, a groove 34 is provided between the first incident surface 26 and the second incident surface 28, recessed from the first main surface 22a to the second main surface 22b. By providing this groove 34, the second incident surface 28 is formed. The groove 34 has a sloped surface 34a connected to the first incident surface 26, and the virtual extension surface 34a' of this sloped surface 34a intersects with the edge 30a of the reflecting surface 30. By forming the groove 34 in this way, light incident from the second incident surface 28 does not directly incident on the reflecting surface 30, but travels in the in-plane direction of the plate-shaped light guide 22.

[0020] The emission surface 32 is formed on the second main surface 22b of the plate-shaped light guide 22. The emission surface 32 emits light forward of the lamp, which is incident from the first incident surface 26, reflected by the reflective surface 30 and traveling in the in-plane direction within the plate-shaped light guide 22, and light incident from the second incident surface 28 and traveling directly in the in-plane direction within the plate-shaped light guide 22. A step 36 is formed on the first main surface 22a of the plate-shaped light guide 22 in the portion facing the emission surface 32, which reflects and refracts the light traveling in the in-plane direction within the plate-shaped light guide 22 and directs it toward the emission surface 32 for emission forward of the lamp.

[0021] The outer lens 16 is made of a transparent resin material such as acrylic or polycarbonate, and provides predetermined emblem illumination by transmitting light from the plate-shaped light guide 22. The outer lens 16 is provided with a transmissive portion 16a that transmits light emitted from the emission surface 32 and a light-shielding portion 16b that blocks light emitted from the emission surface 32. The outer lens 16 has a transmissive portion 16a in the portion corresponding to the mark 13 and the outer circumference 12a, and a light-shielding portion 16b in the portion corresponding to the rest. The light-shielding portion 16b may be formed by coating or printing a light-shielding member 38. It is desirable that the light-shielding portion 16b be positioned in front of the reflective surface 30 of the plate-shaped light guide 22. This is because light is totally reflected at the reflective surface 30, so no light is emitted in front of the lamp. In addition, positioning the light-shielding portion 16b on the optical axis Ax of the LED 24 is also effective in preventing point illumination.

[0022] As described above, in the emblem lamp 10 according to this first embodiment, two incident surfaces, a first incident surface 26 and a second incident surface 28, are provided for the LED 24. By dividing the incident surface for the LED 24 into two, it is possible to make the plate-shaped light guide 22 thinner, and an emblem lamp 10 with reduced dimensions in the depth direction can be realized.

[0023] [Second Embodiment] Conventionally, indicator lights such as indicator lights that are attached to the front or rear of a vehicle are known (see, for example, Patent Document 1).

[0024] In display lighting fixtures, the area of ​​the display surface to be illuminated is designated as a light-transmitting area, and the other areas as light-blocking areas. By shining light from the back side toward the display surface, the desired mark can be illuminated. If the peripheral area of ​​the display surface needs to be illuminated in a display lighting fixture, using a separate light source from the light source for the display surface may lead to increased costs.

[0025] This disclosure has been made in view of these circumstances, and its purpose is to provide a display light fixture that can suitably illuminate the peripheral edge of the display surface with a small amount of light source.

[0026] To solve the above problems, an indicator light fixture in one embodiment of the present disclosure is an indicator light fixture in which a light source and a plate-shaped light guide for guiding light from the light source are arranged in a lamp chamber formed by a lamp body and an outer lens, wherein the outer lens comprises a display surface and a sealing leg formed at the end of the display surface. The display surface of the outer lens comprises a transmissive portion and a light-shielding portion. The plate-shaped light guide comprises a light-ingress portion into which light from the light source is incident, a reflective portion that diffuses and reflects the light incident from the light-ingress portion within the surface of the plate-shaped light guide, an emission portion that emits a portion of the light traveling through the plate-shaped light guide toward the outer lens, and an end portion that emits a portion of the light traveling through the plate-shaped light guide toward the sealing leg of the outer lens. Light from the emission portion of the plate-shaped light guide is emitted forward of the light fixture through the transmissive portion of the display surface, and light from the end portion of the plate-shaped light guide is incident into the sealing leg and emitted forward of the light fixture from the front end surface of the sealing leg.

[0027] Figure 4 is a schematic front view of the indicator light fixture 1010 according to the second embodiment. Figure 5 is an exploded perspective view of the indicator light fixture 1010 according to the second embodiment. Figure 6 is a schematic cross-sectional view taken along line A-A of the indicator light fixture 1010 shown in Figure 4. Figure 7 is a schematic cross-sectional view taken along line B-B of the indicator light fixture 1010 shown in Figure 4.

[0028] The indicator light 1010 according to this second embodiment is an emblem lamp that illuminates an emblem 1012, and can be installed on the front, rear, or side of a vehicle. In this second embodiment, the emblem 1012 is formed in an elliptical shape when viewed from the front. The emblem 1012 is provided with the vehicle manufacturer's mark 1013, and this mark 1013 illuminates. In addition, the elliptical peripheral portion 1012a of the emblem 1012 is also configured to illuminate.

[0029] The indicator light fixture 1010 comprises a lamp body 1014 and an outer lens 1016 that covers the front opening of the lamp body 1014. The lamp body 1014 and the outer lens 1016 form a light chamber 1018. Inside the light chamber 1018, a substrate 1020 and a plate-shaped light guide 1022 are arranged in order from the lamp body 1014 side.

[0030] An LED 1024 is mounted on the substrate 1020 as a light source. The LED 1024 emits light when current is supplied from the substrate 1020. The LED 1024 is mounted on the substrate 1020 so that its optical axis Ax is oriented in the front-to-back direction.

[0031] The plate-shaped light guide 1022 has the role of guiding the light from the LED 1024 and diffusing it out. The plate-shaped light guide 1022 may be formed from a transparent resin material such as acrylic or polycarbonate.

[0032] The plate-shaped light guide 1022 is a substantially plate-shaped light guide having a first main surface 1022a and a second main surface 1022b that face each other. The plate-shaped light guide 1022 is arranged so that the first main surface 1022a faces backward and the second main surface 1022b faces forward. The first main surface 1022a of the plate-shaped light guide 1022 faces the LED 1024.

[0033] The plate-shaped light guide 1022 includes a light-receiving portion 1026 formed on the optical axis Ax of the LED 1024 on the first main surface 1022a, a reflecting portion 1030 formed on the second main surface 1022b at a position opposite to the light-receiving portion 1026, and an emission portion 1032 formed on the second main surface 1022b.

[0034] The light-receiving section 1026 directs the light emitted from the LED 1024 into the plate-shaped light guide 1022. The light-receiving section 1026 diffuses and reflects the light incident from the light-receiving section 1026 within the plane of the plate-shaped light guide 1022.

[0035] The emission section 1032 is formed on the second main surface 1022b of the plate-shaped light guide 1022. The emission section 1032 emits a portion of the light that, after being incident from the light-ingress section 1026 and reflected by the reflecting section 1030, travels through the plate-shaped light guide 1022 towards the outer lens 1016 at the front of the lamp. A step 1036 is formed on the first main surface 1022a of the plate-shaped light guide 1022, in the portion facing the emission section 1032, to reflect and refract the light traveling through the plate-shaped light guide 1022 and direct it towards the emission section 1032, emitting it forward of the lamp.

[0036] The outer lens 1016 is formed of a transparent resin material such as acrylic or polycarbonate, and provides the desired emblem illumination by transmitting light from the plate-shaped light guide 1022. The front surface of the outer lens 1016 is a display surface 1017. The display surface 1017 includes a transmissive portion 1017a that emits light emitted from the emission portion 1032 forward of the lamp, and a light-shielding portion 1017b that blocks the light emitted from the emission portion 1032. The transmissive portion 1017a is shaped to correspond to the mark 1013. The light-shielding portion 1017b may be formed by coating or printing a light-shielding member onto the display surface 1017.

[0037] The outer lens 1016 is provided with a sealing leg 1034 formed at the end of the display surface 1017. In the display lamp 1010 according to this second embodiment, the sealing leg 1034 has the function of sealing the inside of the lamp chamber 1018 in conjunction with the lamp body 1014, and also has the function of illuminating the peripheral edge 1012a of the display surface 1017. The sealing leg 1034 has a protruding portion 1034a that protrudes forward of the lamp beyond the display surface 1017.

[0038] In the indicator light fixture 1010 according to this second embodiment, the end portion 1038 of the plate-shaped light guide 1022 emits a portion of the light traveling inside the plate-shaped light guide 1022 toward the sealing leg 1034. The light emitted from the end portion 1038 of the plate-shaped light guide 1022 enters the sealing leg 1034, is guided inside the sealing leg 1034, and is emitted forward from the projection 1034a formed on the front end surface of the light fixture. The light emitted from the front end surface of the sealing leg 1034 provides illumination of the peripheral portion 1012a.

[0039] As described above, in the display lamp 1010 according to this second embodiment, the light emitted from the end portion 1038 of the plate-shaped light guide 1022 is incident on the sealing leg 1034 of the outer lens 1016, and emitted from the front end surface of the sealing leg 1034 to the front of the lamp, thereby realizing the illumination of the peripheral portion 1012a. Since a separate light source is not provided for the illumination of the peripheral portion 1012a, and the LED 1024 used to illuminate the display surface 1017 is shared, the number of light sources can be reduced, and cost increases can be suppressed.

[0040] The sealing leg 1034 may be formed from a material containing light-scattering particles. By scattering the light incident on the sealing leg 1034 with light scattering balance, the uniformity of light emission at the peripheral portion 1012a can be improved. In addition, the light incident surface 1034b of the sealing leg 1034, into which light from the end portion 1038 of the plate-shaped light guide 1022 is incident, may be provided with optical elements such as textures or steps that diffuse the incident light. In this case as well, the uniformity of light emission at the peripheral portion 1012a can be improved.

[0041] Figure 8 is a front view of the plate-shaped light guide 1022. In the indicator light fixture 1010 according to this second embodiment, the light-receiving portion 1026 is positioned offset from the center of the plate-shaped light guide 1022 in the peripheral direction. This is because if the light-receiving portion 1026 were positioned at the center of the plate-shaped light guide 1022, the transmitting portion 1017a might appear as a point of light. By positioning the light-receiving portion 1026 offset from the center in the peripheral direction and positioning the light-shielding portion 1017b on the optical axis Ax, point of light can be prevented.

[0042] However, when the position of the light-receiving portion 1026 is shifted from the center of the plate-shaped light guide 1022, the angle of incidence of the light incident on the end portion 1038 of the plate-shaped light guide 1022 changes significantly depending on the location of the end portion 1038. In the plate-shaped light guide 1022 shown in Figure 8, in the first region 1040 of the end portion 1038, the incident light exceeds the critical angle, but in the second region 1042 of the end portion 1038, which is further from the LED 1024 than the first region 1040, the angle of incidence is below the critical angle. In the first region 1040, where the incident light exceeds the critical angle, the incident light undergoes total internal reflection, making it difficult to emit light toward the seal leg 1034. Therefore, in the indicator light fixture 1010 according to this second embodiment, a stepped optical element (step) is provided in the first region 1040 to emit light toward the surface direction of the plate-shaped light guide 1022. The plane direction is parallel to the main surface of the plate-shaped light guide 1022. Figure 9 is an enlarged view of a part of the first region 1040 of the end portion 1038. As shown in Figure 9, a plurality of stepped steps 1044 are formed in the first region 1040 of the end portion 1038. These steps 1044 make it possible to create a surface in the first region 1040 with an angle below the critical angle, so that light can be emitted toward the sealing leg 1034.

[0043] Figure 10 is a diagram illustrating a stepped step 1044 formed in the first region 1040. As shown in Figure 10, the step 1044 may be formed including a concave surface 1044a. For example, if the plate-shaped light guide 1022 is made of acrylic with a critical angle of 42.2°, the concave surface 1044a may be formed to have a surface with an angle θ = 0° to 47.8° with respect to the normal to the optical axis 1045 from the light-receiving portion 1026, in order to cause the incident light to exit the plate-shaped light guide 1022.

[0044] In the second region 1042 of the end portion 1038 shown in Fig. 8, since the incident angle of light incident on the end portion 1038 is equal to or less than the critical angle, the stepped step 1044 is unnecessary. Fig. 11 is an enlarged view of a part of the second region 1042 of the end portion 1038. In the display lamp 1010 according to the second embodiment, an optical element (step) 1046 that emits light toward the front of the lamp rather than in the surface direction of the plate-shaped light guide 1022 is provided in the second region 1042 of the end portion 1038. By providing such a step 1046, light incident on the seal leg 1034 of the outer lens 1016 is easily emitted toward the front of the lamp.

[0045] As shown in Fig. 8, the end portion 1038 of the plate-shaped light guide 1022 further includes a third region 1048 that is shorter in distance from the LED 1024 than the first region 1040. The third region 1048 is formed so as to emit light in the surface direction of the plate-shaped light guide 1022 by a curved surface 1049 having no step. In the plate-shaped light guide 1022 shown in Fig. 8, the end portion 1038 includes a fourth region 1050 between the first region 1040 and the third region 1048. In the fourth region 1050, the incident angle of light incident on the end portion 1038 is equal to or less than the critical angle, so that the stepped step 1044 is unnecessary as in the second region 1042. Similarly to the second region 1042, the fourth region 1050 is provided with a step 1046 that emits light toward the front of the lamp rather than in the surface direction of the plate-shaped light guide 1022.

[0046] Some embodiments of the present disclosure are as follows: (Item 1) A luminaire comprising a light source and a plate-shaped light guide for guiding light from the light source, wherein the plate-shaped light guide includes: a first incident surface formed on the optical axis of the light source on a first main surface facing the light source; a reflective surface formed on a second main surface of the plate-shaped light guide facing the first main surface, at a position facing the first incident surface, which reflects light incident from the first incident surface radially with respect to the optical axis of the light source and directs it toward the in-plane direction of the plate-shaped light guide; a second incident surface formed in at least a part of the periphery of the first incident surface so as to protrude toward the light source side from the first incident surface, which receives light from the light source and directs it toward the in-plane direction of the plate-shaped light guide; and an exit surface that emits light from the reflective surface and light from the second incident surface toward the front of the luminaire. (Item 2) The luminaire according to Item 1, wherein the first incident surface is formed flat along the first main surface. (3) The lamp according to item 1 or 2, characterized in that the first incident surface is located on the extended surface of the first main surface. (4) The lamp according to any one of items 1 to 3, characterized in that the height of the reflective surface in the thickness direction of the plate-shaped light guide is 3 / 4 or less of the thickness of the plate-shaped light guide. (5) The lamp according to any one of items 1 to 4, characterized in that a groove is provided between the first incident surface and the second incident surface, recessed from the first main surface side to the second main surface side. (6) The lamp according to item 5, characterized in that the groove has a slope connected to the first incident surface, and the extended surface of the slope intersects with the edge of the reflective surface. (7) The lamp according to any one of items 1 to 6, further comprising an outer lens arranged to cover the output surface, wherein the outer lens is provided with a transmissive portion that transmits light emitted from the output surface and a light-shielding portion that blocks light emitted from the output surface, and the light-shielding portion is arranged in front of the reflective surface of the lamp.(Item 8) A display lamp comprising a lamp body and an outer lens, wherein a light source and a plate-shaped light guide for guiding light from the light source are arranged in a lamp chamber formed by the lamp body and the outer lens, wherein the outer lens comprises a display surface and a sealing leg formed at the end of the display surface, the display surface of the outer lens comprises a transmissive portion and a light-shielding portion, the plate-shaped light guide comprises a light-ingress portion into which light from the light source is incident, a reflective portion that diffuses and reflects the light incident from the light-ingress portion within the surface of the plate-shaped light guide, an emission portion that emits a portion of the light traveling through the plate-shaped light guide toward the outer lens, and an end portion that emits a portion of the light traveling through the plate-shaped light guide toward the sealing leg of the outer lens, wherein the light from the emission portion of the plate-shaped light guide is emitted forward of the lamp through the transmissive portion of the display surface, and the light from the end portion of the plate-shaped light guide is incident into the sealing leg and emitted forward of the lamp from the front end surface of the sealing leg. (Clause 9) The display lamp according to Clause 8, wherein the light-receiving portion is positioned offset in the peripheral direction from the center of the plate-shaped light guide, the end of the plate-shaped light guide includes a first region and a second region which is further away from the light source than the first region, and the first region has a stepped first optical element which emits light in the plane direction of the plate-shaped light guide. (Clause 10) The display lamp according to Clause 9, wherein the second region of the end has a second optical element which emits light forward of the lamp than in the plane direction of the plate-shaped light guide. (Clause 11) The display lamp according to Clause 9 or 10, wherein the end of the plate-shaped light guide further includes a third region which is further away from the light source than the first region, and the third region is formed by a curved surface without steps which emits light in the plane direction of the plate-shaped light guide. (Clause 12) The display lamp according to any one of Clauses 8 to 11, wherein the sealing leg includes light-scattering particles. (Item 13) The indicator light fixture according to any one of items 8 to 12, characterized in that the light incident surface of the sealing leg has a third optical element that diffuses the incident light. (Item 14) The indicator light fixture according to any one of items 8 to 13, characterized in that the sealing leg has a projection that protrudes forward of the light fixture beyond the display surface.(Claim 15) The display lamp according to Claim 9, characterized in that the first optical element is formed including a concave surface.

[0047] The present disclosure has been described above based on embodiments. It should be understood by those skilled in the art that these embodiments are merely illustrative, various modifications can be made to combinations of respective components and respective processing steps, and such modifications are also within the scope of the present disclosure.

[0048] The present disclosure can be applied to emblem lamps.

[0049] 10: emblem lamp, 12: emblem, 13: mark, 14: lamp body, 16: outer lens, 20: substrate, 22: plate-shaped light guide, 24: LED, 26: first incident surface, 28: second incident surface, 30: reflective surface, 32: exit surface, 34: groove, 1010: display lamp, 1012: emblem, 1013: mark, 1014: lamp body, 1016: outer lens, 1017: display surface, 1018: lamp chamber, 1020: substrate, 1022: plate-shaped light guide, 1024: LED, 1026: light incident section, 1030: reflective section, 1032: exit section, 1034: seal leg, 1036: step, 1038: end portion, 1040: first region, 1042: second region, 1048: third region, 1050: fourth region.

Claims

1. A luminaire comprising a light source and a plate-shaped light guide for guiding light from the light source, wherein the plate-shaped light guide includes: a first incident surface formed on the optical axis of the light source on a first main surface facing the light source; a reflective surface formed on a second main surface of the plate-shaped light guide facing the first main surface, at a position facing the first incident surface, which reflects light incident from the first incident surface radially with respect to the optical axis of the light source and directs it in the in-plane direction of the plate-shaped light guide; a second incident surface formed at least a part of the periphery of the first incident surface so as to protrude toward the light source side from the first incident surface, which receives light from the light source and directs it in the in-plane direction of the plate-shaped light guide; and an exit surface that emits light from the reflective surface and light from the second incident surface forward of the luminaire.

2. The lamp according to claim 1, characterized in that the first incident surface is formed flat along the first main surface.

3. The lamp according to claim 1, characterized in that the first incident surface is located on the extended surface of the first main surface.

4. The lamp according to claim 1, characterized in that the height of the reflective surface in the thickness direction of the plate-shaped light guide is 3 / 4 or less of the thickness of the plate-shaped light guide.

5. The lamp according to claim 1, characterized in that a groove is provided between the first incident surface and the second incident surface, extending from the first main surface side to the second main surface side.

6. The lamp according to claim 5, characterized in that the groove has an inclined surface connected to the first incident surface, and the extended surface of the inclined surface intersects with the edge of the reflective surface.

7. The lamp according to any one of claims 1 to 6, further comprising an outer lens arranged to cover the emission surface, wherein the outer lens is provided with a transmissive portion that transmits light emitted from the emission surface and a light-shielding portion that blocks light emitted from the emission surface, and the light-shielding portion is arranged in front of the reflective surface of the lamp.

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