Light-transmitting panels for vehicles

Abstract

To provide a light-transmitting panel for vehicles that can improve light transmittance. [Solution] The luminescent emblem 13 comprises a base material 20 that is transparent to visible light and is positioned on the design surface 13a side of the luminescent emblem 13, and a decorative layer 30 laminated on the side of the base material 20 opposite to the design surface 13a side. The luminescent emblem 13 has a plurality of holes 40 that penetrate the decorative layer 30 in the front-to-back direction. The bottom surface 41a of the holes 40 has an uneven shape. The plurality of holes 40 are filled with a filling portion 52 that is transparent to visible light. The base material 20 and the filling portion 52 are made of a resin material in which the difference in refractive index between them is smaller than the difference in refractive index between the base material 20 and air.

Description

Technical Field

[0001] The present invention relates to a light-transmissive panel for a vehicle.

Background Art

[0002] Patent Document 1 describes a backlight display panel that transmits light from a light source disposed on the back surface of the panel to the front surface of the panel for backlight display. This backlight display panel has an opaque layer, a transparent layer laminated on one surface of the opaque layer, and a plurality of holes penetrating the opaque layer. The opaque layer is a resin layer made opaque by adding a colorant such as a pigment or a dye. The transparent layer is a resin layer formed by blending a colorant in a transparent resin composition in a blending amount that provides a sufficient coloring effect and light transmission amount. The plurality of holes are formed, for example, by a laser ablation processing method using ultraviolet light.

[0003] In this backlight display panel, light from the light source passing through the plurality of holes is transmitted through the transparent layer, thereby performing a backlight display of a color corresponding to the color of the transparent layer.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] Incidentally, in these backlit display panels, if the removal of the opaque layer by laser light is insufficient when forming multiple holes, the transmission of light from the light source will be obstructed by the opaque layer. For this reason, conventionally, multiple holes are formed so that some of them reach the interior of the transparent layer. However, in this case, the area of ​​the transparent layer that becomes the incident surface of light is roughened by the laser light, forming a fine uneven shape on the incident surface. As a result, the light incident on the transparent layer is diffusely reflected on the incident surface, which may reduce the light transmittance in the transparent layer. [Means for solving the problem]

[0006] This document describes various embodiments of light-transmitting panels for vehicles that address the above-mentioned problems. [Aspect 1] A light-transmitting panel for a vehicle, which is positioned outside a light source and constitutes part of the outer shell of the vehicle, comprising: a base material having visible light transmittance and positioned on the design surface side of the light-transmitting panel for a vehicle; and a decorative layer laminated on the surface of the base material opposite to the design surface side, wherein the light-transmitting panel for a vehicle has a plurality of holes formed therein that penetrate the decorative layer in the thickness direction and whose bottom surface is made of the base material, the bottom surface has an uneven shape, and the plurality of holes are filled with a filling portion having visible light transmittance, and the base material and the filling portion are made of a resin material in which the difference in refractive index between them is smaller than the difference in refractive index between the base material and air,

[0007] According to the above configuration, visible light (hereinafter simply referred to as "light") emitted from the light source and incident on the filling portion passes through the filling portion and incident on the interface with the substrate, i.e., the bottom surface of the hole. Then, the light incident on the substrate passes through the substrate and is emitted outward, causing the portion of the vehicle light-transmitting panel corresponding to the hole to emit light.

[0008] Furthermore, with the above configuration, the difference in refractive index between the substrate and the filler is smaller than the difference in refractive index between the substrate and air. Generally, the reflectance and refraction of light at the interface between materials with different refractive indices decrease as the difference in refractive index between them decreases. Therefore, the diffuse reflection component of light at the interface with the substrate is smaller compared to when no filler is provided.

[0009] Furthermore, according to the above configuration, the portion of the vehicle light-transmitting panel that serves as the light incidence surface becomes the interface between the filled portion and the air. Therefore, if the portion of the filled portion that constitutes the incidence surface is made smoother than the bottom surface of the hole, the diffuse reflection of light at the incidence surface is suppressed compared to the case where the incidence surface is composed of the bottom surface of the hole.

[0010] Therefore, the light transmittance in light-transmitting panels for vehicles can be improved. [Aspect 2] The vehicle light-transmitting panel according to [Aspect 1], wherein the base material and the filling portion are made of resin materials having a difference of 0.2 or less in refractive index between them.

[0011] The above configuration allows for the reduction of the diffuse reflection component of light at the interface between the filling portion and the substrate, which is a desirable effect. Therefore, the light transmittance in the vehicle light-transmitting panel can be further improved.

[0012] [Aspect 3] The light-transmitting panel for vehicles according to [Aspect 1] or [Aspect 2], wherein the filling portion contains a coloring agent. According to the above configuration, the fill portion is colored with a coloring agent. As a result, the light emitted outward through the holes in the vehicle light-transmitting panel changes to a color corresponding to the color of the fill portion, or more specifically, a color resulting from a mixture of the color of the fill portion and the original color of the light. Therefore, by appropriately changing the type of coloring agent incorporated into the fill portion, the luminescence color of the portion of the vehicle light-transmitting panel corresponding to the holes can be changed. Furthermore, by appropriately adjusting the amount of coloring agent incorporated into the fill portion, the hue of the luminescence color of the portion of the vehicle light-transmitting panel corresponding to the holes can be adjusted.

[0013] [Aspect 4] The light-transmitting panel for a vehicle according to any one of [Aspect 1] to [Aspect 3], wherein the decorative layer comprises a coloring layer containing a coloring agent, and an opacity layer provided on the side opposite to the substrate with respect to the coloring layer in the thickness direction, and containing a coloring agent with higher opacity than the coloring agent contained in the coloring layer.

[0014] According to the above configuration, light entering the vehicle's light-transmitting panel from the outside is reflected by the colored layer, so that the design surface of the vehicle's light-transmitting panel is visible from the outside in a color corresponding to the color of the colored layer.

[0015] Furthermore, with the above configuration, light that passes through the colored layer of the light-transmitting panel for vehicles that enters from the outside is reflected or absorbed by the concealing layer. As a result, components such as light sources positioned inside the vehicle's light-transmitting panel become less visible from the outside.

[0016] Therefore, the appearance of the vehicle's light-transmitting panel can be improved when the light source is not illuminated. [Aspect 5] The vehicle light-transmitting panel according to any one of [Aspect 1] to [Aspect 4], wherein the substrate comprises a substrate body and a protective layer laminated on the surface of the substrate body opposite to the design surface side and containing an additive that reflects laser light.

[0017] When forming a plurality of hole portions by laser processing, a laser beam is irradiated from the side of the decorative layer to a laminate in which the decorative layer is laminated on the surface opposite to the design surface side of the base material. As a result, first, the portion of the decorative layer corresponding to the hole portion is removed. Here, according to the above configuration, a protective layer is laminated on the surface opposite to the design surface side of the base material body. Therefore, the laser beam is reflected by the additive in the protective layer, making it difficult for the protective layer to absorb the laser beam. As a result, the protective layer is difficult to be removed by the laser beam, and the portion of the protective layer constituting the bottom surface of the hole portion is difficult to be roughened by the laser beam. That is, it is difficult to form an uneven shape on the bottom surface of the hole portion. Thereby, the specular reflection component at the interface between the filling portion and the base material can be further reduced. Therefore, the light transmittance of the light transmission panel for vehicles can be further improved.

Effect of the Invention

[0018] According to the present invention, the light transmittance of the light transmission panel for vehicles can be improved.

Brief Description of the Drawings

[0019] [Figure 1] FIG. 1 is a front view showing a light-emitting emblem for a light transmission panel for a vehicle according to a first embodiment. [Figure 2] FIG. 2 is a cross-sectional view showing an enlarged view of one of a plurality of hole portions of the light-emitting emblem of FIG. 1. [Figure 3] FIG. 3 is a view showing a second embodiment of the light transmission panel for a vehicle, which is a cross-sectional view corresponding to FIG. 2.

Modes for Carrying Out the Invention

[0020] Hereinafter, each embodiment of the light transmission panel for a vehicle will be described with reference to FIGS. 1 to 3. In each embodiment, the present invention is embodied as a light-emitting emblem for a vehicle. Hereinafter, the front-rear direction of the vehicle will be referred to as the front-rear direction, and the front and rear in the front-rear direction will be simply described as the front and the rear.

[0021] <First Embodiment> As shown in FIGS. 1 and 2, a light source 12 and a light-emitting emblem 13 disposed in front of the light source 12 are attached to the front portion 11 of the vehicle. The light source 12 is constituted by a light-emitting element such as a light-emitting diode (LED: Light Emitting Diode), for example. The light source 12 is attached to the vehicle so as to emit visible light along the front-rear direction. That is, in the present embodiment, the front-rear direction of the vehicle corresponds to the emission direction of the visible light from the light source 12. Hereinafter, the visible light emitted from the light source 12 may be simply referred to as light L1 for distinction from the visible light irradiated from the outside.

[0022] As shown in FIGS. 1 and 2, the light-emitting emblem 13 forms a part of an exterior panel as an outer shell of the vehicle, and is plate-shaped having a thickness in the front-rear direction in a state of being attached to the vehicle. The outer edge shape of the light-emitting emblem 13 is circular in a front view. The design surface 13a of the light-emitting emblem 13 is constituted by a display area 14 for displaying a mark toward the outside of the vehicle and a background area 15 serving as a background other than the display area 14. Here, the “mark” includes, for example, a designed character (logo type) indicating the vehicle maker name, vehicle name, grade name, etc., a figure (symbol mark) symbolizing the vehicle maker, etc., or a logo mark formed by combining characters and figures. In the present embodiment, the display area 14 is constituted by a character portion 14a indicating the English letter “A” and an annular portion 14b extending along the outer peripheral edge of the light-emitting emblem 13 and surrounding the character portion 14a.

[0023] As shown in FIG. 2, the light-emitting emblem 13 includes a base material 20, a decorative layer 30, and a filling layer 50. (Base Material 20) The base material 20 is formed from a transparent resin material that transmits visible light. Examples of resin materials that can form the base material 20 include acrylic resins such as polymethyl methacrylate (PMMA) and polycarbonate (PC). In this embodiment, the base material 20 is made of PC (refractive index: 1.59) and is colorless and transparent. The base material 20 is positioned on the design surface 13a side (the front in this embodiment). More specifically, the base material 20 is positioned at the very front of the luminescent emblem 13.

[0024] (Decorative layer 30) As shown in Figure 2, a decorative layer 30 for decorating the luminescent emblem 13 is laminated and bonded to the rear surface 20b of the base material 20, which is the surface opposite to the design surface 13a (the rear in this embodiment). The decorative layer 30 has a coloring layer 31 and an opacity layer 32.

[0025] The colored layer 31 is a resin layer containing a coloring agent such as a pigment or dye. In this embodiment, the colored layer 31 is a colored coating film formed by applying a paint in which pigments of any color are dispersed to the rear surface 20b of the substrate 20.

[0026] The opacity layer 32 is a resin layer containing a colorant with higher opacity than the colorant contained in the colored layer 31. Specifically, the opacity layer 32 is formed from a resin material in which white pigments that reflect visible light, such as titanium dioxide, and black pigments that absorb visible light, such as carbon black, are dispersed. In this embodiment, the opacity layer 32 is a black coating film formed by applying a paint in which carbon black is dispersed to the rear surface 31b of the colored layer 31.

[0027] The luminescent emblem 13 has multiple holes 40 that penetrate the decorative layer 30 in the front-to-back direction, which is the thickness direction of the decorative layer 30. The display area 14 is formed by the multiple holes 40. The diameter of each hole 40 is, for example, 0.06 mm or more and 2.0 mm or less. Each hole 40 penetrates the decorative layer 30, and a part of it (hereinafter referred to as the bottom portion 41) extends to the base material 20. That is, the bottom portion 41 of each hole 40 is made up of the base material 20. The bottom portion 41 has a bottom surface 41a that constitutes a part of the rear surface 20b of the base material 20. The bottom surface 41a is provided with a fine uneven shape formed by laser light. The term "laser light" used here refers to laser light of wavelengths emitted from well-known lasers used for peeling resin layers, such as YAG lasers and carbon dioxide lasers. For example, this includes light with wavelengths of 1064 nm (NIR laser), 532 nm (green laser), 355 nm (UV laser), or approximately 9.2 μm to 10.8 μm (FIR laser).

[0028] (Filled layer 50) The filling layer 50 is provided on the side opposite to the base material 20, with the decorative layer 30 in between in the front-to-back direction. The filling layer 50 has a base layer 51 and a plurality of filling portions 52. The base layer 51 is laminated and bonded to the rear surface 32b of the concealing layer 32. The rear surface 51b of the base layer 51 mainly constitutes the rear surface of the luminescent emblem 13. The rear surface 51b faces the light source 12 in the front-to-back direction. The rear surface 51b is a smoother surface than the bottom surface 41a. The filling portions 52 are the parts of the filling layer 50 that are filled into the plurality of holes 40. Each filling portion 52 protrudes forward from the front surface 51a of the base layer 51.

[0029] The filling layer 50 is formed of a transparent resin material that transmits visible light. The filling layer 50 is formed of a resin material whose refractive index difference with respect to the substrate 20 is smaller than the refractive index difference between the substrate 20 and air (refractive index: 1.00). From the viewpoint of improving the transmittance of light L1 in the substrate 20, it is preferable to use a resin material for forming the filling layer 50 such that the refractive index difference between the substrate 20 and the filling layer 50 is 0.2 or less. Examples of such resin materials include transparent resins such as acrylic resin. In this embodiment, the filling layer 50 is formed of PMMA (refractive index: 1.49) and is colorless and transparent.

[0030] <Operation of the First Embodiment> Light L1 emitted from the light source 12 and incident on the packed layer 50 passes through the packed portion 52 and incident on the interface with the substrate 20, i.e., the bottom surface 41a of the hole portion 40. Then, the light L1 incident on the substrate 20 passes through the substrate 20 and is emitted outward (see light L2 shown by the dashed line in Figure 2), causing the display area 14, which is the part of the light-emitting emblem 13 corresponding to the hole portion 40, to light up and be displayed.

[0031] Furthermore, according to the configuration of the first embodiment, the difference in refractive index between the substrate 20 (refractive index: 1.59) and the packing layer 50 (refractive index: 1.49) is smaller than the difference in refractive index between the substrate 20 and air (refractive index: 1.00). Generally, the reflectance and refraction of light at the interface between materials with different refractive indices decrease as the difference in their refractive indices decreases. Therefore, the diffuse reflection component of light L1 at the interface with the substrate 20 is reduced compared to the case where the packing layer 50 is not provided.

[0032] Furthermore, according to the configuration of the first embodiment, the portion of the light-emitting emblem 13 that becomes the incident surface for light L1 is the interface between the filling layer 50 and the air, i.e., the rear surface 51b. Here, the rear surface 51b is a smoother surface than the bottom surface 41a of the hole 40. Therefore, compared to the case where the incident surface is composed of the bottom surface 41a of the hole 40, diffuse reflection of light L1 at the incident surface is suppressed. In particular, according to the configuration of the first embodiment, the refractive index of the filling layer 50 constituting the incident surface for light L1 (1.49) is greater than the refractive index of air (1.00) and less than the refractive index of the base material 20 (1.59). Therefore, compared to the case where the filling layer 50 is formed of a resin material with a refractive index the same as or greater than that of the resin material forming the base material 20, the reflectance and refraction of light L1 incident on the filling layer 50 are reduced.

[0033] <Effects of the First Embodiment> (1-1) The luminescent emblem 13 comprises a base material 20 that transmits visible light and a decorative layer 30 that is laminated and bonded to the rear surface 20b of the base material 20. The luminescent emblem 13 has a plurality of holes 40 that penetrate the decorative layer 30 in the front-to-back direction, and whose bottom surface 41a is made of the base material 20. The bottom surface 41a has an uneven shape. The plurality of holes 40 are filled with a filling portion 52 that transmits visible light. The base material 20 and the filling layer 50 are made of a resin material in which the difference in refractive index between them is smaller than the difference in refractive index between the base material 20 and air.

[0034] This configuration produces the effects described above. Therefore, the transmittance of light L1 in the luminescent emblem 13 can be improved. (1-2) The base material 20 and the filling layer 50 are formed of resin materials such that the difference in refractive index between them is 0.2 or less.

[0035] This configuration allows for the reduction of the diffuse reflection component of light L1 at the interface between the packing layer 50 and the substrate 20, which is a desirable effect. Therefore, the transmittance of light L1 in the light-emitting emblem 13 can be further improved.

[0036] (1-3) The decorative layer 30 has a colored layer 31 containing a pigment and an opacity layer 32 which is provided on the side opposite to the substrate 20 with the colored layer 31 in the front-to-back direction and contains a black pigment that has a higher opacity than the pigment contained in the colored layer 31.

[0037] With this configuration, as shown in Figure 2, visible light (hereinafter referred to as light L3) incident on the front surface 20a from the outside is reflected by the colored layer 31 (see light L4), so that when the light source 12 is not lit, the design surface 13a of the light-emitting emblem 13 is visible from the outside in a color corresponding to the color of the colored layer 31.

[0038] Furthermore, with the above configuration, of the light L3 incident on the front surface 20a from the outside, the light L5 that passes through the colored layer 31 is absorbed by the concealing layer 32. As a result, components such as the light source 12, which are positioned inside (rear in this embodiment) the concealing layer 32, become less visible from the outside. Therefore, the appearance of the light-emitting emblem 13 when the light source 12 is not lit can be improved. Note that, for the sake of explanation, the light L3, L4, and L5 in Figure 2 are examples that do not reflect the refractive indices of the base material 20, colored layer 31, and concealing layer 32.

[0039] <Second Embodiment> Next, with reference to Figure 3, a second embodiment of the vehicle light-transmitting panel will be described. The light-emitting emblem 113 of the second embodiment differs from the light-emitting emblem 13 of the first embodiment in that it has a base material 120 instead of a base material 20.

[0040] The following explanation will focus on the differences from the first embodiment. In the second embodiment, for configurations that are the same as or corresponding to those in the first embodiment, the reference numeral "1**" is added to each reference numeral "**" in the first embodiment, thereby omitting redundant explanations.

[0041] (Base material 120) As shown in Figure 3, the base material 120 has a base material body 121 and a protective layer 122. The base material body 121 is made of a transparent resin material that transmits visible light. As the resin material that forms the base material body 121, for example, an acrylic resin such as polymethyl methacrylate resin (PMMA) or polycarbonate (PC) can be used. In this embodiment, the base material body 121 is made of PC (refractive index: 1.59) and is colorless and transparent. The base material body 121 is positioned on the design surface 113a side. More specifically, the base material body 121 is positioned at the very front of the luminescent emblem 113.

[0042] The protective layer 122 is laminated and bonded to the rear surface 121b of the substrate body 121, which is the surface opposite to the design surface 113a. The protective layer 122 is a resin layer containing an additive 123 that reflects laser light. In this embodiment, the protective layer 122 is a coating film formed by applying a paint in which the additive 123 is dispersed to the rear surface 121b of the substrate body 121. Examples of additives 123 include brightening materials such as glass flakes (average particle size: 40 μm) and metallic conductive fillers such as aluminum flakes (average particle size: 52 μm). The mass concentration of the additive 123 in the protective layer 122 and the film thickness of the protective layer 122 are preferably set to an extent that does not impair the transmission of light L1 in the protective layer 122. For example, when using glass flakes, the mass concentration of the additive 123 in the protective layer 122 is preferably 10% or more and 30% or less. Furthermore, when using aluminum flakes, the mass concentration of additive 123 in the protective layer 122 is preferably 5% to 15%. In all cases, the film thickness of the protective layer 122 is preferably 15 μm to 45 μm. In this embodiment, additive 123 is aluminum flakes.

[0043] <Effects of the second embodiment> According to this embodiment, in addition to the effects (1-1) to (1-3) of the first embodiment, the following additional effect (2-1) can be achieved.

[0044] (2-1) The base material 120 has a base material body 121 and a protective layer 122 which is laminated on the rear surface 121b of the base material body 121, which is the surface opposite to the design surface 113a, and contains an additive 123 that reflects laser light.

[0045] In forming multiple holes 140 by laser processing, a laser beam is irradiated from the concealing layer 132 side onto a laminate in which a colored layer 131 and a concealing layer 132 are sequentially laminated on the rear surface 120b of the base material 120, which is the side opposite to the design surface 113a. As a result, the portion of the decorative layer 130 corresponding to the holes 140 is removed first. In this configuration, a protective layer 122 is laminated on the rear surface 121b of the base material body 121, which is the side opposite to the design surface 113a. Therefore, the laser beam is reflected by the additive 123 in the protective layer 122, making it difficult for the laser beam to be absorbed by the protective layer 122. As a result, the protective layer 122 is difficult to remove by the laser beam, and the portion of the protective layer 122 that constitutes the bottom surface 141a of the holes 140 is less likely to be roughened by the laser beam. In other words, it is difficult for an uneven shape to be formed on the bottom surface 141a of the holes 140. This makes it possible to further reduce the diffuse reflection component at the interface between the filling layer 150 (filling portion 152) and the substrate 120. Therefore, the transmittance of light L1 from the light source 12 in the light-emitting emblem 113 can be further improved.

[0046] <Example of changes> The above embodiment can be implemented with the following modifications. The above embodiment and the following modifications can be combined with each other to the extent that they do not contradict each other technically.

[0047] The concealing layer 32 may be omitted from the decorative layer 30. In other words, the decorative layer 30 may consist only of the colored layer 31. The filling layer 50 is not limited to the colorless and transparent one exemplified in the first embodiment. For example, the filling layer 50 may be a colored and transparent one formed from an acrylic resin containing any coloring agent.

[0048] With this configuration, the packed layer 50 is colored by the pigment. As a result, as shown in Figure 2, the light L2 that passes through the luminescent emblem 13 and is emitted outward changes to a color corresponding to the color of the packed layer 50, more specifically, to a color that is a mixture of the color of the packed layer 50 and the color of light L1. Therefore, the color of light L2 can be changed simply by appropriately changing the type of pigment incorporated into the packed layer 50. Furthermore, the hue of light L2 can be adjusted simply by appropriately adjusting the amount of the pigment incorporated into the packed layer 50. In addition, if a pigment of a complementary color to the color of light L1 of the light source 12 (for example, blue) (for example, yellow) is used as the coloring agent, the color of light L2 can be made achromatic (white) by mixing the color of the packed layer 50 and the color of light L1.

[0049] The base material 20 and the filling layer 50 are not limited to those formed from the resin materials exemplified in the first embodiment, but may also be formed from resin materials in which the difference in refractive index between them is greater than 0.2.

[0050] The luminescent emblem 13 is not limited to having a filling layer 50, and may have only a filling portion 52 by omitting the base layer 51 from the filling layer 50. The luminescent emblem 13 is not limited to the configuration in which the base material 20 is positioned at the very front of the luminescent emblem 13, as illustrated in the first embodiment. For example, a hard coat layer may be further laminated on the front surface 20a of the base material 20.

[0051] The luminous emblem 13 is not limited to transmitting light L1 directly irradiated from the light source 12, as illustrated in this embodiment. For example, it may transmit visible light indirectly irradiated from the light source 12. In other words, the light source 12 does not have to be mounted on the vehicle so as to emit visible light forward. For example, it may be mounted so as to emit visible light backward, or it may be arranged so as to emit visible light along the vertical or vehicle width direction. In this case, a separately arranged light guide or the like can be used to guide the visible light toward the luminous emblem 13.

[0052] The luminous emblem 13 is not limited to being positioned on the front 11 of the vehicle as illustrated in this embodiment. The luminous emblem 13 may be positioned on the rear or side of the vehicle as long as it is positioned outward from the light source. When positioned on the rear, outward from the light source corresponds to the rear in the front-to-back direction, and when positioned on the side, outward from the light source corresponds to the right or left side in the vehicle width direction.

[0053] The light-transmitting panel for vehicles according to the present invention is not limited to the light-emitting emblem 13 that constitutes a part of the exterior panel as exemplified in this embodiment, but can also be embodied as the exterior panel itself. [Explanation of Symbols]

[0054] L1, L2, L3, L4, L5... Light 11...Front part 12...Light source 13,113... Illuminated Emblem 13a, 113a... Design surface 14...Display area 14a... Text section 14b... Ring section 15...Background area 20,120…Base material 20a...Front 20b,120b…Rear side 30,130… Decorative layer 31,131…Colored layer 31b…Rear side 32,132... Concealing layer 32b…Rear side 40,140…Hole 41...bottom 41a, 141a…Bottom surface 50,150…filled bed 51…Base layer 51a...Front 51b…Rear side 52,152…filling section 121...Main body 121b…Rear side 122…Protective layer 123… Additives

Claims

1. A light-transmitting panel for vehicles, positioned outside the light source and constituting part of the vehicle's outer shell, A substrate having visible light transmittance is arranged on the design surface side of the aforementioned vehicle light-transmitting panel, The substrate comprises a decorative layer laminated on the side opposite to the design surface side, The aforementioned vehicle light-transmitting panel has a plurality of holes formed therein, which penetrate the decorative layer in the thickness direction and whose bottom surface is made of the substrate. The bottom surface has an uneven shape formed therein. Multiple of the aforementioned holes are filled with a filler that is transparent to visible light. The substrate and the filling portion are formed of a resin material such that the difference in refractive index between them is smaller than the difference in refractive index between the substrate and air. Light-transmitting panels for vehicles.

2. The substrate and the filling portion are formed from resin materials such that the difference in refractive index between them is 0.2 or less. A light-transmitting panel for a vehicle according to claim 1.

3. The aforementioned filling portion contains a coloring agent. A light-transmitting panel for a vehicle according to claim 1 or claim 2.

4. The decorative layer comprises a coloring layer containing a coloring agent, and an opacity layer provided on the opposite side of the substrate from the coloring layer in the thickness direction, and containing a coloring agent with higher opacity than the coloring agent contained in the coloring layer. A light-transmitting panel for a vehicle according to claim 1 or claim 2.

5. The substrate comprises a substrate body and a protective layer laminated on the side of the substrate body opposite to the design side, and containing an additive that reflects laser light. A light-transmitting panel for a vehicle according to claim 1 or claim 2.

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