Vehicle interior panels

Abstract

To provide an interior panel for a vehicle that extracts light from a light source arranged inside by making it permeate a design surface side, and allows a wide range of expression through a pattern projected on the design surface.SOLUTION: In an interior panel 1 for a vehicle, timing of output change of at least a part of a plurality of light emitting elements 12 is independently controlled, and at least one of a surface 102 of a first member 10 and a surface 112 of a second member 11 is provided with an unevenness, and light emitted from the plurality of light emitting elements 12 is reflected or refracted by the unevenness to arrive at a design surface 15. As a result, a pattern according to the shape of the unevenness is projected.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to an interior panel for a vehicle.

Background Art

[0002] Conventionally, an illumination display device is known that includes a molded product having a light-transmissive decorative film provided on a light-transmissive base material, and a light source disposed on a lower side of the base material, wherein an uneven surface is provided on a lower surface of the base material (see Patent Document 1).

[0003] In the illumination display device described in Patent Document 1, when light from the light source enters the uneven surface of the base material, its traveling direction changes, and then the light transmits through the base material and the light-transmissive decorative film.

Prior Art Literature

Patent Literature

[0004]

Patent Document 1

Summary of the Invention

Problem to be Solved by the Invention

[0005] According to Patent Document 1, since the traveling direction of light incident on the base material changes, it is described that a visual effect in which brightness, design, and the like change depending on the angle at which the molded product is observed can be obtained, but the visual effect provided by the unevenness of the base material does not greatly increase the range of expression.

[0006] An object of the present invention is to provide an interior panel for a vehicle, which transmits and extracts light from an internally arranged light source to a design surface side, and is capable of achieving a wide range of expression by means of a pattern projected onto the design surface.

Means for Solving the Problem

[0007] According to one aspect of the present invention, the following vehicle interior panel is provided to achieve the above object.

[0008] [1] An interior panel for a vehicle on which a pattern can be projected onto a design surface from the inside, comprising: a first plate-shaped member having light transmittance; a second member located on the back side of the first member as seen from the design surface; and a plurality of light-emitting elements that irradiate light from the side into the space between the first member and the second member, wherein the timing of output changes for at least some of the plurality of light-emitting elements is independently controlled; an irregularity is provided on at least one of the first surface of the first member which faces the space and the second surface of the second member which faces the space; and the light emitted from the plurality of light-emitting elements is reflected or refracted by the irregularity and reaches the design surface, thereby projecting a pattern corresponding to the shape of the irregularity. [2] The vehicle interior panel according to [1], wherein the plurality of light-emitting elements constitute a plurality of light-emitting element groups that irradiate the space with light from different directions. [3] The vehicle interior panel according to [1] or [2] above, wherein each of the plurality of light-emitting elements fades in and fades out when it is lit and when it is turned off, respectively. [4] The vehicle interior panel according to [1] or [2] above, wherein both the first surface and the second surface are provided with irregularities. [5] The interior panel for a vehicle according to [4] above, wherein the irregularities provided on the side of the second member facing the space are coarser than the irregularities provided on the side of the first member facing the space. [6] The vehicle interior panel according to [1] or [2] above, wherein the plurality of light-emitting elements include a plurality of groups of light-emitting elements that are positioned in different locations in the thickness direction of the vehicle interior panel. [7] The interior panel for a vehicle according to [1] or [2] above, comprising: a light guide plate arranged in the space; and a second light-emitting element positioned closer to the first member than the plurality of light-emitting elements and facing the side surface of the light guide plate, and irradiating light onto the side surface of the light guide plate, wherein of the first surface and the second surface, only the second surface is provided with irregularities. [Effects of the Invention]

[0009] According to the present invention, it is possible to provide a vehicle interior panel that transmits and extracts light from an internally placed light source to the design surface, and that can express a wide range of designs through patterns projected onto the design surface. [Brief explanation of the drawing]

[0010] [Figure 1] Figures 1(a) and 1(b) are a vertical cross-sectional view and a top view, respectively, of a vehicle interior panel according to the first embodiment of the present invention. [Figure 2] Figures 2(a) and 2(b) are a cross-sectional view and a top view, respectively, of another embodiment of a vehicle interior panel according to the first embodiment of the present invention. [Figure 3] Figures 3(a) and 3(b) are schematic diagrams showing the intensity of light reflected from the uneven surface of the second component in the vehicle interior panel shown in Figure 2(a). [Figure 4] Figure 4 shows an example of the interior of a vehicle equipped with a vehicle interior panel according to the first embodiment of the present invention. [Figure 5] Figure 5 is a vertical cross-sectional view of a vehicle interior panel according to a second embodiment of the present invention. [Figure 6] Figure 6 is a vertical cross-sectional view of a vehicle interior panel according to a third embodiment of the present invention. [Modes for carrying out the invention]

[0011] [First Embodiment] Figures 1(a) and 1(b) are a vertical cross-sectional view and a top view, respectively, of a vehicle interior panel 1 according to the first embodiment of the present invention.

[0012] The vehicle interior panel 1 is a vehicle interior panel on which a pattern can be projected onto a design surface 15 from the inside, and comprises a light-transmitting plate-shaped first member 10, a second member 11 located on the back side of the first member 10 as seen from the design surface 15, a plurality of light-emitting elements 12 that irradiate visible light from the side into the space 16 between the first member 10 and the second member 11, and a light-transmitting film 14 provided on the first member 10.

[0013] Here, the term "lateral" refers to the lateral direction when the direction perpendicular to the design surface 15 of the vehicle interior panel 1 is defined as the thickness direction, that is, the lateral direction in FIG. 1(a).

[0014] In the vehicle interior panel 1, the timing of output change for at least a portion of the plurality of light emitting elements 12 is independently controlled; irregularities are provided on at least one of the surface 102 of the first member 10 on the space 16 side and the surface 112 of the second member 11 on the space 16 side; light emitted from the plurality of light emitting elements 12 is reflected or refracted by the irregularities and reaches the design surface 15, whereby a pattern corresponding to the shape of the irregularities is projected.

[0015] The design surface 15 is a surface on which a design is applied for the vehicle interior panel 1, that is, the surface of the vehicle interior panel 1. For example, as illustrated in FIG. 1, when a film 14 is provided on the outermost surface of the vehicle interior panel 1, the surface of the film 14 serves as the design surface 15.

[0016] Typically, as shown in FIG. 1, the second member 11 has a shape that functions as a housing, and the substrate 13 on which the plurality of light emitting elements 12 are mounted and the first member 10 are fixed to the second member 11.

[0017] The first member 10 is made of a material transparent to visible light emitted by the plurality of light emitting elements 12, for example, a material such as acrylic resin or polycarbonate (PC) resin.

[0018] The first member 10 may have irregularities 101 on the space 16 side. It is preferable that the irregularities 101 are non-uniform irregularities having no periodicity in the irregularity pattern. In this case, the pattern formed by the light refracted by the irregularities 101 and reaching the design surface 15 also becomes a complex pattern with no periodicity.

[0019] The second component 11 is typically made of a material with low visible light transmittance, such as polypropylene (PP) or acrylonitrile-butadiene-styrene (ABS). The second component 11 has lower visible light transmittance than the first component 10.

[0020] The second member 11 may have irregularities 111 on the side facing the space 16. Preferably, the irregularities 111, like the irregularities 101 of the first member 10, have an irregular pattern of irregularities that does not have periodicity. In this case, the pattern formed by the light reflected by the irregularities 111 and reaching the design surface 15 will also be a complex pattern that does not have periodicity.

[0021] In the vehicle interior panel 1, light emitted from multiple light-emitting elements 12 into the space 16 is either directly reflected or reflected by the space 16-facing surface 112 of the second member 11 before entering the space 16-facing surface 102 of the first member 10, passing through the first member 10 and the film 14 and being taken out to the outside. As a result, if the first member 10 has irregularities 101, a pattern of light intensity corresponding to its shape is formed on the design surface 15, and if the second member 11 has irregularities 111, a pattern of light intensity corresponding to its shape is formed on the design surface 15.

[0022] The vehicle interior panel 1 has at least one of the irregularities 101 of the first member 10 and the irregularities 111 of the second member 11, but it is preferable that the vehicle interior panel 1 has both irregularities 101 and irregularities 111, that is, irregularities are provided on both the surface 102 of the first member 10 facing the space 16 and the surface 112 of the second member 11 facing the space 16. In this case, a complex pattern corresponding to the shapes of both irregularities 101 and irregularities 111 is formed on the design surface 15.

[0023] If the vehicle interior panel 1 has both irregularities 101 and irregularities 111, it is preferable that the irregularities 111 are coarser than the irregularities 101. In this case, the irregularities 111 can form a coarse pattern, and the irregularities 101 can form a fine pattern.

[0024] Most of the light emitted from the multiple light-emitting elements 12 is reflected by the irregularities 111 of the second member 11, then refracted by the irregularities 101 of the first member 10, and extracted to the outside. Therefore, a rough pattern can be formed by the irregularities 111 that light can easily reach first, and a fine pattern can be formed by the irregularities 101 that light can easily reach after being reflected by the irregularities 111, thereby creating a detailed pattern on the design surface.

[0025] "Roughness" refers to a surface with large undulations, or large dimensions in the planar direction of the concave and convex parts that make up the surface. The degree of roughness can be compared using a surface roughness value, such as the arithmetic mean roughness Ra.

[0026] Furthermore, since the irregularities 101 and 111 are intended to form a pattern on the design surface 15, they are coarser than the irregularities generally used for uniform surface illumination, which are formed by prism processing, texture processing, dot processing, etc. For example, the average spacing between the protrusions (spacing between the recesses) in the irregularities is on the order of μm for irregularities formed by prism processing, texture processing, dot processing, etc., whereas it is 1 mm or more for the irregularities 101 and 111.

[0027] The multiple light-emitting elements 12 are typically LED (Light Emitting Diode) chips, but are not limited to these; for example, they may be LD (Laser Diode) chips. The light-emitting colors of the multiple light-emitting elements 12 are not particularly limited, and they may be elements capable of emitting multiple colors, such as full-color LEDs. The multiple light-emitting elements 12 are mounted on a substrate 13, such as a printed circuit board.

[0028] As described above, in the vehicle interior panel 1, the timing of output changes for at least some of the multiple light-emitting elements 12 is controlled independently, for example, the timing of output changes for all of the light-emitting elements 12 is controlled independently.

[0029] The irregularities 101 of the first member 10 and the irregularities 111 of the second member 11 form different patterns on the design surface 15 depending on the position of the light source. Therefore, by independently controlling the timing of output changes for at least some of the light-emitting elements 12, and changing the timing of output changes for light-emitting elements 12 located at different positions, the pattern formed on the design surface 15 can be changed over time. This makes it possible, for example, to create a wavering pattern (wavering effect).

[0030] In particular, when the irregularities 101 and 111 have non-periodic and uneven patterns, the change in the pattern due to the difference in the position of the light source becomes larger, and therefore the change in the pattern over time due to changing the timing of the output change of the light-emitting elements 12, which are placed at different positions, becomes even larger.

[0031] Independently controlling the timing of output changes typically involves independently controlling the timing of turning on (changing the output from 0 to a predetermined level) and turning off (changing the output from a predetermined level to 0). For example, the light-emitting elements 12 can be made to light up one by one or in predetermined numbers in sequence, or they can be made to light up randomly.

[0032] When switching on and off as the output change for each of the multiple light-emitting elements 12, it is preferable to have a fade-in and fade-out effect when switching on and when switching off, respectively. This makes it possible to control the timing of switching on and off for at least some of the multiple light-emitting elements 12 independently, resulting in a smoother change in the pattern formed on the design surface 15 over time.

[0033] Furthermore, when each of the multiple light-emitting elements 12 is to fade in and fade out when turned on and off, respectively, it is preferable that at least one of the light-emitting elements 12 is always in a light-emitting state while the multiple light-emitting elements 12 are operating. In that case, the timing of the light emission of one light-emitting element 12 and the timing of the light emission of the next light-emitting element 12 overlap, which makes the change in the pattern formed on the design surface 15 over time even smoother.

[0034] Furthermore, not only the timing of output changes, but also the maximum output value (maximum brightness) of at least some of the light-emitting elements 12 may be controlled independently. This makes it possible to increase the temporal changes in the pattern formed on the design surface 15.

[0035] It is preferable that the multiple light-emitting elements 12 be arranged along the outer periphery of the planar shape of the vehicle interior panel 1, as shown in Figures 1(a) and (b), in order to illuminate as wide an area as possible in the space 16 between the first member 10 and the second member 11 from the side. The number and arrangement of the multiple light-emitting elements 12 can be appropriately selected according to the planar shape and size of the vehicle interior panel 1.

[0036] Figure 1(b) is a top view of the vehicle interior panel 1 when its planar shape is rectangular. The cross-section of the vehicle interior panel 1 shown in Figure 1(a) is formed by cutting along the cutting line AA in Figure 1(b). In Figure 1(b), the installation positions of the multiple light-emitting elements 12 are indicated by dotted lines.

[0037] In the examples shown in Figures 1(a) and 1(b), multiple light-emitting elements 12 form a group of light-emitting elements arranged along one side of the planar shape of the vehicle's interior panel 1. In order to efficiently irradiate the entire space 16 with light, it is preferable to configure a group of light-emitting elements, as illustrated in Figures 1(a) and 1(b), in which multiple light-emitting elements 12 are arranged along one or more sides of the planar shape of the vehicle's interior panel 1.

[0038] If the group of light-emitting elements includes multiple light-emitting elements 12 arranged along one side of the planar shape of the vehicle's interior panel 1, then, for example, the light-emitting elements 12 can be made to light up sequentially in the order they are arranged, or they can be made to light up randomly.

[0039] Although the planar shape of the vehicle interior panel 1 shown in Figure 1(b) is rectangular, the planar shape of the vehicle interior panel 1 is not particularly limited and can take a shape according to the shape of the place where the vehicle interior panel 1 is applied (for example, a door trim or instrument panel). For this reason, the sides of the planar shape of the vehicle interior panel 1 may be curved, in which case, for example, the light-emitting elements 12 may be arranged along the curve.

[0040] Figures 2(a) and 2(b) show a cross-sectional view and a top view of the vehicle interior panel 1 when multiple light-emitting elements 12 constitute two groups of light-emitting elements, each arranged along two sides of the vehicle interior panel 1 with different planar shapes. Figure 2(b) is a top view when the planar shape of the vehicle interior panel 1 is rectangular. The cross-section of the vehicle interior panel 1 shown in Figure 2(a) is formed by cutting along the cutting line BB in Figure 2(b).

[0041] In the vehicle interior panel 1 shown in Figure 2(a), the light-emitting elements 12 that constitute a group of light-emitting elements arranged along one side of the planar shape are referred to as light-emitting elements 12a, and the light-emitting elements 12 that constitute a group of light-emitting elements arranged along the other side are referred to as light-emitting elements 12b.

[0042] Figure 3(a) is a schematic diagram showing the intensity of light reflected from the uneven surface 111 of the second member 11 at different locations when the light-emitting element 12a is lit in the vehicle interior panel 1 shown in Figure 2(a). Figure 3(b) is a schematic diagram showing the intensity of light reflected from the uneven surface 111 of the second member 11 at different locations when the light-emitting element 12b is lit in the vehicle interior panel 1 shown in Figure 2(a).

[0043] As shown in Figures 3(a) and 3(b), a lot of light is reflected from the portion of the irregularities 111 of the second member 11 that faces the side of the illuminated light-emitting element 12. Therefore, the portion where a lot of light is reflected when the light-emitting element 12a is lit is significantly different from the portion where a lot of light is reflected when the light-emitting element 12b, which is located on a different side from the light-emitting element 12a, is lit. As a result, the pattern formed on the design surface 15 when the light-emitting element 12a is lit is significantly different from the pattern formed on the design surface 15 when the light-emitting element 12b, which is located on a different side from the light-emitting element 12a, is lit.

[0044] Therefore, as shown in Figures 2(a) and (b), the case in which multiple light-emitting elements 12 are arranged along two different sides of the planar shape of the vehicle's interior panel 1 results in a greater change over time in the pattern caused by changing the timing of output changes of the light-emitting elements 12 located at different positions, compared to the case in which multiple light-emitting elements 12 are arranged along one side of the planar shape of the vehicle's interior panel 1 to form a group of light-emitting elements 12 arranged along one side of the planar shape of the vehicle's interior panel 1.

[0045] In the examples shown in Figures 2(a) and (b), two groups of light-emitting elements are arranged on opposite sides, but the arrangement of the two groups of light-emitting elements is not limited to this. If the direction of light emitted from the two groups of light-emitting elements is different, the change in the pattern over time can be made greater by changing the timing of output changes of the light-emitting elements 12 arranged at different positions than when multiple light-emitting elements 12 constitute a single group of light-emitting elements.

[0046] Furthermore, the greater the number of light-emitting groups that illuminate the space 16 from different directions, the greater the change in the pattern over time by changing the timing of output changes of the light-emitting groups 12 arranged at different positions. For example, as illustrated in Figures 1(b) and 2(b), if the planar shape of the vehicle interior panel 1 is rectangular, it is preferable to arrange light-emitting groups on each of the four sides of the rectangle.

[0047] Thus, it is preferable that the multiple light-emitting elements 12 constitute multiple groups of light-emitting elements that irradiate the space 16 with light from different directions.

[0048] Multiple light-emitting elements 12 are connected to a control unit that controls the light-emitting operation of the multiple light-emitting elements 12, and emit light in response to a light-emitting instruction signal from the control unit. The control unit is a microcomputer composed of, for example, a CPU (Central Processing Unit) that performs calculations and processing on acquired data according to a stored program, and semiconductor memories such as RAM (Random Access Memory) and ROM (Read Only Memory). The ROM stores, for example, a program for the operation of the control unit. The RAM is used, for example, as a storage area for temporarily storing calculation results. The control unit may be located inside the vehicle interior panel 1, for example on a circuit board 13, or it may be located outside the vehicle interior panel 1, for example in an on-board ECU (Electronic Control Unit).

[0049] The control unit can, for example, control the illumination operation of multiple light-emitting elements 12 in response to instructions from the occupants via switches or other means, or to changes in the operating state of the vehicle, such as starting or unlocking the drive system.

[0050] The film 14 is made of a material that is transparent to the visible light emitted by the multiple light-emitting elements 12, such as an acrylic resin. The film 14 may be colorless or colored, and may also be decorated with a wood grain pattern or the like. If it is decorated, even when the light-emitting elements 12 are not emitting light, the pattern on the film 14 can be seen when light from outside the vehicle's interior panel 1, such as ambient light, shines on the film 14.

[0051] Figure 4 shows an example of the interior of a vehicle 9 on which the vehicle interior panel 1 is installed. The vehicle interior panel 1 can be attached to parts such as the door trim 91 of the driver's seat 90a and passenger seat 90b doors, the door trim 93 of the rear seat 92 doors, and the instrument panel 94. In Figure 4, examples of areas on which the vehicle interior panel 1 is installed are shown in gray. The design surface 15 of the vehicle interior panel 1 becomes part of the surface of the part on which the vehicle interior panel 1 is installed.

[0052] [Second Embodiment] The second embodiment differs from the first embodiment in that multiple light-emitting elements are arranged in a row in the thickness direction of the vehicle's interior panel. Note that descriptions of parts similar to those in the first embodiment are omitted or simplified. Furthermore, parts having the same function and configuration as the first embodiment are denoted by the same reference numerals as in the first embodiment.

[0053] Figure 5 is a vertical cross-sectional view of a vehicle interior panel 2 according to a second embodiment of the present invention. The vehicle interior panel 2 includes a plurality of light-emitting elements 21 and a plurality of light-emitting elements 22 that irradiate the space 16 with visible light from the side, similar to the plurality of light-emitting elements 12 included in the vehicle interior panel 1.

[0054] Multiple light-emitting elements 21 and multiple light-emitting elements 22 are positioned at different locations in the thickness direction of the vehicle interior panel 2. Here, "thickness direction" refers to the direction perpendicular to the design surface 15 of the vehicle interior panel 1, that is, the vertical direction in Figure 5.

[0055] LED chips or LD chips are used for the light-emitting elements 21 and 22, similar to the light-emitting elements 12 included in the vehicle interior panel 1. The number of multiple light-emitting elements 21 and 22, as well as their positions in the planar direction, can be set in the same way as the light-emitting elements 12 included in the vehicle interior panel 1. Furthermore, the number of multiple light-emitting elements 21 and 22, as well as their positions in the planar direction, may be the same or different.

[0056] Because the multiple light-emitting elements 21 and 22 are positioned differently in the thickness direction of the vehicle interior panel 2, even if the positions of the multiple light-emitting elements 21 and 22 are the same in the planar direction, the distances and angles from the irregularities 101 of the first member and the irregularities 111 of the second member 11 are different.

[0057] Therefore, the pattern formed on the design surface 15 when multiple light-emitting elements 21 are illuminated is different from the pattern formed on the design surface 15 when multiple light-emitting elements 22 are illuminated. By changing the timing of the output changes of the light-emitting elements 21 and 22, the pattern formed on the design surface 15 can be changed significantly over time. As a result, the change in the pattern formed on the design surface 15 over time can be made greater compared to the case where the positions of the multiple light-emitting elements in the thickness direction are constant.

[0058] The vehicle interior panel 2 may further include a plurality of light-emitting elements 21 and a plurality of light-emitting elements 22, and a plurality of light-emitting elements that are positioned at different locations in the thickness direction of the vehicle interior panel 2. That is, the vehicle interior panel 2 may include a plurality of groups of light-emitting elements that are positioned at different locations in the thickness direction of the vehicle interior panel 2.

[0059] [Third Embodiment] The third embodiment differs from the first embodiment in that a light guide plate and a light source for the light guide plate are included inside the interior panel of the vehicle. Note that descriptions of parts similar to those in the first embodiment are omitted or simplified. Furthermore, parts having the same function and configuration as the first embodiment are denoted by the same reference numerals as in the first embodiment.

[0060] Figure 6 is a vertical cross-sectional view of a vehicle interior panel 3 according to a third embodiment of the present invention. The vehicle interior panel 3 comprises a first member 10, a second member 11, a plurality of light-emitting elements 12, a substrate 13, and a film 14, as well as a light guide plate 31 arranged in a space 16, and a second light-emitting element 32 positioned closer to the first member 10 than the plurality of light-emitting elements 12, facing the side surface 311 of the light guide plate 31, and irradiating the side surface 311 of the light guide plate 31 with visible light.

[0061] In the vehicle interior panel 3, of the surface 102 of the first member 10 facing the space 16 and the surface 112 of the second member 11 facing the space 16, only surface 112 has irregularities.

[0062] In the vehicle interior panel 3, when multiple light-emitting elements 12 are illuminated, the light reflected by the irregularities 111 provided on the surface 112 of the second member 11 facing the space 16 passes through the light guide plate 31, the first member 10, and the film 14 to reach the design surface 15, thereby forming a pattern on the design surface 15 that corresponds to the shape of the irregularities 111.

[0063] On the other hand, when the second light-emitting element 32 is illuminated, the light emitted from the second light-emitting element 32 enters the interior of the light guide plate 31 from the side surface 311 of the light guide plate 31 and propagates inside the light guide plate 31. Then, much of the light extracted from the surface 312 of the light guide plate 31 on the side of the first member 10 is not reflected by the irregularities 111 of the second member 11, but passes through the first member 10 and the film 14 to reach the design surface 15, so that the design surface 15 emits light almost uniformly.

[0064] The light guide plate 31 is made of a material that is transparent to the visible light emitted by the light-emitting element 12 and the second light-emitting element 32, such as an acrylic resin or PC resin. The surface 313 of the light guide plate 31 on the side of the second member 11 may be provided with irregularities to reflect light propagating inside the light guide plate 31 at an angle that makes it easy to extract from the surface 312.

[0065] Similar to the light-emitting element 12, LED chips or LD chips are used for the second light-emitting element 32. The shape and size of the light guide plate 31, as well as the number of second light-emitting elements 32 and their arrangement on the side of the light guide plate 31, can be appropriately selected according to the planar shape and size of the vehicle interior panel 1.

[0066] According to the vehicle interior panel 3, for example, the pattern formed on the design surface 15 when the light-emitting element 12 is illuminated and the pattern formed on the design surface 15 when the second light-emitting element 32 is illuminated can be used interchangeably depending on the mood of the vehicle occupant 9. For example, when you want to relax at night, you can illuminate the light-emitting element 12 to display a flickering pattern on the design surface 15 (relaxation mode), and when you are in a heightened mood during the day, you can illuminate the second light-emitting element 32 to make the design surface 15 emit light (exhilaration mode).

[0067] (Effects of the embodiment) According to the vehicle interior panels 1 to 3 of the above-described embodiment of the present invention, by using multiple light-emitting elements whose output change timing can be independently controlled, and by reflecting or refracting light off the internally provided irregularities before extraction, the pattern formed on the design surface can be changed over time. This makes it possible to express a wider range of designs compared to designs that do not change over time.

[0068] Although embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and various modifications can be made without departing from the spirit of the invention. Furthermore, the components of the above embodiments can be arbitrarily combined without departing from the spirit of the invention.

[0069] Furthermore, the above embodiments do not limit the invention as defined in the claims. It should also be noted that not all combinations of features described in the embodiments are necessarily essential for solving the problem of the invention. [Explanation of Symbols]

[0070] 1, 2, 3 Interior panels for vehicles 10 First member 101 Unevenness 102 sides 11 Second member 111 Unevenness 112 sides 12, 21, 22 Light-emitting elements 15. Design surface 16 Space 31 Light guide plate 32 Second light-emitting element

Claims

1. A vehicle interior panel on which a pattern can be projected onto the design surface from the inside, A first plate-shaped member having light-transmitting properties, A second member located on the back side of the first member when viewed from the design surface, A plurality of light-emitting elements that irradiate light from the side into the space between the first member and the second member, Equipped with, In the plurality of light-emitting elements, the timing of at least some of the output changes is controlled independently. Both the first surface of the first member, which is the surface facing the space, and the second surface of the second member, which is the surface facing the space, are provided with irregularities. Light emitted from the plurality of light-emitting elements is reflected or refracted by the irregularities and reaches the design surface, thereby projecting the pattern corresponding to the shape of the irregularities. Vehicle interior panels.

2. A vehicle interior panel on which a pattern can be projected onto the design surface from the inside, A first plate-shaped member having light-transmitting properties, A second member located on the back side of the first member when viewed from the design surface, The vehicle interior panel includes a plurality of groups of light-emitting elements that are positioned at different locations in the thickness direction, and which irradiate light from the side into the space between the first member and the second member, Equipped with, In the plurality of light-emitting elements, the timing of at least some of the output changes is controlled independently. An irregularity is provided on at least one of the first surface of the first member which is the surface facing the space and the second surface of the second member which is the surface facing the space. Light emitted from the plurality of light-emitting elements is reflected or refracted by the irregularities and reaches the design surface, thereby projecting the pattern corresponding to the shape of the irregularities. Vehicle interior panels.

3. A vehicle interior panel on which a pattern can be projected onto the design surface from the inside, A first plate-shaped member having light-transmitting properties, A second member located on the back side of the first member when viewed from the design surface, A plurality of light-emitting elements that irradiate light from the side into the space between the first member and the second member, A light guide plate arranged in the aforementioned space, A second light-emitting element is positioned closer to the first member than the plurality of light-emitting elements, facing the side surface of the light guide plate, and irradiates light onto the side surface of the light guide plate. Equipped with, In the plurality of light-emitting elements, the timing of at least some of the output changes is controlled independently. Of the first surface of the first member which faces the space and the second surface of the second member which faces the space, only the second surface is provided with irregularities. Light emitted from the plurality of light-emitting elements is reflected or refracted by the irregularities and reaches the design surface, thereby projecting the pattern corresponding to the shape of the irregularities. Vehicle interior panels.

4. The plurality of light-emitting elements constitute a plurality of light-emitting element groups that irradiate the space with light from different directions. The interior panel for a vehicle according to any one of claims 1 to 3.

5. Each of the aforementioned multiple light-emitting elements fades in and fades out when it is turned on and when it is turned off, respectively. The interior panel for a vehicle according to any one of claims 1 to 3.

6. The irregularities provided on the side of the second member facing the space are coarser than the irregularities provided on the side of the first member facing the space. The interior panel for a vehicle according to claim 1.

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