JP2020019441A - Illumination panel for vehicle and its manufacturing method - Google Patents

Abstract

To make a transmitted illumination part mainly possess a three dimensional appearance or the like.SOLUTION: This invention relates to an illumination panel for a vehicle which is composed of a light shielding panel part 3 having a transmitted illumination part 2. The panel part 3 comprises a constitution in which at least a light shielding layer 12, a decorative layer 13 and top coat layers 14 are sequentially formed on a surface of a transparent panel base material 11. The transmitted illumination part 2 is formed of recesses 15 which are formed on the surface of the panel base material 11. The light shielding layer 12 and the decorative layer 13 are formed at portions 16 other than the recesses 15 of the surface of the panel base material 11. The recesses 15 are formed with the top coat layers 14 therein.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a vehicle lighting panel and a method for manufacturing the same.

  2. Description of the Related Art A vehicle such as an automobile includes an interior panel such as an instrument panel at a front portion in a vehicle interior. Some of such interior panels have a lighting function (vehicle lighting panel) (for example, see Patent Document 1).

JP 2018-34762 A

  However, the above-mentioned vehicle lighting panel has a problem that the three-dimensional appearance of a lighting part is poor.

  Therefore, an object of the present invention is mainly to solve the above-mentioned problems.

In order to solve the above problems, the present invention provides:
In a vehicle lighting panel including a light-shielding panel portion having a transmission lighting portion,
The panel portion, on the surface of a transparent panel substrate, at least, a light-shielding layer, a decorative layer, comprising a configuration in which a top coat layer is formed in order,
The transmission illumination unit is formed by a concave portion provided on the surface of the panel base material,
The light-shielding layer and the decorative layer are formed in a portion other than the concave portion on the surface of the panel base material,
The concave portion has the top coat layer formed therein.

  According to the present invention, with the above-described configuration, it is possible to give the transmitted illumination unit a three-dimensional effect or the like.

1 is an overall plan view of a vehicle lighting panel according to the present embodiment. It is a longitudinal cross-sectional view of the transmission illumination part of FIG. FIG. 3 is a diagram illustrating a state in which a light shielding layer (print layer, pad print layer) is formed. Of these, (a) is before transfer, (b) is during transfer, and (c) is after transfer. It is a figure showing the state where a decoration layer (print layer, pad print layer) is formed. Of these, (a) is before transfer, (b) is during transfer, and (c) is after transfer. FIG. 3 is a diagram showing a state in which a top coat layer (coating layer) is formed. Of these, (a) is before application and (b) is after application. It is a longitudinal cross-sectional view of the transmission illumination part concerning the modification of FIG. It is a longitudinal cross-sectional view of the transmission lighting part in the vehicle lighting panel manufactured by sticking the film concerning a comparative example.

Hereinafter, the present embodiment will be described in detail with reference to the drawings.
1 to 7 are for describing this embodiment.

  <Structure> The structure of this embodiment will be described below.

  2. Description of the Related Art A vehicle such as an automobile includes an interior panel (vehicle interior panel) such as an instrument panel at a front portion in a vehicle interior. As shown in FIG. 1, such an interior panel is a lighting panel 1 (vehicle lighting panel) having a lighting function.

  The lighting panel 1 is composed of a light-shielding panel section 3 having a transmission lighting section 2.

  Here, in addition to the instrument panel described above, for example, various sub-panels attached to the instrument panel, a center console provided between the driver's seat and the passenger seat, There are various sub-panels attached to the center console, door panels, various sub-panels attached to the door panel, and other panels. These interior panels can be used as lighting panels 1 as needed.

  The illumination panel 1 is configured to partially illuminate the transmission illumination unit 2 provided in the panel unit 3 by illuminating a light source arranged on the back surface side. For this purpose, the illumination panel 1 is configured such that the transmissive illumination unit 2 is partially provided in the plane of the light-shielding panel unit 3. One or more transmissive illumination units 2 are provided for the panel unit 3.

  The transmitted illumination unit 2 can be, for example, a decorative pattern or a display unit that indicates the function of the vehicle. When the transmissive illumination unit 2 is used as a display unit, the display unit may be, for example, a pattern such as a character or a figure indicating a function such as an air conditioner or an audio switch. Further, by arranging a pressure-sensitive switch or the like on the back side of the display unit (transmitted illumination unit 2), the transmitted illumination unit 2 can be used as a switch operation unit or the like. The lighting panel 1 having a switch operation unit such as an air conditioner or an audio is disposed, for example, in a portion (center portion) between a driver's seat and a passenger seat of an instrument panel. However, the specific application and arrangement of the lighting panel 1 are not limited to the above.

  On the other hand, in this embodiment, the following configuration is provided.

(1) As shown in FIG. 2, the panel unit 3 has a configuration in which at least a light shielding layer 12, a decorative layer 13, and a top coat layer 14 are sequentially formed on the surface of a transparent panel base material 11. To do.
Then, the transmitted illumination unit 2 is formed in a concave portion 15 provided on the surface of the panel substrate 11.
The light-shielding layer 12 and the decorative layer 13 are formed in a portion 16 other than the concave portion 15 on the surface of the panel substrate 11.
The recess 15 has the top coat layer 14 formed therein.

  Here, the panel base material 11 is formed of a transparent or translucent resin. The panel substrate 11 is preferably formed of a relatively hard resin so as to have shape retention properties by itself (for example, polycarbonate, acrylic, PP material, PVC material, etc.). The panel substrate 11 is thicker than the depth of the recess 15 (for example, about 3 mm to 5 mm or more). When the transmissive illumination unit 2 is used as a switch operation unit, the panel substrate 11 is made flexible so that the panel substrate 11 is slightly elastically deformed (about a switch stroke) by pushing the transmissive illumination unit 2. It may have properties.

  The light-shielding layer 12 is a layer having a light-shielding property, and may be, for example, a layer of black or dark color having a transmittance of almost 0%. Therefore, the panel portion 3 is provided with the light-shielding layer 12 (the portion 16 other than the concave portion 15) and is shielded from light. The light-shielding layer 12 is preferably a layer having a substantially uniform thickness.

  The decorative layer 13 is a layer for decorating the surface of the lighting panel 1, and may be, for example, a layer having a color such as a woodgrain tone or a pattern (a woodgrain pattern). However, the decorative layer 13 is not limited to the woodgrain, and may be, for example, a metal tone or a carbon pattern. The decorative layer 13 is preferably a layer having a substantially uniform thickness.

  The top coat layer 14 is a protective layer made of a transparent or translucent resin, and is formed on the uppermost layer (on the light shielding layer 12 and the decorative layer 13) of the panel section 3 to protect the surface of the panel section 3. Is done. The top coat layer 14 is preferably a layer having a substantially uniform thickness. In this embodiment, the top coat layer 14 is formed directly inside the recess 15. The top coat layer 14 is formed in the concave portion 15 and the portion 16 other than the concave portion 15.

  In addition, in this embodiment, the panel unit 3 is configured by three layers of the light shielding layer 12, the decorative layer 13, and the top coat layer 14. However, the present invention is not limited to this. For example, as described later, Layers other than these three layers may be provided.

  The surface of the panel substrate 11 is a surface (outer surface) on the side exposed to the outside of the panel substrate 11, and includes a portion 16 (first portion) other than the concave portion 15 and a concave portion 15 (second portion). And

  The concave portion 15 simulates an engraved pattern, and is formed on the surface of the panel base material 11 in order to give the lighting panel 1 and the transmissive lighting portion 2 a three-dimensional appearance and a craft-like texture. The recess 15 is formed to make the panel section 3 look as if it were made of a real material. The recess 15 can be formed at the same time as, for example, injection molding the panel base material 11. Alternatively, the concave portion 15 can be engraved on the panel base material 11 by post-processing, for example. The width and depth of the concave portion 15 are basically made to look like an engraved pattern, but the concave portion 15 is generally about 0.3 mm to 2.0 mm, preferably 0.5 mm to 1.0 mm. It has a width and a depth. However, the width and depth of the recess 15 are not limited to the above.

  The portion 16 of the panel base material 11 other than the concave portion 15 forms a general surface (design surface) of the lighting panel 1 and may be a free-form surface or a flat surface.

(2) As shown in FIGS. 3 and 4, the light-shielding layer 12 and the decorative layer 13 may be a print layer 21.
As shown in FIG. 5, the top coat layer 14 may be a coating layer 22.

  Here, the printing layer 21 is a layer formed by printing. The print layer 21 can be formed by, for example, fluid printing (or hydraulic transfer). In the fluid printing, in short, a water-soluble film on which a pattern to be transferred (decorative layer 13) is printed is floated on water, and the pattern is transferred to the object by pressing the object (panel base material 11) against the film floating on the water. This is a special printing method. The object to which the pattern has been transferred is then washed off and dried. At this time, the symbol is removed from above the concave portion 15. Then, the dried design is protected by the top coat layer 14. As a result, the design is fixed on the object.

  The coating layer 22 is a layer formed by coating. The top coat layer 14 formed of the coating layer 22 may be formed by any coating method as long as it can be inserted into the recess 15, but is preferably formed by, for example, spray coating. Since the spray coating sprays a coating liquid (top coat layer 14) from a nozzle 23, the coating layer 22 follows the concave portion 15, so that it is suitable for forming the top coat layer 14 inside the concave portion 15. I have.

  (3) As shown in FIGS. 3 and 4, the print layer 21 may be a pad print layer 31.

  Here, as long as the printing layer 21 does not enter the inside of the recess 15, any printing method may be used, but the pad printing layer 31 is preferably used. In short, pad printing is a printing method in which ink is transferred like a stamp by pressing silicone rubber pads 32 and 33 on which ink (light-shielding layer 12 and decorative layer 13) is placed on an object. In the pad printing, the hardness and thickness of the pads 32 and 33 can be adjusted so as not to follow the recess 15, so that printing can be performed without considering the presence of the recess 15. This is one of the most suitable printing methods for printing the decorative layer 13. When pad printing is performed, the width and depth of the recess 15 are set to optimal values according to the hardness and thickness of the pads 32 and 33 so that ink does not adhere inside the recess 15. In addition, pad printing can be printed on a large object and also on a free-form surface, so that it is suitable for printing on the panel base material 11 used for the lighting panel 1 for a vehicle.

(4) As shown in FIG. 6, as a modified example of the vehicle lighting panel, a colored layer 41 may be provided between the light shielding layer 12 and the decorative layer 13.
The coloring layer 41 may be the coating layer 22.

  Here, the coloring layer 41 is for coloring the inside of the recess 15. The coloring layer 41 is preferably a layer having a substantially uniform thickness. The coloring layer 41 may have any color, but preferably has a color that matches the decorative layer 13. For example, when the decorative layer 13 has a woodgrain, the colored layer 41 preferably has the same color as the decorative layer 13 (for example, a brown or beige tree color). For example, when the decorative layer 13 has a metallic tone, it is preferable that the colored layer 41 has the same metallic color as the decorative layer 13. For example, when the decorative layer 13 has a carbon pattern, it is preferable that the colored layer 41 be of the same type of color as the decorative layer 13 (eg, black or gray). It is preferable that the coloring layer 41 has substantially the same brightness as the decorative layer 13 or a color slightly darker than the decorative layer 13 so that the concave portion 15 is not conspicuous from the outside.

  Conversely, the colored layer 41 may be a color that is conspicuous from the outside, such as white, black, or red.

  When there are a plurality of concave portions 15, the colored layers 41 may have different colors.

  However, regardless of the color of the colored layer 41, the colored layer 41 is capable of transmitting illumination. At this time, the coloring layer 41 may have a transmittance for optimizing the luminance of the transmitted illumination (a transmittance adjusting layer). In this case, the transmittance of the colored layer 41 can be appropriately adjusted in a range greater than 0% and less than 100%. It is preferable that the transmittance of the colored layer 41 is appropriately set to a value within a range of 30% to 80%.

  Further, the coloring layer 41 may be formed as a light diffusion layer by dispersing and mixing light diffusion particles and the like.

  The coloring layer 41 of the coating layer 22 may be formed by spray coating as in the case of the top coat layer 14, although any coating method may be used as long as the coloring layer 41 can enter the inside of the concave portion 15. The spray coating follows the recess 15 and is therefore suitable for forming the colored layer 41 inside the recess 15. In this modification, the coloring layer 41 is formed directly inside the recess 15. Then, the top coat layer 14 is formed on the coloring layer 41.

  (5) Hereinafter, a method for manufacturing the above-described vehicle lighting panel will be described.

In the method of manufacturing the vehicle lighting panel, the transmissive lighting unit 2 is provided on the light-shielding panel unit 3.
As a vehicle lighting panel, at least a light-shielding layer 12, a decorative layer 13, and a top coat layer 14 are sequentially formed on the surface of a transparent panel base material 11 to form a panel portion 3.
At this time, the transmission illumination unit 2 is formed by providing the concave portion 15 on the surface of the panel substrate 11 (recess forming step).
Next, as shown in FIG. 3, a light-shielding layer 12 is formed in a portion 16 other than the concave portion 15 on the surface of the panel base material 11 (light-shielding layer forming step).
Next, as shown in FIG. 4, the decorative layer 13 is formed in a portion 16 other than the concave portion 15 on the surface of the panel substrate 11 (decorative layer forming step).
Then, as shown in FIG. 5, the top coat layer 14 is formed inside the recess 15 (top coat layer forming step).

  (6) As a modified example of the method for manufacturing a vehicle lighting panel, a colored layer 41 may be provided between the light shielding layer 12 and the decorative layer 13 (colored layer forming step). At this time, the coloring layer 41 may be formed inside the recess 15.

  Here, the colored layer forming step of providing the colored layer 41 is performed between the light shielding layer forming step and the decorative layer forming step. The colored layer forming step can be performed in the same manner as the top coat layer forming step. After the decorative layer forming step, the top coat layer forming step is performed so that the top coat layer 14 is formed on the decorative layer 13 in the portions 16 other than the concave portions 15, and the colored portions are formed in the concave portions 15. The top coat layer 14 is formed on the layer 41.

  <Operation> The operation of this embodiment will be described below.

  The illumination panel 1 (for a vehicle) can illuminate the transmissive illumination unit 2 by providing the light-shielding panel unit 3 with the transmissive illumination unit 2. Thereby, the decorative effect of the vehicle lighting panel can be enhanced, or the display unit can be illuminated by using the transmissive lighting unit 2 as the display unit.

  The panel portion 3 has a configuration in which at least a light shielding layer 12, a decorative layer 13, and a top coat layer 14 are sequentially formed on the surface of a transparent panel base material 11, so that the panel portion 3 3 can be made light-shielding as a whole, so that the illumination of the transmission illumination unit 2 partially provided in the panel unit 3 can be emphasized. Further, the panel portion 3 can be decorated by the decoration layer 13. The decorative layer 13 and the like can be protected by the top coat layer 14.

  <Effects> According to this embodiment, the following effects can be obtained.

  (Effect 1) The transmitted illumination unit 2 is formed in the concave portion 15 provided on the surface of the panel substrate 11. Thereby, the lighting panel 1 and the transmissive lighting unit 2 can be given a three-dimensional appearance and a craft-like texture by the recess 15. In addition, since the presence of the concave portion 15 gives the decorative layer 13 a sense of material, the panel portion 3 can be seen as if it were made of a real material. Therefore, the quality of the lighting panel 1 can be improved.

  The light-shielding layer 12 and the decorative layer 13 were formed in a portion 16 other than the concave portion 15 on the surface of the panel substrate 11. Thereby, the outline of the concave portion 15 (the transmitted illumination section 2) can be clarified.

  At this time, for example, as shown in the comparative example of FIG. 7, the light-shielding layer 12 and the decorative layer It is conceivable that the lighting panel 1 is manufactured by forming the recesses 13, but in this case, the recesses 15 are closed by the film 51 between the recesses 15 and the light-shielding layer 12 and the decorative layer 13, and the cavity is formed. 52 will be formed. Therefore, the light shielding layer 12 and the decorative layer 13 become unstable due to the cavity 52, and the light shielding layer 12 and the decorative layer 13 may be distorted or broken.

  Therefore, the light shielding layer 12 and the decorative layer 13 are eliminated from the upper side of the recess 15. Thus, the above-described problem caused by the cavity 52 can be eliminated. That is, the cavity 15 is formed between the concave portion 15 and the light-shielding layer 12 or the decorative layer 13 because the concave portion 15 serving as the transmission illumination unit 2 does not have the light-shielding layer 12 and the decorative layer 13 on the upper side. Disappears. Therefore, the light shielding layer 12 and the decoration layer 13 are stabilized. When the light-shielding layer 12 and the decorative layer 13 are stable, the concave portion 15 has a stable shape, and the shape reproducibility of the concave portion 15 is improved. Furthermore, when the illumination light is applied from the back side of the panel section 3, only the concave portion 15 can be illuminated accurately.

  Then, the top coat layer 14 was applied inside the recess 15. This allows the top coat layer 14 to effectively protect the recess 15 (the transmitted illumination section 2).

  (Effect 2) The light shielding layer 12 and the decoration layer 13 may be the printing layer 21. Since the printing layer 21 does not follow the recess 15 and does not enter the inside of the recess 15, the recess 15 without the light shielding layer 12 and the decorative layer 13 on the upper side can be easily formed.

  The top coat layer 14 may be the coating layer 22. Since the coating layer 22 follows the recess 15, the coating layer 22 can enter the inside of the recess 15. Therefore, the top coat layer 14 is applied to the inside of the recess 15, and the top coat layer 14 forms the recess 15 (the transmission illumination section 2). ) Can be reliably protected.

  After the light-shielding layer 12 and the decorative layer 13 are formed on the surface of the panel base material 11 where the concave portions 15 are not formed by attaching a film 51 or the like, the concave portions 15 to be the transmissive illumination portions 2 are formed by laser processing. At the same time, by removing the light-shielding layer 12 and the decorative layer 13 from above the recess 15, the light-shielding layer 12 and the decorative layer 13 can be formed in a portion 16 other than the recess 15 on the surface of the panel substrate 11. Structurally possible. In such a case, since it takes time, equipment cost, and time to manufacture the lighting panel for a vehicle, it is better to use the light-shielding layer 12 and the decorative layer 13 as the printing layer 21 as described above. This is advantageous because it is possible to reduce

  (Effect 3) The print layer 21 may be the pad print layer 31. Thereby, the concave portion 15 into which the light shielding layer 12 and the decorative layer 13 do not enter can be more easily and reliably formed.

  (Effect 4) As a modified example of the vehicle lighting panel, a colored layer 41 may be provided between the light shielding layer 12 and the decorative layer 13. And the coloring layer 41 may be the coating layer 22. Thereby, the coloring layer 41 can be provided inside the recess 15. Therefore, the inside of the concave portion 15 can be colored, and the concave portion 15 can be made to appear natural or noticeable when non-illuminated. In addition, at the time of the transmissive illumination, the transmissive illumination unit 2 provided with the colored layer 41 can be illuminated with the color of the colored layer 41. Therefore, the concave portion 15 can be illuminated with a natural color or a conspicuous color. At this time, the luminance of the transmitted illumination can be optimized by using the colored layer 41 as the transmittance adjusting layer. Further, by using the colored layer 41 as a light diffusing layer, it is possible to make the brightness of the transmitted illumination uniform and radiate softly.

  (Effect 5) According to the manufacturing method of the vehicle lighting panel, the same operation and effect as the above-described effect 1 can be obtained.

  (Effect 6) According to the modified example of the manufacturing method of the vehicle lighting panel, the same operation and effect as the above-described effect 4 can be obtained.

DESCRIPTION OF SYMBOLS 1 Illumination panel 2 Transmissive illumination part 3 Panel part 11 Panel base material 12 Light shielding layer 13 Decorative layer 14 Top coat layer 15 Concave part 16 Except the concave part 21 Print layer 22 Coating layer 31 Pad print layer 41 Color layer

Claims (6)

In a vehicle lighting panel including a light-shielding panel portion having a transmission lighting portion,
The panel portion, on the surface of a transparent panel substrate, at least, a light-shielding layer, a decorative layer, comprising a configuration in which a top coat layer is formed in order,
The transmission illumination unit is formed by a concave portion provided on the surface of the panel base material,
The light-shielding layer and the decorative layer are formed in a portion other than the concave portion on the surface of the panel base material,
The lighting panel for a vehicle, wherein the concave portion has the top coat layer formed therein. The vehicle lighting panel according to claim 1,
The light-shielding layer and the decorative layer are printing layers,
The lighting panel for vehicles, wherein the top coat layer is a coating layer. The vehicle lighting panel according to claim 2,
The lighting panel for a vehicle, wherein the printing layer is a pad printing layer. The vehicle lighting panel according to any one of claims 1 to 3,
A coloring layer is provided between the light shielding layer and the decorative layer,
The lighting panel for a vehicle, wherein the coloring layer is a coating layer. In a method for manufacturing a lighting panel for a vehicle in which a transmissive lighting section is provided on a light-shielding panel section,
On the surface of the transparent panel base material, at least, a light-shielding layer, a decorative layer, and a top coat layer are sequentially formed to constitute the panel portion,
Forming the transmitted illumination section by providing a concave portion on the surface of the panel substrate,
Forming the light-shielding layer and the decorative layer in a portion other than the concave portion on the surface of the panel substrate,
A method for manufacturing a lighting panel for a vehicle, wherein the top coat layer is formed inside the recess. The method for manufacturing a vehicle lighting panel according to claim 5,
A method for manufacturing a vehicle lighting panel, comprising: providing a colored layer between the light-shielding layer and the decorative layer; and forming the colored layer inside the concave portion.