JP3443405B2 - How to change the paint structure and paint color - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coating structure mainly used for surface coating of automobiles and a method for changing the color of coating.

[0002]

2. Description of the Related Art In painting automobiles and the like, the color cannot be changed after the color is specified by the paint. For this reason, automobiles colored in various colors are manufactured, but it is very difficult to estimate the colors that can be sold at the time of manufacture, because the colors change in various ways depending on the taste and fashion of the user. For this reason, there are adverse effects such that some vehicles cannot be sold depending on the color and inventory processing becomes difficult. In addition, the user who purchased the car cannot change the color after purchasing the car, and must continue to drive the car of the same color.

[0003]

Not only automobiles but all products colored with paint are manufactured in various colors, but it is extremely difficult to guess the user's color preference. Although it is possible to change the color by repainting the paint, the labor and cost for doing so are considerable, and the color cannot be changed easily.

Thermochromic materials have been developed that change color by changing temperature. This material is, for example, Japanese Patent Publication No.
44706, JP-B-51-44707, JP-B-51-44708, JP-B-52-7764, JP-B-51-46548 and the like.
Further, JP-A-6-107976 and JP-A-6-107.
977 and JP-A-6-107978.
However, the thermochromic materials described in these publications change the color depending on the temperature, and therefore require a structure for changing the temperature, so that the cost per unit area becomes extremely high. Further, since the color changes depending on the temperature, there is a defect that the color cannot be constant regardless of the temperature. Also,
The color that can be developed is also extremely limited, and there is a drawback that it cannot be changed to various colors.

The present invention was developed for the purpose of solving such drawbacks, and an important object of the present invention is to freely change various colors and to reduce the cost per unit area. It is another object of the present invention to provide a coating structure capable of preventing a color change due to a temperature change so as to obtain the same color regardless of the temperature, and a method for changing the color.

[0006]

According to the coating structure of the present invention, a substrate 1 having a large number of through holes 5 formed therein, a surface transparent layer 2 laminated on the surface of the substrate 1, and a substrate 1 are provided. It has a back surface transparent layer 3 laminated on the back surface, and a color light source 4 for irradiating the back surface transparent layer 3 with light. In the coating structure, the color light source 4 irradiates the back surface light-transmitting layer 3 with light, and the light is transmitted through the through holes 5 to color the front surface light-transmitting layer 2.

In the coating structure of the present invention, the surface translucent layer 2 can be colored. The colored surface light-transmitting layer 2 becomes a mixed color of the color of the light transmitted through the through hole 5 and the colored color.
Furthermore, the coating structure of the present invention can irradiate the back transparent layer 3 with light so as to be totally reflected. The light totally reflected by the back surface transparent layer 3 can be efficiently diffused over the entire surface of the back surface transparent layer 3. Furthermore, in the coating structure of the present invention, the substrate 1 can be a metal plate.

The method of changing the color of the coating of the present invention is performed by forming a large number of through holes 5 and laminating the front surface translucent layer 2 on the front surface and the back surface translucent layer 3 on the back surface. The layer 3 is illuminated with light. In this method, the irradiation light is transmitted through the through holes 5 to the surface translucent layer 2 to color the surface of the substrate 1. Furthermore, this method changes the color of the light that irradiates the back transparent layer 3,
Change the surface color.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. However, the examples shown below exemplify a coating structure for embodying the technical idea of the present invention and a method for changing the color of the coating, and the present invention provides a coating structure and a method for changing the color. Not specified below.

Further, in this specification, in order to make the claims easy to understand, the numbers corresponding to the members shown in the embodiments are referred to as "the claims column" and "to solve the problems". It is added to the members shown in "Means column". However, the members shown in the claims are not limited to the members of the embodiment.

The coating structure shown in the sectional view of FIG. 1 has a substrate 1 having a large number of through holes 5 formed therein, a surface transparent layer 2 laminated on the surface of the substrate 1, and a back surface of the substrate 1. The back transparent layer 3 and the color light source 4 which irradiates the back transparent layer 3 with light are laminated.

The substrate 1 is a non-translucent substrate such as a metal plate and provided with innumerable through holes 5. The through hole 5 has a diameter of 0.0
A large number of small holes having a size of 5 to 1.5 mm, preferably 0.1 to 1 mm are provided. A large number of small through-holes 5 are provided to make the through-holes 5 unobtrusive, and the surface translucent layer 2
Can be colored in a more uniform color. The aperture ratio of the through holes 5, which is specified by the size and the number of the through holes 5, influences the transmittance of the substrate 1 for transmitting light. If the number of through holes 5 is increased and the number is increased, the aperture ratio is increased. When the aperture ratio of the substrate 1 is increased, the light transmittance increases, but the strength of the substrate 1 decreases. Therefore, the aperture ratio of the substrate 1 is set to an optimum value in consideration of the intensity required for the substrate 1 and the light transmittance. The aperture ratio of the substrate 1 is, for example, 5 to 70%, preferably 10 to 60.
%. The substrate 1 having a low required strength increases the aperture ratio of the through hole 5 to increase the light transmittance. In the case of a substrate 1 that requires strength such as an automobile, the through hole 5 has a low aperture ratio to provide sufficient strength.

The through hole 5 of the substrate 1 is opened by a laser processing machine. The laser processing machine has the feature that it can open a small hole into a precise shape that is determined so that it cannot be burred. However, the through hole 5 can also be opened by a press. The press can efficiently provide the through holes 5.

The through hole 5 has a cylindrical shape as shown in FIG. 1 or a tapered shape as shown by a chain line in the figure. The tapered through hole 5 is small on the front light-transmitting layer side and is large on the back light-transmitting layer side. The through holes 5 allow light to be efficiently transmitted from the rear light-transmitting layer 3 to the front light-transmitting layer 2. Further, the through hole 5 has an inner surface as a reflecting surface so that the inner surface can reflect light.

The surface light-transmitting layer 2 is irradiated with the light transmitted through the through hole 5 and irradiates this light to the outside. Surface translucent layer 2
Is a transparent paint or a colored paint. The surface translucent layer 2, which is a transparent paint, directly radiates the light transmitted through the through hole 5 to the outside. Therefore, the light transmitted through the through hole 5 is emitted to the outside in the same color. When the surface translucent layer 2 is made of transparent paint, the surface of the substrate 1 is colored white or a reflective layer is provided. This is for efficiently irradiating the light transmitted through the through holes 5 from the surface light-transmitting layer 2 to the outside. The colored surface light-transmitting layer 2 is a mixed color of the color of light transmitted through the through hole 5 and the colored color. The colored surface light-transmitting layer 2 also has a light-transmitting property of transmitting the light passing through the through hole 5.

Further, the surface light-transmitting layer 2 can be applied by adding particles that reflect the light emitted from the through holes 5 to a transparent paint. White fine particles such as silica and alumina can be used for the particles added to the transparent paint. Since the white fine particles uniformly diffuse the light passing through the through holes 5 and radiate the light to the outside, the entire surface translucent layer 2 can be colored with a uniform color.

Further, the surface transparent layer 2 has through holes 5
It is also possible to add a phosphor that is excited by light passing through the transparent coating material to the transparent coating material and apply it. This surface translucent layer 2 has through holes 5
The fluorescent substance can emit light by being excited by the light transmitted through. The emission color of the phosphor is emitted to the outside from the surface light-transmitting layer 2 as a color mixture with the light transmitted through the through hole 5. Therefore, the surface translucent layer 2 emits light of a color different from the color of the excited light.

The surface light-transmitting layer 2 can be applied by mixing both the white fine particles and the phosphor with a transparent paint. The surface light-transmitting layer 2 can mix the emission color of the phosphor and the transmitted light transmitted through the through-hole 5 to uniformly radiate it outside.

The surface light-transmitting layer 2 is applied by filling the through holes 5 of the substrate 1. As shown in FIG. 2, the through hole 5 of the substrate 1 may be filled with the back surface translucent layer 3 and applied. Furthermore, the front light-transmitting layer and the back light-transmitting layer may be connected to each other through a through hole so that the front light-transmitting layer and the back light-transmitting layer are integrally connected. The structure in which the front light-transmitting layer and the back light-transmitting layer are communicated with each other by the transparent paint in the through hole can efficiently guide the light of the back light-transmitting layer to the front light-transmitting layer.

The back surface light-transmitting layer 3 is provided by applying a transparent paint or a colored paint to the back surface of the substrate 1 as in the case of the front surface light-transmitting layer 2. The front light-transmitting layer 2 and the back light-transmitting layer 3 preferably reflect light efficiently on the back surface so that the light can be diffused throughout. The back transparent layer 3 can totally reflect the light on the back surface in the light incident direction. Further, the back surface of the back light transmitting layer 3 can be colored white or silver to efficiently reflect light.

The color light source 4 allows light to enter in parallel with the back surface light transmitting layer 3. The illustrated color light source 4 comprises a light emitting diode 6. In the color light source 4, a plurality of light emitting diodes 6 are arranged side by side on the end surface of the back surface translucent layer 3, and light is incident on the back surface transmissive layer 3 from the end surface. As the light emitting diode 6, various light emitting colors such as red, blue and green are commercially available. The light emitting diodes 6 having different emission colors enter different colors into the back surface translucent layer 3. Further, the color light source 4 in which the light emitting diodes 6 of red, blue and green are arranged is the red, blue and green light emitting diodes 6 respectively.
It is possible to adjust the emission intensity of each of the above, mix the respective emission colors, and enter the light of the full-color emission color into the back surface translucent layer 3.

As the color light source 4, a cold cathode tube can be used instead of the light emitting diode 6. The cold cathode fluorescent lamp is inexpensive, has high emission intensity, and can be manufactured to be thin.
The strong light can be efficiently incident on. The cold-cathode tube can change the emission color with a phosphor applied to the inner surface of the glass tube. For this reason, by using cold cathode tubes having different emission colors,
Light with different emission colors can be incident on.

Further, the color light source 4 is, as shown in FIG.
Light can be incident on the back surface light-transmitting layer 3 by the optical fiber 7. This structure uses the optical fiber 7 to transmit the light to the back transparent layer 3
Light source such as the light emitting diode 6 or the cold cathode tube,
It can be arranged away from the back surface of the substrate 1. Optical fiber 7
Irradiates light in parallel with the back surface translucent layer 3 and
Diffuse light over the entire surface.

The color light source 4 makes light incident on the end portion of the rear surface light-transmitting layer 3. The rear light-transmitting layer 3 has a bright portion where light is incident,
The distant part becomes dark. In order to make the back surface translucent layer 3 emit light uniformly, the proportion of white fine particles or white powder added is changed. The back surface transparent layer 3 shown in FIG.
Is added to a portion close to the color light source 4 and a small amount to a portion distant from the color light source 4, so that the back surface translucent layer 3 is made to uniformly emit light.

[0025]

The coating structure and the method for changing the coating color of the present invention have a structure different from the conventional one and have the feature that they can be freely changed to various colors. According to the coating structure of the present invention and the method of changing the coating color, a surface transparent layer is laminated on the front surface of a substrate having a large number of through holes, and a rear transparent layer is laminated on the rear surface. This is because the light-transmitting layer is irradiated with light, and the light is transmitted from the through hole to the surface of the surface light-transmitting layer to color the surface. As described above, the coating structure and the method of changing the color of the present invention can change the surface color by a structure and method different from those of the conventional thermochromic material that changes the temperature by changing the temperature.
It has the advantages that the cost per unit area can be reduced, and that the same color can be obtained without any color change due to temperature change or color unevenness due to temperature difference. In particular, the coating structure of the present invention and the method for changing the coating color have the feature that the surface color can be changed very easily by changing the color of the light radiated to the back transparent layer.

[Brief description of drawings]

FIG. 1 is a schematic sectional view showing a coating structure according to an embodiment of the present invention.

FIG. 2 is a schematic sectional view showing a coating structure according to another embodiment of the present invention.

[Explanation of symbols] 1 ... Substrate 2 ... Surface translucent layer 3 ... Back transparent layer 4 ... Color light source 5 ... Through hole 6 ... Light emitting diode 7 ... Optical fiber 8 ... White fine particles

Claims (5)

(57) [Claims] 1. A transparent paint or an adhesive is applied to the surface of the substrate (1).
A coating in which a surface translucent layer (2), which is a colored paint, is laminated.
A substrate (1) having a structure, in which a large number of through holes (5) are opened;
The front light-transmitting layer (2) laminated on the surface of (1), the back light-transmitting layer (3) laminated on the back surface of the substrate (1), and the back light-transmitting layer.
(3) has a color light source (4) for emitting light, color light sources (4) is irradiated with light on the back transparent layer (3), permeable by transmitting the light through hole (5)
A coating structure that colors the surface translucent layer (2), which is light paint or colored paint. 2. The surface translucent layer (2) is colored.
The coating structure described in. 3. The coating structure according to claim 1, wherein the back surface translucent layer (3) is totally reflected to irradiate light. 4. The coating structure according to claim 1, wherein the substrate (1) is a metal plate. 5. A plurality of through holes (5) are opened to allow the surface to be transparent.
Light- transmitting or light- transmitting surface translucent layer (2)
The back side transparent layer (3) is laminated on the back side of the substrate (1) and the back side transparent layer (3) of the substrate is irradiated with light, and the irradiation light is transmitted from the through hole (5) to the front side transparent layer (2). There is a transparent coating that changes the color of the light that passes through and colors the surface of the substrate (1) and irradiates the back surface translucent layer (3).
A method of changing the coating color of the surface translucent layer (2) which is a colored coating material .