JP2002108221A - Display board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To give shade in a coloring tone with a simple method and to make color variations to be abundant in coloring using sublimable dye. SOLUTION: In a display board 10, a reception layer 12 colored by making sublimable dye penetrate the layer 12 is formed on a display substrate 11. Recessed faces 12b and projecting faces 12a are disposed in the reception layer 12 and a thick part and a thin part are formed. Thus, a dark color tone is obtained in the thick part and a light (weak) color tone in the thin part. Consequently, coloring with shade can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display panel colored with a sublimable dye.

[0002]

2. Description of the Related Art When a display panel such as a panel, a nameplate or a label is colored with a sublimable dye, a very bright and vivid color tone can be obtained. For this reason, it has been attempted to apply color coloring to a display plate such as a timepiece dial plate using a sublimable dye.

Conventionally, a display plate colored with a sublimable dye generally has a structure shown in FIG. FIG. 11 is a sectional view of a main part of a conventional display panel. In FIG. 11, the display plate 60 includes a display substrate 61 and a receiving layer 62 formed on the upper surface of the display substrate 61. The receiving layer 62 is colored by infiltrating a sublimable dye. .

As the display substrate 61, a metal plate, a glass plate, a plastic plate having high heat resistance, or the like is used. Further, in order to decorate the display substrate 61, surface treatment such as plating, painting, and the like, and various patterns are provided.

The receiving layer 62 formed on the upper surface of the display substrate 61 is formed into a paint by mixing a curing agent, an ultraviolet absorber and the like with an acrylic resin, a urethane resin, an epoxy resin or the like as a binder, and printing or coating. It is formed by a method or the like.

After forming the receiving layer 62 on the upper surface of the display substrate 61, a heat treatment is performed to cure the receiving layer 62.
For example, when a polyurethane resin is used for the receiving layer 62, it is placed in a heating device heated to about 100 ° C. for about 1 hour.
Heat for about 5-20 minutes.

After the receiving layer 62 is thus cured, a sublimable dye is permeated into the receiving layer 62 to be colored. Two methods can be selected as a method for infiltrating the sublimable dye.

As one of the methods, a color transfer paper printed and formed by an ink jet printer or the like using a sublimable dye ink is placed on the receiving layer 62, and is heated and pressurized in the receiving layer. This is a method of transferring to For example, when a polyurethane resin is used for the receiving layer, a heating temperature of about 1
About 1-2 at 80 ° C. and a pressure of about 10-20 g / cm ^2.
When pressure is applied for about a minute, the sublimable dye of the transfer paper vaporizes and penetrates into the receiving layer 62, and the receiving layer 62 is colored.
When the transfer is performed under heat and pressure using a transfer paper, if the upper surface of the receiving layer 62 is polished and finished to a smooth surface, the pressing force is uniform and a beautiful color without color unevenness is obtained. Coloring can be applied.

Another method is to immerse the sublimable dye into the receiving layer 62 by immersing the display substrate 61 on which the receiving layer 62 is formed in a heated sublimable dye solution. The sublimable dye solution is a solution in which a sublimable dye is blended with a plastic having an affinity for the dye. For example, a solution in which a sublimable dye is blended in a polyester resin can be selected. This sublimable dye solution is heated to about 100 to 120 ° C., and the display substrate 61 on which the receiving layer 62 is formed is immersed in the solution for about 1 to 2 minutes so that the sublimable dye penetrates into the receiving layer 62. Color. During immersion, it is necessary to shake the display substrate 61 from time to time, and by shaking, it is possible to obtain coloration without color tone unevenness.

[0010]

Although the color coloring applied as described above provides a bright and vivid color tone, the color tone is poor in shading and becomes monotonous in view of the color change. Was. In the method of transferring the transfer paper from the transfer paper under heat and pressure and coloring the transfer paper, if the transfer paper is formed by adding a shade to the color tone, the transfer paper can be colored in a shade. To perform color printing, it takes a lot of trouble to set the toning. In addition, the method of immersing in a sublimable dye solution to perform color coloring could not provide shaded color coloring.

[0011]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a color shading with a very simple method so as to enrich color variations. It is in.

[0012] In order to achieve this object, the invention according to claim 1 of the present invention relates to a display plate having a color receiving layer formed by infiltrating a sublimable dye on a display substrate. Is characterized by having a thin part and a thick part.

By providing a thin portion and a thick portion in the thickness of the receiving layer, a thin portion is obtained with a light color (light color), and a thick portion is obtained with a dark color. Coloring is applied.

According to a second aspect of the present invention, in the display panel according to the first aspect, uneven portions are provided on an upper surface of the receiving layer to form a thin portion and a thick portion.

A large number of irregularities such as a lattice-like irregularity and a wave-like irregularity can be provided as the irregularities. In the lattice-shaped unevenness, the convex portion has a thick receiving layer, so that a dark color tone can be obtained, and the concave portion has a thin receiving layer, so that a light color tone can be obtained. As a result, a dark color tone and a light color tone appear in a lattice pattern, and appear there with a three-dimensional effect.
In the corrugated uneven shape, the top portion of the wave has the thickest receiving layer, so that the darkest color tone is obtained, and the valley portion has the lightest receiving layer, so that the lightest color tone is obtained.
In addition, the color tone gradually changes in color from the top to the valley. And it appears continuously.

According to a third aspect of the present invention, in the display panel according to the first aspect, a thin portion and a thick portion are formed by providing a tapered slope on the upper surface of the receiving layer.

By providing a tapered slope, a color tone appears in which the tone gradually decreases in color from the highest portion to the lowest portion of the taper.

According to a fourth aspect of the present invention, in the display panel according to the second or third aspect, the unevenness or the tapered slope is provided after the sublimable dye has penetrated the receiving layer.

With this, the sublimable dye can be transferred from the transfer paper to the receiving layer and uniformly penetrated when the receiving layer is flat, so that the sublimable dye can be formed even after the unevenness or the tapered shape is formed. A uniform dispersion density can be obtained, color shading can be performed with beautiful shading, and a similar effect can be obtained by a method of immersing in a sublimable dye solution. spread.

According to a fifth aspect of the present invention, in the display panel according to the second or third aspect, the unevenness or the tapered slope provided in the receiving layer is provided before the sublimable dye penetrates the receiving layer. I do.

[0021] In this way, it is possible to give a color tint with a fine shade by a method of dipping in a sublimable dye solution.
The process design can be broadened.

According to a sixth aspect of the present invention, in the display panel according to the first aspect, the receiving layer has a thin portion and a thick portion formed by unevenness or a tapered inclined surface formed on the display substrate. It is characterized by the following.

As described above, the unevenness or the tapered inclined surface is previously formed on the surface of the display substrate itself, so that the light and shade portion of the sublimable dye is formed without forming the unevenness or the tapered surface on the receiving layer. A shade of color with a feeling is obtained. Processing to be applied to the display substrate can be formed into various shapes using a mold or the like.
Since mass production is possible, it is more suitable for mass production than when the receiving layer is formed using a pressing tool or the like.

According to a seventh aspect of the present invention, in the display panel according to the first aspect, the receiving layer has a portion having a small thickness and a portion having a large thickness formed by unevenness or a tapered inclined surface formed on both upper and lower surfaces thereof. Is formed.

According to the present invention, the density of the sublimable dye can be further enhanced by providing irregularities or tapered inclined surfaces on both upper and lower surfaces of the receiving layer. In addition, by forming different shapes of irregularities and inclined surfaces on the upper and lower surfaces, it is possible to obtain a varied shading shape.

According to an eighth aspect of the present invention, in the display panel according to any one of the first to seventh aspects, a protective film layer having a transparent and smooth surface is formed on the upper surface side of the receiving layer.

Thus, the color-colored receiving layer is protected from scratches and the like, and the sublimable dye is prevented from being released from the receiving layer. Makes you feel luxurious.

[0028]

Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 3 show a display panel according to a first embodiment of the present invention. 1 is a cross-sectional view of a main part of the display panel, FIG. 2 is a top view of the main part, and FIG. 3 is an explanatory view for explaining a method of forming the receiving layer in FIG.

As shown in FIG. 1, this display plate 10 is
1, a convex surface 12a and a concave surface 12
receiving layer 1 having b and colored with a sublimable dye
2 and a smooth upper surface 1 formed on the upper surface of the receiving layer 12.
The transparent protective film layer 13 has a transparent protective film layer 3a and an index 14 formed by printing characters and marks on the upper surface of the transparent protective film layer 13.

The display substrate 11 is made of a metal plate such as an aluminum material or a brass material, the surface of which is plated and the upper surface of which is painted white. When the reflectance of the display substrate 11 is increased, the color coloring becomes very bright and vivid. Therefore, it is preferable to apply a white surface treatment. The display substrate 11 may be provided with a pattern or the like. For example, if there is a satin pattern, a streak pattern, or the like, the decorativeness of the display plate can be enhanced.

In the present embodiment, the receiving layer 12 is formed by coating a transparent polyurethane resin as a binder with a curing agent and an ultraviolet absorber to form a coating material, and printing it on the display substrate 11. In the present embodiment, a polyurethane resin is used as the binder, but the binder is not particularly limited, and other resins such as an acrylic resin and an epoxy resin can be selected.
An ultraviolet absorber is used because the sublimable dye is easily discolored by ultraviolet light. As an ultraviolet absorber,
Benzotriazoles, which are said to absorb up to the long wavelength region of ultraviolet light, are preferred, and among them, 2- (3,5-di-t-butyl-2-humanperoxyphenyl) benzotriazole and 2- (3-t
It is preferable to select-(butyl-5-methyl-2-humanperoxyphenyl) -5-chlorobenzotriazole because a remarkable effect has been obtained in a sunshine weather meter test.

The upper surface of the receiving layer 12 has a convex surface 1.
2a and the concave surface 12b are formed and have a step.
The thickness of the receiving layer on the concave surface 12b is approximately 20 to 30 μm.
m, the thickness at the convex surface 12a is approximately 30 to 50 μm, and a step of approximately 10 to 20 μm is formed.

The sublimable dye is vaporized and permeates the receiving layer 12 and is colored. The method of permeating the sublimable dye is performed by the method shown in FIG. FIG. 3A is a diagram in which the receiving layer 12 is formed on the display substrate 11. The receiving layer 12 is formed on the display substrate 11 by a printing method, and thereafter, the receiving layer 12 is cured by heating.
The upper surface 12p is finished to a smooth surface by polishing. FIG. 3B shows a state in which the sublimable dye is transferred to the receiving layer, and the receiving layer 1 shown in FIG.
2 is placed, the transfer paper M color-printed with the sublimable dye ink is placed on the upper surface 12p of the receiving layer, and the transfer paper M is pressed by the pressing tool N of the pressing device in a heated state. Apply pressure.

The transfer paper M is obtained by performing color printing on white paper by an ink jet printer using a sublimable dye ink of a desired color.

The transfer paper M is placed on the upper surface 12p of the receiving layer 12, and the sublimable dye of the transfer paper is transferred to the receiving layer 12 under heat and pressure. In the case of the polyurethane resin in the present embodiment, approximately 10 ° C. in a state heated to a temperature of approximately 180 ° C.
Pressure is applied for about 1 to 2 minutes at a pressure of 〜20 g / cm ² . The heating temperature here is preferably set around the softening point temperature of the binder, and the pressing force and pressurizing time are preferably set as appropriate according to the depth of penetration of the sublimable dye. As described above, when the transfer paper is pressurized in a heated state, the color-printed sublimable dye vaporizes and penetrates into the receiving layer 12, and the receiving layer 12 is colored. At this time, in order to enhance the light resistance of the sublimable dye, at least 10 μm from the surface.
It is preferable that the dye is penetrated to the depth or more, and by sufficiently penetrating the sublimable dye deep into the receiving layer, beautiful coloring without coloring unevenness can be obtained.

The sublimation dye is transferred by the above method.
Here, the color printing of the sublimable dye formed on the transfer paper is a dot-like print which is almost invisible because it is formed by an ink jet printer. Therefore, when transferred in a pressurized state, the sublimable dye penetrates mainly directly below, so that the sublimable dyes of adjacent dots are not sufficiently mixed in the receiving layer and appear as dot marks. Coming happens. Although these dot-like marks are not visible to the naked eye, they appear as spots when viewed in an enlarged manner. Heat is applied again to eliminate the dot-like marks. In the present embodiment, 25
The heat treatment is performed at 0 ° C. × 10 minutes. In this way, convection of the vaporized sublimable dye occurs in the receiving layer, sufficient mixing of adjacent dot dyes occurs, dot dots disappear, and a beautiful appearance color is obtained.

FIG. 3C is a diagram showing a case where an uneven surface is formed on the upper surface of the receiving layer 12 colored with a sublimable dye. The display substrate 11 having the color-colored receiving layer 12 is placed on the stage L, and pressure is applied from above the receiving layer 12 with a pressing tool S having irregularities formed in a lattice shape under heating. The heating temperature here is preferably such that the binder is heated to a temperature around the softening point of the binder and pressurized slowly. By taking such a method, the convex surface 12a and the concave surface 12b shown in FIG.
Is obtained. This receiving layer 12 is finally subjected to a hardening treatment by applying relatively low heat. In the embodiment, the hardening process is performed by performing a heat process at a temperature of 100 ° C. for 30 minutes. The curing treatment prevents the sublimable dye from being released to the outside.

In the present embodiment, the transparent protective film layer 13 is formed by coating a curing agent and an ultraviolet absorber using a polyurethane resin as a binder, forming a coating, and forming the coating on the receiving layer 12 by a printing method. . The binder is not particularly limited, but it is preferable to select the same binder as the receiving layer 12 in consideration of the adhesion to the receiving layer 12. Further, the ultraviolet absorbent may be the same as that incorporated in the receptor layer 12, and as described above, particularly, 2- (3,5-di-t-butyl-2-humanperoxyphenyl) benzotriazole or 2- (3 -t-butyl-5-methyl-2-humanperoxyphenyl) -5-chlorobenzotriazole can be selected as having a good effect on light resistance.

The transparent protective film layer 13 is left at room temperature for about two days to be sufficiently cured. When forced curing is performed by heating, the sublimable dye causes convection and permeates into the protective film layer 13. When the sublimable dye penetrates into the protective film layer 13, the color tone unevenness and sharpness are affected, and a beautiful color cannot be obtained. Also, the upper surface 13 of the protective film layer 13
a is finished to a glossy smooth surface by polishing.

Finally, an arbitrary index 14 is formed by printing to obtain the display panel 10.

When the color-printed sublimable dye formed on the transfer paper M is transferred to the receiving layer 12 under heat and pressure, the upper surface 12p of the receiving layer 12
After finishing to a smooth surface. For this reason, since the pressure applied to the receiving layer uniformly acts on any part of the receiving layer, the sublimable dye uniformly penetrates into the receiving layer 12 to obtain a uniform color tone without coloring unevenness. Furthermore, since heat treatment at a considerably high temperature is performed to eliminate the dot-like marks of the sublimable dye, convection of the sublimable dye occurs in the receiving layer 12,
This dye is well mixed to obtain a more uniform color tone.

The sublimable dye that has permeated the receiving layer 12 is permeated in a vaporized state. Moreover, 10 to 20 g / cm ²
When the pressure is applied for 1 to 2 minutes under the pressure described above, the vaporized sublimable dye penetrates to a position deep enough to reach the display substrate 11. When the upper surface of the receiving layer 12 is flat, the amount of the vaporized sublimable dye that has penetrated at any position is the same, and the color tone is the same.

When the convex surface 12a and the concave surface 12b are formed with a step on the upper surface of the receiving layer 12, the convex surface 12a
The thickness of the receiving layer becomes thicker at the point, and the thickness of the receiving layer becomes thinner at the concave surface 12b. As described above, since the convex portion and the concave portion are formed while slowly pressing with the pressing tool having the concave and convex as described above, the receiving layer in which the sublimable dye permeates the concave portion flows toward the convex portion and the convex portion and the concave portion are formed. A recess is formed. Therefore, the amount of the vaporized sublimable dye is larger at the convex surface 12a than at the concave surface 12b. For this reason, the color tone is deeper at the thick convex surface 12a of the receiving layer, and pale (thin) at the thin concave surface 12b of the receiving layer. Even with the same color shade, color shading appears depending on the thickness, that is, depending on the amount of permeation of the sublimable dye.

1 and 2, a dark color appears at the convex surface 12a where the irregularities are formed in a lattice shape, while a light (light) color appears at the concave surface 12b. Come. As described above, by forming the thick portion and the thin portion of the receiving layer even with the same color, a color tone mixed with shading appears to enhance the decorativeness.

Further, a hardening treatment of the receiving layer 12 in which the sublimable dye has penetrated is performed to prevent the sublimable dye from escaping to the outside. Further, by providing the transparent protective film layer 13, not only protection against damage, but also the color-colored receiving layer 12 through the transparent and glossy protective film layer 13 is provided.
When viewed from the above, the borderline of the color coloring is very clearly visible and presents a bright and vivid color tone. In addition, the unevenness of the color tone accompanied by the light and shade further enhances the three-dimensional appearance, and the color tone becomes deeper and deeper as it sinks, giving a sense of quality.

In addition, since a particularly effective ultraviolet absorber is dispersed in the receiving layer 12 and the transparent protective film 13, the light resistance is very good, the colored color tone can be maintained forever, and the life is long. Let it.

Next, FIGS. 4 and 5 show a display panel according to the second embodiment. FIG. 4 is a sectional view of a main part of the display panel according to the second embodiment, and FIG. 5 is an explanatory view showing a method of forming the receiving layer in FIG.

As shown in FIG. 4, the display plate 20 is
1, a receiving layer 22 colored with a sublimable dye formed on the upper surface of the display substrate 21, a protective film layer 23 having a transparent and smooth surface formed on the upper surface of the receiving layer 22, and a protective film layer 23. And an index 24 such as a character, a numeral, a mark, a pattern, and the like, which are printed thereon. The display panel 10 according to the first embodiment described with reference to FIG.
The point different from the structure of the above is the shape of the receiving layer 22. The receiving layer 22 in the present embodiment has a mountain-like shape, and has a peak 22a and a bottom 22b of a valley. In addition, there is a certain level difference between the peak 22a of the mountain and the bottom 22b of the valley.

The method of forming the receiving layer 22 colored with the above-described sublimable dye will be described with reference to FIG. FIG.
(a) shows a diagram in which a transparent receiving layer 22 is formed on the upper surface of a display substrate 21 by a coating method or a printing method. Display substrate 2
Reference numeral 1 denotes a metal plate that has been subjected to surface treatment such as plating and painting. The transparent receiving layer 22 is formed on the display substrate 21 by a printing method by blending a curing agent and an ultraviolet absorber using a transparent polyurethane resin as a binder and forming a coating, similarly to the first embodiment described above. .

FIG. 5B is a view showing the formation of a chevron on the upper surface of the receiving layer 22. The display substrate 21 on which the receiving layer 22 is formed is placed on the stage L, and the receiving layer 22 is slowly pressed while being heated from above by a pressing tool S having a chevron shape. Thereby, the chevron shape of the pressing tool S is changed to the receiving layer 22.
Is transferred to the upper surface side of the substrate, and a receiving layer 22 having a chevron shape shown in FIG. 5C is obtained. The pressurizing method here is the same as the pressurizing method for forming the uneven surface on the receiving layer 12 in the above-described first embodiment, and thus the detailed description is omitted.

Next, the receiving layer 22 formed in a chevron shape by the above-described method is immersed in a desired color sublimable dye solution together with the display substrate 21 (the immersion diagram is omitted). In the immersion method, a hook holding the display substrate 21 is used, and the hook holding the display substrate 21 is immersed in a bath of a heated sublimable dye solution. The solution is sometimes agitated during immersion.

The above-described sublimable dye solution is a solution in which a sublimable dye having a plasticity and affinity for the dye is blended. For example, a solution in which a sublimable dye is blended in a polyester resin can be selected. When this sublimable dye solution is heated to about 100 to 120 ° C. and immersed for about 1 to 2 minutes, the sublimable dye
2 to be colored.

When the immersion method is used, the amount of the sublimable dye that has penetrated is almost the same per unit volume regardless of the shape of the receiving layer. Therefore, a thick portion has a large amount of sublimable dye, and a thin portion has few. And the place (site) where many sublimable dyes are present has a dark color tone,
A small part (part) shows a light (light) color tone.

In this embodiment, since the peak 22a of the peak of the receiving layer 22 is the thickest, a deep color tone is exhibited.
As the thickness gradually decreases toward the bottom 22b of the valley, the color tone gradually fades, and the bottom 22
Since b is the thinnest, the color tone is the lightest. Further, since the thickness gradually increases from the bottom point 22b of the valley toward the peak 22a of the mountain, the color tone gradually changes from a light color tone to a dark color tone, and becomes the darkest color tone at the peak 22a of the mountain. Then, the change of the color tone is continuously repeated. In this manner, even with the same color tone, a color tone in which the shading continuously and delicately changes as the thickness changes is obtained. By forming this mountain shape in a stripe shape, a ring shape, or a cross shape, the color pattern changes, and various decorative variations can be enjoyed. Further, in the present embodiment, the shape is formed in the shape of a mountain, but almost the same action is obtained even if the shape is a waveform.

Here, the peak 22a of the mountain and the bottom 22b of the valley are
A certain level difference is required. If the difference is several μ, the shade of color tone does not appear remarkably. Although it depends on the thickness of the receiving layer, if there is at least one-third or more of the thickness of the receiving layer, a very distinct shade of color appears. For example, if the thickness of the receiving layer is 30 to 40 μm, 1
If there is a step of 0 to 20 μm, the shade will appear clearly.

When the receiving layer 22 is colored by the above-described immersion method, the sublimable dye permeating the surface layer of the receiving layer 22 tends to escape relatively quickly. Therefore, after cleaning, pressure is again applied under heating as shown in FIG. FIG. 5D shows a state in which the upper surface of the chevron-shaped receiving layer 22 is pressed by using the pressing tool S to align the positions. For example, when a polyurethane resin binder is used, the receiving layer 22 is heated to a temperature of about 180 ° C. and pressed at a pressure of about 10 to ²⁰ g / cm ² for about 1 to 2 minutes. As described above, when the heating / pressurizing treatment is performed, the sublimable dye in the surface layer portion penetrates further to the back, and the sublimable dye does not escape over a long period.

Further, after the heating and pressurizing treatment, the receiving layer is cured. In the present embodiment, the curing treatment of the receiving layer is the same as that of the first embodiment described above.
A hardening treatment is performed by performing a heat treatment for 0 minutes.

The transparent protective film layer 23 is formed after performing the above-mentioned curing treatment. Since the protective film layer 23 is the same as the protective film layer described in the first embodiment, a detailed description thereof will be omitted.

After the transparent protective film layer 23 is formed, it is left at room temperature for about two days to be sufficiently cured, and then the upper surface is polished to finish a glossy smooth surface. Finally, the indicator 24 is formed by printing or the like to obtain the display panel 20.

By forming the upper surface of the receiving layer 22 into a mountain shape as in the present embodiment, the shade of the colored color tone changes with a subtle change from dark to light and from light to dark in order. A color tone in which it is continuously repeated is obtained.

Further, the receiving layer 22 and the transparent protective film layer 23
Since the ultraviolet absorbent is dispersed in the toner, the color tone is excellent and the color tone without discoloration can be maintained for a long time. Also,
Since the sublimable dye is penetrated deep into the receiving layer 22 and the hardening treatment of the receiving layer 22 and the transparent protective film layer 23 is sufficiently performed, the sublimable dye hardly escapes. In addition, the glossy and transparent protective film layer 23 allows the color tones to be bright, vivid and clear, as well as deeply sunk, giving a sense of quality.

Next, FIG. 6 is a sectional view of a display panel according to the third embodiment. Display board 30 in the present embodiment
Is composed of exactly the same components as the display panel 10 of the first embodiment and the display panel 20 of the second embodiment. The present embodiment differs from the above-described embodiment in that the upper surface of the receiving layer 32 forms a tapered inclined surface. The central portion of the receiving layer 32 is the thickest, has a vertex 32a at that portion, and becomes thinner toward the outer periphery to form a gentle slope 32c. And the thickness of the outer edge part 32b is the thinnest.

The method of forming a tapered inclined surface on the upper surface of the receiving layer 32 and the method of coloring with a sublimable dye can be the same as those in the first embodiment or the second embodiment. A detailed description of the above will be omitted. Also, the display substrate 31, the transparent protective film layer 33, and the index 34 constituting the display panel 30 are the same as those in the first embodiment or the second embodiment described above, and accordingly, detailed description will be omitted. .

As shown in FIG. 6, the central portion is the thickest,
In the receiving layer 32 having a tapered inclined surface shape that becomes thinner toward the outer periphery, the vertex 32a at the center shows the darkest color tone, and the thinnest portion at the outer edge 32b shows one. Shows the lightest (lighter) color tone. The density gradually decreases from the vertex 32a toward the outer periphery, and becomes lightest at the outer edge portion 32b. The fact that the color tone becomes lighter toward the outer periphery in this way also attracts interest as one of the color variations.

In this embodiment, the tapered shape at the center is described as being the thickest. On the contrary, the color tone at the tapered shape at the outer edge is the thickest and the center is the thinnest toward the outer periphery. It appears darkly.

FIGS. 7 and 8 show a display panel according to the fourth embodiment. FIG. 7 is a sectional view of a main part of a display panel 40 according to the fourth embodiment, and FIG. 8 is an explanatory view showing a method of forming the display panel 40 in FIG. In the display panel 40, an uneven pattern appearing on the lower surface of the receiving layer 42 is realized by an uneven surface provided on the display substrate 41. This uneven surface is formed in advance when the display substrate 41 is formed. The receiving layer 42 is formed on the uneven surface of the display substrate 41 formed as described above. This receiving layer 4
When coloring 2, as described in the above embodiment,
Generally, any one of a transfer method and a dipping method is used. When the transfer method is used, it is necessary to sufficiently diffuse the permeated dye inside the receiving layer after transferring the image on a transfer paper or the like to make the distribution density of the dye per unit volume uniform. On the other hand, in the case of the immersion method, since the immersion is performed by immersion in a sublimable dye solution, coloring is easy and dye penetration is uniform regardless of the shape of the receiving layer. The protective film layer 43 and the various indicators 44 are formed on the upper surface of the receiving layer 42 colored by such a method. The display substrate 41 is the first to
Similarly to the receiving layer of the third embodiment, the upper surface is
1a and the concave surface 41b are formed, and have a certain level difference. The step between the concave surface 41b and the convex surface 41a is at least 1/3 of the thickness of the thickest part in the receiving layer 42.
It is preferable to set the above. Note that the materials and constituent members of each part are the same as those in the first and second embodiments, so that the details will be omitted.

Next, a method for forming the display panel 40 will be described with reference to FIG. FIG. 8A shows a case where a plurality of concave and convex patterns including a convex surface 41a and a concave surface 41b are formed on the surface of the display substrate 41 in the process of forming the display substrate 41. Such a concavo-convex pattern is formed using a molding machine or the like.
As shown in FIG. 8B, the receiving layer 42 is formed by printing so as to have a constant thickness on the convex surface 41a while burying the concave surface 41b of the display substrate 41 thus formed. FIG. 8 (c) is a view showing a process in which a sublimable dye is colored onto the formed receiving layer 42 by a transfer method, and the receiving layer 42 shown in FIG. Is placed on the display substrate 41, on which the transfer paper M color-printed with the sublimable dye ink is placed on the receiving layer 42, and the transfer paper M is pressed by the pressing tool N of the pressing device in a heated state. . The details of the transfer method are the same as those described in the first embodiment of FIG. In addition, in the receiving layer 42 of this embodiment, since the dye after the transfer may not uniformly penetrate due to the unevenness, the dye is convected and diffused sufficiently after the transfer to perform per unit volume. It is necessary to make the dye distribution density uniform. After this transfer is completed, the transparent protective film layer 43 and the various indicators 44 are placed on the upper surface of the receiving layer 42, and the display panel 40 is completed.

In the fourth embodiment, the structure of the display substrate 40 on which the uneven surface is formed and the forming process are described.
By forming a tapered inclined surface having some peaks and valleys in addition to the uneven surface, the density of the receiving layer can be expressed. In this case, the display substrate is processed using a mold or the like having an inclination.

Next, a description will be given of a display panel provided with an uneven surface or a tapered inclined surface on both upper and lower surfaces of a receiving layer with reference to FIGS. 9 and 10. FIG. FIG. 9 is a sectional view of a main part of a display panel according to the fifth embodiment, and FIG. 10 is an explanatory view showing a method of forming the display panel 50 in FIG.

As shown in FIG. 9, the display panel 50 is
1, a receiving layer 52 colored with a sublimable dye formed on the upper surface of the display substrate 51, a protective film layer 53 having a transparent and smooth surface formed on the upper surface of the receiving layer 52, and a protective film layer 53. And an index 54 such as a character, a numeral, a mark, or a pattern printed thereon. As shown in FIG. 9, the receiving layer 52 of the present embodiment has an uneven surface on the lower surface side along the shape of the convex surface 51 a and the concave surface 51 b provided on the display substrate 51, and the upper surface side has a mountain-shaped slope. The surface 52c is formed.
In this manner, different patterns are formed on the upper and lower surfaces of the receiving layer 52, and a thick portion and a thin portion can be formed with respect to the thickness, so that various shades of color appear.

Such a display panel 50 is formed by a method as shown in FIG. FIG. 10A shows a process in which the surface of the display substrate 51 is formed in advance with a concavo-convex pattern composed of a convex surface 51a and a concave surface 51b in the process of forming the display substrate 51. Such a concavo-convex pattern is formed using a molding machine or the like. As shown in FIG. 10B, the receiving layer 52 is formed by printing so that the surface is flat and has a constant thickness while burying the concave surface 51b of the display substrate 51 thus formed. FIG. 10C shows a state in which a mountain-shaped inclined surface is formed on the upper surface of the formed receiving layer 52, and the receiving layer 52 shown in FIG. The display substrate 51 thus placed is placed, and the upper surface of the receiving layer 52 is slowly pressed while being heated from above by a pressing tool S having a chevron shape.
As a result, the chevron shape of the pressing tool S is transferred to the upper surface side of the receiving layer 52, and the chevron-shaped receiving layer having a gently inclined surface 52c from the vertex 52a to the outer edge 52b shown in FIG. 52 are obtained. The pressurizing method here is the same as the pressurizing method for forming the uneven surface on the receiving layer 12 in the above-described first embodiment, and thus the detailed description is omitted. Next, the receiving layer 52 formed in a chevron by the above-described method is immersed together with the display substrate 51 in a desired color sublimable dye solution (not shown). Thereafter, the upper surface of the receiving layer 52 is heated and pressed again by using the pressing tool S as shown in FIG. 10E to promote the penetration of the sublimable dye. The immersion and pressurization described above are the same as in the second embodiment shown in FIG. Finally, FIG.
As shown in (f), a transparent protective film layer 53 and various indicators 54 are placed on the upper surface of the receiving layer 52, and the display panel 50 is completed.

In the fourth embodiment shown in FIGS. 7 and 8 and the fifth embodiment shown in FIGS.
The display substrate 4 is provided as a means for providing irregularities on the lower surface side of
The surfaces of 1, 51 were directly processed into irregularities. As another means for providing such unevenness, it is also possible to adopt a configuration in which the surfaces of the display substrates 41 and 51 are flat and a white-painted unevenness member for increasing the reflectance is disposed thereon.

As described above, as the concave and convex shape of the receiving layer, the shape having the convex portion and the concave portion in the first embodiment and the chevron shape in the second embodiment have been described. In the third embodiment, the one having the tapered shape has been described. On the other hand, in the fourth embodiment, the display substrate itself is provided with an unevenness or a tapered slope, and in the fifth embodiment, the unevenness or the tapered slope is provided on both surfaces of the display substrate and the receiving layer, thereby forming the receiving layer. Of light and shade. However, the present invention is not limited to the above shapes. There are thick and thin places in the receiving layer,
Any shape can be applied as long as there is a step (a thickness difference) in the shape.

As the display plate which can be used by being colored with a sublimable dye as shown in the first to fifth embodiments, various types of panels, nameplates, labels, stickers, and the like can be used. In addition, a display panel for a clock, a display panel for various instruments, and the like can also be used.

[0075]

As described above, in the display panel according to the present invention, the receiving layer or the display substrate which is colored with a sublimable dye is provided with uneven steps to form thick and thin portions. Accordingly, a dark color tone and a light (light) color tone can be produced even with the same color tone. In addition, a color tone that gradually changes from a dark color tone to a light color tone can be produced.

Further, by providing the receiving layer or the display substrate with a tapered inclined surface, a color tone that gradually changes from a dark color tone to a light color tone can be produced. From the above, it is possible to freely change the concavo-convex shape, the tapered inclined surface shape, and the like, and to perform color coloring with an arbitrary light and shade pattern, so that a variety of color coloring variations can be designed.

Further, since the unevenness of the receiving layer is formed by pressing under heating with a pressing tool having an uneven shape, the processing method can be made very simple and the manufacturing cost can be reduced.

Further, since the concave and convex shape and the tapered shape of the receiving layer are formed after the sublimation dye is permeated, the dispersion density of the sublimable dye permeating the receiving layer after formation is maintained at any position. It is almost the same amount. For this reason, the color tone is affected only by the thickness of the receiving layer,
It is easy to manage to obtain the desired shade. Further, a method of immersion in a sublimable dye solution, a method of transfer from transfer paper, and a method of coloring can be selected, so that the range of choice is widened.

Further, the steps of the unevenness provided in the receiving layer and the tapered inclination can also be realized by forming them on the display substrate formed thereunder. For this reason, by forming an uneven surface or a tapered inclined surface on the display substrate in advance and coating the receiving layer thereon, it becomes possible to express the density of the sublimable dye without processing the receiving layer. . It is relatively easy to apply such unevenness or tapered inclination to the display substrate, and if a mold or the like is used, a uniform product can be mass-produced. Therefore, it is suitable for mass production of the same quality. On the other hand, when such processing is performed on the receiving layer, fine shading can be achieved by appropriately adjusting the force applied to the pressing tool.

If a coloring method by immersion in a sublimable dye solution is used, even if the concave and convex shape and tapered shape of the receiving layer are formed before the sublimation dye is penetrated, a desired color coloring with shading is obtained. be able to. Thereby, the range of the process design can be expanded.

The provision of the transparent protective film layer not only protects the receiving layer from damage, but also prevents the release of the sublimable dye from the receiving layer, thereby providing a beautiful color tone over a long period of time. Hold. In addition, the color tone with shading gives a three-dimensional effect, and the color tone gives a sense of depth and luxury.

Further, in the present invention, since an excellent ultraviolet absorbent is dispersed in the receiving layer and the transparent protective film layer, the light resistance of the sublimable dye is good, and the initial quality is maintained for a long period of time. Needless to say.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a display panel according to a first embodiment of the present invention.

FIG. 2 is a top view of a main part of the display panel in FIG. 1;

FIG. 3 is an explanatory view showing a step of forming a receiving layer in FIG. 1;

FIG. 4 is a sectional view of a main part of a display panel according to a second embodiment of the present invention.

FIG. 5 is an explanatory view showing a step of forming a receiving layer in FIG. 4;

FIG. 6 is a sectional view of a display panel according to a third embodiment of the present invention.

FIG. 7 is a sectional view of a display panel according to a fourth embodiment of the present invention.

FIG. 8 is an explanatory view showing a process of forming the display panel in FIG. 7;

FIG. 9 is a sectional view of a display panel according to a fifth embodiment of the present invention.

FIG. 10 is an explanatory view showing a step of forming the display panel in FIG. 9;

FIG. 11 is a sectional view of a main part of a conventional display panel.

[Explanation of symbols]

 10, 20, 30, 40, 50 Display plate 11, 21, 31, 41, 51 Display substrate 12, 22, 32, 42, 52 Receiving layer 12a, 41a, 51a Convex surface 12b, 41b, 51b Concave surface 13, 23, 33, 43, 53 Protective film layer 22a Peak 22b Peak of valley 32a, 52a Peak 32b, 52b Outer edge 32c, 52c Inclined surface

Claims (8)

[Claims] 1. A display panel in which a color-colored receiving layer formed by penetrating a sublimable dye is formed on a display substrate, wherein the receiving layer has a thin portion and a thick portion. Display board. 2. The display panel according to claim 1, wherein the receiving layer is provided with irregularities on its upper surface to form a thin portion and a thick portion. 3. The display panel according to claim 1, wherein the receiving layer has a tapered slope on its upper surface to form a thin portion and a thick portion. 4. The display panel according to claim 2, wherein the unevenness or the tapered slope is provided after the sublimable dye has penetrated the receiving layer. 5. The display panel according to claim 2, wherein the unevenness or the tapered slope is provided before the sublimable dye penetrates into the receiving layer. 6. The display panel according to claim 1, wherein the receiving layer has a thin portion and a thick portion formed by unevenness or a tapered inclined surface formed on the display substrate. 7. The receiving layer according to claim 1, wherein a thin portion and a thick portion are formed by irregularities or tapered inclined surfaces formed on both upper and lower surfaces of the receiving layer. Display board. 8. The display panel according to claim 1, wherein a protective film layer having a transparent and smooth surface is formed on an upper surface side of said receiving layer.