JPH1024649A - Production of decorative panel and production of transfer type coating sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the quantity of image data for printing a transfer type coating sheet. SOLUTION: Colored patterns are divided to apply a design to form divided original image data and binarization processing is applied to the divided original image data to obtain binarized image data and a plurality of binarized image data are combined to obtain the binarized image data of the whole of the colored patterns and the colored patterns are printed on the basis of the binarized image data.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a decorative plate used for a decorative panel such as a wall material of an elevator cab or a door of a landing, and a method of manufacturing a transfer type coated sheet used therefor. is there.

[0002]

2. Description of the Related Art Conventionally, as a method of forming a colored pattern on a surface of a metal plate, a method of screen printing has been often used. However, the coloring method by screen printing requires many processing steps and is complicated, and it takes much time for manufacturing. In particular, when a pattern of a plurality of colors is formed, the same number of screen plates as the number of colors are required, and the number of steps is increased.

On the other hand, for example, Japanese Patent Laid-Open No. Hei 6-3266
No. 5 discloses a transfer type coating sheet in which a transparent resin layer is formed on the surface of a metal plate and a colored pattern formed by a sublimation type coloring material is formed, and the sublimation type coloring material of the transfer type coating sheet is made transparent. It shows a method of sublimating a resin layer and transferring a colored pattern to a transparent resin layer. According to this method, the manufacturing time can be reduced and the manufacturing cost can be reduced as compared with screen printing.

[0004]

In the conventional method for manufacturing a decorative plate as described above, the beauty (image quality) of a colored pattern is high.
Depends on the number of representable colors (data depth) and how small one point representing the color is (resolution).
Since both the data depth and the resolution are factors that increase the image data, the image quality is proportional to the data amount. In other words, in order to obtain better image quality, a larger amount of data is required.

[0005] Here, an image generally called a full color uses an image having a data width of 24 bits, and the fineness of the data that most affects the image quality is 400.
dpi (400 dots per inch) is required. When this is calculated as the data size, for example, a capacity of about 1000 MB is required for one square meter. In an actual product, a colored pattern is often formed in an area larger than 1 square meter, which results in huge data exceeding 1 GB. Therefore, there is a problem that it is almost impossible to physically manage the data as it is.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and can reduce the amount of image data for printing a transfer-type coated sheet. It is an object of the present invention to provide a method for manufacturing a decorative plate and a method for manufacturing a transfer-type coated sheet that can be easily handled.

[0007]

According to a first aspect of the present invention, there is provided a method of manufacturing a decorative plate, comprising the steps of forming a light-transmitting resin layer on a substrate via a base colored layer, and dividing a colored pattern on a computer. After creating the divided original image data, the divided original image data is subjected to binarization processing to obtain binarized image data, and by combining a plurality of binarized image data, the entire colored pattern A step of obtaining a digitized image data, a step of printing a colored pattern with a sublimation-type coloring material based on the binarized image data of the entire colored pattern to produce a transfer-type coating sheet, and a sublimation-type coloring material of the transfer-type coating sheet Is transferred to the light-transmitting resin layer by sublimation transfer.

According to a second aspect of the present invention, there is provided a method for manufacturing a decorative plate, in which a colored pattern is partially divided to create divided original image data.

According to a third aspect of the present invention, there is provided a decorative plate manufacturing method in which divided original image data is divided for each color component of a colored pattern.

According to a fourth aspect of the present invention, there is provided a decorative plate manufacturing method, wherein a binarization process is performed by an error diffusion method in which the effect of sublimation blur due to sublimation of a sublimation type coloring material is corrected.

According to a fifth aspect of the present invention, a non-periodic random noise is added during the binarization process.

According to a sixth aspect of the present invention, in the method of manufacturing a decorative plate, a color correction process is performed on divided original image data so as to correct a discoloration caused by a colored pattern being superimposed on a base color of a base colored layer. is there.

According to a seventh aspect of the present invention, in the method of manufacturing a decorative plate, the C ₁ M ₁ Y ₁ K ₁ values of the pixels constituting the divided original image data are converted into R ₁ G ₁ B ₁ values, XYZ values, and R ₂ G ₂ values. A color correction process is performed by converting the B ₂ value and the C ₂ M ₂ Y ₂ K ₂ value in this order, and R ₁ G ₁ B
The conversion from the ₁ value to the XYZ value and the conversion from the XYZ value to the R ₂ G ₂ B ₂ value are performed by using a look-up table in which the correspondence between these values is obtained in advance and tabulated information is used.

According to the eighth aspect of the present invention, there is provided a decorative plate manufacturing method, wherein a cyan,
Assuming that the inside of the octahedron having the chromatic values of the pure colors of magenta, yellow, red, green, and blue as vertices can be reproduced, it is determined whether color reproduction processing can reproduce the original color.

According to a ninth aspect of the present invention, in the method of manufacturing a decorative plate, by specifying a width for increasing each value of R, G, and B, the definition information of the representative color can be obtained as a combination of all possible numbers. Using a computer to create image information of a basic chart in which color patches of representative colors are arranged from definition information, and transferring a plurality of sheets with a sublimation-type coloring material based on the image information of the basic chart Step of printing a shaped coating sheet, light-transmitting resin layer formed on a substrate via a white base coloring layer, and light transmitting property formed on another substrate via a base coloring layer other than white Sublimation transfer of the sublimation-type coloring material of each transfer-type coating sheet to the resin layer to produce a white background chart and a color ground chart, and a colorimeter for each color patch in the white background and the color ground chart More color measurement, the basic chart R
A step of editing the correspondence between the GB values and the colorimetric results by a computer, and performing interpolation on the edited results to determine the relationship between the RGB values of colors other than the selected color in the basic chart and the pseudo colorimetric results. A look-up table is created by a process required by a computer.

According to a tenth aspect of the present invention, in the method of manufacturing a transfer-type coated sheet, after a colored pattern is divided and designed on a computer to generate divided original image data, a binarization process is performed on the divided original image data. Obtaining binary image data, and combining the plurality of binary image data to obtain binary image data of the entire colored pattern;
And a step of printing a colored pattern on transfer paper with a sublimation-type coloring material based on the binarized image data of the entire colored pattern.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. Embodiment 1 FIG. FIG. 1 is a sectional view schematically showing a decorative plate manufactured by the manufacturing method according to Embodiment 1 of the present invention. In the figure, on a metal substrate 1, a base coloring layer 2 also serving as a rust-proof layer is formed. This base coloring layer 2
A transparent resin layer 3 as a light-transmitting resin layer made of a transparent paint (clear) such as an acrylic paint, a polyester paint, or a urethane paint is formed on the top. Into the inside of the transparent resin layer 3, a sublimation type color toner 4 and a fading inhibitor 5, which are sublimation type coloring materials, enter, and a coloring pattern is formed by the sublimation type color toner 4.
Further, a transparent top coat layer 6 containing a fading inhibitor 5 is formed on the transparent resin layer 3 in order to prevent damage and fading.

Next, an outline of a method for manufacturing the decorative plate of FIG. 1 will be described. FIG. 2 is an explanatory view showing a method of manufacturing the decorative plate of FIG. First, a coloring pattern is freely designed on a computer (not shown). Further, as shown in FIG.
To form After the drying of the base coloring layer 2, as shown in FIG. 2C, a transparent resin containing a fading inhibitor 5 is applied to form a transparent resin layer 3 on the base coloring layer 2.

On the other hand, a computer is connected to an electrostatic plotter 11 as shown in FIG.
The transfer type coating sheet 13 is manufactured. After this, FIG.
As shown in (1), the transfer type coating sheet 13 is overlaid on the transparent resin layer 3. Then, as shown in FIG. 2E, the horizontal and vertical heating and pressing rollers 14 and 15 are used to
The transfer type coating sheet 13 is transferred under heating and pressure at an appropriate temperature and pressure. This transfer can be performed by another method such as vacuum transfer. Thereby, the sublimation type color toner 4 on the transfer type coating sheet 13 sublimates and enters the inside of the transparent resin layer 3, and a colored pattern is transferred and formed on the transparent resin layer 3.

Thereafter, as shown in FIG.
2 is peeled off, a transparent resin containing the anti-fading agent 5 is applied and dried to form the top coat layer 6,
The decorative plate is completed.

Next, FIG. 3 is an explanatory diagram showing a method for creating colored pattern image data according to the first embodiment of the present invention. As described above, the image data is about 1000 MB per square meter and cannot be physically managed. Therefore, in this example, first, as shown in FIG. Divided into multiple parts of
The design work is performed only on a part (for example, a hatched part) of them. At this time, the data is divided so that the data amount of the divided portion becomes a size that is physically easy to manage. Then, as shown in FIG. 3B, divided original image data for a part is created.

Thereafter, as shown in FIG. 3C, a part of the divided original image data is transferred to the memory of the computer, and
For one row of pixel data as shown in FIG.
The color correction processing of (e) and the binarization processing of FIG. Then, as shown in FIG. 3 (g), the binarized data is returned to the memory. Thus, FIGS. 3 (e) to 3 (g)
By performing the above operation on all the lines of the divided original image data, binarized image data as shown in FIG. The above-described operation is performed on all the divided portions of the colored pattern, and the binarized image data of each portion is combined to obtain binarized image data of the entire colored pattern.

Here, in the conventional full-color system, C
Since each color of (cyan), M (magenta), Y (yellow), and K (black) is separated into 0 to 255, the data amount per pixel of the original image is C, M, Y, and K, respectively. 8 bits, that is, a data amount of 4 colors × 8 bits. On the other hand, in the above example, since the binarization process in which each color is represented by 1 or 0 is performed, each of C, M, Y, and K has a data amount of 1 bit, that is, 4 colors × 1 bit. Accordingly, the amount of image data of the colored pattern can be significantly reduced, and image data can be easily handled.

Next, the color correction processing of FIG. 3 will be described in more detail. As shown in FIG. 1, there is a base coloring layer 2 under the coloring pattern by the sublimation type color toner 4,
When the color pattern designed on the computer is printed as it is on the transfer type coating sheet 13 and transferred without performing the color correction processing, the color of the light-transmissive sublimation type color toner 4 becomes By overlapping with the color, the apparent color of the entire colored pattern is different from the designed original image. Then, a color correction process is performed, and the color of the colored pattern to be printed on the transfer type coating sheet 13 is changed to the color of the base colored layer 2 so that the color of the actually visible colored pattern becomes the same as the color of the original image.
Is changed in advance in accordance with the color of.

In the color correction processing in this example, two types of look-up tables (hereinafter, referred to as LUTs 1 and 2).
Is used. First, the LUT1 is used to determine what color value (XYZ value) of the XYZ color system the CMYK value specified by the design tool is reproduced on the achromatic (white) base color steel plate. Information, once created, is immutable. LUT2 has a certain color value (X
YZ value) on a steel plate with a certain base color,
This is information for determining what CMYK value should be used, and needs to be created for each base color.

FIG. 4 is an explanatory diagram showing a specific method of the color correction processing of FIG. In the actual processing, first, the C ₁ M ₁ Y ₁ K ₁ value of the image is converted into the R ₁ G ₁ B ₁ value using the black component processing parameters. Next, an XYZ value corresponding to the R ₁ G ₁ B ₁ value is obtained using LUT1. After that, L corresponding to the base color
Using UT2, set X so that the apparent colors are the same.
An R ₂ G ₂ B ₂ value is obtained from the YZ value. Then, the R ₂ G ₂ B ₂ value is converted into the C ₂ M ₂ Y ₂ K ₂ value again using the black component processing parameters. The above LUT1 and LUT2 can be integrated, but since the time required for creation increases,
The method of separation was used.

At the stage when the XYZ values are obtained, it is determined whether the color of the color value can be converted to an appropriate R ₂ G ₂ B ₂ value, that is, whether the color can be reproduced on a decorative plate. The location of the portion colored with a different color is displayed on the screen.

Next, a method of creating the LUTs 1 and 2 will be described. XYZ values corresponding to all R ₁ G ₁ B ₁ values in advance,
If the R ₂ G ₂ B ₂ values corresponding to all the XYZ values are calculated, and these correspondences are set as tabular information, that is, LUTs 1 and 2, color correction processing can be performed quickly. When creating such LUTs 1 and 2, first, as shown in FIG. 5, a representative color is selected from colors that can be designated when designing a colored pattern with a computer, and the basic chart 23 is selected.
Create Each rectangular portion of the basic chart 23 represents a representative color, and these rectangular portions are hereinafter referred to as color patches.

Further, since all colors are defined by a combination of three numbers of R, G, and B, when selecting a representative color, all three numbers are not designated but R, G, and B are designated. , B are increased by the same value, for example, by 10, and are automatically obtained as combinations of all the numbers formed at this time. Therefore, if the increment of the RGB values is designated, the color definition information of all the color patches of the basic chart 23 is automatically created. And
From the definition information represented by such a combination of numbers,
Image information of the basic chart 23 is created.

Next, the image information of the basic chart 23 is output to the transfer paper 12 using the electrostatic plotter 11, and a decorative plate is manufactured in the same manner as described above. At this time, two types of decorative plates are manufactured, one having a white colored base layer 2 and another having a chromatic color. As shown in FIG. 6, a chart formed on a decorative plate having a white background color is referred to as a white background chart 24, and a chart formed on the other decorative plate is referred to as a color background chart 25. Next, the color patches on the white background and color background charts 24 and 25 are measured by a colorimeter 26, and the result is taken into a computer. Then, the correspondence between the RGB values of the color patches obtained when the basic chart 23 is created and the colorimetric results is edited.

Thereafter, the correspondence between the RGB values and the pseudo colorimetric values for the colors other than the selected color in the basic chart 23 is determined from the above-mentioned editing result. That is, interpolation is performed. This interpolation need not always be performed as long as the number of selected colors when the basic chart 23 is created is sufficient.

For example, as for the LUT 2, as shown in FIG. 7, a space of color values centered on X value, Y value and Z value is considered. Further, assuming that a step corresponding to the accuracy of the RGB value obtained using the LUT2 is a, the XYZ values of the grid points obtained by cutting each axis at a and the RGB values at that point are components of the LUT2. Now, X of each color patch of the color ground chart 25
The color measurement results of the YZ values are plotted in FIG. At this time, the CMY specified when each color patch was created
The K value (RGB value) is known. Since the colorimetric results do not always overlap the grid points, the colorimetric results close to the grid points are used to calculate the RGB values on the grid points.

There are three types of such calculation methods: the nearest neighbor method, linear interpolation 1, and linear interpolation 2. Among these, the nearest neighbor method is a method in which RGB of a colorimetric value closest to a grid point is set as an RGB value of the grid point.
Processing time is short but accuracy is poor. Also, as shown in FIG. 8, the linear interpolation 1 finds the smallest tetrahedron that includes a grid point inside and has a colorimetric value as a vertex, and performs RGB interpolation of the grid point by linear interpolation from the four colorimetric values that are the vertices. This is a method of obtaining a value, and the processing time is long but the accuracy is excellent. Further, the linear interpolation 2 is a method of obtaining RGB values of a grid point by linear interpolation from four colorimetric values close to the grid point, and the processing time and accuracy are between the above two methods.

As described above, interpolation is performed based on the colorimetric results, and L
UT1 and UT2 are created respectively. Also, LUT2
Since it is necessary to create a new base color for each base color, if it is necessary to add a new base color during operation, an LUT 2 for the base color is additionally created by the same method.

By performing such a color correction process using the LUTs 1 and 2, even if the background color is variously changed, a colored pattern of a desired color can be formed in accordance with the selected background color. Colors can be more reliably and easily reproduced. As described above, when sublimation type color toner 4 is sublimated in transparent resin layer 3, such a toning method is particularly effective because it is easily affected by the underlying color.

Next, the color reproduction determination shown in FIG. 4 will be described. The color ground chart 25 outputs cyan, magenta, yellow, red, green, and blue color patches. In the color value space, the color values included inside the octahedron having these six colors as vertices substantially match the reproducible color values. Therefore, the RGB values are calculated from the XYZ values.
XYZ to be input when creating LUT2 for obtaining values
It is determined whether the value is included in the previous octahedron, and the result is stored in the LUT 2 as color reproduction determination information. If there is a color that cannot be reproduced during the color correction processing, that part is displayed on the screen.

As described above, when there is a display in which color reproduction is not possible, the color is closest to the original image within the reproducible range. For example, partial test printing is performed, and the color shift is within the allowable range. If it is determined that the product is within, the product may be manufactured as it is. In addition, when the display portion where color reproduction is impossible is a main part of the design or has a large area, it is necessary to redesign.

Next, the binarization process of FIG. 3 will be described in more detail. In the divided original image data of FIG. 3, the CMYK value of a certain pixel is 256 gradations (8 bits) for each color.
Is represented by This is set to a threshold of 127 and simply 2
If the binarization (1 bit) is used, the data amount is greatly reduced as described above, but since the dot control of the printer is only on / off, the difference from the original image is large and the binarized data is left as it is. Difficult to use. For example, in a pattern where the density changes gently like a gradation,
Tone discontinuity occurs. This is because the error that occurs between the input data and the output data is simply truncated for each pixel.

Therefore, in the binarization processing, the error generated between the input data and the output data is not simply discarded, but is reflected in the binarization of the unprocessed adjacent pixels. An image having a small error when viewed as a certain area is obtained. Such a method is generally called an error diffusion method.

FIG. 9 is an explanatory diagram showing a simplified principle of the error diffusion method. As shown in FIG. 9A, if the input data of two adjacent pixels is 100 and 112, and if this is simply binarized by the threshold 127, FIG.
It becomes 0,0 as shown in (b). On the other hand, in the error diffusion method, first, the left pixel is binarized to 0 as shown in FIG. 9C, and the error of 100, which is discarded at this time, is added to the adjacent right pixel. As a result, as shown in FIG. 9D, the number of pixels on the right side becomes 212, which is
In the case of binarization, the values are 0 and 1 as shown in FIG.

The input data of the pixel shown in FIG.
112, indicating that this area is an area having a slightly lower density than the threshold 127. In contrast, FIG.
In (e), 0,1 (0,2 if replaced with input data)
55), pixels having a density of 55) are arranged. However, when the entire area is viewed, it looks like an area having a density of about the threshold 127 due to the filtering effect of the human eye. Will also be quite close to the original. Moreover, in the actual error diffusion method, not only the adjacent pixels but also the distance from the processing pixel is weighted, and the error is distributed and diffused to several surrounding pixels, so that the original image is closer to the original image. On the contrary, there is also a method of integrating the processed pixels by weighting the errors of the peripheral processed pixels. By repeating the above-described processing while shifting one pixel at a time in the scanning direction, binarization by the error diffusion method is performed.

Further, for example, when a transfer type coating sheet 13 is prepared from the coloring pattern data as shown in FIG. 10A and the sublimation type color toner 4 is sublimated into the transparent resin layer 3, the phenomenon of sublimation itself is a molecular Because of the diffusion, FIG.
As shown by a circle, the dot diameter increases, and blur due to sublimation occurs. Therefore, for example, if the distance of the blur and the distribution of the density are measured, and the range in which the blur can be confirmed as compared with the original data is integrated for all the pixels, a pseudo area gradation as shown in FIG. 10C is obtained. . In FIG. 10C, the influence of blur gradually increases in the order of a to e. Therefore, correction by error diffusion is performed in consideration of the influence of such blurring in advance.

For the error diffusion method considering such dot overlap, for example, “Recent Pr”
ogres in Digital Halfton
ing ", pages 68-73 (issued by IS & T in 1994).

Further, when the binarization processing is performed by the error diffusion method, the printing result of the calculation result has a characteristic of being easily connected, so that a texture such as a striped pattern may appear. For this reason, in this example, random noise that varies aperiodically within an appropriately set range is added, thereby achieving beautiful gradation expression. As a method of adding random noise, for example, there is a method of randomly varying a threshold value in binarization within a predetermined range.

As described above, the image data of the colored pattern
By creating a value, it is possible to easily create and route image data, and furthermore, by performing color correction processing and error diffusion in consideration of dot overlap,
Reproducibility with respect to the original image can be ensured.

Embodiment 2 In the above example, FIG.
As shown in (a), the colored pattern is divided into a plurality of portions having an appropriate area, and the divided original image data is created for each portion. You can also create data. That is, in normal color printing, four colors of Y, M, C, and K are used as primary colors, and all colors are expressed by their blending ratio. Therefore, the image is divided into images having shades of these primary colors. Divided primary color data can be created.

According to this method, it is possible to see through the entire image, to apply a special effect (so-called filter) by a function to the entire colored pattern, and to further output the primary colors to an output device (for example, the electrostatic plotter shown in FIG. 2). If the adjustment is made according to the characteristics of the primary color of 11), the completed state of the colored pattern can be easily grasped by the screen or another output device.

In the above example, the metal substrate 1 is shown, but the material of the substrate is not limited to metal. Further, in the above example, the transparent resin layer 3 is used as the light-transmitting resin layer.
However, it may be translucent.

[0049]

As described above, in the method for manufacturing a decorative plate according to the first aspect of the present invention, a colored pattern is divided and designed to create divided original image data, and then the binary original image data is converted to binary data. By performing binarization processing to obtain binarized image data and combining a plurality of binarized image data, binarized image data of the entire colored pattern is obtained, and a colored pattern is formed based on the binarized image data. Since printing is performed, the amount of image data for printing the transfer-type coated sheet can be reduced, and creation and management of image data can be facilitated.

According to the decorative plate manufacturing method of the second aspect of the present invention, the colored pattern is divided by an appropriate area, and the divided original image data is created for each part, so that the design work is performed while confirming the color in each part. be able to.

In the method for manufacturing a decorative plate according to the third aspect of the present invention, since the divided original image data is divided and created for each color component of the colored pattern, it can be seen through the entire image, and the entire colored pattern has a function. The special effect can be applied, and if the primary colors are adjusted according to the characteristics of the output device, the completed state of the colored pattern can be easily grasped.

In the method for manufacturing a decorative plate according to the fourth aspect of the present invention, since the binarization process is performed by an error diffusion method in which the effect of sublimation blur due to sublimation of the sublimation-type coloring material is corrected, the data amount is reduced by the binarization. , A highly reproducible colored pattern with less error with respect to the original image can be formed.

The method for manufacturing a decorative plate according to the fifth aspect of the present invention
Since non-periodic random noise is added during the value processing,
Generation of a texture such as a stripe pattern due to error diffusion can be prevented, and reproducibility with respect to the original image can be further improved.

According to the decorative plate manufacturing method of the present invention, the color correction processing is performed on the divided original image data so as to correct the discoloration that occurs when the colored pattern is superimposed on the base color of the base colored layer. Even if the underlying color of the colored layer changes, a colored pattern with high color reproducibility with respect to the original image can be formed.

According to a seventh aspect of the present invention, the C ₁ M ₁ Y ₁ K ₁ value of the pixels constituting the divided original image data is set to R ₁ G _1.
The color correction processing is performed by converting the B ₁ value, the XYZ value, the R ₂ G ₂ B ₂ value, and the C ₂ M ₂ Y ₂ K ₂ value in this order, and the conversion from the R ₁ G ₁ B ₁ value to the XYZ value is performed. , XYZ values are converted to R ₂ G ₂ B ₂ values by using a look-up table which obtains these correspondences in advance and uses tabular information, so that the color correction processing can be performed at high speed.

The method for manufacturing a decorative plate according to the invention of claim 8 is characterized in that:
Assuming that the inside of an octahedron having the chromatic values of the pure colors of cyan, magenta, yellow, red, green and blue in the color value space having the YZ values as coordinates can be reproduced, the reproduction of the original image color is performed by the color correction processing. Since the determination is made, it is possible to know in advance a portion having low reproducibility.

According to a ninth aspect of the present invention, there is provided a method for manufacturing a decorative plate, comprising: defining definition information of a representative color, creating image information of a basic chart from the definition information, measuring RGB values of the basic chart, white background and color ground chart. Since a computer automatically performs operations such as editing of a correspondence relationship with a color result and interpolation, a high-precision lookup table can be easily created.

According to a tenth aspect of the present invention, there is provided a method of manufacturing a transfer type coated sheet, wherein a divided color image is divided and designed to generate divided original image data, and then the divided original image data is subjected to a binarization process to obtain a binary image. Image data and obtain a plurality of 2
By combining the binarized image data, binarized image data of the entire colored pattern is obtained, and the colored pattern is printed based on the binarized image data. Therefore, the amount of image data for printing the transfer-type painted sheet Can be reduced, and creation and handling of image data can be facilitated.

[Brief description of the drawings]

FIG. 1 is a sectional view schematically showing a decorative plate manufactured by a manufacturing method according to a first embodiment of the present invention.

FIG. 2 is an explanatory view showing a method of manufacturing the decorative plate of FIG.

FIG. 3 is an explanatory diagram showing a method of creating image data of a colored pattern according to the first embodiment of the present invention.

FIG. 4 is an explanatory diagram showing a specific method of the color correction processing of FIG. 3;

FIG. 5 is a configuration diagram showing a basic chart for creating the LUTs 1 and 2 of FIG. 4;

6 is a configuration diagram showing a white background and color background chart created from the basic chart of FIG. 5;

FIG. 7 is an explanatory diagram in which the color measurement results of the color ground chart of FIG. 6 are plotted in a color value space.

FIG. 8 is an explanatory diagram for explaining an interpolation process when creating the LUTs 1 and 2 of FIG. 4;

FIG. 9 is an explanatory diagram showing a simplified principle of the error diffusion method performed in the binarization processing of FIG. 3;

FIG. 10 is an explanatory diagram showing the effect of sublimation blur on a colored pattern.

[Explanation of symbols]

1 Substrate, 2 Underlayer coloring layer, 3 Light transmitting resin layer (transparent resin layer), 4 Sublimation type color toner (Sublimation type coloring material),
12 transfer paper, 13 transfer type coating sheet, 23 basic chart, 24 white background chart, 25 color ground chart.

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Kazuto Terada 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsubishi Electric Corporation

Claims (10)

[Claims] 1. A step of forming a light-transmitting resin layer on a substrate via a base colored layer. Dividing a colored pattern on a computer to design and create divided original image data; 2
A step of performing binarization processing to obtain binarized image data and combining the plurality of binarized image data to obtain binarized image data of the entire colored pattern; and binarized image data of the entire colored pattern. Printing the colored pattern with a sublimation-type coloring material based on the above, including a step of manufacturing a transfer-type coating sheet, and a step of sublimating and transferring the sublimation-type coloring material of the transfer-type coating sheet to the light-transmitting resin layer. A method for manufacturing a decorative plate, comprising: 2. The decorative plate manufacturing method according to claim 1, wherein the divided original image data is created by partially dividing a colored pattern. 3. The decorative plate manufacturing method according to claim 1, wherein the divided original image data is created by being divided for each color component of the colored pattern. 4. The method according to claim 1, wherein the binarization processing is performed by an error diffusion method in which a correction for an influence of sublimation blur due to sublimation of the sublimation type coloring material is added. Method of manufacturing decorative plate. 5. The decorative plate manufacturing method according to claim 4, wherein non-periodic random noise is added during the binarization processing. 6. A color correction process is performed on divided original image data so as to correct a discoloration that occurs when a colored pattern is superimposed on a base color of a base color layer. A method for producing a decorative plate according to any one of the claims. 7. The color correction processing includes the steps of converting the C ₁ M ₁ Y ₁ K ₁ values of the pixels constituting the divided original image data into R ₁ G ₁ B ₁ values, XYZ values, R ₂
G ₂ B ₂ value and C ₂ M ₂ Y ₂ K ₂ value are converted in this order and R ₁ G ₁
And conversion into XYZ values from B ₁ value, R ₂ G ₂ B ₂ from XYZ values
7. The method of manufacturing a decorative plate according to claim 6, wherein the conversion into the value is performed using a look-up table in which these correspondences are obtained in advance and are tabulated information. 8. Assuming that the inside of an octahedron having pure color values of cyan, magenta, yellow, red, green and blue as vertices can be reproduced in a color value space having coordinates of XYZ values, color correction processing is performed. The method for manufacturing a decorative plate according to claim 7, wherein it is determined whether or not reproduction of an original image color is possible. 9. A step of, by designating a width in which each value of R, G, B is increased, a look-up table, by computer, creating definition information of a representative color as a combination of all possible numbers. A step of creating, with the computer, image information of a basic chart in which the color patches of the representative colors are arranged from the definition information; and a plurality of transfer-type coated sheets by a sublimation-type coloring material based on the image information of the basic chart. And a light-transmitting resin layer formed on the substrate via a white base coloring layer, and a light-transmitting resin layer formed on another substrate via a non-white base coloring layer. Sublimating and transferring the sublimation-type coloring material of each transfer-type coating sheet to produce a white background chart and a color ground chart; A step of measuring the color of the patch by a colorimeter and editing the correspondence between the RGB values of the basic chart and the colorimetric results by the computer; and performing interpolation on the edited result to select a color other than the color selected in the basic chart. 9. The relation between an RGB value of a color of the color and a color value corresponding to the RBG value is generated by the computer.
The method for producing a decorative plate according to the above. 10. A computer program that divides and designs a colored pattern on a computer to create divided original image data, and then performs binarization processing on the divided original image data to obtain binary image data. Obtaining binarized image data of the entire colored pattern by combining the digitized image data, and printing the colored pattern on transfer paper with a sublimation-type coloring material based on the binarized image data of the entire colored pattern A method for producing a transfer-type coated sheet, comprising the steps of: