Decorative member, resin molding and display device with decoration

Abstract

To provide a decorative member being light transmissible and capable of preventing a display object formed by a coloration of light passing through the decorative member from being inappropriately displayed.SOLUTION: A decorative member 20 includes a first face 20A displaying a design and a second face 20B opposite to the first face 20A. The decorative member 20 includes a decorative layer 30, and a light absorption part 60 in this order from the first face 20A toward the second face 20B. The decorative layer 30 composes a design. The light absorption part 60 is arranged in a prescribed pattern. The light absorption part 60 is overlapped onto the decorative layer 30. The decorative layer 30 at least partially transmits light incident at each location. The decorative layer 30 includes a first layer including a coloring material exhibiting a cyan-based color, a second layer including a coloring material exhibiting a magenta-based color and a third layer including a coloring material exhibiting a yellow-based color. In part of the decorative layer 30, the first layer, the second layer and the third layer overlap.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to a decorative member, a resin molded product having a decorative member, and a decorated display device having a decorative member or a resin molded product. [Background technology]

[0002] Display devices that display objects such as icons are widely used. In display devices, light from a light source is partially blocked by light absorbing parts arranged in a predetermined pattern to form objects. When the objects are not displayed, the display device is usually observed to be black. For example, design is very important for surface components of automobiles, furniture, housing construction materials, etc. Display devices applied in various fields are required not only to simply display objects but also to harmonize their design with the surrounding environment.

[0003] In order to impart a design to a display device, it has been considered to combine the display device with a decorative member. For example, a decorative member as described in International Publication No. 2021 / 002061 can impart a design that harmonizes with the surrounding environment of the display device by forming a design with a decorative layer. A part of the decorative member is semi-transparent so that light can pass through the decorative member and appropriately display the displayed object. DISCLOSURE OF THEINVENTION

[0004] In order to display a design, the decorative member may have different transmittances for different wavelengths at each position of the translucent portion. The light passing through the decorative member may be colored locally or overall. When the decorative layer contains a large amount of a coloring agent that exhibits a black color, such as carbon black, the light passing through the decorative member is likely to be colored. If the light passing through the decorative member is colored, the display formed by the light passing through the decorative member will not be displayed properly. The present disclosure aims to allow the decorative member to transmit light properly.

[0005] This disclosure relates to the following [1] to

[17] . [1] A decorative member having a first surface displaying a design and a second surface opposite to the first surface, A decorative layer forming a design and a light absorbing portion arranged in a predetermined pattern and superimposed on the decorative layer are provided in this order from the first surface to the second surface, The decorative layer transmits at least a portion of the light incident at each position, the decorative layer includes a first layer including a colorant having a cyan color, a second layer including a colorant having a magenta color, and a third layer including a colorant having a yellow color; A decorative member, wherein the first layer, the second layer, and the third layer overlap in a portion of the decorative layer. [2] The decorative member according to [1], wherein the first layer, the second layer, and the third layer each contain a black-based colorant at a concentration of 5% or less. [3] The concentration of the colorant exhibiting a cyan color in the first layer is 60% or more; the concentration of the colorant in the second layer that exhibits a magenta color is greater than 50%; the concentration of the colorant exhibiting a yellow color in the third layer is greater than 50%; The decorative member according to [1] or [2], wherein the portion of the first surface of the decorative member where the first layer is arranged has a dark color. [4] The light absorbing portion further includes a reflective layer disposed between the decorative layer and the light absorbing portion. The decorative member according to any one of [1] to [3], wherein the reflective layer reflects light from the first surface. [5] A decorative member having a first surface displaying a design and a second surface opposite to the first surface, A decorative layer forming a design and an adjustment layer superimposed on the decorative layer are provided in this order from the first surface to the second surface, The decorative layer transmits at least a portion of the light incident at each position, the adjustment layer is a uniform, monochromatic color; A decorative member, in which the ratio of the average transmittance of light in the wavelength range of 500 nm to 700 nm to the average transmittance of light in the wavelength range of 420 nm to 500 nm is 1.0 or more and 1.3 or less. [6] A decorative member having a first surface displaying a design and a second surface opposite to the first surface, A decorative layer forming a design and an adjustment layer superimposed on the decorative layer are provided in this order from the first surface to the second surface, The decorative layer transmits at least a portion of the light incident at each position, the adjustment layer is a uniform, monochromatic color; The decorative layer has an average transmittance of light in the wavelength range of 420 nm or more and 500 nm or less lower than the average transmittance of light in the wavelength range of 500 nm or more and 700 nm or less, The decorative member, wherein the average transmittance of the adjustment layer for light in the wavelength range of 420 nm or more and 500 nm or less is higher than the average transmittance of light in the wavelength range of 500 nm or more and 700 nm or less. [7] The decorative member according to [6], wherein the ratio of the average transmittance of the decorative member for light in the wavelength range of 500 nm to 700 nm to the average transmittance of the decorative member for light in the wavelength range of 420 nm to 500 nm is 1.0 or more and 1.3 or less. [8] Further comprising light absorbing portions arranged in a predetermined pattern and superimposed on the decorative layer, The decorative member according to any one of [5] to [7], wherein the adjustment layer is disposed between the light absorbing portion and the decorative layer. [9] The optical fiber further includes a reflective layer disposed between the decorative layer and the adjustment layer, The decorative member according to any one of [5] to [8], wherein the reflective layer reflects light from the first surface.

[10] The decorative member according to any one of [5] to [9], wherein the thickness of the adjustment layer is 0.5 μm or more and 3.0 μm or less.

[11] the decorative layer includes a first layer including a colorant having a cyan color, a second layer including a colorant having a magenta color, and a third layer including a colorant having a yellow color; The decorative member according to any one of [5] to

[10] , wherein the first layer, the second layer, and the third layer overlap in a portion of the decorative layer.

[12] A decorative member having a first surface displaying a design and a second surface opposite to the first surface, It is provided with a decorative layer that forms a design, The decorative layer transmits at least a portion of the light incident at each position, the decorative layer includes a first layer including a colorant having a cyan color, a colorant having a magenta color, and a colorant having a yellow color; A decorative member, wherein a portion of the decorative layer forms a dark design.

[13] A decorative member having a first surface displaying a design and a second surface opposite to the first surface, It is provided with a decorative layer that forms a design, The decorative layer transmits at least a portion of the light incident at each position, the decorative layer includes a first layer and a second layer including at least one of a colorant exhibiting a magenta color and a colorant exhibiting a yellow color, and a colorant exhibiting a cyan color; in the second layer, a concentration of at least one of a colorant exhibiting a magenta color and a colorant exhibiting a yellow color is greater than a concentration of a colorant exhibiting a cyan color; a portion of the first surface of the decorative member where the first layer is disposed has a dark color; A decorative member, wherein the first layer and the second layer overlap in a portion of the decorative layer.

[14] The decorative member according to any one of [1] to

[13] , wherein the decorative layer further includes a solid layer that is a uniform monochromatic color throughout the entire decorative layer.

[15] The decorative layer forms a wood grain design including a vessel pattern, The decorative member according to any one of [1] to [4],

[11] or

[13] , wherein the first layer is arranged to correspond to the vascular pattern.

[16] A decorative member according to any one of [1] to

[15] , a molded resin layer overlaid on the second surface of the decorative member.

[17] [1] to

[15] or the resin molded product according to

[16] ; a light source disposed closer to the second surface than to the first surface.

[0006] According to the present disclosure, light can be appropriately transmitted through the decorative member. [Brief description of the drawings]

[0007] [Figure 1] FIG. 1 is a cross-sectional view showing an example of a decorated display device according to the present disclosure. [Diagram 2] FIG. 2 is an enlarged cross-sectional view showing the decorative layer of the decorative member of FIG. [Diagram 3] FIG. 3 is a cross-sectional view showing a further enlarged view of the decorative layer of FIG. [Figure 4] FIG. 4 is an enlarged cross-sectional view showing the reflective layer. [Diagram 5] FIG. 5 is a front view showing a state in which the decorated display device is not displaying an object. [Figure 6] FIG. 6 is a front view showing a state in which the decorated display device displays an object. [Figure 7] FIG. 7 is a diagram for explaining an example of a method for manufacturing a decorative member. [Figure 8] FIG. 8 is a diagram for explaining an example of a method for manufacturing a decorative member. [Figure 9] FIG. 9 is a diagram for explaining another example of the method for manufacturing the decorative member. [Figure 10] FIG. 10 is a cross-sectional view corresponding to FIG. 3, showing a modified example of the decorative layer. [Figure 11]FIG. 11 is a cross-sectional view corresponding to FIG. 3, showing another modified example of the decorative layer. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] An embodiment of the present invention will be described with reference to the drawings. The scale and aspect ratios in the drawings attached to this specification are changed and exaggerated from those of the actual objects for ease of illustration and understanding.

[0009] FIG. 1 is a cross-sectional view that shows a schematic diagram of a decorated display device 1 of the present embodiment. As shown in FIG. 1, the decorated display device 1 has a light source 5 and a resin molded product 10. The resin molded product 10 has a molded resin layer 11 and a decorative member 20. The decorative member 20 is plate-shaped. The decorative member 20 has a first surface 20A and a second surface 20B. The second surface 20B is the surface opposite to the first surface 20A. The first surface 20A and the second surface 20B are plate surfaces of the decorative member 20. The decorative member 20 displays a design on the first surface 20A. The molded resin layer 11 is overlaid on the second surface 20B of the decorative member 20. The decorative member 20 includes a first area A1 that easily transmits light and a second area A2 that does not easily transmit light. The second area A2 has a predetermined pattern that corresponds to an object displayed by the decorated display device 1. When the light source 5 is not emitting light, the decorated display device 1 displays the design imparted by the decorative member 20 throughout its entirety. The design displayed by the decorated display device 1 includes a plurality of chromatic colors. The decorated display device 1 displays, for example, a wood grain design including a vascular pattern. The decorated display device 1 may display other designs. When the light source 5 is emitting light, the decorated display device 1 can display an object due to the pattern of the second area A2. In the second area A2, which is difficult for light to transmit, the decorated display device 1 displays the design imparted by the decorative member 20 even when the light source 5 is emitting light.

[0010] In the illustrated example, the resin molded article 10 is shown in a flat plate shape, but the resin molded article 10 may have a desired shape by following the shape of a molding die used when forming the molded resin layer 11. For example, the resin molded article 10 may be curved or bent so as to have a concave shape, a convex shape, or both.

[0011] 1, the decorative member 20 has, from the first surface 20A to the second surface 20B, a decorative layer 30, a reflective layer 40, an adjustment layer 50, a light absorbing section 60, and a transparent resin layer 70, in this order. The adjustment layer 50 and the light absorbing section 60 are superimposed on the decorative layer 30. The reflective layer 40 and the adjustment layer 50 are disposed between the decorative layer 30 and the light absorbing section 60. The reflective layer 40 is disposed between the decorative layer 30 and the adjustment layer 50. The light absorbing section 60 is disposed in the second area A2.

[0012] The decorative member 20 may have other layers (not shown). For example, the decorative member 20 may have a layer for surface protection and an adhesive layer for bonding each layer together.

[0013] The light source 5 irradiates light onto the decorative member 20. In the example shown in FIG. 1, the light source 5 is disposed closer to the second surface 20B of the decorative member 20 than the first surface 20A. In other words, the light source 5 is disposed closer to the light absorbing portion 60 or the adjustment layer 50 than the decorative layer 30 of the decorative member 20. The light source 5 irradiates light onto the second surface 20B of the decorative member 20. The light source 5 irradiates light onto the decorative member 20 from closer to the light absorbing portion 60 or the adjustment layer 50 than the decorative layer 30. A part of the light irradiated onto the decorative member 20 is absorbed by the light absorbing portion 60, and another part is transmitted through the first area A1 of the decorative member 20, thereby displaying an object. For the light source 5, in order to make the intensity of the light transmitted through the decorative member 20 uniform, it is preferable to use, for example, a surface light source device that emits light in a planar manner. The light source 5 is, for example, an LED.

[0014] The molded resin layer 11 supports the decorative member 20. The molded resin layer 11 is transparent. The molded resin layer 11 does not easily interfere with the light from the light source 5 or the design displayed by the decorative member 20. The molded resin layer 11 is provided by in-mold molding or insert molding. By molding, the molded resin layer 11 can be provided in a desired shape. The material of the molded resin layer 11 is, for example, glass or a resin such as acrylic, polycarbonate, ABS, PET, or polypropylene.

[0015] As used herein, "transparent" means that the visible light transmittance, which is specified as the average value of the transmittance at each wavelength when measured at 0.5 nm intervals in the range of measurement wavelengths from 380 nm to 780 nm using a spectrophotometer (Hitachi UH4150 standard integrating sphere type), is 50% or more, preferably 80% or more. The spectrophotometer uses a two-hole Φ60 mm standard full spherical integrating sphere. When the transmission direction is not particularly specified, the incident angle when measuring the visible light transmittance is set to 0°. The incident angle is the angle made by the direction of travel of the incident light with respect to the normal direction to the incident surface, and is a value less than 90°. When the area of ​​the target measurement location is small and smaller than the measurement area of ​​the device, it is judged by comparing it with an object such as a film whose transmittance has been already measured by the above measurement method and is known. For example, prepare films with transmittances of 60% and 90%, and visually check the brightness of the film and the clarity of the LED light source when an LED light is irradiated from the opposite side of the film to be viewed. At the same time, a similar LED light source is irradiated from the opposite side of the film to be viewed and visually checked for comparison. If the transmittance of the measurement point is higher than 60% of the known film and lower than the transmittance of the known film at 90%, the transmittance of the measurement point is judged to be between 60% and 90%. The size of the LED light source is preferably close to the area of ​​the measurement point for visual confirmation. For example, if the width of the measurement point is 5 mm, the size of the LED light source should be 2 to 10 mm in diameter for a circle, or 2 to 5 mm in length for a rectangular solid. The distance between the LED light source and the target object is preferably 50 mm or less. Furthermore, if the distance is 5 to 10 mm and the LED light source size is as stated above, the shape of the LED light source can be confirmed when the LED light is transmitted and visually checked, making it easier to compare the transmittance.

[0016] The decorative member 20 displays a design on the first surface 20A, imparting a design to the decorated display device 1. To display an excellent design, the design displayed by the decorative member 20 preferably includes a plurality of chromatic colors. The decorative member 20 transmits a portion of the light from the light source 5.

[0017] The decorative layer 30 forms a design displayed by the decorative member 20. More specifically, the design formed by the decorative layer 30 is observed from the outside by reflecting light incident on the decorative layer 30 from the outside. The decorative layer 30 can form designs such as figures, patterns, designs, colors, pictures, photographs, characters, marks, pictograms, letters, and numbers. As designs that can harmonize with the surrounding environment in which the decorated display device 1 is installed, the decorative layer 30 can form, for example, wood grain or marble patterns or geometric patterns. In particular, the decorative layer 30 can form a wood grain design including a vessel pattern. It is preferable that the decorative layer 30 forms a design including a plurality of chromatic colors so as to form an excellent design.

[0018] The decorative layer 30 can transmit at least a part of the light incident at each position. The decorative layer 30 can transmit the light from the light source 5 at each position. The decorative layer 30 may have a portion that transmits all of the incident light. A portion of the decorative layer 30 may be transparent. The decorative layer 30 may have a different transmittance for each wavelength at each position in order to form a design. For example, when the decorative layer 30 forms a wood grain design including a vessel pattern, the transmittance is lower in the vessel pattern portion than in other portions. For example, when the decorative layer 30 forms a wood grain design including a vessel pattern, the average transmittance of the decorative layer 30 for light in the wavelength range of 420 nm to 500 nm is lower than the average transmittance of light in the wavelength range of 500 nm to 700 nm. The ratio of the average transmittance of the decorative layer 30 for light in the wavelength range of 420 nm to 500 nm to the average transmittance of light in the wavelength range of 500 nm to 700 nm is 1.4 to 2.4.

[0019] In this specification, the transmittance of the target component is measured by measuring the transmittance for each wavelength using a spectrophotometer (Hitachi UH4150 standard integrating sphere type). A two-hole Φ60mm standard full-sphere integrating sphere is used. A D65 light source is used as the light source during measurement. The average transmittance is specified as the average of the transmittance measured at every 0.5 nm wavelength.

[0020] 2 shows an enlarged view of the decorative layer 30 in the decorative member 20. The decorative layer 30 includes a plurality of layers each having a different color to form a desired color design. Specifically, as shown in FIG. 2, the decorative layer 30 includes a first layer 31 including a colorant having a cyan color, a second layer 32 including a colorant having a magenta color, and a third layer 33 including a colorant having a yellow color. The decorative layer 30 may include only the first layer 31, the second layer 32, and the third layer 33.

[0021] In Fig. 3, the decorative layer 30 is further enlarged. As shown in Fig. 3, the first layer 31 contains a first binder resin 31a and a first colorant 31b that is encapsulated in the first binder resin 31a and has a cyan color. The second layer 32 contains a second binder resin 32a and a second colorant 32b that is encapsulated in the second binder resin 32a and has a magenta color. The third layer 33 contains a third binder resin 33a and a third colorant 33b that is encapsulated in the third binder resin 33a and has a yellow color.

[0022] The first binder resin 31a, the second binder resin 32a, and the third binder resin 33a are, for example, a resin such as a urethane resin, an acrylic polyol resin, an acrylic resin, an ester resin, an amide resin, a butyral resin, a styrene resin, a urethane-acrylic copolymer, a vinyl chloride-vinyl acetate copolymer resin, a vinyl chloride-vinyl acetate-acrylic copolymer resin, a chlorinated propylene resin, a nitrocellulose resin, or a cellulose acetate resin.

[0023] The first colorant 31b is a pigment or organic filler of a cyan color, such as phthalocyanine blue. The range of the maximum absorption wavelength of the first colorant 31b in the visible region is 600 nm or more. The second colorant 32b is a pigment or organic filler of a magenta color, such as quinacridone. The range of the maximum absorption wavelength of the second colorant 32b in the visible region is 480 nm or more and less than 600 nm. The third colorant 33b is a pigment or organic filler of a yellow color, such as isoindolinone. The range of the maximum absorption wavelength of the third colorant 33b in the visible region is less than 480 nm.

[0024] The first layer 31, the second layer 32, and the third layer 33 may contain colorants that exhibit other types of colors, but they contain almost no colorants that exhibit black-based colors. The concentration of the colorants that exhibit black-based colors contained in the first layer 31, the second layer 32, and the third layer 33 may be 5% or less, 3% or less, 1% or less, or 0.5% or less. The first layer 31, the second layer 32, and the third layer 33 may not contain colorants that exhibit black-based colors. The concentration of the first colorant 31b that exhibits a cyan-based color in the first layer 31 may be 60% or more. The concentration of the second colorant 32b that exhibits a magenta-based color in the second layer 32 may be more than 50%. The concentration of the third colorant 33b that exhibits a yellow-based color in the third layer 33 may be more than 50%. In the second layer 32, the concentration of the colorant that imparts a cyan color is lower than the concentration of the colorant that imparts a yellow color. In the third layer 33, the concentration of the colorant that imparts a cyan color is lower than the concentration of the colorant that imparts a magenta color.

[0025] The concentration of the colorant in each layer indicates the weight ratio of each colorant to the total weight of the colorants in each layer. The concentration of the colorant is measured by cutting out a cross section of each layer, observing the cross section of the layer under a magnifying microscope, and comparing the area of ​​each colorant in the observed area. The area ratio of each colorant is regarded as the volume ratio, and the weight ratio of each colorant is calculated based on the molecular weight of the material of each colorant. The weight ratio of each colorant is calculated for the three cross sections, and the calculated weight ratio values ​​for each cross section are averaged, and the averaged value is regarded as the weight ratio of each colorant.

[0026] The transmittance of each of the first layer 31, the second layer 32, and the third layer 33 is, for example, 30% or more and 70% or less. The thickness of each of the first layer 31, the second layer 32, and the third layer 33 is, for example, 1.0 μm or more and 3.0 μm or less.

[0027] The first layer 31, the second layer 32, and the third layer 33 are appropriately overlapped, so that the decorative layer 30 can present a desired color. The first layer 31, the second layer 32, and the third layer 33 are appropriately arranged at each position of the decorative layer 30 according to the design formed by the decorative layer 30. For example, in a certain part of the decorative layer 30, only one of the first layer 31, the second layer 32, and the third layer 33 is arranged. In another part of the decorative layer 30, any two of the first layer 31, the second layer 32, and the third layer 33 are arranged overlapping. In yet another part of the decorative layer 30, the first layer 31, the second layer 32, and the third layer 33 are overlapped. In particular, by overlapping the first layer 31, the second layer 32, and the third layer 33, the decorative layer 30 can present a dark color without containing almost any black layer such as carbon black. For example, when the decorative layer 30 forms a wood grain design including a dark vascular pattern, the first layer 31, the second layer 32, and the third layer 33 are arranged to overlap at a position corresponding to the vascular pattern.

[0028] In this specification, a dark color refers to a color having low lightness and saturation. Specifically, in the color chart (COLOR FINDER of TOYO INK), all colors in the Dryish tone, all colors in the Dark tone, all colors in the Dark Graish tone, CF10547, CF10548, CF10744 in the Light Graish tone, CF10823, CF10838, CF10842, CF10843, CF10845, CF10848, CF10868, CF10885, CF10899, CF10901, CF10935, CF10941, CF10942, CF10949, CF10950, CF10978 in the Dull tone, CF10804, CF10808, CF10832, CF10837, CF10839, CF10910, CF10916, CF10918, CF10931, CF10932, CF10933, CF10948, CF10954, CF10960, CF10971, CF10976, CF10981. In this specification, colors are specified as the closest color on a color chart (COLOR FINDER by TOYO INK Co., Ltd.).

[0029] When the concentration of the colorant that presents a cyan color in the first layer 31 is 60%, a dark color can be presented by the first layer 31. On the first surface 20A of the decorative member 20, the portion where the first layer 31 is arranged presents a dark color.

[0030] The first layer 31, the second layer 32, and the third layer 33 are not provided on the entirety of the decorative layer 30. The first layer 31, the second layer 32, and the third layer 33 are provided on only a part of the decorative layer 30.

[0031] The reflective layer 40 reflects the light from the first surface 20A that has passed through the decorative layer 30. The reflective layer 40 is disposed between the decorative layer 30 and the adjustment layer 50 so that the light that has passed through the decorative layer 30 is not reflected after passing through the adjustment layer 50. The reflective layer 40 is disposed between the decorative layer 30 and the light absorbing portion 60 so that the reflected light is not obstructed by the light absorbing portion 60. The reflectance of the reflective layer 40 is, for example, 30% or more and 80% or less. The transmittance of the reflective layer 40 is, for example, 20% or more and 70% or less. The thickness of the reflective layer 40 is, for example, 1.0 μm or more and 3.0 μm or less. The reflective layer 40 is white or silver, which is easy to avoid mixing with the decorative layer 30. The reflective layer 40 contains, for example, flaky aluminum to reflect light with an appropriate reflectance.

[0032] 4 shows an enlarged cross-sectional view of the reflective layer 40. As shown in FIG. 4, the reflective layer 40 may include a reflective portion 41 and a reflectance adjusting portion 42 that adjusts the reflectance of the reflective layer 40. The reflective portion 41 includes, for example, flaky aluminum. The reflectance adjusting portion 42 includes a white pigment such as titanium oxide. The reflectance adjusting portion 42 is disposed closer to the decorative layer 30 than the reflective portion 41, in other words, closer to the first surface 20A.

[0033] In this specification, the reflectance of the target member is measured by measuring the reflectance for each wavelength using a spectrophotometer (Konica Minolta "CM-3700A") A D65 light source is used as the light source during the measurement.

[0034] The decorative layer 30 may have different transmittances for different wavelengths in order to form a design. The adjustment layer 50 adjusts the transmittance of the decorative member 20 so that the difference in transmittance for each wavelength of the decorative member 20 is small. The adjustment layer 50 has a color that is complementary to the decorative layer 30. Specifically, the ratio of the average transmittance of light in the wavelength range of 500 nm to 700 nm to the average transmittance of light in the wavelength range of 420 nm to 500 nm is almost inverse between the decorative layer 30 and the adjustment layer 50. For example, when the decorative layer 30 forms a wood grain design including a vessel pattern, the average transmittance of the adjustment layer 50 for light in the wavelength range of 420 nm to 500 nm is higher than the average transmittance of light in the wavelength range of 500 nm to 700 nm in accordance with the decorative layer 30. Such an adjustment layer 50 provides a ratio of the average transmittance of the decorative member 20 for light in the wavelength range of 500 nm to 700 nm to the average transmittance of light in the wavelength range of 420 nm to 500 nm of 1.0 to 1.3.

[0035] The adjustment layer 50 has a uniform monochromatic color. The adjustment layer 50 contains a pigment or an organic filler that corresponds to the color of the design formed by the decorative layer 30 so as to be a complementary color of the decorative layer 30. The pigment or organic filler that the adjustment layer 50 may contain is, for example, phthalocyanine blue.

[0036] The adjustment layer 50 is disposed between the decorative layer 30 and the light absorbing portion 60 so as to adjust the transmittance of the decorative member 20 without being hindered by the light absorbing portion 60. The reflective layer 40 is disposed between the decorative layer 30 and the adjustment layer 50 so as not to hinder the design formed by the decorative layer 30 with the adjustment layer 50. The thickness of the adjustment layer 50 is 0.5 μm or more and 3.0 μm or less.

[0037] The light absorbing portion 60 absorbs light from the light source 5. The transmittance of the light absorbing portion 60 is, for example, 0.1% or less. The light absorbing portion 60 is arranged in a predetermined pattern so as to overlap the second area A2. The pattern in which the light absorbing portion 60 is arranged corresponds to the shape of the display object displayed by the decorated display device 1. The first area A1 where the light absorbing portion 60 is not arranged allows light to easily transmit, and the second area A2 where the light absorbing portion 60 is arranged allows light to be less easily transmitted, thereby forming a display object such as an icon displayed by the decorated display device 1. The light absorbing portion 60 is arranged closer to the light source 5 than the decorative layer 30. In the example shown in FIG. 1, the light absorbing portion 60 is provided so as to be embedded in the transparent resin layer 70. The thickness of the light absorbing portion 60 is 1.0 μm or more and 10 μm or less. The light absorbing portion 60 contains, for example, carbon black as a material that absorbs light.

[0038] The molded resin layer 11 can be provided by various molding methods. When the molded resin layer 11 is provided by in-mold molding, the transparent resin layer 70 bonds the decorative member 20 to the molded resin layer 11. The transparent resin layer 70 is a so-called adhesive layer. The adhesive layer is provided on the outermost surface of the decorative sheet on the molded resin layer side as necessary for the purpose of improving the adhesion and adhesion between the decorative sheet and the molded resin. The resin forming the adhesive layer is not particularly limited as long as it can improve the adhesion and adhesion between the decorative sheet and the molded resin. For example, a thermoplastic resin is used as the resin forming the adhesive layer. For example, the thermoplastic resin is an acrylic resin, an acrylic modified polyolefin resin, a chlorinated polyolefin resin, a vinyl chloride-vinyl acetate copolymer, a thermoplastic urethane resin, a thermoplastic polyester resin, a polyamide resin, or a rubber-based resin. The thermoplastic resin may be used alone or in combination of two or more types.

[0039] Alternatively, when the molded resin layer 11 is provided by insert molding, the transparent resin layer 70 supports each component of the decorative member 20. The transparent resin layer 70 allows the decorative member 20 to have an appropriate thickness for handling. The transparent resin layer 70 is a transparent film-like member. The material of the transparent resin layer 70 is, for example, acrylic. The transparent resin layer 70 has a thickness of, for example, 10 μm or more and 500 μm or less.

[0040] The operation of the decorated display device 1 of this embodiment will be described below. In Fig. 2, light L21 from the outside and light L22 from the light source 5 that are incident on the decorative member 20 are shown.

[0041] The light L21 from the outside incident on the first surface 20A of the decorative member 20 is transmitted through each layer included in the decorative layer 30 at each position. The light L21 shown in FIG. 2 is transmitted through three layers in the decorative layer 30, namely the first layer 31, the second layer 32, and the third layer 33. The light L21 transmitted through the decorative layer 30 is reflected by the reflective layer 40. The light incident on the first surface 20A of the decorative member 20 is unlikely to be incident on the adjustment layer 50 and the light absorbing portion 60. The adjustment layer 50 and the light absorbing portion 60 are unlikely to be observed by the light incident on the first surface 20A of the decorative member 20. The light L21 reflected by the reflective layer 40 is transmitted through each layer included in the decorative layer 30 again. After that, the light L21 is emitted to the outside of the decorative member 20 and observed by an external observer. The light L21 transmitted through each layer included in the decorative layer 30 is transmitted through the decorative layer 30 twice, and is therefore clearly observed in a color corresponding to each layer of the decorative layer 30 through which it has passed. In particular, the light L21 transmitted through the first layer 31, the second layer 32, and the third layer 33 is observed in a dark color. For example, the vascular pattern in the wood grain design is observed in a dark color. As a result, when the light source 5 is not irradiating light, as shown in FIG. 5, the decorated display device 1 displays the design intended to be observed in its entirety. The displayed design allows the decorated display device 1 to blend in with the surrounding environment.

[0042] The light L22 emitted from the light source 5 passes through the decorative member 20 in the first area A1. The light L22 passes through at least one of the first layer 31, the second layer 32, and the third layer 33 in the first area A1 according to the design formed by the decorative layer 30. The light L22 shown in FIG. 2 passes through three layers in the decorative layer 30, the first layer 31, the second layer 32, and the third layer 33. The transmitted light L22 is emitted to the outside of the decorative member 20 and is observed by an external observer. Since the light L22 passes through the decorative layer 30 only once, it is difficult to observe the color corresponding to each layer of the decorative layer 30 even if it passes through the decorative layer 30. In the second area A2, the light L22 is absorbed by the light absorbing portion 60. When light is emitted from the light source 5, the light emitted from the light source 5 easily passes through the first area A1 of the decorative member 20 and does not easily pass through the second area A2, so that the decorated display device 1 displays an object, as shown in Fig. 6. As shown in Fig. 6, in the second area A2, the decorated display device 1 displays a design that is intended to be observed.

[0043] An example of a manufacturing method of a resin molded product 10 having a decorative member 20 will be described. As shown in FIG. 7, a release layer 22 made of, for example, polyethylene terephthalate that has been subjected to a release treatment is provided on a base material 21 made of, for example, acrylic. A decorative layer 30 is provided on the release layer 22, for example, by printing. The decorative layer 30 is provided by printing a first layer containing a colorant that exhibits a cyan color, a second layer containing a colorant that exhibits a magenta color, and a third layer containing a colorant that exhibits a yellow color in that order. The decorative layer 30 is provided so as to form a desired design. A reflective layer 40 containing flaky aluminum is provided on the decorative layer 30, for example, by printing. An adjustment layer 50 is provided on the reflective layer 40, for example, by printing. A light absorbing portion 60 is formed on the adjustment layer 50, for example, by printing, in a predetermined pattern corresponding to the display object. A transparent resin layer 70 is provided so as to cover the light absorbing portion 60. The transparent resin layer 70 has adhesive properties.

[0044] By in-mold molding, a molded resin layer 11 is provided by adhering it to a transparent resin layer 70, as shown in Fig. 8. The release layer 22 is released from the decorative layer 30. The substrate 21 and the release layer 22 are removed. By the above steps, a resin molded product 10 having the decorative member 20 shown in Fig. 1 is manufactured.

[0045] Another example of a method for manufacturing a resin molded product 10 having a decorative member 20 will be described. As shown in FIG. 9, a decorative layer 30 is provided on a substrate 23 made of, for example, acrylic or ionizing radiation curable resin, for example, by printing. The decorative layer 30 is provided by printing a first layer containing a colorant having a cyan color, a second layer containing a colorant having a magenta color, and a third layer containing a colorant having a yellow color, in that order. The decorative layer 30 is provided so as to form a desired design. A reflective layer 40 containing flaky aluminum is provided on the decorative layer 30, for example, by printing. An adjustment layer 50 is provided on the reflective layer 40, for example, by printing. A light absorbing portion 60 is formed on the adjustment layer 50, for example, by printing, in a predetermined pattern corresponding to the display object. A transparent resin layer 70 is provided so as to cover the light absorbing portion 60.

[0046] By insert molding, the molded resin layer 11 is provided on the transparent resin layer 70. Through the above steps, the resin molded product 10 having the decorative member 20 shown in Fig. 1 is manufactured. The base material 23 serves as a surface protection layer for the decorative member 20, which is not shown in Fig. 1.

[0047] Conventional decorative members use a large amount of black pigment such as carbon black to display dark parts of a design, for example, dark parts. If the design displayed by the decorative member has dark parts, the transmittance of the dark parts will be lower than that of other parts. For example, if the decorative member displays a wood grain design, the transmittance of the wood grain vascular pattern part will be lower than that of other parts. Such parts may unintentionally block light from a light source. If the transmittance of each part of the decorative member differs greatly depending on the color of the design, the decorative member cannot transmit light appropriately, and even if an object is displayed using light from a light source, the object will be observed to be colored.

[0048] Decorative materials can display designs in chromatic colors because the transmittance varies for each wavelength. Conventional decorative materials have different transmittances for each wavelength, so when light from a light source passes through the decorative material, the light cannot be properly transmitted through the decorative material, and the decorative material may be colored in the color of the design it displays. The displayed object is observed to be a color different from the intended color.

[0049] Depending on the design displayed by the decorative member, the light passing through the decorative member may be colored locally or overall. If the decorative member is not able to transmit light appropriately, the displayed object may not be displayed properly depending on the design displayed by the decorative member.

[0050] In order to properly transmit light through the decorative member and properly display the displayed object, it has been considered to thin the decorative layer that forms the design of the decorative member. However, if the decorative layer that forms the design of the decorative member is made thin, the decorative member will not be able to properly display the design.

[0051] In the decorative member 20 of this embodiment, the decorative layer 30 includes a first layer 31 that exhibits a cyan color, a second layer 32 that exhibits a magenta color, and a third layer 33 that exhibits a yellow color. By overlapping the first layer 31, the second layer 32, and the third layer 33, the first layer 31, the second layer 32, and the third layer 33 can form a dark color part, for example, a dark color part, in the design formed by the decorative layer 30, without the first layer 31, the second layer 32, and the third layer 33 containing almost no black colorant such as carbon black. The first layer 31, the second layer 32, and the third layer 33 have a higher transmittance than a black layer using carbon black or the like, and therefore can transmit light appropriately through the decorative member 20. The decorated display device 1 having the decorative member 20 can appropriately display a display object.

[0052] The concentration of the colorant that exhibits a cyan color in the first layer 31 is 60% or more. The first layer 31 can clearly exhibit a dark cyan color. The concentration of the colorant that exhibits a magenta color in the second layer 32 is greater than 50%. The second layer 32 can clearly exhibit a magenta color. The concentration of the colorant that exhibits a yellow color in the third layer 33 is greater than 50%. The third layer 33 can clearly exhibit a yellow color. In the first surface 20A of the decorative member 20, the portion where the first layer 31 is disposed exhibits a dark color. While improving the color of the design displayed by the decorative layer 30, the first layer 31, the second layer 32, and the third layer 33 hardly contain a colorant that exhibits a black color such as carbon black, and a dark color portion can be formed in the design formed by the decorative layer 30.

[0053] The decorative member 20 of the present embodiment has an adjustment layer 50. The ratio of the average transmittance of light in the wavelength range of 500 nm to 700 nm to the average transmittance of light in the wavelength range of 420 nm to 500 nm is almost the inverse ratio between the decorative layer 30 and the adjustment layer 50. The adjustment layer 50 allows the ratio of the average transmittance of light in the wavelength range of 500 nm to 700 nm to the average transmittance of light in the wavelength range of 420 nm to 500 nm of the decorative member 20 to be 1.0 to 1.3. There is almost no difference in transmittance for each wavelength in the entire decorative member 20. Even if light from the light source 5 passes through the decorative member 20, it is unlikely to be colored by the color of the design displayed by the decorative member. Light can be properly transmitted through the decorative member 20. The decorated display device 1 having the decorative member 20 can properly display the displayed object.

[0054] The average transmittance of the decorative layer 30 for light in the wavelength range of 420 nm to 500 nm is lower than the average transmittance of light in the wavelength range of 500 nm to 700 nm, and the average transmittance of the adjustment layer 50 for light in the wavelength range of 420 nm to 500 nm is higher than the average transmittance of light in the wavelength range of 500 nm to 700 nm. The difference in transmittance for each wavelength is small throughout the decorative member 20. Even if light from the light source 5 passes through the decorative member 20, it is unlikely to be colored by the color of the design displayed by the decorative member 20. Light can be properly transmitted through the decorative member 20. A decorated display device 1 having the decorative member 20 can properly display an object.

[0055] The adjustment layer 50 has a uniform, monochromatic color. The adjustment layer 50 can appropriately transmit light to the decorative member 20 with a simple structure.

[0056] The decorative member 20 has a reflective layer 40. The reflective layer 40 is disposed between the decorative layer 30 and the light absorbing portion 60, between the decorative layer 30 and the adjustment layer 50. With this arrangement, the light transmitted through the decorative layer 30 is not reflected after transmitting through the adjustment layer 50, and the light reflected by the reflective layer 40 is not obstructed by the light absorbing portion 60. The adjustment layer 50 and the light absorbing portion 60 are prevented from being observed by the light incident from the first surface 20A of the decorative member 20. The light transmitted through the decorative layer 30 is reflected by the reflective layer 40, so that the light is transmitted through the decorative layer 30 twice. The design formed by the decorative layer 30 is clearly observed in the color corresponding to each layer of the decorative layer 30 that has been transmitted. Since the transmittance of the reflective layer 40 is sufficiently high, the reflective layer 40 does not obstruct the light from the light source 5.

[0057] The thickness of the adjustment layer 50 is 0.5 μm or more and 3.0 μm or less. Since the adjustment layer 50 has an appropriate thickness, the difference in transmittance for each wavelength of the entire decorative member 20 can be appropriately reduced. The light from the light source 5 is not easily colored by the decorative member 20. The light can be appropriately transmitted through the decorative member 20.

[0058] The decorative member 20 of this embodiment has a first surface 20A that displays a design and a second surface 20B opposite to the first surface 20A. The decorative member 20 includes, in this order from the first surface 20A toward the second surface 20B, a decorative layer 30 that forms a design, and a light absorbing portion 60 that is arranged in a predetermined pattern and superimposed on the decorative layer 30. The decorative layer 30 transmits at least a portion of the light incident at each position. The decorative layer 30 includes a first layer 31 that exhibits a cyan color, a second layer 32 that exhibits a magenta color, and a third layer 33 that exhibits a yellow color. The first layer 31, the second layer 32, and the third layer 33 are superimposed in a portion of the decorative layer 30. The first layer 31, the second layer 32, and the third layer 33 have a higher transmittance than a black layer such as carbon black, and therefore can transmit light appropriately through the decorative member 20.

[0059] The decorative member 20 of this embodiment has a first surface 20A that displays a design and a second surface 20B opposite to the first surface 20A. The decorative member 20 includes, in this order from the first surface 20A toward the second surface 20B, a decorative layer 30 that forms a design, and an adjustment layer 50 that is overlaid on the decorative layer 30. The decorative layer 30 transmits at least a part of the light that is incident at each position. The adjustment layer 50 is a uniform monochromatic color. The ratio of the average transmittance of light in the wavelength range of 500 nm to 700 nm to the average transmittance of light in the wavelength range of 420 nm to 500 nm of the decorative member 20 is 1.0 to 1.3. There is almost no difference in transmittance for each wavelength in the entire decorative member 20. Even if light from the light source 5 passes through the decorative member 20, it is unlikely to be colored by the color of the design displayed by the decorative member. Light can be appropriately transmitted through the decorative member 20.

[0060] The decorative member 20 of this embodiment has a first surface 20A that displays a design and a second surface 20B opposite to the first surface 20A. The decorative member 20 includes, in this order from the first surface 20A toward the second surface 20B, a decorative layer 30 that forms a design, and an adjustment layer 50 that is overlaid on the decorative layer 30. The decorative layer 30 transmits at least a portion of the light that is incident at each position. The adjustment layer 50 is a uniform monochromatic color. The average transmittance of the decorative layer 30 for light in the wavelength range of 420 nm to 500 nm is lower than the average transmittance of light in the wavelength range of 500 nm to 700 nm. The average transmittance of the adjustment layer 50 for light in the wavelength range of 420 nm to 500 nm is higher than the average transmittance of light in the wavelength range of 500 nm to 700 nm. The difference in transmittance for each wavelength is small throughout the decorative member 20. Even if the light from the light source 5 passes through the decorative member 20, it is unlikely to be colored by the color of the design displayed by the decorative member. The light can be appropriately transmitted through the decorative member 20.

[0061] The aspects of the present disclosure are not limited to the above-described embodiment, but include various modifications that may be conceived by a person skilled in the art, and the effects of the present disclosure are not limited to the above-described contents. In other words, various additions, modifications, and partial deletions are possible within the scope of the conceptual idea and intent of the present disclosure derived from the contents defined in the claims and their equivalents.

[0062] In the embodiment described above, the decorative layer 30 includes a first layer 31 having a cyan color, a second layer 32 having a magenta color, and a third layer 33 having a yellow color. In the decorative layer 30, one of the second layer 32 and the third layer 33 may be omitted. When the second layer 32 is omitted, at least one of the first layer 31 and the third layer 33 may further include a second colorant 32b having a magenta color. When the third layer 33 is omitted, at least one of the first layer 31 and the second layer 32 may further include a third colorant 33b having a yellow color. With such a decorative layer 30, the overlapping portion of the first layer 31 and the second layer 32 forms a dark design. The first layer 31 and the second layer 32 hardly contain a colorant having a black color such as carbon black, and a dark portion can be formed in the design formed by the decorative layer 30.

[0063] FIG. 10 shows an enlarged cross-sectional view of a modified example of the decorative layer 30. In the example shown in FIG. 10, the decorative layer 30 does not include the second layer 32 and the third layer 33. The decorative layer 30 includes only the first layer 31. In this modified example, the first layer 31 includes a first binder resin 31a, a first colorant 31b having a cyan color, a second colorant 32b having a magenta color, and a third colorant 33b having a yellow color. The first colorant 31b, the second colorant 32b, and the third colorant 33b are encapsulated in the first binder resin 31a. In other words, the first colorant 31b, the second colorant 32b, and the third colorant 33b are mixed in one layer. When observed from the first surface 20A, the first colorant 31b, the second colorant 32b, and the third colorant 33b overlap in a portion of the decorative layer 30. This portion of the decorative layer 30 forms a dark design. The decorative layer 30 contains almost no black-based colorant such as carbon black, and can form dark parts in the design formed by the decorative layer 30. Light can be appropriately transmitted through the decorative member 20. The decorated display device 1 having the decorative member 20 can appropriately display a display object.

[0064] Fig. 11 shows an enlarged cross-sectional view of another modified example of the decorative layer 30. In the example shown in Fig. 11, the decorative layer 30 further includes a solid layer 35 that is a single color and is uniformly provided over the entire decorative layer 30. The solid layer 35 forms a background color of the design formed by the decorative layer 30. The solid layer 35 allows the decorative layer 30 to form a more excellent design. The solid layer 35 is disposed closer to the second surface 20B of the decorative member 20 than to the first surface 20A with respect to the first layer 31, the second layer 32, and the third layer 33.

[0065] The solid layer 35 includes a fourth binder resin 35a and a fourth colorant 35b encapsulated in the fourth binder resin 35a. The solid layer 35 may have any color. The fourth colorant 35b may be a pigment of any color. The fourth colorant 35b may have a black color such as carbon black. The fourth colorant 35b is uniformly distributed throughout the fourth binder resin 35a.

[0066] The solid layer 35 is provided on the release layer 22 as shown in FIG. 7 before the first layer 31, the second layer 32, and the third layer 33, for example by printing.

[0067] Since the solid layer 35 is a uniform monochromatic color throughout the entire decorative layer 30, the solid layer 35 is unlikely to cause a portion of the decorative member 20 to have lower transmittance than other portions. In other words, uneven transmittance caused by the solid layer is unlikely to occur. Light can be properly transmitted through the decorative member 20. The decorated display device 1 having the decorative member 20 can properly display a display object.

[0068] The above-described embodiments and modifications may be combined as appropriate.

Images