JP7307899B2 - Decorative sheet, display device with decorative sheet, display device with panel - Google Patents

Description

The present invention relates to a decorative sheet, a decorative sheet-equipped display device having the decorative sheet, and a panel-equipped display device having the decorative sheet-equipped display device.

2. Description of the Related Art A display device that displays image light is known, for example, as described in Patent Document 1. Such a display device normally appears black when no image is displayed. On the other hand, for surface members such as automobiles, furniture, and building materials for houses, designability is very important. 2. Description of the Related Art Currently, display devices that are applied to various fields are expected not only to have a function of simply displaying an image, but also to be harmonious in design with the surrounding environment.

2. Description of the Related Art In order to impart design to a display device, it has been considered to provide a decorative sheet so as to face the display surface of the display device. The decorative sheet can impart a design that can harmonize with the surrounding environment of the display device. In addition, a transparent portion such as a hole is provided in a region facing the display surface of the decorative sheet so that the image light of the display device can pass through the decorative sheet.

JP-A-9-114003

By the way, when the decorative sheet is provided with the transparent portion, the design cannot be displayed in the portion provided with the transparent portion, so the design of the decorative sheet is faintly observed. If the transparent portion is provided only in the region facing the display surface of the decorative sheet, the design of the decorative sheet is faintly observed only in the region facing the display surface. That is, there is a difference in design between the area facing the display surface of the decorative sheet and the area other than the area facing the display surface of the decorative sheet. Due to this difference in design, the design of the decorative sheet is deteriorated, and furthermore, the harmony of design with the surrounding environment may be disturbed.

In order to eliminate the difference in design between the area facing the display surface of the decorative sheet and the area other than the area facing the display surface, not only the area facing the display surface of the decorative sheet but also the display surface It is conceivable to provide a transmission portion in an area other than the facing area. In other words, it has been considered to provide a transparent portion uniformly over the entire decorative sheet. However, it is not preferable to provide the entire decorative sheet with the transparent portion because the processing step for providing the transparent portion is costly.

The present invention has been made in consideration of such points, and provides a low-cost, low-cost solution for improving designability between a region facing a display surface of a decorative sheet and a region other than the region facing the display surface. The purpose is to make it difficult to recognize the difference.

A decorative sheet of the present invention is a decorative sheet including at least a first region covering a display surface of a display device and a second region adjacent to the first region,
A pattern portion and a transmissive portion that is a non-formation portion of the pattern portion provided at least in the first region,
a ratio of the transmission portion in the first region is higher than a ratio of the transmission portion in the second region;
L ^* a ^* b ^* in the first region, L ^* ₁ being the value of L ^* , a ^* ₁ being the value of a ^* , and b ^* ₁ being the value of b ^* in the color system, and the second region L ^* a ^* b ^* in the color system. L ^* ₂ , a ^* _a ^* , and b ^{* 2} in _the color ^system satisfy the following relationship.
((L ^* ₁ -L ^* ₂ ) ²⁺ (a ^* ₁ -a ^* ₂ ) ²⁺ (b ^* ₁ -b ^* ₂ ) ² )1/ ^2≤3

In the decorative sheet of the present invention, a ratio of the transmission portion in the first region may be 10% or more and 50% or less.

The decorative sheet of the present invention may further include a shielding portion that covers the design portion at least in the first region.

In the decorative sheet of the present invention, the thickness of the shielding portion in the first region may be thicker than the thickness of the shielding portion in the second region.

In the decorative sheet of the present invention, the density of the pigment contained in the pattern portion in the first region may be higher than the density of the pigment contained in the pattern portion in the second region.

In the decorative sheet of the present invention, the thickness of the picture portion in the first region may be thicker than the thickness of the picture portion in the second region.

In the decorative sheet of the present invention, the area ratio of the halftone dots of the pattern portion in the first region may be larger than the area ratio of the halftone dots of the pattern portion in the second region.

The display device with a decorative sheet of the present invention is
a display device having a display surface;
and any one of the decorative sheets described above provided facing the display surface.

In the display device with a decorative sheet of the present invention, the transmissive portions may be arranged in a direction non-parallel to the arrangement direction of the pixels of the display device.

According to the present invention, it is possible to make it difficult to perceive the difference in design between the area of the decorative sheet facing the display surface and the area other than the area facing the display surface at low cost.

FIG. 1 is an exploded perspective view schematically showing each element of a display device with a panel. FIG. 2 is a cross-sectional view of a display device with a panel. FIG. 3 is a front view of the panel-equipped display device. FIG. 4 is a cross-sectional view of the decorative sheet, showing an enlarged pattern portion of the first area and a pattern portion of the second area. FIG. 5 is a plan view showing halftone dots of the pattern portion of the first area. FIG. 6 is a plan view showing halftone dots of the picture portion of the second area. FIG. 7 is a front view showing an enlarged decorative sheet in the first region. FIG. 8 is a modified example of the panel-equipped display device of FIG. FIG. 9 is a front view of a conventional panel-equipped display device corresponding to FIG.

An embodiment of the present invention will be described below with reference to the drawings. In addition, in the drawings attached to this specification, for the convenience of illustration and ease of understanding, the scale and the ratio of vertical and horizontal dimensions are appropriately changed and exaggerated from those of the real thing.

In this specification, the terms "layer", "sheet" and "film" are not to be distinguished from each other based only on the difference in designation. For example, the term "sheet" is a concept that includes members that can be called layers or films.

In addition, terms such as "parallel", "perpendicular", "identical", length and angle values, etc. that specify shapes and geometric conditions and their degrees used in this specification are strictly It shall be interpreted to include the extent to which similar functions can be expected without being bound by the meaning.

FIG. 1 is an exploded perspective view schematically showing a display device 10 with a panel according to one embodiment of the invention. As shown in FIG. 1 , the panel-equipped display device 10 includes a decorative sheet-equipped display device 20 and a panel member 30 . The display device 20 with a decorative sheet has a display device 40 having a display surface 41 and a decorative sheet 50 provided facing the display surface 41 . Further, the panel-equipped display device 10 includes a display device 40 and a panel 15 provided facing a display surface 41 of the display device 40, and the panel 15 includes a panel member 30 and a decorative sheet 50. I'm in. In the illustrated example, the panel-equipped display device 10 is shown in a flat plate shape. It may be in shape.

The display device 40 is a device that emits image light, and has a display surface 41 that can emit image light. Any display device such as a liquid crystal display, a plasma display, an organic EL display, or the like can be used as the display device 40 . A display surface 41 of such a display device 40 is typically a glass surface. The pixels px of the display device 40 are arranged along the first direction d1 shown in FIG. 1 and the second direction d2 orthogonal to the first direction d1.

The panel member 30 is arranged between the display device 40 and the decorative sheet 50 . The panel member 30 also has an opening 37 . The display surface 41 is positioned within the opening 37 when viewed from the normal direction to the display surface 41 . Furthermore, as will be described later, the decorative sheet 50 includes a transmission portion 57 through which visible light can be transmitted. Therefore, the image light emitted from the display surface 41 of the display device 40 can pass through the panel member 30 through the opening 37 and can pass through the decorative sheet 50 . Image light is emitted from the panel-equipped display device 10 by transmitting the image light through the panel member 30 and the decorative sheet 50, and an external observer can observe an image formed by the image light.

The specific mode of the image light referred to here is not particularly limited, and the image light may include light in general, regardless of specific types and contents. Typically, image light can be composed of light that represents specific information, but an image can be composed of light that has any other form (for example, light that represents an irregular pattern, light that does not represent any specific information, etc.). Light may be configured. For example, the image light may be light that is transmitted through a printed transparent film or the like to display an image, or may be light that displays a bright and dark image using a light blocking object.

In the example shown in FIGS. 1 and 2, the panel member 30 is provided around the display device 40 when the display device 10 with panel is viewed from the front. Conversely, the display device 40 is installed in the area where the panel member 30 is provided, and the display device 40 forms the display device 10 with panel together with the panel member 30 and the decorative sheet 50 . The panel member 30 is, for example, a plate member having a thickness of 0.01 mm or more and 5 mm or less. The panel member 30 may be a planar member, a curved member, or a member including a planar portion and a curved portion.

As shown in FIG. 2 , the panel member 30 includes a base layer 31 and a design layer 35 provided on the base layer 31 . The base material layer 31 is a member capable of appropriately supporting the element of the panel member 30, which is the design layer 35 in this embodiment. The design layer 35 is a member for imparting a design to the panel member 30, and is typically a dark color such as black. Such a design layer 35 is formed of, for example, a resin containing a black pigment. Examples of black pigments include carbon black and titanium black. The design layer 35 may impart arbitrary design properties such as a wood grain tone or a marble tone depending on the environment in which the panel member 30 is provided.

Further, as shown in FIG. 1, the panel member 30 has a square shape with a rectangular opening 37 . However, the panel member 30 is not limited to this, and may have a shape obtained by removing a part of a rectangle, such as an L shape or a U shape. Even with such a shape, the image light emitted from the display surface 41 is positioned within the rectangular portion of the panel member 30 when observed from the normal direction to the display surface 41, so that the image light emitted from the display surface 41 is projected onto the panel member. 30 can be penetrated. Moreover, the panel member 30 is not limited to a rectangular shape, and may have any shape such as a circular shape. Furthermore, the shape of the opening 37 may also be arbitrary.

Next, the decorative sheet 50 will be explained. The decorative sheet 50 imparts design to the display device 40 . As shown in FIGS. 2 and 3, the decorative sheet 50 includes at least a first region 50a covering the display surface 41 of the display device 40 and a second region 50b covering the panel member 30. . The first region 50a and the second region 50b are adjacent to each other. In the illustrated example, the second region 50b circumferentially surrounds the first region 50a. Also, in the illustrated example, the first area 50a is an area facing the display surface 41a of the display device 40 . However, without being limited to this example, the first area 50a may be wider than the area facing the display surface 41a.

The decorative sheet 50 has a substrate portion 51, a pattern portion 53 and a shielding portion 55 provided on the substrate portion 51, and a transmission portion 57 which is a portion where the pattern portion 53 and the shielding portion 55 are not formed. are doing. The decorative sheet 50 has L ^* a ^* b ^* in the first region 50a, L* ₁ which is the value of L ^* , a ^* ₁ which is the value of a ^* , and b ^* which is the value of b ^* in the color system. ^* ₁ , and _L *2, ^which is the value of L ^* in the L ^* a ^* b ^* color system in the second region 50b, a ^* ₂ , which is the value of a ^* , and b ^* ₂ , which is the value of b ^* , It satisfies the following relations.
((L ^* ₁ -L ^* ₂ ) ²⁺ (a ^* ₁ -a ^* ₂ ) ²⁺ (b ^* ₁ -b ^* ₂ ) ² )1/ ^2≤3

The L ^* value, a ^* value and b ^* value in the L ^* a ^* b ^* color system are measured using a colorimeter or a spectrophotometer. The value of L ^* , the value of a ^* , and the value of b ^* of the decorative sheet 50 were measured at arbitrary 50 locations on the decorative sheet 50 using a spectrophotometer (“CM-700d” manufactured by Konica Minolta). It is defined as the average value of the L ^* , a ^* and b ^* values measured from the reflected light of the decorative sheet 50 under the condition that the measurement diameter is Φ8 mm.

The base portion 51 appropriately supports the pattern portion 53 and the shield portion 55 provided on the base portion 51 . The base material portion 51 is a transparent film-like member. As the base material portion 51, any material may be used as long as it transmits visible light and can appropriately support the pattern portion 53 and the shielding portion 55. Examples thereof include polymethyl methacrylate, polyethylene terephthalate, polyethylene naphthalate, Polycarbonate, polystyrene, cyclic polyolefin and the like can be mentioned. In addition, considering the visible light transmittance and appropriate supportability of the pattern portion 53 and the shielding portion 55, the base portion 51 preferably has a thickness of 10 μm or more and 500 μm or less.

The pattern portion 53 displays the pattern displayed by the decorative sheet 50 . The pattern section 53 can display patterns such as figures, patterns, designs, colors, pictures, photographs, characters, marks, letters and numbers as designs. In particular, examples of designs that can be harmonized with the surrounding environment where the panel-equipped display device 10 is provided include wood grain patterns, marble patterns, and geometric patterns. Moreover, the pattern part 53 may display a pattern of a single color as a design. In order to display such a pattern, the pattern portion 53 contains a pigment. The pigment may be a pigment of any color, for example the black pigment carbon black. In FIG. 2, the pattern portion 53 has a rectangular cross-sectional shape, but the cross-sectional shape is not limited to this, and may be a trapezoidal shape or the like.

FIG. 4 shows enlarged pattern portions 53 in the first area 50a and the second area 50b. As shown in FIG. 4, the thickness Ha of the pattern portion 53a in the first region 50a is thicker than the thickness Hb of the pattern portion 53b in the second region 50b. Therefore, the pattern portion 53a in the first region 50a can display the design darker than the pattern portion 53b in the second region 50b. Here, the thickness of the pattern portion 53 is the length of the pattern portion 53 along the normal direction of the base material portion 51 that supports the pattern portion 53 . As a specific example, the thickness Ha of the pattern portion 53a in the first region 50a is 1 μm or more and 20 μm or less, and the thickness Hb of the pattern portion 53b in the second region 50b is 0.5 μm or more and 20 μm or less.

Also, the density of the pigment contained in the pattern portion 53a in the first region 50a is higher than the density of the pigment contained in the pattern portion 53b in the second region 50b. The higher the concentration of the pigment, the darker the color can be presented. Therefore, the pattern portion 53a in the first region 50a can display the design darker than the pattern portion 53b in the second region 50b. Here, the density of the pigment contained in the design portion 53 is a value represented by the percentage of the amount of the pigment in the total solid content of the design portion 53 including the pigment and the binder resin. As a specific example, the amount of pigment in the total solid content of pattern portion 53a in first region 50a is 3% by mass or more and 40% by mass or less, and the amount of pigment in the total solid content of pattern portion 53b in second region 50b is The amount is 1% by mass or more and 38% by mass or less.

Furthermore, as shown in FIGS. 5 and 6, when the design displayed by the pattern portion 53 is represented by halftone dots 60, the area ratio of the halftone dots 60a of the pattern portion 53a in the first region 50a is the second It is larger than the area ratio of the halftone dot 60b of the pattern portion 53b in the area 50b. Here, the area ratio of halftone dots means the ratio of the area in which halftone dots are formed per unit area, and the unit can be % as an example. 5 and 6, each halftone dot 60 is represented by a circle. The larger the area ratio of the halftone dots 60, the darker the design represented by the halftone dots can be displayed. Therefore, the pattern portion 53a in the first region 50a can display the design darker than the pattern portion 53b in the second region 50b. As a specific example, the area ratio of the halftone dots 60a of the pattern portion 53a in the first region 50a is 50% or more and 99.5% or less, and the area ratio of the halftone dots 60b of the pattern portion 53b in the second region 50b is 55%. % or more and 99.9% or less. Also, the size of each halftone dot 60 is, for example, 1 μm ² or more and 40000 μm ² or less.

The shielding portion 55 is arranged between the design portion 53 and the base material portion 51 and covers the design portion 53 from the base material portion 51 side. 2 and 4, the shielding portion 55a is arranged between the design portion 53a and the base material portion 51 in the first region 50a, and the shielding portion 55a is arranged between the design portion 53b and the base material portion 51 in the second region 50b. , and a shielding portion 55b are shown. However, the shielding part 55 may be provided only in the first region 50a and not provided in the second region 50b. In other words, the shielding portion 55 is provided at least in the first region 50a. Preferably, the shielding portion 55 is provided only at a position facing the design portion 53 . The shielding portion 55 has a function of absorbing light so that the image light from the display device 40 does not enter the pattern portion 53 . The shielding part 55 may contain, for example, light absorbing particles in a binder resin. Examples of light-absorbing particles include black pigments such as carbon black and titanium black. Also, in the example shown in FIG. 4, the thickness Ta of the shielding portion 55a in the first region 50a is thicker than the thickness Tb of the shielding portion 55b in the second region 50b. When the thick shielding part 55 covers the design part 53, the design of the design part 53 can be displayed darkly. Therefore, the pattern portion 53a in the first region 50a can display the design darker than the pattern portion 53b in the second region 50b. As a specific example, the thickness Ta of the shielding portion 55a in the first region 50a is 1 μm or more and 20 μm or less, and the thickness Tb of the shielding portion 55b in the second region 50b is 0.5 μm or more and 20 μm or less.

The transmissive portion 57 is a portion in which the pattern portion 53 is not formed when the decorative sheet 50 is observed from the front, and can transmit the image light from the display device 40 . In addition, although the transmission part 57 may be a hole or a gap as in the illustrated example, it may be formed of, for example, a transparent resin. Furthermore, the transparent portion 57 made of transparent resin may cover the pattern portion 53 and the shielding portion 55 . Such a transmission portion 57 can function as a transparent protective film that protects the pattern portion 53 and the shielding portion 55 .

The term “transparency” refers to the transmittance at each wavelength when measured using a spectrophotometer (“UV-3100PC” manufactured by Shimadzu Corporation, compliant with JIS K 0115) within a measurement wavelength range of 380 nm to 780 nm. means that the visible light transmittance specified as the average value of is 80% or more.

In the example shown in FIG. 2, the transmissive portion 57 is provided only in the first region 50a. However, the transmissive portion 57 may be provided in the second region 50b. The proportion of the transmissive portion 57 in the first region 50a is higher than the proportion of the transmissive portion 57 in the second region 50b. Here, the ratio of the transmissive portion means the ratio of the area in which the transmissive portion is formed per unit area. Specifically, the ratio of the transparent portion 57 in the first region 50a is 50% or less so that the observer can clearly observe the design of the decorative sheet 50 in the image non-display state of the display device 40. preferable. Further, the ratio of the transmission portion 57 in the first region 50a is preferably 10% or more in order to transmit the image light in the image display state of the display device 40 .

The transmissive portions 57 are preferably arranged in a direction non-parallel to the arrangement direction of the pixels px of the display device 40 described above. In the present embodiment, as shown in FIG. 7, the transmissive portion 57 is arranged in a third direction d3 inclined at 30° with respect to the first direction d1, which is the arrangement direction of the pixels, and at an angle of 30° with respect to the second direction d2. They are arranged along each of the inclined fourth directions d4. Further, the transmitting portion 57 is circular with a diameter D of 50 μm or more and 200 μm or less, for example. Also, the interval P between the arranged transmitting portions 57 is 75 μm or more and 500 μm or less.

Next, the operation of the display device 10 with panel according to the present embodiment will be described.

When an image is displayed on the display surface 41 of the display device 40, the image light passes through the opening 37 of the panel member 30 and the transparent portion 57 of the decorative sheet 50 and is observed by an external observer. When the ratio of the transmissive portion 57 in the first region 50a covering the display surface 41 of the display device 40 is 10% or more, the observer can observe image light with sufficient brightness.

The pattern portion 53a in the first area 50a is covered from the display device 40 side by the shielding portion 55a. Therefore, the shielding portion 55a prevents the image light from entering the pattern portion 53a. Therefore, it is possible to prevent the image light from transmitting through the pattern portion 53a and the design represented by the pattern portion 53a and the image light from being mixed and observed. That is, it is possible to effectively prevent deterioration in color reproducibility of an image due to absorption of visible light in a specific wavelength range by the pattern portion 53a. Further, when the shielding portion 55a is provided only in the region facing the pattern portion 53a, the image light passing through the transmitting portion 57 is prevented from being blocked by the shielding portion 55a. That is, the image light can be efficiently used to display the image brightly.

Furthermore, as shown in FIG. 7 , the transmissive portions 57 are arranged in a direction non-parallel to the arrangement direction of the pixels px of the display device 40 . Therefore, the periodic structure of the arrangement of the pixels px of the display device 40 and the periodic structure of the arrangement of the transmissive portions 57 are less likely to interfere with each other, and it is possible to effectively prevent interference fringes from being observed together with the image. From the viewpoint of making the interference fringes inconspicuous, it is preferable to incline the arrangement directions d3 and d4 of the transmissive portions 57 with respect to the arrangement directions d1 and d2 of the pixels px at an angle of 15° or more and 75° or less.

On the other hand, when no image is displayed on the display surface 41 of the display device 40, the design of the decorative sheet 50 is observed by the observer. In particular, when the decorative sheet 50 has a visible light transmittance of 50% or less, the observer can clearly observe the design of the decorative sheet 50 . In particular, when the shielding portion 55 is provided only at a position facing the pattern portion 53, the shielding portion 55 is not observed by the observer, and the design of the decorative sheet 50 is prevented from being impaired by the shielding portion 55. be.

By the way, as described above, in the panel-equipped display device 110 having the conventional decorative sheet 150 shown in FIG. Then, the design of the decorative sheet 150 becomes thin in the first region 150a. Therefore, there is a difference in design between the first region 150a and the second region 150b.

On the other hand, in the panel-equipped display device 10 having the decorative sheet 50 of the present embodiment, L ^* a ^* b ^* in the first region 50a and L ^* ₁ , which is the value of L ^* in the color system, are the values of a ^* b ^* ₁ , which is the value of certain a ^* ₁ and b ^* , and L*2, which is the value of L ^* in the _L ^* a ^* b ^* color system in the second region 50b, and a ^* ₂ , which is the value of ^{a *} , b ^* , b ^* ₂ satisfies the following relationship.
((L ^* ₁ -L ^* ₂ ) ²⁺ (a ^* ₁ -a ^* ₂ ) ²⁺ (b ^* ₁ -b ^* ₂ ) ² )1/ ^2≤3
By satisfying this relationship, the difference in color between the first region 50a and the second region 50b becomes almost unnoticeable to the observer. That is, it is possible to make it difficult to recognize the difference in design between the area facing the display surface 41 of the decorative sheet 50 and the area other than the area facing the display surface 41 .

Also in the display device 10 with a panel having the decorative sheet 50 of the present embodiment, the transmission portion 57 is provided only in the first region 50a. If the first area 50a is configured in the same manner except that the second area 50b is displayed, the design is displayed lighter overall than the second area 50b, and the above relationship is not satisfied. Therefore, in order to satisfy the above-described relationship, a design has been devised so that the pattern portion 53a in the first area 50a can display the design darker than the pattern portion 53b in the second area 50b.

For example, the thickness Ta of the shielding portion 55a in the first region 50a is thicker than the thickness Tb of the shielding portion 55b in the second region 50b. The density of the pigment contained in the picture portion 53b in the first region 50b is higher than that of the pigment contained in the picture portion 53b, the thickness Ha of the picture portion 53a in the first region 50a is thicker than the thickness Hb of the picture portion 53b in the second region 50b, and the first region 50a that the area ratio of the halftone dots 60a of the pattern portion 53a in the second region 50b is larger than the area ratio of the halftone dots 60b of the pattern portion 53b in the second region 50b. The part 53a can display the design darker than the pattern part 53b in the second area 50b. In this way the above relationship can be satisfied. These can be implemented at low cost compared to forming the transmissive portion 57 in the second region 50b as well as in the first region 50a. However, the conditions for satisfying the above relationship are not limited to these.

For example, the transmissive portion 57 is formed as follows. First, the pattern portion 53 and the shielding portion 55 are provided on the entire surface of the base material portion 51 . Next, a laser is applied to a position on the base material portion 51 where the transmission portion 57 is to be formed. The pattern portion 53 and the shielding portion 55 at the position irradiated with the laser are removed. The position of the pattern portion 53 and the shielding portion 55 that have been removed becomes the transparent portion 57 . In such a method of forming the transmissive portion 57, the cost is proportional to the area irradiated with the laser. Therefore, forming the transmissive portion 57 only in the first region 50a is less costly than forming the transmissive portion 57 in the first region 50a and the second region 50b.

Alternatively, the transmissive portion 57 may be formed as follows. First, the pattern portion 53 and the shielding portion 55 are provided on the entire surface of the base portion 51 . Next, a photoresist is applied to the side where the pattern portion 53 and the shielding portion 55 are provided. After that, a photomask having holes provided at positions where the transmissive portions 57 are to be formed is provided on the photoresist. Ultraviolet rays are applied through a photomask. When exposed to UV light, the photoresist becomes soluble in the developer. That is, the photoresist is dissolved in the development process at the position where the transparent portion 57 is to be formed. Next, it is immersed in an etchant to remove the pattern portion 53 and the shielding portion 55 at the positions where the photoresist has been removed. The position of the pattern portion 53 and the shielding portion 55 that have been removed becomes the transparent portion 57 . Such a method for forming the transmitting portion 57 is costly in proportion to the size of the photomask used and the size of the ultraviolet irradiation device. Therefore, forming the transmissive portion 57 only in the first region 50a is less costly than forming the transmissive portion 57 in the first region 50a and the second region 50b.

The method of forming the transmissive portion 57 described above is an example, and the transmissive portion 57 may be formed by other methods.

As described above, the decorative sheet 50 of the present embodiment includes the first region 50a covering at least the display surface 41 of the display device 40 and the second region 50b adjacent to the first region 50a. and a pattern portion 53 and a transmissive portion 57 which is a non-formed portion of the pattern portion 53 provided at least in the first region 50a, and the proportion of the transmissive portion 57 in the first region 50a is the second region L ^* a ^* b ^* in the first region 50a ^{, and} a ^* _{1 and} b ^* , which are the values of L ^* in the L* color system, _are higher than the ratio of the transmissive portion 57 in the first region 50b. A certain b ^* ₁ , L ^* a ^* b ^* in the second region 50b, L ^* 2 _which is the value of L ^* in the color system, a ^* ₂ which is the value of a ^* , and b ^* ₂ which is the value of b ^* satisfies the following relations:
((L ^* ₁ -L ^* ₂ ) ²⁺ (a ^* ₁ -a ^* ₂ ) ²⁺ (b ^* ₁ -b ^* ₂ ) ² )1/ ^2≤3
According to such a decorative sheet 50, by satisfying the above relationship, the color difference between the first region 50a facing the display surface 41 and the second region 50b adjacent to the first region 50a is almost invisible to the observer. Also, the above relationships can be satisfied at low cost. That is, at low cost, it is possible to make it difficult to recognize the difference in design between the area facing the display surface 41 of the decorative sheet 50 and the area other than the area facing the display surface 41 .

Various modifications can be made to the above-described embodiment.

For example, in the embodiment described above, the decorative sheet 50 has the base material portion 51 . However, the base material portion 51 may be removed from the decorative sheet 50 by, for example, peeling it off during the manufacturing process. In this case, the transmission part 57 can be formed as a through hole of the decorative sheet 50 .

In the above-described embodiment, as shown in FIG. 2, the pattern portion 53 of the decorative sheet 50 is arranged on the side from which the panel-equipped display device 10 is viewed. However, as shown in FIG. 8, the base portion 51 of the decorative sheet 50 may be arranged on the side from which the panel-equipped display device 10 is observed. When the base material portion 51 of the decorative sheet 50 is arranged on the side from which the panel-equipped display device 10 is observed, it is less likely that foreign matter will adhere to the transmissive portion 57 and interfere with the image light.

The above-described panel-equipped display device 10 is used, for example, as an interior member or an exterior member of vehicles such as automobiles and railroads, aircraft, ships, spacecraft, and other moving bodies. As a specific example, the panel-equipped display device 10 is used for a center console or door trim of an automobile. Alternatively, the panel-equipped display device 10 may be used by being incorporated in an interior member or exterior member of a building, electronic equipment, furniture, or electrical appliances.

10 Display device with panel 20 Display device with decorative sheet 30 Panel member 31 Base material layer 35 Design layer 37 Opening 40 Display device 41 Display surface 50 Decorative sheet 50a First area 50b Second area 51 Base material part 53 Pattern part 55 Shielding portion 57 Transmission portion 60 Halftone dot

Claims (8)

A decorative sheet including at least a first region covering a display surface of a display device and a second region adjacent to the first region,
A pattern portion and a transmissive portion that is a non-formation portion of the pattern portion provided at least in the first region,
a ratio of the transmission portion in the first region is higher than a ratio of the transmission portion in the second region;
the concentration of the pigment contained in the pattern portion in the first region is higher than the concentration of the pigment contained in the pattern portion in the second region;
L ^* a ^* b ^* in the first region, L ^* ₁ being the value of L ^* , a ^* ₁ being the value of a ^* , and b ^* ₁ being the value of b ^* in the color system, and the second region L ^* a ^* b ^* in the color system ^, where L ^* ₂ , a ^* _a ^* , and _b ^* in ^the color system satisfy the following relationship: sheet.
((L ^* ₁ -L ^* ₂ ) ²⁺ (a ^* ₁ -a ^* ₂ ) ²⁺ (b ^* ₁ -b ^* ₂ ) ² )1/ ^2≤3 2. The decorative sheet according to claim 1, wherein a ratio of said transmission portion in said first region is 10% or more and 50% or less. 3. The decorative sheet according to claim 1, further comprising a shielding portion covering said pattern portion at least in said first region. The decorative sheet according to claim 3, wherein the thickness of the shielding portion in the first region is thicker than the thickness of the shielding portion in the second region. The decorative sheet according to any one of claims 1 to 4, wherein the thickness of the pattern portion in the first region is thicker than the thickness of the pattern portion in the second region. The decorative sheet according to any one of claims 1 to 5, wherein the area ratio of the halftone dots of the pattern portion in the first region is larger than the area ratio of the halftone dots of the pattern portion in the second region. a display device having a display surface;
A display device with a decorative sheet, comprising: the decorative sheet according to any one of claims 1 to 6 provided facing the display surface. 8. The display device with a decorative sheet according to claim 7, wherein said transmissive portions are arranged in a direction non-parallel to an arrangement direction of pixels of said display device.

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