JP2011186270A - Display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display device white display with a simple configuration by utilizing a color development mechanism by a structure color at a low cost. <P>SOLUTION: The display device is equipped with: a pressurizing member for elastically deforming a base material by pressurizing a color tone change sheet material utilizing the color development mechanism by the structure color to a transparent plate side deforming the color tone change sheet material in the thickness direction; a first deformation allowing member provided between the color tone change sheet material and the pressurizing member; and a translucent second deformation allowing member provided between a transparent plate and the color tone change sheet material. The first deformation allowing member and the second deformation allowing member allow the free deformation of the color tone change sheet material when the color tone change sheet material is pressurized by the pressurizing member. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a display device, and more particularly to a display device using a coloring mechanism using structural colors.

Conventionally, there are display devices using structural colors.
The structural color is obtained by interference-reflecting light of a specific wavelength based on Bragg's law in a material having a specific periodic structure.

Patent Document 1 discloses a display device in which a plurality of unit configurations made of a plate-like optical composition for multicolor display using a colloidal crystal structure as a periodic structure are arranged in a plane on an array.
Patent Document 2 discloses an elastic material composed of a colloidal crystal composed of polystyrene particles as monodispersed fine particles and an elastic body located between the particles, and the colloidal crystal is deformed by elastically deforming the elastic material. The development of a specific structural color and the production of an elastic material into a sheet form to obtain an elastic sheet.

JP 2007-11112 A JP 2006-28202 A

In the technique of Patent Document 1, the unit configuration is a pixel of the display device, but it is necessary to provide a gap or a groove between the unit configurations, and the pixels cannot be made dense by the gap or the groove. There's a problem.
Incidentally, if no gaps or grooves are provided between the unit configurations (pixels), the unit configuration is hindered by the adjacent unit configurations, so that individual unit configurations cannot be freely deformed. Color development is not obtained.

In the technique of Patent Document 2, if the area of the elastic sheet is relatively large, it becomes difficult to sufficiently deform substantially the entire surface of the elastic sheet, and the structural color cannot be controlled satisfactorily.
Further, since a large pressing force is required to sufficiently deform substantially the entire surface of the elastic sheet, a high mechanical rigidity is required for the pressing device, so that the manufacturing cost increases, and There is a problem that driving energy also increases.

The present invention has been made to solve the above problems, and has the following objects.
(1) To provide a display device including a color tone changing sheet material using a coloring mechanism based on structural colors, which can densely arrange pixels, at a low cost.
(2) A display device provided with a color tone changing sheet material using a coloring mechanism based on a structural color, which requires only a small pressing force to obtain a good structural color by deforming substantially the entire surface of the color tone changing sheet. Provide low cost.

  As a result of intensive studies in order to solve the above-mentioned problems, the present inventors have arrived at each aspect of the present invention as follows.

<First aspect of the present invention>
The first aspect includes particles arranged at regular intervals, and a base material that is elastically deformable interposed between the particles, and elastically deforms the base material to change the interval of the particles. By reflecting visible light having a specific wavelength according to the interval between particles, a color change sheet material that changes color tone, and
A transparent plate provided on the display side;
A pressing member that elastically deforms the substrate by pressing the color tone changing sheet material toward the transparent plate and deforming the color tone changing sheet material in a thickness direction;
A first deformation allowing member provided between the color change sheet material and the pressing member;
A display device comprising a second deformation-permitting member having translucency provided between the transparent plate and the color change sheet material;
The first deformation allowing member and the second deformation allowing member are display devices that allow the color changing sheet material to be freely deformed when the color changing sheet material is pressed by the pressing member.

  In the first aspect, the color change sheet material is allowed to be freely deformed on substantially the entire surface of the color change sheet material by the first deformation permission member and the second deformation permission member, and the color change sheet material is relatively large. Since it is easy to sufficiently deform substantially the entire surface, the structural color can be controlled satisfactorily.

And in 1st aspect, since it is possible to make small the pressing force required in order to fully deform the substantially whole surface of a color tone change sheet material, in addition to being able to reduce the manufacturing cost of a pressing member, Driving energy can be reduced.
Therefore, according to the first aspect, it is small to obtain a good structural color by deforming substantially the entire surface of the color tone changing sheet material with a simple configuration in which only the first deformation permission member and the second deformation permission member are provided. A display device that only requires pressing force can be provided at low cost.

<Second aspect of the present invention>
The second aspect includes particles arranged at regular intervals, and a base material that is elastically deformable interposed between the particles, and elastically deforms the base material to change the interval between the particles. By reflecting visible light having a specific wavelength according to the interval between particles, a color change sheet material that changes color tone, and
A transparent plate provided on the display side;
A pressing member that elastically deforms the substrate by pressing the color tone changing sheet material toward the transparent plate and deforming the color tone changing sheet material in a thickness direction;
A display device comprising a first deformation allowing member provided between the color tone changing sheet material and the pressing member,
The first deformation allowing member is a display device that allows the color changing sheet material to be freely deformed when the color changing sheet material is pressed by the pressing member.

  According to the second aspect, since the second deformation permission member in the first aspect is not provided, the function of the second deformation permission member cannot be obtained. The same actions and effects as the situation can be obtained.

<Third Aspect of the Present Invention>
The third aspect includes particles arranged at regular intervals, and a base material that is elastically deformable interposed between the particles, and elastically deforms the base material to change the interval of the particles. By reflecting visible light having a specific wavelength according to the interval between particles, a color change sheet material that changes color tone, and
A transparent plate provided on the display side;
A pressing member that elastically deforms the substrate by pressing the color tone changing sheet material toward the transparent plate and deforming the color tone changing sheet material in a thickness direction;
A display device comprising a second deformation-permitting member having translucency provided between the transparent plate and the color change sheet material;
The second deformation allowing member is a display device that allows the color changing sheet material to be freely deformed when the color changing sheet material is pressed by the pressing member.

  According to the third aspect, since the first deformation-permitting member in the first aspect is not provided, and the function of the first deformation-permitting member cannot be obtained, the first aspect is inferior to the first aspect. The same actions and effects as the situation can be obtained.

<Fourth aspect of the present invention>
A fourth aspect is the first or second aspect,
The first deformation allowing member is a black display device.

In the fourth aspect, when the color change sheet material is pressed and becomes transparent, the black first deformation-allowing member is visually recognized from the outside through the color change sheet material, so that black display can be performed.
Therefore, according to the fourth aspect, a black member is not specially provided. A display device capable of black display with a simple configuration can be provided at low cost.

<Fifth aspect of the present invention>
The fifth aspect is the first to fourth aspects,
The pressing member is provided for each pixel,
In the display device, the pixel is configured by a portion of the color tone changing sheet material pressed by each pressing member.

In the fifth aspect, free deformation of individual pixels of the color change sheet material is allowed by the deformation-permitting member, and when only arbitrary pixels are pressed and deformed by the pressing member, the deformation of the pixels is adjacent to the pixels. Therefore, it is possible to freely deform only the pixel without being hindered by the above, so that good color development of the pixel can be obtained.
Therefore, according to the fifth aspect, a display device capable of dense pixels can be provided at low cost with a simple configuration in which only a deformation allowing member is provided.

<Sixth aspect of the present invention>
The sixth aspect is the fifth aspect,
The deformation-permitting member is a display device that is divided for each pixel, and a gap is provided between each of the divided deformation-permitting members.

  According to the sixth aspect, since the deformation of the individual pixels of the color change sheet material is allowed even in the gap due to the gap of the deformation allowing member provided for each pixel, in the first to fourth aspects Coupled with the functions and effects, the color of the pixel can be further improved.

<Seventh aspect of the present invention>
The seventh aspect is the first to sixth aspects,
The deformation allowing member is an elastic display device.
According to the 7th aspect, the said effect | action and effect of a 1st-6th aspect are obtained reliably.

The perspective view of the display apparatus 10,100,110,120,130,140 of each embodiment which actualized this invention. It is XX sectional drawing in FIG. 1 (A), and is schematic sectional drawing for demonstrating the principal part longitudinal cross-section of the display apparatus 10 of 1st Embodiment. It is XX sectional drawing in FIG. 1 (A), and is schematic sectional drawing for demonstrating the principal part longitudinal cross-section of the display apparatus 100 of 2nd Embodiment. It is XX sectional drawing in FIG. 1 (A), and is schematic sectional drawing for demonstrating the principal part longitudinal cross-section of the display apparatus 110 of 3rd Embodiment. It is XX sectional drawing in FIG. 1 (A), and is schematic sectional drawing for demonstrating the principal part longitudinal cross-section of the display apparatus 120 of 4th Embodiment. It is XX sectional drawing in FIG. 1 (A), and is a schematic sectional drawing for demonstrating the principal part longitudinal cross-section of the display apparatus 130 of 5th Embodiment. It is XX sectional drawing in FIG. 1 (A), and is a schematic sectional drawing for demonstrating the principal part longitudinal cross-section of the display apparatus 140 of 6th Embodiment.

  Hereinafter, embodiments embodying the present invention will be described with reference to the drawings. In each embodiment, the same constituent members and constituent elements are denoted by the same reference numerals, and redundant description of the same content is omitted.

<First Embodiment>
FIG. 1 is a perspective view of the display device 10, 100, 110, 120, 130, 140 of each embodiment.
The display device 10 according to the first embodiment includes a storage case (housing) 11, and the storage case 11 has a substantially flat plate shape with an upper surface opened in a frame shape.
The surface 12 a of the transparent plate 12 is exposed from the opening on the upper surface side of the storage case 11, and the exposed surface 12 a becomes the display unit R of the display device 10. That is, the transparent plate 12 is provided on the display side of the display devices 10, 100, 110, 120, 130, and 140.

FIG. 2 is a cross-sectional view taken along the line XX in FIG. 1A, and is a schematic cross-sectional view for explaining a main-part vertical cross-sectional structure of the display device 10 of the first embodiment.
The display device 10 includes a storage case 11, a transparent plate 12, elastic sheet materials (elastic film materials) 20, 21, a pressing member 30, a black sheet material 40, a color tone changing sheet material (color tone changing film material) 50, and the like. Yes.

  The transparent plate 12 has a flat surface (upper surface) 12a and back surface (lower surface) 12b, is colorless and transparent, has translucency, and has a sufficient strength so that it does not deform even if a portion is pressed. For example, it is formed from various synthetic resin plates such as a glass plate and an acrylic plate.

A plurality of pressing members 30 are disposed and fixed at equal intervals on the inner bottom surface of the storage case 11.
The pressing member 30 includes a pressing surface 30a having a flat surface, and moves the pressing surface 30a by an arbitrary movement amount (displacement amount) in a direction perpendicular to the surface, and holds the moved position (displacement). Can do.
The mechanism for moving the pressing surface 30a of the pressing member 30 may be embodied by any configuration, for example, a spring mechanism, an air pressure mechanism, an electric motor, or the like may be used.

On the pressing surface 30 a of each pressing member 30, the black sheet material 40 is stretched and fixed by sticking.
The black sheet material 40 is an elastically deformable black sheet material, and is formed of, for example, a thin film made of chloroprene rubber.
Note that the black sheet material 40 may be omitted by coloring the pressing surface 30a of the pressing member 30 black.

The color tone changing sheet material 50 has a flat (uniform surface) surface (upper surface) 50a and rear surface (lower surface) 50b, and is exposed on the surface 12a (display portion R of the display device 10) of the transparent plate 12 exposed from the storage case 11. It is stretched so as to cover substantially the entire corresponding back surface 12b.
On the surface 50a side of the color tone changing sheet material 50, an elastic sheet material 20 (second deformation allowing member) is stretched so as to be in contact with and cover substantially the entire surface 50a.
On the back surface 50b side of the color change sheet material 50, an elastic sheet material 21 (first deformation allowing member) is stretched so as to contact and cover substantially the entire back surface 50b.
Each elastic sheet material 20, 21 has a flat and uniform thickness, and is formed of a colorless and transparent material that is elastically deformable and has translucency.

In the elastic sheet material 20, the surface (front surface) opposite to the surface (back surface) that contacts the surface 50 a of the color change sheet material 50 is in contact with the substantially entire surface of the back surface 12 b of the transparent plate 12.
In the elastic sheet material 21, the surface (back surface) opposite to the surface (front surface) that contacts the back surface 50 b of the color change sheet material 50 is in contact with the substantially entire surface of the black sheet material 40.
That is, the sheet materials 40, 21, 50, 20 are laminated in this order from the lower side, and the laminated sheet materials 40, 21, 50, 20 are formed on the pressing surface 30 a of the pressing member 30 and the transparent plate 12. It is sandwiched between the back surface 12b.
In addition, each sheet | seat material 40, 21, 50, 20 is not contact | adhered and fixed, but is only contacting.

The pressing surface 30a of each pressing member 30 is disposed so as to partition the transparent plate 12 (see FIG. 1).
In the color change sheet material 50, the pixels P of the display device 10 are configured by the portions pressed by the individual pressing surfaces 30a. That is, the pressing member 30 is provided for each pixel P of the display device 10.

[Configuration of Color Change Sheet Material 50]
The color tone changing sheet material 50 uses a coloring mechanism based on structural colors.
That is, the color tone changing sheet material 50 includes particles arranged at regular intervals, and an elastically deformable (reversibly deformable) and colorless and transparent base material (filler) interposed between the particles. And changing the interval between the particles by elastically deforming the base material and reflecting visible light having a specific wavelength according to the interval between the particles (the amount of deformation in the thickness direction of the color tone changing sheet material 50). Can be changed.

The pressing member 30 elastically deforms the substrate by pressing the color tone changing sheet material 50 toward the transparent plate 12 and deforming the color tone changing sheet material 50 in the thickness direction.
Examples of the base material include organic polymer materials such as styrene-based soft resins, soft polyvinyl chloride, polymethyl methacrylate (PMMA), hydroethyl methacrylate (HEMA), and acrylic elastomers obtained by polymerizing acrylic monomers. There is.

If the base material of the color tone changing sheet material 50 is formed of such a material, even if the color tone changing sheet material 50 is pressed and deformed by the pressing member 30, it is not pressed (non-pressed state). It is possible to return to the shape before the pressed state (pressed state).
Furthermore, even when the pressed state and the non-pressed state are repeated, the shape of the color change sheet material 50 in the non-pressed state (steady state) is unlikely to change.

A regular arrangement of particles in the substrate is a photonic crystal structure. In the photonic crystal structure, particles are arranged and distributed with a period similar to the wavelength of light around the visible range.
According to the photonic crystal structure, light with a wavelength similar to the period of the particle arrangement is Bragg-reflected, resulting in amplification of light of a specific wavelength, and the light of the specific wavelength (so-called structural color). Can be emitted.
Since the structural color tone due to such Bragg reflection depends on the period of the particle arrangement forming the photonic crystal structure, a structural color having a desired color tone can be obtained by appropriately setting the period of the particle arrangement. Furthermore, the tone of the structural color can be changed by changing the period of the particle arrangement.

Since the structural color can be developed using outside light, if natural light is used as outside light, a light source for light emitting display and a backlight device become unnecessary, and the power consumption of the display device 10 is reduced. The configuration of the display device 10 can be simplified. Furthermore, if natural light is used, the color can be brightly colored even outdoors, so that visibility can be improved.
In order to use the display device 10 at night or in a dark place, a light source for light emission display or a backlight device may be used.

  Examples of photonic crystal structures include colloidal crystal structures with monodisperse fine particles (colloid particles), microdomain structures of block copolymers, lamellar structures of surfactants, and thin film stacks (thin film stacks). .

The colloidal crystal structure is a structure in which colloidal particles are periodically arranged at predetermined intervals.
The colloidal particle material may be any material as long as it has a particle diameter of about 1 nm to about 1000 nm, can transmit visible light, and has a substantially spherical shape, such as silicon dioxide, boron. Silicate glass, calcium aluminate, lithium niobate, calcite, titanium dioxide, strontium titanate, aluminum oxide, lithium fluoride, magnesium fluoride, yttrium oxide, calcium fluoride, barium fluoride, zinc selenide, bromoiodide Thallium, diamond, polyethylene, polyethylene terephthalic acid, vinyl chloride, acrylic, vinyl oxide, polystyrene, polypropylene, polymethyl methacrylate, etc., silicon, germanium, various ferroelectrics (lead zirconate titanate (PZT), zirconate titanate) Use lanthanum lead (PLZT) etc. That's fine.
Colloidal particle materials include polystyrene, polymethyl methacrylate, silicon dioxide, titanium dioxide, a mixture of two or more of them, one of these as a core, and another one or more as a core. A core-shell structure coated with can also be used.

  The regularity in the arrangement of colloidal particles is not particularly limited. For example, a face-centered cubic structure, a body-centered cubic structure, a simple cubic structure, etc. may be used. preferable.

  Colloidal particle production methods include, for example, UV (ultraviolet) polymerization, emulsion polymerization, suspension polymerization, two-step template polymerization, chemical vapor reaction, electric furnace heating, thermal plasma, laser heating Gas evaporation method, coprecipitation method, homogeneous precipitation method, compound precipitation method, metal alkoxide method, hydrothermal synthesis method, sol-gel method, spray method, freezing method, nitrate decomposition method and the like.

Then, after the colloidal particles are suspended in the base material, a colloidal crystal structure is formed in the base material by various methods (for example, gravity sedimentation method, capillary method, electrophoresis method, substrate pulling method, etc.).
In the substrate pulling method, the base material solution in which colloidal particles are suspended is applied on the substrate, dried, and then peeled off from the substrate, whereby the color tone changing sheet material 50 can be produced.
According to the substrate pulling method, since the colloidal particles form a colloidal crystal structure in a self-organizing manner in the base material, the color tone changing sheet material 50 can be easily produced.

The microdomain structure is a structure in which different types of polymers are chemically bonded to form a block copolymer.
Examples of the block copolymer include poly (styrene-co-isoprene) block copolymer, poly (styrene-co-butadiene) block copolymer, poly (styrene-co-vinylpyridine) block copolymer, poly (Styrene-co-ethylenepropylene) block copolymer.
The block copolymer may have a plurality of repeating units.

The thin film stack structure is, for example, a structure in which thin films having a thickness of about 5 nm to about 20 nm are stacked at intervals of about 100 nm to about 1000 nm.
By interposing an intermediate made of an organic or inorganic polymer material having transparency between the thin films, the thin films to be laminated can be maintained at a predetermined interval.
As the thin film, for example, metal thin films made of various simple metals (gold, silver, copper, aluminum, etc.) and various alloys, and thin films of various dielectrics (titanium oxide, silica, etc.) may be used.

The color tone changing sheet material 50 needs to have a sufficient thickness so that the amount of deformation in the thickness direction of the color tone changing sheet material 50 is sufficiently secured by the pressing state by the pressing member 30.
For example, the thickness range of the color change sheet material 50 may be about 0.001 mm to about 10 mm, preferably about 0.01 mm to about 1.00 mm.

By making the color tone changing sheet material 50 sufficiently thick, the color tone changing sheet material 50 is sufficiently deformed in the pressed state, causing a change in the arrangement of the particles, and the color tone changing sheet material 50 is visually recognized from the outside of the display device 10. The color tone will change.
For example, when a colloidal crystal structure is used for the color tone changing sheet material 50, when the color tone changing sheet material 50 is deformed, the colloidal crystal structure changes according to the amount of deformation, and the structural color changes.

In addition to the regularly arranged particles, the base material of the color change sheet material 50 may include a dye, a pigment, a light scattering material, and the like.
A color conversion layer may be provided between the color tone changing sheet material 50 and the elastic sheet material 20.

  Incidentally, the present applicant, as the color change sheet material 50, 97 wt% of NK ester AM-90G (methoxypolyethylene glycol # 400 acrylate) manufactured by Shin-Nakamura Chemical Co., Ltd., and NK ester A manufactured by Shin-Nakamura Chemical Co., Ltd. The thickness of the base material is obtained by arranging and distributing silicon dioxide having a particle size of about 200 nm as colloidal crystals on a base material polymerized from a mixed solution in which -600 (polyethylene glycol # 600 diacrylate) is mixed at a ratio of 3 wt%. A colloidal crystal sheet having a thickness of about 0.5 mm is used.

[Color display on display R]
In the initial state, the pressing surface 30a of the pressing member 30 is at the most retracted initial position, and the color change sheet material 50 is in a non-pressed state (steady state), so the arrangement of colloidal particles constituting the color change sheet material 50 is Since the structural color of the color tone changing sheet material 50 is substantially red without being pressed, the display portion R can be displayed in red.

  Then, the pressing surface 30a of the pressing member 30 is moved to the transparent plate 12 side, and each sheet material (black sheet material 40, elastic sheet material 21, and the like) stacked between the pressing surface 30a and the back surface 12b of the transparent plate 12 is moved. When the color change sheet material 50 and the elastic sheet material 20) are sandwiched and pressed, the color change sheet material 50 is deformed in the thickness direction, and the color change sheet material 50 develops a structural color according to the deformation amount.

That is, as the amount of deformation in the thickness direction of the color tone changing sheet material 50 increases, the structural color changes in the order of red → green → blue → colorless and transparent.
As a result, according to the amount of movement of the pressing surface 30a of the pressing member 30, red, green, and blue colors can be displayed on the display portion R.

  Further, when the structural color of the color tone changing sheet material 50 becomes colorless and transparent, the black color of the black sheet material 40 provided on the lower side (back) of the color tone changing sheet material 50 is changed to the stacked sheet materials 21, 50, 20 is visible from the outside of the display device 10, so that black display can be performed on the display portion R.

As described above, in the display device 10, the structural color of the color change sheet 50 constituting the pixel P is changed to red, green, blue, by appropriately changing the moving amount (pressed state) of the pressing surface 30 a of each pressing member 30. When the structural color is red, green, or blue, the structural color is displayed on the display unit R. When the structural color is colorless and transparent, the black color of the black sheet 40 is displayed on the display unit. R can be displayed.
Therefore, according to the display device 10, it is possible to arbitrarily set the color tone of each pixel P, and a desired image composed of a plurality of pixels P can be displayed on the display unit R in full color.

[Operations and effects of the first embodiment]
In the display device 10 of the first embodiment, the pixel P of the display device 10 is configured by a portion of the color tone changing sheet material 50 that is pressed against the pressing surface 30a of each pressing member 30.
The adjacent portions 50α, 50β, 50γ constituting the pixel P in the color tone changing sheet material 50 are continuously integrated.

By the way, in the conventional display apparatus, each elastic sheet material 20 and 21 was not provided.
Therefore, even if only the portion (pixel) 50β of the color tone changing sheet material 50 is pressed and deformed by the pressing surface 30a of the pressing member 30, the deformation of the portion 50β is inhibited by the adjacent portions 50α and 50γ. There is a problem that it is difficult to freely deform only the portion 50β, and good color development of the portion 50β cannot be obtained.

Therefore, in the conventional display device, gaps and grooves are provided between the portions (pixels) 50α, 50β, and 50γ of the color tone changing sheet material 50, and the portions 50α, 50β, and 50γ are deformed and swelled in the spaces and grooves. The portions 50α, 50β, and 50γ are freely deformed by letting out the portions.
However, if gaps or grooves are provided between the portions 50α, 50β, 50γ of the color tone changing sheet material 50, there is a problem that the pixels P cannot be made dense by the gaps and grooves.

In the display device 10 according to the first embodiment, the color change sheet material 50 is sandwiched from both the front surface 50a and the back surface 50b by the elastic sheet materials 20 and 21, and substantially the entire surface is brought into contact therewith.
Therefore, free deformation of each portion (pixel) 50α, 50β, 50γ of the color change sheet material 50 is allowed by each elastic sheet material 20, 21, and only the portion 50β is pressed by the pressing surface 30a of the pressing member 30 to be deformed. In this case, the deformation of the portion 50β is not hindered by the adjacent portions 50α and 50γ, and only the portion 50β can be freely deformed, so that good color development of the portion 50β can be obtained. .

Therefore, according to the first embodiment, the display device 10 capable of making the pixels P dense can be provided at a low cost with a simple configuration in which only the elastic sheet materials 20 and 21 are provided.
Note that the properties (for example, thickness, hardness, surface friction coefficient, elastic force, etc.) of the elastic sheet materials 20 and 21 are provided in the color change sheet material 50 so that the above-mentioned action and effect can be obtained with certainty. It is necessary to optimize accordingly.

In the first embodiment, in the non-pressed state (steady state) of the color tone changing sheet material 50, the sheet materials 21, 50, and 20 are laminated so as to be in contact with each other.
However, in the initial state, the sheet materials 21, 50, and 20 may be arranged separately from each other. Even in this case, the sheet materials 21, 50, and 20 are pressed between the pressing member 30 and the transparent plate 12. Then, since the substantially whole surface of each sheet material 21, 50, and 20 contacts and it will be in a lamination state, the said effect | action and effect are acquired.

Second Embodiment
FIG. 3 is a cross-sectional view taken along the line XX in FIG. 1A, and is a schematic cross-sectional view for explaining a main-part vertical cross-sectional structure of the display device 100 of the second embodiment.
The display device 100 includes a storage case 11, a transparent plate 12, elastic sheet materials 20 and 21, a pressing member 101, a black sheet material 40, a color tone changing sheet material 50, and the like.

  The display device 100 according to the second embodiment is different from the display device 10 according to the first embodiment (see FIG. 2) in that only one pressing member 101 is provided and the stacked sheet materials (black sheet material 40, The only point is that the flat pressing surface 101a of the pressing member 101 presses substantially the entire surface of the elastic sheet material 21, the color tone changing sheet material 50, and the elastic sheet material 20).

That is, the pressing surface 101a of the pressing member 101 in the second embodiment has the same configuration as that in which the pressing surfaces 30a of the pressing members 30 in the first embodiment are continuously integrated.
Therefore, in the second embodiment, the pixels P as in the first embodiment are not provided, and the entire surface of the display unit R displays a single color.

In the display device 100 of the second embodiment, as in the display device 10 of the first embodiment, the color change sheet material 50 is sandwiched from both the front surface 50a and the back surface 50b by the elastic sheet materials 20 and 21, and the substantially entire surface is contacted. ing.
For this reason, the elastic sheet materials 20 and 21 are allowed to freely deform almost the entire surface of the color tone changing sheet material 50, and even when the area of the color tone changing sheet material 50 is relatively large, the substantially entire surface of the color tone changing sheet material 50 is sufficient. Therefore, the structural color can be controlled satisfactorily.

  In the second embodiment, since it is possible to reduce the pressing force required to sufficiently deform the substantially entire surface of the color tone changing sheet material 50, the manufacturing cost of the pressing member 101 can be reduced, and the pressing force can be reduced. The driving energy of the member 101 can be reduced.

  Therefore, according to the second embodiment, with a simple configuration in which only the elastic sheet materials 20 and 21 are provided, a small pressing force can be used to obtain a good structural color by deforming substantially the entire surface of the color tone changing sheet material 50. The display device 100 that can be completed can be provided at low cost.

<Third Embodiment>
FIG. 4 is a cross-sectional view taken along the line XX in FIG. 1A, and is a schematic cross-sectional view for explaining a main-part vertical cross-sectional structure of the display device 110 of the third embodiment.
The display device 110 includes a storage case 11, a transparent plate 12, an elastic sheet material 21, a pressing member 101, a black sheet material 40, a color tone changing sheet material 50, and the like.

The display device 110 according to the third embodiment is different from the display device 10 according to the first embodiment (see FIG. 2) only in that the elastic sheet material 20 is omitted.
Therefore, according to the third embodiment, since the function of the elastic sheet material 20 cannot be obtained, the same functions and effects as those of the first embodiment can be obtained, although they are inferior to the first embodiment.

<Fourth embodiment>
FIG. 5 is a cross-sectional view taken along the line XX in FIG. 1A, and is a schematic cross-sectional view for explaining a main part longitudinal cross-sectional structure of the display device 120 of the fourth embodiment.
The display device 120 includes a storage case 11, a transparent plate 12, an elastic sheet material 20, a pressing member 101, a black sheet material 40, a color tone changing sheet material 50, and the like.

The display device 120 according to the fourth embodiment differs from the display device 10 according to the first embodiment (see FIG. 2) only in that the elastic sheet 21 is omitted.
Therefore, according to the fourth embodiment, since the function of the elastic sheet 21 cannot be obtained, the same functions and effects as those of the first embodiment can be obtained although they are inferior to the first embodiment.

<Fifth Embodiment>
FIG. 6 is a cross-sectional view taken along the line XX in FIG. 1A, and is a schematic cross-sectional view for explaining a main-part vertical cross-sectional structure of the display device 130 of the fifth embodiment.
The display device 130 includes a storage case 11, a transparent plate 12, elastic sheet materials 20 and 21, a pressing member 101, a color tone changing sheet material 50, and the like.

The display device 130 of the fifth embodiment is different from the display device 10 of the first embodiment (see FIG. 2) only in that the black sheet material 40 is omitted and the elastic sheet material 21 is colored black. is there.
Therefore, according to the fifth embodiment, the same operation and effect as the first embodiment can be obtained.

In addition, according to the fifth embodiment, since the black sheet material 40 of the first embodiment is not used, the number of components can be reduced and further cost reduction can be achieved.
In order to color the elastic sheet material 21 in black, for example, a black dye or pigment may be included in the forming material of the elastic sheet material 21.

<Sixth Embodiment>
FIG. 7 is a cross-sectional view taken along the line XX in FIG. 1A, and is a schematic cross-sectional view for explaining a main-part vertical cross-sectional structure of the display device 140 of the sixth embodiment.
The display device 140 includes a storage case 11, a transparent plate 12, elastic sheet materials 20 and 21, a pressing member 101, a color tone changing sheet material 50, and the like.

  The display device 140 of the sixth embodiment is different from the display device 130 (see FIG. 6) of the fifth embodiment in that the elastic sheet material 21 is divided for each pixel P, and each of the divided elastic sheet materials 21 is different. It is only a point that the space S is provided between them.

  Therefore, in the sixth embodiment, the deformation of the respective portions (pixels) 50α, 50β, and 50γ of the color tone changing sheet material 50 is allowed in the space S due to the space S of the elastic sheet material 21 provided for each pixel P. For this reason, the color development of the pixel P can be further improved in combination with the operation and effect of the first embodiment.

<Another embodiment>
[1] In the display device 140 (see FIG. 7) according to the sixth embodiment, the elastic sheet material 21 is divided for each pixel P to provide the gap S.
However, the elastic sheet material 20 may be divided for each pixel P to provide the gap S. Even in this case, the same operation and effect as in the sixth embodiment can be obtained.

[2] The elastic sheet materials 20 and 21 in the display device 10 (see FIG. 2) of the first embodiment are deformable members (for example, various wax materials) that can allow the color change sheet 50 to be freely deformed. And various oil materials), any member may be used, and even in that case, the same operation and effect as in the first embodiment can be obtained.
In addition, the deformation | transformation permission member corresponded to the elastic sheet material 20 needs to have translucency.

  [3] The present invention may be implemented by appropriately combining the above-described embodiments. In this case, the functions and effects of the combined embodiments are combined, or a synergistic effect of the combined embodiments is obtained. Can do.

  The present invention is not limited to the description of each aspect and each embodiment. Various modifications are also included in the present invention as long as those skilled in the art can easily conceive without departing from the scope of the claims. The contents of papers, published patent gazettes, patent gazettes, etc. specified in this specification are incorporated by reference in their entirety.

10, 100, 110, 120, 130, 140 ... display device 11 ... storage case 12 ... transparent plate 12a ... surface 12b of transparent plate 12 ... back surface 20 of transparent plate 12 ... elastic sheet material (second deformation allowing member)
21 ... Elastic sheet material (first deformation allowing member)
30, 101 ... pressing members 30a, 101a ... pressing surface 40 ... black sheet material 50 ... color tone changing sheet material 50a ... surface 50b of color tone changing sheet material 50 ... back surface 50α to 50γ of color tone changing sheet material 50 ... color tone changing sheet material 50 Part P constituting each pixel P in FIG.... Pixel S...

Claims (7)

It has particles arranged at regular intervals, and an elastically deformable base material interposed between the particles. The base material is elastically deformed to change the particle interval, and according to the particle interval. A color tone changing sheet material that changes the color tone by reflecting visible light of a specific wavelength;
A transparent plate provided on the display side;
A pressing member that elastically deforms the substrate by pressing the color tone changing sheet material toward the transparent plate and deforming the color tone changing sheet material in a thickness direction;
A first deformation allowing member provided between the color change sheet material and the pressing member;
A display device comprising a second deformation-permitting member having translucency provided between the transparent plate and the color change sheet material;
The display device, wherein the first deformation allowing member and the second deformation allowing member allow the color changing sheet material to freely deform when the color changing sheet material is pressed by the pressing member. It has particles arranged at regular intervals, and an elastically deformable base material interposed between the particles. The base material is elastically deformed to change the particle interval, and according to the particle interval. A color tone changing sheet material that changes the color tone by reflecting visible light of a specific wavelength;
A transparent plate provided on the display side;
A pressing member that elastically deforms the substrate by pressing the color tone changing sheet material toward the transparent plate and deforming the color tone changing sheet material in a thickness direction;
A display device comprising a first deformation allowing member provided between the color tone changing sheet material and the pressing member,
The display device according to claim 1, wherein the first deformation allowing member allows the color changing sheet material to be freely deformed when the color changing sheet material is pressed by the pressing member. It has particles arranged at regular intervals, and an elastically deformable base material interposed between the particles. The base material is elastically deformed to change the particle interval, and according to the particle interval. A color tone changing sheet material that changes the color tone by reflecting visible light of a specific wavelength;
A transparent plate provided on the display side;
A pressing member that elastically deforms the substrate by pressing the color tone changing sheet material toward the transparent plate and deforming the color tone changing sheet material in a thickness direction;
A display device comprising a second deformation-permitting member having translucency provided between the transparent plate and the color change sheet material;
The display device according to claim 2, wherein the second deformation allowing member allows the color changing sheet material to be freely deformed when the color changing sheet material is pressed by the pressing member. The display device according to claim 1 or 2,
The display device according to claim 1, wherein the first deformation allowing member is black. In the display device according to any one of claims 1 to 4,
The pressing member is provided for each pixel,
The display device, wherein the pixel is constituted by a portion of the color tone changing sheet material pressed by each pressing member. The display device according to claim 5,
The display device according to claim 1, wherein the deformation permission member is divided for each pixel, and a gap is provided between the divided deformation permission members. In the display device according to any one of claims 1 to 6,
The display device, wherein the deformation allowing member is an elastic body.

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