JP4968953B2 - Functional substrate having antireflection function and manufacturing method thereof - Google Patents

Description

  The present invention relates to a functional substrate including a non-flat layer or a base layer made of an organic polymer on a substrate and a plurality of types of microprojections, and a manufacturing method, and the functional substrate is provided on the front surface of a display. The present invention relates to a display image quality improvement technique that improves display image quality.

  Patent Document 1 describes an example in which a columnar microprojection group is applied as an antireflection layer. The antireflection layer of Patent Document 1 is composed of a group of columnar microprojections having a diameter of 1 μm or less mainly composed of PMMA, which is extended from a thin film (sheet) mainly composed of PMMA (PolyMethylMethacrylate) having a thickness of 0.1 μm or less. Is. By adjusting the diameter, interval, height, or cross-sectional shape of the columnar microprojections, the dielectric region of the columnar microprojections in the layer composed of the columnar microprojections and the absence of the columnar microprojections Since the ratio to the air region can be changed, the effective refractive index in the reflective layer composed of columnar microprojections can be arbitrarily adjusted, thereby suppressing the reflected light on the functional substrate surface. it can.

Further, in Patent Document 1, a conical microprojection is formed so that the refractive index in the antireflection layer gradually changes from the refractive index of the functional substrate to the refractive index of air, thereby discontinuity due to the difference in refractive index. It has been proposed that reflection can be suppressed by eliminating the surface.
Since the antireflection layer having such a structure can reduce the reflectance, reflection of external light can be suppressed. However, under a bright light source such as the sun or bright illumination light, the antireflection layer described in Patent Document 1 may not have sufficient antireflection over the entire wavelength range of external light. There is a defect that the light is reflected in the mirror and reflected on the viewing side. When the reflective layer as described in Patent Document 1 is provided on the surface of the display, the light of outside light is superimposed on the display image, and the display image quality is greatly impaired.

  In Patent Document 2, the surface exhibits anti-glare properties in order to improve specular reflection on the display surface in which external light, which is a drawback of Patent Document 1, is generated under a bright light source such as the sun or bright illumination light. An anti-glare antireflection article composed of the first fine uneven structure and the second fine uneven structure having a period shorter than the visible light wavelength exhibiting the antireflection function is presented. However, even in antiglare antireflection articles, when the surface of the antiglare antireflection articles is exposed to sunlight or bright illumination light, specular reflection is suppressed, but the display surface is whitish due to light diffused in all directions. Become.

That is, when sunlight or bright illumination light is incident on the antiglare antireflection article, the amount of reflected light is reduced by the antireflection function. It is only scattered in the azimuth and the amount of reflected light is not reduced. As a result, the screen becomes whitish on the display surface, thereby reducing the contrast ratio and degrading the display image quality.
JP 2004-170935 A JP 2008-209867 A

  As described above, even if the structures described in Patent Document 1 and Patent Document 2 are provided on the display surface of the display, there is a drawback that the image quality is greatly impaired. That is, when sunlight or bright external light hits the surface of the functional substrate described in Patent Document 1, the specular reflection light from the functional substrate is superimposed on the display image of the display, so that the display image quality is greatly impaired. Further, even if the structure described in Patent Document 2 is provided on the display surface of the display, the display screen becomes whitish and the contrast ratio is lowered, so that the image quality is lowered.

In order to solve the above problems, the functional substrate according to the present invention is provided with a non-flat layer having a non-uniform surface shape on a flat transparent substrate, and a plurality of first microprojections are formed on the surface of the non-flat layer. A first microprojection group made of an object, and a second microprojection group made of a plurality of second microprojections having a cross-sectional shape different from that of the first microprojection.
Here, the transparent substrate constituting the functional substrate constituting the functional substrate, the non-flat layer, the first microprojection group, and the second microprojection group are formed of an organic polymer. The period of the undulation is sufficiently larger than the wavelength of visible light (for example, 1 μm or more), and the height difference of the undulation is also sufficiently larger than the wavelength of visible light (for example, 1 μm or more). The diameter of the first microprojection is at least larger than 1/4 of the wavelength of visible light (for example, 100 nm or more), and the height is also larger than 1/4 of the wavelength of visible light (for example, 100 nm or more). A functional substrate characterized in that the height of the projection is higher than the height of the non-flat layer and the first microprojection, and the width of the second microprojection is greater than ¼ of the wavelength of visible light; and In its manufacturing method Related.

  In addition, said transparent substrate should just be transparent, and includes the film and sheet | seat comprised by inorganic substances, such as glass, and an organic polymer. In the present invention, unless otherwise specified, the organic polymer means only the organic polymer, and includes a concept in which an inorganic filler is added to the organic polymer or a physical property is changed by chemically modifying the organic polymer. I use it.

In the present invention, the undulation period of the non-flat layer is preferably not less than the visible light wavelength, for example, 1 μm or more, but the effect does not change even if the undulation period is 1 μm or less. A width that does not affect the resolution of the display, for example, 100 μm or less is preferable. The height of the second microprojection is preferably constant, but may be random. In addition, the second microprojection preferably has a shape in which the tip end portion is smaller than the width of the bottom portion and spreads toward the end.
In the present invention, the cross section of the first microprojection is not necessarily circular, and may be an ellipse, a polygon, an asymmetric shape, or the like.
Further, the cross section of the second microprojection is not necessarily rectangular, and may be trapezoidal, asymmetrical, or the like.

The first microprojection group in which a large number of first microprojections are formed on the non-flat layer of the present invention and the second microprojection group in which a large number of second microprojections are present are provided. The substrate includes a non-flat layer having a large undulation, a first microprojection having a sufficiently small pitch width compared to the undulation width of the non-flat layer, and the height of the non-flat layer and the first microprojection. Using a precision mold (mold) that is the opposite of the shape of the high second microprojections, press against the resin layer such as thermoplastic resin, thermosetting resin, or photocurable resin on the transparent substrate. A layer in which a non-flat layer, a first microprojection group, and a second microprojection group are formed is prepared.
The mold is made of, for example, quartz, silicon or metal. By pressing the mold against the resin layer and then pulling the mold away from the resin layer, the desired non-flat layer, the first minute layer, etc. are formed by the thermoplastic resin, thermosetting resin, or photocurable resin that has entered the mold. Protrusions and second microprojection groups are formed.

The non-flat layer, the first microprojection group, and the second microprojection group are preferably self-supporting, and are preferably in a form capable of self-supporting from a transparent substrate. Further, the tip or the entire surface of each microprojection in the first microprojection and the second microprojection is chemically modified by chemical plating or the like, and reflection of the side surfaces of the first microprojection and the second microprojection is performed. The rate may be controlled.
The first microprojection and the second microprojection constituting the first microprojection group and the second microprojection group formed on the surface of the non-flat layer are larger than the thickness and thickness of the tip portion. The one where the thickness and thickness of a bottom face part are larger is preferable. Thereby, it is advantageous in securing the self-supporting property and the self-supporting property of the resin-made first microprojections and the second microprojections, and the first microprojections and the second microprojections are It has a part which becomes thin toward the front-end | tip part from the base which contact | connected the non-flat layer. Furthermore, it is preferable that the non-flat layer, the first microprojection group, and the second microprojection group are the same organic polymer as the transparent substrate made of an organic polymer. In particular, it is preferable that the non-flat layer, the first microprojection, and the second microprojection have an integral structure. Furthermore, it is preferable that the non-flat layer and the transparent substrate are completely adhered. In addition, since the first microprojections and the second microprojections of the present invention can have a structure in which the first microprojections and the second microprojections are close to each other, the individual first microprojections can be formed. It is possible to make the protrusion and the second minute protrusion difficult to be crushed and difficult to remove from the non-flat layer.

  The above structure is a structure in the case where the non-flat layer, the first microprojection group, and the second microprojection group are integrally formed on the transparent substrate, but the non-flat layer provided on the transparent substrate. And a first mold having a shape opposite to the shape formed by combining the first microprotrusions having a large number of the first microprotrusions, a thermoplastic resin, a thermosetting resin, or a photocurable resin. Thermoplastic resin using a second mold having a shape opposite to that of the second microprojection group in which a large number of second microprojections are present on the first substrate obtained by being pressed against the resin layer made of A functional substrate is produced by transferring a second group of fine protrusions obtained by pressing a resin layer made of a resin, a thermosetting resin, a photo-curing resin, or the like, and firmly fixing it with an adhesive or the like. You may divide and form.

In the present invention, a non-flat layer is formed on a flat transparent substrate made of glass or an organic polymer, and a first micro-projection group and a second micro-projection group are formed on the surface of the non-flat layer. However, these are manufactured integrally with a transparent substrate.
The waviness period of the non-flat layer on the opposite side of the transparent substrate is sufficiently larger than the wavelength of visible light for the purpose of preventing glare from outside light, and the height difference of the waviness is larger than the wavelength of visible light. The diameter and height of the protrusions are larger than ¼ of the wavelength of visible light for the purpose of suppressing reflection of external light, and the height of the second minute protrusions for the purpose of blocking external light is the non-flat layer and the first. The functional substrate is characterized by being higher than the height of the microprojections and having a width larger than ¼ of the wavelength of visible light.
Further, the bottom surface portion larger than the thickness and thickness of the tip portion of the first microprojection and the second microprojection constituting the first microprojection group and the second microprojection group is the non-flat layer side. A functional substrate formed in the above is provided.

The material constituting the non-flat layer, the first microprojections, and the second microprojections is a thermoplastic polymer material, an uncured photocurable resin, a thermosetting resin, or a thermoplastic photocurable polymer. A material may be used. For example, the main components of the non-flat layer and the first and second microprojections are polyethylene (PE), polypropylene (PP), polyvinyl alcohol (PVA), polyvinylidene chloride (PVDC), polyethylene terephthalate (
PET), polyvinyl chloride (PVC), polystyrene (PS), ABS resin, AS resin, polyamideimide (PA), polyacetal, polybutylene terephthalate (PBT), reinforced polyethylene terephthalate (reinforced PET), polycarbonate (PC) , Modified polyphenylene ether (m-PPE), polyphenylene sulfide (PPS), polyether ether ketone (PEEK), liquid crystalline polymer (LCP), fluororesin (FR), polyarylate (PAR), polysulfone (PSU), poly Thermoplastic resins such as ether sulfone (PES), polyamideimide (PAI), polyetherimide (PEI), thermoplastic polyimide (TPI), cycloolefin polymer, polymethyl methacrylate, polylactic acid, and pheno Resin (PF), melamine resin (MF), urea resin (UF), epoxy resin (EP), unsaturated polyester resin (UP), alkyd resin, silicon resin, diallyl phthalate resin (PDAP), polyimide (PI), There are thermosetting resins such as polyamide bismaleimide, triazine (BT resin), and polybisamide triazole, a material in which two or more of these are mixed, or a photocurable material to which a photosensitive substance is added. Moreover, you may add antioxidant, a flame retardant, etc. to these materials.

  The transparent substrate having the first microprojections and the second microprojections formed on the surface of the non-flat layer is opposite to the shapes of the non-flat layer, the first microprojections, and the second microprojections. Using a mold having a shape of the above, a non-flat layer, a first microprojection group, and a second microprojection group are formed on a transparent substrate by pressing against a resin layer of a thermoplastic resin or an uncured thermosetting resin. However, when the mold is pressed against the resin layer of the thermoplastic resin and pulled away, the resin press-fitted into the mold is stretched, so the thickness of the first microprojection and the second microprojection Is slightly smaller than the inner diameter in the mold. The lengths of the first microprojections and the second microprojections are longer than the mold depth. The thickness and length of the first microprojection and second microprojection depend on the type of resin used, physical properties (molecular weight, etc.), molding conditions (depth of concave structure, temperature, molding pressure) It is necessary to confirm by various experiments in advance.

  When the resin layer of the thermosetting resin is in an uncured state, the mold is pressed against the resin layer and pulled away, whereby the non-flat layer having the desired shape, the first microprojection group, and the second microprojection group A projection group is formed. Next, a functional substrate having high mechanical strength can be obtained by curing this by heat curing or the like. In curing the thermosetting resin, it is necessary to examine the curing temperature and the heating profile in order to select conditions such that the resin does not melt and flow or deform. It should be noted that a curing agent or a curing accelerator may be added to the thermosetting resin.

That is, according to the first aspect of the present invention, a non-flat layer having a non-uniform surface shape is provided on a transparent substrate, and the surface of the non-flat layer is formed of a plurality of first microprojections. There is provided a functional substrate including a microprojection group and a second microprojection group including a plurality of second microprojections having a cross-sectional shape different from that of the first microprojection.
Further, from the second aspect of the present invention, in the first aspect, the undulation period and height difference of the non-flat layer is larger than the wavelength of visible light, and the diameter and height of the first microprojection are At least one of them is larger than ¼ of the wavelength of visible light, and the height of the second microprojections is higher than the height of the non-flat layer and the first microprojections, and the second microprojections A functional substrate is provided in which the width of the object is greater than ¼ of the wavelength of visible light.

Further, according to a third aspect of the present invention, the transparent substrate has a base layer having a flat surface, and the surface of the base layer has a first microprojection group composed of a plurality of first microprojections and a cross section. There is provided a functional substrate provided with a second microprojection group including a plurality of second microprojections having a shape different from that of the first microprojections.
Also, from the fourth aspect of the present invention, there is a flat base layer on a transparent substrate, and the surface of the base layer is composed of an organic polymer material, and the cross-sectional shape exhibits a polygon. There is provided a functional substrate provided with a second group of microprojections made of a plurality of second microprojections.

From the fifth aspect of the present invention, a plurality of non-flat layers having a nonuniform surface shape on a transparent substrate and an organic polymer material having a polygonal cross-sectional shape. A functional substrate is provided in which a second group of microprojections made of the second microprojections is provided.
In addition, from a sixth aspect of the present invention, a plurality of first and second non-flat layers or base layers provided on a transparent substrate and an organic polymer material having a circular cross-sectional shape are used. A first group of microprojections composed of one microprojection, and a second group composed of a plurality of second microprojections formed using the organic polymer material and having a polygonal cross-sectional shape. Using a mold that is the opposite of the shape formed by combining two or more of the microprojections, or pressing it against a resin layer made of a thermoplastic resin, a thermosetting resin, or a photocurable resin, A functional substrate having a shape formed by combining a non-flat layer or a base layer with one of a first microprojection group and a second microprojection group, or a combination of two or more on a transparent substrate. Production The law is provided.

Further, from the seventh aspect of the present invention, a solid body is provided on the surface of the opaque substrate, and the opaque substrate and the solid body or the solid body are formed so as to cover the non-flat layer, The non-flat surface of the non-flat layer has a first micro-projection group composed of a plurality of first micro-projections, and has a cross-sectional shape different from the first micro-projections adjacent to the solid body. There is provided a functional substrate comprising two microprojections.
According to an eighth aspect of the present invention, a solid body is provided on the surface of the opaque substrate, and the opaque substrate and the solid body or only the solid body are covered with the base layer, and the base layer on the opposite side of the opaque substrate. Is flat, and a flat surface of the base layer has a first group of microprojections made of a plurality of first microprojections, and the cross-sectional shape of the first microprojections is adjacent to the solid body. There is provided a functional substrate including a second microprojection different from the projection.

Further, from the ninth aspect of the present invention, a solid body is provided on the surface of the opaque substrate, and the opaque substrate and the solid body or the solid body are formed so as to cover the non-flat layer, The non-flat surface of the non-flat layer is formed of an organic polymer material adjacent to a solid body, and has a second microprojection having a polygonal cross-sectional shape. A functional substrate is provided.
According to a tenth aspect of the present invention, a solid body is provided on the surface of the opaque substrate, the opaque substrate and the solid body or only the solid body are covered with the base layer, and the base layer on the opposite side of the opaque substrate is provided. Is formed by using the organic polymer material adjacent to the solid body on the flat surface of the base layer, and a second microprojection having a polygonal cross-sectional shape is formed on the flat surface of the base layer. There is provided a functional substrate including the above-described features.

Further, from the eleventh aspect of the present invention, a solid body is provided on the surface of the opaque substrate, and only the solid body is covered with the base layer, and the organic polymer material is used on the flat surface of the base layer. A functional substrate is provided in which a first group of microprojections made of a plurality of first microprojections is provided.
According to a twelfth aspect of the present invention, a plurality of first layers that are configured using a non-flat layer or a base layer provided on a substrate and an organic polymer material and have a circular cross-sectional shape. A thermoplastic resin, a thermosetting resin, or a photo-curing resin using a first mold having a shape opposite to the shape of any one of the first micro-projections made of the above-mentioned micro-projections or a combination of the two. The first substrate obtained by being pressed against a resin layer made of a functional resin or the like is composed of a plurality of second microprojections formed using the organic polymer material and having a polygonal cross-sectional shape. Using a second mold having a shape opposite to the shape of the second minute projection group, a second minute obtained by being pressed against a resin layer made of a thermoplastic resin, a thermosetting resin, a photocurable resin, or the like. Transfer the protrusions and adhesive Functional substrate manufacturing method characterized by integrated firmly secured is provided by.

  According to the present invention, the first microprojection group in which the non-flat layer having a nonuniform surface is provided on the flat transparent substrate, and the first microprojections are present on the surface of the nonflat layer. And a functional substrate including a second microprojection group in which a large number of second microprojections are present, the transparent substrate constituting the functional substrate, the non-flat layer, and the first microprojection group and the second microprojection group. The microprojections are made of organic polymer, and for the purpose of preventing glare from outside light, the undulation period of the non-flat layer is sufficiently larger than the wavelength of visible light, and the difference in the level of undulation is also sufficiently larger than the wavelength of visible light. And the diameter and height of the first microprojections extending from the non-flat layer for the purpose of preventing reflection of external light are at least larger than ¼ of the wavelength of visible light. The height of the microprojections of the non-planar layer and the first By making it higher than the height of the small protrusion and making the width larger than ¼ of the wavelength of visible light, the waviness period and height difference of the non-flat layer, and the first microprojection and the second microprojection Since it is possible to provide a functional substrate whose thickness, length, and height can be freely controlled within the range, it has optimum anti-reflection of external light, anti-glare of external light, and blocking of external light. A functional substrate can be obtained. In addition, since an organic polymer is used to form the non-flat layer and the microprojections, an inexpensive functional substrate that can be realized by a simple manufacturing method called pressing can be provided.

(Embodiment 1)
The present embodiment will be described with reference to FIGS.
FIG. 1 shows a non-planar layer 102 on a flat transparent substrate 101, a first microprojection group 104 in which many first microprojections 103 are present, and a second in which many second microprojections 105 are present. It is a schematic perspective view of the functional board | substrate 100 provided with the microprotrusion group 106 of this.
FIG. 2 shows the cross section 107 of FIG. The material of the non-flat layer 102, the first microprojection 103, and the second microprojection 105 is an organic polymer, for example, PMMA. The molecular weight is approximately 18000 to 600,000. The transparent substrate 101 made of the same organic polymer as the non-flat layer 102 is formed in close contact with the non-flat layer 102.

The first microprojections 103 formed on the surface of the non-flat layer 102 are aligned in the vertical and horizontal directions, but may be randomly formed, and each has the same shape or a similar shape. Also good. Further, the height and thickness may be constant or random. The second microprojections 105 are aligned in the horizontal direction, but may be aligned in the vertical and horizontal directions.
The non-flat layer 102 in close contact with the surface of the transparent substrate 101 has a period of undulation of the non-flat layer 102 sufficiently larger than the wavelength of visible light (for example, 1 μm or more) for the purpose of preventing glare of outside light. The height difference is also sufficiently larger than the wavelength of visible light (for example, 1 μm or more), and the first microprojection 103 extends from the non-flat layer 102 for the purpose of suppressing reflection of external light. It is preferable that the diameter of the microprojection 103 is at least larger than 1/4 of the wavelength of visible light (for example, 100 nm or more), and the height is also larger than 1/4 of the wavelength of visible light (for example, 100 nm or more). For the purpose of blocking external light, the height and width of the second microprojection 105 are higher than the heights of the non-flat layer 102 and the first microprojection 103, and the width is the wavelength of visible light. Preferably it is greater than 1/4. Thus, the function of allowing the wavy period and height difference of the non-flat layer 102 and the thickness, length, and height of the first microprojection 103 and the second microprojection 105 to be freely controlled within the range. Since the functional substrate 100 can be provided, the functional substrate 100 having the optimum antireflection of external light, antiglare of external light, and blocking of external light can be obtained.

In addition, since an organic polymer is used to form the non-flat layer 102, the first microprojections 103, and the second microprojections 105, an inexpensive functional substrate 100 that can be realized by a simple manufacturing method called pressing. Obtainable.
FIG. 3 is an enlarged view of a part of FIG. It can be seen from FIG. 3 that the first microprojection 103 has a conical shape in which the tip end portion is smaller than the diameter of the bottom surface portion and is divergent. Thus, the first microprojection 103 has a structure that does not easily peel off from the non-flat layer 102 because it has a divergent shape that becomes narrower from the bottom surface portion in contact with the surface of the non-flat layer 102 to the tip portion. Further, since the first microprojection 103 is the same organic polymer as the material of the non-flat layer 102, the first microprojection 103 and the non-flat layer 102 are integrated in a strong state.
Moreover, you may make the front-end | tip part of the 1st microprojection 110 into a flat shape like FIG. Also in this structure, the bottom surface of the first microprojection 110 is formed integrally with the non-flat layer 102 as in FIG. Further, since the first microprojection 110 is made of the same organic polymer as the material of the non-flat layer 102, the first microprojection 110 and the non-flat layer 102 are in a strong state.

FIG. 5 is an explanatory view for producing the functional substrate 107 of FIG.
(A) is the transparent substrate 101.
(B) is obtained by applying a PMMA resin layer 121 having a molecular weight of 200,000 to the surface of the transparent substrate 101, for example. The resin layer 121 is not limited to PMMA, but polyethylene (PE), polypropylene (PP), polyvinyl alcohol (PVA), polyvinylidene chloride (PVDC), polyethylene terephthalate (
PET), polyvinyl chloride (PVC), polystyrene (PS), ABS resin, AS resin, polyamideimide (PA), polyacetal, polybutylene terephthalate (PBT), reinforced polyethylene terephthalate (reinforced PET), polycarbonate (PC) , Modified polyphenylene ether (m-PPE), polyphenylene sulfide (PPS), polyether ether ketone (PEEK), liquid crystalline polymer (LCP), fluororesin (FR), polyarylate (PAR), polysulfone (PSU), poly Thermoplastic resins such as ether sulfone (PES), polyamideimide (PAI), polyetherimide (PEI), thermoplastic polyimide (TPI), cycloolefin polymer, polymethyl methacrylate, polylactic acid, and pheno Resin (PF), melamine resin (MF), urea resin (UF), epoxy resin (EP), unsaturated polyester resin (UP), alkyd resin, silicon resin, diallyl phthalate resin (PDAP), polyimide (PI), Thermosetting resins such as polyamide bismaleimide, triazine (BT resin), polybisamide triazole, a mixture of two or more of these materials, a photo-curing material to which a photosensitive substance is added, and oxidation prevention for these materials It may be added with an agent, a flame retardant and the like. The thickness of the resin layer 121 is the same as that of the first microprojection group 104 in which a large number of non-flat layers 102 and first microprojections 103 exist and the second in which a large number of second microprojections 105 exist. It is necessary to have a sufficient thickness for forming the microprojection group 106, and for example, several μm or more is preferable.

(C) is a process of forming a non-flat layer 102, a first microprojection group 104, and a second microprojection group 106 on the surface of the transparent substrate 101. It is attached.
(D) is a state where the mold 120 is pressed against the resin layer 121.
(E) shows that the mold 120 is separated from the transparent substrate 101, whereby the first microprojection group 104 in which a large number of non-flat layers 102 and first microprojections 103 exist on the transparent substrate 101, and the second microprojections. A state is shown in which a second microprojection group 106 having a large number of projections 105 is formed. The material of the mold 120 may be a silicon wafer, a glass or metal having a smooth surface and a high softening point temperature, an organic material such as polycarbonate, or a laminated structure thereof. By using a thermoplastic resin as the material of the resin layer 121, the mold 120 can be adjusted while adjusting the temperature and time when the non-flat layer 102, the first microprojection group 104, and the second microprojection group 106 are produced. By separating from the resin layer 121, the non-flat layer 102 having the normal shape, the first microprojection group 104, and the second microprojection group 106 can be manufactured. By making the material of the resin layer 121 a photo-curing material, while controlling the light irradiation amount and time at the time of producing the non-flat layer 102 and the first microprojection group 104 and the second microprojection group 106, By separating the mold 120 from the resin layer 121, the non-flat layer 102, the first microprojection group 104, and the second microprojection group 106 having a normal shape can be obtained. Further, the refractive index may be changed by adding ultrafine particles such as silica and gold to the resin layer 121. Further, another monomer may be bonded to the surface of the non-flat layer 102 or the first microprojection 103 and the second microprojection 105, or may be chemically modified by plating.

  As described above, the non-flat layer 102, the first microprojection group 104, and the second microprojection group 106 are integrally molded to obtain the functional substrate 100. The non-flat layer 102 provided on the transparent substrate 101 and the first microprojection group 106 are integrated with each other. A thermoplastic resin, a thermosetting resin, or a photocurable resin using a first mold having a shape opposite to a shape formed by combining a first microprojection group 104 in which a large number of one microprojection 103 exists. Using a second mold having a shape opposite to the shape of the second microprojection group 106 in which a large number of second microprojections 105 exist on the first substrate obtained by being pressed against the resin layer made of The functional substrate 100 is obtained by transferring the second microprojection group 106 obtained by being pressed against a resin layer made of a thermoplastic resin, a thermosetting resin, a photocurable resin, or the like, and firmly fixing it with an adhesive or the like. Make It may be sea urchin split formation.

As described above, the non-flat layer 102 on the surface of the transparent substrate 101, the first microprojection group 104, and the second microprojection group 106 are manufactured by pressing, so that dry etching or photo processing such as a semiconductor process is performed. There is an effect that the functional substrate 100 can be realized at low cost without requiring lithography.
The functional substrate 100 manufactured in this way can provide antireflection of external light, antiglare of external light, and blocking function of external light.
Here, the principle of antireflection will be described first.

FIG. 6 is a diagram for explaining the principle of antireflection of the functional substrate 130 in which the dielectric thin film layer 132 having a low refractive index is formed on the surface of the flat transparent substrate 131. A low-refractive-index dielectric thin film layer 132 is formed on the surface of the transparent substrate 131 by spin coating or sputtering. Here, the refractive index na of the transparent substrate 131 is 1.49, and the refractive index of the dielectric thin film layer 132 is nb. Air refractive index no
Is 1.0. When incident light 133 which is external light enters the dielectric thin film layer 132, the reflected light 134 reflected from the surface of the dielectric thin film layer 132 is prevented from being reflected by the dielectric thin film layer 132 and the transparent substrate 131. It is equal to the magnitude of the reflected light 135 reflected at the interface of the above, and the phase must be reversed.
As a condition for making the sizes equal, the refractive index nb of the dielectric thin film layer 132 needs to be nb = √no × √na. From this equation, when the incident light 133 has a green wavelength of 550 nm with good visibility, the refractive index nb of the dielectric thin film layer 132 is 1.22.
As a condition for making the phase opposite, the film thickness d 1 of the dielectric thin film layer 132 needs to be 1/4 × λ / nb. From this equation, the thickness of the dielectric thin film layer 132 is 112 nm. By setting the refractive index and the film thickness of the dielectric thin film layer 132 to such values, reflection of the incident light 133 having a wavelength of 550 nm is prevented. In order to prevent reflection, the refractive index of the dielectric thin film layer 132 may be reduced to 1.22. However, in reality, no good material for realizing this value is found. A typical low-refractive material magnesium fluoride (MgF2) also has a refractive index of about 1.38, and reflected light in incident light having a wavelength of 550 nm cannot be removed.

Here, it is assumed that there is no multiple reflection at the interface with respect to the incident light 133 and the reflected lights 134 and 135.
In the first microprojection 110 as shown in FIG. 4 in the present invention, the first microprotrusion having a large number of the first microprojections 110 is adjusted by adjusting the diameter, the interval, the height, or the cross-sectional shape. In the structure shown in FIG. 6, the refractive index of the dielectric thin film layer 132 is set to 1. by changing the ratio of the area where the first microprojections 110 exist in the layer of the group 111 to the air area where it does not exist. 22 is possible. Since the film thickness in FIG. 6 corresponds to the height of the first microprojection 110, the height of the first microprojection 110 may be made 112 nm.
In the present invention, the first microprojection 103 as shown in FIG. 3 differs from the first microprojection 110 as shown in FIG. 4 in the principle of antireflection in the following points.
Since the shape of the first microprojection 103 in FIG. 3 is conical, the refractive index in the layer of the first microprojection group 104 in which many first microprojections 103 exist is non-flat. Since the refractive index of the layer 102 gradually changes from the refractive index of air, the discontinuous surface due to the refractive index difference is eliminated. This point is different from that of the structure shown in FIG. 4, and it is possible to suppress reflection by eliminating a discontinuous surface in the refractive index difference.

As described above, the antireflective layer formed by the presence of a large number of the first microprojections 103 and the first microprojections 110 realizes a layer having a low refractive index that could not be realized by the conventional dielectric thin film layer. It becomes possible to do.
In FIG. 7, a flat base layer 108 is provided on one surface of a flat transparent substrate 101, and a first microprojection group 104 in which a large number of first microprojections 103 exist on the surface of the base layer 108, 2 shows a functional substrate 100 provided with a second microprojection group 106 in which a large number of two microprojections 105 exist.

The material of the base layer 108, the first microprojection group 104, and the second microprojection group 106 is an organic polymer such as PMMA. The molecular weight is approximately 18000 to 600,000. The transparent substrate 101 made of the same organic polymer as the base layer 108 is formed in close contact with the base layer 108.
The first microprojections 103 formed on the surface of the base layer 108 are aligned in the vertical and horizontal directions, but may be formed randomly, or each may have the same shape or a similar shape. good. Further, the height and thickness may be constant or random. The second microprojections 105 are aligned in the horizontal direction, but may be aligned in the vertical and horizontal directions.

  Usually, the base layer 108, the first microprojection group 104, and the second microprojection group 106 are integrally formed. However, the base layer 108 and the first microprojection provided on the transparent substrate 101 are formed. A resin layer made of a thermoplastic resin, a thermosetting resin, a photocurable resin, or the like using a first mold having a shape opposite to the shape formed by combining the first microprojection group 104 having a large number of 103. A second mold having a shape opposite to the shape of the second microprojection group 106 in which a large number of second microprojections 105 exist is formed on the first substrate obtained by pressing on the thermoplastic resin, heat The second fine projection group 106 obtained by being pressed against a resin layer made of a curable resin or a photocurable resin is transferred, and is firmly fixed with an adhesive or the like to produce an integrated functional substrate. It can be divided into .

The thickness of the base layer 108 is preferably several μm or more in order to facilitate the formation of the first microprojection group 104 and the second microprojection group 106.
The first microprojection 103 preferably has a diameter and height greater than ¼ of the wavelength of visible light for the purpose of suppressing reflection of external light.
The height and width of the second microprojection 105 are higher than the height of the non-flat layer 102 or the height of the first microprojection 103 for the purpose of blocking external light, and the width is 1 of the wavelength of visible light. Is preferably greater than / 4.
Since the first microprojections 103 and the second microprojections 105 are formed integrally with the base layer 108, they are difficult to peel off. Further, since the first microprojections 103 and the second microprojections 105 are made of the same organic polymer as the material of the base layer 108, they are molded in a strong state and have a structure that is difficult to peel off. As described above, the functional substrate 180 can provide an external light reflection preventing function and an external light blocking function.

  Next, the effect of blocking or suppressing external light in the functional substrate 100 will be described with reference to FIG. In the figure, the outside light 165 is assumed to be 1 for convenience. When the external light 165 is incident on (a) of the second microprojection 105, the size of the external light 165 is reduced by the transmittance of the second microprojection 105 (a) and the next second microprojection 105 is reduced. The light enters the protrusion 105 (b). The external light 165 attenuates every time it passes through the second microprojection 105 until it reaches the first microprojection group 104, but the second microprojection 105 with respect to the external light 165 incident at this angle. Assuming that the respective transmittances are approximately 90%, the size of the external light reaching the first microprojection group 104 is 66% because it passes through the second microprojection 105 four times. . When the reflectance of the first microprojection group 104 is 1%, the magnitude of the reflected light after being in the first microprojection group 104 is 0.66% of the magnitude of the external light 165. When this reflected light passes through the second microprojection 105 (e) to the second microprojection 105 (h), the reflected light 166 has a level of 0.48% with respect to the size of the external light 165. Attenuates until. By providing the second microprojection 105 in this manner, the magnitude of the reflected light with respect to the external light 165 is reduced to approximately 1/180.

On the other hand, FIG. 8B is a diagram showing the magnitude of reflected light when the second microprojection group 106 is not provided. Similarly, the size of the external light 165 is set to 1. As can be seen from the figure, when the reflectance of the first microprojection group 104 is 1%, the magnitude of the reflected light after reaching the first microprojection group 104 is 1% of the magnitude of the external light 165. Therefore, the magnitude of the reflected light with respect to the external light 165 is 1/100.
By providing the second microprojection 105 in this manner, the size of the reflected light 166 is reduced to about ½ compared with the case where the second microprojection 105 is not provided. When the functional substrate 100 shown in FIG. 5 is provided on the front surface of the display, the size of the external light hitting the display can be suppressed, so that display quality is improved.

  In the example of FIG. 8A, since the base layer 108 and the second microprojection 105 are integrally formed of the same material, the transmittance of the base layer 108 and the second microprojection 105 has the same thickness. It will be the same. Since the functional substrate 100 is provided on the front surface of the display, it is preferable that the transmittance of the base layer 108 is as large as possible in order to ensure the luminance of the display. From this, for example, when the transmittance of the base layer 108 is 90%, the transmittance of the second microprojection 105 is also 90% when the thickness of the second microprojection 105 is equal. When only the thickness of the second microprojection 105 is increased, the transmittance is correspondingly reduced. Therefore, the size of the reflected light 166 is reduced accordingly, so that the effect of blocking external light is increased. By providing such a functional substrate 100 on the front surface of the display, an increase in the width and thickness of the second microprojection 105 increases the blocking amount of the external light 165. Therefore, the external light 165 on the surface of the display is increased. The display size is reduced and the display quality of the display is improved.

  Further, a method in which the base layer 108 and the second microprojection 105 can use different materials to individually adjust the transmittance, for example, the second microprojection 105 formed by another mold is attached to another substrate. Once the transfer is performed, and then the second microprojection 105 is adhered to the surface of the base layer 108, the second microprojection 105 is manufactured as a separate molding. Even if the rate is 100%, the material of the second microprojection 105 can be selected as a material that does not transmit light. That is, the transmittance of the second microprojection 105 can be set to 0%. Since the second microprojection 105 having a transmittance of 0% can completely block the external light 165, the size of the reflected light 166 in FIG. When such a functional substrate 100 is provided on the front surface of the display, the size of the external light hitting the surface of the display becomes 0, so that the display quality is remarkably improved.

In the description of FIG. 8A, a structure using the first microprojection 103 is used. However, even in a structure without the first microprojection 103 as shown in FIG. The effect of will not change.
FIG. 10 is a diagram in which the first microprojection group 104 of FIG. 2 is removed. As shown in FIG. 10, only the shapes of the non-flat layer 102 and the second microprojection 105 have the effect of preventing external light from being mirror-reflected and blocking external light.
The external light 140 incident on the surface of the non-flat layer 102 generates reflected light 141, 142, 143 corresponding to the shape of the surface of the non-flat layer 102 whose surface shape is not flat. As described above, since the reflected light is diffused and reflected in all directions by the effect of the shape of the non-flat layer 102, the specular reflection by the external light is alleviated. Further, when the external light 140 hits the second microprojection 105, the external light is blocked and does not reach the surface of the non-flat layer 102. Thereby, the diffuse reflection light from the non-flat layer 102 is also reduced.
As described above, the present invention greatly reduces the specular reflection due to the effects of the non-flat layer 102 and the second minute protrusion 105 formed on the surface of the transparent substrate 101, so that the antiglare effect is increased. By providing this functional substrate 100 on the surface of the display, the display image displayed on the display is greatly reduced in glare due to external light, and thus an image display without image quality deterioration can be obtained.
In addition, since the non-flat layer 102 and the second microprojection 105 on the surface of the transparent substrate 101 are manufactured by pressing, a low-cost functional substrate does not require dry etching or photolithography unlike a semiconductor process. 100 is effective.

(Embodiment 2)
The present embodiment will be described with reference to FIG.
In FIG. 11, a solid body 182 such as a light emitting diode is provided on the surface of an opaque substrate 181, and the opaque substrate 181 and the solid body 182 are formed so as to cover the non-flat layer 102. A first microprojection group 104 having a large number of first microprojections 103 and a second microprojection group 106 having a large number of second microprojections 105 are provided on the non-planar surface of the layer 102. A functional substrate 180 is shown.
The opaque substrate 181 is a paper phenol substrate, a paper epoxy substrate, a glass composite substrate, a glass epoxy substrate, a Teflon (registered trademark) film (hereinafter referred to as a Teflon substrate).
It is composed of an alumina substrate and a composite substrate.
The material of the non-flat layer 102, the first microprojections 103, and the second microprojections 105 is an organic polymer such as PMMA. The molecular weight is approximately 18000 to 600,000. The opaque substrate 181 and the non-flat layer 102, and the light emitting diode 182 and the non-flat layer 102 are formed in close contact with each other.

The first microprojections 103 formed on the surface of the non-flat layer 102 are aligned in the vertical and horizontal directions, but may be randomly formed, and each has the same shape or a similar shape. Also good. Further, the height and thickness may be constant or random. The second microprojections 105 are aligned in the horizontal direction, but may be aligned in the vertical and horizontal directions.
Usually, the non-flat layer 102, the first microprojection group 104, and the second microprojection group 106 are integrally formed to obtain the functional substrate 180. However, the non-flat layer 102 provided on the transparent substrate 181 and the first microprojection group 106 are integrated with each other. Using a first mold having a shape opposite to the shape formed by combining the first microprojection group 104 having a large number of microprojections 103, a thermoplastic resin, a thermosetting resin, a photocurable resin, or the like A second substrate having a shape opposite to the shape of the second microprojection group 106 in which a large number of second microprojections 105 exist is applied to the first substrate obtained by pressing the resin layer. The functional substrate 180 is formed by transferring the second micro-projection group 106 obtained by being pressed against a resin layer made of a plastic resin, a thermosetting resin, a photo-curing resin, or the like, and firmly fixing it with an adhesive or the like. Minutes to make Formed may be.

The non-flat layer 102 preferably has a waviness period sufficiently larger than the wavelength of visible light for the purpose of preventing glare of outside light, and the height difference of waviness is also sufficiently larger than the wavelength of visible light.
The first microprojection 103 preferably has a diameter and height greater than ¼ of the wavelength of visible light for the purpose of suppressing reflection of external light.
The height and width of the second microprojection 105 are higher than the height of the non-flat layer 102 or the height of the first microprojection 103 for the purpose of blocking external light, and the width is 1 of the wavelength of visible light. Is preferably greater than / 4.
Since the first microprojection 103 and the second microprojection 105 are formed integrally with the non-flat layer 102, they are difficult to peel off. Further, since the first microprojection 103 and the second microprojection 105 are made of the same organic polymer as the material of the non-flat layer 102, the first microprojection 103 and the second microprojection 105 are formed in a strong state and have a structure that is difficult to peel off. As described above, the functional substrate 180 can provide a function of preventing reflection of external light, anti-glare of external light, and blocking of external light.

Usually, since the surface of the opaque substrate 181 on which the solid body 182 is not mounted has a blackish color, reflection due to external light is suppressed, but the solid body 182 has a whitish surface such as a light emitting diode. Reflection of outside light becomes stronger. Therefore, in a display using a large number of light emitting diodes, display quality is impaired due to reflection of external light and glare due to the surface of the light emitter being whitish.
In the functional substrate 180 of the present invention, the first microprojection group 104 in which a large number of the first microprojections 103 are present on the surface of the whitish light-emitting body and the first microprojection 103 on the non-planar surface, and the second microprojections. Since the second microprojection group 106 in which a large number of objects 105 exist is provided, in a display constituted by a plurality of light emitting diodes, reflection from the surface of the solid body 182 and glare also have an effect of blocking external light, which is greatly increased. Therefore, the display quality is greatly improved.
Further, in the functional substrate 180 of the present invention, even if the surface of the opaque substrate 181 is a color other than the blackish color, the non-flat layer 102 is formed on the surface of the opaque substrate 181 and the first microprojection 103 is formed on the non-flat surface. Are provided, and the second microprojection group 106 having a large number of second microprojections 105 is provided, so that reflection and glare from the surface of the opaque substrate 181 are not present. Since there is a light blocking effect and can be significantly reduced, display quality is greatly improved.

  In FIG. 12, a solid body 182 such as a light emitting diode is provided on the surface of an opaque substrate 181, and the non-flat layer 102 is formed so as to cover only the solid body 182. A functional substrate 180 provided with a first microprojection group 104 in which a large number of first microprojections 103 are present on a non-planar surface and a second microprojection 105 is shown. 11 differs from FIG. 12 in that the non-flat layer 102 covers the opaque substrate 181 and the solid body 182 or only the solid body 182. In FIG. Since the non-flat layer 102, the first micro-projection group 104 in which a large number of the first micro-projections 103 exist on the non-flat surface, and the second micro-projections 105 are provided, the structure is composed of a plurality of light emitting diodes. In the display that is used, the reflection and glare from the surface of the solid body 182 can be significantly reduced due to the effect of blocking external light, so that the display quality is greatly improved.

(Embodiment 3)
The present embodiment will be described with reference to FIG.
FIG. 13 shows a first microprojection in which an opaque substrate 181 and a solid body 182 such as a light emitting diode are covered with a base layer 108, and a large number of first microprojections 103 exist on the surface of the flat base layer 108. This shows a functional substrate 180 provided with a group 104 and a second microprojection group 106 in which many second microprojections 105 exist. The opaque substrate 181 includes a paper phenol substrate, a paper epoxy substrate, a glass composite substrate, a glass epoxy substrate, a Teflon substrate, an alumina substrate, and a composite substrate.
The material of the base layer 108, the first microprojection group 104, and the second microprojection group 106 is an organic polymer such as PMMA. The molecular weight is approximately 18000 to 600,000. The opaque substrate 181 made of the same organic polymer as the base layer 108 is formed in close contact with the base layer 108.
The first microprojections 103 formed on the surface of the base layer 108 are aligned in the vertical and horizontal directions, but may be formed randomly, or each may have the same shape or a similar shape. good. Further, the height and thickness may be constant or random. The second microprojections 105 are aligned in the horizontal direction, but may be aligned in the vertical and horizontal directions.

Usually, the base layer 108, the first microprojection group 104, and the second microprojection group 106 are integrally formed. However, the base layer 108 and the first microprojection provided on the transparent substrate 181 are used. A resin layer made of a thermoplastic resin, a thermosetting resin, a photocurable resin, or the like using a first mold having a shape opposite to the shape formed by combining the first microprojection group 104 having a large number of 103. A second mold having a shape opposite to the shape of the second microprojection group 106 in which a large number of second microprojections 105 exist is formed on the first substrate obtained by pressing on the thermoplastic resin, heat The second fine projection group 106 obtained by being pressed against a resin layer made of a curable resin or a photocurable resin is transferred, and is firmly fixed with an adhesive or the like to produce an integrated functional substrate. It can be divided into .
The thickness of the base layer 108 needs to be greater than the height of the solid body 182 in order to facilitate the formation of the first microprojection group 104 and the second microprojection group 106.
The first microprojection 103 preferably has a diameter and height greater than ¼ of the wavelength of visible light for the purpose of suppressing reflection of external light.
The height and width of the second microprojection 105 are preferably higher than the height of the first microprojection 103 for the purpose of blocking outside light, and the width is preferably greater than ¼ of the wavelength of visible light.

Since the first microprojections 103 and the second microprojections 105 are formed integrally with the base layer 108, they are difficult to peel off. Further, since the first microprojections 103 and the second microprojections 105 are made of the same organic polymer as the material of the base layer 108, they are molded in a strong state and have a structure that is difficult to peel off. As described above, the functional substrate 180 can provide an external light reflection preventing function and an external light blocking function.
Usually, since the surface of the opaque substrate 181 on which the solid body 182 is not mounted has a blackish color, reflection due to external light is suppressed, but the solid body 182 has a whitish surface such as a light emitting diode. Reflection of outside light becomes stronger. Therefore, in a display using a large number of light emitting diodes, the display quality is impaired by reflection of external light due to the surface of the light emitter being whitish.

In the functional substrate 180 of the present invention, the first microprojection group 104 in which many first microprojections 103 exist on the surface of the whitish light-emitting body and the second microprojection in which many second microprojections 105 exist. Since the projection group 106 is provided, in the display composed of a plurality of light emitting diodes, reflection from the surface of the solid body 182 can be greatly reduced due to the blocking effect of external light, so that the display quality is greatly improved. Will do.
In the functional substrate 180 of the present invention, the first microprojection group 104 in which a large number of the first microprojections 103 exist on the surface of the opaque substrate 181 even if the surface of the opaque substrate 181 is a color other than the blackish color. In addition, since the second microprojection group 106 having a large number of second microprojections 105 is provided, reflection from the surface of the opaque substrate 181 can be significantly reduced due to the effect of blocking external light. Therefore, the display quality is greatly improved.
In FIG. 14, only the solid body 182 such as a light emitting diode is covered with the base layer 108, and the first microprojection group 104 in which a large number of the first microprojections 103 exist on the surface of the flat base layer 108. The functional board | substrate 180 in which the 2nd microprojection 105 was provided is shown. 13 and FIG. 14 is that the base layer 108 covers the opaque substrate 181 and the solid body 182 or only the solid body 182. In FIG. Since the first microprojection group 104 and the second microprojection 105 having a large number of one microprojection 103 are provided, the display composed of a plurality of light emitting diodes reflects from the surface of the solid body 182. Since there is an external light blocking effect and can be significantly reduced, the display quality is greatly improved.

(Embodiment 4)
The present embodiment will be described with reference to FIG.
In FIG. 15, a solid body 182 such as a light emitting diode is provided on the surface of an opaque substrate 181, and the opaque substrate 181 and the solid body 182 are formed so as to cover the non-flat layer 102. This shows a functional substrate 180 provided with a second microprojection group 106 in which a large number of second microprojections 105 exist on the non-planar surface of the layer 102.
The opaque substrate 181 includes a paper phenol substrate, a paper epoxy substrate, a glass composite substrate, a glass epoxy substrate, a Teflon substrate, an alumina substrate, and a composite substrate.

The material of the non-flat layer 102 and the second microprojection 105 is an organic polymer such as PMMA. The molecular weight is approximately 18000 to 600,000. The opaque substrate 181 and the non-flat layer 102, and the light emitting diode 182 and the non-flat layer 102 are formed in close contact with each other.
The second microprojections 105 formed on the surface of the non-flat layer 102 are aligned in the horizontal direction, but may be aligned in the vertical and horizontal directions.
Usually, the non-flat layer 102 and the second microprojection group 106 are integrally molded to obtain a functional substrate 180, but a first mold having a shape opposite to that of the non-flat layer 102 provided on the transparent substrate 181 is formed. And a second group of microprojections in which a large number of second microprojections 105 are present on a first substrate obtained by being pressed against a resin layer made of a thermoplastic resin, a thermosetting resin, a photocurable resin, or the like. Using a second mold having a shape opposite to the shape of 106, the second microprojection group 106 obtained by being pressed against a resin layer made of thermoplastic resin, thermosetting resin, photocurable resin, or the like is transferred. Then, the functional substrate 180 may be divided and formed so as to be firmly fixed with an adhesive or the like.
The non-flat layer 102 preferably has a waviness period sufficiently larger than the wavelength of visible light for the purpose of preventing glare of outside light, and the height difference of waviness is also sufficiently larger than the wavelength of visible light.

The height and width of the second microprojection 105 are preferably higher than the height of the non-flat layer 102 for the purpose of blocking outside light, and the width is preferably larger than ¼ of the wavelength of visible light.
Since the second microprojection 105 is formed integrally with the non-flat layer 102, it is difficult to peel off. Furthermore, since the second microprojections 105 are made of the same organic polymer as the material of the non-flat layer 102, the second microprojections 105 are formed in a mutually strong state and have a structure that does not easily peel off. As described above, the functional substrate 180 can provide an anti-glare function for external light and a function for blocking external light.
Usually, since the surface of the opaque substrate 181 on which the solid body 182 is not mounted has a blackish color, reflection due to external light is suppressed, but the solid body 182 has a whitish surface such as a light emitting diode. Reflection of outside light becomes stronger. Therefore, in a display using a large number of light emitting diodes, display quality is impaired due to reflection of external light and glare due to the surface of the light emitter being whitish.

Since the functional substrate 180 of the present invention is provided with the second microprojection group 106 in which many non-flat layers 102 and second microprojections 105 exist on the surface of the whitish light-emitting body, the functional substrate 180 includes a plurality of light-emitting diodes. In the display that is used, the glare from the surface of the solid body 182 can be significantly reduced due to the effect of blocking external light, so that the display quality is greatly improved.
Further, in the functional substrate 180 of the present invention, even if the surface of the opaque substrate 181 is a color other than the blackish color, the second surface in which many non-flat layers 102 and second microprojections 105 exist on the surface of the opaque substrate 181. Since the small protrusion group 106 is provided, the glare from the surface of the opaque substrate 181 can be greatly reduced due to the effect of blocking external light, so that the display quality is greatly improved.

  In FIG. 16, a solid body 182 such as a light emitting diode is provided on the surface of an opaque substrate 181, and only the solid body 182 is covered with a non-flat layer 102. This shows a functional substrate 180 in which a second microprojection 105 is provided on a non-flat surface. FIG. 15 differs from FIG. 16 in that the non-flat layer 102 covers the opaque substrate 181 and the solid body 182 or only the solid body 182. In FIG. Since the non-flat layer 102 and the second microprojection 105 are provided, in the display constituted by a plurality of light emitting diodes, the glare from the surface of the solid body 182 has a shielding effect of external light and is greatly reduced. Therefore, the display quality is greatly improved.

(Embodiment 5)
The present embodiment will be described with reference to FIG.
FIG. 17 shows a second microprojection in which an opaque substrate 181 and a solid body 182 such as a light emitting diode are covered with a base layer 108, and a large number of second microprojections 105 exist on the surface of the flat base layer 108. A functional substrate 180 provided with a group 106 is shown.
The opaque substrate 181 includes a paper phenol substrate, a paper epoxy substrate, a glass composite substrate, a glass epoxy substrate, a Teflon substrate, an alumina substrate, and a composite substrate.
The material of the base layer 108 and the second microprojection group 106 is an organic polymer such as PMMA. The molecular weight is approximately 18000 to 600,000. The opaque substrate 181 made of the same organic polymer as the base layer 108 is formed in close contact with the base layer 108.
The second microprojections 105 formed on the surface of the base layer 108 are aligned in the horizontal direction, but may be aligned in the vertical and horizontal directions.
Usually, the base layer 108 and the second microprojection group 106 are integrally molded to obtain the functional substrate 180. However, the base formed on the transparent substrate 181 from a thermoplastic resin, a thermosetting resin, a photocurable resin, or the like. Using a second mold having a shape opposite to the shape of the second microprojection group 106 in which many second microprojections 105 exist on the first substrate provided with the layer 108, thermoplastic resin, heat The functional substrate 180 is manufactured by transferring the second minute projection group 106 obtained by being pressed against a resin layer made of a curable resin or a photo-curable resin, and firmly fixing it with an adhesive or the like. It may be divided and formed.

The height and width of the second microprojection 105 are larger than ¼ of the wavelength of visible light for the purpose of blocking external light.
Since the second microprojection 105 is formed integrally with the base layer 108, it is difficult to peel off. Furthermore, since the second microprojections 105 are made of the same organic polymer as the material of the base layer 108, the second microprojections 105 are formed in a mutually strong state and have a structure that does not easily peel off. As described above, the functional substrate 180 can provide a function of blocking outside light.
Usually, since the surface of the opaque substrate 181 on which the solid body 182 is not mounted has a blackish color, reflection due to external light is suppressed, but the solid body 182 has a whitish surface such as a light emitting diode. Reflection of outside light becomes stronger. Therefore, in a display using a large number of light emitting diodes, the display quality is impaired by reflection of external light due to the surface of the light emitter being whitish.

In the functional substrate 180 of the present invention, the second microprojection group 106 in which a large number of the second microprojections 105 exist is provided on the surface of the whitish light-emitting body. Since reflection from the surface of the body 182 can be greatly reduced by the effect of blocking external light, display quality is greatly improved.
In the functional substrate 180 of the present invention, the second microprojection group 106 in which a large number of second microprojections 105 exist on the surface of the opaque substrate 181 even if the surface of the opaque substrate 181 is a color other than a blackish color. Since the reflection from the surface of the opaque substrate 181 can be significantly reduced by the effect of blocking external light, the display quality is greatly improved.

  FIG. 18 shows a functional substrate 180 in which only a solid body 182 such as a light-emitting diode is covered with a base layer 108, and a second microprojection 105 is provided on the surface of the flat base layer 108. It is. 17 and FIG. 18 is that the base layer 108 covers the opaque substrate 181 and the solid body 182, or only the solid body 182. In FIG. Since the two microprojections 105 are provided, a display composed of a plurality of light emitting diodes can be greatly reduced due to the effect of blocking external light from the surface of the solid body 182, so that the display quality is large. Will improve.

(Embodiment 6)
The present embodiment will be described with reference to FIG.
In FIG. 19, a solid body 182 such as a light emitting diode is provided on the surface of an opaque substrate 181, and only the solid body 182 is covered with the base layer 108, and the first microprojection 103 is formed on the surface of the base layer 108. A functional substrate 180 provided with a large number of first microprojection groups 104 is shown.

The opaque substrate 181 includes a paper phenol substrate, a paper epoxy substrate, a glass composite substrate, a glass epoxy substrate, a Teflon substrate, an alumina substrate, and a composite substrate. The material of the base layer 108 and the first microprojection 103 is an organic polymer such as PMMA. The molecular weight is approximately 18000 to 600,000. The opaque substrate 181 and the base layer 108, and the solid body 182 and the base layer 108 are formed in close contact with each other.
The first microprojections 103 formed on the surface of the base layer 108 are aligned in the vertical and horizontal directions, but may be randomly formed, and each has the same shape or a similar shape. Also good. Further, the height and thickness may be constant or random.
The first microprojection 103 preferably has a diameter and height greater than ¼ of the wavelength of visible light for the purpose of suppressing reflection of external light.

Thus, the functional substrate 180 can provide an external light antireflection function.
Usually, since the surface of the opaque substrate 181 on which the solid body 182 is not mounted has a blackish color, reflection due to external light is suppressed, but the solid body 182 has a whitish surface such as a light emitting diode. Reflection of outside light becomes stronger. Therefore, in a display using a large number of light emitting diodes, display quality is impaired due to reflection of external light and glare due to the surface of the light emitter being whitish.
In the functional substrate 180 of the present invention, the first microprojection group 104 having a large number of the first microprojections 103 is provided on the surface of the whitish light-emitting body. Since reflection from the surface of the body 182 can be greatly reduced, the display quality is greatly improved.

1 is a perspective view of a functional board created in Example 1. FIG. FIG. 1 is a cross-sectional view of the functional substrate created in Example 1 in FIG. The elements on larger scale of the 1st microprotrusion group created in Example 1. FIG. The elements on larger scale of the 1st microprotrusion group created in Example 1. FIG. The figure which shows the manufacturing method of the functional board | substrate of FIG. The figure explaining the principle of reflection prevention. Sectional drawing of the 1st microprojection group and the 2nd microprojection group which were created in Example 1. FIG. The figure explaining the effect of the 2nd minute projection group created in Example 1. FIG. Sectional drawing of the 2nd microprotrusion group created in Example 1. FIG. Sectional drawing of the non-flat layer created in Example 1, and a 2nd microprotrusion group. Sectional drawing of the functional board | substrate created in Example 2. FIG. Sectional drawing of the functional board | substrate created in Example 2. FIG. Sectional drawing of the 1st microprojection group and the 2nd microprojection group which were created in Example 3. FIG. Sectional drawing of the 1st microprojection group and the 2nd microprojection group which were created in Example 3. FIG. Sectional drawing of the non-flat layer created in Example 4, and the 2nd microprotrusion group. Sectional drawing of the non-flat layer created in Example 4, and the 2nd microprotrusion group. Sectional drawing of the 2nd microprotrusion group created in Example 5. FIG. Sectional drawing of the 2nd microprotrusion group created in Example 5. FIG. Sectional drawing of the 1st microprotrusion group created in Example 6. FIG.

Explanation of symbols

100 and 180 are functional substrates, 101 is a transparent substrate, 102 is a non-flat layer, 103 is a first microprojection, 104 is a first microprojection group, 105 is a second microprojection, and 106 is a second microprojection. , 108 is a base layer, 120 is a mold, 121 is a resin layer, 122 is a support, 181 is an opaque substrate, and 182 is a solid body.

Claims (2)

A functional substrate provided on the front surface of the display, wherein a non-flat layer having a nonuniform surface shape is provided on a transparent substrate, and a first surface comprising a plurality of first microprojections is formed on the surface of the non-flat layer. A microprojection group and a second microprojection group including a plurality of second microprojections having a cross-sectional shape different from that of the first microprojection, and the height of the first microprojection is 100 nm or more. And the height of the second microprojection is 1 μm or more, the height of the second microprojection is higher than the height of the first microprojection, and external light is emitted from the first microprojection. A functional substrate that attenuates each time it passes through the second microprojections until it reaches a group of microprojections . A functional substrate provided on a front surface of a display , wherein a base layer having a flat surface is provided on a transparent substrate, and a first microprojection group including a plurality of first microprojections is formed on the surface of the base layer; , the second minute projection group is provided in which the cross-sectional shape composed of the plurality of second micro-protrusions that different from the first micro-protrusions, the height of the first micro-protrusions is at 100nm or more, The height of the second microprojection is 1 μm or more, the height of the second microprojection is higher than the height of the first microprojection, and external light is emitted from the first microprojection. A functional substrate that attenuates each time it passes through the second microprojections until reaching a group .