JP6206063B2 - Touch panel sensor and display device with touch panel - Google Patents

Description

  The present invention relates to a touch panel sensor capable of preventing the appearance of a transparent electrode layer and a display device with a touch panel using the same.

  Today, touch panels are widely used as input means. In many cases, a touch panel is used together with a display device as an input means for various devices in which a display device such as a liquid crystal display or a plasma display is incorporated (for example, a ticket vending machine, an ATM device, a mobile phone, a game machine). Yes. In such a device, the touch panel is placed on the display surface of the display device, which allows the touch panel to make a very direct input to the display device.

  For example, in a projected capacitive touch panel sensor, a transparent base material and a transparent pattern formed on the surface of the transparent base material using a transparent conductive material such as indium tin oxide (ITO). A configuration having a sensor portion having an electrode layer is suitably used. However, in the touch panel sensor having the above-described configuration, when the touch panel sensor is observed from the operation surface side of the touch panel sensor, a phenomenon in which the transparent electrode layer is seen in plan view and the bone appearance of the transparent electrode layer is a problem. It has become.

  For example, in Patent Document 1, a touch panel is formed by laminating a layer having a refractive index different from the refractive index of a transparent substrate, such as a high refractive index layer or a low refractive index layer, on the transparent substrate. In the sensor, it has been proposed to prevent the above-described bone appearance of the transparent electrode layer by reducing the difference in refractive index between the region where the transparent electrode layer is formed and the region where the transparent electrode layer is not formed. Yes. However, even when the above-described method is used, there is a problem that it is difficult to sufficiently prevent the above-described transparent electrode layer from being visible.

JP 2013-161448 A

As a result of intensive studies in view of the above circumstances, the present inventors have found that the difference in the transmission spectrum in the visible light region between the transparent substrate and the transparent electrode layer affects the bone appearance of the transparent electrode layer. . The present invention is based on the above findings.
The main object of the present invention is to provide a touch panel sensor capable of preventing the transparent electrode layer of the sensor portion from being seen and a display device with a touch panel using the touch panel sensor.

  The present invention includes a transparent base material, a sensor unit having a transparent electrode layer formed in a pattern on one surface of the transparent base material, and a binder resin formed on the transparent base material side of the transparent electrode layer. And a color adjusting layer that contains a color material and invisible the transparent electrode layer.

  ADVANTAGE OF THE INVENTION According to this invention, it can be set as the touchscreen sensor which can prevent the bone appearance of a transparent electrode layer by having a color adjustment layer.

In the said invention, it is preferable that the transmittance | permeability of the said color adjustment layer satisfy | fills the following relational expression.
α-β> γ-δ (relational formula)
(In the above relational expression, α is an average transmittance over a wavelength range of 400 nm to 500 nm of the transparent substrate, and β is an average over a wavelength range of 400 nm to 500 nm when the transparent substrate and the transparent electrode layer are laminated. Transmittance, γ is an average transmittance over a wavelength range of 400 nm or more and 500 nm or less when the transparent substrate and the color adjustment layer are stacked, and δ is a stack of the transparent substrate, the color adjustment layer, and the transparent electrode layer. The average transmittance over the wavelength range of 400 nm or more and 500 nm or less.)
This is because the appearance of the transparent electrode layer can be more suitably prevented.

  In the said invention, it is preferable that the said color adjustment layer is formed between the said transparent base material and the said transparent electrode layer. This is because the difference in refractive index between the transparent base material and the transparent electrode layer can be reduced by using the color adjustment layer, and thus the bone appearance of the transparent electrode layer can be more suitably prevented.

  The present invention is a display device with a touch panel having a display panel and a touch panel sensor disposed on a display surface of the display panel, wherein the touch panel sensor is a transparent substrate and one surface of the transparent substrate. A sensor unit having a transparent electrode layer formed in a pattern on the top, and a color adjustment that is formed on the transparent base material side of the transparent electrode layer and contains a binder resin and a coloring material to make the transparent electrode layer invisible A display device with a touch panel, wherein the surface on which the transparent electrode layer of the touch panel sensor is formed and the display surface of the display panel are arranged to face each other.

  According to the present invention, since the transparent electrode layer can be prevented from being seen by having the above-described touch panel sensor, a display device with a touch panel having a good appearance can be obtained.

In the said invention, it is preferable that the said display panel is an organic electroluminescent panel. In the following description, “organic electroluminescence” may be referred to as “organic EL” in some cases.
Here, in the conventional organic EL panel, for example, a circularly polarizing plate is disposed on the display surface in order to prevent external light reflection. However, the light emitted from the organic EL panel to the outside of the organic EL panel can be prevented. About 50% or more is absorbed by the circularly polarizing plate, and there is a problem that it is difficult to display with good luminance. On the other hand, in the present invention, the color adjustment layer in the touch panel sensor described above can prevent external light reflection and display with good luminance.

  The touch panel sensor of the present invention has an operational effect that the transparent electrode layer can be prevented from being seen.

It is a schematic plan view which shows an example of the touch panel sensor of this invention. It is AA sectional view taken on the line of the touch-panel sensor shown in FIG. It is a BB sectional view of the touch panel sensor shown in FIG. It is CC sectional view taken on the line of the touch-panel sensor shown in FIG. It is a schematic sectional drawing which shows an example of the display apparatus with a touchscreen of this invention. It is a schematic sectional drawing which shows the other example of the touchscreen sensor of this invention. It is a schematic plan view which shows the other example of the touchscreen sensor of this invention. It is the sectional view on the AA line of the touch panel sensor shown in FIG. FIG. 8 is a cross-sectional view taken along the line BB of the touch panel sensor illustrated in FIG. 7. It is CC sectional view taken on the line of the touch-panel sensor shown in FIG. It is a schematic sectional drawing which shows the other example of the touchscreen sensor of this invention. It is a schematic sectional drawing which shows the other example of the touchscreen sensor of this invention. It is a schematic sectional drawing which shows the other example of the touchscreen sensor of this invention. It is a schematic sectional drawing which shows the other example of the conventional touch panel sensor. It is a graph which shows the transmission spectrum of an Example and a comparative example. It is explanatory drawing explaining the difference of the transmission spectrum of an Example and a comparative example.

  Hereinafter, the touch panel sensor and the display device with a touch panel according to the present invention will be described.

A. Touch Panel Sensor The touch panel sensor of the present invention has a transparent base material, a sensor unit having a transparent electrode layer formed in a pattern on one surface of the transparent base material, and a transparent base material side of the transparent electrode layer. A color adjusting layer that is formed and contains a binder resin and a colorant and invisible the transparent electrode layer.
“The color adjustment layer makes the transparent electrode layer invisible” will be described later.

The touch panel sensor of the present invention will be described with reference to the drawings. 1 is a schematic plan view showing an example of the touch panel sensor of the present invention, FIG. 2 is a cross-sectional view taken along line AA in FIG. 1, FIG. 3 is a cross-sectional view taken along line BB in FIG. FIG. 2 is a cross-sectional view taken along line CC in FIG. 1.
As shown in FIGS. 1 to 4, the touch panel sensor 1 of the present invention includes a transparent substrate 2 and a sensor unit 3 having a transparent electrode layer 10 formed in a pattern on one surface of the transparent substrate 2. The color adjusting layer 4 is formed on the transparent base material 2 side of the transparent electrode layer 10 and contains a binder resin and a color material and makes the transparent electrode layer invisible. 1 to 4 show an example in which the color adjustment layer 4 is formed between the transparent substrate 2 and the transparent electrode layer 10. The sensor unit 3 is formed in the operation area T where the touch panel operator performs a touch operation in the touch panel sensor 1. The touch panel sensor 1 of the present invention is formed on the surface of the transparent substrate 2 on which the transparent electrode layer 10 is formed, and the wiring layer 5 connected to the transparent electrode layer 10 and the external connection connected to the wiring layer 5. A terminal 6 is provided. The wiring layer 5 and the external connection terminal 6 are formed in the non-operation area F located outside the operation area T in the touch panel sensor 1. Moreover, it is preferable that the decoration layer 7 is formed in the non-operation area F of the touch panel sensor 1. 2 and 3 show an example in which a decoration layer 7 is formed between the color adjustment layer 4 and the wiring layer 5.

The sensor unit 3 shown in FIGS. 1 to 4 is configured to connect a sensor electrode having a first electrode 31a and a second electrode 31b that are insulated from each other on the same surface of the transparent substrate 2, and the first electrode 31a. It has a conductive part having a second conductive part 32b connecting the first conductive part 32a and the second electrode 31b, and an interlayer insulating layer 33 formed between the first conductive part 32a and the second conductive part 32b. is there. The first conductive portion 32 a and the second conductive portion 32 b are formed so that a part thereof overlaps with the interlayer insulating layer 33 in plan view. The sensor unit 3 shown in FIGS. 1 to 4 has a configuration corresponding to a projected capacitive touch panel sensor. Further, the first electrode 31 a, the second electrode 31 b, and the second conductive portion 32 b are formed of the transparent electrode layer 10.
In FIG. 1, the interlayer insulating layer and the color adjustment layer are omitted for ease of explanation.

FIG. 5 is a schematic sectional view showing an example of a display device with a touch panel using the touch panel sensor of the present invention. In the display device 100 with a touch panel, the surface on which the transparent electrode layer 10 of the touch panel sensor 1 is formed and the display surface of the display panel 20 are arranged to face each other. Moreover, when the touch panel sensor 1 of the present invention is used in the display device with a touch panel 100, the surface 10 opposite to the surface on which the transparent electrode layer 10 is formed is disposed so as to face the touch panel operator side. It is used. In this specification, the “surface opposite to the surface on which the transparent electrode layer is formed” may be referred to as an operation surface.
FIG. 5 shows an example in which the display panel 20 is an organic EL panel 201. The organic EL device 201 includes a transparent substrate 21, a transparent electrode layer 22 formed on the transparent substrate 21, an organic EL layer 23 formed on the transparent electrode layer 22 and including at least a light emitting layer, and an organic EL layer 23. The back electrode layer 24 is formed on the back electrode layer 24, and the sealing substrate 25 is disposed on the back electrode layer 24. In the organic EL device 201 shown in FIG. 5, the transparent base material 21 side is used as the display surface.

  ADVANTAGE OF THE INVENTION According to this invention, it can be set as the touchscreen sensor which can prevent the bone appearance of a transparent electrode layer by having a color adjustment layer.

As a result of intensive studies in view of the above circumstances, the present inventors have found that the difference in the transmission spectrum in the visible light region between the transparent substrate and the transparent electrode layer affects the bone appearance of the transparent electrode layer. Based on the above findings, the present invention has been completed.
Here, the reason why the transparent electrode layer can be prevented from being seen in the present invention is not necessarily clear, but is considered as follows.
The transparent base material and the transparent electrode layer used for a general touch panel sensor have transparency that does not hinder the visual recognition from the operation surface of the operator of the display device with a touch panel in which the touch panel sensor is used. In general, they have transmission spectra in different visible light regions. Therefore, in the conventional touch panel sensor 1 ′ shown in FIG. 14, visible light is formed between a portion where the transparent electrode layer 10 is formed and a portion where the transparent electrode layer 10 is not formed on the surface of the transparent substrate 2. There is a difference in the transmission spectrum in the region. In the conventional touch panel sensor, it is considered that a bone appearance of the transparent electrode layer occurs when the difference is visually recognized by a touch panel operator.
On the other hand, the present invention provides a transparent electrode layer on the surface of the transparent substrate by disposing the color adjustment layer on the transparent electrode side of the transparent electrode layer, that is, on the operation surface side of the transparent electrode layer in the touch panel sensor. It is possible to reduce the difference in the transmission spectrum in the visible light region depending on the presence or absence of. Therefore, it is considered that the difference can be made difficult to be visually recognized by the touch panel operator, and the bone appearance of the transparent electrode layer can be prevented.
FIG. 14 is a schematic cross-sectional view showing an example of a conventional touch panel sensor, which corresponds to the cross-sectional view taken along the line CC of FIG. 1, and reference numerals not described in FIG. 14 are the same as those described in FIG. The description here is omitted.

  Hereinafter, details of the touch panel sensor of the present invention will be described.

1. Color Adjustment Layer The color adjustment layer is formed closer to the transparent substrate than the transparent electrode layer, contains a binder resin and a color material, and makes the transparent electrode layer invisible.
In the present invention, “the color adjustment layer makes the transparent electrode layer invisible” means that the color adjustment layer is formed on the transparent substrate side of the transparent electrode layer, that is, on the operation surface side of the touch panel sensor with respect to the transparent electrode layer. By reducing the difference between the transmission spectrum in the visible light region of the transparent substrate and the transmission spectrum in the visible light region when the transparent substrate and the transparent electrode layer are laminated, the bone appearance of the transparent electrode layer is reduced. Say. Note that reducing the bone appearance of the transparent electrode layer means that the outer shape of the transparent electrode layer is less visible.
In the present invention, “the color adjustment layer makes the transparent electrode layer invisible” means more specifically, by adjusting the transmittance in the visible light region of the color adjustment layer, the visible light region of the transparent substrate. When the transparent substrate and the color adjustment layer are laminated rather than the transmission spectrum difference in the visible light region and the difference in the transmission spectrum in the visible light region when the transparent substrate and transparent electrode layer are laminated (difference in the transmission spectrum before forming the color adjustment layer) The transparent electrode by reducing the difference between the transmission spectrum in the visible light region and the transmission spectrum in the visible light region when the transparent substrate, color adjustment layer and transparent electrode layer are laminated (difference in the transmission spectrum after forming the color adjustment layer) This means reducing the bone appearance of the layer. In the present invention, by adjusting the transmittance in the wavelength range of 400 nm to 500 nm of the color adjustment layer, the transmission after the color adjustment layer is formed is more than the difference in the transmission spectrum before the color adjustment layer is formed in the wavelength range of 400 nm to 500 nm. It is preferable to reduce the difference in the spectrum to reduce the bone appearance of the transparent electrode layer.
The transmittance of the color adjustment layer will be described later.
In the present invention, the “visible light region” means a wavelength region of 400 nm to 775 nm.

The color adjustment layer is continuously formed at least in the operation area of the touch panel sensor. More specifically, the color adjustment layer is formed on one surface of the transparent substrate, and is continuously formed over a region where the transparent electrode layer is formed and a region where the transparent electrode layer is not formed. Moreover, the color adjustment layer may be formed only in the operation area | region in a touch panel sensor, and may be formed in the whole surface of a touch panel sensor.
The “operation area” refers to an area where the operator performs a touch operation in the touch panel sensor. The operation area is an area where the transparent electrode layer of the sensor unit is provided in a pattern.
The “non-operation area” refers to an area provided outside the operation area in the touch panel sensor.

Moreover, the color adjustment layer should just be formed in the transparent base material side of a transparent electrode layer, specifically, as shown in FIGS. 2-4, between the transparent base material 2 and the transparent electrode layer 10 is shown. The color adjustment layer 4 may be formed, or the color adjustment layer 4 may be formed on the surface of the transparent substrate 2 opposite to the surface on which the transparent electrode layer 10 is formed as shown in FIG. Although it is good, it is more preferable that the color adjustment layer 4 is formed between the transparent substrate 2 and the transparent electrode layer 10 as shown in FIGS.
As a result of diligent research, the inventors of the present invention, when a color adjustment layer is formed between the transparent base material and the transparent electrode layer, cause the refractive index difference between the transparent base material and the transparent electrode layer by the color adjustment layer. It was found that the transparent electrode layer can be further prevented from being visible.
That is, when a color adjustment layer is formed between the transparent substrate and the transparent electrode layer, the color adjustment layer has a function of making the transparent electrode layer invisible, and a refractive index difference between the transparent substrate and the transparent electrode layer. It is possible to provide a layer having two functions, ie, a function of reducing the size of the film. Thereby, the bone appearance of the transparent electrode layer can be further prevented.
In addition, since the color adjustment layer can have two functions, the number of layers used in the touch panel sensor can be reduced, so that productivity can be improved.
FIG. 6 is a schematic cross-sectional view showing another example of the touch panel sensor of the present invention, which corresponds to the cross-sectional view taken along the line AA in FIG. 1, and symbols not described in FIG. Since it can be made the same as that which was done, description here is abbreviate | omitted.

(1) Physical property of color adjusting layer The transmittance of the color adjusting layer in the present invention is not particularly limited as long as the transparent electrode layer can be invisible, but the transmittance of the color adjusting layer satisfies the following relational expression. It is preferable.
α-β> γ-δ (relational formula)
(In the above relational expression, α is an average transmittance over a wavelength range of 400 nm to 500 nm of the transparent substrate, and β is an average over a wavelength range of 400 nm to 500 nm when the transparent substrate and the transparent electrode layer are laminated. Transmittance, γ is an average transmittance over a wavelength range of 400 nm or more and 500 nm or less when the transparent substrate and the color adjustment layer are stacked, and δ is a stack of the transparent substrate, the color adjustment layer, and the transparent electrode layer. The average transmittance over the wavelength range of 400 nm or more and 500 nm or less.)
In transparent substrates and transparent electrode layers that are widely used for touch panel sensors, transmission spectrum differences are likely to occur in the above-described wavelength range, so that the bone appearance of the transparent electrode layer can be suitably prevented by satisfying the above relational expression. Because it can.

Here, the “average transmittance” is a value obtained by averaging the transmittance over a predetermined visible light region having the above-described configuration. Specifically, it can be obtained by measuring a transmission spectrum using a microspectroscope OSP-SP2000 manufactured by OLYMPUS Co., Ltd. and averaging the obtained transmission spectrum.
Further, when the transmittance of the transparent substrate is a reference (100%), with respect to β, γ, and δ, the predetermined values for the transparent electrode layer, the color adjustment layer, and the laminate of the transparent electrode layer and the color adjustment layer, respectively It can be obtained as an average transmittance in the visible light region.

In the present invention, by using the color adjustment layer, the average transmittance over the entire visible light region can be lowered, and the reflection of external light can be lowered.
In the present invention, the average transmittance of the color adjusting layer over the entire visible light region is in the range of 50% to 98%, particularly in the range of 60% to 90%, particularly in the range of 60% to 80%. It is preferable to be within.
This is because in the display device with a touch panel using the touch panel sensor of the present invention, information displayed on the display surface can be observed well.
Further, when the touch panel sensor of the present invention is used together with an organic EL panel, it is possible to prevent external light reflection and display with good luminance.
Here, in the organic EL panel, the external light that has entered the organic EL panel from the display surface is reflected by the metal electrode layer of the organic EL panel, and is emitted to the outside of the organic EL panel again (hereinafter referred to as external light). There is a case where it is referred to as reflection), and there is a problem that the visibility of information displayed on the display surface is lowered. Conventionally, a method of preventing reflection of external light by arranging a circularly polarizing plate on the display surface has been used. In this case, the light emitted from the light emitting layer of the organic EL panel to the outside of the organic EL panel is reduced. Since 50% or more is absorbed by the circularly polarizing plate, there is a problem that it is difficult to display with good luminance.
In the present invention, since the touch panel sensor has the above-described color adjustment layer, external light can be absorbed by passing through the color adjustment layer twice, so that external light reflection can be suppressed. In addition, by controlling the average transmittance over the entire visible light region of the color adjustment layer within the above-described range, it is possible to suppress a decrease in luminance due to light from the light emitting layer of the organic EL panel passing once through the color adjustment layer. can do. Therefore, display can be performed with better luminance than in the case where a circularly polarizing plate is provided.

  The transmittance of the color adjustment layer can be adjusted by, for example, the type of binder resin and color material used in the color adjustment layer, the pigment content, the thickness of the color adjustment layer, and the like.

In the present invention, when the color adjustment layer is formed between the transparent substrate and the transparent electrode layer, the refractive index of the color adjustment layer is higher than the refractive index of the transparent substrate, and the refractive index of the transparent electrode layer. Is preferably lower. This is because the transparent electrode layer can be made more invisible.
The refractive index of the color adjustment layer can be adjusted by, for example, the type of binder resin, the content of the color material, and the like.

(2) Material of Color Adjustment Layer, etc. The color adjustment layer contains at least a binder resin and a color material. The binder resin has a role of holding the color material in the color adjustment layer, and also has a role of fixing the color adjustment layer to the transparent substrate.
The binder resin used for the color adjustment layer may be, for example, a photosensitive resin or a curable resin.

  Examples of the photosensitive resin include a photosensitive resin having a photoreactive group such as an acrylic resin, an epoxy resin, a polyimide resin, a polyvinyl cinnamate resin, and a reactive vinyl group such as a cyclized rubber. More than seeds can be used. In the said acrylic resin, the photosensitive resin which consists of alkali-soluble resin, a polyfunctional acrylate monomer, a photoinitiator, another additive etc. can be used as a resin component of binder resin, for example.

As the alkali-soluble resin, one or more kinds of methacrylic acid ester copolymers such as benzyl methacrylate-methacrylic acid copolymer, cardo resins such as epoxy acrylate having a bisphenolfluorene structure, and the like can be used.
Examples of the polyfunctional acrylate monomer include trimethylolpropane tri (meth) acrylate, pentaerythritol tetra (meth) acrylate, dipentaerythritol penta (meth) acrylate, dipentaerythritol hexa (meth) acrylate, and the like. The above can be used.
In the present invention, (meth) acrylate means either methacrylate or acrylate.

  As the photopolymerization initiator, one or more alkylphenone series, oxime ester series, triazine series, titanate series and the like can be used. For example, in the alkylphenone series, 2-methyl-1 [4- (methylthio) phenyl] -2-morpholinopropan-1-one (Irgacure (registered trademark) 907, manufactured by BASF Japan Ltd.), 2-benzyl- In 2-dimethylamino-1- (4-monofoliophenyl) butanone-1 (Irgacure (registered trademark) 369, manufactured by BASF Japan Ltd.), an oxime ester system, 1,2-octanedione, 1- [4- ( Phenylthio)-, 2- (O-benzoyloxime)] (Irgacure (registered trademark) OXE01, manufactured by BASF Japan Ltd.) and the like can be used.

  As the thermosetting resin, for example, an acrylic resin, an epoxy resin, a polyester resin, a polyimide resin, or the like can be used.

The color material is not particularly limited as long as a predetermined transmittance can be imparted to the color adjustment layer. For example, a black color material, a red color material, a blue color material, a green color material, a yellow color material, a purple color Materials etc. can be mentioned. Especially in this invention, a black color material can be used suitably.
Examples of the black color material include carbon black and titanium black.
Moreover, about the color material of another color, a pigment may be sufficient and dye may be sufficient. Specifically, since a known pigment or dye can be used, description thereof is omitted here.

  The content of the pigment contained in the color adjustment layer is not particularly limited as long as it can provide a transmittance capable of making the transparent electrode layer invisible. Within the range of 1 part by mass to 10 parts by mass, in particular within the range of 0.5 part by mass to 5 parts by mass, particularly preferably within the range of 1 part by mass to 3 parts by mass.

  The color adjusting layer can contain various known additives such as a photosensitizer, a dispersant, a surfactant, a stabilizer, and a leveling agent in addition to the binder resin and the color material.

  The thickness of the color adjustment layer is appropriately selected according to the application of the touch panel sensor and is not particularly limited. For example, the thickness is in the range of 0.01 μm to 10 μm, in particular in the range of 0.1 μm to 5 μm, It is preferably in the range of 0 μm to 1.2 μm.

  The method for forming the color adjustment layer in the present invention is not particularly limited as long as the color adjustment layer can be formed with a predetermined thickness on one surface of the transparent substrate. For example, a method for forming a color adjustment layer by preparing a composition for a color adjustment layer containing the binder resin and the color material described above and applying the composition on a transparent substrate can be used.

2. Sensor part The sensor part used for this invention has the transparent electrode layer formed in pattern shape on one surface of the said transparent base material. The sensor unit is formed in the operation area. The form of the sensor unit can be appropriately selected according to the operation principle of the touch panel sensor of the present invention, and is not particularly limited. In the touch panel sensor of the present invention, for example, a projection capacitive method can be suitably used. Hereinafter, a case where the sensor unit is in a form corresponding to the projected capacitance method will be described as an example.

  Examples of the sensor unit used in the present invention include the forms shown in FIGS. 1 to 4, the forms shown in FIGS. 7 to 10, and the forms shown in FIGS. 11 to 13. It is not limited.

Here, the sensor unit 3 shown in FIGS. 7 to 10 will be described. In the sensor unit 3, the first electrode 31 a and the second electrode 31 b are formed on one side of the transparent substrate 2 via the interlayer insulating layer 33. In this case, as shown in FIGS. 8 and 9, the first electrode 31 a and the first conductive portion 32 a, and the second electrode 31 b and the second conductive portion 32 b can be the transparent conductive layer 10.
7 is a schematic plan view showing another example of the touch panel sensor of the present invention, FIG. 8 is a cross-sectional view taken along line AA in FIG. 7, and FIG. 9 is a cross-sectional view taken along line BB in FIG. FIG. 10 is a cross-sectional view taken along the line CC of FIG. In FIG. 7, the interlayer insulating layer and the color adjustment layer are omitted for ease of explanation.

Moreover, the sensor part 3 shown in FIGS. 11-13 is demonstrated. In the sensor part 3, the first electrode 31 a and the first conductive part 32 a are formed on the insulating base material 34, and the second electrode 31 b and the second conductive part 32 b are formed on the transparent base material 2. As shown in FIGS. 11 and 12, the first electrode 31 a and the first conductive portion 32 a, and the second electrode 31 b and the second conductive portion 32 b can be the transparent conductive layer 10.
11 corresponds to a sectional view taken along line AA in FIG. 7, FIG. 12 corresponds to a sectional view taken along line BB in FIG. 7, and FIG. 13 corresponds to a sectional view taken along line CC in FIG.

(1) Transparent electrode layer Specific examples of the transparent conductive material used for the transparent electrode layer include indium tin oxide (ITO), zinc oxide, indium oxide, antimony-added tin oxide, fluorine-added tin oxide, and aluminum added. Zinc oxide, potassium-added zinc oxide, silicon-added zinc oxide, zinc oxide-tin oxide, indium oxide-tin oxide, zinc oxide-indium oxide-magnesium oxide, and other metal oxides A composite material of two or more types can be given.

The thickness of the transparent electrode layer is not particularly limited as long as the desired conductivity can be exhibited, but it is within the range of 10 nm to 300 nm, particularly within the range of 20 nm to 200 nm, and particularly within the range of 30 nm to 150 nm. preferable.
This is because if the thickness of the transparent electrode layer is small, the electrical resistance may be increased, and if the thickness of the transparent electrode layer is large, cracks or the like may be easily generated.

  The average transmittance over the entire visible light region of the transparent electrode layer is not particularly limited as long as it does not prevent the operator of the display device with a touch panel using the touch panel sensor of the present invention from visually recognizing the display. The average transmittance over the entire visible light region of the transparent electrode layer can be determined by measuring by the same method as the above-described method for measuring the average transmittance of the color adjustment layer.

  The refractive index of the transparent electrode layer is appropriately determined depending on the transparent conductive material. Usually, the refractive index of a transparent electrode layer becomes higher than the refractive index of a transparent base material.

  The transparent electrode layer is formed in a pattern on one surface on the transparent substrate. Examples of such a transparent electrode layer include a sensor electrode and a conductive part in a sensor part to be described later.

(2) Configuration of Sensor Unit The sensor unit used in the present invention usually has at least a sensor electrode and a conductive unit. Hereinafter, the configuration used for the sensor unit will be described.

(A) Sensor electrode The sensor part has a sensor electrode having a first electrode and a second electrode formed on one surface of the transparent substrate and insulated from each other. The sensor electrode is formed in the operation area and is used for detecting the contact position.
Note that that the first electrode and the second electrode are insulated from each other means that the electrodes are not electrically connected.

  As the sensor electrode, the above-described transparent electrode layer is usually used.

As the planar view shape and the planar view outer shape of the sensor electrode, JP 2011-210176 A, JP 2010-238052 A, JP 4610416 A, JP 2010-286886 A, and JP 2004-192093 A. It can be the same as that of a sensor electrode in a general touch panel sensor as disclosed in Japanese Patent Laid-Open No. 2010-277392, Japanese Patent Laid-Open No. 2011-129501, and the like.
More specifically, the outer shape of the sensor electrode in plan view includes a polygonal shape such as a substantially square shape in plan view. Moreover, as a planar view shape of a sensor electrode, it is preferable that it is a continuous planar shape.

  The first electrode and the second electrode are formed on the transparent base material as long as the first electrode and the second electrode are formed so as to be insulated from each other on one surface of the transparent base material in the operation region. It is not limited. For example, as shown in FIG. 4, the first electrode 31a and the second electrode 31b may be formed on one side of the transparent substrate 2 on the same plane, and as shown in FIG. The two electrodes 31b may be formed on one side of the transparent substrate 2 via the interlayer insulating layer 33, and as shown in FIG. 13, one of the first electrode 31a and the second electrode 31b (the second electrode in FIG. The electrode 31b) may be formed on the surface of the transparent substrate 2 on the wiring layer 4 side, and the other (the first electrode 31a in FIG. 13) may be formed on the insulating substrate 34.

  The thickness of the sensor electrode can be the same as that of a sensor electrode in a general touch panel sensor.

  A method for forming the sensor electrode is not particularly limited as long as it is a method capable of forming a high-definition sensor electrode, but a formation method using a photolithography method can be preferably used. Specifically, there is a method in which after forming a conductive layer containing the transparent conductive material, a resist layer is formed in a pattern on the conductive layer by photolithography, and then the conductive layer is etched using the resist layer as a mask. be able to. The etching solution is appropriately set according to the transparent conductive material and the like. Examples of the method for forming the conductive layer include dry processes such as vacuum deposition, sputtering, ion plating, and CVD.

(B) Conductive Part The touch panel sensor of the present invention has a conductive part having a first conductive part that connects the first electrodes and a second conductive part that connects the second electrodes. Usually, the first conductive portion and the second conductive portion are formed such that a part thereof overlaps in plan view.

The conductive material used for the conductive portion is not particularly limited as long as it has conductivity, and can be the same as the material used for the sensor electrode.
When at least one of the first conductive part and the second conductive part constituting the conductive part is the transparent conductive layer, a transparent electrode layer made of a transparent conductive material is used. In addition, a non-transparent conductive material can be used for the conductive portion, and specifically, a metal such as aluminum, molybdenum, silver, or chromium and an alloy thereof can be used.

  The shape of the conductive portion in plan view can be common to touch panel sensors and can be the same as the sensor electrode.

  Further, the external shape of the conductive portion in plan view can be general to the touch panel sensor, and examples thereof include a line shape having a width narrower than that of the sensor electrode in plan view. In the present invention, the conductive layer may be formed so that the outer shape of the sensor electrode and the conductive portion in plan view is a stripe shape.

  The first conductive portion and the second conductive portion are formed as the first conductive portion and the second conductive portion so that the first conductive portion and the second conductive portion can stably connect the first electrode and the second electrode, respectively, and are insulated from each other. If it is formed in, it will not specifically limit. For example, as shown in FIGS. 10 and 13, when the first electrode and the second electrode are formed on different planes or different members, the first conductive portion and the second conductive portion are respectively the first electrode and the second electrode. Are formed on the same plane. Also, as shown in FIG. 4, when the first electrode and the second electrode are formed on the same plane of the transparent substrate, the first conductive portion and the second conductive portion are formed via the interlayer insulating layer. .

  The thickness of the conductive part can be the same as the conductive part in a general touch panel sensor.

  The method for forming the conductive portion can be the same as the method for forming the sensor electrode described above, and a description thereof will be omitted here. Further, when the conductive portion is made of a non-transparent conductive material, it can be formed using an ink jet method.

(C) Interlayer insulation layer The sensor part used for this invention may have an interlayer insulation layer as needed. The interlayer insulating layer in the present invention is formed to prevent a short circuit between the first electrode and the second electrode or between the first conductive portion and the second conductive portion.

The insulating material used for the interlayer insulating layer is not particularly limited as long as it has a desired insulating property, and materials generally used for touch panel sensors can be used. For example, a light-transmitting acrylic resin, siloxane resin, and the like can be given, and among these, a photosensitive siloxane resin can be preferably used.
Moreover, when it has the insulating base material mentioned later, it can also form using an adhesive agent or an adhesive as an interlayer insulation layer. The adhesive or pressure-sensitive adhesive can be the same as that used for a general touch panel sensor.

  As a place where the interlayer insulating layer is formed, it may be common for a touch panel sensor. For example, as shown in FIG. 4, the first electrode 31a and the second electrode 31b are formed on the same plane of the transparent substrate 2. 2 and FIG. 3, the island type in which the interlayer insulating layer 33 is formed in an island shape only under the first conductive portion 32a, or although not shown, the interlayer insulating layer is the first layer. There is a hole type formed on the electrode, the second electrode, and the second conductive part, and having a contact hole for connecting the first conductive part and the first electrode. Also, for example, as shown in FIGS. 10 and 13, when the first electrode and the second electrode are formed on different planes or different members, interlayers as shown in FIGS. 8, 9, 11 and 12 are used. The insulating layer 33 may be formed between the first electrode 31a and the first conductive part 32a and the second electrode 31b and the second conductive part 32b.

  The thickness of the interlayer insulating layer is not particularly limited as long as it can prevent a short circuit between the first electrode and the second electrode or between the first conductive part and the second conductive part. Can be general. For example, the thickness of the interlayer insulating layer can be in the range of 0.5 μm to 3.0 μm.

  The method for forming the interlayer insulating layer is not particularly limited as long as the interlayer insulating layer can be accurately formed at a predetermined position, and examples thereof include a photolithography method and a printing method such as screen printing. . It is also possible to process a film, a sheet, or the like that exhibits insulating properties and appropriate optical transparency and optical isotropy, and is laminated as an interlayer insulating layer.

(D) Insulating base material In the sensor part used for this invention, you may form any one of a 1st electrode and a 1st electroconductive part or a 2nd electrode and a 2nd electroconductive part on an insulating base material.

  The insulating base material is not particularly limited as long as the material constituting the insulating base material has insulating properties. The insulating substrate usually has transparency. About transparency, it can be made to be the same as that of the transparent base material mentioned later.

  The insulating base material can be the same as a resin base material, a glass base material, and the like used for a transparent base material to be described later, and thus description thereof is omitted here.

3. Transparent base material The transparent base material used for this invention supports the sensor part and color adjustment layer which were mentioned above.

  The transparency of the transparent substrate is not particularly limited as long as it does not hinder the operator of the display device with a touch panel using the touch panel sensor of the present invention from seeing from the operation surface. For example, specifically, the light transmittance of the transparent substrate is preferably 80% or more, and more preferably 90% or more. In addition, let the light transmittance of a transparent base material be the value (total light) measured by the method prescribed | regulated by JISK7105.

Further, the refractive index of the transparent substrate is appropriately determined according to the material of the transparent substrate, but is usually about 1.0 to 2.0, and in particular 1.2 to 1.8. It is preferable that it is in the range of 1.4, and it is especially preferable that it exists in the range of 1.4-1.6.
The refractive indexes of the transparent substrate, color adjusting layer, and transparent electrode layer in the present invention can be measured using a spectroscopic ellipsometer. As the spectroscopic ellipsometer, for example, UVISEL manufactured by Joban Evon can be used. Moreover, the said refractive index is a refractive index in the light of wavelength 550nm.

  Examples of the material constituting the transparent substrate include inorganic materials such as glass, polyester resins such as polyethylene terephthalate, resin materials such as acrylic resins and polycarbonate. When an inorganic material such as glass is selected, it is possible to increase the strength of the touch panel sensor and widen the setting range of manufacturing conditions such as heating temperature. On the other hand, when a resin material is selected, the touch panel sensor can be reduced in weight, and flexibility can be imparted to the touch panel sensor.

The thickness of the transparent substrate is not particularly limited as long as it can support the sensor unit and the color adjustment layer, and is appropriately selected depending on the material. For example, when the transparent substrate is made of an inorganic material such as glass, it is preferably in the range of 0.3 mm to 1.5 mm. Moreover, when a transparent base material consists of resin materials, it is preferable that it is a film form which has flexibility, and it is preferable to specifically set it as the range of 50 micrometers-300 micrometers.
Further, the form of the transparent substrate may be a flexible film or a plate.

  The transparent substrate may be subjected to a surface treatment such as a primer treatment in order to improve the adhesion with the transparent electrode layer described above. Further, an undercoat layer made of an organic layer, a refractive index adjusting layer made of silicon oxide, niobium oxide, or the like may be formed.

  In this invention, as shown in FIG. 5, when the transparent base material 2 serves also as the front surface protection plate mentioned later, the front surface protection plate mentioned later can also be used as a transparent base material.

4). Other Configurations The touch panel sensor of the present invention only needs to have the above-described transparent base material, sensor unit, and color adjustment layer, and other configurations can be appropriately selected and added as necessary.

(1) Wiring layer In the touch panel sensor of this invention, it has the wiring layer normally formed on the surface in which the transparent electrode layer of the transparent base material was formed, and connected with the transparent electrode layer. In addition, the wiring layer is usually provided in a non-operation area outside the operation area in the touch panel sensor.

The wiring layer usually contains a metal material.
The metal material is not particularly limited as long as it has desired conductivity, and examples thereof include a metal simple substance, a metal composite, a metal and metal compound composite, and a metal alloy. . Specifically, as a simple metal, gold, silver, copper, aluminum, platinum, lead, indium, palladium, rhodium, ruthenium, iridium, osmium, tungsten, nickel, tantalum, bismuth, tin, zinc, titanium, cobalt, Illustrative examples include iron and molybdenum alone. As the metal composite, a three-layer structure of molybdenum, aluminum, and molybdenum called MAM can be given. Examples of the complex of metal and metal compound include chromium oxide and a chromium-forming body. Examples of the metal alloy include a silver alloy, a copper alloy, and an alloy of silver, palladium, and copper called APC. A metal material may be used independently and may be used in combination of 2 or more types.

The plan view shape of the wiring layer is not particularly limited as long as it can be connected to the transparent electrode layer and can be formed outside the operation region, and is the same as that used for a general touch panel sensor. The description here is omitted.
The line width of the wiring layer can be, for example, about 10 μm to 200 μm.

  The method for forming the wiring layer is not particularly limited as long as the method for forming the wiring layer is a method capable of forming a high-definition wiring layer. For example, first, a metal layer made of a metal material is used. After the formation, a method of forming a resist layer on the metal layer in a pattern and then etching the metal layer using the resist layer as a mask can be mentioned. The etching solution is appropriately set according to the metal material or the like. Specifically, when the metal layer is made of silver, APC, or the like, phosphorous nitric acid or the like can be used. Examples of the method for forming the metal layer include dry processes such as vacuum deposition, sputtering, ion plating, and CVD. In addition, as a method for forming the wiring layer, an inkjet method can also be used.

(2) External connection terminal The touch panel sensor of this invention has the external connection terminal connected to the said wiring layer. The external connection terminal is used for connection with a flexible printed wiring board or the like.

  The formation location of the external connection terminal and the material of the external connection terminal can be the same as those of the wiring layer.

  The terminal width and thickness of the external connection terminals, the shape in plan view, and the interval between the external connection terminals in the external connection terminal portion can be the same as those of a general touch panel sensor. Specifically, it can be the same as that described in JP2011-210176A.

(3) Protective layer The protective layer in this invention is formed so that the sensor part and wiring layer which were formed on the surface of a transparent base material may be covered. Moreover, it is preferable that the said protective layer is formed in the outermost surface at the side of the sensor part and wiring layer of a touchscreen sensor.
The protective layer is not particularly limited as long as it has insulating properties, but preferably has transparency. Examples of such a protective layer having insulation and transparency include those made of an organic material such as an acrylic resin or an inorganic material such as silicon oxide.

(4) Decorating layer The touch panel sensor of the present invention may have a decorating layer. The decorative layer is preferably formed in a frame shape in the non-operation area outside the operation area in the touch panel sensor. Moreover, the wiring etc. of a touch-panel sensor part can be concealed by a frame-shaped decoration layer, and design property can be improved. The decoration layer is also used for displaying marks such as characters, figures, symbols, and the like.

  The decorative layer may be formed in any position as long as the decorative layer can be formed closer to the operation surface than the wiring layer and the external connection terminal. For example, the decorative layer is formed between the transparent substrate and the wiring layer and the external connection terminal. A decoration layer may be formed, and a decoration layer may be formed on the surface opposite to the surface on which the wiring layer or the like of the transparent substrate is formed. In this case, the decorative layer may be formed directly on the surface of the transparent substrate, or the decorative layer may be formed on the front protective plate described later.

  Moreover, the decoration layer may have an opening part. For example, when the decorative layer is formed in a pattern and has an opening, the decorative layer and the wiring layer can be decorated by arranging the opening of the decorative layer on the wiring layer. Thereby, it is not necessary to form a decoration layer further under the opening part of a decoration layer, and the layer structure of the front plate for touch-panel protection of this invention can be simplified. Specifically, the opening of the decorative layer can be used to display a mark such as a character, a figure, or a symbol.

  Examples of the material for the decoration layer include a colored resin composition containing a binder resin and a coloring material. Moreover, a metal layer can also be used for a decoration layer.

  The method for forming the decorative layer is not particularly limited as long as it is a method capable of forming the decorative layer on the transparent substrate or the front protective plate. In the case of using the colored resin composition, for example, a printing method such as gravure printing or screen printing, an ink jet method, a photolithography method, or the like can be given. Moreover, in the case of a metal layer, a vacuum evaporation method, sputtering method, etc. are mentioned, for example.

  The thickness of the decoration layer is appropriately selected according to the purpose.

(5) Front protective plate The touch panel sensor of the present invention may have a front protective plate. The front protective plate is provided on the outermost surface on the operator side when the touch panel sensor is used in a display device with a touch panel.

The front protective plate is not particularly limited as long as it has mechanical strength capable of protecting these surfaces with respect to a display device with a touch panel using the touch panel sensor of the present invention, and typically a glass plate is used. Can be used. In particular, as the glass plate, chemically strengthened glass is preferable in that it has excellent mechanical strength compared to float glass and can be made thinner by that amount. Chemically tempered glass is typically glass whose mechanical properties have been reinforced by a chemical method by exchanging part of ionic species such as by replacing sodium with potassium in the vicinity of the surface of the glass.
It is also possible to use a resin for the front protective plate. For example, as the resin, acrylic resin, polycarbonate resin, cycloolefin resin, polyester resin, or the like can be used. By using a resin for the front protective plate, the weight can be reduced and flexibility can be provided.

  About the thickness of a front surface protection board, it can select suitably according to the use of the touch panel sensor of this invention.

5. Method for Manufacturing Touch Panel Sensor The method for manufacturing the touch panel sensor of the present invention is not particularly limited as long as the touch panel sensor having the above-described configuration can be manufactured, and may be a known method.

6). Applications The touch panel sensor of the present invention can be suitably used for a display device with a touch panel described in the section “B. Display device with touch panel” described later.

B. A display device with a touch panel The display device with a touch panel of the present invention includes a display panel and a touch panel sensor disposed on a display surface of the display panel, and the touch panel sensor includes a transparent base material and the transparent substrate. A sensor part having a transparent electrode layer formed in a pattern on one surface of a substrate, and formed on the transparent substrate side of the transparent electrode layer, contains a binder resin and a color material, and contains the transparent electrode layer A surface of the touch panel sensor on which the transparent electrode layer is formed and the display surface of the display panel are arranged to face each other. It is.
That is, the display device with a touch panel according to the present invention includes the touch panel sensor described above.

The display device with a touch panel of the present invention will be described with reference to the drawings.
FIG. 5 is a schematic cross-sectional view showing an example of a display device with a touch panel according to the present invention. The details of FIG. 5 are the same as the contents described in the section “A. Touch panel sensor” described above, and thus the description thereof is omitted here.

  According to the present invention, since the transparent electrode layer can be prevented from being seen by having the above-described touch panel sensor, a display device with a touch panel having a good appearance can be obtained.

  Hereinafter, the display device with a touch panel of the present invention will be described.

1. Touch Panel Sensor Since the touch panel sensor used in the present invention can be the same as the content described in the section “A. Touch Panel Sensor” described above, the description thereof is omitted here.

2. Display Panel The display panel used in the present invention is not particularly limited as long as a touch panel can be applied, and examples thereof include flat panel displays such as an organic EL panel, a liquid crystal panel, and electronic paper. Among these, organic EL panels, liquid crystal panels, and electronic paper are preferable because they can be thinned.
In the present invention, the display panel is particularly preferably an organic EL panel. This is because by disposing the touch panel sensor in the present invention on the display surface of the display panel, it is possible to prevent external light reflection and display with good luminance.

The organic EL panel can be the same as a general organic EL panel, for example, a transparent substrate, a transparent electrode layer formed on the transparent substrate, a transparent electrode layer, and at least a light emitting layer. Examples thereof include an organic EL layer containing, a back electrode layer formed on the organic EL layer, and a sealing substrate disposed on the back electrode layer. In addition, an insulating layer, a partition, a TFT, and the like may be formed on the organic EL panel. When the organic EL element is solid-sealed, a resin layer may be filled between the transparent substrate and the sealing substrate.
The transparent substrate, the transparent electrode layer, the organic EL layer, the back electrode layer, the sealing substrate, the insulating layer, the partition, the TFT, and the like can be the same as those used for a general organic EL panel.

The liquid crystal panel can be the same as a general liquid crystal panel, for example, a front substrate in which a color filter layer, a transparent electrode layer and an alignment film are sequentially formed on a transparent substrate, a back electrode layer on the substrate, An example in which a liquid crystal layer is disposed between a rear substrate on which an alignment film is sequentially formed can be given. Further, a TFT, a backlight, or the like may be formed on the liquid crystal panel.
The transparent substrate, color filter layer, transparent electrode layer, alignment film, back electrode layer, liquid crystal layer, TFT, backlight, and the like can be the same as those used for general liquid crystal panels.
The liquid crystal panel may be any of a transmissive liquid crystal panel, a reflective liquid crystal panel, a transflective liquid crystal panel, and the like.
In the case where the liquid crystal panel has a backlight, the thickness of the liquid crystal panel is preferably relatively thin as described above, and therefore, the thickness of the backlight is also preferably relatively thin. For example, a backlight using an organic EL element can be made thin.

The electronic paper can be the same as general electronic paper, for example, between a front substrate having a transparent electrode layer formed on a transparent substrate and a back substrate having a back electrode layer formed on the substrate. And the like in which a display medium layer is disposed.
The transparent substrate, the transparent electrode layer, the back electrode layer, the display medium layer, and the like can be the same as those used for general electronic paper.
As a display method of electronic paper, known ones can be applied, for example, electrophoresis method, twist ball method, powder movement method (electronic powder fluid method, charged toner type method), liquid crystal display method, thermal method. (Coloring method, light scattering method), electrochromic method, electrowetting method, magnetophoresis method and the like.

3. Display device with a touch panel The display device with a touch panel of the present invention is such that the surface of the touch panel sensor on which the transparent electrode layer is formed and the display surface of the display panel are arranged to face each other. An adhesive layer is usually disposed between the two.
As a material used for the adhesive layer, for example, an optical transparent adhesive called OCA can be used for the adhesive layer.

  The present invention is not limited to the above embodiment. The above-described embodiment is an exemplification, and the present invention has substantially the same configuration as the technical idea described in the claims of the present invention, and any device that exhibits the same function and effect is the present invention. It is included in the technical scope of the invention.

  Hereinafter, the details of the present invention will be described with reference to Examples and Comparative Examples.

[Example]
(Preparation of composition for color adjustment layer)
A color adjusting layer composition was prepared by the following procedure.
First, the curable resin composition A was prepared by the following procedure.
In a polymerization tank, 63 parts by mass of methyl methacrylate (MMA), 12 parts by mass of acrylic acid (AA), 6 parts by mass of 2-hydroxyethyl methacrylate (HEMA), and 88 parts by mass of diethylene glycol dimethyl ether (DMDG) are charged. After stirring and dissolving, 7 parts by mass of 2,2′-azobis (2-methylbutyronitrile) was added and dissolved uniformly.
Then, it stirred at 85 degreeC under nitrogen stream for 2 hours, and also was made to react at 100 degreeC for 1 hour.
Further, 7 parts by mass of glycidyl methacrylate (GMA), 0.4 parts by mass of triethylamine, and 0.2 parts by mass of hydroquinone were added to the obtained solution, and the mixture was stirred at 100 ° C. for 5 hours to obtain a copolymer resin solution ( A solid content of 50%) was obtained.

Next, the following materials were stirred and mixed at room temperature to obtain a curable resin composition A.
<Composition of curable resin composition A>
-Copolymer resin solution (solid content 50%) ... 16 parts by mass-Dipentaerythritol pentaacrylate (Sartomer SR399)
... 24 parts by mass · Ortho-cresol novolac type epoxy resin (Epico Shell Epoxy Epicoat 180S70) · 4 parts by mass · 2-methyl-1- (4-methylthiophenyl) -2-morpholinopropan-1-one
... 4 parts by mass, diethylene glycol dimethyl ether ... 52 parts by mass

Next, the following components were mixed and sufficiently dispersed with a sand mill to prepare a black pigment dispersion.
<Composition of black pigment dispersion>
Black pigment (Mitsubishi Chemical Corporation # 2600) 20 parts by mass Polymer dispersion (Bic Chemie Japan, Ltd. Disperbyk 111)
... 16 parts by mass, solvent (diethylene glycol dimethyl ether) ... 64 parts by mass

Next, a composition for a color adjusting layer was prepared by mixing the following components.
<Composition of composition for color adjustment layer>
-Black pigment dispersion liquid-10 parts by mass-Curable resin composition A-40 parts by mass-Diethylene glycol dimethyl ether-50 parts by mass

  The color adjustment layer composition was applied onto a glass substrate, dried at 100 ° C. for 3 minutes, and then baked at 170 ° C. for 15 minutes to form a color adjustment layer having a thickness of 1.1 μm. Sample 1 was obtained through the above steps.

  A transparent electrode layer was formed by depositing ITO on a glass substrate on which a color adjustment layer was formed in the same manner as in Sample 1 by using a sputtering method to a thickness of 0.14 μm. Sample 2 was obtained through the above steps.

[Comparative example]
A glass substrate similar to that in Example 1 was used as Sample 3.
A transparent electrode layer was formed on the same glass substrate as in Example 1 in the same manner as Sample 2 in Example 1. Sample 4 was obtained by the above process.

[Evaluation]
Using a microspectroscope OSP-SP2000 manufactured by OLYMPUS Co., Ltd., the transmission spectra of Samples 1 and 2 of Examples and Samples 3 and 4 of Comparative Examples were measured using the transmittance in the visible light region of the glass substrate as a reference. did. The results are shown in FIG.
Further, based on the obtained transmission spectrum, the difference between the transmission spectra of samples 1 and 2 and the difference between the transmission spectra of samples 3 and 4 were obtained. The results are shown in FIG.
As shown in FIG. 16, the difference in the transmission spectrum due to the presence or absence of the transparent electrode layer could be reduced by providing the color adjustment layer in the example as compared with the comparative example. More specifically, the difference in the transmission spectrum in the wavelength range of 400 nm to 500 nm could be reduced in the example compared to the comparative example.

The following visual evaluation was performed.
The transparent electrode layers in the sample 2 of the example and the sample 4 of the comparative example were etched into a predetermined pattern by photolithography. When the sample 2 and the sample 4 in which the transparent electrode layer was formed in a pattern were observed from the glass substrate side, the outer shape in plan view of the transparent electrode layer was not visually confirmed in the sample 2, but the sample 4 was transparent in the sample 4 The external shape of the electrode layer in plan view was confirmed visually.

DESCRIPTION OF SYMBOLS 1, 1 '... Touch-panel sensor 2 ... Transparent base material 3 ... Sensor part 4 ... Color adjustment layer 10 ... Transparent electrode layer 20 ... Display panel 100 ... Display apparatus with a touch panel 201 ... Organic EL panel

Claims (4)

A transparent substrate;
A sensor unit having a transparent electrode layer formed in a pattern on one surface of the transparent substrate;
A color adjustment layer that is formed on the transparent substrate side of the transparent electrode layer, contains a binder resin and a coloring material, and makes the transparent electrode layer invisible;
I have a,
A touch panel sensor, wherein the transmittance of the color adjustment layer satisfies the following relational expression .
α-β> γ-δ (relational formula)
(In the above relational expression, α is the average transmittance over the wavelength range of 400 nm to 500 nm of the transparent substrate, β is the average over the wavelength range of 400 nm to 500 nm when the transparent substrate and the transparent electrode layer are laminated) Transmittance, γ is the average transmittance over the wavelength range of 400 nm or more and 500 nm or less when the transparent base material and the color adjustment layer are laminated, and δ is the transparent base material, the color adjustment layer, and the transparent electrode layer laminated. The average transmittance over the wavelength range of 400 nm or more and 500 nm or less.) The touch panel sensor according to claim 1, wherein the color adjustment layer is formed between the transparent substrate and the transparent electrode layer. A display device with a touch panel having a display panel and a touch panel sensor disposed on a display surface of the display panel,
The touch panel sensor is formed on a transparent base material, a sensor portion having a transparent electrode layer formed in a pattern on one surface of the transparent base material, and on the transparent base material side of the transparent electrode layer, and a binder. A resin and a color material, and a color adjustment layer that makes the transparent electrode layer invisible,
A display device with a touch panel, wherein the surface of the touch panel sensor on which the transparent electrode layer is formed and the display surface of the display panel are arranged to face each other. The display device with a touch panel according to claim 3 , wherein the display panel is an organic electroluminescence panel.

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