JP2007310489A - Touch panel integrated information display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a touch panel integrated information display device which is improved in visibility by taking countermeasures against reflection where interface reflection is apt to occur in the touch panel integrated information display device. <P>SOLUTION: The touch panel integrated information display device 11 constituted by integrating a display device 12 which displays information and a touch panel 13 for inputting information to the display device 12 is improved in visibility by forming a double-layered antireflection coating 19 on the outermost surface of the touch panel 13. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a touch panel integrated information display device including a display device for displaying information and a touch panel for inputting information to the display device.

As a conventional example of a touch panel integrated information display device, for example, as shown in FIG. 8, there is one in which a display device 51 and a resistive touch panel 52 are integrally arranged. The resistive touch panel 52 includes an upper substrate 53 made of a film (for example, a polymer film), an upper transparent electrode 54 formed on the upper substrate 53, a lower transparent electrode 55 formed on a lower substrate (not shown), and an upper portion. It consists of a spacer 56 disposed between the transparent electrode 54 and the lower transparent electrode 55, a hard coat 57 and the like laminated on the upper substrate 54 (see, for example, Patent Document 1).
JP 2004-45518 A

  The resistive touch panel used in the above-described conventional touch panel integrated information display device has a large reflection at the electrode interface. Therefore, the touch panel integrated information display is configured by integrally stacking the resistive touch panel on the front surface of the display device. The apparatus needs to improve visibility because the reflection between the interfaces becomes large.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a touch panel integrated information display device with improved visibility by applying an antireflection measure to a portion where interface reflection is likely to occur in the touch panel integrated information display device.

  To achieve the above object, a touch panel integrated information display device according to claim 1 of the present invention is a touch panel integrated information in which a display device for displaying information and a touch panel for inputting information to the display device are integrally arranged. In the display device, an antireflection film is formed on the outermost surface of the touch panel.

  To achieve the above object, a touch panel integrated information display device according to claim 2 of the present invention is a touch panel integrated information in which a display device for displaying information and a touch panel for inputting information to the display device are integrally arranged. In the display device, the thickness of the transparent electrode on the display surface side of the display device is 40 nm.

  To achieve the above object, a touch panel integrated information display device according to claim 3 of the present invention is a touch panel integrated information in which a display device for displaying information and a touch panel for inputting information to the display device are integrally arranged. In the display device, a thin film having a refractive index of 1.45 to 1.65 and a film thickness of 20 to 150 nm is formed on the display surface side transparent electrode of the display device.

  To achieve the above object, a touch panel integrated information display device according to claim 4 of the present invention is a touch panel integrated information in which a display device for displaying information and a touch panel for inputting information to the display device are integrally arranged. A display device, wherein a titanium oxide film having a thickness of 40 to 100 nm is formed between a display surface side substrate and a display surface side transparent electrode of the display device.

  In the touch panel integrated information display device of the present invention, as the information display panel constituting the display device for displaying the information, at least one of the two transparent substrates facing each other has a charging property. A display medium in which colored particles are enclosed and the display medium is moved by an electric field generated in the substrate to display information such as an image can be suitably used.

  According to the touch panel integrated information display device of the first aspect of the present invention configured as described above, a touch panel integrated information display device in which a display device for displaying information and a touch panel for inputting information to the display device are integrally arranged. In this case, since an antireflection film is formed on the outermost surface of the touch panel, which is a portion where interface reflection is likely to occur, a reduction in contrast is effectively prevented. Accordingly, a touch panel integrated information display device with improved visibility can be provided.

  According to the touch panel integrated information display device of the second aspect of the present invention configured as described above, a touch panel integrated information display device in which a display device for displaying information and a touch panel for inputting information to the display device are integrally disposed. In the display device, the transparent electrode on the display surface side of the display device, which is a portion where interface reflection is likely to occur, is thinned to 40 nm or less, so that a reduction in contrast is effectively prevented. Accordingly, a touch panel integrated information display device with improved visibility can be provided.

  According to the touch panel integrated information display device of claim 3 of the present invention configured as described above, the touch panel integrated information display device in which the display device for displaying information and the touch panel for inputting information to the display device are integrally arranged. In contrast, since a thin film having a refractive index of 1.45 to 1.65 and a film thickness of 20 to 150 nm is formed on the display surface side transparent electrode of the display device, which is a portion where interface reflection is likely to occur, the contrast is lowered. Is effectively prevented. Accordingly, a touch panel integrated information display device with improved visibility can be provided.

  According to the touch panel integrated information display device of claim 4 of the present invention configured as described above, a touch panel integrated information display device in which a display device for displaying information and a touch panel for inputting information to the display device are integrally disposed. In this case, a titanium oxide film having a film thickness of 40 to 100 nm is formed between the display surface side substrate and the display surface side transparent electrode of the display device, which is a portion where interface reflection is likely to occur, so that a reduction in contrast is effective. Will be prevented. Accordingly, a touch panel integrated information display device with improved visibility can be provided.

  According to the touch panel integrated information display device of the fifth aspect of the present invention having the above-described configuration, reflected light that is particularly important in a display device that visually recognizes reflected light from a display medium, such as a charged particle driving display device. Since the loss can be suppressed, a decrease in contrast is effectively prevented. Accordingly, a touch panel integrated information display device with improved visibility can be provided.

  Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings.

FIG. 1 is a diagram showing an example of use of a touch panel integrated information display device of the present invention. The touch panel integrated information display device 11 of the present invention includes a display device 12 for displaying information and a touch panel 13 for inputting information, and the touch panel 13 is integrally disposed on the front surface of the display device 12.
As the display device 12, a display medium composed of colored particles for display having a charging property is sealed between two opposing substrates, at least one of which is transparent, and the display medium is moved by an electric field generated in the substrate. A passively or actively driven charged particle drive type display device that displays information such as images can be used, but is not limited thereto. As the touch panel 13, a light-transmitting one having a position detection function and a writing input function can be used. For example, a resistive film type touch panel can be used. For the detailed configuration of this resistive film type touch panel, refer to, for example, Japanese Patent Application Laid-Open No. 2003-34860.

  Next, an example of the configuration of a charged particle driving type information display panel used for a display device in the touch panel integrated information display device of the present invention will be described. In this charged particle drive type information display panel, a two-color display medium composed of two colored display particles each having different charging characteristics is partitioned by a partition between at least one transparent substrate. It has a structure enclosed in a plurality of cells. When an electric field is applied to the display medium enclosed between two substrates, the charged display medium is attracted by the electric field force or Coulomb force along the applied electric field direction, and the display medium changes in the electric field direction. Information is displayed by changing the moving direction by. Therefore, it is necessary to design the information display panel so that the display medium can move uniformly and maintain stability when the display information is rewritten or when the display information is continuously displayed. Here, as the force applied to the particles constituting the display medium, in addition to the force attracting each other by the Coulomb force between the particles, an electric mirror image force between the electrode and the substrate, an intermolecular force, a liquid cross-linking force, gravity and the like can be considered.

A principle configuration of an information display panel used for the display device in the touch panel integrated information display device of the present invention will be described with reference to FIGS.
In the example shown in FIG. 2A, the display medium 3 is composed of at least two or more kinds of display media 3 (here, white particles for display 3Wa) having different optical reflectivity and charging characteristics composed of at least one kind of particles. Generated by applying a voltage between an electrode 5 provided on the substrate 1 and an electrode 6 provided on the substrate 2. Depending on the electric field to be moved, the substrate 1 and 2 are moved vertically to make the black display medium 3B visually recognized by the observer, or the white display medium 3W is visually recognized by the observer. It is carried out. In the example shown in FIG. 2A, a partition 4 is provided between the substrates 1 and 2 in a lattice shape, for example, to form a cell. In addition, in FIG. 2A, the front partition is omitted. The electrode may be provided outside the substrate or may be provided so as to be embedded inside the substrate.
In the example shown in FIG. 2B, one type of display medium 3 having optical reflectivity and chargeability composed of at least one type of particles (here, white display consisting of a group of white particles 3Wa for display). The medium 3W) is moved in a direction parallel to the substrates 1 and 2 in accordance with an electric field generated by applying a voltage between the electrode 5 provided on the substrate 1 and the electrode 6 provided on the substrate 2. The white display medium 3W is visually recognized by the observer to display white, or the color of the electrode 6 or the substrate 1 is visually recognized by the observer to display the color of the electrode 6 or the substrate 1. In the example shown in FIG. 2B, for example, a grid-like partition wall 4 is provided between the substrates 1 and 2 to form a cell. Further, in FIG. 2 (b), the front partition is omitted. The electrode of the substrate may be provided outside the substrate or may be embedded in the substrate.

  Next, various configuration examples of the touch panel integrated information display device of the present invention will be described with reference to FIGS.

  The touch panel integrated information display device shown in FIG. 3 has anti-reflection measures on the touch panel side. That is, the touch panel 13 in the touch panel integrated information display apparatus of FIG. 3 is configured as a resistive film type touch panel, and includes an upper substrate 14 made of a film (for example, a polymer film) and an upper transparent formed on the upper substrate 14. The electrode 15, a lower transparent electrode 16 formed on a lower substrate (not shown) (also used as the display surface side transparent substrate of the display device 12), and a spacer (between the upper transparent electrode 15 and the lower transparent electrode 16) For example, a dot spacer 17, a hard coat 18 laminated on the upper substrate 14, one or more antireflection films 19 laminated on the hard coat 18, and the like. Examples of the antireflection film 19 include a thin film 19a having a refractive index of 1.7 and a thickness of 80 nm laminated on the hard coat 18, and a refractive index of 1.4 and a thickness of 90 nm laminated on the thin film 19a. It is assumed that an antireflection film having a two-layer structure including the thin film 19b is used.

  According to the touch panel integrated information display device of the present invention shown in FIG. 3, in the touch panel integrated information display device in which the display device 12 and the touch panel 13 are integrally disposed, the outermost surface of the touch panel 13 that is a portion where interface reflection is likely to occur. Since the antireflection film 19 having a two-layer structure is formed, the white reflectance is improved, and the decrease in contrast is effectively prevented. Therefore, the touch panel integrated information display device with improved visibility is obtained.

  The touch panel integrated information display device according to the present invention shown in FIG. 4 has an anti-reflection measure on the display device side. That is, the display device 12 in the touch panel integrated information display device of FIG. 4 is configured as a charged particle drive type information display panel, and is formed on a substrate 2 (for example, a glass substrate) which is a display surface side transparent substrate. As the display surface side transparent electrode 6, one having a thinner film thickness (for example, a film thickness of 40 nm or less) than the conventional transparent electrode is used.

  According to the touch panel integrated information display device of the present invention shown in FIG. 4, in the touch panel integrated information display device in which the display device 12 and the touch panel 13 are integrally disposed, the display of the display device 12 that is a part where interface reflection is likely to occur. Since the surface-side transparent electrode has a thin film thickness of 40 nm or less, the white reflectance is improved and the reduction in contrast is effectively prevented. Therefore, the touch panel integrated information display device with improved visibility is obtained.

  The touch panel integrated information display device of the present invention shown in FIG. 5 has an anti-reflection measure on the display device side. That is, the display device 12 in the touch panel integrated information display device of FIG. 5 is configured as a charged particle drive type information display panel, and is formed on a substrate (for example, a glass substrate) 2 that is a display surface side transparent substrate. A thin film (for example, an organic film) 20 having a refractive index of 1.45 to 1.65 and a thickness of 20 to 150 nm is laminated on the display surface side transparent electrode 6.

  According to the touch panel integrated information display device of the present invention shown in FIG. 5, in the touch panel integrated information display device in which the display device 12 and the touch panel 13 are integrally disposed, the display of the display device 12 that is a part where interface reflection is likely to occur. Since the thin film 20 having a refractive index of 1.45 to 1.65 and a film thickness of 20 to 150 nm is formed on the surface-side transparent electrode, the white reflectance is improved and the reduction in contrast is effectively prevented. It will be. Therefore, the touch panel integrated information display device with improved visibility is obtained.

  The touch panel integrated information display device of the present invention shown in FIG. 6 has an anti-reflection measure on the display device side. That is, the display device 12 in the touch panel integrated information display device of FIG. 6 is configured as a charged particle driving type information display panel, and includes a substrate (for example, a glass substrate) 2 that is a display surface side transparent substrate and a display surface side. A titanium oxide film 21 having a film thickness of 40 to 100 nm is formed between the transparent electrodes 6.

  According to the touch panel integrated information display device of the present invention shown in FIG. 6, in the touch panel integrated information display device in which the display device 12 and the touch panel 13 are integrally disposed, the display of the display device 12 that is a part where interface reflection is likely to occur. Since the titanium oxide film 21 having a film thickness of 40 to 100 nm is formed between the substrate 2 which is the surface side transparent substrate and the display surface side transparent electrode 6, the white reflectance is improved and the contrast is effectively reduced. Will be prevented. Therefore, the touch panel integrated information display device with improved visibility is obtained.

  Note that two or more antireflection measures shown in FIGS. 3 to 6 can be combined, and in that case, a synergistic effect regarding antireflection can be obtained.

  Hereinafter, each member which comprises the panel for information displays used for a display apparatus by the touchscreen integrated information display apparatus of this invention, for example is demonstrated.

  As for the substrate, the display surface side substrate is a transparent substrate on which the color of the display medium can be confirmed from the outside of the panel, and a material having high visible light transmittance and good heat resistance is preferable. The back substrate may be transparent or opaque. Examples of the substrate include inorganic substrates such as glass and ceramics, polyethylene terephthalate (PET), polyethylene terephthalate (PEN), polyethylene (PE), polycarbonate (PC), polyimide (PI), and polyethersulfone (PES). Organic polymer substrates such as acrylic can be used. The thickness of the substrate is preferably from 2 to 5000 μm, more preferably from 5 to 2000 μm. If it is too thin, it will be difficult to maintain the strength and the spacing uniformity between the substrates, and if it is thicker than 5000 μm, it will be a thin information display panel. Is inconvenient.

  As an electrode forming material of an electrode provided on a substrate, metals such as aluminum, silver, nickel, copper, and gold, indium tin oxide (ITO), indium oxide, conductive tin oxide, antimony tin oxide (ATO), conductive Examples include conductive metal oxides such as zinc oxide, and conductive polymers such as polyaniline, polypyrrole, and polythiophene, which are appropriately selected and used. The electrode can be formed by patterning the above-described materials into a thin film by sputtering, vacuum deposition, CVD (chemical vapor deposition), coating, or the like, or by mixing a conductive agent with a solvent or synthetic resin binder. A method of applying and patterning is used. The electrode provided on the viewing side (display surface side) substrate needs to be transparent, but the electrode provided on the back side substrate does not need to be transparent. In any case, the above-mentioned material that is conductive and capable of pattern formation can be suitably used. Note that the electrode thickness is not particularly limited as long as the conductivity can be secured and the light transmittance is not hindered, and is preferably 3 to 1000 nm, preferably 5 to 400 nm. The material and thickness of the electrode provided on the back side substrate are the same as those of the electrode provided on the display surface side substrate described above, but need not be transparent. In this case, the external voltage input may be superimposed with direct current or alternating current.

The shape of the partition provided on the substrate is appropriately set according to the type of display medium involved in display, the shape and arrangement of the electrodes to be arranged, and is not generally limited. However, the width of the partition is 2 to 100 μm, preferably 3 The height of the partition wall is adjusted to 10 to 100 μm, preferably 10 to 50 μm.
In forming the partition wall, a both-rib method in which ribs are formed on each of the opposing substrates 1 and 2 and then bonded, and a single-rib method in which ribs are formed only on one substrate are conceivable. In the present invention, any method is preferably used.
As shown in FIG. 7, the cells formed by the partition walls made of these ribs are exemplified by a square shape, a triangular shape, a line shape, a circular shape, and a hexagonal shape as viewed from the substrate plane direction. And a mesh shape. It is better to make the portion corresponding to the cross section of the partition wall visible from the display surface side (the area of the cell frame) as small as possible, and the display state becomes clearer.
Examples of the method for forming the partition include a mold transfer method, a screen printing method, a sand blast method, a photolithography method, and an additive method. Any of these methods can be suitably used for an information display panel mounted as a display device on the information display device with a writing function of the present invention, and among these, a photolithography method using a resist film and a mold transfer method are suitable. Used for.

Next, display colored particles (hereinafter also referred to as particles) constituting the display medium in the information display panel used in the display device according to the present invention will be described. The colored particles for display are used as they are as a display medium by being composed of the colored particles for display as they are, or by being combined with other particles as a display medium.
The particles can contain a charge control agent, a colorant, an inorganic additive, and the like, if necessary, in the resin as the main component, as in the conventional case. Examples of resins, charge control agents, colorants, and other additives will be given below.

  Examples of the resin include urethane resin, urea resin, acrylic resin, polyester resin, acrylic urethane resin, acrylic urethane silicone resin, acrylic urethane fluororesin, acrylic fluororesin, silicone resin, acrylic silicone resin, epoxy resin, polystyrene resin, styrene Acrylic resin, polyolefin resin, butyral resin, vinylidene chloride resin, melamine resin, phenol resin, fluororesin, polycarbonate resin, polysulfone resin, polyether resin, polyamide resin and the like can be mentioned, and two or more kinds can be mixed. In particular, acrylic urethane resin, acrylic silicone resin, acrylic fluororesin, acrylic urethane silicone resin, acrylic urethane fluororesin, fluororesin, and silicone resin are suitable from the viewpoint of controlling the adhesive force with the substrate.

  The charge control agent is not particularly limited. Examples of the negative charge control agent include salicylic acid metal complexes, metal-containing azo dyes, metal-containing oil-soluble dyes (including metal ions and metal atoms), and quaternary ammonium salt systems. Examples thereof include compounds, calixarene compounds, boron-containing compounds (benzyl acid boron complexes), and nitroimidazole derivatives. Examples of the positive charge control agent include nigrosine dyes, triphenylmethane compounds, quaternary ammonium salt compounds, polyamine resins, imidazole derivatives, and the like. In addition, metal oxides such as ultrafine silica, ultrafine titanium oxide, ultrafine alumina, nitrogen-containing cyclic compounds such as pyridine and derivatives and salts thereof, various organic pigments, resins containing fluorine, chlorine, nitrogen, etc. are also charged. It can also be used as a control agent.

  As the colorant, various organic or inorganic pigments and dyes as exemplified below can be used.

Examples of the black colorant include carbon black, copper oxide, manganese dioxide, aniline black, activated carbon and the like.
Examples of blue colorants include C.I. I. Pigment blue 15: 3, C.I. I. Pigment Blue 15, Bituminous Blue, Cobalt Blue, Alkaline Blue Lake, Victoria Blue Lake, Phthalocyanine Blue, Metal-free Phthalocyanine Blue, Phthalocyanine Blue Partial Chlorides, Fast Sky Blue, Indanthrene Blue BC, and the like.
Examples of red colorants include bengara, cadmium red, red lead, mercury sulfide, cadmium, permanent red 4R, risor red, pyrazolone red, watching red, calcium salt, lake red D, brilliant carmine 6B, eosin lake, rhodamine lake B, Alizarin Lake, Brilliant Carmine 3B, C.I. I. Pigment Red 2 etc.

Yellow colorants include chrome yellow, zinc yellow, cadmium yellow, yellow iron oxide, mineral first yellow, nickel titanium yellow, navel yellow, naphthol yellow S, Hansa Yellow G, Hansa Yellow 10G, Benzidine Yellow G, Benzidine Yellow GR, Quinoline Yellow Lake, Permanent Yellow NCG, Tartrazine Lake, C.I. I. Pigment Yellow 12 etc.
Examples of green colorants include chrome green, chromium oxide, pigment green B, C.I. I. Pigment Green 7, Malachite Green Lake, Final Yellow Green G, etc.
Examples of the orange colorant include red chrome yellow, molybdenum orange, permanent orange GTR, pyrazolone orange, Vulcan orange, indanthrene brilliant orange RK, benzidine orange G, indanthrene brilliant orange GK, C.I. I. Pigment Orange 31 etc.
Examples of purple colorants include manganese purple, first violet B, and methyl violet lake.
Examples of white colorants include zinc white, titanium oxide, antimony white, and zinc sulfide.

  Examples of extender pigments include barite powder, barium carbonate, clay, silica, white carbon, talc, and alumina white. Examples of various dyes such as basic, acidic, disperse, and direct dyes include nigrosine, methylene blue, rose bengal, quinoline yellow, and ultramarine blue.

Examples of inorganic additives include titanium oxide, zinc white, zinc sulfide, antimony oxide, calcium carbonate, lead white, talc, silica, calcium silicate, alumina white, cadmium yellow, cadmium red, cadmium orange, titanium yellow, Examples include bitumen, ultramarine blue, cobalt blue, cobalt green, cobalt violet, iron oxide, carbon black, manganese ferrite black, cobalt ferrite black, copper powder, and aluminum powder.
These pigments and inorganic additives can be used alone or in combination. In addition, white particles for display and black particles for display constituting the display medium used in the present invention can be produced by combining a plurality of the above-described additives. Among these, white pigments such as titanium oxide are preferably used for the display white particles, and black pigments such as carbon black are preferably used for the display black particles.
Colored particles for display having a desired color can be produced by blending the colorant.

  Further, the colored particles for display (hereinafter, also referred to as particles) used in the present invention have an average particle diameter d (0.5) in the range of 1 to 20 μm and are preferably uniform. If the average particle diameter d (0.5) is larger than this range, the display is not clear. If the average particle diameter d (0.5) is smaller than this range, the cohesive force between the particles becomes too large, which hinders movement as a display medium.

Furthermore, in the present invention, regarding the particle size distribution of each particle, the particle size distribution Span represented by the following formula is less than 5, preferably less than 3.
Span = (d (0.9) −d (0.1)) / d (0.5)
(However, d (0.5) is a numerical value expressing the particle diameter in μm that 50% of the particles are larger than this and 50% is smaller than this, and d (0.1) is a particle in which the ratio of the smaller particles is 10%. (Numerical value expressed in μm, and d (0.9) is a numerical value expressed in μm for a particle diameter of 90% or less.)
By keeping Span within a range of 5 or less, the size of each particle is uniform, and movement as a uniform display medium becomes possible.

  Furthermore, regarding the correlation between the particles, the ratio of the d (0.5) of the particles having the minimum diameter to the d (0.5) of the particles having the maximum diameter among the used particles is set to 50 or less, preferably 10 or less. It is essential. Even if the particle size distribution Span is reduced, particles with different charging characteristics move in opposite directions, so that the particle size is close to each other and each particle can be easily moved in the opposite direction by the equivalent amount. This is within this range.

The particle size distribution and the particle size can be obtained from a laser diffraction / scattering method or the like. When laser light is irradiated onto particles to be measured, a light intensity distribution pattern of diffracted / scattered light is spatially generated, and this light intensity pattern has a corresponding relationship with the particle diameter, so that the particle diameter and particle diameter distribution can be measured. .
Here, the particle size and particle size distribution in the present invention are obtained from a volume-based distribution. Specifically, using a Mastersizer2000 (Malvern Instruments Ltd.) measuring instrument, put particles into a nitrogen stream and use the attached analysis software (software based on volume-based distribution using Mie theory). The diameter and particle size distribution can be measured.

In addition, when applying a display medium composed of colored particles for display to a dry information display panel that is driven in the air, it is important to manage the gas in the void surrounding the display medium between the substrates. Contributes to improved stability. Specifically, it is important that the relative humidity at 25 ° C. is 60% RH or less, and preferably 50% RH or less for the humidity of the gas in the gap.
2A and 2B and FIGS. 3 to 6, the gap portions are electrodes 5 and 6 (when the electrodes are provided on the inner side of the substrate) from the portion sandwiched between the opposing substrates 1 and 2. ), A gas portion in contact with a so-called display medium excluding an occupied portion of the display medium 3, an occupied portion of the partition wall 4, and a seal portion of the information display panel.
The gas in the gap is not limited as long as it is in the humidity region described above, but dry air, dry nitrogen, dry argon, dry helium, dry carbon dioxide, dry methane, and the like are preferable. This gas needs to be sealed in an information display panel so that the humidity is maintained, for example, filling a display medium, assembling an information display panel in a predetermined humidity environment, It is important to apply a sealing material and a sealing method that prevent moisture from entering from the outside.

In the information display panel used in the display device of the present invention, the distance between the substrates is not limited as long as the display medium can be moved and the contrast can be maintained.
The volume occupation ratio of the display medium in the space between the opposing substrates is preferably 5 to 70%, more preferably 5 to 60%. When it exceeds 70%, the movement as a display medium is hindered, and when it is less than 5%, the contrast tends to be unclear.
The information display panel used in the present invention is not limited to the above, and an information display panel of a liquid crystal method, an electrophoresis method, a rotating ball method, or the like can be used.

  EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples and comparative examples of the present invention, but the present invention is not limited to the following examples. In the examples and comparative examples, a touch panel integrated information display device having a configuration in which a resistive film type touch panel is integrally disposed on the front surface of the charged particle drive type display device 12 is used.

<Comparative Example 1>
A touch panel integrated information display device (for example, the antireflection film 19 is removed from the configuration of FIG. 3) without antireflection measures was produced. In this touch panel integrated information display device, the white reflectance when the white solid image was displayed was 16.3%. Note that the larger the value of the white reflectance, the easier it is to see.

<Example 1>
3, a thin film 19a having a refractive index of 1.7 and a film thickness of 80 nm is formed on the hard coat 18 of the touch panel 13, and a thin film 19b having a refractive index of 1.4 and a film thickness of 90 nm stacked on the thin film 19a. The antireflection film 19 having a layer structure was laminated to produce a touch panel integrated information display device. In this touch panel integrated information display device, when white solid image display was performed, the white reflectance was 18.9%, and it was confirmed that the visibility was improved.

<Example 2>
In FIG. 4, as the display surface side transparent electrode 6 formed on the display surface side substrate 2 of the display device 12, a thin film having a thickness of 20 nm was used to produce a touch panel integrated information display device. In this touch panel integrated information display device, when white solid image display was performed, the white reflectance was 24.3%, and it was confirmed that the visibility was improved.

<Example 3>
In FIG. 4, as the display surface side transparent electrode 6 formed on the display surface side substrate 2 of the display device 12, a thin film having a thickness of 40 nm was used to produce a touch panel integrated information display device. In this touch panel integrated information display device, when white solid image display was performed, the white reflectance was 21.9%, and it was confirmed that the visibility was improved.

<Example 4>
In FIG. 5, a thin film 20 having a refractive index of 1.53 and a thickness of 90 nm is laminated on a display surface side transparent electrode 6 (film thickness of 70 nm) formed on the display surface side substrate 2 of the display device 12. An integrated information display device was produced. In this touch panel integrated information display device, the white reflectance when the white solid image was displayed was 26.4%, and it was confirmed that the visibility was remarkably improved.

<Example 5>
In FIG. 6, a titanium oxide film 21 having a film thickness of 60 nm is formed between the display surface side substrate 2 and the display surface side transparent electrode 6 (film thickness 70 nm) of the display device 12 to produce a touch panel integrated information display device. In this touch panel integrated information display device, the white reflectance when the white solid image was displayed was 24.9%, and it was confirmed that the visibility was remarkably improved.

<Example 6>
The display surface side transparent electrode 6 formed on the display surface side transparent substrate 2 of the display device 12 has a refractive index of 1 on the display device 12 having a thickness of 70 nm and the hard coat 18 of the touch panel 13. .7, a touch panel having a structure in which a thin film 19a having a thickness of 80 nm and a two-layer antireflection film 19 including a thin film 19b having a refractive index of 1.4 and a thickness of 90 nm stacked on the thin film 19a are stacked. A touch panel integrated information display device was produced. In this touch panel integrated information display device, the white reflectance when a white solid image was displayed was 19.0%, and an improvement in visibility was recognized.

<Example 7>
In FIG. 5, a thin film 20 having a refractive index of 1.53 and a thickness of 20 nm is laminated on a display surface side transparent electrode 6 (film thickness of 70 nm) formed on the display surface side substrate 2 of the display device 12, and the touch panel. An integrated information display device was produced. In this touch panel integrated information display device, the white reflectance when white solid image display was performed was 18.3%, and it was confirmed that the visibility was improved.

<Example 8>
In FIG. 5, a thin film 20 having a refractive index of 1.53 and a film thickness of 150 nm is laminated on a display surface side transparent electrode 6 (film thickness of 70 nm) formed on the display surface side substrate 2 of the display device 12, and the touch panel. An integrated information display device was produced. In this touch panel integrated information display device, the white reflectance when the white solid image was displayed was 21.2%, and it was confirmed that the visibility was improved.

<Example 9>
In FIG. 6, a 40 nm-thick titanium oxide film 21 was formed between the display surface side substrate 2 and the display surface side transparent electrode 6 (thickness 70 nm) of the display device 12 to produce a touch panel integrated information display device. In this touch panel integrated information display device, when white solid image display was performed, the white reflectance was 22.5%, and it was confirmed that the visibility was improved.

<Example 10>
In FIG. 6, a titanium oxide film 21 having a film thickness of 100 nm is formed between the display surface side substrate 2 and the display surface side transparent electrode 6 (film thickness 70 nm) of the display device 12 to produce a touch panel integrated information display device. In this touch panel integrated information display device, when white solid image display was performed, the white reflectance was 19.3%, and it was confirmed that the visibility was improved.

The touch panel integrated information display device of the present invention is an information display device capable of writing and displaying information on the information display screen through input via the touch panel, and information that can be displayed even when the written display information is turned off. As a display device, a notebook computer, an electronic notebook, a portable information device called PDA (Personal Digital Assistants), a display unit of a mobile device such as a mobile phone or a handy terminal, an electronic book such as an electronic book or an electronic newspaper, a signboard, a poster, Bulletin boards such as blackboards and whiteboards, display units for electronic desk calculators, home appliances, automotive products, card display units such as point cards and IC cards, electronic advertisements, information boards, electronic POPs (Point Of Presence, Point Of Purchase advertising) ), Electronic price tag, electronic shelf label, electronic score, display part of RF-ID equipment, POS terminal It is suitably used for display units of various electronic devices such as car navigation devices and watches.
The information display panel driving method according to the present invention includes a simple matrix driving display panel, a static driving display panel that does not use a switching element in the panel itself, and three thin film transistors (TFTs). Various types of information display panels such as an active matrix drive type display panel using a two-terminal switching element represented by a terminal switching element or a thin film diode (TFD) can be used.

It is a figure which shows the usage example of the touchscreen integrated information display apparatus of this invention. (A), (b) is a figure which respectively shows the fundamental structure of the information display panel used for a display apparatus by this invention, for example. It is a figure which shows the structural example of the touchscreen integrated information display apparatus of this invention. It is a figure which shows the other structural example of the touchscreen integrated type information display apparatus of this invention. It is a figure which shows the other structural example of the touchscreen integrated type information display apparatus of this invention. It is a figure which shows the other structural example of the touchscreen integrated type information display apparatus of this invention. It is a figure which shows an example of the shape of the partition in the information display panel used for a display apparatus by this invention. It is a figure for demonstrating the structure of the touchscreen integrated information display apparatus of a prior art example.

Explanation of symbols

1 Substrate (Back side substrate)
2 Substrate (Display side transparent substrate)
3 Display media (particle group)
3W White display medium 3B Black display medium 3Wa White particles for display 3Ba Black particles for display 4 Bulkhead 5 Electrode 6 Transparent electrode 11 Touch panel integrated information display device 12 Display device (information display panel)
13 Touch Panel 14 Upper Substrate 15 Upper Transparent Electrode 16 Lower Transparent Electrode 17 Spacer 18 Hard Coat 19 Antireflection Film 19a, 19b Thin Film (Organic Film)
20 Titanium oxide film

Claims (5)

A touch panel integrated information display device comprising a display device for displaying information and a touch panel for inputting information to the display device,
A touch panel integrated information display device, wherein an antireflection film is formed on the outermost surface of the touch panel. A touch panel integrated information display device comprising a display device for displaying information and a touch panel for inputting information to the display device,
A touch panel integrated information display device, wherein the thickness of the transparent electrode on the display surface side of the display device is 40 nm or less. A touch panel integrated information display device comprising a display device for displaying information and a touch panel for inputting information to the display device,
A touch panel integrated information display device, wherein a thin film having a refractive index of 1.45 to 1.65 and a film thickness of 20 to 150 nm is formed on the display surface side transparent electrode of the display device. A touch panel integrated information display device comprising a display device for displaying information and a touch panel for inputting information to the display device,
A touch panel integrated information display device, wherein a titanium oxide film having a film thickness of 40 to 100 nm is formed between a display surface side substrate and a display surface side transparent electrode of the display device.   An information display panel constituting the display device for displaying the information encloses a display medium made of colored particles for display having a charging property between two opposing substrates, at least one of which is transparent, The touch panel integrated information display device according to any one of claims 1 to 4, wherein the display medium is moved by the generated electric field to display information such as an image.

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