JP2001195186A - Low-reflection touch panel with specific display part containing metallic pattern - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a low-reflection touch panel with a specific display part containing metallic patterns with small change of hue and on which an observer can confirm almost the same metallic patterns as the ones in the case without an antireflection filter. SOLUTION: In this low-reflection touch panel of a circular polarization system to be constituted by arranging at least an optical isotropic plate, two layers of transparent conductive films to be opposed via spacers, a second quarter wave plate, a polarization plate in the order from the side of a liquid crystal display and to be installed on the liquid crystal display via a first quarter wave plate, the specific display part containing the metallic patterns is formed by partially arranging a metallic gloss layer at a position nearer the side of the liquid crystal display then the second quarter wave plate and an optical phase difference film to give phase difference of 100 to 175 nm is arranged between the second quarter wave plate and the metallic gloss layer so that its light axis is orthogonally crossed with that of the second quarter wave plate.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a low-color display having a specific display portion including a metal pattern in which a change in color tone is small and an observer can see almost the same metal pattern as in the case without an anti-reflection filter. The present invention relates to a reflective touch panel.

[0002]

2. Description of the Related Art A touch panel is usually mounted on a liquid crystal display such as a PDA 17 (portable information terminal). The basic structure of the touch panel 11 is such that two transparent plates 12 on which a transparent conductive film is formed are arranged so that the transparent conductive films 5 face each other via a spacer 6. The transparent conductive films insulated by the spacer 6 are brought into contact with each other by pressing a part of the panel surface with a dedicated pen, a finger, or the like to allow electrical conduction and input while seeing through the like. .

In many of the touch panels 11, a touch input unit 18 exists not only on the variable display unit 15 of the liquid crystal display 9 but also on a specific display unit 16 using an icon sheet 13 (see FIGS. 3 and 4). . The icon sheet 13
Switch patterns such as patterns that need to be always displayed on the touch input unit 18 and frequently used functions are 0.1 to 0.2 m thick.
The main object is to reduce the area of the variable display unit 15 and improve the design, etc. When displaying the metal pattern on the specific display section 16,
The metallic glossy layer 2 printed using the ink containing the metal particles in the binder is formed as one constituent layer of the icon sheet 13. In addition, if there is a step due to the icon sheet 13 on the surface of the touch input unit 18, there is a problem in inputting with a dedicated pen or a finger. Therefore, the icon sheet 13 is usually partially arranged as the lowermost layer of the touch panel 11 and used. This is seen through the two transparent plates 12 of the touch panel 11 on which the transparent conductive film 5 is formed.

Conventionally, when performing an input operation in a room having a fluorescent light or the like or outdoors, light from the outside is reflected on the surface of the transparent conductive film 5, so that the display screen of the touch panel 11 is very difficult to see. Was. In order to solve such a problem, Japanese Unexamined Patent Application Publication No. 10-48625 discloses a two-layer transparent conductive film opposed to each other via a first quarter-wave plate 10 and a spacer 6 in this order from the liquid crystal display 9 side. 5, a mounting structure of a touch panel in which at least a second quarter-wave plate 7 and a polarizing plate 8 are arranged has been proposed (see FIG. 5). The second quarter-wave plate 7 and the polarizing plate 8 form a circular polarization type anti-reflection filter, and the reflection of light incident from the outside on the transparent conductive film 5 is efficiently cut. Also, if only one second quarter-wave plate 7 is used, the linearly polarized light 2 incident for display from the liquid crystal display 9 side is also changed to circularly-polarized light.
By disposing a first quarter-wave plate 10 whose optical axis is orthogonal to the optical axis between the two transparent conductive films 5 and the liquid crystal display 9, the phase is canceled. That is, the first quarter
After being circularly polarized by the wave plate 10, the second quarter wave plate 7
Is returned to the original linearly polarized light again. Also, the transparent conductive film 5
May be formed on an optically isotropic plate 4 such as an optically isotropic glass plate or an optically isotropic transparent resin film.
May be formed directly on at least one of the １ ／ wavelength plate 10 and the second 波長 wavelength plate 7.

[0005]

However, when the transparent conductive film 5 is not directly formed on the first quarter-wave plate 10 as shown in FIG. Opposing each other via the elastic plate 4 and the spacer 6
When the low-reflection touch panel 1 including at least the transparent conductive film, the second quarter-wave plate 7 and the polarizing plate 8 is disposed on the liquid crystal display 9 via the first quarter-wave plate However, when the metal pattern is displayed using the icon sheet 13 having the metallic glossy layer 2 as it is (see FIG. 6), the following problem occurs.

The second quarter-wave plate 7 and the polarizing plate 8
Anti-reflection filter and icon sheet 13 formed of
Since the first quarter-wave plate 10 does not exist between the first and the second quarter-wave plates 7, the external light that has passed through the polarizing plate 8 and has become linearly polarized light has once passed through the second quarter-wave plate 7, and has an icon sheet. 13 after reflection on the metallic luster layer 2 of the second
Is transmitted to the polarizing plate 8. When the light passes through the optical retardation film having the same optical axis twice, the retardation is simply added (１ ／ λ + ／ λ = １ ／ λ), which is the same as transmitting through a half-wave plate. . And
Since this half-wave plate functions to change the optical axis of the transmitted linearly polarized light by 90 degrees, the half-wave plate cannot pass through the polarizing plate 8 again. The component near the center wavelength of 550 nm (green) (400 nm to 700 nm) is cut off by the antireflection filter. On the surface of the metallic gloss layer 2, the wavelength in the visible light region is largely reflected as a whole, and the observer recognizes the metal pattern by sensing all of the light components. However, as a result of the cut, the red and blue components at both ends of the visible light region transmitted through the antireflection filter are relatively prominently perceived by the observer, so that the metal pattern tends to be reddish purple and easily recognized.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to solve the above-mentioned problems, and it is possible to observe a metal pattern in which a change in color tone is small and almost the same metal pattern as that without an antireflection filter can be confirmed by an observer. An object of the present invention is to provide a low-reflection touch panel having a specific display unit including a pattern.

[0008]

In order to achieve the above object, the present invention provides an optically isotropic plate, a two-layered transparent conductive film opposed via a spacer, and a second 1 / At least a four-wavelength plate and a polarizing plate are arranged,
In a circularly-polarized low-reflection touch panel installed on a liquid crystal display via a first quarter-wave plate, a metallic gloss layer is partially arranged at a position closer to the liquid crystal display than the second quarter-wave plate. To form a specific display portion including a metal pattern, and a 100% distance between the second quarter-wave plate and the metallic luster layer.
An optical retardation film giving a phase delay of １７175 nm was arranged so that its optical axis was orthogonal to the optical axis of the second quarter-wave plate.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail with reference to the drawings. FIGS. 1 and 2 are cross-sectional views showing one embodiment in which a low-reflection touch panel having a print display unit according to the present invention is installed on a liquid crystal display via a first quarter-wave plate. In the figure, 1 is a low-reflection touch panel, 2 is a metallic gloss layer, 3 is an optical retardation film that gives a phase delay of 100 to 175 nm, 4 is an optically isotropic plate,
5 is a transparent conductive film, 6 is a spacer, 7 is a second quarter-wave plate, 8 is a polarizing plate, 9 is a liquid crystal display, and 10 is a first
, A reference numeral 14 denotes a base material sheet, 15 denotes a variable display part, and 16 denotes a specific display part.

The optically isotropic plate 4 disposed on the fixed side has a transparent conductive film 5 directly formed on the front surface thereof. Examples of the optically isotropic plate 4 include an optically isotropic glass plate such as a common soda glass, an optically isotropic resin film such as polycarbonate, polyarylate, polyethersulfone, and polysulfone, and an optically isotropic plate. Uses a resin plate having a characteristic.

The first quarter-wave plate 10 and the second quarter-wave plate 7 of the low-reflection touch panel 1 have a temporal phase shift (position) between two orthogonally polarized components obtained by resolving linearly polarized light. Phase difference) and a function of changing linearly polarized light into circularly polarized light or substantially circularly polarized light. The optical retardation film has a phase difference of 1/1 of the center wavelength (about 550 nm) in the visible light region (about 400 nm to 700 nm). 4 wavelengths, about 138
nm. If the amplitudes of the two orthogonal polarization components are equal, the polarization is circular, otherwise the polarization is elliptical.

As these quarter-wave plates, a transparent plate or film of polycarbonate, polyarylate, polyethersulfone, polysulfone, norbornene-based resin or the like is uniaxially stretched, and the stretching direction (optical axis direction) is x.
And the refractive index in the y direction orthogonal to the x direction,
The one that gives a phase difference of 1/4 wavelength by controlling the refractive index in the thickness direction, that is, the z direction orthogonal to the x direction and the y direction, is used.

The second quarter-wave plate 7 of the low-reflection touch panel 1 is combined with a polarizing plate 8 on the front surface thereof to form a circularly-polarized type antireflection filter. 45 ° with respect to the optical axis of the second quarter-wave plate 7
Or it is formed so as to be 135 °. Due to this antireflection filter, light from the outside such as indoor fluorescent lamps and outdoor light passes through the polarizing plate 8 and becomes linearly polarized light.
Although the light becomes circularly polarized light by transmitting through the wave plate 7, the circularly polarized light passes through the second quarter-wave plate 7 again and is perpendicular to the transmission axis of the polarizing plate 8 even when reflected by the surface of the transparent conductive film 5. The reflected light is suppressed because of the linearly polarized light. Note that the second quarter-wave plate 7 has flexibility to facilitate input with a pen or finger.

The optical axis of the second quarter-wave plate 7 is relative to the optical axis of the first quarter-wave plate 10 disposed between the low reflection touch panel 1 of the present invention and the liquid crystal display 9. It is preferable that they are arranged in directions orthogonal to each other. With this arrangement, the linearly polarized light incident on the first quarter-wave plate 10 for display from the liquid crystal display 9 side becomes circularly polarized light by transmitting through the first quarter-wave plate 10. However, by passing through the second quarter-wave plate 7, the light returns to linearly polarized light again, and the image is displayed as it is through the polarizing plate 8.

The polarizing plate 8 is generally made of a polyvinyl alcohol film impregnated with a dichroic dye such as iodine or a dye and stretched, and coated on both sides with a cellulose or acrylic protective film. Used. Further, a low reflection treatment, an antifouling treatment, a satin finish treatment and the like can be applied to the polarizing plate 8. Alternatively, the films subjected to these treatments may be bonded on the polarizing plate 8 via an adhesive or the like. Further, some of the above processes may be used in combination. Here, examples of the low-reflection treatment include applying a low-reflection material using a fluorine resin, a silicon resin, or the like, and forming a metal multilayer film by a vacuum evaporation method, a sputtering method, or the like. The antifouling treatment includes applying an antifouling material using a fluororesin or the like. Also,
Examples of the satin finish include sand blasting, embossing, mat coating, and etching.

The two transparent conductive films 5 are opposed to each other with a spacer 6 interposed therebetween, and serve as electrodes of a touch panel. Examples of the material of the transparent conductive film 5 include tin oxide, indium oxide,
Metal oxides such as antimony oxide, zinc oxide, cadmium oxide, and ITO, and thin films of metals such as gold, silver, copper, tin, nickel, aluminum, and palladium are used. As a method for forming the transparent conductive film 5, a vacuum deposition method, a sputtering method, an ion plating method, a CVD method, or the like is used. In the present invention, as shown in FIG.
The transparent conductive film 5 may be formed directly on the wave plate 7,
An optically isotropic transparent plate such as an optically isotropic resin film or an optically isotropic resin plate similar to the optically isotropic plate 4 between the 波長 wavelength plate 7 and the transparent conductive film 5. May be interposed. Also, at least one of the surfaces of the transparent conductive film 5 may be subjected to a satin finish for the purpose of preventing generation of Newton rings. The satin finish can scatter light and suppress light interference between the transparent electrodes. Further, a low reflection process may be performed.

The spacer 6 is made of one of the transparent conductive films 5
Is formed on the surface. The spacer 6 can be obtained by forming a transparent photocurable resin into fine dots by a photo process. Alternatively, the spacer 6 can be formed by forming a large number of fine dots by a printing method.
Further, between the members on which the transparent conductive film 5 of the low-reflection touch panel 1 is directly formed, only the outside of the display area is adhered by a double-sided adhesive tape or a transparent adhesive.

A feature of the present invention is that a specific display portion 16 including a metal pattern is formed by partially disposing the metallic glossy layer 2 at a position closer to the liquid crystal display 9 than the second quarter-wave plate 7.
Between the second quarter-wave plate 7 and the metallic luster layer 2
The optical retardation film 3 giving a phase delay of 175 nm is arranged so that its optical axis is orthogonal to the optical axis of the second quarter-wave plate 7. In the embodiment shown in FIG.
The metallic luster layer 2 is formed directly on the back surface of the optical retardation film 3 giving a phase delay of 100 to 175 nm, and is disposed as the lowermost layer of the low reflection touch panel 1.

The optical retardation film 3 which gives a phase delay of 100 to 175 nm is an optical retardation film which gives a temporal phase shift (phase difference) to two component polarized lights which are orthogonal to each other and is decomposed into linearly polarized light. Especially, the phase difference is 10
The range is 0 to 175 nm, that is, ± 40 nm of a quarter wavelength (about 138 nm). With this configuration, the external light that has passed through the polarizing plate 8 and has become linearly polarized light is once transmitted to the second quarter-wave plate 7 and 100 to 17.
After passing through the optical retardation film 3 giving a phase delay of 5 nm and reflecting on the metallic luster layer 2, 100 to 1
The light passes through the optical retardation film 3 giving a phase delay of 75 nm and the second quarter-wave plate 7 and goes to the polarizing plate 8. The second quarter-wave plates 7 and 100 to 1
In the case of passing twice through an optical retardation film whose optical axes are orthogonal to each other, such as the optical retardation film 3 giving a phase delay of 75 nm, the phase difference is simply subtracted (１ ／ λ−1 / 4λ ± 40).
nm = 0 ± 40 nm), the axis of the linearly polarized light that reaches the metallic gloss layer 2 is almost the same as the axis of the linearly polarized light that first passes through the polarizing plate 8. And the metallic luster layer 2
Even after reflection at, the light passes through the optical retardation film orthogonal to the optical axis twice, so that the axis of linearly polarized light does not change.
The light can pass through the polarizing plate 8 again. As a result, the component near 550 nm (green) of the light reflected by the metallic gloss layer 2 is hardly cut by the anti-reflection filter, so that the color components in the visible light region entirely pass through the anti-reflection filter. In addition, a change in color tone is small. That is, the observer can confirm almost the same metal pattern as in the case without the antireflection filter.

As described above, the above-mentioned optical retardation film disposed between the second quarter-wave plate 7 and the metallic luster layer 2 has a metal pattern as long as it has a phase delay of 100 to 175 nm. Can be suppressed to a small extent and is within a sufficiently allowable range, but is most preferably a quarter-wave plate. If it exceeds 175 nm, it becomes yellowish,
If it is less than 100 nm, it will be bluish.

As the optical retardation film 3 giving a phase delay of 100 to 175 nm, a transparent plate or film of polycarbonate, polyarylate, polyether sulfone, polysulfone, norbornene resin or the like can be used as in the case of the quarter-wave plate. The film is uniaxially stretched, and the refractive index in the x direction, which is the stretching direction (optical axis direction), the refractive index in the y direction orthogonal to the x direction, and the refractive index in the thickness direction, that is, the z direction orthogonal to the x direction and the y direction. And 100 to 1 by controlling
One having a phase difference of 75 nm is used.

The metallic luster layer 2 is for expressing a metal pattern in the specific display section 16, and is made of an ink containing metal particles using a polyester resin, an acrylic resin, an epoxy resin or the like as a binder. Ordinary printing methods such as offset printing, gravure printing, screen printing, or vacuum evaporation, sputtering,
It is formed by an ion plating method, a plating method, or the like. In these cases, use metals such as aluminum, nickel, gold, platinum, chromium, iron, copper, tin, indium, silver, titanium, lead, and zinc, or alloys or compounds thereof, depending on the metallic luster color to be expressed. . The metallic luster layer 2 formed by the printing method may further contain a pigment or dye of an appropriate color as a coloring agent to obtain a metallic pattern having a colored metallic luster. Further, a transparent colored layer containing a pigment or dye of an appropriate color as a coloring agent is disposed at a position on the front surface of the metallic gloss layer 2 in the configuration of the low reflection touch panel 1 so as to have a colored metallic gloss. It may be a metal pattern.

In FIG. 1, the metallic luster layer 2 is arranged as the lowermost layer of the low reflection touch panel 1. However, the second quarter-wave plate 7 and the optical phase difference giving a phase delay of 100 to 175 nm are provided. Any position may be used as long as the position is on the liquid crystal display 9 side of the film 3. For example, like a general icon sheet, a metallic gloss layer 2 is formed on the front surface of a base material sheet 14 and can be arranged on the back surface of an optical retardation film 3 that gives a phase delay of 100 to 175 nm (FIG. 2). reference). Further, the optical retardation film 3 giving a phase delay of 100 to 175 nm may be located anywhere between the second quarter-wave plate 7 and the metallic luster layer 2, and the metallic luster layer 2 is directly provided on the back surface. It need not be formed.

Further, in order to express a color pattern (including black and white) having no metallic luster in the specific display section 16, a polyester resin or an acrylic resin is provided somewhere in the structure of the low reflection touch panel 1. Alternatively, a color pattern layer containing an epoxy resin or the like as a binder and a pigment or dye of an appropriate color as a colorant may be provided. In the case of this color pattern layer, even if it is disposed between the second quarter-wave plate 7 and the optical retardation film 3 which gives a phase delay of 100 to 175 nm, the metallic luster is displayed on the specific display section 16. A change like a metal pattern is unlikely to occur in the hue of a color pattern that does not occur. Because, on the surface of the color pattern layer, only light of a specific wavelength corresponding to the color of the color pattern layer is reflected in the visible light region, and the observer senses the reflected light (color component) to change the color pattern. It has recognized. Therefore, even if the component around 550 nm is cut by the anti-reflection filter, the component of the light reflected on the surface of the color pattern layer is still noticeable to the observer, and the color tone of the metal pattern changes. Is difficult to recognize. As a method of forming the color pattern layer, an offset printing method,
A normal printing method such as a gravure printing method or a screen printing method may be used. To perform multicolor printing and gradation expression,
In particular, offset printing and gravure printing are suitable.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, an ITO film having a thickness of 0.04 was formed on a roll-shaped polyarylate film stretched and formed to have a wavelength of １ ／ (138 nm) by sputtering.
It was formed to have a thickness of 2 μm. After cutting the roll film into a sheet, the I-axis is set so that the optical axis is horizontal.
An etching resist was formed in a pattern on the TO film by screen printing, and an unnecessary portion of the ITO film was removed with hydrochloric acid to form a rectangular transparent electrode. After the etching, the resist is removed with an alkaline solution, and a pair of parallel bus bar electrodes is formed by screen printing on both sides of the transparent electrode using silver ink. At the same time, a routing circuit from the bus bar electrode was also formed, and an upper electrode sheet was formed.

On the other hand, an ITO film was formed on one side of a soda glass plate by vacuum evaporation so as to have a thickness of 0.02 μm.
Fine dot-shaped spacers were formed on the TO film by a photo process using an epoxy acrylate-based photocurable resin. Furthermore, a pair of parallel bus bar electrodes is formed by screen printing using a silver ink on the ITO film,
The lower electrode substrate was used.

Next, on the surface of the upper electrode sheet where the transparent electrodes are formed, a double-sided tape having a thickness of 60 μm is punched out of a portion corresponding to the panel visible area and a portion of the wiring circuit on which the conductive adhesive is applied. A conductive adhesive obtained by dispersing a silver filler in a silicon resin was applied by a dispenser to a portion where the double-sided tape was removed from the bonding and routing circuit.

Next, the upper electrode sheet and the lower electrode substrate are opposed to each other so that the surfaces on which the transparent electrodes are formed are opposed to each other, so that the bus bar electrodes of the upper electrode sheet and the bus bar electrodes of the lower electrode substrate are squarely arranged. Stuck together. Furthermore, the absorption axis is at 45 ° to the optical axis (horizontal direction) of the upper electrode sheet.
The anti-reflection filter was formed by laminating the inclined polarizing plates over the entire surface.

Also, a quarter wavelength (138 nm)
A roll-shaped polycarbonate film stretched and formed into a strip so that it becomes a strip shape, and a metal colored green by screen printing using an ink containing an aluminum paste and a green pigment in a polyester resin on one side A glossy metallic layer was formed over the entire surface. Further, icon patterns such as characters, symbols, and figures were formed on the metallic glossy layer by screen printing using an ink containing a black pigment in a polyester resin.

An adhesive is formed by screen printing on the surface of the strip-shaped sheet opposite to the surface on which the metallic luster layer is formed, and is adhered to the back surface of the lower electrode substrate along one end to form a low-reflection touch panel. Obtained.

When the low-reflection touch panel obtained as described above was observed from the surface, a metal pattern having almost the same hue as that without the anti-reflection filter could be confirmed.

[0032]

The low-reflection touch panel having a specific display portion including a metal pattern according to the present invention has the following configuration, and therefore has the following excellent effects.

That is, an optically isotropic plate, a two-layered transparent conductive film, a second quarter-wave plate, and a polarizing plate which face each other via a spacer are arranged in this order from the liquid crystal display side. In the circularly polarized low-reflection touch panel installed through the first quarter-wave plate, a metal gloss layer is partially arranged at a position closer to the liquid crystal display than the second quarter-wave plate. An optical retardation film that forms a specific display portion including a pattern and gives a phase delay of 100 to 175 nm between the second quarter-wave plate and the metallic luster layer has an optical axis of the second quarter wavelength. Since the light is arranged so as to be orthogonal to the optical axis of the plate, the component near 550 nm (green) of the light reflected on the metallic gloss layer is hardly cut by the antireflection filter, and the color component in the visible light region. But Body to the anti-reflection filter passes, requires a change in hue is small. That is, an observer can confirm a metal pattern having almost the same color as that obtained without the anti-reflection filter.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an embodiment in which a low-reflection touch panel having a print display unit according to the present invention is installed on a liquid crystal display via a first quarter-wave plate.

FIG. 2 is a cross-sectional view showing an embodiment in which a low-reflection touch panel having a print display unit according to the present invention is installed on a liquid crystal display via a first quarter-wave plate.

FIG. 3 is a diagram illustrating a touch input unit of the PDA.

FIG. 4 is a cross-sectional view showing one embodiment in which a conventional touch panel having a specific display unit is provided on a liquid crystal display.

FIG. 5 is a cross-sectional view showing an example in which a conventional low-reflection touch panel is installed on a liquid crystal display via a first quarter-wave plate.

FIG. 6 shows an example in which an icon sheet is added as a lowermost layer of a conventional low reflection touch panel, and a first quarter is displayed on a liquid crystal display.
It is sectional drawing which shows one Example installed via the wave plate.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Low-reflection touch panel 2 Metallic gloss layer 3 Optical retardation film giving a phase delay of 100 to 175 nm 4 Optically isotropic plate 5 Transparent conductive film 6 Spacer 7 Second 1/4 wavelength plate 8 Polarizing plate 9 Liquid crystal display 10th 1/4 wavelength plate 11 Touch panel 12 Transparent plate 13 Icon sheet 14 Base sheet 15 Variable display section 16 Specific display section 17 PDA 18 Touch input section

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G09F 9/35 G09F 9/35 5G435 F-term (Reference) 2H088 EA22 HA16 HA18 HA21 MA20 2H089 QA05 QA16 TA14 TA15 TA17 2H091 FA08X FA08Z FA11X FA11Z FB02 FC02 FC07 FC12 FC26 FD15 GA01 GA08 LA20 5B087 AB16 AE00 CC02 CC14 5C094 AA03 BA43 ED14 FB03 5G435 BB12 CC09 FF05 GG11 HH08 LL07 LL08

Claims (2)

[Claims] 1. An optically isotropic plate, a two-layered transparent conductive film, a second quarter-wave plate, and a polarizing plate facing each other via a spacer are arranged at least from the liquid crystal display side,
In a circularly-polarized low-reflection touch panel installed on a liquid crystal display via a first quarter-wave plate, a metallic gloss layer is partially arranged at a position closer to the liquid crystal display than the second quarter-wave plate. An optical retardation film that forms a specific display portion including a metal pattern and gives a phase delay of 100 to 175 nm between the second quarter-wave plate and the metallic luster layer has an optical axis of the second 1/4 wavelength plate. A low-reflection touch panel having a specific display portion including a metal pattern, which is arranged so as to be orthogonal to an optical axis of a / 4 wavelength plate. 2. The specific retardation film including a metal pattern according to claim 1, wherein the optical retardation film disposed between the second quarter-wave plate and the metallic luster layer is a quarter-wave plate. Low reflection touch panel.