JP6513548B2 - Input device - Google Patents

Description

  The present invention relates to an input device, and more particularly to an input device provided with a film having a two-dimensional or three-dimensional curved surface.

  In various information processing apparatuses, a translucent input device is disposed in front of a display panel such as a color liquid crystal panel. This input device is called a touch panel. In the touch panel, a capacitance is formed between the electrodes, and the coordinates of the approach position of the finger are determined from the change in movement of the charge when the finger of the person approaches. A capacitive sensor is used to detect this change in charge transfer.

The touch panel has a structure that transmits almost all of the light emitted from the display panel. Therefore, the operation surface of the touch panel is often a flat surface because of the restriction on the shape of the display panel.
On the other hand, in recent years, a display device that displays on a two-dimensional or three-dimensional curved surface has appeared, and it is necessary to be mounted in a shape corresponding to such a display curved surface also in a touch panel.

  Patent Document 1 discloses a transmission screen that transmits image light projected from the light incident side to the light output side, and includes a laminated plate bent to form a three-dimensional curved surface. Further, Patent Document 1 discloses a display device provided with the transmissive screen and an image light source. Such a display device is called, for example, a rear projection display device or the like.

  Unlike a liquid crystal panel, the rear projection type display apparatus forms an image of image light projected from an image light source on a transmission type screen. Then, the observer views the image formed on the transmissive screen. Therefore, in general, the transmissive screen has a light diffusion layer that diffuses the transmitted light isotropically.

  Further, the display device described in Patent Document 1 includes an infrared light source for projecting infrared light onto a transmission screen, and a detection unit for detecting the incidence of the infrared light, and is reflected by the detection target By detecting the infrared light, it has a function of detecting the contact or approach of the object to be detected on the transmission screen. That is, the transmissive screen described in Patent Document 1 has a function (touch panel function) for detecting contact or approach of a detection object, and a function (image for transmitting image light projected from an image light source (transmission screen) Function) and.

JP 2012-32513 A

  However, the detection means described in Patent Document 1 detects infrared light reflected by the object to be detected through the laminated plate having the light diffusion layer. Therefore, the transmission type screen described in Patent Document 1 is, for example, a capacitance type such as hovering (proximity) detection of a certain distance (a few millimeters (mm) to a few centimeters (cm) or more). It does not have the merit of a sensor.

  Furthermore, in the case of a transmission screen having a three-dimensional curved surface as described in Patent Document 1, when using a capacitive sensor, the visibility of the transparent conductive pattern may be a problem. That is, for example, the capacitance type sensor includes a plurality of electrode layers, and detects a contact position by detecting a change in capacitance between the plurality of electrode layers. A transparent conductive pattern formed on the electrode layer may be visible through the transmissive screen.

  The present invention is intended to solve the above-mentioned conventional problems, and an input device having a function of a capacitance type sensor and a function of a transmission screen and provided with a film having a curved surface, which has a transparent conductive pattern An object of the present invention is to provide an input device capable of suppressing the problem of visibility.

  The input device of the present invention is an input device having a function of a capacitance type sensor for detecting the position of a detection target, and a function of a transmission screen for transmitting image light projected from the light incident side to the light emission side. It is an apparatus, It is provided in the said light emission side of the electrostatic sensor part which has a film which has a translucent curved surface, the electrode layer provided in the said film, and the said electrostatic sensor part, And a light diffusion layer for diffusing the image light that has been transmitted through the sensor unit and formed into an image.

  According to the input device of the present invention, since the electrostatic sensor unit having the film having the curved surface and the electrode layer and the light diffusion layer are provided, the function of the capacitive sensor and the function of the transmissive screen An input device having a curved surface is formed.

  In addition, the light diffusion layer is provided on the light emission side of the electrostatic sensor unit. In other words, the light diffusion layer is provided on the front side of the electrostatic sensor unit as viewed from the light emission side (observer side). Therefore, the transparent conductive pattern formed on the electrode layer of the electrostatic sensor unit can not be visually recognized from the light emission side.

  That is, when the image light projected from the light incident side passes through the electrostatic sensor unit, it does not form an image yet. The image light projected from the light incident side forms an image on the light diffusion layer provided on the light emission side of the electrostatic sensor unit. Therefore, not the imaged image light but the image light before imaging is transmitted through the electrostatic sensor unit. Then, the image light formed on the light diffusion layer provided on the light emission side of the electrostatic sensor unit is diffused in the horizontal direction and the vertical direction.

  Thereby, the problem of the visibility of the transparent conductive pattern of the electrostatic sensor part can be suppressed. Therefore, the restriction of the thickness and width of the transparent conductive pattern can be relaxed, and the resistance of the electrode layer of the electrostatic sensor unit can be further lowered, and the input device of the present invention has a further large screen. It can correspond to

  In the input device of the present invention, the light diffusion layer may be provided on the surface of the film opposite to the surface of the film provided with the electrode layer. According to this, it is possible to more easily form the light diffusion layer with high accuracy and thin uniform thickness. That is, the surface of the film of the electrostatic sensor unit is relatively smooth and has almost no unevenness. By forming a light diffusion layer on the surface of such a relatively smooth film, the accuracy of layer formation can be enhanced. Further, when the light diffusion layer and the electrode layer are thus brought close to each other through the film, when the electrode layer is provided on the light emission side of the light diffusion layer, the electrode layer is visible from the light emission side of the input device It will On the other hand, in the input device of the present invention, the electrode layer is provided on the light incident side of the light diffusion layer even if the light diffusion layer and the electrode layer are close to each other via the film, so the electrode layer is provided. It can suppress that it sees from the light emission side of an input device.

  The light diffusion layer may be provided over substantially the entire surface of the film of the electrostatic sensor unit. According to this, compared with the case where the light diffusion layer is not provided on the light emission side of the electrostatic sensor unit, the problem of the visibility of the transparent conductive pattern of the electrostatic sensor unit can be further reduced.

  In the input device of the present invention, the light diffusion layer is provided by dispersing a light-transmitting adhesive resin and the inside of the adhesive resin, and a light diffusing material having a refractive index different from that of the adhesive resin. And may be included. According to this, the light diffusion layer is bonded in the light diffusion layer due to the difference between the refractive index of the adhesive resin and the refractive index of the light diffusion material, or due to the reflectivity of the light diffusion material. The imaged image light can be diffused horizontally and vertically.

  The input device according to the present invention may further include a Fresnel lens sheet part provided on the light incident side of the electrostatic sensor part and deflecting the traveling direction of the image light projected from the light incident side. According to this, since the Fresnel lens sheet part deflects the traveling direction of the image light and converts the divergent light flux into a parallel light flux, it is possible to improve the optical characteristics as a transmission type screen.

  In the input device of the present invention, the Fresnel lens sheet unit is provided between the Fresnel lens sheet unit and the electrostatic sensor unit, and transmits a part of the image light transmitted through the Fresnel lens sheet unit, and the Fresnel lens sheet unit The light control sheet unit may further include a light control sheet unit that absorbs another part of the image light transmitted through the light control unit. According to this, the light control sheet portion transmits the image light from the light incident side to the light output side with a predetermined transmittance, and absorbs unnecessary light (unnecessary diffused light). Therefore, the optical characteristics of the transmissive screen can be improved.

  According to the present invention, in an input device having a function of a capacitive sensor and a function of a transmission screen and provided with a film having a curved surface, an input device capable of suppressing the problem of visibility of a transparent conductive pattern It will be possible to provide.

FIG. 2 is a schematic perspective view illustrating the input device according to the embodiment. FIG. 7 is a schematic exploded view showing each member of the input device according to the present embodiment in the direction of travel of image light. It is a model top view which illustrates the input device concerning the example of this embodiment.

Hereinafter, embodiments of the present invention will be described based on the drawings. In the following description, the same members are denoted by the same reference numerals, and the description of the members once described will be omitted as appropriate.
FIG. 1 is a schematic perspective view illustrating the input device according to the present embodiment.
FIG. 2 is a schematic exploded view showing each member of the input device according to the present embodiment in the direction of travel of the image light.

  For the convenience of description, the external shape of the Fresnel lens sheet unit 10 shown in FIG. 2 is not reflected in the input device 1 shown in FIG. Further, the ratio of the thickness of each layer and each member of the input device 1 (the length of the traveling direction A1 of the image light) is not necessarily between the input device 1 shown in FIG. 1 and the input device 1 shown in FIG. It does not match.

  The input device 1 according to the present embodiment has a function of a capacitive sensor and a function of a transmissive screen. That is, as shown by an arrow A1 shown in FIGS. 1 and 2, the image light projected from the light source (not shown) travels toward the input device 1, forms an image in the input device 1, and passes through the input device 1. . An observer sees the image formed in the input device 1. Thus, the input device 1 according to the present embodiment has the function of a transmissive screen.

  In addition, the input device 1 detects the position of the detection subject based on the change in capacitance generated between the transparent electrode and the detection subject such as a finger in contact with or close to the input device 1 (self-capacitance Detection type). Alternatively, the input device 1 applies a drive electrode to the first electrode, and detects the position of the detection target based on the change in capacitance between the second electrode and the detection target such as a finger ( Mutual capacitance detection type). The input device 1 may have the function of a self-capacitance detection type capacitance sensor or may have the function of a mutual capacitance detection type capacitance sensor.

  Specifically, the input device 1 according to the present embodiment includes the Fresnel lens sheet unit 10, the light control sheet unit 20, the electrostatic sensor unit 30, the light diffusion layer 40, and the transparent panel unit 50. Prepare. The Fresnel lens sheet unit 10, the light control sheet unit 20, the electrostatic sensor unit 30, the light diffusion layer 40, and the transparent panel unit 50 are on the light emission side (observer side) from the light incident side (light source side) It is arranged in order toward).

  That is, as shown in FIG. 2, the light control sheet unit 20 is provided on the light emission side of the Fresnel lens sheet unit 10. The electrostatic sensor unit 30 is provided on the light emission side of the light control sheet unit 20. The light diffusion layer 40 is provided on the light emission side of the electrostatic sensor unit 30. The transparent panel unit 50 is provided on the light emission side of the light diffusion layer 40.

  Here, in the specification of the present application, the “light incident side” refers to the side of the light source that projects the image light, and the “light emission side” refers to the side of the observer who views the image.

  The Fresnel lens sheet unit 10 has a plurality of single lenses, and has a function of deflecting the traveling direction of the image light projected onto the input device 1 as a diverging light beam from the light source. Specifically, the Fresnel lens sheet unit 10 converts the image light incident on the Fresnel lens sheet unit 10 as a divergent light beam into image light of a parallel light beam traveling from the light incident side to the light output side. For example, an ultraviolet curing resin or the like is used for the Fresnel lens sheet portion 10.

  The light control sheet unit 20 is provided on the light emission side of the Fresnel lens sheet unit 10. The light control sheet unit 20 includes, for example, a unit light transmitting unit having the same function as a lenticular lens or a microlens array, and an external light (unnecessary diffused light) absorbing unit. The light control sheet unit 20 transmits image light converted into parallel light flux by the Fresnel lens sheet unit 10 from the light incident side to the light output side with a predetermined transmittance, and absorbs unnecessary light (unnecessary diffused light). That is, the light control sheet unit 20 transmits a part of light of the image light transmitted through the Fresnel lens sheet unit 10 by the unit light transmission unit, and the other of the image light transmitted through the Fresnel lens sheet unit 10 A part of the light (unwanted diffused light) is absorbed by the outside light (unwanted diffused light) absorbing portion. For example, an ultraviolet curable resin is used for the light control sheet unit 20.

The electrostatic sensor unit 30 is provided on the light emission side of the light control sheet unit 20, and a film (see the film 31 illustrated in FIG. 3) and an electrode layer (see the electrode layer 33 illustrated in FIG. 3) Have. The film is translucent, and is a film-like transparent substrate such as polyethylene terephthalate (PET).
In the present specification, “transparent” and “translucent” refer to a state in which the visible light transmittance is 50% or more (preferably 80% or more). Furthermore, it is preferable that the haze value is 6% or less. In the present specification, the terms "light shielding" and "light shielding property" refer to a state in which the visible light transmittance is less than 50% (preferably less than 20%).

  As shown in FIG. 2, the film has a first surface 30a which is a curved surface. The first surface 30 a is, for example, a convex three-dimensional curved surface. In the present embodiment, the first surface 30 a side is a three-dimensional curved surface in which the first surface 30 a side is convex in any of the vertical and horizontal directions.

  The second surface 30 b is located opposite to the first surface 30 a of the film. Since the film has a uniform thickness, the second surface 30b is also a three-dimensional curved surface similar to the first surface 30a. The first surface 30a and the second surface 30b may have other shapes such as a two-dimensional curved surface or a concave shape. Here, in the present embodiment, the normal direction to the curved surface of the first surface 30 a is referred to as the thickness direction or the stacking direction.

  The electrode layer is provided on at least one of the first surface 30a of the film and the second surface 30b of the film. In the electrode layer, a pattern of an electrode (transparent conductive pattern) formed of a transparent conductive material is formed. The electrode layer has translucency and is one of the detection electrodes in the touch sensor. For the electrode layer, ITO (Indium Tin Oxide), a translucent organic conductive layer, a metal nanowire, or the like is used.

  The electrostatic sensor unit 30 has a function of a capacitive sensor. That is, in the input device 1 according to the present embodiment, when the finger is brought into contact with the operation surface 50a of the transparent panel unit 50, capacitance is generated between the finger and an electrode close to the finger. The input device 1 calculates the contact position of the finger based on the change in capacitance at this time (self-capacitance detection type).

  Alternatively, the electrostatic sensor unit 30 may be of a mutual capacitance detection type. That is, the electrostatic sensor unit 30 has a plurality of electrodes. Then, the electrostatic sensor unit 30 applies a drive voltage to the first electrode of the plurality of electrodes, and detects a change in capacitance between the second electrode of the plurality of electrodes and the finger. May be (Mutual capacitance detection type).

  The light diffusion layer 40 is provided on the light emission side of the electrostatic sensor unit 30. Specifically, the light diffusion layer 40 is provided on the surface of the film of the electrostatic sensor unit 30 (the surface opposite to the surface on which the electrode layer is provided). Therefore, it is possible to more easily form the light diffusion layer 40 with high accuracy and a thin and uniform thickness. That is, as described above, the film of the electrostatic sensor unit 30 is a film-like transparent substrate such as polyethylene terephthalate (PET). Therefore, the surface of the film of the electrostatic sensor unit 30 is relatively smooth and has almost no unevenness. By forming the light diffusion layer 40 on the surface of such a relatively smooth film, the accuracy of layer formation can be enhanced.

  When the electrode layer of the electrostatic sensor unit 30 is provided on the light emission side of the light diffusion layer 40, the electrode layer of the electrostatic sensor unit 30 is seen from the light emission side of the transparent panel unit 50. On the other hand, in the input device 1 according to the present embodiment, even if the light diffusion layer 40 and the electrode layer of the electrostatic sensor unit 30 are close to each other through the film of the electrostatic sensor unit 30, the static Since the electrode layer of the electrostatic sensor unit 30 is provided on the light incident side of the light diffusion layer 40, the electrode layer of the electrostatic sensor unit 30 can be prevented from being viewed from the light emission side of the transparent panel unit 50.

  In addition, the formation method of each layer and each member except the transparent panel part 50 may be what formation methods, such as application | coating, vapor deposition, transcription | transfer, and bonding. The method of forming the transparent panel unit 50 will be described later.

  The light diffusion layer 40 has a light-transmitting adhesive resin and a light diffusion material. The refractive index of the adhesive resin is different from the refractive index of the light diffusing material. The light diffusion layer 40 has a structure in which a light diffusion material is dispersed inside the adhesive resin. The image light transmitted through the electrostatic sensor unit 30 forms an image in the light diffusion layer 40 and diffuses in the horizontal direction and the vertical direction. That is, the light diffusion layer 40 forms an image in the light diffusion layer 40 due to the difference between the refractive index of the adhesive resin and the refractive index of the light diffusion material or due to the reflectivity of the light diffusion material. Diffuse image light horizontally and vertically.

For the adhesive resin of the light diffusion layer 40, for example, methyl methacrylate-butadiene-styrene copolymer (MBS), acrylic resin, polycarbonate resin and the like are used.
For the light diffusion material of the light diffusion layer 40, for example, an organic filler such as plastic beads is used. Examples of the material of the plastic beads include melamine resin, acrylic resin, styrene- (meth) acrylic acid copolymer, polycarbonate, polyethylene, polystyrene, polyvinyl chloride and the like.

  The transparent panel unit 50 is provided on the light emission side of the light diffusion layer 40, and has an operation surface 50a. For example, an observer who views an image formed on the light diffusion layer 40 can perform an operation on the operation surface 50a by an operation body such as a finger. The transparent panel portion 50 is formed by an injection molding method in which a material having a light transmitting property and containing a synthetic resin such as polycarbonate or acrylic resin in a molten state is injected into a mold.

Here, a method of manufacturing the input device 1 according to the present embodiment will be described.
First, the Fresnel lens sheet unit 10, the light control sheet unit 20, the electrostatic sensor unit 30, and the light diffusion layer 40 are sequentially arranged from the light incident side to the light output side, and are bonded to each other. As described above, the formation method of each layer and each member may be any formation method such as coating, vapor deposition, transfer, and bonding.

  The electrode layer of the electrostatic sensor unit 30 is formed by photolithography, etching, and screen printing. For example, in the case of forming by photolithography and etching, for example, an ITO layer is formed on the surface of the film of the electrostatic sensor unit 30 by sputtering, and a resist is formed thereon. After the resist is exposed and developed and patterned, the ITO layer is etched. Thereafter, the resist is peeled off. Thus, an electrode layer formed of an ITO layer patterned on at least one of the first surface 30a of the film and the second surface 30b of the film is formed. Thus, the electrostatic sensor unit 30 is formed.

  Subsequently, a member (joining member) in which the Fresnel lens sheet unit 10, the light control sheet unit 20, the electrostatic sensor unit 30, and the light diffusion layer 40 are joined is inserted into an injection molding die, A material containing a synthetic resin having light properties is poured into a mold to form a transparent panel portion 50. At this time, the input device 1 having a two-dimensional or three-dimensional curved surface is manufactured. That is, a laminate of the Fresnel lens sheet unit 10, the light control sheet unit 20, the electrostatic sensor unit 30, the light diffusion layer 40, and the transparent panel unit 50 by in-mold lamination (IML), A laminate having a two-dimensional or three-dimensional curved surface is formed.

  The bonding member is specified as a pre-process for inserting the bonding member of the Fresnel lens sheet unit 10, the light control sheet unit 20, the electrostatic sensor unit 30, and the light diffusion layer 40 into a mold for injection molding. The preforming may be performed by heating to a temperature of That is, as a pre-process of forming the transparent panel portion 50, the bonding member may be preformed to have a shape having a two-dimensional or three-dimensional curved surface.

  By performing preforming on the bonding member, it is possible to relieve residual stress generated inside the bonding member by IML, and to obtain higher adhesion at the interface between the bonding member and the transparent panel portion 50. it can.

  According to the input device 1 according to the present embodiment, since the electrostatic sensor unit 30 having the electrode layer and the light diffusion layer 40 are integrated with each other, the function of the capacitance type sensor and the transmissive screen An input device 1 having the following functions can be realized.

  Further, as shown in FIG. 2, the light diffusion layer 40 is provided on the light emission side of the electrostatic sensor unit 30. In other words, the light diffusion layer 40 is provided on the front side of the electrostatic sensor unit 30 as viewed from the light emission side (for example, the operation surface 50 a of the transparent panel unit 50). Therefore, it is not possible to visually recognize the transparent conductive pattern of the electrostatic sensor unit 30 from the light emission side (observer side).

  That is, when the image light projected from the light source passes through the electrostatic sensor unit 30, it has not formed an image yet. The image light projected from the light source forms an image on the light diffusion layer 40 provided on the light emission side of the electrostatic sensor unit 30. Therefore, not the imaged image light but the image light before imaging is transmitted through the electrostatic sensor unit 30. Then, the image light formed on the light diffusion layer 40 provided on the light emission side of the electrostatic sensor unit 30 is diffused in the horizontal direction and the vertical direction, and is transmitted through the transparent panel unit 50.

  Thereby, the problem of the visibility of the transparent conductive pattern of the electrostatic sensor unit 30 can be suppressed. Therefore, the restriction of the thickness and the width of the transparent conductive pattern can be relaxed, and the resistance of the electrode layer of the electrostatic sensor unit 30 can be further reduced. Therefore, the input device 1 according to the present embodiment can correspond to an even larger screen.

  In addition, since the light diffusion layer 40 is provided substantially over the entire surface of the film of the electrostatic sensor unit 30, compared to the case where the light diffusion layer 40 is not provided on the light emission side of the electrostatic sensor unit 30. The problem of the visibility of the transparent conductive pattern of the electrostatic sensor unit 30 can be reduced.

  Furthermore, on the light incident side of the electrostatic sensor unit 30, the Fresnel lens sheet unit 10 and the light control sheet unit 20 are provided. Therefore, the optical characteristics of the transmission screen of the input device 1 can be improved.

Next, a specific example of the input device 1 according to the present embodiment will be described with reference to the drawings.
FIG. 3 is a schematic plan view illustrating the input device according to the specific example of the embodiment.
FIG. 3 corresponds to a schematic plan view when the input device is viewed in the direction of the arrow A2 shown in FIG.

  The input device 1 according to this specific example includes the light control function layer 5, the electrostatic sensor unit 30, the light diffusion layer 40, the transparent panel unit 50, and the decorative layer 60. The light control function layer 5, the electrostatic sensor unit 30, the light diffusion layer 40, and the transparent panel unit 50 are sequentially arranged from the light incident side (light source side) to the light emission side (observer side) ing.

That is, the electrostatic sensor unit 30 is provided on the light emission side of the light control function layer 5. The light diffusion layer 40 is provided on the light emission side of the electrostatic sensor unit 30. The transparent panel unit 50 is provided on the light emission side of the light diffusion layer 40.
The decorative layer 60 is provided on the first surface 40 a of the light diffusion layer 40. The first surface 40 a of the light diffusion layer 40 is a main surface on the light emission side, and is a main surface to be bonded to the transparent panel unit 50.

  The light control function layer 5 has a Fresnel lens sheet unit 10 and a light control sheet unit 20. The light control function layer 5 may have an overcoat layer. For example, the overcoat layer shields the Fresnel lens sheet unit 10 and the light control sheet unit 20 by shielding ultraviolet light emitted from the light source.

  The electrostatic sensor unit 30 has a film 31 and an electrode layer 33. The film 31 is translucent, and is a film-like transparent substrate such as polyethylene terephthalate (PET). The film 31 has a first surface 31 a which is a curved surface. The first surface 31 a is, for example, a convex three-dimensional curved surface. In this specific example, the first surface 31 a side is a three-dimensional curved surface in which the first surface 31 a is convex in any of the vertical and horizontal directions.

  The second surface 31 b is located opposite to the first surface 31 a of the film 31. Since the film 31 has a uniform thickness, the second surface 31 b is also a three-dimensional curved surface similar to the first surface 31 a. The first surface 31a and the second surface 31b may have other shapes such as a two-dimensional curved surface or a concave shape.

  The electrode layer 33 is provided on at least one of the first surface 31 a of the film 31 and the second surface 31 b of the film. In the input device 1 according to the specific example shown in FIG. 3, the electrode layer 33 is provided on the second surface 31 b of the film 31. In the electrode layer 33, a pattern of an electrode (transparent conductive pattern) formed of a transparent conductive material is formed. The electrode layer 33 has translucency and is one of the detection electrodes in the touch sensor. For the electrode layer 33, ITO (Indium Tin Oxide), a translucent organic conductive layer, metal nanowires or the like are used.

  The decorative layer 60 is provided in a region (detection region) NA other than the detection region VA in the first surface 40 a of the light diffusion layer 40. The detection area VA is an area that constitutes a sensor. The detection area NA is a periphery (outside) of the detection area VA, and is a frame-like decoration area. The decorative layer 60 has a light shielding property and covers the wiring routed around the outside of the detection area VA. The wiring routed around the outside of the detection area VA is electrically connected to the electrode layer 33 and is covered by the decorative layer 60, so it can not be seen from the side of the operation surface 50 a of the transparent panel 50.

  The arrangement, materials, and functions of the Fresnel lens sheet unit 10, the light control sheet unit 20, the electrostatic sensor unit 30, the light diffusion layer 40, and the transparent panel unit 50 are the same as those described with reference to FIGS. , The light control sheet unit 20, the electrostatic sensor unit 30, the light diffusion layer 40, and the transparent panel unit 50, respectively, in the same arrangement, material, and function.

  According to this example, the decorative layer 60 can cover the wiring routed around the outside of the detection area VA, and the same effect as the effect described above with reference to FIGS. 1 and 2 can be obtained.

  As described above, according to the present embodiment, the visibility of the transparent conductive pattern is provided in the input device 1 having the film 31 having the curved surface, which has the function of the capacitance type sensor and the function of the transmission type screen. It is possible to provide the input device 1 capable of suppressing the problem of

  Although the present embodiment has been described above, the present invention is not limited to these examples. For example, those skilled in the art may appropriately add, delete, or change the design of the components from the above-described embodiments, or may appropriately combine the features of the embodiments and the features of the present invention. As long as it is, it is contained in the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 input device 5 light control function layer 10 Fresnel lens sheet part 20 light control sheet part 30 electrostatic sensor part 30a 1st surface 30b 2nd surface 31 film 31a 1st surface 31b 2nd surface 33 electrode layer 40 light-diffusion layer 40a 1 side 50 transparent panel 50a operation surface 60 decoration layer VA detection area NA non-detection area A1 image light traveling direction (arrow)
A2 arrow

Claims (4)

The function of a capacitive sensor for detecting the position of the object to be detected;
A transmission screen function of transmitting image light projected from the light incident side to the light output side;
An input device having
An electrostatic sensor unit having a film having a translucent curved surface, and an electrode layer provided on the film;
A light diffusion layer provided on the light emission side of the electrostatic sensor unit, for diffusing the image light transmitted through the electrostatic sensor unit to form an image;
Equipped with
The light diffusion layer is provided on the surface of the film opposite to the surface of the film on which the electrode layer is provided,
An input device characterized in that the light diffusion layer is formed on the light emitting side surface of the film, and the electrode layer is formed on the light incident side surface of the film . The light diffusion layer is
Translucent adhesive resin,
A light diffusing material dispersed in the adhesive resin and having a refractive index different from that of the adhesive resin;
The input device according to claim 1, comprising: 2. The image forming apparatus according to claim 1 , further comprising: a Fresnel lens sheet unit provided on the light incident side of the electrostatic sensor unit and deflecting the traveling direction of the image light projected from the light incident side. The input device according to 2 . Provided between the Fresnel lens sheet portion and the electrostatic sensor portion, transmitting part of the image light transmitted through the Fresnel lens sheet portion, and transmitting the image light transmitted through the Fresnel lens sheet portion 4. The input device according to claim 3 , further comprising a light control sheet portion that absorbs another portion of the light.

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