JP2014182335A - On-vehicle curved surface screen member with adhesive layer, on-vehicle curved surface screen and on-vehicle display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an on-vehicle curved surface screen member with an adhesive layer, from which an on-vehicle curved surface screen having a curved surface shape can be manufactured while preventing generation of residual bubbles, and to provide an on-vehicle curved surface screen and an on-vehicle display device using the screen member.SOLUTION: An on-vehicle curved surface screen member 10 with an adhesive layer is to be used for an on-vehicle curved surface screen for transmitting imaging light coming from a light-entering surface side Lin to a light-exiting surface side Lout, in which the light-exiting surface is composed of a transparent glass substrate 9 having a curved surface shape. The screen member includes, successively from the light-exiting surface side, at least an adhesive layer 1, a light-diffusing layer 2 and a beam controlling layer 3. The adhesive layer has grooves 1v on the surface thereof. The beam controlling layer includes: light-absorbing portions 3A which can absorb light and are arranged along the layer plane; and light-transmitting portions 3B which can transmit light and are each arranged between the light-absorbing portions. Upon molding and laminating the screen member on a transparent glass substrate to constitute an on-vehicle curved surface screen, the grooves in the adhesive layer release air to prevent generation of residual bubbles. The on-vehicle curved surface screen is used to constitute an on-vehicle display device.

Description

  The present invention relates to an in-vehicle curved screen member with an adhesive layer, an in-vehicle curved screen, and an in-vehicle display device. In particular, an in-vehicle curved screen member with an adhesive layer capable of manufacturing a transparent curved screen with a glass surface touched by a finger while suppressing deterioration in quality due to residual bubbles, an in-vehicle curved screen using the same, and an in-vehicle curved screen The present invention relates to a display device.

With the widespread use of various display devices, display devices are being used in various fields. One of them is the automobile field. In particular, in the automobile field, not only a function of displaying an image is expected, but there is also a strong demand for harmony in the design of the entire automobile. For example, a screen that projects and displays an image for in-vehicle use is expected to have a curved screen instead of a flat surface in order to improve designability (Patent Document 1).
In addition, the in-vehicle display device displays operation buttons for various devices such as a car navigation device, an audio device, and an air conditioner on the screen, and has a touch panel function that enables input operations by touching the operation buttons. A transmissive curved screen that can be used for in-vehicle use, which is expected and has a touch panel function, has been proposed (Patent Document 1).
In addition, touch input operations such as a “flick operation” in which a finger is slid while touching lightly in addition to an operation of simply pressing a finger are becoming more diverse.

JP 2012-32513 A

  However, it has been found that a transmissive curved screen that can be applied to in-vehicle use as disclosed in Patent Document 1 has a poor touch feeling when a finger touches the screen surface. In particular, in the case of in-vehicle use, it is preferable that a certain touch feeling with respect to a finger touching the screen is obtained without gazing at the screen.

  Therefore, the present inventor has found that the touch feeling can be enhanced by using glass having a higher thermal conductivity than the resin for the screen surface. However, unlike resin, glass cannot be curved into a flat plate by thermoforming at a temperature that the resin can withstand. Therefore, an attempt was made to laminate a flat resin sheet provided with a screen element such as a light diffusing layer on a curved glass previously processed into a curved surface at the same time as the curved surface by thermoforming.

  However, unlike the case of laminating flat plates with a pressure roller, air between the glass plate and the resin sheet may not escape and residual bubbles may occur. Residual bubbles are an optical component called a screen compared to a cosmetic application in which a decorative sheet provided with a pattern on an opaque resin sheet is laminated to the curved surface of an article. In this case, since residual bubbles may be seen, the image quality tends to be impaired.

  That is, an object of the present invention is to provide an in-vehicle curved surface screen member with an adhesive layer that can produce a curved in-vehicle curved screen with less residual bubbles, an in-vehicle curved screen and an in-vehicle display device using the same. It is to be.

The vehicle-mounted curved screen member with an adhesive layer, the vehicle-mounted curved screen, and the vehicle-mounted display device according to the present invention have the following configurations.
(1) A vehicle-mounted curved screen member with an adhesive layer used for a vehicle-mounted curved screen that transmits image light incident from the light incident surface side to the light-emitting surface side,
In order from the light emitting surface side, at least,
An adhesive layer;
A light diffusion layer;
A light-absorbing part arranged along the layer surface so as to be able to absorb light, and a light control layer having a light-transmitting part arranged so as to be able to transmit light between the light-absorbing parts,
With
The adhesive layer has a plurality of grooves on the surface,
In-vehicle curved screen member with adhesive layer.
(2) A vehicle-mounted curved screen that transmits image light incident from the light incident surface side to the light exit surface side,
A transparent glass substrate forming the light exit surface;
(1) the in-vehicle curved surface screen member with an adhesive layer laminated on the light incident surface side of the transparent glass substrate;
With
The in-vehicle curved surface screen member with the adhesive layer is laminated on the transparent glass substrate by the adhesive layer.
Curved screen for in-vehicle use.
(3) the vehicle-mounted curved screen of (2),
An image light source disposed on a light incident surface side of the in-vehicle curved screen, and projecting image light on the in-vehicle curved screen;
An infrared light source disposed on a light incident surface side of the in-vehicle curved screen and projecting infrared light to the in-vehicle curved screen;
An infrared light detection unit that is disposed on a light incident surface side of the in-vehicle curved surface screen and detects reflected infrared light reflected from a position of a finger touching the in-vehicle curved screen;
A vehicle-mounted display device comprising:

  According to the present invention, it is possible to provide an in-vehicle curved screen member with an adhesive layer that can produce a curved in-vehicle curved screen with less residual bubbles, an in-vehicle curved screen using the same, and an in-vehicle display device. Can do.

Sectional drawing which shows the basic composition of the vehicle-mounted curved surface screen member with the adhesion layer by this invention. Sectional drawing which shows one Embodiment of the vehicle-mounted curved surface screen member with the adhesion layer by this invention. Sectional drawing which shows the deformation | transformation form of the curved screen member for vehicle-mounted with the adhesion layer by this invention. Sectional drawing which shows the deformation | transformation form of the curved screen member for vehicle-mounted with the adhesion layer by this invention. It is sectional drawing which shows one Embodiment of the vehicle-mounted curved screen by this invention, (a) is a general view, (b) is a partial expanded sectional view. Sectional drawing which shows the modification of the vehicle-mounted curved screen by this invention. Sectional drawing which shows an example of the manufacturing method of the vehicle-mounted curved screen by this invention. Sectional drawing which shows the modification of the vehicle-mounted curved screen by this invention. Sectional drawing which shows one Embodiment of the vehicle-mounted display apparatus by this invention.

    Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the drawings are conceptual diagrams, and the scale relationships, aspect ratios, and the like of components may be exaggerated.

[1] Car-mounted curved screen member with adhesive layer First, the vehicle-mounted curved screen member with adhesive layer according to the present invention will be described.

  FIG. 1 is a cross-sectional view showing an embodiment of an in-vehicle curved screen member 10 with an adhesive layer according to the present invention.

In the present invention, the in-vehicle curved surface screen member 10 with the adhesive layer has at least an adhesive layer 1, a light diffusing layer 2, and a light control layer in order from the light exit surface side Lout, as shown in the sectional view of FIG. 3 and the adhesive layer 1 has a plurality of grooves 1v on the surface.
In the description of the in-vehicle curved screen member 10 with the adhesive layer, the “side to be the light exit surface side Lout” is also simply referred to as “light exit surface side Lout”.

  However, in the present embodiment, the transparent substrate layer 4 and the bonding layer 5 are further included in the sectional view of FIG. Specifically, the in-vehicle curved surface screen member 10 with the adhesive layer includes the adhesive layer 1, the light diffusion layer 2, the bonding layer 5, the light control layer 3, and the transparent base material layer 4 in order from the light exit surface side Lout.

The adhesive layer 1 is a layer for laminating and bonding the in-vehicle curved screen member 10 with an adhesive layer to a curved transparent glass substrate.
The light diffusion layer 2 forms image light and emits it as diffused light to the light exit surface Lout.
The light beam control layer 3 includes a light absorbing portion 3A arranged along the layer surface so as to be able to absorb light, and a light transmitting portion 3B arranged so as to be able to transmit light between the light absorbing portions. The layer surface is the surface of the light diffusion layer 2.
The transparent base material layer 4 functions as a base material at the time of creating the light beam control layer 3, and increases the mechanical strength of the in-vehicle curved screen member 10 with the adhesive layer.
The bonding layer 5 bonds both layers adjacent to each other with the bonding layer 5 interposed therebetween.

  Thus, in this embodiment, since the adhesion layer 1 has the groove | channel 1v in the surface, the vehicle-mounted curved screen member 10 with an adhesion layer is laminated | stacked on the curved-shaped transparent glass base material by the adhesion layer 1, and is used for vehicles. When a curved screen is used, residual bubbles can be made difficult to occur.

  Hereinafter, each layer which comprises the curved surface screen member 10 for vehicle-mounted with an adhesion layer in this embodiment is further demonstrated.

[Adhesive layer 1]
The adhesive layer 1 is a layer for laminating and bonding the in-vehicle curved screen member 10 with an adhesive layer to a curved transparent glass substrate.
The adhesive layer 1 is provided on the light outgoing surface side Lout of the in-vehicle curved surface screen member 10 with the adhesive layer.
The pressure-sensitive adhesive used for forming the pressure-sensitive adhesive layer 1 is not particularly limited as long as it is transparent, and a known pressure-sensitive adhesive can be appropriately used. For example, for the adhesive layer 1, an acrylic adhesive, a silicone adhesive, a polyester adhesive, a rubber adhesive, or the like can be used. In the present invention, as the pressure-sensitive adhesive used for the pressure-sensitive adhesive layer 1, a heat-sealable heat-sensitive adhesive that can be bonded by heating may be used. As the adhesive, known ones such as acrylic resins, polyester resins, urethane resins may be used.
The thickness of the adhesive layer 1 is, for example, about 20 to 100 μm, and usually about 20 to 50 μm.

[Groove 1v]
The adhesive layer 1 has a plurality of grooves 1v on its surface. The groove 1v makes it easy for air between the adhesive layer 1 and the transparent glass substrate to escape to the outside when the vehicle-mounted curved screen member 10 with the adhesive layer is laminated on the curved transparent glass substrate by the adhesive layer 1. It can be made difficult to remain as residual bubbles.
For this reason, it is preferable that the groove | channel 1v is continuously extended to the outer side of the external shape of the transparent glass base material to laminate | stack. The plurality of grooves 1v may independently extend continuously to the outside of the outer shape of the laminated transparent glass substrate, and a part or all of the plurality of grooves 1v are connected to each other. As a result, the plurality of grooves 1v may extend continuously to the outside of the outer shape of the laminated transparent glass substrate.
However, in that it can be applied to a transparent glass substrate of any size, the outer shape of the in-vehicle curved surface screen member 10 with an adhesive layer has a plurality of grooves 1v extending continuously to the outer periphery thereof. It is preferable.
Examples of the plan view pattern drawn by the plurality of grooves 1v include a mesh shape such as a square lattice. An example in which the plurality of grooves 1v are independent of each other is a stripe pattern.
In the plan view shape, the groove 1v may be a straight line, a curved line, or a combination of a straight line and a curved line.

  The groove 1v is formed by softening the adhesive layer 1 by a heating operation or a decompression operation when laminating the in-vehicle curved surface screen member 10 with an adhesive layer on a transparent glass substrate by a curved surface forming method using air pressure described later. Even if the cross-sectional shape of the groove 1v is reduced and disappears, or the air under reduced pressure inside the groove 1v that has been deformed by reduction diffuses into the adhesive layer 1 and does not disappear, it disappears. Moreover, even if it does not disappear, it is only necessary to be in a state that does not cause any trouble in terms of optical performance as the in-vehicle curved screen 20 by being reduced and deformed.

  The groove width of the groove 1v is, for example, 15 to 150 μm. If the groove width is too small, sufficient degassing effect may not be obtained and residual bubbles may be generated. Conversely, if the groove width is too large, an adhesive layer is attached to the transparent glass substrate by a curved surface forming method using air pressure described later. Even if the cross-sectional shape is reduced due to the pressure and heat generated when the in-vehicle curved screen member 10 is laminated, voids due to the grooves 1v may be generated as residual bubbles.

  The depth of the groove 1v is, for example, 50 to 200% with respect to the groove width. If the depth is too small with respect to the groove width, a sufficient degassing effect may not be obtained and residual bubbles may be generated. Conversely, if the depth is too large, residual bubbles may be generated as in the case of the groove width. .

  The interval between the grooves 1v is, for example, 150 μm to 5 mm. Usually, a small interval means that the surface density of the groove 1v is large, and a large interval means that the surface density of the groove 1v is small. If the interval is too small, the groove 1v itself may remain. On the other hand, if the interval is too large, a sufficient degassing effect may not be obtained and residual bubbles may be generated.

  The cross-sectional shape of the groove 1v is not particularly limited, such as a V shape, a triangular shape, a quadrangular shape, a semicircular shape, and a semielliptical shape.

  The cross-sectional shape of the groove 1v, its dimensions, intervals, and the plan view pattern are the curved surface shape and size formed by the laminated surface of the transparent glass substrate, the heating temperature and the degree of pressure reduction during the curved surface molding, and the pressure-sensitive adhesive layer 1 when heated. What is necessary is just to set according to various conditions, such as a flow characteristic.

  The method for forming the pressure-sensitive adhesive layer 1 having the groove 1v is not particularly limited. For example, a release sheet having a release surface having a concave and convex shape opposite to the groove 1v is prepared, and the pressure-sensitive adhesive layer 1 is formed on the release surface of the release sheet. The second release sheet is laminated on the pressure-sensitive adhesive surface of the pressure-sensitive adhesive layer 1 to form a pressure-sensitive adhesive sheet. Then, the second release sheet is peeled from the pressure-sensitive adhesive sheet, and the release layer is peeled off on the surface on which the pressure-sensitive adhesive layer 1 is laminated in the in-vehicle curved surface screen member 10 with the pressure-sensitive adhesive layer. By laminating the sheets together, the pressure-sensitive adhesive layer 1 having grooves 1v on the surface can be formed. The release sheet is laminated on the surface of the pressure-sensitive adhesive layer 1, and the reference sign S indicated by a dotted line in FIG. 1 is the release sheet. The release sheet peels and removes the in-vehicle curved screen member 10 with an adhesive layer when in use.

[Release sheet S]
As the release sheet S, it is possible to use a release surface of a resin sheet such as a polyester-based resin or a polyolefin-based resin in which the groove 1v and the reverse uneven shape are formed. In the present invention, the release sheet S is not indispensable as a component of the in-vehicle curved surface screen member 10 with the adhesive layer, but is provided in that the adhesive layer 1 and its groove 1v can be protected until use. preferable.
In order to make the release surface of the release sheet S have a reverse uneven shape with the groove 1v, the uneven shape may be formed by a hot embossing method on a sheet that has been release-treated with a polyester resin or a polyolefin resin. it can. Or a reverse uneven | corrugated shape can also be formed with the raised printing of an ionizing radiation curable resin with respect to a resin sheet. The release treatment may be a known method such as silicone coating.

[Light diffusion layer 2]
The light diffusing layer 2 is a layer that, when an in-vehicle curved screen is used, the image light incident from the light incident surface side Lin is isotropically diffused and emitted from the light output surface side Lout and delivered to the observer. The light diffusing layer 2 may be made of a known material and a forming method. For example, the light diffusion layer 2 is composed of a base material made of a transparent resin and a diffusion component dispersed in the base material. The light diffusing layer 2 diffuses light isotropically by the difference in refractive index between the base material and the diffusing component or the reflectivity of the diffusing component itself.
In the present invention, the light diffusion layer 2 may have an aspect of anisotropically diffusing light in addition to the aspect of isotropically diffusing light. For example, anisotropic diffusion is performed by adjusting the shape of the diffusion component and the distribution in the base material.

  Examples of the base material include heat such as acrylic resin such as methyl methacrylate-butadiene-styrene copolymer (MBS resin) and methyl methacrylate-styrene copolymer (MS resin), and polycarbonate resin (PC resin). A plastic resin can be used.

  Examples of the diffusion component include resin beads and bubbles. Among them, resin beads are preferable, and those having high transparency are particularly preferable. Examples of such resin beads include acrylic beads, melamine beads, acrylic-styrene beads, polycarbonate beads, polyethylene beads, polystyrene beads, and silicone beads. Among them, acrylic beads are preferable.

The light diffusion layer 2 can be formed, for example, by extruding a resin composition in which the diffusion component is dispersed in the base material. The light diffusion layer 2 can also be prepared in the form of a sheet by extrusion molding.
The thickness of the light diffusion layer 2 is 0.1 to 2 mm, more preferably 0.2 to 1.5 mm. If the thickness is less than this range, the light diffusing ability of the light diffusion layer 2 may be insufficient. If the thickness exceeds this range, the resolution of the displayed image may be deteriorated and blurred.

[Light control layer 3]
The light beam control layer 3 is a layer having a function of appropriately absorbing stray light and external light while controlling the optical path of the image light incident from the light incident surface side Lin. The light beam control layer 3 can improve the contrast of the image. The light beam control layer 3 is provided according to the necessity of optical control. The light control layer 3 may be made of a known material and a forming method.
The light control layer 3 includes a large number of light absorbing portions 3A arranged along the layer surface so as to be able to absorb light, and a light transmitting portion 3B arranged so as to be able to transmit light between the light absorbing portions 3A. Have. In the cross-sectional view of FIG. 1, the light absorbing portions 3 </ b> A extend in a direction perpendicular to the paper surface and are arranged at a constant cycle in the left-right direction on the paper surface. The cross-sectional shape of the light absorbing portion 3A in the present embodiment is an isosceles triangle shape as shown in the figure, and is formed with its base side facing the light exit surface side Lout. Further, in the present embodiment, as shown in the figure, each light transmitting portion 3B between the light absorbing portions 3A is on the apex side of the light absorbing portion 3A having an isosceles triangular shape, and below the apex in the drawing. They are formed by being connected to each other at portions located as continuous layers.
In the present invention, the cross-sectional shape of the light absorbing portion 3A and the cross-sectional shape of the light transmitting portion 3B can take various shapes such as a trapezoidal shape according to the light beam control specifications.
Further, the relationship between the refractive index Na of the light absorbing portion 3A and the refractive index Nb of the light transmitting portion 3B is determined according to the required optical control specifications. Usually, the refractive index difference between the refractive index Na and the refractive index Nb of the light transmitting portion 3B is greater than 0 and 0.06 or less.

(Light absorption part 3A)
The light absorbing portion 3A is composed of light absorbing particles and a binder in which the light absorbing particles are dispersed. The light absorbing particles act to absorb stray light and external light. The light absorbing portion 3A can be formed by a light absorbing portion forming composition in which light absorbing particles are dispersed in a binder.

As the light-absorbing particles, light-absorbing colored particles such as carbon black are preferably used, but the light-absorbing particles are not limited to these, and colored particles that selectively absorb a specific wavelength according to the characteristics of the image light. May be used.
Specific examples of such light absorbing particles include organic fine particles colored with metal salts such as carbon black, graphite and black iron oxide, dyes, pigments, colored glass beads, and the like. In particular, colored organic fine particles are preferable from the viewpoints of cost, quality, availability, and the like. More specifically, acrylic crosslinked fine particles containing carbon black, urethane crosslinked fine particles containing carbon black, and the like are preferable. It is because it is excellent in light absorption and adhesiveness with a binder.

  In addition, in this invention, in order to provide the light absorption part 3A, in order to provide a light absorption effect | action, you may make the whole light absorption part 3A light absorptive with dye other than a light absorption particle.

  As the binder, a resin that is cured by light such as ultraviolet rays is preferable. For example, an acrylate-based ionizing radiation curable resin can be used. Examples of the ionizing radiation curable resin include urethane acrylate, epoxy acrylate, polyester acrylate, polyether acrylate, epoxy acrylate, acrylic acrylate and other acrylate prepolymers, multifunctional acrylate monomers, monofunctional acrylate monomers, vinyl The resin composition which consists of 1 or more types of polymeric compounds, such as a system-type monomer, can be used.

(Light transmission part 3B)
The light transmission part 3B can be comprised from the binder of the component remove | excluding the light absorption particle from the light absorption part formation composition which comprises above-described light absorption part 3A. The binder used may be the same as that of the light absorbing portion 3A.

(Method of forming light absorbing portion 3A and light transmitting portion 3B)
The formation method of 3 A of light absorption parts and the light transmission part 3B is not specifically limited, For example, a well-known formation method is employable suitably. For example, the light absorbing portion 3A is filled with a light absorbing portion forming composition containing colored particles in a groove formed on the surface of the light transmitting portion 3B by a so-called wiping method, while using a doctor blade to transmit excess light. It can be formed by scraping the absorbent portion forming composition.
The groove of the light transmitting portion 3B can be formed by a photopolymer method (also referred to as 2P method) using an ionizing radiation curable resin and a mold. At this time, a cylindrical mold is used as a mold, and the ionizing radiation curable resin is cured in a state where the ionizing radiation curable resin is sandwiched between the mold and the transparent substrate layer 4 to be described later, thereby forming a transparent substrate layer. The light transmission part 3 </ b> B can be continuously formed on 4.

[Transparent substrate layer 4]
The transparent base material layer 4 is a layer used as a base material when forming various layers. In the present embodiment, the transparent substrate layer 4 is used for the light beam control layer 3.
For the transparent base material layer 4, for example, a transparent resin such as a polycarbonate resin, an acrylic resin, triacetyl cellulose (TAC), or a cycloolefin resin can be used. Among these, the polycarbonate-based resin is a kind of resin that is preferable in terms of availability, cost, moldability, heat resistance, adhesion, and the like.

  In the present invention, the transparent substrate layer 4 is not essential and can be omitted. For example, the surface of the transparent substrate layer 4 is made peelable, and after the light control layer 3 is formed on the peelable surface, the light control layer 3 is peeled off from the transparent substrate layer 4, and the transparent substrate layer 4 is adhesive. This is a case where the layered vehicle-mounted curved screen member 10 is not incorporated as a constituent layer.

For the purpose of enhancing the adhesion between the transparent substrate layer 4 and the adjacent layer, the surface of the transparent substrate layer 4 may be subjected to a known adhesion reinforcement treatment such as formation of a primer layer or corona discharge treatment. .
The thickness of the transparent base material layer 4 is set according to the target layer, and is, for example, 25 μm to 5 mm.

[Junction layer 5]
The bonding layer 5 is a layer for bonding the layers on both sides thereof. The bonding layer 5 is provided according to the necessity for bonding.
In the present embodiment, the bonding layer 5 is used for bonding the light diffusion layer 2 and the light control layer 3. The bonding layer 5 can be used as an adhesive layer, an adhesive layer, or the like.
For the bonding layer 5, a thermoplastic resin such as an acrylic resin or a polyester resin, a curable resin such as an epoxy resin, a urethane resin, or an ionizing radiation curable resin can be used.

  In the present invention, the bonding layer 5 can be omitted. For example, the bonding layer 5 between the light diffusion layer 2 and the light control layer 3 when the light diffusion layer 2 is applied to the light control layer 3.

〔Production method〕
In order to manufacture the vehicle-mounted curved screen member 10 with the adhesive layer, it can be manufactured by applying a known transmission screen manufacturing method. For example, in the present embodiment, after the light control layer 3 is formed by the 2P method and the wiping method on the transparent base material layer 4 made of a belt-shaped resin sheet, the bonding layer 5 is formed on the surface of the light control layer 3. The sheet | seat used as the light-diffusion layer 2 is laminated | stacked through the adhesive agent used. Up to this point, the method is the same as that of a known transmissive screen. Next, the pressure-sensitive adhesive layer 1 is applied and formed on the release sheet S having a groove 1v and a reverse uneven surface on the surface of the light diffusing layer 2, and a second mold release is formed on the surface of the pressure-sensitive adhesive layer 1. It can manufacture by peeling and removing the 2nd release sheet from the adhesive sheet which laminated | stacked the sheet | seat, and laminating on the surface of the adhesion layer 1. FIG. The obtained curved in-vehicle screen member 10 with the pressure-sensitive adhesive layer has the release sheet S laminated on the surface of the pressure-sensitive adhesive layer 1, and the release sheet S is peeled off during use.
2 and the subsequent drawings, in the drawings of the in-vehicle curved screen member 10 with the adhesive layer, the release sheet S that protects the surface of the adhesive layer 1 until use can be laminated. The illustration is omitted.

[Deformation]
In the present invention, the in-vehicle curved surface screen member 10 with the adhesive layer can appropriately include other layers in a conventionally known transmission type screen in addition to the layers described in the above embodiment. For example, a reinforcing layer, a Fresnel lens sheet, an antireflection layer, an antistatic layer, a colored layer, and the like.
Hereinafter, the reinforcing layer 6 and the Fresnel lens sheet 7 will be described.

[Reinforcing layer 6]
The in-vehicle curved surface screen member 10 with the adhesive layer of the modified form shown in FIG. 3 is a form in which a reinforcing layer 6 and a bonding layer 5 for laminating the reinforcing layer 6 are further provided in the configuration of FIG. The reinforcement layer 6 is laminated | stacked so that the layer of the light-incidence surface side Lin of the vehicle-mounted curved screen member 10 with an adhesion layer may be comprised. Since the bonding layer 5 has already been described, the reinforcing layer 6 will be described here.

The reinforcing layer 6 increases the rigidity of the in-vehicle curved surface screen member 10 with the adhesive layer, and during the manufacturing process of the in-vehicle curved surface screen member 10 with the adhesive layer before being laminated on the transparent glass substrate, This can be prevented when the curved screen member 10 is deformed unintentionally and the handling and quality are disturbed.
The material of the reinforcing layer 6 is a transparent resin such as polycarbonate resin (PC resin), methyl methacrylate-butadiene-styrene copolymer (MBS resin), methyl methacrylate-styrene copolymer (MS resin), or the like. An acrylic resin can be used.
The thickness of the reinforcement layer 6 can be 3-5 mm, for example. If the thickness is too thick, the transmittance of the image light may decrease, or a ghost (double image) may occur, resulting in a decrease in optical performance.

  In order to manufacture the in-vehicle curved surface screen member 10 with the adhesive layer configured as shown in FIG. 3, for example, in the manufacturing method described in the above embodiment, the reinforcing layer 6 is formed through the bonding layer 5 and the light control layer 3 is formed. It can manufacture by carrying out adhesion lamination on the transparent base material layer 4 used as a base material.

[Fresnel lens sheet 7]
The curved surface member 10 with a pressure-sensitive adhesive layer with an adhesive layer shown in FIG. 4 further includes a Fresnel lens sheet 7 and a bonding layer 5 for laminating the Fresnel lens sheet 7 in addition to the configuration of FIG. is there. The Fresnel lens sheet 7 is laminated so as to constitute a layer on the light incident surface side Lin of the in-vehicle curved screen member 10 with the adhesive layer.
Since the bonding layer 5 has already been described, the Fresnel lens sheet 7 will be described here.

  By providing the Fresnel lens sheet 7, the degree of freedom of the position of the image light source for projecting image light can be increased with respect to the in-vehicle curved screen 10 created using the in-vehicle curved screen member 10 with the adhesive layer.

  The Fresnel lens sheet 7 is a sheet in which a Fresnel lens layer 8 is formed on the transparent substrate layer 4.

(Transparent substrate layer 4)
The transparent base material layer 4 is a layer that becomes a base material for forming the Fresnel lens layer 8. Since the transparent substrate layer 4 has already been described, the description thereof is omitted.

  In the present invention, the transparent substrate layer 4 is not essential for the Fresnel lens layer 8. The transparent base material layer 4 adjacent to the Fresnel lens layer 8 may be omitted, and the Fresnel lens sheet 7 including only the Fresnel lens layer 8 may be used. For example, although not shown, the Fresnel lens layer 8 is laminated directly adjacent to the reinforcing layer 6. Such a configuration is formed, for example, by using the reinforcing layer 6 instead of the base material when forming the Fresnel lens layer 8.

(Fresnel lens layer 8)
The Fresnel lens layer 8 is a layer constituting a Fresnel lens by including a plurality of unit lenses. The Fresnel lens layer 8 emits the image light incident from the light incident surface side Lin as a divergent light beam from the image light source on the observer side of the in-vehicle curved screen made using the in-vehicle curved screen member 10 with the adhesive layer. It is converted into a parallel light beam traveling toward the surface side Lout. The Fresnel lens layer 8 converts the image light into a light beam substantially perpendicular to the screen surface, thereby suppressing unevenness in image brightness.
The Fresnel lens layer 8 is a circular Fresnel lens in which unit lenses are arranged concentrically or arcuately according to the positional relationship between the in-vehicle curved screen produced using the in-vehicle curved screen member 10 with the adhesive layer and the image light source. Alternatively, a linear Fresnel lens in which linearly extending unit lenses are arranged in parallel may be used.

The Fresnel lens layer 8 may be made of a known material and a forming method.
The Fresnel lens layer 8 is made of a transparent resin. As the transparent resin, for example, an acrylic resin, a styrene resin, a polyester resin, a polycarbonate resin, an acrylic-styrene copolymer resin, or the like can be used.

The method for forming the Fresnel lens layer 8 is not particularly limited. For example, the Fresnel lens layer 8 can be formed by forming a unit lens on the transparent base material layer 4 by the photopolymer method (2P method) in the same manner as the light transmitting portion 3B described above. For example, if an acrylate ionizing radiation curable resin is used and formed by a photopolymer method, the Fresnel lens layer 8 made of an acrylic resin is formed.

  To manufacture the in-vehicle curved surface screen member 10 with the adhesive layer having the configuration shown in FIG. 4, for example, the Fresnel lens sheet 7 is bonded to the reinforcing layer 6 via the bonding layer 5 with respect to the configuration shown in FIG. 3. Further, it can be manufactured by adhesive lamination.

[2] Car-mounted curved screen Next, the vehicle-mounted curved screen according to the present invention will be described.

FIG. 5 is a cross-sectional view schematically showing an embodiment of the in-vehicle curved surface screen 20 according to the present invention. FIG. 5A is an overall view, and FIG. 5B is a partially enlarged cross-sectional view.
Hereinafter, in the cross-sectional view showing only the in-vehicle curved surface screen 20, what is originally a curved surface shape is drawn two-dimensionally for convenience.

The in-vehicle curved surface screen 20 transmits the image light incident from the light incident surface side Lin on the back surface and emits it to the light output surface side Lout on the front surface.
In the present invention, as shown in the cross-sectional view of FIG. 5B, the in-vehicle curved surface screen 20 is at least in order from the light exit surface side Lout, the transparent glass substrate 9, the adhesive layer 1, the light diffusion layer 2, and the light beam. A control layer 3 is provided.
Constituent elements other than the transparent glass substrate 9, in this case, the adhesive layer 1, the light diffusing layer 2, and the light control layer 3 are provided by the in-vehicle curved screen member 10 with the adhesive layer.
However, the adhesive layer 1 does not necessarily have the surface groove 1v that the adhesive layer 1 has in the state of the in-vehicle curved screen member 10 with the adhesive layer. This is because the vehicle-mounted curved screen 20 may disappear due to the pressure, heat, and reduced pressure environment applied during manufacture, or may be small enough not to affect the optical performance. Therefore, the groove 1v is not drawn in the drawing.

[What is a curved surface?]
In the present embodiment, the “curved surface” formed by the surface of the in-car curved screen 20 is a “three-dimensional curved surface”. More specifically, in the present embodiment, the three-dimensional curved surface is a part of the spherical surface of the sphere.
In the present invention, the “curved surface” may be a “two-dimensional curved surface” in addition to the “three-dimensional curved surface”. In an application where an in-vehicle display device using the in-vehicle curved screen 20 is installed, “three-dimensional curved surface” and “two-dimensional curved surface” are properly used from the viewpoint of design and a sense of unity of overall design. .
“Three-dimensional curved surface” means a surface that is partially or wholly bent around a plurality of mutually inclined axes. The “three-dimensional curved surface” is not limited to a spherical surface, but may be an elliptical sphere, a curved surface whose section forms a parabola, or a curved surface of a combination thereof.
“Two-dimensional curved surface” means a surface that is bent two-dimensionally around a single axis.
The “curved surface” may be a combined curved surface of “three-dimensional curved surface” and “two-dimensional curved surface”.
Whether the convex side of the “curved surface” is the light exit surface side Lout or the light entrance surface side Lin is arbitrary. In the present embodiment, as shown in FIG. 1, the convex side of the “curved surface” is the light exit surface side Lout.
In the present invention, the radius of curvature of the “curved surface” depends on the application and design properties, but can be, for example, 200 cm or less, more specifically 25 to 150 cm.
Moreover, in a local case etc., a curvature radius can be 1-25 cm.

  Hereinafter, each layer which comprises the vehicle-mounted curved screen 20 in this embodiment is further demonstrated.

[Transparent glass substrate 9]
The transparent glass substrate 9 is a substrate composed of inorganic glass. Therefore, the transparent glass substrate 9 is not a substrate made of resin glass composed of a resin such as a polycarbonate resin or an acrylic resin. The polycarbonate resin has a thermal conductivity of 0.19 [W / (m · K)], and the acrylic resin has a thermal conductivity of 0.20 [W / (m · K)], whereas transparent glass Although depending on the material, the thermal conductivity of the inorganic glass constituting the substrate 9 is about 1.0 [W / (m · K)], about 5 times as large. For this reason, when the finger is brought into contact with the light emitting surface, the amount of heat exchanged by the finger is larger than that of the resin, and as a result, it is considered that the touch feeling when the finger touches the surface is strengthened.

The thickness of the transparent glass substrate 9 may be a thickness according to the application and required physical properties. However, in order to utilize the mechanical strength and the thermal conductivity that are larger than those of the resin material, the thicker one is preferable. preferable. For example, the thickness of the transparent glass substrate 9 can be set to 1 to 6 mm. This is because if the thickness is too thin, the mechanical strength and the touch feeling may be lowered, and if the thickness is too thick, excessive performance is obtained, and it is against the trend of weight reduction for in-vehicle use.

  As the transparent glass substrate 9, a vehicle-mounted curved screen member 10 with an adhesive layer and a curved surface shape from the stage before lamination are used. A flat glass substrate 9 is used as the transparent glass substrate 9, and an in-vehicle curved screen member 10 with an adhesive layer is formed on the curved surface member 10 with an adhesive layer laminated thereon and then formed into a predetermined curved surface shape. This is because it cannot be molded unless the temperature is higher than the heat resistance temperature of the resin such as the pressure-sensitive adhesive layer 1, the light diffusion layer 2, and the light control layer 3.

[Constituent elements of the in-vehicle curved surface screen member 10 with an adhesive layer]
An in-vehicle curved screen 20 shown in FIG. 5 (b) shows a basic configuration, and is a constituent element other than the transparent glass substrate 9, specifically, in the case of the same figure, an adhesive layer 1, a light diffusion layer 2, and a light control layer. 3 is a component formed by the vehicle-mounted curved screen member 10 with an adhesive layer.

In the present embodiment, the components formed by the in-vehicle curved surface screen member 10 with the adhesive layer can include further components in addition to the components shown in FIG.
Furthermore, the effect demonstrated with the corresponding curved surface member 10 for vehicle-mounted curved screens with an adhesion layer can be acquired with the component provided.
Hereinafter, the transparent base material layer 4, the bonding layer 5, the reinforcing layer 6, and the Fresnel lens sheet 7 will be described. These have already been described in the in-vehicle curved surface screen member 10 with the adhesive layer. Therefore, here, the vehicle-mounted curved screen 20 in a state where these layers are laminated will be described in correspondence with the vehicle-mounted curved screen member 10 with the adhesive layer.

For example, it is the transparent base material layer 4 and the joining layer 5 which were demonstrated in FIG. 2 as embodiment of the vehicle-mounted curved surface screen member 10 with an adhesion layer.
The in-vehicle curved screen 20 shown in FIG. 6A corresponds to the in-vehicle curved screen member 10 with the adhesive layer shown in FIG. 2, and the in-vehicle curved screen member 10 with the adhesive layer shown in FIG. In this configuration, the adhesive layer 1 is laminated on the transparent glass substrate 9.

Further, the in-vehicle curved screen 20 can include the reinforcing layer 6.
The in-vehicle curved screen 20 shown in FIG. 6B corresponds to the in-vehicle curved screen member 10 with the adhesive layer shown in FIG. 3, and the in-vehicle curved screen member 10 with the adhesive layer shown in FIG. In this configuration, the adhesive layer 1 is laminated on the transparent glass substrate 9.

The in-vehicle curved screen 20 can include the Fresnel lens sheet 7.
The in-vehicle curved screen 20 shown in FIG. 6C corresponds to the in-vehicle curved screen member 10 with the adhesive layer shown in FIG. 4, and the in-vehicle curved screen member 10 with the adhesive layer shown in FIG. In this configuration, the adhesive layer 1 is laminated on the transparent glass substrate 9.

〔Production method〕
In the present invention including this embodiment, the method for manufacturing the in-vehicle curved screen 20 is not particularly limited, and for example, a known method can be appropriately employed.
In FIG. 7, an example of the manufacturing method of the vehicle-mounted curved screen 20 is shown. First, as shown in FIG. 7A, a transparent glass substrate 9 having a predetermined curved surface shape is first prepared. The transparent glass substrate 9 having this curved surface is placed on the mold surface of the mold M. The mold surface has a curved surface on the convex side of the transparent glass substrate 9 and a curved surface having a reverse uneven shape. For this reason, even if a molding pressure is applied to the transparent glass substrate 9 during the molding to be performed in the future, the transparent glass substrate 9 is not damaged.
And after mounting the transparent glass base material 9 on a type | mold surface, on the transparent glass base material 9, the vehicle-mounted curved surface screen member 10 with the flat adhesive layer which is not yet shape | molded by the curved surface of the adhesive layer 1 is provided. Place the side facing the transparent glass substrate 9.

Next, as shown in FIG. 7 (b), the in-vehicle curved surface screen member 10 with an adhesive layer is formed into a curved surface so as to follow the curved surface of the transparent glass substrate 9, and is adhered and laminated. As the curved surface forming method at this time, for example, a known curved surface forming method using air pressure such as vacuum forming, pressure forming, or vacuum / pressure forming can be employed. The in-vehicle curved surface screen member 10 with a pressure-sensitive adhesive layer that is in the form of a flat plate or a flat sheet is heated to a deformable temperature or more and deformed by a difference in air pressure, and is adhered and laminated on the joint surface that forms the curved surface of the transparent glass substrate 9. Is done.
In curved surface molding using air pressure, air is not left as residual bubbles between the bonding surface of the transparent glass substrate 9 and the adhesive layer 1 which is the bonding surface of the in-vehicle curved screen member 10 with the adhesive layer. Is that after both the space on the lower side of the molding die M side of the in-vehicle curved screen member 10 with the adhesive layer and the upper space of the in-vehicle curved screen member 10 with the adhesive layer are decompressed, It is preferable to adopt a molding method in which decompression of the space is released and further pressurization is required. This is because air between the bonding surface of the transparent glass substrate 9 and the pressure-sensitive adhesive layer 1 which is the bonding surface of the in-vehicle curved screen member 10 with the pressure-sensitive adhesive layer can be easily released by the decompression operation and the groove 1v. .
After forming the curved surface, if the excess portion around the in-vehicle curved surface screen member 10 with the adhesive layer is cut and removed, the curved surface screen for in-vehicle use having a predetermined outer shape as shown in FIG. 7C. 20 is obtained.

  In FIG. 7 corresponding to the present embodiment, the mold surface of the mold M is concave, but in the present invention, curved surface molding with a convex surface is also possible.

Specific examples of known curved surface forming methods using air pressure include, for example, an overlay method (see Japanese Patent Publication No. 56-45768, Japanese Patent Laid-Open No. 4-36837), a vacuum press method (Japanese Patent Publication No. 60-58014). No. 4, JP-A-4-368837, etc.).
The overlay method is sometimes referred to as a vacuum laminating method, and the vacuum pressing method is also referred to as a membrane pressing method because it uses deformation pressure of a rubber-like elastic film such as a silicone rubber sheet in addition to air pressure.

  If the transparent glass substrate 9 is called an adherend, and the in-vehicle curved screen member 10 with an adhesive layer is called a molding sheet, both the overlay method and the vacuum press method face or mount the molding sheet on the adherend. The molding sheet is laminated on the adherend by a pressure difference caused by vacuum suction from the adherend side. The vacuum press method is similar to the overlay method, but in addition to the pressure difference of air, the contraction force (contraction pressure) of a rubber-like elastic film is also used as an elastic film for pressing the molding sheet against the adherend. Different.

[Effect in this embodiment]
Thus, in this embodiment, it can be set as the curved surface screen 20 for curved surfaces in which the quality deterioration by a residual bubble does not produce easily.
Moreover, since the surface of the light exit surface side Lout is formed by the transparent glass substrate 9, the touch when the finger touches the screen as compared with the conventional transparent resin substrate such as polycarbonate resin or acrylic resin. A feeling can be strengthened. As a result, the curved screen 20 for in-vehicle use suitable for in-vehicle use can be obtained.

[Deformation]
In the present invention, the vehicle-mounted curved screen 20 can appropriately include other layers in a conventionally known transmission type screen in addition to the layers described in the above embodiment. For example, the Fresnel lens sheet 7 whose direction is changed, an antireflection layer, an antistatic layer, a colored layer, and the like.

(Reverse configuration of Fresnel lens sheet 7)
The Fresnel lens sheet 7 may overlap the lens surface toward the light output surface side Lout, as in the in-vehicle curved screen 20 shown in FIG.
In this case, the Fresnel lens sheet 7 is a part of the constituent layers of the curved surface screen 20 for in-vehicle use, but is not intimately laminated and integrated, that is, the constituent layer that is not intimately fixed on the surface facing the other layers. It has become. Accordingly, the bonding layer 5 for closely laminating the Fresnel lens sheet 7 is not necessary.
The Fresnel lens sheet 7 that is not tightly fixed on the surface facing the other layer is integrated as a whole on-vehicle curved screen 20 by, for example, fixing the peripheral portion with a metal clip. It can be used as a member.

In the form in which the Fresnel lens sheet 7 is not tightly fixed on the surface facing the other layers, the Fresnel lens sheet 7 and other portions can be prepared separately. For example, the Fresnel lens sheet 7 can be prepared in accordance with the position of the image light source, and the parts other than the Fresnel lens sheet 7 can be prepared in accordance with the required image quality. These can be combined according to the specifications.
Further, at the time of curved surface molding, the Fresnel lens sheet 7 and a portion other than the Fresnel lens sheet 7 can be separately curved surface molded. In the curved surface molding of the Fresnel lens sheet 7, it is preferable to mold the Fresnel lens layer 8 in such a direction as not to contact the mold surface of the mold, so that the degree of molding freedom can be increased.

[3] In-vehicle display device Next, the in-vehicle display device according to the present invention will be described.

  FIG. 9 is a cross-sectional view schematically showing an embodiment of the in-vehicle display device 100 according to the present invention. FIG. 9A shows the in-vehicle display device 100, FIG. 9B is a drawing in which the in-vehicle curved screen 20 in FIG. 9A is extracted, and FIG. 9C is the in-vehicle display device. 3 is a cross-sectional view showing a basic layer configuration of a curved screen 20 for use.

Next, an in-vehicle display device 100 according to the present invention will be described with reference to an embodiment shown in FIG.
The vehicle-mounted display device 100 according to the present invention includes the vehicle-mounted curved screen 20 according to the present invention described above as a transmissive curved screen. More specifically, the in-vehicle display device 100 according to the present invention includes the above-described in-vehicle curved screen 20 according to the present invention,
An image light source 31 that is disposed on a light incident surface Lin of the vehicle-mounted curved screen 20 and projects the image light Lv on the vehicle-mounted curved screen 20;
An infrared light source 32S that is disposed on the light incident surface Lin of the in-vehicle curved surface screen 20 and projects the infrared light Lr on the in-vehicle curved surface screen 20;
An infrared light detection unit 32D that is disposed on the light incident surface Lin of the vehicle-mounted curved screen 20 and detects reflected infrared light Lr reflected from the position of the finger F that has touched the vehicle-mounted curved screen 20;
Is provided.
The infrared light source 32 </ b> S and the infrared light detection unit 32 </ b> D serve as a contact position detection sensor 32 that detects the position of the finger F that has touched the screen surface of the in-vehicle curved surface screen 20.
Furthermore, in this embodiment shown in the figure, a housing 33 is provided for storing them and fixing them in a predetermined positional relationship.

  Thus, since the screen surface of the light exit surface side Lout of the curved surface screen 20 for vehicles is formed by the transparent glass base material 9, it is heat | fever compared with transparent resin base materials, such as the conventional polycarbonate resin and acrylic resin. Since the conductivity is large, it is possible to enhance the touch feeling when a finger touches the screen. As a result, it is possible to obtain a screen suitable for in-vehicle touch input that requires a certain touch feeling when a finger touches the screen.

  Hereinafter, each component which comprises the vehicle-mounted display apparatus 100 is further demonstrated.

[Car-mounted curved screen 20]
Since the vehicle-mounted curved screen 20 has already been described, further description is omitted here.
FIG. 9C shows the basic configuration of the vehicle-mounted curved screen 20, and various components can be adopted as the component parts provided by the vehicle-mounted curved screen member 10 with the adhesive layer as already described.

[Video light source 31]
The image light source 31 is not particularly limited as long as the image light Lv can be projected onto the vehicle-mounted curved screen 20. For example, the image light source 31 is a liquid crystal display (LCD), an EL (electroluminescence) display, a digital micromirror device (DMD), or the like.

[Contact position detection sensor 32]
The contact position detection sensor 32 includes an infrared light source 32 </ b> S and an infrared light detection unit 32 </ b> D that are disposed together on the light incident surface side Lin of the in-vehicle curved surface screen 20.

[Infrared light source 32S]
The infrared light source 32S is composed of a light emitting diode (LED), for example, and is disposed in the vicinity of the video light source 31 as shown in FIG. The infrared light Lr emitted from the infrared light source 32S follows an optical path substantially the same as the diverging optical path of the image light Lv from the image light source 31 toward the light incident surface Lin of the in-vehicle curved screen 20, and the in-vehicle curved surface. The light enters the entire area of the light incident surface Lin of the screen 20.

The infrared light Lr that has reached the in-vehicle curved screen 20 is transmitted through the in-vehicle curved screen 20 and emitted from the light exit surface Lout, similarly to the image light Lv. At this time, in the portion where the human finger F is in contact with the light exit surface of the in-vehicle curved surface screen 20, the infrared light Lr that is emitted from or is about to exit from the light exit surface is reflected by the finger F, and again for in-vehicle use. The light travels through the curved screen 20 toward the light incident surface Lin and exits from the light incident surface.
Will go on.

[Infrared light detection unit 32D]
The infrared light detection unit 32D is configured by, for example, a two-dimensional image sensor such as a CCD camera that can selectively detect the infrared light Lr.
Then, the CCD camera of the infrared light detection unit 32D detects the contact position of the finger F using the reflected infrared light Lr reflected by the finger F and emitted from the light incident surface as a two-dimensional image.
The infrared light detection unit 32D is disposed in the vicinity of the image light source 31 and the infrared light source 32S, as shown in FIG. 9A, and is generally on the light incident surface side of the in-vehicle curved screen 20 from the infrared light source 32S. The reflected infrared light Lr traveling along the optical path opposite to the diverging optical path of the infrared light Lr toward Lin can be received.

  As a result, the in-vehicle display device 100 has a function as a curved touch panel by applying the contact position detection sensor 32 including the infrared light source 32S and the infrared light detection unit 32D to the in-vehicle curved screen 20.

  The infrared light detection unit 32D reads the position information of the detected infrared light in addition to a CCD camera or the like that detects the infrared light itself, and for example, to which button among the operation buttons displayed on the screen. A known position information calculation unit that detects whether the finger F is in contact is included.

  Currently, various types of touch panels such as a resistive film type, a capacitance type, and an optical type are in widespread use, but the type adopted in the present invention is an optical type. However, as a general optical method, an infrared light source and an infrared light detection unit are arranged on the operator side of the display surface, that is, the finger side, and a direct infrared light Lr blocking position by the finger is set. It is to detect. That is, this is an optical system in which a detection sensor is arranged on the light exit surface side Lout. However, in the optical system of this type, it is impossible to distribute light by causing the infrared light Lr to travel along the curved surface in the present invention in which the touch surface is a curved surface. Not applicable. On the other hand, the method employed in the present invention is a method in which a contact position detection sensor 32 including an infrared light source 32S and an infrared light detection unit 32D is arranged on the light incident surface side Lin and is detected by reflected light. Therefore, there is an advantage that the position can be detected even if the touch surface is a curved surface. In addition, it is possible to cope with a so-called multi-touch function that can simultaneously detect a plurality of contact positions separated from each other.

[Case 33]
The housing 33 can be made of a material suitable for the application, such as resin or metal. In the present invention, the housing 33 can be omitted. For example, it is a case where components other than the housing | casing 33 are assembled | attached in the dashboard of a motor vehicle. However, the provision of the housing 33 can improve maintenance such as component replacement.

[Effect in this embodiment]
Thus, in this embodiment, it can be set as the vehicle-mounted display apparatus 100 which has the curved vehicle-mounted curved screen 20 in which the quality deterioration by a residual bubble does not produce easily.
Moreover, since the screen surface is formed by the transparent glass substrate 9, the finger F touches the screen as compared with the case where the screen surface is formed by a transparent resin substrate such as polycarbonate resin or acrylic resin. Touch feeling can be strengthened. As a result, the in-vehicle display device 100 suitable for in-vehicle use can be obtained.

DESCRIPTION OF SYMBOLS 1 Adhesion layer 1v Groove 2 Light diffusion layer 3 Light control layer 3A Light absorption part 3B Light transmission part 4 Transparent base material layer 5 Bonding layers (adhesion layer, adhesion layer, etc.)
DESCRIPTION OF SYMBOLS 6 Reinforcement layer 7 Fresnel lens sheet 8 Fresnel lens layer 9 Transparent glass base material 10 Carved curved screen member with adhesive layer 20 Carved curved screen 31 Video light source 32 Contact position detection sensor 32D Infrared light detection unit 32S Infrared light source 33 Housing Body 100 Display device for vehicle F Finger Lin Light incident surface side Lout Light emission surface side Lr Infrared light, reflected infrared light Lv Image light S Release sheet

Claims (3)

A vehicle-mounted curved screen member with an adhesive layer used for a vehicle-mounted curved screen that transmits image light incident from the light incident surface side to the light-emitting surface side,
In order from the light emitting surface side, at least,
An adhesive layer;
A light diffusion layer;
A light-absorbing part arranged along the layer surface so as to be able to absorb light, and a light control layer having a light-transmitting part arranged so as to be able to transmit light between the light-absorbing parts,
With
The adhesive layer has a plurality of grooves on the surface,
In-vehicle curved screen member with adhesive layer. An in-vehicle curved screen that transmits image light incident from the light incident surface side to the light exit surface side,
A transparent glass substrate forming the light exit surface;
The in-vehicle curved surface screen member with an adhesive layer according to claim 1 laminated on the light incident surface side of the transparent glass substrate,
With
The in-vehicle curved surface screen member with the adhesive layer is laminated on the transparent glass substrate by the adhesive layer.
Curved screen for in-vehicle use. An in-vehicle curved screen according to claim 2;
An image light source disposed on a light incident surface side of the in-vehicle curved screen, and projecting image light on the in-vehicle curved screen;
An infrared light source disposed on a light incident surface side of the in-vehicle curved screen and projecting infrared light to the in-vehicle curved screen;
An infrared light detection unit that is disposed on a light incident surface side of the in-vehicle curved surface screen and detects reflected infrared light reflected from a position of a finger touching the in-vehicle curved screen;
A vehicle-mounted display device comprising: