JP6922181B2 - Viewing angle control member, display device - Google Patents

Description

The present invention relates to a viewing angle control member that controls a viewing angle of an image, and relates to a viewing angle control member that can be easily attached to and detached from an image display surface, and a display device including the same.

In recent years, the portability of terminal devices has improved, and their screens have also become larger. With the improvement of portability of such terminal devices, the chances of seeing the screen in a public place increase, and the concern of peeping increases.

In order to prevent such peeping, for example, a technique as described in Patent Document 1 is disclosed. According to this, by alternately arranging the portion that transmits light and the portion that absorbs light, it is possible to limit the viewing angle and prevent peeping.
However, since such a viewing angle control sheet absorbs a part of the image light, the image tends to be darkened by all means.

On the other hand, for example, Non-Patent Document 1 and Non-Patent Document 2 disclose a technique for attaching and detaching a filter.

Japanese Unexamined Patent Publication No. 2006-171700

http://www2.elecom.co.jp/products/EF-PFS116W.html http://www2.elecom.co.jp/products/PM-A15LFLGMPF.html

However, in the technique described in Patent Document 1, although the film that prevents peeping can be attached and detached, the adhesive strength of the adhesive tape is reduced by repeating the attachment and detachment, and the adhesive tape is continuously attached. There was a problem that it could not be attached, and there was a problem in the convenience when reattaching the filter after removing it.

Further, although the technique described in Patent Document 2 can be reattached, it is not assumed that the film is used by switching between the state in which the film is attached and the state in which the film is peeled off.

Therefore, in view of the above problems, it is an object of the present invention to provide a viewing angle control member that can be used by easily switching between a state of being mounted on an image display surface and a state of being detached from the image display surface. do. In addition, a display device including this is provided.

Hereinafter, the present invention will be described.

One aspect of the present invention has a sheet-shaped viewing angle control sheet that limits the viewing angle of incident light and emits it, and a fixing member that is arranged so as to project from the edge of the viewing angle control sheet and is fixed. The member includes an adhesive portion on which an adhesive is arranged, and a non-adhesive portion on which the adhesive is not arranged is formed between the adhesive portion and the edge of the viewing angle control sheet. Is.

Here, the viewing angle control sheet has a transparent base material layer and a viewing angle control layer arranged on one surface of the base material layer, and the viewing angle control layer is a light transmitting portion that transmits light. It is also possible to have a configuration in which the light absorbing portion and the light absorbing portion that absorbs light are alternately arranged in the direction along the layer surface.

Further, a part of the viewing angle control layer may be provided with a portion that does not limit the viewing angle.

Further, the display device main body provided with the image display surface and the viewing angle control member are provided, and the viewing angle control sheet of the viewing angle control member can be attached to and detached from the image display surface of the display device main body without sticking. Provided is a display device in which the viewing angle control member is fixed to the display device main body by attaching the adhesive portion of the fixing member of the viewing angle control sheet to a part of the display device main body other than the image display surface. be able to.

According to the present invention, it is a viewing angle control member capable of easily switching between a state of being attached to an image display surface of a display device main body such as a mobile terminal and a state of being detached from the image display surface display surface.

FIG. 1A is a plan view of the viewing angle control member 10, and FIG. 1B is a bottom view of the viewing angle control member 10. It is sectional drawing of the viewing angle control member 10. It is an enlarged view of a part of the cross section of the viewing angle control sheet 11. It is a figure explaining the fixing member 20. FIG. 5A is a plan view of the display device 5 in a scene where the viewing angle control member 10 is attached to the display device main body 1, and FIG. 5B is a bottom view of the display device 5. 6 (a) is a view seen from the direction indicated by the arrow Va in FIG. 5 (a), and FIG. 6 (b) is a view for explaining different postures of the viewing angle control member 10. It is a figure explaining another posture of a display device 5. It is a figure explaining the viewing angle control member 10'of a modification.

Hereinafter, the present invention will be described based on the form shown in the drawings. However, the present invention is not limited to these forms. In these drawings, even if the element is minute or thinly formed, it may be deformed or enlarged for the sake of clarity, and when the same element is repeatedly arranged, a part of the code is shown. May be omitted.

FIG. 1 is a diagram illustrating one form, and is an external view of a viewing angle control member 10. FIG. 1A is a plan view, and FIG. 1B is a bottom view. Further, FIG. 2 shows a cross-sectional view of the viewing angle control member 10 when cut along the line shown by II-II in FIG.

As can be seen from FIG. 2, the viewing angle control member 10 includes a viewing angle control sheet 11 and a fixing member 20.

The viewing angle control sheet 11 includes a base material layer 12 and a viewing angle control layer 13. Among them, in particular, the viewing angle control layer 13 changes the traveling direction of the light incident from the incoming light side and emits it from the outgoing light side, as described later, and intensively improves the brightness in the front direction (normal direction). It has a function to make it (condensing function), which limits the viewing angle.
FIG. 3 shows an enlarged part of the viewing angle control sheet 11 in FIG.

As can be seen from FIGS. 1 to 3, the base material layer 12 is a flat sheet-like translucent member that supports the viewing angle control layer 13.
Various materials can be used as the material forming the base material layer 12. However, a material that is widely used as a material for an optical sheet used in a display device or the like, has excellent mechanical properties, optical properties, stability, workability, and the like, and can be obtained at low cost can be used. Examples thereof include polyethylene terephthalate (PET) resin, triacetyl cellulose (TAC) resin, methacrylic resin, polycarbonate resin and the like. Among these, it is preferable to use a TAC resin, a methacrylic resin, or a polycarbonate resin having less birefringence. Further, it can be configured to have high heat resistance assuming an environment placed in a vehicle, and in that case, a polycarbonate resin having a high glass transition point is desirable. Specifically, the glass transition point of the polycarbonate resin is as high as 143 ° C.

The thickness of the base material layer 12 is not particularly limited, but is preferably 25 μm or more and 300 μm or less. If the thickness of the base material layer 12 is out of this range, there is a risk of causing a problem in processability. For example, when the base material layer 12 is thinner than 25 μm, wrinkles are likely to occur. Further, if the base material layer 12 is thicker than 300 μm, it may be difficult to wind the base layer 13 after laminating the viewing angle control layer 13 at the time of manufacturing.

The viewing angle control layer 13 is a layer laminated on one surface of the base material layer 12, and light transmitting portions 14 and light absorbing portions 15 are alternately arranged along the layer surface.

In the present embodiment, the viewing angle control layer 13 has a cross section shown in FIG. 3 and has a shape extending to the back / front side of the paper surface. That is, in the cross section shown in FIG. 3, a light transmitting portion 14 having a substantially trapezoidal shape and a light absorbing portion 15 having a substantially trapezoidal cross section formed between two adjacent light transmitting portions 14 are provided.

The light transmitting portion 14 is a portion whose main function is to transmit light. In this embodiment, in the cross sections shown in FIGS. 2 and 3, a long lower bottom is on the base material layer 12 side and a short upper bottom is on the opposite side. It is an element having a substantially trapezoidal cross-sectional shape. A plurality of light transmitting portions 14 are arranged along the layer surface of the base material layer 12 while maintaining the cross section and having an interval in a direction different from the extending direction. An interval having a substantially trapezoidal cross section is formed between the adjacent light transmitting portions 14. Therefore, the interval has a trapezoidal cross section having a long lower base on the upper bottom side of the light transmitting portion 14 and a short upper base on the lower bottom side of the light transmitting portion 14, and the necessary materials described later are described here. The light absorbing portion 14 is formed by filling. In this embodiment, the adjacent light transmitting portions 14 are connected by a base portion 13a on the long lower bottom side.

The light transmitting portion 14 has a refractive index of Nt. Such a light transmitting portion 14 can be formed by curing the composition constituting the transmitting portion. Details will be described later. The value of the refractive index Nt is not particularly limited, but the refractive index is preferably 1.55 or more. However, since a material having an excessively high refractive index is often fragile, the refractive index is preferably 1.61 or less. More preferably, it is 1.56 or less.

The light absorbing portion 15 functions as an intersection formed at the above-mentioned intervals formed between the adjacent light transmitting portions 14, and has a cross-sectional shape similar to the cross-sectional shape of the intervals. Therefore, the short upper base faces the base material layer 12 side, and the long lower base faces the opposite side. The light absorbing unit 15 has a refractive index of Nr and is configured to be able to absorb light. Specifically, the light absorbing particles are dispersed in a binder having a refractive index of Nr. The refractive index Nr is preferably lower than the refractive index Nt of the light transmitting portion 14. By making the refractive index of the light absorbing unit 15 smaller than the refractive index of the light transmitting unit 14, the light incident on the light transmitting unit 14 under predetermined conditions can be appropriately totally reflected at the interface with the light absorbing unit 15. .. Further, even if the total reflection condition is not satisfied, some light is reflected at the interface. This makes it possible to increase the brightness of the image provided to the observer. The value of the refractive index Nr is not particularly limited, but is preferably 1.50 or less from the viewpoint of appropriately performing the total reflection, and more preferably 1.47 or more from the viewpoint of availability. More preferably, it is 1.49 or more.
However, the present invention is not limited to this, and the refractive index of the light absorbing unit 15 may be equal to or higher than the refractive index of the light transmitting unit 14. According to this, a large amount of light can be absorbed by the light absorbing unit 14 without being totally reflected. Therefore, the light provided to the observer becomes dark, but the viewing angle can be narrowed.

The difference in the refractive index between the refractive index Nt of the light transmitting unit 14 and the refractive index Nr of the light absorbing unit 15 is not particularly limited, but total reflection by the interface between the light transmitting unit 14 and the light absorbing unit 15 is used. When the brightness in the front direction is improved, the difference in refractive index is preferably 0.05 or more and 0.14 or less. By increasing the difference in refractive index, more light can be totally reflected.

The viewing angle control 13 is not particularly limited, but for example, the light transmitting portion 14 and the light absorbing portion 15 are formed as follows. That is, the pitch of the light transmitting portion 14 and the light absorbing portion 15 represented by _{Pk in FIG. 3 is preferably 20 μm or more and 100 μm or less. Further, the angle formed by the interface between the light transmitting portion 14 and the light absorbing portion 15 shown by θ k} in FIG. 4 and the normal of the layer surface of the viewing angle control layer 13 is 0 ° or more and 10 ° or less. Is preferable. When θ _k is 0 °, the light transmitting portion 14 and the light absorbing portion 15 are rectangular or square.
_{The thickness of the light absorbing portion 14 shown by D k} in FIG. 3 is preferably 50 μm or more and 150 μm or less. Within these ranges, it is easy to balance light transmission and light absorption.

In this embodiment, an example is shown in which the interface between the light transmitting portion 14 and the light absorbing portion 15 is linear in the cross section, but the present invention is not limited to this, and the interface is not limited to this, but may be a polygonal line, a convex curved surface, a concave curved surface, or the like. May be good. Further, the plurality of light transmitting portions 14 and the light absorbing portions 15 may have the same cross-sectional shape, or may have different cross-sectional shapes with predetermined regularity.

Further, the thickness of the viewing angle control sheet 11 is preferably 300 μm or more and 500 μm or less as a whole. If the viewing angle control sheet 11 is thinner than 300 μm, the stiffness may be insufficient and a problem may occur in bending during use. Further, if it is thicker than 500 μm, there is a possibility that the operation function by the touch panel of the display device main body (mobile terminal or the like) to which the viewing angle control member 10 is applied may be hindered.

It is preferable that the viewing angle control sheet 11 is not provided with an adhesive or other material that is easily adsorbed on other members on the surface thereof. This makes it easier to separate the viewing angle control sheet 11 from the image display surface of the display device main body.

The viewing angle control sheet 11 can be manufactured, for example, as follows.
First, the light transmitting portion 14 is formed on one surface of the base material layer 12. This inserts a base material sheet to be a base material layer 12 between a mold roll having a shape on the surface on which the shape of the light transmitting portion 14 can be transferred and a nip roll arranged so as to face the mold roll. At this time, the mold roll and the nip roll are rotated while supplying the composition constituting the light transmitting portion between the base sheet and the mold roll. As a result, the groove corresponding to the light transmitting portion (the shape obtained by reversing the shape of the light transmitting portion) formed on the surface of the mold roll is filled with the composition constituting the light transmitting portion, and the composition is formed on the surface of the mold roll. It follows the shape.

Here, examples of the composition constituting the light transmitting portion include ionizing radiation curable resins such as epoxy acrylate-based, urethane acrylate-based, polyether acrylate-based, polyester acrylate-based, and polythiol-based resins.

The composition sandwiched between the mold roll and the base sheet and forming the light transmitting portion filled therein is irradiated with light for curing by a light irradiation device from the base sheet side. Thereby, the composition can be cured and its shape can be fixed. Then, the base material layer 12 and the molded light transmitting portion 14 are released from the mold roll by the mold release roll.

Next, the light absorption unit 15 is formed. In order to form the light absorbing portion 15, first, the composition constituting the light absorbing portion is filled in the space between the formed adjacent light transmitting portions 14. Then, the excess composition is scraped off with a doctor blade or the like. Then, the remaining composition can be cured by irradiating the remaining composition with ultraviolet rays from the light transmitting portion 14 side to form the light absorbing portion 15.

The material used as the light absorbing portion is not particularly limited, but is colored in a photocurable resin such as urethane (meth) acrylate, polyester (meth) acrylate, epoxy (meth) acrylate, and butadiene (meth) acrylate. Examples thereof include a composition in which the light absorbing particles are dispersed.

Further, instead of dispersing the light absorbing particles, the entire light absorbing portion can be colored with a pigment or a dye.
When light absorbing particles are used, light absorbing colored particles such as carbon black are preferably used, but the present invention is not limited to these, and specific wavelengths are selectively absorbed according to the characteristics of image light. Colored particles may be used. Specific examples thereof include organic fine particles colored with metal salts such as carbon black, graphite and black iron oxide, dyes and pigments, and colored glass beads. In particular, colored organic fine particles are preferably used from the viewpoints of cost, quality, availability, and the like. The average particle size of the colored particles is preferably 1.0 μm or more and 20 μm or less.

As a result, the viewing angle control sheet 11 in which the viewing angle control layer 13 is formed on one surface of the base material layer 12 is produced.

Returning to FIGS. 1 and 2, the fixing member 20 will be described. The fixing member 20 is a member for fixing the viewing angle control sheet 11 to the target display device main body to form the display device. By fixing the viewing angle control sheet 11, the viewing angle control sheet 11 can be easily attached to and detached from the image display surface of the display device main body. FIG. 4 shows an enlarged view focusing on the portion of one of the fixing members 20 in FIG. 1 (b). Specifically, the fixing member 20 of the present embodiment includes a connecting member 21 and an adhesive portion 22.

The connecting member 21 is a member that connects the viewing angle control sheet 11 and the display device main body 1 (see FIG. 5 and the like) to which the viewing angle control member 10 is attached, and is a rectangular strip-shaped sheet in this embodiment. The material of the sheet is not particularly limited, but for example, the same material as the base material layer of the viewing angle control sheet 11 can be used.
As can be clearly seen from FIGS. 1B and 4, one end of the connecting member 21 is fixed to the viewing angle control sheet 11, and the other end is arranged so as to project from the edge of the viewing angle control sheet 11. NS.

The width of the connecting member 21 (the size in the direction orthogonal to the direction in which the connecting member protrudes from the viewing angle control sheet 11, the size in the vertical direction of the paper surface in FIG. 4) can be appropriately set depending on the number of the fixing members 20 arranged. For example, when one fixing member 20 is arranged, the width can be increased, and when a plurality of fixing members 20 are arranged, the width of each fixing member 20 can be decreased.
The thickness of the connecting member 21 is not particularly limited, but is preferably 25 μm or more and 200 μm or less. If the thickness is thinner than 25 μm, it is easily broken, and if it is thicker than 200 μm, the force to return when bent becomes strong, and there is a risk that it becomes difficult to bend.
The length of the connecting member 21 can be appropriately designed according to the thickness of the display device main body to be applied. It is preferable that at least the non-adhesive portion 20a described later is configured to be at least the thickness of the display device main body.

The adhesive portion 22 is an adhesive portion for adhering the connecting member 21 to the display device main body 1 and holding the viewing angle control member 10 on the display device main body 1. As a result, it becomes the display device 5. Such an adhesive portion 22 is arranged on the other end side of the surface of the connecting member 21 opposite to one end fixed to the viewing angle control sheet 11. Here, the adhesive portion 22 is arranged on the front and back surfaces of the viewing angle control sheet 11 on the side in contact with the display device main body 1. As a result, the viewing angle control member 10 can be appropriately fixed to the display device main body 1.

The material constituting the adhesive portion 22 is not particularly limited, and known adhesives and adhesives can be used. As a more specific example, it is preferable to use an acrylic pressure-sensitive adhesive as the pressure-sensitive adhesive portion 22. The thickness thereof is preferably 10 μm or more and 50 μm or less. If it is thinner than 10 μm, the sticking is weak and there is a risk that it will be easily peeled off. Further, if it is thicker than 50 μm, the adhesive and the adhesive are likely to squeeze out, and if they squeeze out, stains are generated.

Here, as shown by G in FIG. 4, the fixing member 20 is arranged on the viewing angle control sheet 11, and the fixing member 20 is extended in a direction away from the viewing angle control sheet 11, and the viewing angle control sheet 11 is extended. A non-adhesive portion 20a in which no adhesive is arranged is formed between the edge of the adhesive portion 22 and the adhesive portion 22. The distance is not particularly limited, but it is preferably equal to or slightly larger than the thickness of the terminal on which the viewing angle control member 10 is arranged, and from this viewpoint, it is preferably 5 mm or more and 30 mm or less. As a result, as will be described later, when the viewing angle control member 10 is attached to the display device main body 1, the viewing angle control sheet 11 can be more easily attached to and detached from the display device main body 1.

Two such fixing members 20 are arranged in this embodiment. However, the number is not particularly limited, and one or more may be arranged.

Next, the operation of the viewing angle control member 10 having the above configuration will be described with reference to an optical path example and the like. However, the optical path example shown here is a conceptual one for explanation, and does not strictly represent the degree of reflection or refraction.

In FIGS. 5 (a), 5 (b), and 6 (a), the viewing angle control member 10 is arranged on the display device main body 1 to form the display device 5, and the viewing angle is restricted. The figure is shown. Here, the display device main body 1 is a portable terminal device (so-called smartphone or tablet terminal), and has a plate shape as a whole and has an image display surface on at least one surface thereof.
5 (a) is a plan view, FIG. 5 (b) is a bottom view, and FIG. 6 (a) is a view seen from the direction of the arrow shown by Va in FIG. 5 (a).
Further, in FIG. 5A, the light absorbing portion 15 is represented by a line on the surface of the viewing angle control member 10 for the sake of clarity. Therefore, in this example, the light transmitting portion 14 and the light absorbing portion 15 extend in the vertical direction of the paper surface, and the light transmitting portion 14 and the light absorbing portion 15 are alternately arranged in the horizontal direction of the paper surface.

As can be seen from FIGS. 5 (a), 5 (b), and 6 (a), when the viewing angle is limited by the display device 5, the viewing angle control sheet 11 is displayed on the image display surface of the display device main body 1. Arrange so that they overlap with each other. At this time, when the cross section of the light transmitting portion 14 is trapezoidal, it is preferable to arrange the light transmitting portion 14 so that the short upper bottom side of the light transmitting portion 14 faces the image display surface side of the display device main body 1.
Then, the connecting member 21 of the fixing member 20 is made to wrap around along the edge of the display device main body 1, and the end portion (the other end) of the fixing member 20 on which the adhesive portion 22 is arranged is on the back side of the display device main body. It is arranged on (the surface opposite to the image surface), and the adhesive portion 22 is fixed to the back surface of the display device main body 1. As a result, the viewing angle control member 10 is held by the display device main body 1 and becomes the display device 5.

In such a posture, the light emitted from the display device main body 1 is incident on the viewing angle control layer 13 as shown in FIG. Then, the light incident on the viewing angle control layer 13 travels with the following optical paths, for example.
For example, the image light shown by L31 in FIG. 3 passes through the light transmitting portion 14 without reaching the interface between the light transmitting portion 14 and the light absorbing portion 15. Since such image light is originally light that travels in the front direction of the image display surface and does not become the image light to be peeked at, there is no need to limit the image light, and such image light is not absorbed by the observer. It is visually recognized.
The image light shown by L32 in FIG. 3 reaches the interface between the light transmitting portion 14 and the light absorbing portion 15, is totally reflected, and is transmitted through the light transmitting portion 14. At this time, due to the action of the inclination angle (θ _k ) of the interface, the light reflected at the interface is brought closer to the direction parallel to the normal of the image display surface of the display device main body 1 (the front direction of the image display surface). Further, even if the light is not totally reflected because the angle is smaller than the total reflection critical angle, some of the light is reflected at the interface. Since such light is directed in the front direction by being changed in direction, it becomes an image light that is not a target of peeping.
Further, the image light shown by L33 in FIG. 3 is light that travels in a direction that further spreads with respect to the front surface, but since this is absorbed by the light absorption unit 15, it is not a target for peeping.

On the other hand, as shown by L34 in FIG. 3, the light incident from the observer side at a large angle with respect to the sheet surface normal is absorbed by the light absorption unit 15. As a result, a part of the external light is absorbed, so that the contrast can be improved.

With such a viewing angle control member 10, in the present embodiment, the image light from the display device main body 1 that is the target of peeping by an adjacent person in the left-right direction is suppressed, and the peeping can be performed efficiently. Can be prevented.

From the viewing angle control posture (peep prevention posture) described above, as shown by the dotted line arrow in FIG. 6A, the viewing angle control sheet 11 is rotated around the fixing member 20 so as to turn the page. Finally, as shown in FIG. 6B, the viewing angle control sheet 11 is detached from the image display surface of the display device main body 1. In the present embodiment, the viewing angle control sheet 11 is rotated to the back side of the display device main body 1, but this is not always the case.
According to such a posture, the image emitted from the display device main body 1 is not limited in the viewing angle, and the image is emitted in a wide range. According to this, a brighter image can be seen, and an image emitted from the display device main body 1 can be seen together with another person.

When it is desired to control the viewing angle again, the viewing angle control sheet 11 may be rotated so as to go back to the above, and the viewing angle control sheet 11 may be arranged so as to overlap the image display surface of the display device main body 1.

The viewing angle control member 10 is provided with a non-adhesive portion between one end fixed to the viewing angle control sheet 11 of the fixing member 20 and the adhesive portion 22 fixed to the display device main body 1. As a result, when the display device 5 is used, the viewing angle control member 10 can be stably arranged on the image display surface of the display device main body 1 while holding the viewing angle control member 10 in the display device main body 1. It is possible to easily switch between a posture in which the viewing angle is controlled to prevent peeping and a posture in which the viewing angle control member 10 is separated from the image display surface of the display device main body 1.

Further, in that case, since the viewing angle control sheet 11 can be held by the display device main body 1 without providing a special element for adsorbing the viewing angle control sheet 11 on the image display surface of the display device main body 1. It is possible to perform stable and repeated switching easily.

FIG. 7 shows a scene in which the display device 5 is placed so that the longitudinal direction of the display device main body 1 is horizontal. In this case, in this embodiment, the direction in which the light transmitting portion and the light absorbing portion extend is horizontal, and the direction in which the light transmitting portion and the light absorbing portion are alternately arranged is vertical.
According to this, the viewing angle restriction direction is the vertical direction. Therefore, by arranging in this way in the car, it is possible to block the upward light, and it is possible to prevent the image from being reflected on the windshield. Even in this case, the viewing angle control sheet 11 can be attached and detached in the same manner as described above.

FIG. 8 is a diagram for explaining the viewing angle control member 10'corresponding to the modified example. The viewing angle control member 10'is different from the viewing angle control member 10 in that a part of the viewing angle control sheet 11 is provided with a portion 11a that does not control the viewing angle.
This portion 11a is arranged at a position corresponding to a sensor, a microphone, a speaker, a camera lens, etc. included in the display device main body. As a result, the function of the display device main body 1 can be exhibited without being hindered.
The specific form for not controlling the viewing angle is not particularly limited, but a hole is formed in this portion, the viewing angle control layer is not provided (only the base material layer is used), and light absorption is not provided. And so on.

1 Display device body 5 Display device 10, 10'Viewing angle control member 11 Viewing angle control sheet 12 Base material layer 13 Viewing angle control layer 14 Light transmitting part 15 Light absorbing part 20 Fixed member 20a Non-adhesive part 21 Connecting member 22 Adhesive part

Claims (4)

A quadrangular sheet-like shape in a plan view that limits the viewing angle of incident light and emits it, and a viewing angle control sheet with a thickness of 300 μm or more and 500 μm or less.
Anda fixing member Ru der than 200μm or less 25μm only be disposed so as to protrude from the thick one side of said square of said view angle controlling sheet,
The fixing member is provided with an adhesive portion on which an adhesive is arranged.
A viewing angle control member in which a non-adhesive portion on which an adhesive is not arranged is formed between the adhesive portion and the side of the viewing angle control sheet. The viewing angle control sheet is
It has a transparent base material layer and a viewing angle control layer arranged on one surface of the base material layer.
The viewing angle control member according to claim 1, wherein the viewing angle control layer is a light transmitting portion that transmits light and a light absorbing portion that absorbs light are arranged alternately in a direction along a layer surface. The viewing angle control member according to claim 1 or 2, wherein a portion of the viewing angle control layer is provided with a portion that does not limit the viewing angle. A display device body equipped with an image display surface and
The viewing angle control member according to any one of claims 1 to 3 is provided.
The viewing angle control sheet of the viewing angle control member is detachably arranged with respect to the image display surface of the display device main body without sticking.
A display device in which the viewing angle control member is fixed to the display device main body by attaching the adhesive portion of the fixing member of the viewing angle control sheet to a portion of the display device main body other than the image display surface. ..

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