JP7304283B2 - Louver film, louver film link, louver film laminate - Google Patents

Description

TECHNICAL FIELD The present invention relates to a louver film, a connected louver film and a louver film laminate.

In recent years, at night, light sources such as light emitting diodes (LEDs) are used to illuminate a part of the outside (outer surface) of a building or facilities such as windows installed on the outer wall to promote the existence of the building. It is done. By illuminating the buildings in this way, it is possible to create a night view of the city and produce a three-dimensional effect and aesthetic effects of the buildings that cannot be seen in the daytime. Further, indirect lighting is performed by applying light from a light source to facilities provided inside (indoors) of a building.

For example, in order to emphasize the three-dimensional effect of a building, it is desirable to illuminate only a predetermined portion of the building. In order to apply light only to a predetermined portion, it is necessary to improve the directivity of the light emitted from the light source.

Conventionally, as a structure for enhancing directivity, for example, a sheet-like viewing angle control body having a louver layer in which a plurality of light transmission bands and light blocking bands are alternately provided is known (for example, patent Reference 1).

WO2018/225714

However, the viewing angle control body of Patent Document 1 cannot be applied to a large light source because it is difficult to increase the area and length.

An object of the present invention is to provide a louver film, a louver film connected body, and a louver film laminate, which can be made large and long and can be applied to a large light source.

[1] A louver film having a louver film body in which a plurality of light transmission bands and a plurality of light shielding bands are alternately provided, the louver film bodies being used by being engaged with each other, wherein the louver film body A louver film having engaging portions at arbitrary positions on the periphery.
[2] The engaging portion comprises an engaging convex portion and an engaging concave portion, the louver film body is rectangular, has the engaging convex portion on one short side of the louver film body, and has the engaging convex portion. The louver film according to [1], which has the engaging recess on the other short side of the louver film body.
[3] When two louver film bodies are engaged with each other, the pitch between the light transmission band and the light shielding band in the engaging projections of one of the louver film bodies and the engagement of the other louver film body The louver film according to [2], wherein the pitch of the light-transmitting band and the light-shielding band in the recess are equal.
[4] The louver film according to any one of [1] to [3], comprising a transparent protective layer on at least one surface of the louver film body.

[5] A first louver film having a first engaging portion and a second louver film having a second engaging portion, wherein the first louver film and the second louver film , wherein the first engaging portion of the first louver film and the second engaging portion of the second louver film are engaged with each other. A louvred film tie having a mating tie.
[6] The louver film connection body according to [5], wherein the first louver film and the second louver film are in close contact at the connecting portion.
[7] The louver film connecting body according to [5] or [6], wherein the first engaging portion and the second engaging portion have connecting regions that fit together.
[8] The angle formed by the thickness direction of the first louver film in the first engaging portion and the center line drawn in the direction from the light incident side to the light emitting side of the light blocking band; [5] to [7], wherein the angle formed by the thickness direction of the second louver film in the engaging portion of 2 and the center line drawn in the direction from the light incident side to the light emitting side of the light blocking band is equal. ] The louver film connection body in any one of ].
[9] The angle formed by the thickness direction of the first louver film in the first engaging portion and the center line drawn in the direction from the light incident side to the light emitting side of the light blocking band; [5] to [7], wherein the angle formed by the thickness direction of the second louver film in the engaging portion of 2 and the center line drawn in the direction from the light incident side to the light emitting side of the light blocking band is different. ] The louver film connection body in any one of ].
[10] The pitch of the light transmission band and the light shielding band in the first engaging portion is equal to the pitch of the light transmission band and the light shielding band in the second engaging portion, [5] to [9] ] The louver film connection body in any one of ].
[11] The pitch of the light transmission band and the light shielding band in the first engaging portion is different from the pitch of the light transmission band and the light shielding band in the second engaging portion, [5] to [9] ] The louver film connection body in any one of ].
[12] The louver film assembly according to any one of [5] to [11], wherein the thickness of the first louver film and the thickness of the second louver film are equal.
[13] The louver film assembly according to any one of [5] to [11], wherein the thickness of the first louver film and the thickness of the second louver film are different.
[14] The louver film assembly according to any one of [5] to [13], wherein each of the first louver film and the second louver film has a transparent protective layer on at least one surface thereof.

[15] A louver according to any one of [5] to [13], comprising a transparent base material and a louver film connecting body disposed on one surface of the transparent base material. A louver film laminate, which is a film connecting body.
[16] The louver film laminate according to [15], wherein each of the first louver film and the second louver film has a transparent protective layer on the surface opposite to the surface in contact with the transparent substrate. .

According to the present invention, it is possible to provide a louver film, a louver film connected body, and a louver film laminate that can be made large and long and that can be applied to a large light source.

It is a top view showing a louver film which is one embodiment to which the present invention is applied. FIG. 2 is a cross-sectional view taken along line AA of FIG. 1; FIG. 4 is a plan view showing another example of the engaging portion of the louver film, which is one embodiment to which the present invention is applied; FIG. 4 is a plan view showing another example of the engaging portion of the louver film, which is one embodiment to which the present invention is applied; FIG. 4 is a plan view showing another example of the engaging portion of the louver film, which is one embodiment to which the present invention is applied; FIG. 4 is a plan view showing another example of the engaging portion of the louver film, which is one embodiment to which the present invention is applied; FIG. 4 is a plan view showing another example of the engaging portion of the louver film, which is one embodiment to which the present invention is applied; FIG. 4 is a plan view showing another example of the engaging portion of the louver film, which is one embodiment to which the present invention is applied; 1 is a perspective view showing a cutting step in a method for manufacturing a louver film, which is an embodiment to which the present invention is applied; FIG. 1 is a plan view showing a louver film connecting body as an embodiment to which the present invention is applied; FIG. FIG. 11 is a cross-sectional view taken along line BB of FIG. 10; It is a sectional view showing a louver film connection object which is one embodiment to which the present invention is applied. It is a top view showing a louver film which is one embodiment to which the present invention is applied. It is a top view showing a louver film which is one embodiment to which the present invention is applied. It is a perspective view showing a louver film which is one embodiment to which the present invention is applied. It is a perspective view showing a louver film which is one embodiment to which the present invention is applied. It is a perspective view showing a louver film which is one embodiment to which the present invention is applied. It is a perspective view showing a louver film which is one embodiment to which the present invention is applied.

<First Embodiment>
(louver film)
A louver film according to a first embodiment of the present invention will be described.
FIG. 1 is a plan view showing the louver film of this embodiment. FIG. 2 is a cross-sectional view along line AA in FIG.
The louver film 1 of this embodiment includes a louver film body 10 in which a plurality of light transmission bands 11 and a plurality of light shielding bands 12 are alternately provided. A plurality of light-transmitting bands 11 and a plurality of light-shielding bands 12 are provided parallel to the width direction of the louver film body 10 . The louver film body 10 (louver film 1) is used by being engaged with each other. Also, the louver film 1 is provided on the surface (light emission surface) of a light source such as a light emitting diode (LED) via a diffusion layer or the like for diffusing light from the light source.

The louver film body 10 has engaging portions 15 at arbitrary positions on its periphery. In the louver film 1 of the present embodiment, as shown in FIG. 1, the louver film body 10 has a rectangular shape, and has engaging portions 15 on one short side 10a and the other short side 10b of the louver film body 10. .

In this embodiment, the longitudinal direction of the louver film 1 (louver film main body 10) is the X direction (perpendicular to the paper surface in FIG. 1), and the lateral direction of the louver film 1 (louver film main body 10) is the horizontal direction (in FIG. 1, the paper surface). ) is the Y direction, and the direction perpendicular to the surface of the louver film 1 (louver film body 10) (that is, the thickness direction of the louver film 1 (louver film body 10)) is the Z direction.

The engaging portion 15 of the louver film body 10 consists of an engaging convex portion 16 and an engaging concave portion 17 . In the louver film 1 of this embodiment, as shown in FIG. 17.

In this embodiment, as shown in FIG. 1, the engaging projection 16 has a trapezoidal shape in plan view. Further, the engaging recess 17 has a trapezoidal shape in plan view. The engaging convex portion 16 and the engaging concave portion 17 are shaped to fit each other in plan view. That is, the area surrounded by the engagement projection 16 and the engagement recess 17 have substantially the same shape. The portions of the engaging protrusions 16 and the engaging recesses 17 that are shaped to fit each other are connecting regions that connect one louver film 1 (1A) and the other louver film 1 (1B). Therefore, by engaging the engaging protrusions 16 of one louver film 1 (1A) with the engaging recesses 17 of the other louver film 1 (1B), the engaging protrusions 16 and the engaging recesses 17 are aligned. are closely related. That is, the engaging convex portion 16 and the engaging concave portion 17 are closely attached without a gap.

As a method for confirming that the engaging projection 16 and the engaging recess 17 are in close contact, for example, the boundary between the engaging projection 16 and the engaging recess 17 and the portion of the louver film 1 other than the boundary are checked. and a method of measuring light transmittance. When the light transmittance at the boundary is substantially equal to the light transmittance at the portion of the louver film 1 other than the boundary, it can be said that the engaging convex portion 16 and the engaging concave portion 17 are in close contact with each other. That is, it is possible to suppress the leakage of light at the boundary between the engaging convex portion 16 and the engaging concave portion 17 .
The value of the light transmittance in this specification is the light source D65 defined in JIS Z 8720, and the intensity of the inspection light emitted from the light source is measured by a light receiving sensor. A is the output value of the light receiving sensor when there is no object to be measured, and B is the output value when the light transmitted through the object is received by the light receiving sensor after the object is set on the optical path of the inspection light. , the value obtained by light transmittance = (B/A) x 100 (unit: %).

When the two louver film bodies 10A and 10B are engaged with each other, that is, when the engaging projections 16 of one louver film body 10A are engaged with the engaging recesses 17 of the other louver film body 10B, one The pitch between the light transmission band 11 and the light shielding band 12 (the interval between the light transmission band 11 and the light shielding band 12) in the engaging convex portion 16 of the louver film body 10A and the light transmission band in the engaging concave portion 17 of the other louver film body 10B. The pitches of 11 and shading bands 12 may be different or equal. When the direction (directivity) of the light transmitted through the two louver films 1A and 1B that are connected together is made constant, the light transmission band 11 and the light shielding at the engaging convex portion 16 of one of the louver film main bodies 10A. It is preferable that the pitch of the band 12 be the same as the pitch of the light transmitting band 11 and the light shielding band 12 in the engaging recess 17 of the other louver film main body 10B. In addition, when the direction (directivity) of the light transmitted through the two louver films 1A and 1B that are connected as a whole is different, the light transmission band 11 and the light shielding at the engaging convex portion 16 of one of the louver film main bodies 10A. It is preferable to change the pitch of the strips 12 and the pitch of the light transmitting strips 11 and the light shielding strips 12 in the engaging recesses 17 of the other louver film main body 10B.

In addition, the rectangle in this embodiment should just be a rectangle in outline shape of an outer shape. For example, at least one of the square right corners of the rectangle may be chamfered. Also, a notch may be formed in any portion of the periphery of the rectangle, or a protruding portion that partially protrudes from a side of the rectangle may be formed. Also, the sides of the rectangle may be partially non-linear (for example, curved, zigzag, etc.).

The light transmittance of the entire louver film 1 is preferably 45% or more, more preferably 55% or more. Specifically, the light transmittance is preferably 45% or more and 100% or less, more preferably 55% or more and 100% or less. In addition, the light transmittance of the entire louver film 1 is the average value of five randomly selected locations on the louver film 1 .

As shown in FIG. 2, the louver film 1 of the present embodiment includes a first end region 1a including one end in the longitudinal direction of the louver film 1 (one short side 10a of the louver film main body 10), and a louver A second end region 1b including the other end in the longitudinal direction of the film 1 (the other short side 10b of the louver film body 10), and a second end region 1b formed between the first end region 1a and the second end region 1b. and a central region 1c. As will be described later, in the first end region 1a, the second end region 1b, and the central region 1c, in the thickness direction of the louver film 1 and in the direction from the light incident side to the light emitting side of the light shielding band 12, The angle formed by the drawn center line (installation angle of the light shielding band 12) may be different or may be the same. The installation angles of the light shielding bands 12 in the first end region 1a, the second end region 1b, and the central region 1c are determined according to the directivity of light required for the louver film 1 (directivity of light transmitted through the louver film 1). adjusted accordingly.

The installation angle of the light-shielding band 12 is set from the light-incident side of the light-shielding band 12 toward the light-exiting side with reference to the light-emitting surface of the louver film body 10 in a cross-sectional photograph of the louver film 1 or the louver film body 10 alone. A digital protractor can be used to measure the acute angle between the center line drawn in the direction and the vertical direction of the surface of the louver film 1 .
The installation angle of the light shielding belt 12 is a value obtained by measuring the installation angles of five light shielding belts 12 selected at random by the above installation angle measurement method, and averaging the obtained values.

As shown in this embodiment, each of the first end region 1a, the second end region 1b and the central region 1c is preferably rectangular in plan view.
The width Wa of the first end region 1a, the width Wb of the second end region 1b, and the width Wc of the central region 1c are the directivity of light required for the louver film 1 (directivity of light transmitted through the louver film 1). adjusted accordingly.
In this specification, fine "length", "thickness", and "width" are measured with a measuring microscope for any 10 locations, and the measured values are averaged. is the value

The length of the louver film 1 in the longitudinal direction is not limited, and is, for example, 120 mm or more and 1500 mm or less. The length of the louver film 1 in the lateral direction is not limited, and is, for example, 25 mm or more and 200 mm or less.

(Louver film body)
The louver film body 10 includes a plurality of linear light transmission bands 11 and linear light shielding bands 12, and the light transmission bands 11 and the light shielding bands 12 are alternately and repeatedly arranged. In this embodiment, the light transmission band 11 and the light shielding band 12 are formed along the Y direction.
In this embodiment, the width of each light transmission band 11 and the width of each light shielding band 12 are both constant in their longitudinal direction. The term "constant" as used herein includes a range within ±5% of the design value of the width. Further, all the light transmission bands 11 have the same width, and all the light shielding bands 12 have the same width. However, the "same" width in the present invention allows for some differences. In the light transmission zone 11, a range within ±10% of the width of the light transmission zone 11 located in the center is also included in the “same” range. A range within ±10% of the width is also included in "same". The "width" is the length in the X direction of the light transmission zone 11 or the light shielding zone 12 on the surface of the louver film main body 10 on the light exit side.

In the louver film body 10, from the viewpoint of controlling the directivity of the light transmitted through the louver film body 10 in an arbitrary direction, the average value of the widths of the plurality of light transmission bands 11 is preferably 50 μm or more and 200 μm or less. It is more preferably 100 μm or more and 150 μm or less. For the same reason, the average width of the plurality of light shielding bands 12 is preferably 1 μm or more and 50 μm or less, more preferably 10 μm or more and 30 μm or less.
The width of each of the plurality of light transmission bands 11 is preferably 50 μm or more and 200 μm or less, more preferably 100 μm or more and 150 μm or less. For the same reason, the width of each of the light shielding bands 12 is preferably 1 μm or more and 50 μm or less, more preferably 10 μm or more and 30 μm or less.

The thickness of the louver film body 10 in this embodiment is constant. The term "constant" as used herein includes a range within ±5% of the design value of the thickness. Also, the “thickness” is the length of the louver film main body 10 in the Z direction. The thickness of the louver film body 10 can be obtained by measuring a cross-sectional photograph of the louver film 1 or the louver film body 10 alone, and is the average value of the values obtained by measuring 10 or more points.
The thickness of the louver film body 10 is preferably 100 μm or more and 5000 μm or less, more preferably 120 μm or more and 1000 μm or less, and even more preferably 150 μm or more and 500 μm or less.
If the thickness of the louver film main body 10 is within the above range, the directivity of the light transmitted through the louver film main body 10 can be easily adjusted, and the louver film main body 10 can be easily manufactured.

[Light transmission band]
As a material for forming the light transmission band 11, a resin material that transmits the target wavelength of visible light is used. The wavelength of light transmitted through the light transmission band 11 may be the entire visible light range of 380 nm or more and 830 nm or less, or may be a part thereof.
As the resin material constituting the light transmission band 11, a highly transparent thermoplastic resin or thermosetting resin is used. Examples include vinyl resins, acrylic resins, and polycarbonate resins. Among these, silicone resins are preferable, and silicone rubbers are more preferable because of their high flexibility, heat resistance and transparency.

Silicone rubbers include, for example, silicone rubber compositions generally called millable rubbers, which are composed of diorganopolysiloxane whose molecular chain ends are blocked with hydroxysilyl groups or vinylsilyl groups and organic peroxides; A so-called addition reaction in which an organohydrogenpolysiloxane having at least three silicon-bonded hydrogen atoms (i.e., SiH bonds) in the molecule and a platinum-based catalyst are blended with a diorganopolysiloxane having at least two vinyl groups. type of organosilicone rubber composition, and the like.
The light transmission band 11 preferably has a light transmittance of 75% or more, more preferably 85% or more when light is incident only on the light transmission band 11 along the Z direction. Specifically, the light transmittance is preferably 75% or more and 100% or less, more preferably 85% or more and 100% or less.

[Shading zone]
As a material for forming the light-shielding band 12, a colored resin is used in which a resin material forming the light-transmitting band 11 is used as a base material and a coloring agent such as a pigment or a dye is added to the base material. The resin material contained in the light shielding band 12 can be the same as the resin material contained in the light transmission band 11 . The resin material contained in the light shielding band 12 may be the same as or different from the resin material contained in the light transmitting band 11 . The resin material contained in the light-transmitting band 12 is preferably the same as the resin material contained in the light-transmitting band 11 in order to increase the adhesiveness between the light-transmitting band 11 and the light-shielding band 12 .

The color tone of the light-shielding band 12 may be black, red, yellow, green, blue, light blue, etc., as long as the light-shielding band 12 has a preferable light-shielding property. The color tone of the light shielding band 12 can be adjusted by the type and amount of coloring agent added. Since the color tone of the light shielding band 12 constitutes the color tone that can be recognized when looking at the louver film body 10, it is preferable to design the louver film 1 in consideration of the design.

The light-shielding band 12 preferably has a light transmittance of 40% or less, more preferably 10% or less when light is incident only on the light-shielding band 12 along the Z direction. Specifically, the light transmittance is preferably 0% or more and 40% or less, more preferably 0% or more and 10% or less. With such a light transmittance, it has sufficient light shielding properties.

Specific examples of the colorant contained in the light shielding band 12 include general organic pigments such as carbon black, iron oxide, titanium oxide, yellow iron oxide, disazo yellow, and phthalocyanine blue, or inorganic pigments. Colorants may be used singly or in combination of two or more.
When a black pigment is not used as a coloring agent, it is preferable to use a white pigment in combination in order to ensure light-shielding properties.

According to the louver film 1 of the present embodiment, by using the louver film bodies 10 in mutual engagement, it is possible to increase the area and length, and it is also applicable to large light sources. In addition, since the louver film bodies 10 are engaged with each other through the engaging portions 15 and come into close contact with each other, leakage of light can be suppressed at the boundary between the engaging portions 15 . Furthermore, there is no positional deviation between the louver film bodies 10 . That is, even if a plurality of louver films 1 are connected and used, the light transmittance can be substantially uniform as a whole.

In the present embodiment, the engaging portions 15 are provided on one short side 10a and the other short side 10b of the louver film body 10, but the present invention is not limited to this. In the present invention, the louver film body may have engaging portions at arbitrary positions on the long sides (sides in the longitudinal direction of the louver film body).

Moreover, in the present embodiment, the case where the engaging protrusions 16 and the engaging recesses 17 are trapezoidal in plan view has been exemplified, but the present invention is not limited to this. The engaging convex portion 16 and the engaging concave portion 17 may have a trapezoidal shape in plan view, a rectangular convex portion in plan view, an elliptical shape in plan view, or a wedge shape in plan view. preferable. In the present invention, as shown in FIG. 3, the engaging projection 16 has a rectangular projection 31 in plan view and a circular projection 32 having a larger area than the rectangular projection 31 in plan view. are connected along the longitudinal direction of the louver film 1, the engaging recess 17 is a rectangular recess 33 in plan view, and the circular recess 34 having a larger area than the rectangular recess 33 in plan view is a louver. It may have a shape that is continuous along the longitudinal direction of the film 1 . Further, as shown in FIG. 4, the engaging convex portion 16 is formed by a first rectangular convex portion 41 in plan view and a second rectangular convex portion having a larger area than the first rectangular convex portion 41 in plan view. 42 is a shape connected along the longitudinal direction of the louver film 1, and the engaging recess 17 has a larger area than the first rectangular recess 43 in plan view and the first rectangular recess 43 in plan view. The two rectangular recesses 44 may be connected along the longitudinal direction of the louver film 1 . Further, as shown in FIG. 5, the engaging convex portion 16 has a rectangular convex portion 51 in plan view and a second rectangular convex portion 52 having a larger area than the first rectangular convex portion 51 in plan view. The engaging recess 17 has a shape that is continuous along the longitudinal direction of the louver film 1, and the engaging recess 17 has a rectangular recess 53 in plan view and a second rectangular recess having a larger area than the first rectangular recess 53 in plan view. 54 may be connected along the longitudinal direction of the louver film 1 . Also, as shown in FIG. 6, two engaging protrusions 16 are formed in parallel in a direction perpendicular to the longitudinal direction of the louver film body 10, and two engaging recesses 17 are formed in a direction perpendicular to the longitudinal direction of the louver film body 10. may be formed in parallel to each other.

Further, in the present embodiment, the case where one short side 10a of the louver film body 10 has the engaging protrusion 16 and the other short side 10b of the louver film body 10 has the engaging recess 17 is illustrated. The invention is not limited to this. In the present invention, as shown in FIG. 7, at least one portion (for example, one short side 10a) of the louver film main body 10 may have only the trapezoidal engaging protrusion 16 in plan view. . Alternatively, as shown in FIG. 8, at least one portion (for example, the other short side 10b) of the louver film body 10 may have only the trapezoidal engaging recess 17 in plan view. Even if the engaging projection 16 or the engaging recess 17 is provided in at least one location of the louver film body 10, the engaging projection 16 or the engaging recess 17 has a trapezoidal shape in plan view. A shape such as a rectangular projection, an elliptical shape in plan view, or a wedge shape in plan view is applicable.

Moreover, although the case where the louver film 1 is not provided with the transparent protective layer was illustrated in this embodiment, this invention is not limited to this. In the present invention, the louver film may have a transparent protective layer as described later.

Further, in the present embodiment, the case where the plurality of light transmission bands 11 and the plurality of light shielding bands 12 are provided in parallel with the short direction of the louver film main body 10 was exemplified, but the present invention is not limited to this. In the present invention, a plurality of light transmission zones and a plurality of light shielding zones may be provided parallel to the longitudinal direction of the louver film body, or may be provided diagonally with respect to the lateral direction or longitudinal direction of the louver film body. may be provided. The same applies to other embodiments described later.

(Manufacturing method of louver film)
The louver film 1 of this embodiment can be manufactured by a method having a louver film main body forming step and an engaging portion forming step. Furthermore, the louver film main body forming step includes a laminate forming step, a block forming step, and a cutting step. Further, the method for manufacturing the louver film of the present embodiment may have a transparent protective layer lamination step.

[Laminate forming step]
The laminate forming step is a step of alternately laminating a plurality of light transmission band sheets and a plurality of light shielding band sheets to form a laminate.
The light-transmitting band sheet can be manufactured by molding the resin material forming the light-transmitting band 11 into a sheet. The light shielding band sheet can be manufactured by molding the resin material forming the light shielding band 12 into a sheet. The light-transmitting band sheet and the light-shielding band sheet are each formed to have a constant thickness. As a molding method for molding the resin material into a sheet, for example, extrusion molding, calendar molding, press molding, etc. can be applied.

In the formation of the laminate, a plurality of sheets for the light transmission band and a plurality of sheets for the light shielding band may be alternately laminated one by one to form the laminate. A plurality of laminated units may be prepared in advance by alternately laminating the light-shielding belt sheets, and then these may be laminated.
Further, the sheet for the light transmission band and the sheet for the light shielding band may be adhered using an adhesive.

[Block body forming step]
The block forming step is a step of pressing the laminate to form a block.
For pressing the laminate, for example, a roll or press can be used. When applying pressure, it is preferable to heat the sheets in order to increase the adhesion between the sheets. The heating temperature is appropriately selected according to the material used. If the heating temperature is too high, the uniformity of the thickness of the sheet will be impaired, and if the heating temperature is too low, the adhesion between the sheets may be weakened.

[Cutting process]
The cutting step is a step of cutting the block obtained by the block forming step to obtain the louver film main body. In this embodiment, as shown in FIG. 9, the block body 100 is cut so that the louver film body 10 has a uniform thickness.
As a cutting method in the cutting step, for example, the light transmission band sheet 110 (the first light transmission band sheet 111, the second light transmission band sheet 112, the third light transmission band sheet 113) and the light shielding band sheet 120 A cutting blade is cut perpendicularly to the surface of the block 100 from which both are exposed to simultaneously cut the light-transmitting band sheet 110 and the light-shielding band sheet 120 at the same time.
As another cutting method, a cutting blade is vertically cut from one surface of the block 100 where only the light-transmitting band sheet 110 or only the light-shielding band sheet 120 is exposed, and the cutting blade or the block is moved to cut the light. A method of alternately cutting the transmissive band sheet 110 and the light shielding band sheet 120 may be used.

[Transparent Protective Layer Lamination Step]
The transparent protective layer laminating step is a step of laminating a transparent protective layer (not shown) on at least one surface 10c of the louver film body 10 obtained by the cutting step (the light emitting side surface of the louver film body 10).

As a method for laminating the transparent protective layer, for example, there is a method in which the material constituting the transparent protective layer is formed into a sheet in advance, and the resulting transparent sheet is adhered to at least one surface 10c of the louver film body 10. mentioned. When attaching the transparent sheet, an adhesive may be used, or thermocompression bonding may be performed without using an adhesive.

When an adhesive is used, the adhesive preferably has a high light transmittance after curing. Specifically, the light transmittance of the cured adhesive layer alone is preferably 65% or more, more preferably 80% or more.
Specifically, the light transmittance is preferably 65% or more and 100% or less, more preferably 80% or more and 100% or less.

Examples of such adhesives include epoxy-based adhesives, urethane-based adhesives, acrylic-based adhesives, melamine-based adhesives, polyester-based adhesives, and silicone-based adhesives. Moreover, the adhesive may be any of a thermosetting adhesive, a multi-liquid reactive adhesive, an ultraviolet curable adhesive, and the like.

In this embodiment, in the step of laminating the transparent protective layer, the other surface 10d (the surface opposite to the light emitting side of the louver film body 10) of the louver film body 10 obtained by the cutting step also has A transparent protective layer may be laminated. The lamination method of the transparent protective layer is as described above.

[Engaging Portion Forming Step]
The engaging portion forming step is a step of forming engaging portions 15 in the louver film body 10 obtained by the cutting step or the louver film body 10 with the transparent protective layer laminated obtained by the transparent protective layer laminating step.
In the engaging portion forming step in this embodiment, the sheet-like louver film body 10 is formed into a rectangular shape having a predetermined engaging portion shape.

Examples of the forming method include a method of punching the louver film body 10 with a punching die having a predetermined shape of the engaging portion, and a method of forming the louver film body 10 into a predetermined shape of the engaging portion by laser.

Through the steps described above, the louver film 1 of the present embodiment shown in FIGS. 1 and 2 is obtained.

<Second embodiment>
(Louver film connection body)
A louver film connecting body according to a second embodiment of the present invention will be described.
FIG. 10 is a plan view showing the louver film connecting body of this embodiment. 11 is a cross-sectional view taken along line BB of FIG. 10. FIG. 10 and 11, the same components as those of the louver film shown in FIG. 1 are denoted by the same reference numerals, and description thereof is omitted.
A connected louver film 200 of this embodiment includes a first louver film 210 and a second louver film 220 .
A louver film connection body 200 is formed by connecting a first louver film 210 and a second louver film 220 .

The first louver film 210 has a first engaging portion (engaging convex portion) 230 on one short side 10 a of the louver film body 10 . Also, the first louver film 210 may have a second engaging portion (engaging concave portion) 240 on the other short side 10b of the louver film body 10, as shown in FIG. Also, the first louver film 210 may not have the second engaging portion (engaging concave portion) 240 on the other short side 10 b of the louver film body 10 .
The second louver film 220 has a second engaging portion (engaging concave portion) 240 on the other short side 10b of the louver film body 10 . Further, the second louver film 220 may have a first engaging portion (engaging convex portion) 230 on one short side 10a of the louver film body 10, as shown in FIG. Also, the second louver film 220 may not have the first engaging portion (engaging convex portion) 230 on one short side 10 a of the louver film body 10 .
The first louver film 210 and the second louver film 220 are made of the louver film of the present invention.

The connected louver film 200 of this embodiment has a connecting portion 250 in which the first engaging portion 230 of the first louver film 210 and the second engaging portion 240 of the second louver film 220 are engaged with each other. have.
At the connecting portion 250, the first louver film 210 and the second louver film 220 are in close contact. That is, the first engaging portion 230 of the first louver film 210 and the second engaging portion 240 of the second louver film 220 are closely attached without any gap.

The first engaging portion 230 and the second engaging portion 240 have connecting regions that fit together. That is, the shape of the first engaging portion 230, which is an engaging convex portion, and the shape of the area surrounded by the second engaging portion 240, which is an engaging concave portion, are substantially the same. As a result, the first louver film 210 and the second louver film 220 are brought into close contact at the connection portion 250 .

In the present embodiment, the angle formed by the thickness direction of the first louver film 210 in the first engaging portion 230 and the center line drawn in the direction from the light incident side to the light emitting side of the light blocking band 12, The angle formed by the thickness direction of the second louver film 220 in the second engaging portion 240 and the center line drawn in the direction from the light incident side to the light emitting side of the light blocking band 12 may be equal. . The light transmission bands 11 of the first louver film 210 and the second louver film 220 in the first engaging portion 230 and the second engaging portion 240 may have the same width. Furthermore, the thickness of each light transmission band 11 and each light shielding band 12 may be equal. As a result, the first engaging portion 230 and the second engaging portion 240 can have the same visible angle and the same maximum light transmittance angle.

In the present embodiment, the angle formed by the thickness direction of the first louver film 210 in the first engaging portion 230 and the center line drawn in the direction from the light incident side to the light emitting side of the light blocking band 12, The angle formed by the thickness direction of the second louver film 220 in the second engaging portion 240 and the center line drawn in the direction from the light incident side to the light emitting side of the light blocking band 12 may be different. The light transmission bands 11 of the first louver film 210 and the second louver film 220 in the first engaging portion 230 and the second engaging portion 240 may have the same width. Furthermore, the thickness of each light transmission band 11 and each light shielding band 12 may be equal. As a result, the first engaging portion 230 and the second engaging portion 240 can have the same visible angle and different maximum light transmittance angles.

In the present embodiment, the angle formed by the thickness direction of the first louver film 210 in the first engaging portion 230 and the center line drawn in the direction from the light incident side to the light emitting side of the light blocking band 12, The angle formed by the thickness direction of the second louver film 220 in the second engaging portion 240 and the center line drawn in the direction from the light incident side to the light emitting side of the light blocking band 12 may be equal. . The first louver film 210 and the second louver film 220 in the first engaging portion 230 and the second engaging portion 240 may have different widths of the light transmission bands 11 . Furthermore, the thickness of each light transmission band 11 and each light shielding band 12 may be equal. As a result, the first engaging portion 230 and the second engaging portion 240 can have different visible angles and equal maximum light transmittance angles.

In the present embodiment, the angle formed by the thickness direction of the first louver film 210 in the first engaging portion 230 and the center line drawn in the direction from the light incident side to the light emitting side of the light blocking band 12, The angle formed by the thickness direction of the second louver film 220 in the second engaging portion 240 and the center line drawn in the direction from the light incident side to the light emitting side of the light blocking band 12 may be equal. . The light transmission bands 11 of the first louver film 210 and the second louver film 220 in the first engaging portion 230 and the second engaging portion 240 may have the same width. Furthermore, the thickness of each light transmission band 11 and each light shielding band 12 may be different. As a result, the first engaging portion 230 and the second engaging portion 240 can have different visible angles and equal maximum light transmittance angles.

In this embodiment, as shown in FIG. 11, one surface 210a of the first louver film 210 is provided with a first transparent protective layer 260, and the other surface 210b of the first louver film 210 is provided with a second transparent protective layer 260. A protective layer 270 may be provided. Alternatively, the first transparent protective layer 280 may be provided on one surface 220a of the second louver film 220, and the second transparent protective layer 290 may be provided on the other surface 220b of the second louver film 220. Since the first louver film 210 and the second louver film 220 are connected, the first transparent protective layer 260 and the first transparent protective layer 280 may be integrated, and the second transparent protective layer 270 may be integrated. and the second transparent protective layer 290 may be integrated. The first transparent protective layers 260, 280 and the second transparent protective layers 270, 290 are layers made of a transparent resin material or glass, and are protective layers of the first louver film 210 and the second louver film 220. function as

In this embodiment, the first transparent protective layers 260, 280 and the second transparent protective layers 270, 290 are provided on both surfaces of the first louver film 210 and the second louver film 220. However, the invention is not limited to this. In the present invention, in the first louver film and the second louver film, at least the surfaces (surfaces on the light exit side) from which light transmitted through each louver film is emitted should be provided with a transparent protective layer. . Since the light-incident surface is adhered to the light source or the like and is not exposed, it is not damaged. Therefore, it is not necessary to provide a transparent protective layer on the surface on which light is incident.

The first transparent protective layers 260, 280 and the second transparent protective layers 270, 290 preferably have a light transmittance of 75% or more, more preferably 85% or more, when light is incident along the thickness direction. is more preferable. Specifically, the light transmittance is preferably 75% or more and 100% or less, more preferably 85% or more and 100% or less.

Examples of transparent resin materials constituting the first transparent protective layers 260, 280 and the second transparent protective layers 270, 290 include polycarbonate resins, polyester resins, acrylic resins, and polyolefin resins (especially, cycloolefin polymers). , cellulose-based resins, and the like. Among these transparent resin materials, polycarbonate or polyester resins are preferred because of their high transparency and heat resistance. One of the transparent resin materials may be used alone, or two or more of them may be used in combination.

The thickness of the first transparent protective layers 260, 280 and the second transparent protective layers 270, 290 is preferably 0.01 mm or more and 0.5 mm or less, and more preferably 0.1 mm or more and 0.2 mm or less. more preferred. If the thicknesses of the first transparent protective layers 260, 280 and the second transparent protective layers 270, 290 are equal to or greater than the lower limit, the first louver film 210 and the second louver film 220 can be sufficiently protected, If it is below the said upper limit, sufficient light transmittance can be ensured.

The first transparent protective layers 260, 280 and the second transparent protective layers 270, 290 may be the same or different. Also, the first transparent protective layers 260, 280 and the second transparent protective layers 270, 290 may be printed for decoration.

According to the louver film connection body 200 of the present embodiment, since the first louver film 210 and the second louver film 220 are engaged with each other, it is possible to increase the area and length, and a large light source can be used. It is also applicable to In addition, since the louver film connecting body 200 engages with each other through the engaging portions 15 of the first louver film 210 and the second louver film 220 and comes into close contact, the boundaries (connecting portions) between the engaging portions 15 250), no light leaks. Furthermore, there is no positional deviation between the first louver film 210 and the second louver film 220 . That is, even if the louver film connecting body 200 has a large area or a long length, the light transmittance can be substantially uniform as a whole.

In addition, although the louver film connection body 200 in which the first louver film 210 and the second louver film 220 are connected is illustrated in the present embodiment, the present invention is not limited to this. In the present invention, three or more louver films may be connected.

(Manufacturing method of connected louver film)
The louver film connected body 200 of the present embodiment can be manufactured by a method having a louver film manufacturing process and a louver film connecting process.

[Louver film manufacturing process]
The louver film manufacturing process is the same as the louver film manufacturing method described above.

[Louver film connecting process]
In the louver film connecting step, the first engaging portion 230 of the first louver film 210 is engaged with the second engaging portion 240 of the second louver film 220, and the first engaging portion 230 and the second engaging portion 230 are connected. In this step, two engaging portions 240 are engaged with each other to form connecting portions 250 to form the louver film connecting body 200 .

Through the above steps, the louver film connected body 200 of the present embodiment shown in FIGS. 10 and 11 is obtained.

<Third Embodiment>
(louver film laminate)
A louver film laminate according to a third embodiment of the present invention will be described.
FIG. 12 is a cross-sectional view showing the louver film connecting body of this embodiment. In FIG. 12, the same components as those of the louver film shown in FIG. 1 and the louver film assembly shown in FIG.
A louver film laminate 300 of this embodiment includes a first louver film 210 , a second louver film 220 , and a transparent substrate 310 .
In the louver film laminate 300 , a first louver film 210 and a second louver film 220 are arranged on one surface 310 a of a transparent substrate 310 . Also, the first louver film 210 and the second louver film 220 are connected at one surface 310 a of the transparent substrate 310 .

The transparent substrate 310 preferably has a light transmittance of 75% or more, more preferably 85% or more, when light is incident along the thickness direction. Specifically, the light transmittance is preferably 75% or more and 100% or less, more preferably 85% or more and 100% or less.

As the transparent resin material forming the transparent base material 310, for example, the same transparent resin material as forming the first transparent protective layers 260, 280 and the second transparent protective layers 270, 290 is used.

The thickness of the transparent substrate 310 is preferably 0.01 mm or more and 0.5 mm or less, and more preferably 0.1 mm or more and 0.2 mm or less. If the thickness of the transparent substrate 310 is equal to or greater than the lower limit, the strength of the louver film laminate 300 can be ensured. If the thickness of the transparent base material 310 is equal to or less than the upper limit, sufficient light transmittance can be secured.

According to the louver film laminate 300 of the present embodiment, since the first louver film 210 and the second louver film 220 are engaged with each other on one surface 310a of the transparent base material 310, the first louver film The number of members (transparent protective layers) for protecting the surfaces of the film 210 and the second louver film 220 can be reduced. In addition, the louver film laminate 300 can be made large and long, and can be applied to a large light source. In addition, since the louver film laminate 300 engages with each other through the engaging portions 15 of the first louver film 210 and the second louver film 220 and comes into close contact, the boundaries (connecting portions) between the engaging portions 15 250), no light leaks. Furthermore, there is no positional deviation between the first louver film 210 and the second louver film 220 . That is, even if the louver film laminate 300 has a large area or a long length, the light transmittance can be substantially uniform as a whole. In addition, the first louver film 210 and the second louver film 220 can be integrally transported in a state where they are connected at one surface 310a of the transparent substrate 310 .

In this embodiment, the louver film laminate 300 in which the first louver film 210 and the second louver film 220 are connected is illustrated, but the present invention is not limited to this. In the present invention, three or more louver films may be connected.

(Manufacturing method of louver film laminate)
The louver film laminate 300 of the present embodiment can be manufactured by a method including a louver film manufacturing process and a louver film connecting process. Furthermore, the louver film connecting step has a louver film connecting body lamination step.

[Louver film manufacturing process]
The louver film manufacturing process is the same as the louver film manufacturing method described above.

[Louver film connecting process]
In the louver film connecting step, the first engaging portion 230 of the first louver film 210 is engaged with the second engaging portion 240 of the second louver film 220, and the first engaging portion 230 and the second engaging portion 230 are connected. In this step, two engaging portions 240 are engaged with each other to form connecting portions 250 to form the louver film connecting body 200 .

[Louver film connecting body lamination process]
The louver film connecting body lamination step is a step of laminating the louver film connecting body 200 obtained in the louver film connecting step on one surface 310 a of the transparent substrate 310 .

As a method of laminating the louver film connected body 200, for example, a method of adhering the louver film connected body 200 to one surface 310a of the transparent substrate 310 can be used. When the louver film connecting body 200 is attached, an adhesive may be used, or thermocompression bonding may be performed without using an adhesive.

When an adhesive is used, the same adhesive as used in the above transparent protective layer lamination step is used.

Through the above steps, the louver film laminate 300 of this embodiment shown in FIG. 12 is obtained.

<Fourth Embodiment>
(louver film)
A louver film according to a fourth embodiment of the present invention will be described.
FIG. 13 is a plan view showing the louver film of this embodiment. In FIG. 13, the same components as those of the louver film shown in FIG.
As shown in FIG. 13, the louver film 400 of this embodiment has trapezoidal engaging projections 16 on one short side 10a and the other short side 10b of the louver film body 10 in a plan view.

<Fifth Embodiment>
(louver film)
A louver film according to a fifth embodiment of the present invention will be described.
FIG. 14 is a plan view showing the louver film of this embodiment. In FIG. 14, the same components as those of the louver film shown in FIG.
As shown in FIG. 14, the louver film 500 of this embodiment has trapezoidal engaging recesses 16 on one short side 10a and the other short side 10b of the louver film main body 10 in plan view.

<Sixth Embodiment>
(louver film)
A louver film according to a sixth embodiment of the present invention will be described.
FIG. 15 is a perspective view showing the louver film of this embodiment. In FIG. 15, the same components as those of the louver film shown in FIG.
As shown in FIG. 15, the louver film 600 of this embodiment has two louver film main bodies 10 (10A, 10B) laminated together. In other words, the louver film body 10B is laminated on the louver film body 10A. As shown in FIG. 15, the light transmission band 11 and the light shielding band 12 that constitute the louver film body 10A are arranged in parallel with the thickness direction of the louver film body 10A. In addition, the light transmitting band 11 and the light shielding band 12 forming the louver film body 10B are arranged in parallel with the thickness direction of the louver film body 10B. As shown in FIG. 15, the louver film body 10A and the louver film body 10B are composed of a light transmission band 11 and a light blocking band 12 that constitute the louver film body 10A, and a light transmission band 11 and a light blocking band 12 that constitute the louver film body 10B. are arranged so that they intersect vertically. Also, the louver film body 10A and the louver film body 10B have the same thickness. That is, the thickness of the light transmission band 11 and the light shielding band 12 forming the louver film main body 10A is equal to the thickness of the light transmission band 11 and the light shielding band 12 forming the louver film main body 10B.

<Seventh Embodiment>
(louver film)
A louver film according to a seventh embodiment of the present invention will be described.
FIG. 16 is a perspective view showing the louver film of this embodiment. In FIG. 16, the same components as those of the louver film shown in FIG.
As shown in FIG. 16, the louver film 700 of this embodiment has two louver film main bodies 10 (10A, 10B) laminated together. In other words, the louver film body 10B is laminated on the louver film body 10A. As shown in FIG. 16, the light transmission band 11 and the light shielding band 12 forming the louver film body 10A are arranged in parallel with the thickness direction of the louver film body 10A. In addition, the light transmitting band 11 and the light shielding band 12 forming the louver film body 10B are arranged in parallel with the thickness direction of the louver film body 10B. As shown in FIG. 16, a louver film body 10A and a louver film body 10B are composed of a light transmission band 11 and a light blocking band 12 that constitute the louver film body 10A, and a light transmission band 11 and a light blocking band 12 that constitute the louver film body 10B. are arranged so that they intersect vertically. Also, the louver film body 10A and the louver film body 10B have different thicknesses. In other words, the thickness of the light transmission band 11 and the light shielding band 12 forming the louver film main body 10A is different from the thickness of the light transmission band 11 and the light shielding band 12 forming the louver film main body 10B. Specifically, the thickness of the light transmission band 11 and the light shielding band 12 forming the louver film main body 10A is larger than the thickness of the light transmission band 11 and the light shielding band 12 forming the louver film main body 10B.

<Eighth Embodiment>
(louver film)
A louver film according to an eighth embodiment of the present invention will be described.
FIG. 17 is a perspective view showing the louver film of this embodiment. In FIG. 17, the same components as those of the louver film shown in FIG.
As shown in FIG. 17, the louver film 800 of this embodiment is formed by laminating two louver film bodies 10 (10A, 10B). In other words, the louver film body 10B is laminated on the louver film body 10A. As shown in FIG. 17, the light transmission band 11 and the light shielding band 12 forming the louver film body 10A are arranged in parallel with the thickness direction of the louver film body 10A. On the other hand, the light transmission band 11 and the light shielding band 12 that constitute the louver film body 10B are arranged obliquely with respect to the thickness direction of the louver film body 10B. As a result, the louver film body 10A and the louver film body 10B are arranged so that the light transmission zone 11 and the light blocking zone 12 that constitute the louver film body 10A and the light transmission zone 11 and the light blocking zone 12 that constitute the louver film body 10B are obliquely arranged. arranged to intersect.

Further, in the present embodiment, the light transmission band 11 and the light shielding band 12 constituting the louver film main body 10A may be arranged obliquely with respect to parallel to the thickness direction of the louver film main body 10A.

<Ninth Embodiment>
(louver film)
A louver film according to the ninth embodiment of the present invention will be described.
FIG. 18 is a perspective view showing the louver film of this embodiment. In FIG. 18, the same components as those of the louver film shown in FIG.
As shown in FIG. 18, the louver film 900 of this embodiment is formed by laminating two louver film bodies 10 (10A, 10B). In other words, the louver film body 10B is laminated on the louver film body 10A. As shown in FIG. 18, the light transmission band 11 and the light shielding band 12 that constitute the louver film body 10A are arranged in parallel with the thickness direction of the louver film body 10A. In addition, the light transmitting band 11 and the light shielding band 12 forming the louver film body 10B are arranged in parallel with the thickness direction of the louver film body 10B. As shown in FIG. 18, the louver film body 10A and the louver film body 10B are composed of a light transmission band 11 and a light blocking band 12 that constitute the louver film body 10A and a light transmission band 11 and a light blocking band 12 that constitute the louver film body 10B. are arranged so that they intersect diagonally. The angle at which the light transmitting band 11 and the light blocking band 12 forming the louver film body 10A and the light transmitting band 11 and the light blocking band 12 forming the louver film body 10B obliquely intersect is preferably 90° or less.

The louver film of the present invention can have a large area and a long length by using the louver film bodies in mutual engagement, and can be applied to a large light source.
Since the first louver film and the second louver film are engaged with each other, the louver film connecting body of the present invention can be increased in area and length, and can be applied to a large light source. .
In the louver film laminate of the present invention, since the first louver film and the second louver film are engaged with each other on one surface of the transparent substrate, it is possible to increase the area and elongate the length. It is also applicable to large light sources.

1 louver film 10 louver film main body 11 light transmitting band 12 light shielding band 15 engaging portion 16 engaging convex portion 17 engaging concave portion 200 louver film connecting body 210 first louver film 220 second louver film 230 first engagement Part 240 Second engaging part 250 Connecting parts 260, 280 First transparent protective layers 270, 290 Second transparent protective layer 300 Louver film laminate 310 Transparent substrate

Claims (16)

A louver film comprising a louver film body in which a plurality of light transmission bands and a plurality of light shielding bands are alternately provided, wherein the louver film bodies are used by being engaged with each other,
Having an engaging portion at an arbitrary position on the periphery of the louver film body,
A louver film in which a plurality of light transmission bands and a plurality of light shielding bands are alternately provided in the engaging portion, the same as in the louver film. The engaging portion comprises an engaging convex portion and an engaging concave portion,
The louver film body has a rectangular shape,
2. The louver film according to claim 1, wherein one short side of said louver film body has said engaging projections, and said other short side of said louver film body has said engaging recesses. When two louver film bodies are engaged with each other, the pitch between the light transmission band and the light shielding band in the engaging convex portion of one louver film body and the engaging concave portion of the other louver film body 3. The louver film according to claim 2, wherein the light-transmitting bands and the light-shielding bands have the same pitch. The louver film according to any one of claims 1 to 3, comprising a transparent protective layer on at least one surface of the louver film body. A first louver film having a first engaging portion and a second louver film having a second engaging portion,
The first louver film and the second louver film are made of the louver film according to any one of claims 1 to 4,
A louver film connecting body having a connecting portion in which a first engaging portion of the first louver film and a second engaging portion of the second louver film are engaged with each other. The louver film connecting body according to claim 5, wherein the first louver film and the second louver film are in close contact at the connecting portion. The louver film connected body according to claim 5 or 6, wherein said first engaging portion and said second engaging portion have connecting regions that engage with each other. The angle formed by the thickness direction of the first louver film in the first engaging portion and the center line drawn in the direction from the light incident side to the light emitting side of the light blocking band, and the second engaging portion. 8. The angle formed by the thickness direction of the second louver film at the joining portion and the center line drawn in the direction from the light incident side to the light emitting side of the light blocking band is equal to the angle formed by the second louver film. The louver film connected body according to the item. The angle formed by the thickness direction of the first louver film in the first engaging portion and the center line drawn in the direction from the light incident side to the light emitting side of the light blocking band, and the second engaging portion. 8. Any one of claims 5 to 7, wherein an angle formed by a thickness direction of the second louver film at the joining portion and a center line drawn in a direction from the light incident side to the light emitting side of the light blocking band is different. The louver film connected body according to the item. 10. Any one of claims 5 to 9, wherein the pitch between the light transmission band and the light blocking band in the first engaging portion is equal to the pitch between the light transmitting band and the light blocking band in the second engaging portion. The louver film connected body according to the item. Any one of claims 5 to 9, wherein a pitch between the light transmission band and the light shielding band in the first engaging portion is different from a pitch between the light transmission band and the light shielding band in the second engaging portion. The louver film connected body according to the item. The louver film connecting body according to any one of claims 5 to 11, wherein the thickness of the first louver film and the thickness of the second louver film are equal. The louver film assembly according to any one of claims 5 to 11, wherein the thickness of the first louver film and the thickness of the second louver film are different. The louver film assembly according to any one of claims 5 to 13, wherein each of the first louver film and the second louver film has a transparent protective layer on at least one surface thereof. comprising a transparent substrate and a louver film connecting body arranged on one surface of the transparent substrate;
A louver film laminate, wherein the louver film assembly is the louver film assembly according to any one of claims 5 to 13. 16. The louver film laminate according to claim 15, wherein each of the first louver film and the second louver film has a transparent protective layer on the surface opposite to the surface in contact with the transparent substrate.

Images