JP7267612B2 - Display film and display device having display film - Google Patents

Description

TECHNICAL FIELD The present invention relates to a display film that emits light to display desired shapes such as characters, numbers, and graphics, and a display device having the display film.

For example, Japanese Laid-Open Patent Publication No. 2002-100000 describes a display device that provides a decorative effect by displaying shapes such as characters with light emission. This display device has a mirror surface, a half-mirror layer formed above the mirror surface with a translucent layer interposed therebetween, and a desired shape at a position between the mirror surface and the half-mirror layer and at a distance from the mirror surface and the half-mirror layer. The characters and the like emitted by the light emitting means are reflected on the mirror surface, and the reflected mirror image is reflected by the half-mirror layer, so that the characters and the like appear three-dimensionally through the half-mirror layer. It has become observable.

JP 2008-70697 A (paragraphs 0005 and 0006, FIG. 2)

In the display device described in Patent Document 1, when the light-emitting means is turned off, such as during the daytime, only a monotonous metallic color reflecting the material of the half-mirror layer is visible from the outside. Even when the light-emitting means is turned on, only characters and the like are displayed in a monotonous metallic color, so there is a problem that the display device does not have a high-class feeling, texture, and decorative effect.

The present invention has been made by paying attention to such problems, and by reproducing the uneven pattern on the metal surface and making it visible from the surface, it gives a luxurious feeling both when the light emitting means is turned off and when it is turned on. It is an object of the present invention to provide a display film and a display device having the display film, which can enhance texture and decoration effect.

In order to solve the above problems, the display film of the present invention comprises:
A display film used in a display device that emits light to display a desired shape such as characters,
a sheet-shaped transparent substrate having translucency;
a half mirror layer provided on the back side of the transparent substrate;
a colored smoke layer provided on the back side of the half mirror layer;
a display layer provided on the back side of the smoke layer and capable of expressing a desired shape such as the character ;
with
Directly on the surface of the transparent base material, the polishing treatment is performed by an abrasive grain polishing machine in which the distance between the adjacent abrasive grains is uneven and the shape of the abrasive grains is formed unevenly. It is characterized by forming a patterned surface in which the land width of the smooth land between the adjacent grooves and the groove width of the adjacent grooves are uneven .
According to this feature, when the light-emitting means arranged on the back side of the display film is turned off and the outside is bright, the groove widths and spacing widths of the grooves adjacent to each other on the front side of the transparent substrate are formed unevenly. A patterned surface composed of grooves is reflected by the half-mirror layer and appears on the surface, and a metallic uneven pattern is visually recognized from the surface of the display device as if the surface of the metal had undergone a surface processing treatment. Further, when the light-emitting means is turned on, the shape of characters or the like expressed on the display layer is transmitted through the half mirror layer and displayed by light emission on the surface of the transparent base material, and the characters or the like are displayed on the surface of the metallic uneven pattern. It is visually recognized as if Therefore, the metallic uneven pattern can be visually recognized from the surface both when the light-emitting means is turned off and when it is turned on, so that the display device can have a high-class feeling, a texture, and a decorative effect.

The patterned surface formed on the transparent base material is characterized in that patterns of a predetermined number of groove groups are formed in parallel.
According to this feature, a large pattern surface can be formed without using a large processing machine by arranging a predetermined number of groove group patterns in parallel.

The half-mirror layer is characterized in that it is formed by vapor-depositing a metallic film-forming material on the back side of the transparent substrate.
According to this feature, in vapor deposition, a metallic film-forming material is heated to evaporate or sublimate, and the vaporized or sublimated particles adhere and deposit on the back surface of a transparent substrate to form a thin film. is extremely small, and the contours of shapes such as characters on the display layer that are displayed by light emission through the half mirror layer can be expressed sharply.

The display device having the display film is a display device that emits light to display a desired shape such as characters,
It is characterized in that a light emitting means for emitting light in the desired shape is provided on the back side of the display layer of the display film.
According to this feature, when the light-emitting means arranged on the back side of the display film is turned off and the outside is bright, the groove widths and spacing widths of the grooves adjacent to each other on the front side of the transparent substrate are formed unevenly. A patterned surface composed of grooves is reflected by the half-mirror layer and appears on the surface, and a metallic uneven pattern is visually recognized from the surface of the display device as if the surface of the metal had undergone a surface processing treatment. Further, when the light-emitting means is turned on, the shape of characters or the like expressed on the display layer is transmitted through the half mirror layer and displayed by light emission on the surface of the transparent base material, and the characters or the like are displayed on the surface of the metallic uneven pattern. It is visually recognized as if Therefore, the metallic uneven pattern can be visually recognized from the surface both when the light-emitting means is turned off and when it is turned on, so that the display device can have a high-class feeling, a texture, and a decorative effect.

The light emitting means is characterized by comprising a light source and a light guide member that introduces light from the light source and emits surface light.
According to this feature, even in a display device having a large display area, characters and the like on the display layer can be uniformly illuminated by the surface-emitting light guide member, thereby improving visibility.

The light source is characterized by being an LED lamp.
According to this feature, since the LED lamp has directivity, the entire light guide member can emit bright surface light. In addition, since the amount of heat generated by the light source is small, there is no possibility that surrounding members will be thermally affected, and the light source can have a long life and reduce power consumption.

FIG. 2 is a front view of the display device according to Example 1 of the present invention when light emitting means are lit; Similarly, it is a front view when the light emitting means is turned off. 2 is an enlarged cross-sectional view taken along line AA of FIG. 1; FIG. 1 is an enlarged cross-sectional view of a display film of the present invention; FIG. FIG. 5 is an enlarged cross-sectional view of a display device according to Example 2 of the present invention; 3 is an enlarged cross-sectional view of a display device according to Example 3 of the present invention; FIG. FIG. 11 is a front view of a display device according to Example 4 of the present invention; FIG. 1 shows a manufacturing process of the display film of the present invention, and is a schematic diagram showing an embodiment in which the surface of a transparent substrate is subjected to hairline processing with an abrasive polishing belt. 1 shows the manufacturing process of the display film of the present invention, (a) is a cross-sectional view of the process of forming a half mirror layer on the transfer surface of the back surface of the transparent layer, (b) is a smoked film on the back surface of the half mirror layer. FIG. 4C is a cross-sectional view of a process of forming a layer, and (c) is a cross-sectional view of a process of forming a display layer on the rear surface of the smoke layer.

Embodiments for implementing the display film and the display device having the display film according to the present invention will be described below based on examples.

First, a display device according to Example 1 will be described with reference to FIGS. 1 to 4. FIG. In the following description, the side on which characters and the like are viewed (upper side in FIG. 3) is the front side, and the opposite side is the back side. The display device 1 is used for various displays (monitors) that luminesce a desired shape such as characters. 2 is a front view of the display device 1 when the light emitting means 4 is turned off.

As shown in the enlarged cross-sectional view of FIG. 3, the display device 1 includes a display film 3 housed in a horizontally long rectangular case 2 having an opening on the front side, and a display film 3 provided on the back side of the display film 3. and a light emitting means 4 . The thickness of the display film 3 is exaggerated for easy understanding.

As shown in the enlarged view of FIG. 4, the display film 3 of the present invention comprises a transparent layer 6, a half mirror layer 7, a smoke layer 15, and a display layer 8 in order from the surface side, and is formed by laminating them. It is The transparent layer 6 is composed of a translucent transparent base material 5 having a pattern surface 9 described later on the surface side, and the transparent base material 5 is a transparent film made of, for example, PET (polyethylene terephthalate) resin, polycarbonate, or the like. , is flexible.

The transparent layer 6 has a patterned surface 9 formed by subjecting the surface of the transparent base material 5 to a polishing treatment with an abrasive grain polishing machine or the like so that the surface is processed to have a fine uneven pattern. The uneven pattern in this embodiment is a hairline pattern.

The half mirror layer 7 is formed by vapor-depositing a metallic film-forming material on the back surface of the transparent substrate 5 . As the film-forming material, it is preferable to use, for example, a material containing high-brightness aluminum. By using such a film-forming material, it is possible to form the half-mirror layer 7 with a metallic tone close to that of a mirror, and the uneven pattern is reflected by the half-mirror layer 7 with a metallic tone with high brightness. In vapor deposition, a metallic film material is heated to evaporate or sublimate, and the vaporized or sublimated particles adhere and deposit on the back surface of a transparent substrate to form a thin film, so the half mirror effect is effective. The thickness (light transmittance is about 18%) and the particle size is extremely small, so that the outline of the shape such as characters of the display layer 8 that is displayed by light emission through the half mirror layer 7 is expressed. It is possible to express sharp contours with little effect on the image.

The smoke layer 15 can be formed by printing on the rear surface of the half-mirror layer 7 with, for example, transparent colored ink obtained by mixing black or brown ink with transparent ink. When the display layer 8 is directly illuminated by the light source 11, the illuminated light source 11 and internal members may be seen through from the surface. To prevent this, a smoke layer 15 is provided on the back surface of the display layer 8. .

The display layer 8 receives the light emitted from the light emitting means 4 and displays a desired shape consisting of letters, numbers, symbols, figures, or a combination thereof on the surface of the transparent layer 6. In this embodiment, For example, in order to luminesce display the alphabetic characters 10, non-translucent ink is printed on the rear surface of the smoke layer 15 while leaving the areas where the alphabetic characters 10 are formed, and the portions where the alphabetic characters 10 are to be formed are defined as translucent portions 8a, Other portions are used as opaque portions.

The light emitting means 4 is composed of one or more left and right light sources 11, 11, and a light guide member 12 that introduces the light from the light sources 11, 11 from left and right end surfaces to emit surface light. As the light source 11, it is preferable to use an LED lamp because it generates little heat, has a long life, and consumes little power. good. In particular, by combining LED lamps of red, green, and blue, which are the three primary colors of light, and controlling their light emission states, the alphabet characters 10 can be displayed in various colors. The light guide member 12 is made of transparent acryl, polycarbonate, glass, or the like, and is capable of introducing light from the light sources 11 and 11 and emitting uniform surface light.

On the surface of the transparent base material 5, a patterned surface 9 having a so-called hairline pattern including a plurality of grooves 22 is formed. The patterned surface 9 has uneven groove widths and spacing widths between adjacent grooves 22, such as groove widths W1, W2, W3 and spacing widths D1, D2, and D3 of adjacent grooves 22 shown in the balloon in FIG. Since it is uniformly formed, it does not have the unnaturalness of a regular hairline pattern, and because it is irregular, it has a design similar to that of a hairline pattern that is formed on a metal surface.

In the display device 1 according to Example 1, when the light source 11 of the light emitting means 4 is turned off and the outside is bright, such as during the daytime, the alphabet letters 10 of the display layer 8 and the light source 11 are illuminated by the smoke layer 15 as shown in FIG. is concealed, and only the uneven pattern of the pattern surface 9 formed on the front side of the transparent layer 6, that is, the hairline pattern 13 is reflected by the metallic half mirror layer 7 through the transparent layer 6 and appears on the surface and is visually recognized. Since the light incident on the transparent layer 6 having the uneven pattern surface 9 is diffusely reflected by the half mirror layer 7, it becomes a three-dimensional hairline pattern 13, and the metal looks as if the surface of the metal has undergone a surface treatment. An uneven pattern of tone is visually recognized.

On the other hand, when the light source 11 of the light emitting means 4 is turned on to cause the light guide member 12 to emit surface light, the irradiated light passes through the transparent portion 8a of the display layer 8, the smoke layer 15, and the half mirror layer 7 and is emitted to the surface side. As a result, alphabetic characters 10 are displayed by light emission on the surface of the transparent layer 6 . The alphabetic characters 10 appear on the surface of a metallic hairline pattern 13 as if the surface of the metal had undergone a surface treatment. As described above, in the display device 1 according to the first embodiment, the metallic hairline pattern 13 can be visually recognized from the surface both when the light emitting means 4 is turned off and when the light emitting means 4 is turned on. can be enhanced.

Since the transparent layer 6 of the display device 1 has the pattern surface 9 of the hairline pattern 13 formed on the front side, a visual effect comparable to that of a metal surface subjected to a surface processing treatment of uneven patterns such as hairlines can be obtained. In addition, since the unevenness is felt to the touch, it can be recognized as if it were a metal surface that has undergone a surface treatment, in addition to the visual effect.

In addition, a half mirror layer 7 is formed with a uniform thickness on the back surface of the transparent base material 5 which is a smooth surface, and a display layer 8 is formed on the back surface of the smoke layer 15 formed on the back surface of the half mirror layer 7 with a uniform thickness. Since is formed, there is no inconvenience such as blurring or collapse of the outline due to unevenness of the shape of the characters, etc. of the display layer 8, and the outline of the characters, etc. It is possible to clearly visually recognize a desired shape such as .

In addition, the display layer 8 may be a so-called liquid crystal shutter that can express alphabetic characters 10 or other arbitrary shapes according to an input signal.

A display device according to Example 2 will be described with reference to FIG. It should be noted that the same constituent members as those of the first embodiment are given the same reference numerals, and overlapping explanations are omitted. The display device 1 of this embodiment uses an organic EL element 14 that emits surface light as a light emitting means. The display device according to the second embodiment can also achieve the same effects as the display device 1 according to the first embodiment. Further, by using such an organic EL element 14, the light-emitting means can be thinned and lightened, so that the size and weight of the display device 1 can be reduced.

By controlling the emission color of the organic EL element 14, the alphabetical characters 10 or other arbitrary shapes can be displayed by light emission in various color tones. It can also be configured to have both. A display device using the organic EL element 14 can be used as a display for personal computers, tablets, mobile phones, and the like.

A display device according to Example 3 will be described with reference to FIG. It should be noted that the same constituent members as those of the first embodiment are given the same reference numerals, and overlapping explanations are omitted. In the display device 1 of Example 3, the light guide member 12 is omitted, and the display layer 8 is directly illuminated by the light sources 11 of a plurality of LED lamps provided on the back side of the display layer 8 .

A display device according to Example 4 will be described with reference to FIG. The display device of this embodiment is applied to a circular dial 16 of a watch. A patterned surface 9 (not shown in this embodiment) is formed so that a metallic spin pattern 17 appears on the surface of the dial 16 . Further, when the light-emitting means is turned on, the numbers 18 and dots 19 formed on the display layer 8 (not shown in this embodiment) are displayed by light emission on the surface of the metal-tone spin pattern 17. The dial 16 can be highly effective.

Next, with reference to FIGS. 8 and 9, the process of manufacturing the display film 3 according to the present invention will be described. First, as shown in FIG. 8, a patterned surface 9 is formed on the surface of the transparent substrate 5 by hairline processing. Hairline processing is performed by rotating a ring-shaped abrasive grain polishing belt 24 with a belt polisher (not shown) and applying it to the transparent base material 5 to polish the surface of the transparent base material 5 . Specifically, a plurality of grooves parallel to one direction are formed by vertically applying the rotated abrasive grain polishing belt 24 of Nos. P150 to P240 to the surface of the transparent substrate 5 . The abrasive grain polishing belt 24 is formed by adhering a plurality of abrasive grains randomly scattered to a sheet base material (not shown) made of paper or the like. The distance between adjacent abrasive grains is not uniform, and the shape of the abrasive grains is also uneven. Therefore, as shown in FIG. 9, the surface of the transparent substrate 5 polished by the abrasive grain polishing belt 24 has a plurality of grooves 22 parallel to one direction, and the groove width and interval width between the grooves 22 are The patterned surface 9 is unevenly formed and has a hairline pattern. This is the same design as when hairline processing is applied to the metal surface.

When forming the patterned surface 9 on the large-sized transparent base material 5, first, the abrasive grain polishing belt 24 is applied perpendicularly to one end side of the transparent base material 5 in the width direction so that the plurality of grooves 22 are formed. After the formation, the abrasive grain polishing belt 24 is shifted in the horizontal direction from the grooves 22 formed, and the surface of the transparent substrate 5 is again vertically applied for polishing. As a result, the patterned surface 9 formed on the surface of the transparent base material 5 is formed into a pattern of a group of grooves composed of a predetermined number (that is, a plurality of grooves 22 formed by vertically applying the abrasive grain polishing belt 24 once). ) are arranged in parallel to form a patterned surface 9 having a plurality of grooves 22 parallel to one direction on the entire surface of the transparent substrate 5 . According to this, a large patterned surface 9 can be formed without using a large processing machine by arranging a predetermined number of groove group patterns in parallel.

By using a lathe that rotates horizontally with respect to the surface of the transparent substrate 5, a plurality of grooves parallel to the circumferential direction can be formed with non-uniform groove widths and spacing widths, as shown in FIG. A patterned surface 9 with a certain spin pattern can be formed.

Next, as shown in FIG. 9A, a film-forming material containing high-brightness aluminum is vapor-deposited on the back surface of the transparent substrate 5 to form a half-mirror layer 7. Next, as shown in FIG. The half-mirror layer 7 may be formed by coating with a printing process (for example, screen printing).

Next, as shown in FIG. 9B, a colored transparent ink is printed on the rear surface of the half mirror layer 7 to form a smoke layer 15. Next, as shown in FIG. Next, as shown in FIG. 9C, the display layer 8 is formed on the rear surface of the smoke layer 15. Next, as shown in FIG. The display layer 8 can be formed by printing (for example, screen printing) a non-translucent ink on the rear surface of the smoke layer 15 so that a formation area for characters or the like remains as a translucent portion 8a. Through the steps described above, the display film 3 according to the present invention can be easily manufactured.

In addition, since the half-mirror layer 7 is formed as a thin film by vapor deposition on the back surface of the transparent substrate 5, which is a smooth surface, the unevenness of the back surface is small and smoothness can be easily maintained on the back surface. Since it is formed by printing with a uniform thickness, it can be easily formed with a uniform thickness, and since it penetrates into the very fine unevenness of the half mirror layer 7 and is cured, it is possible to enhance the integrity. Since the display layer 8 is formed by printing on the back surface of the smoke layer 15, which has a uniform thickness and a smooth surface, in the printing process for forming the display layer 8 that can express the shape of a sharp outline that is easy to see, the printing target It is possible to easily form the display layer 8 without considering the unevenness of the surface, that is, the rear surface of the smoke layer 15, and thus the manufacturing cost of the display film 3 can be reduced.

Although the embodiments of the present invention have been described above with reference to the drawings, the specific configuration is not limited to these embodiments, and additions and modifications within the scope of the present invention may be made. included in the present invention.

For example, in the above embodiment, the patterned surface 9 formed on the surface of the transparent base material 5 is the patterned surface 9 with a hairline pattern or a spin pattern. A pattern, a vibration pattern, or the like may be used.

Further, in the display film 3 of the above embodiment, the half-mirror layer 7 is formed of a high-brightness aluminum film-forming material, but silver, gold, copper and other metals and oxides may also be used as film-forming materials. .

Furthermore, in the display device 1 of the above embodiment, the display layer 8 is formed in contact with the rear surface of the smoke layer 15. They may be provided separately.

Furthermore, in the display device 1 of the above embodiment, an LED lamp is used as the light source 11 of the light emitting means, but a laser light source may be used.

1 Display Device 2 Case 3 Display Film 4 Light Emitting Means 5 Transparent Base Material 6 Transparent Layer 7 Half Mirror Layer 8 Display Layer 8a Translucent Part 9 Pattern Surface 10 Alphabet Letters 11 Light Source (LED Lamp)
12 Light guide member 13 Hairline pattern (uneven pattern)
14 organic EL element (light emitting means, display layer)
15 Smoke layer 16 Dial 17 Spin pattern (uneven pattern)
18 Number 19 Point 22 Groove 24 Abrasive polishing belt

Claims (6)

A display film used in a display device that emits light to display a desired shape such as characters,
a sheet-shaped transparent substrate having translucency;
a half mirror layer provided on the back side of the transparent substrate;
a colored smoke layer provided on the back side of the half mirror layer;
a display layer provided on the back side of the smoke layer and capable of expressing a desired shape such as the character ;
with
Directly on the surface of the transparent base material, the polishing treatment is performed by an abrasive grain polishing machine in which the distance between the adjacent abrasive grains is uneven and the shape of the abrasive grains is formed unevenly. A display characterized by comprising a plurality of grooves parallel to each other , and forming a patterned surface in which the land width of the smooth land between the adjacent grooves and the groove width of the adjacent grooves are uneven Film for. 2. The display film according to claim 1, wherein the patterned surface formed on the transparent base material has a pattern of a predetermined number of groove groups arranged in parallel. 3. The display film according to claim 1 , wherein the half mirror layer is formed by vapor-depositing a metallic film-forming material on the back side of the transparent substrate. A display device that emits light to display a desired shape such as characters,
4. A display device having a display film according to any one of claims 1 to 3 , further comprising light-emitting means for emitting light in the desired shape on the back side of the display layer of the display film. 5. A display device having a display film according to claim 4 , wherein said light emitting means comprises a light source and a light guiding member which introduces light from said light source and emits surface light. 6. A display device having a display film according to claim 5 , wherein said light source is an LED lamp.

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