JPH07114352A - Display device - Google Patents

Abstract

PURPOSE: To enable visual confirmation in the environment of different quantity of light by providing 1st and 2nd transparent films, the layer of adhesive (viscous) agent and display layer. CONSTITUTION: This device has the 1st transparent film of a transparent film 10 of which one side 12 is flat and another side 11 has a recursive reflection element 13 having an angle in the form of trigonal pyramid while contacting the flat side 12 with one face 2 of the 1st transparent film, 2nd transparent film 20 of which a projecting part 23 is tightly adhered to the recursive reflection element 13 and a recessed part 22 forms a void 25 between the recursive reflection element 13 and a face 24 of the 2nd transparent film, layer 30 of the adhesive or viscous agent provided in contact with the 2nd transparent film 20, and display layer 40 stuck onto the layer 30 of the adhesive or viscous agent. When observing from the side of the 1st transparent layer, the quantity of light is increased for an indication 41 on the display layer 40 and it can be visually confirmed in such daytime having light incident from multiple direction but at night when the quantity of light is a little, it is difficult to visually confirm the indication 41 under a single light source.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device which changes its appearance in different environments, for example, day and night.

[0002]

2. Description of the Related Art JP-A-60-217302 discloses a display device in which glass spheres are evenly distributed on a reflective layer through a spacing layer, and a transparent surface protective layer on which a display is printed is superposed thereon. Is listed. Japanese Unexamined Patent Publication (Kokai) No. 2-27399 discloses a display device in which a retroreflective sheet cut into a desired pattern is attached to a base material.

In JP-A-60-232503, a pattern is formed by uniformly distributing glass spheres on a surface protective layer through a glass sphere fixing layer and depositing a reflector through a masked spacing layer. A display device formed with is described. However, neither of the above inventions is for improving visibility regardless of whether it is day or night, and is not intended to provide a display device in which the display that can be visually recognized is different in an environment where the light amount is different, for example, day and night. .

[0004]

However, there are cases in which it is necessary to provide different traffic information and advertisement / report information, for example, outdoors at daytime and at night. In this case,
It would be extremely convenient if different displays could be displayed for day and night without switching the display device between day and night.
Also, in the interior decoration device, it is convenient if the display can be changed in a simple manner by changing the amount of light reaching the observer.

Therefore, the present invention is intended to provide a display device which has different displays which can be visually recognized in an environment where the amount of light is different, for example, day and night.

[0006]

In order to solve the above problems, the present invention provides (1) a first transparent film, and (2) one surface 12 is flat and the other surface 11 has a triangular pyramid-shaped corner. A transparent film 10 having a retroreflective element 13, a flat surface 12 of which is in contact with one surface 2 of the first transparent film, and (3) a second transparent film 20, which is a valley portion. 22 and crests 23, the crests 23 are in close contact with the retroreflective element 13, and the troughs 22 are voids between the retroreflective element 13 and the surface 24 of the second transparent film. Film forming 25, (4) an adhesive or pressure-sensitive adhesive layer 30 provided in contact with the second transparent film 20, and (5) attached to the adhesive or pressure-sensitive adhesive layer 30. The display layer 40 has the display layer 40, and when viewed from the first transparent layer side, A display device characterized in that the display 41 in the layer 40 has a large amount of light and is visible in the daytime coming from multiple directions, but is difficult to see under a single light source at night with a small amount of light. It

Further, as another preferable aspect of the present invention,
As shown in FIG. 2, a second display layer having information different from that of the first display layer is provided on the first transparent film surface, or the first and second display layers are displayed. It is also possible to use a display device having a structure in which the display of the first and second display layers is changed to the same color, and the display of at least the first display layer covers the display of the second display layer. Is.

Furthermore, as a preferred aspect of the present invention, there is provided a display device in which the display device having the various configurations described above and an internally illuminating light source are combined. The daytime visibility of the first display can be further improved by combining the internally illuminated light sources. In the present invention, the internal light source is not particularly limited, and for example, one or more of a fluorescent lamp, an incandescent lamp, a xenon lamp, a halogen lamp, a light emitting diode and the like can be used.

[0009]

The operation principle of the display device of the present invention will be described. That is, in the display device of the present invention, in the area (a) where the void 25 is formed below the retroreflective element 13, the light incident from the first transparent film 1 side is the retroreflective element. Since most of the light cannot reach the display layer 40 and the display 41 because it is efficiently retroreflected by 13, the region (b) where the retroreflective element 13 and the second transparent film are in close contact with each other (b ),
Due to the retroreflective element 13, a considerable amount of light can reach the display layer 40 and the display 41 without retroreflection.

Therefore, an observer looking at the display device from the side of the first transparent film 1 visually recognizes the display layers 40 and 41 even in the day and night, for example, when the amount of light reaching the observer is different in the area (a). Can not do it. On the other hand, in the region (b), the amount of light is large and the amount of light reaching the observer after reaching the display layer 40 and the display body 41 in, for example, a daytime environment in which light is incident from any direction. Is sufficiently large, the display layer 40 and the display 41 can be visually recognized.

Further, in the area (h), the light amount is small, and only the light in a single direction is incident from the observer side. For example, in the environment at night, even if the light reaches the display layer 40 and the display 41, the observer further observes. As a result, the amount of light that reaches the display layer 40 and the display 41 are not visible because the amount of light that reaches the display layer 40 is very small. That is, it is possible to obtain a display device having a different display that can be visually recognized in an environment in which the amount of light reaching the observer is different, for example, day and night.

Therefore, by using such a principle, it is possible to easily obtain a display device capable of substantially changing the display content, erasing the display content, or embossing the display content in the environment where the light amount reaching the observer is different. It is possible.

[0013]

DETAILED DESCRIPTION Next, the present invention will be specifically described with reference to the drawings. In FIG. 1, 1 is a first transparent film, usually a plastic film such as acrylic, polycarbonate, ionomer, polyester,
It is composed of plastic films such as polyvinyl chloride, cellulose acetate butyrate, and polyolefin. The thickness of this film is 5 μm to 200 μm, preferably 2
It is 5 to 100 μm, and its transparency is appropriate at 70% or more, preferably 90% or more. The transparent film 10 is
One surface 12 is flat, and the other surface is a retroreflective element 1 comprising a large number of fine prisms having triangular pyramid-shaped corners.
3 is formed. The transparent film having this retroreflective element is made of acrylic, polycarbonate, ionomer, polyester, cellulose acetate butyrate or the like, and the transparency thereof is suitably 70% or more, preferably 90% or more. The refractive index is about 1.5 and the thickness is 2.5 mm or less, preferably 0.625 mm or less.
As the film having such a retroreflective element, for example, those described in JP-A-60-100103 can be used.

The second transparent film 20 has valleys 22 and peaks 23, the peaks 23 are in close contact with the retroreflective element 13, and the valleys are the retroreflective element 13 and the second reflective film 13. A space 25 is formed between the transparent film and the surface 24. The distance between the peak and the valley is 1 to 20 mm, preferably 1 to 10 mm in the region (a), and 5 μm to 10 in the region (b).
mm, preferably 5 μm to 2 mm and arranged, for example, in a regularly repeating manner. This configuration is, for example, the first transparent film 1 and the transparent film 1 having a retroreflective element.
No. 0 and the second transparent film are overlapped, and the second transparent film can be formed by thermocompression bonding so-called embossing. The second transparent film is usually a plastic film, and for example, a film of polyester, polycarbonate, acrylic, urethane or the like can be used. The thickness of this film is usually 5 μm to 200 μm.
m, preferably 12 to 100 μm. The transparency of the film is suitably 70% or more, preferably 90% or more.

The adhesive or pressure-sensitive adhesive layer 30 is formed by applying a conventional adhesive or pressure-sensitive adhesive such as an acrylic or urethane adhesive to the second transparent film formed as described above. To be done. The layer of the adhesive or pressure-sensitive adhesive is usually 5 μm to 200 μm, preferably 50 to 150 μm.
Having a thickness of. The adhesive or pressure-sensitive adhesive preferably has a transparency of 30% or more, and further has an adhesive strength of 1.0 kg / inch or more, preferably 2.0 kg / inch or more.

The display layer 40 may be a suitable film, for example, acrylic, polycarbonate, polyurethane, polyvinyl chloride, ionomer, polyester or the like, which is printed with a pattern or letters 41, for example, or a predetermined pattern or letter. And the like 41 may be cut out, and the adhesive layer 41 may be attached to a layer of an adhesive or a pressure-sensitive adhesive, and the protective layer 40 may be attached to the layer, or may be directly printed on the second transparent plastic 20. . Thickness is 5μm-200μ
If it is about m and transparency is required, its transparency is 30
% Or more is preferable.

According to another aspect of the present invention, in the first aspect shown in FIG. 1, a second display layer 60 can be provided outside the first transparent layer 1, and the display layer 60 has a predetermined size. , 61, for example, a pattern, a character, etc. The second display layer 60 may be a display film 60 provided with a predetermined display 61 by printing or the like, as in the case of the display layer 40. Alternatively, the first display 61 may be a cutout of the predetermined display 61. It may be constructed by sticking to a transparent plastic, or may be directly printed on the first transparent film 1. In this case, the display film or the protective film 60 needs to be transparent.

In this mode, the display 41 is visible through the area (h) in the daytime as described above, but it is difficult to see at night, whereas the display 61 is visible regardless of day or night. , Different day and night displays are provided.
That is, one display including both the display 41 and the display 61, for example, a pattern, a character, or the like is displayed in the daytime, whereas a display including only 61 is visually recognized at night. This one
As one application, if the displays 41 and 61 are configured with different hues, a display device that displays different colors for day and night can be obtained.

Further, if the display 41 is arranged over the entire surface of the display device and the displays 61 and 41 have the same hue, the display 41 can be visually recognized in the daytime, so that the display 61 of the same color cannot be discriminated and the nighttime is reduced. Since the display 41 cannot be visually recognized, the display 61 can be identified. That is, it is possible to obtain a display device in which the display is visible at night and the display is not visible at daytime. In the various aspects as described above, the light source for internal illumination, such as a fluorescent lamp, can be arranged behind the display layer 41. By doing so, the light of the internal light source that has passed through the display layer 40 is
Since it is possible to reach the first transparent film 1 through both the regions (a) and (b) in FIG. 1, the display 4 is displayed in a daytime environment where there is a large amount of light and light comes from multiple directions.
The visibility of 1 is further improved. In the case of the internal lighting type, both the display layers 60 and 40 need to be transparent.

[0020]

According to the present invention, it is possible to easily obtain a display device having different appearances in different environments, for example, daytime and nighttime.

[Brief description of drawings]

FIG. 1 is a schematic view of a cross section of a display device of the present invention.

FIG. 2 is a schematic cross-sectional view of a display device according to another embodiment of the present invention having display layers on both sides.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... First transparent film 10 ... Transparent film having a retroreflective element 13 ... Retroreflective element 20 ... Second transparent film 25 ... Void 30 ... Adhesive or pressure-sensitive adhesive layer 40 ... Display layer 41 ... Display 60 ... second display layer 61 ... second display

Claims (5)

[Claims] 1. A transparent film having (1) a first transparent film, and (2) a retroreflecting element having a flat surface on one surface and a triangular pyramid-shaped corner on the other surface, the flat surface being A film in contact with one surface of the first transparent film, (3) a second transparent film having a large number of valleys and peaks, the peaks being in close contact with the retroreflective element Cage,
The valley portion is a film that forms a space between the retroreflective element and the surface of the second transparent film, (4) of an adhesive or a pressure-sensitive adhesive provided so as to be in contact with the second transparent film. A display device, comprising: a layer; and (5) a display layer attached to the adhesive or pressure-sensitive adhesive layer. 2. The display device according to claim 1, wherein a second display layer is provided on the first transparent film surface. 3. The display device according to claim 1, wherein a second display layer is provided on the first transparent film surface, and the display color of the first display layer and the display color of the second display layer are different from each other. A display device having different display colors. 4. The display device according to claim 1, wherein a second display layer is provided on the first transparent film surface, and a second display layer is provided on the first transparent film surface. A display device having the same color and having a size such that at least a display on the first display layer covers a display on the second display layer. 5. A display device comprising a combination of the display device according to claim 1 and an internally illuminating light source.