JPH06110368A - Holographic display device - Google Patents

Abstract

PURPOSE:To obtain a holographic display device in which water resistance can be improved and also, wear resistance can be improved. CONSTITUTION:The holographic display device in which a hologram 1 is mounted on plate glass 4 by adhering the hologram 1 on the plate glass 4 by covering the hologram 1 with an adhesive layer 2 larger than the hologram 1 on a plate glass 4 plane, or adhering the hologram 1 on the plate glass with a double coated adhesive tape, and it is covered with a protective layer 3, and on which an image is displayed by irradiating the hologram 1 with light from a light source 6 for reproduction is comprised in such a way that the whole part protruding over the plate glass 4 up to the plate glass 4 plane from the upper plane of the protective layer 3 via the side plane is coated with a hard coating layer 5, or the upper plane of the protective layer 3 is covered with the hard coating layer 5, and the side plane of all the periphery of the hologram 1 can be sealed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a holographic display device in which a hologram is attached to a plate glass attached to a window glass for vehicles such as vehicles and a window for construction, and various images are displayed by a reproducing light source. .

[0002]

2. Description of the Related Art In recent years, attention has been paid to a hologram mounted on a rear window glass for an automobile and applied as a high mount stop lamp, and a hologram mounted on a front window glass for a head-up display. Although a number of proposals have been made, conventionally, when attaching a hologram to a plate glass, as shown in FIG. 4, the hologram 1 is adhered to the plate glass 4 with an adhesive 2 and the upper surface is protected by a protective layer 3. However, there is a possibility that the adhesive 2 may be peeled off because the adhesive strength between the glass and the adhesive film is reduced due to water infiltration from the periphery of the side surface. Moreover, although the protective layer has the function of protecting the hologram, it does not have sufficient abrasion resistance and has a drawback that it is easily scratched.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a holographic display device having improved water resistance and also improved abrasion resistance.

[0004]

According to the present invention, a hologram is coated on a plate glass surface with an adhesive layer larger than the hologram, and the hologram is adhered to the plate glass.
The hologram is attached to the plate glass by adhering the hologram with a double-sided adhesive tape, and the hologram is covered with a protective layer, and the hologram is irradiated with light from a light source for reproduction to display an image. The entire surface protruding from the plate glass from the top surface to the side surface to the plate glass surface is covered with a hard coat layer, or the top surface of the protective layer is covered with a hard coat layer to seal the entire peripheral side surface of the hologram. It is characterized by doing so.

[0005]

When the hologram is attached to the plate glass, at least the hard coat layer is coated on the uppermost surface, so that the abrasion resistance is improved, and the side faces of the entire peripheral portion of the hologram are coated with the hard coat layer or the sealing. Since it is sealed by the material, the invasion of moisture is prevented, and as a result, the adhesive strength is not lowered.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the drawings. 1 is a cross-sectional view of a main part showing a holographic display device according to a first embodiment of the present invention, and FIGS. 2 and 3 are cross-sectional views of main parts showing a hologram laminate according to the second and third embodiments of the present invention, respectively. FIG. 4 is a sectional view of a main part of a conventional hologram laminate.

Example 1 First, on a substrate such as polyethylene terephthalate (PET) or thin glass, a vinyl monomer such as pentaerythritol triacrylate, trimethylolpropane triacrylate or triethylene glycol diacrylate, methyl methacrylate and methacrylic acid. , Cellulose acetate succinate, saturated polymers such as polyvinyl alcohol, or mixtures with unsaturated polymers such as unsaturated polyether esters, as a main component, and if necessary, a sensitizer, a photopolymerization initiator, etc. Based on the conditions at the time of reproduction, a dry plate coated with the added mixture and irradiated with a laser beam or an ultraviolet ray to form a photopolymer as a sensitive material can be reproduced from two directions so that a red plate is reproduced. Irradiate light, interference fringes Are formed and then developed by an ordinary method to prepare a transmission type or reflection type hologram.

[0008] Next, as shown in FIG. 1, an LLumar Window Film (Martin Processing.I, Singapore) in which an adhesive 2 is coated on a hologram 1 obtained by peeling a substrate such as PET.
nc. Is laminated as a protective layer 3 and adhered to the plate glass 4 with a laminator.

The masking tape is adhered to the peripheral portion of the protective layer 3 of the plate glass 4 at a slight distance from the protective layer, and the protective layer 3 and the peripheral portion thereof are covered with water and a neutral detergent. After thoroughly washing with, and then drying it, lean this glass plate against an acrylic primer (not shown),
For example, PH91 made of Toshiba Silicone is applied on the protective layer 3 by a flow coating method and naturally dried at room temperature for 30 minutes.

Next, for example, a silicone type surface hardening agent Tosguard 510 (manufactured by Toshiba Silicone) is applied by a flow coating method, and naturally dried for about 30 minutes, and then at 120 ° C.
Heat treatment for about 30 minutes to cure the hard coat layer 5
And peel off the masking tape.

When light is emitted from a reproducing light source 6 such as a light emitting diode to a plate glass to which a hologram is adhered, when the hologram 1 is a reflection type, the eye 7 on the light source side causes the light source to be used. The image recorded by the opposite eye 7'is visible.

Further, a test of immersing this sample and the sample of the conventional structure in water for 24 hours and peeling them off with a nail was carried out. The conventional sample was easily peeled off, but the sample of the present invention did not peel off and was good. It showed excellent water resistance.

Further, such a hologram laminate and a conventional hologram sheet laminate having no hard coat layer were rubbed with paper for 100 times, and the haze value before and after the rubbing was measured to obtain the change rate. Although it is 0.5% or more, the hologram laminate of this example has a small value of 2.0, and it is understood that the abrasion resistance is remarkably improved.

Example 2 As a sensitive material, a dichroic gelatin was applied to a substrate such as a thin glass plate to prepare a transmission or reflection hologram by the same method as in Example 1, and the sensitive material and the substrate were separated. 2, the substrate is used as the protective layer 3 and is adhered to the plate glass 4 with an acrylic transparent adhesive, for example, a double-sided adhesive tape 2 ′ such as # 8625PW of Dainippon Ink and Chemicals. After that, for example, a silicone type surface hardening agent Tosguard 510 (manufactured by Toshiba Silicone) is applied by a flow coating method, and naturally dried for about 30 minutes.
A heat treatment is performed at 30 ° C. for about 30 minutes to cure the hard coat layer 5.

When the hologram laminate thus obtained is irradiated with light from the reproducing light source, the image recorded on the hologram is reproduced and displayed. Further, the water resistance and abrasion resistance were also good as in Example 1.

Example 3 A transmission type or reflection type hologram 1 produced by the same method as in Example 1 was applied to a dry plate coated with a photopolymer or the like as a sensitizing material, as shown in FIG.
A silicon-based resin, for example, Si coat 801 manufactured by Daihachi Chemical Industry Co., Ltd. is applied as a hard coat layer 5 on one surface of the ET film, and the hard coating layer 5 is adhered to the plate glass 4 with a film having an adhesive 2 coated on the other surface , Hologram and PE
The entire peripheral side surface of the T film is sealed with a transparent resin having excellent adhesiveness to glass such as an acrylic thermosetting resin or a urethane acrylate ultraviolet curing resin as the sealing material 8.

When the hologram laminated body thus obtained is irradiated with light from the reproducing light source, the image recorded on the hologram is reproduced and displayed. Further, the water resistance and abrasion resistance were also good as in Example 1.

Although the preferred embodiments have been described above, the present invention is not limited to these, and various applications are possible. Regarding the protective layer, as shown in Example 1, LLumar Window Film (Singapore, Martin Processing.In) was used.
c. Is preferable in that it protects the hologram from the solvent of the hard coat layer and has high rigidity, but a resin film such as PET can also be used.

As the hard coat layer, in addition to the hard coat layer of the embodiment, a transparent and curable hard coat layer can be adopted. As the light source for reproduction, various light sources such as a white light source, a halogen lamp, and a light emitting diode can be adopted, and the mounting place is not limited to the rear parcel, but can be provided on the roof or the like.

When a transmission hologram is used, the display device of the present invention is provided on a rear window glass for a vehicle to display a high mount stop lamp, a direction indicator, and various images (stereoscopic image, etc.). Not only that, it can be provided on architectural window glass, partition glass, and small-sized glass to display various images for decoration.
In the case of a reflection hologram, it is installed on the front window glass of a vehicle to be applied as a head-up display, a building window glass, a partition glass plate, or a small-sized plate glass to display various images for decoration. Can be displayed as.

[0021]

According to the holographic display device of the present invention, the abrasion resistance of the laminated body in which the hologram is attached to the plate glass is improved, the ingress of moisture is further prevented, and as a result, the adhesive force is not lowered. Therefore, in addition to those provided on various kinds of indoor glass, it is possible to provide various displays by irradiating light from a reproduction light source on the outside of window glass for vehicles such as vehicles and window glass for construction. It is possible.

[Brief description of drawings]

FIG. 1 is a sectional view of essential parts showing a holographic display device according to a first embodiment of the present invention.

FIG. 2 is a sectional view of a main part showing a hologram laminate according to a second embodiment of the present invention.

FIG. 3 is a sectional view of a main part showing a hologram laminate according to a third embodiment of the present invention.

FIG. 4 is a detailed cross-sectional view of a main part of a conventional hologram laminate.

[Explanation of symbols]

 1 hologram 2 adhesive 2'double-sided adhesive tape 3 protective layer 4 plate glass 5 hard coat layer 6 light source for reproduction 7, 7'th eye

Claims (2)

[Claims] 1. A hologram is attached to a plate glass by coating the hologram on the plate glass surface with an adhesive layer larger than the hologram and adhering the hologram to the plate glass, or by adhering the hologram with a double-sided adhesive tape, and further attaching the hologram to the plate glass. In the holographic display device that displays the image by irradiating the hologram with the light from the reproduction light source while covering the whole, the entire portion protruding from the plate glass through the side surface of the protective layer to the plate glass surface. A holographic display device having a sleeve coated with a hard coat layer. 2. A hologram is attached on a plate glass by coating the hologram on the plate glass surface with an adhesive layer larger than the hologram and adhering the hologram to the plate glass, or by adhering the hologram with a double-sided adhesive tape, and further attaching the hologram to the plate glass. In the holographic display device in which the hologram is irradiated with light from the reproduction light source to display an image, a hard coat layer is coated on the upper surface of the protective layer to seal the entire peripheral side surface of the hologram. A holographic display device characterized in that