JPH0648549Y2 - Display device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a display device, and more particularly to a display device capable of displaying two or more types by switching the type of irradiation light.

[Problems to be Solved by Conventional Techniques and Inventions] In recent years, various contrivances have been made to attract the attention of viewers in various advertisements such as product advertisements. Above all,
In order to avoid monotony due to a single still image, moving image display or scanning image display is adopted.

However, in order to display these moving images or scanned images, a complicated device configuration and complicated control are required.

Therefore, two types of displays are performed by switching the type of irradiation light, assuming that it is easier for the observer to pay attention than a single still image and does not require a complicated device configuration and control such as the above-mentioned moving image display or scanning image display. The method is adopted.

However, in the conventional method of this type, a desired display is formed by using a general color material that is visible by irradiation with visible light, and the desired inorganic phosphor is contained in the general color material that constitutes the display. Thus, general color display by visible light irradiation and fluorescent display by ultraviolet light irradiation are performed. Therefore, the two types of displays formed by switching the irradiation light are different in color but have substantially the same pattern, and therefore the function of attracting the observer's attention cannot be said to be sufficient and there is room for improvement.

The present invention has been made in view of the above-described conventional techniques, and an object of the present invention is to provide a new display device that can sufficiently attract the attention of an observer with a simple device configuration.

[Means for Solving the Problems] According to the present invention, in order to achieve the above object, the entire display screen is subdivided, and each of the divided large areas is divided into first, second and 3 are classified as belonging to any of the three types of display, and a large number of divided areas for each type of display are scattered over almost the entire display screen. A phosphor coloring material that emits light upon irradiation with short-wavelength ultraviolet light is attached to the above-mentioned region for display.
The area for display of the above type is provided with a phosphor color material that emits light by irradiation with long-wavelength ultraviolet light, and the area for display of the third type is a general color visible by irradiation of visible light. The display screen is provided with the first type display phosphor color material on the front side of the transparent substrate that absorbs the short wavelength ultraviolet light, and the second side on the back side of the display screen. And a general color material for display of the third type, and a short wavelength ultraviolet light source and a long wavelength ultraviolet light source are arranged on the front side of the transparent substrate. The front side of the transparent substrate and / or
Alternatively, a visible light source is disposed on the back side, and a display device is provided.

In one aspect of the present invention, the partitioned area is an elongated striped area, and the display areas of the first to third types are repeatedly arranged in a predetermined order.

In another aspect of the present invention, a shade is provided to prevent direct irradiation of the short wavelength ultraviolet light from the short wavelength ultraviolet light source to the front side.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic vertical sectional view showing a first embodiment of a display device according to the present invention. In this figure, the left side is the side where the observer is located (front side).

In FIG. 1, 2 is a device housing in which a display screen 4 is arranged and held so as to face an observer. The display screen has a transparent substrate made of acrylic resin, vinyl chloride resin, polyester resin, or the like, and three types of color materials attached to the front side and the back side of the substrate (described later).
Comprises and. 6 is a window made of a transparent member.

Inside the housing 2, on the front side of the display screen 4,
Three types of light sources, namely, a short-wavelength ultraviolet light source (so-called germicidal lamp having a dominant wavelength of emission at 254 nm) 8a, a long-wavelength ultraviolet light source (so-called black light lamp having a dominant wavelength of emission at 365 nm) 8b, and a visible light source. (White fluorescent lamp) 8c is arranged. These light sources are provided with reflectors 10a, 10b, 10c for reflecting each light and guiding it toward the display screen 4. Reference numeral 12 is a shade for preventing short-wavelength ultraviolet light emitted from the light source 8a from directly irradiating the observation side.

At the bottom of the housing 2, a control unit 14 including power supplies for the three types of light sources is arranged. The control unit controls the turning on and off of each of the light sources 8a to 8c in a desired manner.

FIG. 2 is a partial front view of the display screen 4.

The display screen 4 is subdivided into a large number of striped areas that are elongated in the vertical direction. The widths d of the striped areas are equal, and are, for example, 0.1 to 50 mm. These areas belong to one of the three types of display, and the area 5a for the first type display, the area 5b for the second type display, and the area 5c for the third type display are provided. It is repeated in this order and arranged.

In the first type display area 5a, a phosphor color material that emits light by short wavelength ultraviolet light emitted from the light source 8a is attached to the front side of the transparent substrate.

In the second type display area 5b, a phosphor coloring material that emits light by long-wavelength ultraviolet light emitted from the light source 8b is attached to the back surface side of the transparent substrate.

In the third type display area 5c, a general color material that is visible by the visible light emitted from the light source 8c is attached to the back side of the transparent substrate.

FIGS. 3 (a), (b), and (c) show the patterns of the entire display screen of the first type display, the second type display, and the third type display, respectively. As shown, the three types of display patterns are completely different from each other.

The first type display is, for example, red (R) -based, green (G) -based by irradiation of short wavelength ultraviolet light from the light source 8a,
Using a phosphor that emits blue (B) light, a desired display image is separated into three colors and applied to a portion corresponding to the first-type display area 5a so that a desired color is formed by the light emission. It can be obtained.

Examples of the phosphor for the first type display include: CaWO ₄ (Pb), etc. that emits red-based light emission, and LaPO ₄ : Ce, Tb that emits green-based light emission.
As an example of a substance exhibiting blue light emission, Y ₂ O ₃ : Eu and the like can be exemplified.

The second type display is, for example, red (R) -based, green (G) -based by irradiation with long-wavelength ultraviolet light from the light source 8b.
Using a phosphor that emits blue (B) light, a desired display image is separated into three colors and applied to a portion corresponding to the second-type display area 5b so that a desired color is formed by the light emission. It can be obtained.

Examples of the phosphor for the second type display include: YVO ₄ : Eu, Y ₂ O ₂ S: E, which emits red light.
u et al., Zn ₂ SiO ₄ : Mn,
(Zn, Cd) S: Cu, ZnS: Cu, etc. ・ Ca ₂ B ₅ O ₉ Cl: E is used as a material showing blue light emission.
u ²⁺ , BaMgAl ₁₄ O ₂₃ : Eu ^{2+ and the} like can be exemplified.

In the third type display, for example, using a general color material of cyan (C) type, magenta (M) type, and yellow (Y) type, the desired display image is separated into three colors, and the third type display area is obtained. It can be obtained by applying to the portion corresponding to.

General color materials for the third type display include: cyan color materials such as frocyanine color materials, yellow color materials such as Heisa yellow, naphthol yellow, azo color materials, and magenta color materials. Examples thereof include permanent red, quinacridone-based coloring material, and azo-based coloring material.

The various coloring materials (phosphors and general coloring materials) as described above are prepared, for example, in the ink having the following composition and applied on the surface of the transparent substrate by the silk screen method or other printing method.

Binder (acrylic, vinyl chloride, etc.): 30 to 100 parts by weight Solvent (toluene, cyclohexane, etc.): 5 to 50 parts by weight Dispersant: 0.01 to 10 parts by weight Coloring material (phosphor or general coloring material): 1 to 200 parts by weight When the light source 8a is turned on, the entire first type display area 5a of the display screen 4 is displayed.
The phosphor of FIG. 3 emits light, and the type 1 display shown in FIG. 3 (a) is made, which is visually recognized. Although the first-type display is actually performed only in the display area 5a, the expansion of the display due to light emission is realized, and the width d of each display area is sufficiently small, so that the display is substantially visible. The desired color display substantially as shown in FIG. 3 (a) is realized. Further, since the short-wavelength ultraviolet light is absorbed by the transparent substrate that constitutes the display screen 4, the phosphor of the second type display area 5b on the back surface side does not emit light.

When the light source 8b is turned on, the entire second type display area 5b of the display screen 4 is displayed.
The phosphor of FIG. 3 emits light, and the second type display shown in FIG. 3B is made, which is visually recognized. Although the second type display is actually performed only in the display area 5b, the expansion of the display by light emission is realized, and the width d of each display area is sufficiently small, so that the display is substantially visually. The desired color display substantially as shown in FIG. 3 (b) is realized.

When the light source 8c is turned on, all the third type display areas 5c of the display screen 4 are displayed.
With the general color material, the third type display shown in FIG. 3C is visually recognized. Actually, the third type display is made only in the display area 5C, but since the width d of each display area is sufficiently small, it is visually substantially shown in FIG. 3 (c). A sufficiently practical desired color display is realized.

FIG. 4 is a schematic vertical sectional view showing a second embodiment of the display device according to the present invention. In this figure, the same members as those in FIG. 1 are designated by the same reference numerals.

This embodiment is different from the first embodiment in that the display screen 4 is moved to the observer side and the visible light source 8c and the reflector 10c are arranged on the back surface side of the display screen 4. By performing the third type display in the light transmission format as in the present embodiment, the first type display is performed.
A display having a different taste from that of the above embodiment can be obtained.

In the above embodiment, the display screen 4 is subdivided into a large number of vertically elongated striped areas. However, the present invention is not limited to this, and the subdivisions of the display screen are not limited to this, and a large number of elongated strips can be formed in the horizontal or diagonal direction. Of stripes, or may be partitioned in both the up-down direction and the left-right direction to form a large number of dot-shaped areas. Furthermore, the areas of each type of display do not necessarily have to be evenly wide, and may be different depending on the desired visibility.

[Effects of the Invention] As described above, according to the present invention, the entire display screen is subdivided and a large number of divided areas for two types of display are scattered over almost the entire surface of the display screen. Allowing selective color display with color materials for display of types 3
By a simple control of simply switching the lighting of various types of light sources, three types of displays having completely different patterns and colors can be obtained over the entire display screen, and the function of attracting the viewer's attention is extremely high.

Further, in the present invention, the first type display phosphor color material is attached to the front side of the transparent substrate that absorbs short-wavelength ultraviolet light, and the second type display phosphor color material is attached to the back side. Also, since the short wavelength ultraviolet light source is arranged on the front side of the transparent substrate, the short wavelength ultraviolet light is absorbed by the transparent substrate when the short wavelength ultraviolet light source is turned on, and the second type on the back side is provided. It is possible to perform good first-type display by not emitting light from the display phosphor color material, and only emitting light from the front-side first display phosphor color material.

[Brief description of drawings]

FIG. 1 is a schematic vertical sectional view showing a first embodiment of a display device according to the present invention. FIG. 2 is a partial front view of the display screen. 3 (a), (b), and (c) are the first type display,
It is a figure which shows the pattern of the whole display screen of a 2nd type display and a 3rd type display. FIG. 4 is a schematic vertical sectional view showing a second embodiment of the display device according to the present invention. 2: Housing, 4: Display screen, 5a to 5c: Display area, 6: Window, 8a to 8c: Light source, 10a to 10c: Reflector, 12: Shade, 14: Control part.

Front page continuation (72) Inventor Masahiro Hojo 1311-1-726, Taio-cho, Kohoku-ku, Yokohama-shi, Kanagawa (56) References JP-A-60-263188 (JP, A) JP-B 41-13348 (JP, B1) )

Claims (3)

[Scope of utility model registration request] 1. The entire display screen is subdivided, and each of the subdivided regions is divided into first, second and third areas.
Are classified as belonging to one of the three types of displays, and a large number of compartments for each type of display are scattered over almost the entire display screen, A phosphor coloring material that emits light when irradiated with short-wavelength ultraviolet light is attached to the region.
The area for display of the above type is provided with a phosphor color material that emits light by irradiation with long-wavelength ultraviolet light, and the area for display of the third type is a general color visible by irradiation of visible light. The display screen is provided with the first type display phosphor color material on the front side of the transparent substrate that absorbs the short wavelength ultraviolet light, and the second side on the back side of the display screen. And a general color material for display of the third type, and a short wavelength ultraviolet light source and a long wavelength ultraviolet light source are arranged on the front side of the transparent substrate. The front side of the transparent substrate and / or
Alternatively, the display device is characterized in that a visible light source is arranged on the back side. 2. The partition area is an elongated stripe area, and the display areas of the first to third types are repeatedly arranged in a predetermined order.
Display device described in 3. The display device according to claim 1, further comprising a shade for preventing direct irradiation of short wavelength ultraviolet light from the short wavelength ultraviolet light source to the front side.