JPH11249605A - Light emitting display panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light emitting display panel having high luminance and long afterglow time by adopting a structure for improving the luminance. SOLUTION: This light emitting display panel is constituted by forming a light emitting layer 2, for which a lot of fine spherical substances are mixed into light emitting materials, on a substrate 1. Even when the display panel is thinned rather than conventional one using light storage light emitting painting, sufficient lightness can be provided by this light emitting layer 2. Thus, the thinned component in the thickness of the light emitting layer 2 can reduce the number of times of printing for forming the light emitting layer 2. Besides, the light emitting layer 2 is for over all the rear surface of a light transmission substrate having light transmittance or at one pot of it and when a reflecting layer for light is provided, stereoscopic illumination can be performed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display panel used for a timepiece, a meter, a guide panel, and the like, and more particularly to a light emitting display panel which emits light partially or entirely by using a light emitting material. It is. The present invention also relates to a solar clock dial for a watch in which the basic configuration of the light emitting display panel corresponds to a clock using a solar cell as a power supply, or a liquid crystal display panel having a basic configuration of the light emitting display panel as a backlight. The present invention also relates to a light emitting sheet that can be adhered to the display panel or the like.

[0002]

2. Description of the Related Art Conventionally, as a technique for displaying a timepiece dial by using a phosphorescent light emitting material, Japanese Patent Laid-Open Publication No.
There is one disclosed in Japanese Patent No. 5958. This timepiece dial is formed by applying a white paint on the entire upper surface of the substrate, forming a layer of a luminous paint having a luminous base of aluminum strontium oxide thereon, and further forming a mark or mark on the surface of the luminescent paint layer. A time scale and the like were formed.
Luminescent luminous paint used for this watch dial,
This is a paint obtained by mixing a luminescent agent having aluminum strontium oxide as a luminescent substrate with a thermosetting binder. In such a paint, the luminance was high and the afterglow time of about 8 hours was obtained.

There is also a display device with luminous paint disclosed in Japanese Patent Application Laid-Open No. 7-287541. In this display device, a base coat serving as a light reflection layer is placed on a dial base, and a base coat is placed thereon. Luminescent luminous paint is screen-printed, and a translucent film is further placed thereon, and a printing ink portion for displaying a brand name, a time character, and the like is formed on the film. Luminescent luminous paint in this display device,
It is the same as that of the conventional timepiece dial described above, and has almost the same light emission performance.

[0004]

The luminous paints of the prior art described above require a time period of up to several tens minutes (8 hours) to reach saturation excitation.
It takes a long time (approximately 20 minutes under 00 lux), and a sufficient initial luminance cannot be obtained unless the device is left in a bright place for a long time.

[0005] Although the brightness is high and the afterglow time is long, a film thickness of about 100 µm or more is required to secure sufficient brightness for use in a timepiece dial or the like. . In order to increase the thickness of the coating film, it is necessary to print the light emitting layer at least two to three times to form a layer that emits light, thereby increasing the number of steps and increasing the cost.

The present invention employs a structure for increasing the luminance of the light-emitting layer and uses a high-luminous material having high-speed excitation, high luminance, and low attenuation to maintain high luminance even when the light-emitting layer is thin. An object of the present invention is to provide a light-emitting display panel having a long light time, a solar clock for a watch, a liquid crystal display panel, and a light-emitting sheet.

[0007]

According to a first aspect of the present invention, there is provided a light-emitting display panel according to the present invention, wherein a light-emitting layer in which a transparent fine spherical body is dispersed and mixed in a light-emitting material is formed on the whole or a part of the surface of the substrate. It is.

The light emitting display panel according to the second aspect of the present invention is characterized in that a light emitting layer in which a transparent fine spherical body is dispersed and mixed in a light emitting material is provided on the whole or a part of the back surface of a light transmitting substrate. It is formed and provided with a light reflection layer.

According to a third aspect of the present invention, there is provided a light emitting display panel, wherein a light diffusion layer is formed between the light emitting layer and the reflective layer.

[0010] The spherical body in the light emitting display panel of the present invention described in claim 4 partially protrudes from the surface of a portion containing the light emitting material of the light emitting layer, and the protrusion amount is 30 µm or less. is there.

The spherical body in the light emitting display panel according to the present invention described in claim 5 is obtained by randomly mixing and mixing a large number of particles having various particle diameters.

The light emitting layer in the light emitting display panel of the present invention according to claim 6, wherein the volume ratio of the binder is 1, the light emitting material is 0.3 to 0.6, and the spherical body is 0.2 to 0.2.
It is formed by printing with ink mixed at a ratio of 0.5.

The light emitting layer in the light emitting display panel of the present invention described in claim 7 is formed in a dot shape or a grid shape.

The light-emitting material in the light-emitting display panel of the present invention described in claim 8 is a compound represented by the general formula (SrEu) Al ₂ O _4. [(SrEu) Onn (Al _1-ab B _b Q)
_a ) ₂ O ₃ (OH)] [wherein Q is Bi, Ca, Mg, M
n is at least one selected from n, and a is 0.0
005 ≦ a ≦ 0.002, and b is 0.001 ≦ b
.Ltoreq.0.35, and n is 1≤n.ltoreq.7].

According to a ninth aspect of the present invention, there is provided a timepiece solar dial according to the first aspect of the present invention, wherein the substrate is formed of a translucent substrate.

According to a tenth aspect of the present invention, there is provided a solar clock dial for a timepiece, wherein a light diffusion layer is formed between the light emitting layer and the substrate.

In the solar clock dial for timepiece of the invention according to the eleventh aspect, the spherical body partially protrudes from the surface of a portion of the light emitting layer containing the light emitting material, and the protrusion amount is 30 μm or less. Things.

In the twelfth aspect of the present invention, the spherical body of the solar dial for a timepiece of the present invention is obtained by randomly mixing a large number of particles having various particle diameters and dispersing them.

The luminescent layer in the solar dial for a timepiece according to the present invention according to claim 13, wherein the binder is 1, the luminescent material is 0.3 to 0.6, and the sphere is 0 in volume ratio. It is formed by printing with ink mixed at a ratio of 0.2 to 0.5.

In the solar clock dial for a timepiece according to the present invention, the light emitting layer is formed in a dot shape or a grid shape.

The luminescent material in the solar dial for a timepiece of the invention according to the fifteenth aspect has a general formula (SrEu) Al ₂ O _4. [(SrEu) Onn (Al _1-ab B _b Q)
_a ) ₂ O ₃ (OH)] [wherein Q is Bi, Ca, Mg, M
n is at least one selected from n, and a is 0.0
005 ≦ a ≦ 0.002, and b is 0.001 ≦ b
≦ 0.35, and n is 1 ≦ n ≦ 7].

The liquid crystal display panel according to the present invention comprises a first transparent glass substrate having an upper polarizing plate formed on the front surface and a second transparent glass substrate having a lower polarizing plate formed on the back surface. Opposingly disposed, forming a segment electrode and a common electrode on opposing inner surfaces of the first and second transparent glass substrates,
An alignment film for aligning liquid crystal molecules is formed on the segment electrode and the common electrode, and while maintaining an interval with a spacer,
A liquid crystal substrate in which liquid crystal is sealed between the first and second transparent glass substrates with a sealing member; and a backlight comprising a light emitting layer in which a transparent fine spherical body is dispersed and mixed in a light emitting material. is there.

The liquid crystal display panel of the present invention described in claim 17 is provided with a reflective layer on the back surface side of the light emitting layer.

[0024] The liquid crystal display panel of the present invention according to claim 18 is provided with a light diffusion layer between the light emitting layer and the reflective layer.

In the liquid crystal display panel of the present invention described in claim 19, the spherical body partially protrudes from the surface of the light emitting layer containing the light emitting material, and the protrusion amount is 30 μm.
m or less.

In the liquid crystal display panel of the present invention described in claim 20, the spherical body is obtained by randomly mixing a large number of particles having various particle diameters and dispersing them.

[0027] In the liquid crystal display panel of the present invention according to the twenty-first aspect, the light-emitting layer has a volume ratio of 1% binder.
The luminescent material is formed by printing with an ink containing 0.3 to 0.6 of the luminescent material and 0.2 to 0.5 of the sphere.

In the liquid crystal display panel according to the present invention, the light emitting layer is formed in a dot shape or a grid shape.

The light emitting material in the liquid crystal display panel of the present invention according to claim 23 is a compound represented by the general formula (SrEu) Al ₂ O _4. [(SrEu) Onn (Al _1-ab B _b Q)
_a ) ₂ O ₃ (OH)] [wherein Q is Bi, Ca, Mg, M
n is at least one selected from n, and a is 0.0
005 ≦ a ≦ 0.002, and b is 0.001 ≦ b
.Ltoreq.0.35, and n is 1≤n.ltoreq.7].

The luminescent sheet of the present invention according to claim 24 is provided with a luminescent layer in which a transparent fine sphere is dispersed and mixed in a luminescent material, between an overcoat layer and an adhesive layer.

The luminescent sheet according to the present invention described in claim 25 is provided with a luminescent layer in which a transparent fine sphere is dispersed and mixed in a luminescent material, between an overcoat layer having a light-transmitting property and an adhesive layer. The entire surface or a part of the reflective layer is provided.

In the luminescent sheet according to the present invention, a luminescent layer in which a transparent fine sphere is dispersed and mixed in a luminescent material is provided between an overcoat layer and a translucent adhesive layer. The reflection layer is provided on the entire back surface or a part of the reflection layer.

A luminescent sheet according to the present invention described in claim 27 is one in which a light diffusion layer is formed between the luminescent layer and the reflective layer.

In the luminescent sheet of the present invention described in claim 28, the spherical body partially protrudes from the surface of the portion containing the luminescent material of the luminescent layer, and the projection amount is 30 μm or less. .

In the luminescent sheet of the present invention described in claim 29, the spherical body is formed by randomly mixing and mixing a large number of particles having various particle diameters.

The luminescent layer of the luminescent sheet according to the present invention as described in claim 30, wherein the binder is 1, the luminescent material is 0.3 to 0.6, and the spherical body is 0.1 to 0.8 in volume ratio.
It is formed by printing with ink mixed at a ratio of 2 to 0.5.

In the luminescent sheet according to the present invention, the luminescent layer is formed in a dot shape or a grid shape.

The light-emitting material of the light-emitting sheet of the present invention according to claim 32, has a general formula (SrEu) Al ₂ O _4. [(SrEu) Onn (Al _1-ab B _b Q)
_a ) ₂ O ₃ (OH)] [wherein Q is Bi, Ca, Mg, M
n is at least one selected from n, and a is 0.0
005 ≦ a ≦ 0.002, and b is 0.001 ≦ b
.Ltoreq.0.35, and n is 1≤n.ltoreq.7].

[0039]

BEST MODE FOR CARRYING OUT THE INVENTION The light-emitting display panel according to the first aspect of the present invention illuminates with a light-emitting layer formed by blending a transparent fine sphere with a light-emitting material. By blending such a transparent and minute sphere, light from the light emitting material is emitted toward the surface through the sphere. As described above, light from a portion where the spherical body and the light emitting material are in contact with each other in the light emitting layer can also be radiated in the surface direction, so that the light emitting surface area can be increased and the luminance can be significantly increased. Even if the thickness of the layer is reduced, sufficient brightness can be obtained. Therefore, the number of printings for forming the light emitting layer can be reduced by the thinner the thickness of the light emitting layer.

In the light-emitting display panel according to the second aspect of the present invention, a light-emitting layer formed by mixing a transparent fine spherical body with a light-emitting material is provided on the back surface of a light-transmitting substrate. And a reflective layer is provided to further increase the luminance. By illuminating from the rear surface side of the light-transmitting substrate in this way, illumination with a three-dimensional effect can be provided, and the degree of freedom of arrangement of time characters and the like provided on the substrate front surface side can be increased, and the appearance can be improved. it can.

In the light-emitting display panel, a light diffusion layer is provided between the light-emitting layer and the reflection layer, and the light emitted to the back side of the light-emitting layer is diffused by the diffusion layer. And
Further, the light is reflected in the surface direction by the reflection layer, so that the light emitted in the surface direction is increased and the luminance can be increased.

Further, as described in claim 4, the above-mentioned spherical body partially protrudes from the surface of the portion containing the luminescent material. Since the spherical body partially protrudes from the surface of the portion containing the light emitting material, light generated inside the light emitting material can be effectively radiated outward through the spherical body. The amount of protrusion of this spherical body is 3
The thickness is set to 0 μm or less, which makes it impossible to visually confirm the spherical body. Therefore, the surface of the light emitting layer does not look like a rough surface with irregularities due to the spherical body,
It is possible to prevent a decrease in appearance quality. Furthermore, as described in claim 5, by randomly mixing the spherical bodies having various particle diameters, the spherical bodies can be uniformly dispersed in the light emitting layer. Further, as described in claim 6,
The light-emitting layer is formed by printing with an ink in which the binder is 1 and the light-emitting material is 0.3 to 0.6, and the sphere is 0.2 to 0.5 in volume ratio. Yes,
By blending the spherical body and the light emitting material in this ratio, it is possible to improve the luminance and secure a sufficient viscosity of the light emitting layer.

In the light-emitting display panel, since the light-emitting layer is formed in a dot shape or a lattice shape, the surface of each dot or rectangular portion is raised and rounded. It becomes a curved surface. Therefore, the light emitting surface area can be increased as compared with the case where the light emitting layer is formed flat, and the luminance can be increased.

Further, the light emitting material contained in the light emitting layer of the light emitting display panel is made of a high light emitting material having high speed excitation, high luminance and low attenuation. The light-emitting layer in which this high light-emitting material is blended has high-speed excitation,
Since it has high luminance and low attenuation, sufficient brightness can be obtained even if the thickness is further reduced.

On the other hand, in the light-emitting display panel,
As described in (1), when the substrate is made of a material having a light-transmitting property, external light incident from the front side is transmitted to the back side. This makes it possible to use it as a solar dial placed on the front side of the solar cell. In this case, as described in claim 10, by providing a diffusion layer between the light emitting layer and the substrate, it is possible to diffuse external light and irradiate the solar cell in a uniform state. Power generation efficiency can be improved. Also in this solar dial, as described in claim 11, the spherical body protrudes from the portion of the light-emitting layer containing the luminescent material, or as described in claim 12, spherical bodies of various particle sizes are used. By mixing the light-emitting material and the sphere at a predetermined volume ratio as described in claim 13, the light-emitting luminance can be effectively increased, and the printing can be made easier. It is possible. Further, also in this solar dial, it is possible to increase the luminance by forming the light emitting layer in a dot shape as described in claim 14, and to increase the speed of the light emitting material as described in claim 15. By using a high light emitting material having excitation, high luminance, and low attenuation, a light emitting layer having high speed excitation, high luminance, and low attenuation can be formed.

Further, in the liquid crystal display panel according to the present invention, a backlight comprising a light emitting layer in which a transparent fine spherical body is mixed with a light emitting material is provided on the back side of the liquid crystal substrate. Since the light emitting layer contains a spherical body as described above, the light emitting layer has a high brightness even if it is thin, illuminates the liquid crystal substrate with sufficient brightness from the back surface side, and prints the light emitting layer on the back surface of the liquid crystal substrate by printing. Since it is formed, it does not hinder the thinning of the liquid crystal display panel. Further, by providing a reflective layer on the back surface side of the light emitting layer, it is possible to further increase the luminance. Further, as described in claim 18, by providing a diffusion layer between the reflection layer and the light emitting layer, light emitted from the light emitting layer to the back side is also diffused and reflected in the surface direction, so that efficient It is possible to uniformly illuminate the liquid crystal substrate. Also in this liquid crystal display panel,
According to a ninth aspect, the spherical body protrudes from a portion containing the luminescent material of the luminescent layer, or as described in the twentieth aspect,
22. Spherical bodies of various particle sizes are randomly mixed,
As described in the above, by mixing the luminescent material and the spherical body at a predetermined volume ratio, the emission luminance is effectively increased, and
It is possible to make printing easier. Further, also in this liquid crystal display panel, it is possible to increase the luminance by forming the light emitting layer in a dot shape or the like as described in claim 22, and to increase the speed of the light emitting material as described in claim 23. By using a high light emitting material having excitation, high luminance, and low attenuation, a light emitting layer having high speed excitation, high luminance, and low attenuation can be formed.

On the other hand, the luminescent sheet according to the twenty-fourth aspect of the present invention has a luminescent layer in which a transparent fine sphere is mixed with a luminescent material is provided between the overcoat layer and the adhesive layer. The overcoat layer is provided to seal the light emitting layer to prevent deterioration due to moisture, and the adhesive layer is provided so as to be easily adhered to an adherend. Further, the light-emitting layer has a high brightness even if it is thin because it contains a spherical body, as in the case of the above-described light-emitting display panel or the like. Even if the light-emitting layer is thin, sufficient brightness can be obtained. Since the thickness of the layer is small, the number of printings for forming the light emitting layer can be reduced.

The luminescent sheet according to the twenty-fifth aspect of the present invention is provided with a reflective layer for reflecting light in the direction of the overcoat layer between the translucent overcoat layer and the adhesive layer. The entire surface or a part of the surface of the reflective layer facing the overcoat layer is provided with a light emitting layer in which a transparent fine spherical body is mixed with the above light emitting material. In this light emitting sheet, the light from the light emitting layer, the external light reflected by the surface of the reflective layer, and the light from the light emitting layer are all radiated through the overcoat layer, so that the luminance can be increased.

Further, in the luminescent sheet according to the twenty-sixth aspect of the present invention, a reflective layer for reflecting light in the direction of the adhesive layer is provided between the overcoat layer and the translucent adhesive layer,
Further, a light-emitting layer in which a transparent fine spherical body is blended with the above-described light-emitting material is provided on the whole or a part of the back surface of the reflective layer facing the adhesive layer. Also in this light emitting sheet, since the light from the light emitting layer, the external light reflected by the surface of the reflective layer, and the light from the light emitting layer are all radiated in the adhesive direction via the adhesive layer, the brightness can be increased.

Also, in the light emitting sheet, a light diffusion layer is provided between the light emitting layer and the reflection layer, and the light emitted from the light emitting layer is diffused by the diffusion layer. Further, by reflecting the light on the reflection layer, the emitted light is increased and the luminance is increased.

Also in the light emitting sheet, as described in claim 28, the spherical body may be protruded from a portion containing the light emitting material of the light emitting layer. By mixing the light-emitting material and the sphere at a predetermined volume ratio as described in claim 30, the light-emitting luminance can be effectively increased, and the printing state can be improved. It is possible. Further, also in this light emitting sheet, it is possible to increase the luminance by forming the light emitting layer in a dot shape or the like as described in claim 31, and to excite the light emitting material at high speed as described in claim 32. By using a high-luminous material having high luminance and low attenuation, a light-emitting layer having high-speed excitation, high luminance, and low attenuation can be formed.

[0052]

FIG. 1 is a sectional view showing the structure of a light emitting display panel according to a first embodiment of the present invention. In the present embodiment and other embodiments described later, a timepiece dial is described as an example, but the present invention is not limited to a timepiece dial.

The light emitting display panel in this embodiment has a metal substrate 1 on which a foot 1a is attached on the back surface, a surface pattern is formed and plated, and a metal substrate 1 is formed on the surface of the substrate 1. And a clear layer 13 formed by applying a clear coating on the surface of the substrate 1 so as to cover the light emitting layer 2.

The light-emitting layer 2 in this embodiment has a time character 2a,
The mark 2b and the like are formed, and are formed by pasting or printing in the shape of a time character, a mark, or the like.

The light-emitting layer 2 in this embodiment is formed by screen-printing a fine and transparent spherical body 3 made of glass beads of various sizes, together with a light-emitting material. Things. When the spherical body 3 is compounded as described above, the amount of the light emitting material is 0.1 to 1 for the binder such as acrylic resin in terms of volume ratio.
It is optimal to mix the spheres at a ratio of 3 to 0.6 and the spheres at a ratio of 0.2 to 0.5.

The particle size of the spherical body 3 does not need to be particularly limited. However, for the spherical body 3 b having a large particle diameter, it is desirable to select the maximum particle size in relation to the thickness of the light emitting layer 2. . That is, as the particle size of the spherical body 3 increases, the surface area increases accordingly, and the contact surface with the luminescent material increases, so that the luminescent area can be increased.
The amount of protrusion from the portion containing the luminescent material increases,
They will be visually recognized, leading to a reduction in appearance quality. In general, since the size that can be visually recognized by human eyes is about 30 μm or more, when the protrusion amount of the spherical body 3 from the portion containing the high light emitting material of the light emitting layer 2 becomes 30 μm or more, spots on the surface of the light emitting layer 2 Are visually recognized, and the appearance quality is significantly reduced. Therefore, it is preferable to select the maximum particle diameter of the spherical body 3 so that the protrusion amount of the spherical body 3 is suppressed to 30 μm or less.

Further, it is preferable that a large number of the spherical bodies 3 having various particle sizes are mixed. This is because, by using the spherical bodies 3 having various particle sizes of large and small, the spherical bodies 3a having small particle diameters are used.
Into the gap between the large spherical bodies 3b,
Can be uniformly dispersed. In addition, by blending spherical bodies 3 of various sizes, large and small, the light emitting layer 2
The contact between the spherical bodies 3 in the inside also increases, and light emitted to the outside through the contact portion can be increased. Further, since the light is dispersed and emitted in each direction by the spherical bodies 3 having various particle sizes of large and small, the light emitted from the light emitting layer 2 is scattered without being partially concentrated, and light is emitted uniformly.
The particle diameter of the spherical body 3a having a small particle diameter is not particularly limited, but is preferably at least 2 μm or more in consideration of the light scattering effect.

As a method for projecting the spherical body 3 from the surface of the light emitting layer 2, the surface of the light emitting layer 2 is hit by a sand blast method, a soft resin portion is repelled to project the hard spherical body 3, or a chemical etching is performed. There is a method in which the resin on the surface of the light emitting layer 2 is melted by a method to make the spherical body 3 protrude.

On the other hand, various light-emitting materials can be used as the light-emitting material in the present embodiment. In particular, it is most preferable to use the following high light-emitting materials. That is, the high luminescent material is composed of a strontium compound and an α-type A
It is a compound selected from at least one of l ₂ O ₃ , γ-type Al ₂ O ₃ , boron compound, europium compound, bismuth compound, magnesium compound and manganese compound. Then, the raw material is pulverized, and at least one of the raw materials is acid-treated, all the raw materials are mixed, and the mixture is slowly heated from 400 ° C. to 1600 ° C. for 7 hours to 10 hours in the presence of the carbonaceous material. The temperature was raised, and then calcined at 1250 ° C. to 1600 ° C. for 5 hours to 3 hours, and then cooled to 200 ° C. over 7 hours to 10 hours, and pulverized.
It is obtained by classification. The highly luminescent material obtained through such a manufacturing process is represented by the general formula (SrE
u) Al ₂ O _4. [(SrEu) Onn (Al _1-ab B
_b Q _a ) ₂ O ₃ (OH)] [wherein Q is Bi, Ca,
At least one selected from Mg and Mn;
Is 0.0005 ≦ a ≦ 0.002, and b is 0.
001 ≦ b ≦ 0.35, and n is 1 ≦ n ≦ 7].

Usually, this high luminescent material is in the form of a powder, and is used by being mixed with a synthetic resin or the like to be molded. For example, an ink can be formed by dispersing and blending a powdery high light emitting material into a binder of a transparent thermosetting resin, and the ink can be formed into a desired shape by screen printing using the ink. The light emitting layer 2 shown in FIG. 1 is formed in the shape of a time character or a mark by screen printing on the surface of the substrate 1 with an ink containing such a high light emitting material and the spherical body 3. In addition, the light emitting layer 2 in the present embodiment
Is set in the shape of the hour character 2a or the mark 2b,
It is also possible to print on the entire surface or a part of the surface of the substrate 1, and its shape and arrangement can be arbitrarily changed.

The ink containing such a high light-emitting material is obtained by dissolving a solid acrylic resin with a solvent and mixing the high light-emitting material with the solid acrylic resin. Set in relation. At that time, if the amount of the high luminescent material is too large, the resin content is too small, and the thixotropy is increased, so that the printing is blurred or peeled off. On the other hand, if the amount of the high luminescent material is too small, the amount of the resin becomes too large, and bleeding occurs in printing. Therefore, it is optimal to mix the high luminescent material and the spherical body 3 within the above-described range of the mixing ratio.

Further, since the high light emitting material in this embodiment emits light yellow green light, the ink obtained by dispersing and blending this high light emitting material in a transparent resin also emits light yellow green light. Therefore, when it is desired to change the emission color of the light emitting layer 2,
By adding a pigment of a desired color to the ink, it becomes possible to emit light of a desired color.

On the other hand, in this embodiment, the metal substrate 1 is used. However, by using a substrate made of aluminum or the like having a high light reflectance, the surface of the substrate can be formed without plating. The light emitting layer 2 can be formed directly on the substrate. When a metal substrate having low reflectance or a plastic substrate that transmits light is used, a light reflection layer made of a material having high reflectance such as white paint is provided on the back side of the light emitting layer 2. Thereby, the light emission luminance can be increased.

The clear layer 13 is provided for the purpose of increasing the gloss of the surface of the substrate 1 and the like to give the three-dimensional appearance of the light emitting layer 2 and for protecting the surface of the display panel.

In the light emitting display panel of the present embodiment having the above structure, not only light emitted from the surface of the light emitting layer 2 but also light emitted inside the light emitting layer 2 protrudes from the surface of the light emitting layer 2. Released via the sphere 3. In this manner, light received from the periphery of the spherical body 3 can be emitted toward the surface of the light-emitting layer 2 through the spherical body 3, so that the light-emitting layer 2 is equivalent to the surface area of the spherical body 3. Can increase the light emission area. In addition, since natural light from the outside or light from an artificial light reaches not only the surface of the light emitting layer 2 but also the inside of the light emitting layer 2 through the spherical body 3, the light is evenly applied to the inside and the outside of the light emitting layer 2. And the efficiency of light accumulation / emission can be improved.

Table 1 shows changes in the afterglow luminance of the light emitting layer 2 when the particle diameter of the spherical body 3 and the layer thickness of the light emitting layer 2 were variously changed. In addition, the mixing amount of the ink forming the light emitting layer 2 in Table 1 is set to a ratio of 0.5 for the high light emitting material and 0.3 for the glass beads as a spherical body with respect to 1 for the binder. The measurement conditions were as follows: each of the light-emitting layers was formed, and they were stored for 24 hours in a light-shielded state.
It excites by illuminating for 30 minutes at an illuminance of 00 lux, and then measures the afterglow luminance. In addition, as a comparative object of the light emitting layer not containing the spherical body 3, a general formula m (Sr ₁ -XEu _X ) which is excellent in persistence as a conventional light emitting material
O.nAl ₂ O ₃ .yB ₂ O ₃ [where 1 ≦ m ≦ 5,1
≤ n ≤ 8, 0.001 ≤ y ≤ 0.35], and the ratio of the conventional luminescent material is 0.7 with respect to 1 as the binder without mixing the spherical body 3 Table 2 shows the afterglow luminance when comparing the afterglow luminance under the same conditions between the light-emitting layer blended in (1) and the light-emitting layer blended with the above-described high light-emitting material at the same ratio.

[0067]

[Table 1]

[0068]

[Table 2]

As shown in Table 1, the luminous layer 2 in the present example has an afterglow luminance of about 1.2 times or more as compared with the luminous layer formed of the ink containing the high luminous material shown in Table 2. 1.3
It can be seen that light storage and light emission are performed efficiently. Regarding the particle size of the spherical body 3 to be blended, when blended at the same volume ratio, the larger the larger, the higher the afterglow luminance. Furthermore, when compared with the light emitting layer (100 μm) formed by the ink containing the conventional light emitting material shown in Table 2, Table 1
As shown in the figure, even if the light emitting layer 2 in this embodiment has a half layer thickness (50 μm), higher afterglow luminance can be obtained. Therefore, by using the ink in which the spherical body 3 is blended with the high luminous material, the luminance of the luminous layer 2 is increased, the thickness can be reduced to about half of the conventional one, and conventionally, it is formed by printing several times. Light emitting layer
It can be formed in one to two printings. Furthermore, since the excitation time until reaching a certain luminance is generally shorter as the afterglow luminance is higher, the one in which the spherical body 3 is mixed into the high light emitting material reaches the predetermined luminance faster than the conventional light emitting material. Thus, the excitation time can be shortened.

In this embodiment, transparent glass beads are used as the minute spherical bodies 3. However, there is no problem even if they are replaced with plastic beads, and a mixture of these is used. Is also possible. Further, the spherical body 3 does not need to have a perfect spherical shape, and it is possible to obtain an effect of increasing a light emitting area since the surface of the spherical body 3 has more irregularities if it has irregularities. However, in the case of a square body, the light emitting area becomes smaller than that of a spherical body, and when forming a light emitting layer by printing or the like, it is considered that a device required for printing may be damaged, which is not preferable. .

Further, the light emitting layer 2 in this embodiment is preferably formed by mixing a small amount of a curing agent into the ink before printing and then performing screen printing or the like. Further, it is effective to add a dispersing agent to disperse the high luminescent material and the spherical body 3 to be mixed in the ink well in the resin, or to add a surfactant or the like for preventing dripping of printing.

In the first embodiment, the ink forming the light emitting layer 2 is mixed with a high light emitting material. The afterglow luminance can be clearly improved as compared with the case using the light emitting material, and the same effect as in the above embodiment can be obtained.

FIG. 2 is a half sectional view showing a light emitting display panel according to a second embodiment of the present invention. Note that the same reference numerals are given to portions formed of the same operation and the same material as those in the first embodiment described above. The light emitting display panel in the present embodiment,
A reflective layer 4 is formed on the surface of a metal substrate 1 having a foot 1a, a light-emitting layer 2 containing the above-described high light-emitting material is formed on the surface of the reflective layer 4, and a time character is further formed on the surface. A light-transmitting substrate 5 made of a light-transmitting plastic or the like on which a light-transmitting material 6 or the like is formed is bonded via a light-transmitting adhesive layer 8. As described above, the light emitting display panel according to the present embodiment is configured such that the light emitting layer 2 is provided on the back surface side of the light transmitting substrate 5 so as to illuminate from the back side of the light transmitting substrate 5.

The light-emitting layer 2 in this embodiment is formed by printing with the same high light-emitting material as in the first embodiment described above and an ink in which a large number of spheres 3 are blended. With respect to the amounts of the body 3 and the binder, the same ones as in the first embodiment are used. The light-emitting layer 2 has a low brightness when the layer thickness is small, and increases in brightness as the thickness increases. Up to about 100 μm, the brightness increases proportionally. When the thickness exceeds 100 μm, the increase in brightness becomes dull and exceeds 150 μm. Then, the luminance hardly increases and becomes constant. For this reason, in this embodiment, the layer thickness of the light emitting layer 2 is set to 100 μm. However, as shown in Table 1 described above, about twice the luminance is obtained as compared with the conventional light emitting material having the same thickness. be able to.

On the other hand, in the present embodiment, the reflective layer 4 is formed by printing a white paint, but in addition, silver, aluminum powder or the like having a high reflectivity may be mixed with the paint for printing. Can also be formed. The reflection layer 4 can also be formed by forming a metal thin film on the surface of the substrate 1 by vapor deposition or attaching a metal foil. The reflection layer 4 formed in this manner is a light emitting layer 2
Works to effectively reflect the light radiated toward the surface to increase the luminance.

The light-transmitting substrate 5 in this embodiment is made of plastic or the like, but is not limited to this, and has a light-transmitting property such as glass, ceramic, or sapphire. Any material that can be molded may be used. Furthermore, this light-transmitting substrate 5
It is possible to use even a material which is decorated with coloring or the like to such an extent that light transmission is not hindered.

In the light-emitting display panel having the above-described structure, the high light-emitting material and the spherical body 3 can be formed similarly to the first embodiment.
The luminance can be increased by the light emitting layer 2 using, and the thickness of the light emitting layer 2 is reduced while maintaining sufficient luminance,
The number of printing steps can be reduced.

FIG. 3 is a sectional view showing a light emitting display panel according to a third embodiment of the present invention, FIG. 4 is an enlarged view of a main part thereof, and FIG. 5 is an enlarged plan view thereof. In the third embodiment, the same components and functions as those in the first and second embodiments are denoted by the same reference numerals. The light emitting display panel according to the present embodiment includes a metal substrate 1 having a foot 1a, a reflective layer 4 formed on the surface thereof, a diffusion layer 9 formed on the surface, and a light emitting layer 9 formed on the surface. And a light-transmitting substrate 5 having a time character 6 fixed on its surface and adhesively fixed on the light-emitting layer 2 via a transparent adhesive.

The diffusion layer 9 in this embodiment is formed by mixing and printing a microsphere 10 such as a transparent and glossy glass bead with a transparent acrylic resin paint. The microspheres 10 have a particle size of 2 to 30 μm so as to make the diffusion of light uniform and to prevent unevenness in luminance.
It is preferable to use those having a particle size in the range of m and a large number of particles having particle sizes different from each other. By providing the diffusion layer 9, the light emitted from the light emitting layer 2 to the back surface side is diffused by the minute spherical body 10, and together with the light reflected by the reflective layer 4, the light is emitted from the gaps between the dots of the light emitting layer 2, which will be described later. Irradiation in the direction increases the brightness. The structure of the diffusion layer 9 is not limited to the above structure, but may be formed by laying a large number of the microspheres 10 on the reflection layer 4 or may be formed on a thin transparent resin film. May be formed. In addition, the microspheres 10 are not limited to glass beads.
Any material may be used as long as it is a plastic ball, a silica ball, or any other member that irregularly reflects light.

On the other hand, the light emitting layer 2 in the present embodiment is different from that of FIG.
As shown in the figure, the dot is printed and formed on the surface of the diffusion layer 9. The planar shape of the dots of the light emitting layer 2 is a minute circle as shown in FIG. 5, and a large number of dots are arranged at regular intervals. The light emitting layer 2 thus formed in a dot shape has a convex curved surface with a raised surface due to the spherical body 3 contained therein and the surface tension of the ink. For this reason, the surface area is increased as compared with the flat surface, and the interval between the dots is made as small as possible, so that the light emitting area can be greatly increased as compared with the solid light emitting layer in each of the above-described embodiments. . Further, the shape of the dots of the light emitting layer 2 in the present embodiment is such that the planar shape is circular, but this is set to a rectangular shape as shown in FIG. Doing so has the same effect.

In the present embodiment, the light emitting layer 2 is formed of an aggregate of dots, and furthermore, the diffusion layer 9 and the reflection layer 4 are provided. The light emitted by the light emitting layer 2 in the direction of its back surface also diffuses
The microspheres 10 and the reflective layer 4 are used to irradiate the surface of the light emitting layer 2 from the gaps between the dots. Therefore, in the light emitting display panel having this structure, the luminance becomes about three times as long as that of the first and second embodiments in which the light emitting layer is formed by solid printing, and the afterglow time is extended. As a result, it is not necessary to form the light emitting layer thick to increase the luminance,
Sufficient light emission can be obtained with a thin light-emitting layer. Conventionally, two or three printings were required to form a thick light-emitting layer. Can be achieved.

As shown in FIGS. 7 and 8, the light emitting layer 2 in the first and second embodiments described above can also be formed in a dot shape, and like the third embodiment described above, The surface area of the dot-shaped light emitting layer 2 can be increased by swelling.

FIGS. 9 to 11 show fourth to sixth embodiments in which the light emitting display panel in the first to third embodiments is changed to a solar clock dial for use in a portable timepiece equipped with a solar cell powered by a solar cell. It is sectional drawing which shows an Example, FIG. 12: is sectional drawing which shows the structure of a portable timepiece with a solar cell. In the fourth to sixth embodiments, the first to third embodiments described above are also used.
The same reference numerals are given to the same components and operational parts as in the embodiment. As shown in FIG. 12, in a solar-equipped mobile watch, a movement 14
Are fixed via a middle frame 19, a solar cell 15 is fixed above the movement 14, and a solar dial 16 is further fixed on the middle frame 19 via a support frame 18. In this timepiece, external light is radiated to the solar cell 15 via a cover glass 17 on the front of the timepiece and a solar dial 16 below the solar clock, so that the solar dial 16 has translucency. It is necessary. For this reason, as shown in FIGS. 9 to 11, the light-emitting display panel substrate 1 in the above-described first to third embodiments is replaced with a light-transmitting sheet 1 made of a transparent film sheet.
1 and the reflective layer 4 in the second and third embodiments is removed so that external light emitted from the front side is transmitted toward the back side.

Even in the case of the fourth to sixth embodiments in which the light-emitting display panel is changed so as to transmit light, since the light-emitting layer 2 has a light yellow-green color which is the material color thereof, The solar dial used does not become colorless. However, even in this case, the light transmittance is 50% or more, and a sufficient transmittance for power generation of the solar cell 15 can be obtained.
In particular, when the diffusion layer 9 is provided, external light is diffused by the diffusion layer 9 and is radiated to the solar cell 15 as wide and uniform light, so that the power generation efficiency of the solar cell 15 is improved. be able to.

The solar dial is constructed so that it can be handled alone as a dial, but it can also be provided integrally on the surface of the solar cell 15. That is, the light emitting layer 2 is directly provided on the surface of the solar cell 15.
Alternatively, a light-transmitting substrate 5 or the like may be stacked.

The light transmitting sheet 11 is preferably formed of a sheet having excellent moisture resistance, heat resistance, etc., such as a polyester film.

The light emitting layer 2 in the above-mentioned solar dial can also be printed and formed in a dot shape or a grid shape.

FIGS. 13 to 15 are sectional views showing a seventh to ninth embodiments of a liquid crystal display panel using a backlight having the same basic structure as the light emitting display panels in the first to third embodiments. . In the seventh to ninth embodiments, the same components and functions as those in the first to third embodiments are denoted by the same reference numerals. First, the structure of the liquid crystal substrate 20 used in the liquid crystal display panel will be described. This liquid crystal substrate 20 is shown in FIGS.
As shown in FIG. 2, a transparent glass substrate 22 having an upper polarizing plate 21 formed on the front surface and a transparent glass substrate 24 having a lower polarizing plate 23 formed on the back surface are arranged opposite to each other.
A transparent segment electrode 25 and a common electrode 26 are formed on the inner surfaces facing each other, and transparent alignment films 27 and 28 for aligning liquid crystal molecules are formed thereon.
While maintaining a predetermined interval, the transparent glass substrate 2 is sealed with a sealing member 30 made of fiber glass or glass.
The liquid crystal 31 is sealed between 2 and 24. A backlight 32 illuminating the liquid crystal substrate 20 having the above configuration
Are disposed on the back side of the transparent glass substrate 24, that is, below in the figure.

The backlight 32 has the same basic structure as the light emitting display panel in the first to third embodiments described above, and includes the substrate 1, the clear layer 13, and the light-transmitting substrate in the first to third embodiments. 5 and FIGS. 13 to 1
5, the light emitting layer 2, or the light emitting layer 2 and the reflective layer 4,
Alternatively, the light-emitting layer 2, the reflection layer 4, and the diffusion layer 9 are directly
Are bonded to each other via a transparent adhesive.

The light emitting layer 2 of the backlight 32 can also be formed by printing in a dot or grid pattern.

FIGS. 16 to 18 are sectional views showing tenth to twelfth embodiments relating to a light emitting sheet having the same basic structure as the light emitting display panels in the first to third embodiments.
In the tenth to twelfth embodiments, the same reference numerals are given to the same components and parts having the same functions as those in the first to third embodiments. The light-emitting sheet shown in FIG. 16 includes a release paper 40 at the bottom in the figure, an adhesive layer 41 formed thereon by printing, and a first embodiment and the like formed by printing further thereon. The light-emitting layer 2 includes a light-emitting layer 2 having the same components as the light-emitting layer 2 and a light-transmitting overcoat layer 42 that covers the surface of the light-emitting layer 2. The overcoat layer 42 is formed on the surface of the light emitting layer 2 by printing a resin having a light transmitting property, and an acrylic resin, an epoxy resin, a urethane resin, or the like can be used. Moreover, the overcoat layer 4 is formed by printing such a resin.
Without forming 2, the light-transmitting sheet or film can be formed by adhering to the light-emitting layer 2 with a transparent adhesive. Further, the overcoat layer 42 may be a colored sheet having translucency.

[0092] The luminescent sheet is peeled off from the release paper 40,
It is used by attaching the adhesive layer 41 to an adherend.
At that time, if the adhesive layer 41 has translucency,
The light-emitting sheet irradiates light in any of the upper and lower directions in FIG.

The light emitting sheet shown in FIG.
In the light emitting sheet shown in FIG. 5, a reflective layer 4 similar to that in the second embodiment is provided between the adhesive layer 41 and the light emitting layer 2. The reflection layer 4 in the present embodiment is formed by printing a white paint, but may be a white sheet-like member. May be used as a paint.

Further, the light emitting sheet shown in FIG.
The reflective layer 4 is provided between the overcoat layer 42 and the light emitting layer 2 in the light emitting sheet shown in FIG. In the case of such a configuration, light emitted from the light emitting layer 2 emits light from the adhesive layer 41.
Therefore, the adhesive layer 41 needs to have a light-transmitting property.

As shown in FIGS. 19 and 20, the diffusion layer 9 in the third embodiment is provided between the light emitting layer 2 and the reflective layer 4 in the light emitting sheets shown in FIGS.
Light can be diffused to obtain uniform light emission.

The light emitting layer 2 in the tenth to twelfth embodiments shown in FIGS. 16 to 18 can also be printed and formed in a dot shape or a grid shape.

The light-emitting sheet has a transparent display panel,
For example, it can be used as nighttime display illumination by being attached to the front or back surface of a display panel for a vehicle, a display panel of an audio device, a dial for a clock, a display panel for displaying a location, or the like. In particular, since the light emitting layer 2 in which a spherical body is blended with a high light emitting material is used, the light emitting luminance is extremely high, and the light emitting sheet alone can be used as illumination in the dark or as a location confirmation display of an article. Yes, its use is wide.

[0098]

According to the present invention, a light emitting layer in which a spherical body is mixed with a light emitting material is provided on the front surface of a substrate or the back surface of a light transmitting substrate, so that light irradiation and light incidence can be performed efficiently. It can be excited in a short period of time, and it is possible to obtain higher luminous brightness than the conventional one by exposing it to external light for only a few minutes, and to drastically extend the afterglow time.

Further, since the light emitting layer is formed in a dot shape, the light emitting surface area of the light emitting layer can be greatly increased. Is applied to the surface direction from the gaps between the dots of the light emitting layer and the like, so that the luminance can be dramatically increased and the afterglow time can be significantly extended.

Furthermore, since the luminance can be greatly increased, sufficient brightness can be secured even if the thickness of the light emitting layer is reduced. Therefore, the number of times of printing required to perform the printing can be reduced, and the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a structure of a light emitting display panel according to a first embodiment of the present invention.

FIG. 2 is a half sectional view showing a light emitting display panel according to a second embodiment of the present invention.

FIG. 3 is a half sectional view showing a light emitting display panel according to a third embodiment of the present invention.

FIG. 4 is an enlarged view of a main part of the light emitting display panel shown in FIG.

FIG. 5 is an enlarged plan view of a main part of the light emitting display panel shown in FIG.

FIG. 6 is an enlarged plan view of a main part showing an example in which the shape of the dot shown in FIG. 5 is changed.

FIG. 7 is an enlarged sectional view of a main part when the light emitting display layer shown in FIG. 1 is formed in a dot shape.

8 is an enlarged sectional view of a main part when the light emitting display layer shown in FIG. 2 is formed in a dot shape.

FIG. 9 is a sectional view showing a fourth embodiment in which the light emitting display panel in the first embodiment is changed to a solar clock dial for a timepiece used in a solar-powered portable timepiece powered by a solar cell.

FIG. 10 is a sectional view showing a fifth embodiment in which the light emitting display plate in the second embodiment is changed to a solar clock dial for a timepiece used in a solar-equipped portable timepiece powered by a solar cell.

FIG. 11 is a cross-sectional view showing a sixth embodiment in which the light-emitting display panel in the third embodiment is changed to a solar clock dial for use in a portable timepiece equipped with a solar cell powered by a solar cell.

FIG. 12 is a sectional view showing the structure of a solar-equipped mobile watch.

FIG. 13 is a sectional view showing a seventh embodiment of a liquid crystal display panel using a backlight having the same basic structure as the light emitting display panel in the first embodiment.

FIG. 14 is a sectional view showing an eighth embodiment relating to a liquid crystal display panel using a backlight having the same basic structure as the light emitting display panel in the second embodiment.

FIG. 15 is a sectional view showing a ninth embodiment relating to a liquid crystal display panel using a backlight having the same basic configuration as the light emitting display panel in the third embodiment.

FIG. 16 is a sectional view showing a tenth embodiment relating to a light emitting sheet having the same basic configuration as the light emitting display panel in the first embodiment.

FIG. 17 is a cross-sectional view showing an eleventh embodiment of a light emitting sheet having the same basic configuration as the light emitting display panel in the second embodiment.

FIG. 18 is a sectional view showing a twelfth embodiment relating to a light emitting sheet having the same basic configuration as the light emitting display panel in the third embodiment.

19 is a cross-sectional view of a case where a diffusion layer is provided between a light emitting layer and a reflective layer in the light emitting sheet shown in FIG.

20 is a cross-sectional view when a diffusion layer is provided between a light emitting layer and a reflective layer in the light emitting sheet shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Substrate 2 Light emitting layer 3 Spherical body 4 Reflective layer 5 Translucent substrate 8 Adhesive layer 9 Diffusion layer 10 Microsphere 11 Translucent sheet 12 Case 14 Movement 15 Solar cell 16 Solar character plate 17 Cover glass 18 Support frame 19 Middle frame 20 Liquid crystal substrate 21 Upper polarizing plate 22 Transparent glass substrate 23 Lower polarizing plate 24 Transparent glass substrate 25 Segment electrode 26 Common electrode 27 Alignment film 28 Alignment film 29 Spacer 30 Sealing member 32 Backlight 40 Release paper 41 Adhesive layer 42 Overcoat layer

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[Procedure amendment]

[Submission date] September 22, 1998

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] FIG.

[Correction method] Change

[Correction contents]

FIG. 13

[Procedure amendment 2]

[Document name to be amended] Drawing

[Correction target item name] FIG.

[Correction method] Change

[Correction contents]

FIG. 14

[Procedure amendment 3]

[Document name to be amended] Drawing

[Correction target item name] FIG.

[Correction method] Change

[Correction contents]

FIG.

Claims (32)

[Claims] 1. A light-emitting display panel, wherein a light-emitting layer in which a transparent fine sphere is dispersedly mixed in a light-emitting material is formed on the entire surface or a part of the substrate. 2. A light-emitting layer in which a transparent fine sphere is dispersed and mixed in a light-emitting material is formed on the whole or a part of the back surface of a light-transmitting substrate, and a light-reflecting layer is provided. A light emitting display panel characterized by the above-mentioned. 3. The light emitting display panel according to claim 2, wherein a light diffusion layer is formed between said light emitting layer and said reflection layer. 4. The spherical body partially protrudes from a surface of a portion of the light-emitting layer containing a light-emitting material, and has a protrusion amount of 30.
The light emitting display panel according to claim 1, 2 or 3, wherein the thickness is not more than μm. 5. The light emitting display panel according to claim 1, wherein the spherical body is formed by randomly mixing a large number of particles having various particle diameters and dispersing them. 6. An ink in which the luminescent layer is blended in a volume ratio of 0.3 to 0.6 of the luminescent material and 0.2 to 0.5 of the spherical body per 1 binder. 2. The printing method according to claim 1, wherein
The light-emitting display panel according to 2, 3, 4, or 5. 7. The light-emitting layer according to claim 1, wherein the light-emitting layer is formed in a dot shape or a grid shape.
7. The light-emitting display panel according to 5 or 6. 8. The light-emitting material has a general formula (SrEu) Al ₂ O _4. [(SrEu) Onn (Al _1-ab B _b Q
_a ) ₂ O ₃ (OH)] [wherein Q is Bi, Ca, Mg, M
n is at least one selected from n, and a is 0.0
005 ≦ a ≦ 0.002, and b is 0.001 ≦ b
≦ 0.35, and n is 1 ≦ n ≦ 7], wherein the high-luminous material comprises a fired body. Light emitting display board. 9. The timepiece solar dial according to claim 1, wherein the substrate is formed of a light-transmitting substrate. 10. The timepiece solar dial according to claim 9, wherein a light diffusion layer is formed between the light emitting layer and the substrate. 11. The spherical body partially protrudes from a surface of a portion of the light-emitting layer containing a light-emitting material, and has a protrusion amount of 3
The timepiece solar dial according to claim 9 or 10, wherein the thickness is 0 µm or less. 12. The timepiece solar dial according to claim 9, 10 or 11, wherein the spheres are formed by randomly mixing and dispersing a large number of particles having various particle diameters. 13. The ink in which the luminescent layer is blended in a volume ratio of 0.3 to 0.6 of the luminescent material and 0.2 to 0.5 of the spherical body per 1 binder. 13. The timepiece solar dial according to claim 9, wherein the watch is formed by printing. 14. The light-emitting layer is formed in a dot shape or a grid shape.
Or a solar dial for a watch according to 13. 15. The light-emitting material has a general formula (SrEu) Al ₂ O _4. [(SrEu) Onn (Al _1-ab B _b Q
_a ) ₂ O ₃ (OH)] [wherein Q is Bi, Ca, Mg, M
n is at least one selected from n, and a is 0.0
005 ≦ a ≦ 0.002, and b is 0.001 ≦ b
≦ 0.35, and n is 1 ≦ n ≦ 7].
The solar dial for a watch according to 10, 11, 12, 13, or 14. 16. A first transparent glass substrate having an upper polarizing plate formed on a front surface thereof and a second transparent glass substrate having a lower polarizing plate formed on a back surface disposed opposite to each other. A segment electrode and a common electrode are formed on opposing inner surfaces of the glass substrate, and an alignment film for aligning liquid crystal molecules is formed on the segment electrode and the common electrode. A liquid crystal display panel comprising: a liquid crystal substrate in which liquid crystal is sealed between first and second transparent glass substrates; and a backlight comprising a light emitting layer in which a transparent fine spherical body is dispersed and mixed in a light emitting material. . 17. The liquid crystal display panel according to claim 16, wherein a reflection layer is provided on a back surface side of the light emitting layer. 18. The liquid crystal display panel according to claim 17, wherein a light diffusion layer is provided between the light emitting layer and the reflection layer. 19. The spherical body partially protrudes from the surface of the portion of the light-emitting layer containing the light-emitting material, and the amount of protrusion is 3
19. The liquid crystal display panel according to claim 16, 17 or 18, wherein the thickness is 0 μm or less. 20. The liquid crystal display panel according to claim 16, wherein a large number of particles having various particle diameters are randomly mixed and dispersed and compounded. 21. An ink in which the luminescent layer is mixed in a volume ratio of 0.3 to 0.6 of the luminescent material and 0.2 to 0.5 of the spherical body per 1 binder. 16, characterized in that it is formed by printing
The liquid crystal display panel according to 7, 18, 19 or 20. 22. The light-emitting layer according to claim 16, wherein the light-emitting layer is formed in a dot shape or a grid shape.
22. The liquid crystal display panel according to 9, 20, or 21. 23. The light-emitting material has a general formula (SrEu) Al ₂ O _4. [(SrEu) On.n (Al ₁ -abB _b Q
_a ) ₂ O ₃ (OH)] [wherein Q is Bi, Ca, Mg, M
n is at least one selected from n, and a is 0.0
005 ≦ a ≦ 0.002, and b is 0.001 ≦ b
≦ 0.35, and n is 1 ≦ n ≦ 7], wherein the fired body is made of a highly luminescent material. LCD panel. 24. A light-emitting sheet, wherein a light-emitting layer in which a transparent fine spherical body is dispersed and mixed in a light-emitting material is provided between an overcoat layer and an adhesive layer. 25. A light-emitting layer in which a transparent fine sphere is dispersed and mixed in a light-emitting material is provided on the entire surface or a part of a reflection layer provided between a translucent overcoat layer and an adhesive layer. A light-emitting sheet, characterized in that: 26. A light-emitting layer in which a transparent fine spherical body is dispersed and mixed in a light-emitting material is provided on the entire back surface or a part of a reflection layer provided between an overcoat layer and a light-transmitting adhesive layer. A light-emitting sheet, characterized in that: 27. A light diffusion layer is formed between the light emitting layer and the reflection layer.
The luminescent sheet according to the above. 28. The spherical body partially protrudes from the surface of a portion of the light emitting layer containing a light emitting material, and the amount of protrusion is 3
26, wherein it is 0 μm or less.
28. The light emitting sheet according to 26 or 27. 29. The light emitting sheet according to claim 24, wherein the spherical body is formed by randomly mixing and dispersing a large number of particles having various particle diameters. 30. An ink in which the luminescent layer is mixed in a volume ratio of 0.3 to 0.6 of the luminescent material and 0.2 to 0.5 of the spherical body per 1 binder. 3. The printing head according to claim 2, wherein the printing head is formed by printing.
The luminescent sheet according to 4, 25, 26, 27, 28 or 29. 31. The light emitting layer according to claim 24, wherein the light emitting layer is formed in a dot shape or a grid shape.
The luminescent sheet according to 6, 27, 28, 29 or 30. 32. The light-emitting material has a general formula (SrEu) Al ₂ O _4. [(SrEu) Onn (Al ₁ -abB _b Q
_a ) ₂ O ₃ (OH)] [wherein Q is Bi, Ca, Mg, M
n is at least one selected from n, and a is 0.0
005 ≦ a ≦ 0.002, and b is 0.001 ≦ b
≦ 0.35, and n is 1 ≦ n ≦ 7], wherein the material is a highly luminescent material formed of a fired body that satisfies the following conditions: 24, 25, 26, 27, 28, 29, 30 or 31
The luminescent sheet according to the above.