JP2013200393A - Luminous member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a luminous member which has a simple structure and high afterglow brightness and has a large total amount of light as the whole and emits light for a long period of time with such brightness that it is visible.SOLUTION: The luminous member includes: a plurality of luminous body parts which involve luminous bodies including luminous body particles and are regularly juxtaposed at intervals in a direction substantially orthogonal to one irradiation direction of incident light and are arranged like a layer substantially as the whole; and light-transmissive light distributing/collecting parts which are disposed between adjacent luminous bodies and distribute the radiated incident light to guide it to the luminous body parts and collect emission light emitted from the luminous bodies to emit it to the outside.

Description

  The present invention relates to a phosphorescent member having a phosphorescent material that self-emits by accumulating energy upon incidence of light.

  Practical use of a phosphorescent material that emits light for a certain period of time and self-emits even after the irradiation is stopped. Since such a phosphor can self-emit by the energy accumulated by sunlight or lamp irradiation after sunset or after extinguishing, it can be used for night signs and light decorations. In addition, it can be used in fields such as guidance signs and auxiliary lighting that function in the event of a power failure, and demand is increasing in various fields.

In the phosphorescent body, the higher the afterglow luminance, the better the visibility. Therefore, improvement of the afterglow luminance is an issue, and various proposals have been made regarding the phosphorescent member having the phosphorescent body.
For example, a method has been proposed in which the lowermost surface is used as a reflective layer, and a method of laminating phosphorescent particles one by one on the reflective layer using a transparent adhesive, enlarging the phosphorescent particles to be used, and the phosphorescent material in one layer The afterglow brightness is improved by increasing the density of the particles and by multilayering the layers of the phosphor particles (see Patent Document 1).
However, if the phosphor particles are arranged closely, there is a problem in that the light transmittance between the layers decreases, and sufficient light does not reach the phosphor particles on the lower layer side, so that the effect of multilayering is lost.
This will be described with reference to FIG. FIG. 1 is an explanatory view showing a model in which layers in which phosphor particles are arranged closely are multilayered.
In this model, four layers of phosphor particles 201 are stacked on a substrate 200. Incident light attenuates as it proceeds from the first particle layer 202 on the light incident side to the second particle layer 203 and the third particle layer 204 arranged at deeper positions. Incident light does not reach the particle layer 205. Accordingly, in this model, the afterglow luminance values obtained from the first particle layer 202 to the third particle layer 204 are saturated, and the afterglow luminance cannot be improved even if the number of layers is increased. There's a problem. Note that reference numeral 206 in FIG. 1 indicates a protective layer of the phosphor particles 201.

In addition, by dispersing the phosphor particles in a medium such as a glass material or silica gel material, light is incident on the phosphor particles at a deep position through the medium and emitted from the phosphor particles at a deep position. There has been proposed a method of emitting the emitted light to the outside (see, for example, Patent Documents 2 and 3).
For example, Patent Literature 2 proposes a phosphorescent member in which a phosphorescent pigment and a solid spacer having translucency are dispersed in a translucent binder serving as a support base material. According to this proposal, through the translucent spacer and binder, the light is guided directly to the phosphorescent pigment at a deep position not exposed to the outside, and the light emitted by the phosphorescent pigment is guided to the outside. A high afterglow brightness is to be obtained.
Further, with this phosphorescent member, it is said that a relatively long luminous property can be obtained. If light can be emitted for a long time, for example, after sunset, the light can be emitted until the next morning, and a phosphorescent member excellent in convenience can be provided.
However, since these phosphorescent members decrease the afterglow luminance with the lapse of time after light irradiation is stopped, the phosphorescent members that still emit light for a long time with higher afterglow luminance in fields where sufficient visibility is required. It is the present situation that development of is required.

Further, as a phosphorescent member capable of light emission for a long time, even if the afterglow luminance obtained from the molded article is reduced by arranging a condenser lens on the molded article containing the phosphor particles, the light is A method of condensing light on a condensing lens to emit light with high brightness has been proposed (see, for example, Patent Document 4).
However, the configuration using the condenser lens has a problem that the structure becomes complicated and the manufacturing cost increases. Also, even if this method is used, the total light amount of the entire member does not increase. Considering the dimming of the non-condensing part, the afterglow luminance is substantially improved and the light emission time is long for each member. There is a problem that it cannot be expected.

JP 2003-255869 A JP-A-8-259933 JP 2009-235135 A JP 2011-73360 A

  An object of the present invention is to solve the above-described problems and achieve the following objects. That is, an object of the present invention is to provide a phosphorescent member that has a simple structure, has a high afterglow luminance and a total light amount of the entire member, and emits light for a long time with a visible luminance.

In order to solve the above-mentioned problems, the following findings were obtained as a result of intensive studies.
That is, rather than the conventional configuration in which the phosphor particles are dispersed in the binder in consideration of the light transmittance of the phosphor particles, the phosphor particles are not considered in light transmittance. It is possible to form the configured phosphors so that their luminance is close to saturation, and by arranging a plurality of phosphors in the member, excellent afterglow characteristics are obtained, while these phosphors are regularly arranged. As a result, it is possible to distribute incident light between these phosphors and to provide an optical path for concentrating emitted light emitted from the phosphors and emitting them to the outside. It has been found that the average value of the light emission becomes high and long-time emission characteristics can be obtained. Further, it has been found that a longer light emission characteristic can be obtained with higher afterglow luminance on the optical path of the emitted light.

With regard to the above knowledge, in the prior art, the particle density is increased to a certain level or more from the necessity of ensuring a certain level of translucency as a whole member by allowing the translucent base material to exist between the phosphor particles. Difficult to do. Therefore, on the extension line of such prior art, when further study of improvement in luminance, light quantity, and afterglow time is carried out, high density filling of the phosphor particles and the phosphor You will face a trade-off with the low density dispersibility of the particles.
Therefore, in the above knowledge, a portion of the phosphorescent body formed by arranging a plurality of the phosphorescent bodies is regularly arranged with a predetermined interval, and thus the portion that does not contribute to the improvement of the afterglow luminance, that is, The incident light (excitation light) does not reach and the incident light is distributed to the portion of the phosphor that does not contribute to the improvement of the afterglow luminance of the phosphorescent member, and the afterglow from the phosphor And the presence of the phosphor, which is newly effective by the mechanism, is arranged to be larger than the site of existence of the phosphor, which was originally effective due to the existence of the mechanism. As a result, the light amount, luminance, and afterglow time of the entire member are improved.
That is, if the phosphor layer is three-dimensionally configured so that the area of the phosphor layer is substantially larger than the case where the phosphor layer is densely spread on the incident light irradiation surface and formed as a single layer, the same layer is formed. It is certain that the luminance (light quantity) is higher than that of the single layer.
Rather than simply kneading the phosphor particles in the base material and irregularly arranging the phosphor particles, the phosphors containing the phosphor particles are regularly arranged, thereby ensuring the optical path of the incident light. Thus, it is possible to reliably adjust the distance between the phosphors for optimizing the characteristics.

The present invention is based on the above knowledge, and means for solving the above problems are as follows. That is,
<1> A plurality of phosphors that contain phosphor particles and that are regularly arranged in parallel at intervals in a direction substantially orthogonal to one irradiation direction of incident light, and are arranged in a substantially layer shape as a whole. Phosphorescent body part of
Translucent light that is arranged between adjacent phosphorescent body parts, distributes the incident light to be irradiated, guides it to the phosphorescent body part, collects the emitted light emitted from the phosphorescent body part, and emits it to the outside And a light distribution condensing part.
<2> A plurality of layers formed of phosphorescent body portions are stacked, and at least a part of each phosphorescent body portion in one layer is in a stacking direction with at least a part of each phosphorescent body portion in another layer. The phosphorescent member according to <1>, wherein the phosphorescent members are regularly arranged opposite to each other with an interval.
<3> The phosphorescent member according to <2>, wherein the light distribution condensing unit is disposed between layers formed by the laminated phosphor storage units.
<4> The phosphorescent member according to any one of <1> to <3>, wherein the light distribution condensing part includes a light scatterer.
<5> The phosphorescent member according to any one of <1> to <4>, further including a reflective layer that reflects incident light, wherein the phosphorescent body portion and the light distribution condensing portion are disposed on the reflective layer. .
<6> Any one of <1> to <5>, wherein an interval between adjacent phosphorescent body portions in the layer is 0.05 to 10 times the maximum width in the juxtaposed direction of the phosphorescent body portions. The phosphorescent member of crab.
<7> The phosphorescent member according to any one of <1> to <6>, wherein an interval between adjacent phosphorescent body portions in the layer is 0.05 μm to 100 mm.
<8> Any one of <2> to <7>, wherein an interval between the opposed phosphor storage parts is 0.05 to 10 times the maximum width in the juxtaposed direction of the phosphor storage parts. The phosphorescent member according to 1.
<9> The phosphorescent member according to any one of <2> to <8>, wherein an interval between the phosphorescent body portions arranged to face each other is 0.05 μm to 100 mm.
<10> The phosphorescent member according to any one of <1> to <9>, wherein the maximum width in the juxtaposed direction in the phosphorescent body portion is 0.5 μm to 100 mm.
<11> The phosphorescent member according to any one of <1> to <10>, wherein the maximum height in the one irradiation direction of incident light in the phosphorescent body portion is 0.5 μm to 500 mm.
<12> The light storage unit according to any one of <1> to <11>, wherein the light distribution condensing unit has a structure in which at least a space between adjacent phosphor storage units in the layer is filled with a translucent member. Element.
<13> The light distribution / condensing unit according to any one of <1> to <11>, wherein the light distribution condensing unit is capable of including the phosphorescent body unit, has translucency, and is formed of a member having a curved surface at least in part. Phosphorescent member.
<14> The light storage according to any one of <1> to <13>, wherein the light distribution condensing part is formed of a tubular member having translucency and capable of inserting the light storage part in the axial direction. Element.
<15> The phosphorescent member according to any one of <1> to <14>, wherein phosphorescent bodies having different emission colors or emission intensities between at least two phosphorescent body portions are used.

  According to the present invention, there is provided a phosphorescent member that can solve the above-mentioned problems in the prior art, has a simple structure, has high afterglow luminance and the total light amount of the entire member, and emits light with visible luminance for a long time. be able to.

FIG. 1 is an explanatory view showing a model in which layers in which phosphor particles are arranged closely are multilayered. FIG. 2 is a cross-sectional view showing an outline of the phosphorescent member 1 according to the first embodiment of the present invention. FIG. 3 is a cross-sectional view showing an outline of the phosphorescent member 51 according to the second embodiment of the present invention. Fig.4 (a) is explanatory drawing (1) which shows an example of the manufacturing process of a luminous member. FIG.4 (b) is explanatory drawing (2) which shows an example of the manufacturing process of a phosphorescent member. FIG.4 (c) is explanatory drawing (3) which shows an example of the manufacturing process of a phosphorescent member. FIG.4 (d) is explanatory drawing (4) which shows an example of the manufacturing process of a phosphorescent member. FIG.4 (e) is explanatory drawing (5) which shows an example of the manufacturing process of a phosphorescent member. FIG. 5 is a cross-sectional view showing an outline of a phosphorescent member 100 according to the third embodiment of the present invention.

(Luminescent material)
The phosphorescent member of the present invention has a phosphorescent body part and a light distribution / condensing part, and has other members such as a reflective layer and a storage container as necessary.

<Phosphorescent part>
The phosphorescent body portion includes a phosphorescent body containing phosphor particles, and is regularly arranged in parallel with an interval in a direction substantially orthogonal to one irradiation direction of incident light. Is done.
When the phosphorescent body portion is regularly arranged in this manner, the incident light (excitation light) irradiated to the phosphorescent member is introduced into a portion other than the surface on the incident light side of the phosphorescent body portion through the interval. Thus, it is possible to introduce a larger amount of the incident light into the phosphorescent body portion and to emit more emitted light emitted from the phosphorescent body portion to the outside.

The layer formed by the phosphorescent body portion is not particularly limited, but a plurality of layers are preferably stacked. In this case, at least a part of each phosphorescent body portion in one layer is in another layer. It is preferable that the phosphor layers are regularly opposed to at least a part of each phosphorescent body portion with an interval in the stacking direction.
As described above, since the phosphorescent part is disposed with a gap between the phosphorescent parts adjacent to each other in the layer, through the gap, the surface side irradiated with the incident light is more than the bottom side. The incident light (excitation light) can be introduced into a layer formed by the phosphorescent body portion arranged at a deep position, and emitted light emitted from the phosphorescent body portion in the layer is emitted to the outside. It is possible to make it. In addition, by providing an interval between the phosphorescent body portions arranged to face each other, a large surface area can be obtained for receiving the incident light of the phosphorescent body portion and emitting the emitted light.
As a result, it is possible to stack the layers formed by the phosphorescent body portion in multiple stages without losing the effect of multilayering, and the emitted light of the phosphorescent body portion can be emitted to the light distribution condensing portion. By condensing more light, it is possible to obtain longer light emission characteristics with higher afterglow luminance.

There is no particular limitation on the interval between the phosphor storage parts adjacent in the layer, but it is preferably 0.05 to 10 times the maximum width in the juxtaposition direction of the phosphor storage parts, 0.1 Double to 5 times is more preferable, and 0.1 to 2 times is particularly preferable.
When the distance is such a size, the phosphorescent body portion can be densely integrated (filled) in the phosphorescent member while securing the optical path in the phosphorescent member, and the afterglow luminance is improved. As a result, it is possible to increase the total amount of light of the entire phosphorescent member and to obtain longer light emission characteristics.
In addition, when the interval is less than 0.05 times, the arrangement density of the phosphor storage portions becomes unnecessarily dense, and the optical path of the incident light introduced into the light distribution condensing unit through the interval is more than necessary. If the interval exceeds 10 times, the arrangement density of the phosphorescent body portions becomes sparse, and an improvement in the total light quantity of the entire phosphorescent member may not be expected.

As a specific interval between the phosphorescent body portions adjacent in the layer, the above-mentioned afterglow luminance is improved, the total light amount of the entire phosphorescent member is increased, and a longer-time emission characteristic is obtained and 0.05 μm to 100 mm is preferable, 0.1 μm to 50 mm is more preferable, and 0.1 μm to 20 mm is particularly preferable from the relationship with the phosphorescent body portion formed with a size suitable for practical use.
In addition, the said space | interval shows the shortest distance between the said luminous body parts adjacent in the said layer.

Although there is no restriction | limiting in particular as the space | interval between the said luminous body parts arrange | positioned facing, 0.05 times-10 times are preferable with respect to the maximum width of the parallel arrangement direction in the said luminous body part, 0.1 time -5 times is more preferable, and 0.1 times to 2 times is particularly preferable.
When the distance is such a size, the phosphorescent body portion can be densely integrated (filled) in the phosphorescent member while securing the optical path in the phosphorescent member, and the afterglow luminance is improved. As a result, it is possible to increase the total amount of light of the entire phosphorescent member and to obtain longer light emission characteristics.
In addition, when the interval is less than 0.05 times, the arrangement density of the phosphorescent body portions becomes unnecessarily dense, and the optical path of the incident light introduced into the phosphorescent body portions through the interval is more than necessary. When the interval exceeds 10 times, the arrangement density of the phosphorescent body portions becomes sparse, and it may not be expected to improve the total light quantity of the entire phosphorescent member.

As a specific interval between the phosphorescent body portions arranged opposite to each other, the above-described afterglow luminance is improved, the total light quantity of the entire phosphorescent member is increased, and a long-term light emission characteristic is obtained and practically used. 0.05 μm to 100 mm is preferable, 0.1 μm to 50 mm is more preferable, and 0.1 μm to 20 mm is particularly preferable.
In addition, the said space | interval shows the shortest distance between the said luminous body parts arrange | positioned facing.

The maximum width of the phosphor portions in the juxtaposed direction is not particularly limited and may be any size as long as the phosphor particles can be contained, but is preferably 0.5 μm to 100 mm, and preferably 5 μm to 50 mm. More preferably, 50 μm to 50 mm is even more preferable, and 500 μm to 20 mm is particularly preferable.
When the maximum width is less than 0.5 μm, the selection of the particle diameter of the phosphorescent material is restricted, and when the maximum width exceeds 100 mm, the phosphorescent member becomes larger than necessary.

The maximum height in the one irradiation direction of the incident light in the phosphor portion is not particularly limited as long as it is small enough to contain the phosphor particles, but 0.5 μm to 500 mm. Preferably, 5 μm to 500 mm is more preferable, 50 μm to 500 mm is even more preferable, and 500 μm to 100 mm is particularly preferable.
When the maximum height is less than 0.5 μm, the selection of the particle diameter of the phosphor is restricted, and when the maximum height exceeds 500 mm, the incident light contained in the phosphor portion is the In some cases, the phosphor particles do not reach the phosphor particles located at a deep position from the surface side of the phosphor member in the phosphor part, and the brightness is saturated, which may not contribute to the improvement of afterglow luminance.

  Although there is no restriction | limiting in particular as a formation method of the said luminous body part, The method of making this space into the said luminous body part is mentioned by giving a space in the said light distribution condensing part.

As the phosphorescent particles constituting the phosphorescent article is not particularly _{limited, SrAl 2 O 4: Eu,} Dy, Sr 4 Al 14 0 25: Eu, aluminates such as _Dy, Sr ₂ MgSi 2 O _7: Select appropriately from known phosphor particles such as silicates such as Eu and Dy, sulfides such as ZnS: Cu, and commercial products thereof, and adjust emission characteristics such as emission color by mixing single or multiple types. Can be used. If a plurality of types having different excitation wavelength characteristics are selected, it becomes possible to deal with excitation light in a wider wavelength band.
The average particle diameter of the phosphor particles is not particularly limited, but the phosphor particles having a large average particle diameter are more likely to have a high afterglow luminance, and are preferably at least 0.1 μm. More preferably, it is at least 1 μm.

  The phosphor is not particularly limited as long as it contains the phosphor particles, and may include one phosphor particle or a plurality of phosphor particles. Further, the phosphor particles may be dispersed in a binder.

There is no restriction | limiting in particular as a structure of each said luminous body part, You may use the said luminous body of the same luminescent color or luminescence intensity, However, The said luminous substance from which luminescent color or luminescence intensity differs between at least two said luminous body parts The body can also be used.
In the latter case, it is possible to display a pattern or a character by using the light emission characteristic difference as a design element at the time of afterglow emission.

<Light distribution condensing part>
The light distribution condensing unit is disposed at least between the adjacent phosphor storage units in the layer, distributes the incident light to be irradiated, guides the incident light to the phosphor storage unit, and is emitted from the phosphor storage unit It is a part that collects the emitted light and emits it to the outside, and has translucency.
In this specification, the light distribution means that the light path is changed by refracting or reflecting the light, and the light collecting is on the outermost surface from which the emitted light of the phosphorescent member is emitted, It shows that the afterglow brightness is higher on the interval between the phosphor storage parts adjacent in the layer than on the phosphor storage part.

Although there is no restriction | limiting in particular as said light distribution condensing part, When multiple layers formed in the said light storage part are laminated | stacked, it is preferable to distribute also to this interlayer.
With such a configuration, the incident light can be easily guided between the layers, and the emitted light emitted from the phosphorescent body can be easily condensed. At the same time, the phosphorescent body portion can be supported without using a special support member.

There is no restriction | limiting in particular as long as it has translucency as a forming material of the said light distribution condensing part, For example, well-known translucent members, such as glass, a transparent resin material, and a light guide material (light guide plate), are mentioned. . In addition, these may be used individually by 1 type and may use the 2 or more types together, and may form the said light distribution condensing part.
Note that the light-transmitting property depends on the wavelength of the excitation light to be used, but in this specification, at least a layer having a thickness of 1 mm with respect to light having a specific wavelength included in the visible light region. It indicates that the light transmittance of the layer is 40% or more.

The refractive index of light included in the material for forming the light distribution condensing part is not particularly limited, but the incident light is refracted and the incident light is distributed and introduced into the light accumulator part. From the viewpoint of collecting the emitted light emitted from the body part, it is preferably 1.2 to 2.5.
However, when the light scatterer described below is included, the forming material is not necessarily limited to a material having such a refractive index.

There is no restriction | limiting in particular as a structure of the said light distribution condensing part, For example, what has the structure by which the said translucent member was filled into the whole space of the said luminous body part adjacent at least in the said layer is mentioned.
With regard to this filling structure, when a plurality of layers formed of the phosphorescent body portions are stacked, the entire space between the phosphorescent body portions facing each other is filled with the translucent member. You can also
Moreover, what has the structure which can enclose the said luminous body part, has translucency, and is formed with the member which has a curved surface at least in part is mentioned. The curved surface is not particularly limited, but preferably has a radius of curvature larger than the radius of the phosphor particles. With such a radius of curvature, the phosphor particles can be efficiently contained in the encapsulated phosphor portion without giving a useless space.
Moreover, what has translucency and has the structure formed with the tubular member which can insert the said luminous body part in an axial center direction is mentioned. As the tubular member, a prismatic one may be selected to form the filling structure, or a cylindrical member may be selected as the tubular member to form a member having the curved surface. Good.

Although there is no restriction | limiting in particular as said light distribution condensing part, It is preferable that the light-scattering body contains.
With such a configuration, the incident light can be reflected and refracted by the light scatterer to be distributed even in a portion where the incident light is not distributed to the phosphor storage part, and at the same time, the phosphor storage part It becomes easy to condense the emitted light emitted from.
Further, when a plurality of layers formed by the phosphorescent body portion are stacked, the light scattering body reflects and refracts the incident light, and is formed by the phosphorescent body portion existing at a deep position from the surface side of the phosphorescent member. The incident light can be easily introduced into the layer, and at the same time, the emitted light emitted from the phosphorescent body can be easily collected.
The light scatterer is not particularly limited as long as it reflects and refracts and scatters light, and examples thereof include metal powder such as silver and porous glass beads.

<Other members>
There is no restriction | limiting in particular as said other member, According to the objective, it can select suitably, For example, the said reflection layer, the said storage container, an electrical illumination part, etc. are mentioned.

The reflective layer has a role of reflecting the incident light.
When the reflective layer is provided, the light storage member is configured by arranging the light storage unit and the light distribution condensing unit on the reflection layer.
According to such a configuration, the incident light incident from the surface side of the phosphorescent member and the emitted light emitted from the phosphorescent body portion are reflected by the reflective layer located at the deepest portion of the phosphorescent member. Thus, the reflected light can be introduced into the phosphor storage part by the light distribution condensing part and the emitted light emitted from the phosphor storage part can be condensed for a long time with higher afterglow luminance. Can be emitted.
Further, from this point of view, the phosphorescent body portion is made to have the incident light reach the reflective layer located at the deepest part, and the residual light is reflected by the light emitted from the phosphorescent body portion based on the reflected light and the reflected light of the emitted light. It is preferable to arrange them regularly with a predetermined interval so that light can be obtained.

The storage container has a role of storing the phosphorescent member.
As the storage container, for example, a box-shaped body having a concave cross section can be used, and the phosphorescent member is stored inside.

The electrical illumination unit has a role of irradiating light to the phosphorescent member.
Although the afterglow light emission based on sunlight is also possible as said luminous member, the afterglow light emission based on the light irradiated from electric illumination parts, such as LED, is also possible.
For example, the electrical illuminating unit is disposed outside the phosphorescent member having the above-described configuration with respect to the configuration of the phosphorescent member.
Moreover, it is good also as arrange | positioning inside the said luminous member and supplying light supplementarily with respect to the said sunlight and the said electrical illumination part as an external light source. For example, the electrical illumination unit may be disposed in the light distribution / condensing unit.
Moreover, as the said electrical illumination part, the light emission color of the said light storage member may be adjustable by arranging the light emitting element (for example, LED) of a different light emission color, and each said light storage in the said light storage member The excitation light corresponding to the excitation wavelength of the body may be supplied.

(First embodiment)
Embodiments of the phosphorescent member according to the present invention will be described in more detail with reference to the drawings.
FIG. 2 is a cross-sectional view showing an outline of the phosphorescent member 1 according to the first embodiment of the present invention.
The phosphorescent member 1 has a structure in which a first layer 4 formed by juxtaposing phosphorescent body portions 3 and a second layer 5 are laminated on the reflective layer 2 in this order. It has the light distribution condensing part 6 which has the structure which filled the translucent member in the whole space between the luminous body parts 3. FIG.
Here, each luminous body part 3 is arranged with the following regularity.
In other words, the respective phosphorescent body portions 3 in the first layer 4 and the second layer 5 are arranged with an interval A in the juxtaposed direction (layer direction). In addition, each phosphor storage unit 3 in the first layer 4 is disposed opposite to each phosphor storage unit 3 in the second layer 5. The phosphor portions 3 arranged opposite to each other between the first layer 4 and the second layer 5 are arranged with an interval B therebetween.
Each phosphorescent article unit 3, the maximum width of the arrangement direction is C, the maximum height of the irradiation direction of the incident light L ₁ is a D.
Further, Haihikarishu light unit 6, in addition to the arrangement described above, the incident light L ₁ is the are of the accumulating member first side surface to the outermost surface layer to become the second to protect the second layer 5 irradiated It is formed so as to cover the surface side of the layer 5.

Incident light L ₁ incident on the light storage member 1 is refracted by the light distribution condensing unit 6 and is introduced into each light storage unit 3 in the first layer 4 in addition to the second layer 5. Further, the incident light L ₁ that has reached the deepest reflection layer 2 is reflected by the reflection layer 2 and introduced into each phosphor storage unit 3. Each phosphor storage unit 3 is excited by the introduced incident light L ₁ and emits light for a certain period of time. Its emitted light is emitted through the Haihikarishu light section 6 to the outside of the accumulating member 1 can be taken out from the accumulating member 1 as the outgoing light L _2.
At this time, out of the emitted light emitted from the phosphorescent body portion 3 in the first layer 4, a part of the emitted light directed to the phosphorescent body portion 3 disposed to face the second layer 5 is the phosphorescent body portion. 3, which cannot be taken out to the outside, but is partly emitted from the other phosphorescent body portion 3 in the second layer 5 adjacent to the phosphorescent body portion 3, due to the phosphorescent body portion 3 The emitted light that is directed to the outside without being subjected to absorption and reflection is emitted to the outside via the light distribution condensing unit 6 disposed between the adjacent phosphor storage units 3 in the first layer 4.
At this time, by adjusting the distances A and B between the respective phosphorescent body portions 3 and the width C and the height D in the phosphorescent body portion 3 and arranging the respective phosphorescent body portions 3 regularly, While securing the optical path, the phosphorescent body portion 3 can be accumulated (filled) in the phosphorescent member 1 at a high density, the afterglow luminance is improved, the total light quantity of the entire phosphorescent member is increased, and a longer time is required. It becomes possible to obtain the light emission characteristics.
Moreover, in the position on the light distribution condensing part 6 between each phosphorescent body part 3, light emission is enabled by the afterglow brightness higher than the position on the luminous substance part 3 in the 1st layer 4, As a result, Light emission with an afterglow luminance that can be visually recognized can be maintained for a long time.
Moreover, in the phosphorescent member 1, it is not necessary to arrange condensing members, such as a condensing lens, separately from the light distribution condensing part, and it can be set as a simple structure.

(Second Embodiment)
Then, the luminous member which concerns on the 2nd Embodiment of this invention is demonstrated using FIG. FIG. 3 is a cross-sectional view showing an outline of the phosphorescent member 51 according to the second embodiment of the present invention.
The phosphorescent member 51 has a structure in which a first layer 54 formed by juxtaposing a phosphorescent body portion 53 and a second layer 55 are laminated in this order on the reflective layer 52. It has the light distribution condensing part 56 which has the structure which filled the translucent member in the whole space between the luminous body parts 53. FIG.
The arrangement of the light storage unit 53, the light distribution condensing unit 56, and the reflection layer 52 is the same as that of the light storage member 1 in the first embodiment, and the light distribution unit 56 contains the light scatterer 57. Is different.

In this phosphorescent member 51, more incident light L ₁ can be introduced into the phosphor storage portion 53 by reflecting and refracting incident incident light L ₁ in many directions by the light scatterer 57. Miscellaneous reflecting emission light emitted from the phosphorescent article 53, by refraction, the more the emitted light can be taken out of the accumulating member 51 (see outgoing light L ₂ in FIG. 3).

Here, like the phosphorescent member 1 according to the first embodiment and the phosphorescent member 51 according to the second embodiment, the light distribution condensing unit fills the entire space between the phosphorescent member portions with the translucent member. A method for manufacturing the phosphorescent member having the structure described above will be described.
4 (a) to 4 (e) are explanatory views showing a manufacturing process of the phosphorescent member.

First, after coating a light-transmitting material such as glass or transparent resin on the reflective layer 71, a convex portion is formed by using a mold or a masking technique, and a layered light distribution condensing portion 72 and a convex shape are formed. A light distribution condensing part 73 is formed (see FIG. 4A).
Next, using the powder nozzle 75 or the like, the phosphorescent body 74 is introduced into each region partitioned by the convex light distribution and condensing unit 73 (see FIG. 4B).
Next, after coating the light transmissive material again, a convex part is formed using a mold or a masking technique, and a layered light distribution condensing part 76 and a convex light distribution condensing part 77 are formed. (See FIG. 4C).
Next, using the powder nozzle 75 or the like, the phosphorescent body 78 is introduced into each region partitioned by the convex light distribution condensing unit 77 (see FIG. 4D).
Finally, the light transmissive material is applied again to form a layered light distribution condensing part 79, and the region where the phosphorescent body 78 is introduced is sealed (see FIG. 4E).
As described above, it is possible to manufacture the phosphorescent member 80 having a structure in which the light distribution condensing part is filled with the translucent member in the entire space between the phosphorescent body parts.

(Third embodiment)
Then, the luminous member which concerns on the 2nd Embodiment of this invention is demonstrated using FIG. FIG. 5 is a cross-sectional view showing an outline of a phosphorescent member 100 according to the third embodiment of the present invention.
The phosphorescent member 100 includes a box-shaped body 103 and a cylindrical tubular member 102 which is accommodated in the box-shaped body 103 and has translucency, and the phosphorescent body 101 is inserted in the axial direction. A first layer 105 provided, a second layer 106 provided with a tubular member 102 provided on the first layer 105, and a third layer 107 provided on the second layer 106. And have.
The tubular members 102 in the first layer 105 to the third layer 107 are positioned with regularity so as to face each other in the stacking direction.
Further, the inner wall surface of the box-shaped body 103 is covered with a reflective layer 104.

The phosphorescent member 100 having such a configuration can cause the tubular member 102 to function as the light distribution condensing unit, as in the phosphorescent member 1 according to the first embodiment. At the position P1 located immediately above the portion arranged in the interval between the phosphorescent bodies 101, it is possible to emit light with a higher afterglow luminance than the position P2 on the phosphorescent body 101, and as a result, with a visible afterglow luminance. Can be maintained for a long time. That is, incident light can be refracted and reflected in the gap between the tubular member 102 and the tubular member 102 to distribute the incident light to the phosphorescent body 101, and the emitted light can be condensed and extracted to the outside.
Moreover, it can manufacture simply by arrange | positioning the tubular member 102 in the box-shaped body 103. FIG.

(Example)
In order to confirm the usefulness of the present invention, a phosphorescent member according to an example having a configuration substantially similar to that of the phosphorescent member 100 shown in FIG. 5 was produced as follows.
That is, as the tubular member 102, a quartz glass tube having an inner diameter of 3.5 mm, a diametrical thickness of 0.7 mm, and an axial length of 50 mm was used.
Moreover, as the luminous body 101 interpolated in the tubular member 102, a high-luminance grade product of N nightglow manufactured by Nemoto Special Chemical Co., Ltd. (average particle diameter; phosphorescent particle of about 250 μm, chemical composition; SrAl ₂ O ₄ : Eu, Dy) was used.
Further, after the phosphorescent body 101 was inserted into the tubular member 102, the phosphorescent body 101 was sealed so as not to be released to the outside.
Twenty-four tubular members 102 having the phosphorescent body 101 inserted therein were produced, and arranged in the box 103 as a three-layer structure with eight pieces in one step.
As the box-shaped body 103, when the eight-stage tubular members 102 are arranged, the width of a size that does not cause a gap between the adjacent tubular members 102 and the layers of the tubular members 102 are accommodated in three stages. A container having a height capable of being prepared was prepared, and the inner wall surface of the container was covered with an aluminum foil reflective layer 104.

(Comparative Example 1)
In Example 1, the phosphorescent member according to Comparative Example 1 was produced in the same manner as in Example 1 except that the tubular member 102 was not used and the phosphorescent body 101 was deposited in the box 103.
As a result of investigating the relationship between the N night light quantity and the afterglow luminance of the phosphorescent body 101, it was confirmed that the phosphorescent body 101 has a thickness of 9 mm because it shows an almost constant afterglow luminance characteristic at a thickness of 5 mm or more. In the box 103.

(Comparative Example 2)
As a comparative product of the phosphorescent member according to the example, TF-42D15H manufactured by Taichi Tsutsuyama Kiln Co., Ltd. was prepared and used as the phosphorescent member according to Comparative Example 2.
The phosphorescent member according to Comparative Example 2 is entirely composed of a phosphorescent material obtained by kneading a translucent base material and phosphor particles, and this type of phosphorescent member has a relatively high afterglow luminance characteristic. Known as a thing.

Each luminous member according to Example 1, Comparative Example 1 and Comparative Example 2 was irradiated with light of D65 200 lux for 20 minutes, after stopping irradiation, after 10 minutes, after 20 minutes, after 60 minutes. Each afterglow brightness was measured. The conditions for irradiating light of D65 200 lux for 20 minutes are conditions used for the purpose of showing a certain product warranty in the product standards for safety signs (for example, JIS Z 9107). Each measurement was performed in a dark room, and a spectral radiance meter (CS-2000A manufactured by Konica Minolta Sensing Co., Ltd.) was used for each afterglow luminance measurement.
The results are shown in Table 1 below.

Next, in order to make the excited state of the phosphorescent body 101 closer to the saturation condition as a measurement condition of the afterglow luminance, the illuminance of D65 200 lux light with respect to each phosphorescent member according to Example 1, Comparative Example 1, and Comparative Example 2 Was increased to 1,000 lux, the irradiation time was extended from 20 minutes to 60 minutes, and afterglow was stopped, 10 minutes passed, 20 minutes passed, 60 minutes passed, and 120 minutes passed after each afterglow brightness was measured. .
The results are shown in Table 1 below.

  As can be seen from Table 1, the phosphorescent member according to the example showed higher afterglow luminance in all time zones than the phosphorescent member according to Comparative Examples 1 and 2.

Here, the numerical value of the afterglow luminance of each phosphorescent member described in Table 1 is an average value indicating the overall afterglow luminance of the phosphorescent member. That is, in the spectral radiance meter, the circular measurement spot area can be widened every time the distance between the detection unit and the measurement target is increased, and the numerical values shown in Table 1 are the diameters of the measurement spot areas. Is a result of measurement with a width of about 20 mm.
In this regard, in the phosphorescent member according to Example 1, the portion between the tubular members 102 (distance; twice the thickness of the glass tube of 0.7 mm) is an afterglow condensing unit, and the detection unit and the The afterglow luminance measured by shortening the distance to the measurement object and setting the diameter of the measurement spot region to about 1.5 mm and by close-up of the condensing part is as shown in Table 2 below. A high number was shown.

Furthermore, the time until reaching the lower limit of 3 mcd / m ^2, which is the lower limit value of the luminance at which human beings can visually recognize the outline of an object, is the case where light of D65 1,000 lux in Table 1 is irradiated for 60 minutes. The phosphorescent member was 56 hours or longer, the phosphorescent member according to Comparative Example 1 was approximately 39 hours, and the phosphorescent member according to Comparative Example 2 was approximately 30 hours. Moreover, in the condensing part of the luminous member which concerns on an Example, it was 110 hours or more.
As described above, the phosphorescent member according to the present invention functions as a phosphorescent capacitor including a plurality of layers of phosphorescent bodies saturated in the thickness direction, collects the light emitted from the phosphorescent body, Light can be emitted with higher brightness and longer time.

1, 51, 80, 100 Phosphorescent member 2, 52, 71, 104 Reflective layer 3, 53 Phosphor storage part 4, 54, 105 First layer 5, 55, 106 Second layer 6, 56, 72, 73, 76, 77, 79 Light distribution condensing part 57 Light scatterer 74, 78, 101 Light storage 75 Powder nozzle 102 Tubular member 103 Box 107 Third layer 200 Substrate 201 Light storage particle 202 First particle layer 203 Second particle layer 204 Third particle layer 205 Fourth particle layer 206 Protective layer A, B, C, D Interval L, L ₁ incident light L ₂ emitted light P ₁ , P ₂ position

Claims (15)

A plurality of phosphorescent bodies that contain phosphorescent particles and that are regularly arranged in parallel at intervals in a direction substantially orthogonal to one irradiation direction of incident light, and are arranged in a substantially layer shape as a whole. And
Translucent light that is arranged between adjacent phosphorescent body parts, distributes the incident light to be irradiated, guides it to the phosphorescent body part, collects the emitted light emitted from the phosphorescent body part, and emits it to the outside And a light distribution condensing part.   A plurality of layers formed by the phosphor layers are stacked, and at least a part of each phosphor layer in one layer is spaced apart from at least a part of each phosphor layer in another layer in the stacking direction. The phosphorescent member according to claim 1, which is regularly arranged to face each other.   The light storage member according to claim 2, wherein the light distribution condensing unit is disposed between layers formed by the stacked light storage units.   The light storage member according to any one of claims 1 to 3, wherein the light distribution condensing part contains a light scatterer.   Furthermore, it has a reflective layer which reflects incident light, The luminous material member in any one of Claim 1 to 4 with which a luminous body part and a light distribution condensing part are distribute | arranged on this reflective layer.   The phosphorescent member according to any one of claims 1 to 5, wherein an interval between adjacent phosphorescent body portions in the layer is 0.05 to 10 times the maximum width in the juxtaposed direction of the phosphorescent body portions. .   The phosphorescent member according to any one of claims 1 to 6, wherein an interval between adjacent phosphorescent body portions in the layer is 0.05 µm to 100 mm.   The phosphorescent member according to any one of claims 2 to 7, wherein an interval between the phosphorescent body portions arranged to face each other is 0.05 times to 10 times the maximum width in the juxtaposed direction of the phosphorescent body portions.   The phosphorescent member according to any one of claims 2 to 8, wherein an interval between the phosphorescent body portions arranged to face each other is 0.05 µm to 100 mm.   The phosphorescent member according to any one of claims 1 to 9, wherein the maximum width in the juxtaposed direction in the phosphorescent body portion is 0.5 µm to 100 mm.   The phosphorescent member according to any one of claims 1 to 10, wherein a maximum height of one incident direction of incident light in the phosphorescent body portion is 0.5 µm to 500 mm.   The light storage member according to any one of claims 1 to 11, wherein the light distribution condensing unit has a structure in which at least a space between adjacent light storage units in the layer is filled with a translucent member.   The phosphorescent member according to any one of claims 1 to 11, wherein the light distribution condensing part is formed of a member that can include the phosphorescent body part, has translucency, and has a curved surface at least partially.   The light storage member according to any one of claims 1 to 13, wherein the light distribution condensing part is formed of a tubular member having translucency and capable of inserting the light storage body part in an axial direction.   The phosphorescent member according to any one of claims 1 to 14, wherein phosphorescent bodies having different emission colors or emission intensities are used between at least two phosphorescent body portions.