JP2009235135A - Fluorescence emitting new light-accumulating body and apparatus applying the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a new light-accumulating material by dispersing light-accumulating ceramic powder in a silica gel with carbon introduced into its skeleton so as to emit fluorescence, and to obtain a light source which is human-friendly, conserves energy and is useful for disaster prevention by improving properties of an illumination lamp such as an LED as a point light source to properties as a surface light source. <P>SOLUTION: Light-accumulating resin pellets containing a fluorescing light-accumulating silica gel obtained by dispersing light-accumulating ceramic powder in a silica gel with carbon introduced into its skeleton are arranged on the back side of a light guide plate of an edge light comprising a plurality of LEDs, so that light emitted from the LEDs is made incident on the light-accumulating resin pellets and that light emitted by the LEDs is diffusely reflected from the pellet surface. Since the lighting-up time of the LEDs can be shortened by the afterglow effect of the light-accumulating material, energy is conserved. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a new phosphor that emits fluorescence and a luminaire using the same.

Conventional phosphorescent materials are phosphorescent ceramic powders whose structural formula is represented by SrAl ₂ O ₄ : Eu, Dy in Patent 35585994, or phosphorescent whose structural formula is represented by Sr ₄ Al ₁₄ O ₂₅ : Eu, Dy. Ceramic powder, phosphorescent ceramic powder whose structural formula is represented by MO.aAl ₂ O ₃ bSiO ₂ cL: fX in Patent No. 3856312, or phosphorescent ceramic powder composed of Sr ₂ MgSi ₂ O ₇ : Eu, Dy Patent 3257742 or Patent 3257947 has the structural formula m (Sr _1-a · Aa) O · n (Mg _1-b · J _b ) O · 2 (Si _1-c · Ge _C ) O ₂ : Eux, Lny In the phosphorescent ceramic powder shown or patent 3606302, the structural formula is (M · Eu) Al ₂ O ₄ · (M · Eu) O · n (Al _1-ab · B _b · Q _a ) ₂ · O ₄ Add resin pellets such as acrylic and polycarbonate to the phosphorescent ceramic powder shown and knead it using an extruder. Extruded into a string of about φ, cut into a luminous resin pellet with a length of 2 mm and a diameter of about 2 mmφ, and a luminous resin pellet in which phosphorescent ceramic powder is dispersed in an amount of 1 to 15 Vol% in the phosphorescent resin pellet. Then, the phosphorescent resin pellets were supplied to an injection molding machine to obtain molded products such as injection-molded plates.

However, since the phosphorescent ceramic powder is hard particles with a hardness close to that of alumina, the injection molding machine wears heavily, and the main part of the injection molding machine must be made using an expensive metal such as titanium. The molded product has a drawback of being extremely expensive.
In addition, it is inevitable that the wear powder of the injection molding machine is mixed in, and the phosphorescent material thus produced has a disadvantage that it is inevitable to have a slightly dark color.
However, the market demands brighter phosphors.
Moreover, when the thickness of the phosphorescent plate made by using an injection molding machine by the conventional method is increased from 0.6mm to 4mm, the afterglow brightness increases as the thickness increases. Even if the thickness was increased beyond that, the afterglow brightness could not be increased. This is data of a phosphorescent plate in which phosphorescent ceramic powder is dispersed by 3.2 Vol% (that is, 9.1 wt%) in the phosphorescent plate. When the thickness of the phosphorescent plate is 4 mm or more, the excitation light irradiated from the outside does not penetrate deeper than 4 mm. Therefore, even if the thickness is increased beyond 4 mm, the afterglow luminance is increased. I could not do it.

The present invention provides a means to remedy this drawback. That is, a phosphorescent body is provided in which the afterglow brightness increases with an increase in thickness even when the thickness is 4 mm or more.
It is another object of the present invention to provide a high-quality and inexpensive phosphorescent material that can be molded without using an injection molding machine and does not become black because there is no mixing of wear powder of the injection molding machine.

The first problem to be solved is that the conventional phosphorescent body is a molded body molded using an injection molding machine, so that the resulting phosphorescent body is inevitable to have a slightly dark color tone Need to be resolved.

The second problem to be solved is that when the thickness of the phosphorescent plate made using an injection molding machine is increased from 0.6 mm to 4 mm, the afterglow luminance increases as the thickness increases. Although it increases, it is a fault that the persistence luminance cannot be increased even if the thickness is increased to a thickness of 4 mm or more.

  The third problem to be solved is that it is too expensive because an expensive transparent resin with high transparency such as acrylic or polycarbonate is used to maximize the performance of the conventional phosphorescent ceramic powder.

Still, phosphorescent resin pellets made by kneading conventional phosphorescent ceramic powder with acrylic or polycarbonate resin using an extruder are made in large quantities as intermediate materials for injection molding, and the price of phosphorescent resin pellets themselves Because it is relatively inexpensive, if the phosphorescent resin pellet as an intermediate material is used as it is as the phosphor, and if a phosphor without injection molding can be made, it is relatively inexpensive, so the phosphorescent resin pellet is used to make a cheap and good phosphor Finding the means is one of the issues to solve the third problem.

Another problem to solve the third problem is to find a means to replace acrylic and polycarbonate by using inexpensive transparent ceramic without using expensive transparent resin such as acrylic and polycarbonate. is there.

In order to solve the first problem, the present invention first uses a gelling catalyst that hydrolyzes and gelates a silicon alkoxide solution such as tetraethoxysilane, for example, a gelling catalyst such as hydrochloric acid. Alternatively, the gelation of the silicon alkoxide solution is started by heating, and the phosphorescent ceramic powder is added in an amount of 1 to 15 Vol% with respect to the volume of the dry silica gel in the gel viscous material where gelation has started. A sol-gel method is used in which the silicon alkoxide is further hydrolyzed by kneading and dispersing, followed by polycondensation and gelation, and the resulting silica gel is baked and pulverized to form phosphorescent silica gel.

That is, in a gel viscous material obtained by gelling alcoholic silica sol,
Patent 3585994 is a phosphorescent ceramic powder whose structural formula is SrAl ₂ O ₄ : Eu, Dy, or a phosphorescent ceramic powder whose structural formula is Sr ₄ Al ₁₄ O ₂₅ : Eu, Dy, or Patent No. 3856312 has the structural formula SrO _. AAl ₂ O ₃ bSiO ₂ : cL, fX
(L is a mineral agent, alkali halide and / or ammonium halide salt and / or ammonium phosphate, X is Eu or Dy, a, b, c, f are constants) When adding 1 to 15 Vol% to the silica gel volume and dispersing it, and heating the gel viscous material in which the alcoholic silica sol is gelled,
The silica gel particles are characterized by heating the gel at a temperature below the range in which divalent Eu is not oxidized to become trivalent Eu, shrinking the gel, and evaporating alcohol components and moisture to form dry silica gel. A phosphorescent silica gel phosphor in which the phosphorescent ceramic is dispersed by 1 to 15 Vol% can be obtained.

In addition, in a gel viscous material obtained by gelling an aqueous silica sol, a phosphorescent ceramic having high water resistance, that is, a phosphorescent ceramic powder whose structural formula is Sr ₂ MgSi ₂ O ₇ : Eu, Dy or a structural formula thereof is Sr _4. Al ₁₄ O ₂₅ : Luminescent ceramic powder represented by Eu, Dy, or Patent 3257842 or Patent 3257947, whose structural formula is m (Sr _1-a · Aa) O · n (Mg _1-b · J _b ) O・ 2 (Si _1-c · Ge _C ) O ₂ : Eux, Lny
(A is Ca or Ba, J is Be or Zn or Cd, Ln is Dy or La, a, b, c, m, n, x, y are constants), or Patent 3606302 Its structural formula is (M · Eu) Al ₂ O ₄ · (M · Eu) O · n (Al _1-ab · B _b · Q _a ) ₂ · O ₄
(M is Sr, Ca or Mg, Q is Dy, a and b are constants) and is added and dispersed in an amount of 1 to 15 Vol% with respect to the volume of dry silica gel. When heating the gelled viscous material, heat the gel at a temperature below the range where divalent Eu is not oxidized to become trivalent Eu, shrink the gel and evaporate the water to make dry silica gel It is possible to obtain a phosphorescent silica gel phosphor in which the phosphorescent ceramic is dispersed in 1 to 15 Vol% in silica gel particles.

When alcoholic silica sol or aqueous silica sol is used, when the gel viscous material is heated at a temperature below the range where divalent Eu is not oxidized to become trivalent Eu, the temperature is 400 ° C. or lower when heated in the air. Heat with.

Moreover, when heating in nitrogen, it heats at the temperature of 800 degrees C or less.

The molecular formula of silica gel is SiO ₂ · nH ₂ O.
In the above, the silicate end is a double bond of Si and oxygen,
What was processed so that the silicate terminal may become Si (OH) 2 may be used.
Further, silica gel chemically modified with a hydrophobic group may be used in the same manner as silica gel used for reverse phase chromatography.

When the gel viscous material is heated at a temperature below the range where divalent Eu is not oxidized to become trivalent Eu, heating is performed below the temperature at which the hydrogen content of the alcohol added to the aqueous silica sol or alcoholic silica sol remains. Thus, a phosphor can be obtained in which hydrogen remains in the contracted silica gel so that divalent Eu is not oxidized to trivalent by the reducing power of the remaining hydrogen.

In this way, phosphorescent silica gel in which phosphorescent ceramic powder is dispersed in silica gel is superior in heat resistance compared to phosphorescent resin pellets dispersed in resin, so that it is like a high-temperature halogen lamp or xenon lamp. It is also suitable as a phosphorescent material used near the light emitting surface of a simple light source. The phosphorescent ceramic powder itself is an inorganic material and has high heat resistance, and silica gel has high heat resistance.

As a second method for solving the first problem of the present invention, first, gelation is performed using a gelation catalyst that changes the pH of a silica sol solution such as an aqueous silica sol, for example, a base catalyst such as ammonia. In the gel viscous body where gelation has started, the phosphorescent ceramic powder is added in an amount of 1 to 15 Vol% with respect to the volume of dry silica gel and kneaded using a kneader to disperse the gel. The sol-gel method is used in which the resulting silica gel is fired and pulverized to form phosphorescent silica gel.
Although finer particles such as an average particle diameter of 3 μm can be used for the phosphorescent material powder, the phosphorescent performance is lowered. Further, when a particle having a large particle diameter such as an average particle diameter of 100 μ is used, the luminous performance is further increased. Since this was kneaded in a silica gel viscous material, even if a phosphorescent ceramic powder having a large particle size was used, the phosphorescent ceramic powder did not settle during kneading and could be well dispersed by kneading.

In addition, as a third method for solving the first problem of the present invention, phosphorescent ceramic powder having an average particle diameter of 100 μm is mixed in an acrylic or polycarbonate resin pellet by 1 to 15 Vol%, and a known extruder is used. The resin pellets and the phosphorescent material powder are kneaded almost uniformly, extruded from a die hole of about 4 mm to form a string-like resin, and the string-like resin is cut using a pelletizer to have a major axis of 3.4 mm and a minor axis of 2 A phosphorescent resin pellet having an elliptic cylindrical shape having a height of 0.7 mm and a height of 3.8 mm was produced.
As the transparent resin to be used, an ABS resin, a polycarbonate resin, a polypropylene resin, an epoxy resin, a silicone resin and the like can be used in addition to the acrylic resin.

Even when the comparative experiment was conducted visually, a large difference was clearly confirmed.
The JIS Z 9107 standard 100 wt% phosphorescent raw material powder used in the conventional emergency guide plate was excited for 4 minutes and then turned off, and the afterglow brightness after 2 hours was 10 mcd / square meter. The phosphorescent material having a thickness of 3.2 mm containing the phosphorescent ceramic in the acrylic resin of the present invention is excited for 4 minutes, then turned off, and the afterglow brightness of the phosphorescent material after 2 hours is 40 mcd / It was a square meter.
The major difference is that the conventional 100 wt% phosphorescent material does not reach the inside of the phosphorescent material and only slightly excites the surface of the phosphorescent material raw powder, but only the surface glows. This is because the 5 mm-thick phosphorescent material containing the conductive ceramic reaches the depth of 5 mm and absorbs the light energy of the light source to store the light, so that the entire 5 mm mass glows and the afterglow luminance is high.

Gelation catalyst that hydrolyzes and gelates silicon alkoxide solution such as tetraethoxysilane, for example, gelation catalyst such as hydrochloric acid or heats to start gelation of silicon alkoxide solution. The phosphorescent ceramic powder is added to the volume of the dried gel by 3.2 vol% with respect to the volume of the dry silica gel, and is kneaded and dispersed using a kneader to further promote the hydrolysis reaction of the silicon alkoxide. Gelation is performed by condensation polymerization, and the resulting silica gel is baked and pulverized to obtain phosphorescent silica gel containing phosphorescent ceramic powder in an amount of 3.2 Vol%.
Further, in order to prevent the divalent Eu from being oxidized to trivalent by firing, the firing is performed at a temperature of 400 ° C. or less in the air firing, and at a temperature of 800 ° C. or less in the firing in nitrogen.
Further, if baking is performed at a temperature at which the hydrogen content in the alkoxide of silicon is not completely eliminated, divalent Eu can be prevented from being oxidized to trivalent due to the reducing property of hydrogen.

Also, use a gelling catalyst that changes the pH of the silica sol solution, such as aqueous silica sol, for example, a gelling catalyst such as hydrochloric acid, or heat the gel to start gelation and store in the gel viscous material where gelation has started. 3 vol% of the dry ceramic powder is added to the volume of the dry silica gel and kneaded and dispersed using a kneader. The silica gel that has been further gelled is fired and pulverized to obtain 3 phosphorescent ceramic powder. .Luminous silica gel containing only 2Vol%.
Further, in order to prevent the divalent Eu from being oxidized to trivalent by firing, the firing is performed at a temperature of 400 ° C. or lower when firing in air and at a temperature of 800 ° C. or lower when firing in nitrogen.

As applied products,
(a) A light guide plate for edge light having reflective dots printed on the back surface of a transparent resin plate, or
(b) a light guide plate for edge light provided with a reflection groove on the back surface of the transparent resin plate, or
(c) a light guide plate for edge light in which fine particles for reflection are dispersed inside a transparent resin plate, or
(d) a light guide plate for edge light whose thickness decreases as the distance from the edge light source increases,
The edge light guide plate is arranged using at least a part of the rear surface of the edge light light guide plate, using the light guide plate for edge light. The light storage layer has a two-layer structure, and the light from the edge light is reflected inside the light guide plate for edge light and emitted to the surface of the light guide plate for edge light, Part of the reflected light is incident on the phosphor layer disposed on the back surface of the light guide plate for edge light, excites the phosphor of the phosphor layer, accumulates part of the light energy, and The edge light is emitted to the front surface and the back surface of the light guide plate for edge light, and the edge light using the phosphor layer shown in any one of claims 1 to 7 can be manufactured.

300 g of tetramethoxysilane at 15 ° C. was put into a 1 liter glass container, and stirred using an agitator at 80 rpm. Next, 120 g of pure water at 15 ° C. was added.
When stirring is continued and a uniform sol is obtained, when the temperature is raised to 25 ° C. and the silica gel begins to become a silica gel, one fifth and four fifths of the total mass of the viscous material are separated. Gelation was further advanced to obtain a solid gel.
After taking out the solid gel, it was pulverized so that the average particle size was 500 μm.
This was packed in a quartz boat and vacuum-dried at 120 ° C. This was dried at 400 ° C. for 1 hour in an air baking furnace to obtain silica gel. The silica gel has a BET specific surface area of 25 square meters per gram according to the nitrogen adsorption method.
The carbon content of the silica gel was 0.15 wt%. The carbon content was tested by first quantifying the gas obtained by burning the gel at 1450 ° C. and examining the carbon content.
When this silica gel was spread in a non-fluorescent container and irradiated with black light having a central wavelength of 365 nm, the silica gel emitted white fluorescence.

Further, when the remaining four-fifth silica gel viscous material separated above is mixed with phosphorescent ceramic powder made of strontium aluminate by 3.2 Vol% with respect to the volume of dry silica gel, and kneaded and uniformly dispersed, Gelation was advanced and vacuum drying was performed at 120 ° C. This was dried at 400 ° C. for 1 hour in an air baking furnace to obtain dry silica gel.
In this silica gel, strontium aluminate particles were dispersed in silica gel, and the volume ratio of strontium aluminate was set to 3.2 Vol% of the whole.
This new phosphorescent material having strontium aluminate particles dispersed in silica gel is characterized in that not only strontium aluminate emits long afterglow, but also silica gel part emits white fluorescence. Therefore, the new phosphorescent material with 3.2 vol% strontium aluminate particles dispersed in silica gel is clear compared to the conventional phosphorescent resin pellets with 3.2 vol% strontium aluminate particles dispersed in acrylic resin. A long afterglow with a color tone closer to white was generated visually.

Regarding the reason why the fluorescent silica gel emits fluorescence, the following hypothesis exists. As shown in the structural formula on the left side of Fig. 1 (a), a carbon compound (presumed to be carbon dioxide) is replaced with a silicon atom (Si) in the silica gel skeleton in the same form in a glassy silica gel network. It is confined. When this is exposed to ultraviolet light, the carbon-oxygen or silicon-oxygen chemical bond of the confined carbon compound is broken, and an excited state is obtained as shown in the structural formula on the right side of FIG. It is a hypothesis that fluorescence is emitted when the excited state returns to the left structure which is the original defined state. The fluorescent center is considered to be a carbon compound incorporated into silica gel.

When silica gel is produced using alcoholic silica sol as a starting material, the carbon in the silica gel network is confined in a form in which the carbon in methanol, ethanol, isopropanol and other carbon compounds is replaced by the same type of silicon atoms (Si) in the silica gel skeleton.

When silica gel is produced using an aqueous silica sol as a starting material, a small amount of alcohol, which is a water-soluble hydrocarbon such as methanol, ethanol, isopropanol or the like, is added to the silica sol, and the carbon in the water-soluble hydrocarbon is converted to silicon atoms (Si ) Can be confined in the form of isomorphic replacement.

The resulting silica gel is first dried at a normal pressure of 200 ° C. or lower, and then dried at a normal temperature of 350 ° C. to 600 ° C.
FIG. 1 (a) shows a silica gel skeleton in which carbon is confined.
In the figure, Si represents a silicon atom, C represents a carbon atom, and O represents an oxygen atom.

FIG. 1 (b) shows the fluorescence spectrum emitted by the silica gel when the resulting silica gel is irradiated with 245 nm light obtained by spectroscopy from a xenon lamp light source. This is shown in (1). The change in fluorescence intensity when the wavelength of the irradiated light is changed from 240 to 450 nm and the fluorescence wavelength to be detected is 540 nm is shown in (2).

  FIG. 2 shows a cross-sectional view of one particle of silica gel in which the phosphorescent ceramic particles of the present invention are dispersed. One of the phosphorescent ceramic particles is designated 201. The silica gel portion is indicated by the numeral 202. The silica gel 202 portion emits white fluorescence.

FIG. 3 shows a schematic diagram in which only one phosphorescent ceramic particle 301 is dispersed in the silica gel particle 302.
Excitation light 303 incident from the outside enters the phosphorescent ceramic particles 301 and accumulates while passing through the phosphorescent ceramic particles 301 or reflecting from the surface. Of course, the excitation light 303 passing through the inside of the silica gel 302 generates white fluorescence in the silica gel 303.

FIG. 4 shows a large number of phosphorescent material particles 402 in which phosphorescent ceramic particles are dispersed. Number 401, one of the phosphorescent ceramic particles, is dispersed in the silica gel. The same applies to other phosphorescent ceramic particles and other silica gel particles.
A transparent resin liquid 404 is impregnated between these many silica gel particles and cured to form an integral phosphorescent material sheet or phosphorescent material block.
Using phosphorescent silica gel particles with phosphorescent ceramic dispersed inside this silica gel,

(a) A sheet-like phosphor that arranges the phosphorescent silica gel particles in a sheet shape and connects the phosphorescent silica gel particles with a transparent resin binder, or
(b) a block-shaped luminous body filled with the luminous silica gel particles in a rectangular parallelepiped transparent container, or
(c) A block-shaped phosphorescent body in which the phosphorescent silica gel particles are filled in a rectangular parallelepiped transparent container and the phosphorescent silica gel particles are connected by a transparent resin binder, or
(d) a parabolic mirror or a concave mirror-shaped phosphorescent body in which the phosphorescent silica gel particles are arranged on a mirror surface of a parabolic mirror or a concave mirror, and the phosphorescent silica gel particles are connected by a transparent resin binder, or
(e) a phosphorescent material obtained by mixing the phosphorescent silica gel particles shown in (a) to (d) with a transparent resin piece, a transparent ceramic piece, a transparent resin bead, or a transparent ceramic bead;
It is possible to make a phosphorescent material characterized by having any one of the structures.

Further, instead of the transparent resin liquid 404, the silica gel viscous liquid is used to fill a space between a large number of the phosphorescent material particles 402 in which phosphorescent ceramic particles are dispersed, and the gelling is progressed to solidify the solid phosphorescent material sheet or phosphorescent material block. It can be.

Further, since the silica gel particles 402 can be made into fine particles of 500 μm or less by mechanical pulverization, the fine silica gel particles can be dispersed in clear lacquer or liquid silicone and applied as a phosphorescent paint.

FIG. 5 shows phosphorescent ceramic particles 501 dispersed in transparent acrylic or polycarbonate resin 502 to form phosphorescent resin pellets 505, and a transparent resin liquid or silica gel viscous material 504 is filled between a large number of phosphorescent resin pellets 505. The solidified light storage material sheet or the light storage material block that is solidified is shown.

(a) A sheet-shaped phosphor that arranges the phosphorescent resin pellets in a sheet shape and connects the phosphorescent resin pellets with a transparent resin binder, or
(b) A sheet-shaped phosphor that arranges the phosphorescent resin pellets in a sheet shape and heats them to thermally fuse the phosphorescent resin pellets, or
(c) a block-shaped luminous body filled with the luminous resin pellets in a rectangular parallelepiped transparent container, or
(d) A block-shaped phosphorescent body in which the phosphorescent resin pellets are filled into a rectangular parallelepiped transparent container and the phosphorescent resin pellets are connected with a transparent resin binder, or
(e) a parabolic mirror or concave mirror-shaped phosphorescent body in which the phosphorescent resin pellets are arranged on the mirror surface of a parabolic mirror or concave mirror, and the phosphorescent resin pellets are connected by a transparent resin binder, or
(f) A parabolic mirror or a concave mirror-shaped phosphor, in which the phosphorescent resin pellets are arranged on a mirror surface of a parabolic mirror or a concave mirror and heated to thermally fuse the phosphorescent resin pellets.
(g) a phosphorescent material obtained by mixing a transparent resin piece, a transparent ceramic piece, a transparent resin bead, or a transparent ceramic bead with the luminous resin pellet shown in (a) to (f),
It is possible to make a phosphorescent material characterized by having any one of the structures.

FIG. 6 shows phosphorescent resin pellets 602 or phosphorescent silica gel particles 603 such as acrylic and polycarbonate. The phosphorescent resin pellet 602 or phosphorescent silica gel particles 603 is filled in a transparent resin case 604. Reference numeral 605 denotes a lid of the transparent resin case 604. A transparent resin liquid or a silica gel viscous material may be injected between each of the phosphorescent resin pellets 602 or phosphorescent silica gel particles 603 and solidified. Alternatively, the phosphorescent resin pellets 602 or phosphorescent silica gel particles are not injected into the case. It is only necessary to store 603.

A plurality of LEDs 701 are used as edge light LEDs as shown in the cross-sectional view of FIG. 7, and the phosphor layer 703 shown in claim 1 to 7 is arranged on the back surface of the light guide plate 702 of the edge light. A two-layer structure is formed in the order of the light guide plate 702 for use and the phosphorescent material layer 703. As a result, the light generated from the edge light is reflected inside the edge light light guide plate 702 and emitted to the surface of the edge light light guide plate 702, while part of the reflected light is reflected on the back surface of the edge light light guide plate 702. The light incident on the arranged phosphor layer 703 excites the phosphor of the phosphor layer 703 to accumulate part of the light energy, and part of the accumulated light is stored on the surface of the light guide plate 702 for the edge light and the phosphor The light is emitted to the back surface of the body layer 703. The edge light guide plate 702 decreases in thickness as it is farther from the LED, and when multiple reflections are made in the light guide plate, the farther from the LED, the more the number of multiple reflections is increased, thereby improving the performance of the edge light. An example is shown. The end surface reflectors 705 are provided on three end surfaces other than the incident surface of the edge light LED 701.

In FIG. 8, a reflector 804 is provided further behind the phosphor layer 803, and the edge light guide plate 802, the phosphor layer 803, and the reflector 804 are stacked in this order, and the LED 801 installed on the edge is formed. Light is reflected inside the edge light guide 802 and emitted to the surface of the edge light guide plate 802, and part of the reflected light is reflected on the phosphor layer 803 disposed on the back surface of the edge light guide plate 802. Incident, excites the phosphor layer 803 to accumulate part of the light energy, and part of the accumulated light is emitted to the surface of the light guide plate 802 for edge light, and the other of the accumulated light. The portion is retroreflected by the reflector 804 disposed on the back surface of the phosphor layer 803 and radiated toward the surface of the light guide plate 802 for edge light.

If dots (not shown) are printed on the back surface of the edge light light guide plate 802, the light of the LED 801 is reflected by the dots and emitted toward the surface of the edge light light guide plate 802, and a part of the light is disposed on the back surface. The light is incident on the phosphor layer 803, is stored, is emitted toward the surface of the light guide plate 802, and a part of the light is reflected back by the reflection plate 804 and is emitted toward the surface of the light guide plate 802.
Further, it is known that when the reflection plate 804 is removed and a two-layer structure including only the back surface light storage layer 803 and the light guide plate 802, the back surface light storage layer 803 functions similarly to the reflection plate 804.

Further, the same effect can be obtained even if dots are not printed on the back surface of the light guide plate 802 for edge light, and a line (not shown) is printed or chopped.

Further, the same effect can be obtained by dispersing fine particles in the light guide plate 802 for edge light and increasing the dispersion rate as the distance from the LED 801 increases.
FIG. 8A is a cross-sectional view, and FIG. 8B is a plan view. A diffusion plate 806 may be attached to the surface of the light guide plate 802. Reference numeral 805 denotes an end face reflector, and an aluminum foil or the like is used.
The end surface reflector 805 is attached to three end surfaces other than the end surface to which the LED 801 is attached.
This is the same as in the case of FIG.

FIG. 9 is an enlarged sketch of one phosphorescent material 903 made of phosphorescent resin pellets in which phosphorescent ceramic powder 901 is dispersed in acrylic or polycarbonate, or silica gel powder in which phosphorescent ceramic powder 901 is dispersed in silica gel.
The phosphorescent ceramic powder 901 made of strontium aluminate is dispersed almost uniformly in the phosphorescent material 903, and when the volume ratio of the phosphorescent ceramic powder 901 is 1 to 15 Vol%, the phosphorescent ceramic powder 901 is dispersed. The powder 901 not only absorbs light emitted from the outside such as an LED, but also passes through a transparent ceramic portion 902 made of a transparent resin or silica gel, and the light such as the LED is not shown in the figure away from the LED. Light also reaches another phosphorescent pellet. If the average particle diameter of the phosphorescent ceramic powder 901 is 100 μm, the light from the LED or the like is moderately scattered in the phosphorescent material by the phosphorescent ceramic powder 901. There is also light that passes through the gap between the phosphorescent pellets 903 and reaches.
As a result, the phosphorescent material can absorb and store strong light.

Certain types of strontium aluminate, which is a phosphorescent ceramic, have the property of easily hydrolyzing when it encounters moisture, so silica gel powder with phosphorescent resin pellets and phosphorescent ceramic dispersed in a rectangular parallelepiped transparent case If the gap between the phosphorescent materials made of silica gel powder dispersed with phosphorescent resin pellets or phosphorescent ceramic is filled with transparent resin, it will be shielded from extraneous moisture It has been found that phosphorescent ceramics are difficult to hydrolyze. Further, a transparent resin, a transparent ceramic, a piece of glass or a bead may be mixed together with a phosphorescent material made of silica gel powder in which a phosphorescent resin pellet or phosphorescent ceramic is dispersed. If it does in this way, the light which passed transparent resin or transparent ceramic will reach deep in the phosphorescent body, and will be stored, and afterglow brightness will increase more.

FIG. 10 shows one of silica gel powders 1003 in which phosphorescent resin pellets or phosphorescent ceramics are dispersed. A large number of silica gel powders 1003 dispersed with phosphorescent resin pellets or phosphorescent ceramics are filled using a case 1004 so that the head of the LED 1001 is exposed. In this way, the light emitted from the LED 1001 is not attenuated so much, is emitted to the upper surface, and the luminous effect of the luminous material 1004 can be used.

As shown in FIG. 11, a parabolic mirror or concave mirror-shaped phosphorescent body in which a phosphorescent material 1103 made of silica gel powder in which the phosphorescent resin pellets and phosphorescent ceramic are dispersed is arranged on the mirror surface of a parabolic mirror or concave mirror 1104. Or a parabolic mirror in which a phosphorescent material made of silica gel powder in which a phosphorescent resin pellet or phosphorescent ceramic is dispersed is arranged on the mirror surface of a parabolic mirror or a concave mirror, and the phosphorescent resin pellets are connected by a transparent resin binder. Alternatively, a concave specular phosphor can be made.

In FIG. 11A, a phosphorescent material 1103 made of silica gel powder in which the phosphorescent resin pellets and phosphorescent ceramic are dispersed is arranged on the mirror surface of a parabolic mirror or concave mirror 1104, and a transparent resin or the like is provided between a plurality of phosphorescent materials 1103. It is the Example connected with these. In particular, when the phosphorescent resin pellets are used, the phosphorescent resin pellets may be arranged on the mirror surface of the parabolic mirror or concave mirror 1104, heated, and heat-sealed. An LED, a halogen lamp, a xenon lamp, a tungsten lamp, or the like is shown as the light emitter 1101.

FIG. 11B shows a case in which the phosphorescent resin pellets using the case 1102 are arranged when the phosphorescent material 1103 made of silica gel powder in which the phosphorescent resin pellet or phosphorescent ceramic is dispersed is arranged on the mirror surface of a parabolic mirror or concave mirror 1104. An embodiment in which a phosphorescent material 1103 made of silica gel powder in which phosphorescent ceramic is dispersed is held.

Moreover, you may make the phosphorescent material sheet | seat which is not illustrated by connecting the luminous material which consists of silica gel powder which disperse | distributed luminous phosphor pellets and luminous ceramics using a transparent resin binder, without using transparent cases, such as a rectangular parallelepiped shape. When phosphorescent resin pellets are used, the phosphorescent resin pellets may be arranged in a mold (not shown) in the form of a sheet or block, pressed, heated, and thermally fused together.

Further, using a metal or glass rail having a V-shaped, U-shaped, semicircular or semi-elliptical cross section, the luminous silica gel particles shown in claim 1 and claim 2 are filled in the opening of the rail, A phosphorescent material characterized in that phosphorescent silica gel particles are connected to each other using a transparent resin binder can be produced.

Further, using a metal or glass rail having a V-shaped, U-shaped, semicircular or semi-elliptical cross section, the luminous resin pellet shown in claim 7 is filled in the opening of the rail, and the luminous resin pellet A phosphorescent material characterized in that the phosphorescent resin pellets are connected to each other using a transparent resin binder or the phosphorescent resin pellets are heated and the phosphorescent resin pellets are thermally fused to each other can be produced.

FIG. 12 shows an embodiment in which a metal or glass rail 1201 having a V-shaped cross section is arranged in the vicinity of the side of a straight tube type LED light having a shape similar to a fluorescent lamp. The opening 1202 of the metal or glass rail was filled with the phosphorescent resin pellet 1203, and then the phosphorescent resin pellet 1203 was heated together with the rail, and the phosphorescent resin pellets 1203 were thermally fused to form an integral phosphor. This phosphor is excited by the light from the LED light to accumulate light, and emits long afterglow when the LED light is extinguished.
FIG. 12A shows a rail having a V-shaped cross section, and FIG. 12B shows a view in which a phosphorescent material is fused to the opening of the rail.
The metal or glass rail is not limited to the V shape, and may be a U shape or a metal or glass rail having a semicircular or semielliptical cross section.

Further, as shown in FIG. 13, a metal or glass rail having a V-shaped, U-shaped, semi-circular or semi-elliptical cross section is arranged near the side of a straight tube type LED light having a shape similar to a fluorescent lamp. Alternatively, the opening 1202 of the metal or glass rail may be filled with phosphorescent silica gel particles, and the phosphorescent silica gel particles may be connected with a transparent resin binder or a silica gel viscous binder to solidify the binder to form an integral phosphorescent body.
This phosphor is excited by the light from the LED light to accumulate light, and emits long afterglow when the LED light is extinguished.

FIG. 13 shows an LED substrate 1301 used for a straight tube type LED light. A plurality of LEDs 1302 are arranged on the substrate 1301. The light emitted from the LED 1302 is incident on a phosphorescent pellet (not shown) filled in an opening 1304 of a metal or glass rail 1303 and heat-sealed with each other or a silica gel phosphor (not shown) connected with a binder to excite the phosphor. When the LED is turned off, the phosphor stores a long afterglow.

FIG. 14A shows a cross section of a metal or glass rail 1401 having a U-shaped cross section. The rail opening 1402 is filled with a phosphor (not shown).
FIG. 14B shows a cross section of a metal or glass rail 1403 having a semi-elliptical cross section. The rail opening 1404 is filled with a phosphorescent material (not shown).

FIG. 15 shows an example in which a light guide plate 1501 and an LED for edge light 1502 are used instead of the straight tube type LED substrate 1301 and the LED 1302 used in FIG.
The light guide plate 1501 and the LED 1502 are placed at the position of the substrate 1301 in FIG. 13, the light from the LED 1502 is guided by the light guide plate 1501, and the light emitted from the surface 1503 of the light guide plate 1501 is illustrated in the same manner as the metal or glass rail 1303. It is made to enter into the phosphorescent material filled in the opening of the metal or glass rail that is not excited to excite the phosphorescent material so that the phosphorescent material generates a long afterglow when it is turned off.

The LED is not limited to a long rectangular straight tube type LED substrate such as the substrate 1301, but a donut-shaped LED substrate is a substrate in which LEDs are arranged on a square substrate at equal intervals such as a grid pattern. May be.
In addition to the LED, the light source may be a cold cathode tube, a fluorescent lamp, a halogen lamp, or a xenon lamp.

In addition, a phosphorescent material made of silica gel powder in which phosphorescent resin pellets or phosphorescent ceramics are dispersed can be mixed with a transparent paint vehicle to form a phosphorescent paint.

Buildings are obliged to install emergency guide boards under the Fire Service Law, and the current phosphorescent performance of emergency guide boards is not very satisfactory as described above. Therefore, it is possible to provide an emergency guide board combined with evacuation guide light and general lighting equipment having long afterglow performance, which can contribute to improvement of safety in case of disaster such as a power failure.
Moreover, since it has a long afterglow performance due to light storage, it can be visually recognized even if it is turned off intermittently, so that energy saving of general lighting can be achieved by intermittent lighting or pulse lighting, which can contribute to carbon dioxide reduction and prevention of global warming.

Since the present invention is configured as described above and has the above-described effects, not only the point light source property of an LED or the like can be made a surface light source property by the edge light light guide plate but also the back surface of the light guide plate when the LED or the like is turned off. Since this phosphorescent material emits strong light, it can be used as an evacuation guide lamp / evacuation guide lamp, and an evacuation guide lamp / evacuation guide lamp useful for disaster prevention and general lighting equipment can be provided.

In addition, it can be used as soft direct lighting that is friendly to humans, using LED and other lighting as a surface light source, which has not been used for indirect lighting due to its strong point light source properties. In addition, as described above, an energy-saving light source that illuminates the phosphor in the event of a power outage can be created, thus contributing to the prevention of global warming.
It can also provide lighting for evacuation guidance in the event of a power outage accident in the subway.

Searched for prior art in the JPO Digital Library. The search formula for searching for patent applications = (silica gel + silicate gel + silicate gel) & (phosphorescence + nocturnal light + afterglow) has 5 hits, and this application does not conflict with any of the following 5 cases. 1. Japanese Patent Application Laid-Open No. 2005-340192 Lamp with long afterglow 2. Japanese Patent Application Laid-Open No. 08-043556 Luminescent hourglass 3. Patent 3948757 Luminescent material with long afterglow of silicate and its manufacturing method 4. Japanese Patent Publication No. 05-036062 Odorant 5. 3101899 Rechargeable Luminescent Buoy

Furthermore, the search formula for searching for patent applications = (silica gel + silicate gel + silicate gel) & fluorescent search, the number of hits is 94, and this application does not conflict with any of the following 94 cases. 1. Japanese Patent Application Laid-Open No. 2008-028384 Light-Emitting Diode Encapsulation Structure 2. Japanese Patent Application Laid-Open No. 2007-322118 A refreshing and healthy forest air conditioner 3. Japanese Patent Application Laid-Open No. 2007-284679 A composite material including a carbon nanotube and a manufacturing method thereof -234613 Flat light emitting lamp device and method for producing the same 5. JP 2007-131641 A Method and composition for the synthesis of labeled oligonucleotides and analogs on a solid support 6. JP 2007-123390 Light emitting device 7. Special Open 2007-005748 Optoelectronic Semiconductor Device 8. JP 2006-313675 FLUORESCENT DISPLAY TUBE 9. JP 2006-189843 DISPLAY FILTER AND ITS MANUFACTURING METHOD 10. JP 2006-081618 AIR CLEANING DEVICE 11. JP 2005-340192 LONG Lamp having afterglow 12. Japanese Patent Application Laid-Open No. 2005-276808 Flat light emitting lamp device and manufacturing method thereof 13. Japanese Patent Application Laid-Open No. 2005-268154 Method of manufacturing field emission cold cathode, field emission cold cathode, and field emission image display device 14 JP 2005-150484 SEMICONDUCTOR Coating for optical element, method for producing the same, and semiconductor light-emitting device 15. JP 2005-145849 NOVEL MATERIAL 16. JP 2005-037287 ANALYSIS DEVICE AND METHOD FOR ANALYSIS OF NITRO POLYAROLAR Aromatic Hydrocarbons in Diesel Particles 17. -355891 Field emission cold cathode, method for producing the same, and field emission type image display device 18. Inorganic molded body decorated with nanoparticles and method for producing the same 19. Japanese Patent Application Laid-Open No. 2004-226234 Functional beads, therefor Reading method and reading device 20. JP-A-2004-093331 High-sensitivity affinity reaction detection chip, method for producing the same, and detection device 21. JP-A-2003-335962 Flame-retardant film material sheet and flame-retardant film material 22. -284552 Polymer chip for identification of ionic polymer and identification method of ionic polymer 23. Japanese Patent Application Laid-Open No. 2003-257666 Organic EL display 24. Japanese Patent Application Laid-Open No. 2003-213254 Method of manufacturing silicate phosphor 25. Japanese Patent Application Laid-Open No. 2003-201473 Zinc oxide Ca-based inorganic porous phosphor and method for producing the same 26. JP 2003-201118 A method for producing inorganic metal compound powder 27. JP 2003-155478 A fluorescent silica gel and method for producing the same 28. JP 2002-357595 A method for measuring diphenylanthracene 29. JP 2002-284641 Label makeup cosmetics 30. JP 2002-282816 Organic halide treatment facility monitoring system 31. JP 2002-020127 Synthetic quartz glass powder and synthetic quartz glass molding 32. JP 2002-014032 Method for Inspecting Synthetic Quartz Glass Powder or Silica Gel 33. JP-A-2001-200248 Electroluminescent Phosphor, Method for Producing the Same, and Organic Dispersive Electroluminescent Device 34. JP-A-2001-122676 Method for Producing Humidity-Containing Tile and Humidity-Containing Tile 35. JP-A-2000-070726 Oxide photocatalyst and article provided with the same 36. JP-A-11-317157 Manufacturing method of electron-emitting device, image forming apparatus, etc. 37. JP-A-11-290697 Photocatalytic titanium oxide and photocatalyst Odor, and photocatalytic deodorization, environmental purification device 38. JP-A-11-056392 Enzyme activity measurement method and binding measurement method 39. JP-A-10-245389 Novel antiviral active substance 40. JP-A-10-019785 Optical waveguide sensor 41. Japanese Patent Application Laid-Open No. 09-208414 Key for antibacterial treatment for musical instruments 42. Japanese Patent Application Laid-Open No. 09-171011 Gas reactive dye, gas detection material, gas detection method or gas detection apparatus using the same reactive dye 43. Japanese Patent Application Laid-Open No. 08-048605 And its production method 44. Japanese Patent Application Laid-Open No. 08-043308 Antibacterial Material Addition Determination Device and Method 45. Japanese Patent Application Laid-Open No. 07-278348 Antibacterial Resin Composition 46. Japanese Patent Application Laid-Open No. 07-232060 Chemical Substance Adsorption Sheet Manufacturing Method 47. JP, 05-078379 A, Antibiotic, its production method, agricultural and horticultural fungicide containing it, and its producing bacteria 48. Special table 2008-506961 Device component and use of device component for detecting presence of specimen 49 Special table 2007-535615 New Kate Yellow-Green Phosphor 50. Special Table 2007-532882 Mass Spectrometry of Antibody Conjugates 51. Special Table 2007-532683 Antiparasitic Drugs and Methods for Treating, Preventing and Inhibiting Ectoparasites in Animals 52. Special Table 2006-511513 Antiarrhythmic compounds from king cobra venom and their purification methods 53. Special table 2005-536625 Methods and compounds for controlling the morphology and shrinkage of polyol-modified silane-derived silica 54. Special table 2005-528466 Various emission intensities and Luminescent spherical non-autofluorescent silica gel with frequency 55. Special Table 2005-526053 Water-soluble extraction of plant species to promote immunity, anti-inflammatory, anti-tumor and DNA repair processes of warm-blooded animals Isolation, purification, and structural identification of biologically active components of products 56. JP 2005-525554 Polyelectrolyte complexes (for example, amphoteric ions) having receptors (for example, polynucleotides, antibodies, etc.) for biosensor applications 57. Special Table 2005-516595 Heteroconformation Polynucleotides and Methods of Use 58. Special Table 2004-510167 Devices for Detecting Ionizing Radiation Using Layers of Fluorescent Substances 59. Special Table 2003-511358 One or more 60. Special Table 2003-511059 Template-Dependent Ligation Using PNA-DNA Chimeric Probe 61. Special Table 2003-511045 Identification Method of RNA Binding Compound 62. Special Table 2003-507024 PNA -Polymerase extension at the 3 'end of a DNA chimera 63. Special table 2002-537401 Methods and compositions for the synthesis of labeled oligonucleotides and analogs on solid supports 64. Special table 2002-529682 Measuring concentrations of substances System 65. Special table 2002-503454 Quantification method of tumor cells in body fluid and test kit suitable for it 66. Special table 2000-512126 One for quantifying tumor cells in body fluid 67. Special Table 2000-511880 Calicspirol, Calixpyridinopyrrole and Calixpyridine 68. Special Table 2000-500740 Solution Phase Synthesis Method of Oligonucleotides 69. Special Table 11-505923 Analyte Method for producing high-sensitivity single-layer system for concentration measurement, and system formed by this method 70. Tokuhei Hei 11-504316 Agents that bind to progressive glycosylation end products and methods for their use 71. Tokuhei Hei 10-502614 Tags 72. Special Table 09-511486 Synthetic Receptors, Libraries and Their Use 73. Special Table 08-506175 Combinatorial Chemistry Library Encoded by the Tag 74. Special Table 08-504851 Oxygen scavenger not related to transition metal catalysts 75. Re-Table 01/011364 Automatic labeling method using dispenser, automatic target substance selection method, salt Sequencing method and automatic dispensing system 76. Patent 4009722 Inorganic molded body decorated with nanoparticles and its manufacturing method 77. Patent 3881883 Organohalide treatment facility monitoring system 78. Patent 3858083 Diphenylanthracene measuring method 79. Patent 3830968 Ana Method for producing high-sensitivity single-layer system for light concentration measurement and system formed by this method 80. Patent 3789817 Template-dependent ligation using PNA-DNA chimera probe 81. Patent 3190554 Fluorescent material based on manganese-doped zinc silicate And its production method 82. Patent 3154375 Antibacterial complex and its production method 83. Patent 3115324 Nucleic acid isolating apparatus and method 84. Patent 28901401 Amatcha-derived antimutagenic agent 85. Patent 2518637 Amino acid for amino acid analysis Fluorescent derivative mixtures and amino for amino acid analysis Method for producing fluorescent derivative mixture and method for using amino acid fluorescent derivative mixture for amino acid analysis 86. Japanese Patent Publication No. 08-007215 Antigen and / or antibody detection method and test kit for detection 87. Japanese Patent Publication No. 06-086389 UV-induced mutagenesis agent 88. Japanese Patent Publication 06-082100 Optical sensor and its manufacturing method 89. Japanese Patent Publication 05-067610 90. Japanese Patent Publication 05-065490 91. Japanese Patent Publication 05-036062 92. Japanese Patent Publication 03-024984 93. Kaisho 62-018955 94. Mituto 3120556 Mixed light-emitting diode structure

Regarding the application to edgelight, the following 28 prior arts were searched at the JPO Digital Library. However, this application does not conflict with: 1. Utility model 63-082222 withdrawal 2. JP-A-7-76794 Fluorescence on either plate (no assessment) JP-A-7-056163 Withdrawal Directly fluorescent JP, 5-346510, withdrawal Sharp edge Fluorescence Japanese Patent Laid-Open No. 5-289074 Taking off Sony Edge Fluorescence Japanese Patent Laid-Open No. 3-231792 Takedown Seiko Edge Fluorescence JP 54-092345 Withdrawal Expired Seiko Edge Phosphorescence 8. JP, 52-020796, withdrawal withdrawal Casio taper edge fluorescence 9. JP-A 52-006496 Rejection Toshiba Edge Fluorescence Japanese Patent Publication No.7-118299 Registration Expired Edge Phosphorescence 11. 6-016901 No. 6 Takeuchi Murata Edge Back afterglow12. Utility model full sentence flat 1-146217 refusal Sanyo deflection plate Fluorescence13. JP-A-3-189627 (JP, A) 14. JP-A-2-3011 (JP, A) 15. JP-A-4-267215 (JP, A) 16. JP-A-7-176794 (JP, A) 17. JP-A-7-56163 (JP, A) 18. JP-A-5-346510 (JP, A) 19. JP-A-5-289074 (JP, A) 20. JP-A-3-2317892 (JP, A) 21. JP-A-54-92345 (JP, A) 22. JP-A 52-20796 (JP, A) 23. JP, 52-6496 (JP, A) 24. Shokai Sho 63-82222 (JP, U) 25. Hei 6-16901 (JP, U) 26. Hei 1-146217 (JP, U) 27. Japanese Patent Publication No. Hei 7-118299 (JP, B2) 28. Patent registration No. 3196870

As described above, the present invention has two major effects of disaster prevention / security and energy saving, and is extremely useful in industry.
The present invention is configured as described above, and since all the means can be realized by using known means, it is obvious that the structure of the present invention is completed.
In addition, the present invention is not limited to the above-described embodiments, the main text, and the claims by the principle of equality, and it goes without saying that various modifications and derived examples can be made without changing the gist. There is no.

(a) shows the structural formula of the fluorescent silica gel used in the present invention. A phosphorescent ceramic powder (not shown) is dispersed in the silica gel. (b) shows the fluorescence emission characteristics of the silica gel emitting fluorescence used in the present invention. It is sectional drawing which shows one powder of the silica gel of this invention, and several of the powders of luminous ceramics are disperse | distributing in the silica gel. Sectional drawing in which incident light is scattered and stored in one powder of the silica gel of the present invention and the silica gel generates fluorescence is shown. Sectional drawing which shows the some powder of the silica gel of this invention. The silica gel powder is connected by a binder. Sectional drawing which shows two or more of the luminous resin pellets of this invention. The phosphorescent resin pellets are connected by a binder. Sectional drawing which accommodated the powder of the luminous resin pellet of this invention or the several powder of the silica gel in the transparent case is shown. Each phosphorescent resin pellet or powder may be connected using a binder, or a binder may not be used. Further, in the case of the luminous resin pellets, they may be heated and pressurized to be thermally fused to each other. Sectional drawing which shows the edge light which is one Example of this invention. (a) is sectional drawing which shows the edge light which is another Example of this invention. (b) is a plan view thereof. The sketch which shows one of the phosphorescent resin pellet of this invention which disperse | distributed phosphorescent ceramic in transparent resin. Sectional drawing which shows the Example which arrange | positioned the phosphorescent pellet or phosphorescent silica gel of this invention in the side part of LED by the planar light source of this invention, and did not attenuate the direct light from LED, and also stored the light. (a) is sectional drawing which shows the Example which has arrange | positioned the phosphorescent resin pellet or phosphorescent silica gel powder of this invention on the inner surface of a parabolic mirror or a concave mirror. (b) is sectional drawing which shows the Example which hold | maintained and arrange | positioned the luminous resin pellet of this invention or the luminous silica gel powder in the transparent case on the inner surface of a parabolic mirror or a concave mirror. (a) is a sketch showing a metal or glass rail having a V-shaped cross section. (B) The sketch which filled the phosphorescent material in the opening part of the metal or glass rail with a V-shaped cross section. A sketch showing the positional relationship between the LED substrate used for straight tube LEDs and the V-shaped metal or glass rail filled with phosphorescent material. (a) is a cross-sectional view of a metal or glass rail having a U-shaped cross section. (b) is a sectional view of a metal or glass rail having a semi-elliptical section. The sketch which shows the light guide plate and LED for edge light used instead of the straight tube | pipe type LED board 1301 and LED1302.

Explanation of symbols

Si: Silicon atom
O: oxygen atom
C: carbon atom hν; photon

201; phosphorescent ceramic powder 202; silica gel portion 301; phosphorescent ceramic powder 302; silica gel portion 303; light 401 incident from the outside; phosphorescent ceramic powder 402; silica gel portion 404; binder portion 501; Transparent resin portion 504; binder portion 505; one of phosphorescent resin pellets 601; phosphorescent ceramic powder 602; transparent resin portion 603; silica gel portion 604; transparent case top surface 605; transparent case back surface 701; LED
702; light guide plate 703; luminous layer 705; edge reflection layer 706; diffuser plate 801; LED
802; light guide plate 803; phosphorescent layer 804; reflector 805; edge reflector layer 806; diffuser plate 901; phosphorescent ceramic powder 902; transparent resin portion 903; one phosphorescent resin pellet 1001;
1003; phosphorescent resin pellet or phosphorescent silica gel powder 1004; LED substrate 1101; LED
1102; Cross section 1103 of transparent resin case; Phosphorescent resin pellet or phosphorescent silica gel 1104; Cross section 1201 of parabolic mirror or concave mirror; Metal or glass rail 1202; Metal or glass rail opening 1203; Material 1301; LED substrate 1302; LED
1303; metal or glass rail 1304; metal or glass rail opening 1401; U-shaped rail cross section 1402; U-shaped rail opening 1403; semi-elliptical metal or glass rail 1404; half Metal or glass rail opening 1501 having an elliptical cross section; light guide plate 1502; LED or other light emitter 1503 of edge light; surface emitting light on the surface of the light guide plate

Claims (14)

In the gel viscous material obtained by gelling alcoholic silica sol,
A phosphorescent ceramic powder whose structural formula is SrAl ₂ O ₄ : Eu, Dy, or whose structural formula is Sr ₄ Al ₁₄ O ₂₅ : Eu, Dy,
Or its structural formula is SrO _. AAl ₂ O ₃ bSiO ₂ : cL, fX
(L is a mineral agent, alkali halide and / or ammonium halide salt and / or ammonium phosphate, X is Eu or Dy, a, b, c, f are constants)
When adding 1 to 15 Vol% of the phosphorescent ceramic powder shown in (1) to the volume of the dry silica gel and dispersing it, and heating the gel viscous material obtained by gelling the alcoholic silica sol,
The silica gel particles are characterized by heating the gel at a temperature below the range in which divalent Eu is not oxidized to become trivalent Eu, shrinking the gel, and evaporating alcohol components and moisture to form dry silica gel. A phosphorescent silica gel phosphor in which the phosphorescent ceramic is dispersed in an amount of 1 to 15 Vol%. In the gel viscous material obtained by gelling aqueous silica sol,
A phosphorescent ceramic powder whose structural formula is Sr ₂ MgSi ₂ O ₇ : Eu, Dy or a phosphorescent ceramic powder whose structural formula is Sr ₄ Al ₁₄ O ₂₅ : Eu, Dy or a structural formula thereof is m (Sr _{1 -a · Aa) O · n (} Mg 1-b · J b) O · 2 (Si 1-c · Ge C) O 2: Eux, Lny
(A is Ca or Ba, J is Be or Zn or Cd, Ln is Dy or La, a, b, c, m, n, x, y are constants) or a structural formula thereof Is (M · Eu) Al ₂ O ₄ · (M · Eu) O · n (Al _1-ab · B _b · Q _a ) ₂ · O ₄
(M is Sr, Ca or Mg, Q is Dy, a and b are constants) 1 to 15 Vol% of the dry silica gel volume is added and dispersed to gel the aqueous silica sol When heating the gel viscosity, the gel is heated at a temperature below the range where divalent Eu is not oxidized to become trivalent Eu to shrink the gel and evaporate the moisture to form dry silica gel. A phosphorescent silica gel phosphor in which the phosphorescent ceramic is dispersed in silica gel particles by 1 to 15 Vol%. When heating the gel viscous material at a temperature below the range in which divalent Eu is not oxidized to become trivalent Eu in claim 1 to claim 2, when heating in air, the gel is heated at a temperature of 400 ° C or lower. A phosphorescent silica gel phosphor characterized in that: When heating the gel viscous body at a temperature below the range in which divalent Eu is not oxidized to become trivalent Eu in claim 1 to claim 2, when heating in nitrogen, heat at a temperature of 800 ° C or lower. A phosphorescent silica gel phosphor characterized in that: In claim 1 to claim 2, when the gel viscous body is heated at a temperature below the range where divalent Eu is not oxidized to become trivalent Eu, the hydrogen content of the alcohol added to the silica sol is below the temperature at which it remains. A phosphorescent silica gel phosphor characterized in that, by heating, hydrogen remains in the contracted silica gel so that divalent Eu is not oxidized to trivalent by the reducing power of the remaining hydrogen. In Claim 1-5, it made using the luminous silica gel particles in which luminous ceramic was dispersed inside silica gel,

(a)
The phosphorescent silica gel particles are arranged in a sheet shape, and the phosphorescent silica gel particles are connected by a transparent resin binder, or
(b)
A block-shaped phosphorescent body in which a rectangular parallelepiped transparent container is filled with the phosphorescent silica gel particles, or
(c)
A block-shaped phosphor in which a rectangular parallelepiped transparent container is filled with the phosphorescent silica gel particles and the phosphorescent silica gel particles are connected with a transparent resin binder, or
(d)
A parabolic mirror or concave mirror-like phosphorescent body in which the phosphorescent silica gel particles are arranged on the mirror surface of a parabolic mirror or concave mirror, and the phosphorescent silica gel particles are connected by a transparent resin binder, or
(e)
A phosphorescent material in which a transparent resin piece, a transparent ceramic piece, a transparent resin bead, or a transparent ceramic bead is mixed with the phosphorescent silica gel particles shown in (a) to (d),
A phosphorescent material characterized by having one of the structures. A phosphorescent resin pellet obtained by kneading the phosphorescent ceramic powder having the structural formula shown in claim 1 or 2 and a resin pellet such as acrylic or polycarbonate using an extruder and dispersing 1 to 15 Vol% phosphorescent material powder. The resulting phosphorescent resin pellet is a rectangular parallelepiped phosphorescent resin pellet with one side of 0.5 mm to 6 mm or an elliptical circle with a major axis of 0.5 mm to 6 mm and a height of 0.5 mm to 6 mm. Made using columnar luminous resin pellets,

(a) A sheet-shaped phosphor that arranges the phosphorescent resin pellets in a sheet shape and connects the phosphorescent resin pellets with a transparent resin binder, or
(b) A sheet-shaped phosphor that arranges the phosphorescent resin pellets in a sheet shape, heats and heat-seals the phosphorescent resin pellets, or
(c) a block-shaped luminous body filled with the luminous resin pellets in a rectangular parallelepiped transparent container, or
(d) A block-shaped phosphorescent body in which the phosphorescent resin pellets are filled into a rectangular parallelepiped transparent container and the phosphorescent resin pellets are connected with a transparent resin binder, or
(e) a parabolic mirror or concave mirror-shaped phosphorescent body in which the phosphorescent resin pellets are arranged on the mirror surface of a parabolic mirror or concave mirror, and the phosphorescent resin pellets are connected by a transparent resin binder, or
(f) a parabolic mirror or a concave mirror-shaped phosphor, in which the phosphorescent resin pellets are arranged on a mirror surface of a parabolic mirror or a concave mirror and heated to thermally fuse the phosphorescent resin pellets;
(g) a phosphorescent material obtained by mixing a transparent resin piece, a transparent ceramic piece, a transparent resin bead, or a transparent ceramic bead with the luminous resin pellet shown in (a) to (f),
A phosphorescent material characterized by having one of the structures. A phosphorescent silica gel particle in which a phosphorescent ceramic is dispersed, a phosphorescent paint in which the phosphorescent silica gel particles are dispersed, or a sheet-like phosphor, which is manufactured by the method described in claim 1. Or the manufacturing method which manufactures a block-shaped luminous body and the said luminous body. A phosphorescent resin pellet in which a phosphorescent ceramic is dispersed, and a phosphorescent coating material in which the phosphorescent resin pellet is dispersed, or a sheet-like phosphor or block-like shape, which is manufactured by the method described in claim 7 A phosphorescent body and a method for producing the phosphorescent body. In claims 1 to 7,
(a)
Edge light guide plate with reflective dots printed on the back of the transparent resin plate, or
(b)
A light guide plate for edge light provided with a reflection groove on the back surface of the transparent resin plate, or
(c)
A light guide plate for edge light in which fine particles for reflection are dispersed inside a transparent resin plate, or
(d)
A light guide plate for edge light whose thickness decreases as the distance from the edge light source increases.
The edge light guide plate is disposed using at least a part of the back surface of the edge light guide plate, and the phosphor layer shown in claim 1 is disposed on at least a part of the back surface of the edge light guide plate. The light storage layer has a laminated structure of two layers, and light from the edge light is reflected inside the light guide plate for edge light and emitted to the surface of the light guide plate for edge light, Part of the reflected light is incident on the phosphor layer disposed on the back surface of the light guide plate for edge light, excites the phosphor of the phosphor layer, accumulates part of the light energy, and 8. The edge light using the phosphor layer according to claim 1, wherein the portion is radiated to a front surface and a back surface of the edge light guide plate. 9. In claims 1 to 7,
(a) A light guide plate for edge light having reflective dots printed on the back surface of a transparent resin plate, or
(b) a light guide plate for edge light provided with a reflection groove on the back surface of the transparent resin plate, or
(c) Edgelight light guide plate in which reflective fine particles are dispersed inside a transparent resin plate, or (d) Edge light light guide plate whose thickness decreases with increasing distance from the edge light source. A light guide plate is used, the phosphor layer shown in claim 1 to 7 is disposed on at least a part of the rear surface of the light guide plate for edge light, and a reflector is provided on the back surface of the phosphor layer, The edge light guide plate, the phosphorescent material layer, and the reflector plate have a three-layered structure, and the light from the edge light is reflected inside the edge light guide plate and the edge light. A part of the light radiated to the surface of the light guide plate for light and reflected on the other side is incident on the light storage layer disposed on the back surface of the light guide plate for edge light, and excites the light storage body of the light storage layer, and a part of the light energy A part of the stored light The other part of the light emitted and stored on the surface of the edge light guide plate is retroreflected by the reflector disposed on the back surface of the phosphor layer and is emitted toward the surface of the edge light guide plate. An edge light using the phosphor layer according to any one of claims 1 to 7. 3. The phosphor according to claim 1, wherein the phosphorescent silica gel is confined in a form in which a carbon compound is substituted with silicon atoms (Si) of the silica gel skeleton in the silica gel network. Using a metal or glass rail having a V-shaped, U-shaped, semi-circular or semi-elliptical cross section, the luminous silica gel particles shown in claim 1 and claim 2 are filled in the opening of the rail, and the luminous properties are increased. A phosphorescent material characterized in that silica gel particles are connected to each other using a transparent resin binder. Using a metal or glass rail having a V-shaped or U-shaped or semi-circular or semi-elliptical cross section, the luminous resin pellets shown in claim 7 are filled in the opening of the rail, and the luminous resin pellets are A phosphorescent body characterized in that the phosphorescent resin pellets are connected by using a transparent resin binder, or the phosphorescent resin pellets are heated, and the phosphorescent resin pellets are thermally fused together.

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