JP5377543B2 - COLOR CONVERSION SHEET, MANUFACTURING METHOD THEREOF, AND LIGHT EMITTING DIODE LIGHTING APPARATUS USING THE SAME - Google Patents

Description

  The present invention relates to a color conversion sheet having a fluorescent part that changes a light emission color by changing a light emission wavelength emitted from a light emitting diode (hereinafter referred to as an LED), a manufacturing method thereof, and a light emitting diode lighting apparatus using the color conversion sheet. is there.

  An LED is a crystal having a PN bond. When a voltage is applied in the forward direction, an electron injected into the conduction band and a hole formed in the valence band recombine across the band gap. To emit. Because of this light emission principle, the emission color of the LED is a single color. Therefore, when the LED is used for illumination, a phosphor is disposed on the surface of the LED that emits blue light to make it white. However, since the manufacturing variation of the LED causes the variation of the emission wavelength, it is necessary to arrange the fluorescent member on the LED mounting substrate so as to be positioned in the light emission path of the LED, and to finely adjust the color and change the color temperature. .

  In view of such a situation, a translucent covering member containing a phosphor substance is bonded to the surface of the sheet base material so as to cover the opening formed in the sheet base material. There has been proposed a light-emitting device mounted on an LED mounting substrate so that the conductive covering member faces the LED (for example, see Patent Document 1). And in patent document 1, the said color conversion sheet | seat forms the opening corresponding to LED in a sheet | seat base material, and welds it to the surface of a sheet | seat base material so that the transparent coating | coated member formed larger than the opening may be covered. Alternatively, the translucent coating member formed in a predetermined shape is placed in a mold, and when the sheet base material is molded, the translucent coating member is vulcanized and adhered to the sheet base material. Was manufactured.

JP 2000-323756 A

  In patent document 1, since the translucent coating | coated member produced in the predetermined shape is joined to the sheet | seat base material, while the preparation process of a translucent coating | coated member is needed separately, the translucency for the number of LED is required. The joining process of the coating | coated member was needed and there existed a subject that the mass productivity of a color conversion sheet fell. Moreover, since the translucent covering member is bonded to the surface of the sheet base material, the translucent covering member protrudes from the surface of the sheet base material, and the color conversion sheet is packed, stored, transported, and attached to the LED mounting substrate. In some cases, the surface of the translucent covering member is damaged or contaminated, resulting in a problem that the optical characteristics are deteriorated.

  This invention was made to solve such a problem, while suppressing the occurrence of damage and contamination of the fluorescent member surface at the time of mounting on the LED mounting substrate, it is possible to suppress a decrease in optical characteristics, It is an object to obtain a color conversion sheet excellent in mass productivity, a method for producing the same, and a light-emitting diode illuminator using the color conversion sheet.

The method for manufacturing a color conversion sheet according to the present invention is a method for manufacturing a color conversion sheet to be mounted on a light emitting diode mounting substrate on which a light emitting diode is mounted, and when the light emitting diode is mounted on the light emitting diode mounting substrate, A step of forming an opening opposite to the substrate, a step of attaching a flat closing plate to one surface of the substrate so as to close the opening, and a liquid silicone resin in which a phosphor is dispersed in the opening. A step of filling; a step of leveling the liquid silicone resin filled in the opening; and curing the leveled liquid silicone resin so that one surface is a flat surface flush with one surface of the substrate; and the other surface is provided with a step of preparing a fluorescent member which is constituted by the lower surface of the concave meniscus located in the opening, a step of peeling the塞口plate from the substrate, the That.

According to this invention, the liquid silicone resin in which the phosphor is dispersed is filled in the opening formed on the substrate and closed by the closing plate, and cured after the leveling to form the fluorescent member on the substrate. Therefore, it is not necessary to separately prepare the fluorescent members by the number of light emitting diodes, and the mass productivity of the color conversion sheet can be improved.
The color conversion sheet manufactured in this way is composed of a flat surface in which one surface of the fluorescent member is flush with one surface of the substrate, and the other surface is composed of the lower surface of the concave meniscus located in the opening. There is no protrusion of the member from the substrate, and damage or contamination of the surface of the fluorescent member can be suppressed when mounted on the light emitting diode mounting substrate, and a decrease in optical characteristics can be suppressed.

It is sectional drawing which shows typically the structure of the LED lighting fixture which concerns on Embodiment 1 of this invention. It is process sectional drawing explaining the manufacturing method of the color conversion sheet used for the LED lighting fixture which concerns on Embodiment 1 of this invention. It is process sectional drawing explaining the manufacturing method of the color conversion sheet used for the LED lighting fixture which concerns on Embodiment 2 of this invention.

  Hereinafter, preferred embodiments of a color conversion sheet, a manufacturing method thereof, and an LED lighting apparatus using the same according to the present invention will be described with reference to the drawings.

Embodiment 1 FIG.
1 is a cross-sectional view schematically showing a configuration of an LED lighting apparatus according to Embodiment 1 of the present invention.

  In FIG. 1, an LED lighting apparatus 1 includes an LED mounting board 2 on which an LED 3 is mounted, and a color conversion sheet 4 that is disposed on the LED mounting board 2 and performs fine adjustment of color development of the LED 3 and change of color temperature. And a reflector 10 disposed above the color conversion sheet 4 so as to be positioned above the LED 3 and reflecting light emitted from the LED 3 to distribute light in a predetermined direction.

The LED mounting substrate 2 is a printed wiring board on which a large number of LEDs 3 are mounted, for example, and is disposed in a housing (not shown). Then, the LED 3 is bonded and mounted to the electrode of the LED mounting substrate 2 by soldering or the like.
When the color conversion sheet 4 is disposed on the LED mounting substrate 2, the color conversion sheet 4 is composed of a substrate 5 having openings 6 facing the LEDs 3 and a silicone resin in which phosphors are dispersed. A hardened fluorescent member 7 and a removable adhesive layer 8 formed on the entire surface of one surface of the substrate 5 are provided. The fluorescent member 7 filled and cured in the opening 6 has a flat surface substantially flush with the removable adhesive layer 8 formed on one surface of the substrate 5, and the other surface is located in the opening 6. The concave meniscus has a lower surface. The color conversion sheet 4 is supported by a support base 9 protruding from the LED mounting substrate 2 and is disposed on the LED mounting substrate 2 so that the fluorescent member 7 faces the LED 3 in close proximity. 2 or attached to the housing.

  The reflector 10 has, for example, a mouth-opening cylindrical portion that faces each of the LEDs 3 and is made of a resin molded body that is mirror-finished with aluminum or the like. And the reflector 10 is arrange | positioned on the color conversion sheet | seat 4 so that the opening 6 may be located in a cylinder part, and is attached to the LED mounting board 2 or a housing | casing. In place of the reflector 10, an optical member such as a lens may be used.

  The LED lighting apparatus 1 configured in this way is installed on the ceiling of a living space, for example. Then, the light emitted from the LED 3 passes through the fluorescent member 7, is distributed in a predetermined direction by the reflector 10, and is irradiated to the living space. At this time, the light emitted from the LED 3 is finely adjusted to a predetermined color by the fluorescent member 7 or changed to a predetermined color temperature.

According to the first embodiment, the fluorescent member 7 filled and cured in the opening 6 is configured as a flat surface having one surface substantially flush with one surface of the substrate 5 and the other surface positioned in the opening 6. Since the lower surface of the meniscus is used, the fluorescent member 7 does not protrude from the surface of the substrate 5. Therefore, when the color conversion sheet 4 is packed, stored, transported, or attached to the LED mounting substrate 2, the surface of the fluorescent member 7 is less likely to be damaged or contaminated, and a decrease in optical characteristics can be suppressed.
Since the fluorescent member 7 is made of a silicone resin in which a phosphor is dispersed, the occurrence of discoloration due to heat and light emitted from the LED 3 is suppressed, and stable optical characteristics can be obtained over a long period of time.

  Since the removable adhesive layer 8 is formed on one surface of the substrate 5, when the color conversion sheet 4 is attached to the LED mounting substrate 2, the removable adhesive layer 8 adheres to the support pedestal 9 and color conversion is performed. The sheet 4 can be temporarily fixed. Therefore, the color conversion sheet 4 can be easily positioned so that the fluorescent member 7 faces the LED 3, and the assemblability of the LED lighting device 1 is improved. In particular, when changing the color temperature of the LED lighting apparatus 1 installed on the ceiling, the color conversion sheet 4 can be temporarily fixed to the LED mounting board 2 with the LED 3 mounting surface facing downward. Workability of change work is improved. Furthermore, since the positional accuracy of the opening 6 with respect to the LED 3 is improved, it is not necessary to design the size of the opening 6 in anticipation of the positional shift, and the filling amount of the fluorescent member 7 into the opening 6 can be reduced. Therefore, the consumption of expensive phosphors dispersed in the fluorescent member 7 is reduced, and the cost can be reduced.

Since the color conversion sheet 4 can be disposed close to the LED mounting substrate 2, the opening area of the opening 6 can be reduced, and the filling amount of the fluorescent member 7 into the opening 6 can be reduced. Therefore, the consumption of expensive phosphors dispersed in the fluorescent member 7 is reduced, and the cost can be reduced.
Since the reflector 10 is disposed on the LED mounting substrate 2 via the color conversion sheet 4, the reflector 10 is less susceptible to heat and light emitted from the LED 3. Therefore, a resin molded body can be used as the reflector 10 and the cost can be reduced. Further, even if a resin optical component is used in place of the reflector 10, it is difficult to cause discoloration due to thermal degradation or photolysis of the optical component, so there is no need to use an inorganic transparent material such as transparent glass as the optical component. Cost reduction is achieved.

  Next, a method for manufacturing the color conversion sheet 4 will be described with reference to FIG. FIG. 2 is a process cross-sectional view illustrating a method for manufacturing a color conversion sheet used in the LED lighting apparatus according to Embodiment 1 of the present invention.

  First, as shown in FIG. 2A, the removable adhesive layer 8 is formed on the entire surface of one surface of the substrate 5 whose both surfaces are flat. Next, as shown in FIG. 2B, the opening 6 is formed in the substrate 5 by press molding. Here, the opening 6 is formed in the substrate 5 in a positional relationship facing each of the LEDs 3 mounted on the LED mounting substrate 2. Next, as shown in FIG. 2C, the flat closing plate 11 is bonded to one surface of the substrate 5 by the removable adhesive layer 8. Next, the liquid silicone resin 12 in which the phosphor is dispersed is filled in the opening 6 closed by the closing plate 11 and leveled. Thereby, the liquid silicone resin 12 becomes a concave meniscus, as shown in FIG. After the leveling, the silicone resin 12 is cured as shown in FIG. Next, the closing plate 11 is peeled from the substrate 5, and the color conversion sheet 4 in which the opening 6 is filled with the fluorescent member 7 is obtained as shown in FIG.

  According to this manufacturing method, the openings 6 corresponding to the number of the LEDs 3 are press-molded on the substrate 5, the liquid silicone resin 12 in which the phosphor is dispersed is filled and cured in each opening 6, and the fluorescent member 7 is the LED 3. Since the color conversion sheets 4 arranged so as to face each other are manufactured, it is not necessary to separately prepare the fluorescent member 7, and the mass productivity is improved. That is, a process required when separately manufacturing the fluorescent member 7, for example, a process of manufacturing the fluorescent members 7 for the number of LEDs 3, a process of applying an adhesive for bonding the fluorescent member 7 to the substrate 5, and The step of arranging and bonding the fluorescent member 7 to the substrate 5 can be omitted. If there is an appropriate etching solution, the openings 6 may be formed by partially etching the substrate 5 using the etching solution instead of press forming.

The openings 6 corresponding to the number of LEDs 3 are press-molded on the substrate 5, the liquid silicone resin 12 in which the phosphor is dispersed is filled in each opening 6, and the liquid silicone resin 12 is cured after leveling. Therefore, the color conversion sheet 4 having a fluorescent member 7 in which one surface is formed by a flat surface substantially flush with one surface of the substrate 5 and the other surface is formed by a lower surface of a concave meniscus positioned in the opening 6 can be simply obtained. Can be manufactured. Moreover, the uniformity of the thickness of the cured silicone resin 12, that is, the fluorescent member 7, can be ensured, and variations in the color temperature of the LED 3 are suppressed.
Prior to press forming the opening 6 on the substrate 5, the removable adhesive layer 8 is formed on one surface of the substrate 5, so that the releasable adhesive layer 8 is prevented from protruding into the opening 6.

Here, the press molding means that the opening 6 is punched into the substrate 5 by a press machine using a Thomson blade or a mold.
The material of the substrate 5 is not particularly limited as long as the substrate 5 can support the fluorescent member 7 and has rigidity to ensure handling. In particular, a resin or metal sheet material is preferable because it is excellent in work moldability, and further, if it has heat resistance that can withstand the heat generated from the LED 3. For example, resin sheets such as polyethylene terephthalate, polyacrylic, polyamide, ABS resin, AS resin, phenol resin, and epoxy resin, and fiber reinforced resin sheets that are fiber reinforced with these resins have high density polar groups, so silicone While being able to ensure adhesiveness with the resin, it is preferable because it is excellent in work moldability. Also preferred are metals such as copper, stainless steel, and aluminum.
The closing plate 11 only needs to have a smooth surface, and the material is not particularly limited. In particular, resin sheets such as polystyrene, polycarbonate, polyacetal, and polytetrafluoroethylene are preferable because they do not have a high density of polar groups and thus have high releasability from a silicone resin.

  The removable adhesive layer 8 is formed on one surface of the substrate 5, but may be formed on the surface of the closing plate 11. In this case, the removable adhesive layer 8 is not formed at a site corresponding to the opening 6 on the surface of the closing plate 11. Further, the releasable adhesive layer 8 is formed in an annular shape without being interrupted at a portion corresponding to the edge of the opening 6 on the surface of the closing plate 11 so that the liquid silicone resin 12 filled in the opening 6 does not leak. Need to be formed.

  The releasable adhesive layer 8 needs an adhesive force (adhesive force) that prevents the liquid silicone resin 12 from leaking out when the liquid silicone resin 12 is leveled and cured. In particular, when the liquid silicone resin 12 is cured at a high temperature, a force for peeling the closing plate 11 from the substrate 5 due to the difference in thermal expansion coefficient between the substrate 5 and the closing plate 11 is generated. Adhesive strength against the peeling force is required. However, if the adhesive force is excessively large, the substrate 5 is deformed when the closing plate 11 is peeled off from the substrate 5 after the silicone resin 12 is cured. Therefore, it is not preferable to increase the adhesive force excessively. Furthermore, the adhesive force with the substrate 5 is made larger than the adhesive force with the closing plate 11 so that the removable adhesive layer 8 remains on the substrate 5 when the closing plate 11 is peeled off. It is preferable. Therefore, for example, a urethane-based adhesive, an acrylic-based adhesive, and a silicone-based adhesive are used as the removable adhesive layer 8, and the substrate 5, the closing plate 11, and the silicone resin 12 are considered in consideration of the above-described conditions. Depending on the material, the adhesive strength is appropriately adjusted.

  The liquid silicone resin 12 is required to have a viscosity capable of dispersing the phosphor powder and leveling. The leveling property is related to the uniformity of the thickness of the fluorescent member 7 and is an important factor. However, since the liquid resin having a high leveling property has a low surface tension, the spinnability is generally high. As a result, as a filling method, a stencil printing method such as screen printing is not suitable, and a filling method using a dispenser (liquid dispensing apparatus) is preferable. Compared with other filling methods, the filling method using the dispenser reduces the waste of the liquid resin, and a very high quantitative filling is possible only by confirming the discharge amount for each dispenser nozzle. As a result, consumption of expensive phosphors is reduced, cost reduction is achieved, and variation in the thickness of the fluorescent member 7 can be suppressed as much as possible.

In addition, in the filling method using the dispenser, it is preferable to fill the liquid silicone resin 12 in the opening 6 while moving the tip of the dispenser nozzle two-dimensionally uniformly in the opening 6 as viewed from above the opening 6. Thereby, even if the cross-sectional area (width) of the opening 6 becomes large, the liquid silicone resin 12 is evenly filled in the opening 6 and is easy to level.
Further, when a dispenser having a plurality of nozzles is used, mass productivity is improved. In this case, when the liquid silicone resin 12 is filled into one opening 6 from a plurality of nozzles, the liquid silicone resin 12 is filled in the opening 6 in a wet and spread state in advance. Even easier to level. However, since the discharge amount is different for each nozzle, it is not preferable to simultaneously fill the liquid silicone resin 12 into the different openings 6 from each of the plurality of nozzles, because the thickness of the fluorescent member 7 varies.

  The leveling ease of the liquid silicone resin 12 depends on the viscosity of the liquid silicone resin 12, the width of the opening 6, the surface energy of the closing plate 11, the surface tension of the liquid silicone resin 12, and the filling amount. . The surface energy of the closing plate 11 and the surface tension and filling amount of the liquid silicone resin 12 are factors that determine wetting and spreading. However, since the surface tension of the liquid silicone resin 12 is extremely small, if a general material is selected for the closing plate 11 and the liquid silicone resin 12 and an appropriate filling amount is selected, the liquid silicone resin 12 always spreads wet. The time for wet spreading, that is, the time until leveling depends on the viscosity of the liquid silicone resin 12 and the size of the opening 6. Therefore, when the liquid silicone resin 12 is filled in the opening 6 while the tip of the dispenser nozzle is uniformly moved two-dimensionally in the opening 6 as viewed from above the opening 6, the liquid silicone resin before leveling is filled. Since 12 is filled relatively evenly in the opening 6, the leveling property is not significantly affected by the width of the opening 6. From this, it is considered that the viscosity of the liquid silicone resin 12 has the most influence on the leveling property.

Here, three types of color conversion sheets 4 were prepared using three types of closing plates 11 made of polycarbonate resin, polyethylene terephthalate resin, and electrolytically degreased stainless steel, respectively, with the sectional area of the opening 6 being 30 mm ^2. did. Then, the liquid silicone resin 12 was filled into the openings 6 of the three types of color conversion sheets 4 using a dispenser and allowed to stand at room temperature, and the wet state of the liquid silicone resin 12 and variations in thickness after curing were observed.

  When the viscosity of the liquid silicone resin 12 is 2.5 Pa · s or less at room temperature, the liquid silicone resin 12 wets and spreads over the entire opening 6 in any type of color conversion sheet 4, and the cured fluorescent member 7 The variation in thickness was within 10%. Further, when the viscosity of the liquid silicone resin 12 exceeded 3.0 Pa · s at room temperature, the liquid silicone resin 12 gelled before the entire opening 6 was wet spread in any type of color conversion sheet 4. Therefore, the viscosity of the liquid silicone resin 12 is preferably adjusted to 2.5 Pa · s or less at room temperature.

  Since the specific gravity of the phosphor is higher than that of the liquid silicone resin 12, if the viscosity of the liquid silicone resin 12 is too low, the phosphor tends to precipitate in the syringe of the dispenser, causing a problem in dispersibility. The degree of degradation of dispersibility changes depending on the time the liquid silicone resin 12 is left in the syringe, etc., but as a result of observing the degree of degradation of dispersibility, it is confirmed that there is no problem if it is 0.8 Pa · s or more. did it.

  Therefore, the viscosity of the liquid silicone resin 12 is preferably adjusted to 0.8 Ps · s or more and 2.5 Pa · s or less at room temperature.

  The silicone resin in which the phosphor is dispersed needs to be in a liquid state, but like a millable type, it is solid at room temperature, and there are those that become liquid at high temperatures, but are filled using a dispenser. It is preferably liquid at room temperature. Further, an addition type liquid silicone resin which is a curing system which does not generate reaction by-products which cause bubbles and a decrease in transparency is preferable. Furthermore, those in which the phenyl group is contained in the side chain of the siloxane, and those having more phenyl groups than the methyl group are particularly preferable because they can expect a resonance stabilizing effect on radicals and have less discoloration due to thermal degradation.

  The phosphor dispersed in the liquid silicone resin 12 is preferably an inorganic oxide that is relatively excellent in heat resistance and weather resistance. For example, an aluminate, phosphate, or silicic acid containing rare earth elements. Salt or the like is used. The dispersion amount of the phosphor is appropriately set depending on the required color temperature and the thickness of the fluorescent member 7.

The liquid silicone resin 12 may be selected so that its curing temperature is not more than the maximum allowable temperature determined by the heat resistance temperature of the substrate 5, the releasable adhesive layer 8, and the closing plate 11.
When the liquid silicone resin 12 is cured by heating, it is necessary to consider the warpage of the substrate 5 and the closing plate 11. If the substrate 5 and the closing plate 11 are made of the same material, no warping will occur, but if they are different materials, warping will occur due to the difference in thermal expansion coefficient. Therefore, the material of the substrate 5 and the closing plate 11 may be selected so that one bending rigidity is sufficiently larger than the other bending rigidity. That is, the substrate 5 and the closing plate 11 after heat curing of the liquid silicone resin 12 are smaller than the allowable warpage amount determined from the allowable thickness variation of the fluorescent member 7 and the width of the opening 6. 5 and the material of the closing plate 11 may be selected.

Embodiment 2. FIG.
FIG. 3 is a process cross-sectional view illustrating a method for manufacturing a color conversion sheet used in an LED lighting apparatus according to Embodiment 2 of the present invention.

A method for manufacturing a color conversion sheet according to the second embodiment will be described with reference to FIG.
First, as shown in FIG. 3A, two laminates 13 are bonded together with an adhesive 15 to produce a laminate 14 as a substrate, and the releasable adhesive layer 8 is a laminate 14. It is formed on the entire surface of one side. Next, as shown in FIG. 3B, the opening 6 is formed in the laminate 14 by press molding. Here, the opening 6 is formed in the laminate 14 in a positional relationship facing each of the LEDs 3 mounted on the LED mounting substrate 2. Next, as shown in FIG. 3C, the flat closing plate 11 is bonded to one surface of the laminate 14 by the removable adhesive layer 8. Next, the liquid silicone resin 12 in which the phosphor is dispersed is filled in the opening 6 closed by the closing plate 11 and leveled. Thereby, the liquid silicone resin 12 becomes a concave meniscus, as shown in FIG. After the leveling, as shown in FIG. 3E, the silicone resin 12 is cured. Next, the closing plate 11 is peeled off from the substrate 5 to obtain a color conversion sheet 4A in which the opening 6 is filled with the fluorescent member 7 as shown in FIG.

  Also in the second embodiment, the openings 6 corresponding to the number of LEDs 3 are press-molded in the laminated body 14, the liquid silicone resin 12 in which the phosphor is dispersed is filled in each opening 6, cured after leveling, and cured. Since the color conversion sheet 4 in which the member 7 is disposed so as to face each of the LEDs 3 is manufactured, the same effects as those of the first embodiment can be obtained.

  According to the second embodiment, since the adhesive 15 is exposed on the inner wall surface of the opening 6, the fluorescent member 7 is bonded to the adhesive 15 with the inner wall surface of the opening 6. Is supported by the laminate 14 by the adhesive force between the two. Therefore, the support force of the fluorescent member 7 by the laminate 14 is increased, the occurrence of damage to the fluorescent member 7 when the closing plate 11 is peeled off can be suppressed, the yield can be increased, and the color conversion sheet 4A can be handled. The occurrence of damage to the fluorescent member 7 can be suppressed. Furthermore, since the material selection range of the laminated plate 13 is widened and a highly heat conductive material, for example, a metal material such as stainless steel, copper, or aluminum, can be used, the heat generated in the LED 3 is effectively dissipated, and the LED 3 The temperature rise of the LED 3 can be suppressed, the luminous efficiency of the LED 3 can be improved, and the life of the LED lighting device 1 can be extended.

  Further, when the pressure-sensitive adhesive 15 is liquid, that is, the ratio of the loss elastic modulus to the storage elastic modulus is 1 or more, the pressure-sensitive adhesive 15 wets and spreads on the inner wall surface of the opening 6 when the opening 6 is punched out by pressing. Thereby, the adhesive force between the fluorescent member 7 and the inner wall surface of the opening 6 is further increased, and the supporting force of the fluorescent member 7 by the laminate 14 can be increased. As the adhesive 15, for example, those mainly composed of polyacryl, silicone, and ethylene / vinyl acetate copolymer are used.

  DESCRIPTION OF SYMBOLS 1 Light emitting diode lighting fixture, 2 LED mounting board | substrate, 4,4A color conversion sheet | seat, 5 board | substrate, 6 opening, 7 Fluorescent member, 8 Removable adhesive layer, 11 Closure board, 12 Liquid silicone resin, 13 Laminate board , 14 Laminate (substrate), 15 Adhesive.

Claims (12)

A color conversion sheet mounted on a light emitting diode mounting substrate on which the light emitting diode is mounted,
A substrate having an opening formed in a portion facing the light emitting diode when mounted on the light emitting diode mounting substrate;
It is made of a cured silicone resin in which a phosphor is dispersed, and is disposed in the opening and supported by the substrate. One surface is a flat surface that is flush with one surface of the substrate, and the other surface is the opening. A fluorescent member composed of a lower surface of a concave meniscus located inside,
A color conversion sheet characterized by comprising:   The color conversion sheet according to claim 1, wherein the substrate is a laminate produced by bonding a plurality of laminates with an adhesive.   The color conversion sheet according to claim 1, wherein a removable adhesive layer is formed on one surface of the substrate.   The color conversion sheet according to any one of claims 1 to 3, wherein the liquid silicone resin is an addition type liquid silicone resin.   The color conversion sheet according to any one of claims 1 to 4, wherein the phosphor is an inorganic oxide. A method for producing a color conversion sheet to be mounted on a light emitting diode mounting substrate on which a light emitting diode is mounted,
Forming an opening in the substrate facing the light emitting diode when mounted on the light emitting diode mounting substrate;
Attaching a flat closing plate to one surface of the substrate so as to close the opening;
Filling the opening with a liquid silicone resin in which a phosphor is dispersed;
Leveling the liquid silicone resin filled in the opening;
The leveled liquid silicone resin is cured to produce a fluorescent member composed of a lower surface of a concave meniscus, one surface of which is flush with one surface of the substrate and the other surface is located in the opening. Process,
Peeling the closing plate from the substrate;
A method for producing a color conversion sheet, comprising:   The method for producing a color conversion sheet according to claim 6, wherein a removable adhesive layer is formed on one surface of the substrate prior to forming the opening in the substrate.   The method for producing a color conversion sheet according to claim 6 or 7, wherein the liquid silicone resin is filled in the opening using a dispenser.   The method for producing a color conversion sheet according to any one of claims 6 to 8, wherein the substrate is a laminate produced by bonding a plurality of laminates with an adhesive.   The method for producing a color conversion sheet according to any one of claims 6 to 9, wherein the liquid silicone resin is an addition-type liquid silicone resin.   The method for producing a color conversion sheet according to any one of claims 6 to 10, wherein the phosphor is an inorganic oxide. A light emitting diode mounting board on which the light emitting diode is mounted;
The color conversion sheet according to any one of claims 1 to 5, wherein the color conversion sheet is disposed on the light emitting diode mounting substrate so that the opening faces the light emitting diode.
Light-emitting diode illuminator with

Images