JP2012189926A - Light emitting device and light emitting sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light emitting device which has no restrictions with respect to the allowable light emission time and can be freely stuck anywhere.SOLUTION: A light emitting device 1 includes a self-luminous type light emitting part 12 and a light-transmissive cover part 13 covering the light emitting part 12. The light emitting part 12 includes a light emitting base and a radioactive material for supplying energy to the light emitting base, and an adhesive layer 14 and a protection sheet 15 are provided on the backside of the light emitting device 1.

Description

  The present invention relates to a light emitting device including a self-luminous light emitting unit, and a light emitting sheet.

  Conventionally, there is a demand for automatically lighting a desired place at night. One of products for such demands and applications is a light-emitting sheet having phosphorescent properties. Such a light emitting sheet is used by being attached to a desired place. Examples of prior art relating to such a light emitting sheet include, for example, the following Patent Documents 1 and 2, which extend the light emission time of a phosphorescent film used by being attached to a building or a passage, A technique for increasing the afterglow brightness is disclosed. Patent Document 3 proposes a light-emitting sheet used for a line-of-sight guidance sheet for a vehicle driver or the like, and a base sheet and a plurality of protrusions independently so as not to contact each other on the surface of the base sheet. A light emitting sheet comprising a light emitting portion provided is disclosed.

  Moreover, as a lighting fixture that illuminates a desired place when necessary, there is a so-called sensor-equipped light that automatically turns on when a human body is detected, as described in Non-Patent Document 1 below.

JP 2010-116522 A Japanese Patent Laid-Open No. 11-109864 JP 2001-092393 A

http://www.takex-eng.co.jp/en/products/item_contents/1448

  However, a product such as a light-emitting sheet having a phosphorescent property has a great limitation on the light emission possible time, and cannot be used in the first place unless it is in an outdoor environment where there is a time zone in which light can be stored. In addition, the lighting apparatus does not have such a problem as long as electric power is supplied, but it must be installed in a place where electric power can be supplied, and wiring is necessary and it takes a lot of work.

  Accordingly, an object of the present invention is to provide a safe light-emitting device and a light-emitting sheet that can be freely attached anywhere without any restriction on the light emission possible time.

  A light-emitting device according to the present invention includes a self-luminous light-emitting unit and a translucent cover that covers the light-emitting unit, and the light-emitting unit includes a light-emitting substrate and a radioactive substance that supplies energy to the light-emitting substrate. Contains.

  The light emitting unit may be formed on a substrate made of lead.

  The translucent cover part may be formed of a polymer.

  The translucent cover part is formed so that a hollow layer covers the light emitting part, and the hollow layer may be filled with water.

  On the back side of the light emitting device, an adhesive layer for adhering the device to the wall surface and a protective sheet for protecting the adhesive layer until use may be provided.

  The radioactive substance may contain tritium.

  The light-emitting sheet according to the present invention has a structure in which a plurality of the light-emitting devices are provided, and they are arranged in a plane.

  The light-emitting sheet may be composed of at least two types of light-emitting devices having different emission colors, and the plurality of types of light-emitting devices may be arranged in a mosaic so as to obtain a desired design.

  The light emitting sheet may have a cut groove formed between adjacent light emitting devices.

  Since the light-emitting device according to the present invention includes a self-luminous light-emitting portion, there is no limitation on the light-emission possible time, and it can always be used in a dark place.

  In the configuration in which the substrate is formed of lead, gamma rays and X-rays emitted from the light emitting unit can be blocked, so that safety is improved.

  In the structure in which the translucent cover part is formed of a flexible polymer, the light emitting device is not easily damaged.

  In the configuration where an adhesive layer for adhering to the wall surface and a protective sheet for protecting the adhesive layer until use are provided on the back side of the light emitting device, the light emitting device can be adhered to a desired location. Easy to use.

  In a configuration in which tritium is included in the light emitting portion, tritium emits only weak beta rays, so that the safety is high. Therefore, the translucent cover portion can be thinned to reduce the size of the device.

  Since the light-emitting sheet according to the present invention has a plurality of light-emitting devices connected in series, a large number of light-emitting devices can be attached to the wall surface in a single operation. Therefore, it is possible to reduce the labor compared to attaching the light emitting devices one by one.

  If the light-emitting sheet is composed of at least two types of light-emitting devices with different light emission colors and these light-emitting devices are arranged in a mosaic so as to have a desired design, the light-emitting sheet has an excellent aesthetic appearance. Can be used for wall decoration.

  In the configuration in which the cut groove is formed between the light emitting devices adjacent to each other, the size of the light emitting sheet can be adjusted by appropriately cutting and separating the light emitting device. In addition, individual light emitting devices that have been cut and separated can also be used.

(A)-(c) is a perspective view of the basic light-emitting device by this invention, and all have a rectangular parallelepiped shape. FIG. 3 is a perspective view of another light emitting device according to the present invention. (A) is a perspective view of another light-emitting device according to the present invention, and (b) is an elevational view of the light-emitting device. (A) is a perspective view of another light-emitting device according to the present invention, and (b) is an elevational view of the light-emitting device. (A) is a perspective view of another light-emitting device according to the present invention, and (b) is a plan view of a keyhole using the light-emitting device. FIG. 3 is a perspective view of a light emitting sheet according to the present invention. FIG. 3 is a perspective view of another light emitting sheet according to the present invention. (A) is the top view of the other light emission sheet | seat by this invention, (b) has shown the state which cut | disconnected each light emitting device from the light emission sheet | seat, and was affixed on the wall surface.

  The example of FIG. 1A is a basic light emitting device 1 according to the present invention, which includes a substrate 11, a self-luminous light emitting part 12, and a translucent cover part 13 that covers the light emitting part 12. Yes.

  The substrate 11 is a base for forming the light emitting unit 12, and may have any shape. For example, a plate having a size smaller than the upper and lower surfaces of the translucent cover portion 13 may be used. The substrate 11 may be formed of a metal material, a glass material, a resin material, or the like. In addition, the part which forms the light emission part 12 of the board | substrate 11 is good also as a concave shape.

  The light emitting unit 12 includes a light emitting substrate made of various phosphors and phosphorescent materials, and a radioactive substance that supplies energy to the light emitting substrate. The radioactive substance is not particularly limited, but a tritium compound that emits weak beta rays is preferable. Since the half life of tritium is more than 13 years, the light emitting device 1 using tritium has a life of about 10 years. Another element that emits beta rays includes, for example, promesium, and the compound can also be used in the present invention.

  In the light emission of the light-emitting substrate, electrons are excited by externally applied energy in specific atoms constituting the light-emitting substrate, and when the electrons return to the ground state, light having a wavelength corresponding to the energy difference is emitted. It is a phenomenon. Since the energy difference between the ground state and the excited state is specific to the composition and structure of the light emitting substrate, the emission color differs depending on the type of the light emitting substrate. Since the radioactive substance always supplies energy to the light emitting substrate, the light emitting unit 12 has a self-luminous property.

  Examples of the phosphor include oxides such as zinc and cadmium, sulfides, platinum cyanide complex, and aniline.

  On the other hand, the phosphor is a substance that phosphoresces and emits phosphorescence, and examples thereof include zinc sulfide, strontium aluminate, and aluminum phosphate. If such a substance is used, daytime ambient light can also be stored, so that the brightness is higher than that in the case of using a phosphor and the effect is conspicuous.

  In addition, although the self-light-emitting paint containing the light-emitting substrate and the tritium compound has been used as a night-light paint for a wristwatch, it may be used as the light-emitting portion 12 of the present invention.

  The translucent cover portion 13 can be formed of a transparent or colored translucent glass material or resin, but is preferably formed of a flexible polymer polymer. If it does so, it will become difficult to damage the light-emitting device 1. FIG. When a tritium compound is selected as the radioactive substance constituting the light emitting unit 12, beta rays emitted from the tritium compound are low energy and weak, and therefore can be shielded even if the translucent cover unit 13 is thin. As disclosed in Japanese Patent Laid-Open No. 54-116970, the translucent cover portion 13 may be formed of a resin that does not contain hydrogen.

  The production of such a light emitting device 1 will be briefly described. A paste in which a light emitting substrate and a radioactive substance are dispersed in a predetermined solvent is prepared, and the paste is applied to the center of the substrate 11. The paste applied to the substrate 11 is solidified by evaporation of the solvent to form the light emitting unit 12. Then, if the board | substrate 11 in which the light emission part 12 was formed is sealed with the translucent cover part 13, the light-emitting device 1 will be obtained. The translucent cover 13 may be formed by adhering and fixing a preformed one to the substrate 11, or the substrate 11 is immersed in a molten polymer and the polymer is solidified. You may form by making.

  On the back side of the light emitting device 1, there are provided an adhesive layer 14 for adhering the device to a wall surface and the like, and a protective sheet 15 that protects the adhesive layer 14 until use. The protective sheet 15 may be release paper. Types of the adhesive layer 14 and the protective sheet 15 are not particularly limited, and for example, a commercially available double-sided tape may be used. The wall surface may be any wall surface such as a wall surface inside or outside a building, a wall surface such as furniture, or a wall surface of home appliances.

  In the example of FIG. 1B, the area of the substrate 11 is the same as the upper surface of the translucent cover portion 13. That is, the light emitting device 1 has a structure in which the light emitting device 1 is covered with the translucent cover portion 13 having the same area as the surface of the substrate 11.

  In the example of FIG. 1C, the light emitting portion 12 is formed on the surface of the substrate 11 made of a glass material or resin, and the translucent cover portion 13 is covered. In this structure, the substrate 11 and the translucent cover portion 13 may be made of the same material.

  In the example of FIG. 2, the shape of the light emitting device 1 is a disc body. The basic structure is the same as in the example of FIG. Moreover, the shape of the light-emitting device 1 is not limited to a rectangular parallelepiped or a disk, and may be any shape.

  The light emitting device 1 as described above is used by sticking to a place such as a keyhole of a door, a lighting switch, or the tip of a drawstring where the place is searched by night. That way, it always emits light, so you can spot it quickly even in the dark. Moreover, you may use the light-emitting device 1 as a one-point ornament.

  Hereinafter, application examples of the present invention will be described.

  3 (a) and 3 (b) is a modification of the light emitting device 1 shown in FIG. 1 (b). A hollow layer 16 covers the light emitting part 12 inside the translucent cover part 13. FIG. The hollow layer 16 is filled with water. This water has the effect of decelerating and blocking neutron rays emitted from radioactive materials. In this way, the neutron beam is cut off, so safety is increased. Further, if the substrate 11 is made of lead, gamma rays and X-rays can be cut off, which further increases safety. FIG. 3B is an elevation view of the light emitting device 1 shown in FIG.

  4 (a) and 4 (b) is a modification of the light emitting device 1 shown in FIG. 1 (c), and the substrate 11 and the translucent cover portion 13 are both made of a polymer, Inside them, the hollow layer 16 is formed so as to cover the light emitting part 12. And as above, they are filled with water. Even in this way, the neutron beam can be blocked.

  In the example of FIG. 5A, the shape of the light-emitting device 1 is a disk body with a hole in the center. The basic structure is the same as in the example of FIG. FIG.5 (b) has shown the utilization form which attached this light-emitting device 1 to keyhole parts 30, such as a dwelling door. The hole in the center portion matches the outer diameter of the keyhole 31, and the key can be inserted into the keyhole 31 through this hole. In this case, even if the door is not illuminated at night, the location of the keyhole 31 is known by the light emitting device 1, so that locking and unlocking can be performed easily.

  The example of FIG. 6 is a light emitting sheet 2 including a plurality of light emitting devices 1 and has a structure in which a plurality of light emitting devices 1 are connected in a planar manner. Each of the light emitting devices 1 may be any of the above. A cut groove 21 is formed between adjacent light emitting devices 1. It is desirable that the cut groove 21 can be cut and separated with only fingers, for example, by forming the groove by thinning the translucent cover portion 13, but it is sufficient that the cut groove 21 can be easily cut with an instrument such as a knife or scissors. In addition, such a light-emitting sheet 2 can be used as it is, as a single light-emitting device 1, or by being cut and separated and attached to a wall surface or the like. In addition, the adhesive layer 14 and the protective sheet 15 are preferably provided with cuts that match the cut grooves 21.

  The example of FIG. 7 has a structure in which the light emitting device 1 in the shape of a disk is connected in a planar manner by deformation of the light emitting sheet 2. Thus, the light-emitting device 1 that constitutes the light-emitting sheet 2 is not limited to a rectangular shape, and may have any shape. In this example as well, a cut groove 21 is formed between adjacent light emitting devices 1.

  The example of FIG. 8A is a further modification of the light emitting sheet 2 and is mainly intended for decoration of the wall surface. Specifically, a pentahedron light emitting device 1 having a triangular upper and lower surfaces is connected in a planar manner, and the light emitting device 1 uses a plurality of types having different emission colors. As described above, since the emission color is specific to the type of the light-emitting substrate, the light-emitting device 1 having a desired emission color can be obtained by appropriately selecting the type. Furthermore, in such a case, it is preferable to arrange the light emitting devices 1 in a mosaic manner so that the light emitting pattern becomes a desired design. Further, the light emitting device 1 may have different shapes as well as the light emission color. In addition, if the notch | groove 21 is formed between the adjacent light-emitting devices 1, as shown in FIG.8 (b), each light-emitting device 1 will be cut and separated and it will stick to a wall surface The extent of the design can be adjusted according to the situation.

  If these light emitting sheets 2 are used by sticking them to furniture such as trees and desks, and furniture, it is safe because there are obstacles at night. In addition, if it is attached to the handrails and steps of the stairs, it can be safely moved even during a power outage at night.

DESCRIPTION OF SYMBOLS 1 Light-emitting device 2 Light-emitting sheet 11 Substrate 12 Light-emitting part 13 Translucent cover part 14 Adhesive layer 15 Protection sheet 16 Hollow layer 21 Cut groove

Claims (9)

At least a self-luminous light emitting part and a translucent cover part covering the light emitting part,
The light emitting unit is a light emitting device including a light emitting substrate and a radioactive substance that supplies energy to the light emitting substrate. In claim 1,
The light emitting unit is a light emitting device formed on a substrate made of lead. In claim 1 or 2,
The translucent cover part is a light emitting device formed of a polymer. In claim 3,
The translucent cover part is a light emitting device in which a hollow layer is formed so as to cover the light emitting part, and the hollow layer is filled with water. In any one of Claims 1-4,
The light emitting device, wherein a back surface of the light emitting device is provided with an adhesive layer for adhering the device to a wall surface and a protective sheet for protecting the adhesive layer until use. In any one of Claims 1-5,
The light emitting device in which the radioactive substance contains tritium. A light-emitting sheet comprising a plurality of light-emitting devices according to claim 1,
A light emitting sheet having a configuration in which the light emitting devices are arranged in a plane. In claim 7,
The light-emitting sheet is composed of at least two types of light-emitting devices having different emission colors, and the plurality of types of light-emitting devices are arranged in a mosaic so as to form a desired design. In claim 7 or 8,
The light emitting sheet is a light emitting sheet in which a slit is formed between adjacent light emitting devices.

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