JP2011228408A - Lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting device capable of achieving optimal light emitting control of a plurality of LEDs with reduced mounting cost, and capable of heat radiation from the light emitting elements even when high-luminance light emission is performed.SOLUTION: A lighting device 1 includes: a mounting substrate 2; a plurality of light emitting elements 3 each mounted on the mounting substrate 2 in a bare chip state; a sealing frame 4 disposed on the mounting substrate 2 in such a manner as to enclose the periphery of the plurality of light emitting elements 3; a sealing material 5 filled inside the sealing frame 4, for sealing the light emitting elements while contacting to the light emitting elements; and a heat conduction member 50 disposed inside the sealing material 5, for conducting heat from at least a portion of the light emitting elements 3 and the sealing material 5.

Description

  The present invention relates to an illuminating device that can release heat generated from a light emitting element while using a sealing frame and a sealing material necessary for mounting a light emitting element such as a bare chip LED (Light Emitting Diode).

  Light emitting elements such as LEDs are increasingly used in lighting devices as new light sources to replace conventional fluorescent lamps and incandescent lamps. A light-emitting element using a semiconductor such as an LED can provide advantages such as being small in size, low power consumption, and being capable of easily controlling a light emission color and a light emission pattern.

  Conventionally, an LED that is a single LED and sealed in a package is contoured with a resin or the like to control light emission (see, for example, Patent Document 1). In addition, there is a document disclosing a technique for condensing an LED used for a backlight of a liquid crystal screen on a liquid crystal screen (see, for example, Patent Document 2).

  On the other hand, in order to easily generate various emission colors and emission patterns, it is more convenient to mount a plurality of LEDs together. This is because in the case of arranging light emitting units in which single LEDs are individually sealed, there is a demerit that a light emission pattern or light emission color as expected by the control side cannot be obtained due to variations in the sealing state of individual LEDs. .

  In recent years, many LEDs are arranged, and complex emission colors and emission patterns are controlled by a computer program. When arranging individually packaged and sealed LEDs, sealing is performed. An adverse effect due to variation occurs. These are particularly prominent in the field of signal devices and the like.

  For this reason, mounting a plurality of LEDs, sealing the plurality of mounted LEDs together, and controlling light emission of the sealed plurality of LEDs has been required. In particular, in order to reduce the mounting cost and the sealing cost, it has been required to simultaneously seal a plurality of LEDs and control the light of the LEDs.

  Under such circumstances, techniques for mounting a plurality of light emitting elements have been proposed (see, for example, Patent Documents 3 and 4). In addition, a technique for discharging heat from the light emitting element while mounting the light emitting element has been proposed (see, for example, Patent Document 5).

JP 2007-88098 A JP 2006-100575 A JP-A-11-162232 JP 2007-227679 A Japanese Patent Laying-Open No. 2005-311170

  Patent Documents 1 and 2 disclose a technique for sealing a single LED. Patent Document 1 discloses a technique for sealing a single LED with a shell-type case. Although a technique for constructing a shell-type case using a resin or a lens is disclosed, the shell-type case can only be applied to a single LED, and it is difficult to seal a plurality of LEDs.

  Patent Document 2 discloses a technique in which a concave lens is provided in front of a single LED and light from the LED is condensed on a liquid crystal screen. This technology is also difficult to apply to controlling light collection while sealing a plurality of LEDs.

  Patent Document 3 discloses a technique for mounting a plurality of bare chip LEDs and forming a resin sealing material and a microlens on the mounted LEDs. Patent Document 1 discloses a solution that a plurality of LEDs are mounted with a resin sealing material, and a lens group (a lens group is a microlens) that is disposed at a position corresponding to each of the plurality of LED elements. Thus, the solution is to guide the light emission of each LED to the outside.

  However, since each lens of the microlens controls light corresponding to each LED of a plurality of LEDs, there is a problem that control variation occurs. There is a problem that variations in individual lenses adversely affect the necessity of generating a light emission color or light emission pattern based on the whole of a plurality of LEDs, such as a signal or a fishing light.

  In addition, there is a problem that costs increase due to the use of microlenses.

  Patent Document 3 separately captures a mechanism for sealing an LED and a mechanism for controlling light, and cannot deal with problems such as variations in light control and cost increase.

  Patent Document 4 discloses a configuration in which a resin is filled in a portion in contact with an LED inside the lens plate and the resin protects the LED based on a large lens plate that seals a plurality of LEDs.

  However, since the technique of Patent Document 4 seals a plurality of LEDs based on the lens plate, there is a problem that the light emission control of the LEDs depends on the accuracy of the lens plate. In addition, LED sealing also has a problem that depends on the size and durability of the lens plate, which is not suitable for controlling light emission while sealing many LEDs together.

  Patent Document 5 discloses a technique in which a metal mesh is disposed inside a resin that seals a light emitting element to discharge heat of the light emitting element.

  However, as with other patent documents, the mechanism for sealing the light emitting element and the mechanism for controlling light are separate, and there is a problem that the control of light varies. In addition, the metal mesh does not have a mechanism for exhausting heat from the light emitting element to the outside, and there is a problem that exhaust heat is insufficient. In addition, even if heat is transmitted from the metal mesh to the sealing frame, it is necessary to discharge the heat, but Patent Document 5 does not disclose these mechanisms. If heat is exhausted from the surface of the sealing frame, there is a problem that the sealing frame is enlarged and adversely affects the emission control of the light emitting element.

  As described above, the illumination device of the prior art is configured with a mechanism for sealing a plurality of LEDs and a mechanism for controlling light separately, and there is a problem that light control varies and costs increase. is doing. In particular, when lighting is controlled by a plurality of LEDs as in a signal device or a fish lamp, it is required to control the light emission of the plurality of LEDs without variation while sealing the plurality of LEDs together. The prior art has a problem that cannot meet such a request.

  In addition, when a plurality of LEDs are sealed to form a lighting device, it is required to be applied to a device that requires high luminance, such as a signal device, a construction lighting machine, or a fish collection lamp.

  When the lighting device emits light with high luminance in this way, it emits extremely high heat in combination with the large number of LEDs. The LED transfers heat to both the mounting substrate on which the LED is mounted and the sealing material that is sealed. Among these, the heat conducted to the mounting board can be released by the mounting board that enables heat conduction. This is because the mounting substrate can release heat because of its material and structure.

  On the other hand, it is difficult for the heat that the LED transmits to the sealing material side that is the light emitting surface to be released. This is because it is difficult for the sealing material to release heat due to the structure of the LED and the characteristics of the material (often a resin).

  As described above, the illumination device according to the related art has a problem that not only the light emission can be controlled without variation while the plurality of LEDs are sealed together, but also the heat generated by the plurality of LEDs cannot be emitted. When heat cannot be released, it is difficult to cause the LED to emit light with high brightness, and there is a problem that the application of the lighting device using the LED is limited.

  In view of the above problems, the present invention is optimal for a signal device, a fish lamp, and the like, and realizes optimal light emission control of a plurality of LEDs while reducing the mounting cost. It aims at providing the illuminating device which can discharge | release.

  In order to solve the above problems, an illumination device of the present invention includes a mounting substrate, a plurality of light emitting elements mounted on the mounting substrate in a bare chip state, and a seal provided on the mounting substrate and surrounding the plurality of light emitting elements. A stop frame, a sealing material that fills the inside of the sealing frame and seals the light-emitting element while being in contact with the light-emitting element, heat provided from at least a part of the light-emitting element and the sealing material provided in the sealing material And the sealing material is transparent or translucent, and the upper surface has at least one of a concave shape and a convex shape, and the sealing material is light emitted from the light emitting element. The heat conducting member conducts heat to the sealing frame.

  The lighting device of the present invention can simultaneously seal a light emitting element in a bare chip state and control light from the light emitting element with a sealing frame, a sealing material, and a lens plate. As a result, the mounting cost of the light emitting element can be reduced. By combining an element necessary for sealing and an element necessary for light emission control, cost reduction can be realized while achieving both sealing and light emission control. In particular, since the mounting process is simplified, the mounting cost is further reduced.

  In addition, since the lighting device of the present invention can integrally control the light of the plurality of light emitting elements by the sealing frame, the sealing material, and the lens plate, it does not cause variations in the light emitting state, and the signal device, the fish lamp, etc. It can be optimally applied to.

  Further, the heat conduction member included in the sealing material can conduct and release heat conducted from the light emitting surface of the light emitting element to the sealing material.

  In addition, heat generated by sealing a plurality of light emitting elements together can be emitted to the outside through the sealing frame. As a result, since high power can be applied to the light emitting element, the lighting device of the present invention can use light with high luminance.

  In particular, it can be optimally applied to signal devices that require high brightness, construction lighting machines, and fish collection lights.

It is a side view of the illuminating device in Embodiment 1 of this invention. It is a side view of the illuminating device in Embodiment 1 of this invention. It is a front view of the illuminating device in Embodiment 1 of this invention. It is explanatory drawing which shows the heat_generation | fever control of the illuminating device in Embodiment 1 of this invention. It is a side view of the illuminating device in Embodiment 1 of this invention. It is a side view of the illuminating device in Embodiment 1 of this invention. It is a manufacturing-process figure of the illuminating device in Embodiment 1 of this invention. It is a side view of the illuminating device in Embodiment 2 of this invention. It is a side view of the illuminating device in Embodiment 2 of this invention. It is a side view of the illuminating device in Embodiment 3 of this invention. It is a front view of the illuminating device in Embodiment 3 of this invention. It is a block diagram of the signal apparatus 30 in Embodiment 4 of this invention.

  A lighting device according to a first aspect of the present invention includes a mounting substrate, a plurality of light emitting elements mounted on the mounting substrate in a bare chip state, and a sealing frame provided on the mounting substrate and surrounding the plurality of light emitting elements. A sealing material that fills the inside of the sealing frame and seals the light emitting element while being in contact with the light emitting element, and is provided inside the sealing material and conducts heat from at least a part of the light emitting element and the sealing material. The sealing material is transparent or translucent, and the upper surface has at least one of a concave shape and a convex shape, and the sealing material diffuses light emitted from the light emitting element. In addition, the heat conducting member conducts heat to the sealing frame.

  With this configuration, the lighting device integrally seals a plurality of light emitting elements with one sealing frame and a sealing material, and condenses light from the plurality of light emitting elements by the sealing frame and the sealing material. Or it can diffuse. For this reason, the manufacturing cost is reduced and the variation is eliminated, so that light with high luminance can be obtained. Further, the heat conduction member can conduct heat transferred from the light emitting element to the sealing material to the sealing frame and release the heat to the outside. As a result, the light emitting element can emit light with high luminance.

  In addition to the first invention, the illumination device according to the second invention of the present invention further includes a lens plate laminated on the upper layer of the sealing material, and the sealing material and the lens plate are transparent or translucent. Thus, the lamination of the sealing material and the lens plate performs at least one of diffusing and condensing the light emitted from the light emitting element.

  With this configuration, the lighting device can collect and diffuse the light from the light emitting element by the lens plate and the sealing material.

  In the lighting device according to the third aspect of the present invention, in addition to the first or second aspect, at least one of the height and area of the sealing frame is determined according to the number of light emitting elements.

  With this configuration, the sealing frame and the sealing material can optimally radiate light from the light emitting element to the outside.

  In the lighting device according to the fourth aspect of the present invention, in addition to any one of the first to third aspects, the lens plate is a convex lens, and the laminated surface of the sealing material with the lens plate is concave. .

  With this configuration, the lighting device can irradiate the light from the plurality of light emitting elements while collecting the light.

  In the lighting device according to the fifth aspect of the present invention, in addition to any one of the first to third aspects, the lens plate is a concave lens, and the laminated surface of the sealing material with the lens plate is convex. is there.

  With this configuration, the lighting device can irradiate the light from the plurality of light emitting elements while diffusing the light.

  In the illuminating device according to the sixth aspect of the present invention, in addition to any one of the first to fifth aspects, the laminated surface of the sealing material and the lens plate is formed by the sealing material and the lens plate having a gap. The laminated surface has voids.

  With this configuration, the lighting device can diffuse the light of the light emitting element to form more various light emitting patterns. Further, the lighting device can uniformly radiate the light of the light emitting element to the outside.

  In the lighting device according to the seventh aspect of the present invention, in addition to any one of the first to sixth aspects, at least a part of the transmittance and the refractive index of the sealing material and the lens plate are different.

  With this configuration, the lighting device can diffuse the light of the light emitting element to form more various light emitting patterns. Further, the lighting device can uniformly radiate the light of the light emitting element to the outside.

  In the lighting device according to the eighth invention of the present invention, in addition to any of the first to seventh inventions, the side surface of the sealing frame has an inclined surface that is inclined from the lens plate side to the mounting substrate side, The inclined surface reflects light from the light emitting element.

  With this configuration, the illuminating device can reflect the light from the light emitting element to the outside by using the inclined surface, and can use most of the light emitted from the light emitting element for external irradiation efficiently.

  In the lighting device according to the ninth aspect of the present invention, in addition to any one of the first to eighth aspects, each light of the plurality of light emitting elements is reflected by the side surface of the adjacent light emitting element.

  With this configuration, the illuminating device can efficiently radiate most of the light emitted from the light emitting elements to the outside by using reflection from adjacent light emitting elements.

  In the lighting device according to the tenth aspect of the present invention, in addition to any of the first to ninth aspects, the heat conducting member has a lattice shape formed of a heat conductive material.

  With this configuration, the heat conducting member can efficiently conduct the heat inside the sealing material to the sealing frame.

  In the illuminating device according to the eleventh aspect of the present invention, in addition to the tenth aspect, the heat conducting member has a mesh shape made of metal or alloy.

  With this configuration, the heat conducting member can efficiently conduct the heat inside the sealing material to the sealing frame, and does not hinder the irradiation of light from the light emitting element.

  In the illuminating device according to the twelfth aspect of the present invention, in addition to any of the first to eleventh aspects, the heat conducting member is in thermal contact with the sealing frame.

  With this configuration, the heat conducting member can conduct heat to the sealing frame.

  In the illuminating device according to the thirteenth aspect of the present invention, in addition to any one of the first to twelfth aspects, the sealing frame further includes a heat dissipation mechanism for releasing heat from the heat conducting member.

  With this configuration, the lighting device can efficiently release the heat transmitted from the heat conducting member to the outside. As a result, the current value and voltage value that can be applied to the light-emitting element can be increased, and the luminance of light emitted from the light-emitting element can be increased.

  In the illuminating device according to the fourteenth aspect of the present invention, in addition to the thirteenth aspect, the heat dissipation mechanism includes heat dissipation fins provided on at least a part of the surface and side surfaces of the sealing frame.

  With this configuration, the lighting device can efficiently release the heat of the light emitting element and the sealing material to the outside.

  In the illuminating device according to the fifteenth aspect of the present invention, in addition to the fourteenth aspect, the radiating fin is integrally formed with the sealing frame.

  With this configuration, the thermal resistance between the radiating fin and the sealing frame is reduced, and the radiating fin can efficiently release heat.

  In the illuminating device according to the sixteenth aspect of the present invention, in addition to any of the thirteenth to fifteenth aspects, the heat conducting member and the heat dissipation mechanism emit heat generated by the light emitting element on the light emitting surface to the outside.

  With this configuration, the lighting device can suppress heat generation of the light emitting element. As a result, it is possible to irradiate light with high luminance.

  (Embodiment 1)

  Embodiment 1 will be described.

  (Overview)

  First, an overall outline of the lighting apparatus according to Embodiment 1 will be described with reference to FIG.

  FIG. 1 is a side view of the lighting apparatus according to Embodiment 1 of the present invention. FIG. 1 shows a state in which the lighting device is viewed from the side, and shows the light emitting elements present inside the sealing frame and the sealing material in a visible state. FIG. 2 shows a state in which the lighting device is viewed from above, and shows the light emitting elements present inside the sealing frame and the sealing material in a visible state.

  The illumination device 1 includes a mounting substrate 2, a plurality of light emitting elements 3 mounted on the mounting substrate 2 in a bare chip state, a sealing frame 4 surrounding the plurality of light emitting elements 3, and a light emitting element inside the sealing frame 4. 3, a sealing material 5 that seals the light emitting element 3 while being in contact with 3, and a heat conduction member 50 provided inside the sealing material 5.

  The sealing material 5 is transparent or translucent, and the surface of the sealing material 5 has at least one of a concave shape and a convex shape. With this configuration, the sealing material 5 performs at least one of diffusing and condensing the light emitted from the light emitting element 3. With this configuration, the lighting device 1 can appropriately radiate the light emitted from the plurality of light emitting elements 3 mounted in a bare chip state to the outside by using a member that seals the light emitting elements.

  Further, a heat conduction member 50 is provided inside the sealing material 5. The heat conducting member 50 is in a state of being sealed inside the sealing material 5. For example, when the molten resin forming the sealing material 5 is filled into the sealing frame 4, the heat conducting member 50 is installed in advance, and the heat conducting member 50 is sealed as it is inside the sealing material 5. Thus, the heat conductive member 50 may be provided inside the sealing material 5.

  The heat conducting member 50 conducts heat from at least a part of the light emitting element 3 and the sealing material 5 to the sealing frame 4. As a result, the heat conducting member 50 can release the heat from the light emitting element 3 and the heat from the sealing material 5 storing the heat from the light emitting element 3 to the outside.

  As a result, since the illuminating device 1 can suppress the heat generation, a high current value or voltage value can be given to the light emitting element 3, and the outside can be irradiated with high luminance.

    (Light emission of lighting device)

  Light emission of the light emitting element 3 and light irradiation by the illumination device 1 will be described.

  The plurality of light emitting elements 3 are mounted on the mounting substrate 2 by wire bonding or a ball grid. With this mounting, electric power is supplied to the light emitting element 3. The light emitting element 3 emits light by the supplied electric power. Each of the plurality of light emitting elements 3 has a unique color such as blue, red, or green. By supplying power to the light emitting elements 3 having the respective unique colors, the plurality of light emitting elements 3 emit light of blue, red, green, and mixed colors.

  A sealing frame 4 is provided around the plurality of light emitting elements 3, and a sealing material 5 made of resin or the like is placed inside the sealing frame 4. The sealing material 5 seals the plurality of light emitting elements 3 after coming into contact with the surfaces and side surfaces of the plurality of light emitting elements 3. By this sealing, the sealing material 5 protects the light emitting element 3. Moreover, since the sealing material 5 is thrown in after the sealing frame 4 is installed, the sealing material 5 has a shape and a size corresponding to the shape and size of the sealing frame 4.

  The surface (upper surface) of the sealing material 5 has at least one of a concave shape and a convex shape, and emits light from the plurality of light emitting elements 3 to the outside while performing at least one of condensing and diffusing. That is, the sealing material 5 exhibits the light emission control function of the light emitting element 3 and irradiates the light from the light emitting element 3 to the outside.

  The sealing frame 4 and the sealing material 5 have a sealing function for protecting the light emitting element 3 in a bare chip state from external exposure. Role. However, in addition to the sealing function, the sealing frame 4 and the sealing material 5 have a function of controlling the collection and diffusion of light emitted from the plurality of light emitting elements 3. .

  That is, since sealing and light emission can be realized without adding extra members, the lighting device 1 does not require extra costs. In addition, since the lighting device 1 can control light emission after sealing a plurality of light emitting elements 3 together, there is no variation in light emission or sealing for each light emitting element 3. In addition, since the sealing and the light emission control can be realized simultaneously by the same member, the sealing and the light emission control are not unbalanced, and variations in light emission are prevented. In particular, since sealing a plurality of light emitting elements 3 together leads to light emission control as it is, the lighting device 1 can realize light condensing and diffusion after causing the light emitting elements 3 to emit light together.

  The lighting device 1 may have a configuration in which the lens plate 6 is laminated on the sealing material 5. By having the lens plate 6, the sealing material 5 and the lens plate 6 can more reliably collect and diffuse light from the plurality of light emitting elements 3. As a result, the lighting device 1 can more reliably control the external irradiation by the plurality of light emitting elements 3.

  FIG. 2 is a side view of the lighting apparatus according to Embodiment 1 of the present invention. FIG. 2 shows a configuration in which the lens plate 6 is laminated on the sealing material 5.

  As shown in FIG. 2, the lens plate 6 is laminated on the sealing material 5. The lens plate 6 has a convex lens shape or a concave lens shape, and is laminated in a shape corresponding to the curve of the lens plate 6 on the laminated surface of the sealing material 5. Since the sealing material 5 is molten resin or the like when it is put into the sealing frame 4, the shape of the laminated surface of the sealing material 5 can easily correspond to the shape of the lens plate 6. As a result, the sealing material 5 and the lens plate 6 are in contact with each other with a smooth curved surface.

  The sealing material 5 and the lens plate 6 are translucent or transparent, and transmit light from the light emitting element 3. At this time, the light emitting element 3 irradiates the emitted light to the outside according to the refraction curve formed by the sealing material 5 and the lens plate 6. At this time, the sealing material 5 and the lens plate 6 perform at least one of diffusing and condensing the light of the light emitting element 3 according to the curve shape. That is, the illuminating device 1 irradiates the light of the plurality of light emitting elements 3 to the outside after collecting them by one light collecting function and diffusion function.

  That is, the sealing material 5 and the lens plate 6 are combined to control the light of the plurality of light emitting elements 3 to irradiate the outside. Compared with the case of the sealing material 5 alone, the lens plate 6 is combined to enable finer light emission control.

  In addition, since the lens plate 6 is laminated on the upper layer of the sealing material 5, the lens plate 6 also serves to protect the sealing material 5. As a result, the lighting device 1 can seal the plurality of light emitting elements 3 together and control the light emission collectively by the sealing material 5 and the lens plate 6 to irradiate light to the outside.

  With reference to FIG. 3, light irradiation by the lighting device 1 in a state viewed from the upper surface (front) of the lighting device 1 will be described. FIG. 3 is a front view of the lighting apparatus according to Embodiment 1 of the present invention. FIG. 3 shows a state in which the illumination device is viewed from above, and shows the light emitting element 3 existing inside the sealing frame 4 and the sealing material 4 in a visible state.

  In the lighting device 1 shown in FIG. 3, the sealing frame 4 surrounds the periphery of the plurality of light emitting elements 3. Here, the sealing frame 4 has a substantially circular shape when viewed from above. Since the plurality of light emitting elements 3 are mounted inside the substantially circular sealing frame 4, the light emitted from the plurality of light emitting elements 3 diffuses or collects from the substantially circular shape, and the lighting device 1. Makes it easier to adjust the light emission direction and the light emission angle. Of course, the sealing frame 4 may have a substantially elliptical shape or a polygonal shape.

  When viewed from the top, the lens plate 6, the sealing material 5, and the light emitting element 3 are laminated in this order. However, since the lens plate 6 and the sealing material 5 are translucent or transparent, the light emitting element 3. Appears to be transparent. As a result, the light emitted from the light emitting element 3 is transmitted to the outside through the lens plate 6 and the sealing material 5. At this time, the light emitted from the light emitting element 3 is diffused or condensed by the curve formed by the lens plate 6 and the sealing material 5.

  Moreover, since the illuminating device 1 is configured in a state where the sealing frame 4 to the lens plate 6 are mounted on the mounting substrate 2, the illuminating device 1 is excellent in portability and can be used as a single unit for various devices. Incorporated.

  The illuminating device 1 seals a plurality of light emitting elements 3 together and controls the light emission collectively, so that it requires a light emission amount and a light emission pattern rather than showing a detailed image of a signal device, a fish lamp, etc. It is optimally integrated into equipment.

  As described above, the lighting apparatus 1 according to Embodiment 1 can prevent variations in sealing for each light emitting element 3 by collectively sealing a plurality of light emitting elements 3 in one sealing frame 4. In addition, since the sealing material 5 and the lens plate 6 are laminated inside the sealing frame 4, the light emitted from the plurality of light emitting elements 3 can be controlled collectively. In particular, in a state where the sealing frame 4, the sealing material 5 and the lens plate 6 are in contact with each other (indicating that the sealing frame 4 is not physically separated but does not require physically strict contact). As a result, the sealing frame 4, the sealing material 5, and the lens plate 6 satisfy both a function of sealing the plurality of light emitting elements 3 and a function of controlling light emission.

  As described above, the lighting device 1 can realize the sealing function and the light emission control function of the light emitting element 3 with a small number of members. As a result, the cost can be reduced.

  In FIGS. 1 to 3, in order to ensure the clarity of the drawings, one light emitting element among the plurality of light emitting elements is denoted by “3”.

    (Light-emitting element heat generation control)

  Next, heat generation control of the light emitting element 3 in the lighting device 1 will be described with reference to FIG. FIG. 4 is an explanatory diagram showing heat generation control of the lighting device according to Embodiment 1 of the present invention. FIG. 4 shows a side surface of the lighting device and shows the inside as a see-through state. Arrows 51 and 52 indicate heat conduction paths.

  The lighting device 1 is required to be applied to a signal device, a construction lighting machine, a fish collection lamp, and the like that require high luminance. For this reason, in order for the light emitting element 3 to emit light with high luminance, the light emitting element 3 is given a high current value or a high voltage value. The light emitting element 3 generates high heat by such light emission with high luminance.

  The plurality of light emitting elements 3 emit heat from the mounting surface, the light emitting surface, and the side surfaces.

  Of these heats generated by the light emitting element 3, the heat generated from the mounting surface is released to the outside through the mounting substrate 2. This is because the plurality of light emitting elements 3 are mounted on the mounting substrate 2 by wire bonding, a ball grid, or the like, and the mounting surface of the light emitting elements 3 and the mounting substrate 2 are in thermal contact. An arrow 51 indicates the state of heat conducted from the mounting surface of the heating element 3 to the mounting substrate 2.

  On the other hand, heat generated from the light emitting surface and the side surface among the heat generated by the light emitting element 3 is conducted to the sealing material 5. This is because the sealing material 5 is in thermal contact with the light emitting surface and the side surface of the light emitting element 3 by sealing the light emitting surface and the side surface of the light emitting element 3. For this reason, the sealing material 5 receives heat from the light emitting element 3.

  The sealing material 5 is made of a molten resin or the like for the purpose of sealing the light emitting element 3. Since a molten resin or the like has poor thermal conductivity compared to a metal or the like, the sealing material 5 often accumulates heat from the light emitting element 3. If the sealing material 5 accumulate | stores the heat from the light emitting element 3, the illuminating device 1 will cause a malfunction, or will cause a damage and a failure. In order to avoid such a problem, it is necessary to reduce the current value or voltage value applied to the light emitting element 3. However, when the current value or the voltage value applied to the light emitting element 3 is lowered, the light emission luminance of the light emitting element 3 is lowered, and the lighting device 1 is applied to a signal device, a construction lighting machine, a fish lamp, and the like that require high luminance. It becomes difficult to do.

  The heat conducting member 50 is provided inside the sealing material 5 and is in thermal contact with the sealing frame 4. Therefore, the heat conducting member 50 can conduct heat from the sealing material 5 (that is, heat from the light emitting element 3) to the sealing frame 4. The sealing frame 4 is exposed to the outside and can release the heat received from the heat conducting member 50 to the outside. In particular, since the sealing frame 4 is formed of a metal, an alloy, or a resin having high thermal conductivity, the sealing frame 4 can release the conducted heat to the outside. As a result, the heat generated from at least a part of the light emitting surface and the side surface of the light emitting element 3 is released to the outside through the heat conducting member 50 and the sealing frame 4 without accumulating inside the sealing material 5. . This is indicated by the arrow 52 in FIG.

  An arrow 52 indicates a state in which the heat conducted from the light emitting element 3 to the sealing material 5 is conducted to the sealing frame 4 through the heat conducting member 50. Further, the sealing frame 4 releases the conducted heat to the outside.

  Thus, the heat conducting member 50 can efficiently release the heat inside the sealing material 5 where heat is likely to accumulate to the outside.

  Of the heat generated by the light emitting element 3, the heat from the light emitting surface and the side surface is released to the outside, thereby suppressing the heat generation of the lighting device 1. As a result, a high current value or voltage value can be given to the light emitting element 3, and the light emitting element 3 (that is, the lighting device 1) can irradiate light with high luminance.

  The signal device, the construction lighting machine, and the fish lamp are examples of devices to which the lighting device 1 is applied, and are not limited thereto.

  Next, the detail of each part is demonstrated.

    (Mounting board)

  First, the mounting substrate will be described.

  The mounting substrate 2 mounts a plurality of light emitting elements 3. The mounting substrate 2 is a substrate that can mount electronic components and semiconductor integrated circuits for general purposes, such as a glass epoxy substrate, and may be any substrate that has a wiring layer that can exchange electrical signals.

  On the mounting substrate 2, only a plurality of light emitting elements 3 used as the lighting device 1 may be mounted, or electronic components other than the light emitting elements 3 and semiconductor integrated circuits may be mounted. For example, the mounting substrate 2 is mounted with a semiconductor integrated circuit having a control function and a processing function and necessary electronic components, and a plurality of light emitting elements 3 may be mounted in a region other than these.

  In addition, the mounting substrate 2 electrically mounts the light emitting element 3 by wire bonding, flip chip, ball grid, or the like, and supplies the light emitting element 3 with an electrical signal from another circuit provided inside or outside the mounting substrate 2. Can do.

  That is, the mounting substrate 2 forms a basic shape of the lighting device 1 and gives an electric signal to the plurality of light emitting elements 3. The shape and size of the mounting substrate 2 may depend on the number of the plurality of light emitting elements 3, or may depend on the state used as the lighting device 1. Moreover, it is also preferable that the mounting substrate 2 has an adhesive surface on which the sealing frame 4 can be mounted in addition to the light emitting element 3.

    (Light emitting element)

  Next, the light emitting element 3 will be described.

  The light emitting element 3 is an element that emits light in response to an electrical signal. Any element can be used as long as it has a function of receiving an electric signal to emit light, but it is preferable to use an LED for ease of mounting and control. This is because an LED has a merit that a light emission state can be controlled by a current / voltage of an applied electric signal, and a light emission color pattern can be easily controlled by having a specific color such as blue, red, or green.

  A plurality of light emitting elements 3 are mounted on the mounting substrate 2. The number of the light emitting elements 3 may be appropriately determined according to the specification of the lighting device 1, and several to several hundreds (or several thousand) light emitting elements 3 are mounted on the mounting substrate 2. The light emitting element 3 is mounted on the mounting substrate 2 by wire bonding or a ball grid, and is electrically connected to the mounting substrate 2 (and further to other electronic components mounted on the mounting substrate 2). Connected. By this electrical connection, the light emitting element 3 emits light upon receiving an electrical signal.

  The light emitting element 3 emits light according to the current value / voltage value of the received electric signal and the waveform pattern of the signal, and emits light based on the intrinsic color of the light emitting element 3. Based on these light emission changes, the light emitting element 3 realizes various light emission patterns. Based on the mounting substrate 2 or a control function provided separately from the mounting substrate 2, the light emitting element 3 realizes light emission according to various standards such as color, light emission level, and light emission interval.

  Each of the light emitting elements 3 is mounted on the mounting substrate 2 in a bare chip state. By mounting in a bare chip state, the cost and volume of the light emitting element 3 can be reduced, and the cost and volume of the lighting device 1 can be reduced. In addition, since the light emitting element 3 is mounted in a bare chip state, the light emitted from the light emitting element 3 can be directly received by the sealing material 5 and the lens plate 6, and unnecessary light emission control is unnecessary. For this reason, it is preferable that the light emitting element 3 is mounted in a bare chip state.

  Moreover, since the light emitting element 3 is in a bare chip state, the light emitting element 3 has a front surface, a back surface, and a side surface. The back surface is a mounting surface with the mounting substrate 2 and emits light from at least a part of the front surface and the side surface. In addition, since the plurality of light emitting elements 3 are mounted on the mounting substrate 2, the light emitting elements 3 may cause reflection of light between adjacent light emitting elements.

  Each of the light emitting elements 3 has a unique color, and emits light according to an applied current value and voltage value. The light emitting elements 3 having the same intrinsic color may be arranged together or may be arranged for different intrinsic colors. Moreover, each of the some light emitting element 3 may be connected in parallel, and may be connected in series. Of course, the plurality of light emitting elements 3 may be electrically connected in a state where parallel connection and series connection are mixed.

  As described above, by mounting the plurality of light emitting elements 3 on the mounting substrate 2 in a bare chip state, the plurality of light emitting elements 3 can produce various light emission colors, light emission levels, and light emission patterns.

(Sealing frame)
Next, the sealing frame 4 will be described.

  The sealing frame 4 surrounds the plurality of light emitting elements 3 mounted on the mounting substrate 2. As shown in FIG. 2, the sealing frame 4 surrounds a plurality of light emitting elements 3 to be mounted. The sealing frame 4 preferably surrounds the periphery of the light emitting element 3 while forming a substantially circular or substantially elliptical shape, but may surround the periphery of the light emitting element 3 while forming a square or a polygon.

  The sealing frame 4 forms the outer shape of the lighting device 1. In other words, the lighting device 1 performs light collection and diffusion of the light emitting element 3 by the sealing frame 4, the sealing material 5, and the lens plate 6. The sealing frame 4 forms the basic outline of a mechanism that performs this light collection and diffusion. For this reason, the sealing frame 4 has a shape and an outer shape according to the condensing and diffusing specifications of the plurality of light emitting elements 3.

  Further, at least one of the height and the opening area of the sealing frame 4 is determined according to the number of the light emitting elements 3. If the number of the light emitting elements 3 is large, the outer periphery of the sealing frame 4 becomes large, so that the opening area of the sealing frame 4 becomes large. In addition, since the amount of light emitted from the light emitting element 3 increases as the number of the light emitting elements 3 increases, the height of the sealing frame 4 increases to reflect a large amount of light.

  Since the sealing material 5 is thrown into the sealing frame 4, it is preferable that the outer periphery of the sealing frame 4 is closed. This is because the sealing material 5 is often a molten resin and prevents the molten resin to be introduced from leaking out of the sealing frame 4. For this reason, the sealing frame 4 is a frame material, and the frame material may be installed on the mounting substrate 2.

  The sealing frame 4 may be formed of resin, metal, alloy, or the like, and is bonded or welded on the mounting substrate 2. An adhesive may be used for bonding. Since the sealing frame 4 releases the heat conducted from the heat conducting member 50 to the outside, it is preferable that the sealing frame 4 be formed of a material having high heat conductivity.

  The sealing frame 4 may be transparent or translucent, but it is also preferable that the sealing frame 4 is non-transparent so that light can be reflected in order to reflect the light from the light emitting element 3 to the sealing material 5 or the lens plate 6. This is because the sealing frame 4 becomes a frame when the sealing material 5 is thrown in and becomes a reflection part of light emitted from the light emitting element 3.

  When the sealing frame 4 is installed, the sealing material 5 (melted resin or the like) is poured into a region surrounded by the sealing frame 4.

    (Encapsulant)

  The sealing material 5 fills the region surrounded by the sealing frame 4. The sealing material 5 is composed of a molten resin or the like, and the sealing material 5 is formed inside the sealing frame 4 when the molten resin is poured and solidified.

  For example, after the sealing frame 4 is installed, molten resin is poured into the sealing frame 4. When pouring, an automatic charging device is used so that an air layer and air bubbles are not generated. After pouring, the molten resin is solidified due to a decrease in temperature, and a solid sealing material 5 is formed in accordance with the outer shape of the sealing frame 4.

  Moreover, the sealing material 5 may be filled after the heat conductive member 50 is installed in advance. When the sealing material 5 is a molten resin filled in the sealing frame 4, if the molten resin is filled after the heat conducting member 50 is previously installed, the sealing material 5 is solidified by solidifying. This is because the light-emitting element 3 is sealed and the heat conducting member 50 is sealed.

  Of course, the sealing material 5 may be formed by filling (or installing) the sealing material 5 in a state of sealing the heat conducting member 50 into the sealing frame 4.

  The sealing material 5 alone or in combination with the sealing frame 4 and the lens plate 6 collects or diffuses the light of the light emitting element 3. For this reason, the sealing material 5 becomes a basic member for condensing and diffusing the light of the light emitting element 3.

  The sealing material 5 is transparent or translucent, and is transparent or translucent, thereby transmitting light emitted from the light emitting element 3. The transmitted light is radiated to the outside by the condensing or diffusing action of the lens plate 6 described later, and the light from the plurality of light emitting elements 3 is radiated to the outside. The sealing material 5 realizes the function of the lighting device 1 to output light by transmitting the light of the light emitting element 3 in this way.

  The sealing material 5 has a concave or convex upper surface (surface). This is because the light from the plurality of light emitting elements 3 is condensed or diffused. When the upper surface of the sealing material 5 has a concave shape, the sealing material 5 collects light from the light emitting element 3. Conversely, when the upper surface of the sealing material 5 has a convex shape, the sealing material 5 diffuses the light of the light emitting element 3.

  Alternatively, the shape of the upper layer surface may be determined according to the shape of the lens plate 6 described later. This is because when the lens plate 6 is laminated on the upper layer of the sealing material 5, the shape of the upper surface of the sealing material 5 is determined by the shape of the lens plate 6.

  When the lens plate 6 is laminated, the shape of the sealing material 5 is determined according to the shape of the lens plate 6. Depending on the shape of the lens plate 6 and the shape of the sealing material 5, the lighting device 1 can determine whether the light of the light emitting element 3 is condensed or diffused.

    (Heat conduction member)

  Next, the heat conductive member 50 will be described.

  The heat conducting member 50 is provided inside the sealing material 5. The heat conducting member 50 conducts heat transmitted from the light emitting element 3 to the sealing material 5 to the sealing frame 4. The heat conducted to the sealing frame 4 is released from the sealing frame 4 to the outside.

  The heat conducting member 50 is in thermal contact with the sealing frame 4 in order to conduct the heat existing inside the sealing material 5 to the sealing frame 4. For this reason, it is also suitable that the edge part of the heat conductive member 50 is contacting the sealing frame 4, for example.

  Since the heat conduction member 50 conducts the heat transmitted from the light emitting element 3 to the sealing material 5 to the sealing frame 4, it is preferable that the heat conduction member 50 be formed of a material having high heat conductivity. For example, metals and alloys. As an example, the heat conductive member 50 is preferably formed of a metal having high thermal conductivity or high rust prevention (or durability) such as copper, aluminum, silver, aluminum alloy, iron, iron alloy, and stainless steel. .

  Further, the heat conducting member 50 has a function of conducting heat of the sealing material 5 to the sealing frame 4, but it is inconvenient to prevent the light from the light emitting element 3 from being irradiated to the outside. For this reason, it is also preferable that the heat conductive member 50 has a lattice shape formed of a heat conductive material as shown in FIG. For example, the heat conductive member 50 may have a mesh shape formed of a metal, an alloy, or a resin having high heat conductivity.

  Since the heat conductive member 50 has a lattice shape, the heat of the sealing material 5 can be conducted to the sealing frame 4 and the light from the light emitting element 3 is not inhibited. This is because the light from the light emitting element 3 escapes from the lattice-shaped empty area. In particular, when a high current value or voltage value is applied to the light emitting element 3 and the light emitting element 3 emits light with high luminance, the lattice-shaped heat conduction member 50 is unlikely to hinder light emission. In particular, when the lighting device 1 is used in a device that requires luminance but does not require high-definition light emission or color development, such as a signal device, a construction lighting machine, and a fish collection lamp, the heat conducting member 50 emits light. It is difficult to become an obstruction factor for light from the element 3.

  In addition, when the heat conductive member 50 has a lattice shape, it is only necessary to have a lattice shape that matches the number of the light emitting elements 3 and the arrangement interval of the light emitting elements 3. For example, the number and area of vacant regions in the lattice shape are preferably matched with the arrangement interval of the light emitting elements 3.

  Further, the heat conducting member 50 may have a lattice shape formed of a frame such as a circle, an ellipse, or a polygon, other than the lattice shape formed of a rectangular frame. Of course, any shape may be used as long as it can conduct heat of the sealing material 5 and does not hinder irradiation of light from the light emitting element 3.

  The heat conductive member 50 may be provided inside the sealing material 5, but may be provided at any position between the light emitting element 3 and the upper surface of the sealing material 5. For example, the heat conducting member 50 may be provided inside the sealing material 5 at an approximately intermediate position between the light emitting element 3 and the upper surface.

  As described above, the heat conducting member 50 is provided inside the sealing material 5, and conducts heat from at least a part of the light emitting element 3 and the sealing material 5 to the sealing frame 4.

    (Lens plate)

  Next, the lens plate 6 will be described. The lens plate 6 is laminated on the upper layer of the sealing material 5 as necessary. Alternatively, the lens plate 6 is used when manufacturing the lighting device 1 in order to form the surface shape of the sealing material 5.

  The lens plate 6 is laminated on the upper layer of the sealing material 5. The lens plate 6 collects or diffuses the light from the plurality of light emitting elements 3 together with the sealing frame 4 and the sealing material 5. The shape and structure of the lens plate 6 controls the light from the light emitting element 3.

  The lens plate 6 is made of glass or resin. The lens plate 6 is transparent or translucent, and transmits the light of the light emitting element 3 together with the sealing material 5. During the light transmission process, the illumination device 1 collects or diffuses the light from the light emitting element 3 and outputs the light to the outside depending on the shapes of the sealing material 5 and the lens plate 6.

  The lens plate 6 may have an outer periphery that matches the outer periphery of the sealing frame 4, or may have an outer periphery that is smaller than the outer periphery of the sealing frame 4. However, since the lens plate 6 has a shape matched to the outer periphery of the sealing frame 4, the sealing material 5 is sealed by the sealing frame 4 and the lens plate 6, and thus the durability of the lighting device 1. And there is a merit that strength improves.

  Since the lens plate 6 is laminated on the upper layer of the sealing material 5, the shape of the sealing material 5 (the shape of the laminated surface of the sealing material 5 with the lens plate 6) is determined by the shape of the lens plate 6. The shape of the lens plate 6 and the sealing material 5 combined determines whether the light from the plurality of light emitting elements 3 is collected or diffused.

  For example, when the lens plate 6 is a convex lens, the laminated surface of the sealing material 5 with the lens plate 6 has a concave shape. FIG. 5 is a side view of the lighting apparatus according to Embodiment 1 of the present invention.

  FIG. 5 shows a form in which the lens plate 6 is a convex lens and the laminated surface of the sealing material 5 with the lens plate 6 has a concave shape. The arrows in FIG. 5 indicate the direction in which the light of the light emitting element 3 travels. The light from the light emitting element 3 travels straight inside the sealing material 5 which is transparent or translucent. The light traveling straight reaches the lens plate 6 from the sealing material 5. Since the lens plate 6 is a convex lens, the light is collected by the lens plate 6 as indicated by the arrow. By collecting the light, the light from the plurality of light emitting elements 3 is collected in a predetermined area, and very high luminance can be realized in the predetermined area.

  For example, the present invention is applied to a lighting device that is required to easily recognize light from a distance. For example, the illuminating device 1 shown in FIG. 5 is applied to a signal device, a fish lamp, or the like.

  In FIG. 5, the lens plate 6 is a convex lens, and the laminated surface of the sealing material 5 has a concave shape in accordance with this, but the lens plate 6 has a convex shape only on the upper surface and is laminated. The surface may be flat. With such a shape, the lighting device 1 can gently collect the light of the light emitting element 3.

  Alternatively, the lens plate 6 may have a flat shape, and the laminated surface of the sealing material 5 may also have a flat shape. In this case, the illuminating device 1 can substantially straighten the light of the light emitting element 3.

  Further, the lens plate 6 is a concave lens as shown in FIG. 6, and the laminated surface of the sealing material 5 with the lens plate 6 may be convex. FIG. 6 is a side view of the lighting apparatus according to Embodiment 1 of the present invention. Moreover, the arrow in FIG. 6 has shown the advancing direction of the light from the light emitting element 3. FIG.

  The lens plate 6 is a concave lens, and the laminated surface of the sealing material 5 with the lens plate 6 has a convex shape according to this shape. As indicated by the arrows in FIG. 6, the light from the light emitting element 3 passes through the sealing material 5 and reaches the lens plate 6. Since the lens plate 6 is a concave lens, the lens plate 6 diffuses the light of the light emitting element 3 as indicated by an arrow. By this diffusion, the lighting device 1 can irradiate the light of the light emitting element 3 over a wide range.

  For example, the present invention is applied to a lighting device that is required to easily recognize light from various angles. It is applied to equipment that needs to brighten a wide area uniformly during night work.

  Further, since the sealing frame 4 has a function of adjusting the traveling direction of the light traveling through the sealing material 5, the light of the light emitting element 3 can also be obtained by combining the shapes of the sealing frame 4 and the lens plate 6. The direction of travel is adjusted.

  The lens plate 6 condenses or diffuses the light of the light emitting element 3 together with the sealing frame 4 and the sealing material 5. In addition, the sealing material 5 originally has a function of protecting the light emitting element 3 mounted in a bare chip state, and controls the light irradiation direction in addition to the protection by stacking with the lens plate 6. It has a function. Thus, the sealing material 5 and the lens plate 6 can realize a plurality of functions with a small number of members. As a result, the manufacturing process of the lighting device 1 is simplified, and the manufacturing cost can be reduced.

  As described above, the lighting device 1 irradiates a large amount of light to the outside while condensing or diffusing the light of the light emitting element 3.

  In addition, since the plurality of light emitting elements 3 are sealed with the single sealing frame 4 and the sealing material 5, the light emitting element 3 has a high current value and a high voltage value with excellent durability and no variation. Can be granted. As a result, the light emitting element 3 can emit light with high luminance.

(Manufacturing process)
Next, the manufacturing process of the lighting device 1 will be described.

  FIG. 7 is a manufacturing process diagram of the illumination device according to the first embodiment of the present invention.

  FIG. 7 shows each step in order from the top. FIG. 7 shows the case where the lens plates 6 are laminated. However, if the lens plates 6 are not laminated, the final process may be omitted. Or after pressing the lens board 6 against the sealing material 5, the process of removing the lens board 6 and shape | molding the surface shape of the sealing material 5 may be added.

  First, the mounting substrate 2 is installed.

  Next, a plurality of light emitting elements 3 in a bare chip state are mounted on the mounting substrate 2. In mounting, electrical connection to the light emitting element 3 is realized by wire bonding or the like. The number and type of the plurality of light emitting elements 3 are determined according to the specifications of the lighting device 1.

  Further, the sealing frame 4 is mounted so as to surround the periphery of the plurality of mounted light emitting elements 3. The sealing frame 4 is installed on the mounting substrate 2 by adhesion or welding.

  Next, the heat conducting member 50 is installed inside the sealing frame 4.

  It is appropriate that the heat conducting member 50 be installed at a height above the light emitting element 3 and covered with the sealing material 5. The sealing frame 4 has a cut at a position where the heat conducting member 50 is installed in advance, and the heat conducting member 50 may be installed in accordance with this cut. This is because not only the installation of the heat conducting member 50 is ensured but also the heat conducting member 50 can be in thermal contact with the sealing frame 4.

  Next, the inside of the sealing frame 4 is filled with molten resin or the like. The molten resin serves as the sealing material 5 to protect the light emitting element 3 in a bare chip state and seal the heat conducting member 50. The sealing material 5 is formed of a transparent or translucent material and solidifies, so that the light from the light emitting element 3 can be transmitted to the outside while being transmitted.

  When the sealing material 5 is filled, the sealing material 5 seals the light emitting element 3 and the heat conducting member 50 together.

  Further, a lens plate 6 is laminated on the upper layer of the sealing material 5. By laminating the lens plate 6, the surface shape of the sealing material 5 is determined. Furthermore, the lighting device 1 can output the light of the light emitting element 3 to the outside by stacking the lens plate 6 and the sealing material 5. Furthermore, based on the shape and laminated structure of the sealing material 5 and the lens plate 6, the lighting device 1 can collect or diffuse the light from the light emitting element 3.

  Thus, the illuminating device 1 is manufactured by combining each member sequentially.

As described above, the illumination device 1 according to Embodiment 1 collectively controls the light emission of the plurality of light emitting elements only by the element that seals the plurality of light emitting elements 3. In addition, the lighting device 1 can efficiently conduct the heat transmitted from the light emitting surface and the side surface of the light emitting element 3 and transmitted to the sealing material 5 to the sealing frame 4 and release it to the outside. Thus, since the illuminating device 1 can control the heat generation of the light emitting element 3 (and the illuminating device 1 itself) by the heat conducting member 50, a high current value or voltage value can be given to the light emitting element 3. Can emit light with high brightness.
(Embodiment 2)

  Next, a second embodiment will be described.

  In the second embodiment, an illuminating device that controls the light from the light emitting element 3 more finely by the form of the sealing material 5 and the lens plate 6 will be described.

    (Mode in which a gap exists on the laminated surface of the sealing material and the lens plate)

  FIG. 8 is a side view of the lighting apparatus according to Embodiment 2 of the present invention. Components denoted by the same reference numerals as those in FIG. 1 have the same configurations and functions as those described in the first embodiment.

  In FIG. 8, the lighting device 1 has a gap 10 on the laminated surface of the sealing material 5 and the lens plate 6. The gap 10 may be formed at the stage of stacking the sealing material 5 and the lens plate 6, or may be formed by having a shape in which the sealing material 5 becomes a gap in advance.

  Since the laminated surface of the sealing material 5 and the lens plate 6 includes the gap 10, the light from the light emitting element 3 is irregularly reflected in the gap 10. Due to this irregular reflection, the illumination device 1 can diffuse the light from the light emitting element 3 more.

  The illuminating device 1 is suitably used for a signal device or a fish collection lamp. It is desirable to output the signal device and the fish collecting light over a wide angle. Since the light from the light emitting element 3 is diffusely reflected in the gap 10, the light output through the lens plate 6 is diffused over a wider range. As a result, the light output from the lighting device 1 can illuminate a wide range.

  In addition, the light from the light emitting element 3 is irregularly reflected in the gap 10, so that the lighting device 1 can emit gorgeous light. In particular, the irregular reflection of light from the light emitting element 3 is controlled in various ways depending on the shape of the gap 10, and the lighting device 1 can realize various light emission.

  When such a gap 10 is provided between the sealing material 5 and the lens plate 6, an air layer having poor thermal conductivity is formed between the sealing material 5 and the lens plate 6. This makes it difficult for heat to be conducted from the sealing material 5 to the lens plate 6, so that heat from the light emitting surface and side surfaces of the light emitting element 3 tends to stay inside the sealing material 5.

  Even in such a case, the heat conduction member 50 is provided inside the sealing material 5, so that the heat conduction member 50 receives heat accumulated in the sealing material 5 and conducts it to the sealing frame 4. be able to.

  In addition, although the space | gap 10 may become an air layer, the filler of the raw material different from the sealing material 5 may be filled. For example, by filling with a filler having a refractive index or transmittance different from that of the sealing material 5, light from the light emitting element 3 is transmitted in the order of the sealing material 5, the filler, and the lens plate 6. At this time, the lighting device 1 can realize further various types of light emission by determining the traveling direction of light according to different refractive indexes and transmittances.

    (Transmissivity between sealing material and lens plate)

  Moreover, the illuminating device 1 from which at least one of the transmittance | permeability and refractive index of the sealing material 5 and the lens board 6 differs is also suitable.

  When the sealing material 5 and the lens plate 6 are laminated inside the sealing frame 4, the light from the light emitting element 3 passes through the sealing material 5 and then passes through the lens plate 6. That is, the light of the light emitting element 3 is transmitted through the two members continuously.

  For this reason, the light from the light emitting element 3 is output to the outside according to the transmittance and refractive index of the sealing material 5 and the lens plate 6. In other words, the lighting device 1 irradiates light to the outside based on the transmittance and refractive index of the sealing material 5 and the lens plate 6.

  At this time, when at least one of the transmittance and the refractive index of the sealing material 5 and the lens plate 6 is different, variations of light collection and diffusion of the light emitting element 3 are widened.

  Due to the spread of this variation, the lighting device 1 can diffuse light uniformly or diffuse light non-uniformly. Alternatively, with the spread of this variation, the lighting device 1 can condense light in a specific region, or can perform light collection and diffusion in a balanced manner.

  Since the illuminating device 1 is optimally used for a signal device or a fish lamp, it is preferable that light emission corresponding to specifications required for the signal device or the fish lamp can be realized. The traveling direction of light from the light emitting element 3 is determined by the shapes of the sealing material 5 and the lens plate 6, but is also determined by the difference in transmittance and refractive index. That is, by adjusting the imbalance between the transmittance and the refractive index of the sealing material 5 and the lens plate 6, the traveling direction of light from the light emitting element 3 is variously adjusted.

    (Reflection based on the sealing frame)

  It is also preferable that the side surface of the sealing frame 4 includes an inclined surface 11 that is inclined from the lens plate 6 toward the mounting substrate 2 side. FIG. 9 is a side view of the lighting apparatus according to Embodiment 2 of the present invention. In FIG. 9, the sealing frame 4 has an inclined surface 11.

  The sealing frame 4 is installed so as to surround the plurality of light emitting elements 3. For this reason, a plurality of light emitting elements 3 are arranged inside the sealing frame 4. For this reason, a part of the light from the light emitting element 3 collides with the sealing frame 4.

  At this time, when the sealing frame 4 is substantially perpendicular to the mounting substrate 2, the light from the light emitting element 3 is reflected inside the sealing material 5 even if it collides. For this reason, a part of the light of the light emitting element 3 cannot be output to the outside of the lighting device 1. It is a demerit that a part of the light of the light emitting element 3 stays in the lighting device 1 when the lighting device 1 needs to secure a sufficient amount of light emission.

  On the other hand, when the sealing frame 4 has the inclined surface 11, the light from the light emitting element 3 is output to the outside through the lens plate 6 while being reflected by the inclined surface 11 as indicated by an arrow 12 in FIG. 9. To do. That is, the light from the light emitting element 3 can be output to the outside of the lighting device 1 using the reflection on the inclined surface 11.

  Depending on the position where the plurality of light emitting elements 3 are arranged, most of the emitted light is directly transmitted through the sealing material 5 and the lens plate 6 and output to the outside. On the other hand, among the plurality of light emitting elements 3, a part of the light of the light emitting element 3 disposed close to the sealing frame 4 collides with the sealing frame 4. The inclined surface 11 can output the colliding light to the outside of the illumination device 1.

  Further, the light of the light emitting element 3 may be reflected by the adjacent light emitting element 3. The light reflected by the other light emitting elements 3 may also collide with the sealing frame 4. Light that has collided with the sealing frame 4 in this way is transmitted to the outside through the sealing material 5 and the lens plate 6 instead of the inside of the sealing material 5 by the inclined surface 11.

  Due to the inclined surface 11 provided in the sealing frame 4, most of the light from the plurality of light emitting elements 3 is output to the outside of the lighting device 1. As a result, the illuminating device 1 can irradiate light by fully utilizing the light emission capability that can be emitted by the plurality of light emitting elements 3. The lighting device 1 can realize irradiation with high luminance.

  The light emitted from each of the plurality of light emitting elements 3 is reflected on the side surface of the adjacent light emitting element 3 and output to the outside of the illumination device 1.

  An arrow 13 in FIG. 9 is light from the light emitting element 3 that is reflected on the side surface of the adjacent light emitting element 3. The side surfaces of the adjacent light emitting elements 3 reflect the light from the adjacent light emitting elements 3, so that most of the light from the light emitting elements 3 can be output to the outside of the lighting device 1. Also in this case, the illuminating device 1 can implement | achieve irradiation of the light using the light emission capability which the some light emitting element 3 can light-emit to the maximum.

  In addition, it is preferable that the plurality of light emitting elements 3 are arranged at a distance interval so that the light from the adjacent light emitting elements 3 can be reflected on the side surfaces thereof. For example, the interval between the adjacent light emitting elements 3 is set to be equal to or smaller than the size of the light emitting elements 3.

  As described above, the lighting device 1 according to Embodiment 2 can radiate light with high luminance to the outside by making the best use of the light emitting ability of the plurality of light emitting elements 3.

  (Embodiment 3)

  Next, the third embodiment will be described.

  In the third embodiment, the case where the sealing frame 4 includes a heat dissipation mechanism that releases heat from at least a part of the light emitting element 3 and the sealing material 5 will be described. This heat dissipation mechanism can efficiently release the heat conducted from the heat conducting member 50 to the sealing frame 4 to the outside.

  Since the sealing frame 4 is formed of a material having high thermal conductivity, the sealing frame 4 can release the heat conducted by itself to the outside. However, when the sealing frame 4 has only a shape surrounding the plurality of light emitting elements 3, the sealing frame 4 may not be able to sufficiently release heat. The heat dissipation mechanism promotes heat dissipation of the sealing frame 4.

  When current or voltage is applied to the light emitting element 3, the light emitting element 3 emits light. The illuminating device 1 is suitably used for a signal device and a fish collection lamp that require high luminance. For this reason, a high current value or voltage value is applied to the light emitting element 3. This is because the luminance of the light emitting element 3 is increased by a high current value or voltage value.

  Thus, when a high current value or voltage value is applied to the light emitting element 3, the light emitting element 3 generates high heat. This is because the light emitting element 3 changes a part of the applied current value or voltage value to heat energy. The light emitting element 3 generates high heat by this thermal energy.

  The lighting device 1 includes a sealing material 5 that seals the light emitting element 3, and part of heat generated by the light emitting element 3 is conducted to the sealing material 5 from the light emitting surface and side surfaces of the light emitting element 3. That is, the light emitting element 3 and the sealing material 5 have heat. If this heat becomes too high, the mounting of the light emitting element 3 is adversely affected, or the lighting device 1 is adversely affected. For example, the light emitting element 3 is unmounted or the light emitting element 3 itself fails.

  Heat from the light emitting surface and side surfaces of the light emitting element 3 is conducted to the sealing material 5. The sealing material 5 includes a heat conductive member 50, and the heat conductive member 50 receives heat inside the sealing material 5 (heat from at least a part of the light emitting element 3 and the sealing material 5). Further, the heat conducting member 50 conducts the received heat to the sealing frame 4.

  The heat dissipation mechanism of the sealing frame 4 efficiently releases the heat conducted to the sealing frame 4 to the outside. As a result, the failure and deterioration of the lighting device 1 can be prevented in advance.

  Although it is conceivable that the heat dissipation mechanism has various forms, an example is shown in FIG.

  FIG. 10 is a side view of the lighting apparatus according to Embodiment 3 of the present invention.

  As shown in FIG. 10, the sealing frame 4 includes radiating fins 20 and 21 on at least a part of the side surface and the surface thereof. Further, the heat conductive member 50 is in thermal contact with the sealing frame 4, and the heat conductive member 50 seals the heat inside the sealing material 5 (that is, heat from the light emitting surface and the side surface of the light emitting element 3). Conduct to frame 4. The radiation fins 20 and 21 release the heat conducted from the heat conducting member 50 to the sealing frame 4 to the outside.

  The radiating fins 20 protrude from the side surface of the sealing frame 4, and the radiating fins 21 protrude from the surface of the sealing frame 4. In FIG. 10, the radiation fins 20 and the radiation fins 21 are displayed. However, the actual lighting device 1 may include only one or both of the radiation fins 20 and the radiation fins 21. Also good. Further, the heat radiating fins 20 may protrude from at least a part of the side surface of the sealing frame 4.

  FIG. 11 shows the lighting device 1 shown in FIG. 10 as viewed from the front. FIG. 11 is a front view of the lighting apparatus according to Embodiment 3 of the present invention. The heat radiating fins 20 may protrude from both sides of the sealing frame 4 as shown in FIG. With such a shape, there is an advantage that the size and shape of the mounting substrate 2 can be reduced. Of course, the radiation fin 20 may be provided over the entire side surface of the sealing frame 4.

  The radiating fin 20 releases the heat conducted from the heat conducting member 50 to the sealing frame 4 to the outside. The sealing frame 4 covers the outer periphery of the sealing material 5, and the heat conducting member 50 has a lattice shape, so that the sealing frame 4 is thermally connected to the sealing frame 4 at many positions on the inner periphery of the sealing frame 4. Can touch. For this reason, the heat conduction member 50 can conduct the heat of the light emitting element 3 received from the sealing material 5 to the sealing frame 4 over a wide range.

  As a result, the sealing frame 4 and the radiation fins 20 and 21 can efficiently release heat to the outside. This is because there is little bias in heat conduction to the sealing frame 4. In particular, since heat from the heat conducting member 50 easily reaches the side surface of the sealing frame 4, the radiating fins 20 protruding from the side surface of the sealing frame 4 easily release heat to the outside.

  Since the heat radiation fin 20 has a large surface area, it can release heat by transferring heat from the surface to the outside. In addition, heat can be radiated to the outside by causing heat convection between the columnar members of the radiation fins 20. The radiating fin 20 can release heat to the outside by conduction and convection in this way. Moreover, the heat dissipation capability by the heat dissipation fin 20 is further enhanced by further providing a blower fan that sends air to the heat dissipation fin 20 as necessary.

  For this reason, the radiating fin 20 may be a rod-shaped member, a plate-shaped member, or a state in which these members are mixed.

  The heat radiating fins 21 protrude from the surface of the sealing frame 4.

  The radiating fin 21 protrudes from the sealing frame 4, thereby releasing heat reaching the surface of the sealing frame 4 and releasing heat conducted from the side surface of the sealing frame 4 to the surface. Since the sealing frame 4 surrounds the periphery of the plurality of light emitting elements 3, the amount of heat conducted to the side surface of the sealing frame 4 is large. For this reason, although the heat dissipation effect by the radiation fin 20 protruding from the side surface is high, the radiation fin 21 protruding from the surface tends to cause convection between the members forming the radiation fin.

  By this convection, the heat radiating fins 21 can efficiently release the heat conducted from the heat conducting member 50.

  As described above, the radiation fin 20 protruding from the side surface of the sealing frame 4 and the radiation fin 21 protruding from the surface of the sealing frame 4 are provided in combination, so that at least one of the light emitting element 3 and the sealing material 5 is provided. The heat from the part is released efficiently. The radiating fins 21 may be rod-like members or plate-like members.

  Further, at least a part of the radiating fins 20 and the radiating fins 21 may be formed integrally with the sealing frame 4. It is because the heat resistance at the time of the heat conduction from the sealing frame 4 to the radiation fins 20 and 21 becomes small by forming integrally, and the heat | fever discharge | release efficiency by the radiation fins 20 and 21 increases.

  Of course, at least a part of the radiation fins 20 and the radiation fins 21 may be formed separately from the sealing frame 4. This is because the manufacturing cost is reduced.

  As described above, the sealing frame 4 can release heat conducted from the heat conducting member 50 by including the heat radiation mechanisms such as the heat radiation fins 20 and the heat radiation fins 21. As a result, the problem of heat generation in the light emitting element 3 and the lighting device 1 itself is solved, and the lighting device 1 can apply a high current value and voltage value to the light emitting element 3 to realize irradiation with higher luminance. it can.

  Such an illuminating device 1 is optimally applied to a signal device, a construction lighting machine, and a fish collection lamp that require high luminance.

  In addition, although the heat radiating fins 20 and 21 are examples of the heat radiating mechanism, the heat radiating mechanism includes a liquid cooling mechanism, a forced air cooling mechanism, and the like other than the heat radiating fins.

  (Embodiment 4)

  Next, Embodiment 4 will be described with reference to FIG.

  In the fourth embodiment, the signal device 30 includes the lighting device 1 described in the first to third embodiments, a housing 32 that stores the lighting device 1, and a power supply unit 31 that supplies power to the lighting device 1. Will be described.

  FIG. 12 is a block diagram of signal device 30 according to the fourth embodiment of the present invention. FIG. 12 schematically illustrates a state in which the lighting device 1 is stored in the housing 32.

  The lighting device 1 is stored in the housing 32 and also receives power from the power supply unit 31. The power supply unit 31 has a control function of giving a predetermined current value or voltage value to the light emitting element 3 in accordance with a function of supplying power such as a battery or a storage battery. The light emitting element 3 emits light in response to the power from the power supply unit 31, and the lighting device 1 irradiates the outside with the sealing frame 4, the sealing material 5, and the lens plate 6. Of course, when the lens plate 6 is not used, the illumination device 1 irradiates the light of the light emitting element 3 to the outside by the sealing frame 4 and the sealing material 5.

  In addition, a heat conducting member 50 is provided inside the sealing material 5, receives heat transmitted from the light emitting surface or side surface of the light emitting element 3 to the sealing material 5, and conducts it to the sealing frame 4.

  The light emitting element 3 can emit light with a light emission pattern corresponding to a change pattern of power supplied from the power supply unit 31. By such control by the power supply unit 31, the lighting device 1 can irradiate the outside with various light emission patterns. Moreover, since the illuminating device 1 is manufactured at low cost as demonstrated in Embodiment 1-3, the cost of the signal apparatus 30 can also be reduced. In particular, since the sealing and condensing control of the plurality of light emitting elements 3 are integrally performed, variations among the light emitting elements 3 are reduced, and light emission in the entire lighting device 1 is optimally controlled.

  In addition, since heat from the light emitting surface and side surfaces of the light emitting element 3 is released to the outside through the heat conducting member 50, heat generation is suppressed. In addition, the heat dissipation mechanism provided in the sealing frame 4 further promotes heat dissipation to the outside. As a result, since a high current value and voltage value can be given to the light emitting element 3, the lighting device 1 can irradiate light with high luminance.

  Since the light emission of the entire lighting device 1 can be controlled integrally, the signal device 30 can form an optimal light emission pattern. As a matter of course, since the light can be emitted with high luminance, the signal device 30 is applied to various uses.

  As described above, the lighting device and the signal device described in the first to fourth embodiments are examples for explaining the gist of the present invention, and include modifications and alterations without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 1 Illuminating device 2 Mounting board 3 Light emitting element 4 Sealing frame 5 Sealing material 6 Lens board 10 Space | gap 11 Inclination 12, 13 Arrow 20, 21 Radiation fin 30 Signal apparatus 31 Power supply part 32 Case 50 Thermal conduction member

Claims (17)

A mounting board;
A plurality of light emitting elements mounted in a bare chip state on the mounting substrate;
A sealing frame provided on the mounting substrate and surrounding the periphery of the plurality of light emitting elements;
A sealing material that fills the inside of the sealing frame and seals the light emitting element while being in contact with the light emitting element;
A heat conduction member that is provided inside the encapsulant and conducts heat from at least a part of the light emitting element and the encapsulant, and
The sealing material is transparent or translucent and the upper surface has at least one of a concave shape and a convex shape,
The sealing material performs at least one of diffusion and collection of light emitted from the light emitting element,
The heat conduction member conducts heat to the sealing frame, and the sealing frame discharges heat conducted to the outside. A lens plate laminated on the upper layer of the sealing material;
The sealing material and the lens plate are transparent or translucent,
The lighting device according to claim 1, wherein the sealing material and the lens plate are laminated to perform at least one of diffusing and condensing light emitted from the light emitting element.   The lighting device according to claim 1, wherein at least one of a height and an area of the sealing frame is determined according to the number of the light emitting elements.   The lighting device according to claim 1, wherein the lens plate is a convex lens, and a laminated surface of the sealing material with the lens plate is concave.   4. The lighting device according to claim 1, wherein the lens plate is a concave lens, and a laminated surface of the sealing material with the lens plate has a convex shape.   The lighting device according to any one of claims 1 to 5, wherein a laminated surface of the sealing material and the lens plate has a gap.   The lighting device according to claim 1, wherein at least part of the transmittance and the refractive index of each of the sealing material and the lens plate is different.   The lighting device according to claim 1, wherein a side surface of the sealing frame has an inclined surface that is inclined from a lens plate side to a mounting substrate side, and the inclined surface reflects light of the light emitting element.   The lighting device according to claim 1, wherein each light of the plurality of light emitting elements is reflected by a side surface of the adjacent light emitting element.   The lighting device according to claim 1, wherein the heat conducting member has a lattice shape formed of a heat conductive material.   The lighting device according to claim 10, wherein the heat conducting member has a mesh shape made of metal or alloy.   The lighting device according to claim 1, wherein the heat conducting member is in thermal contact with the sealing frame.   The lighting device according to claim 1, wherein the sealing frame further includes a heat dissipation mechanism that releases heat from the heat conducting member.   The lighting device according to claim 13, wherein the heat dissipation mechanism includes a heat dissipation fin provided on at least a part of a surface and a side surface of the sealing frame.   The lighting device according to claim 14, wherein the heat radiation fin is formed integrally with the sealing frame.   The lighting device according to claim 13, wherein the heat conducting member and the heat dissipation mechanism release heat generated by the light emitting element on a light emitting surface to the outside. The lighting device according to any one of claims 1 to 16,
A housing for storing the lighting device;
A power supply unit for supplying power to the lighting device,
The light emitting element is a signal device that emits light with high luminance.