JP2007036132A - Field light emitting module and field light emitting device using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a subjacent type field light emitting module capable of easily configuring field light emitting devices of various scales and shapes without changing the design of a drive section in accordance with a power supply capacity and a field light emitting device using the same. <P>SOLUTION: The field light emitting module 1 is provided with a plurality of LED's 2, a silicone 3 that seals a plurality of the LED's 2, wiring 4 for connecting the LED's 2, a substrate 5 that mounts a plurality of the LED's 2, a support member 6 that loads a plurality of the substrates 5 and reflects light emitted from a plurality of the LED's 2, and the drive section 7 that supplies current and signals for driving the LED's 2. An enlarged field light source of various scales and shapes can be easily configured by combining a plurality of the field light emitting modules 1. The power supply capacity of each drive section does not vary with the size of a device if enlarged because the drive section 7 is provided at each field light emitting module. Further, electric power-saving can be attained by arranging a configuration such that the LED's are connected in series to operate the device at a fixed current drive. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a surface light emitting module using a light emitting diode (LED) as a light source and a surface light emitting device using the same, and in particular, by combining a plurality of modules, it can be used for the scale and application of the surface light emitting device. The present invention relates to a surface light emitting module and a surface light emitting device using the surface light emitting module that can be designed with a high degree of design freedom, are thin and light, and have high environmental safety.

  Conventionally, fluorescent lamps and neon tubes have been widely used as light sources used in large light-emitting display devices such as store lighting devices and signboards. However, fluorescent lamps are harmful because they use mercury, and have various problems such as requiring appropriate treatment as industrial waste. In addition, fluorescent lamps and neon tubes have short lifetimes and high running costs.

  In addition, when using fluorescent lamps or neon tubes for display devices such as store lighting devices or signboards, a high scaffold is assembled during initial installation or maintenance such as repair or replacement, and the light emitting device is powered. It is necessary to work after cutting. Fluorescent lamps and neon tubes have a short life and frequent maintenance, which increases the burden on the user.

  In recent years, there has been an increasing demand for thinner surface emitting devices installed outdoors in order to comply with the regulations of laws and regulations concerning buildings or structures on public roads.

  As a solution to such a problem, a surface light emitting device using an LED as a light source has been proposed. Since LEDs are manufactured based on semiconductor manufacturing technology, they have features that are excellent in mass productivity and cost saving. Furthermore, LEDs have a long life, and at present, products that can withstand about 70,000 hours of use have been put into practical use.

  For this reason, attempts have been made to use LEDs as light sources of light-emitting display devices. For example, a signboard device including light-emitting diodes provided in a plurality of zones as light sources has been proposed (see Patent Document 1). In addition, a surface-emitting display device including a plurality of LED units in which a series of LEDs are covered with a diffusing lens has been proposed (see Patent Document 2).

  According to the signboard device of Patent Document 1, the light emitting diodes provided in the first LED zone and the second LED zone are inserted into the through holes of the fixed board and fixed in place, and the LED light source on the wiring board is turned on. Further, the signboard body does not necessarily have to be formed integrally, and a single character can be formed by combining a plurality of character parts.

According to the surface light emitting display device of Patent Document 2, a plurality of LEDs are arranged on an LED substrate, a diffusion lens that covers the plurality of LEDs, and a reflector on the back surface of an extension portion that extends upward from the arc end of the diffusion lens. A plurality of the provided LED units are provided in the frame-like case.
Japanese Patent Laying-Open No. 2003-66880 (paragraphs 0010 and 0015, FIG. 3) JP 2005-17573 A (paragraph 0013, FIG. 2, FIG. 5)

  However, according to the signboard device of Patent Document 1, the shape and size of the surface light emitting unit including the first and second LED zones can be freely changed, but the power supply capacity of the driving unit varies depending on the size of the LED zone. Therefore, it is necessary to newly design the power supply and the power supply drive unit.

  Moreover, according to the surface emitting module of patent document 2, although uniform light can be irradiated toward a display board using a LED light-emitting body, the length of an LED unit is matched with the horizontal length of a case. In addition, it is necessary to change the length of the extension portion including the reflection portion according to the length of the case in the vertical direction.

  Accordingly, an object of the present invention is to arrange a plurality of light source modules each having a surface shape and each having a drive unit, thereby allowing various scales and shapes without changing the design of the drive unit according to the power supply capacity. It is an object of the present invention to provide a direct-type surface light emitting module and a surface light emitting device using the same that can easily constitute the surface light emitting device.

  In order to achieve the above object, the present invention provides a plurality of LEDs, a first support member provided with the plurality of LEDs, and a drive unit that is supplied with current from an external power source and drives the plurality of LEDs. There is provided a surface emitting module having a reflection surface provided on the back surface of the LED and reflecting light emitted from the LED.

  The first support member may be formed integrally with the reflective surface and configured to reflect light emitted from the back surface of the LED.

  You may comprise the said drive part so that it may be incorporated in the said surface emitting module. Further, the driving unit includes a power input unit that inputs an alternating current from the external power source, a rectifying unit that rectifies the alternating current into a direct current, and the plurality of the plurality of DC currents that are supplied from the rectifying unit. It can comprise so that it may consist of a constant current part which drives LED.

  Preferably, the surface-emitting module further includes a board on which the plurality of LEDs are mounted, a wiring provided on the first support member, and connecting the plurality of LEDs to the driving unit. The member mounts the substrate, and the joint between the substrate and the plurality of LEDs is sealed with resin. The first support member may have a groove for mounting the substrate. Furthermore, the groove may be covered with a protective member for each single or plural rows.

  Preferably, each of the surface emitting modules includes a plurality of surface emitting units each including a substrate on which the plurality of LEDs are mounted and a second supporting member on which the substrate is mounted, and the first supporting member and the second supporting member. And a wiring for connecting the plurality of LEDs to the driving unit. The surface emitting module may further include a light-transmitting cover member that covers the plurality of LEDs and is joined to the second support member.

  Preferably, each of the surface-emitting modules includes a plurality of substrates each including one of the plurality of LEDs and a housing on which the substrate is mounted and a joint portion between the LEDs and the substrate is sealed with a resin. It consists of an LED unit and a cable connecting the drive unit and the plurality of LED units. The first support member may include a recess for mounting the LED unit. Further, the concave portion may be formed in a protruding portion provided in the first support member.

  Preferably, the surface emitting module further includes a diffusing member that diffuses the emitted light of the LED and the reflected light of the reflecting surface. The diffusion member may be provided as a common member for the plurality of surface emitting modules.

  In order to achieve the above object, the present invention includes a diffusion plate and a light emitting plate disposed on the back side of the diffusion plate, and the light emitting plate is configured by a plurality of surface-emitting modules having the same shape. Each of the surface light emitting modules provides a surface light emitting device including a light emitting unit composed of a plurality of LEDs and a drive unit for driving the light emitting unit.

  According to the present invention, it is possible to easily configure surface emitting modules for illumination / display of various scales and shapes and surface emitting devices using the same without changing the design of the drive unit according to the power supply capacity. .

(First embodiment)
FIG. 1 is a perspective view of a direct-type surface emitting module according to the first embodiment of the present invention.

(Overall configuration of surface emitting module 1)
The surface emitting module 1 includes a plurality of LEDs 2, a silicone (silicon resin) 3 that seals the plurality of LEDs 2, a substrate 5 on which the plurality of LEDs 2 are mounted, a plurality of substrates 5, and radiation from the plurality of LEDs 2. A driving member 7 that supplies current and signals for driving the LED 2, and a cover member 8 that covers and protects the substrate 5 and the driving unit 7.

  The LED 2 is a mounting type LED 2 that uses a white LED or an LED element such as a red (R), green (G), and blue (B) LED as a light emission source. It is mounted on.

  The support member 6 is a flat plate member formed by molding a resin material such as plastic or processing a metal, and also serves as a reflector for enhancing the reflectivity of light emitted from the LED 2. In a so-called direct type LED light emitting device, a reflecting plate or a reflecting surface is formed on the back surface of the LED 2. In the present embodiment, in order to provide the function of the reflecting plate, the supporting member 6 and the reflecting surface are integrally formed by forming the supporting member 6 with a white resin or painting it in white. Further, a reflecting plate or a reflecting surface may be further provided on the surface of the support member 6.

  The substrate 5 is made of a material such as glass epoxy or resin, has a wiring 4 electrically connected to an electrode terminal portion exposed on the bottom surface of the LED 2, and a plurality of LEDs 2 are mounted at a predetermined interval. .

  The support member 6 mounts the board | substrate 5 which mounts several LED2, The space | interval of the board | substrate 5 can be arbitrarily defined so that a desired shape may be provided. In this Embodiment, it sets so that the space | interval of the vertical direction and horizontal direction of several LED2 may become fixed. In the present embodiment, the shape of the support member 6 is a rectangle having a length of 350 mm and a width of 500 mm, and the LEDs 2 are mounted so that the intervals in the vertical direction and the horizontal direction are about 50 mm, respectively.

  When the surface light emitting module 1 is used in, for example, a surface light emitting device, a plurality of light emitting modules 1 can be combined in accordance with the use of the surface light emitting device, the installation location, and the like to obtain a desired shape and scale. The size of the surface light emitting device can be about several hundred mm to several meters in the vertical direction, several hundred mm to several meters in the horizontal direction, and about 80 mm to 100 mm in depth.

  FIG. 2 is a cross-sectional view showing the configuration of the surface emitting module 1 according to the first embodiment of the present invention.

(Configuration of surface emitting module 1)
As shown in FIG. 2, the LED 2 is mounted on a substrate 5, and the substrate 5 is further mounted on a support member 6. The support member 6 has a plurality of grooves (concave portions) 6 </ b> A for housing the plurality of LEDs 2 mounted on the substrate 5. In the present embodiment, the groove 6A is provided along the vertical direction of the surface light emitting module 1, but may be provided along the horizontal direction. The plurality of LEDs 2 mounted on the support member 6 are connected in series by the wiring 4 provided on the substrate 5 and the support member 6 as illustrated on the right side of the surface emitting module 1 in FIG. It is connected.

  In the present embodiment, the support member 6 serves as a member for supporting the LED 2 and fixing the surface emitting module 1 and a reflector for enhancing the reflectivity of the light emitted from the LED 2. The surface emitting module 1 can fix the supporting member 6 to the chassis 13 provided between the front plate 11 and the back plate 12 using screws, fittings, or the like.

(Configuration of the surface light emitting device 10 using the surface light emitting module 1)
FIG. 3 is a cross-sectional view of a surface light emitting device 10 configured using the surface light emitting module 1.

  When assembling the surface light emitting device 10, first, one or a plurality of surface light emitting modules 1 are fixed to the chassis 13 attached to the back surface plate 12, and then the front plate 11 made of resin (for example, acrylic) is faced. The light emitting module 1 is separated from the light emitting module 1 by about 50 millimeters and attached so as to cover the entire surface of the plurality of surface light emitting modules 1. When the LED 2 is turned on, the light from the LED 2 is emitted toward the front plate 11, and the light reflected by the support member 6 provided on the back surface of the LED 2 is directed toward the front plate 11. The front plate 11 diffuses the radiated light from the LED 2 and the reflected light from the support member 6, so that uniform and uniform light emission can be obtained.

  A surface light-emitting device using the surface light-emitting module 1 can be used as a display device, a lighting device, or the like. Further, the distance between the front plate 11 and the support member 6 is set to about 50 mm so that a desired luminance can be obtained as a surface emitting device for illumination and display. Further, in order to achieve a reduction in the thickness of the entire surface light emitting device, the distance between the front plate 11 and the back plate 12 is set to about 80 mm.

(Connection structure of a plurality of surface emitting modules 1)
FIG. 4 is a cross-sectional view of a structure in which a plurality of surface emitting modules 1 are connected using the chassis 13.

  As shown in FIG. 4, screw holes are provided in the end portion of the support member 6 and the chassis 13, and the support member 6 is fixed to the chassis 13 with screws 14. A surface-emitting light source having a shape can be obtained. However, the connection method of a plurality of surface emitting modules is not limited to the connection by screwing through the chassis 13, but a fitting portion is provided at the end of the chassis 13 and the support member 6, or the surface emitting modules 1 are directly connected to each other. You may comprise so that it may connect by screwing or a fitting.

  FIG. 5 is a perspective view showing a sealed state of the LED 2 and the substrate 5 shown in FIG.

  As shown in FIGS. 2 and 5, the substrate 5 on which the LEDs 2 are mounted is housed in the groove 6 </ b> A formed in the support member 6, and the space between the plurality of LEDs 2 is covered with a cover member 8. As illustrated in the lower side of FIG. 5, the gap between the cover member 8 and the support member 6 and the mounting surface of the substrate 5 are sealed with silicone 3 to achieve waterproofing and drip-proofing. Thereby, it can be set as a waterproof and drip-proof structure in the unit of each surface emitting module 1.

(Modification of support member 6 and cover member 8)
6A and 6B show a modification of the support member 6 and the cover member 8 of the surface emitting module 1 according to the first embodiment. FIG. 6A is a perspective view of the modification, and FIG. FIG.

  In FIG. 6A, the support member 6 is provided with a groove 6A for housing a plurality of LEDs 2 along the vertical direction and the horizontal direction of the surface emitting module. The cover member 8 is configured to cover a plurality (two rows in the present modification) of the groove portions 6A. The cover member 8 is provided with a plurality of openings corresponding to the plurality of LEDs 2, and is further fixed by screws 14A.

  FIG. 6B is an enlarged cross-sectional view of a central portion surrounded by a broken line in the surface emitting module 1 shown in FIG. A stepped portion is provided on the outer periphery of the plurality of groove portions 6A of the support member 6 so that the cover member 8 covers the entirety of the plurality of groove portions 6A, and further, the shape of the cover member 8 corresponding to the stepped portion on the outer periphery. Is determined. The gap between the outer peripheral stepped portion and the cover member 8 is sealed with silicone 3 to achieve a waterproof / drip-proof structure. According to the said structure, the location which needs resin sealing can be reduced and the quantity of the silicone 3 can be reduced.

(Configuration of the drive unit 7)
FIG. 7 is a block diagram illustrating a configuration of the driving unit 7 of the surface emitting module 1.

  Each of the surface emitting modules 1 is provided with a driving unit 7, and the driving unit 7 is connected to an LED unit 20 including a plurality of LEDs 2 connected in series and a power source 77 provided outside the surface emitting module 1. In the present embodiment, the drive unit 7 is connected to a power source 77 to input an AC current, an input unit 71, a rectifier 72 to rectify the AC current into a DC current, and the rectified DC current to the LED unit 20 A constant current unit 73 for driving the LED unit 20, a switch 74 for controlling the operation of the constant current unit 73, a sensor 75 connected to the switch 74 for sensing ambient brightness, and It consists of a timer 76 for measuring time.

(Operation of the drive unit 7)
The operation of the drive unit 7 is as follows. An alternating current is supplied to the input unit 71 from an alternating current power source 77 (for example, AC 100V power source), an alternating current is supplied from the input unit 71 to the rectifying unit 72, and the rectifying unit 72 rectifies the alternating current into a direct current. A direct current is supplied to the constant current unit 73 connected to. The constant current unit 73 is controlled by a switch 74, and controls the LED unit 20 by changing the amount of current supplied to the LED unit 20, in particular, dimming.

  The brightness of the LED unit 20 is controlled to 0% to 100% by the switch 74. The sensor 75 connected to the switch 74 senses ambient brightness, and when the surrounding becomes darker than the predetermined brightness, the switch 74 is turned on to turn on the LED unit 20, and the surrounding from the predetermined brightness. When it becomes bright, the switch 74 is turned off to turn off the LED unit 20. In addition, the timer 76 is used to reduce the amount of current to be supplied and reduce the light emission amount of the LED unit 20 at a predetermined time, for example, midnight.

  Here, as shown in FIGS. 1 and 2, the drive unit 7 is provided with an opening in the vertical direction in the center of the support member 6 and accommodated, and is covered with a cover member 8. Further, the drive unit 7 may be built in another part of the surface emitting module 1. Since each of the surface emitting modules 1 is provided with a driving unit 7 and connected to an external power source, the power source capacity of the driving unit 7 does not change even when the surface light source is enlarged. For this reason, each drive part 7 can be reduced in size. Even if the drive unit 7 is configured to be built in the surface light emitting module 1, the surface light emitting module 1 can emit light entirely because the drive unit 7 is small.

(Effects of the first embodiment)
According to the first embodiment described above, large surface light sources of various scales and shapes can be easily configured by arranging and fixing a plurality of surface light emitting modules vertically and horizontally. Moreover, since the drive part is provided in each of several surface emitting module, the electrical connection of the whole surface emitting apparatus is easy, and a design freedom is high. Moreover, even if the scale of the entire surface light emitting device is increased, since the drive units are dispersed in the modules, the power capacity of each drive unit does not change. For this reason, it is not necessary to design a drive part specially, and a drive part main body can be reduced in size. Furthermore, power saving can be achieved by connecting LEDs in series and driving them at a constant current using an AC power supply.

(Second Embodiment)
FIG. 8 is a perspective view of a surface emitting module according to the second embodiment. 9 is an exploded perspective view of the surface emitting unit 1A included in the surface emitting module, and FIG. 10 is an enlarged cross-sectional view of the surface emitting unit 1A.

  In the following description, parts having the same configuration and function as those of the first embodiment are denoted by common reference numerals.

  In the first embodiment, the substrate 5 on which the plurality of LEDs 2 are mounted is mounted in the groove 6A of the support member 6. However, in the present embodiment, as shown in FIG. A plurality of elongated surface emitting units 1A are further provided on the supporting member 6.

  As shown in FIG. 9, each of the surface light emitting units 1 </ b> A includes a substrate 5 on which a plurality of LEDs 2 are mounted on a long support member 61 independent of the support member 6, and is attached to both ends of the surface light emitting unit 1 </ b> A. Is provided with a cap 15 for facilitating protection of the end portion and waterproofing and drip-proofing. In order to protect the LED 2, a transparent cover 16 made of a transparent resin and having a polygonal or semicircular cross section is provided on a long support member 61. As shown in FIG. 10, the joint between the transparent cover 16 and the long support member 61 is sealed with silicone 3 for waterproofing and drip-proofing. By using the transparent cover 16, the amount of silicone 3 used for sealing can be reduced. Further, the cap 15 may be provided with a notch corresponding to the end surface of the transparent cover 16, and the transparent cover 16 may be fixed to the long support member 61 by the cap 15.

  The plurality of surface light emitting units 1 </ b> A may be configured to be detachable from the support member 6. Further, by providing the wiring 4 on the cap 15, the support member 6, and the long support member 61, the LEDs 2 mounted on the plurality of surface emitting units 1 </ b> A are connected in series and connected to the drive unit 7.

(Effect of the second embodiment)
According to the second embodiment described above, large surface light sources of various scales and shapes can be easily configured. In addition, since the surface light emitting module is provided with a drive unit, electrical connection of the entire surface light emitting device is easy, and design flexibility is high. Moreover, even if the scale of the entire surface light emitting device is increased, the power capacity of each drive unit does not change. For this reason, it is not necessary to design a drive part specially, and a drive part main body can be reduced in size. Furthermore, since the surface emitting units are connected in series, power saving can be achieved by constant current driving.

  In addition, by adopting a configuration including a plurality of surface light emitting units to which the surface light emitting module can be attached and detached, even if a failure occurs in one LED, only the surface light emitting unit on which the defective LED is mounted. It is possible to easily perform maintenance by exchanging. In addition, the LED can be protected by providing a transparent cover, and the amount of silicone used for resin sealing can be reduced. Further, the long surface light emitting unit in which the long support member is covered with a transparent cover and the end portion is protected with a cap has an advantage that the shape is similar to a conventional fluorescent lamp and is easy to handle.

(Third embodiment)
FIG. 11 is a perspective view of the surface emitting module 1 according to the third embodiment. 12 shows the LED unit 2B included in the surface emitting module 1, (A) is a perspective view of a plurality of LED units 2B, and (B) is an enlarged perspective view of the LED unit 2B.

  In the following description, parts having the same configuration and function as those of the first embodiment are denoted by common reference numerals.

  In the first embodiment, a configuration is adopted in which the substrate 5 on which a plurality of LEDs 2 are mounted is mounted in the groove 6A of the support member 6, but in this embodiment, as shown in FIG. The plurality of LED units 2 </ b> B thus taken are accommodated in the surface light emitting device 10.

  As shown in FIG. 12A, the surface emitting module 1 includes a plurality of LED units 2B connected by a cable 18 and a drive unit 7 (not shown) connected to the LED unit 2B. In the present embodiment, the plurality of LED units 2B are connected in series, but may be configured to be connected in parallel. Further, since the plurality of LED units 2B of the present embodiment can be arranged flexibly, they can be used regardless of the scale and shape of the surface light emitting device. For example, when used for a character signboard that conventionally used a neon tube, a plurality of LED units 2B are arranged in accordance with the shape of the character, and screws and adhesives are attached to the inner surface of the casing of the surface light emitting device. It can be fixed with an agent or double-sided tape.

  In the LED unit 2B, as shown in FIG. 12B, the LED 2 is mounted on the substrate 5 and mounted on the cover 17 made of a white plastic casing, and then the joint portion of the LED 2 and the cover 17 is made of silicone 3. It is sealed. Further, an opening is provided on the side surface of the cover 17, and the cable 18 is connected to the LED 2 through the opening. Furthermore, a screwing portion 14B is provided on the side surface of the cover 17 in order to fix the LED unit 2B with a screw. Further, in order to reflect the emitted light of the LED 2, a reflection plate may be further provided on the back surface of the cover 17.

(Configuration of surface light emitting device 10)
FIG. 13 shows an example of a surface light-emitting device 10 configured using the surface light-emitting module 1 according to the third embodiment, (A) is a sectional view of the surface light-emitting device, and (B) is a support member. 6 is a perspective view of the recess 6C of FIG. 6, and FIG. In FIGS. 13A to 13C, the screwing portion 14B is omitted.

  FIG. 13A shows an example of a surface light-emitting device 10 configured by using the surface light-emitting module 1 according to the third embodiment.

  When assembling the surface light emitting device 10 according to the present embodiment, first, as shown in FIG. 13B, the plurality of LED units 2 </ b> B are fixed to the support member 6. Here, the support member 6 is formed integrally with the back plate 12 in the first embodiment, and also functions as the support member 6, the back plate 12 and the chassis 13.

  Here, as shown in FIG. 13C, in order to fix the plurality of LED units 2B, the support member 6 is provided with a recess 6C for accommodating the LED units 2B. The shape of the recess 6C is determined corresponding to the shape of the LED unit 2B. Further, the support member 6 may be provided with a groove for accommodating the cable 18. Here, the plurality of LED units 2 </ b> B are flexibly connected, the cable 18 is free to handle, and it is not necessary to provide the wiring 4 on the support member 6. Therefore, the recess 6 </ b> C can be provided on the support member 6 in an arbitrary shape. it can. For example, the concave portions 6C can be arranged linearly or curvedly, and can be arranged not only in the vertical direction and the horizontal direction, but also in a radial shape, a concentric shape, and the like.

  Next, the resin-made (for example, acrylic) front plate 11 is separated from the surface light emitting module 1 by about 50 millimeters, and attached so as to cover the entire surface light emitting module 1. In the present embodiment, the surface light emitting device 10 can be further reduced in thickness by not providing the back plate 12 and the chassis 13. Furthermore, since the LED unit 2B is waterproofed and drip-proofed as a single unit, it is not necessary to apply waterproofing and drip-proofing to the entire surface light emitting module 1.

(Modification of support member 6)
FIG. 14 shows a modification of the supporting member 6 of the surface emitting module 1 according to the third embodiment, (A) is a sectional view of the surface emitting device, and (B) is a protruding portion 6B of the supporting member 6. And FIG. 6C is a perspective view of the recess 6C, and FIG. In FIGS. 14A to 14C, the screwing portion 14B is omitted.

  The surface emitting module 1 shown in FIG. 14 is different from the surface emitting module 1 of FIG. 13 in the structure and shape of the support member 6. As shown in FIGS. 14A to 14C, the recess 6 </ b> C for housing the LED unit 2 </ b> B is formed in the protruding portion 6 </ b> B provided on the support member 6. In FIG.14 (c), although the bottom face of the protrusion part 6B is comprised so that it may become higher than the surface of a supporting member, you may be the same as the surface of a supporting member, or it may be lower than it. By changing the height of the bottom surface of the protruding portion 6B, the distance between the front plate 11 and the light emitting surface of the LED unit can be arbitrarily changed without changing the external dimensions of the housing of the surface light emitting device 10. it can. Moreover, the shape of the protrusion part 6B and the recessed part 6C can be determined arbitrarily.

(Modification of LED unit 2B)
FIG. 15 shows a modification of the LED unit 2B of the surface emitting module 1 according to the third embodiment, (A) is a perspective view of the modification, and (B) is a sectional view thereof.

  In FIG. 15 (A), the LED unit 2B mounts the LED 2 on the substrate 5 and mounts the LED 2 on the upper cover 17A and the lower cover 17B which constitute a single housing, and the joint portion between the LED 2 and the upper cover 17A. Sealed with silicone 3. Further, as shown in FIG. 15B, the cable 18 connected to the substrate 5 through the opening of the lower cover 17B is provided with a silicone sealing portion 3A, between the lower cover 17B and the substrate 5. Is provided with a silicone plate 3B. According to this structure, the waterproof / drip-proof function of the LED unit 2B can be further enhanced.

(Other variations of LED unit 2B)
FIG. 16 shows another modification of the LED unit 2B of the surface emitting module 1 according to the third embodiment, (A) is a perspective view of the modification, and (B) is a sectional view thereof.

  The LED unit 2B shown in FIG. 16 differs from the LED unit 2B shown in FIG. 15 in the sealing structure, particularly in the structure and shape of the upper cover 17A. As shown in FIGS. 16A and 16B, the upper cover 17A of the LED unit 2B includes a hemispherical dome portion 17C at the center. Further, the upper cover 17A and the dome portion 17C are formed of a light-transmitting material, for example, a transparent resin so as to transmit the light emitted from the LED 2 and the reflected light. In order to perform sealing for waterproofing and drip-proofing, the upper cover 17A provided with the dome portion 17C is mounted on the lower cover 17B, and the joint between the upper cover 17A and the lower cover 17B is sealed with silicone 3. According to this structure, the waterproof / drip-proof function of the LED unit 2B can be further enhanced while protecting the LED 2 from impact or the like. Furthermore, the amount of silicone 3 used for resin sealing can be reduced by providing the dome portion 17C.

(Effect of the third embodiment)
According to the third embodiment described above, the surface light emitting module can be used for a surface light emitting device of any shape and scale by including a plurality of LED units that are flexibly connected. There is an advantage that handling becomes easy. Furthermore, since the drive unit is provided in the surface light emitting module, electrical connection of the entire surface light emitting device is easy, and design flexibility is high. Moreover, even if the scale of the entire surface light emitting device is increased, the power capacity of each drive unit does not change. For this reason, it is not necessary to design a drive part specially, and a drive part main body can be reduced in size. Furthermore, since a plurality of LED units are connected in series, power saving can be achieved by constant current driving.

  Further, by providing a recess in the support member and accommodating a plurality of LED units, the apparatus can be thinned and the LED units can be freely arranged. Moreover, the space | interval of a light emission surface and a front plate can be arbitrarily changed by forming a recessed part in the protrusion part provided in the supporting member, and changing the height of the bottom face of a protrusion part. Further, by applying waterproof / drip-proof processing to each LED unit, it becomes unnecessary to perform waterproof / drip-proof processing on the entire surface light emitting module. Moreover, by providing the dome portion on the cover of the LED unit, the LED can be protected and the amount of resin used for sealing can be reduced.

  As mentioned above, although the surface emitting module and the surface emitting apparatus of this invention were demonstrated based on said embodiment, this invention is not limited to said embodiment, In the range which does not deviate from the summary, it is various. For example, the following modifications are possible.

  (1) In the present embodiment, the plurality of LEDs 2 are connected in series, but the present invention is not limited to this, and may be connected in parallel.

  (2) In the present embodiment, the front plate 11 is a diffusing member for the emitted light of the LED 2 and the reflected light from the reflecting surface. However, the present invention is not limited to this, and the surface emitting module 1 includes the diffusing member. It is good. Moreover, it is good also as a structure which provides one diffusion member with respect to several surface emitting module. Furthermore, although the front plate 11 is formed of an acrylic resin, the present invention is not limited to this, and other materials such as glass and resin may be used.

  (3) In the present embodiment, the power source 77 of the surface emitting module 1 is an AC power supply of AC100V, but the present invention is not limited to this, and may be an AC power supply of AC110V, AC220V or the like.

  (4) In the present embodiment, an AC power source is used as the power source 77, but the present invention is not limited to this, and a DC power source may be used. When a DC power source is used as the power source 77, the LEDs 2 of the LED unit 20 can be connected in parallel.

  (5) In the present embodiment, the LED unit 20 is driven with a constant current by the constant current unit 73. However, the present invention is not limited to this, and a resistor connection may be used, and dimming may be performed with a chopper.

  (6) In the present embodiment, the switch 74, the sensor 75, and the timer 76 are provided inside the surface emitting module 1, but the present invention is not limited to this, and is provided outside the surface emitting module 1. May be. Other external signal input means may be provided. The driving of the plurality of surface emitting modules 1 can be simultaneously controlled by inputting signals from the outside to the driving units 7 of the plurality of surface emitting modules 1.

  (7) In the present embodiment, the rectifying unit 72 is configured to rectify the alternating current supplied from the input unit 71 into a direct current, but the present invention is not limited to this and is supplied from the input unit 71. The AC current may be stepped down and rectified to direct current, and may be further stepped down and rectified using a switching regulator.

  (8) In the present embodiment, the transparent cover 16 provided in the surface light emitting unit 1A is formed from a transparent resin. However, the present invention is not limited to this, and the cover 16 may be milky white other than transparent or Other colors may be used. Moreover, the cover 16 may be formed from materials, such as glass other than resin. Furthermore, the transparent cover 16 may have a lens function to control the emitted light and reflected light (for example, ensuring the directivity of light).

  (9) In the present embodiment, the dome portion 17C of the upper cover 17A provided in the LED unit 2B is formed from a transparent resin. However, the present invention is not limited to this, and the dome portion of the upper cover 17A. 17C may be milky white or other colors other than transparent. Further, the dome portion 17C of the cover 17A may be formed of a material such as glass other than resin. Furthermore, the dome portion 17C may be provided with a lens function to control the emitted light and reflected light (for example, ensuring the directivity of light).

  (10) In the present embodiment, the surface light emitting module 1 is mounted in one direction to constitute the surface light emitting device 10. However, the present invention is not limited to this, and light emission of a plurality of surface light emitting modules 1 is performed. A surface light emitting device that emits light on both sides may be provided by providing the surfaces in opposite directions. Furthermore, by providing a plurality of surface light emitting modules 1 in multiple directions, a multi-surface light emitting surface emitting device can be obtained.

FIG. 1 is a perspective view of a direct-type surface emitting module according to the first embodiment of the present invention. FIG. 2 is a cross-sectional view showing the configuration of the surface emitting module 1 according to the first embodiment of the present invention. FIG. 3 is a cross-sectional view of a surface light-emitting device configured using the surface light-emitting module according to the first embodiment of the present invention. FIG. 4 is a cross-sectional view of a structure in which a plurality of surface emitting modules are connected using a chassis. FIG. 5 is a perspective view showing a sealing state of the LED and the substrate shown in FIG. 2 with silicone. 6A and 6B show a modification of the support member and the cover member of the surface emitting module according to the first embodiment, wherein FIG. 6A is a perspective view of the modification, and FIG. 6B is an enlarged sectional view of a part thereof. . FIG. 7 is a block diagram showing the configuration of the drive unit of the surface emitting module. FIG. 8 is a perspective view of a surface emitting module according to the second embodiment. FIG. 9 is an exploded perspective view of the surface emitting unit included in the surface emitting module. FIG. 10 is a cross-sectional view of the surface emitting unit. FIG. 11 is a perspective view of a surface emitting module according to the third embodiment. FIG. 12 shows an LED unit included in the surface emitting module, (A) is a perspective view of a plurality of LED units, and (B) is an enlarged perspective view of the LED unit. FIG. 13 shows an example of a surface light-emitting device configured using the surface light-emitting module according to the third embodiment, where (A) is a cross-sectional view of the surface light-emitting device and (B) is a perspective view of a recess. (C) is a cross-sectional view thereof. FIG. 14 shows a modification of the support member of the surface light emitting device configured using the surface light emitting module according to the third embodiment, (A) is a cross-sectional view of the surface light emitting device, and (B) is It is a perspective view of the protrusion part and recessed part of a supporting member, (C) is the sectional drawing. FIG. 15 shows a modified example of the LED unit of the surface emitting module according to the third embodiment, (A) is a perspective view of the modified example, and (B) is a sectional view thereof. FIG. 16 shows another modification of the LED unit of the surface emitting module according to the third embodiment, (A) is a perspective view of the modification, and (B) is a sectional view thereof.

Explanation of symbols

1 surface emitting module 1A surface emitting unit 2 LED
2B LED unit 3 Silicone 3A Silicone sealing part 3B Silicone plate 4 Wiring 5 Mounting board 6 Support member 6A Groove part 6B Protrusion part 6C Recessed part 7 Drive part 10 Surface light-emitting device 11 Front plate 12 Back plate 13 Chassis 14, 14A Screw 14B Screw fixing Part 15 Cap 16 Transparent cover 17 Cover 17A Upper cover 17B Lower cover 17C Dome part 18 Cable 20 LED part 61 Long support member 71 Input part 72 Rectification part 73 Constant current part 74 Switch 75 Sensor 76 Timer 77 Power supply

Claims (15)

A plurality of LEDs;
A first support member provided with the plurality of LEDs;
A drive unit that is supplied with current from an external power source and drives the plurality of LEDs;
A surface-emitting module, comprising a reflective surface provided on a back surface of the LED and reflecting light emitted from the LED.   The surface emitting module according to claim 1, wherein the first support member is formed integrally with the reflecting surface.   The surface emitting module according to claim 1, wherein the driving unit is built in the surface emitting module.   The driving unit includes a power input unit that inputs an alternating current from the external power source, a rectifying unit that rectifies the alternating current into a direct current, and the LEDs that are supplied by the direct current supplied from the rectifying unit. The surface emitting module according to claim 1, comprising a constant current unit to be driven. The surface emitting module further includes a board on which the plurality of LEDs are mounted, and a wiring that is provided on the first support member and connects the plurality of LEDs to the driving unit,
The surface emitting module according to claim 1, wherein the first support member mounts the substrate, and a joint portion between the substrate and the plurality of LEDs is sealed with a resin.   6. The surface emitting module according to claim 5, wherein the first support member has a groove for mounting the substrate.   The surface emitting module according to claim 6, wherein the groove is covered with a protective member for each of a single row or a plurality of rows. The surface emitting module is
A plurality of surface emitting units each including a substrate on which the plurality of LEDs are mounted and a second support member on which the substrate is mounted; and the plurality of surface light emitting units provided on the first support member and the second support member. The surface emitting module according to claim 1, further comprising a wiring for connecting the LED to the driving unit.   9. The surface emitting module according to claim 8, further comprising a light-transmitting cover member that covers the plurality of LEDs and is joined to the second support member. The surface emitting module is
A plurality of LED units each including a substrate on which one of the plurality of LEDs is mounted, a housing on which the substrate is mounted, and a joint portion between the LED and the substrate is sealed with a resin; and
The surface emitting module according to claim 1, comprising a cable connecting the driving unit and the plurality of LED units.   The surface emitting module according to claim 10, wherein the first support member includes a recess for mounting the LED unit.   The surface emitting module according to claim 11, wherein the recess is formed in a protruding portion provided in the first support member.   The surface emitting module according to claim 1, further comprising a diffusing member that diffuses the emitted light of the LED and the reflected light of the reflecting surface.   14. The surface emitting module according to claim 13, wherein the diffusing member is provided as a common member for the plurality of surface emitting modules. A diffusion plate,
Including a light emitting plate disposed on the back side of the diffusion plate,
The light emitting plate is composed of a plurality of surface emitting modules having the same shape,
Each of the plurality of surface light emitting modules includes a light emitting unit composed of a plurality of LEDs and a drive unit that drives the light emitting unit.

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