JP2017168351A - Light-emitting unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light-emitting unit capable of securing lightness even at an abutting part between LED substrates.SOLUTION: An LED substrate 6 is constituted by mounting LED elements 12 in an array in a substrate long-side direction and in two arrays in a substrate short-side direction on an LED mounting substrate 10 which is a rectangular shape having long-sized long sides and can be mounted with an even number of LED elements 12 in total, and also mounting an end-part center LED element 12c at a center part of four LED elements 12 in two rows and two columns at one end part in the substrate long-side direction. Then when a light-emitting unit 2 is constituted by making four LED substrates 6 abut on each other in a length direction, two LED substrates 6 on substrate array-directional inner sides are arranged such that the end-part center LED elements 12c are close. Further, LED substrates 6 on the substrate array-directional both outer sides are arranged such that end-part one-side LED elements 12c are on the substrate array-directional outer sides.SELECTED DRAWING: Figure 15

Description

  The present invention relates to a light emitting unit that emits light from a long LED substrate on which a plurality of LEDs are arranged. For example, the present invention is suitable for a light emitting unit that is used by being mounted on an instrument body attached to a ceiling position.

  A light emitting diode (hereinafter, LED (Light Emitting Diode)) is attracting attention as a light emitting element as a light source used for illumination, and an LED substrate in which a plurality of LEDs are arranged on a substrate has been developed as a light emitting element substrate. As an illumination device, for example, as described in Patent Document 1 below, a light emitting unit using a long LED substrate on which a plurality of LEDs are arranged has been developed. In the illuminating device described in this patent document, two long light emitting units are mounted side by side in a long direction on a long instrument body mounted at a ceiling position, and the total length is 2000 mm or longer. Configure the device.

Japanese Patent No. 5667262

In the illuminating device described in Patent Document 1, two long light emitting units are arranged in the longitudinal direction to form a long illuminating device, and this long illuminating device is desired to be configured by a single light emitting unit. There is a request. As described above, the LED substrate constituting the long light emitting unit is manufactured by mounting the LED on the long LED mounting substrate. However, the length of the LED mounting substrate itself is restricted in manufacturing. . That is, a long light emitting unit must be configured by arranging a plurality of long LED substrates in the long direction. Also, each LED board itself has a restriction that an odd number of LEDs must be mounted due to, for example, efficiency and manufacturing restrictions. Then, a part with low brightness arises in the light emitting unit constituted by arranging a plurality, specifically, four or more LED substrates in the longitudinal direction. Although this occurs at the portion where the LED substrates are abutted with each other, it is necessary to develop a specific technique for ensuring the brightness at the abutting portion between the LED substrates.
The present invention has been made paying attention to the above-described problems, and an object of the present invention is to provide a light-emitting unit capable of ensuring brightness even at a butted portion between LED substrates.

  In order to solve the above-described problem, according to one aspect of the present invention, a plurality of LED mounting substrates, and LED element groups arranged in two rows with respect to the LED mounting substrate, are used. The board is composed of two adjacent LED mounting boards as a set, and the LED mounting boards constituting the set are arranged to face each other in the long side direction of the board, and are located at one end in the long side direction of the board End LED elements are arranged in a region surrounded by four LED elements in two rows and two columns of the element group, and the LED mounting substrate constituting one set is in contact with the other end in the long side direction of each substrate. A light emitting unit arranged in a manner is provided.

  In the light emitting unit of the present invention, it is possible to ensure brightness even at the abutting portion between the LED substrates.

It is a perspective view which shows an example of the illuminating device using one Embodiment of the light emission unit of this invention. It is a block diagram of the illuminating device of FIG. 1, (a) is sectional drawing, (b) is a top view, (c) is a right view. It is a top view of the LED board used for the light emission unit of FIG. 1, FIG. It is a top view of the board | substrate for LED mounting for comprising the LED board of FIG. It is a top view of the double row mounting part in the board | substrate for LED mounting of FIG. It is a block diagram of LED connection of the double row mounting part of FIG. It is a top view of the edge part of the elongate direction in the board | substrate for LED mounting of FIG. It is explanatory drawing of the LED mounting state in the board | substrate for LED mounting of FIG. FIG. 5 is a plan view of the other end portion in the longitudinal direction of the LED mounting substrate mounting substrate of FIG. 4. It is explanatory drawing which shows an example of LED board arrangement | positioning in the light emission unit of FIG. It is explanatory drawing which shows the other example of LED board arrangement | positioning in the light emission unit of FIG. It is explanatory drawing which shows an example of LED board arrangement | positioning in the light emission unit of the conventional illuminating device. It is explanatory drawing of the comparative example with respect to the LED board arrangement | sequence of FIG. 10, FIG. It is explanatory drawing which shows the further another example of LED board arrangement | positioning in the light emission unit of FIG. It is explanatory drawing of LED board arrangement | positioning which shows other embodiment of the light emission unit of this invention. It is a top view of the board | substrate for LED mounting for comprising the LED board of FIG. It is explanatory drawing which shows the other example of LED board arrangement | positioning in the light emission unit of FIG.

  The following embodiments exemplify apparatuses and methods for embodying the technical idea of the present invention, and the technical idea of the present invention is the material, shape, structure, arrangement, etc. of components. Is not specified as follows. The technical idea of the present invention can be variously modified within the technical scope defined by the claims described in the claims.

  Hereinafter, an embodiment of a light emitting unit of the present invention will be described with reference to the drawings. In FIG. 1, the perspective view of the illuminating device using the light emission unit of this embodiment is shown. 2 is a configuration diagram of the lighting device of FIG. 1, in which (a) is a cross-sectional view, (b) is a plan view, and (c) is a right side view. The illuminating device of this embodiment is used by being attached to a ceiling position, for example, and includes an instrument body 1 fixed to the ceiling position and a light emitting unit 2 attached to the instrument body 1. Therefore, the light emitting unit 2 is arranged indoors, that is, below the appliance main body 1. The instrument main body 1 is suspended by inserting a bolt member (not shown) hanging from the ceiling, for example. A spring member 3 that can be suspended and swung is attached to the instrument body 1. When the spring receiver 4 of the light emitting unit 2 is hooked on the spring member 3 and the light emitting unit 2 is pushed up in this state, the spring member 3 is moved. The light emitting unit 2 is fixed to the instrument body 1 by engaging with the spring receiver 4 in a state where the spring receiver 4 is pushed upward.

  This lighting device has a total length of 2000 mm or longer, but only one light emitting unit 2 is attached. That is, a long light emitting unit 2 having a length equivalent to that of the lighting device is used. In the light emitting unit 2, four long LED substrates 6 are abutted in the longitudinal direction to form a light emitting source. In this embodiment, the long LED substrate 6 is attached to the support member 8 in a state in which four long LED substrates 6 are butted in the long direction, and the light emitting side of the LED substrate 6 is covered with a long translucent cover 9. 2 is constructed in one piece. As described in Patent Document 1, a heat sink (not shown) for heat dissipation is provided on the opposite side of the LED substrate 6 from the room, and a reflection sheet (not shown) is provided on the indoor side of the LED board 6. A power supply unit 5 for supplying power to the LED elements 12 on the LED substrate 6 is attached to the support member 8 of the light emitting unit 2. In addition, even if the specifications of the bolt members (hanging bolts) hanging from the ceiling are different, the power supply unit 5 is arranged at the end in the longitudinal direction of the support member 8 so as not to interfere with the bolt members. Yes.

  FIG. 3 is a plan view of the LED substrate 6 used in the light emitting unit 2 of FIGS. 1 and 2, and FIG. 4 is a plan view of the LED mounting substrate 10 for constituting the LED substrate 6 of FIG. That is, the LED element 12 is mounted on the LED mounting substrate 10 of FIG. 4 to configure the LED substrate 6 of FIG. This LED mounting substrate 10 is formed as an LED substrate 6 by mounting an odd number of LED elements 12. Each LED board 6 itself has a restriction that an odd number of LED elements 12 must be mounted due to, for example, power-luminescence efficiency and manufacturing restrictions. The LED mounting substrate 10 is a rectangle having a very long long side. As the main part of the LED substrate 6, the LED elements 12 are arranged in a row in the substrate long side direction and in a two-row arrangement in the substrate short side direction. It has LED double row mounting part to mount. FIG. 5 shows details of the LED double-row mounting part. The hatched portion in the figure is the copper foil electrode 11, and the LED element 12 is arranged and mounted as shown by the broken line in the figure so as to straddle the gap between the copper foil electrodes 11. This LED double-row mounting part is configured so that, for example, five LED elements 12 arranged in parallel can be soldered to the copper foil electrode 11, and as a result, as shown in the block diagram of FIG. Five LED elements 12 connected to each other are connected in series.

  Moreover, in this LED mounting substrate 10, as shown in FIG. 7, any one of the two rows of the LED double row mounting portion at one end portion in the long side direction of the board with respect to the LED double row mounting portion. Only at the extended position of the row, the end portion side LED mounting portion capable of mounting the end portion side LED elements 12a at the same pitch as that of the row is provided. In addition, in this LED mounting substrate 10, similarly to the LED double row mounting portion, it is located at one end in the long side direction of the board and at an intermediate position between the two rows of the LED double row mounting portion than the LED double row mounting portion. An end center LED mounting portion capable of mounting the end center LED element 12b is provided on the outside in the long side direction of the substrate, specifically, at an intermediate position between the LED double-row mounting portion and the end one-side LED mounting portion. Since an odd number of LED elements 12 are mounted on a single LED substrate 6, in addition to the LED double-row mounting part, the end part one side LED element 12a is mounted on the end part one side LED mounting part, It is selected whether the end center LED element 12b is mounted on the section center LED mounting portion. That is, in this LED mounting substrate 10, as shown by the solid line in FIG. 8, the end portion one-side LED element 12 a is mounted on the end portion of the LED double row mounting portion in the longitudinal direction of the substrate. The first LED substrate 6a and the second LED substrate 6b in which the end center LED element 12b is mounted on the end portion in the substrate longitudinal direction of the LED double row mounting portion as shown by the broken line in FIG. 8 can be obtained. it can. In other words, when attention is paid to the five LED elements 12, 12a, 12b at one end of the LED substrate 6 in the longitudinal direction, one of them is surrounded by the other four LED elements. It should be noted that, even at one end in the board length direction, four LED elements 12 in two columns and two rows near the one end in the board length direction of the LED two-row mounting portion and one end side LED element 12a or end A total of five LED elements 12 of the central LED element 12b are connected in parallel, and are directly connected to the other LED elements 12.

  An LED double-row mounting part is formed at the other end of the LED mounting board 10 in the longitudinal direction of the board in the same manner as described above. As described later, the copper foil electrode 11 between the LED boards 6 is provided. In order to connect or connect the copper foil electrode 11 to the power supply unit 5, as shown in FIG. 9, the connector unit 7 is provided on the copper foil electrode 11. In this example, among the five LED element mounting portions at the other end in the board length direction of the upper or lower row of the figure, the left end portion of the figure, that is, the first row and the right side thereof, that is, The connector part 7 is provided in the copper foil electrode 11 between the second rows. And as will be described later, by connecting the connector portions 7 of the adjacent LED substrates 6, the five LED elements 12 connected in parallel at the other end in the substrate longitudinal direction are connected to the other LED elements 12. Are connected in series.

  In this embodiment, as described above, the first LED substrate 6a in which the end-side LED element 12a is mounted on the end portion of the LED double row mounting portion on the substrate length direction, and the end portion of the LED double row mounting portion in the long direction of the substrate. Two second LED substrates 6b each having the end center LED element 12b mounted thereon are used. Then, as shown in FIGS. 10 and 11, the second LED substrate 6b, the first LED substrate 6a, the first LED substrate 6a, and the second LED substrate 6b are arranged in contact with each other in the longitudinal direction. At that time, the second LED boards 6b on both outer sides in the board arrangement direction are arranged such that the end central LED elements 12b are on the outer side in the board arrangement direction, and the two first LED boards 6a are staggered on the end one side LED elements 12a. Arrange to face each other. A thick solid line on the LED substrate 6 in the figure briefly shows the connection state of each LED element 12 on the substrate. In addition, the number of the LED elements 12 on the LED board 6 in the figure is smaller than the actual number.

  In FIG. 10, the left two LED boards 6 (second LED board 6b, first LED board 6a) in the figure are paired to supply power from the power supply unit 5, and the two right LED boards 6 (second LED boards in the figure). 6b and the first LED substrate 6a) are used as a set to supply power from the power supply unit 5. Therefore, in FIG. 10, the lower right connector portion 7 of the leftmost LED substrate 6 (second LED substrate 6b) in the drawing and the lower left connector portion of the second LED substrate 6 (first LED substrate 6a) from the left in the drawing. 7 and a connector portion 7 on the upper right side of the LED substrate 6 (second LED substrate 6b) at the left end of the drawing and a connector portion on the upper left side of the second LED substrate 6 (first LED substrate 6a) from the left in the drawing. 7 is connected to the power supply unit 5. Further, in FIG. 10, the lower left connector portion 7 of the rightmost LED substrate 6 (second LED substrate 6b) in the drawing and the lower right connector portion of the second LED substrate 6 (first LED substrate 6a) from the right in the drawing. 7 and a connector portion 7 on the upper left side of the LED substrate 6 (second LED substrate 6b) at the right end of the drawing and a connector portion 7 on the upper right side of the second LED substrate 6 (first LED substrate 6a) from the right in the drawing. 7 is connected to the power supply unit 5.

  In contrast, in FIG. 11 as well, power is supplied from the power supply unit 5 as a pair of the left two LED boards 6 (second LED board 6b, first LED board 6a) in the figure, and the two right LED boards 6 in the figure. Power is supplied from the power supply unit 5 as a set (the second LED board 6b and the first LED board 6a). Therefore, in FIG. 11, the connector portion 7 at the lower right and right sides of the LED substrate 6 (second LED substrate 6b) at the left end of the drawing and the lower left and right sides of the LED substrate 6 (first LED substrate 6a) from the left at the left in the drawing. The connector part 7 is connected, and the upper right connector part 7 of the leftmost LED board 6 (second LED board 6b) in the figure and the second upper LED board 6 (first LED board 6a) from the left of the figure are shown. The connector part 7 is connected to the power supply part 5. As a result, power is supplied from the power supply unit 5 to the set of two LED boards 6 (second LED board 6b and first LED board 6a) on the left side of the drawing. On the other hand, the lower left connector portion 7 of the rightmost LED substrate 6 (second LED substrate 6b) in the drawing is connected to the lower right connector portion 7 of the second LED substrate 6 (first LED substrate 6a) from the right in the drawing. At the same time, the connector part 7 on the upper left side of the LED board 6 (second LED board 6b) at the right end of the figure and the connector part 7 on the upper right side of the LED board 6 (first LED board 6a) shown on the right side of the figure are connected. To do. The right upper connector portion 7 of the leftmost LED substrate 6 (second LED substrate 6b) in the drawing is routed around the LED element 12 to the additional connector portion 7 at the lower right portion of the figure, and this additional connector portion 7 is shown in FIG. Of the second LED board 6 (first LED board 6a) from the left of FIG. The additional connector portion 7 on the lower left side of the second LED substrate 6 (first LED substrate 6a) from the left in this figure passes through the outside of the LED element 12 and is independently wired to the additional connector portion 7 on the lower right side in the drawing. Accordingly, the additional connector portion 7 on the lower right side of the second LED board 6 (first LED board 6a) from the left side of the drawing is connected to the additional connector portion 7 on the lower right side of the second LED board 6 (first LED board 6a) from the right side of the drawing. Connect to the connector section 7. On the other hand, the upper left connector portion 7 in the figure of the second LED board 6 (first LED board 6a) from the right in the figure is the additional connector part in the upper right figure of the second LED board 6 (first LED board 6a) from the left in the figure. Connect to 7. The additional connector portion 7 on the upper right side of the second LED substrate (first LED substrate 6a) from the left in the figure is connected to the upper left connector portion 7 by a branch wiring passing outside the LED element 12. Accordingly, power is also supplied from the power supply unit 5 to the pair of the two LED boards 6 (second LED board 6b and first LED board 6a) on the right side of the drawing.

  In these light emitting units 2, the butted portions of the LED substrate 6, particularly the second LED substrate 6 from the left (first LED substrate 6 a) and the second LED substrate 6 from the right (first LED substrate 6 a) in FIGS. 10 and 11. In the butting portion, the end-side one-side LED elements 12a are arranged so as to face each other in a staggered manner. For this reason, brightness can be ensured at the butted portion of the LED substrate 6. In addition, the distance between the LED element 12a on one side of the end portion and the adjacent LED element 12 forming a row may be smaller than the distance between the LED elements 12 forming the row. Then, by doing so, it is possible to further secure the brightness at the abutting portion between the second LED board 6 (first LED board 6a) from the left and the second LED board 6 (first LED board 6a) from the right. it can. Incidentally, as described above, a heat sink for heat dissipation is provided on the opposite side of the LED substrate 6 to the room, and the power supply unit 5 is disposed on the opposite side of the room from the heat sink. Therefore, the power supply part 5 and each LED board 6 are connected by the wiring member inserted in the hole part which is formed in the heat sink and which is not illustrated.

  FIG. 12 is a bottom view of a conventional long illumination device. That is, two light emitting units 2 are attached to one instrument main body 1 in a longitudinal direction. For example, two LED substrates 6 are attached to each light emitting unit 2 so as to be in contact with each other in the longitudinal direction. For example, as described above, when the total number of LED elements mounted on each LED board 6 is an odd number, the LED board 6 in which the end center LED element 12b is mounted on one end in the board length direction, that is, the second LED The substrate 6b is used, and the end center LED elements 12b are arranged so as to be outside the substrate arrangement direction. In this case, since the length direction direction edge part of each light emission unit 2 has only one edge center LED element 12b, brightness is low. However, in the conventional illuminating device in which the two light emitting units 2 are butted in the longitudinal direction, even if the brightness of the end of the butted light emitting unit 2 is low, there is no sense of incongruity.

  FIG. 13 shows, for example, a case where a single long light-emitting unit 2 is configured by abutting four LED substrates 6 having the end central LED elements 12b used in FIG. 12, that is, four second LED substrates 6b in the longitudinal direction. Is shown. In this case, the end central LED element 12b located at a position far from the end in the longitudinal direction of each substrate is arranged at the abutting portion between the second LED substrate 6 from the left and the second LED substrate 6 from the right. The brightness of the part is low. In this case, since the light emitting unit 2 is single and the brightness of the central portion in the longitudinal direction is low, there is a sense of incongruity.

  On the other hand, in the light emitting unit 2 shown in FIGS. 10 and 11, at the abutting portion of the second LED board 6 (first LED board 6a) from the left and the second LED board 6 (first LED board 6a) from the right, The edge part one side LED element 12a is arrange | positioned so that it may face in zigzag form. For this reason, brightness can be ensured at the butted portion of the LED substrate 6. Also, in each of the leftmost LED substrate 6 (second LED substrate 6b) and the rightmost LED substrate 6 (second LED substrate 6b), each LED substrate 6 is disposed so that the end central LED element 12b is outside the substrate arrangement direction. doing. As a result, a total of four LED elements 12 are arranged, two at the abutting portion between the leftmost LED substrate 6 (second LED substrate 6b) and the second LED substrate 6 (first LED substrate 6a) from the left. In addition, a total of four LED elements 12 are arranged, two at the abutting portion between the rightmost LED substrate 6 (second LED substrate 6b) and the second LED substrate 6 (first LED substrate 6a) from the right. Therefore, it is possible to ensure brightness even at the butted portions of these LED substrates 6. Incidentally, as a modification of the light emitting unit 2 in FIGS. 10 and 11, for example, as shown in FIG. 14, the LED substrate 6 in which the end one-side LED element 12a is arranged at the end in the longitudinal direction of the substrate, that is, the first LED substrate 6a. 4 may be faced in the longitudinal direction. In that case, at the abutting portion of the second LED substrate 6 (first LED substrate 6a) from the left and the second LED substrate 6 (first LED substrate 6a) from the right, the end one-side LED elements 12a face each other in a staggered manner. The left and right LED substrates 6 (first LED substrates 6a) and the rightmost LED substrate 6 (first LED substrate 6a) are arranged so that the LED elements 6a on one end are located on the outer side in the substrate arrangement direction. Place. Thereby, also in the modified example of FIG. 12, it is possible to ensure brightness at each butted portion of the LED substrate 6.

  FIG. 15 is an explanatory diagram of an LED board arrangement showing another embodiment of the light emitting unit 2 of the present invention. In this embodiment, a different LED substrate 6 (third LED substrate 6c) is used instead of the LED substrate 6 used in the embodiments of FIGS. FIG. 16 is a plan view of the LED mounting substrate 10 for constituting the LED substrate 6 (third LED substrate 6c) of FIG. The LED board 6 (third LED board 6c) of this embodiment is similar to the LED board 6 of FIGS. 10 and 11, and the LED elements 12 are arranged in two rows in the long side direction of the board and in the double side direction of the short side of the board. The LED double-row mounting portion is mounted, and the end central LED element 12c is mounted at the central portion of the four LED elements 12 in two rows and two columns at one end in the substrate long side direction. In other words, when attention is paid to the five LED elements 12 and 12c at one end of the LED board 6 in the board longitudinal direction, one of them is surrounded by the other four LED elements. In addition, this edge part center LED element 12c does not necessarily need to be the center part of the four LED elements 12 of 2 rows 2 columns of one edge part of a board | substrate long side direction, for example, either of 2 rows You may make it arrange | position between the LED elements 12 of a row | line | column.

  Then, four LED substrates 6 (third LED substrates 6c) are abutted in the longitudinal direction to form the light emitting unit 2. Among these, the two LED substrates 6 (third LED substrate 6c) on the inner side in the substrate arrangement direction are arranged so that the respective end center LED elements 12c approach each other. Thereby, brightness can be ensured at the butted portion of the two LED substrates 6 (third LED substrate 6c) on the inner side in the substrate arrangement direction. Further, the LED substrates 6 (third LED substrates 6c) on both outer sides in the substrate arrangement direction are arranged so that the end central LED elements 12c are on the outer side in the substrate arrangement direction. Thereby, brightness can be ensured at the butted portion of the two LED substrates 6 (third LED substrate 6c) on the outer side in the substrate arrangement direction. Moreover, FIG. 17 is explanatory drawing which shows the other example of LED board arrangement | positioning in the light emission unit 2 of FIG. In this example, the LED boards 6 (third LED boards 6c) on both outer sides in the board arrangement direction are arranged such that the end center LED elements 12c are on the inner side in the board arrangement direction. Thereby, brightness can be ensured at the butted portion of the two LED substrates 6 (third LED substrate 6c) on the outer side in the substrate arrangement direction.

As described above, the light emitting unit 2 of these embodiments includes a plurality of LED mounting boards 10 and a group of LED elements 12 arranged in two rows with respect to the LED mounting boards 10. The substrate 10 is configured as a pair of two adjacent LED mounting substrates 10, and the LED mounting substrate 10 constituting the set is disposed so as to be abutted in the substrate long side direction, and one end of the substrate long side direction End LED elements 12a to 12c are arranged in a region surrounded by four LED elements 12 in two rows and two columns of the LED element 12 group located at the position, and each of the LED mounting substrates 10 constituting a set includes The other end of the substrate in the long side direction was placed in contact with each other. Thereby, brightness can be ensured at the abutting portion of the two LED substrates 6 on the inner side in the substrate arrangement direction.
It goes without saying that the present invention includes various embodiments not described herein. Therefore, the technical scope of the present invention is defined only by the invention-specific matters described in the appropriate claims from the above description.

DESCRIPTION OF SYMBOLS 1 Appliance main body 2 Light emitting unit 3 Spring member 4 Spring receptacle 5 Power supply part 6 LED board 7 Connector part 8 Support member 9 Cover 10 LED mounting board 11 Copper foil electrode 12 LED element

Claims (2)

A plurality of LED mounting boards;
An LED element group arranged in two rows with respect to the LED mounting substrate,
The plurality of LED mounting boards are configured as a set of two adjacent LED mounting boards,
The LED mounting substrates constituting the set are arranged to face each other in the long side direction of the substrate,
An edge LED element is arranged in a region surrounded by four LED elements in two rows and two columns of the LED element group located at one end of the substrate long side direction,
The LED mounting substrates that constitute the set are light emitting units in which the other end in the long side direction of each substrate is abutted against each other. 2. A pair of connector portions are arranged in a region surrounded by four LED elements in two rows and two columns of the LED element group located at the other end in the board long side direction of the LED mounting substrate. The light emitting unit described in 1.

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