JP2018093192A - Light-emitting device and board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compact light-emitting device and a board having a wiring pattern capable of wiring light-emitting elements, emitting light of different colors, without interfering each other.SOLUTION: In a light-emitting device 200 including multiple light-emitting elements, and a board having an upper surface where multiple wiring patterns corresponding to the multiple light-emitting elements are provided, each wiring pattern includes a conductor pattern 10 for light-emitting elements having a light-emitting element mounting region 12, and a contact region 14 connected with the light-emitting element mounting region, and a conductor pattern 20 for detour surrounding the light-emitting element mounting region. The multiple wiring patterns include a first wiring pattern, and a second adjacent wiring pattern corresponding to the light-emitting element of different color. Contact region of the first wiring pattern and the conductor pattern for detour of the second wiring pattern are connected by means of a wire 70, and the conductor pattern for detour of the first wiring pattern and the upper electrode 62 of the light-emitting element on the second wiring pattern are connected by means of a wire.SELECTED DRAWING: Figure 3A

Description

  The present invention relates to a light emitting device using a light emitting element and a substrate on which the light emitting element can be placed.

  Some light-emitting devices using light-emitting elements have an array in which a plurality of light-emitting elements that emit light of different colors are arranged in a line (for example, see Patent Document 1).

JP2013-191787A

  In the array described in Patent Document 1, light emitting elements that emit light of different colors are arranged adjacent to each other, and light emitting elements that emit light of different colors are individually emitted, the light emitting elements that emit light of different colors are used. It is necessary to electrically separate them. For this reason, for example, it is necessary to arrange a plurality of electrode plates side by side at a position outside the array in which the light emitting elements are arranged. Therefore, the required area of the wiring pattern increases and it is difficult to reduce the size of the light emitting device. Further, there is a possibility that wires connecting the light emitting element side and the electrode plate side interfere with each other.

  The present invention has been made in view of the above problems, and has a compact wiring pattern capable of appropriately wiring light emitting elements that emit light of different colors arranged adjacent to each other without interfering with each other. An object is to provide a compact light emitting device and a substrate.

In order to solve the above problems, a light-emitting device according to one embodiment of the present invention includes a plurality of light-emitting elements each having an upper electrode and a lower electrode, and a substrate on which the plurality of light-emitting elements are disposed, And a substrate provided with a plurality of wiring patterns corresponding to each of the plurality of light emitting elements, and each of the plurality of wiring patterns is connected to a lower electrode of the light emitting element, A light emitting element placement region defined by first, second, third and fourth sides in order in plan view, and a contact region connected to a part of the first side of the light emitting element placement region; A conductive pattern for a light emitting element, and a detouring conductor surrounding a part of the first side, the whole of the second side, and a part or the whole of the third side where the contact region does not exist Pattern, before One end located on the side of the third side in the bypass conductor pattern is provided on the side of the fourth side than the other end located on the side of the first side in the conductor pattern for bypass. And in the adjacent two wiring patterns, the first side of one wiring pattern and the third side of the other wiring pattern are opposed to each other. The plurality of wiring patterns are arranged such that, among the plurality of light emitting elements, a first wiring pattern corresponding to one light emitting element and another light emitting element that emits light of a color different from that of the one light emitting element. And a second wiring pattern adjacent to the first wiring pattern on the first side side of the first wiring pattern,
The contact region of the first wiring pattern and the bypass conductor pattern of the second wiring pattern are connected by one or more wires, and the bypass conductor pattern of the first wiring pattern The upper electrode of the light emitting element provided in the second wiring pattern is connected by one or more wires.

  The board | substrate which concerns on 1 aspect of this invention is a board | substrate which has the said some wiring pattern, and each of these wiring patterns is prescribed | regulated by 1st, 2nd, 3rd, and 4th in order in planar view. A light-emitting element conductor pattern having a light-emitting element placement area, a contact area connected to a part of the first side of the light-emitting element placement area, and the first contact area without the contact area. A detouring conductor pattern surrounding a part of the side, the whole of the second side, and a part or the whole of the third side, wherein the side of the third side in the detouring conductor pattern A bypass conductor pattern provided on the fourth side with respect to the other end positioned on the first side of the bypass conductor pattern, and adjacent to the bypass conductor pattern. One wiring in two wiring patterns And the first side of the turn, and the said third side of another one wiring patterns are arranged so as to face each other.

  According to said aspect, the compact light-emitting device and board | substrate which have a compact wiring pattern which can wire appropriately the light emitting element which emits the light of a different color arrange | positioned adjacently without a wire mutually interfering are provided. can do.

It is a top view which shows typically the wiring pattern used for the light-emitting device which concerns on the 1st Embodiment of this invention. It is a side view which shows typically the light emitting element mounted in the wiring pattern shown to FIG. 1A. It is a light emitting device concerning a 1st embodiment of the present invention, and is a top view showing typically an example at the time of connecting with one wire. It is a perspective view which shows typically the flow of electricity in the light-emitting device shown to FIG. 2A. It is a light emitting device concerning a 1st embodiment of the present invention, and is a top view showing typically an example at the time of connecting with a plurality of wires. It is a perspective view which shows typically the flow of electricity in the light-emitting device shown to FIG. 3A. It is a top view which shows typically arrangement | positioning of the wire which connects between the light emitting elements arrange | positioned adjacently. FIG. 3 is a plan view schematically showing an example of the light emitting device according to the first embodiment of the present invention, in which a bypass wire is provided in a bypass conductor pattern. It is a perspective view for demonstrating the wire for bypass in the light-emitting device shown to FIG. 5A. It is a top view which shows typically the wiring pattern used for the light-emitting device which concerns on the 2nd Embodiment of this invention. It is a light-emitting device concerning a 2nd embodiment of the present invention, and is a top view showing typically an example at the time of connecting with a plurality of wires. It is a perspective view which shows typically the flow of electricity in the light-emitting device shown to FIG. 7A. It is a top view which shows typically the wiring pattern used for the light-emitting device which concerns on the 3rd Embodiment of this invention. It is a light-emitting device concerning a 3rd embodiment of the present invention, and is a top view showing typically an example at the time of connecting with one wire. It is a perspective view which shows typically the flow of electricity in the light-emitting device shown to FIG. 9A.

Hereinafter, embodiments according to the present invention will be described with reference to the drawings.
[Light Emitting Device According to First Embodiment of the Present Invention]
First, the wiring pattern 50 used in the light emitting device 100 according to the first embodiment of the present invention will be described with reference to FIGS. 1A and 1B. Here, FIG. 1A is a plan view schematically showing a wiring pattern, and FIG. 1B is a side view schematically showing a light emitting element placed on the wiring pattern shown in FIG. 1A. In all the embodiments described later, the same reference numerals are used for members having the same function.

The wiring pattern 50 is a wiring pattern applied to the light emitting element 60 in which the upper electrode 62 and the lower electrode 66 are provided on the upper and lower surfaces of the element body 64. As shown in FIG. 1, the wiring pattern 50 is composed of a conductive pattern made of a conductive material such as gold, nickel, or copper provided on a substrate material 82. Note that the wiring pattern 50 may or may not include the substrate material 82.
More specifically, the wiring pattern 50 is connected to the lower electrode 66 of the light emitting element 60, and in order of the first side 12A, the second side 12B, the third side 12C, and the fourth side 12D in plan view. A light-emitting element conductor pattern 10 having a light-emitting element placement area 12 defined and a contact area 14 connected to a part of the first side 12A of the light-emitting element placement area 12 is provided.

  The wiring pattern 50 further includes a detouring conductor pattern 20 surrounding a part of the first side 12A, the whole of the second side 12B, and a part or the whole of the third side 12C where the contact region 14 does not exist. Have. Therefore, the bypass conductor pattern 20 faces the first side region 22 facing the first side 12A, the second side region 24 facing the second side 12B, and the third side 12C. The third side region 26 is configured.

  In the present embodiment, one end located on the third side 12C side in the bypass conductor pattern 20 is fourth than the other end located on the first side 12A side in the bypass conductor pattern 20. It is provided on the side of the side 12D. That is, the detouring conductor pattern 20 includes a first side region 22 and a third side region 26 that extends longer to the fourth side 12D than the first side region 22. It has a planar shape connected via two side regions 24.

(Light emitting device using one wire)
Next, the light emitting device 100 including the wiring patterns 50P to 50S as the plurality of wiring patterns 50 will be described with reference to FIGS. 2A and 2B. In the light emitting device 100, the contact region 14 of the wiring pattern 50Q and the bypass conductor pattern 20 of the wiring pattern 50R are connected by a single wire and placed on the bypass conductor pattern 20 and the wiring pattern 50R of the wiring pattern 50Q. The upper electrode 62 of the light emitting element thus connected is connected by a single wire. Here, FIG. 2A is a plan view schematically showing the light emitting device 100. FIG. 2B is a perspective view schematically showing the flow of electricity in the light emitting device 100. A thick line having an arrow at the tip of FIG. 2B (thick arrow) indicates the flow of electricity.

In this example, a substrate 80 in which four wiring patterns 50P, 50Q, 50R and 50S are arranged in a line is provided between a terminal 40+ arranged at both ends and a terminal 40-. A plurality of light emitting elements 60 each having an upper electrode 62 and a lower electrode, specifically, four light emitting elements 60P, 60Q, 60R, and 60S are mounted on each of the wiring patterns 50P, 50Q, 50R, and 50S. Yes.
As shown by the thick arrows in FIG. 2B, the light emitting device 100 has a current flowing from the terminal 40A + on the left side of the drawing to the terminal 40A- on the right side of the drawing and from the terminal 40B + on the left side of the drawing to the terminal 40B- on the right side of the drawing. A flowing system B. However, the present invention is not limited to this, and the direction of current flow may be reversed.

In this example, a semiconductor laser is used as the light emitting element 60. The light emitting element 60 has a light emitting surface from which laser light is emitted on the side surface, and the light emitting surface is disposed on the fourth side 12D side. However, the present invention is not limited to this, and any other light emitting element such as an LED can be used as the light emitting element 60.
In addition, at least one of the plurality of light emitting elements 60 has a laminated structure of gallium nitride based semiconductors. The light emitting device having a gallium nitride-based semiconductor laminated structure is preferably junction-down mounted. In other words, the p-side electrode is used as the lower electrode and the n-side electrode is used as the lower electrode, resulting in a structure with excellent heat dissipation. . However, the present invention is not limited to this, and the lower electrode may be an n-side electrode and the upper electrode may be a p-side electrode. Further, the light emitting element 60 having a gallium nitride based semiconductor multilayer structure may have a mount material made of aluminum nitride or silicon carbide on the substrate side of the gallium nitride based semiconductor multilayer structure.

  In FIG. 2A, a substrate 80 is shown in which wiring patterns 50 </ b> P to 50 </ b> S having individual substrate materials 82 are arranged side by side. However, the present invention is not limited to this, and each conductive material is formed on one substrate material 82. It is also possible to employ a substrate 80 on which a pattern is arranged. The number of wiring patterns 50 is not limited to four, and any other number of wiring patterns can be used. Examples of the substrate material include aluminum nitride and silicon carbide.

2A shows a substrate on which a plurality of light emitting elements 60P to 60S are arranged, and a substrate 80 in which a plurality of wiring patterns 50P to 50S corresponding to the plurality of light emitting elements 60P to 60S are provided on the upper surface of the substrate 80, respectively. A light emitting device 100 is shown.
Each of the plurality of wiring patterns includes, in two adjacent wiring patterns 50, the first side 12A of one wiring pattern (left wiring pattern in the drawing) and another wiring pattern (right wiring pattern in the drawing). ) Is arranged so as to face the third side 12C.

  Among the plurality of wiring patterns 50P to 50S, the light emitting elements 60P and 60Q placed on the wiring patterns 50P and 50Q emit the same color light (for example, blue light) and are placed on the wiring patterns 50R and 50S. The light emitting elements 60R and 60S emit light of the same color (for example, green light). Therefore, the light emitting elements 60P and 60Q and the light emitting elements 60R and 60S emit light of different colors.

  Here, the light of the same color means light within a wavelength range that can be regarded as light of the same color. For example, blue means light in the wavelength range of 435 to 480 nm, green light means light in the wavelength range of 500 to 560 nm, and red light means that in the wavelength range of 610 to 750 nm. Means light. However, this wavelength range is an example, and other arbitrary wavelength ranges can be set according to the application.

  When the light emitting elements that emit light of the same color arranged adjacent to each other are controlled to emit light at the same time, they can be electrically connected in series. On the other hand, when different controls are performed so that the light emitting elements that emit light of different colors arranged adjacent to each other emit light individually, it is necessary to electrically separate them. Therefore, it is necessary to electrically separate the wiring patterns 50Q and 50R on which the light emitting elements 60Q and 60R that emit light of different colors are mounted.

  Specifically, in the adjacent wiring pattern (first wiring pattern) 50Q and wiring pattern (second wiring pattern) 50R, the contact region 14 (specifically, the contact point) of the wiring pattern (first wiring pattern) 50Q. 10out) and the detouring conduction of the wiring pattern (first wiring pattern) 50R adjacent to the wiring pattern (first wiring pattern) 50Q on the first side 12A side of the wiring pattern (first wiring pattern) 50Q. The body pattern 20 (specifically, the contact point 20 in) is connected by a single wire 70.

  Further, the bypass conductor pattern 20 (specifically, 20out) of the wiring pattern (first wiring pattern) 50Q, and the upper electrode 62 of the light emitting element 60R provided in the wiring pattern (second wiring pattern) 50R, Are connected by a single wire 70.

  On the other hand, between the wiring patterns 50P and 50Q on which the light emitting elements 60P and 60Q emitting the same color light are placed, and between the wiring patterns 50R and 50S on which the light emitting elements 60R and 60S emitting the same color light are placed. Then, they are electrically connected in series.

  Specifically, in the adjacent wiring pattern (third wiring pattern) 50P and wiring pattern (first wiring pattern) 50Q, the contact region 10 (specifically, the contact point) of the wiring pattern (third wiring pattern) 50P. 10out) and the wiring pattern (third wiring pattern) 50P on the first side 12A side of the wiring pattern (third wiring pattern) 50P and the wiring pattern (first wiring pattern) 50Q adjacent to the wiring pattern (third wiring pattern) 50P. The upper electrode 62 of the light emitting element 60 is connected by a single wire 70.

Further, the bypass conductor pattern 20 (specifically, the contact 20out) of the wiring pattern (third wiring pattern) 50P and the bypass conductor pattern 20 (specifically, the contact pattern 20out) of the wiring pattern (first wiring pattern) 50Q. , Contacts 20 in) are connected by a single wire 70.
Similarly, in the adjacent wiring pattern (second wiring pattern) 50R and wiring pattern (fourth wiring pattern) 50S, the contact region 10 (specifically, the contact 10out) of the wiring pattern (second wiring pattern) 50R. And the light emission provided in the wiring pattern (second wiring pattern) 50S adjacent to the wiring pattern (second wiring pattern) 50R on the first side 12A side of the wiring pattern (second wiring pattern) 50R. The upper electrode 62 of the element 60 is connected by a single wire 70, and the detouring conductor pattern 20 (specifically, the contact 20out) of the wiring pattern (second wiring pattern) 50R and the wiring pattern (fourth wiring). Pattern) 50S detour conductor pattern 20 (specifically, contact 20in) is connected by a single wire 70.

In the series A, the contact 40Aout of the terminal 40A + on the left side of the drawing and the contact 20in of the bypass conductor pattern 20 of the wiring pattern 50P are connected by the wire 70, and the contact 10out of the contact region 10 of the wiring pattern 50S on the right side of the drawing The contact 40Ain of the terminal 40A- is connected by a wire 70.
Similarly, in the series B, the contact 40Bout of the terminal 40B + on the left side of the drawing and the upper electrode 62 of the light emitting element 60 placed on the wiring pattern 50P are connected by the wire 70, and the bypass conductive pattern 50S on the right side of the drawing is connected. The contact 20out of the body pattern 20 and the contact 40Ain of the terminal 40B- are connected by a wire 70.

  With the wiring as described above, the light emitting elements 60P and 60Q provided in the wiring patterns 50P and 50Q emit light by the current of the system B, as shown by the thick lines having an arrow at the tip of FIG. On the other hand, the light emitting elements 60R and 60S provided in the wiring patterns 50R and 50S emit light by the current of the system A. Since the light emitting elements 60P and 60Q and the light emitting elements 60R and 60S can individually control light emission, it is possible to realize the light emitting device 100 that emits light of a desired color.

(Light emitting device using multiple wires)
Next, the light emitting device 200 in the case of connecting using a plurality of wires will be described with reference to FIGS. 3A and 3B. In the light emitting device 200, the contact region 14 of the wiring pattern 50Q and the bypass conductor pattern 20 of the wiring pattern 50R are connected by a plurality of wires, and are installed on the bypass conductor pattern 20 and the wiring pattern 50R of the wiring pattern 50Q. The upper electrode 62 of the light emitting element is connected by a plurality of wires. FIG. 3B is a perspective view schematically showing the flow of electricity in the light emitting device 200 shown in FIG. 3A. The thick line (thick arrow) which has an arrow at the front-end | tip of FIG. 3B shows the flow of electricity.

  In the example shown in FIGS. 3A and 3B, FIG. 2A and FIG. 2 are connected by one wire 70 in that each of the contacts or the contacts and the electrodes are electrically connected by three wires 70. Different from the example shown in 2B. This example using a plurality of wires 70 is suitable for the case of using a high-power light-emitting element that flows a large amount of current. A plurality of wires 70 can be connected according to the length of the contact region 10 and the lengths of the first side region 22 and the third side region 26 of the bypass conductor pattern 20. The other points are basically the same as the example shown in FIGS. 2A and 2B, and further description is omitted.

  In the wiring pattern 50 according to the present invention, including other embodiments described later, one end of the bypass conductor pattern 20 located on the third side 12C side is the first side 12A of the bypass conductor pattern 20. It is provided on the fourth side 12D side rather than the other end located on the side. Thereby, even if it is a case where each contact or between a contact and an electrode is electrically connected by the some wire 70, it can prevent effectively that the wires 70 interfere.

  This point will be described with reference to FIG. Here, FIG. 4 is a plan view schematically showing the arrangement of the wires connecting the light emitting elements arranged adjacent to each other. In the wiring pattern 50 on the left side and the center of the drawing, one end of the bypass conductor pattern 20 located on the third side 12C side is the fourth side than the other side located on the first side 12A side. 12D, that is, the third side region 26 has a substantially J-shaped detour conductor pattern 20 extending from the first side region 22 to the fourth side 12D. Have. On the other hand, in the wiring pattern 50 ′ on the right side of the drawing, in the bypass conductor pattern 20 ′, one end located on the third side 12C ′ side and the other end located on the first side 12A ′ side are It is provided at substantially the same position with respect to the fourth side 12D ′. In other words, the third side region 26 ′ has a detour conductor pattern 20 ′ extending on the fourth side 12 D ′ side to the same extent as the first side region 22 ′.

  When the adjacent wiring patterns are electrically separated, the contact 10out of the wiring pattern (first wiring pattern) 50 on the left side of the drawing and the contact 20in of the wiring pattern (second wiring pattern) 50 in the center of the drawing are Electrically connected, the contact 20out of the wiring pattern (first wiring pattern) 50 on the left side of the drawing and the upper electrode 62 of the light emitting element 60 placed on the wiring pattern (second wiring pattern) 50 in the center of the drawing are electrically connected. Connected.

  Therefore, between the wiring pattern 50 at the left side of the drawing in FIG. 4 and the wiring pattern 50 at the center of the drawing, the contact 20in of the wiring pattern (second wiring pattern) 50 at the center of the drawing is connected to the fourth side 12D side of the third side region 26. , The wire 70 connecting the contact 10out of the wiring pattern 50 on the left side of the drawing and the contact 20in of the wiring pattern 50 on the center of the drawing, and the contact 20out of the wiring pattern 50 on the left side of the drawing and the wiring at the center of the drawing. The wires 70 that connect the upper electrodes 62 of the light emitting elements 60 mounted on the pattern 50 can be efficiently arranged without interference.

  On the other hand, between the wiring pattern 50 in the center of the drawing in FIG. 4 and the wiring pattern 50 ′ on the right side of the drawing, the contact 20 in ′ of the wiring pattern (second wiring pattern) 50 ′ on the right side of the drawing is in the third side region 26. Is arranged on the second side 12B side, so that the wire 70 connecting the contact 10out of the wiring pattern 50 in the center of the drawing and the contact 20in 'of the wiring pattern 50' on the right side of the drawing and the contact of the wiring pattern 50 in the center of the drawing. 20 out and the wire 70 which connects the upper electrode 62 'of the light emitting element 60' mounted on the wiring pattern 50 'on the right side of the drawing cause a problem of interference.

  As described above, the wiring pattern (first wiring pattern) 50Q and the adjacent wiring pattern (second wiring pattern) 50R shown in FIG. 2A or FIG. 3A are described with reference to FIG. 1, FIG. 2A, and FIG. It can also be expressed as follows:

  A plurality of light emitting elements 60P to 60S each having an upper electrode 62 and a lower electrode 66, and a substrate 80 on which the plurality of light emitting elements 60P to 60S are arranged, and each of the plurality of light emitting elements 60P to 60S on the upper surface of the substrate 80. In the light-emitting device 100 or the light-emitting device 200 including the substrate 80 provided with the plurality of wiring patterns 50P to 50S corresponding to each of the plurality of wiring patterns 50P to 50S, the lower electrodes 66 of the light-emitting elements 50P to 50S are provided. Are connected, and in the plan view, the light emitting element placement region 12 defined by the first, second, third, and fourth sides 12A to 12D in order, and the first side 12A of the light emitting element placement region A light-emitting element conductor pattern 10 having a contact region 14 connected to a part of the first region, a part of the first side 12A where the contact region 14 does not exist, a second The detour conductor pattern 20 surrounding all of the side 12B and part or all of the third side 12C, and one end of the detour conductor pattern 20 located on the third side 12C side is for detour And a detouring conductor pattern 20 provided on the fourth side 12D side of the other end located on the first side 12A side of the conductor pattern 20, and the first of one wiring pattern The side 12A and the third side 12C of the other one wiring pattern are arranged to face each other, and the plurality of wiring patterns 50P to 50S correspond to the first light emitting element 60Q among the plurality of light emitting elements. One wiring pattern 50Q corresponds to one light emitting element 60R that emits light of a color different from that of the one light emitting element, and the first wiring pattern on the first side of the first wiring pattern Adjacent second The contact region 14 of the first wiring pattern 50Q and the bypass conductor pattern 20 of the second wiring pattern 50R are connected by one or more wires 70, and the first wiring pattern 50R includes the wiring pattern 50R. The bypass conductive pattern 20 of 50Q and the upper electrode 62 of the light emitting element 60R provided in the second wiring pattern 50R are connected by one or more wires 70.

As described above, in the light emitting devices 100 and 200 according to the above-described embodiments and examples, the bypass conductor pattern 20 is disposed so as to surround the light emitting element mounting region 12, and the space generated by the light emitting element 60, in particular, Since the dimensions of the first side 12A and the third side 12C can be effectively used in the space for arranging the wires 70, it is not necessary to arrange the wiring pattern at a position outside the arrangement of the light emitting elements 60, and the compact wiring pattern Can be realized.
In particular, one end of the bypass conductor pattern 20 positioned on the third side 12C side is closer to the fourth side 12D than the other end of the bypass conductor pattern 20 positioned on the first side 12A side. Since the light emitting elements 60 of different colors are arranged adjacent to each other, the compact light emitting device 100 having the compact wiring pattern 50 that does not interfere with each other even when the light emitting elements 60 of different colors are arranged adjacent to each other is provided. realizable.

  Similarly, the wiring pattern (third wiring pattern) 50P and the adjacent wiring pattern (first wiring pattern) 50Q or the wiring pattern (second wiring pattern) 50R and the adjacent wiring pattern shown in FIG. 2A or 3A. The (fourth wiring pattern) 50S can also be expressed as follows with reference to FIGS. 1, 2A and 3. FIG.

  A plurality of light emitting elements 60P to 60S each having an upper electrode 62 and a lower electrode 66, and a substrate 80 on which the plurality of light emitting elements 60P to 60S are arranged, and each of the plurality of light emitting elements 60P to 60S on the upper surface of the substrate 80. And the substrate 80 provided with the plurality of wiring patterns 50P to 50S corresponding to each of the plurality of wiring patterns 50P to 50S are connected to the lower electrodes 66 of the light emitting elements 60P to 60S. In addition, the light emitting element placement region 12 defined by the first, second, third, and fourth sides 12A to 12D in order in plan view, and one of the first sides 12A of the light emitting element placement region 12 A light-emitting element conductor pattern 10 having a contact region 14 connected to the portion, a part of the first side 12A where the contact region 14 does not exist, and a second side 12B. The detouring conductor pattern 20 that surrounds all or a part or all of the third side 12C, and one end of the detouring conductor pattern 20 positioned on the third side 12C side is the detouring conductor pattern 20 and a bypass conductor pattern 20 provided on the fourth side 12D side rather than the other end located on the first side 12A side, and one wiring in two adjacent wiring patterns The first side 12A of the pattern and the third side 12C of the other wiring pattern are arranged to face each other, and one of the plurality of wiring patterns emits light corresponding to the first wiring pattern 50Q. A third wiring pattern 50P that corresponds to a light emitting element that emits light of the same color as the element 60Q and that is adjacent to the first wiring pattern 50Q on the third side 12C side of the first wiring pattern 50Q; Furthermore, the contact area 14 of the third wiring pattern 50P and the upper electrode 62 of the light emitting element 60Q provided in the first wiring pattern 50Q are connected by one or more wires 70, and the third wiring pattern 50P. The bypass conductor pattern 20 of the first wiring pattern 50Q and the bypass conductor pattern 20 of the first wiring pattern 50Q are connected by one or more wires 70, and one of the plurality of wiring patterns is a plurality of wirings. The pattern corresponds to a light emitting element that emits light of the same color as the light emitting element 60R corresponding to the second wiring pattern 50R, and the second wiring pattern 50R on the first side 12A side of the second wiring pattern 50R. And a fourth wiring pattern 50S adjacent to the contact region 14 of the second wiring pattern 50R and the light emitting element 60S provided in the fourth wiring pattern 50S. The upper electrode 62 is connected by one or more wires 70, and the bypass conductor pattern 20 of the second wiring pattern 50R and the bypass conductor pattern of the fourth wiring pattern 50S are one or more wires 70. It is connected.

  As described above, the adjacent light emitting elements 60 can be electrically connected in series using the same wiring pattern 50, or can be separated from each other, so that light of various colors can be emitted at a desired timing. A compact light-emitting device can be provided at a low manufacturing cost.

  The same wiring pattern 50 can be used to connect the contacts or between the contacts and the electrodes with a single wire 70 or with a plurality of wires 70, which is optimal according to the drive current of the light emitting element 60. Wiring can be realized efficiently.

  As described above, the light emitting element 50 has a light emitting surface on the side surface, the light emitting surface is disposed on the fourth side 12D side, and the wiring pattern 50 includes the first side excluding the fourth side 12D. 12A, the second side 12B, and the third side 12C. Therefore, it is possible to realize a high-performance light-emitting device 100 in which outgoing light is not interfered by the wiring pattern 50, the wire 70, or the like.

  Note that the bypass conductor pattern 20 surrounding the light emitting element placement region 12 of the light emitting element conductor pattern 10 may have a plurality of bypass conductor patterns as shown in FIG.

(When having a bypass wire)
Next, the light emitting device 300 having a bypass wire will be described with reference to FIGS. 5A and 5B. Here, FIG. 5A is a plan view schematically showing an example of the light-emitting device 300 using the wiring pattern according to the first embodiment of the present invention, in which the bypass conductor pattern has a bypass wire. . FIG. 5B is a perspective view for explaining a bypass wire in the light-emitting device 300 shown in FIG. 5A.

  In the example shown in FIGS. 5A and 5B, the wiring patterns 50P to 50S are connected using a plurality of wires, and are basically the same as the example shown in FIGS. 3A and 3B. The difference from the example shown in FIGS. 3A and 3B is that each wiring pattern 50P to 50S is provided with a wire 70 for bypassing. In the following description, the bypass wire 70 will be described. Since other points are the same as described above, further description is omitted.

  As shown by an arrow X or X ′ in FIG. 5B, a bypass wire 70 that electrically connects two points of the bypass conductor pattern 20 is connected. More specifically, a bypass wire 70 indicated by an arrow X connecting the contact 20by1 and the contact 20by2 and a bypass wire 70 indicated by an arrow X 'connecting the contact 20by1' and the contact 20by2 'are provided. Therefore, by connecting the two points of the bypass conductor pattern 20 with the bypass wire 70, the cross-sectional area through which the current flows is added to the cross-sectional area of the conductive layer of the bypass conductor pattern 20 and the wire 70 is disconnected. Since the area is added, the electrical resistance can be reduced. The cross-sectional area of the bypass wire 70 is preferably larger than the cross-sectional area of the conductive layer constituting the bypass conductor pattern 20. The effect of reducing the resistance can be obtained.

  Therefore, this example is particularly effective when using a high-power light-emitting element that needs to pass a high current. In the example shown in FIGS. 5A and 5B, one bypass wire 70 is used. However, the present invention is not limited to this, and a plurality of wires 70 can be used between two points of the detour conductor pattern 20. You can also connect and bypass.

[Light Emitting Device According to Second Embodiment of the Present Invention]
Next, the wiring pattern 450 used in the light emitting device 400 according to the second embodiment of the present invention will be described with reference to FIG. FIG. 6 is a plan view schematically showing a wiring pattern 450 according to the second embodiment of the present invention.

  The wiring pattern 450 used in the light emitting device 400 according to the present embodiment has a second side 12B of the bypass conductor pattern 20 as compared with the wiring pattern used in the light emitting device according to the first embodiment shown in FIG. Is different in that the second side region 24 opposite to the outer region 24 extends outward (side away from the light emitting element mounting region 12). In the following, the connection of the wire 70 in the second side region 24 having a larger region will be described. Since other points are the same as described above, further description is omitted.

(Light emitting device using multiple wires)
Next, the light-emitting device 400 according to the second embodiment of the present invention will be described with reference to FIGS. 7A and 7B. Here, a case where a plurality of wires are used for connection will be described as an example, but a case where a single wire is used for connection is also the same. FIG. 7A is a plan view schematically showing the light emitting device 400. In the light emitting device 400, the contact region 14 of the wiring pattern 450Q and the bypass conductor pattern 20 of the wiring pattern 450R are connected by a plurality of wires, and are installed on the bypass conductor pattern 20 and the wiring pattern 450R of the wiring pattern 450Q. The upper electrode 62 of the light emitting element is connected by a plurality of wires. FIG. 7B is a perspective view schematically showing the flow of electricity in the light-emitting device 400 shown in FIG. 7A. The thick line (thick arrow) which has an arrow at the front-end | tip of FIG. 7B shows the flow of electricity.
The other wiring patterns are the adjacent wiring patterns (450P and 450Q), (450R and 450S), and (450S and 450T), respectively (the bypass conductor pattern and the bypass conductor pattern), A combination of the contact region and the upper electrode of the light emitting element is connected by a plurality of wires 70.

  In the light emitting device 400 shown in FIG. 7A and FIG. 7B, the second side region 24 of the detouring conductor pattern 20 of the wiring patterns 450P to 450T extends outward. An inter-connection wire 70 can be disposed. In the detour conductor pattern 20 of the wiring pattern 450 according to the first embodiment shown in FIGS. 3A and 3B, the current flows from the contact 20 in located on the fourth side 12 </ b> D side of the third side region 26. It flows from the end portion to the end portion in the bypass conductor pattern 20 up to the contact point 20out of the first side region 22.

  On the other hand, in the bypass conductor pattern 20 of the wiring patterns 450P to 450T according to the second embodiment shown in FIGS. 7A and 7B, the current is located on the fourth side 12D side of the third side region 26. From the contact point 20 in to the contact point 20 out of the second side region 24, it flows in the bypass conductor pattern 20, and then flows to the adjacent wiring pattern 450 with the wire 70. Therefore, the distance through which the current flows in the bypass conductor pattern 20 is shortened, and then flows in the wire 70 having a larger cross-sectional area, so that the electrical resistance can be reduced. Therefore, this example is also effective when using a high-power light-emitting element that requires a high current to flow.

  In particular, in the detour conductor pattern 20, the position of the ingress contact 20 in where the current flows from the front wiring pattern 450 through the wire 70 and the outflow contact 20 out where the current flows out to the next wiring pattern 450 through the wire 70. Since the positions are adjacent to each other (see, for example, circuit patterns 450R, 450S, and 450T), the electrical resistance can be effectively reduced.

[Light Emitting Device According to Third Embodiment of the Present Invention]
Next, a light emitting device 500 according to a third embodiment of the present invention will be described with reference to FIG. FIG. 8 is a plan view schematically showing a wiring pattern used in the light emitting device 500 according to the third embodiment of the present invention.

  In the wiring pattern 550 used in the light emitting device 500 according to the present embodiment, the first bypass conductor pattern 20 and the second bypass conductor pattern 30 are arranged so as to surround the light emitting element placement region 12. This is different from the wiring patterns according to the first and second embodiments described above.

  More specifically, the wiring pattern 550 is connected to the lower electrode of the light emitting element in the same manner as the wiring pattern described above, and sequentially has a first side 12A, a second side 12B, a third side 12C, and A light-emitting element conductor pattern 10 having a light-emitting element placement area 12 defined by the fourth side 12D and a contact area 14 connected to a part of the first side 12A of the light-emitting element placement area 12 Have.

  The wiring pattern 550 further includes a first bypass conductor surrounding a part of the first side 12A, the whole of the second side 12B, and a part or the whole of the third side 12C where the contact region 14 does not exist. It has a pattern 20 and a second bypass conductor pattern 30. The second bypass conductor pattern 30 is arranged outside the first bypass conductor pattern 20 with a predetermined distance therebetween.

  The first bypass conductor pattern 20 includes a first side region 22, a second side region 24, and a first side region 22 that face the first side 12 </ b> A, the second side 12 </ b> B, and the third side 12 </ b> C, respectively. The third side region 26 is configured. In addition, the second bypass conductor pattern 30 is provided on the first side side facing the outer sides of the first side region 22, the second side region 24, and the third side region 26. The region 32 is composed of a second side region 34 and a third side region 36.

  In either of the bypass conductor patterns 20 and 30, one end of the bypass conductor pattern 20 (30) located on the third side 12C side is the first side of the bypass conductor pattern 20 (30). It is provided on the fourth side 12D side rather than the other end located on the 12A side. That is, the detouring conductor pattern 20 (30) includes the first side region 22 (32) and the third side region 22 (32) that extends longer to the fourth side 12D side than the first side region 22 (32). The side region 26 (36) of the second side region has a planar shape connected via the second side region 24 (34).

  As for the connection of the wires in the wiring pattern 550 arranged adjacent to each other, the connection of the wire 70 similar to the above-described wiring pattern can be performed for each of the bypass conductor patterns 20 and 30. Therefore, further detailed description regarding the connection of the wire 70 is omitted.

(Light emitting device using one wire)
Next, a light emitting device 500 including a plurality of wiring patterns 550P to 550S will be described with reference to FIGS. 9A and 9B. In the light emitting device 500, the contact region 14 of the wiring pattern 550P and the bypass conductor pattern 20 of the wiring pattern 550Q are connected by a single wire, and are placed on the bypass conductor pattern 30 and the wiring pattern 550Q of the wiring pattern 550P. The upper electrode 62 of the light emitting element is connected by a single wire, and the bypass conductor pattern 20 of the wiring pattern 550P and the bypass conductor pattern 30 of the wiring pattern 550Q are connected by a single wire. In addition, the contact region 14 of the wiring pattern 550R and the bypass conductor pattern 20 of the wiring pattern 550S are connected by a single wire, and are placed on the bypass conductor pattern 30 and the wiring pattern 550S of the wiring pattern 550R. The upper electrode 62 of the light emitting element is connected by a single wire, and in addition, a bypass conductor of the wiring pattern 550R The pattern 20 and the bypass conductor pattern 30 of the wiring pattern 550S are connected by a single wire. Here, for the sake of simplicity, the case of connecting using a single wire will be described, but the same applies to the case of connecting using a plurality of wires. FIG. 9B is a perspective view schematically showing the flow of electricity in the light-emitting device 500 shown in FIG. 9A. The thick line (thick arrow) which has an arrow at the front-end | tip of FIG. 9B shows the flow of electricity.
In the other adjacent wiring pattern, the contact region 14 of the wiring pattern 550Q and the upper electrode 62 of the light emitting element placed on the wiring pattern 550R are connected by a single wire, and the detour conductor pattern of the wiring pattern 550Q. 20 and the bypass conductor pattern 30 of the wiring pattern 550R are connected by a single wire 70, and the bypass conductor pattern 30 of the wiring pattern 550Q and the bypass conductor pattern 30 of the wiring pattern 550R are one wire. It is connected with.

  In this example, a substrate 80 in which four wiring patterns 550P, 550Q, 550R, and 550S are arranged in a line is provided between the terminal 40+ arranged at both ends and the terminal 40-. A plurality of light emitting elements 60P, 60Q, 60R, and 60S each having an upper electrode 62 and a lower electrode are mounted on each of the wiring patterns 550P, 550Q, 550R, and 550S. In this example, a system A in which current flows from a terminal 40A + on the left side of the drawing to a terminal 40A- on the right side of the drawing, a system B in which current flows from a terminal 40B + on the left side of the drawing to a terminal 40B- on the right side of the drawing, and a terminal 40C + on the left side of the drawing. And a system C through which a current flows to a terminal 40C- on the right side of the drawing. However, the present invention is not limited to this, and the direction of current flow may be reversed.

  Since the wiring pattern 550 used in the light emitting device 500 according to the third embodiment of the present invention includes the two detouring conductor patterns 20 and 30, the wiring pattern 550 includes three current systems, and thus three different colors. The light emitting device 500 that independently controls the light emitting element 60 that emits light can be realized. For example, among the plurality of wiring patterns 550P to 550S, the light emitting element 60P placed on the wiring pattern 550P emits blue light, and the light emitting elements 60Q and 60R placed on the wiring patterns 550Q and 550R both emit green light. The light emitting element 60S placed on the wiring pattern 550S can emit red light.

  Next, the flow of electricity in the light emitting device 500 will be described with reference to FIG. 9B. 9B, the light emitting element 60P provided in the wiring pattern 550P emits light by the current system C, as indicated by a thick line having an arrow at the tip. The light emitting elements 60Q and 60R provided in the wiring patterns 550Q and 550R emit light by the current system B. Further, the light emitting element 60S provided in the wiring pattern 550S emits light by the current system A. Thereby, the light emitting element 60P, the light emitting elements 60Q and 60R, and the light emitting element 60S can individually control light emission. Therefore, the light emitting device 500 that emits light of any desired color including white can be realized.

By using the wiring pattern used in the light emitting device 500 according to the third embodiment of the present invention, for example, the color of light emitted with respect to the center is arranged symmetrically, and the light emitting element is individually controlled for each color emitted. A light emitting device that performs the above can be realized.
In the present embodiment, the wiring pattern 550 in which the two detouring conductor patterns 20 and 30 are arranged so as to surround the light emitting element mounting region 10 is shown, but the present invention is not limited to this. It is also possible to employ a wiring pattern in which an arbitrary number of three or more bypassing conductor patterns are arranged so as to surround the light emitting element mounting region.

[substrate]
As described above, by arranging a plurality of wiring patterns 50 used in the light emitting devices 100 to 500 according to the first, second, or third embodiment of the present invention, the light emitting elements 60 arranged in a row are electrically connected. It is possible to obtain the substrate 80 that can be connected in series or can be separated.

  That is, the substrate 80 according to the present embodiment is a substrate 80 having a plurality of wiring patterns 50, 450, 550, and each of the plurality of wiring patterns 50, 450, 550 is in order of the first side 12A in plan view. , The light emitting element placement region 12 defined by the second side 12B, the third side 12C, and the fourth side 12D, and the contact region connected to a part of the first side 12A of the light emitting element placement region 12 14 and a detour surrounding a part of the first side 12A, the whole of the second side 12B, and the part of or the whole of the third side 12C where no contact region exists. The conductive conductor pattern 20 (30), one end of the bypass conductor pattern 20 (30) located on the third side 12C side is the first side 12A of the bypass conductor pattern 20 (30) Located on the side of Than that the other end has a fourth side 12D bypass conductor pattern 20 provided on the side of (30), the. In the two adjacent wiring patterns 50, 450, and 550, the first side 12A of one wiring pattern and the third side 12C of the other wiring pattern are arranged to face each other.

  In this substrate 80, the bypass conductor pattern 20 (30) is disposed so as to surround the light emitting element mounting region 10, so that the space (the first side 12 </ b> A and the third side 12 </ b> C) generated by the light emitting element 60. Can be effectively utilized in the space for arranging the wire 70, so that it is not necessary to arrange the wiring pattern at a position away from the light emitting element, and a compact wiring pattern can be realized. By the detouring conductor pattern 20 (30) arranged so as to surround, the light emitting elements arranged in a row can be electrically connected in series or can be separated.

  The substrate 80 according to the present embodiment is not limited to the illustrated case, and an arbitrary number of wiring patterns can be arranged. In addition, it is possible to employ a substrate in which conductive patterns each having a substrate material are arranged side by side, or it is possible to employ a substrate in which each conductive pattern is arranged on one substrate material. In addition, the wiring patterns 50, 450, and 550 according to the first to third embodiments described above can be combined and arranged in one substrate.

  Although the embodiments and embodiments of the present invention have been described, the disclosed contents may vary in the details of the configuration, and combinations of elements and changes in the order of the embodiments, embodiments, etc. are claimed in the present invention. It can be realized without departing from the scope and spirit of the present invention.

DESCRIPTION OF SYMBOLS 10 Light emitting element conductor pattern 10in, 10out Contact 12 Light emitting element mounting area | region 12A 1st edge | side 12B 2nd edge | side 12C 3rd edge | side 12D 4th edge | side 14 Contact area | region 20 (1st) detour conductor Pattern 20in, 20out, 20by1, 20by2 Contact 22 First side region 24 Second side region 26 Third side region 30 Second detour conductor pattern 30in, 30out Contact 32 First side region 34 Second side region 36 Third side region 40A to C + Terminal 40A to C- Terminal 40in, 40out Contact 50, 50P to 50S, 450P to 450T, 550P to 550S Wiring pattern 60, 60P to 60T Light emitting element 62 Upper electrode 64 Element body 66 Lower electrode 80 Substrate
82 Substrate material 100, 200, 300, 400, 500 Light emitting device

Claims (7)

A plurality of light emitting elements each having an upper electrode and a lower electrode;
A substrate on which the plurality of light emitting elements are arranged, and a substrate provided with a plurality of wiring patterns corresponding to the plurality of light emitting elements on an upper surface of the substrate,
Each of the plurality of wiring patterns is
The lower electrode of the light emitting element is connected, and the light emitting element placement area defined by the first, second, third and fourth sides in order in plan view, and the light emitting element placement area of the light emitting element placement area A contact region connected to a part of one side, and a light-emitting element conductor pattern,
A detour conductor pattern surrounding a part of the first side, the whole of the second side, and a part or all of the third side where the contact region does not exist, wherein the detour conductor One end of the pattern located on the side of the third side has a bypass conduction provided on the side of the fourth side of the other end of the bypass conductor pattern located on the side of the first side. And having a body pattern,
The first side of one wiring pattern and the third side of the other wiring pattern are arranged to face each other,
The plurality of wiring patterns correspond to a first wiring pattern corresponding to one light emitting element among the plurality of light emitting elements and another light emitting element that emits light of a color different from that of the one light emitting element. And a second wiring pattern adjacent to the first wiring pattern on the first side side of the first wiring pattern,
The contact region of the first wiring pattern and the bypass conductor pattern of the second wiring pattern are connected by one or more wires, and the bypass conductor pattern of the first wiring pattern A light emitting device, wherein the upper electrode of the light emitting element provided in the second wiring pattern is connected by one or more wires.
The plurality of wiring patterns correspond to light emitting elements that emit light of the same color as the light emitting elements corresponding to the first wiring pattern, and the first side of the first wiring pattern on the third side side. A wiring pattern and a third wiring pattern adjacent to the wiring pattern;
The contact region of the third wiring pattern and the upper electrode of the light emitting element provided in the first wiring pattern are connected by one or more wires, and the bypass conductive of the third wiring pattern The light emitting device according to claim 1, wherein the body pattern and the detour conductor pattern of the first wiring pattern are connected by one or more wires.
The plurality of wiring patterns correspond to light emitting elements that emit light of the same color as the light emitting elements corresponding to the second wiring pattern, and the second side of the second wiring pattern is the second side. A wiring pattern and a fourth wiring pattern adjacent to the wiring pattern;
The contact region of the second wiring pattern and the upper electrode of the light emitting element provided in the fourth wiring pattern are connected by one or more wires, and the bypass conductive of the second wiring pattern The light-emitting device according to claim 1, wherein the body pattern and the bypass conductor pattern of the fourth wiring pattern are connected by one or more wires.
The light emitting device according to any one of claims 1 to 3, wherein the one or more wires are a plurality of wires.
5. The light-emitting device according to claim 1, wherein the light-emitting element has a light-emitting surface on a side surface, and the light-emitting surface is disposed on the side of the fourth side.
6. The light emitting device according to claim 1, wherein at least one of the plurality of light emitting elements has a laminated structure of a gallium nitride based semiconductor, the lower electrode is a p-side electrode, and the upper electrode is an n-side electrode. The light-emitting device of any one of Claims.
A substrate having the plurality of wiring patterns,
Each of the plurality of wiring patterns is
A light emitting element placement region defined by first, second, third and fourth sides in order in plan view, and a contact region connected to a part of the first side of the light emitting element placement region; A light-emitting element conductor pattern having
A detour conductor pattern surrounding a part of the first side, the whole of the second side, and a part or all of the third side where the contact region does not exist, wherein the detour conductor One end of the pattern located on the side of the third side has a bypass conduction provided on the side of the fourth side of the other end of the bypass conductor pattern located on the side of the first side. And having a body pattern,
The board | substrate arrange | positioned so that the said 1st edge | side of one wiring pattern and the said 3rd edge | side of another one wiring pattern may oppose.