JP2020205327A - Light-emitting device - Google Patents

Abstract

To provide a light-emitting device which enables adjustment of emission colors and has high color mixing properties.SOLUTION: A light-emitting device 1 comprises, on a substrate 10: a first mounting region 21; a second mounting region 22 which is adjacent to the first mounting region 21 and has the same planar shape as that of the first mounting region 21; and a third mounting region 23 which is adjacent to both of the first mounting region 21 and the second mounting region 22, and has the same planar shape as those of the first mounting region 21 and the second mounting region 22. In each of the mounting regions, there are mounted a plurality of first light-emitting elements 11 for emitting light in a first color, a plurality of second light-emitting elements 12 for emitting light in a second color, and a plurality of third light-emitting elements 13 for emitting light in a third color. The first light-emitting elements 11, the second light-emitting elements 12, and the third light-emitting elements 13 are symmetrically arranged with respect to the first mounting region 21 to the third mounting region 23.SELECTED DRAWING: Figure 1

Description

The present invention relates to a light emitting device.

In a light emitting device having a plurality of mounting regions, a technique is known in which the periphery of each of the plurality of mounting regions is divided by a dam material, which is also called a white resin. For example, in Patent Document 1, a plurality of light emitting elements are arranged in each of three mounting regions having a fan-shaped planar shape surrounded by a dam material, and a power feeding unit that supplies voltage to the plurality of light emitting elements is centered. A light emitting device that emits circular light by arranging the light emitting device is described. In the light emitting device described in Patent Document 1, a uniform light distribution performance is realized by arranging a power feeding unit that does not emit light at the center and arranging a mounting area around the power feeding unit. Further, in paragraph (0064) of Patent Document 1, by causing each of the three fan-shaped mounting regions to emit light in different colors, red, green, and blue emission colors, light bulb colors, neutral white, and daylight colors are provided. It is described that it is possible to create various lighting environments having high color rendering properties with color variations such as.

JP-A-2010-97890

However, in the light emitting device described in Patent Document 1, when each of the plurality of mounting regions divided by the dam material is made to emit light with different colors, the light emission of each color is completely mixed by a diffusion member such as a glove before irradiation. If possible, there is no problem, but sufficient color mixing cannot be expected in a situation where the light emitting regions of different colors are separated and the light emitting regions and the diffusing member are close to each other.

An object of the present invention is to provide a light emitting device capable of adjusting a light emitting color and having a high color mixing property even if a plurality of mounting areas divided by a dam material are provided.

The light emitting device according to the present invention covers both the first mounting region, the second mounting region adjacent to the first mounting region and having the same planar shape as the first mounting region, and the first mounting region and the second mounting region. A substrate having a third mounting area that is adjacent to each other and has the same planar shape as the first mounting area and the second mounting area, and a first mounting area, a second mounting area, and a third mounting area, respectively. A plurality of first light emitting elements that emit light in one color, and a plurality of second light emitting elements that are arranged in the first mounting region, the second mounting region, and the third mounting region, and emit light in a second color different from the first color. A plurality of third light emitting elements arranged in the first mounting region, the second mounting region, and the third mounting region, respectively, and emitting light in a third color different from both the first color and the second color. It has a first light emitting element, a plurality of second light emitting elements, and a sealing material for sealing a plurality of third light emitting elements, and is arranged in the first mounting region, the second mounting region, and the third mounting region, respectively. Arrangement shapes of a plurality of first light emitting elements, arrangement shapes of a plurality of second light emitting elements arranged in the first mounting area, the second mounting area, and the third mounting area, respectively, and the first mounting area, the second mounting area, and the like. The arrangement shapes of the plurality of third light emitting elements arranged in the third mounting region are arranged on the substrate so as to have mutual symmetry.

Further, in the light emitting device according to the present invention, the arrangement shapes of the plurality of first light emitting elements arranged in the first mounting region, the second mounting region, and the third mounting region, the first mounting region, the second mounting region, and the first The arrangement shape of the plurality of second light emitting elements arranged in each of the three mounting regions and the arrangement shape of the plurality of third light emitting elements arranged in the first mounting region, the second mounting region, and the third mounting region are the first. It is preferable that they are arranged on the substrate so as to be point-symmetric with respect to the center points of the 1st mounting area, the 2nd mounting area, and the 3rd mounting area.

Further, in the light emitting device according to the present invention, each of the first mounting region, the second mounting region, and the third mounting region has a fan-shaped planar shape, and in the first mounting region, a plurality of first light emitting elements, a plurality of The second light emitting element and the plurality of third light emitting elements are arranged in this order from the center point toward the outer periphery, and in the second mounting region, the plurality of second light emitting elements, the plurality of third light emitting elements, and the plurality of first light emitting elements are arranged. The light emitting elements are arranged in this order from the center point toward the outer periphery, and in the third mounting region, the plurality of third light emitting elements, the plurality of first light emitting elements, and the plurality of second light emitting elements are arranged in this order from the center point toward the outer periphery. It is preferable to be arranged.

Further, in the light emitting device according to the present invention, in the first mounting region, a plurality of first light emitting elements are further arranged on the outer peripheral side of the plurality of third light emitting elements, and in the second mounting region, a plurality of second light emitting elements are provided. It is preferable that the plurality of third light emitting elements are further arranged on the outer peripheral side of the plurality of first light emitting elements, and the plurality of third light emitting elements are further arranged on the outer peripheral side of the plurality of second light emitting elements in the third mounting region.

Further, in the light emitting device according to the present invention, each of the plurality of first light emitting elements emits blue light, each of the plurality of second light emitting elements emits red light, and each of the plurality of third light emitting elements emits red light. It is preferable to emit near-infrared light.

Further, the light emitting device according to the present invention further includes a plurality of fourth light emitting elements that emit light of a fourth color different from any of the first color, the second color, and the third color, and the substrate is a first mounting area. , A fourth mounting area having the same planar shape as the second mounting area and the third mounting area is further provided, and arranged in the first mounting area, the second mounting area, the third mounting area, and the fourth mounting area, respectively. Arrangement shape of a plurality of first light emitting elements, arrangement shape of a plurality of second light emitting elements arranged in the first mounting area, the second mounting area, the third mounting area, and the fourth mounting area, respectively, the first mounting area, the first The arrangement shapes of the plurality of third light emitting elements arranged in the two mounting areas, the third mounting area, and the fourth mounting area, respectively, and the first mounting area, the second mounting area, the third mounting area, and the fourth mounting area, respectively. It is preferable that the arranged shapes of the plurality of arranged fourth light emitting elements are arranged on the substrate so as to have mutual symmetry.

Further, in the light emitting device according to the present invention, the arrangement shape, the first mounting area, and the first mounting area of a plurality of first light emitting elements arranged in the first mounting area, the second mounting area, the third mounting area, and the fourth mounting area, respectively. Arrangement shapes of a plurality of second light emitting elements arranged in the two mounting areas, the third mounting area, and the fourth mounting area, respectively, arranged in the first mounting area, the second mounting area, the third mounting area, and the fourth mounting area. The arrangement shape of the plurality of third light emitting elements and the arrangement shape of the plurality of fourth light emitting elements arranged in the first mounting area, the second mounting area, the third mounting area, and the fourth mounting area are the first. It is preferable that they are arranged on the substrate so as to be point-symmetrical with respect to the center points of the mounting area, the second mounting area, the third mounting area, and the fourth mounting area.

Further, in the light emitting device according to the present invention, the arrangement shape, the first mounting area, and the first mounting area of a plurality of first light emitting elements arranged in the first mounting area, the second mounting area, the third mounting area, and the fourth mounting area, respectively. Arrangement shapes of a plurality of second light emitting elements arranged in the two mounting areas, the third mounting area, and the fourth mounting area, respectively, arranged in the first mounting area, the second mounting area, the third mounting area, and the fourth mounting area, respectively. The arrangement shape of the plurality of third light emitting elements and the arrangement shape of the plurality of fourth light emitting elements arranged in the first mounting area, the second mounting area, the third mounting area, and the fourth mounting area are the first. It is preferable that they are arranged on the substrate so as to be line-symmetric with respect to the axis of symmetry extending between the mounting area, the second mounting area, the third mounting area, and the fourth mounting area.

Even if the light emitting device according to the present invention includes a plurality of mounting areas divided by a dam material, the light emitting color can be adjusted and the color mixing property is improved.

(A) is a plan view of the light emitting device according to the first embodiment, and (b) is a cross-sectional view taken along the line AA'shown in (a). (A) is a perspective plan view of the dam material in FIG. 1, and (b) is a cross-sectional view taken along the line AA'shown in (a). It is a top view of the substrate shown in FIG. FIG. 3 is a plan view showing a connection relationship between the first light emitting element shown in FIG. 1 and the first anode electrode and the first cathode electrode. FIG. 3 is a plan view showing a connection relationship between the second light emitting element shown in FIG. 1 and the second anode electrode and the second cathode electrode. FIG. 3 is a plan view showing a connection relationship between the third light emitting element shown in FIG. 1 and the third anode electrode and the third cathode electrode. (A) is a plan view of the light emitting device according to the second embodiment, and (b) is a cross-sectional view taken along the line AA'shown in (a). It is a figure which shows an example of the wavelength distribution of the light emitted from the light emitting device shown in FIG. 7. (A) is a plan view of the light emitting device according to the third embodiment, and (b) is a cross-sectional view taken along the line AA'shown in (a). FIG. 9 is a diagram (No. 1) showing a step of forming the third light emitting element shown in FIG. 9, FIG. 9A is a plan view of a mask and a light emitting device shown in FIG. 9, and FIG. 9B is A- It is sectional drawing of the manufacturing apparatus along the A'line and the light emitting apparatus shown in FIG. 9 is a diagram (No. 2) showing a process of forming the second light emitting element shown in FIG. 9, FIG. 9A is a plan view of a mask and a light emitting device shown in FIG. 9, and FIG. 9B is A-A of FIG. 9A. It is sectional drawing of the manufacturing apparatus along the A'line and the light emitting apparatus shown in FIG. 9 is a diagram (No. 3) showing a process of forming the second light emitting element shown in FIG. 9, FIG. 9A is a plan view of the light emitting device shown in FIG. 9, and FIG. 9B is AA ′ of FIG. 9A. It is a cross-sectional view along the line. FIG. 9 is a diagram (No. 1) showing a step of forming the third light emitting element shown in FIG. 9, FIG. 9A is a plan view of a mask and a light emitting device shown in FIG. 9, and FIG. 9B is A-A of FIG. 9A. It is sectional drawing of the manufacturing apparatus along the A'line and the light emitting apparatus shown in FIG. 9 is a diagram (No. 2) showing a process of forming the third light emitting element shown in FIG. 9, FIG. 9A is a plan view of a mask and a light emitting device shown in FIG. 9, and FIG. 9B is A- It is sectional drawing of the manufacturing apparatus along the A'line and the light emitting apparatus shown in FIG. 9 is a diagram (No. 3) showing a process of forming the third light emitting element shown in FIG. 9, FIG. 9A is a plan view of the light emitting device shown in FIG. 9, and FIG. 9B is AA ′ of FIG. 9A. It is a cross-sectional view along the line. It is a figure which shows the arrangement shape of the light emitting element which concerns on the modification, (a) shows the 1st modification, (b) shows the 2nd modification, (c) shows the 3rd modification, (d). ) Indicates a fourth modification, and (e) indicates a fifth modification.

The light emitting device according to the present invention will be described below with reference to the drawings. However, it should be noted that the technical scope of the present invention is not limited to those embodiments, but extends to the inventions described in the claims and their equivalents.

(Configuration and function of light emitting device according to the first embodiment)
FIG. 1A is a plan view of the light emitting device 1 according to the first embodiment, and FIG. 1B is a cross-sectional view taken along the line AA'shown in FIG. 1A. FIG. 2A is a perspective plan view of the dam material in FIG. 1, and FIG. 2B is a cross-sectional view taken along the line AA'shown in FIG. 2A.

The light emitting device 1 includes a substrate 10, a plurality of first light emitting elements 11, a plurality of second light emitting elements 12, a plurality of third light emitting elements 13, a dam material 14, a sealing material 15, and a first Zener. It has a diode 16, a second Zener diode 17, and a third Zener diode 18. The light emitting device 1 is a COB (Chip on Board) type light emitting device. In addition, in FIGS. 1 and 2, the plurality of first light emitting elements 11 are indicated by "B", the plurality of second light emitting elements 12 are indicated by "G", and the plurality of third light emitting elements 13 are indicated by "R". (The same applies to FIGS. 3 to 6). The light emitting device 1 is attached to a member constituting a luminaire through a guide hole 10c provided at an end portion.

The board 10 has a mounting board 10a and a circuit board 10b. The mounting substrate 10a is formed of a metal such as aluminum, and a plurality of first light emitting elements 11, a plurality of second light emitting elements 12, and a plurality of third light emitting elements 13 are mounted. The plurality of first light emitting elements 11, the plurality of second light emitting elements 12, and the plurality of third light emitting elements 13 are directly bonded to the mounting substrate 10a by a die bonding material such as a silicone adhesive.

FIG. 3 is a plan view of the substrate 10.

In the substrate 10 shown in FIG. 3, the circuit board 10b (see FIG. 1) is formed of an epoxy glass resin or the like and has three fan-shaped openings. When the circuit board 10b is attached to the mounting board 10a (see FIG. 1), the first mounting area 21, the second mounting area 22, and the third mounting area 23 are exposed from the respective openings. The circular region of the mounting board 10a including the first mounting region 21, the second mounting region 22, and the third mounting region 23 is referred to as a mounting region 20.

With reference to the first to third mounting areas 21 to 23, the process returns to FIGS. 1 and 2 and each member will be described. As shown in FIG. 1, a plurality of first light emitting elements 11, a plurality of second light emitting elements 12, and a plurality of third light emitting elements arranged in the first mounting region 21, the second mounting region 22, and the third mounting region 23, respectively. The elements 13 are arranged on the substrate 10 so as to have symmetry with each other. Specifically, the arrangement shapes of the plurality of first light emitting elements 11, the plurality of second light emitting elements 12, and the plurality of third light emitting elements 13 are the first mounting region 21, the second mounting region 22, and the second. 3 The mounting area 23 is point-symmetrical (1/3 rotationally symmetric) with respect to the center point of the mounting area 20.

That is, in the first mounting region 21 having a fan-shaped planar shape with a central angle of 120 °, a plurality of first light emitting elements 11, a plurality of second light emitting elements 12, a plurality of third light emitting elements 13, and a plurality of first light emitting elements The elements 11 are sequentially arranged from the center point toward the outer circumference. In the first mounting area 21, the plurality of first light emitting elements 11 arranged near the central portion of the mounting area 20 are arranged in a fan shape, and the plurality of second light emitting elements 12, the plurality of third light emitting elements 13, and the mounting area are arranged. The plurality of first light emitting elements 11 arranged in the vicinity of the outer periphery of the 20 are arranged in an arc shape.

Similarly, in the second mounting region 22 which is adjacent to the first mounting region 21 and has a fan-shaped planar shape having the same central angle as the first mounting region 21 (120 °), the plurality of second light emitting elements 12 and the plurality of. The third light emitting element 13, the plurality of first light emitting elements 11, and the plurality of second light emitting elements 12 are sequentially arranged from the center point toward the outer periphery. In the second mounting area 22, the plurality of second light emitting elements 12 arranged near the central portion of the mounting area 20 are arranged in a fan shape, and the plurality of third light emitting elements 13, the plurality of first light emitting elements 11 and the mounting area are arranged. The plurality of second light emitting elements 12 arranged in the vicinity of the outer periphery of the 20 are arranged in an arc shape.

Similarly, the third mounting having a fan-shaped planar shape adjacent to both the first mounting region 21 and the second mounting region 22 and having the same central angle as the first mounting region 21 and the second mounting region 22 (120 °). In the region 23, a plurality of third light emitting elements 13, a plurality of first light emitting elements 11, a plurality of second light emitting elements 12, and a plurality of third light emitting elements 13 are arranged in this order from the center point toward the outer periphery. In the third mounting area 23, the plurality of third light emitting elements 13 arranged near the central portion of the mounting area 20 are arranged in a fan shape, and the plurality of first light emitting elements 11, the plurality of second light emitting elements 12, and the mounting area are arranged. The plurality of third light emitting elements 13 arranged in the vicinity of the outer periphery of the 20 are arranged in an arc shape.

A first anode electrode 31, a first cathode electrode 32, a second anode electrode 33, a second cathode electrode 34, a third anode electrode 35, and a third cathode electrode 36 are arranged on the surface of the substrate 10. The first anode electrode 31, the first cathode electrode 32, the second anode electrode 33, the second cathode electrode 34, the third anode electrode 35, and the third cathode electrode 36 are formed of a conductive member such as copper.

The first light emitting element 11 is a blue LED formed of a semiconductor material such as gallium nitride (GaN) and emits blue light having a peak wavelength of 450 nm when a voltage equal to or higher than the threshold voltage is applied between the anode and the cathode. It is a die.

The second light emitting device 12 is a green LED die made of a semiconductor material such as indium gallium nitride (InGaN), aluminum indium gallium gallium phosphide (AlGaInP), and zinc telluride (ZnTe). The second light emitting element 12 is a green LED die that emits green light having a peak wavelength of 550 nm when a voltage equal to or higher than the threshold voltage is applied between the anode and the cathode.

The third light emitting device 13 is made of a semiconductor material such as aluminum indium gallium phosphorus (AlInGaP), and emits red light having a peak wavelength of 660 nm when a voltage equal to or higher than the threshold voltage is applied between the anode and the cathode. It is a red LED die.

Although the first light emitting element 11 has a peak wavelength of 450 nm, the second light emitting element 12 has a peak wavelength of 550 nm, and the third light emitting element 13 has a peak wavelength of 660 nm, the light emitting device according to the embodiment. The light emitting element of the device may be provided with three types of LEDs that emit light in the first, second, and third colors, and is not limited thereto.

The dam material 14 is formed of a synthetic resin such as an opaque silicone resin mixed with white particles, and is arranged so as to surround the mounting region 20. Further, the dam material 14 is located between the first mounting area 21 and the second mounting area 22, between the second mounting area 22 and the third mounting area 23, and with the first mounting area 21 from the periphery of the mounting area 20. It is arranged so as to extend toward the center point O between the third mounting area 23 and the third mounting area 23.

The dam material 14 may be formed by using a material having high thixotropy property. A material having thixotropy increases its fluidity by applying stress, and decreases its fluidity by stopping the application of stress.

First, the material of the dam material 14 in a state of high fluidity under stress is applied by a dispenser around the mounting region 20 and between the first to third mounting regions 21 to 23. Next, the dam material 14 is obtained by stopping applying stress to the material of the dam material 14 by coating to reduce the fluidity and then curing the material of the dam material 14 by heating or the like. Further, the dam material 14 may be formed by using a material having a high viscosity instead of a material having a high thixotropy property.

The sealing material 15 is a transparent synthetic resin such as a resin, and is arranged inside the dam material 14, and is composed of a plurality of first light emitting elements 11, a plurality of second light emitting elements 12, and a plurality of third light emitting elements 13. Seal each.

The first Zener diode 16 is connected between the first anode electrode 31 and the first cathode electrode 32. The first Zener diode 16 causes an overvoltage to flow through the plurality of first light emitting elements 11 by passing a Zener current when a voltage equal to or higher than the breakdown voltage is applied between the first anode electrode 31 and the first cathode electrode 32. Prevents it from being applied.

The second Zener diode 17 is connected between the second anode electrode 33 and the second cathode electrode 34. The second Zener diode 17 causes a plurality of second light emitting elements 12 to be overvoltage by passing a Zener current when a voltage equal to or higher than the breakdown voltage is applied between the second anode electrode 33 and the second cathode electrode 34. Prevents it from being applied.

The third Zener diode 18 is connected between the third anode electrode 35 and the third cathode electrode 36. The third Zener diode 18 causes a plurality of third light emitting elements 13 to be overvoltage by passing a Zener current when a voltage equal to or higher than the breakdown voltage is applied between the third anode electrode 35 and the third cathode electrode 36. Prevents it from being applied.

FIG. 4 is a light emitting device drawn by extracting the first light emitting element 11 from FIG. 2A in order to show the connection relationship between the first light emitting element 11 and the first anode electrode 31 and the first cathode electrode 32. It is a plan view of 1.

The first anode electrode 31 is first bent so as to be arranged between the first mounting region 21 and the third mounting region 23 and between the second mounting region 22 and the third mounting region 23 via the annular electrode 311. It is connected to the electrode 312. The annular electrode 311 is arranged on the outer periphery of the mounting region 20 and is covered with the dam material 14. The first bending electrode 312 has a first straight line portion 313 extending between the first mounting region 21 and the third mounting region 23 from the annular electrode 311 toward the central portion of the mounting region 20, and the central portion of the mounting region 20. It has a second straight portion 314 extending between the second mounting region 22 and the third mounting region 23.

The first straight line portion 313 is connected to the anodes of the two first light emitting elements 11 arranged in the first mounting region 21 by wire bonding, and the first light emitting element 11 arranged in the third mounting region 23. Is connected to the anode by wire bonding. The second straight line portion 314 is connected to the anode of one first light emitting element 11 arranged in the second mounting region 22 by wire bonding.

The first cathode electrode 32 is arranged between the first mounting region 21 and the second mounting region 22 and between the second mounting region 22 and the third mounting region 23 via the annular electrode 321. It is connected to the electrode 322. The annular electrode 321 is arranged on the outer periphery of the mounting region 20 and is covered with the dam material 14. The second bending electrode 322 includes a first straight line portion 323 extending between the first mounting region 21 and the second mounting region 22 from the annular electrode 321 toward the central portion of the mounting region 20, and the central portion of the mounting region 20. It has a second straight portion 324 extending between the second mounting region 22 and the third mounting region 23.

The first straight line portion 323 is connected to the cathodes of the two first light emitting elements 11 arranged in the first mounting region 21 by wire bonding, and the first light emitting element 11 arranged in the second mounting region 22. It is connected to the cathode of the wire by wire bonding. The second straight line portion 324 is connected to the cathode of one first light emitting element 11 arranged in the third mounting region 23 by wire bonding.

As described above, the first anode electrode 31 is connected to each of the four first light emitting elements 11 via the first straight line portion 313 and the second straight line portion 314 of the first bending electrode 312 and wire bonding. Similarly, the first cathode electrode 32 is connected to each of the four first light emitting elements 11 via the first straight line portion 323 and the second straight line portion 324 of the second bending electrode 322 and wire bonding. A plurality of first light emitting elements 11 are connected in series between each of the first bending electrode 312 and the second bending electrode 322 and the wire-bonded first light emitting element 11. In the light emitting device 1, nine first light emitting elements 11 are connected in series between the first bending electrode 312 and the second bending electrode 322. When a voltage 9 times the threshold voltage of the first light emitting element 11 is applied between the first anode electrode 31 and the first cathode electrode 32, the first light emitting element 11 emits blue light.

The end of the annular electrode 311 on the first mounting region 21 side and the end of the annular electrode 321 on the first mounting region 21 side are connected via the first Zener diode 16.

FIG. 5 is a light emitting device drawn by extracting the second light emitting element 12 from FIG. 2A in order to show the connection relationship between the second light emitting element 12, the second anode electrode 33, and the second cathode electrode 34. It is a plan view of 1.

The second anode electrode 33 is arranged between the first mounting region 21 and the third mounting region 23 and between the second mounting region 22 and the third mounting region 23 via the first annular electrode 331. 3 It is connected to the bending electrode 332. The first annular electrode 331 is arranged on the outer periphery of the mounting region 20 and is covered with the dam material 14. The third bending electrode 332 has a first straight line portion 333 and a second straight line portion 334. The first straight line portion 333 extends between the first mounting region 21 and the third mounting region 23 from the first annular electrode 331 toward the central portion of the mounting region 20. The second straight line portion 334 extends from the central portion of the mounting region 20 between the second mounting region 22 and the third mounting region 23. The third bending electrode 332 is connected to the second annular electrode 335 at the outer peripheral end of the mounting region 20. The second annular electrode 335 is arranged on the outer periphery of the mounting region 20 and is covered with the dam material 14.

The first straight line portion 333 is connected to the anode of one second light emitting element 12 arranged in the first mounting region 21 by wire bonding, and one second light emitting element 12 arranged in the third mounting region 23. Is connected to the anode by wire bonding. The second straight line portion 334 is connected to the anodes of the two second light emitting elements 12 arranged in the second mounting region 22 by wire bonding.

The second cathode electrode 34 is a fourth bend arranged between the first mounting region 21 and the second mounting region 22 and between the second mounting region 22 and the third mounting region 23 via the annular electrode 341. It is connected to the electrode 342. The annular electrode 341 is arranged on the outer periphery of the mounting region 20 and is covered with the dam material 14. The fourth bending electrode 342 includes a first straight line portion 343 extending between the first mounting region 21 and the second mounting region 22 from the annular electrode 341 toward the central portion of the mounting region 20, and the central portion of the mounting region 20. It has a second straight portion 344 extending between the second mounting region 22 and the third mounting region 23.

The first straight line portion 343 is connected to the cathode of one second light emitting element 12 arranged in the first mounting region 21 by wire bonding, and the two second light emitting elements 12 arranged in the second mounting region 22. It is connected to the cathode of the wire by wire bonding. The second straight line portion 344 is connected to the cathode of one second light emitting element 12 arranged in the third mounting region 23 by wire bonding.

As described above, the second anode electrode 33 is connected to each of the four second light emitting elements 12 by the first straight line portion 333 and the second straight line portion 334 of the third bending electrode 332 and the wire bonding. Similarly, the second cathode electrode 34 is connected to each of the four second light emitting elements 12 by the first straight line portion 343 and the second straight line portion 344 of the fourth bending electrode 342 and wire bonding. A plurality of second light emitting elements 12 are connected in series between each of the third bending electrode 332 and the fourth bending electrode 342 and the wire-bonded second light emitting element 12. In the light emitting device 1, nine second light emitting elements 12 are connected in series between the third bending electrode 332 and the fourth bending electrode 342. When a voltage 9 times the threshold voltage of the second light emitting element 12 is applied between the second anode electrode 33 and the second cathode electrode 34, the second light emitting element 12 emits green light.

The end of the second annular electrode 335 on the second mounting region 22 side and the end of the annular electrode 341 on the second mounting region 22 side are connected via the second Zener diode 17.

FIG. 6 is a light emitting device drawn by extracting the third light emitting element 13 from FIG. 2A in order to show the connection relationship between the third light emitting element 13 and the third anode electrode 35 and the third cathode electrode 36. It is a plan view of 1.

The third anode electrode 35 is a fifth bend arranged between the first mounting region 21 and the third mounting region 23 and between the second mounting region 22 and the third mounting region 23 via the annular electrode 351. It is connected to the electrode 352. The annular electrode 351 is arranged on the outer periphery of the mounting region 20 and is covered with the dam material 14. The fifth bending electrode 352 includes a first straight line portion 353 extending between the first mounting region 21 and the third mounting region 23 from the annular electrode 351 toward the central portion of the mounting region 20, and the central portion of the mounting region 20. It has a second straight portion 354 extending between the second mounting region 22 and the third mounting region 23.

The first straight line portion 353 is connected to the anode of one third light emitting element 13 arranged in the first mounting region 21 by wire bonding, and the two third light emitting elements 13 arranged in the third mounting region 23. Is connected to the anode by wire bonding. The second straight line portion 354 is connected to the anode of one third light emitting element 13 arranged in the second mounting region 22 by wire bonding.

The third cathode electrode 36 includes a first linear electrode 362 arranged between the first mounting region 21 and the second mounting region 22 via the annular electrode 361, and the second mounting region 22 and the third mounting region 23. It is connected to the second linear electrode 363 arranged between the two. The annular electrode 361 is arranged on the outer periphery of the mounting region 20 and is covered with the dam material 14.

The first linear electrode 362 is connected to the cathode of one third light emitting element 13 arranged in the first mounting region 21 by wire bonding, and one third light emitting element 13 arranged in the second mounting region 22. It is connected to the cathode of the wire by wire bonding. The second linear electrode 363 is connected to the cathodes of the two third light emitting elements 13 arranged in the third mounting region 23 by wire bonding.

As described above, the third anode electrode 35 is connected to each of the four third light emitting elements 13 via the first straight line portion 353 and the second straight line portion 354 of the fifth bending electrode 352 and wire bonding. Similarly, the third cathode electrode 36 is connected to each of the four third light emitting elements 13 via the first linear electrode 362, the second linear electrode 363, and wire bonding. A plurality of third light emitting elements are formed between the third light emitting element 13 wire-bonded to the third bending electrode 352 and the third light emitting element 13 wire-bonded to each of the first linear electrode 362 and the second linear electrode 363. The elements 13 are connected in series. That is, in the light emitting device 1, nine third light emitting elements 13 are connected in series between the third bending electrode 352 and the first straight electrode 362 and the second straight electrode 363. When a voltage 9 times the threshold voltage of the third light emitting element 13 is applied between the third anode electrode 35 and the third cathode electrode 36, the third light emitting element 13 emits red light.

The end of the annular electrode 351 on the third mounting region 23 side and the end of the annular electrode 361 on the third mounting region 23 side are connected via a third Zener diode 18.

(Manufacturing method of light emitting device according to embodiment)
First, in the first step, the mounting substrate 10a and the circuit board 10b are adhered to form the substrate 10. Next, in the second step, the plurality of first light emitting elements 11, the plurality of second light emitting elements 12, and the plurality of third light emitting elements 13 are mounted (die bonded) in the mounting region 20 of the substrate 10. Next, in the third step, the plurality of first light emitting elements 11, the plurality of second light emitting elements 12, and the plurality of third light emitting elements 13 are wire-bonded. The plurality of first light emitting elements 11 are electrically connected to the first anode electrode 31 and the first cathode electrode 32 by wire bonding. Similarly, the plurality of second light emitting elements 12 are electrically connected to the second anode electrode 33 and the second cathode electrode 34 by wire bonding. The plurality of third light emitting elements 13 are electrically connected to the third anode electrode 35 and the third cathode electrode 36 by wire bonding.

Next, in the fourth step, the dam material 14 is arranged along the outer circumference of the mounting area 20, and the dam material 14 is arranged between the first to third mounting areas 21 to 23. Then, in the fifth step, the sealing material 15 is arranged inside the dam material 14 so as to seal the plurality of first light emitting elements 11, the plurality of second light emitting elements 12, and the plurality of third light emitting elements 13. , The light emitting device 1 is obtained.

(Action and effect of the light emitting device according to the first embodiment)
In the light emitting device 1, a plurality of first light emitting elements 11, a plurality of second light emitting elements 12, and a plurality of third light emitting elements 13 are provided in all of the first mounting region 21, the second mounting region 22, and the third mounting region 23. Since it is arranged in a symmetrical arrangement shape (it is replaced for each mounting area), it is possible to emit light with high color mixing.

Specifically, in the first mounting region 21, a plurality of first light emitting elements 11, a plurality of second light emitting elements 12, a plurality of third light emitting elements 13 and a plurality of first light emitting elements 11 are sequentially arranged from the center point to the outer periphery. Placed towards. Similarly, in the second mounting region 22, the plurality of second light emitting elements 12, the plurality of third light emitting elements 13, the plurality of first light emitting elements 11 and the plurality of second light emitting elements 12 are sequentially arranged from the center point toward the outer periphery. Be placed. In the third mounting region 23, a plurality of third light emitting elements 13, a plurality of first light emitting elements 11, a plurality of second light emitting elements 12, and a plurality of third light emitting elements 13 are sequentially arranged from the center point toward the outer periphery. .. The light emitting device 1 has symmetry (1/3 rotational symmetry) in the first mounting area 21, the second mounting area 22, and the third mounting area 23 when the light emitting color is ignored, and the light emitting color is taken into consideration. The arrangement positions of the first light emitting element 11, the second light emitting element 12, and the third light emitting element 13 are different from each other in the respective mounting regions (first to third mounting regions 21 to 23) (they are replaced for each mounting region). By arranging the first to third light emitting elements 11 to 13 in this way, the light emitting device 1 can emit light having high color mixing.

Further, the light emitting device 1 includes bending electrodes 312, 322, 332, 342, 352 and linear electrodes connected to the first to third anode electrodes 31, 33, 35 and the first to third cathode electrodes 32, 24, 36. 362 and 363 are arranged between the mounting areas. By doing so, the first to third light emitting elements 11 to 13 mounted in each mounting region (first to third mounting regions 21 to 23) correspond to the first to third anode electrodes 31 respectively. , 33, 35 and the first to third cathode electrodes 32, 24, 36.

(Configuration and function of light emitting device according to the second embodiment)
FIG. 7A is a plan view of the light emitting device 2 according to the second embodiment, and FIG. 7B is a cross-sectional view taken along the line AA'shown in FIG. 7A.

The light emitting device 2 is different from the light emitting device 1 in that a plurality of first light emitting elements 41 are arranged in place of the plurality of first light emitting elements 11. Further, the light emitting device 2 is different from the light emitting device 1 in that a plurality of second light emitting elements 42 are arranged in place of the plurality of second light emitting elements 12. Further, the light emitting device 2 is different from the light emitting device 1 in that a plurality of third light emitting elements 43 are arranged in place of the plurality of third light emitting elements 13. The components and functions of the light emitting device 2 other than the plurality of first light emitting elements 41, the plurality of second light emitting elements 42, and the plurality of third light emitting elements 43 are the components of the light emitting device 1 having the same reference numerals. Since it is the same as the configuration and function, detailed description thereof will be omitted here. In FIG. 7, the plurality of first light emitting elements 41 are indicated by “B”, the plurality of second light emitting elements 42 are indicated by “R”, and the plurality of third light emitting elements 43 are indicated by “F”.

The first light emitting element 41 is a blue LED formed of a semiconductor material such as gallium nitride (GaN) and emits blue light having a peak wavelength of 450 nm when a voltage equal to or higher than the threshold voltage is applied between the anode and the cathode. It is a die.

The second light emitting element 42 is made of a semiconductor material such as aluminum indium gallium phosphorus (AlInGaP), and has a peak wavelength of 660 nm when a voltage equal to or higher than the threshold voltage is applied between the anode and the cathode. It is a red LED die that emits light.

The third light emitting device 43 is made of a semiconductor material such as aluminum infrared gallium phosphorus (AlInGaP), and has a wavelength of a peak wavelength of 730 nm when a voltage equal to or higher than the threshold voltage is applied between the anode and the cathode. A near-infrared LED die that emits external light.

(Action and effect of the light emitting device according to the second embodiment)
The light emitting device 2 includes light emitted by the first light emitting element 41 having a peak wavelength of 450 nm, light emitted by the second light emitting element 42 having a peak wavelength of 660 nm, and light emitted by the third light emitting element 43 having a peak wavelength of 730 nm. Can emit mixed light.

FIG. 8 is a diagram showing an example of the wavelength distribution of the light emitted from the light emitting device 2. In FIG. 8, the horizontal axis represents the wavelength and the vertical axis represents the luminous flux. More precisely, the vertical axis is the luminous flux per single wavelength (the product of the spectral radiant flux and the luminosity factor), and the luminous flux near the peak wavelength of the light emitted by the first light emitting element 41 is standardized as 100%. That is, FIG. 8 shows the luminous flux of each wavelength of the light emitted from the light emitting device 2.

The light emitting device 2 can emit light having peaks at 450 nm indicated by arrow A, 660 nm indicated by arrow B, and 730 nm indicated by arrow C in FIG. Here, the luminous flux of the light having a wavelength of 555 nm indicated by the arrow D in FIG. 8 is 35% of the luminous flux of the light having a wavelength of 450 nm. Further, the luminous flux of the light having a wavelength of 700 nm indicated by the arrow E in FIG. 8 is 40% of the luminous flux of the light having a wavelength of 450 nm.

The light emitting device 2 can be suitably used as, for example, a light source for plant growing lighting by emitting light having the wavelength characteristics shown in FIG.

(Configuration and function of light emitting device according to the third embodiment)
9 (a) is a plan view of the light emitting device according to the third embodiment, and FIG. 9 (b) is a cross-sectional view taken along the line AA'shown in FIG. 9 (a).

The light emitting device 3 is different from the light emitting device 1 in that a plurality of first light emitting elements 51 are arranged in place of the plurality of first light emitting elements 11. Further, the light emitting device 3 is different from the light emitting device 1 in that a plurality of second light emitting elements 52 are arranged in place of the plurality of second light emitting elements 12. Further, the light emitting device 3 is different from the light emitting device 1 in that a plurality of third light emitting elements 53 are arranged in place of the plurality of third light emitting elements 13. The components and functions of the light emitting device 3 other than the plurality of first light emitting elements 51, the plurality of second light emitting elements 52, and the plurality of third light emitting elements 53 are the components of the light emitting device 1 having the same reference numerals. Since it is the same as the configuration and function, detailed description thereof will be omitted here. In FIG. 9, the plurality of first light emitting elements 51 are indicated by "B", the plurality of second light emitting elements 52 are indicated by a thick hatch downward to the right, and the plurality of third light emitting elements 53 are indicated by a downward downward left. Indicated by a fine hatch.

The first light emitting element 51 is a blue LED die that is formed of a semiconductor material such as gallium nitride (GaN) and emits blue light having a peak wavelength of 450 nm when a voltage equal to or higher than the threshold voltage is applied between the anode and the cathode. Has 50.

The second light emitting element 52 has a blue LED die 50 and a green phosphor 520 arranged on the surface and side surfaces of the blue LED die 50. Since the blue LED die 50 included in the second light emitting element 52 is the same as the blue LED die 50 included in the first light emitting element 51, detailed description thereof will be omitted here. The green phosphor 520 included in the second light emitting element 52 is, for example, β-SiALON (Si _6-z Al _z O _z N _8-z : Eu) or the like, and the blue light incident from the blue LED die 50 is converted into green light. Convert.

The third light emitting element 53 has a blue LED die 50 and a red phosphor 530 arranged on the surface and side surfaces of the blue LED die 50. Since the blue LED die 50 included in the third light emitting element 53 is the same as the blue LED die 50 included in the first light emitting element 51, detailed description thereof will be omitted here. The red phosphor 530 included in the third light emitting element 53 is, for example, a CASN phosphor (CaAlSiN ₃ ) or the like, and converts blue light incident from the blue LED die 50 into red light.

(Manufacturing method of light emitting device according to embodiment)
First, in the first step, the mounting substrate 10a and the circuit board 10b are adhered to form the substrate 10. Next, in the second step, the blue LED die 50 included in the plurality of first light emitting elements 51, the plurality of second light emitting elements 52, and the plurality of third light emitting elements 53 is mounted in the mounting region 20 of the substrate 10 (die). bonding). Next, in the third step, the blue LED dies 50 included in the plurality of first light emitting elements 51, the plurality of second light emitting elements 52, and the plurality of third light emitting elements 53 are wire-bonded.

Next, in the fourth step, the plurality of second light emitting elements 52 are formed by arranging the green phosphor 520 on the surface and side surfaces of the blue LED die 50 corresponding to the plurality of second light emitting elements 52. The green phosphor 520 that covers the surface and side surfaces of the blue LED die 50 is mixed with the green phosphor 520 in a state where, for example, the area other than the area where the blue LED die 50 corresponding to the plurality of second light emitting elements 52 is arranged is shielded by a mask. The liquid is arranged by injecting the liquid onto the surface of the substrate 10. Further, the upper surface of the blue LED die 50 and its vicinity may be spot-printed with the green phosphor 520.

The fourth step of arranging the green phosphor 520 on the blue LED 50 will be described in more detail with reference to the drawings. 10 to 12 are views showing a fourth step of forming the second light emitting element 52. 10 (a) and 11 (a) are plan views of the mask 100 and the light emitting device 3 in the middle of the process, and FIG. 12 (a) is a plan view of the light emitting device 3 in the middle of the process. 10 (b) and 11 (b) are cross-sectional views taken along the line AA'of the manufacturing apparatus and the light emitting apparatus 3 shown in FIGS. 10 (a) and 11 (a), FIG. 12 (b). Is a cross-sectional view taken along the line AA'of the light emitting device 3 shown in FIG. 12 (a). The manufacturing apparatus in this step includes a mask 100 and a spraying apparatus 110.

As shown in FIG. 10B, first, in the mask 100 (see FIG. 10A) in which the injection hole 101 is formed, the injection hole 101 is above the blue LED die 50 corresponding to the second light emitting element 52. Arranged to be located. The injection hole 101 is, for example, a circular through hole whose diameter matches the diagonal length of the blue LED die 50 corresponding to the second light emitting element 52. 36 injection holes 101 are formed, which is the same number as the number of blue LED dies 50 corresponding to the second light emitting element 52, corresponding to each of the blue LED dies 50 corresponding to the second light emitting element 52.

Next, as shown in FIG. 11B, from above the mask 100, a liquid 111 in which the green phosphor 520 is mixed (fluorescent particles are dispersed in a solvent (dispersion medium) and silicone is dissolved). Is sprayed from the spray device 110. The spraying device 110 preferably sprays the liquid 111 from a height of 40 mm above the mask 100. Next, when the substrate 10 is heated and the liquid 111 (solvent) is vaporized, the green phosphor 520 contained in the liquid 111 adheres to the surface and side surfaces of the blue LED die 50 corresponding to the second light emitting element 52. The spraying step of spraying the liquid 111 and the fixing step of fixing the green phosphor 520 to the surface and side surfaces of the blue LED die 50 corresponding to the second light emitting element 52 are repeated a plurality of times. The number of times the spraying step and the fixing step are repeated is, for example, 70 times. Note that FIG. 11A shows a state in which the green phosphor 520 on the light emitting device 3 is observed from the spray hole 101 of the mask 100.

Then, as shown in FIG. 12B, the mask 100 is removed from above the substrate 10. Through the above steps, the surface and side surfaces of the blue LED die 50 corresponding to the second light emitting element 52 are covered with the green phosphor 520.

Next, in the fifth step, the plurality of third light emitting elements 53 are formed by arranging the red phosphor 530 on the front surface and the back surface of the blue LED die 50 corresponding to the plurality of third light emitting elements 53. The red phosphor 530 that covers the surface and side surfaces of the blue LED die 50 is mixed with the red phosphor 530 in a state where, for example, the area other than the area where the blue LED die 50 corresponding to the plurality of third light emitting elements 53 is arranged is shielded by a mask. The liquid is arranged by injecting the liquid onto the surface of the substrate 10.

The fifth step of arranging the red phosphor 530 on the blue LED 50 will be described in more detail with reference to the drawings. 13 to 15 are views showing a fifth step of forming the third light emitting element 53. 13 (a) and 14 (a) are plan views of the mask 200 and the light emitting element 3 in the middle of the process, and FIG. 15 (a) is a plan view of the light emitting element 3 in the middle of the process. 13 (b) and 14 (b) are cross-sectional views taken along the line AA'of the manufacturing apparatus and the light emitting device 3 shown in FIGS. 13 (a) and 14 (a), FIG. 15 (b). Is a cross-sectional view taken along the line AA'of the light emitting element 3 shown in FIG. 15 (a). The manufacturing apparatus in this step includes a mask 200 and a spraying apparatus 210.

As shown in FIG. 13B, first, the mask 200 (see FIG. 13A) on which the injection hole 201 is formed is a blue LED die corresponding to the third light emitting element 53 (see FIG. 15B). The injection hole 201 is arranged so as to be located above the 50. The injection hole 201 is, for example, a circular through hole whose diameter matches the diagonal length of the blue LED die 50 corresponding to the third light emitting element 53. 36 injection holes 201 are formed, which is the same number as the number of blue LED dies 50 corresponding to the third light emitting element 53, corresponding to each of the blue LED dies 50 corresponding to the third light emitting element 53.

Next, as shown in FIG. 14B, from above the mask 200, the liquid 211 in which the red phosphor 530 is mixed (the fluorescent particles are dispersed in the solvent (dispersion medium) and the silicone is dissolved). Is sprayed from the spraying device 210. The spraying device 210 preferably sprays the liquid 211 from a height of 40 mm above the mask 200. Next, when the substrate 10 is heated and the liquid 211 (solvent) is vaporized, the red phosphor 530 contained in the liquid 211 adheres to the surface and side surfaces of the blue LED die 50 corresponding to the third light emitting element 53. The spraying step of spraying the liquid 211 and the fixing step of fixing the red phosphor 530 to the surface and side surfaces of the blue LED die 50 corresponding to the third light emitting element 53 are repeated a plurality of times. The number of times the spraying step and the fixing step are repeated is, for example, 70 times. Note that FIG. 14A shows a state in which the red phosphor 530 on the light emitting device 3 is observed from the spray hole 201 of the mask 200.

Then, as shown in FIG. 15B, the mask 200 is removed from above the substrate 10. Through the above steps, the surface and side surfaces of the blue LED die 50 corresponding to the third light emitting element 53 are covered with the red phosphor 530.

Next, in the sixth step, the dam material 14 is arranged between the outer circumference of the mounting area 20 and the first to third mounting areas 21 to 23. Then, in the seventh step, the sealing material 15 is arranged inside the dam material 14 so as to seal the plurality of first light emitting elements 11, the plurality of second light emitting elements 12, and the plurality of third light emitting elements 13. , The light emitting device 1 is obtained.

(Modified example of the light emitting device according to the embodiment)
The light emitting devices 1 to 3 are equipped with a light emitting element that emits red light, green light, and blue light, or a light emitting element that emits near infrared light, red light, and blue light. However, the light emitting device according to the embodiment may be equipped with a light emitting element that emits light of any three colors. Any three colors may include any of cyan, magenta, yellow and white.

Further, the light emitting device 2 is equipped with a light emitting element that emits near infrared light, red light, and blue light. However, the light emitting device according to the embodiment includes a blue LED die, a light emitting element in which a red phosphor is arranged on the surface and side surfaces of the blue LED die, and light emission in which near infrared phosphors are arranged on the surface and side surfaces of the blue LED die. The element may be mounted.

Further, in the light emitting devices 1 to 3, the first, second, and third light emitting elements are stacked in layers from the center to the outer periphery in the first, second, and third mounting regions 23, respectively, and when the emission color is ignored, they are respectively. The light emitting element of was point-symmetrical (1/3 rotational symmetry). However, the light emitting element in the light emitting device according to the embodiment is not limited to the arrangement shape of the light emitting elements shown in the light emitting devices 1 to 3.

Therefore, with reference to FIG. 16, a light emitting device having a different arrangement shape of the light emitting elements from the light emitting elements 1 to 3 will be described. FIG. 16 is a diagram showing an arrangement shape of light emitting elements according to a modified example. In FIG. 16, (a) is a first modified example, (b) is a second modified example, (c) is a third modified example, (d) is a fourth modified example, and (e) is a fifth modified example. .. Further, in FIG. 16, a group of light emitting elements including a light emitting element that emits blue light is indicated by “B”, and a group of light emitting elements including a light emitting element that emits green light is indicated by “G”, and emits red light. The light emitting element group including the light emitting element is indicated by "R", and the light emitting element group including the light emitting element that emits white light is indicated by "W".

As shown in FIG. 16A, in the arrangement shape 61 of the light emitting elements according to the first modification, the group of light emitting elements emitting blue light, green light, and red light may be arranged in three rows instead of four rows. It is different from the arrangement shape of the light emitting element in the light emitting device 1. That is, when applied to FIG. 1, in the light emitting device having the arrangement shape 61 according to the first modification, the LED row in which the first light emitting element 11 is connected in series and the second light emitting element 12 are connected in series in the first mounting region 21. The connected LED rows and the LED rows in which the third light emitting element 13 is connected in series are arranged in order from the center to the outer periphery.

Similarly, as shown in FIG. 16B, in the arrangement shape 62 of the light emitting elements according to the second modification, the light emitting element groups that emit blue light, green light, and red light are arranged in order from the center toward the outer periphery. It is different from the arrangement shape of the light emitting elements in the light emitting device 1 that they are arranged in order (in a fan shape) along the radial direction instead of being arranged.

Similarly, as shown in FIG. 16C, the arrangement shape 63 of the light emitting element according to the third modification has the same planar shape as the first mounting region, the second mounting region, and the third mounting region. Having a further mounting region is different from the arrangement shape of the light emitting elements in the light emitting device 1. Further, the arrangement shape 63 of the light emitting elements according to the third modification has a fourth light emitting element group that emits white light in addition to the light emitting element group that emits blue light, green light, and red light. It is different from the arrangement shape of the element.

In the arrangement shape 63, the arrangement shapes of the light emitting element groups that emit blue light, green light, red light, and white light arranged in the first mounting area, the second mounting area, the third mounting area, and the fourth mounting area are mutual. Is arranged on the substrate 10 so as to have symmetry. In the arrangement shape 63, the light emitting element groups that emit blue light, green light, red light, and white light arranged in the first mounting area, the second mounting area, the third mounting area, and the fourth mounting area ignore the emission color. When this is done, they are arranged on the substrate so as to be point-symmetrical (1/4 rotationally symmetric) with respect to the center point O of the first mounting area, the second mounting area, the third mounting area, and the fourth mounting area. ..

Similarly, as shown in FIG. 16D, in the arrangement shape 64 of the light emitting elements according to the fourth modification, the arrangement shape of the light emitting element group that emits blue light, green light, red light, and white light is the first. It is arranged on the substrate so as to be axisymmetric when the emission color is ignored with respect to the axis of symmetry C extending between the mounting region and the fourth mounting region.

Similarly, as shown in FIG. 16E, in the arrangement shape 65 of the light emitting elements according to the fifth modification, the arrangement shape of the light emitting element group that emits blue light, green light, red light, and white light is the first. It is arranged on the substrate so as to be axisymmetric when the emission color is ignored with respect to the axis of symmetry D extending between the mounting region and the fourth mounting region.

1-3 Light emitting device 10 Substrate 11, 41, 51 First light emitting element 12, 42, 52 Second light emitting element 13, 43, 53 Third light emitting element 14 Dam material 15 Encapsulant 20 Mounting area 21 First mounting area 22 2nd mounting area 23 3rd mounting area

Claims (8)

The first mounting area, the second mounting area adjacent to the first mounting area and having the same planar shape as the first mounting area, and adjacent to both the first mounting area and the second mounting area and said to be said. A substrate having a first mounting area and a third mounting area having the same planar shape as the second mounting area,
A plurality of first light emitting elements arranged in the first mounting area, the second mounting area, and the third mounting area, respectively, and emitting light in the first color.
A plurality of second light emitting elements arranged in the first mounting area, the second mounting area, and the third mounting area, respectively, and emitting light in a second color different from the first color.
A plurality of third light emitting elements arranged in the first mounting region, the second mounting region, and the third mounting region, respectively, and emitting light in a third color different from both the first color and the second color. ,
It has the plurality of first light emitting elements, the plurality of second light emitting elements, and a sealing material for sealing the plurality of third light emitting elements.
The arrangement shape of the plurality of first light emitting elements arranged in the first mounting area, the second mounting area, and the third mounting area, the first mounting area, the second mounting area, and the third mounting area. The arrangement shape of the plurality of second light emitting elements arranged in each of the above, and the arrangement shape of the plurality of third light emitting elements arranged in the first mounting region, the second mounting region, and the third mounting region, respectively. Are arranged on the substrate so as to be symmetrical with each other.
A light emitting device characterized in that. The arrangement shape of the plurality of first light emitting elements arranged in the first mounting area, the second mounting area, and the third mounting area, the first mounting area, the second mounting area, and the third mounting area. The arrangement shape of the plurality of second light emitting elements arranged in each of the above, and the arrangement shape of the plurality of third light emitting elements arranged in the first mounting region, the second mounting region, and the third mounting region, respectively. The light emitting device according to claim 1, wherein the light emitting device is arranged on the substrate so as to be point-symmetric with respect to the center points of the first mounting region, the second mounting region, and the third mounting region. Each of the first mounting area, the second mounting area, and the third mounting area has a fan-shaped planar shape.
In the first mounting region, the plurality of first light emitting elements, the plurality of second light emitting elements, and the plurality of third light emitting elements are sequentially arranged from the center point toward the outer periphery.
In the second mounting region, the plurality of second light emitting elements, the plurality of third light emitting elements, and the plurality of first light emitting elements are sequentially arranged from the center point toward the outer periphery.
The second aspect of the present invention, wherein in the third mounting region, the plurality of third light emitting elements, the plurality of first light emitting elements, and the plurality of second light emitting elements are sequentially arranged from the center point toward the outer periphery. Light emitting device. In the first mounting region, the plurality of first light emitting elements are further arranged on the outer peripheral side of the plurality of third light emitting elements.
In the second mounting region, the plurality of second light emitting elements are further arranged on the outer peripheral side of the plurality of first light emitting elements.
The light emitting device according to claim 3, wherein in the third mounting region, the plurality of third light emitting elements are further arranged on the outer peripheral side of the plurality of second light emitting elements. Each of the plurality of first light emitting elements emits blue light.
Each of the plurality of second light emitting elements emits red light.
The light emitting device according to any one of claims 1 to 4, wherein each of the plurality of third light emitting elements emits near infrared light. Further having a plurality of fourth light emitting elements that emit light of a fourth color different from any of the first color, the second color, and the third color.
The substrate further has a first mounting region, a second mounting region, and a fourth mounting region having the same planar shape as the third mounting region.
The arrangement shape of the plurality of first light emitting elements arranged in the first mounting area, the second mounting area, the third mounting area, and the fourth mounting area, the first mounting area, and the second mounting area. , The arrangement shape of the plurality of second light emitting elements arranged in the third mounting area and the fourth mounting area, respectively, and the first mounting area, the second mounting area, the third mounting area, and the fourth. The arrangement shape of the plurality of third light emitting elements arranged in the mounting area, and the plurality of elements arranged in the first mounting area, the second mounting area, the third mounting area, and the fourth mounting area, respectively. The light emitting device according to claim 1, wherein the arrangement shape of the fourth light emitting element is arranged on the substrate so as to have mutual symmetry. The arrangement shape of the plurality of first light emitting elements arranged in the first mounting area, the second mounting area, the third mounting area, and the fourth mounting area, the first mounting area, and the second mounting area. , The arrangement shape of the plurality of second light emitting elements arranged in the third mounting area and the fourth mounting area, respectively, the first mounting area, the second mounting area, the third mounting area, and the fourth mounting. The arrangement shape of the plurality of third light emitting elements arranged in each region, and the plurality of first mounting regions, the second mounting region, the third mounting region, and the fourth mounting region, respectively. The arrangement shape of the four light emitting elements is arranged on the substrate so as to be point-symmetric with respect to the center points of the first mounting region, the second mounting region, the third mounting region, and the fourth mounting region. The light emitting device according to claim 6. The arrangement shape of the plurality of first light emitting elements arranged in the first mounting area, the second mounting area, the third mounting area, and the fourth mounting area, the first mounting area, and the second mounting area. , The arrangement shape of the plurality of second light emitting elements arranged in the third mounting area and the fourth mounting area, respectively, the first mounting area, the second mounting area, the third mounting area, and the fourth mounting. The arrangement shape of the plurality of third light emitting elements arranged in each region, and the plurality of first mounting regions, the second mounting region, the third mounting region, and the fourth mounting region, respectively. The arrangement shape of the four light emitting elements is line-symmetric with respect to the axis of symmetry extending between the first mounting region, the second mounting region, the third mounting region, and the fourth mounting region. The light emitting device according to claim 6, which is arranged above.

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