JP2023031774A - Light-emitting device - Google Patents

Abstract

To provide a light-emitting device which improves color mixture.SOLUTION: A light-emitting device 101 has a substrate, a first light-emitting element which is mounted on the substrate and emits first light having first chromaticity, a second light-emitting element which is mounted on the substrate adjacent to the first light-emitting element and emits second light having second chromaticity different from the first chromaticity, a third light-emitting element which is mounted on the substrate so as to be aligned with the first light-emitting element and the second light-emitting element in a predetermined alignment direction, and emits third light having third chromaticity different from the first chromaticity and the second chromaticity, and a sealing resin for sealing at least a part of the side faces of the first light-emitting element, the second light-emitting element and the third light-emitting element, and emits synthetic light in which the first light, the second light and the third light are mixed, wherein in CIE 1976 UCS chromaticity diagram, an average value of a distance between each coordinate of the first chromaticity, the second chromaticity and the third chromaticity and a coordinate of chromaticity of the synthetic light is less than 0.16.SELECTED DRAWING: Figure 3

Description

The present invention relates to light emitting devices.

BACKGROUND ART A so-called side-view type LED module is known, which is mounted on a circuit board or the like using the lower surface of the substrate extending in the longitudinal direction of the substrate as a mounting surface (see, for example, Patent Document 1). A side-view type LED module disclosed in Patent Document 1 includes three LED dies that emit blue light, red light, and green light.

However, the white light emitted from the light emitting device mounted with three LED dies for emitting blue, red, and green light described in Patent Document 1 is There is a problem that the luminance is low compared to white light emitted from the light emitting device.

In order to solve this problem, it is conceivable to combine three LED dies that emit blue light, red light, and green light with a separate LED die that emits white light. there were. Furthermore, there is also the problem of low color mixing when white light is combined with blue light, red light, and green light.

JP 2012-169326 A

An object of the present invention is to provide a light-emitting device that achieves improved color mixing.

A light-emitting device according to an embodiment of the present disclosure includes a substrate, a first light-emitting element mounted on the substrate and emitting first light having a first chromaticity, mounted on the substrate adjacent to the first light-emitting element, a second light emitting element that emits a second light having a second chromaticity different from the first chromaticity; the first light emitting element and the second light emitting element; a third light emitting element that emits third light having a third chromaticity different from the first chromaticity and the second chromaticity; and a sealing resin for sealing, the light emitting device emitting combined light obtained by mixing the first light, the second light, and the third light, wherein the first chromaticity, the third The average value of the distances between the coordinates of each of the two chromaticities and the third chromaticity and the coordinates of the chromaticity of the combined light is less than 0.16.

In the light emitting device according to the embodiment of the present disclosure, the first light emitting element is arranged between the second light emitting element and the third light emitting element, and in the CIE1976 UCS chromaticity diagram, the coordinates of the first chromaticity and the combined light are It is preferable that the distance between the coordinates of the chromaticity of the second chromaticity and the coordinates of the third chromaticity and the coordinates of the chromaticity of the combined light be longer.

In the light emitting device according to the embodiment of the present disclosure, it is preferable that the width of the first light emitting element in the arrangement direction is wider than the width of the second light emitting element and the third light emitting element in the arrangement direction.

In the light-emitting device according to the embodiment of the present disclosure, the height of the first light-emitting element is preferably higher than the heights of the second light-emitting element and the third light-emitting element.

In the light emitting device according to the embodiment of the present disclosure, in the CIE1976 UCS chromaticity diagram, the first chromaticity is (u′, v′) (0.331, 0.547), (0.433, 0.532 ), (0.438, 0.482) and (0.323, 0.508), and the second chromaticity is (u', v' ) is surrounded by four coordinates which are (0.132,0.550), (0.183,0.539), (0.162,0.505) and (0.110,0.521) is the chromaticity in the region, the third chromaticity is (u', v') is (0.122, 0.434), (0.197, 0.442), (0.210, 0.253 ) and (0.110, 0.331).

In the light-emitting device according to the embodiment of the present disclosure, the first light-emitting element includes an LED die that emits blue light, and a first phosphor layer that includes a first phosphor that converts the wavelength of light emitted from the LED die. The second light emitting element has an LED die and a second phosphor layer containing a second phosphor that converts the wavelength of light emitted from the LED die, and the third light emitting element is the LED It preferably has a die and a third phosphor layer including a third phosphor that converts the wavelength of light emitted from the LED die.

In the light-emitting device according to the embodiment of the present disclosure, the peak wavelength of light emitted from each of the first phosphor, the second phosphor, and the third phosphor is preferably 495 nm or more and 615 nm or less. .

In the light emitting device according to the embodiment of the present disclosure, it is preferable that the second phosphor and the third phosphor are made of the same component.

According to the light emitting device according to the embodiment of the present disclosure, it is possible to achieve improvement in color mixing.

1 is an exploded perspective view of a light-emitting module that constitutes a back light-emitting keyboard using a light-emitting device according to an embodiment; FIG. FIG. 2 is a cross-sectional view of the light-emitting module taken along line AA of FIG. 1; 2 is a front perspective view of the light emitting device shown in FIG. 1; FIG. 2 is a rear perspective view of the light emitting device shown in FIG. 1; FIG. 5 is a diagram in which the top surface and bottom surface of the light emitting device shown in FIG. 4 are reversed; FIG. FIG. 10 is a front perspective view of a light emitting device according to another example of the embodiment; 2 is an equivalent circuit diagram of the light emitting device shown in FIG. 1; FIG. 2 is a front view of the light emitting device shown in FIG. 1; FIG. FIG. 9 is a cross-sectional view of the light emitting device taken along line BB of FIG. 8; FIG. 9 is a cross-sectional view of the light emitting device taken along line CC of FIG. 8; 3(a) to 3(c) are diagrams showing part of the manufacturing process of the light emitting device shown in FIG. 1; FIG. 3(a) and 3(b) are diagrams showing another part of the manufacturing process of the light emitting device shown in FIG. 1. FIG. 3(a) and 3(b) are diagrams showing still another part of the manufacturing process of the light emitting device shown in FIG. 1. FIG. 2 is a front view of the light emitting device shown in FIG. 1 including wiring patterns; FIG. (a) is a diagram showing the height of a first light emitting element of the light emitting device shown in FIG. 1, and (b) is a diagram showing the height of a second light emitting element and a third light emitting element of the light emitting device shown in FIG. is. 2 is a CIE1976 UCS chromaticity diagram of each phosphor used in the light emitting device shown in FIG. 1; FIG. FIG. 11 is a diagram (part 1) showing the distances between the coordinates of the first chromaticity, the second chromaticity, and the third chromaticity and the coordinates of the chromaticity of the combined light; FIG. 11 is a diagram (Part 2) showing the distances between the coordinates of the first chromaticity, the second chromaticity, and the third chromaticity and the coordinates of the chromaticity of the combined light; FIG. 11 is a diagram (part 3) showing the distances between the coordinates of the first, second, and third chromaticities and the coordinates of the chromaticity of the combined light; 4 is a light spectrum distribution diagram of first light, second light, and third light emitted from the first light emitting element, the second light emitting element, and the third light emitting element shown in FIG. 3; FIG. (a) is a diagram showing the chromaticity distribution of the combined light emitted from the light emitting device shown in FIG. 1, and (b) is a diagram showing the chromaticity distribution of the combined light emitted from the light emitting device shown in FIG. be. It is a figure which shows the light-emitting device which concerns on a 1st modification. It is a figure which shows the light-emitting device which concerns on a 2nd modification.

A 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 invention described in the claims and equivalents thereof.

FIG. 1 is an exploded perspective view of a light-emitting module 1000 forming a back light-emitting keyboard using a light-emitting device 101 according to an embodiment. The light emitting module 1000 has a flexible printed circuit (FPC) 200 on which a plurality of light emitting devices 101 are mounted, a light guide sheet 300, a reflector 400, and a mask 500. The FPCs 200 are arranged on the left and right sides of the light guide sheet 300, and ten light emitting devices 101 are mounted on each FPC 200. FIG. A wiring pattern for supplying power to the light emitting device 101 is formed on the FPC 200 .

Light emitted from the light emitting device 101 enters from the side surface of the light guide sheet 300, is diffused by the light guide sheet 300, and is emitted to the mask 500 side as uniform emitted light. The reflective plate 400 reflects light toward the side of the light guide sheet 300 opposite to the mask 500 toward the mask 500 to improve light emission efficiency.

The mask 500 is formed with a plurality of openings 501 corresponding to the positions of the keys of the keyboard. By forming the keys from a translucent material, each key can be illuminated by the light emitted from the light emitting device 101 .

FIG. 2 is a diagram showing a cross-sectional view of the light-emitting module 1000 taken along line AA of FIG. FIG. 3 is a diagram showing an example of a front perspective view of the light emitting device 101. As shown in FIG. The light emitting device 101 is a side emitting light emitting device, and includes a substrate 5, a first light emitting element 1 mounted on the substrate 5 and emitting a first light having a first chromaticity, and A second light emitting element 2 that is adjacently mounted on the substrate 5 and emits a second light having a second chromaticity different from the first chromaticity, and the first light emitting element and the second light emitting element are mounted on the substrate 5 together. a third light emitting element 3 for emitting a third light having a third chromaticity different from the first chromaticity and the second chromaticity; and a sealing resin 6 that seals the The light emitting device 101 emits combined light obtained by mixing the first light, the second light, and the third light. Here, the first light having the first chromaticity is illustratively orange light, the second light having the second chromaticity is illustratively lime light, and the third light having the third chromaticity is illustratively cyan. It is colored light. Synthetic light obtained by mixing the colors of the first light, the second light, and the third light is, for example, white light. FIG. 2 shows a cross-sectional view taken along line AA through the first light-emitting element 1 . The light-emitting device 101 emits the incident light L1 emitted from the first light-emitting element 1 in the lateral direction with respect to the FPC 200, which is the mounting substrate. Similarly, although not shown in FIG. 2 , the light emitting device 101 emits light emitted from the second light emitting element 2 and the third light emitting element 3 . In FIG. 2, the first light emitting element 1 is mounted slightly shifted from the center of the substrate 5 of the light emitting device 101 toward the FPC 200 side. The luminance and color mixing of the emitted light L2 emitted from the light emitting module 1000 can be improved by shifting it slightly toward the FPC 200 side. In addition, the position where the first light emitting element 1 is arranged is appropriately determined depending on the thickness of the light guide sheet 300 and the like. By causing the incident light L1 to enter a position away from the position where the emitted light L2 is emitted, the number of reflections within the light guide sheet 300 increases, and the color mixing of the emitted light L2 is improved.

The first light emitting element 1 includes a first LED die 10 and a first phosphor layer 12 containing a first phosphor that converts the wavelength of light emitted from the first LED die 10 . The second light emitting element 2 includes a second LED die 20 and a second phosphor layer 22 containing a second phosphor that converts the wavelength of light emitted from the second LED die 20 . The third light emitting element 3 includes a third LED die 30 and a third phosphor layer 32 containing a third phosphor that converts the wavelength of light emitted from the third LED die 30 .

The first LED die 10, the second LED die 20, and the third LED die 30 of the first light emitting element 1, the second light emitting element 2, and the third light emitting element 3 have a p-type semiconductor layer, an active layer, and an n-type semiconductor layer. , and is flip-chip connected to the substrate 5 . The first LED die 10, the second LED die 20, and the third LED die 30 have a rectangular planar shape. , 130 [μm]×240 [μm]. The peak wavelength of light emitted from the first LED die 10, the second LED die 20, and the third LED die 30 is about 430 to 460 [nm], and the first LED die 10, the second LED die 20, and the third LED die 30 A blue LED die that emits blue light. In this embodiment, the first LED die 10, the second LED die 20, and the third LED die 30 are flip-chip bonded to the substrate 5, but the first LED die 10, the second LED die 20, and the third LED die 30 are not connected to the substrate. 5 may be wire-bonded.

The first phosphor layer 12 has a sheet-like shape and is arranged on the surface of the first LED die 10 . The first phosphor layer 12 is a resin layer containing the first phosphor, and the surface opposite to the surface in contact with the first light emitting element 1 is exposed from the surface of the sealing resin 6 . The first phosphor is, for example, a (Sr,Ca)AlSiN ₃ :Eu phosphor, also called SCASN. The first light emitting element 1 mixes the blue light emitted from the first LED die 10 and the light generated by exciting the phosphor in the first phosphor layer 12 when the blue light is incident. The generated orange light is emitted as the first light. Although the first light emitting element 1 may emit magenta light, the human eye can detect brightness with high sensitivity by emitting orange light having a wavelength of 555 nm, which is close to the wavelength of light to which human eyes have the highest luminosity. Therefore, it is preferable to emit orange light. It is preferable that the size of the first phosphor layer 12 in plan view is the same as that of the first LED die 10, ie, 130 [μm] or more×240 [μm] or more. The size of the first phosphor layer 12 in plan view is, for example, 270 [μm]×440 [μm]. When the size of the first phosphor layer 12 is smaller than the size of the first LED die 10, the light from the first LED die 10 is blocked by the encapsulating resin 6, resulting in darkening. Further, the size of the first phosphor layer 12 when viewed from above may be 160 [μm] or more×270 [μm] or more, or may be 190 [μm] or more×300 [μm] or more. . When the first phosphor layer 12 is arranged on the top of the first LED die 10, even if there is a shift, the entire top of the first LED die 10 is covered with the first phosphor layer 12, so that it does not become dark. The size of the light emitting surface from the first light emitting element 1 is defined by the size of the first phosphor layer 12 surrounded by the sealing resin 6 . The size of the first phosphor layer 12 is preferably such that the light emitting surface from the first light emitting element 1 has substantially the same size as the first light emitting element 1 . This is because if the size of the emission surface of the light from the first light emitting element 1 is smaller than the size of the first light emitting element 1, the light from the first light emitting element 1 is blocked by the sealing resin 6, resulting in darkening. The preferred size of the phosphor layer is the same for the second phosphor layer 22 and the third phosphor layer 32, so the description is omitted.

The second phosphor layer 22 has a sheet-like shape and is arranged on the surface of the second LED die 20 . The second phosphor layer 22 is a resin layer containing the second phosphor, and the surface opposite to the surface in contact with the second light emitting element 2 is exposed from the surface of the sealing resin 6 . The second phosphor is, for example, a Lu ₃ Al ₅ O ₁₂ :Ce ³⁺ phosphor, also called LuAG. The size of the second phosphor layer 22 in plan view is, for example, 270 [μm]×440 [μm]. The second light emitting element 2 mixes the blue light emitted from the second LED die 20 and the light generated by exciting the phosphor in the second phosphor layer 22 when the blue light is incident. The generated lime-colored light is emitted as the second light. Although the second light emitting element 2 may emit yellow light, it emits lime color light which is close to the wavelength of 555 nm, which is the light to which the human eye has the highest luminosity, so that the human eye can detect brightness with high sensitivity. Lime colored light is preferred because it can

The third phosphor layer 32 has a sheet-like shape and is disposed on the surface of the third LED die 30 . The third phosphor layer 32 is a resin layer containing the third phosphor, and the surface opposite to the surface in contact with the third light emitting element 3 is exposed from the surface of the sealing resin 6 . The third phosphor is, for example, a Lu ₃ Al ₅ O ₁₂ :Ce ³⁺ phosphor, also called LuAG, like the second phosphor. The size of the third phosphor layer 32 in plan view is, for example, 270 [μm]×440 [μm]. The third light emitting element 3 mixes the blue light emitted from the third LED die 30 and the light generated by exciting the phosphor in the third phosphor layer 32 when the blue light is incident. The generated cyan light is emitted as the third light. In addition, the third phosphor layer 32 may contain a phosphor different from the second phosphor, or may have a resin containing a transparent or diffusing material.

Note that each of the first phosphor layer 12, the second phosphor layer 22 and the third phosphor layer 32 contains the first phosphor, the second phosphor and the third phosphor, but the first phosphor layer At least one of 12, the second phosphor layer 22, and the third phosphor layer 32 may be a resin containing no phosphor and containing a transparent or diffusion material.

Colors such as orange, magenta, lime, yellow and cyan are referred to as neutral colors, while red, green and blue are referred to as solid colors. When the light emitting element emits intermediate color light, the range of chromaticities that can be emitted is narrower than when the light emitting element emits monochromatic light. However, since neutral-colored light contains light in a wider wavelength band than monochromatic light, using a light-emitting element that emits neutral-colored light results in a higher energy efficiency than using a light-emitting element that emits monochromatic light. Bright white light can be emitted.

The light-emitting device according to this embodiment has three light-emitting elements that emit intermediate color light, and can emit white light with higher brightness than a light-emitting device that has three light-emitting elements that emit monochromatic light.

Incident light L1 emitted from the light emitting device 101 is incident from the side surface of the light guide sheet 300, diffused by the light guide sheet 300, and emitted through the opening 501 provided in the mask 500 as emitted light L2.

The first light emitting element 1 , the second light emitting element 2 , and the third light emitting element 3 are arranged along a predetermined arrangement direction, which is the longitudinal direction of the substrate 5 . For example, the first light emitting element 1, the second light emitting element 2, and the third light emitting element 3 are spaced apart in the longitudinal direction of the substrate 5, as shown in FIG. The distance between the first phosphor layer 12 and the second phosphor layer 22 and the distance between the first phosphor layer 12 and the third phosphor layer 32 are 40 [μm]. The first phosphor layer 12 protrudes from the side surface of the first LED die 10 by 100 [μm] in the arrangement direction of the first light emitting element 1, the second light emitting element 2, and the third light emitting element 3. As shown in FIG. The second phosphor layer 22 protrudes 100 μm from the side surface of the second LED die 20 in the arrangement direction of the first light emitting element 1, the second light emitting element 2, and the third light emitting element 3. FIG. The third phosphor layer 32 protrudes 100 μm from the side surface of the third LED die 30 in the arrangement direction of the first light emitting element 1 , the second light emitting element 2 and the third light emitting element 3 . The distance between the first LED die 10 and the second LED die 20 and the distance between the first LED die 10 and the third LED die 30 are 240 [μm]. Also, the first light emitting element 1 is arranged between the second light emitting element 2 and the third light emitting element 3 . By disposing the first light-emitting element 1 between the second light-emitting element 2 and the third light-emitting element 3, the light-emitting device 101 according to the embodiment can improve color mixing and reduce color breakup. .

The first phosphor layer 12, the second phosphor layer 22, and the third phosphor layer 32 disposed on the top of the first light emitting element 1, the second light emitting element 2, and the third light emitting element 3, respectively, are sealed. It is exposed from the surface of the stopper resin 6 . The first phosphor layer 12, the second phosphor layer 22, and the third phosphor layer 32 function as light guides, and can efficiently output the first light, the second light, and the third light.

The sealing resin 6 is a white resin, for example, epoxy resin or silicone resin containing titanium oxide. By making the sealing resin 6 white and blocking light emission in the lateral direction of each element, for example, the second light emitted from the second light emitting element 2 enters the first phosphor layer 12 and the first light emission It is possible to suppress the first phosphor layer 12 arranged on the upper part of the element 1 from emitting light. The sealing resin 6 may be transparent or may contain a diffusion material. That is, the sealing resin 6 may be white or translucent resin. A prepreg (PP) 7 as an insulating layer is arranged between the substrate 5 and the sealing resin 6 .

FIG. 4 is a diagram showing an example of a rear perspective view of the light emitting device 101. As shown in FIG. FIG. 5 is a diagram in which the top and bottom surfaces of the light emitting device 101 shown in FIG. 4 are reversed. A first light emitting element 1, a second light emitting element 2, and a third light emitting element 3 are arranged on one surface of the substrate 5, respectively. On the other surface of the substrate 5, electrodes 11 and 21 which are vias for electrically connecting the first light emitting element 1, the second light emitting element 2, and the third light emitting element 3 through the substrate 5 are provided. , 31 and 41 are arranged. The FPC board is omitted in FIGS.

FIG. 6 is a diagram showing another example of a front perspective view of the light emitting device 101 according to the embodiment of the present disclosure. In the light emitting device 101 shown in FIG. 3, the second light emitting element 2 that emits lime light, the first light emitting element 1 that emits orange light, and the third light emitting element 3 that emits cyan light are arranged in this order. Examples are not limited to For example, in the light emitting device 101' shown in FIG. 6, the first light emitting element 1 that emits orange light, the second light emitting element 2 that emits lime light, and the third light emitting element 3 that emits cyan light are arranged in this order.

FIG. 7 is a diagram showing an equivalent circuit diagram of the light emitting device 101. As shown in FIG. The electrodes 11 , 21 , 31 and 41 are connected to wiring on the FPC 200 to supply power to the first light emitting element 1 , the second light emitting element 2 and the third light emitting element 3 respectively. The electrode 41 is connected to the respective anodes of the first light emitting element 1, the second light emitting element 2 and the third light emitting element 3, and the electrodes 11, 21 and 31 are connected to the first light emitting element 1, the second light emitting element 2 and the third light emitting element 3. 3 are connected to the respective cathodes of the light emitting elements 3 . In the light emitting device 101, the anode is the common electrode, but the cathode may be the common electrode. By using one of the anode and the cathode as a common electrode, the light emitting device 101 can be made smaller than when the anode and the cathode are individually wired. Note that the light-emitting device 101 may be mounted with a component other than the light-emitting element, such as a Zener diode for protecting the light-emitting element.

FIG. 8 is a diagram showing a front view of the light emitting device 101. FIG. FIG. 9 is a diagram showing a cross-sectional view of the light emitting device 101 taken along line BB in FIG. FIG. 10 is a diagram showing a cross-sectional view of the light emitting device 101 taken along line CC of FIG. A wiring pattern 8 is formed on the prepreg 7 . Power is supplied to the first light emitting element 1 , the second light emitting element 2 , and the third light emitting element 3 through the wiring pattern 8 . A part of the wiring pattern 8 is connected to the electrodes 11 , 21 , 31 and 41 through the through electrodes 9 . Between the wiring pattern 8 and the first light-emitting element 1, the second light-emitting element 2, and the third light-emitting element 3, a conductive adhesive material containing metal such as sintered silver in solder, epoxy resin, or silicone resin is used. are joined by a bonding pad 13 made of

In order to fill the space between the wiring pattern 8 and the first light emitting element 1, the second light emitting element 2, and the third light emitting element 3, an underfill, which is a white resin obtained by adding titanium oxide to epoxy resin or silicone resin, is used. 14 is injected. The underfill 14 is black in order to prevent light leakage from the prepreg 7 side of the light emitting element, and the first light emitted from each of the first light emitting element 1, the second light emitting element 2, and the third light emitting element 3, The second light and the third light may be blocked. If the underfill 14 is white, the underfill 14 can block and reflect the first light, the second light, and the third light, thereby preventing light leakage and increasing light in the output direction. The fill 14 is preferably white.

Between the first LED die 10 and the first phosphor layer 12 of the first light emitting element 1 , between the second LED die 20 and the second phosphor layer 22 of the second light emitting element 2 , and between the second LED die 20 and the second phosphor layer 22 of the third light emitting element 3 . A preliminary resin 15 made of silicone resin is formed between the three-LED die 30 and the third phosphor layer 32, respectively. The second LED die 20 and the second phosphor layer 22 of the element 2 and the third LED die 30 and the third phosphor layer 32 of the third light emitting element 3 are firmly adhered. Note that the preliminary resin 15 may cover part or all of the side surface of the LED die. By arranging the preliminary resin 15 on the side surface of the LED die, the light in the direction of the side surface of the LED die can be extracted efficiently.

Next, the manufacturing process of the light emitting device 101 will be described with reference to FIGS. 11 to 13. FIG. First, as shown in FIG. 11A, in the first step, the wiring pattern 8 is patterned on the substrate 5 on which the prepreg 7 is formed, and then the bonding pads 13 are transferred onto the wiring pattern 8 .

Next, as shown in FIG. 11B, in a second step, the first LED die 10 of the first light emitting element 1 is die-bonded onto the bonding pad 13 .

Next, as shown in FIG. 11(c), in a third step, a preliminary resin 15 is applied onto the first LED die 10. Then, as shown in FIG.

Next, as shown in FIG. 12A, in a fourth step, the first phosphor layer 12 is mounted on the preliminary resin 15. Then, as shown in FIG.

Next, as shown in FIG. 12(b), in a fifth step, the space formed between the first LED die 10 and the prepreg 7 is coated with the underfill 14 using the first dispenser 16, and pre-cured. be done.

Next, as shown in FIG. 13A, in a sixth step, a frame resin sheet 17 is mounted on the first phosphor layer 12 so as to cover the first phosphor layer 12, and then the sixth step is performed. , the sealing resin 6 is injected using the second dispenser 18 and is temporarily cured.

Then, as shown in FIG. 13B, in the seventh step, the frame resin sheet 17 is removed and fully cured.

As described above, the first light emitting element 1 is formed. Since the manufacturing method of the second light emitting element 2 and the third light emitting element 3 is the same as the manufacturing method of the first light emitting element 1, detailed description of the manufacturing method of the second light emitting element 2 and the third light emitting element 3 is omitted. do.

FIG. 14 is a diagram showing a front view of the light emitting device 101 including the wiring pattern 8. FIG. The anode of the first light emitting element 1 is connected to the anode pattern 81a through the anode bonding pad 1ap. The anode pattern 81a is connected to the electrode 41 via the anode through electrode 91a. The cathode of the first light emitting element 1 is connected to the cathode pattern 82c via the cathode bonding pad 1cp. The cathode pattern 82c is connected to the electrode 11 via the cathode through electrode 92c.

The anode of the second light emitting element 2 is connected to the anode pattern 81a via the anode bonding pad 2ap. The anode pattern 81a is connected to the electrode 41 via the anode through electrode 91a. The cathode of the second light emitting element 2 is connected to the cathode pattern 81c via the cathode bonding pad 2cp. The cathode pattern 81c is connected to the electrode 21 through the cathode through electrode 91c.

The anode of the third light emitting element 3 is connected to the anode pattern 81a through the anode bonding pad 3ap. The anode pattern 81a is connected to the electrode 41 via the anode through electrode 91a. The cathode of the third light emitting element 3 is connected to the cathode pattern 83c via the cathode bonding pad 3cp. The cathode pattern 83c is connected to the electrode 31 via the cathode through electrode 93c. The anode pattern 81a and the cathode patterns 81c, 82c and 83c are included in the wiring pattern 8 shown in FIG. 10 and the like.

The circuit arrangement shown in FIG. 14 is an example, and other circuit arrangements can be adopted. In addition, the wiring pattern 8 is not exposed in the longitudinal direction and the lateral direction of the substrate 5 . Since the sealing resin 6 and the prepreg 7 have stronger adhesion than the sealing resin 6 and the wiring pattern 8, the sealing resin 6 is less likely to peel off when an external force is applied. If the area of direct contact between the sealing resin 6 and the prepreg 7 is increased, the adhesion becomes stronger.

15(a) is a diagram showing the height of the first light emitting element, and FIG. 15(b) is a diagram showing the height of the second light emitting element 2 and the third light emitting element 3. FIG. The height of the first LED die 10, which is a blue LED die, is, for example, 90 [μm], and the height of the first phosphor layer 12 is, for example, 100 [μm]. The height of the second LED die 20 and the third LED die 30, which are blue LED dies, is, for example, 80 [μm], and the height of the second phosphor layer 22 and the third phosphor layer 32 is, for example, 110 [μm]. μm]. Therefore, the heights of the first light emitting element 1, the second light emitting element 2, and the third light emitting element 3 are, for example, 190 [μm]. If the heights of the first light emitting element 1, the second light emitting element 2, and the third light emitting element 3 are all the same, as shown in FIG. Since the sheet 17 does not tilt and no gap is formed between the first light emitting element 1, the second light emitting element 2, and the third light emitting element 3 and the frame resin sheet 17, formation of the sealing resin 6 can be prevented. , and the decrease in brightness due to the sealing resin 6 can be suppressed.

Here, by setting the height of the sealing resin 6 to 190 [μm], the sides of the first light emitting element 1 , the second light emitting element 2 and the third light emitting element 3 are covered with the sealing resin 6 .

When increasing the amount of light incident on the light guide sheet 300, it is preferable to move the light emitting device 101 closer to the light guide sheet 300, but the design of the FPC 200 must be changed. Therefore, if the sealing resin 6 of the light emitting device 101 and the first phosphor layer 12, the second phosphor layer 22 and the third phosphor layer 32 are thickened, the design of the FPC 200 does not have to be changed. However, when the first phosphor layer 12, the second phosphor layer 22, and the third phosphor layer 32 are thickened, light is repeatedly reflected in the phosphor layers, resulting in a decrease in luminous efficiency. Therefore, it is preferable to dispose a resin sheet that is transparent or contains a diffusion material on the first phosphor layer 12 , the second phosphor layer 22 and the third phosphor layer 32 . That is, the transparent resin may be arranged on the first phosphor layer 12 , the second phosphor layer 22 and the third phosphor layer 32 . For example, if the thickness of the resin sheet is 20 [μm], the height of the first light emitting element 1, the second light emitting element 2, and the third light emitting element 3 is 210 [μm]. That is, it can be said that the distance between the light guide sheet 300 and the light emitting device 101 is reduced by the thickness of the resin sheet. The first light-emitting element 1, the second light-emitting element 2, and the third light-emitting element 3 are set to 190 [μm], for example, without using a resin sheet containing a transparent or diffusing material. A material-containing resin may be placed. The resin may be coated by spraying, but if it is squeegeeed after coating, it is preferable because the surface is smooth and the light emission is not uneven.

FIG. 16 is a CIE 1976 UCS chromaticity diagram for each phosphor used in the light emitting device 101, also called the u'v' chromaticity diagram. In FIG. 16, reference numeral 600 indicates the blackbody locus at color temperatures from 2000 [K] to 7000 [K], reference numeral 700a indicates the first region containing the first chromaticity, and reference numeral 800a indicates the second chromaticity. The second area included is shown, and reference numeral 900a indicates the third area in which the third chromaticity is included. The code P1 indicates the coordinates of the first chromaticity, the code P2 indicates the coordinates of the second chromaticity, and the code P3 indicates the coordinates of the third chromaticity.

In the light emitting device 101, the first chromaticity has coordinates (u′, v′) of (0.331, 0.547), (0.433, 0.532), (0.438, 0.482) and Chromaticity within the first region 700a surrounded by four coordinates of (0.323, 0.508). The second chromaticity has coordinates (u', v') of (0.132, 0.550), (0.183, 0.539), (0.162, 0.505) and (0.110, 0.521) is the chromaticity within the second region 800a surrounded by the four coordinates. The third chromaticity has coordinates (u', v') of (0.122, 0.434), (0.197, 0.442), (0.210, 0.253) and (0.110, 0.331) is the chromaticity within the third region 900a surrounded by the four coordinates.

In one example, the coordinates (u', v') of the first chromaticity are (0.372, 0.529), and the coordinates (u', v') of the second chromaticity are (0.145, 0.529). 530), and the coordinates (u', v') of the third chromaticity are (0.173, 0.341).

By setting the first chromaticity, the second chromaticity, and the third chromaticity to the chromaticities within the first region 700a, the second region 800a, and the third region 900a, the light emitting device 101 can achieve the first chromaticity, the second chromaticity, and the third chromaticity. The chromaticity difference between the chromaticity and the third chromaticity is smaller than the chromaticity difference between the single colors. Since the chromaticity difference between the first chromaticity, the second chromaticity, and the third chromaticity is smaller than the chromaticity difference between the monochromatic light, the light emitting device 101 has a light emitting element that emits monochromatic light. It is possible to emit white light with a better color mixing property than the above.

In the light emitting device 101, in the CIE1976 UCS chromaticity diagram, the coordinates of the first, second, and third chromaticities are mixed with the first, second, and third chromaticities. The average value of the distances between the coordinates of the chromaticity of the combined light is preferably less than 0.16. The light emitting device 101 sets the average distance between the coordinates of the chromaticity of the combined light obtained by mixing the first chromaticity, the second chromaticity, and the third chromaticity to less than 0.16, thereby achieving high luminance. of white light can be emitted. The average value of the distances between the coordinates of the first chromaticity, the second chromaticity, and the third chromaticity and the coordinate of the chromaticity of the combined light is 0.13 or more and 0.15 or less. is more preferable.

Further, in the light emitting device 101, the distance between the coordinates of the first chromaticity of the first light and the coordinates of the chromaticity of the synthesized light is the second chromaticity of the second light and the third color of the third light. It is preferably longer than the distance between the degree coordinates and the chromaticity coordinates of the combined light. The light emitting device 101 synthesizes the distance between the coordinates of the first chromaticity of the centrally arranged first light emitting element 1 and the coordinates of the chromaticity of the combined light with the coordinates of the second and third chromaticities. Color unevenness between the second light and the third light can be suppressed by making the distance longer than the distance between the chromaticity coordinates of the light.

FIG. 17 is a diagram (Part 1) showing the distances between the coordinates of the first, second, and third chromaticities and the coordinates of the chromaticity of the combined light. FIG. 18 is a diagram (Part 2) showing the distances between the coordinates of the first chromaticity, the second chromaticity, and the third chromaticity and the coordinates of the chromaticity of the combined light. FIG. 19 is a diagram (part 3) showing the distances between the coordinates of the first chromaticity, the second chromaticity, and the third chromaticity and the coordinates of the chromaticity of the combined light.

In FIG. 17, the coordinates P1 of the first chromaticity are (0.335, 0.515), the coordinates P2 of the second chromaticity are (0.155, 0.515), and the coordinates of the third chromaticity are P3 is (0.130, 0.345). The light emitting device 101 outputs white light with coordinates PA of (0.200, 0.465) and a color temperature of 6500 [K] as synthesized light.

The distance d11 between the first chromaticity coordinate P1 and the chromaticity coordinate PA of the combined light is 0.144. The distance d21 between the second chromaticity coordinate P2 and the chromaticity coordinate PA of the combined light is 0.067. The distance d31 between the third chromaticity coordinate P3 and the chromaticity coordinate PA of the combined light is 0.139. The average value of the distances between the coordinates of the first chromaticity, the second chromaticity, and the third chromaticity and the coordinate of the chromaticity of the combined light is (0.144+0.067+0.139)/3=0 .117, which is less than 0.16. Also, the distance d11 between the coordinates P1 and PA is longer than the distance d21 between the coordinates P2 and PA and the distance d31 between the coordinates P3 and PA.

In FIG. 18, the coordinates P1 of the first chromaticity are (0.380, 0.520), the coordinates P2 of the second chromaticity are (0.145, 0.530), and the coordinates of the third chromaticity are P3 is (0.140, 0.370). The light emitting device 101 outputs white light with coordinates PB of (0.222, 0.500) and a color temperature of 4200 [K] as synthesized light.

The distance d12 between the first chromaticity coordinate P1 and the chromaticity coordinate PB of the combined light is 0.159. The distance d22 between the second chromaticity coordinate P2 and the chromaticity coordinate PB of the combined light is 0.083. The distance d32 between the third chromaticity coordinate P3 and the chromaticity coordinate PB of the combined light is 0.154. The average value of the distances between the coordinates of the first chromaticity, the second chromaticity, and the third chromaticity and the coordinate of the chromaticity of the combined light is (0.159+0.083+0.154)/3=0 .132, greater than or equal to 0.13 and less than or equal to 0.15. Also, the distance d12 between the coordinates P1 and PB is longer than the distance d22 between the coordinates P2 and PB and the distance d32 between the coordinates P3 and PB.

In FIG. 19, the coordinates P1 of the first chromaticity are (0.425, 0.525), the coordinates P2 of the second chromaticity are (0.135, 0.540), and the coordinates of the third chromaticity are P3 is (0.170, 0.400). The light emitting device 101 outputs white light with coordinates PC of (0.258, 0.525) and a color temperature of 2800 [K] as synthesized light.

The distance d13 between the first chromaticity coordinate P1 and the chromaticity coordinate PC of the combined light is 0.167. The distance d23 between the second chromaticity coordinate P2 and the chromaticity coordinate PC of the combined light is 0.124. A distance d33 between the third chromaticity coordinate P3 and the chromaticity coordinate PC of the combined light is 0.153. The average value of the distances between the coordinates of the first chromaticity, the second chromaticity, and the third chromaticity and the coordinate of the chromaticity of the combined light is (0.167+0.124+0.153)/3=0 .148, greater than or equal to 0.13 and less than or equal to 0.15.

Also, the peak wavelength of light emitted from each of the first phosphor, the second phosphor, and the third phosphor contained in the first phosphor layer 12, the second phosphor layer 22, and the third phosphor layer 32 is is preferably 495 nm or more and 615 nm or less. The peak wavelength of the light emitted from the phosphor is the wavelength at which the light intensity of the light emitted from the phosphor is maximized in the light spectrum of the light emitted from the light emitting element. In the light emitting device 101, the wavelengths of the light emitted from the first to third phosphors are 495 nm or more and 615 nm or less. By emitting , it is possible to emit light with a large luminous flux.

FIG. 20 is a diagram showing optical spectra of the first light, the second light, and the third light emitted from the first light emitting element 1, the second light emitting element 2, and the third light emitting element 3. FIG. In FIG. 20, the horizontal axis indicates wavelength and the vertical axis indicates normalized light intensity. The double arrow F is the wavelength range that is greater than or equal to 495 nm and less than or equal to 615 nm.

A waveform W101 indicates the light spectrum of the first light emitted from the first light emitting element 1 when the color temperature of the synthesized light is 3000 [K], and a waveform W111 indicates the color temperature of the synthesized light is 6000 [K]. 3 shows an optical spectrum of the first light emitted from the first light emitting element 1 when the light is emitted. A waveform W102 represents the spectrum of the second light emitted from the second light emitting element 2 when the color temperature of the combined light is 3000 [K], and a waveform W112 represents the color temperature of the combined light of 6000 [K]. 4 shows the optical spectrum of the second light emitted from the second light-emitting element 2 in some cases. Waveform W103 indicates the light spectrum of the third light emitted from the third light emitting element 3 when the color temperature of the synthesized light is 3000 [K], and waveform W113 indicates the color temperature of the synthesized light is 6000 [K]. 3 shows the optical spectrum of the first light emitted from the third light-emitting element 3 in some cases.

The arrow P11 indicates the peak wavelength of the light emitted from the first phosphor when the color temperature of the synthesized light is 3000 [K], and the arrow P12 indicates the peak wavelength when the color temperature of the synthesized light is 6000 [K]. 1 shows the peak wavelength of light emitted from one phosphor. The arrow P21 indicates the peak wavelength of the second light emitting element 2 when the color temperature of the combined light is 3000 [K], and the arrow P22 indicates the peak wavelength from the second phosphor when the color temperature of the combined light is 6000 [K]. It shows the peak wavelength of emitted light. Arrow P31 indicates the peak wavelength of light emitted from the third phosphor when the color temperature of the synthesized light is 3000 [K], and arrow P32 indicates the peak wavelength of light emitted from the third phosphor when the color temperature of the synthesized light is 6000 [K]. 3 shows peak wavelengths of light emitted from phosphors.

When the color temperature of the combined light is 3000 [K], emitted from the first to third phosphors contained in the first phosphor layer 12, the second phosphor layer 22 and the third phosphor layer 32 The peak wavelengths of the light are 608 nm, 513 nm and 505 nm, respectively. When the color temperature of the combined light is 6000 [K], emitted from the first to third phosphors contained in the first phosphor layer 12, the second phosphor layer 22 and the third phosphor layer 32 The peak wavelengths of the light are 606 nm, 515 nm and 510 nm, respectively. In the light emitting device 101, regardless of whether the color temperature of the combined light is 3000 [K] or 6000 [K], the peak wavelength of the light emitted from the first to third phosphors is the human visibility. is a wavelength range of 495 nm or more and 615 nm or less, which is close to the highest light wavelength of 555 nm, and can emit white light that can be detected by human eyes with high sensitivity.

Further, the light emitting device 101 includes the first light emitting element 1 that emits the first light having the first chromaticity having the longest distance between the coordinates of the chromaticity of the combined light and the second light emitting element 2 and the third light emitting element 1 . By arranging it between the third light emitting element 3 that emits light, it is possible to suppress color breakup of the emitted combined light.

FIG. 21A shows a first light emitting element 1 that emits a first light that is orange light, a second light emitting element 2 that emits a second light that is lime light, and a third light emitting element that emits a third light that is cyan light. 3 is a diagram showing the chromaticity distribution of combined light emitted from the light emitting device 101 arranged between the three light emitting elements 3. FIG. FIG. 21B shows a second light emitting element 2 that emits the second light that is lime light, a third light emitting element 3 that emits the third light that is cyan light, and a third light emitting element 3 that emits the first light that is orange light. 1 is a diagram showing a chromaticity distribution of combined light emitted from a light emitting device 101' arranged between one light emitting element 1; FIG. The light emitting device 101' corresponds to a comparative example. FIGS. 21(a) and 21(b) show chromaticity distributions of combined light incident on the light guide sheet 300 from the light emitting device 101 and the light emitting device 101', respectively. The color temperature of the synthesized light emitted from each of the light emitting device 101 and the light emitting device 101' is the same at about 6700 [K].

Orange light, cyan light, and lime light emitted from the light emitting device 101 centered on the first light emitting element 1 that emits the first light, which is orange light, are evenly diffused over the entire light guide sheet 300 . there is Therefore, the chromaticity on the surface of the light guide sheet 300 is generally uniform, and color breakup, which is a phenomenon in which different chromaticities appear in some areas, does not occur. On the other hand, the orange light, the cyan light, and the lime light emitted from the light emitting device 101 ′ centered on the second light emitting element 2 that emits the second light that is the lime color light are diffused evenly in the light guide sheet 300 . It has not been. The orange light, cyan light, and lime light emitted from the light emitting device 101′ are not evenly diffused by the light guide sheet 300, so that they are colored as shown in regions 300a and 300b in FIG. 21(b). Cracking occurs.

Also, the first to third phosphor layers may be exposed up to the light emitting surface and serve as a light guide. By setting it as such a structure. The light emitted from the first to third LED dies can be efficiently output.

The light emitting device 101 mixes the light generated by exciting the blue light emitted from the blue LED die and the blue light incident on the phosphor to generate the first light of orange light, lime color light and cyan color light. to emit the third light, but is not limited to such an example. The light-emitting device according to the embodiment can also be realized by combining red, blue, and green light-emitting elements and transparent sheets instead of the combination of blue light-emitting elements and phosphor layers.

That is, in the above description, in the light emitting device 101 according to the embodiment of the present disclosure, the first light emitting element 1 includes the first LED die 10 and the first phosphor that converts the wavelength of light emitted from the first LED die 10. The second light emitting element 2 includes a second LED die 20 and a second phosphor layer 22 including a second phosphor that converts the wavelength of light emitted from the second LED die 20. and the third light emitting element 3 includes a third LED die 30 and a third phosphor layer 32 including a third phosphor that converts the wavelength of light emitted from the third LED die 30. It is not limited to such examples. That is, as the first to third light emitting elements, an LED die emitting each color of RGB and a transparent sheet may be combined.

Specifically, the light-emitting device includes a first light-emitting element that emits red light, a second light-emitting element that emits green light, and a third light-emitting element that emits blue light. , a first LED die and a first phosphor layer containing a resin that is transparent without containing a phosphor or contains a diffusion material, and a second light emitting element is transparent without containing the second LED die and a phosphor. or a second phosphor layer containing a resin containing a diffusion material, and the third light emitting element includes a third LED die and a third phosphor layer that is transparent without containing a phosphor or contains a resin containing a diffusion material. and a phosphor layer. Also, at least one of the first LED die, the second LED die, or the third LED die may emit intermediate color light such as orange, magenta, lime, yellow, and cyan.

The light emitting device 101 also includes first to third light emitting elements 1 to 3 that emit a first light that is orange light, a second light that is lime light, and a third light that is cyan light. However, in the light emitting device according to the embodiment, the average value of the distances between the coordinates of the first, second, and third chromaticities and the coordinates of the chromaticity of the combined light is 0.16. If it is less than that, the first to third light emitting elements 1 to 3 that emit light of other colors may be provided.

In the light-emitting device 101, the widths of the first light-emitting element 1, the second light-emitting element 2 and the third light-emitting element 3 are the same in the arrangement direction. The width in the arrangement direction of the second light emitting element 2 and the third light emitting element 3 may be different. For example, the width of the first light emitting element 1 in the arrangement direction may be wider than the width of the second light emitting element 2 and the third light emitting element 3 in the arrangement direction.

FIG. 22 is a diagram showing a light emitting device according to a first modified example. FIG. 22 is a cross-sectional view corresponding to the cross-sectional view shown in FIG.

The light emitting device 102 has a first phosphor layer 12 a instead of the first phosphor layer 12 , and a first light emitting element 1 a having a first LED die 10 a instead of the first LED die 10 instead of the first light emitting element 1 . is different from the light-emitting device 101 in that The configuration and function of the constituent elements of the light emitting device 102 other than the first light emitting element 1a are the same as the configuration and function of the constituent elements of the light emitting device 101 denoted by the same reference numerals, so detailed description thereof will be omitted here.

The width W1 in the arrangement direction of the first phosphor layer 12a is larger than the width W2 in the arrangement direction of the second phosphor layer 22 and the width W3 in the arrangement direction of the third phosphor layer 32. differ from Since the configuration and function of the first phosphor layer 12a other than the width W1 in the arrangement direction are the same as those of the first phosphor layer 12, detailed description thereof will be omitted here.

The width W1 in the arrangement direction of the first phosphor layer 12a is 20% wider than the width W2 in the arrangement direction of the second phosphor layer 22 and the width W3 in the arrangement direction of the third phosphor layer 32, and the first LED die 10a is , the size when viewed from above is 170 [μm]×315 [μm]. Since the width W1 in the arrangement direction of the first phosphor layer 12a is wider than the width W2 in the arrangement direction of the second phosphor layer 22 and the width W3 in the arrangement direction of the third phosphor layer 32, the arrangement of the first light emitting elements 1a The width in the direction is wider than the width in the arrangement direction of the second light emitting element 2 and the third light emitting element 3 . Since the width in the arrangement direction of the first light emitting element 1a is wider than the width in the arrangement direction of the second light emitting element 2 and the third light emitting element 3, and the size of the first LED die 10a is large, the light emitted from the first light emitting element 1a The light amount of the first light emitted from the first light emitting element 1 is larger than the light amount of the first light emitted from the first light emitting element 1 . In the light emitting device 102, by increasing the amount of the first light emitted from the first light emitting element 1a, it is possible to widen the reproducible color gamut as compared to the light emitting device 101. FIG.

In the light-emitting device 102, the width W1 is 20% wider than the widths W2 and W3. The width may be 10% or more and 40% or less than the width in the arrangement direction of the body.

Further, in the light emitting device 101, the heights of the first light emitting element 1, the second light emitting element 2 and the third light emitting element 3 are the same. The height of the element 2 and the third light emitting element 3 may be different. For example, the height of the first light emitting element 1 may be higher than the heights of the second light emitting element 2 and the third light emitting element 3 .

FIG. 23 is a diagram showing a light emitting device according to a second modified example. FIG. 23 is a cross-sectional view corresponding to the cross-sectional view shown in FIG.

The light emitting device 103 differs from the light emitting device 101 in that instead of the first light emitting element 1, the first light emitting element 1b having the first phosphor layer 12b instead of the first phosphor layer 12 is provided. The configurations and functions of the constituent elements of the light emitting device 103 other than the first phosphor layer 12b are the same as those of the constituent elements of the light emitting device 101 denoted by the same reference numerals, and detailed descriptions thereof are omitted here.

The difference from the first phosphor layer 12 is that the height H1 of the first phosphor layer 12b is higher than the height H2 of the second phosphor layer 22 and the height H3 of the third phosphor layer 32 . Since the configuration and function of the first phosphor layer 12b other than the height H1 are the same as those of the first phosphor layer 12, detailed description thereof is omitted here.

The height H1 of the first phosphor layer 12b is higher than the height H2 of the second phosphor layer 22 and the height H3 of the third phosphor layer 32 by 100 [μm]. Since the height H1 of the first phosphor layer 12b is higher than the height H2 of the second phosphor layer 22 and the height H3 of the third phosphor layer 32, the height of the first light emitting element 1b is equal to that of the second light emission. It is higher than the height of the element 2 and the third light emitting element 3 . Since the height of the first light emitting element 1b is higher than the heights of the second light emitting element 2 and the third light emitting element 3, the light amount of the first light emitted from the side surface of the first light emitting element 1b is It is larger than the light quantity of the 1st light emitted from the side surface. Since the amount of the first light emitted from the side surface of the first light emitting element 1b is larger than the amount of the first light emitted from the side surface of the first light emitting element 1b, the first light emitted from the first light emitting element 1b is wider than the directivity angle of the first light emitted from the first light emitting element 1 . In the light emitting device 103, by widening the directivity angle of the first light emitted from the first light emitting element 1b, the color mixing properties of the first light, the second light, and the third light are improved more than in the light emitting device 101. can be done.

In the light-emitting device 103, the height H1 is higher than the heights H2 and H3 by 100 [μm]. And the height may be 50 [μm] or more and 200 [μm] or less higher than the height of the third phosphor.

Moreover, it is preferable that the second phosphor and the third phosphor are made of the same component. By using the same component for the second phosphor and the third phosphor, the light-emitting devices 101 to 103 can use a common phosphor. A reduction in manufacturing costs can be realized through utilization.

In the light-emitting device 101, the first to third phosphor layers 12 to 32 have a sheet-like shape, but in the light-emitting device according to the embodiment, the first to third phosphor layers are , may have a domed shape.

Further, in the light emitting device 101, the first phosphor layer 12 to the third phosphor layer 32 are arranged on the surfaces of the first LED die 10 to the third LED die 30, respectively. However, in the light emitting device according to the embodiment, the first to third phosphor layers are formed on the side surfaces of the first to third LED dies 10 to 30 in addition to the surfaces of the first to third LED dies 10 to 30. You may arrange|position so that a part or all may be covered.

Further, the light emitting device according to the embodiment may be in the following aspects.
(Aspect 1)
A side emission type light emitting device,
a first light emitting element that emits orange light;
a second light emitting element that emits lime-colored light;
a third light emitting element that emits cyan light;
a substrate on which the first to third light emitting elements are mounted;
a sealing resin arranged on the substrate and sealing the first light emitting element to the third light emitting element;
The first light emitting element includes a first LED die and a first phosphor layer including a first phosphor that converts the wavelength of light emitted from the first LED die,
the second light emitting element includes a second LED die and a second phosphor layer including a second phosphor that converts the wavelength of light emitted from the second LED die;
the third light emitting element includes a third LED die and a third phosphor layer including a third phosphor that converts the wavelength of light emitted from the third LED die;
A light-emitting device characterized by:
(Aspect 2)
The light-emitting device according to aspect 1, wherein the first phosphor layer, the second phosphor layer, and the third phosphor layer are exposed on the surface of the sealing resin.
(Aspect 3)
Aspect 1 or 2, wherein the substrate is provided with vias for electrically connecting each of the first light emitting element, the second light emitting element, and the third light emitting element through the substrate. luminous device.
(Aspect 4)
4. The light-emitting device of any one of aspects 1-3, wherein at least one of the first phosphor layer, the second phosphor layer, and the third phosphor layer is transparent.
(Aspect 5)
5. The light-emitting device according to any one of aspects 1 to 4, wherein a transparent resin is disposed on the first phosphor layer, the second phosphor layer, and the third phosphor layer.
(Aspect 6)
The light-emitting device according to any one of modes 1 to 5, wherein the sealing resin is a white or translucent resin.
(Aspect 7)
The emission surfaces of the light emitting elements of the first light emitting element, the second light emitting element, and the third light emitting element are approximately the same size as the first light emitting element, the second light emitting element, and the third light emitting element, respectively. 7. The light-emitting device according to any one of Modes 1 to 6.

Reference Signs List 1, 1a, 1b First light emitting element 2 Second light emitting element 3 Third light emitting element 5 Substrate 6 Sealing resin 10, 10a First LED die 12, 12a, 12b First phosphor layer 20 Second LED die 22 Second phosphor Layer 30 Third LED die 32 Third phosphor layer 101, 102, 103 Light emitting device

Claims (8)

a substrate;
a first light emitting element mounted on the substrate and emitting a first light having a first chromaticity;
a second light emitting element mounted on the substrate adjacent to the first light emitting element and emitting second light having a second chromaticity different from the first chromaticity;
a third light having a third chromaticity different from the first chromaticity and the second chromaticity; a third light emitting element that emits light;
a sealing resin that seals at least part of side surfaces of the first light emitting element, the second light emitting element, and the third light emitting element; A light emitting device that emits synthetic light obtained by mixing light,
In the CIE1976 UCS chromaticity diagram, the average value of the distances between the coordinates of each of the first, second, and third chromaticities and the coordinates of the chromaticity of the combined light is 0.5. 16 or less. The first light emitting element is arranged between the second light emitting element and the third light emitting element,
In the CIE1976 UCS chromaticity diagram, the distance between the coordinates of the first chromaticity and the coordinates of the chromaticity of the combined light is equal to the coordinates of the second and third chromaticities and the chromaticity of the combined light. 2. The light-emitting device of claim 1, wherein the distance between the coordinates of . 3. The light emitting device according to claim 2, wherein the width of said first light emitting element in said array direction is wider than the width of said second light emitting element and said third light emitting element in said array direction. 4. The light-emitting device according to claim 2, wherein the height of said first light-emitting element is higher than the heights of said second light-emitting element and said third light-emitting element. In the CIE1976 UCS chromaticity diagram,
The first chromaticity is such that (u', v') is (0.331, 0.547), (0.433, 0.532), (0.438, 0.482) and (0.323, 0.508) is the chromaticity within the area bounded by the four coordinates,
The second chromaticity is such that (u', v') is (0.132, 0.550), (0.183, 0.539), (0.162, 0.505) and (0.110, 0.521) is the chromaticity in the area enclosed by the four coordinates,
The third chromaticity is such that (u', v') is (0.122, 0.434), (0.197, 0.442), (0.210, 0.253) and (0.110, 0.331) is the chromaticity in the area bounded by the four coordinates,
The light-emitting device according to any one of claims 2-4. The first light emitting element has an LED die that emits blue light and a first phosphor layer that includes a first phosphor that converts the wavelength of light emitted from the LED die,
The second light emitting element has the LED die and a second phosphor layer containing a second phosphor that converts the wavelength of light emitted from the LED die,
The third light emitting element has the LED die and a third phosphor layer containing a third phosphor that converts the wavelength of light emitted from the LED die,
The light-emitting device according to any one of claims 1-5. 7. The light emitting device according to claim 6, wherein peak wavelengths of light emitted from each of said first phosphor, said second phosphor, and said third phosphor are 495 nm or more and 615 nm or less. 8. The light-emitting device according to claim 6, wherein said second phosphor and said third phosphor consist of the same component.

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