WO2024157865A1 - 発光装置及びその発光装置を用いた照明装置 - Google Patents

発光装置及びその発光装置を用いた照明装置 Download PDF

Info

Publication number
WO2024157865A1
WO2024157865A1 PCT/JP2024/001219 JP2024001219W WO2024157865A1 WO 2024157865 A1 WO2024157865 A1 WO 2024157865A1 JP 2024001219 W JP2024001219 W JP 2024001219W WO 2024157865 A1 WO2024157865 A1 WO 2024157865A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
emitting element
light emitting
power supply
emitting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2024/001219
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
安昭 萱沼
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Citizen Electronics Co Ltd
Citizen Watch Co Ltd
Original Assignee
Citizen Electronics Co Ltd
Citizen Watch Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Citizen Electronics Co Ltd, Citizen Watch Co Ltd filed Critical Citizen Electronics Co Ltd
Priority to JP2024569041A priority Critical patent/JP7630751B2/ja
Priority to US19/147,885 priority patent/US20260114107A1/en
Priority to DE112024000669.8T priority patent/DE112024000669T5/de
Priority to CN202480008913.XA priority patent/CN120604650A/zh
Publication of WO2024157865A1 publication Critical patent/WO2024157865A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
    • H10H29/00—Integrated devices, or assemblies of multiple devices, comprising at least one light-emitting semiconductor element covered by group H10H20/00
    • H10H29/20—Assemblies of multiple devices comprising at least one light-emitting semiconductor device covered by group H10H20/00
    • H10H29/24—Assemblies of multiple devices comprising at least one light-emitting semiconductor device covered by group H10H20/00 comprising multiple light-emitting semiconductor devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
    • F21K9/68—Details of reflectors forming part of the light source
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
    • F21K9/69—Details of refractors forming part of the light source
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
    • H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
    • H10H20/80—Constructional details
    • H10H20/85—Packages
    • H10H20/857—Interconnections, e.g. lead-frames, bond wires or solder balls
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
    • H10H29/00—Integrated devices, or assemblies of multiple devices, comprising at least one light-emitting semiconductor element covered by group H10H20/00
    • H10H29/80—Constructional details
    • H10H29/85—Packages
    • H10H29/857—Interconnections
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • F21V5/04—Refractors for light sources of lens shape
    • F21V5/045—Refractors for light sources of lens shape the lens having discontinuous faces, e.g. Fresnel lenses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/04—Optical design
    • F21V7/06—Optical design with parabolic curvature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2105/00—Planar light sources
    • F21Y2105/10—Planar light sources comprising a two-dimensional [2D] array of point-like light-generating elements
    • F21Y2105/14—Planar light sources comprising a two-dimensional [2D] array of point-like light-generating elements characterised by the overall shape of the two-dimensional [2D] array
    • F21Y2105/16—Planar light sources comprising a two-dimensional [2D] array of point-like light-generating elements characterised by the overall shape of the two-dimensional [2D] array square or rectangular, e.g. for light panels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2105/00—Planar light sources
    • F21Y2105/10—Planar light sources comprising a two-dimensional [2D] array of point-like light-generating elements
    • F21Y2105/14—Planar light sources comprising a two-dimensional [2D] array of point-like light-generating elements characterised by the overall shape of the two-dimensional [2D] array
    • F21Y2105/18—Planar light sources comprising a two-dimensional [2D] array of point-like light-generating elements characterised by the overall shape of the two-dimensional [2D] array annular; polygonal other than square or rectangular, e.g. for spotlights or for generating an axially symmetrical light beam
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
    • H10H29/00—Integrated devices, or assemblies of multiple devices, comprising at least one light-emitting semiconductor element covered by group H10H20/00
    • H10H29/80—Constructional details
    • H10H29/85—Packages
    • H10H29/855—Optical field-shaping means, e.g. lenses
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
    • H10H29/00—Integrated devices, or assemblies of multiple devices, comprising at least one light-emitting semiconductor element covered by group H10H20/00
    • H10H29/80—Constructional details
    • H10H29/85—Packages
    • H10H29/855—Optical field-shaping means, e.g. lenses
    • H10H29/856—Reflecting means
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
    • H10H29/00—Integrated devices, or assemblies of multiple devices, comprising at least one light-emitting semiconductor element covered by group H10H20/00
    • H10H29/80—Constructional details
    • H10H29/922—Parallel electrical configurations of multiple light-emitting semiconductor components or devices
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
    • H10H29/00—Integrated devices, or assemblies of multiple devices, comprising at least one light-emitting semiconductor element covered by group H10H20/00
    • H10H29/80—Constructional details
    • H10H29/942—Serial electrical configurations of multiple light-emitting semiconductor components or devices

Definitions

  • the present invention relates to a light-emitting device in which a large number of light-emitting elements are arranged, and a lighting device that uses the light-emitting device.
  • Patent Document 1 describes a light-emitting device that groups a large number of LED elements into a predetermined number of groups and mixes series and parallel connections. The light-emitting device described in Patent Document 1 can prevent the driving voltage from becoming too high and suppress variations in the light emission of individual LED elements.
  • the present invention aims to provide a light-emitting device that provides areas of high average brightness and areas of low average brightness on the light-emitting surface, making it possible to efficiently strengthen irradiation in a specific direction, and a lighting device that uses the light-emitting device.
  • the light emitting device includes a pair of power supply terminals disposed on the substrate, a plurality of first light emitting elements and a plurality of second light emitting elements that emit light when power is supplied between the pair of power supply terminals, and a light emission surface that emits light emitted by the plurality of first light-emitting elements and the plurality of second light-emitting elements, the light emission surface having a first light emission region that is a surface region that includes the center of gravity of the light emission surface in a planar view and a second light emission region that is a surface region that does not include the first light emission region, the plurality of first light-emitting elements are arranged in the first light emission region in a planar view to form a first group of light-emitting elements, and the plurality of second light-emitting elements are arranged in the second light emission region in a planar view to form a second group of light-emitting elements, and the average brightness of the light emitted from the first light emission region is
  • the light emitting device is such that the first light emitting element group includes at least one first light emitting element row in which the plurality of first light emitting elements are arranged, the gap between each of the plurality of first light emitting elements constituting the first light emitting element row is smaller than the element size of the first light emitting element, and the plurality of first light emitting elements are connected in series, while the second light emitting element group includes a plurality of second light emitting element rows in which the plurality of second light emitting elements are arranged, the gap between each of the plurality of second light emitting elements constituting the second light emitting element row is smaller than the element size of the second light emitting element, and the plurality of second light emitting elements are connected in series.
  • the lighting device according to the present invention also includes the above-mentioned light-emitting device and a collector disposed above the light-emitting surface.
  • the light emitting device of the present invention is designed so that the average brightness of the light emitted from the first light emitting region, which includes the center of gravity of the light emitting surface, is higher than the average brightness of the light emitted from the second light emitting region, which does not include the first light emitting region, thereby efficiently enhancing the irradiation from the light emitting device in a specific direction.
  • the gaps between the elements of the multiple first light emitting elements constituting the first light emitting element row are set smaller than the element size of the first light emitting elements, and the gaps between the elements of the multiple second light emitting elements constituting the second light emitting element row are set smaller than the element size of the second light emitting elements, thereby making it possible to suppress the occurrence of color unevenness in the light emitted from the light emitting device.
  • the lighting device of the present invention uses the light-emitting device of the present invention, so it can efficiently provide enhanced illumination in a specific direction while minimizing the occurrence of color unevenness.
  • the lighting device of the present invention uses the light-emitting device of the present invention, which strengthens the emission in a specific direction and weakens the emission in other directions, thereby providing environmentally friendly lighting that suppresses light pollution.
  • the amount of electricity supplied can be reduced, which can contribute to the SDGs.
  • FIG. 1 is a perspective view of a light emitting device according to a first embodiment of the present invention.
  • 1 is a plan view of a light emitting device according to a first embodiment of the present invention.
  • FIG. 1B is an enlarged plan view of the area surrounded by dashed line A in FIG. 1A.
  • 1 is a circuit diagram of a light emitting device according to a first embodiment of the present invention.
  • FIG. 13 is a diagram showing front chromaticity according to different row number ratios at a color temperature of 2700K.
  • FIG. 13 is a diagram showing front chromaticity according to different row number ratios at a color temperature of 5000K.
  • 1 is a schematic diagram showing color unevenness of light emitted from a collector of a light emitting device.
  • FIG. 1 is a graph showing the area ratio of color unevenness in a light emitting device versus element size ratio.
  • FIG. 5 is a plan view of a light emitting device according to a second embodiment of the present invention.
  • FIG. 11 is a plan view of a light emitting device according to a third embodiment of the present invention.
  • FIG. 11 is a plan view of a light emitting device according to a fourth embodiment of the present invention.
  • FIG. 13 is a plan view of a light emitting device according to a fifth embodiment of the present invention.
  • FIG. 13 is a circuit diagram of a light emitting device according to a fifth embodiment of the present invention.
  • FIG. 5 is a plan view of a light emitting device according to a second embodiment of the present invention.
  • FIG. 11 is a plan view of a light emitting device according to a third embodiment of the present invention.
  • FIG. 11 is a plan view of a light emitting device according to a fourth embodiment of the present invention.
  • FIG. 13 is a circuit diagram of a light emitting device according to a sixth embodiment of the present invention.
  • 1 is a characteristic diagram (part 1) showing the luminous intensity distribution of an illumination device using the light-emitting device according to the first embodiment of the present invention and an illumination device using a light-emitting device according to a comparative example.
  • FIG. 13 is a characteristic diagram (part 2) showing the luminous intensity distribution of an illumination device using the light-emitting device according to the first embodiment of the present invention and an illumination device using a light-emitting device according to a comparative example.
  • FIG. 11 is a characteristic diagram (part 3) showing the luminous intensity distribution of an illumination device using the light-emitting device according to the first embodiment of the present invention and an illumination device using a light-emitting device according to a comparative example.
  • 1 is a front view of an illumination device using a light-emitting device according to a first embodiment of the present invention.
  • 1 is a plan view of an illumination device using a light-emitting device according to a first embodiment of the present invention.
  • FIG. 2 is a cross-sectional view of a condenser lens disposed above a light-emitting device.
  • FIG. 11 is a plan view of a light emitting device according to a comparative example.
  • FIG. 4 is a circuit diagram of a light emitting device according to a comparative example.
  • FIG. 1 is a perspective view of a light emitting device having multiple light exit surfaces.
  • FIG. 1A is a perspective view of a light emitting device 1 according to a first embodiment of the present invention
  • FIG. 1B is a plan view of the light emitting device 1. Note that in FIG. 1B, bonding wires 14 and the sealing material 12 shown in FIG. 1A are omitted.
  • FIG. 2 is an enlarged plan view of the area surrounded by dashed line A shown in FIG. 1A. Note that in FIG. 2, the reflecting frame 11 and sealing material 12 shown in FIG. 1A, and the first power supply wiring 91 and second power supply wiring 92 shown in FIG. 1B are omitted.
  • FIG. 3 is a circuit diagram of the light emitting device according to the first embodiment.
  • the light emitting device 1 has a substrate 10, a pair of power terminals, that is, a first power terminal 21 and a second power terminal 22, a plurality of first light emitting elements 31 and a plurality of second light emitting elements 32 constituting a light emitting element group 60, a reflecting frame 11, and a sealing material 12. LED elements are used as the first light emitting elements 31 and the second light emitting elements 32.
  • the substrate 10 is a laminated substrate in which the lower surface of a circuit board made of an insulating material such as glass epoxy resin is bonded to the upper surface of a mounting substrate made of a metal with high thermal conductivity such as aluminum.
  • the upper surface of the substrate 10 has a mounting area 50 in which a plurality of first light-emitting elements 31 and a plurality of second light-emitting elements 32 constituting a light-emitting element group 60 are mounted via an insulating adhesive or the like.
  • the circuit board has a planar shape that is approximately the same as the outer shape of the mounting substrate, and may have an opening surrounding the mounting area 50.
  • a highly light-reflective film may be disposed on the upper surface of the mounting substrate.
  • the substrate 10 may be a substrate made of ceramic with high thermal conductivity.
  • the planar shape of the substrate 10 may be polygonal or elliptical. In this embodiment, the substrate 10 has a planar shape of a square with one side measuring 20 mm.
  • a pair of power terminals, a first power terminal 21 and a second power terminal 22, are arranged on both diagonal corners of the top surface of the substrate 10.
  • the first power terminal 21 and the second power terminal 22 are wiring patterns formed of a conductive thin film such as copper for supplying power supplied from an external power source (not shown) to the first light-emitting elements 31 and the second light-emitting elements 32 mounted in the mounting area 50.
  • the first power terminal 21 and the second power terminal 22 may be solder-plated or gold-plated.
  • Electronic components such as connectors may be mounted on the first power terminal 21 and the second power terminal 22.
  • the first power terminal 21 and the second power terminal 22 may be arranged on the side surface of the substrate 10 or on the bottom surface of the substrate 10.
  • the light-emitting element group 60 is an element group consisting of a first light-emitting element group 61 and a pair of second light-emitting element groups 62, 63 arranged on either side of the first light-emitting element group 61.
  • the first light-emitting element group 61 is a light-emitting element group composed of a plurality of first light-emitting element rows 71.
  • the first light-emitting element row 71 is also a light-emitting element row composed of a plurality of first light-emitting elements 31.
  • the plurality of first light-emitting elements 31 constituting the first light-emitting element row 71 are connected in series by bonding wires 14.
  • the plurality of first light-emitting element rows 71 constituting the first light-emitting element group 61 are connected in parallel by bonding wires 14 between the first power supply pad 81 and the opposing electrode pad 84 arranged on both sides of the first light-emitting element row 71.
  • the first light-emitting element group 61 is composed of four rows of first light-emitting element rows 71
  • the first light-emitting element row 71 is composed of eight first light-emitting elements 31.
  • the second light-emitting element group 62 arranged on one side of the first light-emitting element group 61 is a light-emitting element group composed of a plurality of second light-emitting element rows 72.
  • the second light-emitting element row 72 is also a light-emitting element row composed of a plurality of second light-emitting elements 32.
  • the plurality of second light-emitting elements 32 constituting the second light-emitting element row 72 are connected in series by bonding wires 14.
  • the plurality of second light-emitting element rows 72 constituting the second light-emitting element group 62 are connected in parallel by bonding wires 14 between the opposing electrode pad 84 and the second power supply pad 82 arranged on both sides of the second light-emitting element row 72.
  • the second light-emitting element group 62 is composed of three rows of second light-emitting element rows 72, and the second light-emitting element row 72 is composed of eight second light-emitting elements 32.
  • the second light-emitting element group 63 arranged on the other side of the first light-emitting element group 61 is a light-emitting element group composed of a plurality of second light-emitting element rows 73.
  • the second light-emitting element row 73 is also a light-emitting element row composed of a plurality of second light-emitting elements 32.
  • the plurality of second light-emitting elements 32 constituting the second light-emitting element row 73 are connected in series by bonding wires 14.
  • the plurality of second light-emitting element rows 73 constituting the second light-emitting element group 63 are connected in parallel by bonding wires 14 between the opposing electrode pad 84 and the third power supply pad 83 arranged on both sides of the second light-emitting element row 73.
  • the second light-emitting element group 63 is composed of three rows of second light-emitting element rows 73, and the second light-emitting element row 73 is composed of eight second light-emitting elements 32.
  • the light-emitting elements constituting the second light-emitting element row 73 arranged on the other side are composed of the same second light-emitting elements 32 as the light-emitting elements constituting the second light-emitting element row 72 arranged on one side.
  • the number of second light-emitting elements 32 that make up the second light-emitting element row 73 is the same as the number of second light-emitting elements 32 that make up the second light-emitting element row 72.
  • the number of columns of the first light-emitting element rows 71 constituting the first light-emitting element group 61 is less than the sum of the number of columns of the second light-emitting element rows 72, 73 constituting the pair of second light-emitting element groups 62, 63.
  • the number of columns of the first light-emitting element rows 71 constituting the first light-emitting element group 61 is two columns less than the sum of the number of columns of the second light-emitting element rows 72, 73 constituting the second light-emitting element groups 62, 63.
  • the first light-emitting element 31 is a blue LED die having a rectangular planar shape that has an anode electrode and a cathode electrode, and emits blue light in response to application of a forward voltage between the anode electrode and the cathode electrode.
  • the dominant wavelength of the blue light emitted from the first light-emitting element 31 is in the range between 445 nm and 495 nm.
  • the first light-emitting element 31 is formed by laminating a PN junction layer formed of a gallium nitride layer on a sapphire substrate, which is a transparent substrate.
  • the first light-emitting element 31 has a square planar shape with each side measuring 0.7 mm, and the dominant wavelength of the blue light emitted from the first light-emitting element 31 is 450 nm.
  • the second light-emitting element 32 is a blue LED die having a rectangular planar shape, which has an anode electrode and a cathode electrode, and emits blue light in response to application of a forward voltage between the anode electrode and the cathode electrode.
  • the dominant wavelength of the blue light emitted from the second light-emitting element 32 is in the range between 445 nm and 495 nm.
  • the second light-emitting element 32 is formed by stacking a PN junction layer formed of a gallium nitride layer on a sapphire substrate, which is a transparent substrate.
  • the second light-emitting element 32 may be a light-emitting element having the same characteristics as the first light-emitting element 31.
  • the second light-emitting element 32 may also be a light-emitting element having a smaller element size than the first light-emitting element 31.
  • the second light-emitting element 32 is a light-emitting element having the same characteristics as the first light-emitting element 31.
  • the mounting area 50 is an area on the upper surface of the substrate 10 where a plurality of first light-emitting elements 31 and a plurality of second light-emitting elements 32 constituting the light-emitting element group 60 are mounted, and has a first mounting area 51 and a pair of second mounting areas 52, 53 arranged on both sides of the first mounting area 51.
  • the first mounting area 51 and the second mounting areas 52, 53 are arranged adjacent to each other in a striped pattern.
  • the first mounting area 51 is arranged between the pair of second mounting areas 52, 53 on the left and right in a surface area including the center of gravity of the light emission surface 40, i.e., the center of the mounting area 50.
  • the second mounting areas 52, 53 are arranged in isolation with the first mounting area 51 between them. It is preferable that the mounting area 50 has a rectangular planar shape. It is preferable that the boundary lines L12, L13 indicating the boundaries between the first mounting area 51 and the second mounting areas 52, 53 are straight lines parallel to the second direction shown in FIG. 2. In this embodiment, the mounting area 50 has a rectangular planar shape, and the boundary line L12 and the boundary line L13 are straight lines parallel to the second direction.
  • first mounting area 51 a plurality of first light-emitting elements 31 constituting the first light-emitting element group 61 are mounted. In the first mounting area 51, no light-emitting elements constituting light-emitting element groups other than the first light-emitting element group 61 are mounted.
  • the planar shape of the first mounting area 51 is preferably the smallest rectangle that contains all of the plurality of first light-emitting elements 31 mounted in the first mounting area 51.
  • the first light-emitting elements 31 mounted in the first mounting area 51 may be arranged at equal intervals parallel to the first direction shown in FIG. 2, or may be arranged at equal intervals parallel to the second direction.
  • the first light-emitting elements 31 mounted in the first mounting area 51 are arranged at intervals of 1.0 mm parallel to the first direction and at intervals of 1.0 mm parallel to the second direction.
  • the gap between adjacent first light-emitting elements 32 is 0.3 mm, which is smaller than the size of each vertical and horizontal side of each element of the first light-emitting element 31.
  • the size of each vertical and horizontal side of the element is also referred to as the element size.
  • the second mounting areas 52, 53 are provided with a plurality of second light-emitting elements 32 constituting the second light-emitting element groups 62, 63. No light-emitting elements constituting light-emitting element groups other than the second light-emitting element groups 62, 63 are provided with the second mounting areas 52, 53.
  • the planar shape of the second mounting areas 52, 53 is preferably the smallest rectangle that encompasses all of the plurality of second light-emitting elements 32 mounted in the second mounting areas 52, 53.
  • the second light-emitting elements 32 mounted in the second mounting areas 52, 53 may be arranged at equal intervals parallel to the first direction, or may be arranged at equal intervals parallel to the second direction.
  • the interval length at which the second light-emitting elements 32 mounted in the second mounting areas 52, 53 are arranged in the first direction is preferably equal to or greater than the interval length at which the first light-emitting elements 31 mounted in the first mounting area 51 are arranged in the first direction.
  • the length of the interval at which the second light-emitting elements 32 mounted in the second mounting areas 52 and 53 are arranged in the second direction may be equal to or greater than the length of the interval at which the first light-emitting elements 31 mounted in the first mounting area 51 are arranged in the second direction.
  • the second light-emitting elements 32 mounted in the second mounting areas 52 and 53 are arranged at intervals of 1.0 mm parallel to the first direction, and at intervals of 1.0 mm parallel to the second direction.
  • the gap between adjacent second light-emitting elements 32 is 0.3 mm, which is smaller than the size of each side of the second light-emitting elements 32 in both the vertical and horizontal directions.
  • the first direction mentioned above is the direction in which the first mounting area 51 and the second mounting areas 52 and 53 are arranged adjacent to each other in a striped pattern.
  • the second direction is a direction perpendicular to the first direction on the top surface of the substrate 10.
  • the gap in the first direction between each first light-emitting element 31 of the first light-emitting element row 71 mounted on both ends of the first mounting area 51 and each second light-emitting element 32 of the second light-emitting element row 72, 73 mounted on one end of the pair of second mounting areas 52, 53 adjacent to the first light-emitting element row 71 is smaller than the size of each vertical and horizontal side of each element of the first light-emitting element 31 and the second light-emitting element 32, just like the gap between each element.
  • the gaps between the first light-emitting elements 31 and the second light-emitting elements 32, the gaps between the multiple first light-emitting element rows 71 and the second light-emitting element rows 72, 73, and the gaps between the first light-emitting element row 71 and the second light-emitting element rows 72, 73 are all smaller than the size of each vertical and horizontal side of each element, so that the light emitted from the light emission region of this light-emitting device is well mixed between the elements and color unevenness is suppressed. Therefore, lighting devices using this light-emitting device can provide excellent lighting effects with little color unevenness.
  • the first power supply pad 81, the counter electrode pad 84, the second power supply pad 82, and the third power supply pad 83 are wiring patterns formed of a conductive thin film such as copper arranged on the upper surface of the substrate 10 near the mounting area 50.
  • the first power supply pad 81, the counter electrode pad 84, the second power supply pad 82, and the third power supply pad 83 may be gold-plated. It is preferable that the first power supply pad 81, the counter electrode pad 84, the second power supply pad 82, and the third power supply pad 83 are covered by a reflecting frame 11 that surrounds the periphery of a rectangular light emission surface 40 described later in a rectangular frame shape.
  • the reflecting frame 11 is a rectangular frame-shaped dam provided around the first light-emitting element group 61 and the second light-emitting element group 62, 63, and the first power supply pad 81, the counter electrode pad 84, the second power supply pad 82, and the third power supply pad 83 are arranged on the lower surface side of this dam.
  • the first power supply pad 81 is disposed near the first mounting area 51 on the upper surface of the substrate 10.
  • the first power supply pad 81 is connected to the first power supply terminal 21 via the first power supply wiring 91.
  • the first power supply pad 81 is connected to the anode electrode of the first light-emitting element 31 in the first row of the first light-emitting element row 71 constituting the first light-emitting element group 61 via the bonding wire 14.
  • the light-emitting element in the first row of the light-emitting element row described in the specification refers to a light-emitting element whose anode electrode is connected to the power supply pad via a bonding wire at one end of the light-emitting element row composed of multiple light-emitting elements connected in series.
  • the counter electrode pad 84 is disposed on the upper surface of the substrate 10 near the mounting area 50 that faces the first power supply pad 81 with the first mounting area 51 in between.
  • the counter electrode pad 84 is connected to the cathode electrode of the first light-emitting element 31 at the end of each of the first light-emitting element rows 71 that constitute the first light-emitting element group 61 via the bonding wire 14.
  • the counter electrode pad 84 is also connected to the anode electrode of the second light-emitting element 32 at the beginning of each of the second light-emitting element rows 72 and 73 that constitute the second light-emitting element groups 62 and 63 via the bonding wire 14.
  • the light-emitting element at the end of the light-emitting element row described in the specification refers to a light-emitting element whose cathode electrode is connected to the power supply pad via a bonding wire at the other end of the light-emitting element row that is composed of a plurality of light-emitting elements connected in series.
  • the second power supply pad 82 and the third power supply pad 83 are arranged on the upper surface of the substrate 10 near the second mounting areas 52, 53 that face the counter electrode pad 84 with the second mounting areas 52, 53 in between.
  • the second power supply pad 82 and the third power supply pad 83 are connected to the second power supply terminal 22 via the second power supply wiring 92.
  • the second power supply pad 82 and the third power supply pad 83 are connected via bonding wires 14 to the cathode electrodes of the second light-emitting elements 32 at the final stages of the second light-emitting element rows 72, 73 that constitute the second light-emitting element groups 62, 63.
  • the first power supply pad 81, the second power supply pad 82, and the third power supply pad 83 are each disposed on the upper surface of the substrate 10 near the same side of the mounting area 50 that faces the counter electrode pad 84 with the mounting area 50 in between.
  • the bonding wire 14 is a wire made of a conductor such as gold or copper.
  • the locations electrically connected by the bonding wire 14 may be connected by a wiring pattern made of a conductive thin film such as copper placed on the upper surface of the substrate 10 instead of the bonding wire 14.
  • the first power supply wiring 91 and the second power supply wiring 92 are wiring patterns formed of a conductive thin film such as copper arranged on the upper surface of the substrate 10.
  • the first power supply wiring 91 connects the first power supply terminal 21 and the first power supply pad 81.
  • the second power supply wiring 92 connects the second power supply terminal 22 and the second power supply pad 82 and the third power supply pad 83.
  • the first power supply wiring 91 and the second power supply wiring 92 may be covered with an insulating film 13 also called solder resist.
  • the first power supply wiring 91 and the second power supply wiring 92 may each be composed of a plurality of wiring patterns connected via a conductive jumper member.
  • An electronic component such as a Zener diode or a capacitor may be connected between the first power supply wiring 91 and the second power supply wiring 92.
  • the reflective frame 11 is made of a synthetic resin such as silicone resin containing white particles such as titanium oxide, and has a light reflectance of 80% or more.
  • the reflective frame 11 is disposed on the upper surface of the substrate 10 so as to surround the light-emitting element group 60, and acts as a dam to prevent the sealing material 12 from leaking out.
  • the sealing material 12 is a synthetic resin material containing a phosphor, with a transparent resin such as silicone resin as the base material.
  • the sealing material 12 is arranged in the area surrounded by the reflecting frame 11 so as to cover the mounting area 50 and the light-emitting element group 60.
  • the phosphor contained in the sealing material 12 is, for example, YAG, CASN, SCASN, or KSF, or a mixture of these, and is a wavelength conversion member that absorbs the blue light emitted by the first light-emitting element 31 and the second light-emitting element 32 and emits light with the wavelength converted to red, green, yellow, etc.
  • the light emitting device 1 emits a composite light of the blue light emitted from the first light emitting element 31 and the second light emitting element 32 and the wavelength converted light emitted from the phosphor contained in the sealing material 12 from the light emitting surface 40, which is the upper surface of the sealing material 12.
  • the light exit surface 40 which is formed in a rectangular shape, has a first light exit area 41 in the center, which is a surface area that includes the center of gravity of the light exit surface 40, and a pair of second light exit areas 42, 43 arranged on both sides and which are surface areas that do not include the first light exit area 41.
  • the first light exit area 41 and the second light exit areas 42, 43 respectively show areas that overlap with the first mounting area 51 and the second mounting areas 52, 53 in a plan view, at the same position and with the same shape.
  • the number of columns of the first light-emitting element rows 71 constituting the first light-emitting element group 61 is less than the total number of columns of the second light-emitting element rows 72, 73 constituting the second light-emitting element groups 62, 63. Therefore, the current value of the current flowing through each of the multiple first light-emitting elements 31 constituting the first light-emitting element group 61 is greater than the current value of the current flowing through each of the multiple second light-emitting elements 32 constituting the second light-emitting element groups 62, 63.
  • the luminous flux of light emitted by each of the multiple first light-emitting elements 31 constituting the first light-emitting element group 61 mounted in the first mounting area 51 is greater than the luminous flux of light emitted by each of the multiple second light-emitting elements 32 constituting the second light-emitting element groups 62, 63.
  • the multiple first light-emitting elements 31 constituting the first light-emitting element group 61 and the multiple second light-emitting elements 32 constituting the second light-emitting element groups 62, 63 are arranged at equal intervals in the first mounting area 51 and the second mounting areas 52, 53, respectively. Therefore, the average brightness of the light emitted from the first light emission area 41 is higher than the average brightness of the light emitted from the second light emission areas 42, 43.
  • FIGS. 4A and 4B are diagrams showing the shift in front chromaticity when the row number ratio is set to 1, 2, 3, and 4.
  • the "row number ratio" is the value obtained by dividing the sum of the number of rows of the first light-emitting element row 71 constituting the first light-emitting element group 61 and the number of rows of the second light-emitting element row 72, 73 constituting the second light-emitting element group 62, 63.
  • the black points shown in Figs. 4A and 4B are XY chromaticity coordinates showing the centers of the color temperatures of 2700K and 5000K standardized in ANSI NEMA ANSLG C78.377-2015.
  • the ranges enclosed by the rectangles shown in Figs. 4A and 4B are XY chromaticity coordinates showing the allowable ranges of the color temperatures of 2700K and 5000K standardized in ANSI NEMA ANSLG C78.377-2015.
  • the phosphor contained in the encapsulant 12 is set so that the row number ratio is set to 1 and falls within the allowable range for a color temperature of 5000 K, then a row number ratio of 3 will result in a deviation from the allowable range, and the phosphor setting conditions must be changed.
  • the row number ratio is 2 or less, it will fall within the allowable range, and so there is no need to change the phosphor setting conditions. Therefore, a row number ratio of 2 or less is even more preferable.
  • FIG. 5 shows a schematic diagram of color unevenness in the light emitted from the collector of the light-emitting device, with the ring-shaped black band 8 indicating a portion where the light emitted from each light-emitting element appears as well-mixed light, and the ring-shaped white band 9 indicating a portion where the light emitted from each light-emitting element is not sufficiently mixed and appears as color unevenness.
  • the light emitted from the collector has a larger aberration in the sagittal direction B (rotation direction) than in the tangential direction A (radiation direction), so color unevenness appears in multiple concentric circles as shown in Fig. 5.
  • Figure 6 shows examples of element size ratios that vary depending on the element arrangement.
  • element size ratio element size / element pitch.
  • the example of an element arrangement shown in (a) is when the element size is 1 and the element pitch is 5, resulting in an element size ratio of approximately 20%. In this case, the gap between elements is four times the element size.
  • the example of an element arrangement shown in (b) is when the element size is 1 and the element pitch is 2, resulting in an element size ratio of approximately 50%. In this case, the gap between elements is approximately the same as the element size.
  • the example of an element arrangement shown in (c) is when the element size is 1 and the element pitch is 1.25, resulting in an element size ratio of 80%. In this case, the gap between elements is significantly smaller than the element size.
  • Figure 7 is a graph showing the area ratio of color unevenness of a light-emitting device versus element size ratio.
  • FIG. 8 shows a light-emitting device 1-1 according to a second embodiment of the present invention.
  • This light-emitting device 1-1 has a light-emitting surface 40 formed in a rectangle, surrounded by a rectangular reflecting frame 11.
  • the light-emitting surface 40 is made up of a first light-emitting region in the center, which is a surface area including the center of gravity of the light-emitting surface, and a pair of second light-emitting regions arranged on either side of it.
  • a first group of light-emitting elements 60 corresponds to the first light-emitting region
  • second groups of light-emitting elements 62, 63 correspond to the second light-emitting regions, respectively, and the first and second groups of light-emitting elements constitute a group of light-emitting elements that are mounted in the mounting area of the light-emitting surface.
  • the first light-emitting element group 61 is a light-emitting element group consisting of three first light-emitting element rows 71.
  • the first light-emitting element row 71 is also a light-emitting element row consisting of six first light-emitting elements 31.
  • the multiple first light-emitting elements 31 constituting the first light-emitting element row 71 are connected in series by bonding wires 14.
  • the three first light-emitting element rows 71 constituting the first light-emitting element group 61 are also connected in parallel by bonding wires 14 between the first power supply pad 81 and the opposing electrode pad 84 arranged on either side of the first light-emitting element row 71.
  • the second light-emitting element groups 62, 63 arranged on both sides of the first light-emitting element group 61 are light-emitting element groups each consisting of two second light-emitting element rows 72, 73.
  • the second light-emitting element rows 72, 73 are also light-emitting element rows consisting of six second light-emitting elements 32.
  • the multiple second light-emitting elements 32 constituting the second light-emitting element rows 72, 73 are connected in series with bonding wires 14.
  • the multiple second light-emitting element rows 72, 73 constituting the second light-emitting element groups 62, 63 are connected in parallel with the opposing electrode pad 84 and the second and third power supply pads 82 and 83 arranged on both sides of the second light-emitting element rows 72, 73, with bonding wires 14 between them.
  • the gap between the first light-emitting element 31 and the second light-emitting element 32 is smaller than the size of the light-emitting element.
  • the gap between the first light-emitting element row 71 and the second light-emitting element rows 72, 73 is also smaller than the size of the light-emitting element.
  • a first power supply pad 81, a second power supply pad 82, a third power supply pad 83 and an opposing electrode pad 84 are provided on the underside of a rectangular frame-shaped reflecting frame 11 surrounding the light emission surface 40, and the first power supply pad 81 is connected to a first power supply terminal (not shown), and the second power supply pad 82 and the third power supply pad 83 are connected to a second power supply terminal (not shown).
  • the first power supply pad 81 is connected to a first power supply terminal (not shown)
  • the second power supply pad 82 and the third power supply pad 83 are connected to a second power supply terminal (not shown).
  • the number of columns of the first light-emitting element rows 71 constituting the first light-emitting element group 61 is less than the number of columns of the second light-emitting element rows 72, 73 constituting the second light-emitting element groups 62, 63. Therefore, the current value of the current flowing through each of the multiple first light-emitting elements 31 constituting the first light-emitting element group 61 is greater than the current value of the current flowing through each of the multiple second light-emitting elements 32 constituting the second light-emitting element groups 62, 63.
  • the luminous flux amount of the light emitted by each of the multiple first light-emitting elements 31 constituting the first light-emitting element group 61 mounted in the first mounting area is greater than the luminous flux amount of the light emitted by each of the multiple second light-emitting elements 32 constituting the second light-emitting element groups 62, 63.
  • the multiple first light-emitting elements 31 constituting the first light-emitting element group 61 and the multiple second light-emitting elements 32 constituting the second light-emitting element groups 62, 63 are each arranged at equal intervals in the first mounting area and the second mounting area. Therefore, the average brightness of the light emitted from the first light emission region is higher than the average brightness of the light emitted from the second light emission region.
  • FIG. 9 shows a light-emitting device 1-2 according to a third embodiment of the present invention.
  • This light-emitting device 1-2 has the same configuration as the light-emitting device 1-1 according to the second embodiment, except for the shape of the light-emitting surface 40, the shape of the reflecting frame 11, and the arrangement of the light-emitting elements. Therefore, the same reference numerals are used for common components, and detailed descriptions are omitted.
  • This light-emitting device 1-2 has a light-emitting surface 40 formed in a single circle surrounded by a ring-shaped reflecting frame 11.
  • the first power supply pad 81, the second power supply pad 82, the third power supply pad 83, and the counter electrode pad 84 are provided on the underside of the rectangular reflecting frame 11 that surrounds the light-emitting surface 40.
  • the three first light-emitting element rows 71 constituting the first light-emitting element group 61 have the three first light-emitting elements 31 at both ends of each row positioned close to the reflecting frame 11, specifically at each vertex of a triangle.
  • the two second light-emitting element rows 72, 73 constituting the second light-emitting element groups 62, 63 on the left and right are arranged to draw a curve along the reflecting frame.
  • the arrangement of the first light-emitting elements 31 and the second light-emitting elements 32 corresponds to the circular light exit surface 40, so that sufficient brightness and color unevenness can be suppressed in the portion of the light exit surface 40 close to the reflecting frame 11.
  • Figure 10 shows a light-emitting device 1-3 according to a fourth embodiment of the present invention.
  • This light-emitting device 1-3 has the same configuration as the light-emitting device 1-1 according to the second embodiment, except for the arrangement of the light-emitting elements and the number of light-emitting element rows. Therefore, the same reference numerals are used for the common components, and detailed descriptions are omitted.
  • the first light-emitting element group 61 includes only one first light-emitting element row 71.
  • the six first light-emitting elements 31 that make up the first light-emitting element row 71 are arranged in the center of the light-emitting surface 40.
  • the second light-emitting element rows 72 and 73 that make up the second light-emitting element groups 62 and 63 are made up of a total of 12 second light-emitting elements 32, which are arranged to surround the periphery of the first light-emitting element 31.
  • the two second light-emitting element rows 72 and 73 include six second light-emitting elements 32 each.
  • the first light-emitting element 31 is arranged in the center of the light-emitting surface 40, and the second light-emitting elements 32 surround it, so that the brightness of the center of the light-emitting surface 40 is high and the surrounding area is uniformly bright.
  • FIG. 11 and 12 show a light-emitting device 1-4 according to a fifth embodiment of the present invention.
  • a pair of second light-emitting element groups 62, 63 are arranged on both sides of a first light-emitting element group 61 in the mounting area of the light-emitting surface 40, and a first power supply pad 81 is connected to one of the pair of second light-emitting element groups 62, 63, and a second power supply pad 82 is connected to the other.
  • the first power supply pad 81 and the second power supply pad 82 are provided on the lower surface side of a ring-shaped reflecting frame 11 that surrounds the light-emitting surface 40, and when a current flows from a first power supply terminal (not shown) to the second power supply terminal 22, the multiple first light-emitting elements 31 that make up the first light-emitting element group 61 and the multiple second light-emitting elements 32 that make up the second light-emitting element groups 62, 63 are turned on.
  • the first light-emitting element group 61 includes two first light-emitting element rows 71, each of which includes two first light-emitting elements 31.
  • a pair of second light-emitting element groups 62, 63 each includes four second light-emitting element rows 72, 73, each of which includes one second light-emitting element 32.
  • the two first light-emitting element rows 71 are connected in parallel.
  • the four second light-emitting element rows 72, 73 are also connected in parallel, but the first light-emitting element row 71 and the second light-emitting element row 72, 73 are directly connected in series with bonding wires 14 without an electrode pad between them.
  • the first light-emitting element 31 of the first element row 71 and the second light-emitting element 32 of the second light-emitting element row 72, 73 that are directly connected may have multiple bonding wires 14 connected to their respective anode electrodes or cathode electrodes. Two or less bonding wires 14 are preferably connected to one anode electrode or cathode electrode from the standpoint of process and durability.
  • the row number ratio which is the sum of the number of rows of the first light-emitting element row 71 that constitutes the first light-emitting element group 61 divided by the number of rows of the second light-emitting element rows 72, 73 that constitute the second light-emitting element groups 62, 63, is preferably 2 or less.
  • first light-emitting elements 31 are arranged in the center of the light-emitting surface 40, and eight second light-emitting elements 32 surround them.
  • the first light-emitting elements 31 are arranged in the center of the light-emitting surface 40 and are surrounded by the second light-emitting elements 32, so that the brightness of the center of the light-emitting surface 40 is high and the surrounding area is uniformly bright.
  • FIG. 13 shows a light-emitting device 1-5 according to the sixth embodiment of the present invention.
  • This light-emitting device 1-5 like the light-emitting device 1-4 according to the fifth embodiment, has a pair of second light-emitting element groups 62, 63 arranged on both sides of the first light-emitting element group 61, with a first power supply pad 81 connected to one of the pair of second light-emitting element groups 62, 63 and a second power supply pad 82 connected to the other.
  • the light-emitting device 1-5 differs from the light-emitting device 1-4 according to the fifth embodiment in that the first light-emitting element row 71 constituting the first light-emitting element group 61 and the second light-emitting element row 72, 73 constituting the pair of second light-emitting element groups 62, 63 are connected by counter electrode pads.
  • a counter electrode pad 84a is connected to the other end of the second light-emitting element row 72 connected to the first power supply pad 81 and one end of the first light-emitting element row 71
  • a counter electrode pad 84b is connected to one end of the second light-emitting element row 73 connected to the other end of the first light-emitting element row 71 and the second power supply pad 82.
  • These power supply pads and electrode pads are provided on the underside of a rectangular or ring-shaped reflecting frame that surrounds the light emission surface, and when a current flows from the first power supply terminal to the second power supply terminal, the multiple first light-emitting elements 31 that make up the first light-emitting element group 61 and the multiple second light-emitting elements 32 that make up the second light-emitting element groups 62 and 63 light up.
  • the first light-emitting element group 61 includes two first light-emitting element rows 71, and each light-emitting element row 71 includes two first light-emitting elements 31.
  • a pair of second light-emitting element groups 62, 63 each includes three second light-emitting element rows 72, 73, and each light-emitting element row 72, 73 includes three second light-emitting elements 32.
  • the two first light-emitting element rows 71 are connected in parallel.
  • the three second light-emitting element rows 72, 73 are also connected in parallel, but the first light-emitting element row 71 and the second light-emitting element row 72, 73 are connected in series via opposing electrode pads 84a, 84b between them.
  • FIG. 14A is a characteristic diagram (part 1) showing the luminous intensity distribution of an illumination device using the illumination device 3 according to this embodiment shown in FIGS. 15A and 15B and the light-emitting device 2 according to the comparative example shown in FIGS. 17A and 17B
  • FIG. 14B is a characteristic diagram (part 2) showing the luminous intensity distribution of an illumination device using the illumination device 3 according to this embodiment and the light-emitting device 2 according to the comparative example.
  • the illumination device 3 according to this embodiment uses the light-emitting device 1 according to the first embodiment.
  • FIG. 15A is a front view of the lighting device 3 according to this embodiment
  • FIG. 15B is a plan view of the lighting device 3 according to this embodiment.
  • the lighting device 3 includes a light-emitting device 1, a reflector 4 as a collector that collects and emits light emitted by the light-emitting device 1, and a base 5 having a flat upper surface on which the light-emitting device 1 and the reflector 4 are mounted.
  • the light-emitting device 1 is placed on the upper surface of the base 5, and emits light when power is supplied from an external power source (not shown).
  • the reflector 4 has a top opening 402 and a bottom opening 403, and has a reflective surface 401 between the top opening 402 and the bottom opening 403.
  • the bottom opening 403 is an opening that is installed on the top surface of the base 5 so as to cover the light emitting device 1.
  • the reflective surface 401 is a reflective surface that reflects the light emitted by the light emitting device 1 toward the top opening 402.
  • the top opening 402 is an opening that emits the light reflected by the reflective surface 401.
  • the outer shape of the reflective surface 401 is circular, and it is installed so that the center of gravity of the light emitting surface 40 of the light emitting device 1 coincides with the center of the circle that is the outer shape of the reflective surface 401.
  • the light emitted from the center of the circle that is the outer shape of the reflective surface 401 is concentrated and efficiently emitted from the top opening 402.
  • the diameter of the outermost shape of the reflective surface 401 is 60 mm
  • the distance from the bottom opening 403 to the top opening 402 is 45 mm.
  • a collecting lens 7 as shown in FIG. 16 may be used as a collector other than the reflector 4, for example.
  • the collecting lens 7 is arranged so as to cover the upper part of the light emitting device 1, and has an entrance surface 7a on which the light emitted from the light emitting device 1 enters, a reflecting surface 7b that reflects the light that enters the lens, and an exit surface 7c that emits the light in the lens upward.
  • the lighting device 3 emits light with a luminous intensity L ⁇ (cd) in a direction at an angle ⁇ (°) with respect to an axis P that passes through the center of a circle that is the outline of the reflecting surface 401 in a planar view and extends parallel to the normal direction of the top surface of the base 5.
  • the luminous intensity L ⁇ is measured using a photometer (not shown) at a position equidistant from point O, which is the intersection of the axis P and the top surface of the base 5.
  • the distance between point O and the position where the luminous intensity is measured is a distance called the far field region, and is, for example, 1 m.
  • the lighting device using the light-emitting device 2 according to the comparative example differs from lighting device 3 in that light-emitting device 2 is used instead of light-emitting device 1.
  • the configurations and functions of the components other than the use of light-emitting device 2 instead of light-emitting device 1 are substantially the same as those of lighting device 3.
  • FIG. 17A is a front view of a light emitting device 2 according to a comparative example
  • FIG. 17B is a circuit diagram of the light emitting device 2 according to the comparative example.
  • the bonding wires 14 are omitted.
  • the light emitting device 2 according to the comparative example differs from the light emitting device 1 in that it has a first power wiring 291, a second power wiring 292, and a first power pad 281 instead of the first power wiring 91, the second power wiring 92, and the first power pad 81, and does not have a second power pad 82 or a third power pad 83.
  • the light emitting device 2 according to the comparative example also differs from the light emitting device 1 in that it does not have a second light emitting element 32, has the same number of first light emitting elements 31 as the number of first light emitting elements 31 and second light emitting elements 32 of the light emitting device 1, and the first light emitting elements 31 of the light emitting device 2 are connected in the same direction.
  • the configurations and functions of the components of the light emitting device 2 other than the first power wiring 291, the second power wiring 292, the first power pad 281, and the first light emitting element 31 are the same as the configurations and functions of the components of the light emitting device 1 with the same reference numerals, so detailed description will be omitted.
  • the light emitting device 2 has a pair of power terminals, a first power terminal 21 and a second power terminal 22.
  • the first power terminal 21 is connected to the first power pad 281 via a first power wiring 291
  • the second power terminal 22 is connected to the counter electrode pad 84 via a second power wiring 292.
  • a light emitting element row is arranged in which eight first light emitting elements 31 are connected in series via a bonding wire 14. Then, by connecting ten rows of the light emitting elements in parallel in the same direction, 80 first light emitting elements 31 are connected between the first power terminal 21 and the second power terminal 22.
  • Each light emitting element row has a first light emitting element 31 in the first row whose anode electrode is connected to the first power pad 281 via a bonding wire 14, and a first light emitting element 31 in the last row whose cathode electrode is connected to the counter electrode pad 84 via a bonding wire 14.
  • W1 and W2 shown in Figure 14A are curves showing the luminous intensity distribution when the same amount of power W is supplied to lighting device 3 using light-emitting device 1 and a lighting device using light-emitting device 2, respectively.
  • the value of W1 is greater than the value of W2, and the difference between the values of W1 and W2 is 0.03 or more.
  • the values of W1 and W2 are equal, and in the range of ⁇ -7 or 7 ⁇ , the value of W1 is smaller than the value of W2, and the difference between the values of W1 and W2 is -0.01 or more and 0.00 or less.
  • the lighting device 3 according to this embodiment can enhance illumination in a specific direction compared to a lighting device using a light-emitting device 2 supplied with the same amount of power W.
  • the horizontal and vertical axes of the characteristic diagram shown in FIG. 14B indicate the same values as those indicated by the horizontal and vertical axes of the characteristic diagram shown in FIG. 14A.
  • W1 in FIG. 14B is the same as W1 in FIG. 14A, and is a curve showing the luminous intensity distribution when power of power amount W is supplied to lighting device 3.
  • W3 is a curve showing the luminous intensity distribution when power of power amount Wa is supplied to a lighting device using light-emitting device 2.
  • the lighting device 3 supplies less power than a lighting device using a light-emitting device 2 set to the same luminous intensity in the front direction.
  • light-emitting device 1 Compared to light-emitting device 2, light-emitting device 1 according to this embodiment can efficiently increase illumination in a specific direction.
  • W2 shown in FIG. 14C is the same as W2 shown in FIG. 14A, and is a curve showing the luminous intensity distribution when power of power amount W is supplied to a lighting device using light-emitting device 2.
  • W4 is a curve showing the luminous intensity distribution when power of power amount Wb is supplied to lighting device 3.
  • the power amount Wb is lower than the power amount W, and is set so that when ⁇
  • the power amount Wb is 0.96 times the power amount W.
  • the lighting device 3 can strengthen the emission in a specific direction (e.g., in the range of ⁇
  • a specific direction e.g., in the range of ⁇
  • weaken the emission in directions other than the specific direction e.g., in the range of ⁇ >
  • FIG. 18 is a perspective view of a light-emitting device 1-6 according to a seventh embodiment of the present invention.
  • Light-emitting device 1-6 differs from light-emitting device 1 in that it has a substrate 610 and a plurality of light-emitting surfaces 640a-640d instead of substrate 10 and light-emitting surface 40.
  • the configurations and functions of the components of light-emitting device 2 other than substrate 610 and light-emitting surfaces 640a-640d are the same as those of light-emitting device 1, and therefore detailed description will be omitted.
  • the front shape of the substrate 610 is different from that of the substrate 10.
  • the configuration and functions other than the front shape are the same as those of the substrate 10.
  • the substrate 610 has a front shape of a square with each side measuring 40 mm.
  • Light emitting device 1-6 differs from light emitting device 1 in that it has multiple light exit surfaces. In this embodiment, it has four light exit surfaces 640a to 640d. The number of light exit surfaces may be two, three, or five or more.
  • Light exit surfaces 640a to 640d each have the same configuration and function as the components of light exit surface 40, and are arranged in isolation from each other.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • General Engineering & Computer Science (AREA)
  • Led Device Packages (AREA)
PCT/JP2024/001219 2023-01-26 2024-01-18 発光装置及びその発光装置を用いた照明装置 Ceased WO2024157865A1 (ja)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2024569041A JP7630751B2 (ja) 2023-01-26 2024-01-18 発光装置及びその発光装置を用いた照明装置
US19/147,885 US20260114107A1 (en) 2023-01-26 2024-01-18 Light-emitting device and lighting apparatus using the same
DE112024000669.8T DE112024000669T5 (de) 2023-01-26 2024-01-18 Lichtemittierende einrichtung und beleuchtungsvorrichtung mit dieser einrichtung
CN202480008913.XA CN120604650A (zh) 2023-01-26 2024-01-18 发光装置及使用该发光装置的照明装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2023010227 2023-01-26
JP2023-010227 2023-01-26

Publications (1)

Publication Number Publication Date
WO2024157865A1 true WO2024157865A1 (ja) 2024-08-02

Family

ID=91970531

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2024/001219 Ceased WO2024157865A1 (ja) 2023-01-26 2024-01-18 発光装置及びその発光装置を用いた照明装置

Country Status (5)

Country Link
US (1) US20260114107A1 (https=)
JP (1) JP7630751B2 (https=)
CN (1) CN120604650A (https=)
DE (1) DE112024000669T5 (https=)
WO (1) WO2024157865A1 (https=)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008270314A (ja) * 2007-04-17 2008-11-06 Toyoda Gosei Co Ltd 発光装置及び発光装置の製造方法
JP2011009298A (ja) * 2009-06-23 2011-01-13 Citizen Electronics Co Ltd 発光ダイオード光源装置
WO2011129203A1 (ja) * 2010-04-16 2011-10-20 日亜化学工業株式会社 発光装置
US20140091341A1 (en) * 2012-09-29 2014-04-03 Jiangsu Sun & Moon Lighting Co.,Ltd. Device and method for an led with a convex cover
JP2017034122A (ja) * 2015-08-03 2017-02-09 シチズン電子株式会社 発光装置
JP2017050080A (ja) * 2015-08-31 2017-03-09 パナソニックＩｐマネジメント株式会社 Ｌｅｄモジュール及びそれを備えた照明器具
WO2017209143A1 (ja) * 2016-05-31 2017-12-07 シチズン電子株式会社 発光装置およびその製造方法
JP2019220399A (ja) * 2018-06-21 2019-12-26 シャープ株式会社 照明装置および投光器

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102414851B (zh) * 2010-03-11 2016-06-22 松下知识产权经营株式会社 发光模块、光源装置、液晶显示装置和发光模块的制造方法
JP5811770B2 (ja) * 2011-10-28 2015-11-11 日亜化学工業株式会社 発光装置およびその製造方法

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008270314A (ja) * 2007-04-17 2008-11-06 Toyoda Gosei Co Ltd 発光装置及び発光装置の製造方法
JP2011009298A (ja) * 2009-06-23 2011-01-13 Citizen Electronics Co Ltd 発光ダイオード光源装置
WO2011129203A1 (ja) * 2010-04-16 2011-10-20 日亜化学工業株式会社 発光装置
US20140091341A1 (en) * 2012-09-29 2014-04-03 Jiangsu Sun & Moon Lighting Co.,Ltd. Device and method for an led with a convex cover
JP2017034122A (ja) * 2015-08-03 2017-02-09 シチズン電子株式会社 発光装置
JP2017050080A (ja) * 2015-08-31 2017-03-09 パナソニックＩｐマネジメント株式会社 Ｌｅｄモジュール及びそれを備えた照明器具
WO2017209143A1 (ja) * 2016-05-31 2017-12-07 シチズン電子株式会社 発光装置およびその製造方法
JP2019220399A (ja) * 2018-06-21 2019-12-26 シャープ株式会社 照明装置および投光器

Also Published As

Publication number Publication date
DE112024000669T5 (de) 2025-12-18
JP7630751B2 (ja) 2025-02-17
US20260114107A1 (en) 2026-04-23
JPWO2024157865A1 (https=) 2024-08-02
CN120604650A (zh) 2025-09-05

Similar Documents

Publication Publication Date Title
KR102246243B1 (ko) 발광소자, 발광장치 및 장치 베이스
KR101081069B1 (ko) 발광소자 및 그를 이용한 라이트 유닛
JP5197874B2 (ja) 発光モジュール、光源装置、液晶表示装置および発光モジュールの製造方法
KR101039881B1 (ko) 발광소자 및 그를 이용한 라이트 유닛
US20140197431A1 (en) Light emitting device
WO2013136389A1 (ja) 基板、発光装置及び照明装置
US8899789B2 (en) Lamp module
EP3022768B1 (en) Lighting device
JP6076796B2 (ja) 半導体発光装置
US10088133B2 (en) Mounting substrate, light-emitting apparatus, and illumination apparatus
JP2017034291A (ja) 発光装置
JP7630751B2 (ja) 発光装置及びその発光装置を用いた照明装置
US11879617B2 (en) Light emitting device and light source module
JP2017050344A (ja) 発光装置
CN203948978U (zh) 发光装置
US20210272939A1 (en) Light emitting device and method of manufacturing the light emitting device
JP5216948B1 (ja) 基板、発光装置及び照明装置
JP2017050343A (ja) 発光装置
JP7725761B1 (ja) 照明装置および発光装置
TWM519254U (zh) 背光模組
JP2017050104A (ja) 発光装置
JP2024113533A (ja) 発光装置
WO2025039234A1 (zh) 一种发光装置及显示装置
KR101694178B1 (ko) 발광 소자
CN117832359A (zh) 一种发光装置及显示装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 24746613

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 2024569041

Country of ref document: JP

WWE Wipo information: entry into national phase

Ref document number: 202480008913.X

Country of ref document: CN

WWE Wipo information: entry into national phase

Ref document number: 112024000669

Country of ref document: DE

WWP Wipo information: published in national office

Ref document number: 202480008913.X

Country of ref document: CN

WWP Wipo information: published in national office

Ref document number: 112024000669

Country of ref document: DE

122 Ep: pct application non-entry in european phase

Ref document number: 24746613

Country of ref document: EP

Kind code of ref document: A1