# US 11,444,223 B2 · Light emitting device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,444,223 B2 - Document ID: US11444223B2 - Status: Granted - Kind: B2 - Application number: 16/565,832 - Filed: 2019-09-10 - Published: 2020-03-12 - Granted: 2022-09-13 - Earliest claimed: 2018-09-12 - Assignees: Seoul Semiconductor Co., Ltd. - Applicants: Seoul Semiconductor Co., Ltd. - Inventors: Bo Yong Han - Web page: https://patentgrep.com/patent/US11444223B2 ## CPC - H10H 20/8513: {having two or more wavelength conversion materials} - H05B 45/10: Controlling the intensity of the light - H10W 90/00: Package configurations - F21K 9/00: Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers - F21Y 2103/10: comprising a linear array of point-like light-generating elements - F21Y 2105/16: square or rectangular, e.g. for light panels - F21Y 2113/13: comprising an assembly of point-like light sources - F21Y 2115/10: Light-emitting diodes [LED] - H05B 45/20: Controlling the colour of the light - H10H: INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS - H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL - H10W: GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10 - 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 - 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 ## Abstract A light emitting device including at least one first light emitting unit including an ultraviolet or violet light emitting diode chip and a first wavelength converter, at least one second light emitting unit including an ultraviolet or violet light emitting diode chip and a second wavelength converter, and at least one third light emitting unit including an ultraviolet or violet light emitting diode chip and a third wavelength converter, in which color coordinates of the first light emitting unit, the second light emitting unit, and the third light emitting unit define a triangular region in a CIE-1931 coordinate system, the triangular region including at least a portion of the Plankian locus, and a maximum color temperature of the Plankian locus included in the triangular region is 5000K or higher, and a minimum color temperature of the Plankian locus included in the triangular region is 3000K or lower. ## Claims ### Claim 1 A light emitting device, comprising: at least one first light emitting unit including a light emitting diode chip and a first wavelength converter; at least one second light emitting unit including a light emitting diode chip and a second wavelength converter; and at least one third light emitting unit including a light emitting diode chip and a third wavelength converter, wherein, in a blue region of a spectrum of the light emitting device, the intensity of light emitted from at least one of the first, second, and third wavelength converters is configured to be greater than that of the corresponding light emitting diode chip, wherein color coordinates of the first light emitting unit, the second light emitting unit, and the third light emitting unit define a triangular region in a CIE-1931 coordinate system, the triangular region including at least a portion of the Plankian locus, wherein a maximum color temperature of the Plankian locus included in the triangular region is 5000K or higher, and a minimum color temperature of the Plankian locus included in the triangular region is 3000K or lower, wherein color temperatures of the Plankian locus between the maximum and minimum color temperatures are all included in the triangular region, wherein a color coordinate of the first light emitting unit is closer to a color temperature 5000K than those of the second and third light emitting units, and wherein a color coordinate of the third light emitting unit is closer to a color temperature 3000K than those of the first and second light emitting units. ### Claim 2 (depends on 1) The light emitting device of claim 1, wherein the maximum color temperature is 6000K or higher, and the minimum color temperature is 2700K or lower. ### Claim 3 (depends on 2) The light emitting device of claim 2, wherein the maximum color temperature is 6500K or higher. ### Claim 4 (depends on 3) The light emitting device of claim 3, wherein the maximum color temperature is 10000K or higher, and the minimum color temperature is 1800K or lower. ### Claim 5 (depends on 1) The light emitting device of claim 1, wherein a color coordinate of the second light emitting unit is located above the Plankian locus on the CIE-1931 coordinate system. ### Claim 6 (depends on 1) The light emitting device of claim 1, wherein the first, second, and third light emitting units are configured to be operated by dimming to continuously realize color temperatures on the Plankian locus included in the triangular region. ### Claim 7 (depends on 1) The light emitting device of claim 1, wherein each of the at least one first light emitting unit, the at least one second light emitting unit, and the at least one third light emitting unit is provided in plural. ### Claim 8 (depends on 7) The light emitting device of claim 7, further comprising a base, wherein the first light emitting units, the second light emitting units, and the third light emitting units are regularly disposed on the base. ### Claim 9 (depends on 8) The light emitting device of claim 8, wherein the first light emitting units, the second light emitting units, and the third light emitting units are disposed in one row or in a matrix. ### Claim 10 (depends on 8) The light emitting device of claim 8, wherein the first light emitting unit, the second light emitting unit, and the third light emitting unit define a single group, and are disposed to form a triangular shape. ### Claim 11 (depends on 10) The light emitting device of claim 10, wherein the first, second, and third light emitting units of an adjacent group has an inverted triangular shape. ### Claim 12 (depends on 11) The light emitting device of claim 11, wherein a distance between adjacent first light emitting units, a distance between adjacent second light emitting units, and a distance between adjacent third light emitting units are the same. ### Claim 13 (depends on 1) The light emitting device of claim 1, further comprising at least one fourth light emitting unit including an ultraviolet or violet light emitting diode chip and a fourth wavelength converter, wherein a color coordinate of the fourth light emitting unit is disposed near the color coordinate of the third light emitting unit. ### Claim 14 (depends on 13) The light emitting device of claim 13, wherein: the color coordinate of the third light emitting unit is located above the Plankian locus on the CIE-1931 coordinate system; and the color coordinate of the fourth light emitting unit is located below the Plankian locus on the CIE-1931 coordinate system. ### Claim 15 A lighting apparatus comprising a light emitting device, comprising: at least one first light emitting unit including a light emitting diode chip and a first wavelength converter; at least one second light emitting unit including a light emitting diode chip and a second wavelength converter; and at least one third light emitting unit including a light emitting diode chip and a third wavelength converter, wherein, in a blue region of a spectrum of the light emitting device, the intensity of light emitted from at least one of the first, second, and third wavelength converters is configured to be greater than that of the corresponding light emitting diode chip, wherein color coordinates of the first light emitting unit, the second light emitting unit, and the third light emitting unit define a triangular region in a CIE-1931 coordinate system, the triangular region including at least a portion of the Plankian locus, wherein a maximum color temperature of the Plankian locus included in the triangular region is 5000K or higher, and a minimum color temperature of the Plankian locus included in the triangular region is 3000K or lower, wherein color temperatures of the Plankian locus between the maximum and minimum color temperatures are all included in the triangular region, wherein a color coordinate of the first light emitting unit is closer to a color temperature 5000K than those of the second and third light emitting units, and wherein a color coordinate of the third light emitting unit is closer to a color temperature 3000K than those of the first and second light emitting units. ### Claim 16 (depends on 15) The lighting apparatus of claim 15, wherein the maximum color temperature is 6500K or higher, and the minimum color temperature is 2700K or lower. ### Claim 17 (depends on 15) The lighting apparatus of claim 15, further comprising a base, wherein the first, second, and third light emitting units are regularly disposed on the base. ### Claim 18 (depends on 15) The lighting apparatus of claim 15, wherein the first to third light emitting units are configured to be operated by dimming. ### Claim 19 (depends on 15) The lighting apparatus of claim 15, further comprising at least one fourth light emitting unit including an ultraviolet or violet light emitting diode chip and a fourth wavelength converter, wherein a color coordinate of the fourth light emitting unit is located near the color coordinate of the third light emitting unit. ### Claim 20 (depends on 19) The lighting apparatus of claim 19, wherein: the color coordinate of the third light emitting unit is located above the Plankian locus on the CIE-1931 coordinate system; and the color coordinate of the fourth light emitting unit is located below the Plankian locus on the CIE-1931 coordinate system.