# US 12,016,189 B2 · Light-emitting device, display device, and electronic device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,016,189 B2 - Document ID: US12016189B2 - Status: Granted - Kind: B2 - Application number: 15/734,633 - Filed: 2019-05-31 - Published: 2021-07-29 - Granted: 2024-06-18 - Earliest claimed: 2018-06-06 - Assignees: Semiconductor Energy Laboratory Co., Ltd. - Applicants: Semiconductor Energy Laboratory Co., Ltd. - Inventors: Satoshi Seo; Shunpei Yamazaki - Web page: https://patentgrep.com/patent/US12016189B2 ## CPC - H10K 50/115: comprising active inorganic nanostructures, e.g. luminescent quantum dots - H10K 50/854: comprising scattering means - H10K 59/121: characterised by the geometry or disposition of pixel elements - H10K 59/38: comprising colour filters or colour changing media [CCM] - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES ## Abstract A novel light-emitting device is provided. A light-emitting device or a display device having high display quality is provided. An electronic device including a display portion with high display quality is provided. Provided is a light-emitting device including a first pixel which includes a first light-emitting element and a light-scattering layer; and a second pixel which includes a second light-emitting element and a first color conversion layer, in which an emission center substance in each of the first light-emitting element and the second light-emitting element is an organic compound, the light-scattering layer includes a first substance that scatters light emitted from the first light-emitting element, the first color conversion layer includes a second substance that emits light by absorbing light emitted from the second light-emitting element, and the first light-emitting element and the second light-emitting element have a microcavity structure. ## Claims ### Claim 1 A light-emitting device comprising: a first pixel comprising a first light-emitting element and a light-scattering layer; and a second pixel comprising a second light-emitting element and a first color conversion layer, wherein an emission center substance in each of the first light-emitting element and the second light-emitting element is an organic compound, wherein the light-scattering layer comprises a first substance that scatters light emitted from the first light-emitting element, wherein the first color conversion layer comprises a second substance that emits light by absorbing light emitted from the second light-emitting element, wherein the first light-emitting element and the second light-emitting element have a microcavity structure, wherein light emitted from the first pixel has a first color, wherein light emitted from the second pixel has a second color, wherein a third color is different from the first color and the second color, wherein light with the first color is extracted from the first pixel via the light-scattering layer, and wherein light with the third color is extracted from the second pixel without going through the light-scattering layer. ### Claim 2 (depends on 1) The light-emitting device according to claim 1, wherein a peak wavelength of light emitted from the emission center substance is 420 nm to 480 nm. ### Claim 3 (depends on 1) The light-emitting device according to claim 1 wherein the emission center substance is a common substance in the first light-emitting element and the second light-emitting element. ### Claim 4 (depends on 1) The light-emitting device according to claim 1 wherein the first light-emitting element and the second light-emitting element have the same structure. ### Claim 5 (depends on 1) The light-emitting device according to claim 1 wherein the first substance is a microparticle of titanium oxide. ### Claim 6 (depends on 1) The light-emitting device according to claim 1, wherein the second substance is a quantum dot. ### Claim 7 (depends on 1) The light-emitting device according to claim 1, wherein the first color is blue, and wherein the third color is green or red. ### Claim 8 (depends on 1) The light-emitting device according to claim 1, further comprising: a third pixel, wherein the third pixel comprises a third light-emitting element and a second color conversion layer, wherein the second color conversion layer comprises a third substance that emits light by absorbing light emitted from the third light-emitting element, and wherein the third light-emitting element has a microcavity structure. ### Claim 9 (depends on 8) The light-emitting device according to claim 8, wherein the third substance is a quantum dot. ### Claim 10 (depends on 8) The light-emitting device according to claim 8, wherein the emission center substance is a common substance in the first light-emitting element, the second light-emitting element, and the third light-emitting element. ### Claim 11 (depends on 8) The light-emitting device according to claim 8, wherein each of the first pixel, the second pixel and the third pixel exhibits light with a different wavelength from each other. ### Claim 12 (depends on 1) The light-emitting device according to claim 1, wherein the light-scattering layer also serves as a blue color filter. ### Claim 13 (depends on 1) The light-emitting device according to claim 1, wherein the first pixel further comprises a color filter. ### Claim 14 (depends on 1) An electronic device comprising: the light-emitting device according to claim 1; and one of a sensor, an operation button, a speaker and a microphone. ### Claim 15 (depends on 1) A display device comprising the light-emitting device according to claim 1. ### Claim 16 A light-emitting device comprising: a first pixel comprising a first light-emitting element; and a second pixel comprising a second light-emitting element and a first color conversion layer, wherein an emission center substance in each of the first light-emitting element and the second light-emitting element is an organic compound, wherein the first color conversion layer comprises a substance that emits light by absorbing light emitted from the second light-emitting element, wherein each of the first light-emitting element and the second light-emitting element has a semi-transmissive and semi-reflective electrode, wherein the first color conversion layer is interposed between the semi-transmissive and semi-reflective electrode and a semi-transmissive and semi-reflective layer, wherein light emitted from the first light-emitting element has a first color, wherein the first color conversion layer comprises a quantum-dot material, wherein light with the first color is extracted from the first pixel, wherein light with a second color is extracted from the second pixel, and wherein the second color is different from the first color. ### Claim 17 (depends on 16) The light-emitting device according to claim 16, wherein the semi-transmissive and semi-reflective layer has a reflectivity higher than or equal to 20% and lower than or equal to 80% with respect to light emitted from the first color conversion layer. ### Claim 18 (depends on 16) The light-emitting device according to claim 16, further comprising a third pixel, wherein the third pixel comprises a third light-emitting element and a second color conversion layer, wherein λ is a peak wavelength of light emitted from the first color conversion layer, and wherein the optical distance of a portion interposed between the semi-transmissive and semi-reflective electrode and the semi-transmissive and semi-reflective layer is the integral multiple of λ/4.