# US 11,114,419 B2 · Multi-color LED pixel unit and micro-LED display panel > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,114,419 B2 - Document ID: US11114419B2 - Status: Granted - Kind: B2 - Application number: 16/567,103 - Filed: 2019-09-11 - Published: 2021-03-11 - Granted: 2021-09-07 - Earliest claimed: 2019-09-11 - Assignees: Jade Bird Display (Shanghai) Limited - Applicants: Jade Bird Display (Shanghai) Limited - Inventors: Qiming Li; Qunchao Xu - Web page: https://patentgrep.com/patent/US11114419B2 ## CPC - H10W 90/00: Package configurations - H10H 20/817: characterised by the crystal structures or orientations, e.g. polycrystalline, amorphous or porous - H10H 20/818: within the light-emitting regions - H10H 20/831: characterised by their shape - H10H 20/857: Interconnections, e.g. lead-frames, bond wires or solder balls - H10H 29/14: comprising multiple light-emitting semiconductor components - H10H 29/142: {Two-dimensional arrangements, e.g. asymmetric LED layout} - H10W: GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10 - H10H: INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS ## Abstract A multi-color light emitting pixel unit includes a substrate, a bottom conductive layer formed on the substrate and a top conductive layer formed over the bottom conductive layer, and a light emitting layer formed between the top conductive layer and the bottom conductive layer. The light emitting layer includes a plurality of micro-gap structures. ## Claims ### Claim 1 A multi-color light emitting pixel unit, comprising: a substrate; a bottom conductive layer formed on the substrate and a top conductive layer formed over the bottom conductive layer; and a light emitting layer formed between the top conductive layer and the bottom conductive layer, wherein the light emitting layer includes a plurality of micro-gap structures, and each one of the micro-gap structures is an air gap. ### Claim 2 (depends on 1) The multi-color light emitting pixel unit of claim 1, wherein each one of the micro-gap structures extends along a direction perpendicular to the substrate and penetrates the light emitting layer. ### Claim 3 (depends on 1) The multi-color light emitting pixel unit of claim 1, wherein a cross-sectional dimension of each one of the air gaps is not more than 2 nm. ### Claim 4 (depends on 1) The multi-color light emitting pixel unit of claim 1, wherein each one of the micro-gap structures is sealed between the top conductive layer and the bottom conductive layer. ### Claim 5 (depends on 1) The multi-color light emitting pixel unit of claim 1, wherein the light emitting layer is a first light emitting layer, the multi-color light emitting pixel unit further including: a second light emitting layer formed between the first light emitting layer and the bottom conductive layer. ### Claim 6 (depends on 5) The multi-color light emitting pixel unit of claim 5, wherein the plurality of micro-gap structures included in the first light emitting layer are a first plurality of micro-gap structures, the second light emitting layer including a second plurality of micro-gap structures. ### Claim 7 (depends on 6) The multi-color light emitting pixel unit of claim 6, wherein the first plurality of micro-gap structures are not vertically aligned with the second plurality of micro-gap structures. ### Claim 8 (depends on 6) The multi-color light emitting pixel unit of claim 6, further comprising: a metal layer formed between the first light emitting layer and the second light emitting layer, and a top isolation layer formed between the first light emitting layer and the top conductive layer. ### Claim 9 (depends on 8) The multi-color light emitting pixel unit of claim 8, wherein the first plurality of micro-gap structures are sealed between the top isolation layer and the metal layer, and the second plurality of micro-gap structures are sealed between the metal layer and the bottom conductive layer. ### Claim 10 (depends on 5) The multi-color light emitting pixel unit of claim 5, wherein the multi-color light emitting pixel unit further includes: a third light emitting layer formed between the second light emitting layer and the bottom conductive layer. ### Claim 11 (depends on 10) The multi-color light emitting pixel unit of claim 10, wherein the plurality of micro-gap structures included in the first light emitting layer are a first plurality of micro-gap structures and at least one of the second light emitting layer and the third light emitting layer includes a plurality of second micro-gap structures. ### Claim 12 (depends on 10) The multi-color light emitting pixel unit of claim 10, wherein the plurality of micro-gap structures included in the first light emitting layer are a first plurality of micro-gap structures, the second light emitting layer including a second plurality of micro-gap structures, and the third light emitting layer including a third plurality of micro-gap structures. ### Claim 13 (depends on 12) The multi-color light emitting pixel unit of claim 12, wherein the first plurality of micro-gap structures are not vertically aligned with the second plurality of micro-gap structures, and the second plurality of micro-gap structures are not vertically aligned with the third plurality of micro-gap structures. ### Claim 14 (depends on 12) The multi-color light emitting pixel unit of claim 12, further comprising: a first metal layer formed between the first light emitting layer and the second light emitting layer; a second metal layer formed between the second light emitting layer and the third light emitting layer; and a top isolation layer formed between the first light emitting layer and the top conductive layer. ### Claim 15 (depends on 14) The multi-color light emitting pixel unit of claim 14, wherein the first plurality of micro-gap structures are sealed between the top isolation layer and the first metal layer, the second plurality of micro-gap structures are sealed between the first metal layer and the second metal layer, and the third plurality of micro-gap structures are sealed between the second metal layer and the bottom conductive layer. ### Claim 16 (depends on 1) A micro display panel comprising the multi-color light emitting pixel unit of claim 1.