# US 12,183,860 B2 · Full-color light emitting device and display module > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,183,860 B2 - Document ID: US12183860B2 - Status: Granted - Kind: B2 - Application number: 17/623,268 - Filed: 2020-04-21 - Published: 2022-11-24 - Granted: 2024-12-31 - Earliest claimed: 2019-06-28 - Assignees: Foshan Nationstar Optoelectronics Co., Ltd. - Applicants: Foshan Nationstar Optoelectronics Co., Ltd. - Inventors: Yunyuan Zhang; Jinhui Zhang; Yikai Yuan; Cheng Li - Web page: https://patentgrep.com/patent/US12183860B2 ## CPC - H10H 20/8513: {having two or more wavelength conversion materials} - H10H 20/856: Reflecting means - H10W 90/00: Package configurations - H10H 20/84: Coatings, e.g. passivation layers or antireflective coatings - H10H 20/8512: {Wavelength conversion materials} - H10H 20/855: Optical field-shaping means, e.g. lenses - H10H: INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS - H10W: GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10 ## Abstract The disclosure provides a full-color light emitting device and a display module. A light emitting layer, a refractive layer, a spacer layer and a light processing layer are included. The refractive layer is disposed above the light emitting layer, the spacer layer is disposed above the refractive layer, and the light processing layer is disposed above the spacer layer. The light emitting layer includes a first light emitting part, a second light emitting part and a third light emitting part. The light processing layer includes a first light processing part, a second light processing part, and a third light processing part, and a baffle wall is disposed between any two adjacent light processing parts in the first light processing part, the second light processing part and the third light processing part. A light refractive index of the refractive layer is greater than a light refractive index of the spacer layer. ## Claims ### Claim 1 A full-color light emitting device, wherein the full-color light emitting device comprises a light emitting layer, a refractive layer, a spacer layer and a light processing layer, the refractive layer being disposed above the light emitting layer, the spacer layer being disposed above the refractive layer, and the light processing layer being disposed above the spacer layer, the light emitting layer comprising a first light emitting part, a second light emitting part and a third light emitting part, the light processing layer comprising a first light processing part emitting a blue light ray, a second light processing part emitting a green light ray and a third light processing part emitting a red light ray, and a baffle wall being disposed between any two adjacent light processing parts in the first light processing part, the second light processing part and the third light processing part, the first light processing part being disposed at a position corresponding to the first light emitting part, the second light processing part being disposed at a position corresponding to the second light emitting part, and the third light processing part being disposed at a position corresponding to the third light emitting part, a light refractive index of the refractive layer being greater than a light refractive index of the spacer layer; the baffle wall extends toward a side where the light emitting layer is located and into the spacer layer, and a contact surface between the first light processing part and the spacer layer is convex. ### Claim 2 (depends on 1) The full-color light emitting device as claimed in claim 1, wherein the spacer layer is a vacuum layer, or the spacer layer is filled with colorless gas, or the spacer layer is filled with a material with a refractive index lower than the refractive index of the refractive layer. ### Claim 3 (depends on 1) The full-color light emitting device as claimed in claim 1, wherein the refractive layer comprises at least two sub-refractive layers, refractive indexes of any two adjacent sub-refractive layers in the at least two sub-refractive layers being different, and a light refractive index of an uppermost sub-refractive layer in the at least two sub-refractive layers being greater than the light refractive index of the spacer layer. ### Claim 4 (depends on 1) The full-color light emitting device as claimed in claim 1, wherein a light absorption material is disposed between any two adjacent light emitting parts in the first light emitting part, the second light emitting part and the third light emitting part. ### Claim 5 (depends on 1) The full-color light emitting device as claimed in claim 1, wherein the baffle wall extends towards a side where the light emitting layer is located and passes through the spacer layer, the spacer layer being divided into a plurality of spacer parts by the baffle wall, or the baffle wall extends toward a side where the light emitting layer is located, passes through the spacer layer and extends into the refractive layer. ### Claim 6 (depends on 1) The full-color light emitting device as claimed in claim 1, wherein the light emitting layer further comprises a substrate, the first light emitting part comprising at least one light emitting chip, and/or the second light emitting part comprising at least one light emitting chip, and/or the third light emitting part comprising at least one light emitting chip, and the light emitting chip being disposed on the substrate. ### Claim 7 (depends on 1) The full-color light emitting device as claimed in claim 1, wherein an emission peak wavelength of any light emitting part of the light emitting layer is in a range of [350 nm, 480 nm], a component material of the third light processing part comprising a red light conversion material, the red light conversion material being a fluorescent material or quantum dot material with an emission peak wavelength in a range of [600 nm, 700 nm], a component material of the second light processing part comprising a green light conversion material, the green light conversion material being a fluorescent material or quantum dot material with an emission peak wavelength in a range of [500 nm, 550 nm], the first light processing part being composed of a colorless transparent material when an emission peak wavelength of the first light emitting part is in a range of [430 nm, 480 nm], or, a component material of the first light processing part comprising a blue light conversion material when an emission peak wavelength of the first light emitting part is in a range of [350 nm, 430 nm], and the blue light conversion material being a fluorescent material or quantum dot material with an emission peak wavelength in a range of [430 nm, 480 nm]. ### Claim 8 (depends on 1) The full-color light emitting device as claimed in claim 1, wherein the baffle wall is made of a light absorption material and/or a light reflecting material, or a component material of the baffle wall comprising a light absorption material and/or a light reflecting material, or a light adsorption material and/or a light reflecting material being disposed on a surface of the baffle wall. ### Claim 9 (depends on 1) The full-color light emitting device as claimed in claim 1, wherein the full-color light emitting device further comprises an isolation layer surrounding the light emitting layer, the refractive layer, the spacer layer and the light processing layer. ### Claim 10 (depends on 9) The full-color light emitting device as claimed in claim 9, wherein the isolation layer is made of a light absorption material and/or a light reflecting material, or a component material of the isolation layer comprising a light absorption material and/or a light reflecting material, or a light adsorption material and/or a light reflecting material being disposed on a surface of the isolation layer. ### Claim 11 (depends on 1) The full-color light emitting device as claimed in claim 1, wherein under a condition that the refractive layer being closely disposed above the light emitting layer, the spacer layer being closely disposed above the refractive layer, the light processing layer being closely disposed above the spacer layer, and the light emitting part and the corresponding light processing part being coaxially disposed, wherein a refractive index n1 of the refractive layer and a refractive index n2 of the spacer layer meet a following constraint condition: n 1 n 2 ≥ ( d 1 - d 3 ) 2 + 4 ⁢ d 2 2 d 1 - d 3 , Wherein d3 is a wire diameter of the light emitting part, d1 is a wire diameter of the light processing part, and d2 is a thickness of the refractive layer. ### Claim 12 (depends on 1) A display module, wherein the display module comprises a plurality of full-color light emitting devices as claimed in claim 1. ### Claim 13 (depends on 12) The display module as claimed in claim 12, wherein the spacer layer is a vacuum layer, or the spacer layer is filled with colorless gas, or the spacer layer is filled with a material with a refractive index lower than the refractive index of the refractive layer. ### Claim 14 (depends on 12) The display module as claimed in claim 12, wherein the refractive layer comprises at least two sub-refractive layers, refractive indexes of any two adjacent sub-refractive layers in the at least two sub-refractive layers being different, and a light refractive index of an uppermost sub-refractive layer in the at least two sub-refractive layers being greater than the light refractive index of the spacer layer. ### Claim 15 (depends on 12) The display module as claimed in claim 12, wherein a light absorption material is disposed between any two adjacent light emitting parts in the first light emitting part, the second light emitting part and the third light emitting part. ### Claim 16 (depends on 12) The display module as claimed in claim 12, wherein the baffle wall extends towards a side where the light emitting layer is located and passes through the spacer layer, the spacer layer being divided into a plurality of spacer parts by the baffle wall, or the baffle wall extends toward a side where the light emitting layer is located, passes through the spacer layer and extends into the refractive layer. ### Claim 17 (depends on 12) The display module as claimed in claim 12, wherein the light emitting layer further comprises a substrate, the first light emitting part comprising at least one light emitting chip, and/or the second light emitting part comprising at least one light emitting chip, and/or the third light emitting part comprising at least one light emitting chip, and the light emitting chip being disposed on the substrate. ### Claim 18 (depends on 12) The display module as claimed in claim 12, wherein an emission peak wavelength of any light emitting part of the light emitting layer is in a range of [350 nm, 480 nm], a component material of the third light processing part comprising a red light conversion material, the red light conversion material being a fluorescent material or quantum dot material with an emission peak wavelength in a range of [600 nm, 700 nm], a component material of the second light processing part comprising a green light conversion material, the green light conversion material being a fluorescent material or quantum dot material with an emission peak wavelength in a range of [500 nm, 550 nm], the first light processing part being composed of a colorless transparent material when an emission peak wavelength of the first light emitting part is in a range of [430 nm, 480 nm], or, a component material of the first light processing part comprising a blue light conversion material when an emission peak wavelength of the first light emitting part is in a range of [350 nm, 430 nm], and the blue light conversion material being a fluorescent material or quantum dot material with an emission peak wavelength in a range of [430 nm, 480 nm]. ### Claim 19 (depends on 12) The display module as claimed in claim 12, wherein the full-color light emitting device further comprises an isolation layer surrounding the light emitting layer, the refractive layer, the spacer layer and the light processing layer. ### Claim 20 (depends on 12) The display module as claimed in claim 12, wherein under a condition that the refractive layer being closely disposed above the light emitting layer, the spacer layer being closely disposed above the refractive layer, the light processing layer being closely disposed above the spacer layer, and the light emitting part and the corresponding light processing part being coaxially disposed, wherein a refractive index n1 of the refractive layer and a refractive index n2 of the spacer layer meet a following constraint condition: n 1 n 2 ≥ ( d 1 - d 3 ) 2 + 4 ⁢ d 2 2 d 1 - d 3 , Wherein d3 is a wire diameter of the light emitting part, d1 is a wire diameter of the light processing part, and d2 is a thickness of the refractive layer.