# US 12,191,291 B2 · Display device and manufacturing method thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,191,291 B2 - Document ID: US12191291B2 - Status: Granted - Kind: B2 - Application number: 17/223,721 - Filed: 2021-04-06 - Published: 2021-10-21 - Granted: 2025-01-07 - Earliest claimed: 2020-04-20 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., Ltd. - Inventors: Kwang Soo Bae; Beom Soo Park; Min Jeong Oh; Hae Ju Yun - Web page: https://patentgrep.com/patent/US12191291B2 ## CPC - H10W 90/00: Package configurations - H10H 20/853: characterised by their shape - H10H 20/0361: {of wavelength conversion means} - H10H 20/0362: {of encapsulations} - H10H 20/0364: {of interconnections} - H10H 20/8512: {Wavelength conversion materials} - H10H 20/8515: {not being in contact with the bodies} - H10H 20/856: Reflecting means - 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 display device and a manufacturing method thereof are provided. The display device includes a display substrate, sub-pixels on the display substrate, each of the sub-pixels including a first electrode and a second electrode on the display substrate and spaced apart from each other, light emitting elements between the first electrode and the second electrode, an insulating layer covering the light emitting elements, a protective pattern on the insulating layer and overlapping one of the light emitting elements, and a bank on the insulating layer at a boundary of one of the sub-pixels. ## Claims ### Claim 1 A display device comprising: a display substrate; sub-pixels on the display substrate, each of the sub-pixels comprising: a first electrode and a second electrode on the display substrate and spaced apart from each other; light emitting elements between the first electrode and the second electrode; an insulating layer covering the light emitting elements; a protective pattern on the insulating layer and overlapping an entirety of one of the light emitting elements; and a bank on the insulating layer at a boundary of one of the sub-pixels. ### Claim 2 (depends on 1) The display device of claim 1, wherein the protective pattern covers upper and side surfaces of the one of the light emitting elements. ### Claim 3 (depends on 1) The display device of claim 1, wherein the protective pattern and the bank are directly on the insulating layer. ### Claim 4 (depends on 1) The display device of claim 1, wherein the protective pattern and the bank comprise a same material. ### Claim 5 (depends on 4) The display device of claim 4, wherein the protective pattern and the bank comprise an organic insulating material. ### Claim 6 (depends on 1) The display device of claim 1, wherein a distance between respective ends of the protective pattern is less than a distance between one end of the protective pattern and one end of the bank. ### Claim 7 (depends on 6) The display device of claim 6, wherein a thickness of the protective pattern is less than a thickness of the bank. ### Claim 8 (depends on 1) The display device of claim 1, wherein the sub-pixels comprise a first sub-pixel, a second sub-pixel, and a third sub-pixel, and wherein the bank is at boundaries of the first sub-pixel, the second sub-pixel, and the third sub-pixel. ### Claim 9 (depends on 8) The display device of claim 8, wherein the light emitting elements comprise: first light emitting elements in the first sub-pixel; second light emitting elements in the second sub-pixel; and third light emitting elements in the third sub-pixel, and wherein the first to third light emitting elements emit light of a same color. ### Claim 10 (depends on 8) The display device of claim 8, further comprising: a first wavelength converting layer in the first sub-pixel; a second wavelength converting layer in the second sub-pixel; and a light transmitting layer in the third sub-pixel. ### Claim 11 (depends on 1) The display device of claim 1, further comprising a color control layer on the insulating layer. ### Claim 12 (depends on 11) The display device of claim 11, wherein the color control layer comprises a base resin, and quantum dots dispersed in the base resin. ### Claim 13 (depends on 11) The display device of claim 11, further comprising a reflective layer on a surface of the bank. ### Claim 14 (depends on 11) The display device of claim 11, wherein a refractive index of the protective pattern is smaller than a refractive index of the color control layer. ### Claim 15 (depends on 11) The display device of claim 11, further comprising: a color filter substrate on the display substrate; a color filter on a surface of the color filter substrate; and a filling layer between the color filter and the color control layer. ### Claim 16 (depends on 11) The display device of claim 11, further comprising a capping layer on the color control layer. ### Claim 17 (depends on 16) The display device of claim 16, further comprising a color filter directly on the capping layer. ### Claim 18 A display device comprising: a display substrate; sub-pixels on the display substrate, each of the sub-pixels comprising: a first electrode and a second electrode on the display substrate and spaced apart from each other; light emitting elements between the first electrode and the second electrode; an insulating layer covering the light emitting elements; a protective pattern on the insulating layer and overlapping one of the light emitting elements; and a bank on the insulating layer at a boundary of one of the sub-pixels; and a color control layer on the insulating layer, and directly covering the protective pattern. ### Claim 19 (depends on 18) The display device of claim 18, wherein the color control layer covers ends of the one of the light emitting elements. ### Claim 20 A display device comprising: a display substrate; sub-pixels on the display substrate, each of the sub-pixels comprising: a first electrode and a second electrode on the display substrate and spaced apart from each other; light emitting elements between the first electrode and the second electrode; an insulating layer covering the light emitting elements; a protective pattern on the insulating layer and overlapping one of the light emitting elements; and a bank on the insulating layer at a boundary of one of the sub-pixels; and a color control layer on the insulating layer, wherein a refractive index of the protective pattern is smaller than a refractive index of the color control layer.