# US 2026/0101656 A1 · Display Device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2026/0101656 A1 - Document ID: US20260101656A1 - Status: Published application - Kind: A1 - Application number: 19/272,298 - Filed: 2025-07-17 - Published: 2026-04-09 - Earliest claimed: 2024-10-04 - Assignees: LG Display Co., Ltd. - Applicants: LG Display Co., Ltd. - Inventors: Hoonsok Son; Minki Kim - Web page: https://patentgrep.com/patent/US20260101656A1 ## CPC - H10K 59/38: comprising colour filters or colour changing media [CCM] - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES ## Abstract A display device includes a first substrate including a plurality of sub-pixels; each first electrode disposed on each of the plurality of sub-pixels; a light-emitting layer disposed on the first electrodes a second electrode disposed on the light-emitting layer, and a color conversion structure disposed over the plurality of sub-pixels, wherein the color conversion structure has different thicknesses in each of the sub-pixels. ## Claims ### Claim 1 A display device comprising: a first substrate including a plurality of sub-pixels; a plurality of first electrodes, each of the plurality of first electrodes on a corresponding sub-pixel from the plurality of sub-pixels; a light-emitting layer on the plurality of first electrodes; a second electrode on the light-emitting layer, and a color conversion structure over the plurality of sub-pixels, the color conversion structure having different thicknesses in each of the plurality of sub-pixels. ### Claim 2 (depends on 1) The display device of claim 1, wherein the plurality of sub-pixels comprises: a first sub-pixel emitting light of a first color; a second sub-pixel emitting light of a second color that is different from the first color; and a third sub-pixel emitting light of a third color that is different from both the first color and the second color. ### Claim 3 (depends on 2) The display device of claim 2, wherein the color conversion structure includes: a first layer spaced apart from the second electrode; a second layer on the first layer; and a third layer on the second layer, wherein the second layer includes: a first area that spaces apart the first layer and the third layer by a first distance; a second area that spaces apart the first layer and the third layer apart by a second distance that is different from the first distance; and a third area that spaces apart the first layer and the third layer by a third distance that is different from both the first distance and the second distance. ### Claim 4 (depends on 3) The display device of claim 3, wherein the display device further comprises: a planarization film on the third layer of the color conversion structure; and a second substrate on the planarization film such that the planarization film and second substrate are in contact with each other. ### Claim 5 (depends on 3) The display device of claim 3, wherein the first area of the second layer overlaps the first sub-pixel, the second area of the second layer overlaps the second sub-pixel, and the third area of the second layer overlaps the third sub-pixel. ### Claim 6 (depends on 3) The display device of claim 3, wherein the first distance is greater than each of the second distance and the third distance and the third distance is smaller than the second distance. ### Claim 7 (depends on 3) The display device of claim 3, wherein a thickness of the first layer is a same as a thickness of the third layer. ### Claim 8 (depends on 7) The display device of claim 7, wherein the thickness of the first layer and the thickness of the third layer is less than 50 nm. ### Claim 9 (depends on 3) The display device of claim 3, wherein each of the first layer and the third layer includes silver, a silver alloy, aluminum, or an aluminum alloy and the second layer includes an oxide or air. ### Claim 10 (depends on 1) The display device of claim 1, wherein the color conversion structure includes: a third layer spaced apart from the second electrode; and a second layer between the second electrode and the third layer, the second layer including: a first area that spaces apart the second electrode and the third layer by a first distance; a second area that spaces apart the second electrode and the third layer by a second distance that is different from the first distance; and a third area that spaces apart the second electrode and the third layer by a third distance that different from both the first distance and the second distance. ### Claim 11 (depends on 10) The display device of claim 10, wherein the display device further comprises: a planarization film on the third layer of the color conversion structure; and a second substrate on the planarization film such that the planarization film and second substrate are in contact with each other. ### Claim 12 (depends on 10) The display device of claim 10, wherein a thickness of the second electrode and a thickness of the third layer are a same. ### Claim 13 (depends on 1) The display device of claim 1, wherein the color conversion structure includes: a first layer under the plurality of first electrodes and spaced apart from the plurality of first electrodes; a second layer on the first layer; and a third layer on the second layer such that the third layer is farther from the first substrate than the first layer and the second layer, wherein the second layer includes: a first area that spaces apart the first layer and the third layer by a first distance; a second area that spaces apart the first layer and the third layer by a second distance that is different from the first distance; and a third area that spaces apart the first layer and the third layer by a third distance that is different from both the first distance and the second distance. ### Claim 14 (depends on 13) The display device of claim 13, wherein the display device further comprises: an encapsulation layer on the second electrode; and a second substrate on the encapsulation layer, wherein light generated from the light-emitting layer travels through the color conversion structure and through the first substrate and is emitted out of the display device. ### Claim 15 (depends on 1) The display device of claim 1, wherein the color conversion structure includes: a first layer under the plurality of first electrodes and spaced apart from the plurality of first electrodes; a second layer on the first layer; and a third layer on the second layer such that the third layer is farther from the first substrate than the first layer and the second layer, wherein the second layer includes: a first area that spaces apart the first layer and the third layer by a first distance; a second area that spaces apart the first layer and the third layer by a second distance that is different from the first distance; and a third area that spaces apart the first layer and the third layer by a third distance that is different from both the first distance and the second distance, wherein the display device further comprises a buffer insulating layer between the plurality of first electrodes and the first layer. ### Claim 16 (depends on 15) The display device of claim 15, wherein the buffer insulating layer is between the plurality of first electrodes and the third layer, and the buffer insulating layer includes aluminum oxide. ### Claim 17 A display device comprising: a substrate; a plurality of transistors on the substrate; a plurality of light-emitting elements electrically connected to the plurality of transistors, the plurality of light-emitting elements including a first light-emitting element and a second light-emitting element that emit light of a same color; and a color conversion structure on the plurality of light-emitting elements, the color conversion structure including metal and comprising: a first portion on the first light-emitting element and having a first thickness, the first portion converting the light emitted by the first light-emitting element into a first color; and a second portion on the second light-emitting element and having a second thickness that is different from the first thickness, the second portion converting the light emitted by the second light-emitting element into a second color that is different from the first color. ### Claim 18 (depends on 17) The display device of claim 17, wherein the plurality of light-emitting elements further include a third light-emitting element that emits light of the same color as the first light-emitting element and the second light-emitting element, and the color conversion structure further comprises: a third portion on the third light-emitting element and having a third thickness that is different from the first thickness and the second thickness, the third portion converting the light emitted by the third light-emitting element into a third color that is different from the first color and the second color. ### Claim 19 (depends on 18) The display device of claim 18, wherein the color conversion structure comprises: a first metal layer included in the first portion, the second portion, and the third portion of the color conversion structure; a second layer on the first metal layer, the second layer included in the first portion, the second portion, and the third portion of the color conversion structure; and a second metal layer on the second layer, the second metal layer included in the first portion, the second portion, and the third portion of the color conversion structure. ### Claim 20 (depends on 19) The display device of claim 19, wherein a thickness of the first metal layer is a same as a thickness of the second metal layer. ### Claim 21 (depends on 20) The display device of claim 20, wherein a first portion of the second layer that is included in the first portion of the color conversion structure has a first thickness, a second portion of the second layer that is included in the second portion of the color conversion structure has a second thickness that is less than the first thickness, and a third portion of the second layer that is included in the third portion of the color conversion structure has a third thickness that is less than the second thickness. ### Claim 22 (depends on 21) The display device of claim 21, wherein an upper surface of the second metal layer in the first portion has a first height from the substrate, an upper surface of the second metal layer in the second portion has a second height from the substrate that is less than the first height, and an upper surface of the second metal layer in the third portion has a third height from the substrate that is less than the second height. ### Claim 23 (depends on 21) The display device of claim 21, wherein the color conversion structure is over the plurality of light-emitting elements such that the plurality of light-emitting elements are between the color conversion structure and the substrate. ### Claim 24 (depends on 21) The display device of claim 21, wherein the color conversion structure is under the plurality of light-emitting elements such that the color conversion structure is between the plurality of light-emitting elements and the substrate. ### Claim 25 (depends on 24) The display device of claim 24, further comprising: an insulating layer between the plurality of light-emitting elements and the color conversion structure.