# US 12,765,242 B2 · Display panel with insulator layers > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,765,242 B2 - Document ID: US12765242B2 - Status: Granted - Kind: B2 - Application number: 18/565,693 - Filed: 2023-10-12 - Published: 2025-03-27 - Granted: 2026-10-13 - Earliest claimed: 2023-09-08 - Assignees: Wuhan China Star Optoelectronics Technology Co., Ltd. - Applicants: Wuhan China Star Optoelectronics Technology Co., Ltd. - Inventors: Xiang Zuo - Web page: https://patentgrep.com/patent/US12765242B2 ## CPC - H10K 59/879: {comprising refractive means, e.g. lenses} - H10K 59/40: OLEDs integrated with touch screens - H10K 59/873: {Encapsulations} - H10K 2102/351: {Thickness} - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES ## Abstract The embodiments of the present disclosure are directed to a display panel, which includes a substrate, a light-emitting layer, an insulation layer, and a flat layer. The insulation layer includes a plurality of convex portions corresponding to a pixel unit and a plurality of grooves disposed between adjacent convex portions. The insulation layer comprises a first insulator layer and a second insulator layer, and each of the convex portions comprises a first convex portion corresponding to the first insulator layer and a second convex portion corresponding to the second insulator layer, a roughness of a side wall of the groove corresponding to the first convex portion is greater than a roughness of a side wall of the groove corresponding to the second convex portion ## Claims ### Claim 1 A display panel, comprising: a substrate; a light-emitting layer, located on one side of the substrate, comprising a plurality of pixel units; an insulation layer, located on one side of the light-emitting layer away from the substrate, comprising a plurality of convex portions corresponding to a pixel unit and a plurality of grooves disposed between adjacent convex portions; and a flat layer, located on one side of the insulation layer away from the substrate, wherein a refractive index of the flat layer is lower than a refractive index of the insulation layer; wherein the insulation layer comprises a first insulator layer and a second insulator layer, and each of the convex portions comprises a first convex portion corresponding to the first insulator layer and a second convex portion corresponding to the second insulator layer, a roughness of a side wall of the groove corresponding to the first convex portion is greater than a roughness of a side wall of the groove corresponding to the second convex portion; wherein a nitrogen content in the first insulator layer is lower than a nitrogen content in the second insulator layer. ### Claim 2 (depends on 1) The display panel as claimed in claim 1, wherein the first insulator layer is disposed between the substrate and the second insulator layer. ### Claim 3 (depends on 2) The display panel as claimed in claim 2, wherein both the first insulator layer and the second insulator layer comprise inorganic insulation materials. ### Claim 4 (depends on 3) The display panel as claimed in claim 3, wherein both the first insulator layer and the second insulator layer contain the same inorganic insulation material, and a film-forming mass of the first insulator layers and a film-forming mass of the second insulator layers is different. ### Claim 5 (depends on 2) The display panel as claimed in claim 2, further comprising: a packaging layer, located on the side of the light-emitting layer away from the substrate; and a touch layer, located on one side of the packaging layer away from the substrate, comprising the first insulator layer, a first metal layer, the second insulator layer, a second metal layer, and the flat layer stacked sequentially; wherein the groove exposes a portion of a surface of the packaging layer on one side away from the substrate, and a roughness of the surface of the packaging layer on the side away from the substrate corresponding to the groove is disposed between the roughness of the side wall of the groove corresponding to the second convex portion and the roughness of the side wall of the groove corresponding to the first convex portion. ### Claim 6 (depends on 5) The display panel as claimed in claim 5, wherein the packaging layer comprises a first inorganic insulation layer, a first organic insulation layer, and a second inorganic insulation layer sequentially stacked, the groove exposes a portion of the surface of the second inorganic insulation layer on one side away from the substrate, a roughness of the surface of the second inorganic insulation layer on the side away from the substrate corresponding to the groove is disposed between the roughness of the side wall of the groove corresponding to the second convex portion and the roughness of the side wall of the groove corresponding to the first convex portion. ### Claim 7 (depends on 6) The display panel as claimed in claim 6, wherein the roughness of the surface of the second inorganic insulation layer on one side away from the substrate corresponding to the groove is greater than the roughness of the side wall of the groove corresponding to the second convex portion, and less than the roughness of the side wall of the groove corresponding to the first convex portion. ### Claim 8 (depends on 6) The display panel as claimed in claim 6, wherein the second inorganic insulation layer comprises inorganic insulation materials different from the first insulator layer and the second insulator layer. ### Claim 9 (depends on 5) The display panel as claimed in claim 5, wherein the surface of one side of the packaging layer near the insulation layer comprises a first portion and a second portion, the groove exposes the second portion, the convex portion covers the first portion, and a roughness of the second portion is greater than a roughness of the first portion. ### Claim 10 (depends on 5) The display panel as claimed in claim 5, wherein the second metal layer comprises a plurality of touch electrodes disposed between the corresponding pixel units, and the first metal layer comprises a touch wiring disposed between corresponding pixel units; and wherein the insulation layer further comprises an insulation portion disposed between the pixel units, a groove disposed between the insulation portion and the convex portion, the insulation portion comprises a first insulation sub portion disposed corresponding to the first insulator layer and a second insulation sub portion corresponding to the second insulator layer, and a touch control wiring disposed between the first insulation sub portion and the second insulation sub portion, the touch electrode is disposed between the second insulation portion and the flat layer. ### Claim 11 (depends on 2) The display panel as claimed in claim 2, wherein the convex portion comprises a first surface near the substrate and a second surface far from the substrate; and wherein the first surface and the second surface intersect with the same perpendicular cross-section of the substrate to form a first intersection line and a second intersection line, and a length of the first intersection line is greater than a length of the second intersection line. ### Claim 12 (depends on 11) The display panel as claimed in claim 11, wherein a roughness of the second surface of a raised portion is less than a roughness of the side wall corresponding to the groove of a second raised portion. ### Claim 13 (depends on 11) The display panel as claimed in claim 11, wherein the raised portion corresponds to the side wall of the groove comprising a side wall curve, wherein the side wall curve is formed by the intersection of the side wall of the raised portion corresponding to the groove and the cross-section perpendicular to the substrate, and the side wall curve is disposed between the first intersection line and the second intersection line; wherein an intersection angle disposed between the side wall curve and the first intersection line is greater than or equal to 20 degrees, and an intersection angle disposed between the side wall curve and the first intersection line is less than or equal to 55 degrees. ### Claim 14 (depends on 1) The display panel as claimed in claim 1, wherein a thickness of the first convex portion is less than or equal to a thickness of the second convex portion. ### Claim 15 (depends on 1) The display panel as claimed in claim 1, wherein along a direction from the substrate to the insulation layer, the roughness of the side wall corresponding to the groove of the first convex portion gradually decreases, and the roughness of the side wall corresponding to the groove of the second convex portion gradually decreases. ### Claim 16 (depends on 1) The display panel as claimed in claim 1, wherein the thickness of the convex portion is greater than or equal to 0.5 micrometers. ### Claim 17 (depends on 1) The display panel as claimed in claim 1, further comprising a pixel definition layer, wherein the pixel definition layer is located on the same side as the pixel unit on the substrate, the pixel definition layer comprising a pixel definition portion and a second opening located between the pixel definition portions, the pixel unit located within the second opening, and the convex portion corresponding to the second opening. ### Claim 18 A display panel, comprising: a substrate; a light-emitting layer, located on one side of the substrate, comprising a plurality of pixel units; an insulation layer, located on one side of the light-emitting layer away from the substrate, comprising a plurality of convex portions corresponding to a pixel unit and a plurality of grooves disposed between adjacent convex portions; and a flat layer, located on one side of the insulation layer away from the substrate, wherein a refractive index of the flat layer is lower than a refractive index of the insulation layer; wherein the insulation layer comprises a first insulator layer and a second insulator layer, and each of the convex portions comprises a first convex portion corresponding to the first insulator layer and a second convex portion corresponding to the second insulator layer, a roughness of a side wall of the groove corresponding to the first convex portion is greater than a roughness of a side wall of the groove corresponding to the second convex portion; wherein the difference in refractive index disposed between the insulating layer and the flat layer is greater than or equal to 0.3, and the difference in refractive index disposed between the insulating layer and the flat layer is less than or equal to 0.5. ### Claim 19 (depends on 18) The display panel as claimed in claim 18, wherein the flat layer is selected from a transparent organic material. ### Claim 20 A display panel, comprising: a substrate; a light-emitting layer, located on one side of the substrate, comprising a plurality of pixel units; an insulation layer, located on one side of the light-emitting layer away from the substrate, comprising a plurality of convex portions corresponding to a pixel unit and a plurality of grooves disposed between adjacent convex portions; and a flat layer, located on one side of the insulation layer away from the substrate, wherein a refractive index of the flat layer is lower than a refractive index of the insulation layer; wherein the insulation layer comprises a first insulator layer and a second insulator layer, and each of the convex portions comprises a first convex portion corresponding to the first insulator layer and a second convex portion corresponding to the second insulator layer, a roughness of a side wall of the groove corresponding to the first convex portion is greater than a roughness of a side wall of the groove corresponding to the second convex portion; wherein the first insulator layer is disposed between the substrate and the second insulator layer; wherein the convex portion comprises a first surface near the substrate and a second surface far from the substrate; wherein the first surface and the second surface intersect with the same perpendicular cross-section of the substrate to form a first intersection line and a second intersection line, and a length of the first intersection line is greater than a length of the second intersection line; and wherein a roughness of the second surface of a raised portion is less than a roughness of the side wall corresponding to the groove of a second raised portion.