# US 12,111,694 B2 · Display panel and display terminal > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,111,694 B2 - Document ID: US12111694B2 - Status: Granted - Kind: B2 - Application number: 17/615,217 - Filed: 2021-11-05 - Published: 2023-11-02 - Granted: 2024-10-08 - Earliest claimed: 2021-10-26 - Assignees: Huizhou China Star Optoelectronics Display Co., Ltd. - Applicants: Huizhou China Star Optoelectronics Display Co., Ltd. - Inventors: Yichun Huang; Kanmeng Wang; Cen Yi - Web page: https://patentgrep.com/patent/US12111694B2 ## CPC - G06F 1/1652: {the display being flexible, e.g. mimicking a sheet of paper, or rollable} - G02F 1/1333: Constructional arrangements; {Manufacturing methods}(G02F1/135, G02F1/136 take precedence) - G06F 1/1601: {Constructional details related to the housing of computer displays, e.g. of CRT monitors, of flat displays (constructional details related to flat displays integrated in a portable computer, e.g. laptop, handheld computer G06F1/1637; constructional details related to television receivers H04N5/64)} - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS ## Abstract A display panel and a display terminal are provided. An arc line segment having a plurality of radii of curvature is used, and the radius of curvature of the arc line segment gradually decreases in a direction away from a center of the arc line segment, so that degumming stress and forming stress caused by bending deformation of the display panel can be reduced, and an angle between each linear segment and a tangent plane at the center of the arc line segment is reduced simultaneously, thereby resolving a problem of serious light leakage at a periphery of an existing display panel due to deformation. ## Claims ### Claim 1 A display panel, wherein a cross section of the display panel comprises an arc line segment and two linear segments symmetrically distributed on two ends of the arc line segment and tangent to the arc line segment; and the arc line segment has a plurality of radii of curvature, and the radius of curvature of the arc line segment gradually decreases in a direction away from a center of the arc line segment, wherein a length of each linear segment accounts for 15% to 25% of a total length of the two linear segments and the arc line segment, and a length of the arc line segment accounts for 50% to 70% of the total length of the two linear segments and the arc line segment. ### Claim 2 (depends on 1) The display panel as claimed in claim 1, wherein a shape of the cross section of the display panel satisfies an equation: y=ax4+bx2, wherein a and b are both constants, X is a projection length of the display panel on a center tangent plane of the display panel, and Y is a projection length of the display panel on a plane perpendicular to the center tangent plane. ### Claim 3 (depends on 1) The display panel as claimed in claim 1, wherein an angle between each linear segment and a tangent plane at the center of the arc line segment ranges from 9° to 12°. ### Claim 4 (depends on 1) The display panel as claimed in claim 1, wherein the length of each linear segment accounts for 15% of the total length of the two linear segments and the arc line segment, and the length of the arc line segment accounts for 70% of the total length of the two linear segments and the arc line segment. ### Claim 5 (depends on 1) The display panel as claimed in claim 1, wherein the radius of curvature of the arc line segment nonlinearly decreases in directions from the center of the arc line segment to the two ends of the arc line segment. ### Claim 6 (depends on 5) The display panel as claimed in claim 5, wherein the arc line segment comprises a plurality of arc line subsegments, and in the direction away from the center of the arc line segment and in any two arc line subsegments: a change rate of a radius of curvature of the arc line subsegment away from the center of the arc line segment is less than a change rate of a radius of curvature of the other arc line subsegment close to the center of the arc line segment. ### Claim 7 (depends on 1) The display panel as claimed in claim 1, wherein the radius of curvature of the arc line segment linearly decreases in directions from the center of the arc line segment to the two ends of the arc line segment. ### Claim 8 (depends on 7) The display panel as claimed in claim 7, wherein the arc line segment comprises a plurality of arc line subsegments, and in the direction away from the center of the arc line segment and in any two arc line subsegments: a change rate of a radius of curvature of the arc line subsegment away from the center of the arc line segment is equal to a change rate of a radius of curvature of the other arc line subsegment close to the center of the arc line segment. ### Claim 9 (depends on 1) The display panel as claimed in claim 1, wherein the cross section of the display panel is a continuous curved surface, a radius of curvature of the curved surface is 1500 mm, and the radius of curvature of the arc line segment ranges from 1200 mm to 1300 mm. ### Claim 10 A display terminal, comprising a terminal body and a display panel, wherein the terminal body and the display panel are integrally combined, and a cross section of the display panel comprises an arc line segment and two linear segments symmetrically distributed on two ends of the arc line segment and tangent to the arc line segment; and the arc line segment has a plurality of radii of curvature, and the radius of curvature of the arc line segment gradually decreases in a direction away from a center of the arc line segment, wherein a length of each linear segment accounts for 15% to 25% of a total length of the two linear segments and the arc line segment, and a length of the arc line segment accounts for 50% to 70% of the total length of the two linear segments and the arc line segment. ### Claim 11 (depends on 10) The display terminal as claimed in claim 10, wherein a shape of the cross section of the display panel satisfies an equation: y=ax4+bx2, wherein a and b are both constants, X is a projection length of the display panel on a center tangent plane of the display panel, and Y is a projection length of the display panel on a plane perpendicular to the center tangent plane. ### Claim 12 (depends on 10) The display terminal as claimed in claim 10, wherein an angle between each linear segment and a tangent plane at the center of the arc line segment ranges from 9° to 12°. ### Claim 13 (depends on 10) The display terminal as claimed in claim 10, wherein the length of each linear segment accounts for 15% of the total length of the two linear segments and the arc line segment, and the length of the arc line segment accounts for 70% of the total length of the two linear segments and the arc line segment. ### Claim 14 (depends on 10) The display terminal as claimed in claim 10, wherein the radius of curvature of the arc line segment nonlinearly decreases in directions from the center of the arc line segment to the two ends of the arc line segment. ### Claim 15 (depends on 14) The display terminal as claimed in claim 14, wherein the arc line segment comprises a plurality of arc line subsegments, and in the direction away from the center of the arc line segment and in any two arc line subsegments: a change rate of a radius of curvature of the arc line subsegment away from the center of the arc line segment is less than a change rate of a radius of curvature of the other arc line subsegment close to the center of the arc line segment. ### Claim 16 (depends on 10) The display terminal as claimed in claim 10, wherein the radius of curvature of the arc line segment linearly decreases in directions from the center of the arc line segment to the two ends of the arc line segment. ### Claim 17 (depends on 16) The display terminal as claimed in claim 16, wherein the arc line segment comprises a plurality of arc line subsegments, and in the direction away from the center of the arc line segment and in any two arc line subsegments: a change rate of a radius of curvature of the arc line subsegment away from the center of the arc line segment is equal to a change rate of a radius of curvature of the other arc line subsegment close to the center of the arc line segment. ### Claim 18 (depends on 10) The display terminal as claimed in claim 10, wherein the cross section of the display panel is a continuous curved surface, a radius of curvature of the curved surface is 1500 mm, and the radius of curvature of the arc line segment ranges from 1200 mm to 1300 mm. ### Claim 19 A display terminal, comprising a terminal body and a display panel, wherein the terminal body and the display panel are integrally combined, and a cross section of the display panel comprises an arc line segment and two linear segments symmetrically distributed on two ends of the arc line segment and tangent to the arc line segment; and the arc line segment has a plurality of radii of curvature, and the radius of curvature of the arc line segment gradually decreases in a direction away from a center of the arc line segment, wherein the radius of curvature of the arc line segment linearly or nonlinearly decreases in directions from the center of the arc line segment to the two ends of the arc line segment. ### Claim 20 (depends on 19) The display terminal as claimed in claim 19, wherein the arc line segment comprises a plurality of arc line subsegments, and in the direction away from the center of the arc line segment and in any two arc line subsegments: a change rate of a radius of curvature of the arc line subsegment away from the center of the arc line segment is less than or equal to a change rate of a radius of curvature of the other arc line subsegment close to the center of the arc line segment.