# US 12,193,259 B2 · Flexible supporting layer and flexible display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,193,259 B2 - Document ID: US12193259B2 - Status: Granted - Kind: B2 - Application number: 17/801,702 - Filed: 2021-10-11 - Published: 2023-05-25 - Granted: 2025-01-07 - Earliest claimed: 2020-11-25 - Assignees: Chengdu Boe Optoelectronics Technology Co., Ltd.; Boe Technology Group Co., Ltd. - Applicants: Chengdu BOE Optoelectronics Technology Co., Ltd.; BOE Technology Group Co., Ltd. - Inventors: Shuquan Yang; Liqiang Chen; Chengchung Yang; Yang Gao; Chao Yang; Ziqi Song - Web page: https://patentgrep.com/patent/US12193259B2 ## CPC - H10K 50/844: Encapsulations - G06F 1/1624: {with sliding enclosures, e.g. sliding keyboard or display} - G06F 1/1652: {the display being flexible, e.g. mimicking a sheet of paper, or rollable} - G06F 1/1656: {Details related to functional adaptations of the enclosure, e.g. to provide protection against EMI, shock, water, or to host detachable peripherals like a mouse or removable expansions units like PCMCIA cards, or to provide access to internal components for maintenance or to removable storage supports like CDs or DVDs, or to mechanically mount accessories (mounting of accessories to a computer display G06F1/1607; display hoods G06F1/1603; cooling arrangements for portable computers G06F1/203)} - H10K 77/111: {Flexible substrates} - H10K 2102/311: {Flexible OLED} - Y02E 10/549: Organic PV cells - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract A flexible supporting layer and a flexible display device. The flexible supporting layer is applied in a flexible display device, and the content of a flexible supporting layer material per unit volume increases in the curl direction of the flexible display device. ## Claims ### Claim 1 A flexible supporting layer, applied in a flexible display apparatus, wherein: in a curl direction of the flexible display apparatus, a content of a material of the flexible supporting layer per unit volume increases. ### Claim 2 (depends on 1) The flexible supporting layer according to claim 1, wherein: the flexible supporting layer is provided with a plurality of grooves, and in the curl direction of the flexible display apparatus, a proportion of grooves per unit volume decreases. ### Claim 3 (depends on 2) The flexible supporting layer according to claim 2, wherein: the plurality of grooves are arranged in an array, all the plurality of grooves are of a same size, and in the curl direction of the flexible display apparatus, a quantity of the grooves per unit volume decreases. ### Claim 4 (depends on 2) The flexible supporting layer according to claim 2, wherein: the plurality of grooves are arranged in an array; and in the curl direction of the flexible display apparatus, a quantity of the grooves per unit volume is the same, and sizes of the grooves in different unit volumes decrease. ### Claim 5 (depends on 4) The flexible supporting layer according to claim 4, wherein: depths of all the plurality of grooves are the same; and in the curl direction of the flexible display apparatus, lengths of the grooves in different unit volumes are the same, and widths of the grooves in different unit volumes decrease. ### Claim 6 (depends on 4) The flexible supporting layer according to claim 4, wherein: depths of all the plurality of grooves are the same; and in the curl direction of the flexible display apparatus, lengths of the grooves in different unit volumes decrease, and widths of the grooves in different unit volumes are the same. ### Claim 7 (depends on 5) The flexible supporting layer according to claim 5, wherein the plurality of grooves are a plurality of vias penetrating through the flexible supporting layer. ### Claim 8 (depends on 2) The flexible supporting layer according to claim 2, wherein in the curl direction of the flexible display apparatus, lengths and widths of the plurality of grooves are the same, and depths of the grooves in different unit volumes decrease. ### Claim 9 (depends on 1) The flexible supporting layer according to claim 1, wherein shapes of the plurality of grooves comprise a rectangle, a square, a circle, an ellipse or an irregular shape. ### Claim 10 (depends on 1) The flexible supporting layer according to claim 1, wherein a material of the flexible supporting layer is metal, and the metal is a stainless steel or a shape memory alloy. ### Claim 11 A flexible display apparatus, comprising: a flexible substrate; a flexible display device, arranged on the flexible substrate; and a flexible supporting layer, arranged on a side of the flexible substrate facing away from the flexible display device; wherein in a curl direction of the flexible display apparatus, a content of a material of the flexible supporting layer per unit volume increases. ### Claim 12 (depends on 11) The flexible display apparatus according to claim 11, further comprising: a drive circuit layer arranged between the flexible display device and the flexible substrate, a back film arranged between the flexible substrate and the flexible supporting layer, and an encapsulation layer, a first adhesive layer, a polarizer, a touch layer, a second adhesive layer and a cover plate which are stacked in sequence and arranged on a side of the flexible display device facing away from the flexible substrate. ### Claim 13 (depends on 11) The flexible display apparatus according to claim 11, wherein: the flexible supporting layer is provided with a plurality of grooves, and in the curl direction of the flexible display apparatus, a proportion of grooves per unit volume decreases. ### Claim 14 (depends on 13) The flexible display apparatus according to claim 13, wherein: the plurality of grooves are arranged in an array, all the plurality of grooves are of a same size, and in the curl direction of the flexible display apparatus, a quantity of the grooves per unit volume decreases. ### Claim 15 (depends on 13) The flexible display apparatus according to claim 13, wherein: the plurality of grooves are arranged in an array; and in the curl direction of the flexible display apparatus, a quantity of the grooves per unit volume is the same, and sizes of the grooves in different unit volumes decrease. ### Claim 16 (depends on 15) The flexible display apparatus according to claim 15, wherein: depths of all the plurality of grooves are the same; and in the curl direction of the flexible display apparatus, lengths of the grooves in different unit volumes are the same, and widths of the grooves in different unit volumes decrease. ### Claim 17 (depends on 15) The flexible display apparatus according to claim 15, wherein: depths of all the plurality of grooves are the same; and in the curl direction of the flexible display apparatus, lengths of the grooves in different unit volumes decrease, and widths of the grooves in different unit volumes are the same. ### Claim 18 (depends on 17) The flexible display apparatus according to claim 17, wherein the plurality of grooves are a plurality of vias penetrating through the flexible supporting layer. ### Claim 19 (depends on 13) The flexible display apparatus according to claim 13, wherein in the curl direction of the flexible display apparatus, lengths and widths of the plurality of grooves are the same, and depths of the grooves in different unit volumes decrease. ### Claim 20 (depends on 11) The flexible display apparatus according to claim 11, wherein shapes of the plurality of grooves comprise a rectangle, a square, a circle, an ellipse or an irregular shape.