# US 11,908,349 B2 · Display panel 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 11,908,349 B2 - Document ID: US11908349B2 - Status: Granted - Kind: B2 - Application number: 16/959,146 - Filed: 2020-05-27 - Published: 2023-05-18 - Granted: 2024-02-20 - Earliest claimed: 2020-04-02 - Assignees: Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd. - Applicants: Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd. - Inventors: Yong Zhao; Wen Han - Web page: https://patentgrep.com/patent/US11908349B2 ## CPC - G09F 9/301: {flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED} - B32B 3/266: {characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12} - B32B 7/12: using interposed adhesives or interposed materials with bonding properties - B32B 27/283: {comprising polysiloxanes} - G06F 1/1637: {Details related to the display arrangement, including those related to the mounting of the display in the housing} - G06F 1/1641: {the display being formed by a plurality of foldable display components (G06F1/1647 takes precedence)} - G06F 1/1652: {the display being flexible, e.g. mimicking a sheet of paper, or rollable} - G06F 3/0412: {Digitisers structurally integrated in a display} - B32B 2307/42: Polarizing, birefringent, filtering - B32B 2457/208: Touch screens - H04M 1/0214: {Foldable telephones, i.e. with body parts pivoting to an open position around an axis parallel to the plane they define in closed position (combined with translation movement H04M1/0235)} - H04M 1/0268: {including a flexible display panel} - Y02E 10/549: Organic PV cells - G09F: DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS - B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - H04M: TELEPHONIC COMMUNICATION (circuits for controlling other apparatus via a telephone cable and not involving telephone switching apparatus G08) - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract A display panel and a flexible display device are provided. The display panel includes a substrate, a first adhesive layer, a display layer, and a protective layer. The display layer includes an array layer and a light-emitting device layer. The array layer is disposed directly on the first adhesive layer, and a grid structure is disposed on the substrate. Neither a backplane nor a pressure-sensitive adhesive layer is disposed on the display panel, which allows effectively manufacture a thin display panel, reduces the film layers of the panel, and improves the flexibility of the display panel. ## Claims ### Claim 1 A display panel, comprising: a substrate; a first adhesive layer disposed on the substrate; a display layer disposed on the first adhesive layer; wherein the display layer comprises an array layer and a light-emitting device layer disposed on the array layer, the substrate is directly adhered to the array layer through the first adhesive layer, the substrate is used to support the display layer, and the substrate comprises a plurality of grid structures arranged discontinuously; and wherein two lateral sides of the substrate comprise a plurality of openings arranged at equal intervals, and each of the plurality of the grid structures is filled with an elastic material, wherein the substrate comprises at least one bending area, straight area, and connection area, and the bending area is connected to the straight area through the connection area, and wherein the substrate further comprises a first grid structure and a second grid structure, the first grid structure is disposed on the bending area of the substrate, and the second grid structure is disposed on connection area of the substrate. ### Claim 2 (depends on 1) The display panel according to claim 1, wherein a shape of the first grid structure is the same as a shape of the second grid structure. ### Claim 3 (depends on 2) The display panel according to claim 2, wherein a radial length of the first grid structure is greater than a radial length of the second grid structure. ### Claim 4 (depends on 1) The display panel according to claim 1, wherein a shape of each of the plurality of grid structures comprises a strip shape, a circular shape, an elliptical shape, or a wave shape, and the plurality of grid structures are arranged in an array manner. ### Claim 5 A display panel, comprising: a substrate; a first adhesive layer disposed on the substrate; a display layer disposed on the first adhesive layer; wherein, the display layer comprises an array layer and a light-emitting device layer disposed on the array layer, the substrate is directly adhered to the array layer through the first adhesive layer, the substrate is used to support the display layer, and the substrate comprises a plurality of grid structures discontinuously arranged, wherein the substrate comprises at least one bending area, straight area, and connection area, and the bending area is connected to the straight area through the connection area, and wherein the substrate further comprises a first grid structure and a second grid structure, the first grid structure is disposed on the bending area of the substrate, and the second grid structure is disposed on connection area of the substrate. ### Claim 6 (depends on 5) The display panel according to claim 5, wherein a shape of the first grid structure is the same as a shape of the second grid structure. ### Claim 7 (depends on 5) The display panel according to claim 5, wherein a density of the first grid structure is greater than a density of the second grid structure. ### Claim 8 (depends on 5) The display panel according to claim 5, wherein a radial length of the first grid structure is greater than a radial length of the second grid structure. ### Claim 9 (depends on 5) The display panel according to claim 5, wherein a density of the plurality of the grid structures in the connection area gradually decreases along the bending area toward the straight area. ### Claim 10 (depends on 5) The display panel according to claim 5, wherein each of the plurality of the grid structures penetrates the substrate. ### Claim 11 (depends on 5) The display panel according to claim 5, wherein two lateral sides of the substrate comprise a plurality of openings arranged at equal intervals. ### Claim 12 (depends on 5) The display panel according to claim 5, wherein a shape of each of the plurality of grid structures comprises a strip shape, a circular shape, an elliptical shape, or a wave shape, and the plurality of grid structures are arranged in an array manner. ### Claim 13 (depends on 12) The display panel according to claim 12, wherein at least one edge of the grid structure in a length direction is an arc shape. ### Claim 14 (depends on 5) The display panel according to claim 5, wherein the display layer further comprises a touch layer and a polarizer, the touch layer is disposed on the light-emitting device layer, and the polarizer is disposed on the touch layer. ### Claim 15 (depends on 5) The display panel according to claim 5, wherein the display panel further comprises an elastic layer, the elastic layer is disposed in the same layer as the substrate, and the elastic layer fills each of the plurality of grid structures. ### Claim 16 (depends on 15) The display panel according to claim 15, wherein a material of the elastic layer comprises silicone resin, metal material or amorphous material. ### Claim 17 A flexible display device, comprising: a substrate, wherein the substrate comprises at least one bending area, a straight area, and a connection area, and the bending area is connected to the straight area through the connection area; a first adhesive layer disposed on the substrate; a display layer disposed on the first adhesive layer; and a protective layer disposed on the display layer; wherein the display layer comprises an array layer and a light-emitting device layer disposed on the array layer, the substrate is directly adhered to the array layer through the first adhesive layer, and the bending area and the connection area of the substrate comprise a plurality of grid structures discontinuously arranged, and wherein as bending, the grid structures corresponding to the bending area and the connecting area are deformed to bend the flexible display device, wherein the substrate further comprises a first grid structure and a second grid structure, the first grid structure is disposed on the bending area of the substrate, and the second grid structure is disposed on connection area of the substrate.