# US 12,183,727 B2 · 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 12,183,727 B2 - Document ID: US12183727B2 - Status: Granted - Kind: B2 - Application number: 18/372,015 - Filed: 2023-09-22 - Published: 2024-01-11 - Granted: 2024-12-31 - Earliest claimed: 2019-12-27 - Assignees: LG Display Co., Ltd. - Applicants: LG Display Co., Ltd. - Inventors: Insik Shin; Jongseok Cha - Web page: https://patentgrep.com/patent/US12183727B2 ## CPC - H10K 50/844: Encapsulations - H10W 90/00: Package configurations - H10K 59/131: Interconnections, e.g. wiring lines or terminals - H10K 59/873: {Encapsulations} - H10K 77/111: {Flexible substrates} - H10K 2102/311: {Flexible OLED} - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES - H10W: GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10 ## Abstract A flexible display device may include a display panel including a display area and a bending area extending from one side of the display area to be bent, a back plate disposed on a rear surface of the display panel, a cushion tape disposed on a rear surface of the back plate, a driver integrated circuit (IC) disposed in a pad portion extending from the bending area, and a functional tape adhered between the cushion tape and the back plate and disposed to face the driver integrated circuit, so that effects capable of improving an EMI shielding function with a low cost, together with an adhesive function, and deriving an optimum efficiency, may be provided. ## Claims ### Claim 1 A flexible display device, comprising: a display panel including a display area and a bending area extending from one side of the display area to be bent; circuit wirings for supplying a gate signal and a data signal in a non-display area and passing the bending area; a cover glass over the display panel; and a light blocking pattern at an edge of the cover glass, wherein light blocking pattern overlaps at least a portion of the circuit wirings, and wherein the circuit wirings extend from the display area and are disposed in the bending area. ### Claim 2 (depends on 1) The flexible display device of claim 1, wherein the light blocking pattern is disposed on four edges of the cover glass. ### Claim 3 (depends on 2) The flexible display device of claim 2, wherein the light blocking pattern is disposed at edges of a rear surface of the cover glass. ### Claim 4 (depends on 1) The flexible display device of claim 1, further comprising: a polarizing plate on the display area; and an adhesive layer on the polarizing plate. ### Claim 5 (depends on 4) The flexible display device of claim 4, wherein the light blocking pattern is disposed to overlap the adhesive layer, the polarizing plate, and a portion of the display panel that are disposed under the light blocking pattern. ### Claim 6 (depends on 1) The flexible display device of claim 1, wherein the light blocking pattern is applied with black ink. ### Claim 7 (depends on 4) The flexible display device of claim 4, further comprising: a touch panel disposed between the polarizing plate and the display panel. ### Claim 8 (depends on 7) The flexible display device of claim 7, wherein the touch panel includes a plurality of touch sensors, and wherein the touch sensor includes at least one of a mutual capacitance sensor and a self-capacitance sensor. ### Claim 9 (depends on 1) The flexible display device of claim 1, wherein the circuit wirings are formed of a multilayer structure including various conductive materials. ### Claim 10 (depends on 1) The flexible display device of claim 1, wherein the portion of the circuit wirings disposed in the bending area are formed to extend in a diagonal direction, which is a direction different from a bending direction. ### Claim 11 (depends on 1) The flexible display device of claim 1, wherein the circuit wirings disposed in the bending area are formed in a shape such as a trapezoidal wave shape, a triangular wave shape, a sawtooth wave shape, a sinusoidal wave shape, an omega (Ω) shape, or a rhombus shape. ### Claim 12 A flexible display device, comprising: a display panel including a display area and a bending area extending from one side of the display area to be bent; circuit wirings for supplying a gate signal and a data signal in a non-display area and passing the bending area; a cover glass over the display panel; and a light blocking pattern at an edge of the cover glass, wherein light blocking pattern overlaps at least a portion of the circuit wirings, and wherein the circuit wirings are formed of a material such as a metal nano wire, metal mesh, or carbon nanotube (CNT). ### Claim 13 A flexible display device, comprising: a display panel including a display area and a bending area extending from one side of the display area to be bent; circuit wirings for supplying a gate signal and a data signal in a non-display area and passing the bending area; a cover glass over the display panel; a light blocking pattern at an edge of the cover glass; a back plate disposed on a rear surface of the display panel; a cushion tape disposed on a rear surface of the back plate; a driver integrated circuit (IC) disposed in a pad portion extending from the bending area; and a functional tape adhered between the cushion tape and the back plate and disposed to face the driver IC, wherein light blocking pattern overlaps at least a portion of the circuit wirings. ### Claim 14 (depends on 13) The flexible display device of claim 13, wherein the display panel comprises a first flat portion corresponding to the display area and maintained in a flat state, and a second flat portion facing the first flat portion and including the pad portion, the second flat portion being maintained in a flat state, and wherein the back plate comprises a second back plate positioned on a rear surface of the second flat portion. ### Claim 15 (depends on 14) The flexible display device of claim 14, wherein the functional tape comprises a first double-sided tape positioned on a rear surface of the cushion tape, a second double-sided tape positioned on an upper surface of the second back plate, and an EMI shielding sheet interposed between the first and second double-sided tapes, and wherein the functional tape has an offset gap between the first and second double-sided tapes and the EMI shielding sheet. ### Claim 16 (depends on 14) The flexible display device of claim 14, wherein the display panel further comprises: a curve portion positioned between the first flat portion and the second flat portion and corresponding to the bending area. ### Claim 17 (depends on 16) The flexible display device of claim 16, wherein the back plate further comprises: a first back plate positioned on a rear surface of the first flat portion. ### Claim 18 (depends on 17) The flexible display device of claim 17, wherein the cushion tape is disposed on a rear surface of the first back plate. ### Claim 19 (depends on 16) The flexible display device of claim 16, further comprising a micro-coating layer disposed on the curve portion of the display panel. ### Claim 20 (depends on 14) The flexible display device of claim 14, wherein the functional tape provides adhesion between the cushion tape and the second back plate and shields electro-magnetic interference (EMI) of the driver IC. ### Claim 21 (depends on 15) The flexible display device of claim 15, wherein the offset gap is formed on four edges between the first and second double-sided tapes and the EMI shielding sheet. ### Claim 22 (depends on 19) The flexible display device of claim 19, wherein the driver IC is disposed between the micro-coating layer and a circuit element, and wherein one end portion of the functional tape overlaps a portion of the micro-coating layer, and the other end portion of the functional tape is spaced apart from the circuit element by a predetermined distance. ### Claim 23 (depends on 1) The flexible display device of claim 1, further comprising: a thin film transistor in the display area and including a gate electrode, a source electrode, a drain electrode and a semiconductor layer; and planarization layers over the thin film transistor including a first planarization layer and a second planarization layer that are sequentially stacked. ### Claim 24 (depends on 23) The flexible display device of claim 23, wherein the planarization layers are formed of one or more of acrylic resin, epoxy resin, phenolic resin, polyamides resin, polyimides resin, unsaturated polyesters resin, polyphenylene resin, polyphenylene sulfides resin, and Benzocyclobutene. ### Claim 25 (depends on 23) The flexible display device of claim 23, wherein the circuit wirings in the bending area include a first wiring under the first planarization layer and a second wiring under the second planarization layer. ### Claim 26 (depends on 9) The flexible display device of claim 9, wherein the circuit wirings are formed of the conductive materials having high ductility, including gold (Au), silver (Ag), or aluminum (Al). ### Claim 27 (depends on 9) The flexible display device of claim 9, wherein the circuit wirings are formed of molybdenum (Mo), chromium (Cr), titanium (Ti), nickel (Ni), neodymium (Nd), copper (Cu), or an alloy of silver (Ag) and magnesium (Mg). ### Claim 28 (depends on 25) The flexible display device of claim 25, further comprising: a buffer layer under the first wiring and formed of an inorganic insulating layer.