# US 12,604,654 B2 · Display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,604,654 B2 - Document ID: US12604654B2 - Status: Granted - Kind: B2 - Application number: 17/980,569 - Filed: 2022-11-04 - Published: 2023-03-09 - Granted: 2026-04-14 - Earliest claimed: 2019-12-12 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., LTD. - Inventors: Kicheol Song; Young Do Kim; Youngmoon Kim; Nari Ahn - Web page: https://patentgrep.com/patent/US12604654B2 ## CPC - H10K 77/111: {Flexible substrates} - C09J 7/10: without carriers - H10K 59/87: {Passivation; Containers; Encapsulations} - H10K 59/8722: {Peripheral sealing arrangements, e.g. adhesives, sealants} - C09J 2203/318: for the production of liquid crystal displays - H10K 59/12: Active-matrix OLED [AMOLED] displays - H10K 59/40: OLEDs integrated with touch screens - H10K 59/8791: {Arrangements for improving contrast, e.g. preventing reflection of ambient light} - H10K 2102/311: {Flexible OLED} - Y02E 10/549: Organic PV cells - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES - C09J: ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES (preparation of glue or gelatine C09H) - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract A display device includes: a display panel; a window disposed on the display panel; a window protection layer disposed on the window; and a first adhesive layer disposed between the window and the window protection layer; wherein the first adhesive layer has a storage modulus of about 0.0317 MPa to about 0.0348 MPa, a loss modulus of about 0.0108 MPa to about 0.0120 MPa, and a tan delta value of about 0.3354 to about 0.3480 at the temperature of about 25° C. when a frequency of about 1 Hz and an axial force of about 1.0 N are applied and the first adhesive layer maintains a strain of about 1%, and the tan delta value is defined by dividing the loss modulus by the storage modulus. ## Claims ### Claim 1 A display device comprising: a display panel; a window disposed on the display panel; a window protection layer disposed on the window; and a first adhesive layer disposed between the window and the window protection layer, wherein the first adhesive layer has a storage modulus of about 0.0317 MPa to about 0.0348 MPa, a loss modulus of about 0.0108 MPa to about 0.0120 MPa, and a tan delta value of about 0.3354 to about 0.3480 at the temperature of about 25° C. when a frequency of about 1 Hz and an axial force of about 1.0 N are applied and the first adhesive layer maintains a strain of about 1%, and the tan delta value is defined by dividing the loss modulus by the storage modulus; wherein the first adhesive layer has a tan delta value of about 1.0216 to about 1.0519 at a temperature of about −20° C., wherein the first adhesive layer comprises a silicon-based resin, an acrylic-based resin, or an urethane-based resin. ### Claim 2 (depends on 1) The display device of claim 1, wherein the first adhesive layer has a creep value of about 38.1876% to about 40.4371% at a temperature of about 25° C. when a stress of about 2,000 Pa is applied to the first adhesive layer for about 10 minutes. ### Claim 3 (depends on 2) The display device of claim 2, wherein the first adhesive layer has a storage modulus of about 0.0490 MPa to about 0.0629 MPa, a loss modulus of about 0.0229 MPa to about 0.0318 MPa, and a tan delta value of about 0.4673 to about 0.5056 at a temperature of about 2° C. ### Claim 4 (depends on 2) The display device of claim 2, wherein the first adhesive layer has a storage modulus of about 0.0181 MPa to about 0.0243 MPa, a loss modulus of about 0.0073 MPa to about 0.0102 MPa, and a tan delta value of about 0.4033 to about 0.4309 at a temperature of about 60° C. ### Claim 5 (depends on 2) The display device of claim 2, wherein the first adhesive layer has a storage modulus of about 0.0137 MPa to about 0.0215 MPa, a loss modulus of about 0.0058 MPa to about 0.0095 MPa, and a tan delta value of about 0.4173 to about 0.4455 at a temperature of about 85° C. ### Claim 6 (depends on 2) The display device of claim 2, wherein the first adhesive layer has a residual strain of about 7.0426% to about 8.0211% at a temperature of about 25° C. when about 10 minutes elapse after the stress applied to the first adhesive layer is removed. ### Claim 7 (depends on 2) The display device of claim 2, wherein the first adhesive layer has a creep value of about 52.3894% to about 59.9129% at a temperature of about 60° C. when stress of about 2,000 Pa is applied to the first adhesive layer for about 10 minutes. ### Claim 8 (depends on 7) The display device of claim 7, wherein the first adhesive layer has a residual strain of about 6.3912% to about 8.5546% at a temperature of about 60° C. when about 10 minutes elapse after the stress applied to the first adhesive layer is removed. ### Claim 9 (depends on 2) The display device of claim 2, wherein the first adhesive layer has a thickness of about 10 μm to about 50 μm. ### Claim 10 (depends on 2) The display device of claim 2, wherein the window protection layer comprises at least one polymer resin of a polyethylene terephthalate, a polybutylene terephthalate, a polyethylene naphthalene, a polycarbonate, a polymethylmethacrylate, a polystyrene, a polyvinylchloride, a polyethersulfone, a polypropylene, a polyamide, a modified polyphenylene ether, a polyoxymethylene, a polysulfone, a polyphenylene sulfide, a polyimide, a polyethyleneimine, a polyether ether ketone, a polyamide imide, a polyarylate, and a thermoplastic polyurethane. ### Claim 11 (depends on 2) The display device of claim 2, further comprising: an input sensor disposed on the display panel; an anti-reflection layer disposed between the input sensor and the window; a protection layer disposed below the display panel; a support member disposed below the protection layer; a second adhesive layer disposed between the window and the anti-reflection layer; a third adhesive layer disposed between the anti-reflection layer and the input sensor; a fourth adhesive layer disposed between the display panel and the protection layer; and a fifth adhesive layer disposed between the protection layer and the support member; wherein at least one of the second, third, fourth, and fifth adhesive layers has substantially the same physical properties as the first adhesive layer. ### Claim 12 (depends on 11) The display device of claim 11, wherein the window comprises a glass. ### Claim 13 (depends on 12) The display device of claim 12, wherein an adhesive force of the first adhesive layer with respect to the window is about 810±25 gf/in at the temperature of about 25° C., and the adhesive force is a delamination force value when the window protection layer is attached to the window through the first adhesive layer and delaminated from the window after about 30 minutes elapse. ### Claim 14 (depends on 13) The display device of claim 13, wherein an adhesive force of the first adhesive layer with respect to the window is about 256±17 gf/in at the temperature of about 80° C., and the adhesive force is a delamination force value when the window protection layer is attached to the window through the first adhesive layer and delaminated from the window after about 30 minutes elapse. ### Claim 15 (depends on 14) The display device of claim 14, wherein at least one of the display panel and the window protection layer is in-folded or out-folded with respect to a folding axis. ### Claim 16 A display device comprising: a display panel; a window disposed on the display panel; a window protection layer disposed on the window; and a first adhesive layer disposed between the window and the window protection layer; wherein the first adhesive layer has a creep value of about 38.1876% to about 40.4371% at a temperature of about 25° C. when a stress of about 2,000 Pa is applied to the first adhesive layer for about 10 minutes, the first adhesive layer has a storage modulus of about 0.0317 MPa to about 0.0348 MPa and a loss modulus of about 0.0108 MPa to about 0.0120 MPa at the temperature of about 25° C. when a frequency of about 1 Hz and an axial force of about 1.0 N are applied and the first adhesive layer maintains a strain of about 1%; and wherein the first adhesive layer has a tan delta value of about 1.0216 to about 1.0519 at a temperature of about −20° C., wherein the first adhesive layer comprises a silicon-based resin, an acrylic-based resin, or an urethane-based resin. ### Claim 17 A display device comprising: a display panel; a window disposed on the display panel; a window protection layer disposed on the window; and a first adhesive layer disposed between the window and the window protection layer; wherein the first adhesive layer has a creep value of about 38.1876% to about 40.4371% at a temperature of about 25° C. when a stress of about 2,000 Pa is applied to the first adhesive layer for about 10 minutes, the first adhesive layer has a tan delta value of about 0.3354 to about 0.3480 at the temperature of about 25° C. when a frequency of about 1 Hz and an axial force of about 1.0 N are applied and the first adhesive layer maintains a strain of about 1%, the tan delta value is defined by dividing a loss modulus by a storage modulus; and wherein the first adhesive layer has a tan delta value of about 1.0216 to about 1.0519 at a temperature of about −20° C., wherein the first adhesive layer comprises a silicon-based resin, an acrylic-based resin, or an urethane-based resin.