# US 11,029,724 B2 · Display device with pressure sensor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,029,724 B2 - Document ID: US11029724B2 - Status: Granted - Kind: B2 - Application number: 16/158,311 - Filed: 2018-10-12 - Published: 2019-06-13 - Granted: 2021-06-08 - Earliest claimed: 2017-12-12 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., Ltd. - Inventors: Won Ki Hong; Tae Hee Lee - Web page: https://patentgrep.com/patent/US11029724B2 ## CPC - G06F 1/1618: {the display being foldable up to the back of the other housing with a single degree of freedom, e.g. by 360° rotation over the axis defined by the rear edge of the base enclosure} - G06F 1/1641: {the display being formed by a plurality of foldable display components (G06F1/1647 takes precedence)} - G06F 1/1643: {the display being associated to a digitizer, e.g. laptops that can be used as penpads (details related to the relative motion of the display enclosure with respect to the body enclosure, e.g. to move between laptop and tablet PC configuration G06F1/1615)} - G06F 1/1652: {the display being flexible, e.g. mimicking a sheet of paper, or rollable} - G06F 3/0414: {using force sensing means to determine a position} - G06F 3/04144: {using an array of force sensing means (position sensing using the local deformation of sensor cells G06F3/0447)} - G09G 3/3233: with pixel circuitry controlling the current through the light-emitting element - G09G 3/3266: Details of drivers for scan electrodes - G09G 3/3275: Details of drivers for data electrodes - H10K 59/122: Pixel-defining structures or layers, e.g. banks - H10K 77/111: {Flexible substrates} - G06F 2203/04102: Flexible digitiser, i.e. constructional details for allowing the whole digitising part of a device to be flexed or rolled like a sheet of paper - G09F 9/301: {flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED} - G09G 2310/0264: Details of driving circuits - H10K 59/131: Interconnections, e.g. wiring lines or terminals - H10K 59/871: {Self-supporting sealing arrangements} - H10K 59/8722: {Peripheral sealing arrangements, e.g. adhesives, sealants} - 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 - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00) - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES - G09F: DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract A display device includes: a display panel; and a sensor provided on one surface of the display panel to detect external pressure. The sensor includes: a first base substrate having a sensing region and a non-sensing region; a plurality of first conductive patterns extending in a first direction in the sensing region of the first base substrate; a second base substrate facing opposite to the first base substrate; a plurality of second conductive patterns extending in a second direction intersecting the first conductive patterns disposed on a surface of the second base substrate; a pressure sensitive material layer disposed between the first and second conductive patterns, the pressure sensitive material layer having a resistance that varies in response to pressure; and an adhesive layer connecting the first and second base substrate, the adhesive layer being disposed in the same layer as the pressure sensitive material layer. ## Claims ### Claim 1 A display device comprising: a display panel; and a sensor disposed on one surface of the display panel to detect external pressure, wherein the sensor has a sensing region and a non-sensing region and comprises: a first base substrate having flexibility and including a flexible region having a first flexibility enhancing part formed in the sensing region; a plurality of first conductive patterns extending in a first direction in the sensing region of the first base substrate; a second base substrate facing opposite to the first base substrate, the second base substrate having flexibility and including a flexible region having a second flexibility enhancing part formed in the sensing region; a plurality of second conductive patterns extending in a second direction intersecting the first conductive patterns disposed on a surface of the second base substrate; a pressure sensitive material layer disposed in a space formed between the first and second conductive patterns and substantially filing the space without any gaps, the pressure sensitive material layer having a resistance that varies in response to pressure; and an adhesive layer connecting the first and second base substrate, the adhesive layer being disposed in the same layer as the pressure sensitive material layer, wherein the first flexibility enhancing part is formed on a surface on which the first conductive patterns on the first base substrate and the pressure sensitive material layer are not disposed. ### Claim 2 (depends on 1) The display device of claim 1, wherein, when external pressure is applied to the sensor, the resistance of the pressure sensitive material layer corresponding to a region in which the pressure is applied decreases. ### Claim 3 (depends on 2) The display device of claim 2, wherein the pressure sensitive material layer comprises a polymer compound and conductive particles dispersed in the polymer compound. ### Claim 4 (depends on 2) The display device of claim 2, wherein the pressure sensitive material layer is disposed in the extending direction of the first conductive patterns in the sensing region. ### Claim 5 (depends on 4) The display device of claim 4, wherein the pressure sensitive material layer overlaps with at least some of the plurality of first conductive patterns. ### Claim 6 (depends on 1) The display device of claim 1, wherein the adhesive layer comprises a first adhesive pattern disposed in the sensing region, and a second adhesive pattern disposed in the non-sensing region, the second adhesive pattern connecting with the first adhesive pattern. ### Claim 7 (depends on 6) The display device of claim 6, wherein the first adhesive pattern is disposed between ones of the first conductive patterns or between ones of the second conductive patterns. ### Claim 8 (depends on 7) The display device of claim 7, wherein the first adhesive pattern is disposed along the extending direction of the first conductive patterns or the second conductive patterns, and the second adhesive pattern is disposed along an edge of the sensing region in the non-sensing region. ### Claim 9 (depends on 8) The display device of claim 8, wherein the first adhesive pattern has a width smaller than the distance between adjacent second conductive patterns. ### Claim 10 (depends on 8) The display device of claim 8, wherein the first adhesive pattern has a width equal to the distance between adjacent second conductive patterns. ### Claim 11 (depends on 6) The display device of claim 6, wherein the adhesive layer has a thickness smaller than a value obtained by adding the thickness of the first conductive pattern and the thickness of the pressure sensitive material layer. ### Claim 12 (depends on 6) The display device of claim 6, wherein the adhesive layer comprises a pressure sensitive adhesive (PSA). ### Claim 13 (depends on 1) The display device of claim 1, wherein the second flexibility enhancing part is formed on a surface on which the second conductive patterns on the second base substrate are not disposed. ### Claim 14 (depends on 13) The display device of claim 13, wherein the first flexibility enhancing part comprises at least one first discontinuity, and the second flexibility enhancing part includes at least one second discontinuity. ### Claim 15 (depends on 14) The display device of claim 14, wherein the first discontinuity comprises a first trench having a shape that is recessed toward the other surface of the first base substrate, on which the first conductive patterns are disposed, from one surface of the first base substrate, and the second discontinuity comprises a second trench having a shape that is recessed toward the other surface of the second base substrate, on which the second conductive patterns are disposed, from one surface of the second base substrate. ### Claim 16 (depends on 15) The display device of claim 15, wherein each of the first trench and the second trench has a width corresponding to about 2πn when the curvature of a corresponding bent region is nR (n is a natural number of 1 or more). ### Claim 17 (depends on 15) The display device of claim 15, wherein each of the first trench and the second trench are alternately disposed. ### Claim 18 (depends on 17) The display device of claim 17, wherein the first trench has a depth that is equal to or smaller than a half of the thickness of the first base substrate, and the second trench has a depth that is equal to or smaller than a half of the thickness of the second base substrate. ### Claim 19 (depends on 1) The display device of claim 1, wherein the sensor is disposed on a surface of the display panel opposite to that surface from which light is emitted. ### Claim 20 (depends on 1) The display device of claim 1, wherein the pressure sensitive material layer is disposed between the first and second conductive patterns to fill air in between the first and second conductive patterns. ### Claim 21 A display device comprising: a display panel; a window disposed on a surface from which light of the display panel is emitted; a polarizing film disposed between the display panel and the window; and a sensor disposed on one surface of the display panel, wherein the sensor has a sensing region and a non-sensing region and comprises: a first base substrate having a flexible region that is foldable, the first base substrate comprising a first flexibility enhancing part formed in the sensing region; a plurality of first conductive patterns extending in a first direction in the sensing region of the first base substrate; a second base substrate facing opposite to the first base substrate, the second base substrate having flexibility and including a flexible region having a second flexibility enhancing part formed in the sensing region; a plurality of second conductive patterns extending in a second direction intersecting the first conductive patterns disposed on a surface of the second base substrate; a pressure sensitive material layer disposed in a space formed between the first and second conductive patterns and substantially filing the space without any gaps, the pressure sensitive material layer having a resistance that varies in response to pressure; and an adhesive layer connecting the first and second base substrates, the adhesive layer being disposed in the same layer as the pressure sensitive material layer, wherein the first flexibility enhancing part is formed on a surface on which the first conductive patterns on the first base substrate and the pressure sensitive material layer are not disposed. ### Claim 22 (depends on 21) The display device of claim 21, wherein, when external pressure is applied to the sensor, the resistance of the pressure sensitive material layer corresponding to a region in which the pressure is applied decreases, and the pressure sensitive material layer comprises a polymer compound and conductive particles dispersed in the polymer compound. ### Claim 23 (depends on 22) The display device of claim 22, wherein the pressure sensitive material layer is disposed along the extending direction of the first conductive patterns in the sensing region, and wherein the pressure sensitive material layer overlaps with each first conductive pattern. ### Claim 24 (depends on 21) The display device of claim 21, wherein the adhesive layer comprises a first adhesive pattern disposed in the sensing region, and a second adhesive pattern disposed in the non-sensing region, the second adhesive pattern connects with the first adhesive pattern. ### Claim 25 (depends on 24) The display device of claim 24, wherein the first adhesive pattern is disposed between and spaced part from adjacent first conductive patterns or between spaced part from adjacent second conductive patterns. ### Claim 26 (depends on 25) The display device of claim 25, wherein the first adhesive pattern is disposed along the extending direction of the first conductive patterns or the second conductive pattern, and the second adhesive pattern is disposed along an edge of the sensing region in the non-sensing region. ### Claim 27 (depends on 21) The display device of claim 21, wherein the sensor is disposed on a surface from which light from the display panel is not emitted. ### Claim 28 (depends on 21) The display device of claim 21, wherein the second flexibility enhancing part is formed on a surface on which the second conductive patterns on the second base substrate are not disposed. ### Claim 29 (depends on 28) The display device of claim 28, wherein the first flexibility enhancing part comprises at least one first discontinuity, and the second flexibility enhancing part comprises at least one second discontinuity. ### Claim 30 (depends on 29) The display device of claim 29, wherein the first discontinuity comprises a first trench having a shape that is recessed toward the other surface of the first base substrate, on which the first conductive patterns are disposed, from one surface of the first base substrate, and the second discontinuity comprises a second trench having a shape that is recessed toward the other surface of the second base substrate, on which the second conductive patterns are disposed, from one surface of the second base substrate. ### Claim 31 (depends on 30) The display device of claim 30, further comprising a cushion layer disposed on a surface from which light from the display panel is not emitted, the cushion layer comprising an elastically deformable material. ### Claim 32 (depends on 31) The display device of claim 31, wherein the cushion layer comprises a first surface corresponding to the surface from which light from the display panel is not emitted and a second surface opposite to the first surface, wherein the sensor is disposed on the second surface of the cushion layer. ### Claim 33 (depends on 21) The display device of claim 21, wherein the sensor is disposed between the surface from which light from the display panel is emitted and the polarizing film. ### Claim 34 (depends on 21) The display device of claim 21, wherein the polarizing film comprises a first surface corresponding to the surface from which light from the display panel is emitted and a second surface opposite to the first surface, wherein the sensor is disposed between the second surface of the polarizing film and the window. ### Claim 35 (depends on 21) The display device of claim 21, wherein the window comprises a first surface corresponding to the surface from which light from the display panel is emitted and a second surface opposite to the first surface, wherein the sensor is disposed on the second surface of the window. ### Claim 36 (depends on 35) The display device of claim 35, wherein the first flexibility enhancing part comprises at least one trench having a shape that is recessed toward the other surface of the first base substrate, on which the first conductive patterns are disposed, from one surface of the first base substrate, which corresponds to the second surface of the window.