# US 10,872,935 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 10,872,935 B2 - Document ID: US10872935B2 - Status: Granted - Kind: B2 - Application number: 16/679,938 - Filed: 2019-11-11 - Published: 2020-05-14 - Granted: 2020-12-22 - Earliest claimed: 2018-11-14 - Assignees: LG Display Co., Ltd. - Applicants: LG Display Co., Ltd. - Inventors: Byong-Hoo Kim; Min-Joo Kim; Eun-Pyo Hong; Jae-Won Lee; Sang-Hoon Pak; Sang-Hyuk Won; Jae-Man Jang; Sung-Jin Kim; Jae-Hyung Jang - Web page: https://patentgrep.com/patent/US10872935B2 ## CPC - G06F 3/0412: {Digitisers structurally integrated in a display} - G06F 3/04164: {Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads} - G06F 3/0443: {using a single layer of sensing electrodes} - G06F 3/0446: {using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes} - H10K 59/40: OLEDs integrated with touch screens - H10K 59/873: {Encapsulations} - 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 - G06F 2203/04103: Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices - G06F 2203/04111: Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate - H10K 59/12: Active-matrix OLED [AMOLED] displays - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES ## Abstract Disclosed is a display device capable of being manufactured through a simplified process and having improved touch sensitivity. The display device includes an encapsulation unit disposed on a light-emitting element, a touch sensor disposed on the encapsulation unit, and an intermediate layer disposed between the encapsulation unit and the touch sensor. The intermediate layer includes a first intermediate layer, having a dielectric constant that is lower than a dielectric constant of an organic film disposed above or under the intermediate layer, and a second intermediate layer, having greater hardness than the first intermediate layer, whereby touch sensitivity is improved while processing is simplified. ## Claims ### Claim 1 A display device, comprising: a light-emitting element disposed on a substrate; an encapsulation unit disposed on the light-emitting element; a touch sensor disposed on the encapsulation unit; and an intermediate layer disposed between the encapsulation unit and the touch sensor, the intermediate layer including first and second intermediate layers, wherein the first intermediate layer has a dielectric constant that is lower than a dielectric constant of an organic film disposed above or under the intermediate layer, the first intermediate layer extends in a non-active area more than the encapsulation unit. ### Claim 2 (depends on 1) The display device according to claim 1, wherein the second intermediate layer has greater hardness than the first intermediate layer. ### Claim 3 (depends on 1) The display device according to claim 1, wherein the first intermediate layer includes an organic material. ### Claim 4 (depends on 1) The display device according to claim 1, wherein the first and second intermediate layers are disposed along an upper surface of the encapsulation unit and a side surface of the encapsulation unit. ### Claim 5 (depends on 1) The display device according to claim 1, wherein the second intermediate layer is disposed on the first intermediate layer. ### Claim 6 (depends on 1) The display device according to claim 1, wherein the dielectric constant of the first intermediate layer is between 2.5 and 3.5. ### Claim 7 (depends on 1) The display device according to claim 1, wherein the second intermediate layer includes a siloxane-based material and silica. ### Claim 8 (depends on 1) The display device according to claim 1, wherein a hardness of an upper region of the second intermediate layer is greater than a hardness of a lower region of the second intermediate layer. ### Claim 9 (depends on 8) The display device according to claim 8, wherein the lower region of the second intermediate layer is thicker than the upper region of the second intermediate layer. ### Claim 10 (depends on 1) The display device according to claim 1, wherein the first intermediate layer comprises a siloxane-based polymer binder having a Si—O bond and mesoporous particles. ### Claim 11 (depends on 10) The display device according to claim 10, wherein each of the mesoporous particles includes a plurality of hexagonal hollow structures. ### Claim 12 (depends on 10) The display device according to claim 10, wherein the siloxane-based polymer binder has a cyclic bond structure. ### Claim 13 (depends on 1) The display device according to claim 1, further comprising a bending area disposed on the non-active area which is disposed around an active area of the substrate, wherein the bending area is an area that is bent in order to locate non-display areas on a rear surface of the active area. ### Claim 14 (depends on 13) The display device according to claim 13, wherein the first and second intermediate layers are not disposed on the bending area. ### Claim 15 (depends on 13) The display device according to claim 13, further comprising a crack prevention layer and at least one opening disposed in the bending area. ### Claim 16 (depends on 15) The display device according to claim 15, further comprising a touch pad lower electrode disposed under the crack prevention layer. ### Claim 17 (depends on 1) The display device according to claim 1, further comprising: a touch passivation film disposed on the touch sensor; a routing line connected to the touch sensor, the routing line being disposed along a side surface of the encapsulation unit; a touch pad connected to the routing line; and a dam disposed between the touch pad and the light-emitting element, wherein the organic film is one of the touch passivation film, the dam, or an organic encapsulation layer of the encapsulation unit. ### Claim 18 (depends on 17) The display device according to claim 17, wherein the routing line is in contact with the second intermediate layer. ### Claim 19 (depends on 17) The display device according to claim 17, wherein the touch sensor includes a touch-sensing line and a touch-driving line intersecting each other, wherein a touch dielectric film is disposed between the touch-sensing line and the touch-driving line, and the touch pad includes: a touch pad lower electrode disposed on the substrate; and a touch pad upper electrode connected to the touch pad lower electrode exposed through a touch pad contact hole formed through the first and second intermediate layers and the touch dielectric film. ### Claim 20 (depends on 19) The display device according to claim 19, further comprising a crack prevention layer disposed on the touch pad lower electrode. ### Claim 21 (depends on 19) The display device according to claim 19, wherein the touch pad lower electrode and a drain electrode include the same material. ### Claim 22 (depends on 19) The display device according to claim 19, wherein the routing line is connected to the touch pad lower electrode exposed through a routing contact hole formed through the first and second intermediate layers and the touch dielectric film. ### Claim 23 (depends on 19) The display device according to claim 19, wherein the dielectric constant of the first intermediate layer is lower than a dielectric constant of at least one of the touch passivation film, the dam, or the organic encapsulation layer. ### Claim 24 (depends on 23) The display device according to claim 23, wherein both of the touch-sensing line and the touch-driving line are opposite to the light-emitting element with the first intermediate layer disposed therebetween. ### Claim 25 A method of manufacturing a display device, comprising: forming a light-emitting element on a substrate; forming an encapsulation unit on the light-emitting element; forming an intermediate layer on the encapsulation unit; and forming a touch sensor on the intermediate layer, wherein the intermediate layer includes first and second intermediate layers, and wherein the first intermediate layer has a dielectric constant that is lower than a dielectric constant of an organic film disposed above or under the intermediate layer, and the second intermediate layer has greater hardness than a hardness of the first intermediate layer. ### Claim 26 (depends on 25) The method according to claim 25, wherein the second intermediate layer is disposed on the first intermediate layer.