# US 11,442,302 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 11,442,302 B2 - Document ID: US11442302B2 - Status: Granted - Kind: B2 - Application number: 16/928,102 - Filed: 2020-07-14 - Published: 2020-11-19 - Granted: 2022-09-13 - Earliest claimed: 2016-08-17 - Assignees: Semiconductor Energy Laboratory Co., Ltd. - Applicants: Semiconductor Energy Laboratory Co., Ltd. - Inventors: Shingo Eguchi; Hideaki Kuwabara; Kazune Yokomizo - Web page: https://patentgrep.com/patent/US11442302B2 ## CPC - G02F 1/133308: {Support structures for LCD panels, e.g. frames or bezels} - G02F 1/133603: {with LEDs} - G02F 1/1333: Constructional arrangements; {Manufacturing methods}(G02F1/135, G02F1/136 take precedence) - G02F 1/133608: {including particular frames or supporting means} - G09F 9/30: in which the desired character or characters are formed by combining individual elements (panels comprising a number of electrodes in a single cell controlling light arriving from an independent light source, e.g. electro-optical or magneto-optical cell, G02F1/00) - G09F 9/301: {flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED} - G09F 9/46: in which the desired character is selected from a number of characters arranged one behind the other - H05B 33/02: Details - H10D 30/67: Thin-film transistors [TFT] {(Stacked nanowire, nanosheet or nanoribbon FETs H10D30/501)} - H10D 30/6758: {characterised by the insulating substrates} - H10D 86/411: {characterised by materials, geometry or structure of the substrates} - H10D 86/60: wherein the TFTs are in active matrices - H10K 50/11: characterised by the electroluminescent [EL] layers - H10K 59/50: OLEDs integrated with light modulating elements, e.g. with electrochromic elements, photochromic elements or liquid crystal elements - H05B 33/14: characterised by the chemical or physical composition or the arrangement of the electroluminescent material {, or by the simultaneous addition of the electroluminescent material in or onto the light source} - H05B 33/22: characterised by the chemical or physical composition or the arrangement of auxiliary dielectric or reflective layers - H10K 2102/311: {Flexible OLED} - Y02E 10/549: Organic PV cells - G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS - G09F: DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS - H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL - H10D: INORGANIC ELECTRIC SEMICONDUCTOR DEVICES - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract A semiconductor device including a large display portion with improved portability is provided. The display device includes a first display panel, a second display panel, and an adhesive layer. The area of the second display panel is larger than the area of the first display panel. The first display panel includes a first substrate, a second substrate, and a reflective liquid crystal element and a first transistor each positioned between the first substrate and the second substrate. The second display panel includes a first resin layer having flexibility, a second resin layer having flexibility, and a light-emitting element and a second transistor each positioned between the first resin layer and the second resin layer. The liquid crystal element has a function of reflecting light toward the second substrate side. The light-emitting element has a function of emitting light toward the second resin layer side. The first substrate and part of the second resin layer are bonded to each other with the adhesive layer. ## Claims ### Claim 1 An electronic device comprising: a first display panel; and a second display panel, wherein an area of the second display panel is larger than an area of the first display panel, wherein the first display panel comprises: a glass substrate; and a first transistor, wherein the second display panel comprises: a flexible substrate; a light-emitting element; and a second transistor, wherein, in a state where a display surface of the second display panel is flat, the display surface of the second display panel comprises a first region overlapping with the first display panel and a second region not overlapping with the first display panel, wherein the second region overlaps with the first region when the display surface of the second display panel is bent, wherein the electronic device comprises a member having a curved surface which protects a region having a curvature of the display surface of the second display panel when the display surface of the second display panel is bent, and wherein, in an open state of the electronic device, a part of the member is exposed. ### Claim 2 (depends on 1) The electronic device according to claim 1, further comprising: a touch sensor, wherein the touch sensor is provided so as to overlap a region where the first region and the second region overlap with each other. ### Claim 3 (depends on 1) The electronic device according to claim 1, wherein the first transistor or the second transistor comprises an oxide semiconductor in a channel formation region. ### Claim 4 (depends on 3) The electronic device according to claim 3, wherein the oxide semiconductor comprises a crystalline region. ### Claim 5 (depends on 1) The electronic device according to claim 1, wherein the member comprises a resin. ### Claim 6 (depends on 1) The electronic device according to claim 1, wherein, in the open state, the member does not overlap with a display element and a transistor. ### Claim 7 (depends on 1) The electronic device according to claim 1, wherein, in the open state of the electronic device, the part of the member faces a user of the electronic device. ### Claim 8 An electronic device comprising: a first display panel; and a second display panel, wherein an area of the second display panel is larger than an area of the first display panel, wherein the first display panel comprises: a substrate; and a first transistor, wherein the second display panel comprises: a flexible substrate; a display element; and a second transistor, wherein, in a state where a display surface of the second display panel is flat, the display surface of the second display panel comprises a first region overlapping with the first display panel and a second region not overlapping with the first display panel, wherein the second region overlaps with the first region when the display surface of the second display panel is folded, wherein the electronic device comprises a member having a curved surface which protects a region having a curvature of the display surface of the second display panel when the display surface of the second display panel is folded, and wherein, in an open state of the electronic device, a part of the member is exposed. ### Claim 9 (depends on 8) The electronic device according to claim 8, further comprising: a touch sensor, wherein the touch sensor is provided so as to overlap a region where the first region and the second region overlap with each other. ### Claim 10 (depends on 8) The electronic device according to claim 8, wherein the first transistor or the second transistor comprises an oxide semiconductor in a channel formation region. ### Claim 11 (depends on 10) The electronic device according to claim 10, wherein the oxide semiconductor comprises a crystalline region. ### Claim 12 (depends on 8) The electronic device according to claim 8, wherein the member comprises a resin. ### Claim 13 (depends on 8) The electronic device according to claim 8, wherein, in the open state, the member does not overlap with a display element and a transistor. ### Claim 14 (depends on 8) The electronic device according to claim 8, wherein, in the open state of the electronic device, the part of the member faces a direction in which an image is to be displayed. ### Claim 15 An electronic device comprising: a first display panel; and a second display panel, wherein an area of the second display panel and an area of the first display panel are different from each other, wherein the first display panel comprises: a substrate; and a first transistor, wherein the second display panel comprises: a flexible substrate; a display element; and a second transistor, wherein, in an open state of the electronic device, the display surface of the second display panel comprises a first region overlapping with the first display panel and a second region not overlapping with the first display panel, wherein the second region overlaps with the first region when the display surface of the second display panel is folded, and wherein the electronic device comprises a member having a curved surface which protects a region having a curvature of the display surface of the second display panel when the display surface of the second display panel is folded, and wherein, in the open state of the electronic device, a part of the member is exposed. ### Claim 16 (depends on 15) The electronic device according to claim 15, further comprising: a touch sensor, wherein the touch sensor is provided so as to overlap a region where the first region and the second region overlap with each other. ### Claim 17 (depends on 15) The electronic device according to claim 15, wherein the first transistor or the second transistor comprises an oxide semiconductor in a channel formation region. ### Claim 18 (depends on 17) The electronic device according to claim 17, wherein the oxide semiconductor comprises a crystalline region. ### Claim 19 (depends on 15) The electronic device according to claim 15, wherein the member comprises a resin. ### Claim 20 (depends on 15) The electronic device according to claim 15, wherein, in the open state, the member does not overlap with a display element and a transistor.