# US 11,077,645 B2 · Cover member and display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,077,645 B2 - Document ID: US11077645B2 - Status: Granted - Kind: B2 - Application number: 16/238,579 - Filed: 2019-01-03 - Published: 2019-05-09 - Granted: 2021-08-03 - Earliest claimed: 2016-08-03 - Assignees: AGC Inc. - Applicants: AGC Inc. - Inventors: Atsushi Inoue; Yasuhiro Inoue; Kyohei Hashimoto; Takashi Shibuya - Web page: https://patentgrep.com/patent/US11077645B2 ## CPC - B32B 17/10155: {Edge treatment or chamfering} - B32B 3/263: {characterised by a layer having non-uniform thickness} - B32B 7/12: using interposed adhesives or interposed materials with bonding properties - B32B 17/10: of synthetic resin - B32B 17/10036: {comprising two outer glass sheets} - B32B 17/10082: {Properties of the bulk of a glass sheet} - B32B 17/10293: {Edge features, e.g. inserts or holes} - B32B 17/10302: {Edge sealing} - B32B 17/10761: {containing vinyl acetal} - C03C 21/00: Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface - G02F 1/1333: Constructional arrangements; {Manufacturing methods}(G02F1/135, G02F1/136 take precedence) - G09F 9/00: Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements (in which the variable information is permanently attached to a movable support G09F11/00; abacus G06C1/00; slide-rules G06G1/00) - B32B 2307/538: Roughness - B32B 2457/20: Displays, e.g. liquid crystal displays, plasma displays - C03C 21/002: {to perform ion-exchange between alkali ions (C03C21/005 takes precedence)} - G02F 2201/50: Protective arrangements - B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM - C03C: CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS - 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 ## Abstract To provide a cover member excellent in edge safety, and a display device in which said cover member is used. A cover member which covers a display panel of a display device and which has a front surface that does not face the display panel and a rear surface that faces the display panel, said cover member being a laminate in which a first glass plate constituting said front surface and a second glass plate constituting said rear surface are bonded via an intermediate film interposed therebetween, wherein the first glass plate has a first inside chamfer which is a chamfer on the intermediate film side, and the first inside chamfer and the second glass plate or the intermediate film are bonded by a resin. ## Claims ### Claim 1 A cover member, which is a laminate comprising: a first glass plate forming a front surface of the cover member; a second glass plate forming a rear surface of the cover member; and an intermediate film interposed between the first and second glass plates and bonding the first and second glass plates such that an adhesive force between the first glass plate and the intermediate film is larger than an adhesive force between the second glass plate and the intermediate film, wherein the first glass plate has a first surface adjacent to the intermediate film, the second glass plate has a second surface adjacent to the intermediate film, and the first surface has a surface roughness different from a surface roughness of the second surface, the first glass plate has a first inside chamfer on a side of the intermediate film, the first inside chamfer is bonded to the second glass plate or the intermediate film by a resin, and the cover member is suitable for covering a display panel of a display device such that the front surface does not face the display panel and the rear surface faces the display panel. ### Claim 2 (depends on 1) The cover member according to claim 1, wherein a surface roughness Ra of the first inside chamfer is at least 100 nm. ### Claim 3 (depends on 1) The cover member according to claim 1, wherein the second glass plate has a second inside chamfer on a side of the intermediate film, and the resin is adhered to the second inside chamfer. ### Claim 4 (depends on 1) The cover member according to claim 1, wherein a protruding amount of the resin from side surface positions of the first glass plate and the second glass plate is at most 0.1 mm. ### Claim 5 (depends on 1) The cover member according to claim 1, wherein the resin is the same resin as a resin constituting the intermediate film. ### Claim 6 (depends on 1) The cover member according to claim 1, wherein a surface roughness Ra of the first inside chamfer is at most 500 nm. ### Claim 7 (depends on 1) The cover member according to claim 1, wherein the first glass plate is a tempered glass. ### Claim 8 (depends on 7) The cover member according to claim 7, wherein the tempered glass is a chemically tempered glass having a compressive stress layer with a thickness of at least 10 μm. ### Claim 9 (depends on 1) The cover member according to claim 1, wherein each of the first and second glass plates has a thickness of from 0.5 to 2.5 mm. ### Claim 10 (depends on 1) The cover member according to claim 1, wherein the intermediate film comprises at least one selected from the group consisting of polyvinyl butyral and ethylene vinyl acetate. ### Claim 11 (depends on 5) The cover member according to claim 5, wherein the intermediate film comprises at least one selected from the group consisting of polyvinyl butyral and ethylene vinyl acetate. ### Claim 12 (depends on 1) The cover member according to claim 1, wherein the resin comprises at least one selected from the group consisting of an acrylic resin, a silicone resin, an urethane acrylate resin and an epoxy resin. ### Claim 13 (depends on 1) The cover member according to claim 1, wherein each of the first and second glass plates has a thickness of from 1.3 to 2.5 mm. ### Claim 14 (depends on 1) The cover member according to claim 1, wherein the first surface of the first glass plate has a surface roughness Ra which is greater than a surface roughness Ra of the second surface of the second glass plate. ### Claim 15 (depends on 1) The cover member according to claim 1, wherein the first surface of the first glass plate has surface roughness Ra, Rz, Sa, and Sz which are greater than surface roughness Ra, Rz, Sa, and Sz of the second surface of the second glass plate, respectively. ### Claim 16 (depends on 1) The cover member according to claim 1, wherein the adhesive force between the first glass plate and the intermediate film is at least 23 N/25 mm, and the adhesive force between the second glass plate and the intermediate film is at least 5.7 N/25 mm. ### Claim 17 (depends on 5) The cover member according to claim 5, wherein the intermediate film consists of the resin. ### Claim 18 (depends on 1) The cover member according to claim 1, wherein the intermediate film consists of polyvinyl butyral or ethylene vinyl acetate. ### Claim 19 (depends on 1) A display device, comprising: a cover member of claim 1; and the display panel. ### Claim 20 (depends on 19) The display device according to claim 19, which is an in-vehicle display device.