# US 2021/0341663 A1 · Liquid crystal display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0341663 A1 - Document ID: US20210341663A1 - Status: Published application - Kind: A1 - Application number: 17/375,015 - Filed: 2021-07-14 - Published: 2021-11-04 - Earliest claimed: 2019-01-16 - Assignees: Japan Display Inc. - Applicants: Japan Display Inc. - Inventors: Nobuko FUKUOKA - Web page: https://patentgrep.com/patent/US20210341663A1 ## CPC - G02B 6/002: {by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces} - G02F 1/133615: {Edge-illuminating devices, i.e. illuminating from the side} - F21S 2/00: Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction - G02B 6/003: {Lens or lenticular sheet or layer} - G02F 1/1339: Gaskets; Spacers; Sealing of cells - G02F 1/133331: {Cover glasses} - G02F 1/1334: based on polymer dispersed liquid crystals, e.g. microencapsulated liquid crystals - G02F 1/133616: {Front illuminating devices} - G02F 1/13398: {Spacer materials; Spacer properties} - G02F 2202/28: Adhesive materials or arrangements - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - 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 - F21S: NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS ## Abstract According to one embodiment, a display device comprises first and second substrates and a liquid crystal layer. The second substrate has first and second surfaces and a side surface elongated in a first direction. The side surface includes first and second inclined surfaces on which end portions on the first surface side further protrude in a second direction intersecting the first direction than end portions on the second surface side. The first inclined surface is inclined at a first angle to a thickness direction of the second substrate. The second inclined surface is inclined at a second angle smaller than the first angle to the thickness direction. ## Claims ### Claim 1 A liquid crystal display device comprising: a first substrate; a second substrate having a first surface opposed to the first substrate, a second surface opposite to the first surface, and a side surface elongated in a first direction; and a liquid crystal layer between the first substrate and the second substrate, wherein the side surface includes a first inclined surface and a second inclined surface on which end portions on the first surface side further protrude in a second direction intersecting the first direction than end portions on the second surface side, the first inclined surface is inclined at a first angle to a thickness direction of the second substrate, and the second inclined surface is inclined at a second angle smaller than the first angle to the thickness direction. ### Claim 2 (depends on 1) The liquid crystal display device of claim 1, further comprising: a light source applying light onto the side surface. ### Claim 3 (depends on 2) The liquid crystal display device of claim 2, wherein the first substrate includes an elongated region that is more elongated in the second direction than the side surface, and the light source is arranged on the elongated region. ### Claim 4 (depends on 2) The liquid crystal display device of claim 2, further comprising: a lens located between the light source and the side surface to control a width in the second direction of the light emitted from the light source. ### Claim 5 (depends on 4) The liquid crystal display device of claim 4, further comprising: a resin layer filling a gap between the lens and the side surface. ### Claim 6 (depends on 1) The liquid crystal display device of claim 1, wherein the second inclined surface is located between the first inclined surface and an end portion of the side surface in the first direction. ### Claim 7 (depends on 1) The liquid crystal display device of claim 1, wherein the side surface further includes a third inclined surface that is located between the second inclined surface and the first substrate and on which an end portion on the first surface side further protrudes in the second direction than an end portion on the second surface side, and the third inclined surface is inclined at a third angle larger than the second angle to the thickness direction. ### Claim 8 (depends on 7) The liquid crystal display device of claim 7, wherein a width in the thickness direction of the third inclined surface is 60% or less of a thickness of the second substrate. ### Claim 9 (depends on 7) The liquid crystal display device of claim 7, wherein the end portion on the first surface side of the first inclined surface protrudes at a first height to the end portion on the second surface side of the first inclined surface, the end portion on the first surface side of the third inclined surface protrudes at a second height to the end portion on the second surface side of the second inclined surface, and the second height is larger than the first height. ### Claim 10 (depends on 9) The liquid crystal display device of claim 9, wherein a width in the thickness direction of the third inclined surface is 30% or less of a thickness of the second substrate, and the second height is 40% or less of the thickness of the second substrate. ### Claim 11 (depends on 7) The liquid crystal display device of claim 7, wherein each of the first angle and the second angle is 15 degrees or less, and the third angle is 30 degrees or more. ### Claim 12 (depends on 1) The liquid crystal display device of claim 1, further comprising: a connection structure located closer to the side surface than a display region including a plurality of pixels to electrically connect the first substrate with the second substrate, wherein the connection structure and the second inclined surface are arranged in the second direction. ### Claim 13 (depends on 12) The liquid crystal display device of claim 12, wherein the first substrate comprises pixel electrodes provided in the plurality of pixels, respectively, the second substrate comprises a common electrode opposed to the pixel electrodes, and the connection structure comprises a pad provided on the first substrate, and a conductive member arranged between the first substrate and the second substrate to electrically connect the pad with the common electrode. ### Claim 14 (depends on 13) The liquid crystal display device of claim 13, further comprising: a first sealing member arranged between the first substrate and the second substrate and surrounding the display region, wherein the conductive member is arranged outside the first sealing member. ### Claim 15 (depends on 14) The liquid crystal display device of claim 14, further comprising: a linear second sealing member arranged between the first sealing member and the side surface, wherein the second sealing member does not exist between the connection structure and the side surface. ### Claim 16 (depends on 15) The liquid crystal display device of claim 15, wherein an air layer is formed between the first sealing member and the second sealing member. ### Claim 17 (depends on 15) The liquid crystal display device of claim 15, wherein the first sealing member includes a curved portion, and the connection structure is located between an end portion in the first direction of the second substrate and the curved portion. ### Claim 18 (depends on 12) The liquid crystal display device of claim 12, wherein the connection structure is located more closely to an end portion in the first direction of the second substrate than the display region in the first direction. ### Claim 19 (depends on 2) The liquid crystal display device of claim 2, further comprising: a transparent cover member opposed to the second surface, wherein the light source applies light to a side surface of the cover member. ### Claim 20 (depends on 1) The liquid crystal display device of claim 1, wherein a length in the first direction of the second inclined surface is 5% or less of a full length of the side surface.