US 12,235,533 B2
Perimeter adhesive for improved reliability and reduced stress mura in curved displays with cover glass
Steven Roy Burdette, Big Flats, NY (US)
Assigned to CORNING INCORPORATED, Corning, NY (US)
Appl. No. 17/766,630
Filed by Corning Incorporated, Corning, NY (US)
PCT Filed Sep. 23, 2020, PCT No. PCT/US2020/052136
§ 371(c)(1), (2) Date Apr. 5, 2022,
PCT Pub. No. WO2021/076280, PCT Pub. Date Apr. 22, 2021.
Claims priority of provisional application 62/916,660, filed on Oct. 17, 2019.
Prior Publication US 2024/0053629 A1, Feb. 15, 2024
Int. Cl. G02F 1/1333 (2006.01); B60K 35/60 (2024.01); G02F 1/1335 (2006.01); H10K 59/80 (2023.01); B60K 35/22 (2024.01)
CPC G02F 1/133331 (2021.01) [B60K 35/60 (2024.01); G02F 1/133528 (2013.01); H10K 59/8722 (2023.02); H10K 59/8793 (2023.02); B60K 35/22 (2024.01)] 17 Claims
OG exemplary drawing
 
1. A curved display assembly, comprising:
a glass sheet having a first major surface and a second major surface opposite to the first major surface, the glass sheet having a first thickness measured between the first major surface and the second major surface, wherein the second major surface defines a first radius of curvature of the glass sheet and wherein the first radius of curvature has a bend axis;
a curved display having a second thickness between a first display surface and a second display surface, the display comprising a display region and two overhanging edges that are adjacent to the display region and parallel to the bend axis, wherein the two overhanging edges are disposed on opposite sides of the bend axis;
a first adhesive bonding the second display surface of the curved display to the second major surface of the glass sheet in the display region; and
a second adhesive bonds each of the two overhanging edges to the second major surface of the glass sheet, the second adhesive having a higher elastic modulus than the first adhesive;
wherein the overhanging edges each extend a distance outside of the display area that is at least three times the second thickness of the curved display,
wherein the curved display is a liquid crystal display (LCD) comprising a first polarizer defining the first display surface, a thin-film-transistor (TFT) substrate disposed on the first polarizer, a liquid crystal layer disposed on the TFT substrate, a color filter (CF) substrate disposed on the liquid crystal layer, and a second polarizer disposed on the CF substrate, the second polarizer defining the second display surface,
wherein the TFT substrate extends outward of peripheral edges of the CF substrate to form the overhanging edges, and
wherein the first radius of curvature is from 30 mm to 5 m, wherein the curved display comprises a cylindrical shape and the second adhesive applies a bending moment along the overhanging edges to maintain the cylindrical shape.