US 11,985,770 B2
Display assembly and foldable display device
Kai Chen, Shanghai (CN); and Zhiyi Hong, Shanghai (CN)
Assigned to Hubei Yangtze Industrial Innovation Center of Advanced Display Co., LTD., Wuhan (CN)
Filed by Hubei Yangtze Industrial Innovation Center of Advanced Display Co., LTD., Wuhan (CN)
Filed on May 9, 2022, as Appl. No. 17/740,115.
Claims priority of application No. 202111419435.6 (CN), filed on Nov. 26, 2021.
Prior Publication US 2023/0171901 A1, Jun. 1, 2023
Int. Cl. H05K 5/02 (2006.01); H05K 5/00 (2006.01)
CPC H05K 5/0017 (2013.01) 16 Claims
OG exemplary drawing
 
1. A display assembly, comprising:
a display panel;
a support plate disposed at a non-display surface of the display panel; and
an adhesive layer for bonding the display panel and the support plate together,
wherein:
the display panel includes at least a bending area and non-bending areas disposed at two sides of the bending area;
the support plate is disposed at the non-bending areas;
the adhesive layer includes a first adhesive layer disposed at the non-bending areas and between the display panel and the support plate and a second adhesive layer disposed at the bending area and connected to the first adhesive layer;
at least a portion of the bending area is not covered by the adhesive layer;
the display assembly includes an unfolded state and a folded state;
in the folded state, the bending area has a semicircular shape;
the display assembly includes a central axis in the bending area; and
a distance between an end surface of the second adhesive layer facing toward the central axis and the central axis is L0, wherein L0=(R−h)·π·0.5, 0<h<R, R is a radius of the semicircle shape formed in a folding area when the display panel is in the folded state, h is a distance between a neutral surface of the display panel and a surface of the support plate facing toward the display panel, and the neutral surface of the display panel is a virtual plane of the display panel that is neither under tension nor under press.