Patent ID: 11956906
Assignee: BOE TECHNOLOGY GROUP CO., LTD.
Field: Surface technology, coating (Chemistry)
Classification: CPC B  H  G | IPC B  H

Claim 0:
1. A display device comprising a display substrate and a backboard support structure, wherein the backboard support structure comprises a substrate support film and an adhesive layer that are arranged in a laminated manner, and the backboard support structure is bonded to a non-display side of the display substrate via the adhesive layer,
the backboard support structure comprises a first bendable region and a first non-bent region, and the adhesive layer comprises a first portion located in the first bendable region and a second portion located in the first non-bent region; the first portion has a modulus of elasticity of about 1 KPa-150 KPa, the second portion has a modulus of elasticity of about 150 KPa-250 KPa, and the substrate support film has a modulus of elasticity of about 1 GPa-10 GPa; and
the display substrate is a foldable display substrate comprising a second bendable region and a second non-bent region,
wherein the first bendable region and the second bendable region are correspondingly arranged in a laminated manner, and the first non-bent region and the second non-bent region are correspondingly arranged in a laminated manner,
wherein the substrate support film has a thickness of about 20 μm-60 μm, and the adhesive layer has a thickness of about 10 μm-50 μm,
wherein the backboard support structure comprises a body region and a peripheral region, the adhesive layer comprises a third portion located in the body region and a fourth portion located in the peripheral region,
wherein the backboard support structure further comprises a spacing layer, the spacing layer is located between the adhesive layer and the substrate support film and is located in both of the body region and the peripheral region, and
the spacing layer comprises a protrusion structure located in the peripheral region and protruding towards the adhesive layer, and a surface of the adhesive layer away from the spacing layer is a flat surface, so that a thickness of the fourth portion of the adhesive layer is smaller than a thickness of the third portion of the adhesive layer,
wherein the spacing layer has a modulus of elasticity of about 1 GPa-4 GPa, and
wherein the protrusion structure has a protrusion height of about 10 μm-20 μm.