Backboard of folding display panel and preparation method thereof

Abstract

The invention provides a backboard of a folding display panel and a preparation method thereof. The backboard comprises a substrate, a bonding layer located on the substrate and an anti-bending metalplate located on the bonding layer, wherein the anti-bending metal plate is preferably SUS stainless steel, the thickness of the SUS stainless steel layer is preferably 0.3 mm to 1.5 mm, and a grooveis formed in the side, close to the bonding layer, of the anti-bending metal plate; the inner wall of the groove is bent or inclined towards the center of the groove, the groove is filled with the bonding layer, the contact area between the bonding layer and the anti-bending metal plate is effectively increased through the groove, the interface adhesive force can be effectively improved, the situation that the anti-bending metal plate is separated from the bonding layer is avoided, a part of the bonding layer is embedded in the groove, and the inner wall of the groove limits the bonding layerto extend outwards, so that deformation of the bonding layer is further reduced, and the phenomenon that the bonding layer extrudes the substrate is avoided; and stress distribution of the bending area is more coordinated, continuous and uniform, and therefore, the display quality of the folding display panel is improved.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a backplane for a foldable display panel and a preparation method thereof. Background technique [0002] With the development of display technology and the demands of consumers, a rollable display device emerges as the times require. When in use, the user can curl and fold the rollable display device according to needs, so as to reduce the size of the display device and improve the portability of the display device; or, the user can unfold the rollable display device to obtain a larger Display screen. [0003] The rollable display device includes a rollable display module and a back plate located on the back of the display module. The back plate is made of aluminum alloy and PET profiles with certain flexibility, and the aluminum alloy and PET profiles are bonded with optically transparent adhesive. In the long-term folding process, the bending radius of the bending part in th...

AI Technical Summary

Problems solved by technology

[0005] Embodiments of the present invention provide a backplane for a foldable display panel and a preparation method thereof, which can solve the problem of stress caused by separation of the aluminum alloy and PET profiles during long-term bending of the backplane composed of aluminum alloy and PET profiles in the prior art. Concentration, technical issues that affect the display quality of flexible OLED display panels

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