Cover plate, preparation method of cover plate, display panel and display device

Abstract

The invention relates to the technical field of display, and discloses a cover plate, a preparation method of the cover plate, a display panel and a display device. The bending reliability and deformation recovery reliability of the cover plate are improved. The cover plate comprises a transparent substrate layer and a hardening layer located above the transparent substrate layer, wherein the transparent substrate layer comprises a bent area and a non-bent area; soft hardening materials and rigid hardening materials are alternately arranged on the portion, on the bent area, of the hardening layer; the portion, on the non-bent area, of the hardening layer is provided with a rigid hardening material. In the cover plate, the bent area is provided with the flexible hardening materials so thatthe hardening layer breaking phenomenon cannot occur when the bending radius of the bent area of the cover plate is small, and then the bending reliability of the cover plate can be improved. Meanwhile, the rigid hardening materials of the bent area and the rigid hardening material of the non-bent area are arranged so that the surface hardness of the cover plate can be guaranteed, the cover platecan still restore a flat state after dynamic bending or long-time static bending.

Description

Technical field [0001] The present invention relates to the field of display technology, in particular to a cover plate and a preparation method thereof, a display panel and a display device. Background technique [0002] When the traditional hardened cover plate for flexible display is bent with a small bending radius (R less than 3mm), the hardened layer in the bending area is prone to fracture due to strong rigidity and insufficient toughness. This phenomenon greatly affects The appearance and reliability of the product can be displayed flexibly. At the same time, the traditional hardened cover cannot be restored to a flat state after dynamic bending or static bending for a long time due to its own recovery stress and insufficient elastic modulus. This affects the usability and reliability of flexible display products. Summary of the invention [0003] The invention discloses a cover plate, a preparation method thereof, a display panel, and a display device, which are used to ...

AI Technical Summary

Problems solved by technology

[0002] When the traditional hardened cover for flexible display is bent with a small bending radius (R is less than 3mm), the hardened layer in the bent area is prone to fracture due to its strong rigidity and insufficient toughness. This phenomenon greatly affects the The appearance and reliability of the flexible display product; at the same time, due to its own insufficient recovery stress and elastic modulus, the traditional hardened cover cannot return to a flat state after dynamic bending or a long period of static bending, which is also extremely large. Affect the usability and reliability of flexible display products

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