CROSS REFERENCE TO RELATED APPLICATIONS

The present application claims the priority of the Chinese Patent Application No. 201922131550.8 filed on Dec. 2, 2019, the content of which is incorporated herein by reference in its entirety.

TECHNICAL FIELD

The present disclosure relates to the field of display technology, and in particular to a display substrate and a display device.

BACKGROUND

As a novel light emitting device, an Organic Light-Emitting Diode (OLED) has been greatly researched and applied in the field of display technology. Because the OLED is flexible, a display panel with a narrow frame, foldable property and other characteristics becomes the mainstream of a current product, and has a large development space.

SUMMARY

The present disclosure provides a display substrate including a display portion, a binding portion and a bendable portion between the display portion and the binding portion, the binding portion is on a side of the display portion distal to a light exit side of the display substrate; a support layer is on an inner side of the bendable portion, and the support layer extends from one end of the bendable portion close to the display portion to one end of the bendable portion close to the binding portion of the bendable portion and extends along an edge on the inner side of the bendable portion; and the bendable portion is bent around a bending axis.

In some embodiments, a cross-sectional shape of the bendable portion in a plane perpendicular to the bending axis is a partial circular ring, and an intersection point between the bending axis and the plane is a circle center of a circular ring where the bent bendable portion is located.

In some embodiments, a cross-sectional shape of the support layer in a plane perpendicular to the bending axis is a partial circular ring.

In some embodiments, the support layer covers an entire surface on the inner side of the bendable portion.

In some embodiments, a material of the support layer includes a curing adhesive cured by ultraviolet light UV.

In some embodiments, the support layer includes a plurality of support strips arranged along the edge on the inner side edge of the bendable portion from the one end of the bendable portion close to the display portion to the one end of the bendable portion close to the binding portion; in a cross section of the support strips in a plane perpendicular to the bending axis, a width of each of the support strips gradually increases from an end of the support strip proximal to the bending axis to an end of the support strip distal to the bending axis.

In some embodiments, a cross-sectional shape of the support strip in a plane perpendicular to the bending axis is trapezoidal.

In some embodiments, a cross-sectional shape of the support strip s in a plane perpendicular to the bending axis is semicircular.

In some embodiments, the display substrate further includes a back film, the back film includes a first layer of back film on a surface of the display portion proximal to the binding portion and a second layer of back film on a surface of the binding portion proximal to the display portion, and at least one end of the support layer abuts against the back film.

In some embodiments, the display substrate further includes a back film, the back film includes a first layer of back film on a surface of the display portion proximal to the binding portion and a second layer of back film on a surface of the binding portion proximal to the display portion, and both ends of the support layer abut against the back film.

In some embodiments, the end of the support layer abutting against the back film has a same thickness as the back film.

In some embodiments, the display substrate further includes a spacer block between the first layer of back film and the second layer of back film, the spacer block is provided with a chamfer structure at one end of the spacer block proximal to the binding portion, and the chamfer structure is on one side of the spacer block proximal to the bendable portion.

In some embodiments, the chamfer structure is a circular bead of R0.5 to R1 or a 45 degree chamfer of C0.5 to C1.

The present disclosure provides a display device including the aforementioned display substrate, and a flexible cover plate which is on the display substrate at a light exit side of the display substrate.

