CROSS-REFERENCE TO RELATED APPLICATIONS

This is the U.S. National Stage of International Patent Application No. PCT/CN2018/121255, filed Dec. 14, 2018, which in turn claims the benefit of Chinese Patent Application No. 201811314045.0 filed Nov. 6, 2018.

FIELD OF THE INVENTION

The present relates to a flexible display technical region, in particular to a flexible display panel and a display device.

BACKGROUND OF THE INVENTION

With flexible display panels are popularized, the demand for durability of bending of the flexible display panels becomes higher and higher nowadays.FIG. 1is a plan view of a bending region of the prior art device. The flexible display panel includes a display region12, a bending region11, and a driving circuit13, wherein the bending region11is located at a lower side of the flexible display panel. Since the bending region11needs to withstand the weight of the flexible panel and is an area of the flexible display panel which has a high risk of breakage, the strength and toughness of the bending region11are significantly important.FIG. 2is an enlarged view of a plurality of metal wirings in the bending region11.FIG. 3is an enlarged view of one of the metal wirings; an edge of the metal wiring14is in a linear shape; and a plurality of openings16are arranged neatly and evenly distributed along the metal wiring14. A position15is marked as a place having a high-risk of breakage. Since the bending region is a layered structure, when the display panel is bent, an area having a high risk of breakage will be formed at a position between an edge of the metal wiring14and each of the openings16.

FIG. 4is a stress distribution diagram of the bending metal wiring structure of the prior art device. The x-axis is a direction along which the metal wiring is extended, and the y-axis is the magnitude of a stress value. It can be seen fromFIG. 4that the stress distribution of the bending metal wiring is not uniform, and the stress is relatively concentrated in the place having a high risk of breakage areas, which is near the edges of the metal wiring and the openings, and which easily leads to breakage of the metal wiring.

SUMMARY OF THE INVENTION

The object of the invention is to provide a flexible panel or a display device, which can effectively solve the technical problem of stress concentration in bending region of the metal wirings and easy breakage of the bending region in the existing flexible display panel.

In order to solve the above technical problems, the present invention provides a flexible display panel including a display region and a bending region. The bending region includes a plurality of metal wirings, a flexible substrate, an inorganic film layer, and a coating layer.

Each of the metal wirings is in a long strip shape and includes a metal strip and a plurality of openings through the metal strip. In the width direction of the metal strip, a ratio of a minimum distance from a point of an edge of one of the openings to a neighboring side of the metal strip to minimum width of the metal strip ranges from 0.1 to 0.7.

Further, the bending region also includes: a flexible substrate; and an inorganic film layer, one side of the inorganic film layer being attached to the flexible substrate, and the other side of the inorganic film layer being attached to a metal wiring layer; wherein two or more of the metal wirings are parallel to each other and evenly distributed in the bending region.

Further, the bending region also includes a coating layer which is attached to a side of the metal wiring layer away from the inorganic layer.

Further, the coating layer is made of organic material, and the coating layer fills the openings and covers the metal wirings.

Further, each of the metal wirings includes at least one notch provided in at least one side of each metal wiring.

Further, two or more of the openings are arranged in a straight line and evenly distributed along the metal strip, and portions of the metal strip between the middle of each notch and two adjacent openings are symmetrically disposed.

Further, the notches each are in an arcuate or a semicircular shape.

Further, a bottom of a cross section of each of the notches is a smooth arc.

Further, the smooth arc is a sinusoid, a parabola or a circular arc.

In order to solve the above problems, the present invention also provides a display device including the flexible display panel described above.

Advantageous Effects of the Present Invention

The present invention provides new a flexible display substrate and a display device, the problem of uniform stress at different positions of the metal wirings is solved by changing the shape of the metal wirings in the bending region of the panel, thereby effectively reducing the occurrence of breakage of the display panel when it bent.

