阅读说明：本技术 显示基板及其制备方法、显示母板和显示装置 (Display substrate, preparation method thereof, display mother board and display device ) 是由 韩林宏 于鹏飞 刘庭良 张毅 秦世开 于 2020-06-10 设计创作，主要内容包括：提供一种显示基板,包括柔性基底(10)和设置在柔性基底(10)上的复合绝缘层,显示基板的边缘区域(500)包括由柔性基底(10)和复合绝缘层形成的台阶结构；台阶结构中台阶的高度从显示基板边缘到显示基板内部的方向依次增大；边缘区域(500)还包括覆盖台阶结构的第一平坦层(20),第一平坦层(20)的边缘与柔性基板(10)的边缘平齐。还提供显示基板的制备方法、显示母板和显示装置。(A display substrate is provided, which comprises a flexible substrate (10) and a composite insulating layer arranged on the flexible substrate (10), wherein an edge area (500) of the display substrate comprises a step structure formed by the flexible substrate (10) and the composite insulating layer; the heights of the steps in the step structure are sequentially increased from the edge of the display substrate to the inner part of the display substrate; the edge region (500) further comprises a first flat layer (20) covering the step structure, and the edge of the first flat layer (20) is flush with the edge of the flexible substrate (10). A preparation method of the display substrate, a display mother board and a display device are also provided.)