阅读说明：本技术 驱动背板及其制备方法、显示面板、显示装置 (Driving backboard, manufacturing method thereof, display panel and display device ) 是由 杨维 王珂 狄沐昕 于 2020-01-22 设计创作，主要内容包括：一种驱动背板及其制备方法、显示面板、显示装置,目的是改善TPV驱动背板结构,提高TPV驱动背板良率。驱动背板包括:柔性衬底(1),设有第一过孔(11)；第一钝化层(21),位于柔性衬底(1)一侧,设有第二过孔(211),第二过孔(211)的正投影与第一过孔(11)的正投影至少部分重叠；薄膜晶体管(3),位于柔性衬底(1)背离第一钝化层(21)的一侧；电连接结构,包括信号走线和连接端子(41)；连接端子(41)位于柔性衬底(1)靠近第一钝化层(21)的一侧,包括位于柔性衬底(1)和第一钝化层(21)之间的第一部分(411)以及位于第二过孔(211)内的第二部分(412),且第二过孔(211)的正投影位于连接端子(41)的正投影内；信号走线位于柔性衬底(1)背离第一钝化层(21)的一侧,与薄膜晶体管(3)电连接、且通过第一过孔(11)与连接端子(41)电连接。(A driving backboard, a manufacturing method thereof, a display panel and a display device aim to improve the structure of a TPV driving backboard and improve the yield of the TPV driving backboard. The driving back plate comprises a flexible substrate (1) provided with a first via hole (11); the first passivation layer (21) is positioned on one side of the flexible substrate (1) and is provided with a second through hole (211), and the orthographic projection of the second through hole (211) is at least partially overlapped with the orthographic projection of the first through hole (11); a thin film transistor (3) located on a side of the flexible substrate (1) facing away from the first passivation layer (21); an electrical connection structure including signal traces and connection terminals (41); the connecting terminal (41) is positioned on one side of the flexible substrate (1) close to the first passivation layer (21), and comprises a first part (411) positioned between the flexible substrate (1) and the first passivation layer (21) and a second part (412) positioned in the second through hole (211), and the orthographic projection of the second through hole (211) is positioned in the orthographic projection of the connecting terminal (41); the signal routing is located on one side, away from the first passivation layer (21), of the flexible substrate (1), is electrically connected with the thin film transistor (3) and is electrically connected with the connecting terminal (41) through the first through hole (11).)