Driving substrate and manufacturing method thereof and display device

A driving substrate, comprising:

• a flexible substrate base, a plurality of thin film transistors on the flexible substrate base and a first conductive pattern layer on a side of the plurality of thin film transistors distal to the flexible substrate base;
• wherein
• the flexible substrate base comprises:
• a display region, a bendable region and a bonding region, the bendable region is between the display region and the bonding region, and the plurality of thin film transistors are in the display region;
• the first conductive pattern layer comprises:
• a plurality of first connection terminals and a plurality of signal supply lines, the plurality of first connection terminals are in the display region, a first number of first connection terminals of the plurality of first connection terminals are electrically coupled to first electrodes of the plurality of thin film transistors respectively, the plurality of signal supply lines are in the bendable region, two ends of each of the plurality of signal supply lines extend into the display region and the bonding region respectively, and the plurality of signal supply lines are electrically coupled to a second number of first connection terminals other than the first number of first connection terminals of the plurality of first connection terminals in the display region;
• and
• at least one inorganic insulating layer is between the first conductive pattern layer and the flexible substrate base, and the at least one inorganic insulating layer comprises a hollowed-out pattern in the bendable region.