Display panel and display device for IVL testing

A display device, comprising a display panel, wherein the display panel comprises:

• a silicon-based substrate, comprising a display region and a peripheral region surrounding the display region;
• a driving layer, formed in the silicon-based substrate, and comprising a plurality of first transistors located in the display region;
• a first electrode layer, disposed on a side of the driving layer away from the silicon-based substrate, and comprising a plurality of first electrodes located in the display region, wherein each of the first electrodes is electrically connected to each of the first transistors;
• an organic light emitting layer, disposed on a side of the first electrode layer away from the driving layer;
• a second electrode layer, disposed on a side of the organic light emitting layer away from the driving layer;
• and
• a plurality of pads, located in the peripheral region on at least one side of the display region, wherein the plurality of pads comprises a display signal access pad and a test signal access pad;
• the display signal access pad is arranged in a first direction, the display signal access pad comprises a first end portion and a second end portion in the first direction;
• the test signal access pad is located in a regions for the first end portion and the second end portion of the display signal access pad in the first direction;
• the test signal access pad comprises at least a first pad and a third pad, the first pad and the third pad do not overlap in the first direction;
• and the third pad overlaps with the display signal access pad in the first direction.