Driver board, display panel

A display panel, comprising a driver board and a light source, the driver board further comprises:

• a substrate;
• a metal oxide semiconductor active layer;
• a gate layer, arranged on the side of the metal oxide semiconductor active layer away from the substrate;
• a first protective layer, covered the gate layer, wherein the material of the first protective layer is metal oxide semiconductor, and the oxygen content of the first protective layer is greater than the oxygen content of the metal oxide semiconductor active layer;
• a source-drain layer and a second protective layer, wherein the source-drain layer is arranged on the side of the first protection layer away from the gate layer, the second protective layer covers the source-drain layer, the material of the second protective layer is metal oxide semiconductor, and the oxygen content of the second protective layer is greater than the oxygen content of the metal oxide semiconductor active layer;
• and
• a third protective layer and a passivation layer, wherein the passivation layer is arranged on the side of the second protection layer away from the source-drain layers, the third protective layer covers the passivation layer, and the oxygen content of the third protective layer is greater than the oxygen content of the metal oxide semiconductor active layer,
• wherein the third protective layer comprises a first protective sublayer, a second protective sublayer, and a third protective sublayer that are stacked, wherein the materials of the first protective sublayer and the third protective sublayer are metal oxide semiconductors, the oxygen content of the first protective sublayer and the third protective sublayer is greater than the oxygen content of the metal oxide semiconductor active layer, and the material of the second protective sublayer is an inorganic material.