Display panel, manufacturing method thereof, and display device

A manufacturing method of a display panel, comprising the following steps:

• providing a lower substrate having data lines and an upper substrate;
• forming at least one via hole on the upper substrate;
• forming a metal layer in the at least one via hole, the metal layer extending from a sidewall of the via hole to an upper side and a lower side of the upper substrate;
• forming a first electrode layer on a side of the upper substrate by magnetron sputtering, vacuum evaporation, or inkjet printing;
• forming a second electrode layer on a side of the upper substrate away from the first electrode layer by magnetron sputtering, vacuum evaporation, or inkjet printing, wherein the first electrode layer and the second electrode layer are electrically connected to each other through the metal layer, and each of the first electrode layer and the second electrode layer extends into a display area of the display panel;
• and
• arranging the upper substrate and the lower substrate opposite to each other, and filling a liquid crystal layer between the lower substrate and the upper substrate,
• wherein a thickness of the metal layer is greater than a thickness of the upper substrate, and a thickness of the metal layer on the upper side of the upper substrate and a thickness of the metal layer on the lower side of the upper substrate are respectivelysmaller than that of the first electrode layer and the second electrode layer.

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

• a lower substrate having data lines;
• an upper substrate arranged opposite to the lower substrate;
• a liquid crystal layer filled between the lower substrate and the upper substrate;
• a first electrode layer disposed on a side of the upper substrate awayfrom the liquid crystal layer;
• and
• a second electrode layer disposed on a side of the upper substrate awayfrom the first electrode layer,
• wherein the upper substrate comprises at least one via hole, a metal layer is located in the at least one via hole and extends from a sidewall of the via hole toan upper side and a lower side of the upper substrate, a thickness of the metal layer is greater than a thickness of the upper substrate, and a thickness of the metal layer on the upper side of the upper substrate and a thickness of the metal layer on the lower side of the upper substrate are respectively smaller than that of the first electrode layer and the second electrode layer, and
• the first electrode layer and the second electrode layer are electrically connected to each other through the metal layer, and each of the first electrode layer and the second electrode layer extends into a display area of the display panel.