Organic light-emitting diode display panels

A display, comprising:

• a substrate having a peripheral edge;
• thin-film transistor circuitry on the substrate that is configured to form pixels, wherein the thin-film transistor circuitry includes a first inorganic dielectric layer;
• thin-film encapsulation that covers the thin-film transistor circuitry, wherein the thin-film encapsulation includes at least a second inorganic dielectric layer;
• and
• a line of crack-stopper structures that surrounds the pixels, wherein the line of crack stopper structures comprises a plurality of parallel polymer lines that are overlapped by the second inorganic dielectric layer, wherein the second inorganic dielectric layer has a first density in regions overlapping the polymer lines and a second density that is less than the first density in regions interposed between each of the polymer lines.

A display, comprising:

• a substrate having a peripheral edge;
• thin-film circuitry on the substrate that is configured to form pixels, wherein the thin-film circuitry includes a first inorganic dielectric layer and includes an organic layer that overlaps the first inorganic dielectric layer;
• thin-film encapsulation that covers the thin-film circuitry, wherein the thin-film encapsulation includes a second inorganic dielectric layer;
• and
• a crack-stopper structure that surrounds the pixels, wherein the crack stopper structure comprises parallel polymer lines that are overlapped by the second inorganic dielectric layer, wherein the polymer lines include first and second polymer lines, wherein the polymer lines each have a first surface and a second surface and a first width from the first surface to the second surface, wherein the polymer lines are separated from each other by a gap that extends from a first surface of the first polymer line to the second surface of the second polymer line and wherein the gap has a second width that is less than the first width.