Patent ID: 11925066
Assignee: LG DISPLAY CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 8:
9. A display device comprising:
a substrate including an active area and a bending area;
a first thin film transistor on the active area of the substrate, the first thin film transistor including a first semiconductor layer;
a second thin film transistor spaced away from the first thin film transistor in the active area of the substrate, the second thin film transistor including a second semiconductor layer;
an upper interlayer dielectric film on the first semiconductor layer and the second semiconductor layer;
a first planarization layer on the upper interlayer dielectric film, the first planarization layer extending to the bending area of the substrate;
a pixel connection electrode on the first planarization layer in active area, the pixel connection electrode electrically connected to the second thin film transistor;
a second planarization layer on the first planarization layer, the second planarization layer covering the pixel connection electrode;
an organic light-emitting device including an anode electrode connected to the pixel connection electrode, a light-emitting stack on the anode electrode, and a cathode electrode on the light-emitting stack; and
a signal link between the first planarization layer and the second planarization layer in the bending area, the signal link including a same material as the pixel connection electrode,
wherein the first thin film transistor further includes a first source electrode and a first drain electrode that are between the upper interlayer dielectric film and the first planarization layer,
wherein the second thin film transistor further includes a second source electrode and a second drain electrode that are between the upper interlayer dielectric film and the first planarization layer,
wherein the upper interlayer dielectric film includes a first source contact hole between the first semiconductor layer and the first source electrode, a first drain contact hole between the first semiconductor layer and the first drain electrode, a second source contact hole between the second semiconductor layer and the second source electrode, and a second drain contact hole between the second semiconductor layer and the second drain electrode, and
wherein the second source electrode and the second drain electrode are disposed on a same layer as the first source electrode and the first drain electrode.