Stacked Pixel Capacitor Structure for Stable OLED Image Quality

The patent implements a nested capacitor structure where a first capacitor electrode and second capacitor electrode are positioned at different layers with overlapping regions, creating a three-dimensional capacitor configuration. This nesting approach increases the effective capacitor capacity without proportionally increasing the planar area, thereby improving image quality while controlling device complexity.

The patent transitions from a two-dimensional capacitor layout to a three-dimensional structure by stacking capacitor electrodes at different layers. The first capacitor electrode is disposed at a first layer while the second capacitor electrode is disposed at a second layer, with their overlapping regions forming the capacitor active area. This dimensional change increases capacitor capacity without linearly increasing the device footprint.

By nesting capacitor electrodes in multiple layers with overlapping regions, the patent achieves increased voltage storage capability within a compact footprint. The first capacitor electrode at the first layer and second capacitor electrode at the second layer create an effective capacitor volume that provides enhanced capacitance without requiring proportional increases in planar device area.

The patent utilizes the vertical dimension by stacking capacitor electrodes at different layers instead of expanding horizontally. This approach allows the capacitor to store more voltage while maintaining a compact device area, as the increased capacitance is achieved through vertical stacking and overlapping regions rather than lateral expansion.

The patent segments the capacitor structure into distinct layers with the first capacitor electrode at the first layer and the second capacitor electrode at the second layer. This segmentation allows for systematic manufacturing where each layer can be processed and aligned independently, facilitating the integration of multiple electrodes while managing manufacturing complexity through modular construction.

The overlapping regions between the first and second capacitor electrodes serve multiple functions: they create the capacitor active area for voltage storage, provide electrical connection pathways, and establish the three-dimensional capacitor structure. This multi-functionality reduces the need for additional separate components or processes, thereby improving voltage maintenance capability while limiting the increase in manufacturing complexity.