Display Pixel and Driving Line Layout for Lower Parasitic Capacitance
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Solution Overview
Problem
Existing display devices face challenges in reducing non-display areas and improving image quality due to parasitic capacitance between pixel electrodes and driving lines, leading to characteristic deviations in pixel performance.
Innovation Solution
The display device design includes spaced and non-overlapping first electrodes of sub-pixels and driving lines, with driving elements positioned between pixels, reducing parasitic capacitance and minimizing the non-display area by integrating driving circuits within the display area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If driving lines are disposed close to pixel electrodes to reduce non-display area, then the non-display area is reduced, but parasitic capacitance between pixel electrodes and driving lines increases causing characteristic deviations
Solution Approach 1:
The patent extracts the driving lines from the display area by disposing them in the non-display area. Specifically, the driving lines are routed through regions that do not overlap with pixel electrodes in plan view, separating the driving circuitry from the pixel array. This extraction eliminates parasitic capacitance between driving lines and pixel electrodes while maintaining compact device layout.
Solution Approach 2:
The patent utilizes the third dimension (vertical stacking) to resolve the spatial conflict between driving lines and pixel electrodes. By configuring driving lines to extend in a direction substantially perpendicular to the pixel array plane and positioning them in the non-display area, the design achieves three-dimensional separation that eliminates parasitic capacitance while minimizing the non-display area footprint.
2Area of stationary object
If driving elements are disposed within the display area to minimize non-display area, then the non-display area is reduced, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent segments the display device into distinct functional regions: a display area containing pixel arrays and a non-display area containing driving circuits. This segmentation allows independent optimization of each region, simplifying manufacturing processes and reducing device complexity while effectively utilizing the non-display area for driving element placement.
3Area of stationary object
If driving lines overlap with pixel electrodes to reduce non-display area, then the non-display area is reduced, but parasitic capacitance increases causing image quality degradation
Solution Approach 1:
The patent extracts driving lines from the display area and positions them exclusively in the non-display area. This extraction ensures that driving lines do not overlap with pixel electrodes in plan view, eliminating parasitic capacitance effects that would degrade image quality, while still achieving compact device design by utilizing the non-display area effectively.
Data Source
AI summary
A display device includes pixels including a first pixel and a second pixel sequentially disposed in a first direction, each including sub-pixels including a first electrode, a second electrode, and a light emitting element, a driving circuit including driving elements between the pixels, pixel lines connected to the pixels, and driving lines connected to the driving elements. The driving lines are in an area between the first pixel and the second pixel, and include a first driving line extending in a second direction intersecting the first direction in the area between the first pixel and the second pixel. First electrodes included in the sub-pixels of the first pixel and first electrodes included in the sub-pixels of the second pixel are spaced apart by a distance equal to or greater than a width of the first driving line in the first direction, and do not overlap the first driving line.