OLED Panel Frame Layout With Overlapped VSS Trace and Gate Circuit
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing OLED display panels have a wide frame area due to the width requirements of cathode traces and gate driving circuits, which increases the overall panel width and affects signal transmission quality.
Innovation Solution
A display panel design where the first trace, used for VSS signal transmission, is partially overlapped with the gate driving circuit in the frame area, allowing it to occupy the space typically used by the gate driving circuit, thereby reducing resistance and maintaining a narrower frame width while ensuring signal quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the cathode trace width is increased to ensure signal transmission quality, then the signal transmission quality is improved, but the frame area width increases
Solution Approach 1:
The patent merges the cathode trace and gate driving circuit by making them overlap in the frame area. The cathode trace is positioned to overlap with the gate driving circuit, allowing the trace to utilize the space occupied by the circuit. This merging enables the cathode trace to achieve sufficient width for signal transmission quality without increasing the overall frame area width, as both structures share the same spatial footprint.
2Device complexity
If the cathode trace and gate driving circuit are formed in film sharing manner to reduce masks, then the manufacturing complexity is reduced, but the frame area width increases
Solution Approach 1:
The patent applies film sharing to form both the cathode trace and gate driving circuit using the same material layer and processing steps. By merging these structures into a single film formation process, the number of masks is reduced, and the frame area width is maintained narrow through the overlapping arrangement of the trace and circuit.
Solution Approach 2:
The patent resolves the space conflict by transitioning from a two-dimensional side-by-side arrangement to a three-dimensional overlapping arrangement. The cathode trace and gate driving circuit are positioned to overlap in the vertical dimension (through different z-heights or layer stacking), allowing both structures to coexist in the same planar footprint without increasing the frame area width.
Data Source
AI summary
A display panel and a display device are provided. The display panel includes a substrate; a light-shielding metal layer disposed on a side of the substrate, wherein the light-shielding metal layer includes a first trace disposed in a frame area; a driving circuit layer disposed on a side of the light-shielding metal layer away from the substrate, wherein the driving circuit layer includes a pixel driving circuit disposed in the display area and a gate driving circuit disposed in the frame area; a first electrode disposed on a side of the driving circuit layer away from the substrate; a light-emitting layer disposed on a side of the first electrode away from the substrate; and a second electrode disposed on a side of the light-emitting layer away from the substrate, wherein the first trace and the gate driving circuit are at least partially overlapped.