Display Panel Gate Driver Overlap Layout for Narrow Bezel
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Solution Overview
Problem
Existing display apparatuses have a significant dead area (peripheral area) that reduces the effective display area and the performance of pixel circuits is not optimized.
Innovation Solution
The display apparatus is designed with a substrate that includes a first layer with a gate driving circuit and a second layer with a metal layer overlapping each other, and a pixel circuit layer with transistors, where the metal layer maintains a constant voltage level and is connected to a driving voltage, reducing the dead area and enhancing pixel circuit performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the gate driving circuit is disposed separately from the display area, then the circuit performance is stable, but the dead area increases and display area is reduced
Solution Approach 1:
The patent merges the gate driving circuit with the display area by disposing the metal layer overlapping both the gate driving circuit and the display area. This integration eliminates the need for separate circuit boards or peripheral areas, thereby reducing dead area while maintaining circuit functionality through the shared metal layer structure.
Solution Approach 2:
The patent utilizes vertical layering (another dimension) to resolve the spatial conflict between the gate driving circuit and display area. By stacking the metal layer, gate driving circuit, and display area in different layers rather than placing them side-by-side in the same plane, the design achieves both compact integration and functional separation.
2Area of stationary object
If the metal layer is extended to overlap the display area, then the dead area is reduced, but the voltage stability may be affected
Solution Approach 1:
The patent applies local quality by giving different regions of the metal layer different functions: the portion overlapping the gate driving circuit serves as a voltage reference, while the portion overlapping the display area contributes to reducing dead area. This localized functional differentiation maintains voltage stability while achieving area reduction.
Solution Approach 2:
The metal layer is configured to maintain a substantially constant voltage level across its entire surface, creating an equipotential structure. This equipotentiality ensures that extending the metal layer into the display area does not compromise voltage stability, as the entire layer remains at the same potential.
Data Source
AI summary
A display apparatus including a display area and a peripheral area includes a substrate, a first layer disposed on the substrate and including a gate driving circuit including a first transistor, a second layer disposed on the first layer and including a metal layer, and a pixel circuit layer disposed on the second layer and including a plurality of pixel circuits each including a second transistor, wherein, in a plan view, the metal layer and the gate driving circuit overlap each other.