Display Panel Gate Driving Circuit Segmentation and Shielding
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Solution Overview
Problem
Current display technologies face challenges in efficiently integrating gate driving circuits within display panels to minimize bezel size and simplify manufacturing processes while maintaining display quality.
Innovation Solution
The display panel design incorporates a gate driving circuit with cascaded shift registers, power supply signal lines, and light-shielding portions, where each pixel area is accompanied by two gate driving circuit areas, and power supply signal lines are strategically positioned to optimize space usage and reduce complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If gate driving circuit is integrated in display panel, then bezel size is reduced and manufacturing process is simplified, but device complexity increases
Solution Approach 1:
The gate driving circuit is divided into multiple shift registers that are cascaded together, with each shift register disposed in separate gate driving circuit areas. This segmentation allows the circuit to be integrated into the display panel while maintaining manageable complexity through modular design.
Solution Approach 2:
The patent utilizes the second direction (row direction) by disposing power supply signal lines on sides of columns of pixel areas, and places transistor groups between pixel light-emitting sub-areas in the first direction. This multi-dimensional layout optimizes space utilization and reduces complexity of signal routing.
2Reliability
If power supply signal lines are positioned in gate driving circuit areas, then electrical leakage is reduced, but space utilization becomes constrained
Solution Approach 1:
Light-shielding portions are selectively disposed in gate driving circuit areas where transistor groups are located, rather than uniformly across the entire display panel. This localized approach reduces electrical leakage in critical areas while preserving space utilization in other regions.
Solution Approach 2:
Light-shielding portions serve as intermediary structures that are electrically connected to power supply signal lines and disposed on peripheries of transistor groups. These intermediaries provide electrical isolation to prevent leakage while occupying minimal space.
3Reliability
If light-shielding portions are added to reduce electrical leakage, then reliability improves, but device complexity increases
Solution Approach 1:
The light-shielding portions are merged with existing structural elements in the display panel, such as being disposed on peripheries of transistor groups and electrically connected to power supply signal lines. This integration approach reduces reliability issues without significantly increasing overall device complexity.
Solution Approach 2:
The light-shielding portions serve multiple functions: they provide electrical isolation to prevent leakage, act as structural support elements, and can be integrated with existing circuit layouts. This multi-functionality improves reliability without proportionally increasing complexity.
Data Source
AI summary
A display panel has a display area including a plurality of pixel areas arranged in an array and a plurality of gate driving circuit areas. Each pixel area includes a pixel light-emitting sub-area and a pixel circuit sub-area arranged in a first direction. Pixel areas in each row correspond to at least two gate driving circuit areas each located between two adjacent pixel areas in this row. The display panel includes a gate driving circuit and a plurality of light-shielding portions. The gate driving circuit includes a plurality of shift registers that are cascaded. Each shift register includes a plurality of transistor groups, and each transistor group includes at least one transistor. Each light-shielding portion is located in a gate driving circuit area in which a transistor group is disposed, and is disposed on a periphery of the transistor group, and is electrically connected to a power supply signal line.