Bent Connection Lines in Scan Drivers for Signal Matching
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Solution Overview
Problem
Existing display devices face challenges in efficiently compensating for distance differences between clock lines and stages in scan drivers, leading to potential signal delays and inefficiencies in image generation.
Innovation Solution
The implementation of a scan driver with first and second clock lines and corresponding connection lines that include bent portions to overlap and compensate for distance differences, ensuring optimal signal transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If straight connection lines are used to connect clock lines with stages, then the structure is simple, but distance differences cause signal delays and reduced transmission efficiency
Solution Approach 1:
The connection lines include bent portions with specific curvature radii that are equal to or greater than half the spacing between adjacent signal lines. This curvature design allows the connection lines to overlap with signal lines, effectively compensating for distance differences between clock lines and stages, thereby reducing signal delays while maintaining structural feasibility
Solution Approach 2:
Different connection lines have different bent portion configurations tailored to their specific distance differences. The bent portions are strategically positioned to overlap with signal lines, creating localized compensation zones that address the specific spatial relationships of each clock line to its corresponding stage
2Reliability
If connection lines are extended to compensate for distance differences, then signal transmission is improved, but resistance differences increase
Solution Approach 1:
The bent portions act as intermediary structures that enable connection lines to overlap with signal lines. This overlapping configuration serves as a mediator that simultaneously achieves distance compensation and resistance balancing, as the bent portions are designed with specific curvature radii that optimize both spatial and electrical characteristics
Solution Approach 2:
The connection lines use parameter changes in their geometric configuration (curvature radius, bending direction, overlap position) to achieve multiple objectives. By adjusting these geometric parameters, the design simultaneously compensates for distance differences and controls resistance variations, improving signal transmission quality without excessive resistance increase
Data Source
AI summary
A scan driver includes a plurality of stages sequentially outputting scan signals, signal lines disposed proximate to the stages and extended in a first direction to provide an input signal, first clock lines disposed proximate to the signal lines and extended in the first direction to provide a first clock signal, and first connection lines extended in a second direction intersecting the first direction and electrically connecting the first clock lines with the stages. The first connection lines include a bent portion that overlaps at least some of the signal lines and compensates for a distance difference between the first clock lines and the stages.