Display Device Gate Connection Routing Through Inter-Element Regions
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Solution Overview
Problem
Existing display devices have a large width of flexible printed circuit boards due to the size of the region connecting the display substrate and the flexible printed circuit board, especially when control signals are supplied to multiple source drive circuit elements, leading to design constraints and increased size.
Innovation Solution
The display device incorporates a configuration where connection lines pass through inter-element regions between source drive circuit elements on the display substrate, with terminals positioned to face these regions, reducing the width of the flexible printed circuit board by optimizing the layout of gate and source drive circuit elements and their connection lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If control signals are supplied to multiple source drive circuit elements and gate drivers from the flexible printed circuit board, then the display device achieves proper driving control, but the width of the flexible printed circuit board becomes large
Solution Approach 1:
The connection lines are routed to pass through the inter-element region between source drive circuit elements in the planar dimension, and terminals are positioned to face these regions. This spatial arrangement in the planar layout allows connection lines to reach gate drive circuits without increasing the width of the flexible printed circuit board, effectively utilizing the available space in another dimension.
Solution Approach 2:
The display substrate is divided into distinct functional regions: display region, inter-element regions between source drive circuit elements, and mounting regions. Connection lines are specifically routed through inter-element regions to reach gate drive circuits, while source drive circuit elements are mounted in mounting regions. This segmentation allows optimized signal routing that minimizes the flexible printed circuit board width.
2Reliability
If the region connecting the display substrate and flexible printed circuit board is made large to accommodate control signals, then signal supply is reliable, but the overall device size increases
Solution Approach 1:
Different regions of the display substrate are assigned different functions with optimized characteristics: inter-element regions are used for connection line routing to gate drive circuits, mounting regions are used for source drive circuit elements, and display region is used for thin-film transistors. This local optimization ensures reliable signal supply while minimizing the overall area required for connections.
3Length of stationary object
If connection lines are routed through inter-element regions and mounting regions, then the flexible printed circuit board width is reduced, but the layout complexity increases
Solution Approach 1:
The substrate is segmented into distinct regions (display region, inter-element regions, mounting regions) with clearly defined functions. Connection lines are confined to pass through inter-element regions, while source drive circuit elements are mounted in mounting regions. This segmentation provides a systematic framework that simplifies the routing process despite the reduced board width, making the layout more manageable rather than more complex.
Data Source
AI summary
A display device includes a display substrate, a plurality of source drive circuit elements, gate drive circuits, and a plurality of gate connection lines. The plurality of gate connection lines pass through inter-element regions between the source drive circuit elements in plan view, and pass through mounting regions. Gate terminals connected to the gate connection lines are formed at positions facing the inter-element regions in a direction from the inter-element regions toward an FPC (Y2 direction).