Display Substrate Gate Drive Layout for Narrow-Bezel Cut Displays
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Solution Overview
Problem
Abnormal cut display devices with bulky bezels negatively impact the appearance and user experience due to inconsistent gate drive signal requirements across different regions of the display area.
Innovation Solution
A display substrate design that includes a circuit structure layer with misaligned first and second circuit areas, each containing cascaded gate drive circuits, and signal lines that extend in different directions to accommodate various pixel circuit densities, ensuring consistent signal transmission and reducing bezel size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If gate drive circuits are arranged in a single linear sequence, then the circuit layout is simple, but the bezel size becomes bulky and appearance is degraded
Solution Approach 1:
The gate drive circuit is divided into multiple independent circuit areas (first circuit area, second circuit area, third circuit area) that are spatially separated and misaligned. Each circuit area contains its own gate drive units arranged in sequences, allowing the overall circuit to be segmented across different regions of the display area rather than occupying a single continuous linear path, thus reducing bezel size while maintaining functionality
Solution Approach 2:
The circuit areas are arranged in a two-dimensional misaligned configuration rather than a one-dimensional linear sequence. The first, second, and third circuit areas are positioned at different locations and orientations within the display area, utilizing spatial dimensions more efficiently to reduce the required bezel area while maintaining signal transmission pathways
2Shape
If gate drive circuits are misaligned in multiple areas, then the bezel size is reduced, but the signal transmission complexity increases
Solution Approach 1:
Signal transmission lines are introduced as intermediary elements to connect the misaligned first, second, and third circuit areas. These signal lines serve as mediators that bridge the spatial gaps between circuit areas, enabling signal transmission across the misaligned configuration without requiring direct physical adjacency, thus managing the complexity of distributed circuit arrangement
Solution Approach 2:
The signal transmission lines are designed to perform multiple functions: they connect different circuit areas, transmit gate drive signals, and accommodate the misaligned spatial arrangement. This multi-functionality reduces the need for separate dedicated connection structures, thereby managing overall system complexity despite the distributed circuit configuration
3Productivity
If circuit areas are arranged sequentially in one direction, then the signal transmission is straightforward, but the display area utilization is inefficient
Solution Approach 1:
The first, second, and third circuit areas are arranged in an asymmetric misaligned configuration rather than a symmetric sequential arrangement. This asymmetric layout optimizes the utilization of available display area by positioning circuit areas in non-uniform locations and orientations, allowing more efficient packing of functional elements within the display region while accommodating varied signal transmission pathways
Data Source
AI summary
A display substrate includes an underlayer substrate and a circuit structure layer. The circuit structure layer is located in a display area of the underlayer substrate. The circuit structure layer includes at least one first circuit area and at least one second circuit area. The first circuit area includes at least one first gate drive circuit; the second circuit area includes at least one second gate drive circuit. The first gate drive circuit is cascaded with the second gate drive circuit. The first gate drive circuit includes a plurality of cascaded first gate drive units, and the second gate drive circuit includes a plurality of cascaded second gate drive units. A plurality of first gate drive units are sequentially arranged in a second direction, and a plurality of second gate drive units are sequentially arranged in the second direction.