Array Substrate Touch Line Layout for Large-Panel Aperture Ratio
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Solution Overview
Problem
In large-size touch panels, the arrangement of touch signal lines and their connection to control units is challenging due to limited space and high density of touch sensor blocks, leading to difficulties in achieving efficient touch operation and display performance.
Innovation Solution
The array substrate design includes two groups of touch signal lines arranged in a specific pattern, with each group coupled to corresponding control units, allowing for reduced space requirements and improved aperture ratio, and incorporating electrostatic protection distances to prevent short circuits and ensure reliable touch and display performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If touch signal lines are arranged densely to connect all touch sensor blocks in large-size touch panels, then the coverage and connectivity are improved, but the space between lines decreases leading to increased risk of short circuits and reduced aperture ratio
Solution Approach 1:
The touch signal lines are divided into first and second groups, with each group connected to separate first and second control units. This segmentation allows independent control and reduces interference between adjacent lines, enabling denser arrangement while maintaining reliability through electrostatic protection distances within each group.
Solution Approach 2:
The patent introduces a first direction for arranging touch sensor blocks and a second direction for arranging touch signal lines, creating a crossed grid pattern. This dimensional arrangement optimizes space utilization, allows electrostatic protection distances to be applied effectively in the first direction, and maintains good aperture ratio by distributing lines across different directions.
2Reliability
If electrostatic protection distance is increased to prevent short circuits between touch signal lines, then reliability is improved, but the space occupied by protection distances increases reducing the aperture ratio
Solution Approach 1:
By dividing touch signal lines into separate groups connected to different control units, the patent localizes electrostatic protection requirements within each group rather than requiring protection across the entire array. This allows electrostatic protection distances to be applied selectively, reducing overall space consumption while maintaining reliability.
Solution Approach 2:
The electrostatic protection distance is applied locally between specific groups of touch signal lines that are adjacent in the first direction, rather than uniformly across all lines. This localized approach provides necessary protection where needed while minimizing impact on aperture ratio in other regions.
3Productivity
If more touch sensor blocks are arranged in the first direction to increase touch detection capability, then the touch functionality is improved, but the arrangement complexity and difficulty of connecting to control units increases
Solution Approach 1:
The patent divides the touch sensor blocks into first and second groups arranged in the first direction, with each group connected to separate control units via dedicated touch signal lines. This segmentation reduces the complexity of connecting all blocks to a single control unit while maintaining full touch detection capability across the entire array.
Data Source
AI summary
An array substrate and a touch display device are provided. In the array substrate, a first control unit and a second control unit are arranged opposite to each other in a first direction. A plurality of touch sensor blocks includes a first group of electrode blocks and a second group of electrode blocks arranged in the first direction, and a plurality of touch signal lines includes a first group of touch signal lines and a second group of touch signal lines arranged in the first direction. The touch signal lines in the first group of touch signal lines are coupled to the touch sensor blocks in the first group of electrode blocks respectively; and the touch signal lines in the second group of touch signal lines are coupled to the touch sensor blocks in the second group of electrode blocks respectively.