Touch Panel Sensing Spacers for Uniform Sensitivity
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Solution Overview
Problem
Conventional built-in touch panels have uniform sensing gaps, leading to low sensitivity in certain areas and a risk of transparent conductive layer damage from excessive user stress.
Innovation Solution
The touch panel incorporates sensing spacers of varying heights and sizes, fabricated using organic conductive materials and an inkjet process, to enhance sensitivity and prevent damage, with different sensing gaps and spacers distributed across the panel to address low-sensitive areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If uniform sensing gaps are used in the touch panel, then the manufacturing process is simple, but the touch sensitivity is low in certain areas
Solution Approach 1:
The patent applies local quality by varying the sensing gap size in different regions of the touch panel. Specifically, the sensing gap is made larger in peripheral areas and smaller in central areas, allowing each region to have optimized touch sensitivity according to its specific requirements rather than using a uniform gap throughout the entire panel.
2Device complexity
If uniform sensing gaps are used in the touch panel, then the structure is simple, but excessive user stress may damage the transparent conductive layer
Solution Approach 1:
The patent implements local quality by creating region-specific sensing gaps that adapt to different mechanical stress requirements. Larger sensing gaps in peripheral areas provide more tolerance for user stress, preventing damage to the transparent conductive layer, while smaller sensing gaps in central areas maintain high sensitivity where needed.
3Ease of operation
If larger sensing gaps are used to improve sensitivity, then touch sensitivity increases, but the risk of transparent conductive layer damage increases
Solution Approach 1:
The patent resolves this contradiction by applying local quality - larger sensing gaps are strategically placed only in peripheral areas where lower sensitivity is acceptable and stress is more concentrated, while smaller sensing gaps are used in central areas where high sensitivity is critical and damage risk is lower.
Solution Approach 2:
The patent applies segmentation by dividing the touch panel into different regions (central and peripheral areas) with different sensing gap characteristics. This segmentation allows each region to be optimized independently for its specific functional requirements, balancing sensitivity and damage risk across the entire panel.
Data Source
AI summary
A touch panel including a first substrate, a second substrate, a sealant, a liquid crystal layer, a main spacer, a first sensing spacer, a second sensing spacer, a first opposite electrode and a second opposite electrode is provided. The first substrate has a central area and a peripheral area. The second substrate is disposed opposite to the first substrate. The first sensing spacer is disposed on the central area and between the first and the second substrates. The second sensing spacer is disposed on the peripheral area and between the first and the second substrates. There's a first sensing gap between the first sensing spacer and the first opposite electrode disposed corresponding to the first sensing spacer. There's a second sensing gap between the second sensing spacer and the second opposite electrode disposed corresponding to the second sensing spacer. The first sensing gap is larger than the second sensing gap.