Shielding Electrodes for Touch-Display Signal Interference
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Solution Overview
Problem
In hybrid in-cell type mutual-capacitive touch-control structures, signal interference between adjacent touch-control driving electrodes reduces the signal-to-noise ratio and affects touch-control precision.
Innovation Solution
An integrated touch-control display panel is designed with a shielding structure comprising shielding electrodes disposed between adjacent touch-control driving electrodes on the array substrate, which reduces signal interference and coupling interference, improving the signal-to-noise ratio and touch-control precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If touch-control driving electrodes are disposed on the array substrate in a hybrid in-cell type mutual-capacitive structure, then the touch-control function is integrated into the display panel, but signal interference exists between adjacent touch-control driving electrodes, reducing the signal-to-noise ratio and affecting touch-control precision
Solution Approach 1:
A shielding structure comprising shielding electrodes is introduced as an intermediary element between adjacent touch-control driving electrodes. The shielding electrodes are disposed on the array substrate in specific patterns (such as between adjacent driving electrodes or in interleaved arrangements) to act as mediators that block or redirect electromagnetic interference signals, thereby protecting the touch-control driving electrodes from mutual interference while maintaining the integrated display and touch-control functions
2Device complexity
If touch-control driving electrodes are arranged in parallel along the data line direction, then the touch-control structure can be integrated into the display panel, but signal interference between adjacent electrodes increases, reducing the signal-to-noise ratio
Solution Approach 1:
The shielding electrodes serve as intermediary elements positioned between adjacent touch-control driving electrodes. These shielding electrodes are configured to intercept and redirect electromagnetic signals that would otherwise cause interference between neighboring driving electrodes, thereby reducing signal loss and improving the signal-to-noise ratio without requiring changes to the basic integrated structure
Solution Approach 2:
The shielding structure is selectively positioned in specific locations where interference is most problematic, such as between adjacent driving electrodes or in regions with high signal density. By applying shielding only where needed rather than uniformly across the entire display panel, the solution maintains structure integration while locally improving signal quality and reducing energy loss from interference
Data Source
AI summary
The present disclosure provides an integrated touch-control display panel and a touch-control display device. The integrated touch-control display panel includes a first substrate and a second substrate arranged opposite to the first substrate. The first substrate and the second substrate each includes a display region and a non-display region surrounding the display region. In the display region, a plurality of touch-control driving electrodes extending along the first direction and sequentially arranged along the second direction are disposed on the first substrate, and a plurality of touch-control sensing electrodes extending along the second direction and sequentially arranged along the first direction are disposed on the second substrate. The first direction is perpendicular to the second direction. A shielding structure is disposed between two adjacent touch-control driving electrodes. The shielding structure includes a plurality of first shielding electrodes extending along the first direction and arranged along the second direction.