Touch Control Display Panel Pressure Sensing Bridge Arrangement
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Solution Overview
Problem
Touch control display panels with pressure-sensing bridges often have regions where pressing is not detectable, limiting their functionality in accurately measuring touch pressures across the entire surface.
Innovation Solution
The implementation of a touch control display panel design featuring multiple pressure-sensing bridges with strategically oriented strain directions and angles, ensuring comprehensive pressure detection by distributing the sensing capability across the non-display regions, with first and second pressure-sensing bridges positioned in opposing sub-non-display regions to cover all areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single pressure-sensing bridge is implemented in the touch control display panel, then the device complexity is reduced, but there are regions where pressing is not detectable
Solution Approach 1:
The non-display region is divided into multiple sub-non-display regions, with pressure-sensing bridges strategically placed in opposing sub-regions. This segmentation allows comprehensive coverage of the entire display surface while maintaining reasonable device complexity through targeted placement rather than uniform distribution.
Solution Approach 2:
Multiple pressure-sensing bridges are combined in opposing sub-non-display regions with their strain directions and angles carefully coordinated. This merging approach ensures that the collective sensing capability covers the entire display area, eliminating undetectable regions while optimizing the overall detection system.
2Measurement precision
If multiple pressure-sensing bridges with different orientations are used, then the measurement precision of touch pressure is improved, but the device complexity increases
Solution Approach 1:
Different sub-non-display regions are assigned different pressure-sensing bridge configurations with specific strain directions and angles. Each local region's sensing bridge is optimized for its specific position, ensuring high measurement precision for touch pressures in that area while contributing to overall comprehensive coverage.
Solution Approach 2:
Pressure-sensing bridges in opposing sub-non-display regions are configured with asymmetric strain directions and angles relative to the display region borders. This asymmetric configuration ensures that combined sensing from opposing bridges provides complete angular coverage, improving measurement precision across all touch positions.
3Measurement precision
If pressure-sensing bridges are positioned to cover all areas, then the detection resolution is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The non-display region is segmented into multiple sub-regions, distributing the positioning requirements across multiple locations rather than requiring one complex centrally-positioned sensor. This segmentation reduces the stringency of positioning precision for each individual pressure-sensing bridge while achieving comprehensive coverage collectively.
Solution Approach 2:
Opposing sub-non-display regions are positioned symmetrically with respect to the display region, creating equipotential conditions where positioning errors in one region are compensated by corresponding errors in the opposing region. This symmetry reduces the impact of manufacturing precision variations on overall detection accuracy.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design enhances the sensitivity and detection resolution of pressure signals, ensuring no region on the touch control display panel is undetectable, thereby improving the overall touch pressure measurement accuracy and user interaction experience.
Implementation Method 1
a first pressure-sensing bridge and at least one second pressure-sensing bridge each includes a first strain direction and a second strain direction
Data Source
AI summary
A touch control display panel and a touch control display apparatus are provided. The touch control display panel comprises a first substrate having a display region and a non-display region surrounding the display region, wherein the non-display region includes a plurality of sub-non-display regions, and a plurality of first pressure-sensing bridges and at least one second pressure-sensing bridge, wherein a first pressure-sensing bridge and the at least one second pressure-sensing bridge are disposed in two opposing sub-non-display regions. The first pressure-sensing bridge and the at least one second pressure-sensing bridge each includes a first strain direction and a second strain direction. The first strain direction and the second strain direction of the first pressure-sensing bridge form a first pre-determined angle α and a second pre-determined angle β with respect to a first border of the non-display region, respectively.