Adaptive Touch Panel Sensor Group Segmentation
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Solution Overview
Problem
Touch display devices face challenges in reducing the number of signal lines and touch channels, leading to increased complexity and cost in manufacturing, while also experiencing a 'ghost phenomenon' where multiple touches are misinterpreted due to the complexity of existing touch panel configurations.
Innovation Solution
The implementation of a touch panel with multiple touch sensor groups, each comprising a specific arrangement of electrodes and signal lines, allows for adaptive selection between self-capacitance and mutual-capacitance sensing schemes based on touch events, reducing the number of signal lines and touch channels and minimizing the ghost phenomenon.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a typical touch panel with complex configuration and multi-layered sensing stack is used, then touch sensing function is achieved, but manufacturing process becomes complicated, production yield decreases, and manufacturing cost increases
Solution Approach 1:
The touch panel is divided into multiple touch sensor groups, each with a simplified structure containing a specific number of electrodes and signal lines. This segmentation allows each group to be manufactured independently with simpler processes, reducing overall manufacturing complexity while maintaining comprehensive touch sensing coverage across the display panel.
Solution Approach 2:
The touch sensor groups use a standardized configuration where each group contains the same number of electrodes and signal lines, allowing the same manufacturing process to be applied universally across all groups. This multi-functionality approach simplifies production by using repeated modular units rather than customizing each section differently.
2Area of stationary object
If the size of the touch panel increases, then display area is enlarged, but the number of touch electrodes, signal lines, and touch channels increases, resulting in increased manufacturing complexity and cost
Solution Approach 1:
The enlarged touch panel is segmented into multiple identical touch sensor groups arranged in a grid pattern. Each group handles a specific portion of the display area, allowing the overall panel size to be increased without proportionally increasing the complexity of individual components. The modular structure enables scalable expansion while maintaining manageable component counts per group.
3Reliability
If a typical touch panel configuration is used, then touch detection is achieved, but ghost phenomenon occurs when multi-touch input is detected, reducing reliability
Solution Approach 1:
By dividing the touch panel into separate touch sensor groups with isolated electrodes and signal lines, the segmentation prevents cross-contamination of touch signals between different regions. This isolation eliminates the ghost phenomenon where touches in different areas interfere with each other, as each group processes touch inputs independently without causing false detections in adjacent areas.
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 approach reduces manufacturing complexity and cost by minimizing the number of signal lines and touch channels, while effectively distinguishing actual touch points from false ones, enhancing the accuracy of touch sensing.
Implementation Method 1
enabling one of a self-capacitance touch sensing scheme and a mutual-capacitance touch sensing scheme adaptively to be implemented according to the type and position of a touch event
Implementation Method 2
enabling one of a self-capacitance touch sensing scheme and a mutual-capacitance touch sensing scheme adaptively to be implemented according to the type and position of a touch event
Data Source
AI summary
The present disclosure relates to a touch display device, a touch panel, a touch sensing circuit and a touch sensing method. In the touch display device, the touch panel, and the touch sensing circuit, and in the method of performing touch sensing therein, a structure in which a plurality of touch sensor groups is arranged is provided, and one of a self-capacitance touch sensing scheme and a mutual-capacitance touch sensing scheme is adaptively implemented according to the type and position of a touch event. Therefore, the number of signal lines and the number of touch channels may be reduced, and the ghost phenomenon can be reduced or be overcome when multiple touches occur.