Multi-Chip Touch System Boundary Signal Management
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Solution Overview
Problem
Touch systems with large screens face inter-chip interference issues when using multiple chips for sensing, leading to noise problems and difficulties in data processing for boundary area sensing signals.
Innovation Solution
A touch system design that uses multiple chips to differentially amplify sensing signals and employs a switching circuit to manage sensing signals in boundary areas, sharing roles between chips to reduce interference and facilitate data processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple chips are used to sense divided areas of a large touchscreen panel, then the sensing capability and coverage area are improved, but inter-chip interference occurs in boundary areas leading to noise and data processing problems
Solution Approach 1:
The patent introduces a pad unit as an intermediary component that receives sensing signals from boundary sensing lines and shares them between adjacent chips. This mediator enables seamless signal transfer across chip boundaries without direct chip-to-chip interaction, thereby eliminating inter-chip interference while maintaining continuous sensing coverage across the entire large touchscreen panel.
Solution Approach 2:
The patent divides the large touchscreen panel into multiple divided areas, each sensed by a separate chip. This segmentation allows each chip to handle a manageable portion of the sensing task independently, reducing the complexity and interference between chips while collectively covering the entire large area through coordinated operation.
2Measurement precision
If multiple chips perform differential amplification simultaneously in divided areas, then the sensing precision is improved, but inter-chip interference causes noise in boundary area signals
Solution Approach 1:
The pad unit serves as an intermediary that receives sensing signals from boundary sensing lines and shares them between adjacent chips. This mediator enables seamless signal transfer across chip boundaries without direct chip-to-chip interaction, thereby eliminating inter-chip interference while maintaining continuous sensing coverage across the entire large touchscreen panel.
3Adaptability or versatility
If chips share sensing lines in boundary areas, then the coverage and sensing capability are improved, but data processing complexity increases due to inter-chip interference
Solution Approach 1:
The pad unit serves as an intermediary that receives sensing signals from boundary sensing lines and shares them between adjacent chips. This mediator enables seamless signal transfer across chip boundaries without direct chip-to-chip interaction, thereby eliminating inter-chip interference while maintaining continuous sensing coverage across the entire large touchscreen panel.
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
The system effectively drives and senses large touchscreen panels by minimizing inter-chip interference, enhancing data processing for boundary area signals and reducing chip burden, while ensuring flexibility in switch configurations.
Implementation Method 1
differentially amplify sensing signals of the adjacent sensing lines included in the areas, which correspond to the plurality of chips, and the boundary area adjacent to the areas
Data Source
AI summary
Disclosed are a touch system and a control method thereof. The touch system has a structure in which a plurality of chips correspond to a touchscreen panel having a large screen, wherein the touchscreen panel is divided into areas corresponding to chips and a boundary area between the areas, and each chip performs sensing such that noise is prevented from being generated by a sensing signal of a sensing line of the boundary area.