Plural Touch-Screen Sensor Pen Synchronization Logic
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Solution Overview
Problem
Existing touch-screen systems with multiple sensors face challenges in seamless pen tracking across adjacent sensors, particularly at seams, due to conflicting synchronization requests from dedicated drivers, leading to imprecise and choppy tracking experiences.
Innovation Solution
A touch-screen system with coordinated operation of plural touch-screen drivers through pen-detection, pen-synchronization, and pen-tracking stages, using submission, synchronization, tracking, and return logic to synchronize and track pen position smoothly across multiple sensors, even with conflicting data from different drivers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple touch-screen sensors are used cooperatively to receive input over multiple display panels, then the coverage area and functionality are improved, but synchronization conflicts and tracking precision deteriorate at seams between sensors
Solution Approach 1:
The system divides the touch-screen input area into multiple independent sensor zones, each with its own digitizer processing pen signals locally. This segmentation allows each sensor to independently track the pen within its boundaries while the synchronization logic coordinates transitions between zones, maintaining precision across the entire expanded area.
Solution Approach 2:
A synchronization logic component acts as an intermediary between multiple digitizers and the operating system. This mediator receives pen signals from multiple sensors, resolves synchronization conflicts, determines which digitizer should actively track the pen at any given moment, and exposes unified tracking results to the OS, thereby maintaining precision across sensor boundaries.
2Reliability
If dedicated drivers are assigned to each touch-screen sensor, then sensor independence and reliability are improved, but synchronization conflicts and system complexity worsen
Solution Approach 1:
While maintaining dedicated drivers for each sensor to ensure independence and reliability, the system merges their coordination through a centralized synchronization logic. This logic consolidates the management of multiple digitizers, resolving conflicts and coordinating pen tracking across sensors, thereby reducing overall system complexity while preserving sensor independence.
Solution Approach 2:
The synchronization logic serves as an intermediary layer between independent dedicated drivers and the operating system. It allows each driver to maintain its independence and reliability while providing a unified interface for pen tracking, thereby managing system complexity without sacrificing sensor autonomy.
3Area of stationary object
If pen tracking is enabled by all digitizers simultaneously, then tracking coverage is improved, but tracking precision and smoothness worsen due to conflicting synchronization requests
Solution Approach 1:
The system dynamically enables or disables pen tracking for each digitizer based on real-time pen position and synchronization state. Instead of all digitizers tracking simultaneously, the synchronization logic determines which digitizer should actively track the pen at any given moment, creating a dynamic assignment that maintains smooth tracking across sensor boundaries while preserving comprehensive coverage.
Solution Approach 2:
The synchronization logic continuously monitors pen signals from multiple digitizers and uses feedback to determine which digitizer should actively track the pen. By analyzing synchronization requests and pen position data in real-time, the system adjusts tracking enablement dynamically, ensuring smooth and precise tracking across the entire multi-sensor area without conflicts.
Data Source
AI summary
A touch-screen system comprises adjacent first and second touch-screen sensors, first and second digitizers, and synchronization and return logic. Each of the first and second digitizers is coupled electronically to the respective touch-screen sensor and configured to provide a pen signal responsive to action of a pen on the touch-screen sensor. The synchronization logic is configured to synchronize the pen to the first and second digitizers and to enable pen tracking by any of the first and second digitizers conditionally, based at least partly on the first and second pen signals. The return logic is configured to expose a result of the pen tracking to an operating system of the touch-screen system.