Pen Detection System Using Segmented Electrodes and Dual ICs
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Solution Overview
Problem
The increasing size of display panels necessitates a larger number of electrodes and integrated circuits in pen detection systems, leading to increased costs, as few systems are manufactured specifically for large panels, and dedicated integrated circuits are often required.
Innovation Solution
A pen detection system with a sensor pattern featuring partial column and row electrode groups, where two integrated circuits acquire signal level distributions from overlapping partial electrode groups, allowing position derivation without a dedicated integrated circuit for large panels, and boundary electrodes connected to both circuits to reduce noise sensitivity differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the display panel size is increased, then the detection area is improved, but the number of electrodes and integrated circuits must be increased leading to higher costs
Solution Approach 1:
The electrode group is divided into multiple partial electrode groups (first partial column electrode group, second partial column electrode group, first partial row electrode group, second partial row electrode group). Each partial group is connected to a separate integrated circuit, allowing the system to cover a large detection area while using multiple smaller, standardized integrated circuits instead of requiring a single large custom circuit.
Solution Approach 2:
The patent enables the use of standardized integrated circuits designed for smaller panels to be applied to large display panels through the segmentation approach. The same type of integrated circuit can serve multiple partial electrode groups, creating a universal solution that works across different panel sizes without requiring dedicated custom circuits for each size.
2Quantity of substance
If the number of electrodes is increased to cover larger panels, then the detection coverage is improved, but the number of integrated circuit terminals must be increased
Solution Approach 1:
The system segments both the electrode group and the integrated circuit connections. By dividing the electrode group into partial groups and assigning each to a separate integrated circuit, the patent reduces the number of terminals required per integrated circuit while maintaining support for a large total number of electrodes across the entire display panel.
3Reliability
If dedicated integrated circuits are manufactured for large panels, then the detection performance is improved, but the manufacturing cost increases
Solution Approach 1:
The patent creates a universal integrated circuit design that can be used across multiple panel sizes. The same integrated circuit model can serve both small and large panels by connecting to appropriate partial electrode groups, eliminating the need to manufacture dedicated custom circuits for each panel size while maintaining detection performance.
Solution Approach 2:
By segmenting the large panel into multiple regions handled by separate integrated circuits, the system can use standardized, mass-produced integrated circuits rather than requiring custom-designed large-panel circuits. This segmentation allows existing reliable integrated circuit designs to be reused, maintaining detection performance while reducing manufacturing costs.
Data Source
AI summary
A pen detection system is provided that detects a pen signal transmitted from a pen to detect a position of the pen. The system includes a sensor pattern in which an electrode group including first and second partial electrode groups is disposed; a first integrated circuit that is connected to the first partial electrode group to acquire a level distribution of the pen signal in the first partial electrode group; and a second integrated circuit that is connected to the second partial electrode group to acquire a level distribution of the pen signal in the second partial electrode group. A predetermined number of boundary electrodes positioned near a boundary of the first partial electrode group and the second partial electrode group among a plurality of electrodes included in the electrode group are connected to both of the first and second integrated circuits, wherein the predetermined number is an even number.