EMR Sensor Panel Multi-Layer Structure for Stylus Position Detection
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Solution Overview
Problem
Conventional electromagnetic radiation (EMR) sensor panels in electronic devices are unable to accurately detect stylus pen positions, especially at the edges of the active area due to limitations in loop coil pattern design, leading to inaccurate input detection.
Innovation Solution
The EMR sensor panel is designed with a multi-layer structure comprising a first layer of conductive lines extending parallel to a first direction, a second layer with conductive lines perpendicular to the first direction, and a third layer with bridge lines forming loop coils, where conductive vias connect the lines, maximizing the sensing area and minimizing overlapping areas to enhance position detection accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional loop coil pattern design is used in the EMR sensor panel, then the device structure remains simple, but the position detection accuracy deteriorates at the edges of the active area
Solution Approach 1:
The sensor panel is divided into multiple layers (first layer with first conductive lines, second layer with second conductive lines, third layer with bridge lines) to create a segmented loop coil pattern. This segmentation allows each layer to contribute to the overall sensing capability, improving edge detection accuracy while maintaining manageable structural complexity through modular design
Solution Approach 2:
The patent transitions from a conventional single-plane loop coil pattern to a multi-layer three-dimensional structure. The conductive lines are arranged in different layers with bridge lines connecting them, creating a volumetric sensing pattern that enhances edge detection capability by utilizing the third dimension (layer depth) in addition to the traditional two-dimensional plane
2Measurement precision
If the EMR sensor panel uses a multi-layer structure with conductive vias to maximize sensing area, then position detection accuracy improves, but manufacturing complexity increases
Solution Approach 1:
The multi-layer structure is segmented into distinct functional layers that can be manufactured and assembled separately. The first layer, second layer, and third layer can be processed independently and then combined through conductive vias, making the complex multi-layer structure more manufacturable than a monolithic design
Solution Approach 2:
The patent employs a nested layer structure where the first layer, second layer, and third layer are stacked and interconnected through conductive vias. This nesting approach allows compact integration of multiple conductive line patterns within a limited space, maximizing sensing area while managing manufacturing complexity through systematic layer integration
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 configuration allows for precise detection of stylus pen positions across the entire active area, including edges, reducing errors and improving user input accuracy without the need for additional signal compensation processes.
Implementation Method 1
an electromagnetic radiation (EMR) sensor panel which detects an indicated position using a stylus pen... The EMR sensor panel may detect the indicated position using the EMR with a resonance circuit of the stylus pen
Data Source
AI summary
An electronic device according to various embodiments may include an electromagnetic radiation (EMR) sensor panel and a sensor circuit configured to detect a stylus pen, using the EMR sensor panel, wherein the EMR sensor panel comprises a first layer, a second layer, and a third layer which are substantially parallel to the display panel, the first layer comprises a first plurality of conductive lines which extend parallel to one another in a first direction, the second layer comprises a second plurality of conductive lines which extend parallel to one another in a second direction substantially perpendicular to the first direction, and the third layer includes a third plurality of conductive lines, each of the third plurality of conductive lines electrically connected to ends of respective two of the first plurality of the conductive lines or the second plurality of the conductive lines, through conductive vias formed through at least one of the first layer, the second layer, or the third layer.