Sensor System Segmentation for Stylus Detection
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Solution Overview
Problem
Existing sensor systems for detecting styluses face issues with signal discrimination between multiple panels due to asymmetrical signal reach distances, leading to potential disconnection of routing wires as panels open and close, affecting system reliability.
Innovation Solution
A sensor system with separate sensor electrode groups and integrated circuits for each housing, where the transmission of uplink signals is managed independently to prevent interference and disconnection, using a flexible IC connection line to reduce the likelihood of wire disconnection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single integrated circuit connects multiple electrode groups on different panels, then stylus detection capability is improved, but routing wire disconnection risk increases due to repeated panel opening and closing
Solution Approach 1:
The patent divides the sensor system into separate units for each panel. Each panel has its own integrated circuit and electrode groups, eliminating the need for long routing wires connecting multiple panels. This segmentation allows each panel to operate independently while maintaining stylus detection capability, thereby preventing routing wire disconnection issues.
Solution Approach 2:
The patent introduces a communication interface as an intermediary between separate panel units. Each panel's integrated circuit communicates detection results and control signals through this interface, enabling coordinated operation without direct physical wire connections between panels, thus preventing disconnection problems.
2Area of stationary object
If uplink signals are transmitted from multiple electrode groups simultaneously, then signal coverage is improved, but signal discrimination capability deteriorates due to interference between panels
Solution Approach 1:
The patent implements periodic action by having each electrode group transmit uplink signals in alternating time slots rather than simultaneously. The first electrode group transmits during its designated time slot, then the second electrode group transmits during its time slot. This time-division multiplexing maintains comprehensive signal coverage while eliminating interference, enabling accurate signal discrimination.
Solution Approach 2:
The patent employs feedback mechanisms where each integrated circuit monitors signals from its electrode group and adjusts transmission timing based on detection results. The communication interface provides feedback between panels to coordinate signal transmission, ensuring that uplink signals are transmitted in a manner that maintains coverage while preventing interference through adaptive timing control.
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 prevents stylus detection interference between panels and enhances reliability by managing uplink signal transmission independently and reducing the probability of wire disconnection, allowing for wider electrode placement and improved sensor system performance.
Implementation Method 1
an uplink signal is transmitted through capacitive coupling between a sensor electrode group provided on a panel and a stylus
Data Source
AI summary
A sensor system, which detects a stylus and is provided in an electronic apparatus, includes a first integrated circuit, a second integrated circuit, and an integrated circuit connection line that couples the first integrated circuit and the second integrated circuit to each other. The first integrated circuit is connected to a first sensor electrode group, and detects a position of the stylus on a panel face of a first housing. The second integrated circuit is connected to a second sensor electrode group, and detects a position of the stylus on a panel face of a second housing. When the first integrated circuit detects a presence of the stylus, a notification indicative of the detection is issued to the second integrated circuit through the integrated circuit connection line such that transmission of an uplink signal through the second sensor electrode group by the second integrated circuit is stopped.