Capacitive Pen Electrode Configuration for Inclination Detection
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Solution Overview
Problem
Current pens, particularly active capacitive pens, require additional time slots for calculating inclination angles, which reduces touch reporting performance and results in lower reporting rates for finger touch and inclination detection.
Innovation Solution
A pen design incorporating a controller, transmitting electrode, and receiving electrode that determines an inclination angle using a signal amount and generates a modulated signal, allowing for two-way communication to omit additional time slots and enhance reporting performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional pens use separate time slots for inclination angle calculation, then inclination detection can be performed, but the reporting rate is reduced and touch performance deteriorates
Solution Approach 1:
The patent combines inclination angle detection with position detection by using the same signal transmission and reception paths. The receiving electrode receives signals from the touch panel, and the transmitting electrode transmits signals back, allowing both inclination and position information to be extracted from the same signal exchange without requiring separate time slots.
Solution Approach 2:
The signal transmission system is designed to serve multiple functions simultaneously. The same electrodes and signal paths used for position detection are also used for inclination angle detection, making the system multi-functional and eliminating the need for dedicated time slots for each measurement type.
2Measurement precision
If additional time slots are allocated for inclination calculation, then accurate inclination detection is achieved, but touch reporting performance is reduced
Solution Approach 1:
The patent merges inclination angle measurement and position measurement into a single time slot by utilizing the bidirectional signal exchange between the touch panel and pen. The signal amount received by the receiving electrode provides inclination information, while the transmitted signal from the transmitting electrode provides position information, both obtained simultaneously.
3Measurement precision
If separate detection mechanisms are used for position and inclination, then detection accuracy is improved, but device complexity increases
Solution Approach 1:
The detection system uses a universal signal exchange mechanism between the touch panel and pen that serves both position and inclination detection. The same electrodes, signal paths, and processing logic are used for both measurement types, reducing device complexity while maintaining detection accuracy for both parameters.
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 design improves the reporting rate of finger touch and inclination angle detection to 60 Hz and 240 Hz respectively, significantly enhancing the pen's touch reporting performance compared to traditional pens.
Implementation Method 1
the receiving electrode is configured to receive a first signal transmitted by the touch panel and transmit the first signal to the controller
Implementation Method 2
the transmitting electrode is configured to receive the second signal from the controller and transmit the second signal to the touch panel
Data Source
AI summary
A pen, a method for detecting a pen, and a touch system are disclosed. The pen is configured to operate on a touch panel. The pen includes a controller, a transmitting electrode, and a receiving electrode. The transmitting electrode and the receiving electrode are at different positions of the pen. The receiving electrode is configured to receive a first signal transmitted by the touch panel and transmit the first signal to the controller. The controller is configured to receive the first signal, determine an inclination angle between the pen and the touch panel according to a signal amount of the first signal, generate a second signal by using an encoding format corresponding to the inclination angle, and transmit the second signal to the transmitting electrode. The transmitting electrode is configured to receive the second signal and transmit the second signal to the touch panel.