Pen Input Sensor Layer Weighting for Precise Stylus Detection
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Solution Overview
Problem
Existing multimedia electronic devices lack efficient methods for sensing inputs using a pen, particularly for fine touch inputs, which are essential for users accustomed to writing instruments or specific applications like sketching or drawing.
Innovation Solution
The electronic device incorporates a sensor layer with a specific arrangement of sensing electrodes and lines, along with a sensor driver that applies different signal weighting values and gains to sensing signals, enabling precise detection of pen inputs through magnetic field induction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a sensor layer with multiple electrodes and lines is added to enable pen sensing, then pen input detection capability is improved, but device complexity increases
Solution Approach 1:
The sensor layer is designed to perform multiple functions: it detects both touch inputs and pen inputs using the same electrode structure. The first and second sensing electrodes serve dual purposes for different input types, eliminating the need for separate sensing systems and reducing overall device complexity while maintaining versatility
Solution Approach 2:
The sensor layer is divided into a main region and a peripheral region with different electrode arrangements. The peripheral region has extended lines that specifically facilitate pen sensing, while the main region handles general touch sensing. This segmentation allows optimized performance for each function without requiring a complete redesign of the entire sensor layer
2Measurement precision
If different weighting values are applied to sensing signals from different lines, then pen input precision is improved, but signal processing complexity increases
Solution Approach 1:
Different weighting values are applied to sensing signals based on their origin: signals from lines in the peripheral region receive different weighting than signals from the main region. This local differentiation optimizes precision for pen inputs detected at different locations without requiring complex global processing adjustments
Solution Approach 2:
The weighting values are predetermined and assigned to different line signals before actual sensing occurs. This preliminary configuration of processing parameters simplifies real-time signal processing, as the system only needs to apply pre-established weights rather than dynamically calculate complex processing parameters during operation
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 accurate and sensitive detection of pen inputs, enhancing user interaction capabilities without increasing device thickness or weight, and supports both touch and pen-based inputs efficiently.
Implementation Method 1
in a driving mode to generate a magnetic field for charging a pen, the sensor driver is configured to apply a first signal to the third line and a second signal, different from the first signal, to the fourth line
Implementation Method 2
enabling precise detection of pen inputs through magnetic field induction
Data Source
AI summary
Disclosed is an electronic device including a sensor layer and a sensor driver. The sensor layer includes a plurality of first sensing electrodes, a plurality of first electrodes, a plurality of second sensing electrodes, a plurality of second electrodes, and a plurality of lines. The plurality of lines includes a first line electrically connected to one of the plurality of second sensing electrodes and in a first peripheral region, a second line electrically connected to another one of the plurality of second sensing electrodes and in a second peripheral region, wherein, in a sensing mode to sense an input of the pen, the sensor driver is configured to apply a first weighting value to a first sensing signal received from the first line and a second weighting value, different from the first weighting value, to a second sensing signal received from the second line.