Input Sensor Electrode Structure for Pen Sensing Accuracy
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electronic devices face challenges in accurately sensing pen coordinates due to high parasitic capacitance, which can lead to recognition errors and malfunctions, especially when the performance of the driving chip is limited.
Innovation Solution
The electronic device incorporates a modified electrode structure for the input sensor, including additional sensing electrodes and dummy electrodes connected through bridge patterns, which reduces parasitic capacitance and improves coordinate recognition accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional unit sensor structure is used, then device complexity is low, but sensing reliability deteriorates due to high parasitic capacitance and dead sections between sensors
Solution Approach 1:
The patent merges sensing electrodes from adjacent unit sensors into a shared structure. Specifically, the first sensing electrode of the first unit sensor is connected to the first adjacent dummy electrode of the third unit sensor, and the second sensing electrode of the first unit sensor is connected to the first adjacent dummy electrode of the second unit sensor. This merging eliminates dead sections between sensors and reduces parasitic capacitance, thereby improving sensing reliability without significantly increasing device complexity.
Solution Approach 2:
The patent introduces dummy electrodes as intermediary elements between sensing electrodes of adjacent unit sensors. These dummy electrodes serve as mediators to connect sensing electrodes from different unit sensors, reducing parasitic capacitance and eliminating dead sections. The dummy electrodes act as buffer elements that maintain electrical continuity while isolating the sensing regions, thus improving reliability without adding complex functionality.
2Reliability
If sensing electrode extension to adjacent sensors is implemented, then pen sensing reliability improves, but manufacturing precision requirements increase
Solution Approach 1:
The patent uses dummy electrodes as copies or representations of the sensing electrode structure. These dummy electrodes replicate the geometric and electrical characteristics of the sensing electrodes, allowing for standardized manufacturing processes. By using dummy electrodes as templates or reference structures, the patent simplifies the manufacturing of precise electrode connections between adjacent unit sensors, thereby reducing the burden on manufacturing precision while maintaining high sensing reliability.
3Measurement precision
If additional connection units and bridge patterns are added, then coordinate recognition accuracy improves, but device complexity increases
Solution Approach 1:
The patent designs the connection units and bridge patterns to serve multiple functions simultaneously. The first connection unit connects first sensing units adjacent to each other, while the second connection unit connects second sensing units adjacent to each other. The bridge patterns not only provide electrical connections but also serve as structural support and alignment references. This multi-functionality reduces the need for separate components, thereby improving coordinate recognition accuracy without proportionally increasing device complexity.
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 enhances the accuracy and linearity of pen input sensing, even with lower performing driving chips, by minimizing dead sections between unit sensors and maintaining continuous sensitivity, thus improving sensing reliability.
Implementation Method 1
The electronic device may recognize the coordinates of a pen using an electromagnetic resonance (EMR) method
Implementation Method 2
The electronic device may recognize the coordinates of a pen using an active electrostatic (AES) method
Implementation Method 3
Existing electronic devices face challenges in accurately sensing pen coordinates due to high parasitic capacitance
Data Source
AI summary
An electronic device includes: an input sensor including a plurality of unit sensors each having a first unit sensor, a second unit sensor, and a third unit sensor adjacent, wherein each of the first, second, and third unit sensors includes: a first sensing electrode extending in the first direction; a second sensing electrode extending in the second direction; and a first dummy electrode between the first sensing electrode and the second sensing electrode, wherein the first sensing electrode of the first unit sensor is connected to a first adjacent dummy electrode of the first dummy electrodes of the third unit sensor adjacent to the first unit sensor, and wherein the second sensing electrode of the first unit sensor is connected to a first adjacent dummy electrode of the first dummy electrodes of the second unit sensor adjacent to the first unit sensor.