Touch Panel Electrode Configuration for Active Pen Angle Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electronic devices face challenges in accurately sensing the position and angle of active pens due to limitations in electrode configurations and signal detection, leading to reduced sensing reliability.
Innovation Solution
The electronic device incorporates a specific electrode configuration with first and second regions on the display panel, featuring main and subsidiary electrodes that cross each other, along with auxiliary electrodes, to enhance sensing accuracy by calculating the angle of the active pen relative to the input sensor's surface based on distinct signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional electrode configuration is used, then the device structure remains simple, but the sensing reliability and accuracy for detecting active pen position and angle deteriorates
Solution Approach 1:
Each sensing electrode is divided into multiple sub-electrodes (first sub-electrode, second sub-electrode, third sub-electrode, fourth sub-electrode) arranged in a specific pattern. This segmentation allows the system to detect not only touch position but also the angle of the active pen by analyzing differential capacitance changes between adjacent sub-electrodes, thereby improving sensing reliability without requiring a completely new electrode architecture
Solution Approach 2:
The patent applies different electrode configurations to different regions of the display panel. The sensing electrodes with multiple sub-electrodes are specifically arranged in regions where active pen detection is critical, while maintaining simpler configurations elsewhere. This local optimization improves sensing accuracy where needed while controlling overall device complexity
2Measurement precision
If the device size and thickness are reduced, then the portability and compactness improve, but the sensing accuracy for detecting active pen position and angle deteriorates
Solution Approach 1:
The patent transitions from conventional single-layer electrode configurations to a multi-layer electrode structure with sensing electrodes arranged in both first and second directions. This three-dimensional electrode arrangement enables the system to maintain high sensing accuracy for both position and angle detection even when the device thickness is reduced, as the vertical stacking of electrode layers compensates for the reduced lateral space
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 improves the sensing reliability by accurately detecting the position and angle of active pens, even in reduced sizes and thicknesses, providing enhanced accuracy and reliability in pen-based interactions.
Implementation Method 1
an input sensor, in which a first region, a second region enclosing the first region, and a third region enclosing the second region are defined, on the display panel and including sensing electrodes including a first electrode including a first main electrode and a first subsidiary electrode
Data Source
AI summary
An electronic device may include a display panel, and an input sensor, in which a first region, a second region enclosing the first region, and a third region enclosing the second region are defined, on the display panel and including sensing electrodes including a first electrode including a first main electrode and a first subsidiary electrode, and a second electrode adjacent the first electrode, and including a second main electrode and a second subsidiary electrode between the first main electrode and the first subsidiary electrode in the first region.