Input Device Electrode Concave-Convex Structure Signal Detection
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Solution Overview
Problem
Current multimedia electronic devices face challenges in providing a precise and intuitive input method for users accustomed to writing instruments, particularly for applications like sketching or drawing, as existing touch-based input methods lack the finesse and accuracy required for such tasks.
Innovation Solution
An input device with a housing, a tip electrode for transmitting signals externally, a reception electrode for receiving signals internally, and a communication circuit for bidirectional communication, featuring a concave-convex structure on the electrode surfaces to enhance signal transmission and reception performance, is integrated with a display device to enable precise input detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the electrode length is increased to improve signal transmission and reception performance, then the communication performance is improved, but the device size increases
Solution Approach 1:
The patent transitions from linear electrode extension to three-dimensional surface structure by creating concave-convex patterns on the electrode surface. This dimensional change allows the electrode to achieve greater effective surface area within the same footprint, improving signal transmission and reception without increasing the overall device length.
Solution Approach 2:
The patent applies non-uniform surface structures (concave and convex portions) to specific regions of the electrode rather than uniformly extending the electrode length. This local modification optimizes signal interaction at critical contact points while maintaining a compact overall device form factor.
2Measurement precision
If a flat electrode surface is used, then the manufacturing process is simple, but the signal reception sensitivity is insufficient
Solution Approach 1:
The patent introduces vertical surface variations (concave and convex portions) to the electrode, transforming a two-dimensional flat surface into a three-dimensional structured surface. This enhances signal reception sensitivity by increasing effective surface area and improving contact characteristics without requiring complex manufacturing processes.
Solution Approach 2:
The patent modifies the surface geometry parameters of the electrode by introducing controlled concave and convex features. These parameter changes (surface profile, curvature, depth) optimize signal detection sensitivity while maintaining compatibility with standard manufacturing techniques.
Data Source
AI summary
An input device includes: a housing; a tip electrode protruding outside of the housing and configured to transmit a downlink signal to the outside; a reception electrode inside the housing and configured to receive an uplink signal from the outside; and a communication circuit electrically connected to the tip electrode and the reception electrode and configured to receive the uplink signal from the reception electrode or to transmit the downlink signal to the tip electrode, wherein a surface of the reception electrode has a concave-convex structure.