Electronic Pen Sensor Integration with Heterogeneous Fingerprint Sensors
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Solution Overview
Problem
Existing electronic pen systems require a dedicated sensor area for accurate coordinate calculation, which is not feasible in heterogeneous sensor areas like those with fingerprint recognition sensors, limiting their integration and functionality.
Innovation Solution
An electronic pen sensing apparatus with an electronic pen sensor and a heterogeneous sensor, where the processor calculates coordinate information by compensating sensing signals from overlapping channel sensors, allowing operation even in areas without a dedicated electronic pen sensor, and adjusts driving frequencies based on sensor signal levels and distances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a dedicated electronic pen sensor area is provided, then coordinate calculation accuracy is improved, but device complexity and area occupation increase
Solution Approach 1:
The patent combines the electronic pen sensor with a heterogeneous sensor (fingerprint recognition sensor) to share the same physical area. The sensor structure integrates multiple functions: it detects electronic pen coordinates through electromagnetic resonance while also performing fingerprint recognition, thereby eliminating the need for separate dedicated sensor areas and reducing overall device complexity
Solution Approach 2:
The sensor is designed to perform multiple functions simultaneously: electronic pen detection, coordinate calculation, and fingerprint recognition. This multi-functional approach allows a single sensor structure to serve multiple purposes, improving coordinate calculation accuracy without increasing device complexity or occupying additional area
2Area of stationary object
If electronic pen sensor and heterogeneous sensor are integrated, then area occupation is reduced, but sensing accuracy in heterogeneous areas deteriorates
Solution Approach 1:
The sensor area is divided into multiple regions: a first area dedicated to the heterogeneous sensor and a second area for electronic pen sensing. By segmenting the sensing zones and applying region-specific processing algorithms, the system maintains high sensing accuracy in the heterogeneous area while optimizing overall area utilization
Solution Approach 2:
The processor dynamically adjusts sensing parameters and compensation algorithms based on the pen's position relative to heterogeneous sensor areas. When the pen is detected in or near the heterogeneous area, the system applies specific compensation processing to maintain sensing accuracy despite the shared sensor infrastructure
3Measurement precision
If compensation processing is applied for heterogeneous sensor areas, then coordinate calculation accuracy in these areas is improved, but processing complexity increases
Solution Approach 1:
The system implements feedback mechanisms where the processor continuously monitors sensing signals from the heterogeneous sensor area and applies real-time compensation processing. The compensation algorithms use feedback from adjacent sensor regions to correct and enhance coordinate calculations in heterogeneous areas, improving accuracy through iterative refinement without requiring overly complex processing architecture
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
Enables accurate coordinate calculation of the electronic pen in heterogeneous sensor areas, facilitating integration with fingerprint recognition sensors and enhancing the functionality of electronic devices.
Implementation Method 1
an electromagnetic resonance (EMR) type electronic pen, which requires no separate power supply
Data Source
AI summary
Disclosed is an electronic pen sensing apparatus including an electronic pen sensor disposed at the upper part or the lower part of a display, a heterogeneous sensor disposed at the lower part of the display, a processor electrically connected to the electronic pen sensor, the processor being configured to output a driving signal to the electronic pen sensor, to calculate coordinate information of the electronic pen based on a sensing signal sensed by the electronic pen sensor, wherein the electronic pen sensor is not disposed in a first area corresponding to the heterogeneous sensor, and the processor calculates first coordinate information of the electronic pen based on a first sensing signal sensed by the electronic pen sensor in the case in which the electronic pen is located in a second area.