Hybrid Pen Input Device for Accurate Inclination Detection
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Solution Overview
Problem
Conventional EMR type stylus pen input devices using a single coil cannot accurately measure inclined angles and directions, leading to coordinate errors and limitations in using stylus or writing brush effects, and require additional correction methods involving gravity sensors and offset tables.
Innovation Solution
A hybrid pen input device supporting both electromagnetic induction and electrostatic functions, with a resonance circuit unit and dielectric coating, allows for accurate detection of inclined angles and directions using a single coil, enabling improved coordinate correction and palm rejection functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single coil is used in an EMR type stylus pen input device, then the device structure is simplified, but the measurement precision of inclined angle and inclined direction deteriorates
Solution Approach 1:
The patent changes the measurement parameters by calculating inclined angle and inclined direction from coordinate differences detected by the single coil, rather than directly measuring these parameters with multiple coils. This allows accurate measurement of writing position, inclined angle, and inclined direction using only one coil.
2Device complexity
If a single coil is used in an EMR type stylus pen input device, then the device complexity is reduced, but the manufacturing precision of coordinate correction deteriorates
Solution Approach 1:
The patent replaces the mechanical approach of using multiple coils to physically measure inclined angle with a computational method that calculates these parameters from electrical coordinate data obtained by a single coil, achieving the same functional result with simpler hardware.
Solution Approach 2:
The patent introduces coordinate information as an intermediary parameter. Instead of directly measuring inclined angle and direction with multiple coils, the single coil detects writing position coordinates, and these coordinate differences serve as intermediaries to calculate the inclined parameters.
3Device complexity
If conventional EMR type stylus pen uses single coil, then device structure is simplified, but the reliability of input recognition deteriorates due to coordinate errors
Solution Approach 1:
The patent uses feedback by continuously calculating and correcting writing position, inclined angle, and inclined direction based on coordinate differences detected by the single coil. This feedback mechanism ensures accurate input recognition despite using simplified hardware.
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
The hybrid device provides accurate coordinate information and enhances writing precision by correcting inclination errors, allowing for more nuanced input recognition and improved usability with both EMR and passive electrostatic stylus functions.
Implementation Method 1
an EMR pen function... allows for accurate detection of inclined angles and directions
Implementation Method 2
passive electrostatic stylus (touch pen) function... with a resonance circuit unit and dielectric coating
Data Source
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AI summary
An electronic device and a method for correcting an input coordinate of the electronic device are provided. The electronic device includes a pen input device configured to support an electromagnetic induction function and an electrostatic pen function; a touch screen including a digitizer pad, an electrostatic capacitive touch panel disposed above the digitizer pad, a digitizer pad controller configured to detect a recognition coordinate calculated from electromagnetic induction from the digitizer pad, and a touch panel controller configured to detect an input coordinate in relation to a change of an electrostatic capacitance from the touch panel; and a processor configured to generate inclination information of the pen input device and coordinate correction based on a write pressure of the pen input device, the recognition coordinate information provided by the digitizer pad controller, and the input coordinate information provided by the electrostatic capacitive touch panel controller.