Dynamic Pen Offset Adjustment for Parallax Correction
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Solution Overview
Problem
Conventional devices with touch screens experience visual offset issues when writing with a pen, as the display output does not accurately align with the pen contact point due to parallax and fixed offset assumptions, which become problematic when the user changes their writing position or device orientation.
Innovation Solution
A method that uses a processor to detect pen input and other associated inputs, such as palm contact or sensor data, to dynamically adjust the display output's position, ensuring it remains visible and correctly aligned with the pen contact point, even when the user changes their hand or device orientation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a fixed offset is used to position display output relative to pen contact point, then the implementation is simple, but the alignment accuracy deteriorates when user position or device orientation changes
Solution Approach 1:
The patent applies dynamics by transitioning from a static fixed offset to a dynamic offset that changes based on device orientation and user position. The system continuously updates the offset values (offsetX, offsetY) based on sensor data and transformation matrices, allowing the display output to remain accurately aligned with the pen contact point regardless of orientation changes or palm position variations.
2Adaptability or versatility
If the device is used at different orientations or positions, then the adaptability improves, but the visual offset issue worsens due to parallax and fixed offset assumptions
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting offset parameters (offsetX, offsetY) based on device orientation angles and transformation matrices. The system calculates new offset values using trigonometric functions of the orientation angle and applies these updated parameters to reposition the display output, maintaining accurate alignment across different device orientations and user positions.
3Device complexity
If a fixed offset is assumed for all writing positions, then the system complexity is reduced, but the writing precision deteriorates when palm position changes
Solution Approach 1:
The patent applies feedback by using sensor data about device orientation and palm position to continuously adjust the offset calculations. The system receives feedback from orientation sensors and uses this information to update transformation matrices and recalculate offset values, creating a closed-loop system that maintains writing precision despite changes in palm position or device orientation.
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 solution effectively mitigates visual offset issues by dynamically adjusting the display output's position based on real-time user and device orientation data, maintaining alignment with the pen contact point regardless of changes in user position or device orientation, thereby enhancing the digital writing experience.
Implementation Method 1
the thickness of the cover glass creates parallax
Data Source
AI summary
An embodiment provides a method, including detecting, using a processor, pen input to a surface of an electronic device; accessing, using a processor, one or more other inputs associated in time with the pen input; and adjusting, using a processor, a location of a display output representing the pen input using both of the detected pen input and the one or more other inputs. Other aspects are described and claimed.