Touch Screen Display Shift for Rocking Vehicle Operation
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Solution Overview
Problem
Existing personal digital assistants with touch screens, such as smartphones and tablets, experience erroneous operations when used in rocking vehicles due to the mismatch between the user's hand movements and the device's position, leading to unintended touch targets despite the object being still on the screen.
Innovation Solution
Incorporating a shaking detection unit that analyzes the relative shaking amount of the user's operation instruction object and adjusts the display of objects on the touch screen accordingly, ensuring accurate touch operations by shifting the display position based on the calculated shaking amount.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the display position and operation detection region are set to substantially coincide, then the touch operation accuracy is improved, but erroneous operations occur when the device is used in rocking vehicles
Solution Approach 1:
The operation detection region is made dynamic by expanding it based on the detected shaking amount. When shaking is detected, the operation detection region expands in the shaking direction to compensate for the relative displacement between the user's finger and the display object, thereby maintaining reliable operation detection despite device movement.
Solution Approach 2:
The system detects the shaking amount and direction of the device, then uses this feedback information to dynamically adjust the operation detection region. This closed-loop control ensures that the detection region adapts to real-time shaking conditions, preventing erroneous operations while maintaining normal operation precision when not shaking.
2Reliability
If the operation detection region is expanded to prevent erroneous operations, then the reliability in rocking vehicle is improved, but the normal operation precision deteriorates
Solution Approach 1:
The operation detection region dynamically adjusts its size and position based on real-time shaking detection. During normal operation without shaking, the region maintains its standard precise boundaries. When shaking occurs, the region expands only in the necessary direction and magnitude to compensate for displacement, thus maintaining precision when needed while ensuring reliability during shaking.
Solution Approach 2:
The operation detection region applies different properties to different situations: in normal conditions, it maintains tight, precise boundaries for accurate operation detection; during shaking, it locally expands in the shaking direction to capture the displaced touch target. This localized adaptation prevents unnecessary expansion that would degrade normal operation precision.
3Reliability
If the display position is shifted to compensate for shaking, then the operation reliability is improved, but the display stability deteriorates
Solution Approach 1:
The system dynamically adjusts the operation detection region based on real-time shaking detection rather than pre-defining multiple fixed regions. This dynamic adaptation allows the detection region to smoothly follow the shaking motion, maintaining display stability while improving operation reliability during vehicle movement.
Data Source
AI summary
A personal digital assistant includes a display control unit that causes an object as a target of the touch operation to be displayed in the image display unit, an image input unit that acquires a video of an operation instruction object that performs the touch operation on the touch screen, and a shaking detection unit that analyzes the video of the operation instruction object, which is acquired by the image input unit, and calculates a relative shaking amount of the operation instruction object to a position of the personal digital assistant as a reference. The display control unit causes the object to be displayed in the image display unit to be displayed, based on the relative shaking amount of the operation instruction object, which is calculated by the shaking detection unit, such that the object is shifted in accordance with the relative shaking amount.