Foldable Device Touch Coordinate Rotation
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Solution Overview
Problem
Foldable electronic apparatuses face usability issues when transitioning from landscape to portrait states due to inconsistent touchpad coordinates and reaction directions, leading to inconvenient user interactions.
Innovation Solution
Incorporating first and second gravity sensors to detect Euler angles and adjust the display frame and touch input coordinates accordingly, ensuring consistent user input directions by swapping vertical and horizontal coordinates when the device changes from landscape to portrait mode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the foldable electronic apparatus is placed in a portrait state with touchpad on left and right sides, then the device can be held in portrait orientation, but the touchpad coordinates remain oriented horizontally which conflicts with the portrait screen orientation
Solution Approach 1:
The patent applies dynamics by making the touchpad coordinate system dynamically adjustable based on device orientation. The controller detects whether the device is in landscape or portrait mode and automatically switches the touchpad coordinate orientation accordingly. In landscape mode, the touchpad uses horizontal coordinates; in portrait mode, the touchpad coordinates are rotated to match the vertical screen orientation, ensuring consistent input-direction mapping across different device states.
Solution Approach 2:
The patent changes the coordinate system parameters of the touchpad based on device orientation. When transitioning from landscape to portrait mode, the controller swaps the horizontal and vertical coordinate parameters of the touchpad, effectively rotating the coordinate system by 90 degrees. This parameter change ensures that the touch input directions align with the screen content orientation, resolving the conflict between fixed touchpad coordinates and variable screen orientation.
2Device complexity
If the touchpad coordinates remain in horizontal orientation during portrait mode, then the touchpad structure remains simple, but the input direction becomes inconsistent with the screen reaction direction
Solution Approach 1:
Rather than maintaining a fixed horizontal coordinate system, the patent implements a dynamic coordinate system that adapts to device orientation. The controller detects portrait mode and automatically rotates the touchpad coordinate system to match the vertical screen orientation, ensuring that upward finger movements on the touchpad correspond to upward movements on the screen regardless of device orientation.
Solution Approach 2:
The patent changes the coordinate parameters of the touchpad based on detected orientation. In portrait mode, the controller swaps the x and y coordinate parameters of the touchpad, effectively rotating the coordinate system. This parameter transformation maintains directional consistency between touch input and screen response without requiring complex hardware modifications.
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 provides an intuitive operation experience by ensuring that the touch input direction aligns with the screen reaction, enhancing usability across different device orientations.
Implementation Method 1
a first Euler angle of the first body and a second Euler angle of the second body in a three-dimensional space are respectively detected by the first G sensor and the second G sensor
Data Source
AI summary
An input method applied to a foldable electronic apparatus with pivotally connected first and second bodies is provided. The first body includes a display and a first G sensor. The second body includes a touch input portion and a second G sensor. First and second Euler angles of the first and second bodies are respectively detected by the first and second G sensors. A placement state of the foldable electronic apparatus is determined according to the first and second Euler angles. When the placement state is determined as a landscape state, the display displays a horizontal frame, and an input signal is executed according to the horizontal frame. When the placement state is converted to a portrait state, the horizontal frame is rotated to a portrait frame, the input signal is executed according to the portrait frame, and vertical and horizontal coordinates of the touch input portion are swapped.