Foldable Side-Key Sensing Panels for Hinge-Safe Input
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Solution Overview
Problem
Foldable electronic devices face challenges in user experience and structural integrity due to the placement of physical buttons on the side surface, which can be difficult to press with one hand and may damage the hinge mechanism, and the slim design makes it hard to arrange physical buttons effectively.
Innovation Solution
A foldable electronic device design that replaces physical buttons with touch-sensitive panels on the side surfaces, using sensing panels and a sensor inside the housing to detect external forces and generate key input signals, allowing for a seamless key input experience similar to bar-type devices without exposing buttons.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If physical buttons are disposed on the side surface of one housing, then key input function is provided, but user experience deteriorates when holding the device with one hand and pressing the button with a thumb
Solution Approach 1:
The patent transitions from traditional side-surface button placement to a top-surface button arrangement. By changing the spatial dimension from the side surface to the top surface, the buttons become accessible when the device is held in one hand, significantly improving ease of operation while maintaining a simple overall structure.
Solution Approach 2:
The button structure is designed to serve multiple functions: it provides key input capability, maintains a sleek aesthetic appearance, and remains accessible in various holding positions. The integrated design allows the same button structure to fulfill both functional and aesthetic requirements across different device orientations.
2Reliability
If physical buttons are disposed on the side surface, then key input is enabled, but external force concentrates on one housing causing hinge damage
Solution Approach 1:
The patent merges the button structure with the housing assembly, integrating the buttons into the overall housing design rather than having them as separate components on one housing. This integration distributes the mechanical stress and external forces across the entire housing structure, preventing concentration of force on a single housing and protecting the hinge mechanism.
3Shape
If the device is made slim, then design quality improves, but physical button arrangement becomes increasingly difficult
Solution Approach 1:
By relocating buttons from the narrow side surface to the broader top surface, the design maintains device slimness while providing adequate space for button arrangement. The top surface offers sufficient area for comfortable button placement without increasing the device's side height or compromising its sleek profile.
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 design enhances user experience by eliminating the need for physical buttons, reducing the side height constraint, and preventing hinge damage, while maintaining a slim and unified design.
Implementation Method 1
one or more first side keys disposed near the first side surface within the first housing structure, and including a first sensing panel reflecting a change in an external force applied to the first side surface
Data Source
AI summary
Provided is a foldable electronic device. The electronic device may include: a foldable housing including: a hinge structure; a first housing structure including a first surface, a second surface, and a first side surface; and a second housing structure including a third surface, a fourth surface, and a second side surface, and foldable with the first housing structure with the hinge structure, wherein, in a folded state, the first side surface and the second side surface are aligned; a flexible display; first side keys including a first sensing panel reflecting a change in force applied to the first side surface; second side keys including a second sensing panel reflecting a change in force applied to the second side surface; and a sensor generating a signal based on a change in the force detected by the first sensing panel or the second sensing panel. It is possible to provide other embodiments.