Mobile Terminal One-Handed Reachability via Dynamic Button Repositioning
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Solution Overview
Problem
Operating large-screen mobile terminal devices with one hand is inconvenient due to buttons being out of reach, requiring the use of the other hand to perform touch gestures.
Innovation Solution
The device determines an operating region on the screen reachable by the user's thumb and adjusts button placement using inclination detection, allowing buttons to be moved into reach by tilting the device, and prioritizes frequently used buttons for easier access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the screen size of the mobile terminal device is increased, then the display area and visual experience are improved, but the buttons become unreachable with one hand, reducing ease of operation
Solution Approach 1:
The patent applies dynamics by making the button layout adjustable rather than fixed. The control unit dynamically repositions buttons based on detected grip position and orientation, allowing the interface to adapt to different holding scenarios. This resolves the contradiction by enabling large screens to maintain one-handed accessibility through dynamic layout adjustment.
Solution Approach 2:
The patent changes the parameter of button position based on detected grip characteristics. By monitoring acceleration data to determine device orientation and grip position, the system adjusts button placement parameters in real-time, allowing unreachable buttons to be repositioned within the user's reach zone while maintaining large display area.
2Ease of operation
If buttons are repositioned to be reachable with one hand, then ease of operation is improved, but the original button layout and design are disrupted
Solution Approach 1:
The button layout transitions from static to dynamic, repositioning itself based on detected grip orientation. This allows the interface to maintain stability in its adaptive behavior - always positioning buttons within reach - while accepting temporary positional changes as the user adjusts their grip, thus resolving the contradiction between operational ease and layout stability.
Solution Approach 2:
The system uses feedback from acceleration sensors to detect grip position and orientation, then adjusts button placement accordingly. This closed-loop feedback mechanism ensures buttons remain accessible while maintaining a consistent, predictable layout relative to the user's hand position, resolving the contradiction between adaptability and stability.
3Ease of operation
If the device detects grip force and adjusts display, then one-handed operability is improved, but device complexity increases due to additional sensors and control logic
Solution Approach 1:
The patent replaces dedicated grip force sensors with acceleration sensors that already exist in modern mobile devices. By using existing mechanical sensors (accelerometers) to infer grip characteristics through device orientation and movement patterns, the system achieves one-handed detection functionality without adding complex sensing hardware, thus resolving the contradiction between operational improvement and device complexity.
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 enhances one-handed operability by allowing users to access buttons without needing the other hand, improving usability for both small-handed users and those with large devices or protective cases.
Implementation Method 1
a sensor (16) that detects an inclination of the housing (11)
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
A mobile terminal device (10) includes: a housing (11); a touch panel-equipped display section (12); a sensor (16); and a control unit (20) including a processor and, upon execution of a control program by the processor, functioning as an operating region decision section (23), a specific inclination determination section (24), and a display change section (25). The operating region decision section (23) determines, during holding of the housing (11) with one hand, an operating region on a screen of the display section (12) reachable with an operating finger of the one hand from a trace of points of touch with the operating finger. When an inclination of the housing (11) detected by the sensor (16) is determined to be a specific inclination toward the operating finger by the specific inclination determination section (24), the display change section (25) moves and displays on-screen objects into and within the operating region .