Rollable Mobile Terminal Display Control for Stable One-Hand Extension
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Solution Overview
Problem
Existing rollable mobile terminals face issues with the display extension process causing the device to depart from a user's hand, necessitating a new method to maintain convenience and stability during display extension.
Innovation Solution
A mobile terminal with a flexible display and a sensing unit that adjusts the size of the display based on input signals, such as touch or force, to maintain a constant total display area, preventing departure by reducing one display area as the other increases, using a controller to manage these changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If the display is extended by withdrawing it from the body, then the display size increases, but the center of gravity changes causing the terminal to depart from the user's hand
Solution Approach 1:
The patent introduces a counterweight unit that generates a counterweight force to compensate for the change in center of gravity during display extension. The counterweight unit includes a counterweight member and a force generator that applies force to offset the gravitational moment change, preventing the terminal from rotating or slipping out of the user's hand during the extension process.
2Ease of operation
If a physical button is used to control display extension, then the operation is simple, but the button location is limited and may interfere with user grip
Solution Approach 1:
The patent replaces the mechanical button system with a sensor-based detection system. The sensor unit detects user grip characteristics (such as grip position, grip force, or hand geometry) and automatically triggers display extension without requiring a physical button. This eliminates the need for dedicated button space and allows the control mechanism to be integrated into the existing device structure.
3Adaptability or versatility
If the display extension mechanism is added, then the display size is variable, but the device structure becomes more complex
Solution Approach 1:
The patent implements a dynamic display extension mechanism where the display can be extended or retracted based on real-time sensor input. The system includes a display assembly that can change its extended state, a sensor unit that monitors user interaction, and a controller that coordinates the extension/retraction action. This dynamic design allows the device to adapt its display size to user needs while maintaining a relatively compact base structure.
Data Source
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Figure 3(a)~3(b)
AI summary
The present specification provides a mobile terminal in which a display unit can expand, and a control method therefor. In the mobile terminal of the present invention, when an input signal detected by a sensing unit is equal to or larger than a threshold value, an operation that expands or contracts the display unit according to a touch drag direction is performed, thus allowing a user to intuitively control the mobile terminal. Further, there is an advantage in that the mobile terminal can be prevented from being dislodged from the user's hand while the display unit is in the process of expanding.