Flexible Slide-Out Display Tension Control for Lifting
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Solution Overview
Problem
Electronic devices with flexible slide-out displays face issues with a non-smooth screen due to the elasticity of the flexible display when expanded or retracted, leading to reliability concerns.
Innovation Solution
An electronic device with a housing, a flexible display, a support member, and a dielectric surface electrically connected to ground, along with a sensor IC integrated with the touch sensing circuit to detect capacitance changes, allowing for the detection of lifting phenomena and adjustment of tension to maintain a smooth display operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If a flexible display is extracted from the inner space to expand the screen, then the screen size is increased, but the display surface becomes non-smooth due to lifting caused by the elasticity of the flexible display
Solution Approach 1:
The patent applies preliminary action by providing tension adjustment mechanisms that pre-adjust the tension of the flexible display before expansion occurs. The tension adjustment member is configured to maintain appropriate tension levels during the expansion and retraction process, preventing lifting phenomena from occurring in the first place. This proactive approach ensures the display surface remains smooth throughout the transition states.
Solution Approach 2:
The patent utilizes parameter changes by dynamically adjusting the tension parameter of the flexible display. The tension adjustment member modifies the physical state of the flexible display by changing its tension level, allowing the display to maintain smoothness during expansion and retraction. This parameter adjustment compensates for the elastic properties that would otherwise cause lifting.
2Ease of operation
If the flexible display is made more elastic to improve flexibility during sliding, then the ease of operation is improved, but the lifting phenomenon becomes more severe
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the tension parameter of the flexible display to compensate for its elastic properties. The tension adjustment member modifies the physical state of the flexible display, allowing it to maintain both flexibility for smooth operation and sufficient tension to prevent lifting. This enables the display to exhibit controlled elasticity without suffering from uncontrolled lifting phenomena.
Solution Approach 2:
The patent implements feedback through a sensor that detects the state of the flexible display during expansion and retraction. The sensor provides information about the display's position and tension state, which is then used to adjust the tension adjustment member accordingly. This closed-loop feedback system ensures that the tension is optimized to prevent lifting while maintaining the flexibility needed for ease of operation.
3Reliability
If a support member is added to prevent lifting, then the display smoothness is improved, but the device complexity increases
Solution Approach 1:
The patent applies universality by designing the tension adjustment member to serve multiple functions simultaneously. It not only prevents lifting phenomena but also maintains the flexible display's flexibility during operation, provides tension control during both expansion and retraction, and works integrally with the sensor system. This multi-functional design reduces the need for separate components, thereby limiting the increase in device complexity.
Solution Approach 2:
The patent merges the support function with the tension adjustment mechanism. Rather than adding a separate support structure, the tension adjustment member is integrated to provide both structural support and tension control in a single component. This merging approach prevents lifting while minimizing the increase in device complexity by consolidating functions.
4Reliability
If tension adjustment is implemented to prevent lifting, then the display smoothness is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The patent applies self-service by designing the tension adjustment member to automatically adjust tension based on the flexible display's state. The mechanism is configured to respond to the display's position and tension requirements without requiring complex external control systems or high-precision manual adjustment. This self-adjusting capability reduces manufacturing precision requirements while still achieving smooth display operation.
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
The solution effectively addresses the reliability issues by detecting and mitigating lifting phenomena, ensuring a smooth and reliable operation of the flexible display during expansion and retraction, enhancing the overall performance and user experience.
Implementation Method 1
a sensor integrated circuit (IC) electrically connected to a touch sensing circuit included in the flexible display and configured to detect capacitance of a touch area facing the dielectric in the touch sensing circuit
Data Source
AI summary
An electronic device is provided that includes a housing and a flexible display including a bendable section that may be extracted from an inner space of the housing. The electronic device also includes a support member positioned at least partially in the inner space of the housing and including a first surface facing the bendable section with a separation distance therebetween, and a dielectric disposed in the first surface while facing the bendable section and electrically connected to a ground. The electronic device also includes a sensor integrated circuit (IC) electrically connected to a touch sensing circuit included in the flexible display and configured to detect capacitance of a touch area facing the dielectric in the touch sensing circuit.