Flexible Display Expansion Sensing With Liquid Electrode Resistance
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Solution Overview
Problem
Existing electronic devices with flexible displays face challenges in accurately sensing the expansion state of the display without being influenced by external factors such as magnetic sensors or surrounding environments, particularly when multiple users gaze at the screen simultaneously.
Innovation Solution
An electronic device featuring a deformable member with a liquid-state electrode and a deformation sensing circuit that detects resistance changes to determine the exposure degree of the display area, using a connector member and fixed structures to restrict movement and maintain accurate sensing, regardless of external factors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a magnetic sensor is used to sense the expansion level of the flexible display, then the display expansion can be detected, but the sensing is influenced by external factors such as surrounding environments and other electronic components
Solution Approach 1:
The patent replaces the magnetic sensing system with a mechanical deformation sensing system. A deformable member with a liquid-state electrode is coupled to the flexible display, and a deformation sensing circuit measures resistance changes of the liquid electrode as the member deforms with the display, eliminating magnetic interference while maintaining detection capability
Solution Approach 2:
The deformable member acts as an intermediary between the flexible display and the sensing circuit. The liquid-state electrode within the deformable member translates mechanical deformation into electrical resistance changes, providing indirect measurement that isolates the sensing circuit from direct exposure to external magnetic factors
2Ease of operation
If eye recognition is used to determine user gaze, then user interaction can be enabled, but errors occur when multiple persons gaze at the screen simultaneously
Solution Approach 1:
The patent replaces optical eye recognition with a mechanical deformation-based sensing system. The deformable member with liquid electrode directly measures physical expansion state of the display, providing unambiguous detection that works reliably regardless of multiple users or lighting conditions
3Measurement precision
If the deformable member is allowed to move freely to track display expansion, then accurate sensing is achieved, but movement in the opposite direction is not restricted causing potential errors
Solution Approach 1:
The patent segments the constraint system into multiple independent fixed structures positioned at different locations. Each fixed structure restricts movement in specific directions, collectively providing comprehensive stabilization while allowing the deformable member to expand and contract along the display's expansion direction
Solution Approach 2:
The fixed structures apply localized constraints at specific positions on the deformable member and rigid member, allowing freedom of movement in the expansion direction while restricting movement in opposite directions. This selective constraint maintains sensing accuracy without over-constraining the system
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 allows for precise detection of the display's expansion state, ensuring accurate operation and user interaction without interference from external factors, enhancing the reliability and usability of flexible display devices.
Implementation Method 1
a deformable member including a liquid-state electrode, the deformable member being configured to deform in a length direction of the deformable member based on the flexible display transitioning between the first state and the second state
Implementation Method 2
a deformation sensing circuit configured to sense a resistance component of the liquid-state electrode, the resistance component corresponding to an exposure degree of the display area
Data Source
AI summary
An electronic device includes: a flexible display that is configured to be deformable to a first state, in which an exposed amount of a display area of the flexible display has a first size, and a second state, in which the exposed amount of the display area is expanded in a first direction; a deformable member including a liquid-state electrode, the deformable member configured to deform in a length direction based on the flexible display transitioning between the first state and the second state; a deformation sensing circuit configured to sense a resistance component of the liquid-state electrode, the resistance component corresponding to an exposure degree of the display area; a connector member electrically connecting the deformable member and the deformation sensing circuit; a rigid member coupled to the deformable member; and a fixed structure contacting a partial area of the rigid member.