Sliding Flexible Display State Sensing via Conductive Roller Pads
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Solution Overview
Problem
Existing electronic devices with flexible displays face accuracy issues in determining their extended state due to reliance on motor revolutions or magnet and Hall sensor estimates, leading to potential errors.
Innovation Solution
An electronic device with a conductive roller and sensing pads that track the state by sensing contact, allowing for precise determination of the device's state through signal comparison and motor control adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If motor revolutions or magnet and Hall sensor estimates are used to track the extended state, then the device can determine its state without additional sensing components, but accuracy decreases and errors occur
Solution Approach 1:
A conductive roller is introduced as an intermediary component that physically contacts sensing pads at different positions to detect the extended state. The roller acts as a mediator between the mechanical movement and the sensing system, providing direct contact-based detection that improves accuracy while maintaining relatively simple device structure
Solution Approach 2:
The patent replaces the magnetic field-based Hall sensor detection with a direct mechanical contact system. The conductive roller makes physical contact with sensing pads, substituting the indirect magnetic field measurement with direct mechanical interaction, thereby improving measurement accuracy
2Measurement precision
If the number of sensing pads increases to improve state detection accuracy, then measurement precision improves, but device complexity and manufacturing cost increase
Solution Approach 1:
The sensing system is segmented into multiple discrete sensing pads positioned at different locations, each corresponding to a specific extended state. This segmentation allows the system to detect different states through selective contact, achieving high measurement precision with a manageable number of sensing elements
Solution Approach 2:
The conductive roller contacts only the specific sensing pad corresponding to the current extended state, rather than activating all sensing pads simultaneously. This partial action approach maintains high detection accuracy while reducing the effective number of active sensing elements at any given time
Data Source
AI summary
An electronic device is provided. The electronic device includes a first housing, a second housing coupled to the first housing so as to slide in a first direction and a second direction opposite to the first direction, a flexible display including an exposed region that is exposed on a front surface of the electronic device and varied in size in response to sliding of the second housing, a sensing substrate disposed in the first housing, and a conductive roller disposed in the second housing so as to be rotatable. A plurality of sensing pads are disposed on one surface of the sensing substrate. The conductive roller is configured to make contact with a part of the plurality of sensing pads as the second housing slides relative to the first housing. The plurality of sensing pads include a plurality of position pads that make contact with the conductive roller in a state in which the exposed region of the flexible display is formed in one or more specified sizes.