Rollable Display Bending Member with Locking Jaw for Birdcaging Prevention
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Solution Overview
Problem
The occurrence of a birdcaging phenomenon in flexible displays during pull-in or pull-out operations of rollable electronic devices, which leads to deteriorated display performance.
Innovation Solution
Incorporation of a bending member with a first bar featuring a locking part and a sliding frame with a locking jaw to prevent the birdcaging phenomenon by ensuring proper alignment and support of the flexible display during retracting or extracting operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If the bending member is drawn into the housing during pull-in operation, then the display area is reduced, but the birdcaging phenomenon occurs causing deteriorated display performance
Solution Approach 1:
The locking jaw is positioned in advance at a predetermined location on the sliding frame to engage with the locking part on the bending member before the birdcaging phenomenon can occur during the pull-in operation, preventing the deterioration of display performance
Solution Approach 2:
The locking jaw acts as an intermediary component between the bending member and the sliding frame, providing a mechanical engagement point that prevents the birdcaging phenomenon by controlling the movement of the bending member during retraction
2Reliability
If the locking part and locking jaw are engaged at a predetermined position, then the birdcaging phenomenon is prevented, but the device structure becomes more complex
Solution Approach 1:
The bending member is segmented into multiple bars with locking parts, allowing the structure to maintain simplicity while providing discrete engagement points that prevent the birdcaging phenomenon during retraction
Solution Approach 2:
The locking jaw is designed as a flexible or thin structural element on the sliding frame that can engage with the locking part without adding significant structural complexity, while still effectively preventing the birdcaging phenomenon
Data Source
AI summary
An electronic device may include a housing; a sliding frame, at least a portion of which is drawn out from the housing in a first direction, or at least a portion of which is retracted into the housing in a second direction; a flexible display including a first region visible from the outside, and a second region extending from the first region and varying in size; and a bending member disposed on a rear surface of the flexible display, the bending member including a plurality of bars arranged in a certain interval. The bending member may include a first bar including at least one first locking part protruding in an inner direction of the electronic device.