Rollable Display Crack Detection Using Segmented Edge Wires
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Solution Overview
Problem
Rollable displays in electronic devices are prone to cracks and damage due to differences in curvature when slid in and out, particularly in the rolling parts, which can compromise the display's integrity and functionality.
Innovation Solution
The electronic device incorporates a display driver integrated circuit (IC) with multiple detection wires connected to the display to detect cracks or damage in the fixed and rolling parts, allowing for real-time monitoring and control of the display's operation, including segmenting the rolling part into areas for precise damage detection and maintaining screen ratio during a slide-out state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the rollable display is repeatedly rolled and unrolled during slide-in and slide-out operations, then the display area can be extended and reduced, but cracks and damage occur in the rolling part due to curvature differences between layers
Solution Approach 1:
The patent divides the display into a fixed part and a rolling part, and further segments the rolling part into multiple detection areas (first rolling part and second rolling part) with separate detection wires. This segmentation allows targeted crack detection in specific high-risk areas, enabling the system to identify and respond to damage localized in the rolling portion while maintaining overall display functionality.
Solution Approach 2:
The patent implements a feedback mechanism where detection wires continuously monitor the rolling part for cracks, and the processor receives signals from these wires to determine crack presence. When cracks are detected, the processor can control the display driver IC to disable specific areas or alert the user, creating a closed-loop system that responds to damage in real-time and prevents further degradation.
2Reliability
If multiple layers are stacked through adhesive members to improve durability, then the bendable area receives reinforcement, but the complexity of the display structure increases
Solution Approach 1:
The patent segments the detection function into separate detection wires positioned at specific locations within the multiple layers. Rather than using a single complex detection system across all layers, the detection wires are distributed at strategic points where cracks most likely occur, simplifying the overall structure while maintaining effective monitoring capability.
Solution Approach 2:
The patent applies detection wires locally at specific positions within the multi-layer structure where crack risk is highest, rather than uniformly distributing detection capabilities throughout the entire display. This localized approach to monitoring reduces the overall complexity while maintaining durability through targeted reinforcement and monitoring at critical stress points.
3Measurement precision
If the rolling part is segmented into multiple areas for precise damage detection, then crack detection accuracy improves, but the device complexity increases
Solution Approach 1:
The patent segments the rolling part into distinct detection areas (first rolling part and second rolling part) with separate detection wires positioned at different locations. This segmentation enables independent monitoring of each area, improving crack detection accuracy by identifying the specific location and extent of damage, while the modular nature of separate detection wires keeps the added complexity manageable.
Solution Approach 2:
The patent implements detection wires at specific critical locations within the rolling part rather than providing comprehensive coverage throughout the entire display. By placing detection wires at strategic points where cracks most likely occur, the system achieves high detection accuracy for the most important areas without the excessive complexity of universal monitoring across the entire display surface.
Data Source
AI summary
An electronic device is provided. The electronic device includes a housing, a display including a fixed part which maintains a flat surface, and a rolling part which extends from the fixed part and of which one portion is bent in response to movement so as to be partially withdrawn out of the housing or inserted into the housing, a display driver integrated circuit (IC) configured to drive the display, memory, including one or more storage media, storing instructions, and at least one processor, configured to control the display driver IC, communicatively coupled to the display, the display driver IC, and the memory, wherein the display includes multiple detection wires connected to the display driver IC to distinguish and detect damage of the fixed part or the rolling part, and arranged on an edge of the display.